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 // See also https://code.google.com/p/address-sanitizer/issues/detail?id=131.
  30 #if !ASAN_ANDROID
  31
  32 // Fake std::nothrow_t to avoid including <new>.
  33 namespace std {
  34 struct nothrow_t {};
  35 }  // namespace std
  36
  37 #define OPERATOR_NEW_BODY(type) \
  38   GET_STACK_TRACE_MALLOC;\
  39   return asan_memalign(0, size, &stack, type);
  40
  41 INTERCEPTOR_ATTRIBUTE
  42 void *operator new(size_t size) { OPERATOR_NEW_BODY(FROM_NEW); }
  43 INTERCEPTOR_ATTRIBUTE
  44 void *operator new[](size_t size) { OPERATOR_NEW_BODY(FROM_NEW_BR); }
  45 INTERCEPTOR_ATTRIBUTE
  46 void *operator new(size_t size, std::nothrow_t const&)
  47 { OPERATOR_NEW_BODY(FROM_NEW); }
  48 INTERCEPTOR_ATTRIBUTE
  49 void *operator new[](size_t size, std::nothrow_t const&)
  50 { OPERATOR_NEW_BODY(FROM_NEW_BR); }
  51
  52 #define OPERATOR_DELETE_BODY(type) \
  53   GET_STACK_TRACE_FREE;\
  54   asan_free(ptr, &stack, type);
  55
  56 INTERCEPTOR_ATTRIBUTE
  57 void operator delete(void *ptr) { OPERATOR_DELETE_BODY(FROM_NEW); }
  58 INTERCEPTOR_ATTRIBUTE
  59 void operator delete[](void *ptr) { OPERATOR_DELETE_BODY(FROM_NEW_BR); }
  60 INTERCEPTOR_ATTRIBUTE
  61 void operator delete(void *ptr, std::nothrow_t const&)
  62 { OPERATOR_DELETE_BODY(FROM_NEW); }
  63 INTERCEPTOR_ATTRIBUTE
  64 void operator delete[](void *ptr, std::nothrow_t const&)
  65 { OPERATOR_DELETE_BODY(FROM_NEW_BR); }
  66
  67 #endif