1 #!/usr/sbin/dtrace -Zs 2 /* 3 * j_thread.d - snoop Java thread execution using DTrace. 4 Written for the Java hotspot DTrace provider. 5 * 6 * $Id: j_thread.d,v 1.1.1.1 2015/09/30 22:01:09 christos Exp $ 7 * 8 * This traces activity from all Java processes on the system with hotspot 9 * provider support (1.6.0). 10 * 11 * USAGE: j_thread.d # hit Ctrl-C to end 12 * 13 * FIELDS: 14 * TIME Time string 15 * PID Process ID 16 * TID Thread ID 17 * THREAD Thread name 18 * 19 * LEGEND: 20 * => thread start 21 * <= thread end 22 * 23 * COPYRIGHT: Copyright (c) 2007 Brendan Gregg. 24 * 25 * CDDL HEADER START 26 * 27 * The contents of this file are subject to the terms of the 28 * Common Development and Distribution License, Version 1.0 only 29 * (the "License"). You may not use this file except in compliance 30 * with the License. 31 * 32 * You can obtain a copy of the license at Docs/cddl1.txt 33 * or http://www.opensolaris.org/os/licensing. 34 * See the License for the specific language governing permissions 35 * and limitations under the License. 36 * 37 * CDDL HEADER END 38 * 39 * 09-Sep-2007 Brendan Gregg Created this. 40 */ 41 42 #pragma D option quiet 43 #pragma D option switchrate=10 44 45 dtrace:::BEGIN 46 { 47 printf("%-20s %6s/%-5s -- %s\n", "TIME", "PID", "TID", "THREAD"); 48 } 49 50 hotspot*:::thread-start 51 { 52 this->thread = (char *)copyin(arg0, arg1 + 1); 53 this->thread[arg1] = '\0'; 54 printf("%-20Y %6d/%-5d => %s\n", walltimestamp, pid, tid, 55 stringof(this->thread)); 56 } 57 58 hotspot*:::thread-stop 59 { 60 this->thread = (char *)copyin(arg0, arg1 + 1); 61 this->thread[arg1] = '\0'; 62 printf("%-20Y %6d/%-5d <= %s\n", walltimestamp, pid, tid, 63 stringof(this->thread)); 64 } 65