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gecko/toolkit/xre/nsEmbedFunctions.cpp
Benjamin Smedberg d19c5bb416 Bug 771251 - OOP crash reporting accesses the directory service off the main thread. In addition, the first design of the crash injector callback meant that we're dropping some set of Flash crashes which happen during an RPC call. r=ted 
* Fix the directory service usage by saving the pending directory path from OOPInit.
* Force clients to call OOPInit on the main thread.
* Make injected crashes available via TakeMinidumpForChild and give each crash a sequence number so that we can pick the earliest crash from the three possibilities; delete the other two to avoid polluting about:crashes
2012-07-10 22:20:05 -04:00

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/* 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/. */
#if defined(MOZ_WIDGET_QT)
#include "nsQAppInstance.h"
#endif
#include "base/basictypes.h"
#include "nsXULAppAPI.h"
#include <stdlib.h>
#if defined(MOZ_WIDGET_GTK)
#include <glib.h>
#endif
#include "prenv.h"
#include "nsIAppShell.h"
#include "nsIAppStartupNotifier.h"
#include "nsIDirectoryService.h"
#include "nsIFile.h"
#include "nsIToolkitChromeRegistry.h"
#include "nsIToolkitProfile.h"
#if defined(OS_LINUX)
# define XP_LINUX
#endif
#ifdef XP_WIN
#include <process.h>
#endif
#include "nsAppDirectoryServiceDefs.h"
#include "nsAppRunner.h"
#include "nsAutoRef.h"
#include "nsDirectoryServiceDefs.h"
#include "nsExceptionHandler.h"
#include "nsString.h"
#include "nsThreadUtils.h"
#include "nsJSUtils.h"
#include "nsWidgetsCID.h"
#include "nsXREDirProvider.h"
#include "mozilla/Omnijar.h"
#if defined(XP_MACOSX)
#include "nsVersionComparator.h"
#include "chrome/common/mach_ipc_mac.h"
#endif
#include "nsX11ErrorHandler.h"
#include "base/at_exit.h"
#include "base/command_line.h"
#include "base/message_loop.h"
#include "base/process_util.h"
#include "chrome/common/child_process.h"
#include "chrome/common/notification_service.h"
#include "mozilla/ipc/BrowserProcessSubThread.h"
#include "mozilla/ipc/GeckoChildProcessHost.h"
#include "mozilla/ipc/IOThreadChild.h"
#include "mozilla/ipc/ProcessChild.h"
#include "ScopedXREEmbed.h"
#include "mozilla/plugins/PluginProcessChild.h"
#include "mozilla/dom/ContentProcess.h"
#include "mozilla/dom/ContentParent.h"
#include "mozilla/dom/ContentChild.h"
#include "mozilla/jsipc/ContextWrapperParent.h"
#include "mozilla/ipc/TestShellParent.h"
#include "mozilla/ipc/XPCShellEnvironment.h"
#include "mozilla/Util.h" // for DebugOnly
#ifdef MOZ_IPDL_TESTS
#include "mozilla/_ipdltest/IPDLUnitTests.h"
#include "mozilla/_ipdltest/IPDLUnitTestProcessChild.h"
using mozilla::_ipdltest::IPDLUnitTestProcessChild;
#endif // ifdef MOZ_IPDL_TESTS
using namespace mozilla;
using mozilla::ipc::BrowserProcessSubThread;
using mozilla::ipc::GeckoChildProcessHost;
using mozilla::ipc::IOThreadChild;
using mozilla::ipc::ProcessChild;
using mozilla::ipc::ScopedXREEmbed;
using mozilla::plugins::PluginProcessChild;
using mozilla::dom::ContentProcess;
using mozilla::dom::ContentParent;
using mozilla::dom::ContentChild;
using mozilla::jsipc::PContextWrapperParent;
using mozilla::jsipc::ContextWrapperParent;
using mozilla::ipc::TestShellParent;
using mozilla::ipc::TestShellCommandParent;
using mozilla::ipc::XPCShellEnvironment;
using mozilla::startup::sChildProcessType;
static NS_DEFINE_CID(kAppShellCID, NS_APPSHELL_CID);
#ifdef XP_WIN
static const PRUnichar kShellLibraryName[] = L"shell32.dll";
#endif
nsresult
XRE_LockProfileDirectory(nsIFile* aDirectory,
nsISupports* *aLockObject)
{
nsCOMPtr<nsIProfileLock> lock;
nsresult rv = NS_LockProfilePath(aDirectory, nsnull, nsnull,
getter_AddRefs(lock));
if (NS_SUCCEEDED(rv))
NS_ADDREF(*aLockObject = lock);
return rv;
}
static PRInt32 sInitCounter;
nsresult
XRE_InitEmbedding2(nsIFile *aLibXULDirectory,
nsIFile *aAppDirectory,
nsIDirectoryServiceProvider *aAppDirProvider)
{
// Initialize some globals to make nsXREDirProvider happy
static char* kNullCommandLine[] = { nsnull };
gArgv = kNullCommandLine;
gArgc = 0;
NS_ENSURE_ARG(aLibXULDirectory);
if (++sInitCounter > 1) // XXXbsmedberg is this really the right solution?
