| /* |
| * Copyright (c) 2003, 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 <stdio.h> |
| #include <string.h> |
| #include "jni_tools.h" |
| #include "agent_common.h" |
| #include "jvmti_tools.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| /* ========================================================================== */ |
| |
| /* scaffold objects */ |
| static JNIEnv* jni = NULL; |
| static jvmtiEnv *jvmti = NULL; |
| static jlong timeout = 0; |
| |
| /* test objects */ |
| static jthread thread = NULL; |
| static jobject object = NULL; |
| static volatile int eventsCount = 0; |
| |
| /* ========================================================================== */ |
| |
| /* Check GetPotentialCapabilities function |
| */ |
| void JNICALL |
| MonitorContendedEntered(jvmtiEnv *jvmti, JNIEnv* jni, jthread thr, jobject obj) { |
| |
| NSK_DISPLAY2("MonitorContendedEntered event:\n\tthread: %p, object: %p\n", |
| thr, obj); |
| |
| if (!NSK_VERIFY(thread != NULL)) { |
| nsk_jvmti_setFailStatus(); |
| return; |
| } |
| |
| /* check if event is for tested thread and for tested object */ |
| if (NSK_CPP_STUB3(IsSameObject, jni, thread, thr) && |
| NSK_CPP_STUB3(IsSameObject, jni, object, obj)) |
| eventsCount++; |
| } |
| |
| void JNICALL |
| MonitorContendedEnter(jvmtiEnv *jvmti, JNIEnv* jni, jthread thr, jobject obj) { |
| |
| NSK_DISPLAY2("MonitorContendedEnter event:\n\tthread: %p, object: %p\n", |
| thr, obj); |
| |
| if (!NSK_VERIFY(thread != NULL)) { |
| nsk_jvmti_setFailStatus(); |
| return; |
| } |
| |
| /* check if event is for tested thread and for tested object */ |
| if (NSK_CPP_STUB3(IsSameObject, jni, thread, thr) && |
| NSK_CPP_STUB3(IsSameObject, jni, object, obj)) |
| eventsCount++; |
| } |
| |
| |
| /* ========================================================================== */ |
| |
| static int prepare() { |
| const char* THREAD_NAME = "Debuggee Thread"; |
| jclass klass = NULL; |
| jfieldID field = NULL; |
| jvmtiThreadInfo info; |
| jthread *threads = NULL; |
| jint threads_count = 0; |
| int i; |
| |
| NSK_DISPLAY0("Prepare: find tested thread\n"); |
| |
| /* get all live threads */ |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB3(GetAllThreads, jvmti, &threads_count, &threads))) |
| return NSK_FALSE; |
| |
| if (!NSK_VERIFY(threads_count > 0 && threads != NULL)) |
| return NSK_FALSE; |
| |
| /* find tested thread */ |
| for (i = 0; i < threads_count; i++) { |
| if (!NSK_VERIFY(threads[i] != NULL)) |
| return NSK_FALSE; |
| |
| /* get thread information */ |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB3(GetThreadInfo, jvmti, threads[i], &info))) |
| return NSK_FALSE; |
| |
| NSK_DISPLAY3(" thread #%d (%s): %p\n", i, info.name, threads[i]); |
| |
| /* find by name */ |
| if (info.name != NULL && (strcmp(info.name, THREAD_NAME) == 0)) { |
| thread = threads[i]; |
| } |
| } |
| |
| /* deallocate threads list */ |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB2(Deallocate, jvmti, (unsigned char*)threads))) |
| return NSK_FALSE; |
| |
| if (thread == NULL) { |
| NSK_COMPLAIN0("Debuggee thread not found"); |
| return NSK_FALSE; |
| } |
| |
| /* make thread accessable for a long time */ |
| if (!NSK_JNI_VERIFY(jni, (thread = |
| NSK_CPP_STUB2(NewGlobalRef, jni, thread)) != NULL)) |
| return NSK_FALSE; |
| |
| /* get tested thread class */ |
| if (!NSK_JNI_VERIFY(jni, (klass = |
| NSK_CPP_STUB2(GetObjectClass, jni, thread)) != NULL)) |
| return NSK_FALSE; |
| |
| /* get tested thread field 'endingMonitor' */ |
| if (!NSK_JNI_VERIFY(jni, (field = |
| NSK_CPP_STUB4(GetFieldID, jni, klass, |
| "endingMonitor", "Ljava/lang/Object;")) != NULL)) |
| return NSK_FALSE; |
| |
| /* get 'endingMonitor' object */ |
| if (!NSK_JNI_VERIFY(jni, (object = |
| NSK_CPP_STUB3(GetObjectField, jni, thread, field)) != NULL)) |
| return NSK_FALSE; |
| |
| /* make object accessable for a long time */ |
| if (!NSK_JNI_VERIFY(jni, (object = |
| NSK_CPP_STUB2(NewGlobalRef, jni, object)) != NULL)) |
