1 /* 2 * Copyright (C) 2018 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 <jni.h> 18 #include <nativehelper/scoped_local_ref.h> 19 #include <pthread.h> 20 21 #include <android-base/logging.h> 22 23 namespace art { 24 25 static JavaVM* vm = nullptr; 26 27 static void* Runner(void* arg) { 28 CHECK(vm != nullptr); 29 30 jobject thread_group = reinterpret_cast<jobject>(arg); 31 JNIEnv* env = nullptr; 32 JavaVMAttachArgs args = { JNI_VERSION_1_6, __FUNCTION__, thread_group }; 33 int attach_result = vm->AttachCurrentThread(&env, &args); 34 CHECK_EQ(attach_result, 0); 35 36 { 37 ScopedLocalRef<jclass> klass(env, env->FindClass("Main")); 38 CHECK(klass != nullptr); 39 40 jmethodID id = env->GetStaticMethodID(klass.get(), "runFromNative", "()V"); 41 CHECK(id != nullptr); 42 43 env->CallStaticVoidMethod(klass.get(), id); 44 } 45 46 int detach_result = vm->DetachCurrentThread(); 47 CHECK_EQ(detach_result, 0); 48 return nullptr; 49 } 50 51 extern "C" JNIEXPORT void JNICALL Java_Main_testNativeThread( 52 JNIEnv* env, jclass, jobject thread_group) { 53 CHECK_EQ(env->GetJavaVM(&vm), 0); 54 jobject global_thread_group = env->NewGlobalRef(thread_group); 55 56 pthread_t pthread; 57 int pthread_create_result = pthread_create(&pthread, nullptr, Runner, global_thread_group); 58 CHECK_EQ(pthread_create_result, 0); 59 int pthread_join_result = pthread_join(pthread, nullptr); 60 CHECK_EQ(pthread_join_result, 0); 61 62 env->DeleteGlobalRef(global_thread_group); 63 } 64 65 } // namespace art 66
