contrib/compiler-rt/lib/hwasan/hwasan_new_delete.cc

   1 //===-- hwasan_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 HWAddressSanitizer.
  11 //
  12 // Interceptors for operators new and delete.
  13 //===----------------------------------------------------------------------===//
  14
  15 #include "hwasan.h"
  16 #include "interception/interception.h"
  17 #include "sanitizer_common/sanitizer_allocator.h"
  18
  19 #if HWASAN_REPLACE_OPERATORS_NEW_AND_DELETE
  20
  21 #include <stddef.h>
  22
  23 using namespace __hwasan;  // NOLINT
  24
  25 // Fake std::nothrow_t to avoid including <new>.
  26 namespace std {
  27   struct nothrow_t {};
  28 }  // namespace std
  29
  30
  31 // TODO(alekseys): throw std::bad_alloc instead of dying on OOM.
  32 #define OPERATOR_NEW_BODY(nothrow) \
  33   GET_MALLOC_STACK_TRACE; \
  34   void *res = hwasan_malloc(size, &stack);\
  35   if (!nothrow && UNLIKELY(!res)) DieOnFailure::OnOOM();\
  36   return res
  37
  38 INTERCEPTOR_ATTRIBUTE
  39 void *operator new(size_t size) { OPERATOR_NEW_BODY(false /*nothrow*/); }
  40 INTERCEPTOR_ATTRIBUTE
  41 void *operator new[](size_t size) { OPERATOR_NEW_BODY(false /*nothrow*/); }
  42 INTERCEPTOR_ATTRIBUTE
  43 void *operator new(size_t size, std::nothrow_t const&) {
  44   OPERATOR_NEW_BODY(true /*nothrow*/);
  45 }
  46 INTERCEPTOR_ATTRIBUTE
  47 void *operator new[](size_t size, std::nothrow_t const&) {
  48   OPERATOR_NEW_BODY(true /*nothrow*/);
  49 }
  50
  51 #define OPERATOR_DELETE_BODY \
  52   GET_MALLOC_STACK_TRACE; \
  53   if (ptr) HwasanDeallocate(&stack, ptr)
  54
  55 INTERCEPTOR_ATTRIBUTE
  56 void operator delete(void *ptr) NOEXCEPT { OPERATOR_DELETE_BODY; }
  57 INTERCEPTOR_ATTRIBUTE
  58 void operator delete[](void *ptr) NOEXCEPT { OPERATOR_DELETE_BODY; }
  59 INTERCEPTOR_ATTRIBUTE
  60 void operator delete(void *ptr, std::nothrow_t const&) { OPERATOR_DELETE_BODY; }
  61 INTERCEPTOR_ATTRIBUTE
  62 void operator delete[](void *ptr, std::nothrow_t const&) {
  63   OPERATOR_DELETE_BODY;
  64 }
  65
  66 #endif // HWASAN_REPLACE_OPERATORS_NEW_AND_DELETE