asan_new_delete.cc revision ed4c034955e33b999b37f735feec8a7c315a6e3d 
1//===-- asan_interceptors.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 AddressSanitizer, an address sanity checker.
11//
12// Interceptors for operators new and delete.
13//===----------------------------------------------------------------------===//
14
15#include "asan_allocator.h"
16#include "asan_internal.h"
17#include "asan_stack.h"
18
19#include <stddef.h>
20
21namespace __asan {
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 ASan
24// run-time library at link-time.
25void ReplaceOperatorsNewAndDelete() { }
26}
27
28using namespace __asan;  // NOLINT
29
30// On Android new() goes through malloc interceptors.
31// See also https://code.google.com/p/address-sanitizer/issues/detail?id=131.
32#if !ASAN_ANDROID
33
34// Fake std::nothrow_t to avoid including <new>.
35namespace std {
36struct nothrow_t {};
37}  // namespace std
38
39#define OPERATOR_NEW_BODY(type) \
40  GET_STACK_TRACE_MALLOC;\
41  return asan_memalign(0, size, &stack, type);
42
43INTERCEPTOR_ATTRIBUTE
44void *operator new(size_t size) { OPERATOR_NEW_BODY(FROM_NEW); }
45INTERCEPTOR_ATTRIBUTE
46void *operator new[](size_t size) { OPERATOR_NEW_BODY(FROM_NEW_BR); }
47INTERCEPTOR_ATTRIBUTE
48void *operator new(size_t size, std::nothrow_t const&)
49{ OPERATOR_NEW_BODY(FROM_NEW); }
50INTERCEPTOR_ATTRIBUTE
51void *operator new[](size_t size, std::nothrow_t const&)
52{ OPERATOR_NEW_BODY(FROM_NEW_BR); }
53
54#define OPERATOR_DELETE_BODY(type) \
55  GET_STACK_TRACE_FREE;\
56  asan_free(ptr, &stack, type);
57
58INTERCEPTOR_ATTRIBUTE
59void operator delete(void *ptr) { OPERATOR_DELETE_BODY(FROM_NEW); }
60INTERCEPTOR_ATTRIBUTE
61void operator delete[](void *ptr) { OPERATOR_DELETE_BODY(FROM_NEW_BR); }
62INTERCEPTOR_ATTRIBUTE
63void operator delete(void *ptr, std::nothrow_t const&)
64{ OPERATOR_DELETE_BODY(FROM_NEW); }
65INTERCEPTOR_ATTRIBUTE
66void operator delete[](void *ptr, std::nothrow_t const&)
67{ OPERATOR_DELETE_BODY(FROM_NEW_BR); }
68
69#endif
70