Added an H5MM_memcpy call that checks for buffer overlap.

115 files changed, 546 insertions, 513 deletions

diff --git a/src/H5Abtree2.c b/src/H5Abtree2.c
index 07da8e2..825043b 100644
--- a/src/H5Abtree2.c
+++ b/src/H5Abtree2.c
@@ -318,7 +318,7 @@ H5A__dense_btree2_name_encode(uint8_t *raw, const void *_nrecord, void H5_ATTR_U
     FUNC_ENTER_STATIC_NOERR
 
     /* Encode the record's fields */
-    HDmemcpy(raw, nrecord->id.id, (size_t)H5O_FHEAP_ID_LEN);
+    H5MM_memcpy(raw, nrecord->id.id, (size_t)H5O_FHEAP_ID_LEN);
     raw += H5O_FHEAP_ID_LEN;
     *raw++ = nrecord->flags;
     UINT32ENCODE(raw, nrecord->corder)
@@ -349,7 +349,7 @@ H5A__dense_btree2_name_decode(const uint8_t *raw, void *_nrecord, void H5_ATTR_U
     FUNC_ENTER_STATIC_NOERR
 
     /* Decode the record's fields */
-    HDmemcpy(nrecord->id.id, raw, (size_t)H5O_FHEAP_ID_LEN);
+    H5MM_memcpy(nrecord->id.id, raw, (size_t)H5O_FHEAP_ID_LEN);
     raw += H5O_FHEAP_ID_LEN;
     nrecord->flags = *raw++;
     UINT32DECODE(raw, nrecord->corder)
@@ -477,7 +477,7 @@ H5A__dense_btree2_corder_encode(uint8_t *raw, const void *_nrecord, void H5_ATTR
     FUNC_ENTER_STATIC_NOERR
 
     /* Encode the record's fields */
-    HDmemcpy(raw, nrecord->id.id, (size_t)H5O_FHEAP_ID_LEN);
+    H5MM_memcpy(raw, nrecord->id.id, (size_t)H5O_FHEAP_ID_LEN);
     raw += H5O_FHEAP_ID_LEN;
     *raw++ = nrecord->flags;
     UINT32ENCODE(raw, nrecord->corder)
@@ -507,7 +507,7 @@ H5A__dense_btree2_corder_decode(const uint8_t *raw, void *_nrecord, void H5_ATTR
     FUNC_ENTER_STATIC_NOERR
 
     /* Decode the record's fields */
-    HDmemcpy(nrecord->id.id, raw, (size_t)H5O_FHEAP_ID_LEN);
+    H5MM_memcpy(nrecord->id.id, raw, (size_t)H5O_FHEAP_ID_LEN);
     raw += H5O_FHEAP_ID_LEN;
     nrecord->flags = *raw++;
     UINT32DECODE(raw, nrecord->corder)
diff --git a/src/H5Aint.c b/src/H5Aint.c
index 6502fa4..88a4780 100644
--- a/src/H5Aint.c
+++ b/src/H5Aint.c
@@ -646,21 +646,21 @@ H5A__read(const H5A_t *attr, const H5T_t *mem_type, void *buf)
                     HGOTO_ERROR(H5E_ATTR, H5E_NOSPACE, FAIL, "memory allocation failed")
 
                 /* Copy the attribute data into the buffer for conversion */
-                HDmemcpy(tconv_buf, attr->shared->data, (src_type_size * nelmts));
+                H5MM_memcpy(tconv_buf, attr->shared->data, (src_type_size * nelmts));
 
                 /* Perform datatype conversion.  */
                 if(H5T_convert(tpath, src_id, dst_id, nelmts, (size_t)0, (size_t)0, tconv_buf, bkg_buf) < 0)
                     HGOTO_ERROR(H5E_ATTR, H5E_CANTENCODE, FAIL, "datatype conversion failed")
 
                 /* Copy the converted data into the user's buffer */
-                HDmemcpy(buf, tconv_buf, (dst_type_size * nelmts));
+                H5MM_memcpy(buf, tconv_buf, (dst_type_size * nelmts));
             } /* end if */
             /* No type conversion necessary */
             else {
                 HDassert(dst_type_size == src_type_size);
 
                 /* Copy the attribute data into the user's buffer */
-                HDmemcpy(buf, attr->shared->data, (dst_type_size * nelmts));
+                H5MM_memcpy(buf, attr->shared->data, (dst_type_size * nelmts));
             } /* end else */
         } /* end else */
     } /* end if */
@@ -747,7 +747,7 @@ H5A__write(H5A_t *attr, const H5T_t *mem_type, const void *buf)
                 HGOTO_ERROR(H5E_ATTR, H5E_CANTALLOC, FAIL, "memory allocation failed")
 
             /* Copy the user's data into the buffer for conversion */
-            HDmemcpy(tconv_buf, buf, (src_type_size * nelmts));
+            H5MM_memcpy(tconv_buf, buf, (src_type_size * nelmts));
 
             /* Perform datatype conversion */
             if(H5T_convert(tpath, src_id, dst_id, nelmts, (size_t)0, (size_t)0, tconv_buf, bkg_buf) < 0)
@@ -771,7 +771,7 @@ H5A__write(H5A_t *attr, const H5T_t *mem_type, const void *buf)
                     HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
 
             /* Copy the attribute data into the user's buffer */
-            HDmemcpy(attr->shared->data, buf, (dst_type_size * nelmts));
+            H5MM_memcpy(attr->shared->data, buf, (dst_type_size * nelmts));
         } /* end else */
 
         /* Modify the attribute in the object header */
@@ -827,7 +827,7 @@ H5A__get_name(H5A_t *attr, size_t buf_size, char *buf)
 
     /* Copy all/some of the name */
     if(buf && copy_len > 0) {
-        HDmemcpy(buf, attr->shared->name, copy_len);
+        H5MM_memcpy(buf, attr->shared->name, copy_len);
 
         /* Terminate the string */
         buf[copy_len]='\0';
@@ -2240,7 +2240,7 @@ H5A__attr_copy_file(const H5A_t *attr_src, H5F_t *file_dst, hbool_t *recompute_s
             if(NULL == (buf = H5FL_BLK_MALLOC(attr_buf, buf_size)))
                 HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation NULLed for raw data chunk")
 
-            HDmemcpy(buf, attr_src->shared->data, attr_src->shared->data_size);
+            H5MM_memcpy(buf, attr_src->shared->data, attr_src->shared->data_size);
 
 	    /* Allocate background memory */
 	    if(H5T_path_bkg(tpath_src_mem) || H5T_path_bkg(tpath_mem_dst))
@@ -2251,7 +2251,7 @@ H5A__attr_copy_file(const H5A_t *attr_src, H5F_t *file_dst, hbool_t *recompute_s
             if(H5T_convert(tpath_src_mem, tid_src, tid_mem, nelmts, (size_t)0, (size_t)0, buf, bkg_buf) < 0)
                 HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "datatype conversion NULLed")
 
-            HDmemcpy(reclaim_buf, buf, buf_size);
+            H5MM_memcpy(reclaim_buf, buf, buf_size);
 
 	    /* Set background buffer to all zeros */
 	    if(bkg_buf)
@@ -2261,14 +2261,14 @@ H5A__attr_copy_file(const H5A_t *attr_src, H5F_t *file_dst, hbool_t *recompute_s
             if(H5T_convert(tpath_mem_dst, tid_mem, tid_dst, nelmts, (size_t)0, (size_t)0, buf, bkg_buf) < 0)
                 HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, NULL, "datatype conversion NULLed")
 
-            HDmemcpy(attr_dst->shared->data, buf, attr_dst->shared->data_size);
+            H5MM_memcpy(attr_dst->shared->data, buf, attr_dst->shared->data_size);
 
             if(H5D_vlen_reclaim(tid_mem, buf_space, reclaim_buf) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_BADITER, NULL, "unable to reclaim variable-length data")
         }  /* end if */
         else {
             HDassert(attr_dst->shared->data_size == attr_src->shared->data_size);
-            HDmemcpy(attr_dst->shared->data, attr_src->shared->data, attr_src->shared->data_size);
+            H5MM_memcpy(attr_dst->shared->data, attr_src->shared->data, attr_src->shared->data_size);
         } /* end else */
     } /* end if(attr_src->shared->data) */
 
diff --git a/src/H5B.c b/src/H5B.c
index 2772bb9..4cf1f72 100644
--- a/src/H5B.c
+++ b/src/H5B.c
@@ -484,10 +484,10 @@ H5B__split(H5F_t *f, H5B_ins_ud_t *bt_ud, unsigned idx,
      */
 
     split_bt_ud->cache_flags = H5AC__DIRTIED_FLAG;
-    HDmemcpy(split_bt_ud->bt->native,
+    H5MM_memcpy(split_bt_ud->bt->native,
 	     bt_ud->bt->native + nleft * shared->type->sizeof_nkey,
 	     (nright + 1) * shared->type->sizeof_nkey);
-    HDmemcpy(split_bt_ud->bt->child,
+    H5MM_memcpy(split_bt_ud->bt->child,
             &bt_ud->bt->child[nleft],
             nright * sizeof(haddr_t));
 
@@ -612,9 +612,9 @@ H5B_insert(H5F_t *f, const H5B_class_t *type, haddr_t addr, void *udata)
 
     /* update left and right keys */
     if(!lt_key_changed)
-	HDmemcpy(lt_key, H5B_NKEY(bt_ud.bt,shared,0), type->sizeof_nkey);
+	H5MM_memcpy(lt_key, H5B_NKEY(bt_ud.bt,shared,0), type->sizeof_nkey);
     if(!rt_key_changed)
-	HDmemcpy(rt_key, H5B_NKEY(split_bt_ud.bt,shared,split_bt_ud.bt->nchildren), type->sizeof_nkey);
+	H5MM_memcpy(rt_key, H5B_NKEY(split_bt_ud.bt,shared,split_bt_ud.bt->nchildren), type->sizeof_nkey);
 
     /*
      * Copy the old root node to some other file location and make the new root
@@ -657,11 +657,11 @@ H5B_insert(H5F_t *f, const H5B_class_t *type, haddr_t addr, void *udata)
     new_root_bt->nchildren = 2;
 
     new_root_bt->child[0] = bt_ud.addr;
-    HDmemcpy(H5B_NKEY(new_root_bt, shared, 0), lt_key, shared->type->sizeof_nkey);
+    H5MM_memcpy(H5B_NKEY(new_root_bt, shared, 0), lt_key, shared->type->sizeof_nkey);
 
     new_root_bt->child[1] = split_bt_ud.addr;
-    HDmemcpy(H5B_NKEY(new_root_bt, shared, 1), md_key, shared->type->sizeof_nkey);
-    HDmemcpy(H5B_NKEY(new_root_bt, shared, 2), rt_key, shared->type->sizeof_nkey);
+    H5MM_memcpy(H5B_NKEY(new_root_bt, shared, 1), md_key, shared->type->sizeof_nkey);
+    H5MM_memcpy(H5B_NKEY(new_root_bt, shared, 2), rt_key, shared->type->sizeof_nkey);
 
     /* Insert the modified copy of the old root into the file again */
     if(H5AC_insert_entry(f, H5AC_BT, addr, new_root_bt, H5AC__NO_FLAGS_SET) < 0)
@@ -726,9 +726,9 @@ H5B__insert_child(H5B_t *bt, unsigned *bt_flags, unsigned idx,
     base = H5B_NKEY(bt, shared, (idx + 1));
     if((idx + 1) == bt->nchildren) {
         /* Make room for the new key */
-        HDmemcpy(base + shared->type->sizeof_nkey, base,
+        H5MM_memcpy(base + shared->type->sizeof_nkey, base,
                   shared->type->sizeof_nkey);   /* No overlap possible - memcpy() OK */
-        HDmemcpy(base, md_key, shared->type->sizeof_nkey);
+        H5MM_memcpy(base, md_key, shared->type->sizeof_nkey);
 
         /* The MD_KEY is the left key of the new node */
         if(H5B_INS_RIGHT == anchor)
@@ -741,7 +741,7 @@ H5B__insert_child(H5B_t *bt, unsigned *bt_flags, unsigned idx,
         /* Make room for the new key */
         HDmemmove(base + shared->type->sizeof_nkey, base,
                   (bt->nchildren - idx) * shared->type->sizeof_nkey);
-        HDmemcpy(base, md_key, shared->type->sizeof_nkey);
+        H5MM_memcpy(base, md_key, shared->type->sizeof_nkey);
 
         /* The MD_KEY is the left key of the new node */
         if(H5B_INS_RIGHT == anchor)
@@ -915,7 +915,7 @@ H5B__insert_helper(H5F_t *f, H5B_ins_ud_t *bt_ud, const H5B_class_t *type,
              * node. This node is not empty (handled above).
              */
             my_ins = H5B_INS_LEFT;
-            HDmemcpy(md_key, H5B_NKEY(bt,shared,idx), type->sizeof_nkey);
+            H5MM_memcpy(md_key, H5B_NKEY(bt,shared,idx), type->sizeof_nkey);
             if((type->new_node)(f, H5B_INS_LEFT, H5B_NKEY(bt, shared, idx), udata,
                     md_key, &new_child_bt_ud.addr/*out*/) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTINSERT, H5B_INS_ERROR, "can't insert minimum leaf node")
@@ -963,7 +963,7 @@ H5B__insert_helper(H5F_t *f, H5B_ins_ud_t *bt_ud, const H5B_class_t *type,
              */
             idx = bt->nchildren - 1;
             my_ins = H5B_INS_RIGHT;
-            HDmemcpy(md_key, H5B_NKEY(bt, shared, idx + 1), type->sizeof_nkey);
+            H5MM_memcpy(md_key, H5B_NKEY(bt, shared, idx + 1), type->sizeof_nkey);
             if((type->new_node)(f, H5B_INS_RIGHT, md_key, udata,
                     H5B_NKEY(bt, shared, idx + 1), &new_child_bt_ud.addr/*out*/) < 0)
                 HGOTO_ERROR(H5E_BTREE, H5E_CANTINSERT, H5B_INS_ERROR, "can't insert maximum leaf node")
@@ -1021,7 +1021,7 @@ H5B__insert_helper(H5F_t *f, H5B_ins_ud_t *bt_ud, const H5B_class_t *type,
             *lt_key_changed = FALSE;
         } /* end if */
         else
-            HDmemcpy(lt_key, H5B_NKEY(bt, shared, idx), type->sizeof_nkey);
+            H5MM_memcpy(lt_key, H5B_NKEY(bt, shared, idx), type->sizeof_nkey);
     } /* end if */
     if(*rt_key_changed) {
         bt_ud->cache_flags |= H5AC__DIRTIED_FLAG;
@@ -1031,7 +1031,7 @@ H5B__insert_helper(H5F_t *f, H5B_ins_ud_t *bt_ud, const H5B_class_t *type,
             *rt_key_changed = FALSE;
         } /* end if */
         else
-            HDmemcpy(rt_key, H5B_NKEY(bt, shared, idx + 1), type->sizeof_nkey);
+            H5MM_memcpy(rt_key, H5B_NKEY(bt, shared, idx + 1), type->sizeof_nkey);
     } /* end if */
 
     /*
@@ -1080,7 +1080,7 @@ H5B__insert_helper(H5F_t *f, H5B_ins_ud_t *bt_ud, const H5B_class_t *type,
      * by the left and right node).
      */
     if(split_bt_ud->bt) {
-	HDmemcpy(md_key, H5B_NKEY(split_bt_ud->bt, shared, 0), type->sizeof_nkey);
+	H5MM_memcpy(md_key, H5B_NKEY(split_bt_ud->bt, shared, 0), type->sizeof_nkey);
 	ret_value = H5B_INS_RIGHT;
 #ifdef H5B_DEBUG
 	/*
@@ -1339,7 +1339,7 @@ H5B__remove_helper(H5F_t *f, haddr_t addr, const H5B_class_t *type, int level,
             /* Don't propagate change out of this B-tree node */
             *lt_key_changed = FALSE;
         else
-            HDmemcpy(lt_key, H5B_NKEY(bt, shared, idx), type->sizeof_nkey);
+            H5MM_memcpy(lt_key, H5B_NKEY(bt, shared, idx), type->sizeof_nkey);
     } /* end if */
     if(*rt_key_changed) {
         HDassert(type->critical_key == H5B_RIGHT);
@@ -1348,7 +1348,7 @@ H5B__remove_helper(H5F_t *f, haddr_t addr, const H5B_class_t *type, int level,
             /* Don't propagate change out of this B-tree node */
             *rt_key_changed = FALSE;
         else
-            HDmemcpy(rt_key, H5B_NKEY(bt, shared, idx + 1), type->sizeof_nkey);
+            H5MM_memcpy(rt_key, H5B_NKEY(bt, shared, idx + 1), type->sizeof_nkey);
     } /* end if */
 
     /*
@@ -1383,7 +1383,7 @@ H5B__remove_helper(H5F_t *f, haddr_t addr, const H5B_class_t *type, int level,
                      * in its left neighbor, but only if it is not the critical
                      * key for the right-most child of the left neighbor */
                     if(type->critical_key == H5B_LEFT)
-                        HDmemcpy(H5B_NKEY(sibling, shared, sibling->nchildren),
+                        H5MM_memcpy(H5B_NKEY(sibling, shared, sibling->nchildren),
                                 H5B_NKEY(bt, shared, 1), type->sizeof_nkey);
 
                     sibling->right = bt->right;
@@ -1400,7 +1400,7 @@ H5B__remove_helper(H5F_t *f, haddr_t addr, const H5B_class_t *type, int level,
                      * its right neighbor, but only if it is not the critical
                      * key for the left-most child of the right neighbor */
                     if(type->critical_key == H5B_RIGHT)
-                        HDmemcpy(H5B_NKEY(sibling, shared, 0),
+                        H5MM_memcpy(H5B_NKEY(sibling, shared, 0),
                                 H5B_NKEY(bt, shared, 0), type->sizeof_nkey);
 
                     sibling->left = bt->left;
@@ -1442,7 +1442,7 @@ H5B__remove_helper(H5F_t *f, haddr_t addr, const H5B_class_t *type, int level,
                 /* Slide all keys down 1, update lt_key */
                 HDmemmove(H5B_NKEY(bt, shared, 0), H5B_NKEY(bt, shared, 1),
                         bt->nchildren * type->sizeof_nkey);
-                HDmemcpy(lt_key, H5B_NKEY(bt, shared, 0), type->sizeof_nkey);
+                H5MM_memcpy(lt_key, H5B_NKEY(bt, shared, 0), type->sizeof_nkey);
                 *lt_key_changed = TRUE;
             } else
                 /* Slide all but the leftmost 2 keys down, leaving the leftmost
@@ -1471,7 +1471,7 @@ H5B__remove_helper(H5F_t *f, haddr_t addr, const H5B_class_t *type, int level,
                         H5B_NKEY(bt, shared, bt->nchildren), type->sizeof_nkey);
             else {
                 /* Just update rt_key */
-                HDmemcpy(rt_key, H5B_NKEY(bt, shared, bt->nchildren - 1),
+                H5MM_memcpy(rt_key, H5B_NKEY(bt, shared, bt->nchildren - 1),
                         type->sizeof_nkey);
                 *rt_key_changed = TRUE;
             } /* end else */
@@ -1516,7 +1516,7 @@ H5B__remove_helper(H5F_t *f, haddr_t addr, const H5B_class_t *type, int level,
         if(NULL == (sibling = (H5B_t *)H5AC_protect(f, H5AC_BT, bt->left, &cache_udata, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, H5B_INS_ERROR, "unable to protect node")
 
-        HDmemcpy(H5B_NKEY(sibling, shared, sibling->nchildren),
+        H5MM_memcpy(H5B_NKEY(sibling, shared, sibling->nchildren),
                 H5B_NKEY(bt, shared, 0), type->sizeof_nkey);
 
         if(H5AC_unprotect(f, H5AC_BT, bt->left, sibling, H5AC__DIRTIED_FLAG) < 0)
@@ -1531,7 +1531,7 @@ H5B__remove_helper(H5F_t *f, haddr_t addr, const H5B_class_t *type, int level,
         if(NULL == (sibling = (H5B_t *)H5AC_protect(f, H5AC_BT, bt->right, &cache_udata, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, H5B_INS_ERROR, "unable to protect node")
 
-        HDmemcpy(H5B_NKEY(sibling, shared, 0),
+        H5MM_memcpy(H5B_NKEY(sibling, shared, 0),
                 H5B_NKEY(bt, shared, bt->nchildren), type->sizeof_nkey);
 
         if(H5AC_unprotect(f, H5AC_BT, bt->right, sibling, H5AC__DIRTIED_FLAG) < 0)
@@ -1811,7 +1811,7 @@ H5B__copy(const H5B_t *old_bt)
         HGOTO_ERROR(H5E_BTREE, H5E_CANTALLOC, NULL, "memory allocation failed for B-tree root node")
 
     /* Copy the main structure */
-    HDmemcpy(new_node, old_bt, sizeof(H5B_t));
+    H5MM_memcpy(new_node, old_bt, sizeof(H5B_t));
 
     /* Reset cache info */
     HDmemset(&new_node->cache_info, 0, sizeof(H5AC_info_t));
@@ -1821,8 +1821,8 @@ H5B__copy(const H5B_t *old_bt)
         HGOTO_ERROR(H5E_BTREE, H5E_CANTALLOC, NULL, "memory allocation failed for B-tree root node")
 
     /* Copy the other structures */
-    HDmemcpy(new_node->native, old_bt->native, shared->sizeof_keys);
-    HDmemcpy(new_node->child, old_bt->child, (sizeof(haddr_t) * shared->two_k));
+    H5MM_memcpy(new_node->native, old_bt->native, shared->sizeof_keys);
+    H5MM_memcpy(new_node->child, old_bt->child, (sizeof(haddr_t) * shared->two_k));
 
     /* Increment the ref-count on the raw page */
     H5UC_INC(new_node->rc_shared);
diff --git a/src/H5B2.c b/src/H5B2.c
index cf8e4a9..6b0d7a3 100644
--- a/src/H5B2.c
+++ b/src/H5B2.c
@@ -662,7 +662,7 @@ H5B2_find(H5B2_t *bt2, void *udata, H5B2_found_t op, void *op_data)
                         if(hdr->min_native_rec == NULL)
                             if(NULL == (hdr->min_native_rec = H5MM_malloc(hdr->cls->nrec_size)))
                                 HGOTO_ERROR(H5E_BTREE, H5E_CANTALLOC, FAIL, "memory allocation failed for v2 B-tree min record info")
-                        HDmemcpy(hdr->min_native_rec, H5B2_LEAF_NREC(leaf, hdr, idx), hdr->cls->nrec_size);
+                        H5MM_memcpy(hdr->min_native_rec, H5B2_LEAF_NREC(leaf, hdr, idx), hdr->cls->nrec_size);
                     } /* end if */
                 } /* end if */
                 if(idx == (unsigned)(leaf->nrec - 1)) {
@@ -670,7 +670,7 @@ H5B2_find(H5B2_t *bt2, void *udata, H5B2_found_t op, void *op_data)
                         if(hdr->max_native_rec == NULL)
                             if(NULL == (hdr->max_native_rec = H5MM_malloc(hdr->cls->nrec_size)))
                                 HGOTO_ERROR(H5E_BTREE, H5E_CANTALLOC, FAIL, "memory allocation failed for v2 B-tree max record info")
-                        HDmemcpy(hdr->max_native_rec, H5B2_LEAF_NREC(leaf, hdr, idx), hdr->cls->nrec_size);
+                        H5MM_memcpy(hdr->max_native_rec, H5B2_LEAF_NREC(leaf, hdr, idx), hdr->cls->nrec_size);
                     } /* end if */
                 } /* end if */
             } /* end if */
@@ -1343,7 +1343,7 @@ H5B2_modify(H5B2_t *bt2, void *udata, H5B2_modify_t op, void *op_data)
                         if(hdr->min_native_rec == NULL)
                             if(NULL == (hdr->min_native_rec = H5MM_malloc(hdr->cls->nrec_size)))
                                 HGOTO_ERROR(H5E_BTREE, H5E_CANTALLOC, FAIL, "memory allocation failed for v2 B-tree min record info")
-                        HDmemcpy(hdr->min_native_rec, H5B2_LEAF_NREC(leaf, hdr, idx), hdr->cls->nrec_size);
+                        H5MM_memcpy(hdr->min_native_rec, H5B2_LEAF_NREC(leaf, hdr, idx), hdr->cls->nrec_size);
                     } /* end if */
                 } /* end if */
                 if(idx == (unsigned)(leaf->nrec - 1)) {
@@ -1351,7 +1351,7 @@ H5B2_modify(H5B2_t *bt2, void *udata, H5B2_modify_t op, void *op_data)
                         if(hdr->max_native_rec == NULL)
                             if(NULL == (hdr->max_native_rec = H5MM_malloc(hdr->cls->nrec_size)))
                                 HGOTO_ERROR(H5E_BTREE, H5E_CANTALLOC, FAIL, "memory allocation failed for v2 B-tree max record info")
-                        HDmemcpy(hdr->max_native_rec, H5B2_LEAF_NREC(leaf, hdr, idx), hdr->cls->nrec_size);
+                        H5MM_memcpy(hdr->max_native_rec, H5B2_LEAF_NREC(leaf, hdr, idx), hdr->cls->nrec_size);
                     } /* end if */
                 } /* end if */
             } /* end if */
diff --git a/src/H5B2cache.c b/src/H5B2cache.c
index 2e1d37b..2a77bd5 100644
--- a/src/H5B2cache.c
+++ b/src/H5B2cache.c
@@ -391,7 +391,7 @@ H5B2__cache_hdr_serialize(const H5F_t *f, void *_image, size_t H5_ATTR_UNUSED le
     HDassert(hdr);
 
     /* Magic number */
-    HDmemcpy(image, H5B2_HDR_MAGIC, (size_t)H5_SIZEOF_MAGIC);
+    H5MM_memcpy(image, H5B2_HDR_MAGIC, (size_t)H5_SIZEOF_MAGIC);
     image += H5_SIZEOF_MAGIC;
 
     /* Version # */
@@ -811,7 +811,7 @@ H5B2__cache_int_serialize(const H5F_t *f, void *_image, size_t H5_ATTR_UNUSED le
     HDassert(internal->hdr);
 
     /* Magic number */
-    HDmemcpy(image, H5B2_INT_MAGIC, (size_t)H5_SIZEOF_MAGIC);
+    H5MM_memcpy(image, H5B2_INT_MAGIC, (size_t)H5_SIZEOF_MAGIC);
     image += H5_SIZEOF_MAGIC;
 
     /* Version # */
@@ -1212,7 +1212,7 @@ H5B2__cache_leaf_serialize(const H5F_t H5_ATTR_UNUSED *f, void *_image, size_t H
     HDassert(leaf->hdr);
 
     /* magic number */
-    HDmemcpy(image, H5B2_LEAF_MAGIC, (size_t)H5_SIZEOF_MAGIC);
+    H5MM_memcpy(image, H5B2_LEAF_MAGIC, (size_t)H5_SIZEOF_MAGIC);
     image += H5_SIZEOF_MAGIC;
 
     /* version # */
diff --git a/src/H5B2int.c b/src/H5B2int.c
index b3f855f..a6dfe0e 100644
--- a/src/H5B2int.c
+++ b/src/H5B2int.c
@@ -241,17 +241,17 @@ H5B2__split1(H5B2_hdr_t *hdr, uint16_t depth, H5B2_node_ptr_t *curr_node_ptr,
     mid_record = old_node_nrec / 2;
 
     /* Copy "upper half" of records to new child */
-    HDmemcpy(H5B2_NAT_NREC(right_native, hdr, 0),
+    H5MM_memcpy(H5B2_NAT_NREC(right_native, hdr, 0),
             H5B2_NAT_NREC(left_native, hdr, mid_record + (unsigned)1),
             hdr->cls->nrec_size * (old_node_nrec - (mid_record + (unsigned)1)));
 
     /* Copy "upper half" of node pointers, if the node is an internal node */
     if(depth > 1)
-        HDmemcpy(&(right_node_ptrs[0]), &(left_node_ptrs[mid_record + (unsigned)1]),
+        H5MM_memcpy(&(right_node_ptrs[0]), &(left_node_ptrs[mid_record + (unsigned)1]),
                 sizeof(H5B2_node_ptr_t) * (size_t)(old_node_nrec - mid_record));
 
     /* Copy "middle" record to internal node */
-    HDmemcpy(H5B2_INT_NREC(internal, hdr, idx), H5B2_NAT_NREC(left_native, hdr, mid_record), hdr->cls->nrec_size);
+    H5MM_memcpy(H5B2_INT_NREC(internal, hdr, idx), H5B2_NAT_NREC(left_native, hdr, mid_record), hdr->cls->nrec_size);
 
     /* Mark nodes as dirty */
     left_child_flags |= H5AC__DIRTIED_FLAG;
@@ -510,14 +510,14 @@ H5B2__redistribute2(H5B2_hdr_t *hdr, uint16_t depth, H5B2_internal_t *internal,
         uint16_t move_nrec = (uint16_t)(*right_nrec - new_right_nrec);      /* Number of records to move from right node to left */
 
         /* Copy record from parent node down into left child */
-        HDmemcpy(H5B2_NAT_NREC(left_native, hdr, *left_nrec), H5B2_INT_NREC(internal, hdr, idx), hdr->cls->nrec_size);
+        H5MM_memcpy(H5B2_NAT_NREC(left_native, hdr, *left_nrec), H5B2_INT_NREC(internal, hdr, idx), hdr->cls->nrec_size);
 
         /* See if we need to move records from right node */
         if(move_nrec > 1)
-            HDmemcpy(H5B2_NAT_NREC(left_native, hdr, (*left_nrec + 1)), H5B2_NAT_NREC(right_native, hdr, 0), hdr->cls->nrec_size * (size_t)(move_nrec - 1));
+            H5MM_memcpy(H5B2_NAT_NREC(left_native, hdr, (*left_nrec + 1)), H5B2_NAT_NREC(right_native, hdr, 0), hdr->cls->nrec_size * (size_t)(move_nrec - 1));
 
         /* Move record from right node into parent node */
-        HDmemcpy(H5B2_INT_NREC(internal, hdr, idx), H5B2_NAT_NREC(right_native, hdr, (move_nrec - 1)), hdr->cls->nrec_size);
+        H5MM_memcpy(H5B2_INT_NREC(internal, hdr, idx), H5B2_NAT_NREC(right_native, hdr, (move_nrec - 1)), hdr->cls->nrec_size);
 
         /* Slide records in right node down */
         HDmemmove(H5B2_NAT_NREC(right_native, hdr, 0), H5B2_NAT_NREC(right_native, hdr, move_nrec), hdr->cls->nrec_size * new_right_nrec);
@@ -534,7 +534,7 @@ H5B2__redistribute2(H5B2_hdr_t *hdr, uint16_t depth, H5B2_internal_t *internal,
             right_moved_nrec -= (hssize_t)moved_nrec;
 
             /* Copy node pointers from right node to left */
-            HDmemcpy(&(left_node_ptrs[*left_nrec + 1]), &(right_node_ptrs[0]), sizeof(H5B2_node_ptr_t) * move_nrec);
+            H5MM_memcpy(&(left_node_ptrs[*left_nrec + 1]), &(right_node_ptrs[0]), sizeof(H5B2_node_ptr_t) * move_nrec);
 
             /* Slide node pointers in right node down */
             HDmemmove(&(right_node_ptrs[0]), &(right_node_ptrs[move_nrec]), sizeof(H5B2_node_ptr_t) * (new_right_nrec + (unsigned)1));
@@ -569,14 +569,14 @@ H5B2__redistribute2(H5B2_hdr_t *hdr, uint16_t depth, H5B2_internal_t *internal,
                 hdr->cls->nrec_size * (*right_nrec));
 
         /* Copy record from parent node down into right child */
-        HDmemcpy(H5B2_NAT_NREC(right_native, hdr, (move_nrec - 1)), H5B2_INT_NREC(internal, hdr, idx), hdr->cls->nrec_size);
+        H5MM_memcpy(H5B2_NAT_NREC(right_native, hdr, (move_nrec - 1)), H5B2_INT_NREC(internal, hdr, idx), hdr->cls->nrec_size);
 
         /* See if we need to move records from left node */
         if(move_nrec > 1)
-            HDmemcpy(H5B2_NAT_NREC(right_native, hdr, 0), H5B2_NAT_NREC(left_native, hdr, ((*left_nrec - move_nrec) + 1)), hdr->cls->nrec_size * (size_t)(move_nrec - 1));
+            H5MM_memcpy(H5B2_NAT_NREC(right_native, hdr, 0), H5B2_NAT_NREC(left_native, hdr, ((*left_nrec - move_nrec) + 1)), hdr->cls->nrec_size * (size_t)(move_nrec - 1));
 
         /* Move record from left node into parent node */
-        HDmemcpy(H5B2_INT_NREC(internal, hdr, idx), H5B2_NAT_NREC(left_native, hdr, (*left_nrec - move_nrec)), hdr->cls->nrec_size);
+        H5MM_memcpy(H5B2_INT_NREC(internal, hdr, idx), H5B2_NAT_NREC(left_native, hdr, (*left_nrec - move_nrec)), hdr->cls->nrec_size);
 
         /* Handle node pointers, if we have an internal node */
         if(depth > 1) {
@@ -587,7 +587,7 @@ H5B2__redistribute2(H5B2_hdr_t *hdr, uint16_t depth, H5B2_internal_t *internal,
             HDmemmove(&(right_node_ptrs[move_nrec]), &(right_node_ptrs[0]), sizeof(H5B2_node_ptr_t) * (size_t)(*right_nrec + 1));
 
             /* Copy node pointers from left node to right */
-            HDmemcpy(&(right_node_ptrs[0]), &(left_node_ptrs[new_left_nrec + 1]), sizeof(H5B2_node_ptr_t) * move_nrec);
+            H5MM_memcpy(&(right_node_ptrs[0]), &(left_node_ptrs[new_left_nrec + 1]), sizeof(H5B2_node_ptr_t) * move_nrec);
 
             /* Count the number of records being moved */
             for(u = 0; u < move_nrec; u++)
@@ -775,16 +775,16 @@ H5B2__redistribute3(H5B2_hdr_t *hdr, uint16_t depth, H5B2_internal_t *internal,
             uint16_t moved_middle_nrec = 0;      /* Number of records moved into left node */
 
             /* Move left parent record down to left node */
-            HDmemcpy(H5B2_NAT_NREC(left_native, hdr, *left_nrec), H5B2_INT_NREC(internal, hdr, idx - 1), hdr->cls->nrec_size);
+            H5MM_memcpy(H5B2_NAT_NREC(left_native, hdr, *left_nrec), H5B2_INT_NREC(internal, hdr, idx - 1), hdr->cls->nrec_size);
 
             /* Move records from middle node into left node */
             if((new_left_nrec - 1) > *left_nrec) {
                 moved_middle_nrec = (uint16_t)(new_left_nrec - (*left_nrec + 1));
-                HDmemcpy(H5B2_NAT_NREC(left_native, hdr, *left_nrec + 1), H5B2_NAT_NREC(middle_native, hdr, 0), hdr->cls->nrec_size * moved_middle_nrec);
+                H5MM_memcpy(H5B2_NAT_NREC(left_native, hdr, *left_nrec + 1), H5B2_NAT_NREC(middle_native, hdr, 0), hdr->cls->nrec_size * moved_middle_nrec);
             } /* end if */
 
             /* Move record from middle node up to parent node */
-            HDmemcpy(H5B2_INT_NREC(internal, hdr, idx - 1), H5B2_NAT_NREC(middle_native, hdr, moved_middle_nrec), hdr->cls->nrec_size);
+            H5MM_memcpy(H5B2_INT_NREC(internal, hdr, idx - 1), H5B2_NAT_NREC(middle_native, hdr, moved_middle_nrec), hdr->cls->nrec_size);
             moved_middle_nrec++;
 
             /* Slide records in middle node down */
@@ -798,7 +798,7 @@ H5B2__redistribute3(H5B2_hdr_t *hdr, uint16_t depth, H5B2_internal_t *internal,
 
                 /* Move middle node pointers into left node */
                 move_nptrs = (unsigned)(new_left_nrec - *left_nrec);
-                HDmemcpy(&(left_node_ptrs[*left_nrec + 1]), &(middle_node_ptrs[0]), sizeof(H5B2_node_ptr_t)*move_nptrs);
+                H5MM_memcpy(&(left_node_ptrs[*left_nrec + 1]), &(middle_node_ptrs[0]), sizeof(H5B2_node_ptr_t)*move_nptrs);
 
                 /* Count the number of records being moved into the left node */
                 for(u = 0, moved_nrec = 0; u < move_nptrs; u++)
@@ -832,14 +832,14 @@ H5B2__redistribute3(H5B2_hdr_t *hdr, uint16_t depth, H5B2_internal_t *internal,
             HDmemmove(H5B2_NAT_NREC(right_native, hdr, right_nrec_move), H5B2_NAT_NREC(right_native, hdr, 0), hdr->cls->nrec_size * (*right_nrec));
 
             /* Move right parent record down to right node */
-            HDmemcpy(H5B2_NAT_NREC(right_native, hdr, right_nrec_move - 1), H5B2_INT_NREC(internal, hdr, idx), hdr->cls->nrec_size);
+            H5MM_memcpy(H5B2_NAT_NREC(right_native, hdr, right_nrec_move - 1), H5B2_INT_NREC(internal, hdr, idx), hdr->cls->nrec_size);
 
