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[ASan] Remove the call to GetPageSizeCached from fast path of FastPoisonShadow 

llvm-svn: 217194
This commit is contained in:
Alexey Samsonov 2014-09-04 20:47:27 +00:00
parent c2e09253bd
commit f537aeaea1
1 changed files with 3 additions and 3 deletions
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6
compiler-rt/lib/asan/asan_poisoning.h
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@ -35,7 +35,6 @@ void PoisonShadowPartialRightRedzone(uptr addr,
ALWAYS_INLINE void FastPoisonShadow(uptr aligned_beg, uptr aligned_size,
u8 value) {
DCHECK(flags()->poison_heap);
uptr PageSize = GetPageSizeCached();
uptr shadow_beg = MEM_TO_SHADOW(aligned_beg);
uptr shadow_end = MEM_TO_SHADOW(
aligned_beg + aligned_size - SHADOW_GRANULARITY) + 1;
@ -48,8 +47,9 @@ ALWAYS_INLINE void FastPoisonShadow(uptr aligned_beg, uptr aligned_size,
shadow_end - shadow_beg < common_flags()->clear_shadow_mmap_threshold) {
REAL(memset)((void*)shadow_beg, value, shadow_end - shadow_beg);
} else {
uptr page_beg = RoundUpTo(shadow_beg, PageSize);
uptr page_end = RoundDownTo(shadow_end, PageSize);
uptr page_size = GetPageSizeCached();
uptr page_beg = RoundUpTo(shadow_beg, page_size);
uptr page_end = RoundDownTo(shadow_end, page_size);
if (page_beg >= page_end) {
REAL(memset)((void *)shadow_beg, 0, shadow_end - shadow_beg);