1 //===-- asan_interceptors.cc ----------------------------------------------===//
3 // This file is distributed under the University of Illinois Open Source
4 // License. See LICENSE.TXT for details.
6 //===----------------------------------------------------------------------===//
8 // This file is a part of AddressSanitizer, an address sanity checker.
10 // Interceptors for operators new and delete.
11 //===----------------------------------------------------------------------===//
13 #include "asan_allocator.h"
14 #include "asan_internal.h"
15 #include "asan_stack.h"
17 #include "sanitizer_common/sanitizer_interception.h"
21 using namespace __asan
; // NOLINT
23 // This code has issues on OSX.
24 // See https://code.google.com/p/address-sanitizer/issues/detail?id=131.
26 // Fake std::nothrow_t to avoid including <new>.
31 #define OPERATOR_NEW_BODY(type) \
32 GET_STACK_TRACE_MALLOC;\
33 return asan_memalign(0, size, &stack, type);
35 // On OS X it's not enough to just provide our own 'operator new' and
36 // 'operator delete' implementations, because they're going to be in the
37 // runtime dylib, and the main executable will depend on both the runtime
38 // dylib and libstdc++, each of those'll have its implementation of new and
40 // To make sure that C++ allocation/deallocation operators are overridden on
41 // OS X we need to intercept them using their mangled names.
43 // FreeBSD prior v9.2 have wrong definition of 'size_t'.
44 // http://svnweb.freebsd.org/base?view=revision&revision=232261
45 #if SANITIZER_FREEBSD && SANITIZER_WORDSIZE == 32
46 #include <sys/param.h>
47 #if __FreeBSD_version <= 902001 // v9.2
48 #define size_t unsigned
49 #endif // __FreeBSD_version
50 #endif // SANITIZER_FREEBSD && SANITIZER_WORDSIZE == 32
53 void *operator new(size_t size
) { OPERATOR_NEW_BODY(FROM_NEW
); }
55 void *operator new[](size_t size
) { OPERATOR_NEW_BODY(FROM_NEW_BR
); }
57 void *operator new(size_t size
, std::nothrow_t
const&)
58 { OPERATOR_NEW_BODY(FROM_NEW
); }
60 void *operator new[](size_t size
, std::nothrow_t
const&)
61 { OPERATOR_NEW_BODY(FROM_NEW_BR
); }
63 #else // SANITIZER_MAC
64 INTERCEPTOR(void *, _Znwm
, size_t size
) {
65 OPERATOR_NEW_BODY(FROM_NEW
);
67 INTERCEPTOR(void *, _Znam
, size_t size
) {
68 OPERATOR_NEW_BODY(FROM_NEW_BR
);
70 INTERCEPTOR(void *, _ZnwmRKSt9nothrow_t
, size_t size
, std::nothrow_t
const&) {
71 OPERATOR_NEW_BODY(FROM_NEW
);
73 INTERCEPTOR(void *, _ZnamRKSt9nothrow_t
, size_t size
, std::nothrow_t
const&) {
74 OPERATOR_NEW_BODY(FROM_NEW_BR
);
78 #define OPERATOR_DELETE_BODY(type) \
79 GET_STACK_TRACE_FREE;\
80 asan_free(ptr, &stack, type);
84 void operator delete(void *ptr
) throw() {
85 OPERATOR_DELETE_BODY(FROM_NEW
);
88 void operator delete[](void *ptr
) throw() {
89 OPERATOR_DELETE_BODY(FROM_NEW_BR
);
92 void operator delete(void *ptr
, std::nothrow_t
const&) {
93 OPERATOR_DELETE_BODY(FROM_NEW
);
96 void operator delete[](void *ptr
, std::nothrow_t
const&) {
97 OPERATOR_DELETE_BODY(FROM_NEW_BR
);
100 #else // SANITIZER_MAC
101 INTERCEPTOR(void, _ZdlPv
, void *ptr
) {
102 OPERATOR_DELETE_BODY(FROM_NEW
);
104 INTERCEPTOR(void, _ZdaPv
, void *ptr
) {
105 OPERATOR_DELETE_BODY(FROM_NEW_BR
);
107 INTERCEPTOR(void, _ZdlPvRKSt9nothrow_t
, void *ptr
, std::nothrow_t
const&) {
108 OPERATOR_DELETE_BODY(FROM_NEW
);
110 INTERCEPTOR(void, _ZdaPvRKSt9nothrow_t
, void *ptr
, std::nothrow_t
const&) {
111 OPERATOR_DELETE_BODY(FROM_NEW_BR
);