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Issue 2397353002: Purge references of "Mojo Application" from comments & var names. (Closed)
Patch Set: Created 4 years, 2 months ago
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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 "services/shell/runner/host/native_application_support.h"
6
7 #include <stddef.h>
8
9 #include "base/command_line.h"
10 #include "base/files/file_path.h"
11 #include "base/files/file_util.h"
12 #include "base/logging.h"
13 #include "mojo/edk/embedder/entrypoints.h"
14 #include "mojo/public/c/system/thunks.h"
15
16 namespace shell {
17
18 namespace {
19
20 template <typename Thunks>
21 bool SetThunks(Thunks (*make_thunks)(),
22 const char* function_name,
23 base::NativeLibrary library) {
24 typedef size_t (*SetThunksFn)(const Thunks* thunks);
25 SetThunksFn set_thunks = reinterpret_cast<SetThunksFn>(
26 base::GetFunctionPointerFromNativeLibrary(library, function_name));
27 if (!set_thunks)
28 return false;
29 Thunks thunks = make_thunks();
30 size_t expected_size = set_thunks(&thunks);
31 if (expected_size > sizeof(Thunks)) {
32 LOG(ERROR) << "Invalid app library: expected " << function_name
33 << " to return thunks of size: " << expected_size;
34 return false;
35 }
36 return true;
37 }
38
39 } // namespace
40
41 base::NativeLibrary LoadNativeApplication(const base::FilePath& app_path) {
42 DVLOG(2) << "Loading Mojo app in process from library: " << app_path.value();
43
44 base::NativeLibraryLoadError error;
45 base::NativeLibrary app_library = base::LoadNativeLibrary(app_path, &error);
46 LOG_IF(ERROR, !app_library)
47 << "Failed to load app library (path: " << app_path.value()
48 << " reason: " << error.ToString() << ")";
49 return app_library;
50 }
51
52 bool RunNativeApplication(base::NativeLibrary app_library,
53 mojom::ServiceRequest request) {
54 // Tolerate |app_library| being null, to make life easier for callers.
55 if (!app_library)
56 return false;
57
58 // Thunks aren't needed/used in component build, since the thunked methods
59 // just live in their own dynamically loaded library.
60 #if !defined(COMPONENT_BUILD)
61 if (!SetThunks(&mojo::edk::MakeSystemThunks, "MojoSetSystemThunks",
62 app_library)) {
63 LOG(ERROR) << "MojoSetSystemThunks not found";
64 return false;
65 }
66
67 #if !defined(OS_WIN)
68 // On Windows, initializing base::CommandLine with null parameters gets the
69 // process's command line from the OS. Other platforms need it to be passed
70 // in. This needs to be passed in before the app initializes the command line,
71 // which is done as soon as it loads.
72 typedef void (*InitCommandLineArgs)(int, const char* const*);
73 InitCommandLineArgs init_command_line_args =
74 reinterpret_cast<InitCommandLineArgs>(
75 base::GetFunctionPointerFromNativeLibrary(app_library,
76 "InitCommandLineArgs"));
77 if (init_command_line_args) {
78 int argc = 0;
79 base::CommandLine* cmd_line = base::CommandLine::ForCurrentProcess();
80 const char** argv = new const char*[cmd_line->argv().size()];
81 for (auto& arg : cmd_line->argv())
82 argv[argc++] = arg.c_str();
83 init_command_line_args(argc, argv);
84 }
85 #endif
86
87 #endif // !defined(COMPONENT_BUILD)
88
89 typedef MojoResult (*ServiceMainFunction)(MojoHandle);
90 ServiceMainFunction main_function = reinterpret_cast<ServiceMainFunction>(
91 base::GetFunctionPointerFromNativeLibrary(app_library, "ServiceMain"));
92 if (!main_function) {
93 LOG(ERROR) << "ServiceMain not found";
94 return false;
95 }
96 // |ServiceMain()| takes ownership of the service handle.
97 MojoHandle handle = request.PassMessagePipe().release().value();
98 MojoResult result = main_function(handle);
99 if (result != MOJO_RESULT_OK) {
100 LOG(ERROR) << "ServiceMain returned error (result: " << result << ")";
101 }
102 return true;
103 }
104
105 } // namespace shell
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