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      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
    179