1 //===-- msan_new_delete.cc ------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file is a part of MemorySanitizer. 11 // 12 // Interceptors for operators new and delete. 13 //===----------------------------------------------------------------------===// 14 15 #include "msan.h" 16 17 #if MSAN_REPLACE_OPERATORS_NEW_AND_DELETE 18 19 #include <stddef.h> 20 21 namespace __msan { 22 // This function is a no-op. We need it to make sure that object file 23 // with our replacements will actually be loaded from static MSan 24 // run-time library at link-time. 25 void ReplaceOperatorsNewAndDelete() { } 26 } 27 28 using namespace __msan; // NOLINT 29 30 // Fake std::nothrow_t to avoid including <new>. 31 namespace std { 32 struct nothrow_t {}; 33 } // namespace std 34 35 36 #define OPERATOR_NEW_BODY \ 37 GET_MALLOC_STACK_TRACE; \ 38 return MsanReallocate(&stack, 0, size, sizeof(u64), false) 39 40 void *operator new(size_t size) { OPERATOR_NEW_BODY; } 41 void *operator new[](size_t size) { OPERATOR_NEW_BODY; } 42 void *operator new(size_t size, std::nothrow_t const&) { OPERATOR_NEW_BODY; } 43 void *operator new[](size_t size, std::nothrow_t const&) { OPERATOR_NEW_BODY; } 44 45 #define OPERATOR_DELETE_BODY \ 46 if (ptr) MsanDeallocate(ptr) 47 48 void operator delete(void *ptr) { OPERATOR_DELETE_BODY; } 49 void operator delete[](void *ptr) { OPERATOR_DELETE_BODY; } 50 void operator delete(void *ptr, std::nothrow_t const&) { OPERATOR_DELETE_BODY; } 51 void operator delete[](void *ptr, std::nothrow_t const&) { 52 OPERATOR_DELETE_BODY; 53 } 54 55 #endif // MSAN_REPLACE_OPERATORS_NEW_AND_DELETE 56
