content/app/android/child_process_service.cc

   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/app/android/child_process_service.h"
   6
   7 #include <android/native_window_jni.h>
   8 #include <cpu-features.h>
   9
  10 #include "base/android/jni_array.h"
  11 #include "base/android/library_loader/library_loader_hooks.h"
  12 #include "base/android/memory_pressure_listener_android.h"
  13 #include "base/logging.h"
  14 #include "base/posix/global_descriptors.h"
  15 #include "content/child/child_thread_impl.h"
  16 #include "content/common/android/surface_texture_manager.h"
  17 #include "content/common/android/surface_texture_peer.h"
  18 #include "content/common/gpu/gpu_surface_lookup.h"
  19 #include "content/public/common/content_descriptors.h"
  20 #include "ipc/ipc_descriptors.h"
  21 #include "jni/ChildProcessService_jni.h"
  22 #include "ui/gl/android/scoped_java_surface.h"
  23
  24 using base::android::AttachCurrentThread;
  25 using base::android::CheckException;
  26 using base::android::JavaIntArrayToIntVector;
  27
  28 namespace content {
  29
  30 namespace {
  31
  32 // TODO(sievers): Use two different implementations of this depending on if
  33 // we're in a renderer or gpu process.
  34 class SurfaceTextureManagerImpl : public SurfaceTextureManager,
  35                                   public SurfaceTexturePeer,
  36                                   public GpuSurfaceLookup {
  37  public:
  38   // |service| is the instance of
  39   // org.chromium.content.app.ChildProcessService.
  40   explicit SurfaceTextureManagerImpl(
  41       const base::android::ScopedJavaLocalRef<jobject>& service)
  42       : service_(service) {
  43     SurfaceTexturePeer::InitInstance(this);
  44     GpuSurfaceLookup::InitInstance(this);
  45   }
  46   ~SurfaceTextureManagerImpl() override {
  47     SurfaceTexturePeer::InitInstance(NULL);
  48     GpuSurfaceLookup::InitInstance(NULL);
  49   }
  50
  51   // Overridden from SurfaceTextureManager:
  52   void RegisterSurfaceTexture(int surface_texture_id,
  53                               int client_id,
  54                               gfx::SurfaceTexture* surface_texture) override {
  55     JNIEnv* env = base::android::AttachCurrentThread();
  56     Java_ChildProcessService_createSurfaceTextureSurface(
  57         env,
  58         service_.obj(),
  59         surface_texture_id,
  60         client_id,
  61         surface_texture->j_surface_texture().obj());
  62   }
  63   void UnregisterSurfaceTexture(int surface_texture_id,
  64                                 int client_id) override {
  65     JNIEnv* env = base::android::AttachCurrentThread();
  66     Java_ChildProcessService_destroySurfaceTextureSurface(
  67         env, service_.obj(), surface_texture_id, client_id);
  68   }
  69   gfx::AcceleratedWidget AcquireNativeWidgetForSurfaceTexture(
  70       int surface_texture_id) override {
  71     JNIEnv* env = base::android::AttachCurrentThread();
  72     gfx::ScopedJavaSurface surface(
  73         Java_ChildProcessService_getSurfaceTextureSurface(env, service_.obj(),
  74                                                           surface_texture_id));
  75
  76     if (surface.j_surface().is_null())
  77       return NULL;
  78
  79     // Note: This ensures that any local references used by
  80     // ANativeWindow_fromSurface are released immediately. This is needed as a
  81     // workaround for https://code.google.com/p/android/issues/detail?id=68174
  82     base::android::ScopedJavaLocalFrame scoped_local_reference_frame(env);
  83     ANativeWindow* native_window =
  84         ANativeWindow_fromSurface(env, surface.j_surface().obj());
  85
  86     return native_window;
  87   }
  88
  89   // Overridden from SurfaceTexturePeer:
  90   void EstablishSurfaceTexturePeer(
  91       base::ProcessHandle pid,
  92       scoped_refptr<gfx::SurfaceTexture> surface_texture,
