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try to allocate within our hint space (partially addresses issue #360)

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daan 2021-11-15 10:10:47 -08:00
parent 0560fc27c0
commit 09c658dd40
1 changed files with 1 additions and 1 deletions
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src/os.c
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@ -585,7 +585,7 @@ static mi_decl_cache_align _Atomic(uintptr_t) aligned_base;
static void* mi_os_get_aligned_hint(size_t try_alignment, size_t size) static void* mi_os_get_aligned_hint(size_t try_alignment, size_t size)
{ {
if (try_alignment == 0 || try_alignment > MI_SEGMENT_SIZE) return NULL; if (try_alignment == 0 || try_alignment > MI_SEGMENT_SIZE) return NULL;
if ((size%MI_SEGMENT_SIZE) != 0) return NULL; size = _mi_align_up(size, MI_SEGMENT_SIZE);
if (size > 1*MI_GiB) return NULL; // guarantee the chance of fixed valid address is at most 1/(KK_HINT_AREA / 1<<30) = 1/4096. if (size > 1*MI_GiB) return NULL; // guarantee the chance of fixed valid address is at most 1/(KK_HINT_AREA / 1<<30) = 1/4096.
#if (MI_SECURE>0) #if (MI_SECURE>0)
size += MI_SEGMENT_SIZE; // put in `MI_SEGMENT_SIZE` virtual gaps between hinted blocks; this splits VLA's but increases guarded areas. size += MI_SEGMENT_SIZE; // put in `MI_SEGMENT_SIZE` virtual gaps between hinted blocks; this splits VLA's but increases guarded areas.