             /* Move records from middle node into right node */
             if(right_nrec_move > 1)
-                HDmemcpy(H5B2_NAT_NREC(right_native, hdr, 0), H5B2_NAT_NREC(middle_native, hdr, ((curr_middle_nrec - right_nrec_move) + 1)), hdr->cls->nrec_size * (right_nrec_move - 1));
+                H5MM_memcpy(H5B2_NAT_NREC(right_native, hdr, 0), H5B2_NAT_NREC(middle_native, hdr, ((curr_middle_nrec - right_nrec_move) + 1)), hdr->cls->nrec_size * (right_nrec_move - 1));
 
             /* Move record from middle node up to parent node */
-            HDmemcpy(H5B2_INT_NREC(internal, hdr, idx), H5B2_NAT_NREC(middle_native, hdr, (curr_middle_nrec - right_nrec_move)), hdr->cls->nrec_size);
+            H5MM_memcpy(H5B2_INT_NREC(internal, hdr, idx), H5B2_NAT_NREC(middle_native, hdr, (curr_middle_nrec - right_nrec_move)), hdr->cls->nrec_size);
 
             /* Move node pointers also if this is an internal node */
             if(depth > 1) {
@@ -850,7 +850,7 @@ H5B2__redistribute3(H5B2_hdr_t *hdr, uint16_t depth, H5B2_internal_t *internal,
                 HDmemmove(&(right_node_ptrs[right_nrec_move]), &(right_node_ptrs[0]), sizeof(H5B2_node_ptr_t) * (size_t)(*right_nrec + 1));
 
                 /* Move middle node pointers into right node */
-                HDmemcpy(&(right_node_ptrs[0]), &(middle_node_ptrs[(curr_middle_nrec - right_nrec_move) + 1]), sizeof(H5B2_node_ptr_t) * right_nrec_move);
+                H5MM_memcpy(&(right_node_ptrs[0]), &(middle_node_ptrs[(curr_middle_nrec - right_nrec_move) + 1]), sizeof(H5B2_node_ptr_t) * right_nrec_move);
 
                 /* Count the number of records being moved into the right node */
                 for(u = 0, moved_nrec = 0; u < right_nrec_move; u++)
@@ -881,14 +881,14 @@ H5B2__redistribute3(H5B2_hdr_t *hdr, uint16_t depth, H5B2_internal_t *internal,
             HDmemmove(H5B2_NAT_NREC(middle_native, hdr, left_nrec_move), H5B2_NAT_NREC(middle_native, hdr, 0), hdr->cls->nrec_size * curr_middle_nrec);
 
             /* Move left parent record down to middle node */
-            HDmemcpy(H5B2_NAT_NREC(middle_native, hdr, left_nrec_move - 1), H5B2_INT_NREC(internal, hdr, idx - 1), hdr->cls->nrec_size);
+            H5MM_memcpy(H5B2_NAT_NREC(middle_native, hdr, left_nrec_move - 1), H5B2_INT_NREC(internal, hdr, idx - 1), hdr->cls->nrec_size);
 
             /* Move left records to middle node */
             if(left_nrec_move > 1)
                 HDmemmove(H5B2_NAT_NREC(middle_native, hdr, 0), H5B2_NAT_NREC(left_native, hdr, new_left_nrec + 1), hdr->cls->nrec_size * (left_nrec_move - 1));
 
             /* Move left parent record up from left node */
-            HDmemcpy(H5B2_INT_NREC(internal, hdr, idx - 1), H5B2_NAT_NREC(left_native, hdr, new_left_nrec), hdr->cls->nrec_size);
+            H5MM_memcpy(H5B2_INT_NREC(internal, hdr, idx - 1), H5B2_NAT_NREC(left_native, hdr, new_left_nrec), hdr->cls->nrec_size);
 
             /* Move node pointers also if this is an internal node */
             if(depth > 1) {
@@ -899,7 +899,7 @@ H5B2__redistribute3(H5B2_hdr_t *hdr, uint16_t depth, H5B2_internal_t *internal,
                 HDmemmove(&(middle_node_ptrs[left_nrec_move]), &(middle_node_ptrs[0]), sizeof(H5B2_node_ptr_t) * (size_t)(curr_middle_nrec + 1));
 
                 /* Move left node pointers into middle node */
-                HDmemcpy(&(middle_node_ptrs[0]), &(left_node_ptrs[new_left_nrec + 1]), sizeof(H5B2_node_ptr_t) * left_nrec_move);
+                H5MM_memcpy(&(middle_node_ptrs[0]), &(left_node_ptrs[new_left_nrec + 1]), sizeof(H5B2_node_ptr_t) * left_nrec_move);
 
                 /* Count the number of records being moved into the left node */
                 for(u = 0, moved_nrec = 0; u < left_nrec_move; u++)
@@ -927,13 +927,13 @@ H5B2__redistribute3(H5B2_hdr_t *hdr, uint16_t depth, H5B2_internal_t *internal,
             unsigned right_nrec_move = (unsigned)(*right_nrec - new_right_nrec); /* Number of records to move out of right node */
 
             /* Move right parent record down to middle node */
-            HDmemcpy(H5B2_NAT_NREC(middle_native, hdr, curr_middle_nrec), H5B2_INT_NREC(internal, hdr, idx), hdr->cls->nrec_size);
+            H5MM_memcpy(H5B2_NAT_NREC(middle_native, hdr, curr_middle_nrec), H5B2_INT_NREC(internal, hdr, idx), hdr->cls->nrec_size);
 
             /* Move right records to middle node */
             HDmemmove(H5B2_NAT_NREC(middle_native, hdr, (curr_middle_nrec + 1)), H5B2_NAT_NREC(right_native, hdr, 0), hdr->cls->nrec_size * (right_nrec_move - 1));
 
             /* Move right parent record up from right node */
-            HDmemcpy(H5B2_INT_NREC(internal, hdr, idx), H5B2_NAT_NREC(right_native, hdr, right_nrec_move - 1), hdr->cls->nrec_size);
+            H5MM_memcpy(H5B2_INT_NREC(internal, hdr, idx), H5B2_NAT_NREC(right_native, hdr, right_nrec_move - 1), hdr->cls->nrec_size);
 
             /* Slide right records down */
             HDmemmove(H5B2_NAT_NREC(right_native, hdr, 0), H5B2_NAT_NREC(right_native, hdr, right_nrec_move), hdr->cls->nrec_size * new_right_nrec);
@@ -944,7 +944,7 @@ H5B2__redistribute3(H5B2_hdr_t *hdr, uint16_t depth, H5B2_internal_t *internal,
                 unsigned u;             /* Local index variable */
 
                 /* Move right node pointers into middle node */
-                HDmemcpy(&(middle_node_ptrs[curr_middle_nrec + 1]), &(right_node_ptrs[0]), sizeof(H5B2_node_ptr_t) * right_nrec_move);
+                H5MM_memcpy(&(middle_node_ptrs[curr_middle_nrec + 1]), &(right_node_ptrs[0]), sizeof(H5B2_node_ptr_t) * right_nrec_move);
 
                 /* Count the number of records being moved into the right node */
                 for(u = 0, moved_nrec = 0; u < right_nrec_move; u++)
@@ -1113,14 +1113,14 @@ H5B2__merge2(H5B2_hdr_t *hdr, uint16_t depth, H5B2_node_ptr_t *curr_node_ptr,
     /* Redistribute records into left node */
     {
         /* Copy record from parent node to proper location */
-        HDmemcpy(H5B2_NAT_NREC(left_native, hdr, *left_nrec), H5B2_INT_NREC(internal, hdr, idx), hdr->cls->nrec_size);
+        H5MM_memcpy(H5B2_NAT_NREC(left_native, hdr, *left_nrec), H5B2_INT_NREC(internal, hdr, idx), hdr->cls->nrec_size);
 
         /* Copy records from right node to left node */
-        HDmemcpy(H5B2_NAT_NREC(left_native, hdr, *left_nrec + 1), H5B2_NAT_NREC(right_native, hdr, 0), hdr->cls->nrec_size * (*right_nrec));
+        H5MM_memcpy(H5B2_NAT_NREC(left_native, hdr, *left_nrec + 1), H5B2_NAT_NREC(right_native, hdr, 0), hdr->cls->nrec_size * (*right_nrec));
 
         /* Copy node pointers from right node into left node */
         if(depth > 1)
-            HDmemcpy(&(left_node_ptrs[*left_nrec + 1]), &(right_node_ptrs[0]), sizeof(H5B2_node_ptr_t) * (size_t)(*right_nrec + 1));
+            H5MM_memcpy(&(left_node_ptrs[*left_nrec + 1]), &(right_node_ptrs[0]), sizeof(H5B2_node_ptr_t) * (size_t)(*right_nrec + 1));
 
         /* Update flush dependencies for grandchildren, if using SWMR */
         if(hdr->swmr_write && depth > 1)
@@ -1304,13 +1304,13 @@ H5B2__merge3(H5B2_hdr_t *hdr, uint16_t depth, H5B2_node_ptr_t *curr_node_ptr,
         middle_moved_nrec = middle_nrec_move;
 
         /* Copy record from parent node to proper location in left node */
-        HDmemcpy(H5B2_NAT_NREC(left_native, hdr, *left_nrec), H5B2_INT_NREC(internal, hdr, idx - 1), hdr->cls->nrec_size);
+        H5MM_memcpy(H5B2_NAT_NREC(left_native, hdr, *left_nrec), H5B2_INT_NREC(internal, hdr, idx - 1), hdr->cls->nrec_size);
 
         /* Copy records from middle node to left node */
-        HDmemcpy(H5B2_NAT_NREC(left_native, hdr, *left_nrec + 1), H5B2_NAT_NREC(middle_native, hdr, 0), hdr->cls->nrec_size * (middle_nrec_move - 1));
+        H5MM_memcpy(H5B2_NAT_NREC(left_native, hdr, *left_nrec + 1), H5B2_NAT_NREC(middle_native, hdr, 0), hdr->cls->nrec_size * (middle_nrec_move - 1));
 
         /* Copy record from middle node to proper location in parent node */
-        HDmemcpy(H5B2_INT_NREC(internal, hdr, idx - 1), H5B2_NAT_NREC(middle_native, hdr, (middle_nrec_move - 1)), hdr->cls->nrec_size);
+        H5MM_memcpy(H5B2_INT_NREC(internal, hdr, idx - 1), H5B2_NAT_NREC(middle_native, hdr, (middle_nrec_move - 1)), hdr->cls->nrec_size);
 
         /* Slide records in middle node down */
         HDmemmove(H5B2_NAT_NREC(middle_native, hdr, 0), H5B2_NAT_NREC(middle_native, hdr, middle_nrec_move), hdr->cls->nrec_size * (*middle_nrec - middle_nrec_move));
@@ -1320,7 +1320,7 @@ H5B2__merge3(H5B2_hdr_t *hdr, uint16_t depth, H5B2_node_ptr_t *curr_node_ptr,
             unsigned u;         /* Local index variable */
 
             /* Copy node pointers from middle node into left node */
-            HDmemcpy(&(left_node_ptrs[*left_nrec + 1]), &(middle_node_ptrs[0]), sizeof(H5B2_node_ptr_t) * middle_nrec_move);
+            H5MM_memcpy(&(left_node_ptrs[*left_nrec + 1]), &(middle_node_ptrs[0]), sizeof(H5B2_node_ptr_t) * middle_nrec_move);
 
             /* Count the number of records being moved into the left node */
             for(u = 0; u < middle_nrec_move; u++)
@@ -1348,15 +1348,15 @@ H5B2__merge3(H5B2_hdr_t *hdr, uint16_t depth, H5B2_node_ptr_t *curr_node_ptr,
     /* Redistribute records into middle node */
     {
         /* Copy record from parent node to proper location in middle node */
-        HDmemcpy(H5B2_NAT_NREC(middle_native, hdr, *middle_nrec), H5B2_INT_NREC(internal, hdr, idx), hdr->cls->nrec_size);
+        H5MM_memcpy(H5B2_NAT_NREC(middle_native, hdr, *middle_nrec), H5B2_INT_NREC(internal, hdr, idx), hdr->cls->nrec_size);
 
         /* Copy records from right node to middle node */
-        HDmemcpy(H5B2_NAT_NREC(middle_native, hdr, *middle_nrec + 1), H5B2_NAT_NREC(right_native, hdr, 0), hdr->cls->nrec_size * (*right_nrec));
+        H5MM_memcpy(H5B2_NAT_NREC(middle_native, hdr, *middle_nrec + 1), H5B2_NAT_NREC(right_native, hdr, 0), hdr->cls->nrec_size * (*right_nrec));
 
         /* Move node pointers also if this is an internal node */
         if(depth > 1)
             /* Copy node pointers from right node into middle node */
-            HDmemcpy(&(middle_node_ptrs[*middle_nrec + 1]), &(right_node_ptrs[0]), sizeof(H5B2_node_ptr_t) * (size_t)(*right_nrec + 1));
+            H5MM_memcpy(&(middle_node_ptrs[*middle_nrec + 1]), &(right_node_ptrs[0]), sizeof(H5B2_node_ptr_t) * (size_t)(*right_nrec + 1));
 
         /* Update flush dependencies for grandchildren, if using SWMR */
         if(hdr->swmr_write && depth > 1)
@@ -1539,7 +1539,7 @@ H5B2__iterate_node(H5B2_hdr_t *hdr, uint16_t depth, const H5B2_node_ptr_t *curr_
             HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for B-tree internal node pointers")
 
         /* Copy the node pointers */
-        HDmemcpy(node_ptrs, internal->node_ptrs, (sizeof(H5B2_node_ptr_t) * (size_t)(curr_node->node_nrec + 1)));
+        H5MM_memcpy(node_ptrs, internal->node_ptrs, (sizeof(H5B2_node_ptr_t) * (size_t)(curr_node->node_nrec + 1)));
     } /* end if */
     else {
         H5B2_leaf_t *leaf;             /* Pointer to leaf node */
@@ -1559,7 +1559,7 @@ H5B2__iterate_node(H5B2_hdr_t *hdr, uint16_t depth, const H5B2_node_ptr_t *curr_
         HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for B-tree internal native keys")
 
     /* Copy the native keys */
-    HDmemcpy(native, node_native, (hdr->cls->nrec_size * curr_node->node_nrec));
+    H5MM_memcpy(native, node_native, (hdr->cls->nrec_size * curr_node->node_nrec));
 
     /* Unlock the node */
     if(H5AC_unprotect(hdr->f, curr_node_class, curr_node->addr, node, (unsigned)(hdr->swmr_write ? H5AC__PIN_ENTRY_FLAG : H5AC__NO_FLAGS_SET)) < 0)
diff --git a/src/H5B2leaf.c b/src/H5B2leaf.c
index 54d40ea..beca40c 100644
--- a/src/H5B2leaf.c
+++ b/src/H5B2leaf.c
@@ -412,7 +412,7 @@ H5B2__insert_leaf(H5B2_hdr_t *hdr, H5B2_node_ptr_t *curr_node_ptr,
                 if(hdr->min_native_rec == NULL)
                     if(NULL == (hdr->min_native_rec = H5MM_malloc(hdr->cls->nrec_size)))
                         HGOTO_ERROR(H5E_BTREE, H5E_CANTALLOC, FAIL, "memory allocation failed for v2 B-tree min record info")
-                HDmemcpy(hdr->min_native_rec, H5B2_LEAF_NREC(leaf, hdr, idx), hdr->cls->nrec_size);
+                H5MM_memcpy(hdr->min_native_rec, H5B2_LEAF_NREC(leaf, hdr, idx), hdr->cls->nrec_size);
             } /* end if */
         } /* end if */
         if(idx == (unsigned)(leaf->nrec - 1)) {
@@ -420,7 +420,7 @@ H5B2__insert_leaf(H5B2_hdr_t *hdr, H5B2_node_ptr_t *curr_node_ptr,
                 if(hdr->max_native_rec == NULL)
                     if(NULL == (hdr->max_native_rec = H5MM_malloc(hdr->cls->nrec_size)))
                         HGOTO_ERROR(H5E_BTREE, H5E_CANTALLOC, FAIL, "memory allocation failed for v2 B-tree max record info")
-                HDmemcpy(hdr->max_native_rec, H5B2_LEAF_NREC(leaf, hdr, idx), hdr->cls->nrec_size);
+                H5MM_memcpy(hdr->max_native_rec, H5B2_LEAF_NREC(leaf, hdr, idx), hdr->cls->nrec_size);
             } /* end if */
         } /* end if */
     } /* end if */
@@ -561,7 +561,7 @@ H5B2__update_leaf(H5B2_hdr_t *hdr, H5B2_node_ptr_t *curr_node_ptr,
                 if(hdr->min_native_rec == NULL)
                     if(NULL == (hdr->min_native_rec = H5MM_malloc(hdr->cls->nrec_size)))
                         HGOTO_ERROR(H5E_BTREE, H5E_CANTALLOC, FAIL, "memory allocation failed for v2 B-tree min record info")
-                HDmemcpy(hdr->min_native_rec, H5B2_LEAF_NREC(leaf, hdr, idx), hdr->cls->nrec_size);
+                H5MM_memcpy(hdr->min_native_rec, H5B2_LEAF_NREC(leaf, hdr, idx), hdr->cls->nrec_size);
             } /* end if */
         } /* end if */
         if(idx == (unsigned)(leaf->nrec - 1)) {
@@ -569,7 +569,7 @@ H5B2__update_leaf(H5B2_hdr_t *hdr, H5B2_node_ptr_t *curr_node_ptr,
                 if(hdr->max_native_rec == NULL)
                     if(NULL == (hdr->max_native_rec = H5MM_malloc(hdr->cls->nrec_size)))
                         HGOTO_ERROR(H5E_BTREE, H5E_CANTALLOC, FAIL, "memory allocation failed for v2 B-tree max record info")
-                HDmemcpy(hdr->max_native_rec, H5B2_LEAF_NREC(leaf, hdr, idx), hdr->cls->nrec_size);
+                H5MM_memcpy(hdr->max_native_rec, H5B2_LEAF_NREC(leaf, hdr, idx), hdr->cls->nrec_size);
             } /* end if */
         } /* end if */
     } /* end if */
@@ -664,9 +664,9 @@ H5B2__swap_leaf(H5B2_hdr_t *hdr, uint16_t depth, H5B2_internal_t *internal,
     } /* end else */
 
     /* Swap records (use disk page as temporary buffer) */
-    HDmemcpy(hdr->page, H5B2_NAT_NREC(child_native, hdr, 0), hdr->cls->nrec_size);
-    HDmemcpy(H5B2_NAT_NREC(child_native, hdr, 0), swap_loc, hdr->cls->nrec_size);
-    HDmemcpy(swap_loc, hdr->page, hdr->cls->nrec_size);
+    H5MM_memcpy(hdr->page, H5B2_NAT_NREC(child_native, hdr, 0), hdr->cls->nrec_size);
+    H5MM_memcpy(H5B2_NAT_NREC(child_native, hdr, 0), swap_loc, hdr->cls->nrec_size);
+    H5MM_memcpy(swap_loc, hdr->page, hdr->cls->nrec_size);
 
     /* Mark parent as dirty */
     *internal_flags_ptr |= H5AC__DIRTIED_FLAG;
diff --git a/src/H5Bcache.c b/src/H5Bcache.c
index a0a75c8..cce10c9 100644
--- a/src/H5Bcache.c
+++ b/src/H5Bcache.c
@@ -304,7 +304,7 @@ H5B__cache_serialize(const H5F_t *f, void *_image, size_t H5_ATTR_UNUSED len,
     HDassert(shared->type->encode);
 
     /* magic number */
-    HDmemcpy(image, H5B_MAGIC, (size_t)H5_SIZEOF_MAGIC);
+    H5MM_memcpy(image, H5B_MAGIC, (size_t)H5_SIZEOF_MAGIC);
     image += 4;
 
     /* node type and level */
diff --git a/src/H5C.c b/src/H5C.c
index 09c5fe8..ad2f762 100644
--- a/src/H5C.c
+++ b/src/H5C.c
@@ -2285,7 +2285,7 @@ H5C_protect(H5F_t *		f,
                     if(NULL == (entry_ptr->image_ptr = H5MM_malloc(entry_ptr->size + H5C_IMAGE_EXTRA_SPACE)))
                         HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, NULL, "memory allocation failed for on disk image buffer")
 #if H5C_DO_MEMORY_SANITY_CHECKS
-                    HDmemcpy(((uint8_t *)entry_ptr->image_ptr) + entry_ptr->size, H5C_IMAGE_SANITY_VALUE, H5C_IMAGE_EXTRA_SPACE);
+                    H5MM_memcpy(((uint8_t *)entry_ptr->image_ptr) + entry_ptr->size, H5C_IMAGE_SANITY_VALUE, H5C_IMAGE_EXTRA_SPACE);
 #endif /* H5C_DO_MEMORY_SANITY_CHECKS */
                     if(0 == mpi_rank)
                         if(H5C__generate_image(f, cache_ptr, entry_ptr) < 0)
@@ -6042,7 +6042,7 @@ H5C__flush_single_entry(H5F_t *f, H5C_cache_entry_t *entry_ptr, unsigned flags)
             if(NULL == (entry_ptr->image_ptr = H5MM_malloc(entry_ptr->size + H5C_IMAGE_EXTRA_SPACE)))
                 HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, FAIL, "memory allocation failed for on disk image buffer")
 #if H5C_DO_MEMORY_SANITY_CHECKS
-            HDmemcpy(((uint8_t *)entry_ptr->image_ptr) + entry_ptr->size, H5C_IMAGE_SANITY_VALUE, H5C_IMAGE_EXTRA_SPACE);
+            H5MM_memcpy(((uint8_t *)entry_ptr->image_ptr) + entry_ptr->size, H5C_IMAGE_SANITY_VALUE, H5C_IMAGE_EXTRA_SPACE);
 #endif /* H5C_DO_MEMORY_SANITY_CHECKS */
         } /* end if */
 
@@ -6542,7 +6542,7 @@ H5C_load_entry(H5F_t *              f,
     if(NULL == (image = (uint8_t *)H5MM_malloc(len + H5C_IMAGE_EXTRA_SPACE)))
         HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, NULL, "memory allocation failed for on disk image buffer")
 #if H5C_DO_MEMORY_SANITY_CHECKS
-    HDmemcpy(image + len, H5C_IMAGE_SANITY_VALUE, H5C_IMAGE_EXTRA_SPACE);
+    H5MM_memcpy(image + len, H5C_IMAGE_SANITY_VALUE, H5C_IMAGE_EXTRA_SPACE);
 #endif /* H5C_DO_MEMORY_SANITY_CHECKS */
 
 #ifdef H5_HAVE_PARALLEL
@@ -6580,7 +6580,7 @@ H5C_load_entry(H5F_t *              f,
                     HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, NULL, "image null after H5MM_realloc()")
                 image = (uint8_t *)new_image;
 #if H5C_DO_MEMORY_SANITY_CHECKS
-                HDmemcpy(image + len, H5C_IMAGE_SANITY_VALUE, H5C_IMAGE_EXTRA_SPACE);
+                H5MM_memcpy(image + len, H5C_IMAGE_SANITY_VALUE, H5C_IMAGE_EXTRA_SPACE);
 #endif /* H5C_DO_MEMORY_SANITY_CHECKS */
             } /* end if */
 
@@ -6624,7 +6624,7 @@ H5C_load_entry(H5F_t *              f,
                         HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, NULL, "image null after H5MM_realloc()")
                     image = (uint8_t *)new_image;
 #if H5C_DO_MEMORY_SANITY_CHECKS
-                    HDmemcpy(image + actual_len, H5C_IMAGE_SANITY_VALUE, H5C_IMAGE_EXTRA_SPACE);
+                    H5MM_memcpy(image + actual_len, H5C_IMAGE_SANITY_VALUE, H5C_IMAGE_EXTRA_SPACE);
 #endif /* H5C_DO_MEMORY_SANITY_CHECKS */
 
                     if(actual_len > len) {
@@ -8456,7 +8456,7 @@ H5C__serialize_single_entry(H5F_t *f, H5C_t *cache_ptr, H5C_cache_entry_t *entry
         if(NULL == (entry_ptr->image_ptr = H5MM_malloc(entry_ptr->size + H5C_IMAGE_EXTRA_SPACE)) )
             HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, FAIL, "memory allocation failed for on disk image buffer")
 #if H5C_DO_MEMORY_SANITY_CHECKS
-        HDmemcpy(((uint8_t *)entry_ptr->image_ptr) + image_size, H5C_IMAGE_SANITY_VALUE, H5C_IMAGE_EXTRA_SPACE);
+        H5MM_memcpy(((uint8_t *)entry_ptr->image_ptr) + image_size, H5C_IMAGE_SANITY_VALUE, H5C_IMAGE_EXTRA_SPACE);
 #endif /* H5C_DO_MEMORY_SANITY_CHECKS */
     } /* end if */
 
@@ -8573,7 +8573,7 @@ H5C__generate_image(H5F_t *f, H5C_t *cache_ptr, H5C_cache_entry_t *entry_ptr)
             if(NULL == (entry_ptr->image_ptr = H5MM_realloc(entry_ptr->image_ptr, new_len + H5C_IMAGE_EXTRA_SPACE)))
                 HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, FAIL, "memory allocation failed for on disk image buffer")
 #if H5C_DO_MEMORY_SANITY_CHECKS
-            HDmemcpy(((uint8_t *)entry_ptr->image_ptr) + new_len, H5C_IMAGE_SANITY_VALUE, H5C_IMAGE_EXTRA_SPACE);
+            H5MM_memcpy(((uint8_t *)entry_ptr->image_ptr) + new_len, H5C_IMAGE_SANITY_VALUE, H5C_IMAGE_EXTRA_SPACE);
 #endif /* H5C_DO_MEMORY_SANITY_CHECKS */
 
             /* Update statistics for resizing the entry */
diff --git a/src/H5CX.c b/src/H5CX.c
index b56d66d..5a0934a 100644
--- a/src/H5CX.c
+++ b/src/H5CX.c
@@ -76,7 +76,7 @@
 #define H5CX_RETRIEVE_PROP_COMMON(PL, DEF_PL, PROP_NAME, PROP_FIELD)          \
     /* Check for default property list */                                     \
     if((*head)->ctx.H5_GLUE(PL,_id) == (DEF_PL))                              \
-        HDmemcpy(&(*head)->ctx.PROP_FIELD, &H5_GLUE3(H5CX_def_,PL,_cache).PROP_FIELD, sizeof(H5_GLUE3(H5CX_def_,PL,_cache).PROP_FIELD)); \
+        H5MM_memcpy(&(*head)->ctx.PROP_FIELD, &H5_GLUE3(H5CX_def_,PL,_cache).PROP_FIELD, sizeof(H5_GLUE3(H5CX_def_,PL,_cache).PROP_FIELD)); \
     else {                                                                    \
         /* Retrieve the property list */                                      \
         H5CX_RETRIEVE_PLIST(PL, FAIL)                                         \
@@ -776,7 +776,7 @@ H5CX_retrieve_state(H5CX_state_t **api_state)
     /* Keep a copy of the VOL connector property, if there is one */
     if((*head)->ctx.vol_connector_prop_valid && (*head)->ctx.vol_connector_prop.connector_id > 0) {
         /* Get the connector property */
-        HDmemcpy(&(*api_state)->vol_connector_prop, &(*head)->ctx.vol_connector_prop, sizeof(H5VL_connector_prop_t));
+        H5MM_memcpy(&(*api_state)->vol_connector_prop, &(*head)->ctx.vol_connector_prop, sizeof(H5VL_connector_prop_t));
 
         /* Check for actual VOL connector property */
         if((*api_state)->vol_connector_prop.connector_id) {
@@ -852,7 +852,7 @@ H5CX_restore_state(const H5CX_state_t *api_state)
 
     /* Restore the VOL connector info */
     if(api_state->vol_connector_prop.connector_id) {
-        HDmemcpy(&(*head)->ctx.vol_connector_prop, &api_state->vol_connector_prop, sizeof(H5VL_connector_prop_t));
+        H5MM_memcpy(&(*head)->ctx.vol_connector_prop, &api_state->vol_connector_prop, sizeof(H5VL_connector_prop_t));
         (*head)->ctx.vol_connector_prop_valid = TRUE;
     } /* end if */
 
@@ -1271,7 +1271,7 @@ H5CX_set_vol_connector_prop(const H5VL_connector_prop_t *vol_connector_prop)
     HDassert(head && *head);
 
     /* Set the API context value */
-    HDmemcpy(&(*head)->ctx.vol_connector_prop, vol_connector_prop, sizeof(H5VL_connector_prop_t));
+    H5MM_memcpy(&(*head)->ctx.vol_connector_prop, vol_connector_prop, sizeof(H5VL_connector_prop_t));
 
     /* Mark the value as valid */
     (*head)->ctx.vol_connector_prop_valid = TRUE;
@@ -1396,7 +1396,7 @@ H5CX_get_vol_connector_prop(H5VL_connector_prop_t *vol_connector_prop)
     /* Check for value that was set */
     if((*head)->ctx.vol_connector_prop_valid)
         /* Get the value */
-        HDmemcpy(vol_connector_prop, &(*head)->ctx.vol_connector_prop, sizeof(H5VL_connector_prop_t));
+        H5MM_memcpy(vol_connector_prop, &(*head)->ctx.vol_connector_prop, sizeof(H5VL_connector_prop_t));
     else
         HDmemset(vol_connector_prop, 0, sizeof(H5VL_connector_prop_t));
 
@@ -1601,7 +1601,7 @@ H5CX_get_btree_split_ratios(double split_ratio[3])
     H5CX_RETRIEVE_PROP_VALID(dxpl, H5P_DATASET_XFER_DEFAULT, H5D_XFER_BTREE_SPLIT_RATIO_NAME, btree_split_ratio)
 
     /* Get the B-tree split ratio values */
-    HDmemcpy(split_ratio, &(*head)->ctx.btree_split_ratio, sizeof((*head)->ctx.btree_split_ratio));
+    H5MM_memcpy(split_ratio, &(*head)->ctx.btree_split_ratio, sizeof((*head)->ctx.btree_split_ratio));
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
diff --git a/src/H5Cimage.c b/src/H5Cimage.c
index 4684630..db44c7a 100644
--- a/src/H5Cimage.c
+++ b/src/H5Cimage.c
@@ -2020,11 +2020,11 @@ H5C__decode_cache_image_entry(const H5F_t *f, const H5C_t *cache_ptr,
 	HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, FAIL, "memory allocation failed for on disk image buffer")
 
 #if H5C_DO_MEMORY_SANITY_CHECKS
-    HDmemcpy(((uint8_t *)image_ptr) + size, H5C_IMAGE_SANITY_VALUE, H5C_IMAGE_EXTRA_SPACE);
+    H5MM_memcpy(((uint8_t *)image_ptr) + size, H5C_IMAGE_SANITY_VALUE, H5C_IMAGE_EXTRA_SPACE);
 #endif /* H5C_DO_MEMORY_SANITY_CHECKS */
 
     /* Copy the entry image from the cache image block */
-    HDmemcpy(image_ptr, p, size);
+    H5MM_memcpy(image_ptr, p, size);
     p += size;
 
     /* Copy data into target */
@@ -2219,7 +2219,7 @@ H5C__encode_cache_image_header(const H5F_t *f, const H5C_t *cache_ptr,
     p = *buf;
 
     /* write signature */
-    HDmemcpy(p, H5C__MDCI_BLOCK_SIGNATURE, (size_t)H5C__MDCI_BLOCK_SIGNATURE_LEN);
+    H5MM_memcpy(p, H5C__MDCI_BLOCK_SIGNATURE, (size_t)H5C__MDCI_BLOCK_SIGNATURE_LEN);
     p += H5C__MDCI_BLOCK_SIGNATURE_LEN;
 
     /* write version */
@@ -2355,7 +2355,7 @@ H5C__encode_cache_image_entry(H5F_t *f, H5C_t *cache_ptr, uint8_t **buf,
 	H5F_addr_encode(f, &p, ie_ptr->fd_parent_addrs[u]);
 
     /* Copy entry image */
-    HDmemcpy(p, ie_ptr->image_ptr, ie_ptr->size);
+    H5MM_memcpy(p, ie_ptr->image_ptr, ie_ptr->size);
     p += ie_ptr->size;
 
     /* Update buffer pointer */
@@ -3422,11 +3422,11 @@ H5C__reconstruct_cache_entry(const H5F_t *f, H5C_t *cache_ptr,
     if(NULL == (pf_entry_ptr->image_ptr = H5MM_malloc(pf_entry_ptr->size + H5C_IMAGE_EXTRA_SPACE)))
 	HGOTO_ERROR(H5E_CACHE, H5E_CANTALLOC, NULL, "memory allocation failed for on disk image buffer")
 #if H5C_DO_MEMORY_SANITY_CHECKS
-    HDmemcpy(((uint8_t *)pf_entry_ptr->image_ptr) + size, H5C_IMAGE_SANITY_VALUE, H5C_IMAGE_EXTRA_SPACE);
+    H5MM_memcpy(((uint8_t *)pf_entry_ptr->image_ptr) + size, H5C_IMAGE_SANITY_VALUE, H5C_IMAGE_EXTRA_SPACE);
 #endif /* H5C_DO_MEMORY_SANITY_CHECKS */
 
     /* Copy the entry image from the cache image block */
-    HDmemcpy(pf_entry_ptr->image_ptr, p, pf_entry_ptr->size);
+    H5MM_memcpy(pf_entry_ptr->image_ptr, p, pf_entry_ptr->size);
     p += pf_entry_ptr->size;
 
     /* Initialize the rest of the fields in the prefetched entry */
diff --git a/src/H5Dbtree.c b/src/H5Dbtree.c
index b61aed4..e6f0674 100644
--- a/src/H5Dbtree.c
+++ b/src/H5Dbtree.c
@@ -847,7 +847,7 @@ H5D__btree_shared_create(const H5F_t *f, H5O_storage_chunk_t *store,
     /* Set up the "local" information for this dataset's chunks */
     if(NULL == (my_layout = H5FL_MALLOC(H5O_layout_chunk_t)))
         HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "can't allocate chunk layout")
-    HDmemcpy(my_layout, layout, sizeof(H5O_layout_chunk_t));
+    H5MM_memcpy(my_layout, layout, sizeof(H5O_layout_chunk_t));
     shared->udata = my_layout;
 
     /* Make shared B-tree info reference counted */
@@ -1087,7 +1087,7 @@ H5D__btree_idx_iterate_cb(H5F_t H5_ATTR_UNUSED *f, const void *_lt_key,
     HDcompile_assert(sizeof(chunk_rec.filter_mask) == sizeof(lt_key->filter_mask));
 
     /* Compose generic chunk record for callback */
-    HDmemcpy(&chunk_rec, lt_key, sizeof(*lt_key));
+    H5MM_memcpy(&chunk_rec, lt_key, sizeof(*lt_key));
     chunk_rec.chunk_addr = addr;
 
     /* Make "generic chunk" callback */
diff --git a/src/H5Dbtree2.c b/src/H5Dbtree2.c
index b32f395..f0a1380 100644
--- a/src/H5Dbtree2.c
+++ b/src/H5Dbtree2.c
@@ -248,7 +248,7 @@ H5D__bt2_crt_context(void *_udata)
     /* Set up the "local" information for this dataset's chunk dimension sizes */
     if(NULL == (my_dim = (uint32_t *)H5FL_BLK_MALLOC(chunk_dim, H5O_LAYOUT_NDIMS * sizeof(uint32_t))))
         HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, NULL, "can't allocate chunk dims")
-    HDmemcpy(my_dim, udata->dim, H5O_LAYOUT_NDIMS * sizeof(uint32_t));
+    H5MM_memcpy(my_dim, udata->dim, H5O_LAYOUT_NDIMS * sizeof(uint32_t));
     ctx->dim = my_dim;
 
     /* 
diff --git a/src/H5Dchunk.c b/src/H5Dchunk.c
index 27a6125..93b4427 100644
--- a/src/H5Dchunk.c
+++ b/src/H5Dchunk.c
@@ -1688,7 +1688,7 @@ H5D__create_chunk_file_map_hyper(H5D_chunk_map_t *fm, const H5D_io_info_t
             new_chunk_info->mspace_shared = FALSE;
 
             /* Copy the chunk's scaled coordinates */
-	    HDmemcpy(new_chunk_info->scaled, scaled, sizeof(hsize_t) * fm->f_ndims);
+	    H5MM_memcpy(new_chunk_info->scaled, scaled, sizeof(hsize_t) * fm->f_ndims);
             new_chunk_info->scaled[fm->f_ndims] = 0;
 
             /* Insert the new chunk into the skip list */
@@ -1948,9 +1948,9 @@ H5D__chunk_file_cb(void H5_ATTR_UNUSED *elem, const H5T_t H5_ATTR_UNUSED *type,
             chunk_info->chunk_points = 0;
 
             /* Set the chunk's scaled coordinates */
-            HDmemcpy(chunk_info->scaled, scaled, sizeof(hsize_t) * fm->f_ndims);
+            H5MM_memcpy(chunk_info->scaled, scaled, sizeof(hsize_t) * fm->f_ndims);
             chunk_info->scaled[fm->f_ndims] = 0;
-            HDmemcpy(chunk_info->scaled, scaled, sizeof(hsize_t) * fm->f_ndims);
+            H5MM_memcpy(chunk_info->scaled, scaled, sizeof(hsize_t) * fm->f_ndims);
 
