1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "content/public/app/content_main_runner.h"
6
7 #include <stdlib.h>
8
9 #include "base/allocator/allocator_extension.h"
10 #include "base/at_exit.h"
11 #include "base/command_line.h"
12 #include "base/debug/debugger.h"
13 #include "base/debug/trace_event.h"
14 #include "base/files/file_path.h"
15 #include "base/i18n/icu_util.h"
16 #include "base/lazy_instance.h"
17 #include "base/logging.h"
18 #include "base/memory/scoped_ptr.h"
19 #include "base/memory/scoped_vector.h"
20 #include "base/metrics/stats_table.h"
21 #include "base/path_service.h"
22 #include "base/process/launch.h"
23 #include "base/process/memory.h"
24 #include "base/process/process_handle.h"
25 #include "base/profiler/alternate_timer.h"
26 #include "base/strings/string_number_conversions.h"
27 #include "base/strings/string_util.h"
28 #include "base/strings/stringprintf.h"
29 #include "content/browser/browser_main.h"
30 #include "content/common/set_process_title.h"
31 #include "content/common/url_schemes.h"
32 #include "content/gpu/in_process_gpu_thread.h"
33 #include "content/public/app/content_main.h"
34 #include "content/public/app/content_main_delegate.h"
35 #include "content/public/app/startup_helper_win.h"
36 #include "content/public/browser/content_browser_client.h"
37 #include "content/public/common/content_client.h"
38 #include "content/public/common/content_constants.h"
39 #include "content/public/common/content_paths.h"
40 #include "content/public/common/content_switches.h"
41 #include "content/public/common/main_function_params.h"
42 #include "content/public/common/sandbox_init.h"
43 #include "content/renderer/in_process_renderer_thread.h"
44 #include "content/utility/in_process_utility_thread.h"
45 #include "crypto/nss_util.h"
46 #include "ipc/ipc_descriptors.h"
47 #include "ipc/ipc_switches.h"
48 #include "media/base/media.h"
49 #include "sandbox/win/src/sandbox_types.h"
50 #include "ui/base/ui_base_paths.h"
51 #include "ui/base/ui_base_switches.h"
52
53 #if defined(OS_ANDROID)
54 #include "content/public/common/content_descriptors.h"
55 #endif
56
57 #if defined(USE_TCMALLOC)
58 #include "third_party/tcmalloc/chromium/src/gperftools/malloc_extension.h"
59 #if defined(TYPE_PROFILING)
60 #include "base/allocator/type_profiler.h"
61 #include "base/allocator/type_profiler_tcmalloc.h"
62 #endif
63 #endif
64
65 #if !defined(OS_IOS)
66 #include "content/app/mojo/mojo_init.h"
67 #include "content/browser/gpu/gpu_process_host.h"
68 #include "content/browser/renderer_host/render_process_host_impl.h"
69 #include "content/browser/utility_process_host_impl.h"
70 #include "content/public/plugin/content_plugin_client.h"
71 #include "content/public/renderer/content_renderer_client.h"
72 #include "content/public/utility/content_utility_client.h"
73 #endif
74
75 #if defined(OS_WIN)
76 #include <malloc.h>
77 #include <cstring>
78
79 #include "base/strings/string_number_conversions.h"
80 #include "ui/base/win/atl_module.h"
81 #include "ui/base/win/dpi_setup.h"
82 #include "ui/gfx/win/dpi.h"
83 #elif defined(OS_MACOSX)
84 #include "base/mac/scoped_nsautorelease_pool.h"
85 #if !defined(OS_IOS)
86 #include "base/power_monitor/power_monitor_device_source.h"
87 #include "content/browser/mach_broker_mac.h"
88 #include "content/common/sandbox_init_mac.h"
89 #endif // !OS_IOS
90 #endif // OS_WIN
91
92 #if defined(OS_POSIX)
93 #include <signal.h>
94
95 #include "base/posix/global_descriptors.h"
96 #include "content/public/common/content_descriptors.h"
97
98 #if !defined(OS_MACOSX)
99 #include "content/public/common/zygote_fork_delegate_linux.h"
100 #endif
101 #if !defined(OS_MACOSX) && !defined(OS_ANDROID)
