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