text: /*
   * Copyright (C) 2017 The Android Open Source Project
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  #include <signal.h>
  #include <sys/types.h>
  
  #include <atomic>
  
  #include "android-base/logging.h"
  #include "android-base/macros.h"
  #include "jni.h"
  #include "jvmti.h"
  
  // Test infrastructure
  #include "jvmti_helper.h"
  #include "test_env.h"
  
  namespace art {
  namespace Test933MiscEvents {
  
  static std::atomic<bool> saw_dump_request(false);
  
  static void DumpRequestCallback(jvmtiEnv* jenv ATTRIBUTE_UNUSED) {
    printf("Received dump request.\n");
    saw_dump_request.store(true, std::memory_order::memory_order_relaxed);
  }
  
  extern "C" JNIEXPORT void JNICALL Java_art_Test933_testSigQuit(
      JNIEnv* env, jclass Main_klass ATTRIBUTE_UNUSED) {
    jvmtiEventCallbacks callbacks;
    memset(&callbacks, 0, sizeof(jvmtiEventCallbacks));
    callbacks.DataDumpRequest = DumpRequestCallback;
    jvmtiError ret = jvmti_env->SetEventCallbacks(&callbacks, sizeof(callbacks));
    if (JvmtiErrorToException(env, jvmti_env, ret)) {
      return;
    }
  
    ret = jvmti_env->SetEventNotificationMode(JVMTI_ENABLE,
                                              JVMTI_EVENT_DATA_DUMP_REQUEST,
                                              nullptr);
    if (JvmtiErrorToException(env, jvmti_env, ret)) {
      return;
    }
  
    // Send sigquit to self.
    kill(getpid(), SIGQUIT);
  
    // Busy-wait for request.
    for (;;) {
      sleep(1);
      if (saw_dump_request.load(std::memory_order::memory_order_relaxed)) {
        break;
      }
    }
  
    ret = jvmti_env->SetEventNotificationMode(JVMTI_DISABLE, JVMTI_EVENT_DATA_DUMP_REQUEST, nullptr);
    JvmtiErrorToException(env, jvmti_env, ret);
  }
  
  }  // namespace Test933MiscEvents
  }  // namespace art
  