| //===-- dfsan_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 DataflowSanitizer. |
| // |
| // Interceptors for operators new and delete. |
| //===----------------------------------------------------------------------===// |
| |
| #include <stddef.h> |
| |
| #include "dfsan.h" |
| #include "interception/interception.h" |
| #include "sanitizer_common/sanitizer_allocator.h" |
| #include "sanitizer_common/sanitizer_allocator_report.h" |
| |
| using namespace __dfsan; |
| |
| // Fake std::nothrow_t and std::align_val_t to avoid including <new>. |
| namespace std { |
| struct nothrow_t {}; |
| enum class align_val_t : size_t {}; |
| } // namespace std |
| |
| // TODO(alekseys): throw std::bad_alloc instead of dying on OOM. |
| #define OPERATOR_NEW_BODY(nothrow) \ |
| void *res = dfsan_malloc(size); \ |
| if (!nothrow && UNLIKELY(!res)) { \ |
| BufferedStackTrace stack; \ |
| ReportOutOfMemory(size, &stack); \ |
| } \ |
| return res |
| #define OPERATOR_NEW_BODY_ALIGN(nothrow) \ |
| void *res = dfsan_memalign((uptr)align, size); \ |
| if (!nothrow && UNLIKELY(!res)) { \ |
| BufferedStackTrace stack; \ |
| ReportOutOfMemory(size, &stack); \ |
| } \ |
| return res; |
| |
| INTERCEPTOR_ATTRIBUTE |
| void *operator new(size_t size) { OPERATOR_NEW_BODY(false /*nothrow*/); } |
| INTERCEPTOR_ATTRIBUTE |
| void *operator new[](size_t size) { OPERATOR_NEW_BODY(false /*nothrow*/); } |
| INTERCEPTOR_ATTRIBUTE |
| void *operator new(size_t size, std::nothrow_t const &) { |
| OPERATOR_NEW_BODY(true /*nothrow*/); |
| } |
| INTERCEPTOR_ATTRIBUTE |
| void *operator new[](size_t size, std::nothrow_t const &) { |
| OPERATOR_NEW_BODY(true /*nothrow*/); |
| } |
| INTERCEPTOR_ATTRIBUTE |
| void *operator new(size_t size, std::align_val_t align) { |
| OPERATOR_NEW_BODY_ALIGN(false /*nothrow*/); |
| } |
| INTERCEPTOR_ATTRIBUTE |
| void *operator new[](size_t size, std::align_val_t align) { |
| OPERATOR_NEW_BODY_ALIGN(false /*nothrow*/); |
| } |
| INTERCEPTOR_ATTRIBUTE |
| void *operator new(size_t size, std::align_val_t align, |
| std::nothrow_t const &) { |
| OPERATOR_NEW_BODY_ALIGN(true /*nothrow*/); |
| } |
| INTERCEPTOR_ATTRIBUTE |
| void *operator new[](size_t size, std::align_val_t align, |
| std::nothrow_t const &) { |
| OPERATOR_NEW_BODY_ALIGN(true /*nothrow*/); |
| } |
| |
| #define OPERATOR_DELETE_BODY \ |
| if (ptr) \ |
| dfsan_deallocate(ptr) |
| |
| INTERCEPTOR_ATTRIBUTE |
| void operator delete(void *ptr)NOEXCEPT { OPERATOR_DELETE_BODY; } |
| INTERCEPTOR_ATTRIBUTE |
| void operator delete[](void *ptr) NOEXCEPT { OPERATOR_DELETE_BODY; } |
| INTERCEPTOR_ATTRIBUTE |
| void operator delete(void *ptr, std::nothrow_t const &) { |
| OPERATOR_DELETE_BODY; |
| } |
| INTERCEPTOR_ATTRIBUTE |
| void operator delete[](void *ptr, std::nothrow_t const &) { |
| OPERATOR_DELETE_BODY; |
| } |
| INTERCEPTOR_ATTRIBUTE |
| void operator delete(void *ptr, size_t size)NOEXCEPT { OPERATOR_DELETE_BODY; } |
| INTERCEPTOR_ATTRIBUTE |
| void operator delete[](void *ptr, size_t size) NOEXCEPT { |
| OPERATOR_DELETE_BODY; |
| } |
| INTERCEPTOR_ATTRIBUTE |
| void operator delete(void *ptr, std::align_val_t align)NOEXCEPT { |
| OPERATOR_DELETE_BODY; |
| } |
| INTERCEPTOR_ATTRIBUTE |
| void operator delete[](void *ptr, std::align_val_t align) NOEXCEPT { |
| OPERATOR_DELETE_BODY; |
| } |
| INTERCEPTOR_ATTRIBUTE |
| void operator delete(void *ptr, std::align_val_t align, |
| std::nothrow_t const &) { |
| OPERATOR_DELETE_BODY; |
| } |
| INTERCEPTOR_ATTRIBUTE |
| void operator delete[](void *ptr, std::align_val_t align, |
| std::nothrow_t const &) { |
| OPERATOR_DELETE_BODY; |
| } |
| INTERCEPTOR_ATTRIBUTE |
| void operator delete(void *ptr, size_t size, std::align_val_t align)NOEXCEPT { |
| OPERATOR_DELETE_BODY; |
| } |
| INTERCEPTOR_ATTRIBUTE |
| void operator delete[](void *ptr, size_t size, |
| std::align_val_t align) NOEXCEPT { |
| OPERATOR_DELETE_BODY; |
| } |