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Fix potential chunk leaks.

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Move chunk_dalloc_arena()'s implementation into chunk_dalloc_wrapper(),
so that if the dalloc hook fails, proper decommit/purge/retain cascading
occurs.  This fixes three potential chunk leaks on OOM paths, one during
dss-based chunk allocation, one during chunk header commit (currently
relevant only on Windows), and one during rtree write (e.g. if rtree
node allocation fails).

Merge chunk_purge_arena() into chunk_purge_default() (refactor, no
change to functionality).
This commit is contained in:
Jason Evans 2016-03-30 18:36:04 -07:00
parent 0bc716ae27
commit ce7c0f999b
5 changed files with 26 additions and 51 deletions
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6
include/jemalloc/internal/chunk.h
View file

@ -62,12 +62,8 @@ void *chunk_alloc_wrapper(arena_t *arena, chunk_hooks_t *chunk_hooks,
void *new_addr, size_t size, size_t alignment, bool *zero, bool *commit);
void chunk_dalloc_cache(arena_t *arena, chunk_hooks_t *chunk_hooks,
void *chunk, size_t size, bool committed);
void chunk_dalloc_arena(arena_t *arena, chunk_hooks_t *chunk_hooks,
void *chunk, size_t size, bool zeroed, bool committed);
void chunk_dalloc_wrapper(arena_t *arena, chunk_hooks_t *chunk_hooks,
void *chunk, size_t size, bool committed);
bool chunk_purge_arena(arena_t *arena, void *chunk, size_t offset,
size_t length);
void *chunk, size_t size, bool zeroed, bool committed);
bool chunk_purge_wrapper(arena_t *arena, chunk_hooks_t *chunk_hooks,
void *chunk, size_t size, size_t offset, size_t length);
bool chunk_boot(void);

2
include/jemalloc/internal/private_symbols.txt
View file

@ -152,7 +152,6 @@ chunk_alloc_dss
chunk_alloc_mmap
chunk_alloc_wrapper
chunk_boot
chunk_dalloc_arena
chunk_dalloc_cache
chunk_dalloc_mmap
chunk_dalloc_wrapper
@ -172,7 +171,6 @@ chunk_npages
chunk_postfork_child
chunk_postfork_parent
chunk_prefork
chunk_purge_arena
chunk_purge_wrapper
chunk_register
chunks_rtree