return NS_OK;
if (!aAppDirectory)
aAppDirectory = aLibXULDirectory;
nsresult rv;
new nsXREDirProvider; // This sets gDirServiceProvider
if (!gDirServiceProvider)
return NS_ERROR_OUT_OF_MEMORY;
rv = gDirServiceProvider->Initialize(aAppDirectory, aLibXULDirectory,
aAppDirProvider);
if (NS_FAILED(rv))
return rv;
rv = NS_InitXPCOM2(nsnull, aAppDirectory, gDirServiceProvider);
if (NS_FAILED(rv))
return rv;
// We do not need to autoregister components here. The CheckCompatibility()
// bits in nsAppRunner.cpp check for an invalidation flag in
// compatibility.ini.
// If the app wants to autoregister every time (for instance, if it's debug),
// it can do so after we return from this function.
nsCOMPtr<nsIObserver> startupNotifier
(do_CreateInstance(NS_APPSTARTUPNOTIFIER_CONTRACTID));
if (!startupNotifier)
return NS_ERROR_FAILURE;
startupNotifier->Observe(nsnull, APPSTARTUP_TOPIC, nsnull);
return NS_OK;
}
void
XRE_NotifyProfile()
{
NS_ASSERTION(gDirServiceProvider, "XRE_InitEmbedding was not called!");
gDirServiceProvider->DoStartup();
}
void
XRE_TermEmbedding()
{
if (--sInitCounter != 0)
return;
NS_ASSERTION(gDirServiceProvider,
"XRE_TermEmbedding without XRE_InitEmbedding");
gDirServiceProvider->DoShutdown();
NS_ShutdownXPCOM(nsnull);
delete gDirServiceProvider;
}
const char*
XRE_ChildProcessTypeToString(GeckoProcessType aProcessType)
{
return (aProcessType < GeckoProcessType_End) ?
kGeckoProcessTypeString[aProcessType] : nsnull;
}
GeckoProcessType
XRE_StringToChildProcessType(const char* aProcessTypeString)
{
for (int i = 0;
i < (int) ArrayLength(kGeckoProcessTypeString);
++i) {
if (!strcmp(kGeckoProcessTypeString[i], aProcessTypeString)) {
return static_cast<GeckoProcessType>(i);
}
}
return GeckoProcessType_Invalid;
}
namespace mozilla {
namespace startup {
GeckoProcessType sChildProcessType = GeckoProcessType_Default;
}
}
#if defined(MOZ_CRASHREPORTER)
// FIXME/bug 539522: this out-of-place function is stuck here because
// IPDL wants access to this crashreporter interface, and
// crashreporter is built in such a way to make that awkward
bool
XRE_TakeMinidumpForChild(PRUint32 aChildPid, nsIFile** aDump,
PRUint32* aSequence)
{
return CrashReporter::TakeMinidumpForChild(aChildPid, aDump, aSequence);
}
bool
XRE_SetRemoteExceptionHandler(const char* aPipe/*= 0*/)
{
#if defined(XP_WIN) || defined(XP_MACOSX)
return CrashReporter::SetRemoteExceptionHandler(nsDependentCString(aPipe));
#elif defined(OS_LINUX)
return CrashReporter::SetRemoteExceptionHandler();
#else
# error "OOP crash reporter unsupported on this platform"
#endif