102 #include "content/zygote/zygote_main.h"
103 #endif
104
105 #endif // OS_POSIX
106
107 #if !defined(OS_MACOSX) && defined(USE_TCMALLOC)
108 extern "C" {
109 int tc_set_new_mode(int mode);
110 }
111 #endif
112
113 namespace content {
114 extern int GpuMain(const content::MainFunctionParams&);
115 #if defined(ENABLE_PLUGINS)
116 #if !defined(OS_LINUX)
117 extern int PluginMain(const content::MainFunctionParams&);
118 #endif
119 extern int PpapiPluginMain(const MainFunctionParams&);
120 extern int PpapiBrokerMain(const MainFunctionParams&);
121 #endif
122 extern int RendererMain(const content::MainFunctionParams&);
123 extern int UtilityMain(const MainFunctionParams&);
124 extern int WorkerMain(const MainFunctionParams&);
125 } // namespace content
126
127 namespace content {
128
129 base::LazyInstance<ContentBrowserClient>
130 g_empty_content_browser_client = LAZY_INSTANCE_INITIALIZER;
131 #if !defined(OS_IOS) && !defined(CHROME_MULTIPLE_DLL_BROWSER)
132 base::LazyInstance<ContentPluginClient>
133 g_empty_content_plugin_client = LAZY_INSTANCE_INITIALIZER;
134 base::LazyInstance<ContentRendererClient>
135 g_empty_content_renderer_client = LAZY_INSTANCE_INITIALIZER;
136 base::LazyInstance<ContentUtilityClient>
137 g_empty_content_utility_client = LAZY_INSTANCE_INITIALIZER;
138 #endif // !OS_IOS && !CHROME_MULTIPLE_DLL_BROWSER
139
140 #if defined(OS_WIN)
141
142 #endif // defined(OS_WIN)
143
144 #if defined(OS_POSIX) && !defined(OS_IOS)
145
146 // Setup signal-handling state: resanitize most signals, ignore SIGPIPE.
SetupSignalHandlers()147 void SetupSignalHandlers() {
148 // Sanitise our signal handling state. Signals that were ignored by our
149 // parent will also be ignored by us. We also inherit our parent's sigmask.
150 sigset_t empty_signal_set;
151 CHECK(0 == sigemptyset(&empty_signal_set));
152 CHECK(0 == sigprocmask(SIG_SETMASK, &empty_signal_set, NULL));
153
154 struct sigaction sigact;
155 memset(&sigact, 0, sizeof(sigact));
156 sigact.sa_handler = SIG_DFL;
157 static const int signals_to_reset[] =
158 {SIGHUP, SIGINT, SIGQUIT, SIGILL, SIGABRT, SIGFPE, SIGSEGV,
159 SIGALRM, SIGTERM, SIGCHLD, SIGBUS, SIGTRAP}; // SIGPIPE is set below.
160 for (unsigned i = 0; i < arraysize(signals_to_reset); i++) {
161 CHECK(0 == sigaction(signals_to_reset[i], &sigact, NULL));
162 }
163
164 // Always ignore SIGPIPE. We check the return value of write().
165 CHECK(signal(SIGPIPE, SIG_IGN) != SIG_ERR);
166 }
167
168 #endif // OS_POSIX && !OS_IOS
169
CommonSubprocessInit(const std::string & process_type)170 void CommonSubprocessInit(const std::string& process_type) {
171 #if defined(OS_WIN)
172 // HACK: Let Windows know that we have started. This is needed to suppress
173 // the IDC_APPSTARTING cursor from being displayed for a prolonged period
174 // while a subprocess is starting.
175 PostThreadMessage(GetCurrentThreadId(), WM_NULL, 0, 0);
176 MSG msg;
177 PeekMessage(&msg, NULL, 0, 0, PM_REMOVE);
178 #endif
179 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
180 // Various things break when you're using a locale where the decimal
181 // separator isn't a period. See e.g. bugs 22782 and 39964. For
182 // all processes except the browser process (where we call system
183 // APIs that may rely on the correct locale for formatting numbers
184 // when presenting them to the user), reset the locale for numeric
185 // formatting.
186 // Note that this is not correct for plugin processes -- they can
187 // surface UI -- but it's likely they get this wrong too so why not.
188 setlocale(LC_NUMERIC, "C");
189 #endif
190 }
191
192 // Only needed on Windows for creating stats tables.
