Alex Light | 1d8a974 | 2017-08-17 11:12:06 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #include "1919-vminit-thread-start-timing/vminit.h" |
| 18 | |
Igor Murashkin | 5573c37 | 2017-11-16 13:34:30 -0800 | [diff] [blame^] | 19 | #include <mutex> |
| 20 | #include <thread> |
Alex Light | 1d8a974 | 2017-08-17 11:12:06 -0700 | [diff] [blame] | 21 | #include <vector> |
| 22 | |
| 23 | #include <jni.h> |
| 24 | #include <stdio.h> |
| 25 | #include <string.h> |
| 26 | #include "android-base/macros.h" |
| 27 | #include "jvmti.h" |
| 28 | |
| 29 | // Test infrastructure |
| 30 | #include "scoped_local_ref.h" |
| 31 | #include "jvmti_helper.h" |
| 32 | #include "jni_helper.h" |
| 33 | #include "test_env.h" |
| 34 | |
| 35 | namespace art { |
| 36 | namespace Test1919VMInitThreadStart { |
| 37 | |
| 38 | struct EventData { |
| 39 | std::string event; |
| 40 | jobject data; |
| 41 | }; |
| 42 | |
| 43 | struct EventList { |
| 44 | jrawMonitorID events_mutex; |
| 45 | std::vector<EventData> events; |
| 46 | }; |
| 47 | |
| 48 | |
| 49 | static void EnableEvent(jvmtiEnv* env, jvmtiEvent evt) { |
| 50 | jvmtiError error = env->SetEventNotificationMode(JVMTI_ENABLE, evt, nullptr); |
| 51 | if (error != JVMTI_ERROR_NONE) { |
| 52 | printf("Failed to enable event"); |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | static void JNICALL ThreadStartCallback(jvmtiEnv *jvmti, JNIEnv* env, jthread thread) { |
| 57 | EventList* list = nullptr; |
| 58 | CheckJvmtiError(jvmti, jvmti->GetEnvironmentLocalStorage(reinterpret_cast<void**>(&list))); |
| 59 | CheckJvmtiError(jvmti, jvmti->RawMonitorEnter(list->events_mutex)); |
| 60 | list->events.push_back({ "ThreadStart", env->NewGlobalRef(thread) }); |
| 61 | CheckJvmtiError(jvmti, jvmti->RawMonitorExit(list->events_mutex)); |
| 62 | } |
| 63 | |
| 64 | static void JNICALL Test1919AgentThread(jvmtiEnv* jvmti, |
| 65 | JNIEnv* env, |
| 66 | void* arg ATTRIBUTE_UNUSED) { |
| 67 | EventList* list = nullptr; |
| 68 | CheckJvmtiError(jvmti, jvmti->GetEnvironmentLocalStorage(reinterpret_cast<void**>(&list))); |
| 69 | CheckJvmtiError(jvmti, jvmti->RawMonitorEnter(list->events_mutex)); |
| 70 | jthread cur; |
| 71 | CheckJvmtiError(jvmti, jvmti->GetCurrentThread(&cur)); |
| 72 | list->events.push_back({ "Test1919AgentThread", env->NewGlobalRef(cur) }); |
| 73 | env->DeleteLocalRef(cur); |
| 74 | // Wake up VMInit |
| 75 | CheckJvmtiError(jvmti, jvmti->RawMonitorNotify(list->events_mutex)); |
| 76 | CheckJvmtiError(jvmti, jvmti->RawMonitorExit(list->events_mutex)); |
| 77 | } |
| 78 | |
| 79 | static void CreateAgentThread(jvmtiEnv* jvmti, JNIEnv* env) { |
| 80 | // Create a Thread object. |
| 81 | ScopedLocalRef<jobject> thread_name(env, env->NewStringUTF("JVMTI_THREAD-Test1919")); |
| 82 | CHECK(thread_name.get() != nullptr); |
| 83 | |
| 84 | ScopedLocalRef<jclass> thread_klass(env, env->FindClass("java/lang/Thread")); |
| 85 | CHECK(thread_klass.get() != nullptr); |
| 86 | |
| 87 | ScopedLocalRef<jobject> thread(env, env->AllocObject(thread_klass.get())); |
| 88 | CHECK(thread.get() != nullptr); |
| 89 | |
| 90 | jmethodID initID = env->GetMethodID(thread_klass.get(), "<init>", "(Ljava/lang/String;)V"); |
| 91 | CHECK(initID != nullptr); |
| 92 | |
| 93 | env->CallNonvirtualVoidMethod(thread.get(), thread_klass.get(), initID, thread_name.get()); |
| 94 | CHECK(!env->ExceptionCheck()); |
| 95 | |
| 96 | // Run agent thread. |
| 97 | CheckJvmtiError(jvmti, jvmti->RunAgentThread(thread.get(), |
| 98 | Test1919AgentThread, |
| 99 | nullptr, |
| 100 | JVMTI_THREAD_NORM_PRIORITY)); |
| 101 | } |
| 102 | |
| 103 | static void JNICALL VMInitCallback(jvmtiEnv *jvmti, JNIEnv* env, jthread thread) { |
| 104 | EventList* list = nullptr; |
