text: //===-- msan_new_delete.cpp -----------------------------------------------===//
  //
  // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  // See https://llvm.org/LICENSE.txt for license information.
  // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  //
  //===----------------------------------------------------------------------===//
  //
  // This file is a part of MemorySanitizer.
  //
  // Interceptors for operators new and delete.
  //===----------------------------------------------------------------------===//
  
  #include "msan.h"
  #include "interception/interception.h"
  #include "sanitizer_common/sanitizer_allocator.h"
  #include "sanitizer_common/sanitizer_allocator_report.h"
  
  #if MSAN_REPLACE_OPERATORS_NEW_AND_DELETE
  
  #include <stddef.h>
  
  using namespace __msan;
  
  // Fake std::nothrow_t and std::align_val_t to avoid including <new>.
  namespace std {
    struct nothrow_t {};
    enum class align_val_t: size_t {};
  }  // namespace std
  
  
  // TODO(alekseys): throw std::bad_alloc instead of dying on OOM.
  #define OPERATOR_NEW_BODY(nothrow) \
    GET_MALLOC_STACK_TRACE; \
    void *res = msan_malloc(size, &stack);\
    if (!nothrow && UNLIKELY(!res)) ReportOutOfMemory(size, &stack);\
    return res
  #define OPERATOR_NEW_BODY_ALIGN(nothrow) \
    GET_MALLOC_STACK_TRACE;\
    void *res = msan_memalign((uptr)align, size, &stack);\
    if (!nothrow && UNLIKELY(!res)) ReportOutOfMemory(size, &stack);\
    return res;
  
  INTERCEPTOR_ATTRIBUTE
  void *operator new(size_t size) { OPERATOR_NEW_BODY(false /*nothrow*/); }
  INTERCEPTOR_ATTRIBUTE
  void *operator new[](size_t size) { OPERATOR_NEW_BODY(false /*nothrow*/); }
  INTERCEPTOR_ATTRIBUTE
  void *operator new(size_t size, std::nothrow_t const&) {
    OPERATOR_NEW_BODY(true /*nothrow*/);
  }
  INTERCEPTOR_ATTRIBUTE
  void *operator new[](size_t size, std::nothrow_t const&) {
    OPERATOR_NEW_BODY(true /*nothrow*/);
  }
  INTERCEPTOR_ATTRIBUTE
  void *operator new(size_t size, std::align_val_t align)
  { OPERATOR_NEW_BODY_ALIGN(false /*nothrow*/); }
  INTERCEPTOR_ATTRIBUTE
  void *operator new[](size_t size, std::align_val_t align)
  { OPERATOR_NEW_BODY_ALIGN(false /*nothrow*/); }
  INTERCEPTOR_ATTRIBUTE
  void *operator new(size_t size, std::align_val_t align, std::nothrow_t const&)
  { OPERATOR_NEW_BODY_ALIGN(true /*nothrow*/); }
  INTERCEPTOR_ATTRIBUTE
  void *operator new[](size_t size, std::align_val_t align, std::nothrow_t const&)
  { OPERATOR_NEW_BODY_ALIGN(true /*nothrow*/); }
  
  #define OPERATOR_DELETE_BODY \
    GET_MALLOC_STACK_TRACE; \
    if (ptr) MsanDeallocate(&stack, ptr)
  
  INTERCEPTOR_ATTRIBUTE
  void operator delete(void *ptr) NOEXCEPT { OPERATOR_DELETE_BODY; }
  INTERCEPTOR_ATTRIBUTE
  void operator delete[](void *ptr) NOEXCEPT { OPERATOR_DELETE_BODY; }
  INTERCEPTOR_ATTRIBUTE
  void operator delete(void *ptr, std::nothrow_t const&) { OPERATOR_DELETE_BODY; }
  INTERCEPTOR_ATTRIBUTE
  void operator delete[](void *ptr, std::nothrow_t const&) {
    OPERATOR_DELETE_BODY;
  }
  INTERCEPTOR_ATTRIBUTE
  void operator delete(void *ptr, size_t size) NOEXCEPT { OPERATOR_DELETE_BODY; }
  INTERCEPTOR_ATTRIBUTE
  void operator delete[](void *ptr, size_t size) NOEXCEPT
  { OPERATOR_DELETE_BODY; }
  INTERCEPTOR_ATTRIBUTE
  void operator delete(void *ptr, std::align_val_t align) NOEXCEPT
  { OPERATOR_DELETE_BODY; }
  INTERCEPTOR_ATTRIBUTE
  void operator delete[](void *ptr, std::align_val_t align) NOEXCEPT
  { OPERATOR_DELETE_BODY; }
  INTERCEPTOR_ATTRIBUTE
  void operator delete(void *ptr, std::align_val_t align, std::nothrow_t const&)
  { OPERATOR_DELETE_BODY; }
  INTERCEPTOR_ATTRIBUTE
  void operator delete[](void *ptr, std::align_val_t align, std::nothrow_t const&)
  { OPERATOR_DELETE_BODY; }
  INTERCEPTOR_ATTRIBUTE
  void operator delete(void *ptr, size_t size, std::align_val_t align) NOEXCEPT
  { OPERATOR_DELETE_BODY; }
  INTERCEPTOR_ATTRIBUTE
  void operator delete[](void *ptr, size_t size, std::align_val_t align) NOEXCEPT
  { OPERATOR_DELETE_BODY; }
  
  
  #endif // MSAN_REPLACE_OPERATORS_NEW_AND_DELETE
  