193 #if defined(OS_WIN)
GetBrowserPid(const CommandLine & command_line)194 static base::ProcessId GetBrowserPid(const CommandLine& command_line) {
195 base::ProcessId browser_pid = base::GetCurrentProcId();
196 if (command_line.HasSwitch(switches::kProcessChannelID)) {
197 std::string channel_name =
198 command_line.GetSwitchValueASCII(switches::kProcessChannelID);
199
200 int browser_pid_int;
201 base::StringToInt(channel_name, &browser_pid_int);
202 browser_pid = static_cast<base::ProcessId>(browser_pid_int);
203 DCHECK_NE(browser_pid_int, 0);
204 }
205 return browser_pid;
206 }
207 #endif
208
InitializeStatsTable(const CommandLine & command_line)209 static void InitializeStatsTable(const CommandLine& command_line) {
210 // Initialize the Stats Counters table. With this initialized,
211 // the StatsViewer can be utilized to read counters outside of
212 // Chrome. These lines can be commented out to effectively turn
213 // counters 'off'. The table is created and exists for the life
214 // of the process. It is not cleaned up.
215 if (command_line.HasSwitch(switches::kEnableStatsTable)) {
216 // NOTIMPLEMENTED: we probably need to shut this down correctly to avoid
217 // leaking shared memory regions on posix platforms.
218 #if defined(OS_POSIX)
219 // Stats table is in the global file descriptors table on Posix.
220 base::GlobalDescriptors* global_descriptors =
221 base::GlobalDescriptors::GetInstance();
222 base::FileDescriptor table_ident;
223 if (global_descriptors->MaybeGet(kStatsTableSharedMemFd) != -1) {
224 // Open the shared memory file descriptor passed by the browser process.
225 table_ident = base::FileDescriptor(
226 global_descriptors->Get(kStatsTableSharedMemFd), false);
227 }
228 #elif defined(OS_WIN)
229 // Stats table is in a named segment on Windows. Use the PID to make this
230 // unique on the system.
231 std::string table_ident =
232 base::StringPrintf("%s-%u", kStatsFilename,
233 static_cast<unsigned int>(GetBrowserPid(command_line)));
234 #endif
235 base::StatsTable* stats_table =
236 new base::StatsTable(table_ident, kStatsMaxThreads, kStatsMaxCounters);
237 base::StatsTable::set_current(stats_table);
238 }
239 }
240
241 class ContentClientInitializer {
242 public:
Set(const std::string & process_type,ContentMainDelegate * delegate)243 static void Set(const std::string& process_type,
244 ContentMainDelegate* delegate) {
245 ContentClient* content_client = GetContentClient();
246 if (process_type.empty()) {
247 if (delegate)
248 content_client->browser_ = delegate->CreateContentBrowserClient();
249 if (!content_client->browser_)
250 content_client->browser_ = &g_empty_content_browser_client.Get();
251 }
252
253 #if !defined(OS_IOS) && !defined(CHROME_MULTIPLE_DLL_BROWSER)
254 if (process_type == switches::kPluginProcess ||
255 process_type == switches::kPpapiPluginProcess) {
256 if (delegate)
257 content_client->plugin_ = delegate->CreateContentPluginClient();
258 if (!content_client->plugin_)
259 content_client->plugin_ = &g_empty_content_plugin_client.Get();
260 // Single process not supported in split dll mode.
261 } else if (process_type == switches::kRendererProcess ||
262 CommandLine::ForCurrentProcess()->HasSwitch(
263 switches::kSingleProcess)) {
264 if (delegate)
265 content_client->renderer_ = delegate->CreateContentRendererClient();
266 if (!content_client->renderer_)
267 content_client->renderer_ = &g_empty_content_renderer_client.Get();
268 }
269
270 if (process_type == switches::kUtilityProcess ||
271 CommandLine::ForCurrentProcess()->HasSwitch(
272 switches::kSingleProcess)) {
273 if (delegate)
274 content_client->utility_ = delegate->CreateContentUtilityClient();
275 // TODO(scottmg): http://crbug.com/237249 Should be in _child.
276 if (!content_client->utility_)
277 content_client->utility_ = &g_empty_content_utility_client.Get();
278 }
279 #endif // !OS_IOS && !CHROME_MULTIPLE_DLL_BROWSER
280 }
281 };
282
283 // We dispatch to a process-type-specific FooMain() based on a command-line
284 // flag. This struct is used to build a table of (flag, main function) pairs.
285 struct MainFunction {
286 const char* name;
287 int (*function)(const MainFunctionParams&);
288 };
289
290 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
291 // On platforms that use the zygote, we have a special subset of
292 // subprocesses that are launched via the zygote. This function
293 // fills in some process-launching bits around ZygoteMain().
