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 "base/time_utils.h" 18 #include "jni.h" 19 #include "runtime.h" 20 #include "thread_list.h" 21 22 namespace art { 23 24 extern "C" JNIEXPORT void JNICALL Java_Main_suspendAndResume(JNIEnv*, jclass) { 25 static constexpr size_t kInitialSleepUS = 100 * 1000; // 100ms. 26 usleep(kInitialSleepUS); // Leave some time for threads to get in here before we start suspending. 27 enum Operation { 28 kOPSuspendAll, 29 kOPDumpStack, 30 kOPSuspendAllDumpStack, 31 // Total number of operations. 32 kOPNumber, 33 }; 34 const uint64_t start_time = NanoTime(); 35 size_t iterations = 0; 36 // Run for a fixed period of 10 seconds. 37 while (NanoTime() - start_time < MsToNs(10 * 1000)) { 38 switch (static_cast<Operation>(iterations % kOPNumber)) { 39 case kOPSuspendAll: { 40 ScopedSuspendAll ssa(__FUNCTION__); 41 usleep(500); 42 break; 43 } 44 case kOPDumpStack: { 45 Runtime::Current()->GetThreadList()->Dump(LOG_STREAM(INFO)); 46 usleep(500); 47 break; 48 } 49 case kOPSuspendAllDumpStack: { 50 // Not yet supported. 51 if ((false)) { 52 ScopedSuspendAll ssa(__FUNCTION__); 53 Runtime::Current()->GetThreadList()->Dump(LOG_STREAM(INFO)); 54 } 55 break; 56 } 57 case kOPNumber: 58 break; 59 } 60 ++iterations; 61 } 62 LOG(INFO) << "Did " << iterations << " iterations"; 63 } 64 65 } // namespace art 66