             /* Insert the new chunk into the skip list */
             if(H5SL_insert(fm->sel_chunks,chunk_info,&chunk_info->index) < 0) {
@@ -2191,11 +2191,11 @@ H5D__chunk_read(H5D_io_info_t *io_info, const H5D_type_info_t *type_info,
     HDassert(fm);
 
     /* Set up "nonexistent" I/O info object */
-    HDmemcpy(&nonexistent_io_info, io_info, sizeof(nonexistent_io_info));
+    H5MM_memcpy(&nonexistent_io_info, io_info, sizeof(nonexistent_io_info));
     nonexistent_io_info.layout_ops = *H5D_LOPS_NONEXISTENT;
 
     /* Set up contiguous I/O info object */
-    HDmemcpy(&ctg_io_info, io_info, sizeof(ctg_io_info));
+    H5MM_memcpy(&ctg_io_info, io_info, sizeof(ctg_io_info));
     ctg_io_info.store = &ctg_store;
     ctg_io_info.layout_ops = *H5D_LOPS_CONTIG;
 
@@ -2203,7 +2203,7 @@ H5D__chunk_read(H5D_io_info_t *io_info, const H5D_type_info_t *type_info,
     H5_CHECKED_ASSIGN(ctg_store.contig.dset_size, hsize_t, io_info->dset->shared->layout.u.chunk.size, uint32_t);
 
     /* Set up compact I/O info object */
-    HDmemcpy(&cpt_io_info, io_info, sizeof(cpt_io_info));
+    H5MM_memcpy(&cpt_io_info, io_info, sizeof(cpt_io_info));
     cpt_io_info.store = &cpt_store;
     cpt_io_info.layout_ops = *H5D_LOPS_COMPACT;
 
@@ -2341,7 +2341,7 @@ H5D__chunk_write(H5D_io_info_t *io_info, const H5D_type_info_t *type_info,
     HDassert(fm);
 
     /* Set up contiguous I/O info object */
-    HDmemcpy(&ctg_io_info, io_info, sizeof(ctg_io_info));
+    H5MM_memcpy(&ctg_io_info, io_info, sizeof(ctg_io_info));
     ctg_io_info.store = &ctg_store;
     ctg_io_info.layout_ops = *H5D_LOPS_CONTIG;
 
@@ -2349,7 +2349,7 @@ H5D__chunk_write(H5D_io_info_t *io_info, const H5D_type_info_t *type_info,
     H5_CHECKED_ASSIGN(ctg_store.contig.dset_size, hsize_t, io_info->dset->shared->layout.u.chunk.size, uint32_t);
 
     /* Set up compact I/O info object */
-    HDmemcpy(&cpt_io_info, io_info, sizeof(cpt_io_info));
+    H5MM_memcpy(&cpt_io_info, io_info, sizeof(cpt_io_info));
     cpt_io_info.store = &cpt_store;
     cpt_io_info.layout_ops = *H5D_LOPS_COMPACT;
 
@@ -2704,7 +2704,7 @@ H5D__chunk_cinfo_cache_update(H5D_chunk_cached_t *last, const H5D_chunk_ud_t *ud
     HDassert(udata->common.scaled);
 
     /* Stored the information to cache */
-    HDmemcpy(last->scaled, udata->common.scaled, sizeof(hsize_t) * udata->common.layout->ndims);
+    H5MM_memcpy(last->scaled, udata->common.scaled, sizeof(hsize_t) * udata->common.layout->ndims);
     last->addr = udata->chunk_block.offset;
     H5_CHECKED_ASSIGN(last->nbytes, uint32_t, udata->chunk_block.length, hsize_t);
     last->chunk_idx = udata->chunk_idx;
@@ -3073,7 +3073,7 @@ H5D__chunk_flush_entry(const H5D_t *dset, H5D_rdcc_ent_t *ent, hbool_t reset)
                  */
                 if(NULL == (buf = H5MM_malloc(alloc)))
                     HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for pipeline")
-                HDmemcpy(buf, ent->chunk, alloc);
+                H5MM_memcpy(buf, ent->chunk, alloc);
             } /* end if */
             else {
                 /*
@@ -3486,7 +3486,7 @@ H5D__chunk_lock(const H5D_io_info_t *io_info, H5D_chunk_ud_t *udata,
                  */
                 if(NULL == (chunk = H5D__chunk_mem_alloc(chunk_size, pline)))
                     HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed for raw data chunk")
-                HDmemcpy(chunk, ent->chunk, chunk_size);
+                H5MM_memcpy(chunk, ent->chunk, chunk_size);
                 ent->chunk = (uint8_t *)H5D__chunk_mem_xfree(ent->chunk, old_pline);
                 ent->chunk = (uint8_t *)chunk;
                 chunk = NULL;
@@ -3512,7 +3512,7 @@ H5D__chunk_lock(const H5D_io_info_t *io_info, H5D_chunk_ud_t *udata,
                  */
                 if(NULL == (chunk = H5D__chunk_mem_alloc(chunk_size, pline)))
                     HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed for raw data chunk")
-                HDmemcpy(chunk, ent->chunk, chunk_size);
+                H5MM_memcpy(chunk, ent->chunk, chunk_size);
 
                 ent->chunk = (uint8_t *)H5D__chunk_mem_xfree(ent->chunk, old_pline);
                 ent->chunk = (uint8_t *)chunk;
@@ -3641,7 +3641,7 @@ H5D__chunk_lock(const H5D_io_info_t *io_info, H5D_chunk_ud_t *udata,
                             (void)H5D__chunk_mem_xfree(tmp_chunk, old_pline);
                             HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed for raw data chunk")
                         } /* end if */
-                        HDmemcpy(chunk, tmp_chunk, chunk_size);
+                        H5MM_memcpy(chunk, tmp_chunk, chunk_size);
                         (void)H5D__chunk_mem_xfree(tmp_chunk, old_pline);
                     } /* end if */
                 } /* end if */
@@ -3722,7 +3722,7 @@ H5D__chunk_lock(const H5D_io_info_t *io_info, H5D_chunk_ud_t *udata,
                 ent->chunk_block.offset = chunk_addr;
                 ent->chunk_block.length = chunk_alloc;
                 ent->chunk_idx = udata->chunk_idx;
-                HDmemcpy(ent->scaled, udata->common.scaled, sizeof(hsize_t) * layout->u.chunk.ndims);
+                H5MM_memcpy(ent->scaled, udata->common.scaled, sizeof(hsize_t) * layout->u.chunk.ndims);
                 H5_CHECKED_ASSIGN(ent->rd_count, uint32_t, chunk_size, size_t);
                 H5_CHECKED_ASSIGN(ent->wr_count, uint32_t, chunk_size, size_t);
                 ent->chunk = (uint8_t *)chunk;
@@ -3850,7 +3850,7 @@ H5D__chunk_unlock(const H5D_io_info_t *io_info, const H5D_chunk_ud_t *udata,
                 fake_ent.edge_chunk_state = H5D_RDCC_DISABLE_FILTERS;
             if(udata->new_unfilt_chunk)
                 fake_ent.edge_chunk_state |= H5D_RDCC_NEWLY_DISABLED_FILTERS;
-	    HDmemcpy(fake_ent.scaled, udata->common.scaled, sizeof(hsize_t) * layout->u.chunk.ndims);
+	    H5MM_memcpy(fake_ent.scaled, udata->common.scaled, sizeof(hsize_t) * layout->u.chunk.ndims);
             HDassert(layout->u.chunk.size > 0);
 	    fake_ent.chunk_idx = udata->chunk_idx;
             fake_ent.chunk_block.offset = udata->chunk_block.offset;
@@ -4137,7 +4137,7 @@ H5D__chunk_allocate(const H5D_io_info_t *io_info, hbool_t full_overwrite, hsize_
             if(has_unfilt_edge_chunks) {
                 if(NULL == (unfilt_fill_buf = H5D__chunk_mem_alloc(orig_chunk_size, &def_pline)))
                     HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for raw data chunk")
-                HDmemcpy(unfilt_fill_buf, fb_info.fill_buf, orig_chunk_size);
+                H5MM_memcpy(unfilt_fill_buf, fb_info.fill_buf, orig_chunk_size);
             } /* end if */
 
             /* Retrieve filter settings from API context */
@@ -5671,7 +5671,7 @@ H5D__chunk_copy_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
 
     if(udata->chunk_in_cache && udata->chunk) {
         HDassert(!H5F_addr_defined(chunk_rec->chunk_addr));
-        HDmemcpy(buf, udata->chunk, nbytes);
+        H5MM_memcpy(buf, udata->chunk, nbytes);
         udata->chunk = NULL;
     }
     else {
@@ -5705,7 +5705,7 @@ H5D__chunk_copy_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
             HDassert(H5F_addr_defined(ent->chunk_block.offset));
 
             H5_CHECKED_ASSIGN(nbytes, size_t, shared_fo->layout.u.chunk.size, uint32_t);
-            HDmemcpy(buf, ent->chunk, nbytes);
+            H5MM_memcpy(buf, ent->chunk, nbytes);
         }
         else {
             /* read chunk data from the source file */
@@ -5739,7 +5739,7 @@ H5D__chunk_copy_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, H5_ITER_ERROR, "datatype conversion failed")
 
         /* Copy into another buffer, to reclaim memory later */
-        HDmemcpy(reclaim_buf, buf, reclaim_buf_size);
+        H5MM_memcpy(reclaim_buf, buf, reclaim_buf_size);
 
         /* Set background buffer to all zeros */
         HDmemset(bkg, 0, buf_size);
@@ -5770,7 +5770,7 @@ H5D__chunk_copy_cb(const H5D_chunk_rec_t *chunk_rec, void *_udata)
         } /* end if */
 
         /* After fix ref, copy the new reference elements to the buffer to write out */
-        HDmemcpy(buf, bkg, buf_size);
+        H5MM_memcpy(buf, bkg, buf_size);
     } /* end if */
 
     /* Set up destination chunk callback information for insertion */
@@ -6070,7 +6070,7 @@ H5D__chunk_copy(H5F_t *f_src, H5O_storage_chunk_t *storage_src,
 
         for(ent = shared_fo->cache.chunk.head; ent; ent = next) {
             if(!H5F_addr_defined(ent->chunk_block.offset)) {
-                HDmemcpy(chunk_rec.scaled, ent->scaled, sizeof(chunk_rec.scaled));
+                H5MM_memcpy(chunk_rec.scaled, ent->scaled, sizeof(chunk_rec.scaled));
                 udata.chunk = ent->chunk;
                 udata.chunk_in_cache = TRUE;
                 if(H5D__chunk_copy_cb(&chunk_rec, &udata) < 0)
diff --git a/src/H5Dcompact.c b/src/H5Dcompact.c
index 651aaf4..df61856 100644
--- a/src/H5Dcompact.c
+++ b/src/H5Dcompact.c
@@ -529,7 +529,7 @@ H5D__compact_copy(H5F_t *f_src, H5O_storage_compact_t *_storage_src, H5F_t *f_ds
         if(NULL == (buf = H5FL_BLK_MALLOC(type_conv, buf_size)))
             HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
 
-        HDmemcpy(buf, storage_src->buf, storage_src->size);
+        H5MM_memcpy(buf, storage_src->buf, storage_src->size);
 
         /* allocate temporary bkg buff for data conversion */
         if(NULL == (bkg = H5FL_BLK_MALLOC(type_conv, buf_size)))
@@ -540,7 +540,7 @@ H5D__compact_copy(H5F_t *f_src, H5O_storage_compact_t *_storage_src, H5F_t *f_ds
             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "datatype conversion failed")
 
         /* Copy into another buffer, to reclaim memory later */
-        HDmemcpy(reclaim_buf, buf, buf_size);
+        H5MM_memcpy(reclaim_buf, buf, buf_size);
 
         /* Set background buffer to all zeros */
         HDmemset(bkg, 0, buf_size);
@@ -549,7 +549,7 @@ H5D__compact_copy(H5F_t *f_src, H5O_storage_compact_t *_storage_src, H5F_t *f_ds
         if(H5T_convert(tpath_mem_dst, tid_mem, tid_dst, nelmts, (size_t)0, (size_t)0, buf, bkg) < 0)
             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "datatype conversion failed")
 
-        HDmemcpy(storage_dst->buf, buf, storage_dst->size);
+        H5MM_memcpy(storage_dst->buf, buf, storage_dst->size);
 
         if(H5D_vlen_reclaim(tid_mem, buf_space, reclaim_buf) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_BADITER, FAIL, "unable to reclaim variable-length data")
@@ -574,11 +574,11 @@ H5D__compact_copy(H5F_t *f_src, H5O_storage_compact_t *_storage_src, H5F_t *f_ds
         } /* end if */
         else
             /* Type conversion not necessary */
-            HDmemcpy(storage_dst->buf, storage_src->buf, storage_src->size);
+            H5MM_memcpy(storage_dst->buf, storage_src->buf, storage_src->size);
     } /* end if */
     else
         /* Type conversion not necessary */
-        HDmemcpy(storage_dst->buf, storage_src->buf, storage_src->size);
+        H5MM_memcpy(storage_dst->buf, storage_src->buf, storage_src->size);
 
     /* Mark destination buffer as dirty */
     storage_dst->dirty = TRUE;
diff --git a/src/H5Dcontig.c b/src/H5Dcontig.c
index c2e9bfc..adf6719 100644
--- a/src/H5Dcontig.c
+++ b/src/H5Dcontig.c
@@ -776,7 +776,7 @@ H5D__contig_readvv_sieve_cb(hsize_t dst_off, hsize_t src_off, size_t len,
                 HGOTO_ERROR(H5E_DATASET, H5E_READERROR, FAIL, "block read failed")
 
             /* Grab the data out of the buffer (must be first piece of data in buffer ) */
-            HDmemcpy(buf, dset_contig->sieve_buf, len);
+            H5MM_memcpy(buf, dset_contig->sieve_buf, len);
 
             /* Reset sieve buffer dirty flag */
             dset_contig->sieve_dirty = FALSE;
@@ -796,7 +796,7 @@ H5D__contig_readvv_sieve_cb(hsize_t dst_off, hsize_t src_off, size_t len,
             unsigned char *base_sieve_buf = dset_contig->sieve_buf + (addr - sieve_start);
 
             /* Grab the data out of the buffer */
-            HDmemcpy(buf, base_sieve_buf, len);
+            H5MM_memcpy(buf, base_sieve_buf, len);
         } /* end if */
         /* Entire request is not within this data sieve buffer */
         else {
@@ -860,7 +860,7 @@ H5D__contig_readvv_sieve_cb(hsize_t dst_off, hsize_t src_off, size_t len,
                     HGOTO_ERROR(H5E_DATASET, H5E_READERROR, FAIL, "block read failed")
 
                 /* Grab the data out of the buffer (must be first piece of data in buffer ) */
-                HDmemcpy(buf, dset_contig->sieve_buf, len);
+                H5MM_memcpy(buf, dset_contig->sieve_buf, len);
 
                 /* Reset sieve buffer dirty flag */
                 dset_contig->sieve_dirty = FALSE;
@@ -1058,7 +1058,7 @@ H5D__contig_writevv_sieve_cb(hsize_t dst_off, hsize_t src_off, size_t len,
             } /* end if */
 
             /* Grab the data out of the buffer (must be first piece of data in buffer ) */
-            HDmemcpy(dset_contig->sieve_buf, buf, len);
+            H5MM_memcpy(dset_contig->sieve_buf, buf, len);
 
             /* Set sieve buffer dirty flag */
             dset_contig->sieve_dirty = TRUE;
@@ -1078,7 +1078,7 @@ H5D__contig_writevv_sieve_cb(hsize_t dst_off, hsize_t src_off, size_t len,
             unsigned char *base_sieve_buf = dset_contig->sieve_buf + (addr - sieve_start);
 
             /* Put the data into the sieve buffer */
-            HDmemcpy(base_sieve_buf, buf, len);
+            H5MM_memcpy(base_sieve_buf, buf, len);
 
             /* Set sieve buffer dirty flag */
             dset_contig->sieve_dirty = TRUE;
@@ -1121,7 +1121,7 @@ H5D__contig_writevv_sieve_cb(hsize_t dst_off, hsize_t src_off, size_t len,
                         HDmemmove(dset_contig->sieve_buf + len, dset_contig->sieve_buf, dset_contig->sieve_size);
 
                         /* Copy in new information (must be first in sieve buffer) */
-                        HDmemcpy(dset_contig->sieve_buf, buf, len);
+                        H5MM_memcpy(dset_contig->sieve_buf, buf, len);
 
                         /* Adjust sieve location */
                         dset_contig->sieve_loc = addr;
@@ -1130,7 +1130,7 @@ H5D__contig_writevv_sieve_cb(hsize_t dst_off, hsize_t src_off, size_t len,
                     /* Append to existing sieve buffer */
                     else {
                         /* Copy in new information */
-                        HDmemcpy(dset_contig->sieve_buf + sieve_size, buf, len);
+                        H5MM_memcpy(dset_contig->sieve_buf + sieve_size, buf, len);
                     } /* end else */
 
                     /* Adjust sieve size */
@@ -1184,7 +1184,7 @@ H5D__contig_writevv_sieve_cb(hsize_t dst_off, hsize_t src_off, size_t len,
                     } /* end if */
 
                     /* Grab the data out of the buffer (must be first piece of data in buffer ) */
-                    HDmemcpy(dset_contig->sieve_buf, buf, len);
+                    H5MM_memcpy(dset_contig->sieve_buf, buf, len);
 
                     /* Set sieve buffer dirty flag */
                     dset_contig->sieve_dirty = TRUE;
@@ -1539,7 +1539,7 @@ H5D__contig_copy(H5F_t *f_src, const H5O_storage_contig_t *storage_src,
         if(try_sieve && (addr_src >= sieve_start) && ((addr_src + src_nbytes -1) < sieve_end)) {
             unsigned char *base_sieve_buf = shared_fo->cache.contig.sieve_buf + (addr_src - sieve_start);
 
-            HDmemcpy(buf, base_sieve_buf, src_nbytes);
+            H5MM_memcpy(buf, base_sieve_buf, src_nbytes);
         } else
             /* Read raw data from source file */
             if(H5F_block_read(f_src, H5FD_MEM_DRAW, addr_src, src_nbytes, buf) < 0)
@@ -1552,7 +1552,7 @@ H5D__contig_copy(H5F_t *f_src, const H5O_storage_contig_t *storage_src,
                 HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINIT, FAIL, "datatype conversion failed")
 
             /* Copy into another buffer, to reclaim memory later */
-            HDmemcpy(reclaim_buf, buf, mem_nbytes);
+            H5MM_memcpy(reclaim_buf, buf, mem_nbytes);
 
             /* Set background buffer to all zeros */
             HDmemset(bkg, 0, buf_size);
@@ -1578,7 +1578,7 @@ H5D__contig_copy(H5F_t *f_src, const H5O_storage_contig_t *storage_src,
                     HGOTO_ERROR(H5E_DATASET, H5E_CANTCOPY, FAIL, "unable to copy reference attribute")
 
                 /* After fix ref, copy the new reference elements to the buffer to write out */
-                HDmemcpy(buf, bkg,  buf_size);
+                H5MM_memcpy(buf, bkg,  buf_size);
             } /* end if */
             else
                 /* Reset value to zero */
diff --git a/src/H5Dearray.c b/src/H5Dearray.c
index a8fffbc..8f6fae4 100644
--- a/src/H5Dearray.c
+++ b/src/H5Dearray.c
@@ -1197,11 +1197,11 @@ H5D__earray_idx_resize(H5O_layout_chunk_t *layout)
         hsize_t swizzled_max_chunks[H5O_LAYOUT_NDIMS];  /* Swizzled form of max # of chunks in each dimension */
 
         /* Get the swizzled chunk dimensions */
-        HDmemcpy(layout->u.earray.swizzled_dim, layout->dim, (layout->ndims - 1) * sizeof(layout->dim[0]));
+        H5MM_memcpy(layout->u.earray.swizzled_dim, layout->dim, (layout->ndims - 1) * sizeof(layout->dim[0]));
         H5VM_swizzle_coords(uint32_t, layout->u.earray.swizzled_dim, layout->u.earray.unlim_dim);
 
         /* Get the swizzled number of chunks in each dimension */
-        HDmemcpy(swizzled_chunks, layout->chunks, (layout->ndims - 1) * sizeof(swizzled_chunks[0]));
+        H5MM_memcpy(swizzled_chunks, layout->chunks, (layout->ndims - 1) * sizeof(swizzled_chunks[0]));
         H5VM_swizzle_coords(hsize_t, swizzled_chunks, layout->u.earray.unlim_dim);
 
         /* Get the swizzled "down" sizes for each dimension */
@@ -1209,7 +1209,7 @@ H5D__earray_idx_resize(H5O_layout_chunk_t *layout)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTSET, FAIL, "can't compute swizzled 'down' chunk size value")
 
         /* Get the swizzled max number of chunks in each dimension */
-        HDmemcpy(swizzled_max_chunks, layout->max_chunks, (layout->ndims - 1) * sizeof(swizzled_max_chunks[0]));
+        H5MM_memcpy(swizzled_max_chunks, layout->max_chunks, (layout->ndims - 1) * sizeof(swizzled_max_chunks[0]));
         H5VM_swizzle_coords(hsize_t, swizzled_max_chunks, layout->u.earray.unlim_dim);
 
         /* Get the swizzled max "down" sizes for each dimension */
diff --git a/src/H5Defl.c b/src/H5Defl.c
index 42b3947..19f3a00 100644
--- a/src/H5Defl.c
+++ b/src/H5Defl.c
@@ -227,7 +227,7 @@ H5D__efl_io_init(const H5D_io_info_t *io_info, const H5D_type_info_t H5_ATTR_UNU
 {
     FUNC_ENTER_STATIC_NOERR
 
-    HDmemcpy(&io_info->store->efl, &(io_info->dset->shared->dcpl_cache.efl), sizeof(H5O_efl_t));
+    H5MM_memcpy(&io_info->store->efl, &(io_info->dset->shared->dcpl_cache.efl), sizeof(H5O_efl_t));
 
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5D__efl_io_init() */
diff --git a/src/H5Dfill.c b/src/H5Dfill.c
index 619f699..1c501ce 100644
--- a/src/H5Dfill.c
+++ b/src/H5Dfill.c
@@ -300,7 +300,7 @@ H5D__fill(const void *fill, const H5T_t *fill_type, void *buf,
                     HGOTO_ERROR(H5E_DATASET, H5E_NOSPACE, FAIL, "can't get actual buffer")
 
                 /* Copy the user's data into the buffer for conversion */
-                HDmemcpy(elem_ptr, fill, src_type_size);
+                H5MM_memcpy(elem_ptr, fill, src_type_size);
 
                 /* If there's no VL type of data, do conversion first then fill the data into
                  * the memory buffer. */
@@ -577,7 +577,7 @@ H5D__fill_refill_vl(H5D_fill_buf_info_t *fb_info, size_t nelmts)
     HDassert(fb_info->fill_buf);
 
     /* Make a copy of the (disk-based) fill value into the buffer */
-    HDmemcpy(fb_info->fill_buf, fb_info->fill->buf, fb_info->file_elmt_size);
+    H5MM_memcpy(fb_info->fill_buf, fb_info->fill->buf, fb_info->file_elmt_size);
 
     /* Reset first element of background buffer, if necessary */
     if(H5T_path_bkg(fb_info->fill_to_mem_tpath))
@@ -603,7 +603,7 @@ H5D__fill_refill_vl(H5D_fill_buf_info_t *fb_info, size_t nelmts)
     if(!buf)
         HGOTO_ERROR(H5E_DATASET, H5E_CANTALLOC, FAIL, "memory allocation failed for temporary fill buffer")
 
-    HDmemcpy(buf, fb_info->fill_buf, fb_info->fill_buf_size);
+    H5MM_memcpy(buf, fb_info->fill_buf, fb_info->fill_buf_size);
 
     /* Type convert the dataset buffer, to copy any VL components */
     if(H5T_convert(fb_info->mem_to_dset_tpath, fb_info->mem_tid, fb_info->file_tid, nelmts, (size_t)0, (size_t)0, fb_info->fill_buf, fb_info->bkg_buf) < 0)
diff --git a/src/H5Dint.c b/src/H5Dint.c
index 874e845..6fc02de 100644
--- a/src/H5Dint.c
+++ b/src/H5Dint.c
@@ -470,7 +470,7 @@ H5D__new(hid_t dcpl_id, hbool_t creating, hbool_t vl_type)
         HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
 
     /* Copy the default dataset information */
-    HDmemcpy(new_dset, &H5D_def_dset, sizeof(H5D_shared_t));
+    H5MM_memcpy(new_dset, &H5D_def_dset, sizeof(H5D_shared_t));
 
     /* If we are using the default dataset creation property list, during creation
      * don't bother to copy it, just increment the reference count
@@ -774,7 +774,7 @@ H5D__calculate_minimum_header_size(H5F_t *file, H5D_t *dset, H5O_t *ohdr)
 
         /* Shallow copy the fill value property */
         /* guards against shared component modification */
-        HDmemcpy(&old_fill_prop, fill_prop, sizeof(old_fill_prop));
+        H5MM_memcpy(&old_fill_prop, fill_prop, sizeof(old_fill_prop));
 
         if (H5O_msg_reset_share(H5O_FILL_ID, &old_fill_prop) < 0)
             HGOTO_ERROR(H5E_DATASET, H5E_CANTGET, 0, "can't reset the copied fill property")
@@ -1000,7 +1000,7 @@ H5D__update_oh_info(H5F_t *file, H5D_t *dset, hid_t dapl_id)
 
         /* Shallow copy the fill value property */
         /* (we only want to make certain that the shared component isn't modified) */
-        HDmemcpy(&old_fill_prop, fill_prop, sizeof(old_fill_prop));
+        H5MM_memcpy(&old_fill_prop, fill_prop, sizeof(old_fill_prop));
 
         /* Reset shared component info */
         H5O_msg_reset_share(H5O_FILL_ID, &old_fill_prop);
@@ -1642,7 +1642,7 @@ H5D__append_flush_setup(H5D_t *dset, hid_t dapl_id)
                 dset->shared->append_flush.ndims = info.ndims;
                 dset->shared->append_flush.func = info.func;
                 dset->shared->append_flush.udata = info.udata;
-                HDmemcpy(dset->shared->append_flush.boundary, info.boundary, sizeof(info.boundary));
+                H5MM_memcpy(dset->shared->append_flush.boundary, info.boundary, sizeof(info.boundary));
             } /* end if */
         } /* end if */
     } /* end if */
@@ -2778,7 +2778,7 @@ H5D__set_extent(H5D_t *dset, const hsize_t *size)
 
     /* Keep the current dataspace dimensions for later */
     HDcompile_assert(sizeof(curr_dims) == sizeof(dset->shared->curr_dims));
-    HDmemcpy(curr_dims, dset->shared->curr_dims, H5S_MAX_RANK * sizeof(curr_dims[0]));
+    H5MM_memcpy(curr_dims, dset->shared->curr_dims, H5S_MAX_RANK * sizeof(curr_dims[0]));
 
     /* Modify the size of the dataspace */
     if((changed = H5S_set_extent(dset->shared->space, size)) < 0)
@@ -3063,7 +3063,7 @@ H5D__format_convert(H5D_t *dataset)
             idx_info.storage = &dataset->shared->layout.storage.u.chunk;
 
             /* Copy the current layout info to the new layout */
-            HDmemcpy(newlayout, &dataset->shared->layout, sizeof(H5O_layout_t));
+            H5MM_memcpy(newlayout, &dataset->shared->layout, sizeof(H5O_layout_t));
 
             /* Set up info for version 1 B-tree in the new layout */
             newlayout->version = H5O_LAYOUT_VERSION_3;
@@ -3114,7 +3114,7 @@ H5D__format_convert(H5D_t *dataset)
                 HGOTO_ERROR(H5E_DATASET, H5E_CANTFREE, FAIL, "unable to release chunk index info")
 
             /* Copy the new layout to the dataset's layout */
-            HDmemcpy(&dataset->shared->layout, newlayout, sizeof(H5O_layout_t));
+            H5MM_memcpy(&dataset->shared->layout, newlayout, sizeof(H5O_layout_t));
 
             break;
 
diff --git a/src/H5Dmpio.c b/src/H5Dmpio.c
index 2a6c05f..d23cb63 100644
--- a/src/H5Dmpio.c
+++ b/src/H5Dmpio.c
@@ -1427,7 +1427,7 @@ H5D__link_chunk_filtered_collective_io(H5D_io_info_t *io_info, const H5D_type_in
             for (i = 0, offset = 0; i < (size_t) mpi_rank; i++)
                 offset += num_chunks_selected_array[i];
 
-            HDmemcpy(chunk_list, &collective_chunk_list[offset], num_chunks_selected_array[mpi_rank] * sizeof(H5D_filtered_collective_io_info_t));
+            H5MM_memcpy(chunk_list, &collective_chunk_list[offset], num_chunks_selected_array[mpi_rank] * sizeof(H5D_filtered_collective_io_info_t));
 
             /* Create single MPI type encompassing each selection in the dataspace */
             if (H5D__mpio_filtered_collective_write_type(chunk_list, chunk_list_num_entries,
@@ -1553,7 +1553,7 @@ if(H5DEBUG(D))
         HGOTO_ERROR(H5E_DATASET, H5E_CANTRECV, FAIL, "unable to obtain MPIO mode")
 
     /* Set up contiguous I/O info object */
-    HDmemcpy(&ctg_io_info, io_info, sizeof(ctg_io_info));
+    H5MM_memcpy(&ctg_io_info, io_info, sizeof(ctg_io_info));
     ctg_io_info.store = &ctg_store;
     ctg_io_info.layout_ops = *H5D_LOPS_CONTIG;
 
@@ -1561,7 +1561,7 @@ if(H5DEBUG(D))
     ctg_store.contig.dset_size = (hsize_t)io_info->dset->shared->layout.u.chunk.size;
 
     /* Set up compact I/O info object */
-    HDmemcpy(&cpt_io_info, io_info, sizeof(cpt_io_info));
+    H5MM_memcpy(&cpt_io_info, io_info, sizeof(cpt_io_info));
     cpt_io_info.store = &cpt_store;
     cpt_io_info.layout_ops = *H5D_LOPS_COMPACT;
 
@@ -1788,7 +1788,7 @@ H5D__multi_chunk_filtered_collective_io(H5D_io_info_t *io_info, const H5D_type_i
         HGOTO_ERROR(H5E_DATASET, H5E_CANTINIT, FAIL, "couldn't construct filtered I/O info list")
 
     /* Set up contiguous I/O info object */
-    HDmemcpy(&ctg_io_info, io_info, sizeof(ctg_io_info));
+    H5MM_memcpy(&ctg_io_info, io_info, sizeof(ctg_io_info));
     ctg_io_info.store = &ctg_store;
     ctg_io_info.layout_ops = *H5D_LOPS_CONTIG;
 
@@ -1893,7 +1893,7 @@ H5D__multi_chunk_filtered_collective_io(H5D_io_info_t *io_info, const H5D_type_i
 
                 /* Collect the new chunk info back to the local copy, since only the record in the
                  * collective array gets updated by the chunk re-allocation */
-                HDmemcpy(&chunk_list[i].chunk_states.new_chunk, &collective_chunk_list[offset].chunk_states.new_chunk, sizeof(chunk_list[i].chunk_states.new_chunk));
+                H5MM_memcpy(&chunk_list[i].chunk_states.new_chunk, &collective_chunk_list[offset].chunk_states.new_chunk, sizeof(chunk_list[i].chunk_states.new_chunk));
 
                 H5_CHECKED_ASSIGN(mpi_type_count, int, chunk_list[i].chunk_states.new_chunk.length, hsize_t);
 
@@ -2517,8 +2517,8 @@ H5D__obtain_mpio_mode(H5D_io_info_t* io_info, H5D_chunk_map_t *fm,
 
 
         /* merge buffer io_mode info and chunk addr into one */
-        HDmemcpy(mergebuf, assign_io_mode, total_chunks);
-        HDmemcpy(tempbuf, chunk_addr, sizeof(haddr_t) * total_chunks);
+        H5MM_memcpy(mergebuf, assign_io_mode, total_chunks);
+        H5MM_memcpy(tempbuf, chunk_addr, sizeof(haddr_t) * total_chunks);
 
         H5MM_free(nproc_per_chunk);
     } /* end if */
@@ -2527,8 +2527,8 @@ H5D__obtain_mpio_mode(H5D_io_info_t* io_info, H5D_chunk_map_t *fm,
     if(MPI_SUCCESS != (mpi_code = MPI_Bcast(mergebuf, ((sizeof(haddr_t) + 1) * total_chunks), MPI_BYTE, root, comm)))
         HMPI_GOTO_ERROR(FAIL, "MPI_BCast failed", mpi_code)
 
-    HDmemcpy(assign_io_mode, mergebuf, total_chunks);
-    HDmemcpy(chunk_addr, tempbuf, sizeof(haddr_t) * total_chunks);
+    H5MM_memcpy(assign_io_mode, mergebuf, total_chunks);
+    H5MM_memcpy(chunk_addr, tempbuf, sizeof(haddr_t) * total_chunks);
 
 #ifdef H5_HAVE_INSTRUMENTED_LIBRARY
 {
@@ -2630,7 +2630,7 @@ H5D__construct_filtered_io_info_list(const H5D_io_info_t *io_info, const H5D_typ
             local_info_array[i].async_info.receive_buffer_array = NULL;
             local_info_array[i].async_info.receive_requests_array = NULL;
 
-            HDmemcpy(local_info_array[i].scaled, chunk_info->scaled, sizeof(chunk_info->scaled));
+            H5MM_memcpy(local_info_array[i].scaled, chunk_info->scaled, sizeof(chunk_info->scaled));
 
             if ((select_npoints = H5S_GET_SELECT_NPOINTS(chunk_info->mspace)) < 0)
                 HGOTO_ERROR(H5E_DATASET, H5E_CANTCOUNT, FAIL, "dataspace is invalid")
diff --git a/src/H5Dscatgath.c b/src/H5Dscatgath.c
index 266f5f5..7498e63 100644
--- a/src/H5Dscatgath.c
+++ b/src/H5Dscatgath.c
@@ -117,7 +117,7 @@ H5D__scatter_file(const H5D_io_info_t *_io_info,
     HDassert(_buf);
 
     /* Set up temporary I/O info object */
-    HDmemcpy(&tmp_io_info, _io_info, sizeof(*_io_info));
+    H5MM_memcpy(&tmp_io_info, _io_info, sizeof(*_io_info));
     tmp_io_info.op_type = H5D_IO_OP_WRITE;
     tmp_io_info.u.wbuf = _buf;
 
@@ -220,7 +220,7 @@ H5D__gather_file(const H5D_io_info_t *_io_info,
     HDassert(_buf);
 
     /* Set up temporary I/O info object */
-    HDmemcpy(&tmp_io_info, _io_info, sizeof(*_io_info));
+    H5MM_memcpy(&tmp_io_info, _io_info, sizeof(*_io_info));
     tmp_io_info.op_type = H5D_IO_OP_READ;
     tmp_io_info.u.rbuf = _buf;
 
@@ -337,7 +337,7 @@ H5D__scatter_mem (const void *_tscat_buf, const H5S_t *space,
             /* Get the number of bytes in sequence */
             curr_len = len[curr_seq];
 
-            HDmemcpy(buf + off[curr_seq], tscat_buf, curr_len);
+            H5MM_memcpy(buf + off[curr_seq], tscat_buf, curr_len);
 
             /* Advance offset in destination buffer */
             tscat_buf += curr_len;
@@ -425,7 +425,7 @@ H5D__gather_mem(const void *_buf, const H5S_t *space,
             /* Get the number of bytes in sequence */
             curr_len = len[curr_seq];
 
-            HDmemcpy(tgath_buf, buf + off[curr_seq], curr_len);
+            H5MM_memcpy(tgath_buf, buf + off[curr_seq], curr_len);
 
             /* Advance offset in gather buffer */
             tgath_buf += curr_len;
diff --git a/src/H5Dvirtual.c b/src/H5Dvirtual.c
index a803cca..6c0cfba 100644
--- a/src/H5Dvirtual.c
+++ b/src/H5Dvirtual.c
@@ -493,11 +493,11 @@ H5D__virtual_store_layout(H5F_t *f, H5O_layout_t *layout)
         /* Encode each entry */
         for(i = 0; i < layout->storage.u.virt.list_nused; i++) {
             /* Source file name */
-            HDmemcpy((char *)heap_block_p, layout->storage.u.virt.list[i].source_file_name, str_size[2 * i]);
+            H5MM_memcpy((char *)heap_block_p, layout->storage.u.virt.list[i].source_file_name, str_size[2 * i]);
             heap_block_p += str_size[2 * i];
 
             /* Source dataset name */
-            HDmemcpy((char *)heap_block_p, layout->storage.u.virt.list[i].source_dset_name, str_size[(2 * i) + 1]);
+            H5MM_memcpy((char *)heap_block_p, layout->storage.u.virt.list[i].source_dset_name, str_size[(2 * i) + 1]);
             heap_block_p += str_size[(2 * i) + 1];
 
             /* Source selection */
@@ -1109,7 +1109,7 @@ H5D__virtual_str_append(const char *src, size_t src_len, char **p, char **buf,
 
     /* Copy string to *p.  Note that since src in not NULL terminated, we must
      * use memcpy */
-    (void)HDmemcpy(*p, src, src_len);
+    (void)H5MM_memcpy(*p, src, src_len);
 
