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.
ReplaceOperatorsNewAndDelete()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
operator new(size_t size)40 void *operator new(size_t size) { OPERATOR_NEW_BODY; }
operator new[](size_t size)41 void *operator new[](size_t size) { OPERATOR_NEW_BODY; }
operator new(size_t size,std::nothrow_t const &)42 void *operator new(size_t size, std::nothrow_t const&) { OPERATOR_NEW_BODY; }
operator new[](size_t size,std::nothrow_t const &)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
operator delete(void * ptr)48 void operator delete(void *ptr) { OPERATOR_DELETE_BODY; }
operator delete[](void * ptr)49 void operator delete[](void *ptr) { OPERATOR_DELETE_BODY; }
operator delete(void * ptr,std::nothrow_t const &)50 void operator delete(void *ptr, std::nothrow_t const&) { OPERATOR_DELETE_BODY; }
operator delete[](void * ptr,std::nothrow_t const &)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