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1 //===-- tsan_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 ThreadSanitizer (TSan), a race detector.
11 //
12 // Interceptors for operators new and delete.
13 //===----------------------------------------------------------------------===//
14 #include "interception/interception.h"
15 #include "sanitizer_common/sanitizer_internal_defs.h"
16 #include "tsan_interceptors.h"
17 
18 using namespace __tsan;  // NOLINT
19 
20 namespace std {
21 struct nothrow_t {};
22 }  // namespace std
23 
24 DECLARE_REAL(void *, malloc, uptr size)
25 DECLARE_REAL(void, free, void *ptr)
26 
27 #define OPERATOR_NEW_BODY(mangled_name) \
28   if (cur_thread()->in_symbolizer) \
29     return InternalAlloc(size); \
30   void *p = 0; \
31   {  \
32     SCOPED_INTERCEPTOR_RAW(mangled_name, size); \
33     p = user_alloc(thr, pc, size); \
34   }  \
35   invoke_malloc_hook(p, size);  \
36   return p;
37 
38 SANITIZER_INTERFACE_ATTRIBUTE
39 void *operator new(__sanitizer::uptr size);
operator new(__sanitizer::uptr size)40 void *operator new(__sanitizer::uptr size) {
41   OPERATOR_NEW_BODY(_Znwm);
42 }
43 
44 SANITIZER_INTERFACE_ATTRIBUTE
45 void *operator new[](__sanitizer::uptr size);
operator new[](__sanitizer::uptr size)46 void *operator new[](__sanitizer::uptr size) {
47   OPERATOR_NEW_BODY(_Znam);
48 }
49 
50 SANITIZER_INTERFACE_ATTRIBUTE
51 void *operator new(__sanitizer::uptr size, std::nothrow_t const&);
operator new(__sanitizer::uptr size,std::nothrow_t const &)52 void *operator new(__sanitizer::uptr size, std::nothrow_t const&) {
53   OPERATOR_NEW_BODY(_ZnwmRKSt9nothrow_t);
54 }
55 
56 SANITIZER_INTERFACE_ATTRIBUTE
57 void *operator new[](__sanitizer::uptr size, std::nothrow_t const&);
operator new[](__sanitizer::uptr size,std::nothrow_t const &)58 void *operator new[](__sanitizer::uptr size, std::nothrow_t const&) {
59   OPERATOR_NEW_BODY(_ZnamRKSt9nothrow_t);
60 }
61 
62 #define OPERATOR_DELETE_BODY(mangled_name) \
63   if (ptr == 0) return;  \
64   if (cur_thread()->in_symbolizer) \
65     return InternalFree(ptr); \
66   invoke_free_hook(ptr);  \
67   SCOPED_INTERCEPTOR_RAW(mangled_name, ptr);  \
68   user_free(thr, pc, ptr);
69 
70 SANITIZER_INTERFACE_ATTRIBUTE
71 void operator delete(void *ptr) NOEXCEPT;
operator delete(void * ptr)72 void operator delete(void *ptr) NOEXCEPT {
73   OPERATOR_DELETE_BODY(_ZdlPv);
74 }
75 
76 SANITIZER_INTERFACE_ATTRIBUTE
77 void operator delete[](void *ptr) NOEXCEPT;
operator delete[](void * ptr)78 void operator delete[](void *ptr) NOEXCEPT {
79   OPERATOR_DELETE_BODY(_ZdaPv);
80 }
81 
82 SANITIZER_INTERFACE_ATTRIBUTE
83 void operator delete(void *ptr, std::nothrow_t const&);
operator delete(void * ptr,std::nothrow_t const &)84 void operator delete(void *ptr, std::nothrow_t const&) {
85   OPERATOR_DELETE_BODY(_ZdlPvRKSt9nothrow_t);
86 }
87 
88 SANITIZER_INTERFACE_ATTRIBUTE
89 void operator delete[](void *ptr, std::nothrow_t const&);
operator delete[](void * ptr,std::nothrow_t const &)90 void operator delete[](void *ptr, std::nothrow_t const&) {
91   OPERATOR_DELETE_BODY(_ZdaPvRKSt9nothrow_t);
92 }
93