[svn-r27549] Description:

    Update the file format debugging routines to match the recent changes to
the metadata cache, along with a few other cleanups and miscellaneous
enhancements.

Tested on:
    MacOSX/64 10.10.5 (amazon)
    (h5committest forthcoming)

19 files changed, 392 insertions, 300 deletions

diff --git a/src/H5Abtree2.c b/src/H5Abtree2.c
index b85bee3..5e29d3f 100644
--- a/src/H5Abtree2.c
+++ b/src/H5Abtree2.c
@@ -85,8 +85,7 @@ static herr_t H5A__dense_btree2_corder_encode(uint8_t *raw, const void *native,
     void *ctx);
 static herr_t H5A__dense_btree2_corder_decode(const uint8_t *raw, void *native,
     void *ctx);
-static herr_t H5A__dense_btree2_corder_debug(FILE *stream, const H5F_t *f, hid_t dxpl_id,
-    int indent, int fwidth, const void *record, const void *_udata);
+static herr_t H5A__dense_btree2_corder_debug(FILE *stream, int indent, int fwidth, const void *record);
 
 /* v2 B-tree driver callbacks for 'name' index */
 static herr_t H5A__dense_btree2_name_store(void *native, const void *udata);
@@ -95,8 +94,7 @@ static herr_t H5A__dense_btree2_name_encode(uint8_t *raw, const void *native,
     void *ctx);
 static herr_t H5A__dense_btree2_name_decode(const uint8_t *raw, void *native,
     void *ctx);
-static herr_t H5A__dense_btree2_name_debug(FILE *stream, const H5F_t *f, hid_t dxpl_id,
-    int indent, int fwidth, const void *record, const void *_udata);
+static herr_t H5A__dense_btree2_name_debug(FILE *stream, int indent, int fwidth, const void *record);
 
 /* Fractal heap function callbacks */
 static herr_t H5A__dense_fh_name_cmp(const void *obj, size_t obj_len, void *op_data);
@@ -116,9 +114,7 @@ const H5B2_class_t H5A_BT2_NAME[1]={{  /* B-tree class information */
     H5A__dense_btree2_name_compare,     /* Record comparison callback */
     H5A__dense_btree2_name_encode,      /* Record encoding callback */
     H5A__dense_btree2_name_decode,      /* Record decoding callback */
-    H5A__dense_btree2_name_debug,       /* Record debugging callback */
-    NULL,                              /* Create debugging context */
-    NULL                               /* Destroy debugging context */
+    H5A__dense_btree2_name_debug        /* Record debugging callback */
 }};
 
 /* v2 B-tree class for indexing 'creation order' field of attributes */
@@ -132,9 +128,7 @@ const H5B2_class_t H5A_BT2_CORDER[1]={{ /* B-tree class information */
     H5A__dense_btree2_corder_compare,   /* Record comparison callback */
     H5A__dense_btree2_corder_encode,    /* Record encoding callback */
     H5A__dense_btree2_corder_decode,    /* Record decoding callback */
-    H5A__dense_btree2_corder_debug,     /* Record debugging callback */
-    NULL,                              /* Create debugging context */
-    NULL                               /* Destroy debugging context */
+    H5A__dense_btree2_corder_debug      /* Record debugging callback */
 }};
 
 
@@ -381,8 +375,7 @@ H5A__dense_btree2_name_decode(const uint8_t *raw, void *_nrecord, void H5_ATTR_U
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5A__dense_btree2_name_debug(FILE *stream, const H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id,
-    int indent, int fwidth, const void *_nrecord, const void H5_ATTR_UNUSED *_udata)
+H5A__dense_btree2_name_debug(FILE *stream, int indent, int fwidth, const void *_nrecord)
 {
     const H5A_dense_bt2_name_rec_t *nrecord = (const H5A_dense_bt2_name_rec_t *)_nrecord;
 
@@ -539,8 +532,7 @@ H5A__dense_btree2_corder_decode(const uint8_t *raw, void *_nrecord, void H5_ATTR
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5A__dense_btree2_corder_debug(FILE *stream, const H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id,
-    int indent, int fwidth, const void *_nrecord, const void H5_ATTR_UNUSED *_udata)
+H5A__dense_btree2_corder_debug(FILE *stream, int indent, int fwidth, const void *_nrecord)
 {
     const H5A_dense_bt2_corder_rec_t *nrecord = (const H5A_dense_bt2_corder_rec_t *)_nrecord;
 
diff --git a/src/H5B2dbg.c b/src/H5B2dbg.c
index 6e1250b..d3b5014 100644
--- a/src/H5B2dbg.c
+++ b/src/H5B2dbg.c
@@ -91,7 +91,6 @@ H5B2__hdr_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
     const H5B2_class_t *type, haddr_t obj_addr)
 {
     H5B2_hdr_t	*hdr = NULL;            /* B-tree header info */
-    void        *dbg_ctx = NULL;	/* v2 B-tree debugging context */
     unsigned    u;                      /* Local index variable */
     char        temp_str[128];          /* Temporary string, for formatting */
     H5B2_hdr_cache_ud_t cache_udata;    /* User-data for callback */
@@ -109,22 +108,13 @@ H5B2__hdr_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
     HDassert(indent >= 0);
     HDassert(fwidth >= 0);
     HDassert(type);
-    HDassert((type->crt_dbg_ctx && type->dst_dbg_ctx) ||
-        (NULL == type->crt_dbg_ctx && NULL == type->dst_dbg_ctx));
-
-    /* Check for debugging context callback available */
-    if(type->crt_dbg_ctx) {
-        /* Create debugging context */
-        if(NULL == (dbg_ctx = (type->crt_dbg_ctx)(f, dxpl_id, obj_addr)))
-	    HGOTO_ERROR(H5E_BTREE, H5E_CANTGET, FAIL, "unable to create v2 B-tree debugging context")
-    } /* end if */
 
     /*
      * Load the B-tree header.
      */
     cache_udata.f = f;
     cache_udata.addr = addr;
-    cache_udata.ctx_udata = dbg_ctx;
+    cache_udata.ctx_udata = f;
     if(NULL == (hdr = (H5B2_hdr_t *)H5AC_protect(f, dxpl_id, H5AC_BT2_HDR, addr, &cache_udata, H5AC__READ_ONLY_FLAG)))
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, FAIL, "unable to load B-tree header")
 
@@ -139,12 +129,12 @@ H5B2__hdr_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
      */
     HDfprintf(stream, "%*s%-*s %s (%u)\n", indent, "", fwidth,
 	      "Tree type ID:", hdr->cls->name, (unsigned)hdr->cls->id);
-    HDfprintf(stream, "%*s%-*s %Zu\n", indent, "", fwidth,
+    HDfprintf(stream, "%*s%-*s %u\n", indent, "", fwidth,
 	      "Size of node:",
-	      hdr->node_size);
-    HDfprintf(stream, "%*s%-*s %Zu\n", indent, "", fwidth,
+	      (unsigned)hdr->node_size);
+    HDfprintf(stream, "%*s%-*s %u\n", indent, "", fwidth,
 	      "Size of raw (disk) record:",
-	      hdr->rrec_size);
+	      (unsigned)hdr->rrec_size);
     HDfprintf(stream, "%*s%-*s %s\n", indent, "", fwidth,
 	      "Dirty flag:",
 	      hdr->cache_info.is_dirty ? "True" : "False");
@@ -177,8 +167,6 @@ H5B2__hdr_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
     } /* end for */
 
 done:
-    if(dbg_ctx && (type->dst_dbg_ctx)(dbg_ctx) < 0)
-        HDONE_ERROR(H5E_BTREE, H5E_CANTRELEASE, FAIL, "unable to release v2 B-tree debugging context")
     if(hdr) {
         hdr->f = NULL;
         if(H5AC_unprotect(f, dxpl_id, H5AC_BT2_HDR, addr, hdr, H5AC__NO_FLAGS_SET) < 0)
@@ -208,7 +196,6 @@ H5B2__int_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
 {
     H5B2_hdr_t	*hdr = NULL;            /* B-tree header */
     H5B2_internal_t	*internal = NULL;   /* B-tree internal node */
-    void        *dbg_ctx = NULL;	/* v2 B-tree debugging context */
     unsigned	u;                      /* Local index variable */
     char        temp_str[128];          /* Temporary string, for formatting */
     H5B2_hdr_cache_ud_t cache_udata;    /* User-data for callback */
@@ -225,25 +212,16 @@ H5B2__int_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
     HDassert(indent >= 0);
     HDassert(fwidth >= 0);
     HDassert(type);
-    HDassert((type->crt_dbg_ctx && type->dst_dbg_ctx) ||
-        (NULL == type->crt_dbg_ctx && NULL == type->dst_dbg_ctx));
     HDassert(H5F_addr_defined(hdr_addr));
     HDassert(H5F_addr_defined(obj_addr));
     HDassert(nrec > 0);
 
