project-base/server-skynet-source-3rd-jemalloc
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Make *allocx() size class overflow behavior defined.

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Limit supported size and alignment to HUGE_MAXCLASS, which in turn is
now limited to be less than PTRDIFF_MAX.

This resolves #278 and #295.
This commit is contained in:
Jason Evans
2016-02-25 15:29:49 -08:00
parent 767d85061a
commit 0c516a00c4
14 changed files with 247 additions and 89 deletions
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10
include/jemalloc/internal/tcache.h
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@@ -344,7 +344,6 @@ tcache_alloc_large(tsd_t *tsd, arena_t *arena, tcache_t *tcache, size_t size,
void *ret;
tcache_bin_t *tbin;
bool tcache_success;
size_t usize JEMALLOC_CC_SILENCE_INIT(0);
assert(binind < nhbins);
tbin = &tcache->tbins[binind];
@@ -359,14 +358,15 @@ tcache_alloc_large(tsd_t *tsd, arena_t *arena, tcache_t *tcache, size_t size,
if (unlikely(arena == NULL))
return (NULL);
usize = index2size(binind);
assert(usize <= tcache_maxclass);
ret = arena_malloc_large(tsd, arena, usize, binind, zero);
ret = arena_malloc_large(tsd, arena, binind, zero);
if (ret == NULL)
return (NULL);
} else {
size_t usize JEMALLOC_CC_SILENCE_INIT(0);
/* Only compute usize on demand */
if (config_prof || (slow_path && config_fill) || unlikely(zero)) {
if (config_prof || (slow_path && config_fill) ||
unlikely(zero)) {
usize = index2size(binind);
assert(usize <= tcache_maxclass);
}