asan_new_delete.cc revision 1.1.1.1 
1//===-- asan_interceptors.cc ----------------------------------------------===//
2//
3// This file is distributed under the University of Illinois Open Source
4// License. See LICENSE.TXT for details.
5//
6//===----------------------------------------------------------------------===//
7//
8// This file is a part of AddressSanitizer, an address sanity checker.
9//
10// Interceptors for operators new and delete.
11//===----------------------------------------------------------------------===//
12
13#include "asan_allocator.h"
14#include "asan_internal.h"
15#include "asan_stack.h"
16
17#include <stddef.h>
18
19namespace __asan {
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 ASan
22// run-time library at link-time.
23void ReplaceOperatorsNewAndDelete() { }
24}
25
26using namespace __asan;  // NOLINT
27
28// On Android new() goes through malloc interceptors.
29// See also https://code.google.com/p/address-sanitizer/issues/detail?id=131.
30#if !ASAN_ANDROID
31
32// Fake std::nothrow_t to avoid including <new>.
33namespace std {
34struct nothrow_t {};
35}  // namespace std
36
37#define OPERATOR_NEW_BODY(type) \
38  GET_STACK_TRACE_MALLOC;\
39  return asan_memalign(0, size, &stack, type);
40
41INTERCEPTOR_ATTRIBUTE
42void *operator new(size_t size) { OPERATOR_NEW_BODY(FROM_NEW); }
43INTERCEPTOR_ATTRIBUTE
44void *operator new[](size_t size) { OPERATOR_NEW_BODY(FROM_NEW_BR); }
45INTERCEPTOR_ATTRIBUTE
46void *operator new(size_t size, std::nothrow_t const&)
47{ OPERATOR_NEW_BODY(FROM_NEW); }
48INTERCEPTOR_ATTRIBUTE
49void *operator new[](size_t size, std::nothrow_t const&)
50{ OPERATOR_NEW_BODY(FROM_NEW_BR); }
51
52#define OPERATOR_DELETE_BODY(type) \
53  GET_STACK_TRACE_FREE;\
54  asan_free(ptr, &stack, type);
55
56INTERCEPTOR_ATTRIBUTE
57void operator delete(void *ptr) { OPERATOR_DELETE_BODY(FROM_NEW); }
58INTERCEPTOR_ATTRIBUTE
59void operator delete[](void *ptr) { OPERATOR_DELETE_BODY(FROM_NEW_BR); }
60INTERCEPTOR_ATTRIBUTE
61void operator delete(void *ptr, std::nothrow_t const&)
62{ OPERATOR_DELETE_BODY(FROM_NEW); }
63INTERCEPTOR_ATTRIBUTE
64void operator delete[](void *ptr, std::nothrow_t const&)
65{ OPERATOR_DELETE_BODY(FROM_NEW_BR); }
66
67#endif
68