libsanitizer/asan/asan_new_delete.cc

   1 //===-- asan_interceptors.cc ----------------------------------------------===//
   2 //
   3 // This file is distributed under the University of Illinois Open Source
   4 // License. See LICENSE.TXT for details.
   5 //
   6 //===----------------------------------------------------------------------===//
   7 //
   8 // This file is a part of AddressSanitizer, an address sanity checker.
   9 //
  10 // Interceptors for operators new and delete.
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "asan_allocator.h"
  14 #include "asan_internal.h"
  15 #include "asan_stack.h"
  16
  17 #include "interception/interception.h"
  18
  19 #include <stddef.h>
  20
  21 // C++ operators can't have visibility attributes on Windows.
  22 #if SANITIZER_WINDOWS
  23 # define CXX_OPERATOR_ATTRIBUTE
  24 #else
  25 # define CXX_OPERATOR_ATTRIBUTE INTERCEPTOR_ATTRIBUTE
  26 #endif
  27
  28 using namespace __asan;  // NOLINT
  29
  30 // FreeBSD prior v9.2 have wrong definition of 'size_t'.
  31 // http://svnweb.freebsd.org/base?view=revision&revision=232261
  32 #if SANITIZER_FREEBSD && SANITIZER_WORDSIZE == 32
  33 #include <sys/param.h>
  34 #if __FreeBSD_version <= 902001  // v9.2
  35 #define size_t unsigned
  36 #endif  // __FreeBSD_version
  37 #endif  // SANITIZER_FREEBSD && SANITIZER_WORDSIZE == 32
  38
  39 // This code has issues on OSX.
  40 // See https://code.google.com/p/address-sanitizer/issues/detail?id=131.
  41
  42 // Fake std::nothrow_t and std::align_val_t to avoid including <new>.
  43 namespace std {
  44 struct nothrow_t {};
  45 enum class align_val_t: size_t {};
  46 }  // namespace std
  47
  48 #define OPERATOR_NEW_BODY(type) \
  49   GET_STACK_TRACE_MALLOC;\
  50   return asan_memalign(0, size, &stack, type);
  51 #define OPERATOR_NEW_BODY_ALIGN(type) \
  52   GET_STACK_TRACE_MALLOC;\
  53   return asan_memalign((uptr)align, size, &stack, type);
  54
  55 // On OS X it's not enough to just provide our own 'operator new' and
  56 // 'operator delete' implementations, because they're going to be in the
  57 // runtime dylib, and the main executable will depend on both the runtime
  58 // dylib and libstdc++, each of those'll have its implementation of new and
  59 // delete.
  60 // To make sure that C++ allocation/deallocation operators are overridden on
  61 // OS X we need to intercept them using their mangled names.
  62 #if !SANITIZER_MAC
  63 CXX_OPERATOR_ATTRIBUTE
  64 void *operator new(size_t size) { OPERATOR_NEW_BODY(FROM_NEW); }
  65 CXX_OPERATOR_ATTRIBUTE
  66 void *operator new[](size_t size) { OPERATOR_NEW_BODY(FROM_NEW_BR); }
  67 CXX_OPERATOR_ATTRIBUTE
  68 void *operator new(size_t size, std::nothrow_t const&)
  69 { OPERATOR_NEW_BODY(FROM_NEW); }
  70 CXX_OPERATOR_ATTRIBUTE
  71 void *operator new[](size_t size, std::nothrow_t const&)
  72 { OPERATOR_NEW_BODY(FROM_NEW_BR); }
  73 CXX_OPERATOR_ATTRIBUTE
  74 void *operator new(size_t size, std::align_val_t align)
  75 { OPERATOR_NEW_BODY_ALIGN(FROM_NEW); }
  76 CXX_OPERATOR_ATTRIBUTE
  77 void *operator new[](size_t size, std::align_val_t align)
  78 { OPERATOR_NEW_BODY_ALIGN(FROM_NEW_BR); }
  79 CXX_OPERATOR_ATTRIBUTE
  80 void *operator new(size_t size, std::align_val_t align, std::nothrow_t const&)
