lib/msan/msan_new_delete.cc

   1 //===-- msan_new_delete.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 MemorySanitizer.
  11 //
  12 // Interceptors for operators new and delete.
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "msan.h"
  16 #include "sanitizer_common/sanitizer_interception.h"
  17
  18 #if MSAN_REPLACE_OPERATORS_NEW_AND_DELETE
  19
  20 #include <stddef.h>
  21
  22 namespace __msan {
  23 // This function is a no-op. We need it to make sure that object file
  24 // with our replacements will actually be loaded from static MSan
  25 // run-time library at link-time.
  26 void ReplaceOperatorsNewAndDelete() { }
  27 }
  28
  29 using namespace __msan;  // NOLINT
  30
  31 // Fake std::nothrow_t to avoid including <new>.
  32 namespace std {
  33   struct nothrow_t {};
  34 }  // namespace std
  35
  36
  37 #define OPERATOR_NEW_BODY \
  38   GET_MALLOC_STACK_TRACE; \
  39   return MsanReallocate(&stack, 0, size, sizeof(u64), false)
  40
  41 INTERCEPTOR_ATTRIBUTE
  42 void *operator new(size_t size) { OPERATOR_NEW_BODY; }
  43 INTERCEPTOR_ATTRIBUTE
  44 void *operator new[](size_t size) { OPERATOR_NEW_BODY; }
  45 INTERCEPTOR_ATTRIBUTE
  46 void *operator new(size_t size, std::nothrow_t const&) { OPERATOR_NEW_BODY; }
  47 INTERCEPTOR_ATTRIBUTE
  48 void *operator new[](size_t size, std::nothrow_t const&) { OPERATOR_NEW_BODY; }
  49
  50 #define OPERATOR_DELETE_BODY \
  51   GET_MALLOC_STACK_TRACE; \
  52   if (ptr) MsanDeallocate(&stack, ptr)
  53
  54 INTERCEPTOR_ATTRIBUTE
  55 void operator delete(void *ptr) throw() { OPERATOR_DELETE_BODY; }
  56 INTERCEPTOR_ATTRIBUTE
  57 void operator delete[](void *ptr) throw() { OPERATOR_DELETE_BODY; }
  58 INTERCEPTOR_ATTRIBUTE
  59 void operator delete(void *ptr, std::nothrow_t const&) { OPERATOR_DELETE_BODY; }
  60 INTERCEPTOR_ATTRIBUTE
  61 void operator delete[](void *ptr, std::nothrow_t const&) {
  62   OPERATOR_DELETE_BODY;
  63 }
  64
  65 #endif // MSAN_REPLACE_OPERATORS_NEW_AND_DELETE