}
#endif // if defined(MOZ_CRASHREPORTER)
#if defined(XP_WIN)
void
SetTaskbarGroupId(const nsString& aId)
{
typedef HRESULT (WINAPI * SetCurrentProcessExplicitAppUserModelIDPtr)(PCWSTR AppID);
SetCurrentProcessExplicitAppUserModelIDPtr funcAppUserModelID = nsnull;
HMODULE hDLL = ::LoadLibraryW(kShellLibraryName);
funcAppUserModelID = (SetCurrentProcessExplicitAppUserModelIDPtr)
GetProcAddress(hDLL, "SetCurrentProcessExplicitAppUserModelID");
if (!funcAppUserModelID) {
::FreeLibrary(hDLL);
return;
}
if (FAILED(funcAppUserModelID(aId.get()))) {
NS_WARNING("SetCurrentProcessExplicitAppUserModelID failed for child process.");
}
if (hDLL)
::FreeLibrary(hDLL);
}
#endif
nsresult
XRE_InitChildProcess(int aArgc,
char* aArgv[],
GeckoProcessType aProcess)
{
NS_ENSURE_ARG_MIN(aArgc, 2);
NS_ENSURE_ARG_POINTER(aArgv);
NS_ENSURE_ARG_POINTER(aArgv[0]);
sChildProcessType = aProcess;
// Complete 'task_t' exchange for Mac OS X. This structure has the same size
// regardless of architecture so we don't have any cross-arch issues here.
#ifdef XP_MACOSX
if (aArgc < 1)
return 1;
const char* const mach_port_name = aArgv[--aArgc];
const int kTimeoutMs = 1000;
MachSendMessage child_message(0);
if (!child_message.AddDescriptor(mach_task_self())) {
NS_WARNING("child AddDescriptor(mach_task_self()) failed.");
return 1;
}
ReceivePort child_recv_port;
mach_port_t raw_child_recv_port = child_recv_port.GetPort();
if (!child_message.AddDescriptor(raw_child_recv_port)) {
NS_WARNING("Adding descriptor to message failed");
return 1;
}
MachPortSender child_sender(mach_port_name);
kern_return_t err = child_sender.SendMessage(child_message, kTimeoutMs);
if (err != KERN_SUCCESS) {
NS_WARNING("child SendMessage() failed");
return 1;
}
MachReceiveMessage parent_message;
err = child_recv_port.WaitForMessage(&parent_message, kTimeoutMs);
if (err != KERN_SUCCESS) {
NS_WARNING("child WaitForMessage() failed");
return 1;
}
if (parent_message.GetTranslatedPort(0) == MACH_PORT_NULL) {
NS_WARNING("child GetTranslatedPort(0) failed");
return 1;
}
err = task_set_bootstrap_port(mach_task_self(),
parent_message.GetTranslatedPort(0));
if (err != KERN_SUCCESS) {
NS_WARNING("child task_set_bootstrap_port() failed");
return 1;
}
#endif
SetupErrorHandling(aArgv[0]);
#if defined(MOZ_CRASHREPORTER)
if (aArgc < 1)
return 1;
const char* const crashReporterArg = aArgv[--aArgc];
# if defined(XP_WIN) || defined(XP_MACOSX)
// on windows and mac, |crashReporterArg| is the named pipe on which the
// server is listening for requests, or "-" if crash reporting is
// disabled.
