chromium/tools/memory/partition_allocator/pa_dump_heap.cc

// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Dumps PartitionAlloc's heap into a file.

#include <sys/mman.h>
#include <sys/types.h>
#include <unistd.h>

#include <cstdlib>
#include <cstring>
#include <optional>
#include <string>

#include "base/bits.h"
#include "base/check.h"
#include "base/command_line.h"
#include "base/files/file.h"
#include "base/json/json_writer.h"
#include "base/logging.h"
#include "base/memory/page_size.h"
#include "base/memory/raw_ptr_exclusion.h"
#include "base/strings/stringprintf.h"
#include "base/thread_annotations.h"
#include "base/values.h"
#include "partition_alloc/buildflags.h"
#include "partition_alloc/in_slot_metadata.h"
#include "partition_alloc/partition_alloc_config.h"
#include "partition_alloc/partition_page.h"
#include "partition_alloc/partition_root.h"
#include "partition_alloc/thread_cache.h"
#include "third_party/snappy/src/snappy.h"
#include "tools/memory/partition_allocator/inspect_utils.h"

namespace partition_alloc::tools {

kInvalidBucketSize;
kSuperPageSize;
MetadataKind;
PartitionPageSize;
PartitionPageMetadata;
PartitionSuperPageExtentEntry;
SystemPageSize;

// See https://www.kernel.org/doc/Documentation/vm/pagemap.txt.
struct PageMapEntry { … };
static_assert …;

std::optional<PageMapEntry> EntryAtAddress(int pagemap_fd, uintptr_t address) { … }

class HeapDumper { … };

}  // namespace partition_alloc::tools

int main(int argc, char** argv) { … }