294 // Returns the exit code of the subprocess.
RunZygote(const MainFunctionParams & main_function_params,ContentMainDelegate * delegate)295 int RunZygote(const MainFunctionParams& main_function_params,
296 ContentMainDelegate* delegate) {
297 static const MainFunction kMainFunctions[] = {
298 { switches::kRendererProcess, RendererMain },
299 { switches::kWorkerProcess, WorkerMain },
300 #if defined(ENABLE_PLUGINS)
301 { switches::kPpapiPluginProcess, PpapiPluginMain },
302 #endif
303 { switches::kUtilityProcess, UtilityMain },
304 };
305
306 ScopedVector<ZygoteForkDelegate> zygote_fork_delegates;
307 if (delegate) {
308 delegate->ZygoteStarting(&zygote_fork_delegates);
309 // Each Renderer we spawn will re-attempt initialization of the media
310 // libraries, at which point failure will be detected and handled, so
311 // we do not need to cope with initialization failures here.
312 base::FilePath media_path;
313 if (PathService::Get(DIR_MEDIA_LIBS, &media_path))
314 media::InitializeMediaLibrary(media_path);
315 }
316
317 // This function call can return multiple times, once per fork().
318 if (!ZygoteMain(main_function_params, zygote_fork_delegates.Pass()))
319 return 1;
320
321 if (delegate) delegate->ZygoteForked();
322
323 // Zygote::HandleForkRequest may have reallocated the command
324 // line so update it here with the new version.
325 const CommandLine& command_line = *CommandLine::ForCurrentProcess();
326 std::string process_type =
327 command_line.GetSwitchValueASCII(switches::kProcessType);
328 ContentClientInitializer::Set(process_type, delegate);
329
330 // The StatsTable must be initialized in each process; we already
331 // initialized for the browser process, now we need to initialize
332 // within the new processes as well.
333 InitializeStatsTable(command_line);
334
335 MainFunctionParams main_params(command_line);
336
337 for (size_t i = 0; i < arraysize(kMainFunctions); ++i) {
338 if (process_type == kMainFunctions[i].name)
339 return kMainFunctions[i].function(main_params);
340 }
341
342 if (delegate)
343 return delegate->RunProcess(process_type, main_params);
344
345 NOTREACHED() << "Unknown zygote process type: " << process_type;
346 return 1;
347 }
348 #endif // defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
349
350 #if !defined(OS_IOS)
RegisterMainThreadFactories()351 static void RegisterMainThreadFactories() {
352 #if !defined(CHROME_MULTIPLE_DLL_BROWSER)
353 UtilityProcessHostImpl::RegisterUtilityMainThreadFactory(
354 CreateInProcessUtilityThread);
355 RenderProcessHostImpl::RegisterRendererMainThreadFactory(
356 CreateInProcessRendererThread);
357 GpuProcessHost::RegisterGpuMainThreadFactory(
358 CreateInProcessGpuThread);
359 #else
360 CommandLine& command_line = *CommandLine::ForCurrentProcess();
361 if (command_line.HasSwitch(switches::kSingleProcess)) {
362 LOG(FATAL) <<
363 "--single-process is not supported in chrome multiple dll browser.";
364 }
365 if (command_line.HasSwitch(switches::kInProcessGPU)) {
366 LOG(FATAL) <<
367 "--in-process-gpu is not supported in chrome multiple dll browser.";
368 }
369 #endif
370 }
371
372 // Run the FooMain() for a given process type.
373 // If |process_type| is empty, runs BrowserMain().
374 // Returns the exit code for this process.
RunNamedProcessTypeMain(const std::string & process_type,const MainFunctionParams & main_function_params,ContentMainDelegate * delegate)375 int RunNamedProcessTypeMain(
376 const std::string& process_type,
377 const MainFunctionParams& main_function_params,
378 ContentMainDelegate* delegate) {
379 static const MainFunction kMainFunctions[] = {
380 #if !defined(CHROME_MULTIPLE_DLL_CHILD)
381 { "", BrowserMain },
382 #endif
383 #if !defined(CHROME_MULTIPLE_DLL_BROWSER)
384 #if defined(ENABLE_PLUGINS)
385 #if !defined(OS_LINUX)
386 { switches::kPluginProcess, PluginMain },
387 #endif
388 { switches::kWorkerProcess, WorkerMain },
389 { switches::kPpapiPluginProcess, PpapiPluginMain },
390 { switches::kPpapiBrokerProcess, PpapiBrokerMain },
391 #endif // ENABLE_PLUGINS
392 { switches::kUtilityProcess, UtilityMain },
393 { switches::kRendererProcess, RendererMain },
394 { switches::kGpuProcess, GpuMain },
395 #endif // !CHROME_MULTIPLE_DLL_BROWSER
396 };
397
398 RegisterMainThreadFactories();
399
400 for (size_t i = 0; i < arraysize(kMainFunctions); ++i) {
401 if (process_type == kMainFunctions[i].name) {
402 if (delegate) {
403 int exit_code = delegate->RunProcess(process_type,
404 main_function_params);
405 #if defined(OS_ANDROID)
406 // In Android's browser process, the negative exit code doesn't mean the
407 // default behavior should be used as the UI message loop is managed by
408 // the Java and the browser process's default behavior is always
409 // overridden.
