diff options
Diffstat (limited to 'lib/asan/asan_fake_stack.cc')
| -rw-r--r-- | lib/asan/asan_fake_stack.cc | 32 |
1 files changed, 28 insertions, 4 deletions
diff --git a/lib/asan/asan_fake_stack.cc b/lib/asan/asan_fake_stack.cc index 4d830f4af..c7f13c731 100644 --- a/lib/asan/asan_fake_stack.cc +++ b/lib/asan/asan_fake_stack.cc @@ -104,7 +104,7 @@ FakeFrame *FakeStack::Allocate(uptr stack_size_log, uptr class_id, return 0; // We are out of fake stack. } -uptr FakeStack::AddrIsInFakeStack(uptr ptr) { +uptr FakeStack::AddrIsInFakeStack(uptr ptr, uptr *frame_beg, uptr *frame_end) { uptr stack_size_log = this->stack_size_log(); uptr beg = reinterpret_cast<uptr>(GetFrame(stack_size_log, 0, 0)); uptr end = reinterpret_cast<uptr>(this) + RequiredSize(stack_size_log); @@ -114,7 +114,10 @@ uptr FakeStack::AddrIsInFakeStack(uptr ptr) { CHECK_LE(base, ptr); CHECK_LT(ptr, base + (1UL << stack_size_log)); uptr pos = (ptr - base) >> (kMinStackFrameSizeLog + class_id); - return base + pos * BytesInSizeClass(class_id); + uptr res = base + pos * BytesInSizeClass(class_id); + *frame_end = res + BytesInSizeClass(class_id); + *frame_beg = res + sizeof(FakeFrame); + return res; } void FakeStack::HandleNoReturn() { @@ -208,14 +211,15 @@ ALWAYS_INLINE void OnFree(uptr ptr, uptr class_id, uptr size, uptr real_stack) { } // namespace __asan // ---------------------- Interface ---------------- {{{1 +using namespace __asan; #define DEFINE_STACK_MALLOC_FREE_WITH_CLASS_ID(class_id) \ extern "C" SANITIZER_INTERFACE_ATTRIBUTE uptr \ __asan_stack_malloc_##class_id(uptr size, uptr real_stack) { \ - return __asan::OnMalloc(class_id, size, real_stack); \ + return OnMalloc(class_id, size, real_stack); \ } \ extern "C" SANITIZER_INTERFACE_ATTRIBUTE void __asan_stack_free_##class_id( \ uptr ptr, uptr size, uptr real_stack) { \ - __asan::OnFree(ptr, class_id, size, real_stack); \ + OnFree(ptr, class_id, size, real_stack); \ } DEFINE_STACK_MALLOC_FREE_WITH_CLASS_ID(0) @@ -229,3 +233,23 @@ DEFINE_STACK_MALLOC_FREE_WITH_CLASS_ID(7) DEFINE_STACK_MALLOC_FREE_WITH_CLASS_ID(8) DEFINE_STACK_MALLOC_FREE_WITH_CLASS_ID(9) DEFINE_STACK_MALLOC_FREE_WITH_CLASS_ID(10) +extern "C" { +SANITIZER_INTERFACE_ATTRIBUTE +void *__asan_get_current_fake_stack() { return GetFakeStackFast(); } + +SANITIZER_INTERFACE_ATTRIBUTE +void *__asan_addr_is_in_fake_stack(void *fake_stack, void *addr, void **beg, + void **end) { + FakeStack *fs = reinterpret_cast<FakeStack*>(fake_stack); + if (!fs) return 0; + uptr frame_beg, frame_end; + FakeFrame *frame = reinterpret_cast<FakeFrame *>(fs->AddrIsInFakeStack( + reinterpret_cast<uptr>(addr), &frame_beg, &frame_end)); + if (!frame) return 0; + if (frame->magic != kCurrentStackFrameMagic) + return 0; + if (beg) *beg = reinterpret_cast<void*>(frame_beg); + if (end) *end = reinterpret_cast<void*>(frame_end); + return reinterpret_cast<void*>(frame->real_stack); +} +} // extern "C" |