-    /* Check for debugging context callback available */
-    if(type->crt_dbg_ctx) {
-        /* Create debugging context */
-        if(NULL == (dbg_ctx = (type->crt_dbg_ctx)(f, dxpl_id, obj_addr)))
-	    HGOTO_ERROR(H5E_BTREE, H5E_CANTGET, FAIL, "unable to create v2 B-tree debugging context")
-    } /* end if */
-
     /*
      * Load the B-tree header.
      */
     cache_udata.f = f;
     cache_udata.addr = hdr_addr;
-    cache_udata.ctx_udata = dbg_ctx;
+    cache_udata.ctx_udata = f;
     if(NULL == (hdr = (H5B2_hdr_t *)H5AC_protect(f, dxpl_id, H5AC_BT2_HDR, hdr_addr, &cache_udata, H5AC__READ_ONLY_FLAG)))
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, FAIL, "unable to load B-tree header")
 
@@ -259,22 +237,19 @@ H5B2__int_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTLOAD, FAIL, "unable to load B-tree internal node")
 
     /* Print opening message */
-    if(internal->depth == 1)
-        HDfprintf(stream, "%*sv2 B-tree Internal 'Leaf' Node...\n", indent, "");
-    else
-        HDfprintf(stream, "%*sv2 B-tree Internal 'Branch' Node...\n", indent, "");
+    HDfprintf(stream, "%*sv2 B-tree Internal Node...\n", indent, "");
 
     /*
      * Print the values.
      */
     HDfprintf(stream, "%*s%-*s %s (%u)\n", indent, "", fwidth,
 	      "Tree type ID:", hdr->cls->name, (unsigned)hdr->cls->id);
-    HDfprintf(stream, "%*s%-*s %Zu\n", indent, "", fwidth,
+    HDfprintf(stream, "%*s%-*s %u\n", indent, "", fwidth,
 	      "Size of node:",
-	      hdr->node_size);
-    HDfprintf(stream, "%*s%-*s %Zu\n", indent, "", fwidth,
+	      (unsigned)hdr->node_size);
+    HDfprintf(stream, "%*s%-*s %u\n", indent, "", fwidth,
 	      "Size of raw (disk) record:",
-	      hdr->rrec_size);
+	      (unsigned)hdr->rrec_size);
     HDfprintf(stream, "%*s%-*s %s\n", indent, "", fwidth,
 	      "Dirty flag:",
 	      internal->cache_info.is_dirty ? "True" : "False");
@@ -297,8 +272,8 @@ H5B2__int_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
         HDfprintf(stream, "%*s%-*s\n", indent + 3, "", MAX(0, fwidth - 3),
                   temp_str);
         HDassert(H5B2_INT_NREC(internal, hdr, u));
-        (void)(type->debug)(stream, f, dxpl_id, indent + 6, MAX (0, fwidth-6),
-            H5B2_INT_NREC(internal, hdr, u), dbg_ctx);
+        (void)(type->debug)(stream, indent + 6, MAX (0, fwidth-6),
+            H5B2_INT_NREC(internal, hdr, u));
     } /* end for */
 
     /* Print final node pointer */
@@ -310,8 +285,6 @@ H5B2__int_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent,
               internal->node_ptrs[u].addr);
 
 done:
-    if(dbg_ctx && (type->dst_dbg_ctx)(dbg_ctx) < 0)
-        HDONE_ERROR(H5E_BTREE, H5E_CANTRELEASE, FAIL, "unable to release v2 B-tree debugging context")
     if(hdr) {
         hdr->f = NULL;
         if(H5AC_unprotect(f, dxpl_id, H5AC_BT2_HDR, hdr_addr, hdr, H5AC__NO_FLAGS_SET) < 0)
@@ -344,7 +317,6 @@ H5B2__leaf_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent
     H5B2_hdr_t	*hdr = NULL;            /* B-tree header */
     H5B2_leaf_t	*leaf = NULL;           /* B-tree leaf node */
     H5B2_hdr_cache_ud_t cache_udata;    /* User-data for callback */
-    void        *dbg_ctx = NULL;	/* v2 B-tree debugging context */
     unsigned	u;                      /* Local index variable */
     char        temp_str[128];          /* Temporary string, for formatting */
     herr_t      ret_value = SUCCEED;    /* Return value */
@@ -360,25 +332,16 @@ H5B2__leaf_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent
     HDassert(indent >= 0);
     HDassert(fwidth >= 0);
     HDassert(type);
-    HDassert((type->crt_dbg_ctx && type->dst_dbg_ctx) ||
-        (NULL == type->crt_dbg_ctx && NULL == type->dst_dbg_ctx));
     HDassert(H5F_addr_defined(hdr_addr));
     HDassert(H5F_addr_defined(obj_addr));
     HDassert(nrec > 0);
 
-    /* Check for debugging context callback available */
-    if(type->crt_dbg_ctx) {
-        /* Create debugging context */
-        if(NULL == (dbg_ctx = (type->crt_dbg_ctx)(f, dxpl_id, obj_addr)))
-	    HGOTO_ERROR(H5E_BTREE, H5E_CANTGET, FAIL, "unable to create v2 B-tree debugging context")
-    } /* end if */
-
     /*
      * Load the B-tree header.
      */
     cache_udata.f = f;
     cache_udata.addr = hdr_addr;
-    cache_udata.ctx_udata = dbg_ctx;
+    cache_udata.ctx_udata = f;
     if(NULL == (hdr = (H5B2_hdr_t *)H5AC_protect(f, dxpl_id, H5AC_BT2_HDR, hdr_addr, &cache_udata, H5AC__READ_ONLY_FLAG)))
 	HGOTO_ERROR(H5E_BTREE, H5E_CANTPROTECT, FAIL, "unable to protect B-tree header")
 
@@ -400,12 +363,12 @@ H5B2__leaf_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent
      */
     HDfprintf(stream, "%*s%-*s %s (%u)\n", indent, "", fwidth,
 	      "Tree type ID:", hdr->cls->name, (unsigned)hdr->cls->id);
-    HDfprintf(stream, "%*s%-*s %Zu\n", indent, "", fwidth,
+    HDfprintf(stream, "%*s%-*s %u\n", indent, "", fwidth,
 	      "Size of node:",
-	      hdr->node_size);
-    HDfprintf(stream, "%*s%-*s %Zu\n", indent, "", fwidth,
+	      (unsigned)hdr->node_size);
+    HDfprintf(stream, "%*s%-*s %u\n", indent, "", fwidth,
 	      "Size of raw (disk) record:",
-	      hdr->rrec_size);
+	      (unsigned)hdr->rrec_size);
     HDfprintf(stream, "%*s%-*s %s\n", indent, "", fwidth,
 	      "Dirty flag:",
 	      leaf->cache_info.is_dirty ? "True" : "False");
@@ -420,13 +383,11 @@ H5B2__leaf_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr, FILE *stream, int indent
         HDfprintf(stream, "%*s%-*s\n", indent + 3, "", MAX(0, fwidth - 3),
                   temp_str);
         HDassert(H5B2_LEAF_NREC(leaf, hdr, u));
-        (void)(type->debug)(stream, f, dxpl_id, indent + 6, MAX (0, fwidth-6),
-            H5B2_LEAF_NREC(leaf, hdr, u), dbg_ctx);
+        (void)(type->debug)(stream, indent + 6, MAX (0, fwidth-6),
+            H5B2_LEAF_NREC(leaf, hdr, u));
     } /* end for */
 
 done:
-    if(dbg_ctx && (type->dst_dbg_ctx)(dbg_ctx) < 0)
-        HDONE_ERROR(H5E_BTREE, H5E_CANTRELEASE, FAIL, "unable to release v2 B-tree debugging context")
     if(hdr) {
         hdr->f = NULL;
         if(H5AC_unprotect(f, dxpl_id, H5AC_BT2_HDR, hdr_addr, hdr, H5AC__NO_FLAGS_SET) < 0)
diff --git a/src/H5B2private.h b/src/H5B2private.h
index 08d3ce1..45b6737 100644
--- a/src/H5B2private.h
+++ b/src/H5B2private.h
@@ -92,10 +92,8 @@ struct H5B2_class_t {
     herr_t (*compare)(const void *rec1, const void *rec2); 		/* Compare two native records */
     herr_t (*encode)(uint8_t *raw, const void *record, void *ctx);  	/* Encode record from native form to disk storage form */
     herr_t (*decode)(const uint8_t *raw, void *record, void *ctx);  	/* Decode record from disk storage form to native form */
-    herr_t (*debug)(FILE *stream, const H5F_t *f, hid_t dxpl_id,    	/* Print a record for debugging */
-        int indent, int fwidth, const void *record, const void *ctx);
-    void *(*crt_dbg_ctx)(H5F_t *f, hid_t dxpl_id, haddr_t obj_addr); 	/* Create debugging context */
-    herr_t (*dst_dbg_ctx)(void *dbg_ctx);       /* Destroy debugging context */
+    herr_t (*debug)(FILE *stream, int indent, int fwidth,    	/* Print a record for debugging */
+        const void *record);
 };
 
