contrib/compiler-rt/lib/asan/asan_new_delete.cc

   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 "interception/interception.h"
  20
  21 #include <stddef.h>
  22
  23 // C++ operators can't have dllexport attributes on Windows. We export them
  24 // anyway by passing extra -export flags to the linker, which is exactly that
  25 // dllexport would normally do. We need to export them in order to make the
  26 // VS2015 dynamic CRT (MD) work.
  27 #if SANITIZER_WINDOWS
  28 #define CXX_OPERATOR_ATTRIBUTE
  29 #define COMMENT_EXPORT(sym) __pragma(comment(linker, "/export:" sym))
  30 #ifdef _WIN64
  31 COMMENT_EXPORT("??2@YAPEAX_K@Z")                     // operator new
  32 COMMENT_EXPORT("??2@YAPEAX_KAEBUnothrow_t@std@@@Z")  // operator new nothrow
  33 COMMENT_EXPORT("??3@YAXPEAX@Z")                      // operator delete
  34 COMMENT_EXPORT("??3@YAXPEAX_K@Z")                    // sized operator delete
  35 COMMENT_EXPORT("??_U@YAPEAX_K@Z")                    // operator new[]
  36 COMMENT_EXPORT("??_V@YAXPEAX@Z")                     // operator delete[]
  37 #else
  38 COMMENT_EXPORT("??2@YAPAXI@Z")                    // operator new
  39 COMMENT_EXPORT("??2@YAPAXIABUnothrow_t@std@@@Z")  // operator new nothrow
  40 COMMENT_EXPORT("??3@YAXPAX@Z")                    // operator delete
  41 COMMENT_EXPORT("??3@YAXPAXI@Z")                   // sized operator delete
  42 COMMENT_EXPORT("??_U@YAPAXI@Z")                   // operator new[]
  43 COMMENT_EXPORT("??_V@YAXPAX@Z")                   // operator delete[]
  44 #endif
  45 #undef COMMENT_EXPORT
  46 #else
  47 #define CXX_OPERATOR_ATTRIBUTE INTERCEPTOR_ATTRIBUTE
  48 #endif
  49
  50 using namespace __asan;  // NOLINT
  51
  52 // FreeBSD prior v9.2 have wrong definition of 'size_t'.
  53 // http://svnweb.freebsd.org/base?view=revision&revision=232261
  54 #if SANITIZER_FREEBSD && SANITIZER_WORDSIZE == 32
  55 #include <sys/param.h>
  56 #if __FreeBSD_version <= 902001  // v9.2
  57 #define size_t unsigned
  58 #endif  // __FreeBSD_version
  59 #endif  // SANITIZER_FREEBSD && SANITIZER_WORDSIZE == 32
  60
  61 // This code has issues on OSX.
  62 // See https://github.com/google/sanitizers/issues/131.
  63
  64 // Fake std::nothrow_t and std::align_val_t to avoid including <new>.
  65 namespace std {
  66 struct nothrow_t {};
  67 enum class align_val_t: size_t {};
  68 }  // namespace std
  69
  70 // TODO(alekseys): throw std::bad_alloc instead of dying on OOM.
  71 #define OPERATOR_NEW_BODY(type, nothrow) \
  72   GET_STACK_TRACE_MALLOC;\
  73   void *res = asan_memalign(0, size, &stack, type);\
  74   if (!nothrow && UNLIKELY(!res)) DieOnFailure::OnOOM();\
  75   return res;
  76 #define OPERATOR_NEW_BODY_ALIGN(type, nothrow) \
  77   GET_STACK_TRACE_MALLOC;\
  78   void *res = asan_memalign((uptr)align, size, &stack, type);\
  79   if (!nothrow && UNLIKELY(!res)) DieOnFailure::OnOOM();\
  80   return res;
  81
  82 // On OS X it's not enough to just provide our own 'operator new' and
  83 // 'operator delete' implementations, because they're going to be in the
  84 // runtime dylib, and the main executable will depend on both the runtime
  85 // dylib and libstdc++, each of those'll have its implementation of new and
  86 // delete.
  87 // To make sure that C++ allocation/deallocation operators are overridden on
  88 // OS X we need to intercept them using their mangled names.