     /* Advance *p */
     *p += src_len;
diff --git a/src/H5EA.c b/src/H5EA.c
index 9ceb144..5621d33 100644
--- a/src/H5EA.c
+++ b/src/H5EA.c
@@ -693,7 +693,7 @@ H5EA_set(const H5EA_t *ea, hsize_t idx, const void *elmt))
     HDassert(thing_unprot_func);
 
     /* Set element in thing's element buffer */
-    HDmemcpy(thing_elmt_buf + (hdr->cparam.cls->nat_elmt_size * thing_elmt_idx), elmt, hdr->cparam.cls->nat_elmt_size);
+    H5MM_memcpy(thing_elmt_buf + (hdr->cparam.cls->nat_elmt_size * thing_elmt_idx), elmt, hdr->cparam.cls->nat_elmt_size);
     thing_cache_flags |= H5AC__DIRTIED_FLAG;
 
     /* Update max. element set in array, if appropriate */
@@ -765,7 +765,7 @@ H5EA_get(const H5EA_t *ea, hsize_t idx, void *elmt))
         } /* end if */
         else
             /* Get element from thing's element buffer */
-            HDmemcpy(elmt, thing_elmt_buf + (hdr->cparam.cls->nat_elmt_size * thing_elmt_idx), hdr->cparam.cls->nat_elmt_size);
+            H5MM_memcpy(elmt, thing_elmt_buf + (hdr->cparam.cls->nat_elmt_size * thing_elmt_idx), hdr->cparam.cls->nat_elmt_size);
     } /* end else */
 
 CATCH
diff --git a/src/H5EAcache.c b/src/H5EAcache.c
index 8138991..9e908e7 100644
--- a/src/H5EAcache.c
+++ b/src/H5EAcache.c
@@ -479,7 +479,7 @@ H5EA__cache_hdr_serialize(const H5F_t *f, void *_image, size_t H5_ATTR_UNUSED le
     HDassert(hdr);
 
     /* Magic number */
-    HDmemcpy(image, H5EA_HDR_MAGIC, (size_t)H5_SIZEOF_MAGIC);
+    H5MM_memcpy(image, H5EA_HDR_MAGIC, (size_t)H5_SIZEOF_MAGIC);
     image += H5_SIZEOF_MAGIC;
 
     /* Version # */
@@ -867,7 +867,7 @@ H5EA__cache_iblock_serialize(const H5F_t *f, void *_image, size_t H5_ATTR_UNUSED
     /* Get temporary pointer to serialized info */
 
     /* Magic number */
-    HDmemcpy(image, H5EA_IBLOCK_MAGIC, (size_t)H5_SIZEOF_MAGIC);
+    H5MM_memcpy(image, H5EA_IBLOCK_MAGIC, (size_t)H5_SIZEOF_MAGIC);
     image += H5_SIZEOF_MAGIC;
 
     /* Version # */
@@ -1179,7 +1179,7 @@ H5EA__cache_sblock_deserialize(const void *_image, size_t len,
         size_t tot_page_init_size = sblock->ndblks * sblock->dblk_page_init_size;        /* Compute total size of 'page init' buffer */
 
         /* Retrieve the 'page init' bitmasks */
-        HDmemcpy(sblock->page_init, image, tot_page_init_size);
+        H5MM_memcpy(sblock->page_init, image, tot_page_init_size);
         image += tot_page_init_size;
     } /* end if */
 
@@ -1276,7 +1276,7 @@ H5EA__cache_sblock_serialize(const H5F_t *f, void *_image, size_t H5_ATTR_UNUSED
     HDassert(sblock->hdr);
 
     /* Magic number */
-    HDmemcpy(image, H5EA_SBLOCK_MAGIC, (size_t)H5_SIZEOF_MAGIC);
+    H5MM_memcpy(image, H5EA_SBLOCK_MAGIC, (size_t)H5_SIZEOF_MAGIC);
     image += H5_SIZEOF_MAGIC;
 
     /* Version # */
@@ -1298,7 +1298,7 @@ H5EA__cache_sblock_serialize(const H5F_t *f, void *_image, size_t H5_ATTR_UNUSED
         size_t tot_page_init_size = sblock->ndblks * sblock->dblk_page_init_size;        /* Compute total size of 'page init' buffer */
 
         /* Store the 'page init' bitmasks */
-        HDmemcpy(image, sblock->page_init, tot_page_init_size);
+        H5MM_memcpy(image, sblock->page_init, tot_page_init_size);
         image += tot_page_init_size;
     } /* end if */
 
@@ -1690,7 +1690,7 @@ H5EA__cache_dblock_serialize(const H5F_t *f, void *_image, size_t H5_ATTR_UNUSED
     HDassert(dblock->hdr);
 
     /* Magic number */
-    HDmemcpy(image, H5EA_DBLOCK_MAGIC, (size_t)H5_SIZEOF_MAGIC);
+    H5MM_memcpy(image, H5EA_DBLOCK_MAGIC, (size_t)H5_SIZEOF_MAGIC);
     image += H5_SIZEOF_MAGIC;
 
     /* Version # */
diff --git a/src/H5EAhdr.c b/src/H5EAhdr.c
index 62a23b8..a0bea79 100644
--- a/src/H5EAhdr.c
+++ b/src/H5EAhdr.c
@@ -407,7 +407,7 @@ H5EA__hdr_create(H5F_t *f, const H5EA_create_t *cparam, void *ctx_udata))
     hdr->idx_blk_addr = HADDR_UNDEF;
 
     /* Set the creation parameters for the array */
-    HDmemcpy(&hdr->cparam, cparam, sizeof(hdr->cparam));
+    H5MM_memcpy(&hdr->cparam, cparam, sizeof(hdr->cparam));
 
     /* Finish initializing extensible array header */
     if(H5EA__hdr_init(hdr, ctx_udata) < 0)
diff --git a/src/H5EAstat.c b/src/H5EAstat.c
index 72c4d14..6c55d7e 100644
--- a/src/H5EAstat.c
+++ b/src/H5EAstat.c
@@ -108,7 +108,7 @@ HDfprintf(stderr, "%s: Called\n", FUNC);
     HDassert(stats);
 
     /* Copy extensible array statistics */
-    HDmemcpy(stats, &ea->hdr->stats, sizeof(ea->hdr->stats));
+    H5MM_memcpy(stats, &ea->hdr->stats, sizeof(ea->hdr->stats));
 
 END_FUNC(PRIV)  /* end H5EA_get_stats() */
 
diff --git a/src/H5FA.c b/src/H5FA.c
index 61aaa53..03616ad 100644
--- a/src/H5FA.c
+++ b/src/H5FA.c
@@ -371,7 +371,7 @@ H5FA_set(const H5FA_t *fa, hsize_t idx, const void *elmt))
     /* Check for paging data block */
     if(!dblock->npages) {
         /* Set element in data block */
-        HDmemcpy(((uint8_t *)dblock->elmts) + (hdr->cparam.cls->nat_elmt_size * idx), elmt, hdr->cparam.cls->nat_elmt_size);
+        H5MM_memcpy(((uint8_t *)dblock->elmts) + (hdr->cparam.cls->nat_elmt_size * idx), elmt, hdr->cparam.cls->nat_elmt_size);
         dblock_cache_flags |= H5AC__DIRTIED_FLAG;
     } /* end if */
     else { /* paging */
@@ -410,7 +410,7 @@ H5FA_set(const H5FA_t *fa, hsize_t idx, const void *elmt))
 	    H5E_THROW(H5E_CANTPROTECT, "unable to protect fixed array data block page, address = %llu", (unsigned long long)dblk_page_addr)
 
         /* Set the element in the data block page */
-        HDmemcpy(((uint8_t *)dblk_page->elmts) + (hdr->cparam.cls->nat_elmt_size * elmt_idx), elmt, hdr->cparam.cls->nat_elmt_size);
+        H5MM_memcpy(((uint8_t *)dblk_page->elmts) + (hdr->cparam.cls->nat_elmt_size * elmt_idx), elmt, hdr->cparam.cls->nat_elmt_size);
         dblk_page_cache_flags |= H5AC__DIRTIED_FLAG;
     } /* end else */
 
@@ -474,7 +474,7 @@ H5FA_get(const H5FA_t *fa, hsize_t idx, void *elmt))
         /* Check for paged data block */
         if(!dblock->npages)
             /* Retrieve element from data block */
-            HDmemcpy(elmt, ((uint8_t *)dblock->elmts) + (hdr->cparam.cls->nat_elmt_size * idx), hdr->cparam.cls->nat_elmt_size);
+            H5MM_memcpy(elmt, ((uint8_t *)dblock->elmts) + (hdr->cparam.cls->nat_elmt_size * idx), hdr->cparam.cls->nat_elmt_size);
         else { /* paging */
             size_t  page_idx;           /* Index of page within data block */
 
@@ -512,7 +512,7 @@ H5FA_get(const H5FA_t *fa, hsize_t idx, void *elmt))
                     H5E_THROW(H5E_CANTPROTECT, "unable to protect fixed array data block page, address = %llu", (unsigned long long)dblk_page_addr)
 
                 /* Retrieve element from data block */
-                HDmemcpy(elmt, ((uint8_t *)dblk_page->elmts) + (hdr->cparam.cls->nat_elmt_size * elmt_idx), hdr->cparam.cls->nat_elmt_size);
+                H5MM_memcpy(elmt, ((uint8_t *)dblk_page->elmts) + (hdr->cparam.cls->nat_elmt_size * elmt_idx), hdr->cparam.cls->nat_elmt_size);
             } /* end else */
         } /* end else */
     } /* end else */
diff --git a/src/H5FAcache.c b/src/H5FAcache.c
index 1f199e9..2726bff 100644
--- a/src/H5FAcache.c
+++ b/src/H5FAcache.c
@@ -409,7 +409,7 @@ H5FA__cache_hdr_serialize(const H5F_t *f, void *_image, size_t H5_ATTR_UNUSED le
     HDassert(hdr);
 
     /* Magic number */
-    HDmemcpy(image, H5FA_HDR_MAGIC, (size_t)H5_SIZEOF_MAGIC);
+    H5MM_memcpy(image, H5FA_HDR_MAGIC, (size_t)H5_SIZEOF_MAGIC);
     image += H5_SIZEOF_MAGIC;
 
     /* Version # */
@@ -693,7 +693,7 @@ H5FA__cache_dblock_deserialize(const void *_image, size_t len,
 
     /* Page initialization flags */
     if(dblock->npages > 0) {
-	HDmemcpy(dblock->dblk_page_init, image, dblock->dblk_page_init_size);
+	H5MM_memcpy(dblock->dblk_page_init, image, dblock->dblk_page_init_size);
         image += dblock->dblk_page_init_size;
     } /* end if */
 
@@ -797,7 +797,7 @@ H5FA__cache_dblock_serialize(const H5F_t *f, void *_image, size_t H5_ATTR_UNUSED
     HDassert(dblock->hdr);
 
     /* Magic number */
-    HDmemcpy(image, H5FA_DBLOCK_MAGIC, (size_t)H5_SIZEOF_MAGIC);
+    H5MM_memcpy(image, H5FA_DBLOCK_MAGIC, (size_t)H5_SIZEOF_MAGIC);
     image += H5_SIZEOF_MAGIC;
 
     /* Version # */
@@ -812,7 +812,7 @@ H5FA__cache_dblock_serialize(const H5F_t *f, void *_image, size_t H5_ATTR_UNUSED
     /* Page init flags */
     if(dblock->npages > 0) {
         /* Store the 'page init' bitmasks */
-        HDmemcpy(image, dblock->dblk_page_init, dblock->dblk_page_init_size);
+        H5MM_memcpy(image, dblock->dblk_page_init, dblock->dblk_page_init_size);
         image += dblock->dblk_page_init_size;
     } /* end if */
 
diff --git a/src/H5FAhdr.c b/src/H5FAhdr.c
index 2e3db0b..5a6283f 100644
--- a/src/H5FAhdr.c
+++ b/src/H5FAhdr.c
@@ -207,7 +207,7 @@ H5FA__hdr_create(H5F_t *f, const H5FA_create_t *cparam, void *ctx_udata))
     hdr->dblk_addr = HADDR_UNDEF;
 
     /* Set the creation parameters for the array */
-    HDmemcpy(&hdr->cparam, cparam, sizeof(hdr->cparam));
+    H5MM_memcpy(&hdr->cparam, cparam, sizeof(hdr->cparam));
 
     /* Finish initializing fixed array header */
     if(H5FA__hdr_init(hdr, ctx_udata) < 0)
diff --git a/src/H5FAstat.c b/src/H5FAstat.c
index 3c06855..e70fcb8 100644
--- a/src/H5FAstat.c
+++ b/src/H5FAstat.c
@@ -105,7 +105,7 @@ HDfprintf(stderr, "%s: Called\n", FUNC);
     HDassert(stats);
 
     /* Copy fixed array statistics */
-    HDmemcpy(stats, &fa->hdr->stats, sizeof(fa->hdr->stats));
+    H5MM_memcpy(stats, &fa->hdr->stats, sizeof(fa->hdr->stats));
 
 END_FUNC(PRIV)  /* end H5FA_get_stats() */
 
diff --git a/src/H5FD.c b/src/H5FD.c
index 5585f37..61969b6 100644
--- a/src/H5FD.c
+++ b/src/H5FD.c
@@ -293,7 +293,7 @@ H5FD_register(const void *_cls, size_t size, hbool_t app_ref)
     /* Copy the class structure so the caller can reuse or free it */
     if(NULL == (saved = (H5FD_class_t *)H5MM_malloc(size)))
         HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, H5I_INVALID_HID, "memory allocation failed for file driver class struct")
-    HDmemcpy(saved, cls, size);
+    H5MM_memcpy(saved, cls, size);
 
     /* Create the new class ID */
     if((ret_value = H5I_register(H5I_VFL, saved, app_ref)) < 0)
@@ -1367,7 +1367,7 @@ H5FD_get_fs_type_map(const H5FD_t *file, H5FD_mem_t *type_map)
     } /* end if */
     else
         /* Copy class's default free space type mapping */
-        HDmemcpy(type_map, file->cls->fl_map, sizeof(file->cls->fl_map));
+        H5MM_memcpy(type_map, file->cls->fl_map, sizeof(file->cls->fl_map));
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
diff --git a/src/H5FDcore.c b/src/H5FDcore.c
index d1a17cd..6db8af6 100644
--- a/src/H5FDcore.c
+++ b/src/H5FDcore.c
@@ -848,7 +848,7 @@ H5FD__core_open(const char *name, unsigned flags, hid_t fapl_id, haddr_t maxaddr
                         HGOTO_ERROR(H5E_FILE, H5E_CANTCOPY, NULL, "image_memcpy callback failed")
                 } /* end if */
                 else
-                    HDmemcpy(file->mem, file_image_info.buffer, size);
+                    H5MM_memcpy(file->mem, file_image_info.buffer, size);
             } /* end if */
             /* Read in existing data from the file if there is no image */
             else {
@@ -1300,7 +1300,7 @@ H5FD__core_read(H5FD_t *_file, H5FD_mem_t H5_ATTR_UNUSED type, hid_t H5_ATTR_UNU
         nbytes = MIN(size,(size_t)(file->eof-addr));
 #endif /* NDEBUG */
 
-        HDmemcpy(buf, file->mem + addr, nbytes);
+        H5MM_memcpy(buf, file->mem + addr, nbytes);
         size -= nbytes;
         addr += nbytes;
         buf = (char *)buf + nbytes;
@@ -1386,7 +1386,7 @@ H5FD__core_write(H5FD_t *_file, H5FD_mem_t H5_ATTR_UNUSED type, hid_t H5_ATTR_UN
     }
 
     /* Write from BUF to memory */
-    HDmemcpy(file->mem + addr, buf, size);
+    H5MM_memcpy(file->mem + addr, buf, size);
 
     /* Mark memory buffer as modified */
     file->dirty = TRUE;
diff --git a/src/H5FDdirect.c b/src/H5FDdirect.c
index 10c368a..33a0ef4 100644
--- a/src/H5FDdirect.c
+++ b/src/H5FDdirect.c
@@ -422,7 +422,7 @@ H5FD_direct_fapl_copy(const void *_old_fa)
     HDassert(new_fa);
 
     /* Copy the general information */
-    HDmemcpy(new_fa, old_fa, sizeof(H5FD_direct_fapl_t));
+    H5MM_memcpy(new_fa, old_fa, sizeof(H5FD_direct_fapl_t));
 
     FUNC_LEAVE_NOAPI(new_fa)
 } /* end H5FD_direct_fapl_copy() */
@@ -976,12 +976,12 @@ H5FD_direct_read(H5FD_t *_file, H5FD_mem_t H5_ATTR_UNUSED type, hid_t H5_ATTR_UN
                  * next section of data. */
         p2 = (unsigned char*)copy_buf + copy_offset;
         if((copy_size + copy_offset) <= alloc_size) {
-            HDmemcpy(buf, p2, copy_size);
+            H5MM_memcpy(buf, p2, copy_size);
             buf = (unsigned char *)buf + copy_size;
             copy_size = 0;
                 } /* end if */
                 else {
-                    HDmemcpy(buf, p2, alloc_size - copy_offset);
+                    H5MM_memcpy(buf, p2, alloc_size - copy_offset);
                     buf = (unsigned char*)buf + alloc_size - copy_offset;
                     copy_size -= alloc_size - copy_offset;
                     copy_offset = 0;
@@ -1189,11 +1189,11 @@ H5FD_direct_write(H5FD_t *_file, H5FD_mem_t H5_ATTR_UNUSED type, hid_t H5_ATTR_U
          */
         p1 = (unsigned char *)copy_buf + copy_offset;
         if((copy_size + copy_offset) <= alloc_size) {
-                    HDmemcpy(p1, p3, copy_size);
+                    H5MM_memcpy(p1, p3, copy_size);
                     copy_size = 0;
                 } /* end if */
                 else {
-                    HDmemcpy(p1, p3, alloc_size - copy_offset);
+                    H5MM_memcpy(p1, p3, alloc_size - copy_offset);
                     p3 = (const unsigned char *)p3 + (alloc_size - copy_offset);
                     copy_size -= alloc_size - copy_offset;
                     copy_offset = 0;
diff --git a/src/H5FDfamily.c b/src/H5FDfamily.c
index 4d40cf3..047fb25 100644
--- a/src/H5FDfamily.c
+++ b/src/H5FDfamily.c
@@ -411,7 +411,7 @@ H5FD_family_fapl_copy(const void *_old_fa)
         HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
 
     /* Copy the fields of the structure */
-    HDmemcpy(new_fa, old_fa, sizeof(H5FD_family_fapl_t));
+    H5MM_memcpy(new_fa, old_fa, sizeof(H5FD_family_fapl_t));
 
     /* Deep copy the property list objects in the structure */
     if(old_fa->memb_fapl_id==H5P_FILE_ACCESS_DEFAULT) {
diff --git a/src/H5FDlog.c b/src/H5FDlog.c
index 655d7d3..06a0e61 100644
--- a/src/H5FDlog.c
+++ b/src/H5FDlog.c
@@ -405,7 +405,7 @@ H5FD_log_fapl_copy(const void *_old_fa)
         HGOTO_ERROR(H5E_FILE, H5E_CANTALLOC, NULL, "unable to allocate log file FAPL")
 
     /* Copy the general information */
-    HDmemcpy(new_fa, old_fa, sizeof(H5FD_log_fapl_t));
+    H5MM_memcpy(new_fa, old_fa, sizeof(H5FD_log_fapl_t));
 
     /* Deep copy the log file name */
     if(old_fa->logfile != NULL)
diff --git a/src/H5FDmpio.c b/src/H5FDmpio.c
index 3ab90aa..d5aa170 100644
--- a/src/H5FDmpio.c
+++ b/src/H5FDmpio.c
@@ -745,7 +745,7 @@ if(H5FD_mpio_Debug[(int)'t'])
         HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
 
     /* Copy the general information */
-    HDmemcpy(new_fa, old_fa, sizeof(H5FD_mpio_fapl_t));
+    H5MM_memcpy(new_fa, old_fa, sizeof(H5FD_mpio_fapl_t));
 
     /* Duplicate communicator and Info object. */
     if(H5FD_mpi_comm_info_dup(old_fa->comm, old_fa->info, &new_fa->comm, &new_fa->info) < 0)
diff --git a/src/H5FL.c b/src/H5FL.c
index 21bbf02..a662713 100644
--- a/src/H5FL.c
+++ b/src/H5FL.c
@@ -1142,7 +1142,7 @@ H5FL_blk_realloc(H5FL_blk_head_t *head, void *block, size_t new_size H5FL_TRACK_
             if((ret_value=H5FL_blk_malloc(head,new_size H5FL_TRACK_INFO_INT))==NULL)
                 HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed for block")
             blk_size=MIN(new_size,temp->size);
-            HDmemcpy(ret_value,block,blk_size);
+            H5MM_memcpy(ret_value,block,blk_size);
             H5FL_blk_free(head,block);
         } /* end if */
         else {
@@ -1630,7 +1630,7 @@ H5FL_arr_realloc(H5FL_arr_head_t *head, void * obj, size_t new_elem)
 
             /* Copy the appropriate amount of elements */
             blk_size = head->list_arr[MIN(temp->nelem, new_elem)].size;
-            HDmemcpy(ret_value, obj, blk_size);
+            H5MM_memcpy(ret_value, obj, blk_size);
 
             /* Free the old block */
             H5FL_arr_free(head, obj);
diff --git a/src/H5FS.c b/src/H5FS.c
index 8fee634..b71734d 100644
--- a/src/H5FS.c
+++ b/src/H5FS.c
@@ -615,7 +615,7 @@ H5FS__new(const H5F_t *f, uint16_t nclasses, const H5FS_section_class_t *classes
             HDassert(u == classes[u]->type);
 
             /* Copy the class information into the free space manager */
-            HDmemcpy(&fspace->sect_cls[u], classes[u], sizeof(H5FS_section_class_t));
+            H5MM_memcpy(&fspace->sect_cls[u], classes[u], sizeof(H5FS_section_class_t));
 
             /* Call the class initialization routine, if there is one */
             if(fspace->sect_cls[u].init_cls)
diff --git a/src/H5FScache.c b/src/H5FScache.c
index ac0874e..b0b282a 100644
--- a/src/H5FScache.c
+++ b/src/H5FScache.c
@@ -707,7 +707,7 @@ H5FS__cache_hdr_serialize(const H5F_t *f, void *_image, size_t len,
                   (fspace->alloc_sect_size == (size_t)fspace->sect_size)));
 
     /* Magic number */
-    HDmemcpy(image, H5FS_HDR_MAGIC, (size_t)H5_SIZEOF_MAGIC);
+    H5MM_memcpy(image, H5FS_HDR_MAGIC, (size_t)H5_SIZEOF_MAGIC);
     image += H5_SIZEOF_MAGIC;
 
     /* Version # */
@@ -1265,7 +1265,7 @@ H5FS__cache_sinfo_serialize(const H5F_t *f, void *_image, size_t len,
     HDassert(fspace->sect_cls);
 
     /* Magic number */
-    HDmemcpy(image, H5FS_SINFO_MAGIC, (size_t)H5_SIZEOF_MAGIC);
+    H5MM_memcpy(image, H5FS_SINFO_MAGIC, (size_t)H5_SIZEOF_MAGIC);
     image += H5_SIZEOF_MAGIC;
 
     /* Version # */
diff --git a/src/H5Faccum.c b/src/H5Faccum.c
index 0b33f8e..053aad2 100644
--- a/src/H5Faccum.c
+++ b/src/H5Faccum.c
@@ -198,7 +198,7 @@ H5F__accum_read(H5F_t *f, H5FD_mem_t map_type, haddr_t addr,
                 } /* end if */
 
                 /* Copy the data out of the buffer */
-                HDmemcpy(buf, accum->buf + (addr - new_addr), size);
+                H5MM_memcpy(buf, accum->buf + (addr - new_addr), size);
 
                 /* Adjust the accumulator address & size */
                 accum->loc = new_addr;
@@ -250,7 +250,7 @@ H5F__accum_read(H5F_t *f, H5FD_mem_t map_type, haddr_t addr,
                 } /* end else */
 
                 /* Copy the dirty region to buffer */
-                HDmemcpy((unsigned char *)buf + buf_off, (unsigned char *)accum->buf + accum->dirty_off + dirty_off, overlap_size);
+                H5MM_memcpy((unsigned char *)buf + buf_off, (unsigned char *)accum->buf + accum->dirty_off + dirty_off, overlap_size);
             } /* end if */
         } /* end else */
     } /* end if */
@@ -457,7 +457,7 @@ H5F__accum_write(H5F_t *f, H5FD_mem_t map_type, haddr_t addr,
                     HDmemmove(accum->buf + size, accum->buf, accum->size);
 
                     /* Copy the new metadata at the front */
-                    HDmemcpy(accum->buf, buf, size);
+                    H5MM_memcpy(accum->buf, buf, size);
 
                     /* Set the new size & location of the metadata accumulator */
                     accum->loc = addr;
@@ -479,7 +479,7 @@ H5F__accum_write(H5F_t *f, H5FD_mem_t map_type, haddr_t addr,
                         HGOTO_ERROR(H5E_IO, H5E_CANTRESIZE, FAIL, "can't adjust metadata accumulator")
 
                     /* Copy the new metadata to the end */
-                    HDmemcpy(accum->buf + accum->size, buf, size);
+                    H5MM_memcpy(accum->buf + accum->size, buf, size);
 
                     /* Adjust the dirty region and mark accumulator dirty */
                     if(accum->dirty)
@@ -502,7 +502,7 @@ H5F__accum_write(H5F_t *f, H5FD_mem_t map_type, haddr_t addr,
                         size_t dirty_off = (size_t)(addr - accum->loc);
 
                         /* Copy the new metadata to the proper location within the accumulator */
-                        HDmemcpy(accum->buf + dirty_off, buf, size);
+                        H5MM_memcpy(accum->buf + dirty_off, buf, size);
 
                         /* Adjust the dirty region and mark accumulator dirty */
                         if(accum->dirty) {
@@ -545,7 +545,7 @@ H5F__accum_write(H5F_t *f, H5FD_mem_t map_type, haddr_t addr,
                         HDmemmove(accum->buf + size, accum->buf + old_offset, (accum->size - old_offset));
 
                         /* Copy the new metadata at the front */
-                        HDmemcpy(accum->buf, buf, size);
+                        H5MM_memcpy(accum->buf, buf, size);
 
                         /* Set the new size & location of the metadata accumulator */
                         accum->loc = addr;
@@ -582,7 +582,7 @@ H5F__accum_write(H5F_t *f, H5FD_mem_t map_type, haddr_t addr,
                         dirty_off = (size_t)(addr - accum->loc);
 
                         /* Copy the new metadata to the end */
-                        HDmemcpy(accum->buf + dirty_off, buf, size);
+                        H5MM_memcpy(accum->buf + dirty_off, buf, size);
 
                         /* Set the new size of the metadata accumulator */
                         accum->size += add_size;
@@ -625,7 +625,7 @@ H5F__accum_write(H5F_t *f, H5FD_mem_t map_type, haddr_t addr,
                         } /* end if */
 
                         /* Copy the new metadata to the buffer */
-                        HDmemcpy(accum->buf, buf, size);
+                        H5MM_memcpy(accum->buf, buf, size);
 
                         /* Set the new size & location of the metadata accumulator */
                         accum->loc = addr;
@@ -688,7 +688,7 @@ H5F__accum_write(H5F_t *f, H5FD_mem_t map_type, haddr_t addr,
                     accum->size = size;
 
                     /* Store the piece of metadata in the accumulator */
-                    HDmemcpy(accum->buf, buf, size);
+                    H5MM_memcpy(accum->buf, buf, size);
 
                     /* Adjust the dirty region and mark accumulator dirty */
                     accum->dirty_off = 0;
@@ -721,7 +721,7 @@ H5F__accum_write(H5F_t *f, H5FD_mem_t map_type, haddr_t addr,
                 accum->size = size;
 
                 /* Store the piece of metadata in the accumulator */
-                HDmemcpy(accum->buf, buf, size);
+                H5MM_memcpy(accum->buf, buf, size);
 
                 /* Adjust the dirty region and mark accumulator dirty */
                 accum->dirty_off = 0;
diff --git a/src/H5Fint.c b/src/H5Fint.c
index 8a7019d..5775275 100644
--- a/src/H5Fint.c
+++ b/src/H5Fint.c
@@ -3254,7 +3254,7 @@ H5F_get_metadata_read_retry_info(H5F_t *file, H5F_retry_info_t *info)
                         HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
 
                     /* Copy the information */
-                    HDmemcpy(info->retries[j], file->shared->retries[i], tot_size);
+                    H5MM_memcpy(info->retries[j], file->shared->retries[i], tot_size);
                 }
 
                 /* Increment location in info->retries[] array */
diff --git a/src/H5Fprivate.h b/src/H5Fprivate.h
index 5f7a1b2..94f66c6 100644
--- a/src/H5Fprivate.h
+++ b/src/H5Fprivate.h
@@ -134,7 +134,7 @@ typedef struct H5F_t H5F_t;
                                         \
     HDcompile_assert(sizeof(double) == 8);                      \
     HDcompile_assert(sizeof(double) == sizeof(uint64_t));              \
-    HDmemcpy(&_n, &n, sizeof(double));                          \
+    H5MM_memcpy(&_n, &n, sizeof(double));                          \
     for(_u = 0; _u < sizeof(uint64_t); _u++, _n >>= 8)                  \
         *_p++ = (uint8_t)(_n & 0xff);                          \
     (p) = (uint8_t *)(p) + 8;                              \
@@ -240,7 +240,7 @@ typedef struct H5F_t H5F_t;
     (p) += 8;                                      \
     for(_u = 0; _u < sizeof(uint64_t); _u++)                      \
         _n = (_n << 8) | *(--p);                          \
-    HDmemcpy(&(n), &_n, sizeof(double));                          \
+    H5MM_memcpy(&(n), &_n, sizeof(double));                          \
     (p) += 8;                                      \
 }
 
diff --git a/src/H5Fsuper.c b/src/H5Fsuper.c
index 489cc21..3c225a2 100644
--- a/src/H5Fsuper.c
+++ b/src/H5Fsuper.c
@@ -555,7 +555,7 @@ H5F__super_read(H5F_t *f, H5P_genplist_t *fa_plist, hbool_t initial_read)
         /* Set the B-tree internal node values, etc */
         if(H5P_set(c_plist, H5F_CRT_BTREE_RANK_NAME, udata.btree_k) < 0)
             HGOTO_ERROR(H5E_FILE, H5E_CANTSET, FAIL, "unable to set rank for btree internal nodes")
-        HDmemcpy(sblock->btree_k, udata.btree_k, sizeof(unsigned) * (size_t)H5B_NUM_BTREE_ID);
+        H5MM_memcpy(sblock->btree_k, udata.btree_k, sizeof(unsigned) * (size_t)H5B_NUM_BTREE_ID);
     } /* end if */
     else {
         /* Get the (default) B-tree internal node values, etc */
diff --git a/src/H5Fsuper_cache.c b/src/H5Fsuper_cache.c
index 361f8a1..125d6cf 100644
--- a/src/H5Fsuper_cache.c
+++ b/src/H5Fsuper_cache.c
@@ -269,7 +269,7 @@ H5F__drvrinfo_prefix_decode(H5O_drvinfo_t *drvrinfo, char *drv_name,
 
     /* Driver name and/or version */
     if(drv_name) { 
-        HDmemcpy(drv_name, (const char *)image, (size_t)8);
+        H5MM_memcpy(drv_name, (const char *)image, (size_t)8);
         drv_name[8] = '\0';
         image += 8; /* advance past name/version */
     } /* end if */
@@ -682,7 +682,7 @@ H5F__cache_superblock_serialize(const H5F_t *f, void *_image, size_t H5_ATTR_UNU
     HDassert(sblock->cache_info.flush_me_last);    
 
     /* Encode the common portion of the file superblock for all versions */
-    HDmemcpy(image, H5F_SIGNATURE, (size_t)H5F_SIGNATURE_LEN);
+    H5MM_memcpy(image, H5F_SIGNATURE, (size_t)H5F_SIGNATURE_LEN);
     image += H5F_SIGNATURE_LEN;
     *image++ = (uint8_t)sblock->super_vers;
 
diff --git a/src/H5Gbtree2.c b/src/H5Gbtree2.c
index 721d591..425cc14 100644
--- a/src/H5Gbtree2.c
+++ b/src/H5Gbtree2.c
@@ -206,7 +206,7 @@ H5G_dense_btree2_name_store(void *_nrecord, const void *_udata)
 
     /* Copy user information info native record */
     nrecord->hash = udata->common.name_hash;
-    HDmemcpy(nrecord->id, udata->id, (size_t)H5G_DENSE_FHEAP_ID_LEN);
+    H5MM_memcpy(nrecord->id, udata->id, (size_t)H5G_DENSE_FHEAP_ID_LEN);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* H5G_dense_btree2_name_store() */
@@ -305,7 +305,7 @@ H5G_dense_btree2_name_encode(uint8_t *raw, const void *_nrecord, void H5_ATTR_UN
 
     /* Encode the record's fields */
     UINT32ENCODE(raw, nrecord->hash)
-    HDmemcpy(raw, nrecord->id, (size_t)H5G_DENSE_FHEAP_ID_LEN);
+    H5MM_memcpy(raw, nrecord->id, (size_t)H5G_DENSE_FHEAP_ID_LEN);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* H5G_dense_btree2_name_encode() */
@@ -333,7 +333,7 @@ H5G_dense_btree2_name_decode(const uint8_t *raw, void *_nrecord, void H5_ATTR_UN
 
     /* Decode the record's fields */
     UINT32DECODE(raw, nrecord->hash)
-    HDmemcpy(nrecord->id, raw, (size_t)H5G_DENSE_FHEAP_ID_LEN);
+    H5MM_memcpy(nrecord->id, raw, (size_t)H5G_DENSE_FHEAP_ID_LEN);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* H5G_dense_btree2_name_decode() */
@@ -393,7 +393,7 @@ H5G_dense_btree2_corder_store(void *_nrecord, const void *_udata)
 
     /* Copy user information info native record */
     nrecord->corder = udata->common.corder;
-    HDmemcpy(nrecord->id, udata->id, (size_t)H5G_DENSE_FHEAP_ID_LEN);
+    H5MM_memcpy(nrecord->id, udata->id, (size_t)H5G_DENSE_FHEAP_ID_LEN);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* H5G_dense_btree2_corder_store() */
@@ -469,7 +469,7 @@ H5G_dense_btree2_corder_encode(uint8_t *raw, const void *_nrecord, void H5_ATTR_
 
     /* Encode the record's fields */
     INT64ENCODE(raw, nrecord->corder)
-    HDmemcpy(raw, nrecord->id, (size_t)H5G_DENSE_FHEAP_ID_LEN);
+    H5MM_memcpy(raw, nrecord->id, (size_t)H5G_DENSE_FHEAP_ID_LEN);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* H5G_dense_btree2_corder_encode() */
@@ -497,7 +497,7 @@ H5G_dense_btree2_corder_decode(const uint8_t *raw, void *_nrecord, void H5_ATTR_
 
     /* Decode the record's fields */
     INT64DECODE(raw, nrecord->corder)
-    HDmemcpy(nrecord->id, raw, (size_t)H5G_DENSE_FHEAP_ID_LEN);
+    H5MM_memcpy(nrecord->id, raw, (size_t)H5G_DENSE_FHEAP_ID_LEN);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* H5G_dense_btree2_corder_decode() */
diff --git a/src/H5Gcache.c b/src/H5Gcache.c
index b447cad..7387eae 100644
--- a/src/H5Gcache.c
+++ b/src/H5Gcache.c
@@ -287,7 +287,7 @@ H5G__cache_node_serialize(const H5F_t *f, void *_image, size_t len,
     HDassert(len == sym->node_size);
 
     /* magic number */
-    HDmemcpy(image, H5G_NODE_MAGIC, (size_t)H5_SIZEOF_MAGIC);
+    H5MM_memcpy(image, H5G_NODE_MAGIC, (size_t)H5_SIZEOF_MAGIC);
     image += H5_SIZEOF_MAGIC;
 
     /* version number */
diff --git a/src/H5Gent.c b/src/H5Gent.c
index baee35c..276da73 100644
--- a/src/H5Gent.c
+++ b/src/H5Gent.c
@@ -331,7 +331,7 @@ H5G__ent_copy(H5G_entry_t *dst, const H5G_entry_t *src, H5_copy_depth_t depth)
     HDassert(depth == H5_COPY_SHALLOW || depth == H5_COPY_DEEP);
 
     /* Copy the top level information */
-    HDmemcpy(dst, src, sizeof(H5G_entry_t));
+    H5MM_memcpy(dst, src, sizeof(H5G_entry_t));
 
     /* Deep copy the names */
     if(depth == H5_COPY_DEEP) {
diff --git a/src/H5Gname.c b/src/H5Gname.c
index 2aece2b..fa0a925 100644
--- a/src/H5Gname.c
+++ b/src/H5Gname.c
@@ -522,7 +522,7 @@ H5G_name_copy(H5G_name_t *dst, const H5G_name_t *src, H5_copy_depth_t depth)
     HDassert(depth == H5_COPY_SHALLOW || depth == H5_COPY_DEEP);
 
     /* Copy the top level information */
-    HDmemcpy(dst, src, sizeof(H5G_name_t));
+    H5MM_memcpy(dst, src, sizeof(H5G_name_t));
 