if (0 != strcmp("-", crashReporterArg) &&
!XRE_SetRemoteExceptionHandler(crashReporterArg)) {
// Bug 684322 will add better visibility into this condition
NS_WARNING("Could not setup crash reporting\n");
}
# elif defined(OS_LINUX)
// on POSIX, |crashReporterArg| is "true" if crash reporting is
// enabled, false otherwise
if (0 != strcmp("false", crashReporterArg) &&
!XRE_SetRemoteExceptionHandler(NULL)) {
// Bug 684322 will add better visibility into this condition
NS_WARNING("Could not setup crash reporting\n");
}
# else
# error "OOP crash reporting unsupported on this platform"
# endif
#endif // if defined(MOZ_CRASHREPORTER)
gArgv = aArgv;
gArgc = aArgc;
#if defined(MOZ_WIDGET_GTK)
g_thread_init(NULL);
#endif
#if defined(MOZ_WIDGET_QT)
nsQAppInstance::AddRef();
#endif
if (PR_GetEnv("MOZ_DEBUG_CHILD_PROCESS")) {
#ifdef OS_POSIX
printf("\n\nCHILDCHILDCHILDCHILD\n debug me @%d\n\n", getpid());
sleep(30);
#elif defined(OS_WIN)
printf("\n\nCHILDCHILDCHILDCHILD\n debug me @%d\n\n", _getpid());
Sleep(30000);
#endif
}
// child processes launched by GeckoChildProcessHost get this magic
// argument appended to their command lines
const char* const parentPIDString = aArgv[aArgc-1];
NS_ABORT_IF_FALSE(parentPIDString, "NULL parent PID");
--aArgc;
char* end = 0;
base::ProcessId parentPID = strtol(parentPIDString, &end, 10);
NS_ABORT_IF_FALSE(!*end, "invalid parent PID");
base::ProcessHandle parentHandle;
mozilla::DebugOnly<bool> ok = base::OpenProcessHandle(parentPID, &parentHandle);
NS_ABORT_IF_FALSE(ok, "can't open handle to parent");
#if defined(XP_WIN)
// On Win7+, register the application user model id passed in by
// parent. This insures windows created by the container properly
// group with the parent app on the Win7 taskbar.
const char* const appModelUserId = aArgv[aArgc-1];
--aArgc;
if (appModelUserId) {
// '-' implies no support
if (*appModelUserId != '-') {
nsString appId;
appId.AssignWithConversion(nsDependentCString(appModelUserId));
// The version string is encased in quotes
appId.Trim(NS_LITERAL_CSTRING("\"").get());
// Set the id
SetTaskbarGroupId(appId);
}
}
#endif
base::AtExitManager exitManager;
NotificationService notificationService;
NS_LogInit();
int rv = XRE_InitCommandLine(aArgc, aArgv);
if (NS_FAILED(rv)) {
NS_LogTerm();
return NS_ERROR_FAILURE;
}
MessageLoop::Type uiLoopType;
switch (aProcess) {
case GeckoProcessType_Content:
// Content processes need the XPCOM/chromium frankenventloop
uiLoopType = MessageLoop::TYPE_MOZILLA_CHILD;
break;
default:
uiLoopType = MessageLoop::TYPE_UI;
break;
}
{
// This is a lexical scope for the MessageLoop below. We want it
// to go out of scope before NS_LogTerm() so that we don't get
// spurious warnings about XPCOM objects being destroyed from a
// static context.
// Associate this thread with a UI MessageLoop
MessageLoop uiMessageLoop(uiLoopType);
{
nsAutoPtr<ProcessChild> process;
switch (aProcess) {
case GeckoProcessType_Default:
NS_RUNTIMEABORT("This makes no sense");
break;
case GeckoProcessType_Plugin:
process = new PluginProcessChild(parentHandle);
break;
case GeckoProcessType_Content:
process = new ContentProcess(parentHandle);
break;
case GeckoProcessType_IPDLUnitTest:
#ifdef MOZ_IPDL_TESTS
process = new IPDLUnitTestProcessChild(parentHandle);
#else
NS_RUNTIMEABORT("rebuild with --enable-ipdl-tests");
#endif
break;
default:
NS_RUNTIMEABORT("Unknown main thread class");
}
if (!process->Init()) {
NS_LogTerm();
return NS_ERROR_FAILURE;
}
// Run the UI event loop on the main thread.
