// Copyright 2020 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// ArcvmKernelCollector handles crashes of the Linux kernel for ARCVM. When the
// ARCVM kernel crashes, it generates the crash log at
// /sys/fs/pstore/dmesg-ramoops-0 in ARCVM. The content of this file can be
// obtained from a ring buffer in /home/root/<hash>/crosvm/*.pstore file in
// Chrome OS. ArcvmKernelCollector receives the content of
// /sys/fs/pstore/dmesg-ramoops-0 and convert it for crash_sender.

#ifndef CRASH_REPORTER_ARCVM_KERNEL_COLLECTOR_H_
#define CRASH_REPORTER_ARCVM_KERNEL_COLLECTOR_H_

#include <string>

#include <base/files/scoped_file.h>
#include <gtest/gtest_prod.h>  // for FRIEND_TEST

#include "crash-reporter/arc_util.h"
#include "crash-reporter/crash_collector.h"

// Collector for kernel crashes of ARCVM.
class ArcvmKernelCollector : public CrashCollector {
 public:
  ArcvmKernelCollector();
  ~ArcvmKernelCollector() override;

  // Handles a kernel crash of ARCVM.
  bool HandleCrash(const arc_util::BuildProperty& build_property);

 private:
  friend class ArcvmKernelCollectorTest;
  FRIEND_TEST(ArcvmKernelCollectorTest,
              HandleCrashWithRamoopsStreamAndTimestamp);
  FRIEND_TEST(ArcvmKernelCollectorTest, AddArcMetadata);

  // Handles a kernel crash of ARCVM using the given stream for ramoops.
  // |timestamp| is used for a filename of the crash report.
  bool HandleCrashWithRamoopsStreamAndTimestamp(
      const arc_util::BuildProperty& build_property,
      FILE* ramoops_stream,
      time_t timestamp);

  // Adds ARC-related metadata to the crash report.
  void AddArcMetadata(const arc_util::BuildProperty& build_property);
};

#endif  // CRASH_REPORTER_ARCVM_KERNEL_COLLECTOR_H_