summaryrefslogtreecommitdiffstats
path: root/src/H5Ocopy.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/H5Ocopy.c')
-rw-r--r--src/H5Ocopy.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/src/H5Ocopy.c b/src/H5Ocopy.c
index 8e55503..7a10765 100644
--- a/src/H5Ocopy.c
+++ b/src/H5Ocopy.c
@@ -575,7 +575,15 @@ H5O_copy_header_real(const H5O_loc_t *oloc_src, H5O_loc_t *oloc_dst /*out */,
addr_new = oh_dst->chunk[0].addr;
/* Create memory image for the new chunk */
- if(NULL == (oh_dst->chunk[0].image = H5FL_BLK_MALLOC(chunk_image, (size_t)dst_oh_size)))
+ /* Note: we use calloc() instead of malloc() here because older versions of
+ * some messages don't initialize "unused" bytes and because we want to
+ * write out the same version of the object header and older versions of
+ * object headers aligned messages. In both those situations, it's
+ * complex and error-prone to determine all the proper ways/places to
+ * clear to zero bytes, so we just set the buffer to zero's here.
+ * (QAK - 2010/08/17)
+ */
+ if(NULL == (oh_dst->chunk[0].image = H5FL_BLK_CALLOC(chunk_image, (size_t)dst_oh_size)))
HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed")
/* Set dest. chunk information */