| /* |
| * Copyright (c) 2004, 2018, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| #include <string.h> |
| #include "jvmti.h" |
| #include "agent_common.h" |
| #include "jni_tools.h" |
| #include "jvmti_tools.h" |
| |
| extern "C" { |
| |
| static JNIEnv *jni = NULL; |
| static jvmtiEnv* jvmti = NULL; |
| static jlong timeout = 0; |
| static jboolean eventEnabled = JNI_FALSE; |
| static volatile jboolean eventReceived1 = JNI_FALSE, eventReceived2 = JNI_FALSE; |
| static jclass checkedClass; |
| static jrawMonitorID eventMon; |
| |
| |
| /* ============================================================================= */ |
| |
| static void JNICALL |
| ClassUnload(jvmtiEnv* jvmti_env, JNIEnv *jni_env, jthread thread, jclass klass, ...) { |
| /* |
| * With the CMS GC the event can be posted on |
| * a ConcurrentGC thread that is not a JavaThread. |
| * In this case the thread argument can be NULL, so that, |
| * we should not expect the thread argument to be non-NULL. |
| */ |
| if (klass == NULL) { |
| nsk_jvmti_setFailStatus(); |
| NSK_COMPLAIN0("ClassUnload: 'klass' input parameter is NULL.\n"); |
| |
| } |
| NSK_DISPLAY0("Received ClassUnload event.\n"); |
| if (eventEnabled == JNI_TRUE) { |
| eventReceived1 = JNI_TRUE; |
| } else { |
| eventReceived2 = JNI_TRUE; |
| } |
| |
| /* Notify main agent thread */ |
| if (!NSK_JVMTI_VERIFY(jvmti->RawMonitorEnter(eventMon))) { |
| nsk_jvmti_setFailStatus(); |
| } |
| if (!NSK_JVMTI_VERIFY(jvmti->RawMonitorNotify(eventMon))) { |
| nsk_jvmti_setFailStatus(); |
| } |
| if (!NSK_JVMTI_VERIFY(jvmti->RawMonitorExit(eventMon))) { |
| nsk_jvmti_setFailStatus(); |
| } |
| } |
| |
| jboolean isClassUnloadingEnabled() { |
| jint extCount, i; |
| jvmtiExtensionFunctionInfo* extList; |
| jboolean found = JNI_FALSE; |
| jboolean enabled = JNI_FALSE; |
| jvmtiError err; |
| |
| NSK_DISPLAY0("Get extension functions list\n"); |
| |
| if (!NSK_JVMTI_VERIFY(jvmti->GetExtensionFunctions(&extCount, &extList))) { |
| nsk_jvmti_setFailStatus(); |
| return JNI_FALSE; |
| } |
| |
| for (i = 0; i < extCount; i++) { |
| if (strcmp(extList[i].id, (char*)"com.sun.hotspot.functions.IsClassUnloadingEnabled") == 0) { |
| found = JNI_TRUE; |
| |
| err = (*extList[i].func)(jvmti, &enabled); |
| if (err != JVMTI_ERROR_NONE) { |
| NSK_COMPLAIN1("Error during invocation of IsClassUnloadingEnabled function: %d\n", err); |
| nsk_jvmti_setFailStatus(); |
| return JNI_FALSE; |
| } |
| } |
| } |
| if (found == JNI_FALSE) { |
| NSK_COMPLAIN0("IsClassUnloadingEnabled was not found among extension functions.\n"); |
| nsk_jvmti_setFailStatus(); |
| return JNI_FALSE; |
| } |
| |
| return enabled; |
| } |
| |
| jboolean enableClassUnloadEvent (jboolean enable) { |
| jint extCount, i; |
| jvmtiExtensionEventInfo* extList; |
| jboolean found = JNI_FALSE; |
| |
| NSK_DISPLAY0("Get extension events list\n"); |
| if (!NSK_JVMTI_VERIFY(jvmti->GetExtensionEvents(&extCount, &extList))) { |
| nsk_jvmti_setFailStatus(); |
| return JNI_FALSE; |
| } |
| |
| for (i = 0; i < extCount; i++) { |
| if (strcmp(extList[i].id, (char*)"com.sun.hotspot.events.ClassUnload") == 0) { |
| found = JNI_TRUE; |
| |
| if (!NSK_JVMTI_VERIFY( |
| jvmti->SetExtensionEventCallback(extList[i].extension_event_index, |
| enable ? (jvmtiExtensionEvent)ClassUnload : NULL))) { |
| nsk_jvmti_setFailStatus(); |
| return JNI_FALSE; |
| } |
| eventEnabled = enable; |
| if (enable == JNI_TRUE) { |
| NSK_DISPLAY1("%s callback enabled\n", extList[i].id); |
| } else { |
| NSK_DISPLAY1("%s callback disabled\n", extList[i].id); |
| } |
| } |
| } |
| if (found == JNI_FALSE) { |
| NSK_COMPLAIN0("ClassUnload event was not found among extension events.\n"); |
