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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/memory_pressure_listener_android.h"
     12 #include "base/logging.h"
     13 #include "base/posix/global_descriptors.h"
     14 #include "content/child/child_thread.h"
     15 #include "content/common/android/surface_texture_peer.h"
     16 #include "content/common/gpu/gpu_surface_lookup.h"
     17 #include "content/public/app/android_library_loader_hooks.h"
     18 #include "content/public/common/content_descriptors.h"
     19 #include "ipc/ipc_descriptors.h"
     20 #include "jni/ChildProcessService_jni.h"
     21 #include "ui/gl/android/scoped_java_surface.h"
     22 
     23 using base::android::AttachCurrentThread;
     24 using base::android::CheckException;
     25 using base::android::JavaIntArrayToIntVector;
     26 
     27 namespace content {
     28 
     29 namespace {
     30 
     31 class SurfaceTexturePeerChildImpl : public content::SurfaceTexturePeer,
     32                                     public content::GpuSurfaceLookup {
     33  public:
     34   // |service| is the instance of
     35   // org.chromium.content.app.ChildProcessService.
     36   explicit SurfaceTexturePeerChildImpl(
     37       const base::android::ScopedJavaLocalRef<jobject>& service)
     38       : service_(service) {
     39     GpuSurfaceLookup::InitInstance(this);
     40   }
     41 
     42   virtual ~SurfaceTexturePeerChildImpl() {
     43     GpuSurfaceLookup::InitInstance(NULL);
     44   }
     45 
     46   virtual void EstablishSurfaceTexturePeer(
     47       base::ProcessHandle pid,
     48       scoped_refptr<gfx::SurfaceTexture> surface_texture,
     49       int primary_id,
     50       int secondary_id) OVERRIDE {
     51     JNIEnv* env = base::android::AttachCurrentThread();
     52     content::Java_ChildProcessService_establishSurfaceTexturePeer(
     53         env, service_.obj(), pid,
     54         surface_texture->j_surface_texture().obj(), primary_id,
     55         secondary_id);
     56     CheckException(env);
     57   }
     58 
     59   virtual gfx::AcceleratedWidget AcquireNativeWidget(int surface_id) OVERRIDE {
     60     JNIEnv* env = base::android::AttachCurrentThread();
     61     gfx::ScopedJavaSurface surface(
     62         content::Java_ChildProcessService_getViewSurface(
     63         env, service_.obj(), surface_id));
     64 
     65     if (surface.j_surface().is_null())
     66       return NULL;
     67 
     68     ANativeWindow* native_window = ANativeWindow_fromSurface(
     69         env, surface.j_surface().obj());
     70 
     71     return native_window;
     72   }
     73 
     74  private:
     75   // The instance of org.chromium.content.app.ChildProcessService.
     76   base::android::ScopedJavaGlobalRef<jobject> service_;
     77 
     78   DISALLOW_COPY_AND_ASSIGN(SurfaceTexturePeerChildImpl);
     79 };
     80 
     81 // Chrome actually uses the renderer code path for all of its child
     82 // processes such as renderers, plugins, etc.
     83 void InternalInitChildProcess(const std::vector<int>& file_ids,
     84                               const std::vector<int>& file_fds,
     85                               JNIEnv* env,
     86                               jclass clazz,
     87                               jobject context,
     88                               jobject service_in,
     89                               jint cpu_count,
     90                               jlong cpu_features) {
     91   base::android::ScopedJavaLocalRef<jobject> service(env, service_in);
     92 
     93   // Set the CPU properties.
     94   android_setCpu(cpu_count, cpu_features);
     95   // Register the file descriptors.
     96   // This includes the IPC channel, the crash dump signals and resource related
     97   // files.
     98   DCHECK(file_fds.size() == file_ids.size());
     99   for (size_t i = 0; i < file_ids.size(); ++i)
    100     base::GlobalDescriptors::GetInstance()->Set(file_ids[i], file_fds[i]);
    101 
    102   content::SurfaceTexturePeer::InitInstance(
    103       new SurfaceTexturePeerChildImpl(service));
    104 
    105   base::android::MemoryPressureListenerAndroid::RegisterSystemCallback(env);
    106 }
    107 
    108 }  // namespace <anonymous>
    109 
    110 void InitChildProcess(JNIEnv* env,
    111                       jclass clazz,
    112                       jobject context,
    113                       jobject service,
    114                       jintArray j_file_ids,
    115                       jintArray j_file_fds,
    116                       jint cpu_count,
    117                       jlong cpu_features) {
    118   std::vector<int> file_ids;
    119   std::vector<int> file_fds;
    120   JavaIntArrayToIntVector(env, j_file_ids, &file_ids);
    121   JavaIntArrayToIntVector(env, j_file_fds, &file_fds);
    122 
    123   InternalInitChildProcess(
    124       file_ids, file_fds, env, clazz, context, service,
    125       cpu_count, cpu_features);
    126 }
    127 
    128 void ExitChildProcess(JNIEnv* env, jclass clazz) {
    129   VLOG(0) << "ChildProcessService: Exiting child process.";
    130   LibraryLoaderExitHook();
    131   _exit(0);
    132 }
    133 
    134 bool RegisterChildProcessService(JNIEnv* env) {
    135   return RegisterNativesImpl(env);
    136 }
    137 
    138 void ShutdownMainThread(JNIEnv* env, jobject obj) {
    139   ChildThread::ShutdownThread();
    140 }
    141 
    142 }  // namespace content
    143