     /* Deep copy the names */
     if(depth == H5_COPY_DEEP) {
diff --git a/src/H5Gnode.c b/src/H5Gnode.c
index 72b3633..b79b7d2 100644
--- a/src/H5Gnode.c
+++ b/src/H5Gnode.c
@@ -672,7 +672,7 @@ H5G__node_insert(H5F_t *f, haddr_t addr, void H5_ATTR_UNUSED *_lt_key,
         if(NULL == (snrt = (H5G_node_t *)H5AC_protect(f, H5AC_SNODE, *new_node_p, f, H5AC__NO_FLAGS_SET)))
             HGOTO_ERROR(H5E_SYM, H5E_CANTLOAD, H5B_INS_ERROR, "unable to split symbol table node")
 
-        HDmemcpy(snrt->entry, sn->entry + H5F_SYM_LEAF_K(f),
+        H5MM_memcpy(snrt->entry, sn->entry + H5F_SYM_LEAF_K(f),
             H5F_SYM_LEAF_K(f) * sizeof(H5G_entry_t));
         snrt->nsyms = H5F_SYM_LEAF_K(f);
         snrt_flags |= H5AC__DIRTIED_FLAG;
@@ -1262,7 +1262,7 @@ H5G__node_copy(H5F_t *f, const void H5_ATTR_UNUSED *_lt_key, haddr_t addr,
             char *link_name;            /* Pointer to value of soft link */
 
             /* Make a temporary copy, so that it will not change the info in the cache */
-            HDmemcpy(&tmp_src_ent, src_ent, sizeof(H5G_entry_t));
+            H5MM_memcpy(&tmp_src_ent, src_ent, sizeof(H5G_entry_t));
 
             /* Set up group location for soft link to start in */
             H5G_name_reset(&grp_path);
diff --git a/src/H5Gtraverse.c b/src/H5Gtraverse.c
index d029bea..492b5b9 100644
--- a/src/H5Gtraverse.c
+++ b/src/H5Gtraverse.c
@@ -555,7 +555,7 @@ H5G__traverse_real(const H5G_loc_t *_loc, const char *name, unsigned target,
 	 * Copy the component name into a null-terminated buffer so
 	 * we can pass it down to the other symbol table functions.
 	 */
-	HDmemcpy(comp, name, nchars);
+	H5MM_memcpy(comp, name, nchars);
 	comp[nchars] = '\0';
 
 	/*
@@ -670,7 +670,7 @@ H5G__traverse_real(const H5G_loc_t *_loc, const char *name, unsigned target,
                     /* Only keep the creation order information from the parent
                      *  group's link info
                      */
-                    HDmemcpy(&tmp_linfo, &def_linfo, sizeof(H5O_linfo_t));
+                    H5MM_memcpy(&tmp_linfo, &def_linfo, sizeof(H5O_linfo_t));
                     tmp_linfo.track_corder = par_linfo.track_corder;
                     tmp_linfo.index_corder = par_linfo.index_corder;
                     linfo = &tmp_linfo;
diff --git a/src/H5HF.c b/src/H5HF.c
index 3df7e7b..77ea6f8 100644
--- a/src/H5HF.c
+++ b/src/H5HF.c
@@ -104,7 +104,7 @@ H5HF_op_read(const void *obj, size_t obj_len, void *op_data)
     FUNC_ENTER_NOAPI_NOINIT_NOERR
 
     /* Perform "read", using memcpy() */
-    HDmemcpy(op_data, obj, obj_len);
+    H5MM_memcpy(op_data, obj, obj_len);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5HF_op_read() */
@@ -129,7 +129,7 @@ H5HF_op_write(const void *obj, size_t obj_len, void *op_data)
     FUNC_ENTER_NOAPI_NOINIT_NOERR
 
     /* Perform "write", using memcpy() */
-    HDmemcpy((void *)obj, op_data, obj_len);    /* Casting away const OK -QAK */
+    H5MM_memcpy((void *)obj, op_data, obj_len);    /* Casting away const OK -QAK */
 
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5HF_op_write() */
diff --git a/src/H5HFcache.c b/src/H5HFcache.c
index 0c5d3aa..2d1c1f2 100644
--- a/src/H5HFcache.c
+++ b/src/H5HFcache.c
@@ -772,7 +772,7 @@ H5HF__cache_hdr_serialize(const H5F_t *f, void *_image, size_t len,
     hdr->f = f;
 
     /* Magic number */
-    HDmemcpy(image, H5HF_HDR_MAGIC, (size_t)H5_SIZEOF_MAGIC);
+    H5MM_memcpy(image, H5HF_HDR_MAGIC, (size_t)H5_SIZEOF_MAGIC);
     image += H5_SIZEOF_MAGIC;
 
     /* Version # */
@@ -1362,7 +1362,7 @@ H5HF__cache_iblock_serialize(const H5F_t *f, void *_image, size_t len,
     hdr->f = f;
 
     /* Magic number */
-    HDmemcpy(image, H5HF_IBLOCK_MAGIC, (size_t)H5_SIZEOF_MAGIC);
+    H5MM_memcpy(image, H5HF_IBLOCK_MAGIC, (size_t)H5_SIZEOF_MAGIC);
     image += H5_SIZEOF_MAGIC;
 
     /* Version # */
@@ -1677,7 +1677,7 @@ H5HF__cache_dblock_verify_chksum(const void *_image, size_t len, void *_udata)
         /* Set up parameters for filter pipeline */
         nbytes = len;
         filter_mask = udata->filter_mask;
-        HDmemcpy(read_buf, image, len);
+        H5MM_memcpy(read_buf, image, len);
 
         /* Push direct block data through I/O filter pipeline */
         if(H5Z_pipeline(&(hdr->pline), H5Z_FLAG_REVERSE, &filter_mask, H5Z_ENABLE_EDC, filter_cb, &nbytes, &len, &read_buf) < 0)
@@ -1724,7 +1724,7 @@ H5HF__cache_dblock_verify_chksum(const void *_image, size_t len, void *_udata)
 	    HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
 
 	/* Copy un-filtered data into block's buffer */
-	HDmemcpy(udata->dblk, read_buf, len);
+	H5MM_memcpy(udata->dblk, read_buf, len);
     } /* end if */
 
 done:
@@ -1829,7 +1829,7 @@ H5HF__cache_dblock_deserialize(const void *_image, size_t len, void *_udata,
                 HGOTO_ERROR(H5E_HEAP, H5E_NOSPACE, NULL, "memory allocation failed for pipeline buffer")
 
             /* Copy compressed image into buffer */
-            HDmemcpy(read_buf, image, len);
+            H5MM_memcpy(read_buf, image, len);
 
             /* Push direct block data through I/O filter pipeline */
             nbytes = len;
@@ -1841,7 +1841,7 @@ H5HF__cache_dblock_deserialize(const void *_image, size_t len, void *_udata,
             HDassert(nbytes == dblock->size);
 
             /* Copy un-filtered data into block's buffer */
-            HDmemcpy(dblock->blk, read_buf, dblock->size);
+            H5MM_memcpy(dblock->blk, read_buf, dblock->size);
         } /* end if */
     } /* end if */
     else {
@@ -1856,7 +1856,7 @@ H5HF__cache_dblock_deserialize(const void *_image, size_t len, void *_udata,
 
         /* Copy image to dblock->blk */
         HDassert(dblock->size == len);
-        HDmemcpy(dblock->blk, image, dblock->size);
+        H5MM_memcpy(dblock->blk, image, dblock->size);
     } /* end else */
 
     /* Start decoding direct block */
@@ -2146,7 +2146,7 @@ H5HF__cache_dblock_pre_serialize(H5F_t *f, void *_thing,
     image = dblock->blk;
 
     /* Magic number */
-    HDmemcpy(image, H5HF_DBLOCK_MAGIC, (size_t)H5_SIZEOF_MAGIC);
+    H5MM_memcpy(image, H5HF_DBLOCK_MAGIC, (size_t)H5_SIZEOF_MAGIC);
     image += H5_SIZEOF_MAGIC;
 
     /* Version # */
@@ -2201,7 +2201,7 @@ H5HF__cache_dblock_pre_serialize(H5F_t *f, void *_thing,
             HGOTO_ERROR(H5E_HEAP, H5E_NOSPACE, FAIL, "memory allocation failed for pipeline buffer")
 
         /* Copy the direct block's image into the buffer to compress */
-        HDmemcpy(write_buf, dblock->blk, write_size);
+        H5MM_memcpy(write_buf, dblock->blk, write_size);
 
         /* Push direct block data through I/O filter pipeline */
         nbytes = write_size;
@@ -2460,7 +2460,7 @@ H5HF__cache_dblock_serialize(const H5F_t *f, void *image, size_t len,
     HDassert(dblock->write_size == len);
 
     /* Copy the image from *(dblock->write_buf) to *image */
-    HDmemcpy(image, dblock->write_buf, dblock->write_size);
+    H5MM_memcpy(image, dblock->write_buf, dblock->write_size);
 
     /* Free *(dblock->write_buf) if it was allocated by the 
      * pre-serialize function 
diff --git a/src/H5HFhdr.c b/src/H5HFhdr.c
index b014017..5a9b161 100644
--- a/src/H5HFhdr.c
+++ b/src/H5HFhdr.c
@@ -387,7 +387,7 @@ H5HF_hdr_create(H5F_t *f, const H5HF_create_t *cparam)
     /* Set the creation parameters for the heap */
     hdr->max_man_size = cparam->max_man_size;
     hdr->checksum_dblocks = cparam->checksum_dblocks;
-    HDmemcpy(&(hdr->man_dtable.cparam), &(cparam->managed), sizeof(H5HF_dtable_cparam_t));
+    H5MM_memcpy(&(hdr->man_dtable.cparam), &(cparam->managed), sizeof(H5HF_dtable_cparam_t));
 
     /* Set root table address to indicate that the heap is empty currently */
     hdr->man_dtable.table_addr = HADDR_UNDEF;
diff --git a/src/H5HFhuge.c b/src/H5HFhuge.c
index 6e475ad..d496d62 100644
--- a/src/H5HFhuge.c
+++ b/src/H5HFhuge.c
@@ -355,7 +355,7 @@ HDfprintf(stderr, "%s: obj_size = %Zu\n", FUNC, obj_size);
         write_size = obj_size;
         if(NULL == (write_buf = H5MM_malloc(write_size)))
             HGOTO_ERROR(H5E_HEAP, H5E_NOSPACE, FAIL, "memory allocation failed for pipeline buffer")
-        HDmemcpy(write_buf, obj, write_size);
+        H5MM_memcpy(write_buf, obj, write_size);
 
         /* Push direct block data through I/O filter pipeline */
         nbytes = write_size;
@@ -794,7 +794,7 @@ H5HF__huge_op_real(H5HF_hdr_t *hdr, const uint8_t *id, hbool_t is_read,
         /* Copy object to user's buffer if there's filters on heap data */
         /* (if there's no filters, the object was read directly into the user's buffer) */
         if(hdr->filter_len > 0)
-            HDmemcpy(op_data, read_buf, (size_t)obj_size);
+            H5MM_memcpy(op_data, read_buf, (size_t)obj_size);
     } /* end if */
     else {
         /* Call the user's 'op' callback */
diff --git a/src/H5HFman.c b/src/H5HFman.c
index 7f90f49..e5b5cb8 100644
--- a/src/H5HFman.c
+++ b/src/H5HFman.c
@@ -183,7 +183,7 @@ H5HF__man_insert(H5HF_hdr_t *hdr, size_t obj_size, const void *obj, void *_id)
         p = dblock->blk + blk_off;
 
         /* Copy the object's data into the heap */
-        HDmemcpy(p, obj, obj_size);
+        H5MM_memcpy(p, obj, obj_size);
         p += obj_size;
 
         /* Sanity check */
diff --git a/src/H5HFsection.c b/src/H5HFsection.c
index 36e966e..f5ac8e5 100644
--- a/src/H5HFsection.c
+++ b/src/H5HFsection.c
@@ -3082,7 +3082,7 @@ H5HF__sect_indirect_reduce_row(H5HF_hdr_t *hdr, H5HF_free_section_t *row_sect,
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, FAIL, "allocation failed for row section pointer array")
 
             /* Transfer row sections between current & peer sections */
-            HDmemcpy(&peer_sect->u.indirect.dir_rows[0],
+            H5MM_memcpy(&peer_sect->u.indirect.dir_rows[0],
                 &sect->u.indirect.dir_rows[0],
                 (sizeof(H5HF_free_section_t *) * peer_dir_nrows));
             HDmemmove(&sect->u.indirect.dir_rows[0],
@@ -3321,7 +3321,7 @@ H5HF__sect_indirect_reduce(H5HF_hdr_t *hdr, H5HF_free_section_t *sect,
                 HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, FAIL, "allocation failed for indirect section pointer array")
 
             /* Transfer child indirect sections between current & peer sections */
-            HDmemcpy(&peer_sect->u.indirect.indir_ents[0],
+            H5MM_memcpy(&peer_sect->u.indirect.indir_ents[0],
                 &sect->u.indirect.indir_ents[sect->u.indirect.indir_nents - peer_nentries],
                 (sizeof(H5HF_free_section_t *) * peer_nentries));
             sect->u.indirect.indir_nents -= (peer_nentries + 1); /* Transferred blocks, plus child entry */
@@ -3636,7 +3636,7 @@ H5HF__sect_indirect_merge_row(H5HF_hdr_t *hdr, H5HF_free_section_t *row_sect1,
             sect1->u.indirect.dir_rows = new_dir_rows;
 
             /* Transfer the second section's rows to first section */
-            HDmemcpy(&sect1->u.indirect.dir_rows[sect1->u.indirect.dir_nrows],
+            H5MM_memcpy(&sect1->u.indirect.dir_rows[sect1->u.indirect.dir_nrows],
                 &sect2->u.indirect.dir_rows[src_row2],
                 (sizeof(H5HF_free_section_t *) * nrows_moved2));
 
@@ -3682,7 +3682,7 @@ H5HF__sect_indirect_merge_row(H5HF_hdr_t *hdr, H5HF_free_section_t *row_sect1,
             sect1->u.indirect.indir_ents = new_indir_ents;
 
             /* Transfer the second section's entries to first section */
-            HDmemcpy(&sect1->u.indirect.indir_ents[sect1->u.indirect.indir_nents],
+            H5MM_memcpy(&sect1->u.indirect.indir_ents[sect1->u.indirect.indir_nents],
                 &sect2->u.indirect.indir_ents[0],
                 (sizeof(H5HF_free_section_t *) * sect2->u.indirect.indir_nents));
         } /* end else */
diff --git a/src/H5HFtest.c b/src/H5HFtest.c
index 1b1f688..0ddcb34 100644
--- a/src/H5HFtest.c
+++ b/src/H5HFtest.c
@@ -100,7 +100,7 @@ H5HF_get_cparam_test(const H5HF_t *fh, H5HF_create_t *cparam)
     else
         H5_CHECKED_ASSIGN(cparam->id_len, uint16_t, fh->hdr->id_len, unsigned);
     cparam->max_man_size = fh->hdr->max_man_size;
-    HDmemcpy(&(cparam->managed), &(fh->hdr->man_dtable.cparam), sizeof(H5HF_dtable_cparam_t));
+    H5MM_memcpy(&(cparam->managed), &(fh->hdr->man_dtable.cparam), sizeof(H5HF_dtable_cparam_t));
     H5O_msg_copy(H5O_PLINE_ID, &(fh->hdr->pline), &(cparam->pline));
 
     FUNC_LEAVE_NOAPI(SUCCEED)
diff --git a/src/H5HFtiny.c b/src/H5HFtiny.c
index 5cf1c08..1407861 100644
--- a/src/H5HFtiny.c
+++ b/src/H5HFtiny.c
@@ -176,7 +176,7 @@ HDfprintf(stderr, "%s: obj_size = %Zu\n", FUNC, obj_size);
         *id++ = enc_obj_size & H5HF_TINY_MASK_EXT_2;
     } /* end else */
 
-    HDmemcpy(id, obj, obj_size);
+    H5MM_memcpy(id, obj, obj_size);
     HDmemset(id + obj_size, 0, (hdr->id_len - ((size_t)1 + (size_t)hdr->tiny_len_extended + obj_size)));
 
     /* Update statistics about heap */
diff --git a/src/H5HG.c b/src/H5HG.c
index df1c82d..231294b 100644
--- a/src/H5HG.c
+++ b/src/H5HG.c
@@ -168,7 +168,7 @@ H5HG__create(H5F_t *f, size_t size)
         HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, HADDR_UNDEF, "memory allocation failed")
 
     /* Initialize the header */
-    HDmemcpy(heap->chunk, H5HG_MAGIC, (size_t)H5_SIZEOF_MAGIC);
+    H5MM_memcpy(heap->chunk, H5HG_MAGIC, (size_t)H5_SIZEOF_MAGIC);
     p = heap->chunk + H5_SIZEOF_MAGIC;
     *p++ = H5HG_VERSION;
     *p++ = 0; /*reserved*/
@@ -553,7 +553,7 @@ H5HG_insert(H5F_t *f, size_t size, void *obj, H5HG_t *hobj/*out*/)
 
     /* Copy data into the heap */
     if(size > 0) {
-        HDmemcpy(heap->obj[idx].begin + H5HG_SIZEOF_OBJHDR(f), obj, size);
+        H5MM_memcpy(heap->obj[idx].begin + H5HG_SIZEOF_OBJHDR(f), obj, size);
 #ifdef OLD_WAY
 /* Don't bother zeroing out the rest of the info in the heap -QAK */
         HDmemset(heap->obj[idx].begin + H5HG_SIZEOF_OBJHDR(f) + size, 0,
@@ -618,7 +618,7 @@ H5HG_read(H5F_t *f, H5HG_t *hobj, void *object/*out*/, size_t *buf_size)
     /* Allocate a buffer for the object read in, if the user didn't give one */
     if(!object && NULL == (object = H5MM_malloc(size)))
         HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
-    HDmemcpy(object, p, size);
+    H5MM_memcpy(object, p, size);
 
     /*
      * Advance the heap in the CWFS list. We might have done this already
diff --git a/src/H5HGcache.c b/src/H5HGcache.c
index beaea7b..29e88df 100644
--- a/src/H5HGcache.c
+++ b/src/H5HGcache.c
@@ -271,7 +271,7 @@ H5HG__cache_heap_deserialize(const void *_image, size_t len, void *_udata,
         HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
 
     /* Copy the image buffer into the newly allocate chunk */
-    HDmemcpy(heap->chunk, _image, len);
+    H5MM_memcpy(heap->chunk, _image, len);
 
     /* Deserialize the heap's header */
     if(H5HG__hdr_deserialize(heap, (const uint8_t *)heap->chunk, f) < 0)
@@ -448,7 +448,7 @@ H5HG__cache_heap_serialize(const H5F_t *f, void *image, size_t len,
     HDassert(heap->chunk);
 
     /* copy the image into the buffer */
-    HDmemcpy(image, heap->chunk, len);
+    H5MM_memcpy(image, heap->chunk, len);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5HG__cache_heap_serialize() */
diff --git a/src/H5HL.c b/src/H5HL.c
index 735077c..f290294 100644
--- a/src/H5HL.c
+++ b/src/H5HL.c
@@ -725,7 +725,7 @@ H5HL_insert(H5F_t *f, H5HL_t *heap, size_t buf_size, const void *buf))
     } /* end if */
 
     /* Copy the data into the heap */
-    HDmemcpy(heap->dblk_image + offset, buf, buf_size);
+    H5MM_memcpy(heap->dblk_image + offset, buf, buf_size);
 
     /* Set return value */
     ret_value = offset;
diff --git a/src/H5HLcache.c b/src/H5HLcache.c
index 926f787..2841a4c 100644
--- a/src/H5HLcache.c
+++ b/src/H5HLcache.c
@@ -464,7 +464,7 @@ H5HL__cache_prefix_deserialize(const void *_image, size_t len, void *_udata,
             image = ((const uint8_t *)_image) + heap->prfx_size;
 
             /* Copy the heap data from the speculative read buffer */
-            HDmemcpy(heap->dblk_image, image, heap->dblk_size);
+            H5MM_memcpy(heap->dblk_image, image, heap->dblk_size);
 
             /* Build free list */
             if(H5HL__fl_deserialize(heap) < 0)
@@ -587,7 +587,7 @@ H5HL__cache_prefix_serialize(const H5F_t *f, void *_image, size_t len,
     heap->free_block = heap->freelist ? heap->freelist->offset : H5HL_FREE_NULL;
 
     /* Serialize the heap prefix */
-    HDmemcpy(image, H5HL_MAGIC, (size_t)H5_SIZEOF_MAGIC);
+    H5MM_memcpy(image, H5HL_MAGIC, (size_t)H5_SIZEOF_MAGIC);
     image += H5_SIZEOF_MAGIC;
     *image++ = H5HL_VERSION;
     *image++ = 0;       /*reserved*/
@@ -615,7 +615,7 @@ H5HL__cache_prefix_serialize(const H5F_t *f, void *_image, size_t len,
         H5HL__fl_serialize(heap);
 
         /* Copy the heap data block into the cache image */
-        HDmemcpy(image, heap->dblk_image, heap->dblk_size);
+        H5MM_memcpy(image, heap->dblk_image, heap->dblk_size);
 
         /* Sanity check */
         HDassert((size_t)(image - (uint8_t *)_image) + heap->dblk_size == len);
@@ -756,7 +756,7 @@ H5HL__cache_datablock_deserialize(const void *image, size_t len, void *_udata,
             HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, NULL, "can't allocate data block image buffer");
 
         /* copy the datablock from the read buffer */
-        HDmemcpy(heap->dblk_image, image, len);
+        H5MM_memcpy(heap->dblk_image, image, len);
 
         /* Build free list */
         if(FAIL == H5HL__fl_deserialize(heap))
@@ -851,7 +851,7 @@ H5HL__cache_datablock_serialize(const H5F_t *f, void *image, size_t len,
     H5HL__fl_serialize(heap);
 
     /* Copy the heap's data block into the cache's image */
-    HDmemcpy(image, heap->dblk_image, heap->dblk_size);
+    H5MM_memcpy(image, heap->dblk_image, heap->dblk_size);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5HL__cache_datablock_serialize() */
diff --git a/src/H5L.c b/src/H5L.c
index 1f45740..da0bc7d 100644
--- a/src/H5L.c
+++ b/src/H5L.c
@@ -1676,7 +1676,7 @@ H5L_register(const H5L_class_t *cls)
     } /* end if */
 
     /* Copy link class info into table */
-    HDmemcpy(H5L_table_g + i, cls, sizeof(H5L_class_t));
+    H5MM_memcpy(H5L_table_g + i, cls, sizeof(H5L_class_t));
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -2217,7 +2217,7 @@ H5L__create_ud(const H5G_loc_t *link_loc, const char *link_name,
     /* Fill in UD link-specific information in the link struct*/
     if(ud_data_size > 0) {
         lnk.u.ud.udata = H5MM_malloc((size_t)ud_data_size);
-        HDmemcpy(lnk.u.ud.udata, ud_data, (size_t) ud_data_size);
+        H5MM_memcpy(lnk.u.ud.udata, ud_data, (size_t) ud_data_size);
     } /* end if */
     else
         lnk.u.ud.udata = NULL;
diff --git a/src/H5Lexternal.c b/src/H5Lexternal.c
index 0f3296f..d838d77 100644
--- a/src/H5Lexternal.c
+++ b/src/H5Lexternal.c
@@ -306,7 +306,7 @@ H5L__extern_query(const char H5_ATTR_UNUSED * link_name, const void *_udata, siz
             buf_size = udata_size;
 
         /* Copy the udata verbatim up to buf_size */
-        HDmemcpy(buf, udata, buf_size);
+        H5MM_memcpy(buf, udata, buf_size);
     } /* end if */
 
     /* Set return value */
diff --git a/src/H5MM.c b/src/H5MM.c
index 866dfbe..9e87a2d 100644
--- a/src/H5MM.c
+++ b/src/H5MM.c
@@ -274,7 +274,7 @@ H5MM_malloc(size_t size)
 #if defined H5_MEMORY_ALLOC_SANITY_CHECK
     /* Initialize block list head singleton */
     if(!H5MM_init_s) {
-        HDmemcpy(H5MM_block_head_s.sig, H5MM_block_signature_s, H5MM_SIG_SIZE);
+        H5MM_memcpy(H5MM_block_head_s.sig, H5MM_block_signature_s, H5MM_SIG_SIZE);
         H5MM_block_head_s.next = &H5MM_block_head_s;
         H5MM_block_head_s.prev = &H5MM_block_head_s;
         H5MM_block_head_s.u.info.size = SIZET_MAX;
@@ -291,15 +291,15 @@ H5MM_malloc(size_t size)
 
         if(NULL != (block = (H5MM_block_t *)HDmalloc(alloc_size))) {
             /* Set up block */
-            HDmemcpy(block->sig, H5MM_block_signature_s, H5MM_SIG_SIZE);
+            H5MM_memcpy(block->sig, H5MM_block_signature_s, H5MM_SIG_SIZE);
             block->next = H5MM_block_head_s.next;
             H5MM_block_head_s.next = block;
             block->next->prev = block;
             block->prev = &H5MM_block_head_s;
             block->u.info.size = size;
             block->u.info.in_use = TRUE;
-            HDmemcpy(block->b, H5MM_block_head_guard_s, H5MM_HEAD_GUARD_SIZE);
-            HDmemcpy(block->b + H5MM_HEAD_GUARD_SIZE + size, H5MM_block_tail_guard_s, H5MM_TAIL_GUARD_SIZE);
+            H5MM_memcpy(block->b, H5MM_block_head_guard_s, H5MM_HEAD_GUARD_SIZE);
+            H5MM_memcpy(block->b + H5MM_HEAD_GUARD_SIZE + size, H5MM_block_tail_guard_s, H5MM_TAIL_GUARD_SIZE);
 
             /* Update statistics */
             H5MM_total_alloc_bytes_s += size;
@@ -417,7 +417,7 @@ H5MM_realloc(void *mem, size_t size)
                     H5MM__sanity_check(mem);
 
                     ret_value = H5MM_malloc(size);
-                    HDmemcpy(ret_value, mem, MIN(size, old_size));
+                    H5MM_memcpy(ret_value, mem, MIN(size, old_size));
                     H5MM_xfree(mem);
                 } /* end if */
                 else
@@ -564,3 +564,35 @@ H5MM_xfree(void *mem)
     FUNC_LEAVE_NOAPI(NULL)
 } /* end H5MM_xfree() */
 
+
+/*-------------------------------------------------------------------------
+ * Function:    H5MM_memcpy
+ *
+ * Purpose:     Like memcpy(3) but with a check for buffer overlap.
+ *
+ * Return:      Success:    pointer to dest
+ *              Failure:    NULL
+ *
+ * Programmer:  Dana Robinson
+ *              Spring 2019
+ *
+ *-------------------------------------------------------------------------
+ */
+void *
+H5MM_memcpy(void *dest, const void *src, size_t n)
+{
+    void *ret = NULL;
+
+    /* Use FUNC_ENTER_NOAPI_NOINIT_NOERR here to avoid performance issues */
+    FUNC_ENTER_NOAPI_NOINIT_NOERR
+
+    HDassert(dest);
+    HDassert(src);
+    HDassert(dest >= src + n || src >= dest + n);
+
+    ret = HDmemcpy(dest, src, n);
+
+    FUNC_LEAVE_NOAPI(ret)
+
+} /* end H5MM_memcpy() */
+
diff --git a/src/H5MMprivate.h b/src/H5MMprivate.h
index 0524601..2053215 100644
--- a/src/H5MMprivate.h
+++ b/src/H5MMprivate.h
@@ -45,6 +45,7 @@ H5_DLL void *H5MM_realloc(void *mem, size_t size);
 H5_DLL char *H5MM_xstrdup(const char *s);
 H5_DLL char *H5MM_strdup(const char *s);
 H5_DLL void *H5MM_xfree(void *mem);
+H5_DLL void *H5MM_memcpy(void *dest, const void *src, size_t n);
 #if defined H5_MEMORY_ALLOC_SANITY_CHECK
 H5_DLL void H5MM_sanity_check_all(void);
 H5_DLL void H5MM_final_sanity_check(void);
diff --git a/src/H5Oalloc.c b/src/H5Oalloc.c
index 23dd928..090df18 100644
--- a/src/H5Oalloc.c
+++ b/src/H5Oalloc.c
@@ -949,7 +949,7 @@ H5O__alloc_chunk(H5F_t *f, H5O_t *oh, size_t size, size_t found_null,
      *  # at the beginning of the chunk image.
      */
     if(oh->version > H5O_VERSION_1) {
-        HDmemcpy(p, H5O_CHK_MAGIC, (size_t)H5_SIZEOF_MAGIC);
+        H5MM_memcpy(p, H5O_CHK_MAGIC, (size_t)H5_SIZEOF_MAGIC);
         p += H5_SIZEOF_MAGIC;
     } /* end if */
 
@@ -988,7 +988,7 @@ H5O__alloc_chunk(H5F_t *f, H5O_t *oh, size_t size, size_t found_null,
                         HDassert(curr_msg->type->id != H5O_CONT_ID);
 
                         /* Copy the raw data */
-                        HDmemcpy(p, curr_msg->raw - (size_t)H5O_SIZEOF_MSGHDR_OH(oh),
+                        H5MM_memcpy(p, curr_msg->raw - (size_t)H5O_SIZEOF_MSGHDR_OH(oh),
                             curr_msg->raw_size + (size_t)H5O_SIZEOF_MSGHDR_OH(oh));
 
                         /* Update the message info */
@@ -1044,7 +1044,7 @@ H5O__alloc_chunk(H5F_t *f, H5O_t *oh, size_t size, size_t found_null,
             null_msg->chunkno = oh->mesg[found_msg->msgno].chunkno;
 
             /* Copy the message to move (& its prefix) to its new location */
-            HDmemcpy(p, oh->mesg[found_msg->msgno].raw - H5O_SIZEOF_MSGHDR_OH(oh),
+            H5MM_memcpy(p, oh->mesg[found_msg->msgno].raw - H5O_SIZEOF_MSGHDR_OH(oh),
                      oh->mesg[found_msg->msgno].raw_size + (size_t)H5O_SIZEOF_MSGHDR_OH(oh));
 
             /* Switch moved message to point to new location */
@@ -1519,7 +1519,7 @@ H5O__move_cont(H5F_t *f, H5O_t *oh, unsigned cont_u)
                         move_size = curr_msg->raw_size + (size_t)H5O_SIZEOF_MSGHDR_OH(oh);
 
                         /* Move message out of deleted chunk */
-                        HDmemcpy(move_start, curr_msg->raw - H5O_SIZEOF_MSGHDR_OH(oh), move_size);
+                        H5MM_memcpy(move_start, curr_msg->raw - H5O_SIZEOF_MSGHDR_OH(oh), move_size);
                         curr_msg->raw = move_start + H5O_SIZEOF_MSGHDR_OH(oh);
                         curr_msg->chunkno = cont_chunkno;
                         chk_dirtied = TRUE;
@@ -1791,7 +1791,7 @@ H5O__move_msgs_forward(H5F_t *f, H5O_t *oh)
                         } /* end if */
 
                         /* Copy raw data for non-null message to new chunk */
-                        HDmemcpy(null_msg->raw - H5O_SIZEOF_MSGHDR_OH(oh), curr_msg->raw - H5O_SIZEOF_MSGHDR_OH(oh), curr_msg->raw_size + (size_t)H5O_SIZEOF_MSGHDR_OH(oh));
+                        H5MM_memcpy(null_msg->raw - H5O_SIZEOF_MSGHDR_OH(oh), curr_msg->raw - H5O_SIZEOF_MSGHDR_OH(oh), curr_msg->raw_size + (size_t)H5O_SIZEOF_MSGHDR_OH(oh));
 
                         /* Point non-null message at null message's space */
                         curr_msg->chunkno = null_msg->chunkno;
diff --git a/src/H5Oattr.c b/src/H5Oattr.c
index c420046..0a7c4bf 100644
--- a/src/H5Oattr.c
+++ b/src/H5Oattr.c
@@ -208,7 +208,7 @@ H5O_attr_decode(H5F_t *f, H5O_t *open_oh, unsigned H5_ATTR_UNUSED mesg_flags,
         HGOTO_ERROR(H5E_ATTR, H5E_CANTDECODE, NULL, "can't decode attribute dataspace")
 
     /* Copy the extent information to the dataspace */
-    HDmemcpy(&(attr->shared->ds->extent), extent, sizeof(H5S_extent_t));
+    H5MM_memcpy(&(attr->shared->ds->extent), extent, sizeof(H5S_extent_t));
 
     /* Release temporary extent information */
     extent = H5FL_FREE(H5S_extent_t, extent);
@@ -240,7 +240,7 @@ H5O_attr_decode(H5F_t *f, H5O_t *open_oh, unsigned H5_ATTR_UNUSED mesg_flags,
     if(attr->shared->data_size) {
         if(NULL == (attr->shared->data = H5FL_BLK_MALLOC(attr_buf, attr->shared->data_size)))
             HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
-        HDmemcpy(attr->shared->data, p, attr->shared->data_size);
+        H5MM_memcpy(attr->shared->data, p, attr->shared->data_size);
     } /* end if */
 
     /* Increment the reference count for this object header message in cache(compact
@@ -336,7 +336,7 @@ H5O_attr_encode(H5F_t *f, uint8_t *p, const void *mesg)
         *p++ = attr->shared->encoding;
 
     /* Write the name including null terminator */
-    HDmemcpy(p, attr->shared->name, name_len);
+    H5MM_memcpy(p, attr->shared->name, name_len);
     if(attr->shared->version < H5O_ATTR_VERSION_2) {
         /* Pad to the correct number of bytes */
         HDmemset(p + name_len, 0, H5O_ALIGN_OLD(name_len) - name_len);
@@ -369,7 +369,7 @@ H5O_attr_encode(H5F_t *f, uint8_t *p, const void *mesg)
 
     /* Store attribute data.  If there's no data, store 0 as fill value. */
     if(attr->shared->data)
-        HDmemcpy(p, attr->shared->data, attr->shared->data_size);
+        H5MM_memcpy(p, attr->shared->data, attr->shared->data_size);
     else
         HDmemset(p, 0, attr->shared->data_size);
 
diff --git a/src/H5Oattribute.c b/src/H5Oattribute.c
index 6e135c5..57ec9b8 100644
--- a/src/H5Oattribute.c
+++ b/src/H5Oattribute.c
@@ -862,7 +862,7 @@ H5O__attr_write_cb(H5O_t *oh, H5O_mesg_t *mesg/*in,out*/,
 
             /* (Needs to occur before updating the shared message, or the hash
              *      value on the old & new messages will be the same) */
-            HDmemcpy(((H5A_t *)mesg->native)->shared->data, udata->attr->shared->data, udata->attr->shared->data_size);
+            H5MM_memcpy(((H5A_t *)mesg->native)->shared->data, udata->attr->shared->data, udata->attr->shared->data_size);
         } /* end if */
 
         /* Mark the message as modified */
diff --git a/src/H5Ocache.c b/src/H5Ocache.c
index 578cff0..213dd11 100644
--- a/src/H5Ocache.c
+++ b/src/H5Ocache.c
@@ -542,7 +542,7 @@ H5O__cache_serialize(const H5F_t *f, void *image, size_t len, void *_thing)
      * Can we rework things so that the object header and the cache 
      * share a buffer?
      */
-    HDmemcpy(image, oh->chunk[0].image, len);
+    H5MM_memcpy(image, oh->chunk[0].image, len);
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -900,7 +900,7 @@ H5O__cache_chk_serialize(const H5F_t *f, void *image, size_t len, void *_thing)
     /* copy the chunk into the image -- this is potentially expensive.
      * Can we rework things so that the chunk and the cache share a buffer?
      */
-    HDmemcpy(image, chk_proxy->oh->chunk[chk_proxy->chunkno].image, len);
+    H5MM_memcpy(image, chk_proxy->oh->chunk[chk_proxy->chunkno].image, len);
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1352,7 +1352,7 @@ H5O__chunk_deserialize(H5O_t *oh, haddr_t addr, size_t len, const uint8_t *image
     oh->chunk[chunkno].chunk_proxy = NULL;
 
     /* Copy disk image into chunk's image */
-    HDmemcpy(oh->chunk[chunkno].image, image, oh->chunk[chunkno].size);
+    H5MM_memcpy(oh->chunk[chunkno].image, image, oh->chunk[chunkno].size);
 
     /* Point into chunk image to decode */
     chunk_image = oh->chunk[chunkno].image;
diff --git a/src/H5Ocopy.c b/src/H5Ocopy.c
index a3d4884..9578f95 100644
--- a/src/H5Ocopy.c
+++ b/src/H5Ocopy.c
@@ -732,7 +732,7 @@ H5O__copy_header_real(const H5O_loc_t *oloc_src, H5O_loc_t *oloc_dst /*out*/,
      * header.  This will be written when the header is flushed to disk.
      */
     if(oh_dst->version > H5O_VERSION_1)
-        HDmemcpy(current_pos, H5O_HDR_MAGIC, (size_t)H5_SIZEOF_MAGIC);
+        H5MM_memcpy(current_pos, H5O_HDR_MAGIC, (size_t)H5_SIZEOF_MAGIC);
     current_pos += H5O_SIZEOF_HDR(oh_dst) - H5O_SIZEOF_CHKSUM_OH(oh_dst);
 
