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 <stddef.h>
  18
  19 namespace __asan {
  20 // This function is a no-op. We need it to make sure that object file
  21 // with our replacements will actually be loaded from static ASan
  22 // run-time library at link-time.
  23 void ReplaceOperatorsNewAndDelete() { }
  24 }
  25
  26 using namespace __asan;  // NOLINT
  27
  28 // On Android new() goes through malloc interceptors.
  29 #if !ASAN_ANDROID
  30
  31 // Fake std::nothrow_t to avoid including <new>.
  32 namespace std {
  33 struct nothrow_t {};
  34 }  // namespace std
  35
  36 #define OPERATOR_NEW_BODY \
  37   GET_STACK_TRACE_HERE_FOR_MALLOC;\
  38   return asan_memalign(0, size, &stack);
  39
  40 INTERCEPTOR_ATTRIBUTE
  41 void *operator new(size_t size) { OPERATOR_NEW_BODY; }
  42 INTERCEPTOR_ATTRIBUTE
  43 void *operator new[](size_t size) { OPERATOR_NEW_BODY; }
  44 INTERCEPTOR_ATTRIBUTE
  45 void *operator new(size_t size, std::nothrow_t const&) { OPERATOR_NEW_BODY; }
  46 INTERCEPTOR_ATTRIBUTE
  47 void *operator new[](size_t size, std::nothrow_t const&) { OPERATOR_NEW_BODY; }
  48
  49 #define OPERATOR_DELETE_BODY \
  50   GET_STACK_TRACE_HERE_FOR_FREE(ptr);\
  51   asan_free(ptr, &stack);
  52
  53 INTERCEPTOR_ATTRIBUTE
  54 void operator delete(void *ptr) { OPERATOR_DELETE_BODY; }
  55 INTERCEPTOR_ATTRIBUTE
  56 void operator delete[](void *ptr) { OPERATOR_DELETE_BODY; }
  57 INTERCEPTOR_ATTRIBUTE
  58 void operator delete(void *ptr, std::nothrow_t const&)
  59 { OPERATOR_DELETE_BODY; }
  60 INTERCEPTOR_ATTRIBUTE
  61 void operator delete[](void *ptr, std::nothrow_t const&)
  62 { OPERATOR_DELETE_BODY; }
  63
  64 #endif