 /* v2 B-tree creation parameters */
diff --git a/src/H5B2test.c b/src/H5B2test.c
index 35771f2..31cf8e1 100644
--- a/src/H5B2test.c
+++ b/src/H5B2test.c
@@ -67,9 +67,7 @@ static herr_t H5B2__test_store(void *nrecord, const void *udata);
 static herr_t H5B2__test_compare(const void *rec1, const void *rec2);
 static herr_t H5B2__test_encode(uint8_t *raw, const void *nrecord, void *ctx);
 static herr_t H5B2__test_decode(const uint8_t *raw, void *nrecord, void *ctx);
-static herr_t H5B2__test_debug(FILE *stream, const H5F_t *f, hid_t dxpl_id,
-    int indent, int fwidth, const void *record, const void *_udata);
-static void *H5B2__test_crt_dbg_context(H5F_t *f, hid_t dxpl_id, haddr_t addr);
+static herr_t H5B2__test_debug(FILE *stream, int indent, int fwidth, const void *record);
 
 
 /*********************/
@@ -86,9 +84,7 @@ const H5B2_class_t H5B2_TEST[1]={{   /* B-tree class information */
     H5B2__test_compare,          /* Record comparison callback */
     H5B2__test_encode,           /* Record encoding callback */
     H5B2__test_decode,           /* Record decoding callback */
-    H5B2__test_debug,            /* Record debugging callback */
-    H5B2__test_crt_dbg_context,  /* Create debugging context */
-    H5B2__test_dst_context       /* Destroy debugging context */
+    H5B2__test_debug             /* Record debugging callback */
 }};
 
 
@@ -295,13 +291,11 @@ H5B2__test_decode(const uint8_t *raw, void *nrecord, void *_ctx)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5B2__test_debug(FILE *stream, const H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id,
-    int indent, int fwidth, const void *record,
-    const void H5_ATTR_UNUSED *_udata)
+H5B2__test_debug(FILE *stream, int indent, int fwidth, const void *record)
 {
     FUNC_ENTER_STATIC_NOERR
 
-    HDassert (record);
+    HDassert(record);
 
     HDfprintf(stream, "%*s%-*s %Hu\n", indent, "", fwidth, "Record:",
         *(const hsize_t *)record);
@@ -311,45 +305,6 @@ H5B2__test_debug(FILE *stream, const H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUS
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5B2__test_crt_dbg_context
- *
- * Purpose:	Create context for debugging callback
- *
- * Return:	Success:	non-NULL
- *		Failure:	NULL
- *
- * Programmer:	Quincey Koziol
- *              Tuesday, December 1, 2009
- *
- *-------------------------------------------------------------------------
- */
-static void *
-H5B2__test_crt_dbg_context(H5F_t *f, hid_t H5_ATTR_UNUSED dxpl_id, haddr_t H5_ATTR_UNUSED addr)
-{
-    H5B2_test_ctx_t *ctx;       /* Callback context structure */
-    void *ret_value;            /* Return value */
-
-    FUNC_ENTER_STATIC
-
-    /* Sanity check */
-    HDassert(f);
-
-    /* Allocate callback context */
-    if(NULL == (ctx = H5FL_MALLOC(H5B2_test_ctx_t)))
-        HGOTO_ERROR(H5E_BTREE, H5E_CANTALLOC, NULL, "can't allocate callback context")
-
-    /* Determine the size of addresses & lengths in the file */
-    ctx->sizeof_size = H5F_SIZEOF_SIZE(f);
-
-    /* Set return value */
-    ret_value = ctx;
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* H5B2__test_crt_dbg_context() */
-
-
-/*-------------------------------------------------------------------------
  * Function:	H5B2_get_root_addr_test
  *
  * Purpose:	Retrieve the root node's address
diff --git a/src/H5Fdbg.c b/src/H5Fdbg.c
index 40d24e5..93da900 100644
--- a/src/H5Fdbg.c
+++ b/src/H5Fdbg.c
@@ -104,6 +104,8 @@ H5F_debug(H5F_t *f, FILE *stream, int indent, int fwidth)
 	      "Symbol table leaf node 1/2 rank:", f->shared->sblock->sym_leaf_k);
     HDfprintf(stream, "%*s%-*s %u\n", indent, "", fwidth,
 	      "Symbol table internal node 1/2 rank:", f->shared->sblock->btree_k[H5B_SNODE_ID]);
+    HDfprintf(stream, "%*s%-*s %u\n", indent, "", fwidth,
+	      "Indexed storage internal node 1/2 rank:", f->shared->sblock->btree_k[H5B_CHUNK_ID]);
     HDfprintf(stream, "%*s%-*s 0x%02x\n", indent, "", fwidth,
 	      "File status flags:", (unsigned)(f->shared->sblock->status_flags));
     HDfprintf(stream, "%*s%-*s %a (rel)\n", indent, "", fwidth,
diff --git a/src/H5Gbtree2.c b/src/H5Gbtree2.c
index 06af245..31db886 100644
--- a/src/H5Gbtree2.c
+++ b/src/H5Gbtree2.c
@@ -83,8 +83,7 @@ static herr_t H5G_dense_btree2_corder_encode(uint8_t *raw, const void *native,
     void *ctx);
 static herr_t H5G_dense_btree2_corder_decode(const uint8_t *raw, void *native,
     void *ctx);
-static herr_t H5G_dense_btree2_corder_debug(FILE *stream, const H5F_t *f, hid_t dxpl_id,
-    int indent, int fwidth, const void *record, const void *_udata);
+static herr_t H5G_dense_btree2_corder_debug(FILE *stream, int indent, int fwidth, const void *record);
 
 /* v2 B-tree driver callbacks for 'name' index */
 static herr_t H5G_dense_btree2_name_store(void *native, const void *udata);
@@ -93,8 +92,7 @@ static herr_t H5G_dense_btree2_name_encode(uint8_t *raw, const void *native,
     void *ctx);
 static herr_t H5G_dense_btree2_name_decode(const uint8_t *raw, void *native,
     void *ctx);
-static herr_t H5G_dense_btree2_name_debug(FILE *stream, const H5F_t *f, hid_t dxpl_id,
-    int indent, int fwidth, const void *record, const void *_udata);
+static herr_t H5G_dense_btree2_name_debug(FILE *stream, int indent, int fwidth, const void *record);
 
 /* Fractal heap function callbacks */
 static herr_t H5G_dense_fh_name_cmp(const void *obj, size_t obj_len, void *op_data);
@@ -114,9 +112,7 @@ const H5B2_class_t H5G_BT2_NAME[1]={{   /* B-tree class information */
     H5G_dense_btree2_name_compare,      /* Record comparison callback */
     H5G_dense_btree2_name_encode,       /* Record encoding callback */
     H5G_dense_btree2_name_decode,       /* Record decoding callback */
-    H5G_dense_btree2_name_debug,        /* Record debugging callback */
-    NULL,                               /* Create debugging context */
-    NULL                                /* Destroy debugging context */
+    H5G_dense_btree2_name_debug         /* Record debugging callback */
 }};
 
 /* v2 B-tree class for indexing 'creation order' field of links */
@@ -130,9 +126,7 @@ const H5B2_class_t H5G_BT2_CORDER[1]={{ /* B-tree class information */
     H5G_dense_btree2_corder_compare,    /* Record comparison callback */
     H5G_dense_btree2_corder_encode,     /* Record encoding callback */
     H5G_dense_btree2_corder_decode,     /* Record decoding callback */
-    H5G_dense_btree2_corder_debug,      /* Record debugging callback */
-    NULL,                               /* Create debugging context */
-    NULL                                /* Destroy debugging context */
+    H5G_dense_btree2_corder_debug       /* Record debugging callback */
 }};
 
 /*****************************/
@@ -362,9 +356,7 @@ H5G_dense_btree2_name_decode(const uint8_t *raw, void *_nrecord, void H5_ATTR_UN
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5G_dense_btree2_name_debug(FILE *stream, const H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id,
-    int indent, int fwidth, const void *_nrecord,
-    const void H5_ATTR_UNUSED *_udata)
+H5G_dense_btree2_name_debug(FILE *stream, int indent, int fwidth, const void *_nrecord)
 {
     const H5G_dense_bt2_name_rec_t *nrecord = (const H5G_dense_bt2_name_rec_t *)_nrecord;
     unsigned u;                 /* Local index variable */
@@ -528,9 +520,7 @@ H5G_dense_btree2_corder_decode(const uint8_t *raw, void *_nrecord, void H5_ATTR_
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5G_dense_btree2_corder_debug(FILE *stream, const H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id,
-    int indent, int fwidth, const void *_nrecord,
-    const void H5_ATTR_UNUSED *_udata)
+H5G_dense_btree2_corder_debug(FILE *stream, int indent, int fwidth, const void *_nrecord)
 {
     const H5G_dense_bt2_corder_rec_t *nrecord = (const H5G_dense_bt2_corder_rec_t *)_nrecord;
     unsigned u;                 /* Local index variable */
diff --git a/src/H5HF.c b/src/H5HF.c
index 0464da4..4a0ad07 100644
--- a/src/H5HF.c
+++ b/src/H5HF.c
@@ -451,8 +451,8 @@ H5HF_get_obj_len(H5HF_t *fh, hid_t dxpl_id, const void *_id, size_t *obj_len_p)
             HGOTO_ERROR(H5E_HEAP, H5E_CANTGET, FAIL, "can't get 'tiny' object's length")
     } /* end if */
     else {
-        HDfprintf(stderr, "%s: Heap ID type not supported yet!\n", FUNC);
-        HGOTO_ERROR(H5E_HEAP, H5E_UNSUPPORTED, FAIL, "heap ID type not supported yet")
+HDfprintf(stderr, "%s: Heap ID type not supported yet!\n", FUNC);
+HGOTO_ERROR(H5E_HEAP, H5E_UNSUPPORTED, FAIL, "heap ID type not supported yet")
     } /* end else */
 
 done:
@@ -461,6 +461,68 @@ done:
 
