diff options
Diffstat (limited to 'lib/asan/asan_poisoning.cc')
| -rw-r--r-- | lib/asan/asan_poisoning.cc | 29 |
1 files changed, 18 insertions, 11 deletions
diff --git a/lib/asan/asan_poisoning.cc b/lib/asan/asan_poisoning.cc index 569d359aa425..f77ab8780bb7 100644 --- a/lib/asan/asan_poisoning.cc +++ b/lib/asan/asan_poisoning.cc @@ -102,7 +102,7 @@ using namespace __asan; // NOLINT // that user program (un)poisons the memory it owns. It poisons memory // conservatively, and unpoisons progressively to make sure asan shadow // mapping invariant is preserved (see detailed mapping description here: -// http://code.google.com/p/address-sanitizer/wiki/AddressSanitizerAlgorithm). +// https://github.com/google/sanitizers/wiki/AddressSanitizerAlgorithm). // // * if user asks to poison region [left, right), the program poisons // at least [left, AlignDown(right)). @@ -354,7 +354,7 @@ void __sanitizer_annotate_contiguous_container(const void *beg_p, // Make a quick sanity check that we are indeed in this state. // // FIXME: Two of these three checks are disabled until we fix - // https://code.google.com/p/address-sanitizer/issues/detail?id=258. + // https://github.com/google/sanitizers/issues/258. // if (d1 != d2) // CHECK_EQ(*(u8*)MemToShadow(d1), old_mid - d1); if (a + granularity <= d1) @@ -375,10 +375,10 @@ void __sanitizer_annotate_contiguous_container(const void *beg_p, } } -int __sanitizer_verify_contiguous_container(const void *beg_p, - const void *mid_p, - const void *end_p) { - if (!flags()->detect_container_overflow) return 1; +const void *__sanitizer_contiguous_container_find_bad_address( + const void *beg_p, const void *mid_p, const void *end_p) { + if (!flags()->detect_container_overflow) + return nullptr; uptr beg = reinterpret_cast<uptr>(beg_p); uptr end = reinterpret_cast<uptr>(end_p); uptr mid = reinterpret_cast<uptr>(mid_p); @@ -395,17 +395,24 @@ int __sanitizer_verify_contiguous_container(const void *beg_p, uptr r3_end = end; for (uptr i = r1_beg; i < r1_end; i++) if (AddressIsPoisoned(i)) - return 0; + return reinterpret_cast<const void *>(i); for (uptr i = r2_beg; i < mid; i++) if (AddressIsPoisoned(i)) - return 0; + return reinterpret_cast<const void *>(i); for (uptr i = mid; i < r2_end; i++) if (!AddressIsPoisoned(i)) - return 0; + return reinterpret_cast<const void *>(i); for (uptr i = r3_beg; i < r3_end; i++) if (!AddressIsPoisoned(i)) - return 0; - return 1; + return reinterpret_cast<const void *>(i); + return nullptr; +} + +int __sanitizer_verify_contiguous_container(const void *beg_p, + const void *mid_p, + const void *end_p) { + return __sanitizer_contiguous_container_find_bad_address(beg_p, mid_p, + end_p) == nullptr; } extern "C" SANITIZER_INTERFACE_ATTRIBUTE |