diff options
Diffstat (limited to 'lib/asan/asan_interceptors.cc')
| -rw-r--r-- | lib/asan/asan_interceptors.cc | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/asan/asan_interceptors.cc b/lib/asan/asan_interceptors.cc index 6ee3266062f8..905dd2e23870 100644 --- a/lib/asan/asan_interceptors.cc +++ b/lib/asan/asan_interceptors.cc @@ -37,12 +37,19 @@ namespace __asan { // Return true if we can quickly decide that the region is unpoisoned. +// We assume that a redzone is at least 16 bytes. static inline bool QuickCheckForUnpoisonedRegion(uptr beg, uptr size) { if (size == 0) return true; if (size <= 32) return !AddressIsPoisoned(beg) && !AddressIsPoisoned(beg + size - 1) && !AddressIsPoisoned(beg + size / 2); + if (size <= 64) + return !AddressIsPoisoned(beg) && + !AddressIsPoisoned(beg + size / 4) && + !AddressIsPoisoned(beg + size - 1) && + !AddressIsPoisoned(beg + 3 * size / 4) && + !AddressIsPoisoned(beg + size / 2); return false; } |