1 /*
2 * Copyright (c) Huawei Technologies Co., Ltd. 2021. All rights reserved.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 *
15 * Description: ftrace plugin module implements
16 */
17 #include <memory>
18 #include <mutex>
19
20 #include "flow_controller.h"
21 #include "ftrace_namespace.h"
22 #include "logging.h"
23 #include "plugin_module_api.h"
24
25 namespace {
26 constexpr uint32_t MAX_BUFFER_SIZE = 4 * 1024 * 1024;
27
28 std::mutex g_mutex;
29 std::unique_ptr<FTRACE_NS::FlowController> g_mainController;
30 } // namespace
31
TracePluginRegisterWriter(const WriterStruct * writer)32 static int TracePluginRegisterWriter(const WriterStruct* writer)
33 {
34 std::unique_lock<std::mutex> lock(g_mutex);
35 g_mainController = std::make_unique<FTRACE_NS::FlowController>();
36
37 int result = g_mainController->SetWriter(const_cast<WriterStructPtr>(writer));
38 PROFILER_LOG_INFO(LOG_CORE, "%s: %d", __func__, __LINE__);
39 return result;
40 }
41
TracePluginStartSession(const uint8_t configData[],const uint32_t configSize)42 static int TracePluginStartSession(const uint8_t configData[], const uint32_t configSize)
43 {
44 std::unique_lock<std::mutex> lock(g_mutex);
45 CHECK_NOTNULL(g_mainController, -1, "%s: no FlowController created!", __func__);
46
47 PROFILER_LOG_INFO(LOG_CORE, "%s: %d", __func__, __LINE__);
48 int retval = g_mainController->LoadConfig(configData, configSize);
49 CHECK_TRUE(retval == 0, retval, "LoadConfig failed!");
50
51 PROFILER_LOG_INFO(LOG_CORE, "%s: %d", __func__, __LINE__);
52 int result = g_mainController->StartCapture();
53 PROFILER_LOG_INFO(LOG_CORE, "%s: %d", __func__, __LINE__);
54 return result;
55 }
56
TracePluginReportBasicData()57 static int TracePluginReportBasicData()
58 {
59 std::unique_lock<std::mutex> lock(g_mutex);
60 CHECK_NOTNULL(g_mainController, -1, "%s: no FlowController created!", __func__);
61
62 PROFILER_LOG_INFO(LOG_CORE, "%s: %d", __func__, __LINE__);
63 g_mainController->SetReportBasicData(true);
64 PROFILER_LOG_INFO(LOG_CORE, "%s: %d", __func__, __LINE__);
65 return 0;
66 }
67
TracePluginStopSession()68 static int TracePluginStopSession()
69 {
70 std::unique_lock<std::mutex> lock(g_mutex);
71 CHECK_NOTNULL(g_mainController, -1, "%s: no FlowController created!", __func__);
72
73 PROFILER_LOG_INFO(LOG_CORE, "%s: %d", __func__, __LINE__);
74 int result = g_mainController->StopCapture();
75 PROFILER_LOG_INFO(LOG_CORE, "%s: %d", __func__, __LINE__);
76
77 g_mainController.reset();
78 return result;
79 }
80
TraceReportState()81 static bool TraceReportState()
82 {
83 return g_mainController->IsDataReady();
84 }
85
86 static PluginModuleCallbacks moduleCallbacks = {
87 .onPluginSessionStart = TracePluginStartSession,
88 .onPluginReportResult = 0,
89 .onPluginSessionStop = TracePluginStopSession,
90 .onRegisterWriterStruct = TracePluginRegisterWriter,
91 .onReportBasicDataCallback = TracePluginReportBasicData, // report ftrace_plugin basic data
92 .onReportStateCallback = TraceReportState,
93 };
94
95 EXPORT_API PluginModuleStruct g_pluginModule = {
96 .callbacks = &moduleCallbacks,
97 .name = "ftrace-plugin",
98 .version = "1.02",
99 .resultBufferSizeHint = MAX_BUFFER_SIZE,
100 };
101