mojo/runner/android/main.cc

   1 // Copyright 2013 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 "mojo/runner/android/main.h"
   6
   7 #include "base/android/fifo_utils.h"
   8 #include "base/android/jni_android.h"
   9 #include "base/android/jni_array.h"
  10 #include "base/android/jni_string.h"
  11 #include "base/at_exit.h"
  12 #include "base/bind.h"
  13 #include "base/command_line.h"
  14 #include "base/debug/stack_trace.h"
  15 #include "base/files/file_path.h"
  16 #include "base/files/file_util.h"
  17 #include "base/lazy_instance.h"
  18 #include "base/logging.h"
  19 #include "base/macros.h"
  20 #include "base/message_loop/message_loop.h"
  21 #include "base/run_loop.h"
  22 #include "build/build_config.h"
  23 #include "components/view_manager/android_loader.h"
  24 #include "jni/ShellMain_jni.h"
  25 #include "mojo/message_pump/message_pump_mojo.h"
  26 #include "mojo/runner/android/android_handler_loader.h"
  27 #include "mojo/runner/android/background_application_loader.h"
  28 #include "mojo/runner/android/context_init.h"
  29 #include "mojo/runner/android/ui_application_loader_android.h"
  30 #include "mojo/runner/child_process.h"
  31 #include "mojo/runner/context.h"
  32 #include "mojo/runner/init.h"
  33 #include "mojo/shell/application_loader.h"
  34 #include "ui/gl/gl_surface_egl.h"
  35
  36 using base::LazyInstance;
  37
  38 namespace mojo {
  39 namespace runner {
  40
  41 namespace {
  42
  43 // Tag for logging.
  44 const char kLogTag[] = "chromium";
  45
  46 // Command line argument for the communication fifo.
  47 const char kFifoPath[] = "fifo-path";
  48
  49 LazyInstance<scoped_ptr<base::MessageLoop>> g_java_message_loop =
  50     LAZY_INSTANCE_INITIALIZER;
  51
  52 LazyInstance<scoped_ptr<Context>> g_context = LAZY_INSTANCE_INITIALIZER;
  53
  54 LazyInstance<base::android::ScopedJavaGlobalRef<jobject>> g_main_activiy =
  55     LAZY_INSTANCE_INITIALIZER;
  56
  57 void ConfigureAndroidServices(Context* context) {
  58   context->application_manager()->SetLoaderForURL(
  59       make_scoped_ptr(new UIApplicationLoader(
  60           make_scoped_ptr(new view_manager::AndroidLoader()),
  61           g_java_message_loop.Get().get())),
  62       GURL("mojo:view_manager"));
  63
  64   // Android handler is bundled with the Mojo shell, because it uses the
  65   // MojoShell application as the JNI bridge to bootstrap execution of other
  66   // Android Mojo apps that need JNI.
  67   context->application_manager()->SetLoaderForURL(
  68       make_scoped_ptr(new BackgroundApplicationLoader(
  69           make_scoped_ptr(new AndroidHandlerLoader()), "android_handler",
  70           base::MessageLoop::TYPE_DEFAULT)),
  71       GURL("mojo:android_handler"));
  72 }
  73
  74 void ExitShell() {
  75   Java_ShellMain_finishActivity(base::android::AttachCurrentThread(),
  76                                 g_main_activiy.Get().obj());
  77   exit(0);
  78 }
  79
  80 // Initialize stdout redirection if the command line switch is present.
  81 void InitializeRedirection() {
  82   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(kFifoPath))
  83     return;
  84
  85   base::FilePath fifo_path =
  86       base::CommandLine::ForCurrentProcess()->GetSwitchValuePath(kFifoPath);
  87   base::FilePath directory = fifo_path.DirName();
  88   CHECK(base::CreateDirectoryAndGetError(directory, nullptr))
  89       << "Unable to create directory: " << directory.value();
  90   unlink(fifo_path.value().c_str());
  91   CHECK(base::android::CreateFIFO(fifo_path, 0666))
  92       << "Unable to create fifo: " << fifo_path.value();
  93   CHECK(base::android::RedirectStream(stdout, fifo_path, "w"))
  94       << "Failed to redirect stdout to file: " << fifo_path.value();
  95   CHECK(dup2(STDOUT_FILENO, STDERR_FILENO) != -1)
  96       << "Unable to redirect stderr to stdout.";
  97 }
  98
  99 }  // namespace
 100
 101 static void Init(JNIEnv* env,
 102                  const JavaParamRef<jclass>& clazz,
 103                  const JavaParamRef<jobject>& activity,
 104                  const JavaParamRef<jstring>& mojo_shell_path,
 105                  const JavaParamRef<jobjectArray>& jparameters,
 106                  const JavaParamRef<jstring>& j_local_apps_directory,
 107                  const JavaParamRef<jstring>& j_tmp_dir) {
 108   g_main_activiy.Get().Reset(env, activity);
 109
 110   // Setting the TMPDIR environment variable so that applications can use it.