410 if (process_type.empty())
411 return exit_code;
412 #endif
413 if (exit_code >= 0)
414 return exit_code;
415 }
416 return kMainFunctions[i].function(main_function_params);
417 }
418 }
419
420 #if defined(OS_POSIX) && !defined(OS_MACOSX) && !defined(OS_ANDROID)
421 // Zygote startup is special -- see RunZygote comments above
422 // for why we don't use ZygoteMain directly.
423 if (process_type == switches::kZygoteProcess)
424 return RunZygote(main_function_params, delegate);
425 #endif
426
427 // If it's a process we don't know about, the embedder should know.
428 if (delegate)
429 return delegate->RunProcess(process_type, main_function_params);
430
431 NOTREACHED() << "Unknown process type: " << process_type;
432 return 1;
433 }
434 #endif // !OS_IOS
435
436 class ContentMainRunnerImpl : public ContentMainRunner {
437 public:
ContentMainRunnerImpl()438 ContentMainRunnerImpl()
439 : is_initialized_(false),
440 is_shutdown_(false),
441 completed_basic_startup_(false),
442 delegate_(NULL),
443 ui_task_(NULL) {
444 #if defined(OS_WIN)
445 memset(&sandbox_info_, 0, sizeof(sandbox_info_));
446 #endif
447 }
448
~ContentMainRunnerImpl()449 virtual ~ContentMainRunnerImpl() {
450 if (is_initialized_ && !is_shutdown_)
451 Shutdown();
452 }
453
454 #if defined(USE_TCMALLOC)
GetAllocatorWasteSizeThunk(size_t * size)455 static bool GetAllocatorWasteSizeThunk(size_t* size) {
456 size_t heap_size, allocated_bytes, unmapped_bytes;
457 MallocExtension* ext = MallocExtension::instance();
458 if (ext->GetNumericProperty("generic.heap_size", &heap_size) &&
459 ext->GetNumericProperty("generic.current_allocated_bytes",
460 &allocated_bytes) &&
461 ext->GetNumericProperty("tcmalloc.pageheap_unmapped_bytes",
462 &unmapped_bytes)) {
463 *size = heap_size - allocated_bytes - unmapped_bytes;
464 return true;
465 }
466 DCHECK(false);
467 return false;
468 }
469
GetStatsThunk(char * buffer,int buffer_length)470 static void GetStatsThunk(char* buffer, int buffer_length) {
471 MallocExtension::instance()->GetStats(buffer, buffer_length);
472 }
473
ReleaseFreeMemoryThunk()474 static void ReleaseFreeMemoryThunk() {
475 MallocExtension::instance()->ReleaseFreeMemory();
476 }
477 #endif
478
Initialize(const ContentMainParams & params)479 virtual int Initialize(const ContentMainParams& params) OVERRIDE {
480 ui_task_ = params.ui_task;
481
482 #if defined(OS_WIN)
483 RegisterInvalidParamHandler();
484 ui::win::CreateATLModuleIfNeeded();
485
486 sandbox_info_ = *params.sandbox_info;
487 #else // !OS_WIN
488
489 #if defined(OS_ANDROID)
490 // See note at the initialization of ExitManager, below; basically,
491 // only Android builds have the ctor/dtor handlers set up to use
492 // TRACE_EVENT right away.
493 TRACE_EVENT0("startup", "ContentMainRunnerImpl::Initialize");
494 #endif // OS_ANDROID
495
496 // NOTE(willchan): One might ask why these TCMalloc-related calls are done
497 // here rather than in process_util_linux.cc with the definition of
498 // EnableTerminationOnOutOfMemory(). That's because base shouldn't have a
499 // dependency on TCMalloc. Really, we ought to have our allocator shim code
500 // implement this EnableTerminationOnOutOfMemory() function. Whateverz.