 
 /*-------------------------------------------------------------------------
+ * Function:	H5HF_get_obj_off
+ *
+ * Purpose:	Get the offset of an entry in a fractal heap
+ *
+ * Return:	SUCCEED/FAIL
+ *
+ * Programmer:	Quincey Koziol
+ *		koziol@hdfgroup.org
+ *		Aug 20 2015
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5HF_get_obj_off(H5HF_t *fh, hid_t dxpl_id, const void *_id, hsize_t *obj_off_p)
+{
+    const uint8_t *id = (const uint8_t *)_id;   /* Object ID */
+    uint8_t id_flags;                   /* Heap ID flag bits */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI(FAIL)
+
+    /*
+     * Check arguments.
+     */
+    HDassert(fh);
+    HDassert(id);
+    HDassert(obj_off_p);
+
+    /* Get the ID flags */
+    id_flags = *id;
+
+    /* Check for correct heap ID version */
+    if((id_flags & H5HF_ID_VERS_MASK) != H5HF_ID_VERS_CURR)
+        HGOTO_ERROR(H5E_HEAP, H5E_VERSION, FAIL, "incorrect heap ID version")
+
+    /* Set the shared heap header's file context for this operation */
+    fh->hdr->f = fh->f;
+
+    /* Check type of object in heap */
+    if((id_flags & H5HF_ID_TYPE_MASK) == H5HF_ID_TYPE_MAN) {
+        H5HF__man_get_obj_off(fh->hdr, id, obj_off_p);
+    } /* end if */
+    else if((id_flags & H5HF_ID_TYPE_MASK) == H5HF_ID_TYPE_HUGE) {
+        /* Huge objects are located directly in the file */
+        if(H5HF__huge_get_obj_off(fh->hdr, dxpl_id, id, obj_off_p) < 0)
+            HGOTO_ERROR(H5E_HEAP, H5E_CANTGET, FAIL, "can't get 'huge' object's offset")
+    } /* end if */
+    else if((id_flags & H5HF_ID_TYPE_MASK) == H5HF_ID_TYPE_TINY) {
+        /* Tiny objects are not stored in the heap */
+        *obj_off_p = (hsize_t)0;
+    } /* end if */
+    else {
+HDfprintf(stderr, "%s: Heap ID type not supported yet!\n", FUNC);
+HGOTO_ERROR(H5E_HEAP, H5E_UNSUPPORTED, FAIL, "heap ID type not supported yet")
+    } /* end else */
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5HF_get_obj_off() */
+
+
+/*-------------------------------------------------------------------------
  * Function:	H5HF_read
  *
  * Purpose:	Read an object from a fractal heap into a buffer
diff --git a/src/H5HFbtree2.c b/src/H5HFbtree2.c
index 0229ebe..cb1ec77 100644
--- a/src/H5HFbtree2.c
+++ b/src/H5HFbtree2.c
@@ -70,7 +70,6 @@ typedef struct H5HF_huge_bt2_ctx_t {
 
 static void *H5HF_huge_bt2_crt_context(void *udata);
 static herr_t H5HF_huge_bt2_dst_context(void *ctx);
-static void *H5HF_huge_bt2_crt_dbg_context(H5F_t *f, hid_t dxpl_id, haddr_t addr);
 
 static herr_t H5HF_huge_bt2_indir_store(void *native, const void *udata);
 static herr_t H5HF_huge_bt2_indir_compare(const void *rec1, const void *rec2);
@@ -78,8 +77,7 @@ static herr_t H5HF_huge_bt2_indir_encode(uint8_t *raw, const void *native,
     void *ctx);
 static herr_t H5HF_huge_bt2_indir_decode(const uint8_t *raw, void *native,
     void *ctx);
-static herr_t H5HF_huge_bt2_indir_debug(FILE *stream, const H5F_t *f, hid_t dxpl_id,
-    int indent, int fwidth, const void *record, const void *_udata);
+static herr_t H5HF_huge_bt2_indir_debug(FILE *stream, int indent, int fwidth, const void *record);
 
 static herr_t H5HF_huge_bt2_filt_indir_store(void *native, const void *udata);
 static herr_t H5HF_huge_bt2_filt_indir_compare(const void *rec1, const void *rec2);
@@ -87,8 +85,7 @@ static herr_t H5HF_huge_bt2_filt_indir_encode(uint8_t *raw, const void *native,
     void *ctx);
 static herr_t H5HF_huge_bt2_filt_indir_decode(const uint8_t *raw, void *native,
     void *ctx);
-static herr_t H5HF_huge_bt2_filt_indir_debug(FILE *stream, const H5F_t *f, hid_t dxpl_id,
-    int indent, int fwidth, const void *record, const void *_udata);
+static herr_t H5HF_huge_bt2_filt_indir_debug(FILE *stream, int indent, int fwidth, const void *record);
 
 static herr_t H5HF_huge_bt2_dir_store(void *native, const void *udata);
 static herr_t H5HF_huge_bt2_dir_compare(const void *rec1, const void *rec2);
@@ -96,8 +93,7 @@ static herr_t H5HF_huge_bt2_dir_encode(uint8_t *raw, const void *native,
     void *ctx);
 static herr_t H5HF_huge_bt2_dir_decode(const uint8_t *raw, void *native,
     void *ctx);
-static herr_t H5HF_huge_bt2_dir_debug(FILE *stream, const H5F_t *f, hid_t dxpl_id,
-    int indent, int fwidth, const void *record, const void *_udata);
+static herr_t H5HF_huge_bt2_dir_debug(FILE *stream, int indent, int fwidth, const void *record);
 
 static herr_t H5HF_huge_bt2_filt_dir_store(void *native, const void *udata);
 static herr_t H5HF_huge_bt2_filt_dir_compare(const void *rec1, const void *rec2);
@@ -105,8 +101,7 @@ static herr_t H5HF_huge_bt2_filt_dir_encode(uint8_t *raw, const void *native,
     void *ctx);
 static herr_t H5HF_huge_bt2_filt_dir_decode(const uint8_t *raw, void *native,
     void *ctx);
-static herr_t H5HF_huge_bt2_filt_dir_debug(FILE *stream, const H5F_t *f, hid_t dxpl_id,
-    int indent, int fwidth, const void *record, const void *_udata);
+static herr_t H5HF_huge_bt2_filt_dir_debug(FILE *stream, int indent, int fwidth, const void *record);
 
 /*********************/
 /* Package Variables */
@@ -122,9 +117,7 @@ const H5B2_class_t H5HF_HUGE_BT2_INDIR[1]={{ /* B-tree class information */
     H5HF_huge_bt2_indir_compare,            /* Record comparison callback */
     H5HF_huge_bt2_indir_encode,             /* Record encoding callback */
     H5HF_huge_bt2_indir_decode,             /* Record decoding callback */
-    H5HF_huge_bt2_indir_debug,              /* Record debugging callback */
-    H5HF_huge_bt2_crt_dbg_context,          /* Create debugging context */
-    H5HF_huge_bt2_dst_context               /* Destroy debugging context */
+    H5HF_huge_bt2_indir_debug               /* Record debugging callback */
 }};
 
 /* v2 B-tree class for indirectly accessed, filtered 'huge' objects */
@@ -138,9 +131,7 @@ const H5B2_class_t H5HF_HUGE_BT2_FILT_INDIR[1]={{ /* B-tree class information */
     H5HF_huge_bt2_filt_indir_compare,       /* Record comparison callback */
     H5HF_huge_bt2_filt_indir_encode,        /* Record encoding callback */
     H5HF_huge_bt2_filt_indir_decode,        /* Record decoding callback */
-    H5HF_huge_bt2_filt_indir_debug,         /* Record debugging callback */
-    H5HF_huge_bt2_crt_dbg_context,          /* Create debugging context */
-    H5HF_huge_bt2_dst_context               /* Destroy debugging context */
+    H5HF_huge_bt2_filt_indir_debug          /* Record debugging callback */
 }};
 
 /* v2 B-tree class for directly accessed 'huge' objects */
@@ -154,9 +145,7 @@ const H5B2_class_t H5HF_HUGE_BT2_DIR[1]={{  /* B-tree class information */
     H5HF_huge_bt2_dir_compare,              /* Record comparison callback */
     H5HF_huge_bt2_dir_encode,               /* Record encoding callback */
     H5HF_huge_bt2_dir_decode,               /* Record decoding callback */
-    H5HF_huge_bt2_dir_debug,                /* Record debugging callback */
-    H5HF_huge_bt2_crt_dbg_context,          /* Create debugging context */
-    H5HF_huge_bt2_dst_context               /* Destroy debugging context */
+    H5HF_huge_bt2_dir_debug                 /* Record debugging callback */
 }};
 