  81 { OPERATOR_NEW_BODY_ALIGN(FROM_NEW); }
  82 CXX_OPERATOR_ATTRIBUTE
  83 void *operator new[](size_t size, std::align_val_t align, std::nothrow_t const&)
  84 { OPERATOR_NEW_BODY_ALIGN(FROM_NEW_BR); }
  85
  86 #else  // SANITIZER_MAC
  87 INTERCEPTOR(void *, _Znwm, size_t size) {
  88   OPERATOR_NEW_BODY(FROM_NEW);
  89 }
  90 INTERCEPTOR(void *, _Znam, size_t size) {
  91   OPERATOR_NEW_BODY(FROM_NEW_BR);
  92 }
  93 INTERCEPTOR(void *, _ZnwmRKSt9nothrow_t, size_t size, std::nothrow_t const&) {
  94   OPERATOR_NEW_BODY(FROM_NEW);
  95 }
  96 INTERCEPTOR(void *, _ZnamRKSt9nothrow_t, size_t size, std::nothrow_t const&) {
  97   OPERATOR_NEW_BODY(FROM_NEW_BR);
  98 }
  99 #endif
 100
 101 #define OPERATOR_DELETE_BODY(type) \
 102   GET_STACK_TRACE_FREE;\
 103   asan_free(ptr, &stack, type);
 104
 105 #if !SANITIZER_MAC
 106 CXX_OPERATOR_ATTRIBUTE
 107 void operator delete(void *ptr) NOEXCEPT {
 108   OPERATOR_DELETE_BODY(FROM_NEW);
 109 }
 110 CXX_OPERATOR_ATTRIBUTE
 111 void operator delete[](void *ptr) NOEXCEPT {
 112   OPERATOR_DELETE_BODY(FROM_NEW_BR);
 113 }
 114 CXX_OPERATOR_ATTRIBUTE
 115 void operator delete(void *ptr, std::nothrow_t const&) {
 116   OPERATOR_DELETE_BODY(FROM_NEW);
 117 }
 118 CXX_OPERATOR_ATTRIBUTE
 119 void operator delete[](void *ptr, std::nothrow_t const&) {
 120   OPERATOR_DELETE_BODY(FROM_NEW_BR);
 121 }
 122 CXX_OPERATOR_ATTRIBUTE
 123 void operator delete(void *ptr, size_t size) NOEXCEPT {
 124   GET_STACK_TRACE_FREE;
 125   asan_sized_free(ptr, size, &stack, FROM_NEW);
 126 }
 127 CXX_OPERATOR_ATTRIBUTE
 128 void operator delete[](void *ptr, size_t size) NOEXCEPT {
 129   GET_STACK_TRACE_FREE;
 130   asan_sized_free(ptr, size, &stack, FROM_NEW_BR);
 131 }
 132 CXX_OPERATOR_ATTRIBUTE
 133 void operator delete(void *ptr, std::align_val_t) NOEXCEPT {
 134   OPERATOR_DELETE_BODY(FROM_NEW);
 135 }
 136 CXX_OPERATOR_ATTRIBUTE
 137 void operator delete[](void *ptr, std::align_val_t) NOEXCEPT {
 138   OPERATOR_DELETE_BODY(FROM_NEW_BR);
 139 }
 140 CXX_OPERATOR_ATTRIBUTE
 141 void operator delete(void *ptr, std::align_val_t, std::nothrow_t const&) {
 142   OPERATOR_DELETE_BODY(FROM_NEW);
 143 }
 144 CXX_OPERATOR_ATTRIBUTE
 145 void operator delete[](void *ptr, std::align_val_t, std::nothrow_t const&) {
 146   OPERATOR_DELETE_BODY(FROM_NEW_BR);
 147 }
 148 CXX_OPERATOR_ATTRIBUTE
 149 void operator delete(void *ptr, size_t size, std::align_val_t) NOEXCEPT {
 150   GET_STACK_TRACE_FREE;
 151   asan_sized_free(ptr, size, &stack, FROM_NEW);
 152 }
 153 CXX_OPERATOR_ATTRIBUTE
 154 void operator delete[](void *ptr, size_t size, std::align_val_t) NOEXCEPT {
 155   GET_STACK_TRACE_FREE;
 156   asan_sized_free(ptr, size, &stack, FROM_NEW_BR);
 157 }
 158
 159 #else  // SANITIZER_MAC
 160 INTERCEPTOR(void, _ZdlPv, void *ptr) {
 161   OPERATOR_DELETE_BODY(FROM_NEW);
 162 }
 163 INTERCEPTOR(void, _ZdaPv, void *ptr) {
 164   OPERATOR_DELETE_BODY(FROM_NEW_BR);
 165 }
 166 INTERCEPTOR(void, _ZdlPvRKSt9nothrow_t, void *ptr, std::nothrow_t const&) {
 167   OPERATOR_DELETE_BODY(FROM_NEW);
 168 }
 169 INTERCEPTOR(void, _ZdaPvRKSt9nothrow_t, void *ptr, std::nothrow_t const&) {
 170   OPERATOR_DELETE_BODY(FROM_NEW_BR);
 171 }
 172 #endif