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      1 /*
      2  * Copyright (C) 2017 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 <atomic>
     18 #include <signal.h>
     19 #include <sys/types.h>
     20 
     21 #include "android-base/logging.h"
     22 #include "android-base/macros.h"
     23 #include "jni.h"
     24 #include "jvmti.h"
     25 
     26 // Test infrastructure
     27 #include "jvmti_helper.h"
     28 #include "test_env.h"
     29 
     30 namespace art {
     31 namespace Test933MiscEvents {
     32 
     33 static std::atomic<bool> saw_dump_request(false);
     34 
     35 static void DumpRequestCallback(jvmtiEnv* jenv ATTRIBUTE_UNUSED) {
     36   printf("Received dump request.\n");
     37   saw_dump_request.store(true, std::memory_order::memory_order_relaxed);
     38 }
     39 
     40 extern "C" JNIEXPORT void JNICALL Java_art_Test933_testSigQuit(
     41     JNIEnv* env, jclass Main_klass ATTRIBUTE_UNUSED) {
     42   jvmtiEventCallbacks callbacks;
     43   memset(&callbacks, 0, sizeof(jvmtiEventCallbacks));
     44   callbacks.DataDumpRequest = DumpRequestCallback;
     45   jvmtiError ret = jvmti_env->SetEventCallbacks(&callbacks, sizeof(callbacks));
     46   if (JvmtiErrorToException(env, jvmti_env, ret)) {
     47     return;
     48   }
     49 
     50   ret = jvmti_env->SetEventNotificationMode(JVMTI_ENABLE,
     51                                             JVMTI_EVENT_DATA_DUMP_REQUEST,
     52                                             nullptr);
     53   if (JvmtiErrorToException(env, jvmti_env, ret)) {
     54     return;
     55   }
     56 
     57   // Send sigquit to self.
     58   kill(getpid(), SIGQUIT);
     59 
     60   // Busy-wait for request.
     61   for (;;) {
     62     sleep(1);
     63     if (saw_dump_request.load(std::memory_order::memory_order_relaxed)) {
     64       break;
     65     }
     66   }
     67 
     68   ret = jvmti_env->SetEventNotificationMode(JVMTI_DISABLE, JVMTI_EVENT_DATA_DUMP_REQUEST, nullptr);
     69   JvmtiErrorToException(env, jvmti_env, ret);
     70 }
     71 
     72 }  // namespace Test933MiscEvents
     73 }  // namespace art
     74