501 // This works for now.
502 #if !defined(OS_MACOSX) && defined(USE_TCMALLOC)
503
504 #if defined(TYPE_PROFILING)
505 base::type_profiler::InterceptFunctions::SetFunctions(
506 base::type_profiler::NewInterceptForTCMalloc,
507 base::type_profiler::DeleteInterceptForTCMalloc);
508 #endif
509
510 // For tcmalloc, we need to tell it to behave like new.
511 tc_set_new_mode(1);
512
513 // On windows, we've already set these thunks up in _heap_init()
514 base::allocator::SetGetAllocatorWasteSizeFunction(
515 GetAllocatorWasteSizeThunk);
516 base::allocator::SetGetStatsFunction(GetStatsThunk);
517 base::allocator::SetReleaseFreeMemoryFunction(ReleaseFreeMemoryThunk);
518
519 // Provide optional hook for monitoring allocation quantities on a
520 // per-thread basis. Only set the hook if the environment indicates this
521 // needs to be enabled.
522 const char* profiling = getenv(tracked_objects::kAlternateProfilerTime);
523 if (profiling &&
524 (atoi(profiling) == tracked_objects::TIME_SOURCE_TYPE_TCMALLOC)) {
525 tracked_objects::SetAlternateTimeSource(
526 MallocExtension::GetBytesAllocatedOnCurrentThread,
527 tracked_objects::TIME_SOURCE_TYPE_TCMALLOC);
528 }
529 #endif // !OS_MACOSX && USE_TCMALLOC
530
531 // On Android,
532 // - setlocale() is not supported.
533 // - We do not override the signal handlers so that we can get
534 // stack trace when crashing.
535 // - The ipc_fd is passed through the Java service.
536 // Thus, these are all disabled.
537 #if !defined(OS_ANDROID) && !defined(OS_IOS)
538 // Set C library locale to make sure CommandLine can parse argument values
539 // in correct encoding.
540 setlocale(LC_ALL, "");
541
542 SetupSignalHandlers();
543
544 base::GlobalDescriptors* g_fds = base::GlobalDescriptors::GetInstance();
545 g_fds->Set(kPrimaryIPCChannel,
546 kPrimaryIPCChannel + base::GlobalDescriptors::kBaseDescriptor);
547 #endif // !OS_ANDROID && !OS_IOS
548
549 #if defined(OS_LINUX) || defined(OS_OPENBSD)
550 g_fds->Set(kCrashDumpSignal,
551 kCrashDumpSignal + base::GlobalDescriptors::kBaseDescriptor);
552 #endif
553
554 #endif // !OS_WIN
555
556 is_initialized_ = true;
557 delegate_ = params.delegate;
558
559 base::EnableTerminationOnHeapCorruption();
560 base::EnableTerminationOnOutOfMemory();
561
562 // The exit manager is in charge of calling the dtors of singleton objects.
563 // On Android, AtExitManager is set up when library is loaded.
564 // On iOS, it's set up in main(), which can't call directly through to here.
565 // A consequence of this is that you can't use the ctor/dtor-based
566 // TRACE_EVENT methods on Linux or iOS builds till after we set this up.
567 #if !defined(OS_ANDROID) && !defined(OS_IOS)
568 if (!ui_task_) {
569 // When running browser tests, don't create a second AtExitManager as that
570 // interfers with shutdown when objects created before ContentMain is
571 // called are destructed when it returns.
572 exit_manager_.reset(new base::AtExitManager);
573 }
574 #endif // !OS_ANDROID && !OS_IOS
575
576 #if defined(OS_MACOSX)
577 // We need this pool for all the objects created before we get to the
578 // event loop, but we don't want to leave them hanging around until the
579 // app quits. Each "main" needs to flush this pool right before it goes into
580 // its main event loop to get rid of the cruft.
581 autorelease_pool_.reset(new base::mac::ScopedNSAutoreleasePool());
582 #endif
583
584 // On Android, the command line is initialized when library is loaded and
585 // we have already started our TRACE_EVENT0.
586 #if !defined(OS_ANDROID)
587 // argc/argv are ignored on Windows and Android; see command_line.h for
588 // details.