     /* Loop through destination messages, updating their "raw" info */
@@ -755,7 +755,7 @@ H5O__copy_header_real(const H5O_loc_t *oloc_src, H5O_loc_t *oloc_dst /*out*/,
         /* Copy each message that wasn't dirtied above */
         if(!mesg_dst->dirty)
             /* Copy the message header plus the message's raw data. */
-            HDmemcpy(current_pos, mesg_src->raw - msghdr_size, msghdr_size + mesg_src->raw_size);
+            H5MM_memcpy(current_pos, mesg_src->raw - msghdr_size, msghdr_size + mesg_src->raw_size);
 
         /* Set message's raw pointer to destination chunk's new "image" */
         mesg_dst->raw = current_pos + msghdr_size;
diff --git a/src/H5Odrvinfo.c b/src/H5Odrvinfo.c
index 159c950..eb678e4 100644
--- a/src/H5Odrvinfo.c
+++ b/src/H5Odrvinfo.c
@@ -101,7 +101,7 @@ H5O_drvinfo_decode(H5F_t H5_ATTR_UNUSED *f, H5O_t H5_ATTR_UNUSED *open_oh,
 	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed for driver info message")
 
     /* Retrieve driver name */
-    HDmemcpy(mesg->name, p, 8);
+    H5MM_memcpy(mesg->name, p, 8);
     mesg->name[8] = '\0';
     p += 8;
 
@@ -116,7 +116,7 @@ H5O_drvinfo_decode(H5F_t H5_ATTR_UNUSED *f, H5O_t H5_ATTR_UNUSED *open_oh,
     } /* end if */
 
     /* Copy encoded driver info into buffer */
-    HDmemcpy(mesg->buf, p, mesg->len);
+    H5MM_memcpy(mesg->buf, p, mesg->len);
 
     /* Set return value */
     ret_value = (void *)mesg;
@@ -152,11 +152,11 @@ H5O_drvinfo_encode(H5F_t H5_ATTR_UNUSED *f, hbool_t H5_ATTR_UNUSED disable_share
 
     /* Store version, driver name, buffer length, & encoded buffer */
     *p++ = H5O_DRVINFO_VERSION;
-    HDmemcpy(p, mesg->name, 8);
+    H5MM_memcpy(p, mesg->name, 8);
     p += 8;
     HDassert(mesg->len <= 65535);
     UINT16ENCODE(p, mesg->len);
-    HDmemcpy(p, mesg->buf, mesg->len);
+    H5MM_memcpy(p, mesg->buf, mesg->len);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5O_drvinfo_encode() */
@@ -200,7 +200,7 @@ H5O_drvinfo_copy(const void *_mesg, void *_dest)
             dest = (H5O_drvinfo_t *)H5MM_xfree(dest);
 	HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
     } /* end if */
-    HDmemcpy(dest->buf, mesg->buf, mesg->len);
+    H5MM_memcpy(dest->buf, mesg->buf, mesg->len);
 
     /* Set return value */
     ret_value = dest;
diff --git a/src/H5Odtype.c b/src/H5Odtype.c
index 28970d1..39d8bac 100644
--- a/src/H5Odtype.c
+++ b/src/H5Odtype.c
@@ -250,7 +250,7 @@ H5O_dtype_decode_helper(H5F_t *f, unsigned *ioflags/*in,out*/, const uint8_t **p
             HDassert(0 == (z & 0x7)); /*must be aligned*/
             if(NULL == (dt->shared->u.opaque.tag = (char *)H5MM_malloc(z + 1)))
                 HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
-            HDmemcpy(dt->shared->u.opaque.tag, *pp, z);
+            H5MM_memcpy(dt->shared->u.opaque.tag, *pp, z);
             dt->shared->u.opaque.tag[z] = '\0';
             *pp += z;
             break;
@@ -483,7 +483,7 @@ H5O_dtype_decode_helper(H5F_t *f, unsigned *ioflags/*in,out*/, const uint8_t **p
             } /* end for */
 
             /* Values */
-            HDmemcpy(dt->shared->u.enumer.value, *pp,
+            H5MM_memcpy(dt->shared->u.enumer.value, *pp,
                      dt->shared->u.enumer.nmembs * dt->shared->parent->shared->size);
             *pp += dt->shared->u.enumer.nmembs * dt->shared->parent->shared->size;
             break;
@@ -882,7 +882,7 @@ H5O_dtype_encode_helper(const H5F_t *f, uint8_t **pp, const H5T_t *dt)
                 z = HDstrlen(dt->shared->u.opaque.tag);
                 aligned = (z + 7) & (H5T_OPAQUE_TAG_MAX - 8);
                 flags = (unsigned)(flags | aligned);
-                HDmemcpy(*pp, dt->shared->u.opaque.tag, MIN(z,aligned));
+                H5MM_memcpy(*pp, dt->shared->u.opaque.tag, MIN(z,aligned));
                 for(n = MIN(z, aligned); n < aligned; n++)
                     (*pp)[n] = 0;
                 *pp += aligned;
@@ -997,7 +997,7 @@ H5O_dtype_encode_helper(const H5F_t *f, uint8_t **pp, const H5T_t *dt)
             } /* end for */
 
             /* Values */
-            HDmemcpy(*pp, dt->shared->u.enumer.value, dt->shared->u.enumer.nmembs * dt->shared->parent->shared->size);
+            H5MM_memcpy(*pp, dt->shared->u.enumer.value, dt->shared->u.enumer.nmembs * dt->shared->parent->shared->size);
             *pp += dt->shared->u.enumer.nmembs * dt->shared->parent->shared->size;
             break;
 
diff --git a/src/H5Oefl.c b/src/H5Oefl.c
index 6a81a46..b18d819 100644
--- a/src/H5Oefl.c
+++ b/src/H5Oefl.c
@@ -461,7 +461,7 @@ H5O__efl_copy_file(H5F_t H5_ATTR_UNUSED *file_src, void *mesg_src, H5F_t *file_d
         HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
 
     /* Copy the "top level" information */
-    HDmemcpy(efl_dst, efl_src, sizeof(H5O_efl_t));
+    H5MM_memcpy(efl_dst, efl_src, sizeof(H5O_efl_t));
 
     /* Determine size needed for destination heap */
     heap_size = H5HL_ALIGN(1);  /* "empty" name */
@@ -488,7 +488,7 @@ H5O__efl_copy_file(H5F_t H5_ATTR_UNUSED *file_src, void *mesg_src, H5F_t *file_d
             HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
 
         /* copy content from the source. Need to update later */
-        HDmemcpy(efl_dst->slot, efl_src->slot, size);
+        H5MM_memcpy(efl_dst->slot, efl_src->slot, size);
     } /* end if */
 
     /* copy the name from the source */
diff --git a/src/H5Ofill.c b/src/H5Ofill.c
index fd50cb9..ebd885c 100644
--- a/src/H5Ofill.c
+++ b/src/H5Ofill.c
@@ -232,7 +232,7 @@ H5O_fill_new_decode(H5F_t H5_ATTR_UNUSED *f, H5O_t H5_ATTR_UNUSED *open_oh,
                     HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "destination buffer too small")
                 if(NULL == (fill->buf = H5MM_malloc((size_t)fill->size)))
                     HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed for fill value")
-                HDmemcpy(fill->buf, p, (size_t)fill->size);
+                H5MM_memcpy(fill->buf, p, (size_t)fill->size);
             } /* end if */
         } /* end if */
         else
@@ -270,7 +270,7 @@ H5O_fill_new_decode(H5F_t H5_ATTR_UNUSED *f, H5O_t H5_ATTR_UNUSED *open_oh,
             H5_CHECK_OVERFLOW(fill->size, ssize_t, size_t);
             if(NULL == (fill->buf = H5MM_malloc((size_t)fill->size)))
                 HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed for fill value")
-            HDmemcpy(fill->buf, p, (size_t)fill->size);
+            H5MM_memcpy(fill->buf, p, (size_t)fill->size);
 
             /* Set the "defined" flag */
             fill->fill_defined = TRUE;
@@ -353,7 +353,7 @@ H5O_fill_old_decode(H5F_t *f, H5O_t *open_oh,
 
         if(NULL == (fill->buf = H5MM_malloc((size_t)fill->size)))
             HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed for fill value")
-        HDmemcpy(fill->buf, p, (size_t)fill->size);
+        H5MM_memcpy(fill->buf, p, (size_t)fill->size);
         fill->fill_defined = TRUE;
     } /* end if */
     else
@@ -420,7 +420,7 @@ H5O_fill_new_encode(H5F_t H5_ATTR_UNUSED *f, uint8_t *p, const void *_fill)
             if(fill->size > 0)
                 if(fill->buf) {
                     H5_CHECK_OVERFLOW(fill->size, ssize_t, size_t);
-                    HDmemcpy(p, fill->buf, (size_t)fill->size);
+                    H5MM_memcpy(p, fill->buf, (size_t)fill->size);
                 } /* end if */
         } /* end if */
     } /* end if */
@@ -459,7 +459,7 @@ H5O_fill_new_encode(H5F_t H5_ATTR_UNUSED *f, uint8_t *p, const void *_fill)
             /* Encode the fill value */
             HDassert(fill->buf);
             H5_CHECK_OVERFLOW(fill->size, ssize_t, size_t);
-            HDmemcpy(p, fill->buf, (size_t)fill->size);
+            H5MM_memcpy(p, fill->buf, (size_t)fill->size);
         } /* end if */
         else {
             /* Flags */
@@ -499,7 +499,7 @@ H5O_fill_old_encode(H5F_t H5_ATTR_UNUSED *f, uint8_t *p, const void *_fill)
 
     UINT32ENCODE(p, fill->size);
     if(fill->buf)
-        HDmemcpy(p, fill->buf, (size_t)fill->size);
+        H5MM_memcpy(p, fill->buf, (size_t)fill->size);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5O_fill_old_encode() */
@@ -551,7 +551,7 @@ H5O_fill_copy(const void *_src, void *_dst)
         H5_CHECK_OVERFLOW(src->size, ssize_t, size_t);
         if(NULL == (dst->buf = H5MM_malloc((size_t)src->size)))
             HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed for fill value")
-        HDmemcpy(dst->buf, src->buf, (size_t)src->size);
+        H5MM_memcpy(dst->buf, src->buf, (size_t)src->size);
 
         /* Check for needing to convert/copy fill value */
         if(src->type) {
@@ -1025,7 +1025,7 @@ H5O_fill_convert(H5O_fill_t *fill, H5T_t *dset_type, hbool_t *fill_changed)
         else {
             if(NULL == (buf = H5MM_malloc(H5T_get_size(dset_type))))
                 HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for type conversion")
-            HDmemcpy(buf, fill->buf, H5T_get_size(fill->type));
+            H5MM_memcpy(buf, fill->buf, H5T_get_size(fill->type));
         } /* end else */
 
         /* Use CALLOC here to clear the buffer in case later the library thinks there's
diff --git a/src/H5Oint.c b/src/H5Oint.c
index d3a409c..8a10d04 100644
--- a/src/H5Oint.c
+++ b/src/H5Oint.c
@@ -496,7 +496,7 @@ H5O__apply_ohdr(H5F_t *f, H5O_t *oh, hid_t ocpl_id, size_t size_hint, size_t ini
 
     /* Put magic # for object header in first chunk */
     if(H5O_VERSION_1 < oh->version)
-        HDmemcpy(oh->chunk[0].image, H5O_HDR_MAGIC, (size_t)H5_SIZEOF_MAGIC);
+        H5MM_memcpy(oh->chunk[0].image, H5O_HDR_MAGIC, (size_t)H5_SIZEOF_MAGIC);
 
     /* Create the message list */
     oh->nmesgs = 1;
@@ -1921,7 +1921,7 @@ H5O_loc_copy(H5O_loc_t *dst, H5O_loc_t *src, H5_copy_depth_t depth)
     HDassert(depth == H5_COPY_SHALLOW || depth == H5_COPY_DEEP);
 
     /* Copy the top level information */
-    HDmemcpy(dst, src, sizeof(H5O_loc_t));
+    H5MM_memcpy(dst, src, sizeof(H5O_loc_t));
 
     /* Deep copy the names */
     if(depth == H5_COPY_DEEP) {
diff --git a/src/H5Olayout.c b/src/H5Olayout.c
index 86f4c46..138f219 100644
--- a/src/H5Olayout.c
+++ b/src/H5Olayout.c
@@ -189,7 +189,7 @@ H5O__layout_decode(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh,
             if(mesg->storage.u.compact.size > 0) {
                 if(NULL == (mesg->storage.u.compact.buf = H5MM_malloc(mesg->storage.u.compact.size)))
                     HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed for compact data buffer")
-                HDmemcpy(mesg->storage.u.compact.buf, p, mesg->storage.u.compact.size);
+                H5MM_memcpy(mesg->storage.u.compact.buf, p, mesg->storage.u.compact.size);
                 p += mesg->storage.u.compact.size;
             } /* end if */
         } /* end if */
@@ -210,7 +210,7 @@ H5O__layout_decode(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh,
                         HGOTO_ERROR(H5E_OHDR, H5E_CANTALLOC, NULL, "memory allocation failed for compact data buffer")
 
                     /* Compact data */
-                    HDmemcpy(mesg->storage.u.compact.buf, p, mesg->storage.u.compact.size);
+                    H5MM_memcpy(mesg->storage.u.compact.buf, p, mesg->storage.u.compact.size);
                     p += mesg->storage.u.compact.size;
                 } /* end if */
 
@@ -425,14 +425,14 @@ H5O__layout_decode(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh,
                         tmp_size = HDstrlen((const char *)heap_block_p) + 1;
                         if(NULL == (mesg->storage.u.virt.list[i].source_file_name = (char *)H5MM_malloc(tmp_size)))
                             HGOTO_ERROR(H5E_OHDR, H5E_RESOURCE, NULL, "unable to allocate memory for source file name")
-                        (void)HDmemcpy(mesg->storage.u.virt.list[i].source_file_name, heap_block_p, tmp_size);
+                        (void)H5MM_memcpy(mesg->storage.u.virt.list[i].source_file_name, heap_block_p, tmp_size);
                         heap_block_p += tmp_size;
 
                         /* Source dataset name */
                         tmp_size = HDstrlen((const char *)heap_block_p) + 1;
                         if(NULL == (mesg->storage.u.virt.list[i].source_dset_name = (char *)H5MM_malloc(tmp_size)))
                             HGOTO_ERROR(H5E_OHDR, H5E_RESOURCE, NULL, "unable to allocate memory for source dataset name")
-                        (void)HDmemcpy(mesg->storage.u.virt.list[i].source_dset_name, heap_block_p, tmp_size);
+                        (void)H5MM_memcpy(mesg->storage.u.virt.list[i].source_dset_name, heap_block_p, tmp_size);
                         heap_block_p += tmp_size;
 
                         /* Source selection */
@@ -581,7 +581,7 @@ H5O__layout_encode(H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, uint8_t *p,
             /* Raw data */
             if(mesg->storage.u.compact.size > 0) {
                 if(mesg->storage.u.compact.buf)
-                    HDmemcpy(p, mesg->storage.u.compact.buf, mesg->storage.u.compact.size);
+                    H5MM_memcpy(p, mesg->storage.u.compact.buf, mesg->storage.u.compact.size);
                 else
                     HDmemset(p, 0, mesg->storage.u.compact.size);
                 p += mesg->storage.u.compact.size;
@@ -742,7 +742,7 @@ H5O__layout_copy(const void *_mesg, void *_dest)
                     HGOTO_ERROR(H5E_OHDR, H5E_NOSPACE, NULL, "unable to allocate memory for compact dataset")
 
                 /* Copy over the raw data */
-                HDmemcpy(dest->storage.u.compact.buf, mesg->storage.u.compact.buf, dest->storage.u.compact.size);
+                H5MM_memcpy(dest->storage.u.compact.buf, mesg->storage.u.compact.buf, dest->storage.u.compact.size);
             } /* end if */
             else
                 HDassert(dest->storage.u.compact.buf == NULL);
diff --git a/src/H5Olink.c b/src/H5Olink.c
index 55e1aee..4bd952b 100644
--- a/src/H5Olink.c
+++ b/src/H5Olink.c
@@ -202,7 +202,7 @@ H5O__link_decode(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh,
     /* Get the link's name */
     if(NULL == (lnk->name = (char *)H5MM_malloc(len + 1)))
         HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
-    HDmemcpy(lnk->name, p, len);
+    H5MM_memcpy(lnk->name, p, len);
     lnk->name[len] = '\0';
     p += len;
 
@@ -220,7 +220,7 @@ H5O__link_decode(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh,
                 HGOTO_ERROR(H5E_OHDR, H5E_CANTLOAD, NULL, "invalid link length")
             if(NULL == (lnk->u.soft.name = (char *)H5MM_malloc((size_t)len + 1)))
                 HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
-            HDmemcpy(lnk->u.soft.name, p, len);
+            H5MM_memcpy(lnk->u.soft.name, p, len);
             lnk->u.soft.name[len] = '\0';
             p += len;
             break;
@@ -240,7 +240,7 @@ H5O__link_decode(H5F_t *f, H5O_t H5_ATTR_UNUSED *open_oh,
             {
                 if(NULL == (lnk->u.ud.udata = H5MM_malloc((size_t)len)))
                     HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
-                HDmemcpy(lnk->u.ud.udata, p, len);
+                H5MM_memcpy(lnk->u.ud.udata, p, len);
                 p += len;
             }
             else
@@ -349,7 +349,7 @@ H5O_link_encode(H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, uint8_t *p, con
     } /* end switch */
 
     /* Store the link's name */
-    HDmemcpy(p, lnk->name, (size_t)len);
+    H5MM_memcpy(p, lnk->name, (size_t)len);
     p += len;
 
     /* Store the appropriate information for each type of link */
@@ -364,7 +364,7 @@ H5O_link_encode(H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, uint8_t *p, con
             len = (uint16_t)HDstrlen(lnk->u.soft.name);
             HDassert(len > 0);
             UINT16ENCODE(p, len)
-            HDmemcpy(p, lnk->u.soft.name, (size_t)len);
+            H5MM_memcpy(p, lnk->u.soft.name, (size_t)len);
             p += len;
             break;
 
@@ -380,7 +380,7 @@ H5O_link_encode(H5F_t *f, hbool_t H5_ATTR_UNUSED disable_shared, uint8_t *p, con
             UINT16ENCODE(p, len)
             if(len > 0)
             {
-                HDmemcpy(p, lnk->u.ud.udata, (size_t)len);
+                H5MM_memcpy(p, lnk->u.ud.udata, (size_t)len);
                 p+=len;
             }
             break;
@@ -437,7 +437,7 @@ H5O_link_copy(const void *_mesg, void *_dest)
         if(lnk->u.ud.size > 0) {
             if(NULL == (dest->u.ud.udata = H5MM_malloc(lnk->u.ud.size)))
                 HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
-            HDmemcpy(dest->u.ud.udata, lnk->u.ud.udata, lnk->u.ud.size);
+            H5MM_memcpy(dest->u.ud.udata, lnk->u.ud.udata, lnk->u.ud.size);
         } /* end if */
     } /* end if */
 
diff --git a/src/H5Opline.c b/src/H5Opline.c
index 1fae1b8..85a95b7 100644
--- a/src/H5Opline.c
+++ b/src/H5Opline.c
@@ -318,7 +318,7 @@ H5O_pline_encode(H5F_t H5_ATTR_UNUSED *f, uint8_t *p/*out*/, const void *mesg)
         /* Encode name, if there is one to encode */
 	if(name_length > 0) {
             /* Store name, with null terminator */
-	    HDmemcpy(p, name, name_length);
+	    H5MM_memcpy(p, name, name_length);
 	    p += name_length;
 
             /* Pad out name to alignment, in older versions */
@@ -409,7 +409,7 @@ H5O_pline_copy(const void *_src, void *_dst/*out*/)
                     if(NULL == (dst->filter[i].cd_values = (unsigned *)H5MM_malloc(src->filter[i].cd_nelmts* sizeof(unsigned))))
                         HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
 
-                    HDmemcpy(dst->filter[i].cd_values, src->filter[i].cd_values,
+                    H5MM_memcpy(dst->filter[i].cd_values, src->filter[i].cd_values,
                             src->filter[i].cd_nelmts * sizeof(unsigned));
                 } /* end if */
                 else
diff --git a/src/H5Oshared.c b/src/H5Oshared.c
index 4fc0488..eec1a84 100644
--- a/src/H5Oshared.c
+++ b/src/H5Oshared.c
@@ -358,7 +358,7 @@ H5O__shared_decode(H5F_t *f, H5O_t *open_oh, unsigned *ioflags, const uint8_t *b
          */
         if(sh_mesg.type == H5O_SHARE_TYPE_SOHM) {
             HDassert(version >= H5O_SHARED_VERSION_3);
-            HDmemcpy(&sh_mesg.u.heap_id, buf, sizeof(sh_mesg.u.heap_id));
+            H5MM_memcpy(&sh_mesg.u.heap_id, buf, sizeof(sh_mesg.u.heap_id));
         } /* end if */
         else {
             /* The H5O_COMMITTED_FLAG should be set if this message
@@ -426,7 +426,7 @@ H5O__shared_encode(const H5F_t *f, uint8_t *buf/*out*/, const H5O_shared_t *sh_m
      * object header that holds it.
      */
     if(sh_mesg->type == H5O_SHARE_TYPE_SOHM)
-        HDmemcpy(buf, &(sh_mesg->u.heap_id), sizeof(sh_mesg->u.heap_id));
+        H5MM_memcpy(buf, &(sh_mesg->u.heap_id), sizeof(sh_mesg->u.heap_id));
     else
         H5F_addr_encode(f, &buf, sh_mesg->u.loc.oh_addr);
 
diff --git a/src/H5PB.c b/src/H5PB.c
index 88a6151..b4a39a7 100644
--- a/src/H5PB.c
+++ b/src/H5PB.c
@@ -609,7 +609,7 @@ H5PB_update_entry(H5PB_t *page_buf, haddr_t addr, size_t size, const void *buf)
 
         HDassert(addr + size <= page_addr + page_buf->page_size);
         offset = addr - page_addr;
-        HDmemcpy((uint8_t *)page_entry->page_buf_ptr + offset, buf, size);
+        H5MM_memcpy((uint8_t *)page_entry->page_buf_ptr + offset, buf, size);
 
         /* move to top of LRU list */
         H5PB__MOVE_TO_TOP_LRU(page_buf, page_entry)
@@ -818,7 +818,7 @@ H5PB_read(H5F_t *f, H5FD_mem_t type, haddr_t addr, size_t size, void *buf/*out*/
                         offset = addr - first_page_addr;
                         HDassert(page_buf->page_size > offset);
 
-                        HDmemcpy(buf, (uint8_t *)page_entry->page_buf_ptr + offset, 
+                        H5MM_memcpy(buf, (uint8_t *)page_entry->page_buf_ptr + offset, 
                                  page_buf->page_size - (size_t)offset);
 
                         /* move to top of LRU list */
@@ -829,7 +829,7 @@ H5PB_read(H5F_t *f, H5FD_mem_t type, haddr_t addr, size_t size, void *buf/*out*/
                         offset = (num_touched_pages-2)*page_buf->page_size + 
                             (page_buf->page_size - (addr - first_page_addr));
 
-                        HDmemcpy((uint8_t *)buf + offset, page_entry->page_buf_ptr,
+                        H5MM_memcpy((uint8_t *)buf + offset, page_entry->page_buf_ptr,
                                  (size_t)((addr + size) - last_page_addr));
 
                         /* move to top of LRU list */
@@ -839,7 +839,7 @@ H5PB_read(H5F_t *f, H5FD_mem_t type, haddr_t addr, size_t size, void *buf/*out*/
                     else {
                         offset = i*page_buf->page_size;
 
-                        HDmemcpy((uint8_t *)buf+(i*page_buf->page_size) , page_entry->page_buf_ptr, 
+                        H5MM_memcpy((uint8_t *)buf+(i*page_buf->page_size) , page_entry->page_buf_ptr, 
                              page_buf->page_size);
                     } /* end else */
                 } /* end if */
@@ -872,7 +872,7 @@ H5PB_read(H5F_t *f, H5FD_mem_t type, haddr_t addr, size_t size, void *buf/*out*/
                 buf_offset = (0 == i ? 0 : size - access_size);
 
                 /* copy the requested data from the page into the input buffer */
-                HDmemcpy((uint8_t *)buf + buf_offset, (uint8_t *)page_entry->page_buf_ptr + offset, access_size);
+                H5MM_memcpy((uint8_t *)buf + buf_offset, (uint8_t *)page_entry->page_buf_ptr + offset, access_size);
 
                 /* Update LRU */
                 H5PB__MOVE_TO_TOP_LRU(page_buf, page_entry)
@@ -937,7 +937,7 @@ H5PB_read(H5F_t *f, H5FD_mem_t type, haddr_t addr, size_t size, void *buf/*out*/
                 /* Copy the requested data from the page into the input buffer */
                 offset = (0 == i ? addr - search_addr : 0);
                 buf_offset = (0 == i ? 0 : size - access_size);
-                HDmemcpy((uint8_t *)buf + buf_offset, (uint8_t *)new_page_buf + offset, access_size);
+                H5MM_memcpy((uint8_t *)buf + buf_offset, (uint8_t *)new_page_buf + offset, access_size);
 
                 /* Create the new PB entry */
                 if(NULL == (page_entry = H5FL_CALLOC(H5PB_entry_t)))
@@ -1102,7 +1102,7 @@ H5PB_write(H5F_t *f, H5FD_mem_t type, haddr_t addr,
                     HDassert(page_buf->page_size > offset);
 
                     /* Update page's data */
-                    HDmemcpy((uint8_t *)page_entry->page_buf_ptr + offset, buf, page_buf->page_size - (size_t)offset);
+                    H5MM_memcpy((uint8_t *)page_entry->page_buf_ptr + offset, buf, page_buf->page_size - (size_t)offset);
 
                     /* Mark page dirty and push to top of LRU */
                     page_entry->is_dirty = TRUE;
@@ -1121,7 +1121,7 @@ H5PB_write(H5F_t *f, H5FD_mem_t type, haddr_t addr,
                         (page_buf->page_size - (addr - first_page_addr));
 
                     /* Update page's data */
-                    HDmemcpy(page_entry->page_buf_ptr, (const uint8_t *)buf + offset, 
+                    H5MM_memcpy(page_entry->page_buf_ptr, (const uint8_t *)buf + offset, 
                              (size_t)((addr + size) - last_page_addr));
 
                     /* Mark page dirty and push to top of LRU */
@@ -1173,7 +1173,7 @@ H5PB_write(H5F_t *f, H5FD_mem_t type, haddr_t addr,
                 buf_offset = (0 == i ? 0 : size - access_size);
 
                 /* Copy the requested data from the input buffer into the page */
-                HDmemcpy((uint8_t *)page_entry->page_buf_ptr + offset, (const uint8_t *)buf + buf_offset, access_size);
+                H5MM_memcpy((uint8_t *)page_entry->page_buf_ptr + offset, (const uint8_t *)buf + buf_offset, access_size);
 
                 /* Mark page dirty and push to top of LRU */
                 page_entry->is_dirty = TRUE;
@@ -1289,7 +1289,7 @@ H5PB_write(H5F_t *f, H5FD_mem_t type, haddr_t addr,
                 } /* end else */
 
                 /* Copy the requested data from the page into the input buffer */
-                HDmemcpy((uint8_t *)new_page_buf + offset, (const uint8_t *)buf+buf_offset, access_size);
+                H5MM_memcpy((uint8_t *)new_page_buf + offset, (const uint8_t *)buf+buf_offset, access_size);
 
                 /* Page is dirty now */
                 page_entry->is_dirty = TRUE;
diff --git a/src/H5Pdapl.c b/src/H5Pdapl.c
index 00e598f..9279615 100644
--- a/src/H5Pdapl.c
+++ b/src/H5Pdapl.c
@@ -341,7 +341,7 @@ H5P__dapl_vds_file_pref_enc(const void *value, void **_pp, size_t *size)
 
         /* encode the prefix */
         if(NULL != vds_file_pref) {
-            HDmemcpy(*(char **)pp, vds_file_pref, len);
+            H5MM_memcpy(*(char **)pp, vds_file_pref, len);
             *pp += len;
         } /* end if */
     } /* end if */
@@ -589,7 +589,7 @@ H5P__dapl_efile_pref_enc(const void *value, void **_pp, size_t *size)
 
         /* encode the prefix */
         if(NULL != efile_pref) {
-            HDmemcpy(*(char **)pp, efile_pref, len);
+            H5MM_memcpy(*(char **)pp, efile_pref, len);
             *pp += len;
         } /* end if */
     } /* end if */
diff --git a/src/H5Pdcpl.c b/src/H5Pdcpl.c
index b85f105..41d7c78 100644
--- a/src/H5Pdcpl.c
+++ b/src/H5Pdcpl.c
@@ -439,13 +439,13 @@ H5P__dcrt_layout_enc(const void *value, void **_pp, size_t *size)
             for(u = 0; u < layout->storage.u.virt.list_nused; u++) {
                 /* Source file name */
                 tmp_size = HDstrlen(layout->storage.u.virt.list[u].source_file_name) + (size_t)1;
-                (void)HDmemcpy(*pp, layout->storage.u.virt.list[u].source_file_name, tmp_size);
+                (void)H5MM_memcpy(*pp, layout->storage.u.virt.list[u].source_file_name, tmp_size);
                 *pp += tmp_size;
                 *size += tmp_size;
 
                 /* Source dataset name */
                 tmp_size = HDstrlen(layout->storage.u.virt.list[u].source_dset_name) + (size_t)1;
-                (void)HDmemcpy(*pp, layout->storage.u.virt.list[u].source_dset_name, tmp_size);
+                (void)H5MM_memcpy(*pp, layout->storage.u.virt.list[u].source_dset_name, tmp_size);
                 *pp += tmp_size;
                 *size += tmp_size;
 
@@ -615,14 +615,14 @@ H5P__dcrt_layout_dec(const void **_pp, void *value)
                         tmp_size = HDstrlen((const char *)*pp) + 1;
                         if(NULL == (tmp_layout.storage.u.virt.list[u].source_file_name = (char *)H5MM_malloc(tmp_size)))
                             HGOTO_ERROR(H5E_PLIST, H5E_CANTALLOC, FAIL, "unable to allocate memory for source file name")
-                        (void)HDmemcpy(tmp_layout.storage.u.virt.list[u].source_file_name, *pp, tmp_size);
+                        (void)H5MM_memcpy(tmp_layout.storage.u.virt.list[u].source_file_name, *pp, tmp_size);
                         *pp += tmp_size;
 
                         /* Source dataset name */
                         tmp_size = HDstrlen((const char *)*pp) + 1;
                         if(NULL == (tmp_layout.storage.u.virt.list[u].source_dset_name = (char *)H5MM_malloc(tmp_size)))
                             HGOTO_ERROR(H5E_PLIST, H5E_CANTALLOC, FAIL, "unable to allocate memory for source dataset name")
-                        (void)HDmemcpy(tmp_layout.storage.u.virt.list[u].source_dset_name, *pp, tmp_size);
+                        (void)H5MM_memcpy(tmp_layout.storage.u.virt.list[u].source_dset_name, *pp, tmp_size);
                         *pp += tmp_size;
 
                         /* Source selection */
@@ -687,7 +687,7 @@ H5P__dcrt_layout_dec(const void **_pp, void *value)
     } /* end switch */
 
     /* Set the value */
-    HDmemcpy(value, layout, sizeof(H5O_layout_t));
+    H5MM_memcpy(value, layout, sizeof(H5O_layout_t));
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1036,7 +1036,7 @@ H5P__dcrt_fill_value_enc(const void *value, void **_pp, size_t *size)
         /* Encode the fill value & datatype */
         if(fill->size > 0) {
             /* Encode the fill value itself */
-            HDmemcpy(*pp, (uint8_t *)fill->buf, (size_t)fill->size);
+            H5MM_memcpy(*pp, (uint8_t *)fill->buf, (size_t)fill->size);
             *pp += fill->size;
 
             /* Encode fill value datatype */
@@ -1133,7 +1133,7 @@ H5P__dcrt_fill_value_dec(const void **_pp, void *_value)
         /* Allocate fill buffer and copy the contents in it */
         if(NULL == (fill->buf = H5MM_malloc((size_t)fill->size)))
             HGOTO_ERROR(H5E_PLIST, H5E_CANTALLOC, FAIL, "memory allocation failed for fill value buffer")
-        HDmemcpy((uint8_t *)fill->buf, *pp, (size_t)fill->size);
+        H5MM_memcpy((uint8_t *)fill->buf, *pp, (size_t)fill->size);
         *pp += fill->size;
 
         enc_size = *(*pp)++;
@@ -1448,7 +1448,7 @@ H5P__dcrt_ext_file_list_enc(const void *value, void **_pp, size_t *size)
             UINT64ENCODE_VAR(*pp, enc_value, enc_size);
 
             /* Encode name */
-            HDmemcpy(*pp, (uint8_t *)(efl->slot[u].name), len);
+            H5MM_memcpy(*pp, (uint8_t *)(efl->slot[u].name), len);
             *pp += len;
 
             /* Encode offset */
@@ -2035,7 +2035,7 @@ H5Pset_chunk(hid_t plist_id, int ndims, const hsize_t dim[/*ndims*/])
 #endif /* H5_HAVE_C99_DESIGNATED_INITIALIZER */
 
     /* Verify & initialize property's chunk dims */
-    HDmemcpy(&chunk_layout, &H5D_def_layout_chunk_g, sizeof(H5D_def_layout_chunk_g));
+    H5MM_memcpy(&chunk_layout, &H5D_def_layout_chunk_g, sizeof(H5D_def_layout_chunk_g));
     HDmemset(&chunk_layout.u.chunk.dim, 0, sizeof(chunk_layout.u.chunk.dim));
     chunk_nelmts = 1;
     for(u = 0; u < (unsigned)ndims; u++) {
@@ -2204,7 +2204,7 @@ H5Pset_virtual(hid_t dcpl_id, hid_t vspace_id, const char *src_file_name,
             HGOTO_ERROR(H5E_PLIST, H5E_CANTRESET, FAIL, "can't release layout message")
 
         /* Copy the default virtual layout */
-        HDmemcpy(&virtual_layout, &H5D_def_layout_virtual_g, sizeof(H5D_def_layout_virtual_g));
+        H5MM_memcpy(&virtual_layout, &H5D_def_layout_virtual_g, sizeof(H5D_def_layout_virtual_g));
 
         /* Sanity check */
         HDassert(virtual_layout.storage.u.virt.list_nalloc == 0);
@@ -3243,7 +3243,7 @@ H5Pset_fill_value(hid_t plist_id, hid_t type_id, const void *value)
         fill.size = (ssize_t)H5T_get_size(type);
         if(NULL == (fill.buf = H5MM_malloc((size_t)fill.size)))
             HGOTO_ERROR(H5E_RESOURCE, H5E_CANTINIT, FAIL, "memory allocation failed for fill value")
-        HDmemcpy(fill.buf, value, (size_t)fill.size);
+        H5MM_memcpy(fill.buf, value, (size_t)fill.size);
 
         /* Set up type conversion function */
         if(NULL == (tpath = H5T_path_find(type, type)))
@@ -3351,7 +3351,7 @@ H5P_get_fill_value(H5P_genplist_t *plist, const H5T_t *type, void *value/*out*/)
         if(H5T_path_bkg(tpath) && NULL == (bkg = H5MM_malloc(H5T_get_size(fill.type))))
             HGOTO_ERROR(H5E_PLIST, H5E_CANTALLOC, FAIL, "memory allocation failed for type conversion")
     } /* end else */
-    HDmemcpy(buf, fill.buf, H5T_get_size(fill.type));
+    H5MM_memcpy(buf, fill.buf, H5T_get_size(fill.type));
 
     /* Do the conversion */
     if((dst_id = H5I_register(H5I_DATATYPE, H5T_copy(type, H5T_COPY_TRANSIENT), FALSE)) < 0)
@@ -3359,7 +3359,7 @@ H5P_get_fill_value(H5P_genplist_t *plist, const H5T_t *type, void *value/*out*/)
     if(H5T_convert(tpath, src_id, dst_id, (size_t)1, (size_t)0, (size_t)0, buf, bkg) < 0)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTINIT, FAIL, "datatype conversion failed")
     if(buf != value)
-        HDmemcpy(value, buf, H5T_get_size(type));
+        H5MM_memcpy(value, buf, H5T_get_size(type));
 
 done:
     if(buf != value)
diff --git a/src/H5Pdxpl.c b/src/H5Pdxpl.c
index 8338d84..df9cf4e 100644
--- a/src/H5Pdxpl.c
+++ b/src/H5Pdxpl.c
@@ -695,7 +695,7 @@ H5P__dxfr_xform_enc(const void *value, void **_pp, size_t *size)
             HDassert(pexp);
 
