diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/talloc/talloc.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/lib/talloc/talloc.c b/lib/talloc/talloc.c index 3ec5d85eee..d1c88a247d 100644 --- a/lib/talloc/talloc.c +++ b/lib/talloc/talloc.c @@ -169,6 +169,23 @@ static struct { TC_INVALIDATE_SHRINK_VALGRIND_CHUNK(_tc, _new_size); \ } while (0) +#if defined(DEVELOPER) && defined(VALGRIND_MAKE_MEM_UNDEFINED) +/* Mark the new bytes as undefined */ +#define TC_UNDEFINE_GROW_VALGRIND_CHUNK(_tc, _new_size) do { \ + size_t _old_used = TC_HDR_SIZE + (_tc)->size; \ + size_t _new_used = TC_HDR_SIZE + (_new_size); \ + size_t _flen = _new_used - _old_used; \ + char *_fptr = _old_used + (char *)(_tc); \ + VALGRIND_MAKE_MEM_UNDEFINED(_fptr, _flen); \ +} while (0) +#else +#define TC_UNDEFINE_GROW_VALGRIND_CHUNK(_tc, _new_size) do { } while (0) +#endif + +#define TC_UNDEFINE_GROW_CHUNK(_tc, _new_size) do { \ + TC_UNDEFINE_GROW_VALGRIND_CHUNK(_tc, _new_size); \ +} while (0) + struct talloc_reference_handle { struct talloc_reference_handle *next, *prev; void *ptr; @@ -1387,6 +1404,8 @@ _PUBLIC_ void *_talloc_realloc(const void *context, void *ptr, size_t size, cons memmove(pool_tc->pool, tc, old_used); new_ptr = pool_tc->pool; + TC_UNDEFINE_GROW_CHUNK(tc, size); + pool_tc->pool = new_chunk_size + (char *)new_ptr; goto got_new_ptr; } @@ -1395,6 +1414,7 @@ _PUBLIC_ void *_talloc_realloc(const void *context, void *ptr, size_t size, cons } if (new_chunk_size == old_chunk_size) { + TC_UNDEFINE_GROW_CHUNK(tc, size); tc->flags &= ~TALLOC_FLAG_FREE; tc->size = size; return ptr; @@ -1409,6 +1429,7 @@ _PUBLIC_ void *_talloc_realloc(const void *context, void *ptr, size_t size, cons space_left = TC_POOL_SPACE_LEFT(pool_tc); if (space_left >= space_needed) { + TC_UNDEFINE_GROW_CHUNK(tc, size); tc->flags &= ~TALLOC_FLAG_FREE; tc->size = size; pool_tc->pool = TC_POOLMEM_NEXT_CHUNK(tc); |