Fix for HDFFV-10209 VDS SWMR test failure

Free the object header when there are chksum retries.

3 files changed, 34 insertions, 7 deletions

diff --git a/src/H5Ocache.c b/src/H5Ocache.c
index 94049ef..2260e12 100644
--- a/src/H5Ocache.c
+++ b/src/H5Ocache.c
@@ -262,12 +262,23 @@ H5O__cache_verify_chksum(const void *_image, size_t len, void *_udata)
         uint32_t stored_chksum;     /* Stored metadata checksum value */
         uint32_t computed_chksum;   /* Computed metadata checksum value */
 
-	/* Get stored and computed checksums */
-	H5F_get_checksums(image, len, &stored_chksum, &computed_chksum);
-
-	if(stored_chksum != computed_chksum)
-	    ret_value = FALSE;
+        /* Get stored and computed checksums */
+        H5F_get_checksums(image, len, &stored_chksum, &computed_chksum);
+
+        if(stored_chksum != computed_chksum) {
+            /* These fields are not deserialized yet in H5O__prefix_deserialize() */
+            HDassert(udata->oh->chunk == NULL);
+            HDassert(udata->oh->mesg == NULL);
+            HDassert(udata->oh->proxy == NULL);
+
+            /* Indicate that udata->oh is to be freed later
+               in H5O__prefix_deserialize() */
+            udata->free_oh = TRUE;
+            ret_value = FALSE;
+        } /* end if */
     } /* end if */
+    else
+        HDassert(!(udata->common.file_intent & H5F_ACC_SWMR_WRITE));
 
     FUNC_LEAVE_NOAPI(ret_value)
 } /* end H5O__cache_verify_chksum() */
@@ -1263,8 +1274,22 @@ H5O__prefix_deserialize(const uint8_t *_image, H5O_cache_ud_t *udata)
     /* Verify object header prefix length */
     HDassert((size_t)(image - _image) == (size_t)(H5O_SIZEOF_HDR(oh) - H5O_SIZEOF_CHKSUM_OH(oh)));
 
-    /* Save the object header for later use in 'deserialize' callback */
-    udata->oh = oh;
+    /* If udata->oh is to be freed (see H5O__cache_verify_chksum), 
+       save the pointer to udata->oh and free it later after setting
+       udata->oh with the new object header */
+    if(udata->free_oh) {
+        H5O_t *saved_oh = udata->oh;
+        HDassert(udata->oh); 
+
+        /* Save the object header for later use in 'deserialize' callback */
+        udata->oh = oh;
+        if(H5O__free(saved_oh) < 0)
+            HGOTO_ERROR(H5E_OHDR, H5E_CANTRELEASE, FAIL, "can't destroy object header")
+        udata->free_oh = FALSE;
+    } else 
+        /* Save the object header for later use in 'deserialize' callback */
+        udata->oh = oh;
+
     oh = NULL;
 
 done:
diff --git a/src/H5Oint.c b/src/H5Oint.c
index 08eb28d..2351779 100644
--- a/src/H5Oint.c
+++ b/src/H5Oint.c
@@ -875,6 +875,7 @@ H5O_protect(const H5O_loc_t *loc, hid_t dxpl_id, unsigned prot_flags,
     udata.v1_pfx_nmesgs = 0;
     udata.chunk0_size = 0;
     udata.oh = NULL;
+    udata.free_oh = FALSE;
     udata.common.f = loc->file;
     udata.common.dxpl_id = dxpl_id;
     udata.common.file_intent = file_intent;
diff --git a/src/H5Opkg.h b/src/H5Opkg.h
index e970406..9392fa8 100644
--- a/src/H5Opkg.h
+++ b/src/H5Opkg.h
@@ -379,6 +379,7 @@ typedef struct H5O_cache_ud_t {
     unsigned v1_pfx_nmesgs;             /* Number of messages from v1 prefix header */
     size_t chunk0_size;                 /* Size of serialized first chunk    */
     H5O_t *oh;                          /* Partially deserialized object header, for later use */
+    hbool_t free_oh;                    /* Whether to free the object header or not */
     H5O_common_cache_ud_t common;       /* Common object header cache callback info */
 } H5O_cache_ud_t;