Adding crash utilities to chromecast/crash.

chromecast/crash/linux/minidump_writer.h

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROMECAST_CRASH_LINUX_MINIDUMP_WRITER_H_
+#define CHROMECAST_CRASH_LINUX_MINIDUMP_WRITER_H_
+
+#include <stdint.h>
+
+#include "base/macros.h"
+#include "chromecast/crash/linux/dump_info.h"
+#include "chromecast/crash/linux/minidump_manager.h"
+
+namespace chromecast {
+
+class MinidumpGenerator;
+
+// Class for writing a minidump.
+class MinidumpWriter : public MinidumpManager {
+ public:
+  // Constructs a minidump writer.
+  MinidumpWriter(MinidumpGenerator* minidump_generator,
+                 const std::string& minidump_path,
+                 const MinidumpParams& params);
+
+  ~MinidumpWriter() override {}
+
+  // Fork and run dumpstate, saving results to minidump_name + ".txt.gz".
+  static int DumpState(const std::string& minidump_name);
+
+  void SetMaxDumpsForTest(int max_dumps) { max_dumps_ = max_dumps; }
+  void SetMaxRecentDumpsForTest(int max_recent_dumps) {
+    max_recent_dumps_ = max_recent_dumps;
+  }
+  bool CanWriteDumpForTest() { return CanWriteDump(); };
+
+ protected:
+  // MinidumpManager implementation:
+  int DoWork() override;
+
+ private:
+  // Returns true if we can write another dump, false otherwise. This
+  // function parses the file at |lockfile_path_|, which contains records of
+  // each minidump in |minidump_path_|. We can write another dump if the number
+  // of minidumps is strictly less than |max_dumps_| and the number of minidumps
+  // which occurred within the last |dump_interval_| is strictly less than
+  // |max_recent_dumps_|. This method is expensive, and should be called
+  // sparingly.
+  bool CanWriteDump() const;
+
+  // Append another entry to the lockfile describing the latest dump written.
+  // Returns 0 on success, -1 on failure.
+  int LogLockFile(const std::string& logfile);
+
+  // These are data passed in from the constructor, to be used inside DoWork().
+  MinidumpGenerator* minidump_generator_;
+  const std::string& minidump_path_;
+  const MinidumpParams params_;
+
+  int max_dumps_;
+  int dump_interval_;
+  int max_recent_dumps_;
+  int max_total_size_;
+
+  DISALLOW_COPY_AND_ASSIGN(MinidumpWriter);
+};
+
+}  // namespace chromecast
+
+#endif  // CHROMECAST_CRASH_LINUX_MINIDUMP_WRITER_H_