| nsk_jvmti_setFailStatus(); |
| return JNI_FALSE; |
| } |
| return JNI_TRUE; |
| } |
| |
| |
| /* ============================================================================= */ |
| |
| /** Agent algorithm. */ |
| static void JNICALL |
| agentProc(jvmtiEnv* jvmti, JNIEnv* jni, void* arg) { |
| do { |
| if (isClassUnloadingEnabled() == JNI_FALSE) { |
| NSK_COMPLAIN0("ClassUnloadingEnabled returned false.\n"); |
| nsk_jvmti_setFailStatus(); |
| } |
| |
| NSK_DISPLAY0("Wait for loading of ex03t001a class.\n"); |
| if (!NSK_VERIFY(nsk_jvmti_waitForSync(timeout))) |
| return; |
| |
| if (enableClassUnloadEvent(JNI_TRUE) == JNI_FALSE) { |
| NSK_COMPLAIN0("Cannot set up ClassUnload event callback.\n"); |
| break; |
| } |
| |
| NSK_DISPLAY0("Let debugee to unload ex03t001a class.\n"); |
| if (!NSK_VERIFY(nsk_jvmti_resumeSync())) |
| break; |
| |
| /* Wait for notifying from event's thread */ |
| if (!NSK_JVMTI_VERIFY(jvmti->RawMonitorEnter(eventMon))) { |
| nsk_jvmti_setFailStatus(); |
| } |
| if (!NSK_JVMTI_VERIFY(jvmti->RawMonitorWait(eventMon, timeout))) { |
| nsk_jvmti_setFailStatus(); |
| } |
| if (!NSK_JVMTI_VERIFY(jvmti->RawMonitorExit(eventMon))) { |
| nsk_jvmti_setFailStatus(); |
| } |
| |
| NSK_DISPLAY0("Wait for loading of ex03t001b class.\n"); |
| if (!NSK_VERIFY(nsk_jvmti_waitForSync(timeout))) |
| return; |
| |
| if (enableClassUnloadEvent(JNI_FALSE) == JNI_FALSE) { |
| NSK_COMPLAIN0("Cannot set off ClassUnload event callback.\n"); |
| break; |
| } |
| |
| NSK_DISPLAY0("Let debugee to unload ex03t001b class.\n"); |
| if (!NSK_VERIFY(nsk_jvmti_resumeSync())) |
| return; |
| |
| /* Wait during 10 secs for notifying from event's thread */ |
| if (!NSK_JVMTI_VERIFY(jvmti->RawMonitorEnter(eventMon))) { |
| nsk_jvmti_setFailStatus(); |
| } |
| if (!NSK_JVMTI_VERIFY(jvmti->RawMonitorWait(eventMon, 10000))) { |
| nsk_jvmti_setFailStatus(); |
| } |
| if (!NSK_JVMTI_VERIFY(jvmti->RawMonitorExit(eventMon))) { |
| nsk_jvmti_setFailStatus(); |
| } |
| |
| if (eventReceived1 == JNI_FALSE) { |
| nsk_jvmti_setFailStatus(); |
| NSK_COMPLAIN0("Expected ClassUnload event was not received.\n"); |
| } |
| |
| if (eventReceived2 == JNI_TRUE) { |
| nsk_jvmti_setFailStatus(); |
| NSK_COMPLAIN0("Received unexpected ClassUnload event.\n"); |
| } |
| |
| if (!NSK_VERIFY(nsk_jvmti_waitForSync(timeout))) |
| return; |
| |
| } while (0); |
| |
| NSK_TRACE(jvmti->DestroyRawMonitor(eventMon)); |
| |
| NSK_DISPLAY0("Let debugee to finish\n"); |
| if (!NSK_VERIFY(nsk_jvmti_resumeSync())) |
| return; |
| } |
| |
| /* ============================================================================= */ |
| |
| /** Agent library initialization. */ |
| #ifdef STATIC_BUILD |
| JNIEXPORT jint JNICALL Agent_OnLoad_ex03t001(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNICALL Agent_OnAttach_ex03t001(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNI_OnLoad_ex03t001(JavaVM *jvm, char *options, void *reserved) { |
| return JNI_VERSION_1_8; |
| } |
| #endif |
| jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) { |
| |
| if (!NSK_VERIFY(nsk_jvmti_parseOptions(options))) |
| return JNI_ERR; |
| |
| timeout = nsk_jvmti_getWaitTime() * 60 * 1000; |
| |
| if (!NSK_VERIFY((jvmti = |
| nsk_jvmti_createJVMTIEnv(jvm, reserved)) != NULL)) |
| return JNI_ERR; |
| |
| if (!NSK_JVMTI_VERIFY(jvmti->CreateRawMonitor("eventMon", &eventMon))) { |
| return JNI_ERR; |
| } |
| |
| if (!NSK_VERIFY(nsk_jvmti_setAgentProc(agentProc, NULL))) |
| return JNI_ERR; |
| |
| return JNI_OK; |
| } |
| |
| /* ============================================================================= */ |
| |
| } |