 111   // TODO(qsr) We will need our subprocesses to inherit this.
 112   int return_value =
 113       setenv("TMPDIR",
 114              base::android::ConvertJavaStringToUTF8(env, j_tmp_dir).c_str(), 1);
 115   DCHECK_EQ(return_value, 0);
 116
 117   base::android::InitApplicationContext(env, activity);
 118
 119   std::vector<std::string> parameters;
 120   parameters.push_back(
 121       base::android::ConvertJavaStringToUTF8(env, mojo_shell_path));
 122   base::android::AppendJavaStringArrayToStringVector(env, jparameters,
 123                                                      &parameters);
 124   base::CommandLine::Init(0, nullptr);
 125   base::CommandLine::ForCurrentProcess()->InitFromArgv(parameters);
 126
 127   InitializeLogging();
 128   mojo::runner::WaitForDebuggerIfNecessary();
 129
 130   InitializeRedirection();
 131
 132   // We want ~MessageLoop to happen prior to ~Context. Initializing
 133   // LazyInstances is akin to stack-allocating objects; their destructors
 134   // will be invoked first-in-last-out.
 135   Context* shell_context = new Context();
 136   shell_context->SetShellFileRoot(base::FilePath(
 137       base::android::ConvertJavaStringToUTF8(env, j_local_apps_directory)));
 138   g_context.Get().reset(shell_context);
 139
 140   g_java_message_loop.Get().reset(new base::MessageLoopForUI);
 141   base::MessageLoopForUI::current()->Start();
 142
 143   ConfigureAndroidServices(shell_context);
 144   shell_context->Init();
 145
 146   // This is done after the main message loop is started since it may post
 147   // tasks. This is consistent with the ordering from the desktop version of
 148   // this file (../desktop/launcher_process.cc).
 149   InitContext(shell_context);
 150
 151   // TODO(abarth): At which point should we switch to cross-platform
 152   // initialization?
 153
 154   gfx::GLSurface::InitializeOneOff();
 155 }
 156
 157 static void Start(JNIEnv* env, const JavaParamRef<jclass>& clazz) {
 158 #if defined(MOJO_SHELL_DEBUG_URL)
 159   base::CommandLine::ForCurrentProcess()->AppendArg(MOJO_SHELL_DEBUG_URL);
 160   // Sleep for 5 seconds to give the debugger a chance to attach.
 161   sleep(5);
 162 #endif
 163
 164   Context* context = g_context.Pointer()->get();
 165   context->RunCommandLineApplication(base::Bind(ExitShell));
 166 }
 167
 168 static void AddApplicationURL(JNIEnv* env,
 169                               const JavaParamRef<jclass>& clazz,
 170                               const JavaParamRef<jstring>& jurl) {
 171   base::CommandLine::ForCurrentProcess()->AppendArg(
 172       base::android::ConvertJavaStringToUTF8(env, jurl));
 173 }
 174
 175 bool RegisterShellMain(JNIEnv* env) {
 176   return RegisterNativesImpl(env);
 177 }
 178
 179 Context* GetContext() {
 180   return g_context.Get().get();
 181 }
 182
 183 }  // namespace runner
 184 }  // namespace mojo
 185
 186 int main(int argc, char** argv) {
 187   base::AtExitManager at_exit;
 188   base::CommandLine::Init(argc, argv);
 189
 190 #if !defined(OFFICIAL_BUILD)
 191   base::debug::EnableInProcessStackDumping();
 192 #endif
 193
 194   mojo::runner::InitializeLogging();
 195   return mojo::runner::ChildProcessMain();
 196 }