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