 /* v2 B-tree class for directly accessed, filtered 'huge' objects */
@@ -170,9 +159,7 @@ const H5B2_class_t H5HF_HUGE_BT2_FILT_DIR[1]={{ /* B-tree class information */
     H5HF_huge_bt2_filt_dir_compare,         /* Record comparison callback */
     H5HF_huge_bt2_filt_dir_encode,          /* Record encoding callback */
     H5HF_huge_bt2_filt_dir_decode,          /* Record decoding callback */
-    H5HF_huge_bt2_filt_dir_debug,           /* Record debugging callback */
-    H5HF_huge_bt2_crt_dbg_context,          /* Create debugging context */
-    H5HF_huge_bt2_dst_context               /* Destroy debugging context */
+    H5HF_huge_bt2_filt_dir_debug            /* Record debugging callback */
 }};
 
 /*****************************/
@@ -265,46 +252,6 @@ H5HF_huge_bt2_dst_context(void *_ctx)
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5HF_huge_bt2_crt_dbg_context
- *
- * Purpose:	Create context for debugging callback
- *
- * Return:	Success:	non-NULL
- *		Failure:	NULL
- *
- * Programmer:	Quincey Koziol
- *              Tuesday, December 1, 2009
- *
- *-------------------------------------------------------------------------
- */
-static void *
-H5HF_huge_bt2_crt_dbg_context(H5F_t *f, hid_t H5_ATTR_UNUSED dxpl_id, haddr_t H5_ATTR_UNUSED addr)
-{
-    H5HF_huge_bt2_ctx_t *ctx;   /* Callback context structure */
-    void *ret_value;            /* Return value */
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    /* Sanity check */
-    HDassert(f);
-
-    /* Allocate callback context */
-    if(NULL == (ctx = H5FL_MALLOC(H5HF_huge_bt2_ctx_t)))
-        HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, NULL, "can't allocate callback context")
-
-    /* Determine the size of addresses & lengths in the file */
-    ctx->sizeof_addr = H5F_SIZEOF_ADDR(f);
-    ctx->sizeof_size = H5F_SIZEOF_SIZE(f);
-
-    /* Set return value */
-    ret_value = ctx;
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* H5HF_huge_bt2_crt_dbg_context() */
-
-
-/*-------------------------------------------------------------------------
  * Function:	H5HF_huge_bt2_indir_found
  *
  * Purpose:	Retrieve record for indirectly accessed 'huge' object, when
@@ -505,9 +452,7 @@ H5HF_huge_bt2_indir_decode(const uint8_t *raw, void *_nrecord, void *_ctx)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_huge_bt2_indir_debug(FILE *stream, const H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id,
-    int indent, int fwidth, const void *_nrecord,
-    const void H5_ATTR_UNUSED *_udata)
+H5HF_huge_bt2_indir_debug(FILE *stream, int indent, int fwidth, const void *_nrecord)
 {
     const H5HF_huge_bt2_indir_rec_t *nrecord = (const H5HF_huge_bt2_indir_rec_t *)_nrecord;
 
@@ -727,9 +672,7 @@ H5HF_huge_bt2_filt_indir_decode(const uint8_t *raw, void *_nrecord, void *_ctx)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_huge_bt2_filt_indir_debug(FILE *stream, const H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id,
-    int indent, int fwidth, const void *_nrecord,
-    const void H5_ATTR_UNUSED *_udata)
+H5HF_huge_bt2_filt_indir_debug(FILE *stream, int indent, int fwidth, const void *_nrecord)
 {
     const H5HF_huge_bt2_filt_indir_rec_t *nrecord = (const H5HF_huge_bt2_filt_indir_rec_t *)_nrecord;
 
@@ -920,9 +863,7 @@ H5HF_huge_bt2_dir_decode(const uint8_t *raw, void *_nrecord, void *_ctx)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_huge_bt2_dir_debug(FILE *stream, const H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id,
-    int indent, int fwidth, const void *_nrecord,
-    const void H5_ATTR_UNUSED *_udata)
+H5HF_huge_bt2_dir_debug(FILE *stream, int indent, int fwidth, const void *_nrecord)
 {
     const H5HF_huge_bt2_dir_rec_t *nrecord = (const H5HF_huge_bt2_dir_rec_t *)_nrecord;
 
@@ -1149,8 +1090,7 @@ H5HF_huge_bt2_filt_dir_decode(const uint8_t *raw, void *_nrecord, void *_ctx)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5HF_huge_bt2_filt_dir_debug(FILE *stream, const H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id,
-    int indent, int fwidth, const void *_nrecord, const void H5_ATTR_UNUSED *_udata)
+H5HF_huge_bt2_filt_dir_debug(FILE *stream, int indent, int fwidth, const void *_nrecord)
 {
     const H5HF_huge_bt2_filt_dir_rec_t *nrecord = (const H5HF_huge_bt2_filt_dir_rec_t *)_nrecord;
 
diff --git a/src/H5HFdbg.c b/src/H5HFdbg.c
index 5183b67..736b98d 100644
--- a/src/H5HFdbg.c
+++ b/src/H5HFdbg.c
@@ -100,6 +100,80 @@ static herr_t H5HF_dtable_debug(const H5HF_dtable_t *dtable, FILE *stream,
 
 
 /*-------------------------------------------------------------------------
+ * Function:	H5HF_id_print
+ *
+ * Purpose:	Prints a fractal heap ID.
+ *
+ * Return:	Non-negative on success/Negative on failure
+ *
+ * Programmer:	Quincey Koziol
+ *		koziol@hdfgroup.org
+ *		Aug 20 2015
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5HF_id_print(H5HF_t *fh, hid_t dxpl_id, const void *_id, FILE *stream, int indent, int fwidth)
+{
+    const uint8_t *id = (const uint8_t *)_id;   /* Object ID */
+    uint8_t id_flags;                   /* Heap ID flag bits */
+    hsize_t obj_off;                    /* Offset of object */
+    size_t obj_len;                     /* Length of object */
+    char id_type;                       /* Character for the type of heap ID */
+    herr_t      ret_value = SUCCEED;    /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    /*
+     * Check arguments.
+     */
+    HDassert(fh);
+    HDassert(id);
+    HDassert(stream);
+    HDassert(indent >= 0);
+    HDassert(fwidth >= 0);
+
+    /* Get the ID flags */
+    id_flags = *id;
+
+    /* Check for correct heap ID version */
+    if((id_flags & H5HF_ID_VERS_MASK) != H5HF_ID_VERS_CURR)
+        HGOTO_ERROR(H5E_HEAP, H5E_VERSION, FAIL, "incorrect heap ID version")
+
+    /* Check type of object in heap */
+    if((id_flags & H5HF_ID_TYPE_MASK) == H5HF_ID_TYPE_MAN) {
+        id_type = 'M';
+    } /* end if */
+    else if((id_flags & H5HF_ID_TYPE_MASK) == H5HF_ID_TYPE_HUGE) {
+        id_type = 'H';
+    } /* end if */
+    else if((id_flags & H5HF_ID_TYPE_MASK) == H5HF_ID_TYPE_TINY) {
+        id_type = 'T';
+    } /* end if */
+    else {
+HDfprintf(stderr, "%s: Heap ID type not supported yet!\n", FUNC);
+HGOTO_ERROR(H5E_HEAP, H5E_UNSUPPORTED, FAIL, "heap ID type not supported yet")
+    } /* end else */
+
+    /* Get the length of the heap object */
+    if(H5HF_get_obj_len(fh, dxpl_id, id, &obj_len) < 0)
+        HGOTO_ERROR(H5E_HEAP, H5E_CANTGET, FAIL, "can't retrieve heap ID length")
+
+    /* Get the offset of the heap object */
+    if(H5HF_get_obj_off(fh, dxpl_id, id, &obj_off) < 0)
+        HGOTO_ERROR(H5E_HEAP, H5E_CANTGET, FAIL, "can't retrieve heap ID length")
+
+    /* Display the heap ID */
+    HDfprintf(stream, "%*s%-*s (%c, %Hu, %Zu)\n", indent, "", fwidth,
+	      "Heap ID info: (type, offset, length)",
+              id_type, obj_off, obj_len);
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5HF_id_print() */
+
+
+/*-------------------------------------------------------------------------
  * Function:	H5HF_dtable_debug
  *
  * Purpose:	Prints debugging info about a doubling table
diff --git a/src/H5HFhuge.c b/src/H5HFhuge.c
index 7f0da02..04cd425 100644
--- a/src/H5HFhuge.c
+++ b/src/H5HFhuge.c
@@ -585,6 +585,93 @@ done:
 
