Adding crash utilities to chromecast/crash.

chromecast/crash/minidump_writer.h

Index: chromecast/crash/minidump_writer.h
diff --git a/chromecast/crash/minidump_writer.h b/chromecast/crash/minidump_writer.h
new file mode 100644
index 0000000000000000000000000000000000000000..7e39e458d4f9945164b2195a709edb48f2778ec2
--- /dev/null
+++ b/chromecast/crash/minidump_writer.h
@@ -0,0 +1,64 @@
+// 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_MINIDUMP_WRITER_H_
+#define CHROMECAST_CRASH_MINIDUMP_WRITER_H_
+
+#include <stdint.h>
+
+#include "base/macros.h"
+#include "chromecast/crash/dump_info.h"
+#include "chromecast/crash/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);
+
+ protected:
+  // MinidumpManager implementation:
+  int DoWork() override;
+
+ private:
+  friend class MinidumpWriterTest;

[gunsch, 2015/06/09 18:46:19]

nit: prefer using public *ForTest methods (enforced by presubmit) rather than
having test classes invoke private members. Makes future refactoring/code change
easier.

[slan, 2015/06/10 01:49:13]

Done.

+
+  // Returns true if we can write another dump, false otherwise. This
+  // function checks for two limits: current number of dumps in *dump_path*,
+  // and recent number of dumps written in *dump_interval*. The respective
+  // maximums are defined by *max_dumps* and *max_recent_dumps*. *fd* is the
+  // file descriptor of the lockfile.
+  bool CanWriteDump();
+
+  // 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_MINIDUMP_WRITER_H_