asan_new_delete.cc revision fe6d91684bcda766593800f6307233f1a33d31f6 
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#if !ASAN_ANDROID
32
33// Fake std::nothrow_t to avoid including <new>.
34namespace std {
35struct nothrow_t {};
36}  // namespace std
37
38#define OPERATOR_NEW_BODY(type) \
39  GET_STACK_TRACE_MALLOC;\
40  return asan_memalign(0, size, &stack, type);
41
42INTERCEPTOR_ATTRIBUTE
43void *operator new(size_t size) { OPERATOR_NEW_BODY(FROM_NEW); }
44INTERCEPTOR_ATTRIBUTE
45void *operator new[](size_t size) { OPERATOR_NEW_BODY(FROM_NEW_BR); }
46INTERCEPTOR_ATTRIBUTE
47void *operator new(size_t size, std::nothrow_t const&)
48{ OPERATOR_NEW_BODY(FROM_NEW); }
49INTERCEPTOR_ATTRIBUTE
50void *operator new[](size_t size, std::nothrow_t const&)
51{ OPERATOR_NEW_BODY(FROM_NEW_BR); }
52
53#define OPERATOR_DELETE_BODY(type) \
54  GET_STACK_TRACE_FREE;\
55  asan_free(ptr, &stack, type);
56
57INTERCEPTOR_ATTRIBUTE
58void operator delete(void *ptr) { OPERATOR_DELETE_BODY(FROM_NEW); }
59INTERCEPTOR_ATTRIBUTE
60void operator delete[](void *ptr) { OPERATOR_DELETE_BODY(FROM_NEW_BR); }
61INTERCEPTOR_ATTRIBUTE
62void operator delete(void *ptr, std::nothrow_t const&)
63{ OPERATOR_DELETE_BODY(FROM_NEW); }
64INTERCEPTOR_ATTRIBUTE
65void operator delete[](void *ptr, std::nothrow_t const&)
66{ OPERATOR_DELETE_BODY(FROM_NEW_BR); }
67
68#endif
69