 
 /*-------------------------------------------------------------------------
+ * Function:	H5HF__huge_get_obj_off
+ *
+ * Purpose:	Get the offset of a 'huge' object in a fractal heap
+ *
+ * Return:	SUCCEED/FAIL
+ *
+ * Programmer:	Quincey Koziol
+ *		koziol@hdfgroup.org
+ *		Aug  8 2006
+ *
+ *-------------------------------------------------------------------------
+ */
+herr_t
+H5HF__huge_get_obj_off(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
+    hsize_t *obj_off_p)
+{
+    haddr_t obj_addr;                   /* Object's address in the file */
+    herr_t ret_value = SUCCEED;         /* Return value */
+
+    FUNC_ENTER_NOAPI_NOINIT
+
+    /*
+     * Check arguments.
+     */
+    HDassert(hdr);
+    HDassert(H5F_addr_defined(hdr->huge_bt2_addr));
+    HDassert(id);
+    HDassert(obj_off_p);
+
+    /* Skip over the flag byte */
+    id++;
+
+    /* Check if 'huge' object ID encodes address & length directly */
+    if(hdr->huge_ids_direct) {
+        /* Retrieve the object's address (common) */
+        H5F_addr_decode(hdr->f, &id, &obj_addr);
+    } /* end if */
+    else {
+        /* Sanity check */
+        HDassert(H5F_addr_defined(hdr->huge_bt2_addr));
+
+        /* Check if v2 B-tree is open yet */
+        if(NULL == hdr->huge_bt2) {
+            /* Open existing v2 B-tree */
+            if(NULL == (hdr->huge_bt2 = H5B2_open(hdr->f, dxpl_id, hdr->huge_bt2_addr, hdr->f)))
+                HGOTO_ERROR(H5E_HEAP, H5E_CANTOPENOBJ, FAIL, "unable to open v2 B-tree for tracking 'huge' heap objects")
+        } /* end if */
+
+        if(hdr->filter_len > 0) {
+            H5HF_huge_bt2_filt_indir_rec_t found_rec;  /* Record found from tracking object */
+            H5HF_huge_bt2_filt_indir_rec_t search_rec; /* Record for searching for object */
+
+            /* Get ID for looking up 'huge' object in v2 B-tree */
+            UINT64DECODE_VAR(id, search_rec.id, hdr->huge_id_size)
+
+            /* Look up object in v2 B-tree */
+            if(H5B2_find(hdr->huge_bt2, dxpl_id, &search_rec, H5HF_huge_bt2_filt_indir_found, &found_rec) != TRUE)
+                HGOTO_ERROR(H5E_HEAP, H5E_NOTFOUND, FAIL, "can't find object in B-tree")
+
+            /* Retrieve the object's address & length */
+            obj_addr = found_rec.addr;
+        } /* end if */
+        else {
+            H5HF_huge_bt2_indir_rec_t found_rec;  /* Record found from tracking object */
+            H5HF_huge_bt2_indir_rec_t search_rec; /* Record for searching for object */
+
+            /* Get ID for looking up 'huge' object in v2 B-tree */
+            UINT64DECODE_VAR(id, search_rec.id, hdr->huge_id_size)
+
+            /* Look up object in v2 B-tree */
+            if(H5B2_find(hdr->huge_bt2, dxpl_id, &search_rec, H5HF_huge_bt2_indir_found, &found_rec) != TRUE)
+                HGOTO_ERROR(H5E_HEAP, H5E_NOTFOUND, FAIL, "can't find object in B-tree")
+
+            /* Retrieve the object's address & length */
+            obj_addr = found_rec.addr;
+        } /* end else */
+    } /* end else */
+
+    /* Set the value to return */
+    *obj_off_p = (hsize_t)obj_addr;
+
+done:
+    FUNC_LEAVE_NOAPI(ret_value)
+} /* end H5HF__huge_get_obj_off() */
+
+
+/*-------------------------------------------------------------------------
  * Function:	H5HF_huge_op_real
  *
  * Purpose:	Internal routine to perform an operation on a 'huge' object
diff --git a/src/H5HFman.c b/src/H5HFman.c
index 5f95a91..cfbcd87 100644
--- a/src/H5HFman.c
+++ b/src/H5HFman.c
@@ -256,6 +256,41 @@ H5HF_man_get_obj_len(H5HF_hdr_t *hdr, const uint8_t *id, size_t *obj_len_p)
 
 
 /*-------------------------------------------------------------------------
+ * Function:    H5HF__man_get_obj_off
+ *
+ * Purpose:     Get the offset of a managed heap object
+ *
+ * Return:      SUCCEED (Can't fail)
+ *
+ * Programmer:	Quincey Koziol
+ *		koziol@hdfgroup.org
+ *		Aug 20 2015
+ *
+ *-------------------------------------------------------------------------
+ */
+void
+H5HF__man_get_obj_off(const H5HF_hdr_t *hdr, const uint8_t *id, hsize_t *obj_off_p)
+{
+    FUNC_ENTER_PACKAGE_NOERR
+
+    /*
+     * Check arguments.
+     */
+    HDassert(hdr);
+    HDassert(id);
+    HDassert(obj_off_p);
+    
+    /* Skip over the flag byte */
+    id++;
+
+    /* Skip over object offset */
+    UINT64DECODE_VAR(id, *obj_off_p, hdr->heap_off_size);
+
+    FUNC_LEAVE_NOAPI_VOID
+} /* end H5HF__man_get_obj_off() */
+
+
+/*-------------------------------------------------------------------------
  * Function:	H5HF_man_op_real
  *
  * Purpose:	Internal routine to perform an operation on a managed heap
diff --git a/src/H5HFpkg.h b/src/H5HFpkg.h
index 4655d83..685c83a 100644
--- a/src/H5HFpkg.h
+++ b/src/H5HFpkg.h
@@ -702,6 +702,8 @@ H5_DLL herr_t H5HF_man_insert(H5HF_hdr_t *fh, hid_t dxpl_id, size_t obj_size,
     const void *obj, void *id);
 H5_DLL herr_t H5HF_man_get_obj_len(H5HF_hdr_t *hdr, const uint8_t *id,
     size_t *obj_len_p);
+H5_DLL void H5HF__man_get_obj_off(const H5HF_hdr_t *hdr, const uint8_t *id,
+    hsize_t *obj_off_p);
 H5_DLL herr_t H5HF_man_read(H5HF_hdr_t *fh, hid_t dxpl_id, const uint8_t *id,
     void *obj);
 H5_DLL herr_t H5HF_man_write(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
@@ -716,6 +718,8 @@ H5_DLL herr_t H5HF_huge_insert(H5HF_hdr_t *hdr, hid_t dxpl_id, size_t obj_size,
     void *obj, void *id);
 H5_DLL herr_t H5HF_huge_get_obj_len(H5HF_hdr_t *hdr, hid_t dxpl_id,
     const uint8_t *id, size_t *obj_len_p);
+H5_DLL herr_t H5HF__huge_get_obj_off(H5HF_hdr_t *hdr, hid_t dxpl_id,
+    const uint8_t *id, hsize_t *obj_off_p);
 H5_DLL herr_t H5HF_huge_read(H5HF_hdr_t *fh, hid_t dxpl_id, const uint8_t *id,
     void *obj);
 H5_DLL herr_t H5HF_huge_write(H5HF_hdr_t *hdr, hid_t dxpl_id, const uint8_t *id,
@@ -748,7 +752,7 @@ H5_DLL herr_t H5HF_tiny_remove(H5HF_hdr_t *fh, const uint8_t *id);
 
 /* Debugging routines for dumping file structures */
 H5_DLL void H5HF_hdr_print(const H5HF_hdr_t *hdr, hid_t dxpl_id,
-	hbool_t dump_internal, FILE *stream, int indent, int fwidth);
+    hbool_t dump_internal, FILE *stream, int indent, int fwidth);
 H5_DLL herr_t H5HF_hdr_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr,
     FILE *stream, int indent, int fwidth);
 H5_DLL herr_t H5HF_dblock_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr,
diff --git a/src/H5HFprivate.h b/src/H5HFprivate.h
index 55daa30..441ad3e 100644
--- a/src/H5HFprivate.h
+++ b/src/H5HFprivate.h
@@ -116,6 +116,8 @@ H5_DLL herr_t H5HF_insert(H5HF_t *fh, hid_t dxpl_id, size_t size,
     const void *obj, void *id/*out*/);
 H5_DLL herr_t H5HF_get_obj_len(H5HF_t *fh, hid_t dxpl_id, const void *id,
     size_t *obj_len_p/*out*/);
+H5_DLL herr_t H5HF_get_obj_off(H5HF_t *fh, hid_t dxpl_id, const void *_id,
+    hsize_t *obj_off_p/*out*/);
 H5_DLL herr_t H5HF_read(H5HF_t *fh, hid_t dxpl_id, const void *id,
     void *obj/*out*/);
 H5_DLL herr_t H5HF_write(H5HF_t *fh, hid_t dxpl_id, void *id, hbool_t *id_changed,
@@ -131,6 +133,8 @@ H5_DLL herr_t H5HF_stat_info(const H5HF_t *fh, H5HF_stat_t *stats);
 H5_DLL herr_t H5HF_size(const H5HF_t *fh, hid_t dxpl_id, hsize_t *heap_size/*out*/);
 
