Create the PruneCrashReportsThread in the handler.

This will prune the database on a daily basis, in accordance with the specified
condition.

BUG=crashpad:22
R=mark@chromium.org

Review URL: https://codereview.chromium.org/1534503002 .

handler/handler.gyp

@@ -38,12 +38,14 @@
       'sources': [
         'crash_report_upload_thread.cc',
         'crash_report_upload_thread.h',
+        'handler_main.cc',
+        'handler_main.h',
         'mac/crash_report_exception_handler.cc',
         'mac/crash_report_exception_handler.h',
         'mac/exception_handler_server.cc',
         'mac/exception_handler_server.h',
-        'handler_main.cc',
+        'prune_crash_reports_thread.cc',
-        'handler_main.h',
+        'prune_crash_reports_thread.h',
         'win/crash_report_exception_handler.cc',
         'win/crash_report_exception_handler.h',
       ],

handler/handler_main.cc

@@ -31,8 +31,10 @@
 #include "build/build_config.h"
 #include "client/crash_report_database.h"
 #include "client/crashpad_client.h"
+#include "client/prune_crash_reports.h"
 #include "tools/tool_support.h"
 #include "handler/crash_report_upload_thread.h"
+#include "handler/prune_crash_reports_thread.h"
 #include "util/file/file_io.h"
 #include "util/stdlib/map_insert.h"
 #include "util/stdlib/string_number_conversion.h"
@@ -372,12 +374,17 @@ int HandlerMain(int argc, char* argv[]) {
   CrashReportUploadThread upload_thread(database.get(), options.url);
   upload_thread.Start();
 
+  PruneCrashReportThread prune_thread(database.get(),
+                                      PruneCondition::GetDefault());
+  prune_thread.Start();
+
   CrashReportExceptionHandler exception_handler(
       database.get(), &upload_thread, &options.annotations);
 
   exception_handler_server.Run(&exception_handler);
 
   upload_thread.Stop();
+  prune_thread.Stop();
 
   return EXIT_SUCCESS;
 }

handler/prune_crash_reports_thread.cc

@@ -0,0 +1,42 @@
+// Copyright 2016 The Crashpad Authors. All rights reserved.
+//
+// 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.
+
+#include "handler/prune_crash_reports_thread.h"
+
+#include "client/prune_crash_reports.h"
+
+namespace crashpad {
+
+PruneCrashReportThread::PruneCrashReportThread(
+    CrashReportDatabase* database,
+    scoped_ptr<PruneCondition> condition)
+    : thread_(60 * 60 * 24, this),
+      condition_(condition.Pass()),
+      database_(database) {}
+
+PruneCrashReportThread::~PruneCrashReportThread() {}
+
+void PruneCrashReportThread::Start() {
+  thread_.Start(60 * 10);
+}
+
+void PruneCrashReportThread::Stop() {
+  thread_.Stop();
+}
+
+void PruneCrashReportThread::DoWork(const WorkerThread* thread) {
+  PruneCrashReportDatabase(database_, condition_.get());
+}
+
+}  // namespace crashpad

handler/prune_crash_reports_thread.h

@@ -0,0 +1,75 @@
+// Copyright 2016 The Crashpad Authors. All rights reserved.
+//
+// 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.
+
+#ifndef CRASHPAD_HANDLER_PRUNE_CRASH_REPORTS_THREAD_H_
+#define CRASHPAD_HANDLER_PRUNE_CRASH_REPORTS_THREAD_H_
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "util/thread/worker_thread.h"
+
+namespace crashpad {
+
+class CrashReportDatabase;
+class PruneCondition;
+
+//! \brief A thread that periodically prunes crash reports from the database
+//!     using the specified condition.
+//!
+//! After the thread is started, the database is pruned using the condition
+//! every 24 hours. Upon calling Start(), the thread waits 10 minutes before
+//! performing the initial prune operation.
+class PruneCrashReportThread : public WorkerThread::Delegate {
+ public:
+  //! \brief Constructs a new object.
+  //!
+  //! \param[in] database The database to prune crash reports from.
+  //! \param[in] condition The condition used to evaluate crash reports for
+  //!     pruning.
+  PruneCrashReportThread(CrashReportDatabase* database,
+                         scoped_ptr<PruneCondition> condition);
+  ~PruneCrashReportThread();
+
+  //! \brief Starts a dedicated pruning thread.
+  //!
+  //! The thread waits before running the initial prune, so as to not interfere
+  //! with any startup-related IO performed by the client.
+  //!
+  //! This method may only be be called on a newly-constructed object or after
+  //! a call to Stop().
+  void Start();
+
+  //! \brief Stops the pruning thread.
+  //!
+  //! This method must only be called after Start(). If Start() has been called,
+  //! this method must be called before destroying an object of this class.
+  //!
+  //! This method may be called from any thread other than the pruning thread.
+  //! It is expected to only be called from the same thread that called Start().
+  void Stop();
+
+ private:
+  // WorkerThread::Delegate:
+  void DoWork(const WorkerThread* thread) override;
+
+  WorkerThread thread_;
+  scoped_ptr<PruneCondition> condition_;
+  CrashReportDatabase* database_;  // weak
+
+  DISALLOW_COPY_AND_ASSIGN(PruneCrashReportThread);
+};
+
+}  // namespace crashpad
+
+#endif  // CRASHPAD_HANDLER_PRUNE_CRASH_REPORTS_THREAD_H_