| 105 | CheckJvmtiError(jvmti, jvmti->GetEnvironmentLocalStorage(reinterpret_cast<void**>(&list))); |
| 106 | CheckJvmtiError(jvmti, jvmti->RawMonitorEnter(list->events_mutex)); |
| 107 | list->events.push_back({ "VMInit", env->NewGlobalRef(thread) }); |
| 108 | // Create a new thread. |
| 109 | CreateAgentThread(jvmti, env); |
| 110 | // Wait for new thread to run. |
| 111 | CheckJvmtiError(jvmti, jvmti->RawMonitorWait(list->events_mutex, 0)); |
| 112 | CheckJvmtiError(jvmti, jvmti->RawMonitorExit(list->events_mutex)); |
| 113 | } |
| 114 | |
| 115 | static void InstallVMEvents(jvmtiEnv* env) { |
| 116 | jvmtiEventCallbacks callbacks; |
| 117 | memset(&callbacks, 0, sizeof(jvmtiEventCallbacks)); |
| 118 | callbacks.VMInit = VMInitCallback; |
| 119 | callbacks.ThreadStart = ThreadStartCallback; |
| 120 | jvmtiError ret = env->SetEventCallbacks(&callbacks, sizeof(callbacks)); |
| 121 | if (ret != JVMTI_ERROR_NONE) { |
| 122 | printf("Failed to install callbacks"); |
| 123 | } |
| 124 | |
| 125 | EnableEvent(env, JVMTI_EVENT_VM_INIT); |
| 126 | EnableEvent(env, JVMTI_EVENT_THREAD_START); |
| 127 | } |
| 128 | |
| 129 | static void InstallEventList(jvmtiEnv* env) { |
| 130 | EventList* list = nullptr; |
| 131 | CheckJvmtiError(env, env->Allocate(sizeof(EventList), reinterpret_cast<unsigned char**>(&list))); |
| 132 | memset(list, 0, sizeof(EventList)); |
| 133 | CheckJvmtiError(env, env->CreateRawMonitor("Test1919 Monitor", &list->events_mutex)); |
| 134 | CheckJvmtiError(env, env->SetEnvironmentLocalStorage(list)); |
| 135 | } |
| 136 | |
| 137 | jint OnLoad(JavaVM* vm, |
| 138 | char* options ATTRIBUTE_UNUSED, |
| 139 | void* reserved ATTRIBUTE_UNUSED) { |
| 140 | if (vm->GetEnv(reinterpret_cast<void**>(&jvmti_env), JVMTI_VERSION_1_0) != 0) { |
| 141 | printf("Unable to get jvmti env!\n"); |
| 142 | return 1; |
| 143 | } |
| 144 | InstallVMEvents(jvmti_env); |
| 145 | InstallEventList(jvmti_env); |
| 146 | return 0; |
| 147 | } |
| 148 | |
| 149 | extern "C" JNIEXPORT jobjectArray JNICALL Java_art_Test1919_getEventNames(JNIEnv* env, jclass) { |
| 150 | EventList* list = nullptr; |
| 151 | if (JvmtiErrorToException(env, |
| 152 | jvmti_env, |
| 153 | jvmti_env->GetEnvironmentLocalStorage( |
| 154 | reinterpret_cast<void**>(&list)))) { |
| 155 | return nullptr; |
| 156 | } |
| 157 | if (JvmtiErrorToException(env, jvmti_env, jvmti_env->RawMonitorEnter(list->events_mutex))) { |
| 158 | return nullptr; |
| 159 | } |
| 160 | jobjectArray ret = CreateObjectArray(env, list->events.size(), "java/lang/String", |
| 161 | [&](jint i) { |
| 162 | return env->NewStringUTF(list->events[i].event.c_str()); |
| 163 | }); |
| 164 | if (JvmtiErrorToException(env, jvmti_env, jvmti_env->RawMonitorExit(list->events_mutex))) { |
| 165 | return nullptr; |
| 166 | } |
| 167 | return ret; |
| 168 | } |
| 169 | |
| 170 | extern "C" JNIEXPORT jobjectArray JNICALL Java_art_Test1919_getEventThreads(JNIEnv* env, jclass) { |
| 171 | EventList* list = nullptr; |
| 172 | if (JvmtiErrorToException(env, |
| 173 | jvmti_env, |
| 174 | jvmti_env->GetEnvironmentLocalStorage( |
| 175 | reinterpret_cast<void**>(&list)))) { |
| 176 | return nullptr; |
| 177 | } |
| 178 | if (JvmtiErrorToException(env, jvmti_env, jvmti_env->RawMonitorEnter(list->events_mutex))) { |
| 179 | return nullptr; |
| 180 | } |
| 181 | jobjectArray ret = CreateObjectArray(env, list->events.size(), "java/lang/Thread", |
| 182 | [&](jint i) { |
| 183 | return env->NewLocalRef(list->events[i].data); |
| 184 | }); |
| 185 | if (JvmtiErrorToException(env, jvmti_env, jvmti_env->RawMonitorExit(list->events_mutex))) { |
| 186 | return nullptr; |
| 187 | } |
| 188 | return ret; |
| 189 | } |
| 190 | |
| 191 | } // namespace Test1919VMInitThreadStart |
| 192 | } // namespace art |