             /* Copy the expression into the buffer */
-            HDmemcpy(*pp, (const uint8_t *)pexp, len);
+            H5MM_memcpy(*pp, (const uint8_t *)pexp, len);
             *pp += len;
             *pp[0] = '\0';
         } /* end if */
diff --git a/src/H5Pfapl.c b/src/H5Pfapl.c
index bfb52ff..57b20d7 100644
--- a/src/H5Pfapl.c
+++ b/src/H5Pfapl.c
@@ -1064,7 +1064,7 @@ H5P__file_driver_copy(void *value)
                 else if(driver->fapl_size > 0) {
                     if(NULL == (new_pl = H5MM_malloc(driver->fapl_size)))
                         HGOTO_ERROR(H5E_PLIST, H5E_CANTALLOC, FAIL, "driver info allocation failed")
-                    HDmemcpy(new_pl, info->driver_info, driver->fapl_size);
+                    H5MM_memcpy(new_pl, info->driver_info, driver->fapl_size);
                 } /* end else-if */
                 else
                     HGOTO_ERROR(H5E_PLIST, H5E_UNSUPPORTED, FAIL, "no way to copy driver info")
@@ -2597,7 +2597,7 @@ H5Pset_file_image(hid_t fapl_id, void *buf_ptr, size_t buf_len)
             HGOTO_ERROR(H5E_RESOURCE, H5E_CANTCOPY, FAIL, "image_memcpy callback failed")
         } /* end if */
     else
-            HDmemcpy(image_info.buffer, buf_ptr, buf_len);
+            H5MM_memcpy(image_info.buffer, buf_ptr, buf_len);
     } /* end if */
     else
         image_info.buffer = NULL;
@@ -2691,7 +2691,7 @@ H5Pget_file_image(hid_t fapl_id, void **buf_ptr_ptr, size_t *buf_len_ptr)
                     HGOTO_ERROR(H5E_RESOURCE, H5E_CANTCOPY, FAIL, "image_memcpy callback failed")
             } /* end if */
         else
-                HDmemcpy(copy_ptr, image_info.buffer, image_info.size);
+                H5MM_memcpy(copy_ptr, image_info.buffer, image_info.size);
         } /* end if */
 
         *buf_ptr_ptr = copy_ptr;
@@ -2894,7 +2894,7 @@ H5P__file_image_info_copy(void *value)
             HGOTO_ERROR(H5E_PLIST, H5E_CANTCOPY, FAIL, "image_memcpy callback failed")
             } /* end if */
         else
-                HDmemcpy(info->buffer, old_buffer, info->size);
+                H5MM_memcpy(info->buffer, old_buffer, info->size);
         } /* end if */
 
         /* Copy udata if it exists */
@@ -3089,7 +3089,7 @@ H5P__facc_cache_image_config_dec(const void **_pp, void *_value)
     HDcompile_assert(sizeof(size_t) <= sizeof(uint64_t));
 
     /* Set property to default value */
-    HDmemcpy(config, &H5F_def_mdc_initCacheImageCfg_g, sizeof(H5AC_cache_image_config_t));
+    H5MM_memcpy(config, &H5F_def_mdc_initCacheImageCfg_g, sizeof(H5AC_cache_image_config_t));
 
     /* Decode type sizes */
     enc_size = *(*pp)++;
@@ -3480,7 +3480,7 @@ H5P__facc_cache_config_enc(const void *value, void **_pp, size_t *size)
 
         H5_ENCODE_UNSIGNED(*pp, config->close_trace_file);
 
-        HDmemcpy(*pp, (const uint8_t *)(config->trace_file_name), (size_t)(H5AC__MAX_TRACE_FILE_NAME_LEN + 1));
+        H5MM_memcpy(*pp, (const uint8_t *)(config->trace_file_name), (size_t)(H5AC__MAX_TRACE_FILE_NAME_LEN + 1));
         *pp += H5AC__MAX_TRACE_FILE_NAME_LEN + 1;
 
         H5_ENCODE_UNSIGNED(*pp, config->evictions_enabled);
@@ -3615,7 +3615,7 @@ H5P__facc_cache_config_dec(const void **_pp, void *_value)
     HDcompile_assert(sizeof(size_t) <= sizeof(uint64_t));
 
     /* Set property to default value */
-    HDmemcpy(config, &H5F_def_mdc_initCacheCfg_g, sizeof(H5AC_cache_config_t));
+    H5MM_memcpy(config, &H5F_def_mdc_initCacheCfg_g, sizeof(H5AC_cache_config_t));
 
     /* Decode type sizes */
     enc_size = *(*pp)++;
@@ -4195,7 +4195,7 @@ H5Pget_mdc_log_options(hid_t plist_id, hbool_t *is_enabled, char *location,
 
     /* Copy log location to output buffer */
     if(location_ptr && location)
-        HDmemcpy(location, location_ptr, *location_size);
+        H5MM_memcpy(location, location_ptr, *location_size);
 
     /* Get location size, including terminating NULL */
     if(location_size) {
@@ -4250,7 +4250,7 @@ H5P_facc_mdc_log_location_enc(const void *value, void **_pp, size_t *size)
 
         /* encode the prefix */
         if(NULL != log_location) {
-            HDmemcpy(*(char **)pp, log_location, len);
+            H5MM_memcpy(*(char **)pp, log_location, len);
             *pp += len;
         } /* end if */
     } /* end if */
@@ -4536,7 +4536,7 @@ H5P__encode_coll_md_read_flag_t(const void *value, void **_pp, size_t *size)
 
     if(NULL != *pp) {
         /* Encode the value */
-        HDmemcpy(*pp, coll_md_read_flag, sizeof(H5P_coll_md_read_flag_t));
+        H5MM_memcpy(*pp, coll_md_read_flag, sizeof(H5P_coll_md_read_flag_t));
         *pp += sizeof(H5P_coll_md_read_flag_t);
     } /* end if */
 
diff --git a/src/H5Pint.c b/src/H5Pint.c
index e2ae792..e1b20a5 100644
--- a/src/H5Pint.c
+++ b/src/H5Pint.c
@@ -631,7 +631,7 @@ H5P__do_prop_cb1(H5SL_t *slist, H5P_genprop_t *prop, H5P_prp_cb1_t cb)
     /* Allocate space for a temporary copy of the property value */
     if(NULL == (tmp_value = H5MM_malloc(prop->size)))
         HGOTO_ERROR(H5E_PLIST, H5E_CANTALLOC, FAIL, "memory allocation failed for temporary property value")
-    HDmemcpy(tmp_value, prop->value, prop->size);
+    H5MM_memcpy(tmp_value, prop->value, prop->size);
 
     /* Call "type 1" callback ('create', 'copy' or 'close') */
     if(cb(prop->name, prop->size, tmp_value) < 0)
@@ -642,7 +642,7 @@ H5P__do_prop_cb1(H5SL_t *slist, H5P_genprop_t *prop, H5P_prp_cb1_t cb)
         HGOTO_ERROR(H5E_PLIST, H5E_CANTCOPY, FAIL, "Can't copy property")
 
     /* Copy the changed value into the new property */
-    HDmemcpy(pcopy->value, tmp_value, prop->size);
+    H5MM_memcpy(pcopy->value, tmp_value, prop->size);
 
     /* Insert the changed property into the property list */
     if(H5P__add_prop(slist, pcopy) < 0)
@@ -990,7 +990,7 @@ H5P__dup_prop(H5P_genprop_t *oprop, H5P_prop_within_t type)
         HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
 
     /* Copy basic property information */
-    HDmemcpy(prop, oprop, sizeof(H5P_genprop_t));
+    H5MM_memcpy(prop, oprop, sizeof(H5P_genprop_t));
 
     /* Check if we should duplicate the name or share it */
 
@@ -1030,7 +1030,7 @@ H5P__dup_prop(H5P_genprop_t *oprop, H5P_prop_within_t type)
         HDassert(prop->size > 0);
         if(NULL == (prop->value = H5MM_malloc(prop->size)))
             HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
-        HDmemcpy(prop->value, oprop->value, prop->size);
+        H5MM_memcpy(prop->value, oprop->value, prop->size);
     } /* end if */
 
     /* Set return value */
@@ -1117,7 +1117,7 @@ H5P__create_prop(const char *name, size_t size, H5P_prop_within_t type,
     if(value != NULL) {
         if(NULL == (prop->value = H5MM_malloc (prop->size)))
             HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
-        HDmemcpy(prop->value, value, prop->size);
+        H5MM_memcpy(prop->value, value, prop->size);
     } /* end if */
     else
         prop->value = NULL;
@@ -2727,7 +2727,7 @@ H5P__poke_plist_cb(H5P_genplist_t *plist, const char *name, H5P_genprop_t *prop,
         HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "property has zero size")
 
     /* Overwrite value in property */
-    HDmemcpy(prop->value, udata->value, prop->size);
+    H5MM_memcpy(prop->value, udata->value, prop->size);
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -2779,7 +2779,7 @@ H5P__poke_pclass_cb(H5P_genplist_t *plist, const char *name, H5P_genprop_t *prop
     if(NULL == (pcopy = H5P__dup_prop(prop, H5P_PROP_WITHIN_LIST)))
         HGOTO_ERROR(H5E_PLIST, H5E_CANTCOPY, FAIL, "Can't copy property")
 
-    HDmemcpy(pcopy->value, udata->value, pcopy->size);
+    H5MM_memcpy(pcopy->value, udata->value, pcopy->size);
 
     /* Insert the changed property into the property list */
     if(H5P__add_prop(plist->props, pcopy) < 0)
@@ -2888,7 +2888,7 @@ H5P__set_plist_cb(H5P_genplist_t *plist, const char *name, H5P_genprop_t *prop,
         /* Make a copy of the current value, in case the callback fails */
         if(NULL == (tmp_value = H5MM_malloc(prop->size)))
             HGOTO_ERROR(H5E_PLIST, H5E_CANTALLOC, FAIL, "memory allocation failed temporary property value")
-        HDmemcpy(tmp_value, udata->value, prop->size);
+        H5MM_memcpy(tmp_value, udata->value, prop->size);
 
         /* Call user's callback */
         if((*(prop->set))(plist->plist_id, name, prop->size, tmp_value) < 0)
@@ -2909,7 +2909,7 @@ H5P__set_plist_cb(H5P_genplist_t *plist, const char *name, H5P_genprop_t *prop,
     } /* end if */
 
     /* Copy new [possibly unchanged] value into property value */
-    HDmemcpy(prop->value, prp_value, prop->size);
+    H5MM_memcpy(prop->value, prp_value, prop->size);
 
 done:
     /* Free the temporary value buffer */
@@ -2968,7 +2968,7 @@ H5P__set_pclass_cb(H5P_genplist_t *plist, const char *name, H5P_genprop_t *prop,
         /* Make a copy of the current value, in case the callback fails */
         if(NULL == (tmp_value = H5MM_malloc(prop->size)))
             HGOTO_ERROR(H5E_PLIST, H5E_CANTALLOC, FAIL, "memory allocation failed temporary property value")
-        HDmemcpy(tmp_value, udata->value, prop->size);
+        H5MM_memcpy(tmp_value, udata->value, prop->size);
 
         /* Call user's callback */
         if((*(prop->set))(plist->plist_id, name, prop->size, tmp_value) < 0)
@@ -2985,7 +2985,7 @@ H5P__set_pclass_cb(H5P_genplist_t *plist, const char *name, H5P_genprop_t *prop,
     if(NULL == (pcopy = H5P__dup_prop(prop, H5P_PROP_WITHIN_LIST)))
         HGOTO_ERROR(H5E_PLIST, H5E_CANTCOPY, FAIL, "Can't copy property")
 
-    HDmemcpy(pcopy->value, prp_value, pcopy->size);
+    H5MM_memcpy(pcopy->value, prp_value, pcopy->size);
 
     /* Insert the changed property into the property list */
     if(H5P__add_prop(plist->props, pcopy) < 0)
@@ -4234,7 +4234,7 @@ H5P__peek_cb(H5P_genplist_t *plist, const char *name, H5P_genprop_t *prop,
         HGOTO_ERROR(H5E_PLIST, H5E_BADVALUE, FAIL, "property has zero size")
 
     /* Make a (shallow) copy of the value */
-    HDmemcpy(udata->value, prop->value, prop->size);
+    H5MM_memcpy(udata->value, prop->value, prop->size);
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -4334,18 +4334,18 @@ H5P__get_cb(H5P_genplist_t *plist, const char *name, H5P_genprop_t *prop,
         /* Make a copy of the current value, in case the callback fails */
         if(NULL == (tmp_value = H5MM_malloc(prop->size)))
             HGOTO_ERROR(H5E_PLIST, H5E_CANTALLOC, FAIL, "memory allocation failed temporary property value")
-        HDmemcpy(tmp_value, prop->value, prop->size);
+        H5MM_memcpy(tmp_value, prop->value, prop->size);
 
         /* Call user's callback */
         if((*(prop->get))(plist->plist_id, name, prop->size, tmp_value) < 0)
             HGOTO_ERROR(H5E_PLIST, H5E_CANTINIT, FAIL, "can't set property value")
 
         /* Copy new [possibly unchanged] value into return value */
-        HDmemcpy(udata->value, tmp_value, prop->size);
+        H5MM_memcpy(udata->value, tmp_value, prop->size);
     } /* end if */
     /* No 'get' callback, just copy value */
     else
-        HDmemcpy(udata->value, prop->value, prop->size);
+        H5MM_memcpy(udata->value, prop->value, prop->size);
 
 done:
     /* Free the temporary value buffer */
@@ -4518,7 +4518,7 @@ H5P__del_pclass_cb(H5P_genplist_t *plist, const char *name, H5P_genprop_t *prop,
         /* Allocate space for a temporary copy of the property value */
         if(NULL == (tmp_value = H5MM_malloc(prop->size)))
             HGOTO_ERROR(H5E_PLIST, H5E_CANTALLOC, FAIL, "memory allocation failed for temporary property value")
-        HDmemcpy(tmp_value, prop->value, prop->size);
+        H5MM_memcpy(tmp_value, prop->value, prop->size);
 
         /* Call user's callback */
         if((*(prop->del))(plist->plist_id, name, prop->size, tmp_value) < 0)
@@ -4967,7 +4967,7 @@ H5P_close(void *_plist)
                         /* Allocate space for a temporary copy of the property value */
                         if(NULL==(tmp_value=H5MM_malloc(tmp->size)))
                             HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed for temporary property value")
-                        HDmemcpy(tmp_value,tmp->value,tmp->size);
+                        H5MM_memcpy(tmp_value,tmp->value,tmp->size);
 
                         /* Call the 'close' callback */
                         (tmp->close)(tmp->name,tmp->size,tmp_value);
diff --git a/src/H5Plapl.c b/src/H5Plapl.c
index bedeed9..7a7cc23 100644
--- a/src/H5Plapl.c
+++ b/src/H5Plapl.c
@@ -715,7 +715,7 @@ H5P__lacc_elink_pref_enc(const void *value, void **_pp, size_t *size)
 
         /* encode the prefix */
         if(NULL != elink_pref) {
-            HDmemcpy(*(char **)pp, elink_pref, len);
+            H5MM_memcpy(*(char **)pp, elink_pref, len);
             *pp += len;
         } /* end if */
     } /* end if */
diff --git a/src/H5Pocpl.c b/src/H5Pocpl.c
index c2bf6cb..a60c593 100644
--- a/src/H5Pocpl.c
+++ b/src/H5Pocpl.c
@@ -1501,7 +1501,7 @@ H5P__ocrt_pipeline_enc(const void *value, void **_pp, size_t *size)
                 *(*pp)++ = (uint8_t)TRUE;
 
                 /* encode filter name */
-                HDmemcpy(*pp, (uint8_t *)(pline->filter[u].name), H5Z_COMMON_NAME_LEN);
+                H5MM_memcpy(*pp, (uint8_t *)(pline->filter[u].name), H5Z_COMMON_NAME_LEN);
                 *pp += H5Z_COMMON_NAME_LEN;
             } /* end if */
             else
diff --git a/src/H5Pocpypl.c b/src/H5Pocpypl.c
index 666a945..2dc92f9 100644
--- a/src/H5Pocpypl.c
+++ b/src/H5Pocpypl.c
@@ -384,7 +384,7 @@ H5P__ocpy_merge_comm_dt_list_enc(const void *value, void **_pp, size_t *size)
 
         /* Encode merge committed dtype list */
         if(*pp) {
-            HDmemcpy(*(char **)pp, dt_list->path, len);
+            H5MM_memcpy(*(char **)pp, dt_list->path, len);
             *pp += len;
         } /* end if */
 
diff --git a/src/H5S.c b/src/H5S.c
index 3a917bc..47c436d 100644
--- a/src/H5S.c
+++ b/src/H5S.c
@@ -1359,7 +1359,7 @@ H5S_set_extent_simple(H5S_t *space, unsigned rank, const hsize_t *dims,
          * same as the dimension */
         space->extent.max = (hsize_t *)H5FL_ARR_MALLOC(hsize_t, (size_t)rank);
         if(max != NULL)
-            HDmemcpy(space->extent.max, max, sizeof(hsize_t) * rank);
+            H5MM_memcpy(space->extent.max, max, sizeof(hsize_t) * rank);
         else
             for(u = 0; u < space->extent.rank; u++)
                 space->extent.max[u] = dims[u];
diff --git a/src/H5SL.c b/src/H5SL.c
index c0934ca..5f00fb8 100644
--- a/src/H5SL.c
+++ b/src/H5SL.c
@@ -240,7 +240,7 @@
         /* Allocate space for new forward pointers */                          \
         if(NULL == (_tmp = (H5SL_node_t **)H5FL_FAC_MALLOC(H5SL_fac_g[X->log_nalloc]))) \
             HGOTO_ERROR(H5E_SLIST, H5E_CANTALLOC, ERR, "memory allocation failed") \
-        HDmemcpy((void *)_tmp, (const void *)X->forward, (LVL + 1) * sizeof(H5SL_node_t *)); \
+        H5MM_memcpy((void *)_tmp, (const void *)X->forward, (LVL + 1) * sizeof(H5SL_node_t *)); \
         X->forward = (H5SL_node_t **)H5FL_FAC_FREE(H5SL_fac_g[X->log_nalloc-1], (void *)X->forward);  \
         X->forward = _tmp;                                                     \
     } /* end if */                                                             \
@@ -262,7 +262,7 @@
         /* Allocate space for new forward pointers */                          \
         if(NULL == (_tmp = (H5SL_node_t **)H5FL_FAC_MALLOC(H5SL_fac_g[X->log_nalloc]))) \
             HGOTO_ERROR(H5E_SLIST, H5E_NOSPACE, NULL, "memory allocation failed") \
-        HDmemcpy((void *)_tmp, (const void *)X->forward, (LVL) * sizeof(H5SL_node_t *)); \
+        H5MM_memcpy((void *)_tmp, (const void *)X->forward, (LVL) * sizeof(H5SL_node_t *)); \
         X->forward = (H5SL_node_t **)H5FL_FAC_FREE(H5SL_fac_g[X->log_nalloc+1], (void *)X->forward);  \
         X->forward = _tmp;                                                     \
     } /* end if */                                                             \
diff --git a/src/H5SM.c b/src/H5SM.c
index 0fa3489..3946f51 100644
--- a/src/H5SM.c
+++ b/src/H5SM.c
@@ -2318,7 +2318,7 @@ H5SM__read_iter_op(H5O_t *oh, H5O_mesg_t *mesg/*in,out*/, unsigned sequence,
             HGOTO_ERROR(H5E_SOHM, H5E_NOSPACE, H5_ITER_ERROR, "memory allocation failed")
 
         /* Copy the encoded message into the buffer to return */
-        HDmemcpy(udata->encoding_buf, mesg->raw, udata->buf_size);
+        H5MM_memcpy(udata->encoding_buf, mesg->raw, udata->buf_size);
 
         /* Found the message we were looking for */
         ret_value = H5_ITER_STOP;
@@ -2356,7 +2356,7 @@ H5SM__read_mesg_fh_cb(const void *obj, size_t obj_len, void *_udata)
         HGOTO_ERROR(H5E_SOHM, H5E_NOSPACE, FAIL, "memory allocation failed")
 
     /* Copy the message from the heap */
-    HDmemcpy(udata->encoding_buf, obj, obj_len);
+    H5MM_memcpy(udata->encoding_buf, obj, obj_len);
     udata->buf_size = obj_len;
 
 done:
diff --git a/src/H5SMbtree2.c b/src/H5SMbtree2.c
index f0c4963..0c4224b 100644
--- a/src/H5SMbtree2.c
+++ b/src/H5SMbtree2.c
@@ -248,7 +248,7 @@ H5SM_bt2_convert_to_list_op(const void * record, void *op_data)
     /* Insert this message at the end of the list */
     HDassert(list->messages[mesg_idx].location == H5SM_NO_LOC);
     HDassert(message->location != H5SM_NO_LOC);
-    HDmemcpy(&(list->messages[mesg_idx]), message, sizeof(H5SM_sohm_t));
+    H5MM_memcpy(&(list->messages[mesg_idx]), message, sizeof(H5SM_sohm_t));
 
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5SM_bt2_convert_to_list_op() */
diff --git a/src/H5SMcache.c b/src/H5SMcache.c
index f0b469a..49ce2b4 100644
--- a/src/H5SMcache.c
+++ b/src/H5SMcache.c
@@ -388,7 +388,7 @@ H5SM__cache_table_serialize(const H5F_t *f, void *_image, size_t len,
     HDassert(H5F_SOHM_VERS(f) == HDF5_SHAREDHEADER_VERSION);
 
     /* Encode magic number */
-    HDmemcpy(image, H5SM_TABLE_MAGIC, (size_t)H5_SIZEOF_MAGIC);
+    H5MM_memcpy(image, H5SM_TABLE_MAGIC, (size_t)H5_SIZEOF_MAGIC);
     image += H5_SIZEOF_MAGIC;
 
     /* Encode each index header */
@@ -710,7 +710,7 @@ H5SM__cache_list_serialize(const H5F_t *f, void *_image, size_t len,
     HDassert(list->header->list_size == len);
 
     /* Encode magic number */
-    HDmemcpy(image, H5SM_LIST_MAGIC, (size_t)H5_SIZEOF_MAGIC);
+    H5MM_memcpy(image, H5SM_LIST_MAGIC, (size_t)H5_SIZEOF_MAGIC);
     image += H5_SIZEOF_MAGIC;
 
     /* serialize messages from the messages array */
diff --git a/src/H5SMmessage.c b/src/H5SMmessage.c
index ad84b24..3e50fe5 100644
--- a/src/H5SMmessage.c
+++ b/src/H5SMmessage.c
@@ -302,7 +302,7 @@ H5SM__message_encode(uint8_t *raw, const void *_nrecord, void *_ctx)
 
     if(message->location == H5SM_IN_HEAP) {
         UINT32ENCODE(raw, message->u.heap_loc.ref_count);
-        HDmemcpy(raw, message->u.heap_loc.fheap_id.id, (size_t)H5O_FHEAP_ID_LEN);
+        H5MM_memcpy(raw, message->u.heap_loc.fheap_id.id, (size_t)H5O_FHEAP_ID_LEN);
     } /* end if */
     else {
         HDassert(message->location == H5SM_IN_OH);
@@ -343,7 +343,7 @@ H5SM__message_decode(const uint8_t *raw, void *_nrecord, void *_ctx)
 
     if(message->location == H5SM_IN_HEAP) {
         UINT32DECODE(raw, message->u.heap_loc.ref_count);
-        HDmemcpy(message->u.heap_loc.fheap_id.id, raw, (size_t)H5O_FHEAP_ID_LEN);
+        H5MM_memcpy(message->u.heap_loc.fheap_id.id, raw, (size_t)H5O_FHEAP_ID_LEN);
     } /* end if */
     else {
         HDassert(message->location == H5SM_IN_OH);
diff --git a/src/H5Shyper.c b/src/H5Shyper.c
index c9fab38..96f3894 100644
--- a/src/H5Shyper.c
+++ b/src/H5Shyper.c
@@ -554,10 +554,10 @@ H5S__hyper_iter_coords(const H5S_sel_iter_t *iter, hsize_t *coords)
             HDassert(v < 0);
         } /* end if */
         else
-            HDmemcpy(coords, iter->u.hyp.off, sizeof(hsize_t) * iter->rank);
+            H5MM_memcpy(coords, iter->u.hyp.off, sizeof(hsize_t) * iter->rank);
     } /* end if */
     else
-        HDmemcpy(coords, iter->u.hyp.off, sizeof(hsize_t) * iter->rank);
+        H5MM_memcpy(coords, iter->u.hyp.off, sizeof(hsize_t) * iter->rank);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5S__hyper_iter_coords() */
@@ -3819,18 +3819,18 @@ H5S__hyper_span_blocklist(const H5S_hyper_span_info_t *spans, hsize_t start[],
 
                 /* Copy previous starting points */
                 for(u = 0; u < rank; u++, (*buf)++)
-                    HDmemcpy(*buf, &start[u], sizeof(hsize_t));
+                    H5MM_memcpy(*buf, &start[u], sizeof(hsize_t));
 
                 /* Copy starting point for this span */
-                HDmemcpy(*buf, &curr->low, sizeof(hsize_t));
+                H5MM_memcpy(*buf, &curr->low, sizeof(hsize_t));
                 (*buf)++;
 
                 /* Copy previous ending points */
                 for(u = 0; u < rank; u++, (*buf)++)
-                    HDmemcpy(*buf, &end[u], sizeof(hsize_t));
+                    H5MM_memcpy(*buf, &end[u], sizeof(hsize_t));
 
                 /* Copy starting point for this span */
-                HDmemcpy(*buf, &curr->high, sizeof(hsize_t));
+                H5MM_memcpy(*buf, &curr->high, sizeof(hsize_t));
                 (*buf)++;
 
                 /* Decrement the number of blocks processed */
@@ -3943,11 +3943,11 @@ H5S__get_select_hyper_blocklist(H5S_t *space, hbool_t internal, hsize_t startblo
                 /* Check if we should copy this block information */
                 if(startblock == 0) {
                     /* Copy the starting location */
-                    HDmemcpy(buf, offset, sizeof(hsize_t) * ndims);
+                    H5MM_memcpy(buf, offset, sizeof(hsize_t) * ndims);
                     buf += ndims;
 
                     /* Compute the ending location */
-                    HDmemcpy(buf, offset, sizeof(hsize_t) * ndims);
+                    H5MM_memcpy(buf, offset, sizeof(hsize_t) * ndims);
                     for(u = 0; u < ndims; u++)
                         buf[u] += (diminfo[u].block - 1);
                     buf += ndims;
@@ -6029,7 +6029,7 @@ H5S_hyper_denormalize_offset(H5S_t *space, const hssize_t *old_offset)
         HGOTO_ERROR(H5E_DATASPACE, H5E_CANTSET, FAIL, "can't adjust selection")
 
     /* Copy the selection offset over */
-    HDmemcpy(space->select.offset, old_offset, sizeof(hssize_t) * space->extent.rank);
+    H5MM_memcpy(space->select.offset, old_offset, sizeof(hssize_t) * space->extent.rank);
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -7255,7 +7255,7 @@ H5S__hyper_rebuild_helper(const H5S_hyper_span_t *span, H5S_hyper_dim_t span_sla
             if(!H5S__hyper_rebuild_helper(span->down->head, span_slab_info, rank - 1))
                 HGOTO_DONE(FALSE)
 
-            HDmemcpy(canon_down_span_slab_info, span_slab_info, sizeof(H5S_hyper_dim_t) * rank);
+            H5MM_memcpy(canon_down_span_slab_info, span_slab_info, sizeof(H5S_hyper_dim_t) * rank);
         } /* end if */
 
         /* Assign the initial starting point & block size */
diff --git a/src/H5Spoint.c b/src/H5Spoint.c
index 6411b94..e62b48d 100644
--- a/src/H5Spoint.c
+++ b/src/H5Spoint.c
@@ -203,7 +203,7 @@ H5S__point_iter_coords(const H5S_sel_iter_t *iter, hsize_t *coords)
     HDassert(coords);
 
     /* Copy the offset of the current point */
-    HDmemcpy(coords, iter->u.pnt.curr->pnt, sizeof(hsize_t) * iter->rank);
+    H5MM_memcpy(coords, iter->u.pnt.curr->pnt, sizeof(hsize_t) * iter->rank);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5S__point_iter_coords() */
@@ -233,8 +233,8 @@ H5S__point_iter_block(const H5S_sel_iter_t *iter, hsize_t *start, hsize_t *end)
     HDassert(end);
 
     /* Copy the current point as a block */
-    HDmemcpy(start, iter->u.pnt.curr->pnt, sizeof(hsize_t) * iter->rank);
-    HDmemcpy(end, iter->u.pnt.curr->pnt, sizeof(hsize_t) * iter->rank);
+    H5MM_memcpy(start, iter->u.pnt.curr->pnt, sizeof(hsize_t) * iter->rank);
+    H5MM_memcpy(end, iter->u.pnt.curr->pnt, sizeof(hsize_t) * iter->rank);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
 } /* end H5S__point_iter_block() */
@@ -581,7 +581,7 @@ H5S__point_add(H5S_t *space, H5S_seloper_t op, size_t num_elem, const hsize_t *c
             HGOTO_ERROR(H5E_DATASPACE, H5E_CANTALLOC, FAIL, "can't allocate coordinate information")
 
         /* Copy over the coordinates */
-        HDmemcpy(new_node->pnt, coord + (u * space->extent.rank), (space->extent.rank * sizeof(hsize_t)));
+        H5MM_memcpy(new_node->pnt, coord + (u * space->extent.rank), (space->extent.rank * sizeof(hsize_t)));
 
         /* Link into list */
         if(top == NULL)
@@ -799,7 +799,7 @@ H5S__point_copy(H5S_t *dst, const H5S_t *src, hbool_t H5_ATTR_UNUSED share_selec
         } /* end if */
 
         /* Copy over the point's coordinates */
-        HDmemcpy(new_node->pnt, curr->pnt, (src->extent.rank * sizeof(hsize_t)));
+        H5MM_memcpy(new_node->pnt, curr->pnt, (src->extent.rank * sizeof(hsize_t)));
 
         /* Keep the order the same when copying */
         if(NULL == new_tail)
@@ -1165,7 +1165,7 @@ H5S__get_select_elem_pointlist(const H5S_t *space, hsize_t startpoint,
 
     /* Iterate through the node, copying each point's information */
     while(node != NULL && numpoints > 0) {
-        HDmemcpy(buf, node->pnt, sizeof(hsize_t) * rank);
+        H5MM_memcpy(buf, node->pnt, sizeof(hsize_t) * rank);
         buf += rank;
         numpoints--;
         node = node->next;
@@ -1649,7 +1649,7 @@ H5S__point_project_simple(const H5S_t *base_space, H5S_t *new_space, hsize_t *of
 
         /* Calculate offset of selection in projected buffer */
         HDmemset(block, 0, sizeof(block));
-        HDmemcpy(block, base_space->select.sel_info.pnt_lst->head->pnt, sizeof(hsize_t) * rank_diff);
+        H5MM_memcpy(block, base_space->select.sel_info.pnt_lst->head->pnt, sizeof(hsize_t) * rank_diff);
         *offset = H5VM_array_offset(base_space->extent.rank, base_space->extent.size, block);
 
         /* Iterate through base space's point nodes, copying the point information */
@@ -1666,7 +1666,7 @@ H5S__point_project_simple(const H5S_t *base_space, H5S_t *new_space, hsize_t *of
             } /* end if */
 
             /* Copy over the point's coordinates */
-            HDmemcpy(new_node->pnt, &base_node->pnt[rank_diff], (new_space->extent.rank * sizeof(hsize_t)));
+            H5MM_memcpy(new_node->pnt, &base_node->pnt[rank_diff], (new_space->extent.rank * sizeof(hsize_t)));
 
             /* Keep the order the same when copying */
             if(NULL == prev_node)
@@ -1704,7 +1704,7 @@ H5S__point_project_simple(const H5S_t *base_space, H5S_t *new_space, hsize_t *of
 
             /* Copy over the point's coordinates */
             HDmemset(new_node->pnt, 0, sizeof(hsize_t) * rank_diff);
-            HDmemcpy(&new_node->pnt[rank_diff], base_node->pnt, (new_space->extent.rank * sizeof(hsize_t)));
+            H5MM_memcpy(&new_node->pnt[rank_diff], base_node->pnt, (new_space->extent.rank * sizeof(hsize_t)));
 
             /* Keep the order the same when copying */
             if(NULL == prev_node)
diff --git a/src/H5Sselect.c b/src/H5Sselect.c
index 24586de..ef38746 100644
--- a/src/H5Sselect.c
+++ b/src/H5Sselect.c
@@ -114,7 +114,7 @@ H5S_select_offset(H5S_t *space, const hssize_t *offset)
     HDassert(offset);
 
     /* Copy the offset over */
-    HDmemcpy(space->select.offset, offset, sizeof(hssize_t) * space->extent.rank);
+    H5MM_memcpy(space->select.offset, offset, sizeof(hssize_t) * space->extent.rank);
 
     /* Indicate that the offset was changed */
     space->select.offset_changed = TRUE;
@@ -1538,7 +1538,7 @@ H5S_select_iterate(void *buf, const H5T_t *type, const H5S_t *space,
     if(ndims > 0) {
 	/* Copy the size of the space */
 	HDassert(space->extent.size);
-	HDmemcpy(space_size, space->extent.size, ndims * sizeof(hsize_t));
+	H5MM_memcpy(space_size, space->extent.size, ndims * sizeof(hsize_t));
     } /* end if */
     space_size[ndims] = elmt_size;
 
@@ -2192,16 +2192,16 @@ H5S_select_construct_projection(const H5S_t *base_space, H5S_t **new_space_ptr,
             rank_diff = new_space_rank - base_space_rank;
             H5VM_array_fill(new_space_dims, &tmp_dim_size, sizeof(tmp_dim_size), rank_diff);
             H5VM_array_fill(new_space_maxdims, &tmp_dim_size, sizeof(tmp_dim_size), rank_diff);
-            HDmemcpy(&new_space_dims[rank_diff], base_space_dims, sizeof(new_space_dims[0]) * base_space_rank);
-            HDmemcpy(&new_space_maxdims[rank_diff], base_space_maxdims, sizeof(new_space_maxdims[0]) * base_space_rank);
+            H5MM_memcpy(&new_space_dims[rank_diff], base_space_dims, sizeof(new_space_dims[0]) * base_space_rank);
+            H5MM_memcpy(&new_space_maxdims[rank_diff], base_space_maxdims, sizeof(new_space_maxdims[0]) * base_space_rank);
         } /* end if */
         else { /* new_space_rank < base_space_rank */
             /* we must copy the fastest changing dimension of the
              * base space into the dimensions of the new space.
              */
             rank_diff = base_space_rank - new_space_rank;
-            HDmemcpy(new_space_dims, &base_space_dims[rank_diff], sizeof(new_space_dims[0]) * new_space_rank);
-            HDmemcpy(new_space_maxdims, &base_space_maxdims[rank_diff], sizeof(new_space_maxdims[0]) * new_space_rank);
+            H5MM_memcpy(new_space_dims, &base_space_dims[rank_diff], sizeof(new_space_dims[0]) * new_space_rank);
+            H5MM_memcpy(new_space_maxdims, &base_space_maxdims[rank_diff], sizeof(new_space_maxdims[0]) * new_space_rank);
         } /* end else */
 
         /* now have the new space rank and dimensions set up --
@@ -2232,10 +2232,10 @@ H5S_select_construct_projection(const H5S_t *base_space, H5S_t **new_space_ptr,
         if(H5S_GET_EXTENT_TYPE(base_space) == H5S_SIMPLE && base_space->select.offset_changed) {
             if(new_space_rank > base_space_rank) {
                 HDmemset(new_space->select.offset, 0, sizeof(new_space->select.offset[0]) * rank_diff);
-                HDmemcpy(&new_space->select.offset[rank_diff], base_space->select.offset, sizeof(new_space->select.offset[0]) * base_space_rank);
+                H5MM_memcpy(&new_space->select.offset[rank_diff], base_space->select.offset, sizeof(new_space->select.offset[0]) * base_space_rank);
             } /* end if */
             else
-                HDmemcpy(new_space->select.offset, &base_space->select.offset[rank_diff], sizeof(new_space->select.offset[0]) * new_space_rank);
+                H5MM_memcpy(new_space->select.offset, &base_space->select.offset[rank_diff], sizeof(new_space->select.offset[0]) * new_space_rank);
 
             /* Propagate the offset changed flag into the new dataspace. */
             new_space->select.offset_changed = TRUE;
diff --git a/src/H5T.c b/src/H5T.c
index ad36492..1c4acb9 100644
--- a/src/H5T.c
+++ b/src/H5T.c
@@ -3338,7 +3338,7 @@ H5T_copy(H5T_t *old_dt, H5T_copy_t method)
                         if (NULL == new_dt->shared->u.compnd.memb)
                             HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
 
-                        HDmemcpy(new_dt->shared->u.compnd.memb, old_dt->shared->u.compnd.memb,
+                        H5MM_memcpy(new_dt->shared->u.compnd.memb, old_dt->shared->u.compnd.memb,
                                 new_dt->shared->u.compnd.nmembs * sizeof(H5T_cmemb_t));
                     } /* end if */
 
@@ -3404,7 +3404,7 @@ H5T_copy(H5T_t *old_dt, H5T_copy_t method)
                         (uint8_t *)H5MM_malloc(new_dt->shared->u.enumer.nalloc * new_dt->shared->size);
                 if(NULL == new_dt->shared->u.enumer.value)
                     HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, NULL, "memory allocation failed")
-                HDmemcpy(new_dt->shared->u.enumer.value, old_dt->shared->u.enumer.value,
+                H5MM_memcpy(new_dt->shared->u.enumer.value, old_dt->shared->u.enumer.value,
                         new_dt->shared->u.enumer.nmembs * new_dt->shared->size);
                 for(i = 0; i < new_dt->shared->u.enumer.nmembs; i++) {
                     s = old_dt->shared->u.enumer.name[i];
diff --git a/src/H5Tcommit.c b/src/H5Tcommit.c
index 712b264..c6b85a5 100644
--- a/src/H5Tcommit.c
+++ b/src/H5Tcommit.c
@@ -1211,7 +1211,7 @@ H5T_save_refresh_state(hid_t tid, H5O_shared_t *cached_H5O_shared)
         HGOTO_ERROR(H5E_DATATYPE, H5E_CANTINC, FAIL, "can't increment object count")
 
