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

   1 //===-- asan_interceptors.cc ----------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This file is a part of AddressSanitizer, an address sanity checker.
  10 //
  11 // Interceptors for operators new and delete.
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "asan_allocator.h"
  15 #include "asan_internal.h"
  16 #include "asan_malloc_local.h"
  17 #include "asan_report.h"
  18 #include "asan_stack.h"
  19
  20 #include "interception/interception.h"
  21
  22 #include <stddef.h>
  23
  24 // C++ operators can't have dllexport attributes on Windows. We export them
  25 // anyway by passing extra -export flags to the linker, which is exactly that
  26 // dllexport would normally do. We need to export them in order to make the
  27 // VS2015 dynamic CRT (MD) work.
  28 #if SANITIZER_WINDOWS && defined(_MSC_VER)
  29 #define CXX_OPERATOR_ATTRIBUTE
  30 #define COMMENT_EXPORT(sym) __pragma(comment(linker, "/export:" sym))
  31 #ifdef _WIN64
  32 COMMENT_EXPORT("??2@YAPEAX_K@Z")                     // operator new
  33 COMMENT_EXPORT("??2@YAPEAX_KAEBUnothrow_t@std@@@Z")  // operator new nothrow
  34 COMMENT_EXPORT("??3@YAXPEAX@Z")                      // operator delete
  35 COMMENT_EXPORT("??3@YAXPEAX_K@Z")                    // sized operator delete
  36 COMMENT_EXPORT("??_U@YAPEAX_K@Z")                    // operator new[]
  37 COMMENT_EXPORT("??_V@YAXPEAX@Z")                     // operator delete[]
  38 #else
  39 COMMENT_EXPORT("??2@YAPAXI@Z")                    // operator new
  40 COMMENT_EXPORT("??2@YAPAXIABUnothrow_t@std@@@Z")  // operator new nothrow
  41 COMMENT_EXPORT("??3@YAXPAX@Z")                    // operator delete
  42 COMMENT_EXPORT("??3@YAXPAXI@Z")                   // sized operator delete
  43 COMMENT_EXPORT("??_U@YAPAXI@Z")                   // operator new[]
  44 COMMENT_EXPORT("??_V@YAXPAX@Z")                   // operator delete[]
  45 #endif
  46 #undef COMMENT_EXPORT
  47 #else
  48 #define CXX_OPERATOR_ATTRIBUTE INTERCEPTOR_ATTRIBUTE
  49 #endif
  50
  51 using namespace __asan;  // NOLINT
  52
  53 // FreeBSD prior v9.2 have wrong definition of 'size_t'.
  54 // http://svnweb.freebsd.org/base?view=revision&revision=232261
  55 #if SANITIZER_FREEBSD && SANITIZER_WORDSIZE == 32
  56 #include <sys/param.h>
  57 #if __FreeBSD_version <= 902001  // v9.2
  58 #define size_t unsigned
  59 #endif  // __FreeBSD_version
  60 #endif  // SANITIZER_FREEBSD && SANITIZER_WORDSIZE == 32
  61
  62 // This code has issues on OSX.
  63 // See https://github.com/google/sanitizers/issues/131.
  64
  65 // Fake std::nothrow_t and std::align_val_t to avoid including <new>.
  66 namespace std {
  67 struct nothrow_t {};
  68 enum class align_val_t: size_t {};
  69 }  // namespace std
  70
  71 // TODO(alekseyshl): throw std::bad_alloc instead of dying on OOM.
  72 // For local pool allocation, align to SHADOW_GRANULARITY to match asan
  73 // allocator behavior.
  74 #define OPERATOR_NEW_BODY(type, nothrow)            \
  75   MAYBE_ALLOCATE_FROM_LOCAL_POOL(nothrow);          \
  76   GET_STACK_TRACE_MALLOC;                           \
  77   void *res = asan_memalign(0, size, &stack, type); \
  78   if (!nothrow && UNLIKELY(!res))                   \
  79     ReportOutOfMemory(size, &stack);                \
  80   return res;
  81 #define OPERATOR_NEW_BODY_ALIGN(type, nothrow)                \
  82   MAYBE_ALLOCATE_FROM_LOCAL_POOL(nothrow);                    \
  83   GET_STACK_TRACE_MALLOC;                                     \
  84   void *res = asan_memalign((uptr)align, size, &stack, type); \
  85   if (!nothrow && UNLIKELY(!res))                             \
  86     ReportOutOfMemory(size, &stack);                          \
  87   return res;
  88
  89 // On OS X it's not enough to just provide our own 'operator new' and
  90 // 'operator delete' implementations, because they're going to be in the
  91 // runtime dylib, and the main executable will depend on both the runtime
  92 // dylib and libstdc++, each of those'll have its implementation of new and
  93 // delete.
