msan_new_delete.cc revision 2d1fdb26e458c4ddc04155c1d421bced3ba90cd0 
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
22namespace __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.
26void ReplaceOperatorsNewAndDelete() { }
27}
28
29using namespace __msan;  // NOLINT
30
31// Fake std::nothrow_t to avoid including <new>.
32namespace 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
41INTERCEPTOR_ATTRIBUTE
42void *operator new(size_t size) { OPERATOR_NEW_BODY; }
43INTERCEPTOR_ATTRIBUTE
44void *operator new[](size_t size) { OPERATOR_NEW_BODY; }
45INTERCEPTOR_ATTRIBUTE
46void *operator new(size_t size, std::nothrow_t const&) { OPERATOR_NEW_BODY; }
47INTERCEPTOR_ATTRIBUTE
48void *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
54INTERCEPTOR_ATTRIBUTE
55void operator delete(void *ptr) throw() { OPERATOR_DELETE_BODY; }
56INTERCEPTOR_ATTRIBUTE
57void operator delete[](void *ptr) throw() { OPERATOR_DELETE_BODY; }
58INTERCEPTOR_ATTRIBUTE
59void operator delete(void *ptr, std::nothrow_t const&) { OPERATOR_DELETE_BODY; }
60INTERCEPTOR_ATTRIBUTE
61void operator delete[](void *ptr, std::nothrow_t const&) {
62  OPERATOR_DELETE_BODY;
63}
64
65#endif // MSAN_REPLACE_OPERATORS_NEW_AND_DELETE
66