compiler-rt/lib/nsan/nsan_new_delete.cpp

   1 //===-- nsan_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 "interception/interception.h"
  15 #include "nsan.h"
  16 #include "nsan_allocator.h"
  17 #include "sanitizer_common/sanitizer_allocator.h"
  18 #include "sanitizer_common/sanitizer_allocator_report.h"
  19
  20 #include <stddef.h>
  21
  22 using namespace __nsan;
  23
  24 // Fake std::nothrow_t and std::align_val_t to avoid including <new>.
  25 namespace std {
  26 struct nothrow_t {};
  27 enum class align_val_t : size_t {};
  28 } // namespace std
  29
  30 #define OPERATOR_NEW_BODY(nothrow)                                             \
  31   void *res = nsan_malloc(size);                                               \
  32   if (!nothrow && UNLIKELY(!res)) {                                            \
  33     BufferedStackTrace stack;                                                  \
  34     GET_FATAL_STACK_TRACE_IF_EMPTY(&stack);                                    \
  35     ReportOutOfMemory(size, &stack);                                           \
  36   }                                                                            \
  37   return res
  38 #define OPERATOR_NEW_BODY_ALIGN(nothrow)                                       \
  39   void *res = nsan_memalign((uptr)align, size);                                \
  40   if (!nothrow && UNLIKELY(!res)) {                                            \
  41     BufferedStackTrace stack;                                                  \
  42     GET_FATAL_STACK_TRACE_IF_EMPTY(&stack);                                    \
  43     ReportOutOfMemory(size, &stack);                                           \
  44   }                                                                            \
  45   return res;
  46
  47 INTERCEPTOR_ATTRIBUTE
  48 void *operator new(size_t size) { OPERATOR_NEW_BODY(/*nothrow=*/false); }
  49 INTERCEPTOR_ATTRIBUTE
  50 void *operator new[](size_t size) { OPERATOR_NEW_BODY(/*nothrow=*/false); }
  51 INTERCEPTOR_ATTRIBUTE
  52 void *operator new(size_t size, std::nothrow_t const &) {
  53   OPERATOR_NEW_BODY(/*nothrow=*/true);
  54 }
  55 INTERCEPTOR_ATTRIBUTE
  56 void *operator new[](size_t size, std::nothrow_t const &) {
  57   OPERATOR_NEW_BODY(/*nothrow=*/true);
  58 }
  59 INTERCEPTOR_ATTRIBUTE
  60 void *operator new(size_t size, std::align_val_t align) {
  61   OPERATOR_NEW_BODY_ALIGN(/*nothrow=*/false);
  62 }
  63 INTERCEPTOR_ATTRIBUTE
  64 void *operator new[](size_t size, std::align_val_t align) {
  65   OPERATOR_NEW_BODY_ALIGN(/*nothrow=*/false);
  66 }
  67 INTERCEPTOR_ATTRIBUTE
  68 void *operator new(size_t size, std::align_val_t align,
  69                    std::nothrow_t const &) {
  70   OPERATOR_NEW_BODY_ALIGN(/*nothrow=*/true);
  71 }
  72 INTERCEPTOR_ATTRIBUTE
  73 void *operator new[](size_t size, std::align_val_t align,
  74                      std::nothrow_t const &) {
  75   OPERATOR_NEW_BODY_ALIGN(/*nothrow=*/true);
  76 }
  77
  78 #define OPERATOR_DELETE_BODY                                                   \
  79   if (ptr)                                                                     \
  80   NsanDeallocate(ptr)
  81
  82 INTERCEPTOR_ATTRIBUTE
  83 void operator delete(void *ptr) NOEXCEPT { OPERATOR_DELETE_BODY; }
  84 INTERCEPTOR_ATTRIBUTE
  85 void operator delete[](void *ptr) NOEXCEPT { OPERATOR_DELETE_BODY; }
  86 INTERCEPTOR_ATTRIBUTE
  87 void operator delete(void *ptr, std::nothrow_t const &) {
  88   OPERATOR_DELETE_BODY;
  89 }
  90 INTERCEPTOR_ATTRIBUTE
  91 void operator delete[](void *ptr, std::nothrow_t const &) {
  92   OPERATOR_DELETE_BODY;
  93 }
  94 INTERCEPTOR_ATTRIBUTE
  95 void operator delete(void *ptr, size_t size) NOEXCEPT { OPERATOR_DELETE_BODY; }
  96 INTERCEPTOR_ATTRIBUTE
  97 void operator delete[](void *ptr, size_t size) NOEXCEPT {
  98   OPERATOR_DELETE_BODY;
  99 }
 100 INTERCEPTOR_ATTRIBUTE
 101 void operator delete(void *ptr, std::align_val_t align) NOEXCEPT {
 102   OPERATOR_DELETE_BODY;
 103 }
 104 INTERCEPTOR_ATTRIBUTE
 105 void operator delete[](void *ptr, std::align_val_t align) NOEXCEPT {
 106   OPERATOR_DELETE_BODY;
 107 }
 108 INTERCEPTOR_ATTRIBUTE
 109 void operator delete(void *ptr, std::align_val_t align,
 110                      std::nothrow_t const &) {
 111   OPERATOR_DELETE_BODY;
 112 }
 113 INTERCEPTOR_ATTRIBUTE
 114 void operator delete[](void *ptr, std::align_val_t align,
 115                        std::nothrow_t const &) {
 116   OPERATOR_DELETE_BODY;
 117 }
 118 INTERCEPTOR_ATTRIBUTE
 119 void operator delete(void *ptr, size_t size, std::align_val_t align) NOEXCEPT {
 120   OPERATOR_DELETE_BODY;
 121 }
 122 INTERCEPTOR_ATTRIBUTE
 123 void operator delete[](void *ptr, size_t size,
 124                        std::align_val_t align) NOEXCEPT {
 125   OPERATOR_DELETE_BODY;
 126 }