1 //===-- hwasan_new_delete.cpp ---------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // This file is a part of HWAddressSanitizer. 10 // 11 // Interceptors for operators new and delete. 12 //===----------------------------------------------------------------------===// 13 14 #include "hwasan.h" 15 #include "interception/interception.h" 16 #include "sanitizer_common/sanitizer_allocator.h" 17 #include "sanitizer_common/sanitizer_allocator_report.h" 18 19 #if HWASAN_REPLACE_OPERATORS_NEW_AND_DELETE 20 21 #include <stddef.h> 22 23 using namespace __hwasan; 24 25 // Fake std::nothrow_t to avoid including <new>. 26 namespace std { 27 struct nothrow_t {}; 28 } // namespace std 29 30 31 // TODO(alekseys): throw std::bad_alloc instead of dying on OOM. 32 #define OPERATOR_NEW_BODY(nothrow) \ 33 GET_MALLOC_STACK_TRACE; \ 34 void *res = hwasan_malloc(size, &stack);\ 35 if (!nothrow && UNLIKELY(!res)) ReportOutOfMemory(size, &stack);\ 36 return res 37 38 INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE 39 void *operator new(size_t size) { OPERATOR_NEW_BODY(false /*nothrow*/); } 40 INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE 41 void *operator new[](size_t size) { OPERATOR_NEW_BODY(false /*nothrow*/); } 42 INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE 43 void *operator new(size_t size, std::nothrow_t const&) { 44 OPERATOR_NEW_BODY(true /*nothrow*/); 45 } 46 INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE 47 void *operator new[](size_t size, std::nothrow_t const&) { 48 OPERATOR_NEW_BODY(true /*nothrow*/); 49 } 50 51 #define OPERATOR_DELETE_BODY \ 52 GET_MALLOC_STACK_TRACE; \ 53 if (ptr) hwasan_free(ptr, &stack) 54 55 INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE 56 void operator delete(void *ptr) NOEXCEPT { OPERATOR_DELETE_BODY; } 57 INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE 58 void operator delete[](void *ptr) NOEXCEPT { OPERATOR_DELETE_BODY; } 59 INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE 60 void operator delete(void *ptr, std::nothrow_t const&) { OPERATOR_DELETE_BODY; } 61 INTERCEPTOR_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE 62 void operator delete[](void *ptr, std::nothrow_t const&) { 63 OPERATOR_DELETE_BODY; 64 } 65 66 #endif // HWASAN_REPLACE_OPERATORS_NEW_AND_DELETE 67