  94 // To make sure that C++ allocation/deallocation operators are overridden on
  95 // OS X we need to intercept them using their mangled names.
  96 #if !SANITIZER_MAC
  97 CXX_OPERATOR_ATTRIBUTE
  98 void *operator new(size_t size)
  99 { OPERATOR_NEW_BODY(FROM_NEW, false /*nothrow*/); }
 100 CXX_OPERATOR_ATTRIBUTE
 101 void *operator new[](size_t size)
 102 { OPERATOR_NEW_BODY(FROM_NEW_BR, false /*nothrow*/); }
 103 CXX_OPERATOR_ATTRIBUTE
 104 void *operator new(size_t size, std::nothrow_t const&)
 105 { OPERATOR_NEW_BODY(FROM_NEW, true /*nothrow*/); }
 106 CXX_OPERATOR_ATTRIBUTE
 107 void *operator new[](size_t size, std::nothrow_t const&)
 108 { OPERATOR_NEW_BODY(FROM_NEW_BR, true /*nothrow*/); }
 109 CXX_OPERATOR_ATTRIBUTE
 110 void *operator new(size_t size, std::align_val_t align)
 111 { OPERATOR_NEW_BODY_ALIGN(FROM_NEW, false /*nothrow*/); }
 112 CXX_OPERATOR_ATTRIBUTE
 113 void *operator new[](size_t size, std::align_val_t align)
 114 { OPERATOR_NEW_BODY_ALIGN(FROM_NEW_BR, false /*nothrow*/); }
 115 CXX_OPERATOR_ATTRIBUTE
 116 void *operator new(size_t size, std::align_val_t align, std::nothrow_t const&)
 117 { OPERATOR_NEW_BODY_ALIGN(FROM_NEW, true /*nothrow*/); }
 118 CXX_OPERATOR_ATTRIBUTE
 119 void *operator new[](size_t size, std::align_val_t align, std::nothrow_t const&)
 120 { OPERATOR_NEW_BODY_ALIGN(FROM_NEW_BR, true /*nothrow*/); }
 121
 122 #else  // SANITIZER_MAC
 123 INTERCEPTOR(void *, _Znwm, size_t size) {
 124   OPERATOR_NEW_BODY(FROM_NEW, false /*nothrow*/);
 125 }
 126 INTERCEPTOR(void *, _Znam, size_t size) {
 127   OPERATOR_NEW_BODY(FROM_NEW_BR, false /*nothrow*/);
 128 }
 129 INTERCEPTOR(void *, _ZnwmRKSt9nothrow_t, size_t size, std::nothrow_t const&) {
 130   OPERATOR_NEW_BODY(FROM_NEW, true /*nothrow*/);
 131 }
 132 INTERCEPTOR(void *, _ZnamRKSt9nothrow_t, size_t size, std::nothrow_t const&) {
 133   OPERATOR_NEW_BODY(FROM_NEW_BR, true /*nothrow*/);
 134 }
 135 #endif  // !SANITIZER_MAC
 136
 137 #define OPERATOR_DELETE_BODY(type) \
 138   if (IS_FROM_LOCAL_POOL(ptr)) return;\
 139   GET_STACK_TRACE_FREE;\
 140   asan_delete(ptr, 0, 0, &stack, type);
 141
 142 #define OPERATOR_DELETE_BODY_SIZE(type) \
 143   if (IS_FROM_LOCAL_POOL(ptr)) return;\
 144   GET_STACK_TRACE_FREE;\
 145   asan_delete(ptr, size, 0, &stack, type);
 146
 147 #define OPERATOR_DELETE_BODY_ALIGN(type) \
 148   if (IS_FROM_LOCAL_POOL(ptr)) return;\
 149   GET_STACK_TRACE_FREE;\
 150   asan_delete(ptr, 0, static_cast<uptr>(align), &stack, type);
