summaryrefslogtreecommitdiffstats
path: root/ipc/glue/ProcessChild.cpp
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--ipc/glue/ProcessChild.cpp137
1 files changed, 137 insertions, 0 deletions
diff --git a/ipc/glue/ProcessChild.cpp b/ipc/glue/ProcessChild.cpp
new file mode 100644
index 0000000000..7a8a74cc1e
--- /dev/null
+++ b/ipc/glue/ProcessChild.cpp
@@ -0,0 +1,137 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/ipc/ProcessChild.h"
+
+#include "Endpoint.h"
+#include "nsDebug.h"
+
+#ifdef XP_WIN
+# include <stdlib.h> // for _exit()
+# include <synchapi.h>
+#else
+# include <unistd.h> // for _exit()
+# include <time.h>
+# include "base/eintr_wrapper.h"
+# include "prenv.h"
+#endif
+
+#include "nsAppRunner.h"
+#include "mozilla/AppShutdown.h"
+#include "mozilla/ipc/CrashReporterClient.h"
+#include "mozilla/ipc/IOThreadChild.h"
+#include "mozilla/GeckoArgs.h"
+
+namespace mozilla {
+namespace ipc {
+
+ProcessChild* ProcessChild::gProcessChild;
+
+static Atomic<bool> sExpectingShutdown(false);
+
+ProcessChild::ProcessChild(ProcessId aParentPid, const nsID& aMessageChannelId)
+ : ChildProcess(new IOThreadChild()),
+ mUILoop(MessageLoop::current()),
+ mParentPid(aParentPid),
+ mMessageChannelId(aMessageChannelId) {
+ MOZ_ASSERT(mUILoop, "UILoop should be created by now");
+ MOZ_ASSERT(!gProcessChild, "should only be one ProcessChild");
+ gProcessChild = this;
+}
+
+/* static */
+void ProcessChild::AddPlatformBuildID(std::vector<std::string>& aExtraArgs) {
+ nsCString parentBuildID(mozilla::PlatformBuildID());
+ geckoargs::sParentBuildID.Put(parentBuildID.get(), aExtraArgs);
+}
+
+/* static */
+bool ProcessChild::InitPrefs(int aArgc, char* aArgv[]) {
+ Maybe<uint64_t> prefsHandle = Some(0);
+ Maybe<uint64_t> prefMapHandle = Some(0);
+ Maybe<uint64_t> prefsLen = geckoargs::sPrefsLen.Get(aArgc, aArgv);
+ Maybe<uint64_t> prefMapSize = geckoargs::sPrefMapSize.Get(aArgc, aArgv);
+
+ if (prefsLen.isNothing() || prefMapSize.isNothing()) {
+ return false;
+ }
+
+#ifdef XP_WIN
+ prefsHandle = geckoargs::sPrefsHandle.Get(aArgc, aArgv);
+ prefMapHandle = geckoargs::sPrefMapHandle.Get(aArgc, aArgv);
+
+ if (prefsHandle.isNothing() || prefMapHandle.isNothing()) {
+ return false;
+ }
+#endif
+
+ SharedPreferenceDeserializer deserializer;
+ return deserializer.DeserializeFromSharedMemory(*prefsHandle, *prefMapHandle,
+ *prefsLen, *prefMapSize);
+}
+
+#ifdef ENABLE_TESTS
+// Allow tests to cause a synthetic delay/"hang" during child process
+// shutdown by setting environment variables.
+# ifdef XP_UNIX
+static void ReallySleep(int aSeconds) {
+ struct ::timespec snooze = {aSeconds, 0};
+ HANDLE_EINTR(nanosleep(&snooze, &snooze));
+}
+# elif defined(XP_WIN)
+static void ReallySleep(int aSeconds) { ::Sleep(aSeconds * 1000); }
+# endif // Unix/Win
+static void SleepIfEnv(const char* aName) {
+ if (auto* value = PR_GetEnv(aName)) {
+ ReallySleep(atoi(value));
+ }
+}
+#else // not tests
+static void SleepIfEnv(const char* aName) {}
+#endif
+
+ProcessChild::~ProcessChild() {
+#ifdef NS_FREE_PERMANENT_DATA
+ // In this case, we won't early-exit and we'll wait indefinitely for
+ // child processes to terminate. This sleep is late enough that, in
+ // content processes, it won't block parent process shutdown, so
+ // we'll get into late IPC shutdown with processes still running.
+ SleepIfEnv("MOZ_TEST_CHILD_EXIT_HANG");
+#endif
+ gProcessChild = nullptr;
+}
+
+/* static */
+void ProcessChild::NotifiedImpendingShutdown() {
+ sExpectingShutdown = true;
+ CrashReporter::AppendToCrashReportAnnotation(
+ CrashReporter::Annotation::IPCShutdownState,
+ "NotifiedImpendingShutdown"_ns);
+}
+
+/* static */
+bool ProcessChild::ExpectingShutdown() { return sExpectingShutdown; }
+
+/* static */
+void ProcessChild::QuickExit() {
+#ifndef NS_FREE_PERMANENT_DATA
+ // In this case, we're going to terminate the child process before
+ // we get to ~ProcessChild above (and terminate the parent process
+ // before the shutdown hook in ProcessWatcher). Instead, blocking
+ // earlier will let us exercise ProcessWatcher's kill timer.
+ SleepIfEnv("MOZ_TEST_CHILD_EXIT_HANG");
+#endif
+ AppShutdown::DoImmediateExit();
+}
+
+UntypedEndpoint ProcessChild::TakeInitialEndpoint() {
+ return UntypedEndpoint{PrivateIPDLInterface{},
+ child_thread()->TakeInitialPort(), mMessageChannelId,
+ base::GetCurrentProcId(), mParentPid};
+}
+
+} // namespace ipc
+} // namespace mozilla