Collect unclean shutdown debug information

components/browser_watcher/postmortem_report_collector.h

+// Copyright 2016 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.
+//
+// Following an unclean shutdown, a stability report can be collected and
+// submitted for upload to a reporter.
+
+#ifndef COMPONENTS_BROWSER_WATCHER_POSTMORTEM_REPORT_COLLECTOR_H_
+#define COMPONENTS_BROWSER_WATCHER_POSTMORTEM_REPORT_COLLECTOR_H_
+
+#include <stdio.h>
+
+#include <memory>
+#include <set>
+#include <vector>
+
+#include "base/files/file.h"
+#include "base/files/file_path.h"
+#include "base/gtest_prod_util.h"
+#include "base/macros.h"
+#include "components/browser_watcher/stability_report.pb.h"
+#include "third_party/crashpad/crashpad/client/crash_report_database.h"
+
+namespace browser_watcher {
+
+// Collects unclean shutdown information, builds reports out of it and submits
+// the reports for upload to a delegate.
+// TODO(manzagop): throttling, graceful handling of accumulating data.
+// TODO(manzagop): UMA metrics and some error logging.
+class PostmortemReportCollector {
+ public:
+  // Creates a postmortem report collector that will look for unclean shutdown
+  // data in |debug_dir| using |debug_file_pattern|. If data is found,
+  // |delegate| will be used for reporting.
+  PostmortemReportCollector(
+      const base::FilePath& debug_dir,
+      const base::FilePath::StringType& debug_file_pattern,
+      std::unique_ptr<crashpad::CrashReportDatabase> report_database);
+  virtual ~PostmortemReportCollector() = default;
+
+  // Collects reports about unclean shutdowns and submits them for upload.
+  // |excluded_debug_files| is a set of files to exclude, such as files
+  // pertaining to a running instance.
+  void CollectAndSubmitForUpload(
+      const std::set<base::FilePath>& excluded_debug_files);
+
+ private:
+  FRIEND_TEST_ALL_PREFIXES(PostmortemReportCollectorTest,
+                           GetDebugStateFilePaths);
+  FRIEND_TEST_ALL_PREFIXES(PostmortemReportCollectorTest, CollectEmptyFile);
+  FRIEND_TEST_ALL_PREFIXES(PostmortemReportCollectorTest, CollectRandomFile);
+  FRIEND_TEST_ALL_PREFIXES(PostmortemReportCollectorCollectionTest,
+                           CollectSuccess);
+
+  PostmortemReportCollector();
+
+  // Virtual for unittesting.
+  virtual std::vector<base::FilePath> GetDebugStateFilePaths(
+      const std::set<base::FilePath>& excluded_debug_files);
+
+  // Virtual for unittesting.
+  // TODO(manzagop): move this for reuse in live scenario.
+  virtual std::unique_ptr<StabilityReport> Collect(
+      const base::FilePath& debug_state_file);
+
+  virtual bool WriteReportToMinidump(const StabilityReport& report,
+                                     const crashpad::UUID& client_id,
+                                     const crashpad::UUID& report_id,
+                                     FILE* minidump_file);
+
+  base::FilePath debug_state_dir_;
+  base::FilePath::StringType debug_file_pattern_;
+  std::unique_ptr<crashpad::CrashReportDatabase> report_database_;
+
+  DISALLOW_COPY_AND_ASSIGN(PostmortemReportCollector);
+};
+
+}  // namespace browser_watcher
+
+#endif  // COMPONENTS_BROWSER_WATCHER_POSTMORTEM_REPORT_COLLECTOR_H_