589 int argc = 0;
590 const char** argv = NULL;
591
592 #if !defined(OS_WIN)
593 argc = params.argc;
594 argv = params.argv;
595 #endif
596
597 CommandLine::Init(argc, argv);
598
599 #if !defined(OS_IOS)
600 SetProcessTitleFromCommandLine(argv);
601 #endif
602 #endif // !OS_ANDROID
603
604 int exit_code;
605 if (delegate_ && delegate_->BasicStartupComplete(&exit_code))
606 return exit_code;
607
608 completed_basic_startup_ = true;
609
610 const CommandLine& command_line = *CommandLine::ForCurrentProcess();
611 std::string process_type =
612 command_line.GetSwitchValueASCII(switches::kProcessType);
613
614 #if !defined(OS_IOS)
615 // Initialize mojo here so that services can be registered.
616 InitializeMojo();
617 #endif
618
619 if (!GetContentClient())
620 SetContentClient(&empty_content_client_);
621 ContentClientInitializer::Set(process_type, delegate_);
622
623 #if defined(OS_WIN)
624 // Route stdio to parent console (if any) or create one.
625 if (command_line.HasSwitch(switches::kEnableLogging))
626 base::RouteStdioToConsole();
627 #endif
628
629 // Enable startup tracing asap to avoid early TRACE_EVENT calls being
630 // ignored.
631 if (command_line.HasSwitch(switches::kTraceStartup)) {
632 base::debug::CategoryFilter category_filter(
633 command_line.GetSwitchValueASCII(switches::kTraceStartup));
634 base::debug::TraceLog::GetInstance()->SetEnabled(
635 category_filter,
636 base::debug::TraceLog::RECORDING_MODE,
637 base::debug::TraceLog::RECORD_UNTIL_FULL);
638 }
639 #if !defined(OS_ANDROID)
640 // Android tracing started at the beginning of the method.
641 // Other OSes have to wait till we get here in order for all the memory
642 // management setup to be completed.
643 TRACE_EVENT0("startup", "ContentMainRunnerImpl::Initialize");
644 #endif // !OS_ANDROID
645
646 #if defined(OS_MACOSX) && !defined(OS_IOS)
647 // We need to allocate the IO Ports before the Sandbox is initialized or
648 // the first instance of PowerMonitor is created.
649 // It's important not to allocate the ports for processes which don't
650 // register with the power monitor - see crbug.com/88867.
651 if (process_type.empty() ||
652 (delegate_ &&
653 delegate_->ProcessRegistersWithSystemProcess(process_type))) {
654 base::PowerMonitorDeviceSource::AllocateSystemIOPorts();
655 }
656
657 if (!process_type.empty() &&
658 (!delegate_ || delegate_->ShouldSendMachPort(process_type))) {
659 MachBroker::ChildSendTaskPortToParent();
660 }
661 #elif defined(OS_WIN)
662 if (command_line.HasSwitch(switches::kEnableHighResolutionTime))
663 base::TimeTicks::SetNowIsHighResNowIfSupported();
664
665 bool init_device_scale_factor = true;
666 if (command_line.HasSwitch(switches::kDeviceScaleFactor)) {
667 std::string scale_factor_string = command_line.GetSwitchValueASCII(
668 switches::kDeviceScaleFactor);
669 double scale_factor = 0;
670 if (base::StringToDouble(scale_factor_string, &scale_factor)) {
671 init_device_scale_factor = false;
672 gfx::InitDeviceScaleFactor(scale_factor);
673 }
674 }
675 if (init_device_scale_factor)
676 ui::win::InitDeviceScaleFactor();
677
678 SetupCRT(command_line);
679 #endif
680
681 #if defined(OS_POSIX)
682 if (!process_type.empty()) {
683 // When you hit Ctrl-C in a terminal running the browser
684 // process, a SIGINT is delivered to the entire process group.
685 // When debugging the browser process via gdb, gdb catches the
686 // SIGINT for the browser process (and dumps you back to the gdb
687 // console) but doesn't for the child processes, killing them.
688 // The fix is to have child processes ignore SIGINT; they'll die
689 // on their own when the browser process goes away.
690 //
691 // Note that we *can't* rely on BeingDebugged to catch this case because
692 // we are the child process, which is not being debugged.
693 // TODO(evanm): move this to some shared subprocess-init function.
