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 #include "sanitizer_common/sanitizer_interception.h" 17 18 #if MSAN_REPLACE_OPERATORS_NEW_AND_DELETE 19 20 #include <stddef.h> 21 22 namespace __msan { 23 // This function is a no-op. We need it to make sure that object file 24 // with our replacements will actually be loaded from static MSan 25 // run-time library at link-time. 26 void ReplaceOperatorsNewAndDelete() { } 27 } 28 29 using namespace __msan; // NOLINT 30 31 // Fake std::nothrow_t to avoid including <new>. 32 namespace std { 33 struct nothrow_t {}; 34 } // namespace std 35 36 37 #define OPERATOR_NEW_BODY \ 38 GET_MALLOC_STACK_TRACE; \ 39 return MsanReallocate(&stack, 0, size, sizeof(u64), false) 40 41 INTERCEPTOR_ATTRIBUTE 42 void *operator new(size_t size) { OPERATOR_NEW_BODY; } 43 INTERCEPTOR_ATTRIBUTE 44 void *operator new[](size_t size) { OPERATOR_NEW_BODY; } 45 INTERCEPTOR_ATTRIBUTE 46 void *operator new(size_t size, std::nothrow_t const&) { OPERATOR_NEW_BODY; } 47 INTERCEPTOR_ATTRIBUTE 48 void *operator new[](size_t size, std::nothrow_t const&) { OPERATOR_NEW_BODY; } 49 50 #define OPERATOR_DELETE_BODY \ 51 GET_MALLOC_STACK_TRACE; \ 52 if (ptr) MsanDeallocate(&stack, ptr) 53 54 INTERCEPTOR_ATTRIBUTE 55 void operator delete(void *ptr) throw() { OPERATOR_DELETE_BODY; } 56 INTERCEPTOR_ATTRIBUTE 57 void operator delete[](void *ptr) throw() { OPERATOR_DELETE_BODY; } 58 INTERCEPTOR_ATTRIBUTE 59 void operator delete(void *ptr, std::nothrow_t const&) { OPERATOR_DELETE_BODY; } 60 INTERCEPTOR_ATTRIBUTE 61 void operator delete[](void *ptr, std::nothrow_t const&) { 62 OPERATOR_DELETE_BODY; 63 } 64 65 #endif // MSAN_REPLACE_OPERATORS_NEW_AND_DELETE 66