uiMessageLoop.MessageLoop::Run();
// Allow ProcessChild to clean up after itself before going out of
// scope and being deleted
process->CleanUp();
mozilla::Omnijar::CleanUp();
}
}
NS_LogTerm();
return XRE_DeinitCommandLine();
}
MessageLoop*
XRE_GetIOMessageLoop()
{
if (sChildProcessType == GeckoProcessType_Default) {
return BrowserProcessSubThread::GetMessageLoop(BrowserProcessSubThread::IO);
}
return IOThreadChild::message_loop();
}
namespace {
class MainFunctionRunnable : public nsRunnable
{
public:
NS_DECL_NSIRUNNABLE
MainFunctionRunnable(MainFunction aFunction,
void* aData)
: mFunction(aFunction),
mData(aData)
{
NS_ASSERTION(aFunction, "Don't give me a null pointer!");
}
private:
MainFunction mFunction;
void* mData;
};
} /* anonymous namespace */
NS_IMETHODIMP
MainFunctionRunnable::Run()
{
mFunction(mData);
return NS_OK;
}
nsresult
XRE_InitParentProcess(int aArgc,
char* aArgv[],
MainFunction aMainFunction,
void* aMainFunctionData)
{
NS_ENSURE_ARG_MIN(aArgc, 1);
NS_ENSURE_ARG_POINTER(aArgv);
NS_ENSURE_ARG_POINTER(aArgv[0]);
ScopedXREEmbed embed;
gArgc = aArgc;
gArgv = aArgv;
int rv = XRE_InitCommandLine(gArgc, gArgv);
if (NS_FAILED(rv))
return NS_ERROR_FAILURE;
{
embed.Start();
nsCOMPtr<nsIAppShell> appShell(do_GetService(kAppShellCID));
NS_ENSURE_TRUE(appShell, NS_ERROR_FAILURE);
if (aMainFunction) {
nsCOMPtr<nsIRunnable> runnable =
new MainFunctionRunnable(aMainFunction, aMainFunctionData);
NS_ENSURE_TRUE(runnable, NS_ERROR_OUT_OF_MEMORY);
nsresult rv = NS_DispatchToCurrentThread(runnable);
NS_ENSURE_SUCCESS(rv, rv);
}
// Do event loop
if (NS_FAILED(appShell->Run())) {
NS_WARNING("Failed to run appshell");
return NS_ERROR_FAILURE;
}
}
return XRE_DeinitCommandLine();
}
#ifdef MOZ_IPDL_TESTS
//-----------------------------------------------------------------------------
// IPDL unit test
int
XRE_RunIPDLTest(int aArgc, char** aArgv)
{
if (aArgc < 2) {
fprintf(stderr, "TEST-UNEXPECTED-FAIL | <---> | insufficient #args, need at least 2\n");
return 1;
}
void* data = reinterpret_cast<void*>(aArgv[aArgc-1]);
nsresult rv =
XRE_InitParentProcess(
--aArgc, aArgv, mozilla::_ipdltest::IPDLUnitTestMain, data);
NS_ENSURE_SUCCESS(rv, 1);
return 0;
}
#endif // ifdef MOZ_IPDL_TESTS
nsresult
XRE_RunAppShell()
{
nsCOMPtr<nsIAppShell> appShell(do_GetService(kAppShellCID));
#if defined(XP_MACOSX)
{
// In content processes that want XPCOM (and hence want
// AppShell), we usually run our hybrid event loop through
// MessagePump::Run(), by way of nsBaseAppShell::Run(). The
// Cocoa nsAppShell impl, however, implements its own Run()
// that's unaware of MessagePump. That's all rather suboptimal,
// but oddly enough not a problem... usually.
//
// The problem with this setup comes during startup.
// XPCOM-in-subprocesses depends on IPC, e.g. to init the pref
// service, so we have to init IPC first. But, IPC also
// indirectly kinda-depends on XPCOM, because MessagePump
// schedules work from off-main threads (e.g. IO thread) by
// using NS_DispatchToMainThread(). If the IO thread receives a
// Message from the parent before nsThreadManager is
// initialized, then DispatchToMainThread() will fail, although
// MessagePump will remember the task. This race condition
// isn't a problem when appShell->Run() ends up in
// MessagePump::Run(), because MessagePump will immediate see it
// has work to do. It *is* a problem when we end up in [NSApp
// run], because it's not aware that MessagePump has work that
// needs to be processed; that was supposed to be signaled by
// nsIRunnable(s).
//
// So instead of hacking Cocoa nsAppShell or rewriting the
// event-loop system, we compromise here by processing any tasks
// that might have been enqueued on MessagePump, *before*
// MessagePump::ScheduleWork was able to successfully
// DispatchToMainThread().