 /* Debugging routines */
+H5_DLL herr_t H5HF_id_print(H5HF_t *fh, hid_t dxpl_id,
+    const void *id, FILE *stream, int indent, int fwidth);
 #ifdef H5HF_DEBUGGING
 H5_DLL herr_t H5HF_sects_debug(H5F_t *f, hid_t dxpl_id, haddr_t addr,
     FILE *stream, int indent, int fwidth);
diff --git a/src/H5Odbg.c b/src/H5Odbg.c
index 0388cd5..bd789c5 100644
--- a/src/H5Odbg.c
+++ b/src/H5Odbg.c
@@ -454,20 +454,23 @@ H5O_debug_real(H5F_t *f, hid_t dxpl_id, H5O_t *oh, haddr_t addr, FILE *stream, i
 	if(oh->mesg[i].flags) {
             hbool_t flag_printed = FALSE;
 
-            if(oh->mesg[i].flags & H5O_MSG_FLAG_SHARED) {
-                HDfprintf(stream, "<S");
-                flag_printed = TRUE;
-            } /* end if */
+            /* Sanity check that all flags in format are covered below */
+            HDcompile_assert(H5O_MSG_FLAG_BITS == (H5O_MSG_FLAG_CONSTANT|H5O_MSG_FLAG_SHARED|H5O_MSG_FLAG_DONTSHARE|H5O_MSG_FLAG_FAIL_IF_UNKNOWN_AND_OPEN_FOR_WRITE|H5O_MSG_FLAG_MARK_IF_UNKNOWN|H5O_MSG_FLAG_WAS_UNKNOWN|H5O_MSG_FLAG_SHAREABLE|H5O_MSG_FLAG_FAIL_IF_UNKNOWN_ALWAYS));
+
             if(oh->mesg[i].flags & H5O_MSG_FLAG_CONSTANT) {
                 HDfprintf(stream, "%sC", (flag_printed ? ", " : "<"));
                 flag_printed = TRUE;
             } /* end if */
+            if(oh->mesg[i].flags & H5O_MSG_FLAG_SHARED) {
+                HDfprintf(stream, "%sS", (flag_printed ? ", " : "<"));
+                flag_printed = TRUE;
+            } /* end if */
             if(oh->mesg[i].flags & H5O_MSG_FLAG_DONTSHARE) {
                 HDfprintf(stream, "%sDS", (flag_printed ? ", " : "<"));
                 flag_printed = TRUE;
             } /* end if */
             if(oh->mesg[i].flags & H5O_MSG_FLAG_FAIL_IF_UNKNOWN_AND_OPEN_FOR_WRITE) {
-                HDfprintf(stream, "%sFIU", (flag_printed ? ", " : "<"));
+                HDfprintf(stream, "%sFIUW", (flag_printed ? ", " : "<"));
                 flag_printed = TRUE;
             } /* end if */
             if(oh->mesg[i].flags & H5O_MSG_FLAG_MARK_IF_UNKNOWN) {
@@ -479,6 +482,14 @@ H5O_debug_real(H5F_t *f, hid_t dxpl_id, H5O_t *oh, haddr_t addr, FILE *stream, i
                 HDfprintf(stream, "%sWU", (flag_printed ? ", " : "<"));
                 flag_printed = TRUE;
             } /* end if */
+            if(oh->mesg[i].flags & H5O_MSG_FLAG_SHAREABLE) {
+                HDfprintf(stream, "%sSA", (flag_printed ? ", " : "<"));
+                flag_printed = TRUE;
+            } /* end if */
+            if(oh->mesg[i].flags & H5O_MSG_FLAG_FAIL_IF_UNKNOWN_ALWAYS) {
+                HDfprintf(stream, "%sFIUA", (flag_printed ? ", " : "<"));
+                flag_printed = TRUE;
+            } /* end if */
             if(!flag_printed)
                 HDfprintf(stream, "-");
             HDfprintf(stream, ">\n");
diff --git a/src/H5Olink.c b/src/H5Olink.c
index 53191ca..7e70196 100644
--- a/src/H5Olink.c
+++ b/src/H5Olink.c
@@ -834,7 +834,7 @@ H5O_link_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const void
     HDfprintf(stream, "%*s%-*s %s\n", indent, "", fwidth,
 	      "Link Name Character Set:", (lnk->cset == H5T_CSET_ASCII ?
                 "ASCII" : (lnk->cset == H5T_CSET_UTF8 ? "UTF-8" : "Unknown")));
-    HDfprintf(stream, "%*s%-*s %s\n", indent, "", fwidth,
+    HDfprintf(stream, "%*s%-*s '%s'\n", indent, "", fwidth,
 	      "Link Name:", lnk->name);
 
     /* Display link-specific information */
@@ -845,7 +845,7 @@ H5O_link_debug(H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id, const void
             break;
 
         case H5L_TYPE_SOFT:
-            HDfprintf(stream, "%*s%-*s %s\n", indent, "", fwidth,
+            HDfprintf(stream, "%*s%-*s '%s'\n", indent, "", fwidth,
                       "Link Value:", lnk->u.soft.name);
             break;
 
diff --git a/src/H5SM.c b/src/H5SM.c
index 1d391f1..1fc3b85 100644
--- a/src/H5SM.c
+++ b/src/H5SM.c
@@ -2580,14 +2580,15 @@ done:
  *-------------------------------------------------------------------------
  */
 herr_t
-H5SM_list_debug(H5F_t *f, hid_t dxpl_id, haddr_t list_addr,
-                         FILE *stream, int indent, int fwidth,
-                         unsigned table_vers, size_t num_messages)
+H5SM_list_debug(H5F_t *f, hid_t dxpl_id, haddr_t list_addr, FILE *stream,
+    int indent, int fwidth, haddr_t table_addr)
 {
-
+    H5SM_master_table_t *table = NULL;  /* SOHM master table */
     H5SM_list_t *list = NULL;           /* SOHM index list for message type (if in list form) */
-    H5SM_index_header_t header;         /* A "false" header used to read the list */
-    H5SM_list_cache_ud_t cache_udata;   /* User-data for metadata cache callback */
+    H5SM_list_cache_ud_t lst_cache_udata;   /* List user-data for metadata cache callback */
+    H5SM_table_cache_ud_t tbl_cache_udata;  /* Table user-data for metadata cache callback */
+    H5HF_t *fh = NULL;                  /* Fractal heap for SOHM messages */
+    unsigned index_num;                 /* Index of list, within master table */
     unsigned x;                         /* Counter variable */
     herr_t ret_value = SUCCEED;         /* Return value */
 
@@ -2599,36 +2600,51 @@ H5SM_list_debug(H5F_t *f, hid_t dxpl_id, haddr_t list_addr,
     HDassert(indent >= 0);
     HDassert(fwidth >= 0);
 
-    /* Check arguments.  Version must be 0, the only version implemented so far */
-    if(table_vers > H5SM_LIST_VERSION)
-        HGOTO_ERROR(H5E_SOHM, H5E_BADVALUE, FAIL, "unknown shared message list version")
-    if(num_messages == 0 || num_messages > H5O_SHMESG_MAX_LIST_SIZE)
-        HGOTO_ERROR(H5E_SOHM, H5E_BADVALUE, FAIL, "number of indexes must be between 1 and H5O_SHMESG_MAX_NINDEXES")
+    /* Set up user data for callback */
+    tbl_cache_udata.f = f;
+
+    /* Look up the master SOHM table */
+    if(NULL == (table = (H5SM_master_table_t *)H5AC_protect(f, dxpl_id, H5AC_SOHM_TABLE, table_addr, &tbl_cache_udata, H5AC__READ_ONLY_FLAG)))
+	HGOTO_ERROR(H5E_SOHM, H5E_CANTPROTECT, FAIL, "unable to load SOHM master table")
 
-    /* Create a temporary header using the arguments.  The cache needs this to load the list. */
-    HDmemset(&header, 0, sizeof(H5SM_index_header_t));
-    header.list_max = header.num_messages = num_messages;
-    header.index_type = H5SM_LIST;
-    header.index_addr = list_addr;
+    /* Determine which index the list is part of */
+    index_num = table->num_indexes;
+    for(x = 0; x < table->num_indexes; x++) {
+        if(H5F_addr_eq(table->indexes[x].index_addr, list_addr)) {
+            index_num = x;
+            break;
+        } /* end if */
+    } /* end for */
+    if(x == table->num_indexes)
+        HGOTO_ERROR(H5E_SOHM, H5E_BADVALUE, FAIL, "list address doesn't match address for any indices in table")
 
     /* Set up user data for metadata cache callback */
-    cache_udata.f = f;
-    cache_udata.header = &header;
+    lst_cache_udata.f = f;
+    lst_cache_udata.header = &(table->indexes[index_num]);
 
     /* Get the list from the cache */
-    if(NULL == (list = (H5SM_list_t *)H5AC_protect(f, dxpl_id, H5AC_SOHM_LIST, list_addr, &cache_udata, H5AC__READ_ONLY_FLAG)))
+    if(NULL == (list = (H5SM_list_t *)H5AC_protect(f, dxpl_id, H5AC_SOHM_LIST, list_addr, &lst_cache_udata, H5AC__READ_ONLY_FLAG)))
 	HGOTO_ERROR(H5E_SOHM, H5E_CANTPROTECT, FAIL, "unable to load SOHM index")
 
