1 /* 2 * Copyright (c) 2004, 2011, Oracle and/or its affiliates. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * - Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 11 * - Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * - Neither the name of Oracle nor the names of its 16 * contributors may be used to endorse or promote products derived 17 * from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 20 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 26 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* 33 * This source code is provided to illustrate the usage of a given feature 34 * or technique and has been deliberately simplified. Additional steps 35 * required for a production-quality application, such as security checks, 36 * input validation and proper error handling, might not be present in 37 * this sample code. 38 */ 39 40 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <string.h> 44 45 #include "jni.h" 46 #include "jvmti.h" 47 48 #include "agent_util.h" 49 50 #include "Thread.hpp" 51 52 /* Implementation of the Thread class */ 53 54 Thread::Thread(jvmtiEnv *jvmti, JNIEnv *env, jthread thread) 55 { 56 jvmtiError err; 57 jvmtiThreadInfo info; 58 59 /* Get and save the name of the thread */ 60 info.name = NULL; 61 (void)strcpy(name, "Unknown"); 62 err = jvmti->GetThreadInfo(thread, &info); 63 check_jvmti_error(jvmti, err, "get thread info"); 64 if ( info.name != NULL ) { 65 (void)strncpy(name, info.name, (int)sizeof(name)-1); 66 name[(int)sizeof(name)-1] = 0; 67 deallocate(jvmti, info.name); 68 } 69 70 /* Clear thread counters */ 71 contends = 0; 72 waits = 0; 73 timeouts = 0; 74 } 75 76 Thread::~Thread() 77 { 78 /* Send out summary message */ 79 stdout_message("Thread %s summary: %d waits plus %d contended\n", 80 name, waits, contends); 81 } 82 83 void Thread::monitor_contended_enter(jvmtiEnv* jvmti, JNIEnv *env, 84 jthread thread, jobject object) 85 { 86 contends++; 87 } 88 89 void Thread::monitor_wait(jvmtiEnv* jvmti, JNIEnv *env, 90 jthread thread, jobject object, jlong timeout) 91 { 92 waits++; 93 } 94 95 void Thread::monitor_waited(jvmtiEnv* jvmti, JNIEnv *env, 96 jthread thread, jobject object, jboolean timed_out) 97 { 98 if ( timed_out ) { 99 timeouts++; 100 } 101 }