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Diffstat (limited to 'lib/hwasan/hwasan_new_delete.cpp')
-rw-r--r-- | lib/hwasan/hwasan_new_delete.cpp | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/lib/hwasan/hwasan_new_delete.cpp b/lib/hwasan/hwasan_new_delete.cpp new file mode 100644 index 000000000000..4a9c79fe41b3 --- /dev/null +++ b/lib/hwasan/hwasan_new_delete.cpp @@ -0,0 +1,66 @@ +//===-- hwasan_new_delete.cpp ---------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// +// +// This file is a part of HWAddressSanitizer. +// +// Interceptors for operators new and delete. +//===----------------------------------------------------------------------===// + +#include "hwasan.h" +#include "interception/interception.h" +#include "sanitizer_common/sanitizer_allocator.h" +#include "sanitizer_common/sanitizer_allocator_report.h" + +#if HWASAN_REPLACE_OPERATORS_NEW_AND_DELETE + +#include <stddef.h> + +using namespace __hwasan; // NOLINT + +// Fake std::nothrow_t to avoid including <new>. +namespace std { + struct nothrow_t {}; +} // namespace std + + +// TODO(alekseys): throw std::bad_alloc instead of dying on OOM. +#define OPERATOR_NEW_BODY(nothrow) \ + GET_MALLOC_STACK_TRACE; \ + void *res = hwasan_malloc(size, &stack);\ + if (!nothrow && UNLIKELY(!res)) ReportOutOfMemory(size, &stack);\ + return res + +INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE +void *operator new(size_t size) { OPERATOR_NEW_BODY(false /*nothrow*/); } +INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE +void *operator new[](size_t size) { OPERATOR_NEW_BODY(false /*nothrow*/); } +INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE +void *operator new(size_t size, std::nothrow_t const&) { + OPERATOR_NEW_BODY(true /*nothrow*/); +} +INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE +void *operator new[](size_t size, std::nothrow_t const&) { + OPERATOR_NEW_BODY(true /*nothrow*/); +} + +#define OPERATOR_DELETE_BODY \ + GET_MALLOC_STACK_TRACE; \ + if (ptr) hwasan_free(ptr, &stack) + +INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE +void operator delete(void *ptr) NOEXCEPT { OPERATOR_DELETE_BODY; } +INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE +void operator delete[](void *ptr) NOEXCEPT { OPERATOR_DELETE_BODY; } +INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE +void operator delete(void *ptr, std::nothrow_t const&) { OPERATOR_DELETE_BODY; } +INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE +void operator delete[](void *ptr, std::nothrow_t const&) { + OPERATOR_DELETE_BODY; +} + +#endif // HWASAN_REPLACE_OPERATORS_NEW_AND_DELETE |