mojo/runner/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/runner/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/platform_handle/platform_handle_private_thunks.h"
  12 #include "mojo/public/platform/native/gles2_impl_chromium_miscellaneous_thunks.h"
  13 #include "mojo/public/platform/native/gles2_impl_chromium_sub_image_thunks.h"
  14 #include "mojo/public/platform/native/gles2_impl_chromium_sync_point_thunks.h"
  15 #include "mojo/public/platform/native/gles2_impl_chromium_texture_mailbox_thunks.h"
  16 #include "mojo/public/platform/native/gles2_impl_occlusion_query_ext_thunks.h"
  17 #include "mojo/public/platform/native/gles2_impl_thunks.h"
  18 #include "mojo/public/platform/native/gles2_thunks.h"
  19 #include "mojo/public/platform/native/system_thunks.h"
  20
  21 namespace mojo {
  22 namespace runner {
  23
  24 namespace {
  25
  26 template <typename Thunks>
  27 bool SetThunks(Thunks (*make_thunks)(),
  28                const char* function_name,
  29                base::NativeLibrary library) {
  30   typedef size_t (*SetThunksFn)(const Thunks* thunks);
  31   SetThunksFn set_thunks = reinterpret_cast<SetThunksFn>(
  32       base::GetFunctionPointerFromNativeLibrary(library, function_name));
  33   if (!set_thunks)
  34     return false;
  35   Thunks thunks = make_thunks();
  36   size_t expected_size = set_thunks(&thunks);
  37   if (expected_size > sizeof(Thunks)) {
  38     LOG(ERROR) << "Invalid app library: expected " << function_name
  39                << " to return thunks of size: " << expected_size;
  40     return false;
  41   }
  42   return true;
  43 }
  44
  45 }  // namespace
  46
  47 base::NativeLibrary LoadNativeApplication(
  48     const base::FilePath& app_path,
  49     shell::NativeApplicationCleanup cleanup) {
  50   DVLOG(2) << "Loading Mojo app in process from library: " << app_path.value();
  51
  52   base::NativeLibraryLoadError error;
  53   base::NativeLibrary app_library = base::LoadNativeLibrary(app_path, &error);
  54   if (cleanup == shell::NativeApplicationCleanup::DELETE)
  55     DeleteFile(app_path, false);
  56   LOG_IF(ERROR, !app_library)
  57       << "Failed to load app library (error: " << error.ToString() << ")";
  58   return app_library;
  59 }
  60
  61 bool RunNativeApplication(base::NativeLibrary app_library,
  62                           InterfaceRequest<Application> application_request) {
  63   // Tolerate |app_library| being null, to make life easier for callers.
  64   if (!app_library)
  65     return false;
  66
  67   if (!SetThunks(&MojoMakeSystemThunks, "MojoSetSystemThunks", app_library)) {
  68     LOG(ERROR) << "MojoSetSystemThunks not found";
  69     return false;
  70   }
  71
  72   if (SetThunks(&MojoMakeGLES2ControlThunks, "MojoSetGLES2ControlThunks",
  73                 app_library)) {
  74     // If we have the control thunks, we should also have the GLES2
  75     // implementation thunks.
  76     if (!SetThunks(&MojoMakeGLES2ImplThunks, "MojoSetGLES2ImplThunks",
  77                    app_library)) {
  78       LOG(ERROR)
  79           << "MojoSetGLES2ControlThunks found, but not MojoSetGLES2ImplThunks";
  80       return false;
  81     }
  82
  83     // If the application is using GLES2 extension points, register those
  84     // thunks. Applications may use or not use any of these, so don't warn if
  85     // they are missing.
  86     SetThunks(MojoMakeGLES2ImplChromiumMiscellaneousThunks,
  87               "MojoSetGLES2ImplChromiumMiscellaneousThunks", app_library);
  88     SetThunks(MojoMakeGLES2ImplChromiumSubImageThunks,
  89               "MojoSetGLES2ImplChromiumSubImageThunks", app_library);
  90     SetThunks(MojoMakeGLES2ImplChromiumTextureMailboxThunks,
  91               "MojoSetGLES2ImplChromiumTextureMailboxThunks", app_library);
  92     SetThunks(MojoMakeGLES2ImplChromiumSyncPointThunks,
  93               "MojoSetGLES2ImplChromiumSyncPointThunks", app_library);
  94     SetThunks(MojoMakeGLES2ImplOcclusionQueryExtThunks,
  95               "MojoSetGLES2ImplOcclusionQueryExtThunks", app_library);
  96   }
  97   // Unlike system thunks, we don't warn on a lack of GLES2 thunks because
  98   // not everything is a visual app.
  99
 100   // Go shared library support requires us to initialize the runtime before we
 101   // start running any go code. This is a temporary patch.
 102   typedef void (*InitGoRuntimeFn)();
 103   InitGoRuntimeFn init_go_runtime = reinterpret_cast<InitGoRuntimeFn>(
 104       base::GetFunctionPointerFromNativeLibrary(app_library, "InitGoRuntime"));
 105   if (init_go_runtime) {
 106     DVLOG(2) << "InitGoRuntime: Initializing Go Runtime found in app";
 107     init_go_runtime();
 108   }
 109
 110 #if !defined(OS_WIN)
 111   // On Windows, initializing base::CommandLine with null parameters gets the
 112   // process's command line from the OS. Other platforms need it to be passed
 113   // in. This needs to be passed in before the app initializes the command line,
 114   // which is done as soon as it loads.
 115   typedef void (*InitCommandLineArgs)(int, const char* const*);
 116   InitCommandLineArgs init_command_line_args =
 117       reinterpret_cast<InitCommandLineArgs>(
 118           base::GetFunctionPointerFromNativeLibrary(app_library,
 119                                                     "InitCommandLineArgs"));
 120   if (init_command_line_args) {
 121     int argc = 0;
 122     base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess();
 123     const char** argv = new const char* [cmd_line->argv().size()];
 124     for (auto& arg : cmd_line->argv())
 125       argv[argc++] = arg.c_str();
 126     init_command_line_args(argc, argv);
 127   }
 128 #endif
 129
 130   // Apps need not include platform handle thunks.
 131   SetThunks(&MojoMakePlatformHandlePrivateThunks,
 132             "MojoSetPlatformHandlePrivateThunks", app_library);
 133
 134   typedef MojoResult (*MojoMainFunction)(MojoHandle);
 135   MojoMainFunction main_function = reinterpret_cast<MojoMainFunction>(
 136       base::GetFunctionPointerFromNativeLibrary(app_library, "MojoMain"));
 137   if (!main_function) {
 138     LOG(ERROR) << "MojoMain not found";
 139     return false;
 140   }
 141   // |MojoMain()| takes ownership of the service handle.
 142   MojoHandle handle = application_request.PassMessagePipe().release().value();
 143   MojoResult result = main_function(handle);
 144   if (result != MOJO_RESULT_OK) {
 145     LOG(ERROR) << "MojoMain returned error (result: " << result << ")";
 146   }
 147   return true;
 148 }
 149
 150 }  // namespace runner
 151 }  // namespace mojo