87   ShadowSegmentEndpoint beg(beg_addr);  in __asan_poison_memory_region()  local
89   if (beg.chunk == end.chunk) {  in __asan_poison_memory_region()
90     CHECK(beg.offset < end.offset);  in __asan_poison_memory_region()
91     s8 value = beg.value;  in __asan_poison_memory_region()
96       if (beg.offset > 0) {  in __asan_poison_memory_region()
97         *beg.chunk = Min(value, beg.offset);  in __asan_poison_memory_region()
99         *beg.chunk = kAsanUserPoisonedMemoryMagic;  in __asan_poison_memory_region()
104   CHECK(beg.chunk < end.chunk);  in __asan_poison_memory_region()
105   if (beg.offset > 0) {  in __asan_poison_memory_region()
107     if (beg.value == 0) {  in __asan_poison_memory_region()
108       *beg.chunk = beg.offset;  in __asan_poison_memory_region()
110       *beg.chunk = Min(beg.value, beg.offset);  in __asan_poison_memory_region()
112     beg.chunk++;  in __asan_poison_memory_region()
114   REAL(memset)(beg.chunk, kAsanUserPoisonedMemoryMagic, end.chunk - beg.chunk);  in __asan_poison_memory_region()
129   ShadowSegmentEndpoint beg(beg_addr);  in __asan_unpoison_memory_region()  local
131   if (beg.chunk == end.chunk) {  in __asan_unpoison_memory_region()
132     CHECK(beg.offset < end.offset);  in __asan_unpoison_memory_region()
133     s8 value = beg.value;  in __asan_unpoison_memory_region()
138       *beg.chunk = Max(value, end.offset);  in __asan_unpoison_memory_region()
142   CHECK(beg.chunk < end.chunk);  in __asan_unpoison_memory_region()
143   if (beg.offset > 0) {  in __asan_unpoison_memory_region()
144     *beg.chunk = 0;  in __asan_unpoison_memory_region()
145     beg.chunk++;  in __asan_unpoison_memory_region()
147   REAL(memset)(beg.chunk, 0, end.chunk - beg.chunk);  in __asan_unpoison_memory_region()
157 uptr __asan_region_is_poisoned(uptr beg, uptr size) {  in __asan_region_is_poisoned()  argument
159   uptr end = beg + size;  in __asan_region_is_poisoned()
160   if (!AddrIsInMem(beg)) return beg;  in __asan_region_is_poisoned()
162   uptr aligned_b = RoundUpTo(beg, SHADOW_GRANULARITY);  in __asan_region_is_poisoned()
169   if (!__asan::AddressIsPoisoned(beg) &&  in __asan_region_is_poisoned()
177   for (; beg < end; beg++)  in __asan_region_is_poisoned()
178     if (__asan::AddressIsPoisoned(beg))  in __asan_region_is_poisoned()
179       return beg;  in __asan_region_is_poisoned()