1353944Sdim//===-- msan_new_delete.cpp -----------------------------------------------===// 2353944Sdim// 3353944Sdim// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4353944Sdim// See https://llvm.org/LICENSE.txt for license information. 5353944Sdim// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6353944Sdim// 7353944Sdim//===----------------------------------------------------------------------===// 8353944Sdim// 9353944Sdim// This file is a part of MemorySanitizer. 10353944Sdim// 11353944Sdim// Interceptors for operators new and delete. 12353944Sdim//===----------------------------------------------------------------------===// 13353944Sdim 14353944Sdim#include "msan.h" 15353944Sdim#include "interception/interception.h" 16353944Sdim#include "sanitizer_common/sanitizer_allocator.h" 17353944Sdim#include "sanitizer_common/sanitizer_allocator_report.h" 18353944Sdim 19353944Sdim#if MSAN_REPLACE_OPERATORS_NEW_AND_DELETE 20353944Sdim 21353944Sdim#include <stddef.h> 22353944Sdim 23353944Sdimusing namespace __msan; 24353944Sdim 25353944Sdim// Fake std::nothrow_t and std::align_val_t to avoid including <new>. 26353944Sdimnamespace std { 27353944Sdim struct nothrow_t {}; 28353944Sdim enum class align_val_t: size_t {}; 29353944Sdim} // namespace std 30353944Sdim 31353944Sdim 32353944Sdim// TODO(alekseys): throw std::bad_alloc instead of dying on OOM. 33353944Sdim#define OPERATOR_NEW_BODY(nothrow) \ 34353944Sdim GET_MALLOC_STACK_TRACE; \ 35353944Sdim void *res = msan_malloc(size, &stack);\ 36353944Sdim if (!nothrow && UNLIKELY(!res)) ReportOutOfMemory(size, &stack);\ 37353944Sdim return res 38353944Sdim#define OPERATOR_NEW_BODY_ALIGN(nothrow) \ 39353944Sdim GET_MALLOC_STACK_TRACE;\ 40353944Sdim void *res = msan_memalign((uptr)align, size, &stack);\ 41353944Sdim if (!nothrow && UNLIKELY(!res)) ReportOutOfMemory(size, &stack);\ 42353944Sdim return res; 43353944Sdim 44353944SdimINTERCEPTOR_ATTRIBUTE 45353944Sdimvoid *operator new(size_t size) { OPERATOR_NEW_BODY(false /*nothrow*/); } 46353944SdimINTERCEPTOR_ATTRIBUTE 47353944Sdimvoid *operator new[](size_t size) { OPERATOR_NEW_BODY(false /*nothrow*/); } 48353944SdimINTERCEPTOR_ATTRIBUTE 49353944Sdimvoid *operator new(size_t size, std::nothrow_t const&) { 50353944Sdim OPERATOR_NEW_BODY(true /*nothrow*/); 51353944Sdim} 52353944SdimINTERCEPTOR_ATTRIBUTE 53353944Sdimvoid *operator new[](size_t size, std::nothrow_t const&) { 54353944Sdim OPERATOR_NEW_BODY(true /*nothrow*/); 55353944Sdim} 56353944SdimINTERCEPTOR_ATTRIBUTE 57353944Sdimvoid *operator new(size_t size, std::align_val_t align) 58353944Sdim{ OPERATOR_NEW_BODY_ALIGN(false /*nothrow*/); } 59353944SdimINTERCEPTOR_ATTRIBUTE 60353944Sdimvoid *operator new[](size_t size, std::align_val_t align) 61353944Sdim{ OPERATOR_NEW_BODY_ALIGN(false /*nothrow*/); } 62353944SdimINTERCEPTOR_ATTRIBUTE 63353944Sdimvoid *operator new(size_t size, std::align_val_t align, std::nothrow_t const&) 64353944Sdim{ OPERATOR_NEW_BODY_ALIGN(true /*nothrow*/); } 65353944SdimINTERCEPTOR_ATTRIBUTE 66353944Sdimvoid *operator new[](size_t size, std::align_val_t align, std::nothrow_t const&) 67353944Sdim{ OPERATOR_NEW_BODY_ALIGN(true /*nothrow*/); } 68353944Sdim 69353944Sdim#define OPERATOR_DELETE_BODY \ 70353944Sdim GET_MALLOC_STACK_TRACE; \ 71353944Sdim if (ptr) MsanDeallocate(&stack, ptr) 72353944Sdim 73353944SdimINTERCEPTOR_ATTRIBUTE 74353944Sdimvoid operator delete(void *ptr) NOEXCEPT { OPERATOR_DELETE_BODY; } 75353944SdimINTERCEPTOR_ATTRIBUTE 76353944Sdimvoid operator delete[](void *ptr) NOEXCEPT { OPERATOR_DELETE_BODY; } 77353944SdimINTERCEPTOR_ATTRIBUTE 78353944Sdimvoid operator delete(void *ptr, std::nothrow_t const&) { OPERATOR_DELETE_BODY; } 79353944SdimINTERCEPTOR_ATTRIBUTE 80353944Sdimvoid operator delete[](void *ptr, std::nothrow_t const&) { 81353944Sdim OPERATOR_DELETE_BODY; 82353944Sdim} 83353944SdimINTERCEPTOR_ATTRIBUTE 84353944Sdimvoid operator delete(void *ptr, size_t size) NOEXCEPT { OPERATOR_DELETE_BODY; } 85353944SdimINTERCEPTOR_ATTRIBUTE 86353944Sdimvoid operator delete[](void *ptr, size_t size) NOEXCEPT 87353944Sdim{ OPERATOR_DELETE_BODY; } 88353944SdimINTERCEPTOR_ATTRIBUTE 89353944Sdimvoid operator delete(void *ptr, std::align_val_t align) NOEXCEPT 90353944Sdim{ OPERATOR_DELETE_BODY; } 91353944SdimINTERCEPTOR_ATTRIBUTE 92353944Sdimvoid operator delete[](void *ptr, std::align_val_t align) NOEXCEPT 93353944Sdim{ OPERATOR_DELETE_BODY; } 94353944SdimINTERCEPTOR_ATTRIBUTE 95353944Sdimvoid operator delete(void *ptr, std::align_val_t align, std::nothrow_t const&) 96353944Sdim{ OPERATOR_DELETE_BODY; } 97353944SdimINTERCEPTOR_ATTRIBUTE 98353944Sdimvoid operator delete[](void *ptr, std::align_val_t align, std::nothrow_t const&) 99353944Sdim{ OPERATOR_DELETE_BODY; } 100353944SdimINTERCEPTOR_ATTRIBUTE 101353944Sdimvoid operator delete(void *ptr, size_t size, std::align_val_t align) NOEXCEPT 102353944Sdim{ OPERATOR_DELETE_BODY; } 103353944SdimINTERCEPTOR_ATTRIBUTE 104353944Sdimvoid operator delete[](void *ptr, size_t size, std::align_val_t align) NOEXCEPT 105353944Sdim{ OPERATOR_DELETE_BODY; } 106353944Sdim 107353944Sdim 108353944Sdim#endif // MSAN_REPLACE_OPERATORS_NEW_AND_DELETE 109