Get SIGTERM when parent process dies.

chromecast/browser/cast_browser_main_parts.cc

 // Copyright 2014 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.
 
 #include "chromecast/browser/cast_browser_main_parts.h"
 
 #include <signal.h>
+#include <sys/prctl.h>
 
 #include "base/command_line.h"
 #include "base/files/file_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
 #include "base/prefs/pref_registry_simple.h"
 #include "base/run_loop.h"
 #include "cc/base/switches.h"
 #include "chromecast/base/metrics/cast_metrics_helper.h"
 #include "chromecast/base/metrics/grouped_histogram.h"
@@ skipping 32 matching lines @@
 void RunClosureOnSignal(int signum) {
   LOG(ERROR) << "Got signal " << signum;
   DCHECK(g_signal_closure);
   // Expect main thread got this signal. Otherwise, weak_ptr of run_loop will
   // crash the process.
   g_signal_closure->Run();
 }
 
 void RegisterClosureOnSignal(const base::Closure& closure) {
   DCHECK(!g_signal_closure);
+  DCHECK_GT(arraysize(kSignalsToRunClosure), 0U);
+
   // Allow memory leak by intention.
   g_signal_closure = new base::Closure(closure);
 
   struct sigaction sa_new;
   memset(&sa_new, 0, sizeof(sa_new));
   sa_new.sa_handler = RunClosureOnSignal;
   sigfillset(&sa_new.sa_mask);
   sa_new.sa_flags = SA_RESTART;
 
   for (size_t i = 0; i < arraysize(kSignalsToRunClosure); i++) {
     struct sigaction sa_old;
     if (sigaction(kSignalsToRunClosure[i], &sa_new, &sa_old) == -1) {
       NOTREACHED();
     } else {
       DCHECK_EQ(sa_old.sa_handler, SIG_DFL);
     }
   }
+
+  // Get the first signal to exit when the parent process dies.
+  prctl(PR_SET_PDEATHSIG, kSignalsToRunClosure[0]);
 }
 
 }  // namespace
 
 namespace chromecast {
 namespace shell {
 
 namespace {
 
 struct DefaultCommandLineSwitch {
@@ skipping 165 matching lines @@
 }
 
 void CastBrowserMainParts::PostMainMessageLoopRun() {
   cast_browser_process_->cast_service()->Finalize();
   cast_browser_process_->metrics_service_client()->Finalize();
   cast_browser_process_.reset();
 }
 
 }  // namespace shell
 }  // namespace chromecast