     /* Cache the H5O_shared_t data */
-    HDmemcpy(cached_H5O_shared, &(vol_dt->sh_loc), sizeof(H5O_shared_t));
+    H5MM_memcpy(cached_H5O_shared, &(vol_dt->sh_loc), sizeof(H5O_shared_t));
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -1245,7 +1245,7 @@ H5T_restore_refresh_state(hid_t tid, H5O_shared_t *cached_H5O_shared)
         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, FAIL, "tid is not not a named datatype ID")
 
     /* Restore the H5O_shared_t data */
-    HDmemcpy(&(vol_dt->sh_loc), cached_H5O_shared, sizeof(H5O_shared_t));
+    H5MM_memcpy(&(vol_dt->sh_loc), cached_H5O_shared, sizeof(H5O_shared_t));
 
     /* Decrement the ref. count for this object in the top file */
     if(H5FO_top_decr(vol_dt->sh_loc.file, vol_dt->sh_loc.u.loc.oh_addr) < 0)
diff --git a/src/H5Tconv.c b/src/H5Tconv.c
index 9a1105b..7d47483 100644
--- a/src/H5Tconv.c
+++ b/src/H5Tconv.c
@@ -828,7 +828,7 @@ done:                                                                         \
 
 /* Macro defining action on source data which needs to be aligned (before main action) */
 #define H5T_CONV_LOOP_PRE_SALIGN(ST) {					      \
-    HDmemcpy(&src_aligned, src, sizeof(ST));				      \
+    H5MM_memcpy(&src_aligned, src, sizeof(ST));				      \
 }
 
 /* Macro defining action on source data which doesn't need to be aligned (before main action) */
@@ -854,7 +854,7 @@ done:                                                                         \
 
 /* Macro defining action on destination data which needs to be aligned (after main action) */
 #define H5T_CONV_LOOP_POST_DALIGN(DT) {					      \
-    HDmemcpy(dst, &dst_aligned, sizeof(DT));				      \
+    H5MM_memcpy(dst, &dst_aligned, sizeof(DT));				      \
 }
 
 /* Macro defining action on destination data which doesn't need to be aligned (after main action) */
@@ -1797,7 +1797,7 @@ H5T__conv_b_b(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                  * should copy the value to the true destination buffer.
                  */
                 if(d == dbuf)
-                    HDmemcpy(dp, d, dst->shared->size);
+                    H5MM_memcpy(dp, d, dst->shared->size);
                 if(buf_stride) {
                     sp += direction * (ssize_t)buf_stride; /* Note that cast is checked with H5_CHECK_OVERFLOW, above */
                     dp += direction * (ssize_t)buf_stride; /* Note that cast is checked with H5_CHECK_OVERFLOW, above */
@@ -2852,7 +2852,7 @@ H5T__conv_enum(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                         else if(except_ret == H5T_CONV_ABORT)
                             HGOTO_ERROR(H5E_DATATYPE, H5E_CANTCONVERT, FAIL, "can't handle conversion exception")
                     } else
-                        HDmemcpy(d,
+                        H5MM_memcpy(d,
                                  dst->shared->u.enumer.value + (unsigned)priv->src2dst[n] * dst->shared->size,
                                  dst->shared->size);
                 } /* end if */
@@ -2888,7 +2888,7 @@ H5T__conv_enum(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                     } /* end if */
                     else {
                         HDassert(priv->src2dst[md] >= 0);
-                        HDmemcpy(d,
+                        H5MM_memcpy(d,
                                  dst->shared->u.enumer.value + (unsigned)priv->src2dst[md] * dst->shared->size,
                                  dst->shared->size);
                     } /* end else */
@@ -3846,7 +3846,7 @@ H5T__conv_i_i(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                  * should copy the value to the true destination buffer.
                  */
                 if(d==dbuf)
-                    HDmemcpy(dp, d, dst->shared->size);
+                    H5MM_memcpy(dp, d, dst->shared->size);
 
                 /* Advance source & destination pointers by delta amounts */
                 sp += src_delta;
@@ -4432,7 +4432,7 @@ H5T__conv_f_f(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                  */
             next:
                 if(d == dbuf)
-                    HDmemcpy(dp, d, dst_p->shared->size);
+                    H5MM_memcpy(dp, d, dst_p->shared->size);
 
                 /* Advance source & destination pointers by delta amounts */
                 sp += src_delta;
@@ -4604,7 +4604,7 @@ H5T__conv_s_s(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                             --nchars;
                         nchars = MIN(dst->shared->size, nchars);
                         if(d != s)
-                            HDmemcpy(d, s, nchars);
+                            H5MM_memcpy(d, s, nchars);
                         break;
 
                     case H5T_STR_RESERVED_3:
@@ -4666,7 +4666,7 @@ H5T__conv_s_s(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                  * should copy the value to the true destination buffer.
                  */
                 if(d == dbuf)
-                    HDmemcpy(dp, d, dst->shared->size);
+                    H5MM_memcpy(dp, d, dst->shared->size);
 
                 /* Advance source & destination pointers by delta amounts */
                 sp += src_delta;
@@ -8825,7 +8825,7 @@ H5T__conv_f_i(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                  * should copy the value to the true destination buffer.
                  */
                 if (d==dbuf)
-                    HDmemcpy (dp, d, dst_p->shared->size);
+                    H5MM_memcpy (dp, d, dst_p->shared->size);
                 if (buf_stride) {
                     sp += direction * (ssize_t) buf_stride;
                     dp += direction * (ssize_t) buf_stride;
@@ -9235,7 +9235,7 @@ H5T__conv_i_f(hid_t src_id, hid_t dst_id, H5T_cdata_t *cdata, size_t nelmts,
                  * should copy the value to the true destination buffer.
                  */
                 if (d==dbuf)
-                    HDmemcpy (dp, d, dst_p->shared->size);
+                    H5MM_memcpy (dp, d, dst_p->shared->size);
                 if (buf_stride) {
                     sp += direction * (ssize_t) buf_stride;
                     dp += direction * (ssize_t) buf_stride;
diff --git a/src/H5Tenum.c b/src/H5Tenum.c
index 0ed1775..ff88fab 100644
--- a/src/H5Tenum.c
+++ b/src/H5Tenum.c
@@ -223,7 +223,7 @@ H5T__enum_insert(const H5T_t *dt, const char *name, const void *value)
     dt->shared->u.enumer.sorted = H5T_SORT_NONE;
     i = dt->shared->u.enumer.nmembs++;
     dt->shared->u.enumer.name[i] = H5MM_xstrdup(name);
-    HDmemcpy(dt->shared->u.enumer.value+i*dt->shared->size, value, dt->shared->size);
+    H5MM_memcpy(dt->shared->u.enumer.value+i*dt->shared->size, value, dt->shared->size);
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -298,7 +298,7 @@ H5T__get_member_value(const H5T_t *dt, unsigned membno, void *value/*out*/)
     HDassert(dt);
     HDassert(value);
 
-    HDmemcpy(value, dt->shared->u.enumer.value + membno*dt->shared->size, dt->shared->size);
+    H5MM_memcpy(value, dt->shared->u.enumer.value + membno*dt->shared->size, dt->shared->size);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
 }
@@ -569,7 +569,7 @@ H5T_enum_valueof(const H5T_t *dt, const char *name, void *value/*out*/)
     if (cmp!=0)
         HGOTO_ERROR(H5E_DATATYPE, H5E_NOTFOUND, FAIL, "string doesn't exist in the enumeration type")
 
-    HDmemcpy(value, copied_dt->shared->u.enumer.value+md*copied_dt->shared->size, copied_dt->shared->size);
+    H5MM_memcpy(value, copied_dt->shared->u.enumer.value+md*copied_dt->shared->size, copied_dt->shared->size);
 
 done:
     if(copied_dt)
diff --git a/src/H5Tfields.c b/src/H5Tfields.c
index be62d85..8202c2c 100644
--- a/src/H5Tfields.c
+++ b/src/H5Tfields.c
@@ -351,10 +351,10 @@ H5T__sort_value(const H5T_t *dt, int *map)
 			dt->shared->u.enumer.name[j + 1] = tmp;
 
 			/* Swap values */
-			HDmemcpy(tbuf, dt->shared->u.enumer.value + (j * size), size);
-			HDmemcpy(dt->shared->u.enumer.value + (j * size),
+			H5MM_memcpy(tbuf, dt->shared->u.enumer.value + (j * size), size);
+			H5MM_memcpy(dt->shared->u.enumer.value + (j * size),
 				 dt->shared->u.enumer.value + ((j + 1) * size), size);
-			HDmemcpy(dt->shared->u.enumer.value + ((j + 1) * size), tbuf, size);
+			H5MM_memcpy(dt->shared->u.enumer.value + ((j + 1) * size), tbuf, size);
 
 			/* Swap map */
 			if(map) {
@@ -457,10 +457,10 @@ H5T__sort_name(const H5T_t *dt, int *map)
 			dt->shared->u.enumer.name[j+1] = tmp;
 
 			/* Swap values */
-			HDmemcpy(tbuf, dt->shared->u.enumer.value+j*size, size);
-			HDmemcpy(dt->shared->u.enumer.value+j*size,
+			H5MM_memcpy(tbuf, dt->shared->u.enumer.value+j*size, size);
+			H5MM_memcpy(dt->shared->u.enumer.value+j*size,
 				 dt->shared->u.enumer.value+(j+1)*size, size);
-			HDmemcpy(dt->shared->u.enumer.value+(j+1)*size, tbuf, size);
+			H5MM_memcpy(dt->shared->u.enumer.value+(j+1)*size, tbuf, size);
 
 			/* Swap map */
 			if (map) {
diff --git a/src/H5Tnative.c b/src/H5Tnative.c
index c9ad01a..3554f75 100644
--- a/src/H5Tnative.c
+++ b/src/H5Tnative.c
@@ -369,7 +369,7 @@ H5T__get_native_type(H5T_t *dtype, H5T_direction_t direction, size_t *struct_ali
                         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "cannot get member name")
                     if(H5T__get_member_value(dtype, u, tmp_memb_value) < 0)
                         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "cannot get member value")
-                    HDmemcpy(memb_value, tmp_memb_value, H5T_get_size(super_type));
+                    H5MM_memcpy(memb_value, tmp_memb_value, H5T_get_size(super_type));
 
                     if(H5T_convert(tpath, super_type_id, nat_super_type_id, (size_t)1, (size_t)0, (size_t)0, memb_value, NULL) < 0)
                         HGOTO_ERROR(H5E_ARGS, H5E_BADTYPE, NULL, "cannot get member value")
diff --git a/src/H5Tvlen.c b/src/H5Tvlen.c
index 841637d..bafb47f 100644
--- a/src/H5Tvlen.c
+++ b/src/H5Tvlen.c
@@ -302,7 +302,7 @@ H5T_vlen_seq_mem_getlen(const void *_vl)
     FUNC_LEAVE_NOAPI((ssize_t)vl->len)
 #else
     HDassert(_vl);
-    HDmemcpy(&vl, _vl, sizeof(hvl_t));
+    H5MM_memcpy(&vl, _vl, sizeof(hvl_t));
 
     FUNC_LEAVE_NOAPI((ssize_t)vl.len)
 #endif
@@ -339,7 +339,7 @@ H5T_vlen_seq_mem_getptr(void *_vl)
     FUNC_LEAVE_NOAPI(vl->p)
 #else
     HDassert(_vl);
-    HDmemcpy(&vl, _vl, sizeof(hvl_t));
+    H5MM_memcpy(&vl, _vl, sizeof(hvl_t));
 
     FUNC_LEAVE_NOAPI(vl.p)
 #endif
@@ -376,7 +376,7 @@ H5T_vlen_seq_mem_isnull(const H5F_t H5_ATTR_UNUSED *f, void *_vl)
     FUNC_LEAVE_NOAPI((vl->len==0 || vl->p==NULL) ? TRUE : FALSE)
 #else
     HDassert(_vl);
-    HDmemcpy(&vl, _vl, sizeof(hvl_t));
+    H5MM_memcpy(&vl, _vl, sizeof(hvl_t));
 
     FUNC_LEAVE_NOAPI((vl.len==0 || vl.p==NULL) ? TRUE : FALSE)
 #endif
@@ -411,13 +411,13 @@ H5T_vlen_seq_mem_read(H5F_t H5_ATTR_UNUSED *f, void *_vl, void *buf, size_t len)
 #ifdef H5_NO_ALIGNMENT_RESTRICTIONS
     HDassert(vl && vl->p);
 
-    HDmemcpy(buf,vl->p,len);
+    H5MM_memcpy(buf,vl->p,len);
 #else
     HDassert(_vl);
-    HDmemcpy(&vl, _vl, sizeof(hvl_t));
+    H5MM_memcpy(&vl, _vl, sizeof(hvl_t));
     HDassert(vl.p);
 
-    HDmemcpy(buf,vl.p,len);
+    H5MM_memcpy(buf,vl.p,len);
 #endif
 
     FUNC_LEAVE_NOAPI(SUCCEED)
@@ -463,7 +463,7 @@ H5T_vlen_seq_mem_write(H5F_t H5_ATTR_UNUSED *f, const H5T_vlen_alloc_info_t *vl_
           } /* end else */
 
         /* Copy the data into the newly allocated buffer */
-        HDmemcpy(vl.p,buf,len);
+        H5MM_memcpy(vl.p,buf,len);
 
     } /* end if */
     else
@@ -473,7 +473,7 @@ H5T_vlen_seq_mem_write(H5F_t H5_ATTR_UNUSED *f, const H5T_vlen_alloc_info_t *vl_
     vl.len=seq_len;
 
     /* Set pointer in user's buffer with memcpy, to avoid alignment issues */
-    HDmemcpy(_vl,&vl,sizeof(hvl_t));
+    H5MM_memcpy(_vl,&vl,sizeof(hvl_t));
 
 done:
     FUNC_LEAVE_NOAPI(ret_value)
@@ -507,7 +507,7 @@ H5T_vlen_seq_mem_setnull(H5F_t H5_ATTR_UNUSED *f, void *_vl, void H5_ATTR_UNUSED
     vl.p=NULL;
 
     /* Set pointer in user's buffer with memcpy, to avoid alignment issues */
-    HDmemcpy(_vl,&vl,sizeof(hvl_t));
+    H5MM_memcpy(_vl,&vl,sizeof(hvl_t));
 
     FUNC_LEAVE_NOAPI(SUCCEED)
 }   /* end H5T_vlen_seq_mem_setnull() */
@@ -541,7 +541,7 @@ H5T_vlen_str_mem_getlen(const void *_vl)
     HDassert(s);
 #else
     HDassert(_vl);
-    HDmemcpy(&s, _vl, sizeof(char *));
+    H5MM_memcpy(&s, _vl, sizeof(char *));
 #endif
 
     FUNC_LEAVE_NOAPI((ssize_t)HDstrlen(s))
@@ -576,7 +576,7 @@ H5T_vlen_str_mem_getptr(void *_vl)
     HDassert(s);
 #else
     HDassert(_vl);
-    HDmemcpy(&s, _vl, sizeof(char *));
+    H5MM_memcpy(&s, _vl, sizeof(char *));
 #endif
 
     FUNC_LEAVE_NOAPI(s)
@@ -607,7 +607,7 @@ H5T_vlen_str_mem_isnull(const H5F_t H5_ATTR_UNUSED *f, void *_vl)
     FUNC_ENTER_NOAPI_NOINIT_NOERR
 
 #ifndef H5_NO_ALIGNMENT_RESTRICTIONS
-    HDmemcpy(&s, _vl, sizeof(char *));
+    H5MM_memcpy(&s, _vl, sizeof(char *));
 #endif
 
     FUNC_LEAVE_NOAPI(s==NULL ? TRUE : FALSE)
@@ -644,10 +644,10 @@ H5T_vlen_str_mem_read(H5F_t H5_ATTR_UNUSED *f, void *_vl, void *buf, size_t len)
         HDassert(s);
 #else
         HDassert(_vl);
-        HDmemcpy(&s, _vl, sizeof(char *));
+        H5MM_memcpy(&s, _vl, sizeof(char *));
 #endif
 
-        HDmemcpy(buf,s,len);
+        H5MM_memcpy(buf,s,len);
     } /* end if */
 
     FUNC_LEAVE_NOAPI(SUCCEED)
@@ -690,11 +690,11 @@ H5T_vlen_str_mem_write(H5F_t H5_ATTR_UNUSED *f, const H5T_vlen_alloc_info_t *vl_
       } /* end else */
 
     len=(seq_len*base_size);
-    HDmemcpy(t,buf,len);
+    H5MM_memcpy(t,buf,len);
     t[len]='\0';
 
     /* Set pointer in user's buffer with memcpy, to avoid alignment issues */
-    HDmemcpy(_vl,&t,sizeof(char *));
+    H5MM_memcpy(_vl,&t,sizeof(char *));
 
 done:
     FUNC_LEAVE_NOAPI(ret_value) /*lint !e429 The pointer in 't' has been copied */
@@ -721,7 +721,7 @@ H5T_vlen_str_mem_setnull(H5F_t H5_ATTR_UNUSED *f, void *_vl, void H5_ATTR_UNUSED
     FUNC_ENTER_NOAPI_NOINIT_NOERR
 
     /* Set pointer in user's buffer with memcpy, to avoid alignment issues */
-    HDmemcpy(_vl,&t,sizeof(char *));
+    H5MM_memcpy(_vl,&t,sizeof(char *));
 
     FUNC_LEAVE_NOAPI(SUCCEED) /*lint !e429 The pointer in 't' has been copied */
 }   /* end H5T_vlen_str_mem_setnull() */
diff --git a/src/H5VLcallback.c b/src/H5VLcallback.c
index 5a5d9ee..2d5b7d8 100644
--- a/src/H5VLcallback.c
+++ b/src/H5VLcallback.c
@@ -355,7 +355,7 @@ H5VL_copy_connector_info(const H5VL_class_t *connector, void **dst_info,
         else if(connector->info_cls.size > 0) {
             if(NULL == (new_connector_info = H5MM_malloc(connector->info_cls.size)))
                 HGOTO_ERROR(H5E_VOL, H5E_CANTALLOC, FAIL, "connector info allocation failed")
-            HDmemcpy(new_connector_info, src_info, connector->info_cls.size);
+            H5MM_memcpy(new_connector_info, src_info, connector->info_cls.size);
         } /* end else-if */
         else
             HGOTO_ERROR(H5E_VOL, H5E_UNSUPPORTED, FAIL, "no way to copy connector info")
diff --git a/src/H5VLint.c b/src/H5VLint.c
index 7aeea02..9d9dc94 100644
--- a/src/H5VLint.c
+++ b/src/H5VLint.c
@@ -681,7 +681,7 @@ H5VL_register_connector(const void *_cls, hbool_t app_ref, hid_t vipl_id)
     /* Copy the class structure so the caller can reuse or free it */
     if (NULL == (saved = H5FL_CALLOC(H5VL_class_t)))
         HGOTO_ERROR(H5E_VOL, H5E_CANTALLOC, H5I_INVALID_HID, "memory allocation failed for VOL connector class struct")
-    HDmemcpy(saved, cls, sizeof(H5VL_class_t));
+    H5MM_memcpy(saved, cls, sizeof(H5VL_class_t));
     if(NULL == (saved->name = H5MM_strdup(cls->name)))
         HGOTO_ERROR(H5E_VOL, H5E_CANTALLOC, H5I_INVALID_HID, "memory allocation failed for VOL connector name")
 
diff --git a/src/H5VM.c b/src/H5VM.c
index 452d378..3e57ce8 100644
--- a/src/H5VM.c
+++ b/src/H5VM.c
@@ -732,7 +732,7 @@ H5VM_stride_copy(unsigned n, hsize_t elmt_size, const hsize_t *size,
 
             /* Copy an element */
             H5_CHECK_OVERFLOW(elmt_size,hsize_t,size_t);
-            HDmemcpy(dst, src, (size_t)elmt_size); /*lint !e671 The elmt_size will be OK */
+            H5MM_memcpy(dst, src, (size_t)elmt_size); /*lint !e671 The elmt_size will be OK */
 
             /* Decrement indices and advance pointers */
             for (j=(int)(n-1), carry=TRUE; j>=0 && carry; --j) {
@@ -749,7 +749,7 @@ H5VM_stride_copy(unsigned n, hsize_t elmt_size, const hsize_t *size,
         }
     } else {
         H5_CHECK_OVERFLOW(elmt_size,hsize_t,size_t);
-        HDmemcpy (dst, src, (size_t)elmt_size); /*lint !e671 The elmt_size will be OK */
+        H5MM_memcpy (dst, src, (size_t)elmt_size); /*lint !e671 The elmt_size will be OK */
     }
 
     FUNC_LEAVE_NOAPI(SUCCEED)
@@ -801,7 +801,7 @@ H5VM_stride_copy_s(unsigned n, hsize_t elmt_size, const hsize_t *size,
 
             /* Copy an element */
             H5_CHECK_OVERFLOW(elmt_size,hsize_t,size_t);
-            HDmemcpy(dst, src, (size_t)elmt_size); /*lint !e671 The elmt_size will be OK */
+            H5MM_memcpy(dst, src, (size_t)elmt_size); /*lint !e671 The elmt_size will be OK */
 
             /* Decrement indices and advance pointers */
             for (j=(int)(n-1), carry=TRUE; j>=0 && carry; --j) {
@@ -818,7 +818,7 @@ H5VM_stride_copy_s(unsigned n, hsize_t elmt_size, const hsize_t *size,
         }
     } else {
         H5_CHECK_OVERFLOW(elmt_size,hsize_t,size_t);
-        HDmemcpy (dst, src, (size_t)elmt_size); /*lint !e671 The elmt_size will be OK */
+        H5MM_memcpy (dst, src, (size_t)elmt_size); /*lint !e671 The elmt_size will be OK */
     }
 
     FUNC_LEAVE_NOAPI(SUCCEED)
@@ -877,7 +877,7 @@ H5VM_stride_copy2(hsize_t nelmts, hsize_t elmt_size,
 
 	/* Copy an element */
         H5_CHECK_OVERFLOW(elmt_size,hsize_t,size_t);
-	HDmemcpy(dst, src, (size_t)elmt_size); /*lint !e671 The elmt_size will be OK */
+	H5MM_memcpy(dst, src, (size_t)elmt_size); /*lint !e671 The elmt_size will be OK */
 
 	/* Decrement indices and advance pointers */
 	for (j=(int)(dst_n-1), carry=TRUE; j>=0 && carry; --j) {
@@ -936,7 +936,7 @@ H5VM_array_fill(void *_dst, const void *src, size_t size, size_t count)
     HDassert(size < SIZET_MAX && size > 0);
     HDassert(count < SIZET_MAX && count > 0);
 
-    HDmemcpy(dst, src, size);   /* copy first item */
+    H5MM_memcpy(dst, src, size);   /* copy first item */
 
     /* Initialize counters, etc. while compensating for first element copied */
     copy_size = size;
@@ -947,7 +947,7 @@ H5VM_array_fill(void *_dst, const void *src, size_t size, size_t count)
     /* copy until we've copied at least half of the items */
     while (items_left >= copy_items)
     {
-        HDmemcpy(dst, _dst, copy_size);   /* copy the current chunk */
+        H5MM_memcpy(dst, _dst, copy_size);   /* copy the current chunk */
         dst += copy_size;     /* move the offset for the next chunk */
         items_left -= copy_items;   /* decrement the number of items left */
 
@@ -955,7 +955,7 @@ H5VM_array_fill(void *_dst, const void *src, size_t size, size_t count)
         copy_items *= 2;    /* increase the count of items we are copying */
     }   /* end while */
     if (items_left > 0)   /* if there are any items left to copy */
-        HDmemcpy(dst, _dst, items_left * size);
+        H5MM_memcpy(dst, _dst, items_left * size);
 
     FUNC_LEAVE_NOAPI(SUCCEED)
 }   /* H5VM_array_fill() */
@@ -1623,7 +1623,7 @@ src_smaller:
         acc_len = 0;
         do {
             /* Copy data */
-            HDmemcpy(dst, src, tmp_src_len);
+            H5MM_memcpy(dst, src, tmp_src_len);
 
             /* Accumulate number of bytes copied */
             acc_len += tmp_src_len;
@@ -1666,7 +1666,7 @@ dst_smaller:
         acc_len = 0;
         do {
             /* Copy data */
-            HDmemcpy(dst, src, tmp_dst_len);
+            H5MM_memcpy(dst, src, tmp_dst_len);
 
             /* Accumulate number of bytes copied */
             acc_len += tmp_dst_len;
@@ -1709,7 +1709,7 @@ equal:
         acc_len = 0;
         do {
             /* Copy data */
-            HDmemcpy(dst, src, tmp_dst_len);
+            H5MM_memcpy(dst, src, tmp_dst_len);
 
             /* Accumulate number of bytes copied */
             acc_len += tmp_dst_len;
diff --git a/src/H5VMprivate.h b/src/H5VMprivate.h
index decac7e..28248c0 100644
--- a/src/H5VMprivate.h
+++ b/src/H5VMprivate.h
@@ -41,7 +41,7 @@ typedef herr_t (*H5VM_opvv_func_t)(hsize_t dst_off, hsize_t src_off,
 /* Other functions */
 #define H5VM_vector_cpy(N,DST,SRC) {                                           \
     HDassert(sizeof(*(DST))==sizeof(*(SRC)));				                  \
-    if (SRC) HDmemcpy (DST, SRC, (N)*sizeof(*(DST)));                         \
+    if (SRC) H5MM_memcpy (DST, SRC, (N)*sizeof(*(DST)));                         \
     else HDmemset (DST, 0, (N)*sizeof(*(DST)));                               \
 }
 
diff --git a/src/H5Z.c b/src/H5Z.c
index 0e2a7ba..b703958 100644
--- a/src/H5Z.c
+++ b/src/H5Z.c
@@ -322,7 +322,7 @@ H5Z_register (const H5Z_class2_t *cls)
 
         /* Initialize */
         i = H5Z_table_used_g++;
-        HDmemcpy(H5Z_table_g+i, cls, sizeof(H5Z_class2_t));
+        H5MM_memcpy(H5Z_table_g+i, cls, sizeof(H5Z_class2_t));
 #ifdef H5Z_DEBUG
         HDmemset(H5Z_stat_table_g+i, 0, sizeof(H5Z_stats_t));
 #endif /* H5Z_DEBUG */
@@ -330,7 +330,7 @@ H5Z_register (const H5Z_class2_t *cls)
     /* Filter already registered */
     else {
         /* Replace old contents */
-        HDmemcpy(H5Z_table_g+i, cls, sizeof(H5Z_class2_t));
+        H5MM_memcpy(H5Z_table_g+i, cls, sizeof(H5Z_class2_t));
     } /* end else */
 
 done:
diff --git a/src/H5Zfletcher32.c b/src/H5Zfletcher32.c
index 4cd77ef..4d75d14 100644
--- a/src/H5Zfletcher32.c
+++ b/src/H5Zfletcher32.c
@@ -108,7 +108,7 @@ H5Z_filter_fletcher32 (unsigned flags, size_t H5_ATTR_UNUSED cd_nelmts, const un
              * system.  We'll check both the correct checksum and the wrong
              * checksum to be consistent with Release 1.6.2 and before.
              */
-            HDmemcpy(c, &fletcher, (size_t)4);
+            H5MM_memcpy(c, &fletcher, (size_t)4);
 
             tmp  = c[1];
             c[1] = c[0];
@@ -118,7 +118,7 @@ H5Z_filter_fletcher32 (unsigned flags, size_t H5_ATTR_UNUSED cd_nelmts, const un
             c[3] = c[2];
             c[2] = tmp;
 
-            HDmemcpy(&reversed_fletcher, c, (size_t)4);
+            H5MM_memcpy(&reversed_fletcher, c, (size_t)4);
 
             /* Verify computed checksum matches stored checksum */
             if(stored_fletcher != fletcher && stored_fletcher != reversed_fletcher)
@@ -140,7 +140,7 @@ H5Z_filter_fletcher32 (unsigned flags, size_t H5_ATTR_UNUSED cd_nelmts, const un
         dst = (unsigned char *) outbuf;
 
         /* Copy raw data */
-        HDmemcpy((void*)dst, (void*)(*buf), nbytes);
+        H5MM_memcpy((void*)dst, (void*)(*buf), nbytes);
 
         /* Append checksum to raw data for storage */
         dst += nbytes;
diff --git a/src/H5Zscaleoffset.c b/src/H5Zscaleoffset.c
index 0026749..d3e8fc0 100644
--- a/src/H5Zscaleoffset.c
+++ b/src/H5Zscaleoffset.c
@@ -141,7 +141,7 @@ H5Z_class2_t H5Z_SCALEOFFSET[1] = {{
             } /* end if */                                                       \
                                                                                  \
             /* Copy the value */                                                 \
-            HDmemcpy(&_cd_value, _fv_p, _copy_size);                             \
+            H5MM_memcpy(&_cd_value, _fv_p, _copy_size);                             \
             (cd_values)[_i] = (unsigned)_cd_value;                               \
                                                                                  \
             /* Next field */                                                     \
@@ -158,7 +158,7 @@ H5Z_class2_t H5Z_SCALEOFFSET[1] = {{
         _fv_p = ((char *)&(fill_val)) + sizeof(type) - MIN(4, _size_rem);        \
         while(_size_rem >= 4) {                                                  \
             /* Copy the value */                                                 \
-            HDmemcpy(&_cd_value, _fv_p, _copy_size);                             \
+            H5MM_memcpy(&_cd_value, _fv_p, _copy_size);                             \
             (cd_values)[_i] = (unsigned)_cd_value;                               \
                                                                                  \
             /* Next field */                                                     \
@@ -176,7 +176,7 @@ H5Z_class2_t H5Z_SCALEOFFSET[1] = {{
              * _cd_value as it will not be fully overwritten and copy to the end \
              * of _cd value as it is BE. */                                      \
             _cd_value = (uint32_t)0;                                             \
-            HDmemcpy((char *)&_cd_value + 4 - _size_rem, _fv_p, _size_rem);      \
+            H5MM_memcpy((char *)&_cd_value + 4 - _size_rem, _fv_p, _size_rem);      \
             (cd_values)[_i] = (unsigned)_cd_value;                               \
         } /* end if */                                                           \
     } /* end else */                                                             \
@@ -269,7 +269,7 @@ H5Z_class2_t H5Z_SCALEOFFSET[1] = {{
                                                                                  \
             /* Copy the value */                                                 \
             _cd_value = (uint32_t)(cd_values)[_i];                               \
-            HDmemcpy(_fv_p, &_cd_value, _copy_size);                             \
+            H5MM_memcpy(_fv_p, &_cd_value, _copy_size);                             \
                                                                                  \
             /* Next field */                                                     \
             _i++;                                                                \
@@ -286,7 +286,7 @@ H5Z_class2_t H5Z_SCALEOFFSET[1] = {{
         while(_size_rem >= 4) {                                                  \
             /* Copy the value */                                                 \
             _cd_value = (uint32_t)(cd_values)[_i];                               \
-            HDmemcpy(_fv_p, &_cd_value, _copy_size);                             \
+            H5MM_memcpy(_fv_p, &_cd_value, _copy_size);                             \
                                                                                  \
             /* Next field */                                                     \
             _i++;                                                                \
@@ -303,7 +303,7 @@ H5Z_class2_t H5Z_SCALEOFFSET[1] = {{
              * _cd_value as it will not be fully overwritten and copy to the end \
              * of _cd value as it is BE. */                                      \
             _cd_value = (uint32_t)(cd_values)[_i];                               \
-            HDmemcpy(_fv_p, (char *)&_cd_value + 4 - _size_rem, _size_rem);      \
+            H5MM_memcpy(_fv_p, (char *)&_cd_value + 4 - _size_rem, _size_rem);      \
         } /* end if */                                                           \
     } /* end else */                                                             \
 }
@@ -529,10 +529,10 @@ H5Z_class2_t H5Z_SCALEOFFSET[1] = {{
          * account for offset in BE if sizes differ                                   \
          */                                                                           \
         if(H5T_native_order_g == H5T_ORDER_LE)                                        \
-            HDmemcpy(minval, &min, sizeof(type));                                     \
+            H5MM_memcpy(minval, &min, sizeof(type));                                     \
         else {                                                                        \
             HDassert(H5T_native_order_g == H5T_ORDER_BE);                             \
-            HDmemcpy(((char *)minval) + (sizeof(long long) - sizeof(type)),           \
+            H5MM_memcpy(((char *)minval) + (sizeof(long long) - sizeof(type)),           \
                     &min, sizeof(type));                                              \
         } /* end else */                                                              \
     else                                                                              \
@@ -604,10 +604,10 @@ H5Z_class2_t H5Z_SCALEOFFSET[1] = {{
          * account for offset in BE if sizes differ                                \
          */                                                                        \
         if(H5T_native_order_g == H5T_ORDER_LE)                                     \
-            HDmemcpy(&min, &minval, sizeof(type));                                 \
+            H5MM_memcpy(&min, &minval, sizeof(type));                                 \
         else {                                                                     \
             HDassert(H5T_native_order_g == H5T_ORDER_BE);                          \
-            HDmemcpy(&min, ((char *)&minval) + (sizeof(long long)                  \
+            H5MM_memcpy(&min, ((char *)&minval) + (sizeof(long long)                  \
                     - sizeof(type)), sizeof(type));                                \
         } /* end else */                                                           \
     else                                                                           \
@@ -1173,7 +1173,7 @@ H5Z_filter_scaleoffset(unsigned flags, size_t cd_nelmts, const unsigned cd_value
 
         /* special case: minbits equal to full precision */
         if(minbits == p.size * 8) {
-            HDmemcpy(outbuf, (unsigned char*)(*buf)+buf_offset, size_out);
+            H5MM_memcpy(outbuf, (unsigned char*)(*buf)+buf_offset, size_out);
             /* free the original buffer */
             H5MM_xfree(*buf);
 
@@ -1273,7 +1273,7 @@ H5Z_filter_scaleoffset(unsigned flags, size_t cd_nelmts, const unsigned cd_value
 
         /* special case: minbits equal to full precision */
         if(minbits == p.size * 8) {
-            HDmemcpy(outbuf + buf_offset, *buf, nbytes);
+            H5MM_memcpy(outbuf + buf_offset, *buf, nbytes);
             /* free the original buffer */
             H5MM_xfree(*buf);
 
diff --git a/src/H5Zshuffle.c b/src/H5Zshuffle.c
index 1fef1c1..e70ef33 100644
--- a/src/H5Zshuffle.c
+++ b/src/H5Zshuffle.c
@@ -210,7 +210,7 @@ H5Z_filter_shuffle(unsigned flags, size_t cd_nelmts, const unsigned cd_values[],
             if(leftover>0) {
                 /* Adjust back to end of shuffled bytes */
                 _dest -= (bytesoftype - 1);     /*lint !e794 _dest is initialized */
-                HDmemcpy((void*)_dest, (void*)_src, leftover);
+                H5MM_memcpy((void*)_dest, (void*)_src, leftover);
             }
         } /* end if */
         else {
@@ -268,7 +268,7 @@ H5Z_filter_shuffle(unsigned flags, size_t cd_nelmts, const unsigned cd_values[],
             if(leftover>0) {
                 /* Adjust back to end of shuffled bytes */
                 _src -= (bytesoftype - 1);      /*lint !e794 _src is initialized */
-                HDmemcpy((void*)_dest, (void*)_src, leftover);
+                H5MM_memcpy((void*)_dest, (void*)_src, leftover);
             }
         } /* end else */
 
diff --git a/src/H5Ztrans.c b/src/H5Ztrans.c
index f8fc325..6d07513 100644
--- a/src/H5Ztrans.c
+++ b/src/H5Ztrans.c
@@ -1078,7 +1078,7 @@ H5Z_xform_eval(H5Z_data_xform_t *data_xform_prop, void* array, size_t array_size
 		if(NULL == (data_xform_prop->dat_val_pointers->ptr_dat_val[i] = (void*)H5MM_malloc(array_size * H5T_get_size((H5T_t *)H5I_object(array_type)))))
 		    HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "Ran out of memory trying to allocate space for data in data transform")
 
-                HDmemcpy(data_xform_prop->dat_val_pointers->ptr_dat_val[i], array, array_size * H5T_get_size((H5T_t *)H5I_object(array_type)));
+                H5MM_memcpy(data_xform_prop->dat_val_pointers->ptr_dat_val[i], array, array_size * H5T_get_size((H5T_t *)H5I_object(array_type)));
 	    } /* end for */
 	} /* end else */
 
@@ -1086,7 +1086,7 @@ H5Z_xform_eval(H5Z_data_xform_t *data_xform_prop, void* array, size_t array_size
 	    HGOTO_ERROR(H5E_ARGS, H5E_BADVALUE, FAIL, "error while performing data transform")
 
 	if(data_xform_prop->dat_val_pointers->num_ptrs > 1)
-	    HDmemcpy(array, res.value.dat_val, array_size * H5T_get_size((H5T_t *)H5I_object(array_type)));
+	    H5MM_memcpy(array, res.value.dat_val, array_size * H5T_get_size((H5T_t *)H5I_object(array_type)));
 
         /* Free the temporary arrays we used */
         if(data_xform_prop->dat_val_pointers->num_ptrs > 1)