diff options
Diffstat (limited to 'libsanitizer/asan/asan_poisoning.cc')
| -rw-r--r-- | libsanitizer/asan/asan_poisoning.cc | 44 |
1 files changed, 34 insertions, 10 deletions
diff --git a/libsanitizer/asan/asan_poisoning.cc b/libsanitizer/asan/asan_poisoning.cc index 39f74879b38..8fe2bd42bdb 100644 --- a/libsanitizer/asan/asan_poisoning.cc +++ b/libsanitizer/asan/asan_poisoning.cc @@ -67,7 +67,7 @@ void FlushUnneededASanShadowMemory(uptr p, uptr size) { uptr page_size = GetPageSizeCached(); uptr shadow_beg = RoundUpTo(MemToShadow(p), page_size); uptr shadow_end = RoundDownTo(MemToShadow(p + size), page_size); - FlushUnneededShadowMemory(shadow_beg, shadow_end - shadow_beg); + ReleaseMemoryToOS(shadow_beg, shadow_end - shadow_beg); } void AsanPoisonOrUnpoisonIntraObjectRedzone(uptr ptr, uptr size, bool poison) { @@ -100,7 +100,7 @@ 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)). @@ -115,9 +115,9 @@ void __asan_poison_memory_region(void const volatile *addr, uptr size) { ShadowSegmentEndpoint beg(beg_addr); ShadowSegmentEndpoint end(end_addr); if (beg.chunk == end.chunk) { - CHECK(beg.offset < end.offset); + CHECK_LT(beg.offset, end.offset); s8 value = beg.value; - CHECK(value == end.value); + CHECK_EQ(value, end.value); // We can only poison memory if the byte in end.offset is unaddressable. // No need to re-poison memory if it is poisoned already. if (value > 0 && value <= end.offset) { @@ -129,7 +129,7 @@ void __asan_poison_memory_region(void const volatile *addr, uptr size) { } return; } - CHECK(beg.chunk < end.chunk); + CHECK_LT(beg.chunk, end.chunk); if (beg.offset > 0) { // Mark bytes from beg.offset as unaddressable. if (beg.value == 0) { @@ -155,9 +155,9 @@ void __asan_unpoison_memory_region(void const volatile *addr, uptr size) { ShadowSegmentEndpoint beg(beg_addr); ShadowSegmentEndpoint end(end_addr); if (beg.chunk == end.chunk) { - CHECK(beg.offset < end.offset); + CHECK_LT(beg.offset, end.offset); s8 value = beg.value; - CHECK(value == end.value); + CHECK_EQ(value, end.value); // We unpoison memory bytes up to enbytes up to end.offset if it is not // unpoisoned already. if (value != 0) { @@ -165,7 +165,7 @@ void __asan_unpoison_memory_region(void const volatile *addr, uptr size) { } return; } - CHECK(beg.chunk < end.chunk); + CHECK_LT(beg.chunk, end.chunk); if (beg.offset > 0) { *beg.chunk = 0; beg.chunk++; @@ -312,6 +312,30 @@ static void PoisonAlignedStackMemory(uptr addr, uptr size, bool do_poison) { } } +void __asan_set_shadow_00(uptr addr, uptr size) { + REAL(memset)((void *)addr, 0, size); +} + +void __asan_set_shadow_f1(uptr addr, uptr size) { + REAL(memset)((void *)addr, 0xf1, size); +} + +void __asan_set_shadow_f2(uptr addr, uptr size) { + REAL(memset)((void *)addr, 0xf2, size); +} + +void __asan_set_shadow_f3(uptr addr, uptr size) { + REAL(memset)((void *)addr, 0xf3, size); +} + +void __asan_set_shadow_f5(uptr addr, uptr size) { + REAL(memset)((void *)addr, 0xf5, size); +} + +void __asan_set_shadow_f8(uptr addr, uptr size) { + REAL(memset)((void *)addr, 0xf8, size); +} + void __asan_poison_stack_memory(uptr addr, uptr size) { VReport(1, "poisoning: %p %zx\n", (void *)addr, size); PoisonAlignedStackMemory(addr, size, true); @@ -341,7 +365,7 @@ void __sanitizer_annotate_contiguous_container(const void *beg_p, &stack); } CHECK_LE(end - beg, - FIRST_32_SECOND_64(1UL << 30, 1UL << 34)); // Sanity check. + FIRST_32_SECOND_64(1UL << 30, 1ULL << 34)); // Sanity check. uptr a = RoundDownTo(Min(old_mid, new_mid), granularity); uptr c = RoundUpTo(Max(old_mid, new_mid), granularity); @@ -352,7 +376,7 @@ 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) |