diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/backend/utils/sort/logtape.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/src/backend/utils/sort/logtape.c b/src/backend/utils/sort/logtape.c index 6b7c10bcfca..66bfcced8d7 100644 --- a/src/backend/utils/sort/logtape.c +++ b/src/backend/utils/sort/logtape.c @@ -86,6 +86,7 @@ #include "storage/buffile.h" #include "utils/builtins.h" #include "utils/logtape.h" +#include "utils/memdebug.h" #include "utils/memutils.h" /* @@ -874,6 +875,17 @@ LogicalTapeFreeze(LogicalTapeSet *lts, int tapenum, TapeShare *share) */ if (lt->dirty) { + /* + * As long as we've filled the buffer at least once, its contents are + * entirely defined from valgrind's point of view, even though + * contents beyond the current end point may be stale. But it's + * possible - at least in the case of a parallel sort - to sort such + * small amount of data that we do not fill the buffer even once. Tell + * valgrind that its contents are defined, so it doesn't bleat. + */ + VALGRIND_MAKE_MEM_DEFINED(lt->buffer + lt->nbytes, + lt->buffer_size - lt->nbytes); + TapeBlockSetNBytes(lt->buffer, lt->nbytes); ltsWriteBlock(lts, lt->curBlockNumber, (void *) lt->buffer); lt->writing = false; |