mojo/shell/native_application_support.cc

   1 // Copyright 2014 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/shell/native_application_support.h"
   6
   7 #include "base/command_line.h"
   8 #include "base/files/file_path.h"
   9 #include "base/files/file_util.h"
  10 #include "base/logging.h"
  11 #include "mojo/public/platform/native/gles2_impl_chromium_miscellaneous_thunks.h"
  12 #include "mojo/public/platform/native/gles2_impl_chromium_sub_image_thunks.h"
  13 #include "mojo/public/platform/native/gles2_impl_chromium_sync_point_thunks.h"
  14 #include "mojo/public/platform/native/gles2_impl_chromium_texture_mailbox_thunks.h"
  15 #include "mojo/public/platform/native/gles2_impl_occlusion_query_ext_thunks.h"
  16 #include "mojo/public/platform/native/gles2_impl_thunks.h"
  17 #include "mojo/public/platform/native/gles2_thunks.h"
  18 #include "mojo/public/platform/native/system_thunks.h"
  19
  20 namespace mojo {
  21 namespace shell {
  22
  23 namespace {
  24
  25 template <typename Thunks>
  26 bool SetThunks(Thunks (*make_thunks)(),
  27                const char* function_name,
  28                base::NativeLibrary library) {
  29   typedef size_t (*SetThunksFn)(const Thunks* thunks);
  30   SetThunksFn set_thunks = reinterpret_cast<SetThunksFn>(
  31       base::GetFunctionPointerFromNativeLibrary(library, function_name));
  32   if (!set_thunks)
  33     return false;
  34   Thunks thunks = make_thunks();
  35   size_t expected_size = set_thunks(&thunks);
  36   if (expected_size > sizeof(Thunks)) {
  37     LOG(ERROR) << "Invalid app library: expected " << function_name
  38                << " to return thunks of size: " << expected_size;
  39     return false;
  40   }
  41   return true;
  42 }
  43
  44 }  // namespace
  45
  46 base::NativeLibrary LoadNativeApplication(const base::FilePath& app_path,
  47                                           NativeApplicationCleanup cleanup) {
  48   DVLOG(2) << "Loading Mojo app in process from library: " << app_path.value();
  49
  50   base::NativeLibraryLoadError error;
  51   base::NativeLibrary app_library = base::LoadNativeLibrary(app_path, &error);
  52   if (cleanup == NativeApplicationCleanup::DELETE)
  53     DeleteFile(app_path, false);
  54   LOG_IF(ERROR, !app_library)
  55       << "Failed to load app library (error: " << error.ToString() << ")";
  56   return app_library;
  57 }
  58
  59 bool RunNativeApplication(base::NativeLibrary app_library,
  60                           InterfaceRequest<Application> application_request) {
  61   // Tolerate |app_library| being null, to make life easier for callers.
  62   if (!app_library)
  63     return false;
  64
  65   if (!SetThunks(&MojoMakeSystemThunks, "MojoSetSystemThunks", app_library)) {
  66     LOG(ERROR) << "MojoSetSystemThunks not found";
  67     return false;
  68   }
  69
  70   if (SetThunks(&MojoMakeGLES2ControlThunks, "MojoSetGLES2ControlThunks",
  71                 app_library)) {
  72     // If we have the control thunks, we should also have the GLES2
  73     // implementation thunks.
  74     if (!SetThunks(&MojoMakeGLES2ImplThunks, "MojoSetGLES2ImplThunks",
  75                    app_library)) {
  76       LOG(ERROR)
  77           << "MojoSetGLES2ControlThunks found, but not MojoSetGLES2ImplThunks";
  78       return false;
  79     }
  80
  81     // If the application is using GLES2 extension points, register those
  82     // thunks. Applications may use or not use any of these, so don't warn if
  83     // they are missing.
  84     SetThunks(MojoMakeGLES2ImplChromiumMiscellaneousThunks,
  85               "MojoSetGLES2ImplChromiumMiscellaneousThunks", app_library);
  86     SetThunks(MojoMakeGLES2ImplChromiumSubImageThunks,
  87               "MojoSetGLES2ImplChromiumSubImageThunks", app_library);
  88     SetThunks(MojoMakeGLES2ImplChromiumTextureMailboxThunks,
  89               "MojoSetGLES2ImplChromiumTextureMailboxThunks", app_library);
  90     SetThunks(MojoMakeGLES2ImplChromiumSyncPointThunks,
  91               "MojoSetGLES2ImplChromiumSyncPointThunks", app_library);
  92     SetThunks(MojoMakeGLES2ImplOcclusionQueryExtThunks,
  93               "MojoSetGLES2ImplOcclusionQueryExtThunks", app_library);
  94   }
  95   // Unlike system thunks, we don't warn on a lack of GLES2 thunks because
  96   // not everything is a visual app.
  97
  98   // Go shared library support requires us to initialize the runtime before we
  99   // start running any go code. This is a temporary patch.
 100   typedef void (*InitGoRuntimeFn)();
 101   InitGoRuntimeFn init_go_runtime = reinterpret_cast<InitGoRuntimeFn>(
 102       base::GetFunctionPointerFromNativeLibrary(app_library, "InitGoRuntime"));
 103   if (init_go_runtime) {
 104     DVLOG(2) << "InitGoRuntime: Initializing Go Runtime found in app";
 105     init_go_runtime();
 106   }
 107
 108 #if !defined(OS_WIN)
 109   // On Windows, initializing base::CommandLine with null parameters gets the
 110   // process's command line from the OS. Other platforms need it to be passed
 111   // in. This needs to be passed in before the app initializes the command line,
 112   // which is done as soon as it loads.
 113   typedef void (*InitCommandLineArgs)(int, const char* const*);
 114   InitCommandLineArgs init_command_line_args =
 115       reinterpret_cast<InitCommandLineArgs>(
 116           base::GetFunctionPointerFromNativeLibrary(app_library,
 117                                                     "InitCommandLineArgs"));
 118   if (init_command_line_args) {
 119     int argc = 0;
 120     base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess();
 121     const char** argv = new const char* [cmd_line->argv().size()];
 122     for (auto& arg : cmd_line->argv())
 123       argv[argc++] = arg.c_str();
 124     init_command_line_args(argc, argv);
 125   }
 126 #endif
 127
 128   typedef MojoResult (*MojoMainFunction)(MojoHandle);
 129   MojoMainFunction main_function = reinterpret_cast<MojoMainFunction>(
 130       base::GetFunctionPointerFromNativeLibrary(app_library, "MojoMain"));
 131   if (!main_function) {
 132     LOG(ERROR) << "MojoMain not found";
 133     return false;
 134   }
 135   // |MojoMain()| takes ownership of the service handle.
 136   MojoHandle handle = application_request.PassMessagePipe().release().value();
 137   MojoResult result = main_function(handle);
 138   if (result < MOJO_RESULT_OK) {
 139     LOG(ERROR) << "MojoMain returned error (result: " << result << ")";
 140   }
 141   return true;
 142 }
 143
 144 }  // namespace shell
 145 }  // namespace mojo