| return NSK_FALSE; |
| |
| /* enable MonitorContendedEntered event */ |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB4(SetEventNotificationMode, jvmti, JVMTI_ENABLE, |
| JVMTI_EVENT_MONITOR_CONTENDED_ENTERED, NULL))) |
| return NSK_FALSE; |
| |
| /* enable MonitorContendedEnter event */ |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB4(SetEventNotificationMode, jvmti, JVMTI_ENABLE, |
| JVMTI_EVENT_MONITOR_CONTENDED_ENTER, NULL))) |
| return NSK_FALSE; |
| |
| return NSK_TRUE; |
| } |
| |
| static int clean() { |
| |
| /* disable MonitorContendedEntered event */ |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB4(SetEventNotificationMode, jvmti, JVMTI_DISABLE, |
| JVMTI_EVENT_MONITOR_CONTENDED_ENTERED, NULL))) |
| nsk_jvmti_setFailStatus(); |
| |
| return NSK_TRUE; |
| } |
| |
| /* ========================================================================== */ |
| |
| /* agent algorithm |
| */ |
| static void JNICALL |
| agentProc(jvmtiEnv* jvmti, JNIEnv* agentJNI, void* arg) { |
| jni = agentJNI; |
| |
| /* wait for initial sync */ |
| if (!nsk_jvmti_waitForSync(timeout)) |
| return; |
| |
| if (!prepare()) { |
| nsk_jvmti_setFailStatus(); |
| return; |
| } |
| |
| /* clear events count */ |
| eventsCount = 0; |
| |
| /* resume debugee to catch MonitorContendedEntered event */ |
| if (!(NSK_VERIFY(nsk_jvmti_resumeSync()) && |
| NSK_VERIFY(nsk_jvmti_waitForSync(timeout)))) |
| return; |
| |
| NSK_DISPLAY1("Number of MonitorContendedEntered events: %d\n", eventsCount); |
| |
| if (eventsCount == 0) { |
| NSK_COMPLAIN0("No any MonitorContendedEntered event\n"); |
| nsk_jvmti_setFailStatus(); |
| } |
| |
| if (!clean()) { |
| nsk_jvmti_setFailStatus(); |
| return; |
| } |
| |
| /* resume debugee after last sync */ |
| if (!nsk_jvmti_resumeSync()) |
| return; |
| } |
| |
| /* ========================================================================== */ |
| |
| /* agent library initialization |
| */ |
| #ifdef STATIC_BUILD |
| JNIEXPORT jint JNICALL Agent_OnLoad_mcontentered001(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNICALL Agent_OnAttach_mcontentered001(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNI_OnLoad_mcontentered001(JavaVM *jvm, char *options, void *reserved) { |
| return JNI_VERSION_1_8; |
| } |
| #endif |
| jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) { |
| jvmtiCapabilities caps; |
| jvmtiEventCallbacks callbacks; |
| |
| /* init framework and parse options */ |
| if (!NSK_VERIFY(nsk_jvmti_parseOptions(options))) |
| return JNI_ERR; |
| |
| timeout = nsk_jvmti_getWaitTime() * 60000; |
| NSK_DISPLAY1("Timeout: %d msc\n", (int)timeout); |
| |
| /* create JVMTI environment */ |
| if (!NSK_VERIFY((jvmti = |
| nsk_jvmti_createJVMTIEnv(jvm, reserved)) != NULL)) |
| return JNI_ERR; |
| |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB2(GetPotentialCapabilities, jvmti,&caps))) |
| return JNI_ERR; |
| |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(AddCapabilities, jvmti, &caps))) |
| return JNI_ERR; |
| |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(GetCapabilities, jvmti, &caps))) |
| return JNI_ERR; |
| |
| if (!NSK_VERIFY(caps.can_generate_monitor_events)) |
| return JNI_ERR; |
| |
| memset(&callbacks, 0, sizeof(callbacks)); |
| callbacks.MonitorContendedEntered = &MonitorContendedEntered; |
| callbacks.MonitorContendedEnter = &MonitorContendedEnter; |
| |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB3(SetEventCallbacks, jvmti, |
| &callbacks, sizeof(callbacks)))) |
| return JNI_ERR; |
| |
| /* register agent proc and arg */ |
| if (!NSK_VERIFY(nsk_jvmti_setAgentProc(agentProc, NULL))) |
| return JNI_ERR; |
| |
| return JNI_OK; |
| } |
| |
| JNIEXPORT jint JNICALL Java_nsk_jvmti_MonitorContendedEntered_mcontentered001_getEventCount |
| (JNIEnv *env, jobject obj) |
| { |
| return eventsCount; |
| } |
| |
| /* ========================================================================== */ |
| |
| #ifdef __cplusplus |
| } |
| #endif |