/*
 * Copyright (C) 2020 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#pragma once

#include <unwindstack/Maps.h>
#include <unwindstack/Regs.h>

#include "thread_tree.h"

namespace simpleperf {

class UnwindMaps : public unwindstack::Maps {
 public:
  void UpdateMaps(const MapSet& map_set);

 private:
  uint64_t version_ = 0u;
  std::vector<const MapEntry*> entries_;
};

class OfflineUnwinderImpl : public OfflineUnwinder {
 public:
  OfflineUnwinderImpl(bool collect_stat) : collect_stat_(collect_stat) {
    unwindstack::Elf::SetCachingEnabled(true);
  }

  bool UnwindCallChain(const ThreadEntry& thread, const RegSet& regs, const char* stack,
                       size_t stack_size, std::vector<uint64_t>* ips,
                       std::vector<uint64_t>* sps) override;

  void LoadMetaInfo(const std::unordered_map<std::string, std::string>& info_map) override;
  unwindstack::Regs* GetBacktraceRegs(const RegSet& regs);

 private:
  bool collect_stat_;
  std::unordered_map<pid_t, UnwindMaps> cached_maps_;
  uint64_t arm64_pac_mask_ = 0;
};

}  // namespace simpleperf