+    /* Open the heap, if one exists */
+    if(H5F_addr_defined(table->indexes[index_num].heap_addr))
+        if(NULL == (fh = H5HF_open(f, dxpl_id, table->indexes[index_num].heap_addr)))
+            HGOTO_ERROR(H5E_SOHM, H5E_CANTOPENOBJ, FAIL, "unable to open SOHM heap")
+
     HDfprintf(stream, "%*sShared Message List Index...\n", indent, "");
-    for(x = 0; x < num_messages; ++x) {
+    for(x = 0; x < table->indexes[index_num].num_messages; ++x) {
         HDfprintf(stream, "%*sShared Object Header Message %d...\n", indent, "", x);
         HDfprintf(stream, "%*s%-*s %08lu\n", indent + 3, "", fwidth,
                 "Hash value:", (unsigned long)list->messages[x].hash);
         if(list->messages[x].location == H5SM_IN_HEAP) {
+            HDassert(fh);
+
             HDfprintf(stream, "%*s%-*s %s\n", indent + 3, "", fwidth,
                     "Location:", "in heap");
-            HDfprintf(stream, "%*s%-*s %Zu\n", indent + 3, "", fwidth,
+            HDfprintf(stream, "%*s%-*s 0x%Zx\n", indent + 3, "", fwidth,
                     "Heap ID:", list->messages[x].u.heap_loc.fheap_id);
+H5HF_id_print(fh, dxpl_id, 
+    &(list->messages[x].u.heap_loc.fheap_id), stream, indent + 6, (fwidth - 3));
             HDfprintf(stream, "%*s%-*s %u\n", indent + 3, "", fwidth,
                     "Reference count:", list->messages[x].u.heap_loc.ref_count);
         } /* end if */
@@ -2648,8 +2664,12 @@ H5SM_list_debug(H5F_t *f, hid_t dxpl_id, haddr_t list_addr,
     } /* end for */
 
 done:
+    if(fh && H5HF_close(fh, dxpl_id) < 0)
+	HDONE_ERROR(H5E_SOHM, H5E_CANTCLOSEOBJ, FAIL, "unable to close SOHM heap")
     if(list && H5AC_unprotect(f, dxpl_id, H5AC_SOHM_LIST, list_addr, list, H5AC__NO_FLAGS_SET) < 0)
 	HDONE_ERROR(H5E_SOHM, H5E_CANTUNPROTECT, FAIL, "unable to close SOHM index")
+    if(table && H5AC_unprotect(f, dxpl_id, H5AC_SOHM_TABLE, table_addr, table, H5AC__NO_FLAGS_SET) < 0)
+	HDONE_ERROR(H5E_SOHM, H5E_CANTUNPROTECT, FAIL, "unable to close SOHM master table")
 
     FUNC_LEAVE_NOAPI_TAG(ret_value, FAIL)
 } /* end H5SM_list_debug() */
diff --git a/src/H5SMbtree2.c b/src/H5SMbtree2.c
index e18e9fb..7706cbd 100644
--- a/src/H5SMbtree2.c
+++ b/src/H5SMbtree2.c
@@ -48,9 +48,8 @@
 static void *H5SM_bt2_crt_context(void *udata);
 static herr_t H5SM_bt2_dst_context(void *ctx);
 static herr_t H5SM_bt2_store(void *native, const void *udata);
-static herr_t H5SM_bt2_debug(FILE *stream, const H5F_t *f, hid_t dxpl_id,
-    int indent, int fwidth, const void *record, const void *_udata);
-static void *H5SM_bt2_crt_dbg_context(H5F_t *f, hid_t dxpl_id, haddr_t addr);
+static herr_t H5SM_bt2_debug(FILE *stream, int indent, int fwidth,
+    const void *record);
 
 
 /*****************************/
@@ -67,9 +66,7 @@ const H5B2_class_t H5SM_INDEX[1]={{   /* B-tree class information */
     H5SM_message_compare,             /* Record comparison callback */
     H5SM_message_encode,              /* Record encoding callback */
     H5SM_message_decode,              /* Record decoding callback */
-    H5SM_bt2_debug,                   /* Record debugging callback */
-    H5SM_bt2_crt_dbg_context,	      /* Create debugging context */
-    H5SM_bt2_dst_context 	      /* Destroy debugging context */
+    H5SM_bt2_debug                    /* Record debugging callback */
 }};
 
 
@@ -195,8 +192,7 @@ H5SM_bt2_store(void *native, const void *udata)
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5SM_bt2_debug(FILE *stream, const H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED dxpl_id,
-    int indent, int fwidth, const void *record, const void H5_ATTR_UNUSED *_udata)
+H5SM_bt2_debug(FILE *stream, int indent, int fwidth, const void *record)
 {
     const H5SM_sohm_t *sohm = (const H5SM_sohm_t *)record;
 
@@ -218,45 +214,6 @@ H5SM_bt2_debug(FILE *stream, const H5F_t H5_ATTR_UNUSED *f, hid_t H5_ATTR_UNUSED
 
 
 /*-------------------------------------------------------------------------
- * Function:	H5SM_bt2_crt_dbg_context
- *
- * Purpose:	Create context for debugging callback
- *
- * Return:	Success:	non-NULL
- *		Failure:	NULL
- *
- * Programmer:	Quincey Koziol
- *              Tuesday, December 1, 2009
- *
- *-------------------------------------------------------------------------
- */
-static void *
-H5SM_bt2_crt_dbg_context(H5F_t *f, hid_t H5_ATTR_UNUSED dxpl_id, haddr_t H5_ATTR_UNUSED addr)
-{
-    H5SM_bt2_ctx_t *ctx;        /* Callback context structure */
-    void *ret_value;            /* Return value */
-
-    FUNC_ENTER_NOAPI_NOINIT
-
-    /* Sanity check */
-    HDassert(f);
-
-    /* Allocate callback context */
-    if(NULL == (ctx = H5FL_MALLOC(H5SM_bt2_ctx_t)))
-        HGOTO_ERROR(H5E_HEAP, H5E_CANTALLOC, NULL, "can't allocate callback context")
-
-    /* Determine the size of addresses & lengths in the file */
-    ctx->sizeof_addr = H5F_SIZEOF_ADDR(f);
-
-    /* Set return value */
-    ret_value = ctx;
-
-done:
-    FUNC_LEAVE_NOAPI(ret_value)
-} /* H5SM_bt2_crt_dbg_context() */
-
-
-/*-------------------------------------------------------------------------
  * Function:	H5SM_bt2_convert_to_list_op
  *
  * Purpose:	An H5B2_remove_t callback function to convert a SOHM
diff --git a/src/H5SMprivate.h b/src/H5SMprivate.h
index d072434..57afacf 100644
--- a/src/H5SMprivate.h
+++ b/src/H5SMprivate.h
@@ -74,7 +74,7 @@ H5_DLL herr_t H5SM_table_debug(H5F_t *f, hid_t dxpl_id, haddr_t table_addr,
     FILE *stream, int indent, int fwidth, unsigned table_vers,
     unsigned num_indexes);
 H5_DLL herr_t H5SM_list_debug(H5F_t *f, hid_t dxpl_id, haddr_t list_addr,
-    FILE *stream, int indent, int fwidth, unsigned list_vers, size_t num_messages);
+    FILE *stream, int indent, int fwidth, haddr_t table_addr);
 
 #endif /*_H5SMprivate_H*/
 
diff --git a/tools/misc/h5debug.c b/tools/misc/h5debug.c
index 87c112a..be6d089 100644
--- a/tools/misc/h5debug.c
+++ b/tools/misc/h5debug.c
@@ -355,11 +355,11 @@ main(int argc, char *argv[])
 
                 /* Build array of chunk dimensions */
                 ndims = (unsigned)extra;
-                dim[0] = extra2;
+                dim[0] = (uint32_t)extra2;
                 if(ndims > 1)
-                    dim[1] = extra3;
+                    dim[1] = (uint32_t)extra3;
                 if(ndims > 2)
-                    dim[2] = extra4;
+                    dim[2] = (uint32_t)extra4;
 
                 /* Check for dimension error */
                 if(ndims > 3) {
@@ -502,14 +502,14 @@ main(int argc, char *argv[])
          */
 
         /* Check for enough valid parameters */
-        if(extra2 == 0) {
-            HDfprintf(stderr, "ERROR: Need list format version and number of messages in order to shared message list\n");
+        if(extra == 0) {
+            HDfprintf(stderr, "ERROR: Need shared message header address in order to shared message list\n");
             HDfprintf(stderr, "Shared message list usage:\n");
-            HDfprintf(stderr, "\th5debug <filename> <shared message list address> <list format version> <number of mesages in list>\n");
+            HDfprintf(stderr, "\th5debug <filename> <shared message list address> <shared message header address>\n");
             HDexit(4);
         } /* end if */
 
-        status = H5SM_list_debug(f, H5P_DATASET_XFER_DEFAULT, addr, stdout, 0, VCOL, (unsigned) extra, (size_t) extra2);
+        status = H5SM_list_debug(f, H5P_DATASET_XFER_DEFAULT, addr, stdout, 0, VCOL, (haddr_t)extra);
 
     } else if(!HDmemcmp(sig, H5EA_HDR_MAGIC, (size_t)H5_SIZEOF_MAGIC)) {
         /*