694 if (!base::debug::BeingDebugged())
695 signal(SIGINT, SIG_IGN);
696 }
697 #endif
698
699 #if defined(USE_NSS)
700 crypto::EarlySetupForNSSInit();
701 #endif
702
703 ui::RegisterPathProvider();
704 RegisterPathProvider();
705 RegisterContentSchemes(true);
706
707 #if defined(OS_ANDROID)
708 int icudata_fd = base::GlobalDescriptors::GetInstance()->MaybeGet(
709 kAndroidICUDataDescriptor);
710 if (icudata_fd != -1)
711 CHECK(base::i18n::InitializeICUWithFileDescriptor(icudata_fd));
712 else
713 CHECK(base::i18n::InitializeICU());
714 #else
715 CHECK(base::i18n::InitializeICU());
716 #endif
717
718 InitializeStatsTable(command_line);
719
720 if (delegate_)
721 delegate_->PreSandboxStartup();
722
723 if (!process_type.empty())
724 CommonSubprocessInit(process_type);
725
726 #if defined(OS_WIN)
727 CHECK(InitializeSandbox(params.sandbox_info));
728 #elif defined(OS_MACOSX) && !defined(OS_IOS)
729 if (process_type == switches::kRendererProcess ||
730 process_type == switches::kPpapiPluginProcess ||
731 (delegate_ && delegate_->DelaySandboxInitialization(process_type))) {
732 // On OS X the renderer sandbox needs to be initialized later in the
733 // startup sequence in RendererMainPlatformDelegate::EnableSandbox().
734 } else {
735 CHECK(InitializeSandbox());
736 }
737 #endif
738
739 if (delegate_)
740 delegate_->SandboxInitialized(process_type);
741
742 // Return -1 to indicate no early termination.
743 return -1;
744 }
745
Run()746 virtual int Run() OVERRIDE {
747 DCHECK(is_initialized_);
748 DCHECK(!is_shutdown_);
749 const CommandLine& command_line = *CommandLine::ForCurrentProcess();
750 std::string process_type =
751 command_line.GetSwitchValueASCII(switches::kProcessType);
752
753 MainFunctionParams main_params(command_line);
754 main_params.ui_task = ui_task_;
755 #if defined(OS_WIN)
756 main_params.sandbox_info = &sandbox_info_;
757 #elif defined(OS_MACOSX)
758 main_params.autorelease_pool = autorelease_pool_.get();
759 #endif
760
761 #if !defined(OS_IOS)
762 return RunNamedProcessTypeMain(process_type, main_params, delegate_);
763 #else
764 return 1;
765 #endif
766 }
767
Shutdown()768 virtual void Shutdown() OVERRIDE {
769 DCHECK(is_initialized_);
770 DCHECK(!is_shutdown_);
771
772 if (completed_basic_startup_ && delegate_) {
773 const CommandLine& command_line = *CommandLine::ForCurrentProcess();
774 std::string process_type =
775 command_line.GetSwitchValueASCII(switches::kProcessType);
776
777 delegate_->ProcessExiting(process_type);
778 }
779
780 #if defined(OS_WIN)
781 #ifdef _CRTDBG_MAP_ALLOC
782 _CrtDumpMemoryLeaks();
783 #endif // _CRTDBG_MAP_ALLOC
784 #endif // OS_WIN
785
786 #if defined(OS_MACOSX)
787 autorelease_pool_.reset(NULL);
788 #endif
789
790 exit_manager_.reset(NULL);
791
792 delegate_ = NULL;
793 is_shutdown_ = true;
794 }
795
796 private:
797 // True if the runner has been initialized.
798 bool is_initialized_;
799
800 // True if the runner has been shut down.
801 bool is_shutdown_;
802
803 // True if basic startup was completed.
804 bool completed_basic_startup_;
805
806 // Used if the embedder doesn't set one.
807 ContentClient empty_content_client_;
808
809 // The delegate will outlive this object.
810 ContentMainDelegate* delegate_;
811
812 scoped_ptr<base::AtExitManager> exit_manager_;
813 #if defined(OS_WIN)
814 sandbox::SandboxInterfaceInfo sandbox_info_;
815 #elif defined(OS_MACOSX)
816 scoped_ptr<base::mac::ScopedNSAutoreleasePool> autorelease_pool_;
817 #endif
818
819 base::Closure* ui_task_;
820
821 DISALLOW_COPY_AND_ASSIGN(ContentMainRunnerImpl);
822 };
823
824 // static
Create()825 ContentMainRunner* ContentMainRunner::Create() {
826 return new ContentMainRunnerImpl();
827 }
828
829 } // namespace content
830