  89 #if !SANITIZER_MAC
  90 CXX_OPERATOR_ATTRIBUTE
  91 void *operator new(size_t size)
  92 { OPERATOR_NEW_BODY(FROM_NEW, false /*nothrow*/); }
  93 CXX_OPERATOR_ATTRIBUTE
  94 void *operator new[](size_t size)
  95 { OPERATOR_NEW_BODY(FROM_NEW_BR, false /*nothrow*/); }
  96 CXX_OPERATOR_ATTRIBUTE
  97 void *operator new(size_t size, std::nothrow_t const&)
  98 { OPERATOR_NEW_BODY(FROM_NEW, true /*nothrow*/); }
  99 CXX_OPERATOR_ATTRIBUTE
 100 void *operator new[](size_t size, std::nothrow_t const&)
 101 { OPERATOR_NEW_BODY(FROM_NEW_BR, true /*nothrow*/); }
 102 CXX_OPERATOR_ATTRIBUTE
 103 void *operator new(size_t size, std::align_val_t align)
 104 { OPERATOR_NEW_BODY_ALIGN(FROM_NEW, false /*nothrow*/); }
 105 CXX_OPERATOR_ATTRIBUTE
 106 void *operator new[](size_t size, std::align_val_t align)
 107 { OPERATOR_NEW_BODY_ALIGN(FROM_NEW_BR, false /*nothrow*/); }
 108 CXX_OPERATOR_ATTRIBUTE
 109 void *operator new(size_t size, std::align_val_t align, std::nothrow_t const&)
 110 { OPERATOR_NEW_BODY_ALIGN(FROM_NEW, true /*nothrow*/); }
 111 CXX_OPERATOR_ATTRIBUTE
 112 void *operator new[](size_t size, std::align_val_t align, std::nothrow_t const&)
 113 { OPERATOR_NEW_BODY_ALIGN(FROM_NEW_BR, true /*nothrow*/); }
 114
 115 #else  // SANITIZER_MAC
 116 INTERCEPTOR(void *, _Znwm, size_t size) {
 117   OPERATOR_NEW_BODY(FROM_NEW, false /*nothrow*/);
 118 }
 119 INTERCEPTOR(void *, _Znam, size_t size) {
 120   OPERATOR_NEW_BODY(FROM_NEW_BR, false /*nothrow*/);
 121 }
 122 INTERCEPTOR(void *, _ZnwmRKSt9nothrow_t, size_t size, std::nothrow_t const&) {
 123   OPERATOR_NEW_BODY(FROM_NEW, true /*nothrow*/);
 124 }
 125 INTERCEPTOR(void *, _ZnamRKSt9nothrow_t, size_t size, std::nothrow_t const&) {
 126   OPERATOR_NEW_BODY(FROM_NEW_BR, true /*nothrow*/);
 127 }
 128 #endif  // !SANITIZER_MAC
 129
 130 #define OPERATOR_DELETE_BODY(type) \
 131   GET_STACK_TRACE_FREE;\
 132   asan_delete(ptr, 0, 0, &stack, type);
 133
 134 #define OPERATOR_DELETE_BODY_SIZE(type) \
 135   GET_STACK_TRACE_FREE;\
 136   asan_delete(ptr, size, 0, &stack, type);
 137
 138 #define OPERATOR_DELETE_BODY_ALIGN(type) \
 139   GET_STACK_TRACE_FREE;\
 140   asan_delete(ptr, 0, static_cast<uptr>(align), &stack, type);
 141
 142 #define OPERATOR_DELETE_BODY_SIZE_ALIGN(type) \
 143   GET_STACK_TRACE_FREE;\
 144   asan_delete(ptr, size, static_cast<uptr>(align), &stack, type);
 145
 146 #if !SANITIZER_MAC
 147 CXX_OPERATOR_ATTRIBUTE
 148 void operator delete(void *ptr) NOEXCEPT
 149 { OPERATOR_DELETE_BODY(FROM_NEW); }
 150 CXX_OPERATOR_ATTRIBUTE
 151 void operator delete[](void *ptr) NOEXCEPT
 152 { OPERATOR_DELETE_BODY(FROM_NEW_BR); }
 153 CXX_OPERATOR_ATTRIBUTE
 154 void operator delete(void *ptr, std::nothrow_t const&)
 155 { OPERATOR_DELETE_BODY(FROM_NEW); }
 156 CXX_OPERATOR_ATTRIBUTE
 157 void operator delete[](void *ptr, std::nothrow_t const&)
 158 { OPERATOR_DELETE_BODY(FROM_NEW_BR); }
 159 CXX_OPERATOR_ATTRIBUTE
 160 void operator delete(void *ptr, size_t size) NOEXCEPT
 161 { OPERATOR_DELETE_BODY_SIZE(FROM_NEW); }
 162 CXX_OPERATOR_ATTRIBUTE
 163 void operator delete[](void *ptr, size_t size) NOEXCEPT
 164 { OPERATOR_DELETE_BODY_SIZE(FROM_NEW_BR); }
 165 CXX_OPERATOR_ATTRIBUTE
 166 void operator delete(void *ptr, std::align_val_t align) NOEXCEPT
 167 { OPERATOR_DELETE_BODY_ALIGN(FROM_NEW); }
 168 CXX_OPERATOR_ATTRIBUTE
 169 void operator delete[](void *ptr, std::align_val_t align) NOEXCEPT
 170 { OPERATOR_DELETE_BODY_ALIGN(FROM_NEW_BR); }
 171 CXX_OPERATOR_ATTRIBUTE
 172 void operator delete(void *ptr, std::align_val_t align, std::nothrow_t const&)
 173 { OPERATOR_DELETE_BODY_ALIGN(FROM_NEW); }
 174 CXX_OPERATOR_ATTRIBUTE
 175 void operator delete[](void *ptr, std::align_val_t align, std::nothrow_t const&)
 176 { OPERATOR_DELETE_BODY_ALIGN(FROM_NEW_BR); }
 177 CXX_OPERATOR_ATTRIBUTE
 178 void operator delete(void *ptr, size_t size, std::align_val_t align) NOEXCEPT
 179 { OPERATOR_DELETE_BODY_SIZE_ALIGN(FROM_NEW); }
 180 CXX_OPERATOR_ATTRIBUTE
 181 void operator delete[](void *ptr, size_t size, std::align_val_t align) NOEXCEPT
 182 { OPERATOR_DELETE_BODY_SIZE_ALIGN(FROM_NEW_BR); }
 183
 184 #else  // SANITIZER_MAC
 185 INTERCEPTOR(void, _ZdlPv, void *ptr)
 186 { OPERATOR_DELETE_BODY(FROM_NEW); }
 187 INTERCEPTOR(void, _ZdaPv, void *ptr)
 188 { OPERATOR_DELETE_BODY(FROM_NEW_BR); }
 189 INTERCEPTOR(void, _ZdlPvRKSt9nothrow_t, void *ptr, std::nothrow_t const&)
 190 { OPERATOR_DELETE_BODY(FROM_NEW); }
 191 INTERCEPTOR(void, _ZdaPvRKSt9nothrow_t, void *ptr, std::nothrow_t const&)
 192 { OPERATOR_DELETE_BODY(FROM_NEW_BR); }
 193 #endif  // !SANITIZER_MAC