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jemalloc: Avoid variable length array with length 0

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Cherry-pick upstrem patch.

https://github.com/jemalloc/jemalloc/pull/1768
This commit is contained in:
kamil 2020-02-15 09:57:30 +00:00
parent 9366ffe370
commit 93a18a197a
1 changed files with 4 additions and 2 deletions
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6
external/bsd/jemalloc/dist/src/tcache.c vendored
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@ -111,7 +111,8 @@ tcache_bin_flush_small(tsd_t *tsd, tcache_t *tcache, cache_bin_t *tbin,
arena_t *arena = tcache->arena;
assert(arena != NULL);
unsigned nflush = tbin->ncached - rem;
VARIABLE_ARRAY(extent_t *, item_extent, nflush);
/* Variable length array must have > 0 length. */
VARIABLE_ARRAY(extent_t *, item_extent, nflush + + 1);
/* Look up extent once per item. */
for (unsigned i = 0 ; i < nflush; i++) {
item_extent[i] = iealloc(tsd_tsdn(tsd), *(tbin->avail - 1 - i));
@ -196,7 +197,8 @@ tcache_bin_flush_large(tsd_t *tsd, cache_bin_t *tbin, szind_t binind,
arena_t *arena = tcache->arena;
assert(arena != NULL);
unsigned nflush = tbin->ncached - rem;
VARIABLE_ARRAY(extent_t *, item_extent, nflush);
/* Variable length array must have > 0 length. */
VARIABLE_ARRAY(extent_t *, item_extent, nflush + 1);
/* Look up extent once per item. */
for (unsigned i = 0 ; i < nflush; i++) {
item_extent[i] = iealloc(tsd_tsdn(tsd), *(tbin->avail - 1 - i));