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 ThreadStart event for thread ThreadGeneratingEvents
  36  *  - receive ThreadEnd 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_THREAD_START, JVMTI_EVENT_THREAD_END};
  45 static const int testEventsNumber = 2;
  46 
  47 static volatile int threadStartReceived = 0;
  48 
  49 void JNICALL threadStartHandler(jvmtiEnv *jvmti,
  50         JNIEnv* jni,
  51         jthread thread) {
  52     char threadName[MAX_STRING_LENGTH];
  53 
  54     if (!nsk_jvmti_aod_getThreadName(jvmti, thread, threadName)) {
  55         nsk_jvmti_aod_disableEventsAndFinish(agentName, testEvents, testEventsNumber, 0, jvmti, jni);
  56         return;
  57     }
  58 
  59     NSK_DISPLAY2("%s: ThreadStart event was received for thread '%s'\n", agentName, threadName);
  60 
  61     if (!strcmp(THREAD_GENERATING_EVENTS_NAME, threadName)) {
  62         threadStartReceived = 1;
  63     }
  64 }
  65 
  66 
  67 void JNICALL threadEndHandler(jvmtiEnv *jvmti,
  68         JNIEnv* jni,
  69         jthread thread) {
  70     char threadName[MAX_STRING_LENGTH];
  71 
  72     if (!nsk_jvmti_aod_getThreadName(jvmti, thread, threadName)) {
  73         nsk_jvmti_aod_disableEventsAndFinish(agentName, testEvents, testEventsNumber, 0, jvmti, jni);
  74         return;
  75     }
  76 
  77     NSK_DISPLAY2("%s: ThreadEnd event was received for thread '%s'\n", agentName, threadName);
  78 
  79     if (!strcmp(THREAD_GENERATING_EVENTS_NAME, threadName)) {
  80         int success = 1;
  81 
  82         if (!threadStartReceived) {
  83             NSK_COMPLAIN1("%s: ThreadStart event wasn't received\n", agentName);
  84             success = 0;
  85         }
  86 
  87         nsk_jvmti_aod_disableEventsAndFinish(agentName, testEvents, testEventsNumber, success, jvmti, jni);
  88     }
  89 }
  90 
  91 #ifdef STATIC_BUILD
  92 JNIEXPORT jint JNI_OnLoad_attach038Agent00(JavaVM *jvm, char *options, void *reserved) {
  93     return JNI_VERSION_1_8;
  94 }
  95 #endif
  96 
  97 JNIEXPORT jint JNICALL
  98 #ifdef STATIC_BUILD
  99 Agent_OnAttach_attach038Agent00(JavaVM *vm, char *optionsString, void *reserved)
 100 #else
 101 Agent_OnAttach(JavaVM *vm, char *optionsString, void *reserved)
 102 #endif
 103 {
 104     jvmtiEventCallbacks eventCallbacks;
 105     jvmtiEnv* jvmti;
 106     JNIEnv* jni;
 107 
 108     if (!NSK_VERIFY((options = (Options*) nsk_aod_createOptions(optionsString)) != NULL))
 109         return JNI_ERR;
 110 
 111     agentName = nsk_aod_getOptionValue(options, NSK_AOD_AGENT_NAME_OPTION);
 112 
 113     if ((jni = (JNIEnv*) nsk_aod_createJNIEnv(vm)) == NULL)
 114         return JNI_ERR;
 115 
 116     if (!NSK_VERIFY((jvmti = nsk_jvmti_createJVMTIEnv(vm, reserved)) != NULL))
 117         return JNI_ERR;
 118 
 119     memset(&eventCallbacks,0, sizeof(eventCallbacks));
 120     eventCallbacks.ThreadEnd = threadEndHandler;
 121     eventCallbacks.ThreadStart = threadStartHandler;
 122     if (!NSK_JVMTI_VERIFY(jvmti->SetEventCallbacks(&eventCallbacks, sizeof(eventCallbacks)))) {
 123         return JNI_ERR;
 124     }
 125 
 126     if (!(nsk_jvmti_aod_enableEvents(jvmti, testEvents, testEventsNumber))) {
 127         return JNI_ERR;
 128     }
 129 
 130     NSK_DISPLAY1("%s: initialization was done\n", agentName);
 131 
 132     if (!NSK_VERIFY(nsk_aod_agentLoaded(jni, agentName)))
 133         return JNI_ERR;
 134 
 135     return JNI_OK;
 136 }
 137 
 138 }