  93       int primary_id,
  94       int secondary_id) override {
  95     JNIEnv* env = base::android::AttachCurrentThread();
  96     content::Java_ChildProcessService_establishSurfaceTexturePeer(
  97         env,
  98         service_.obj(),
  99         pid,
 100         surface_texture->j_surface_texture().obj(),
 101         primary_id,
 102         secondary_id);
 103   }
 104
 105   // Overridden from GpuSurfaceLookup:
 106   gfx::AcceleratedWidget AcquireNativeWidget(int surface_id) override {
 107     JNIEnv* env = base::android::AttachCurrentThread();
 108     gfx::ScopedJavaSurface surface(
 109         content::Java_ChildProcessService_getViewSurface(
 110             env, service_.obj(), surface_id));
 111
 112     if (surface.j_surface().is_null())
 113       return NULL;
 114
 115     // Note: This ensures that any local references used by
 116     // ANativeWindow_fromSurface are released immediately. This is needed as a
 117     // workaround for https://code.google.com/p/android/issues/detail?id=68174
 118     base::android::ScopedJavaLocalFrame scoped_local_reference_frame(env);
 119     ANativeWindow* native_window =
 120         ANativeWindow_fromSurface(env, surface.j_surface().obj());
 121
 122     return native_window;
 123   }
 124
 125  private:
 126   // The instance of org.chromium.content.app.ChildProcessService.
 127   base::android::ScopedJavaGlobalRef<jobject> service_;
 128
 129   DISALLOW_COPY_AND_ASSIGN(SurfaceTextureManagerImpl);
 130 };
 131
 132 // Chrome actually uses the renderer code path for all of its child
 133 // processes such as renderers, plugins, etc.
 134 void InternalInitChildProcess(const std::vector<int>& file_ids,
 135                               const std::vector<int>& file_fds,
 136                               JNIEnv* env,
 137                               jclass clazz,
 138                               jobject context,
 139                               jobject service_in,
 140                               jint cpu_count,
 141                               jlong cpu_features) {
 142   base::android::ScopedJavaLocalRef<jobject> service(env, service_in);
 143
 144   // Set the CPU properties.
 145   android_setCpu(cpu_count, cpu_features);
 146   // Register the file descriptors.
 147   // This includes the IPC channel, the crash dump signals and resource related
 148   // files.
 149   DCHECK(file_fds.size() == file_ids.size());
 150   for (size_t i = 0; i < file_ids.size(); ++i)
 151     base::GlobalDescriptors::GetInstance()->Set(file_ids[i], file_fds[i]);
 152
 153   SurfaceTextureManager::InitInstance(new SurfaceTextureManagerImpl(service));
 154
 155   base::android::MemoryPressureListenerAndroid::RegisterSystemCallback(env);
 156 }
 157
 158 }  // namespace <anonymous>
 159
 160 void InitChildProcess(JNIEnv* env,
 161                       jclass clazz,
 162                       jobject context,
 163                       jobject service,
 164                       jintArray j_file_ids,
 165                       jintArray j_file_fds,
 166                       jint cpu_count,
 167                       jlong cpu_features) {
 168   std::vector<int> file_ids;
 169   std::vector<int> file_fds;
 170   JavaIntArrayToIntVector(env, j_file_ids, &file_ids);
 171   JavaIntArrayToIntVector(env, j_file_fds, &file_fds);
 172
 173   InternalInitChildProcess(
 174       file_ids, file_fds, env, clazz, context, service,
 175       cpu_count, cpu_features);
 176 }
 177
 178 void ExitChildProcess(JNIEnv* env, jclass clazz) {
 179   VLOG(0) << "ChildProcessService: Exiting child process.";
 180   base::android::LibraryLoaderExitHook();
 181   _exit(0);
 182 }
 183
 184 bool RegisterChildProcessService(JNIEnv* env) {
 185   return RegisterNativesImpl(env);
 186 }
 187
 188 void ShutdownMainThread(JNIEnv* env, jobject obj) {
 189   ChildThreadImpl::ShutdownThread();
 190 }
 191
 192 }  // namespace content