MessageLoop* loop = MessageLoop::current();
bool couldNest = loop->NestableTasksAllowed();
loop->SetNestableTasksAllowed(true);
loop->PostTask(FROM_HERE, new MessageLoop::QuitTask());
loop->Run();
loop->SetNestableTasksAllowed(couldNest);
}
#endif // XP_MACOSX
return appShell->Run();
}
template<>
struct RunnableMethodTraits<ContentChild>
{
static void RetainCallee(ContentChild* obj) { }
static void ReleaseCallee(ContentChild* obj) { }
};
void
XRE_ShutdownChildProcess()
{
NS_ABORT_IF_FALSE(MessageLoopForUI::current(), "Wrong thread!");
mozilla::DebugOnly<MessageLoop*> ioLoop = XRE_GetIOMessageLoop();
NS_ABORT_IF_FALSE(!!ioLoop, "Bad shutdown order");
// Quit() sets off the following chain of events
// (1) UI loop starts quitting
// (2) UI loop returns from Run() in XRE_InitChildProcess()
// (3) ProcessChild goes out of scope and terminates the IO thread
// (4) ProcessChild joins the IO thread
// (5) exit()
MessageLoop::current()->Quit();
#if defined(XP_MACOSX)
nsCOMPtr<nsIAppShell> appShell(do_GetService(kAppShellCID));
if (appShell) {
// On Mac, we might be only above nsAppShell::Run(), not
// MessagePump::Run(). See XRE_RunAppShell(). To account for
// that case, we fire off an Exit() here. If we were indeed
// above MessagePump::Run(), this Exit() is just superfluous.
appShell->Exit();
}
#endif // XP_MACOSX
}
namespace {
ContentParent* gContentParent; //long-lived, manually refcounted
TestShellParent* GetOrCreateTestShellParent()
{
if (!gContentParent) {
NS_ADDREF(gContentParent = ContentParent::GetNewOrUsed());
} else if (!gContentParent->IsAlive()) {
return nsnull;
}
TestShellParent* tsp = gContentParent->GetTestShellSingleton();
if (!tsp) {
tsp = gContentParent->CreateTestShell();
}
return tsp;
}
}
bool
XRE_SendTestShellCommand(JSContext* aCx,
JSString* aCommand,
void* aCallback)
{
TestShellParent* tsp = GetOrCreateTestShellParent();
NS_ENSURE_TRUE(tsp, false);
nsDependentJSString command;
NS_ENSURE_TRUE(command.init(aCx, aCommand), false);
if (!aCallback) {
return tsp->SendExecuteCommand(command);
}
TestShellCommandParent* callback = static_cast<TestShellCommandParent*>(
tsp->SendPTestShellCommandConstructor(command));
NS_ENSURE_TRUE(callback, false);
jsval callbackVal = *reinterpret_cast<jsval*>(aCallback);
NS_ENSURE_TRUE(callback->SetCallback(aCx, callbackVal), false);
return true;
}
bool
XRE_GetChildGlobalObject(JSContext* aCx, JSObject** aGlobalP)
{
TestShellParent* tsp = GetOrCreateTestShellParent();
return tsp && tsp->GetGlobalJSObject(aCx, aGlobalP);
}
bool
XRE_ShutdownTestShell()
{
if (!gContentParent) {
return true;
}
bool ret = true;
if (gContentParent->IsAlive()) {
ret = gContentParent->DestroyTestShell(
gContentParent->GetTestShellSingleton());
}
NS_RELEASE(gContentParent);
return ret;
}
#ifdef MOZ_X11
void
XRE_InstallX11ErrorHandler()
{
InstallX11ErrorHandler();
}
#endif
#ifdef XP_WIN
static WindowsEnvironmentType
sWindowsEnvironmentType = WindowsEnvironmentType_Desktop;
void
SetWindowsEnvironment(WindowsEnvironmentType aEnvID)
{
sWindowsEnvironmentType = aEnvID;
}
WindowsEnvironmentType
XRE_GetWindowsEnvironment()
{
return sWindowsEnvironmentType;
}
#endif // XP_WIN
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