1 /*
   2  * Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <jni.h>
  27 #include <jvmti.h>
  28 #include <aod.h>
  29 #include <jvmti_aod.h>
  30 
  31 extern "C" {
  32 
  33 /*
  34  * Expected agent work scenario:
  35  *  - receive MonitorContentedEnter event for thread ThreadGeneratingEvents
  36  *  - receive MonitorContentedEntered event for thread ThreadGeneratingEvents and finish work
  37  */
  38 
  39 #define THREAD_GENERATING_EVENTS_NAME "ThreadGeneratingEvents"
  40 
  41 static Options* options = NULL;
  42 static const char* agentName;
  43 
  44 static jvmtiEvent testEvents[] = {JVMTI_EVENT_MONITOR_WAIT, JVMTI_EVENT_MONITOR_WAITED};
  45 static const int testEventsNumber = 2;
  46 
  47 volatile int monitorWaitReceived = 0;
  48 
  49 void JNICALL monitorWaitHandler(jvmtiEnv *jvmti,
  50         JNIEnv* jni,
  51         jthread thread,
  52         jobject object,
  53         jlong timeout) {
  54     char threadName[MAX_STRING_LENGTH];
  55 
  56     if (!nsk_jvmti_aod_getThreadName(jvmti, thread, threadName)) {
  57         nsk_jvmti_aod_disableEventsAndFinish(agentName, testEvents, testEventsNumber, 0, jvmti, jni);
  58         return;
  59     }
  60 
  61     NSK_DISPLAY2("%s: MonitorWait event was received for thread '%s'\n", agentName, threadName);
  62 
  63     if (!strcmp(THREAD_GENERATING_EVENTS_NAME, threadName)) {
  64         monitorWaitReceived = 1;
  65     }
  66 }
  67 
  68 void JNICALL monitorWaitedHandler(jvmtiEnv *jvmti,
  69         JNIEnv* jni,
  70         jthread thread,
  71         jobject object,
  72         jboolean timed_out) {
  73     char threadName[MAX_STRING_LENGTH];
  74 
  75     if (!nsk_jvmti_aod_getThreadName(jvmti, thread, threadName)) {
  76         nsk_jvmti_aod_disableEventsAndFinish(agentName, testEvents, testEventsNumber, 0, jvmti, jni);
  77         return;
  78     }
  79 
  80     NSK_DISPLAY2("%s: MonitorWaited event was received for thread '%s'\n", agentName, threadName);
  81 
  82     if (!strcmp(THREAD_GENERATING_EVENTS_NAME, threadName)) {
  83         int success = 1;
  84 
  85         if (!monitorWaitReceived) {
  86             success = 0;
  87             NSK_COMPLAIN2("%s: MonitorWait event wasn't received for thread '%s'\n", agentName, threadName);
  88         }
  89 
  90         nsk_jvmti_aod_disableEventsAndFinish(agentName, testEvents, testEventsNumber, success, jvmti, jni);
  91     }
  92 }
  93 
  94 #ifdef STATIC_BUILD
  95 JNIEXPORT jint JNI_OnLoad_attach037Agent00(JavaVM *jvm, char *options, void *reserved) {
  96     return JNI_VERSION_1_8;
  97 }
  98 #endif
  99 
 100 JNIEXPORT jint JNICALL
 101 #ifdef STATIC_BUILD
 102 Agent_OnAttach_attach037Agent00(JavaVM *vm, char *optionsString, void *reserved)
 103 #else
 104 Agent_OnAttach(JavaVM *vm, char *optionsString, void *reserved)
 105 #endif
 106 {
 107     jvmtiEventCallbacks eventCallbacks;
 108     jvmtiCapabilities caps;
 109     jvmtiEnv* jvmti;
 110     JNIEnv* jni;
 111 
 112     if (!NSK_VERIFY((options = (Options*) nsk_aod_createOptions(optionsString)) != NULL))
 113         return JNI_ERR;
 114 
 115     agentName = nsk_aod_getOptionValue(options, NSK_AOD_AGENT_NAME_OPTION);
 116 
 117     if ((jni = (JNIEnv*) nsk_aod_createJNIEnv(vm)) == NULL)
 118         return JNI_ERR;
 119 
 120     if (!NSK_VERIFY((jvmti = nsk_jvmti_createJVMTIEnv(vm, reserved)) != NULL))
 121         return JNI_ERR;
 122 
 123     memset(&caps, 0, sizeof(caps));
 124     caps.can_generate_monitor_events = 1;
 125     if (!NSK_JVMTI_VERIFY(jvmti->AddCapabilities(&caps))) {
 126         return JNI_ERR;
 127     }
 128 
 129     memset(&eventCallbacks,0, sizeof(eventCallbacks));
 130     eventCallbacks.MonitorWaited = monitorWaitedHandler;
 131     eventCallbacks.MonitorWait = monitorWaitHandler;
 132     if (!NSK_JVMTI_VERIFY(jvmti->SetEventCallbacks(&eventCallbacks, sizeof(eventCallbacks)))) {
 133         return JNI_ERR;
 134     }
 135 
 136     if (!(nsk_jvmti_aod_enableEvents(jvmti, testEvents, testEventsNumber))) {
 137         return JNI_ERR;
 138     }
 139 
 140     NSK_DISPLAY1("%s: initialization was done\n", agentName);
 141 
 142     if (!NSK_VERIFY(nsk_aod_agentLoaded(jni, agentName)))
 143         return JNI_ERR;
 144 
 145     return JNI_OK;
 146 }
 147 
 148 }