 151
 152 #define OPERATOR_DELETE_BODY_SIZE_ALIGN(type) \
 153   if (IS_FROM_LOCAL_POOL(ptr)) return;\
 154   GET_STACK_TRACE_FREE;\
 155   asan_delete(ptr, size, static_cast<uptr>(align), &stack, type);
 156
 157 #if !SANITIZER_MAC
 158 CXX_OPERATOR_ATTRIBUTE
 159 void operator delete(void *ptr) NOEXCEPT
 160 { OPERATOR_DELETE_BODY(FROM_NEW); }
 161 CXX_OPERATOR_ATTRIBUTE
 162 void operator delete[](void *ptr) NOEXCEPT
 163 { OPERATOR_DELETE_BODY(FROM_NEW_BR); }
 164 CXX_OPERATOR_ATTRIBUTE
 165 void operator delete(void *ptr, std::nothrow_t const&)
 166 { OPERATOR_DELETE_BODY(FROM_NEW); }
 167 CXX_OPERATOR_ATTRIBUTE
 168 void operator delete[](void *ptr, std::nothrow_t const&)
 169 { OPERATOR_DELETE_BODY(FROM_NEW_BR); }
 170 CXX_OPERATOR_ATTRIBUTE
 171 void operator delete(void *ptr, size_t size) NOEXCEPT
 172 { OPERATOR_DELETE_BODY_SIZE(FROM_NEW); }
 173 CXX_OPERATOR_ATTRIBUTE
 174 void operator delete[](void *ptr, size_t size) NOEXCEPT
 175 { OPERATOR_DELETE_BODY_SIZE(FROM_NEW_BR); }
 176 CXX_OPERATOR_ATTRIBUTE
 177 void operator delete(void *ptr, std::align_val_t align) NOEXCEPT
 178 { OPERATOR_DELETE_BODY_ALIGN(FROM_NEW); }
 179 CXX_OPERATOR_ATTRIBUTE
 180 void operator delete[](void *ptr, std::align_val_t align) NOEXCEPT
 181 { OPERATOR_DELETE_BODY_ALIGN(FROM_NEW_BR); }
 182 CXX_OPERATOR_ATTRIBUTE
 183 void operator delete(void *ptr, std::align_val_t align, std::nothrow_t const&)
 184 { OPERATOR_DELETE_BODY_ALIGN(FROM_NEW); }
 185 CXX_OPERATOR_ATTRIBUTE
 186 void operator delete[](void *ptr, std::align_val_t align, std::nothrow_t const&)
 187 { OPERATOR_DELETE_BODY_ALIGN(FROM_NEW_BR); }
 188 CXX_OPERATOR_ATTRIBUTE
 189 void operator delete(void *ptr, size_t size, std::align_val_t align) NOEXCEPT
 190 { OPERATOR_DELETE_BODY_SIZE_ALIGN(FROM_NEW); }
 191 CXX_OPERATOR_ATTRIBUTE
 192 void operator delete[](void *ptr, size_t size, std::align_val_t align) NOEXCEPT
 193 { OPERATOR_DELETE_BODY_SIZE_ALIGN(FROM_NEW_BR); }
 194
 195 #else  // SANITIZER_MAC
 196 INTERCEPTOR(void, _ZdlPv, void *ptr)
 197 { OPERATOR_DELETE_BODY(FROM_NEW); }
 198 INTERCEPTOR(void, _ZdaPv, void *ptr)
 199 { OPERATOR_DELETE_BODY(FROM_NEW_BR); }
 200 INTERCEPTOR(void, _ZdlPvRKSt9nothrow_t, void *ptr, std::nothrow_t const&)
 201 { OPERATOR_DELETE_BODY(FROM_NEW); }
 202 INTERCEPTOR(void, _ZdaPvRKSt9nothrow_t, void *ptr, std::nothrow_t const&)
 203 { OPERATOR_DELETE_BODY(FROM_NEW_BR); }
 204 #endif  // !SANITIZER_MAC