compiler-rt/lib/msan/msan_new_delete.cpp

   1 //===-- msan_new_delete.cpp -----------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This file is a part of MemorySanitizer.
  10 //
  11 // Interceptors for operators new and delete.
  12 //===----------------------------------------------------------------------===//
  13
  14 #include "msan.h"
  15 #include "interception/interception.h"
  16 #include "sanitizer_common/sanitizer_allocator.h"
  17 #include "sanitizer_common/sanitizer_allocator_report.h"
  18
  19 #if MSAN_REPLACE_OPERATORS_NEW_AND_DELETE
  20
  21 #include <stddef.h>
  22
  23 using namespace __msan;
  24
  25 // Fake std::nothrow_t and std::align_val_t to avoid including <new>.
  26 namespace std {
  27   struct nothrow_t {};
  28   enum class align_val_t: size_t {};
  29 }  // namespace std
  30
  31
  32 // TODO(alekseys): throw std::bad_alloc instead of dying on OOM.
  33 #define OPERATOR_NEW_BODY(nothrow) \
  34   GET_MALLOC_STACK_TRACE; \
  35   void *res = msan_malloc(size, &stack);\
  36   if (!nothrow && UNLIKELY(!res)) ReportOutOfMemory(size, &stack);\
  37   return res
  38 #define OPERATOR_NEW_BODY_ALIGN(nothrow) \
  39   GET_MALLOC_STACK_TRACE;\
  40   void *res = msan_memalign((uptr)align, size, &stack);\
  41   if (!nothrow && UNLIKELY(!res)) ReportOutOfMemory(size, &stack);\
  42   return res;
  43
  44 INTERCEPTOR_ATTRIBUTE
  45 void *operator new(size_t size) { OPERATOR_NEW_BODY(false /*nothrow*/); }
  46 INTERCEPTOR_ATTRIBUTE
  47 void *operator new[](size_t size) { OPERATOR_NEW_BODY(false /*nothrow*/); }
  48 INTERCEPTOR_ATTRIBUTE
  49 void *operator new(size_t size, std::nothrow_t const&) {
  50   OPERATOR_NEW_BODY(true /*nothrow*/);
  51 }
  52 INTERCEPTOR_ATTRIBUTE
  53 void *operator new[](size_t size, std::nothrow_t const&) {
  54   OPERATOR_NEW_BODY(true /*nothrow*/);
  55 }
  56 INTERCEPTOR_ATTRIBUTE
  57 void *operator new(size_t size, std::align_val_t align)
  58 { OPERATOR_NEW_BODY_ALIGN(false /*nothrow*/); }
  59 INTERCEPTOR_ATTRIBUTE
  60 void *operator new[](size_t size, std::align_val_t align)
  61 { OPERATOR_NEW_BODY_ALIGN(false /*nothrow*/); }
  62 INTERCEPTOR_ATTRIBUTE
  63 void *operator new(size_t size, std::align_val_t align, std::nothrow_t const&)
  64 { OPERATOR_NEW_BODY_ALIGN(true /*nothrow*/); }
  65 INTERCEPTOR_ATTRIBUTE
  66 void *operator new[](size_t size, std::align_val_t align, std::nothrow_t const&)
  67 { OPERATOR_NEW_BODY_ALIGN(true /*nothrow*/); }
  68
  69 #define OPERATOR_DELETE_BODY \
  70   GET_MALLOC_STACK_TRACE; \
  71   if (ptr) MsanDeallocate(&stack, ptr)
  72
  73 INTERCEPTOR_ATTRIBUTE
  74 void operator delete(void *ptr) NOEXCEPT { OPERATOR_DELETE_BODY; }
  75 INTERCEPTOR_ATTRIBUTE
  76 void operator delete[](void *ptr) NOEXCEPT { OPERATOR_DELETE_BODY; }
  77 INTERCEPTOR_ATTRIBUTE
  78 void operator delete(void *ptr, std::nothrow_t const&) { OPERATOR_DELETE_BODY; }
  79 INTERCEPTOR_ATTRIBUTE
  80 void operator delete[](void *ptr, std::nothrow_t const&) {
  81   OPERATOR_DELETE_BODY;
  82 }
  83 INTERCEPTOR_ATTRIBUTE
  84 void operator delete(void *ptr, size_t size) NOEXCEPT { OPERATOR_DELETE_BODY; }
  85 INTERCEPTOR_ATTRIBUTE
  86 void operator delete[](void *ptr, size_t size) NOEXCEPT
  87 { OPERATOR_DELETE_BODY; }
  88 INTERCEPTOR_ATTRIBUTE
  89 void operator delete(void *ptr, std::align_val_t align) NOEXCEPT
  90 { OPERATOR_DELETE_BODY; }
  91 INTERCEPTOR_ATTRIBUTE
  92 void operator delete[](void *ptr, std::align_val_t align) NOEXCEPT
  93 { OPERATOR_DELETE_BODY; }
  94 INTERCEPTOR_ATTRIBUTE
  95 void operator delete(void *ptr, std::align_val_t align, std::nothrow_t const&)
  96 { OPERATOR_DELETE_BODY; }
  97 INTERCEPTOR_ATTRIBUTE
  98 void operator delete[](void *ptr, std::align_val_t align, std::nothrow_t const&)
  99 { OPERATOR_DELETE_BODY; }
 100 INTERCEPTOR_ATTRIBUTE
 101 void operator delete(void *ptr, size_t size, std::align_val_t align) NOEXCEPT
 102 { OPERATOR_DELETE_BODY; }
 103 INTERCEPTOR_ATTRIBUTE
 104 void operator delete[](void *ptr, size_t size, std::align_val_t align) NOEXCEPT
 105 { OPERATOR_DELETE_BODY; }
 106
 107
 108 #endif // MSAN_REPLACE_OPERATORS_NEW_AND_DELETE