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Current File : //home/real/node-v13.0.1/deps/v8/src/sanitizer/lsan-page-allocator.cc
// Copyright 2018 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "src/sanitizer/lsan-page-allocator.h"

#include "src/base/logging.h"

#if defined(LEAK_SANITIZER)
#include <sanitizer/lsan_interface.h>
#endif

namespace v8 {
namespace base {

LsanPageAllocator::LsanPageAllocator(v8::PageAllocator* page_allocator)
    : page_allocator_(page_allocator),
      allocate_page_size_(page_allocator_->AllocatePageSize()),
      commit_page_size_(page_allocator_->CommitPageSize()) {
  DCHECK_NOT_NULL(page_allocator);
}

void* LsanPageAllocator::AllocatePages(void* hint, size_t size,
                                       size_t alignment,
                                       PageAllocator::Permission access) {
  void* result = page_allocator_->AllocatePages(hint, size, alignment, access);
#if defined(LEAK_SANITIZER)
  if (result != nullptr) {
    __lsan_register_root_region(result, size);
  }
#endif
  return result;
}

bool LsanPageAllocator::FreePages(void* address, size_t size) {
  bool result = page_allocator_->FreePages(address, size);
#if defined(LEAK_SANITIZER)
  if (result) {
    __lsan_unregister_root_region(address, size);
  }
#endif
  return result;
}

bool LsanPageAllocator::ReleasePages(void* address, size_t size,
                                     size_t new_size) {
  bool result = page_allocator_->ReleasePages(address, size, new_size);
#if defined(LEAK_SANITIZER)
  if (result) {
    __lsan_unregister_root_region(address, size);
    __lsan_register_root_region(address, new_size);
  }
#endif
  return result;
}

}  // namespace base
}  // namespace v8

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