1 #!/usr/sbin/dtrace -Zs 2 /* 3 * js_objnew.d - count JavaScript object creation using DTrace. 4 * Written for the JavaScript DTrace provider. 5 * 6 * $Id: js_objnew.d,v 1.1.1.1 2015/09/30 22:01:09 christos Exp $ 7 * 8 * This traces JavaScript activity from all browsers running on the system 9 * with JavaScript provider support. 10 * 11 * USAGE: js_objnew.d # hit Ctrl-C to end 12 * 13 * FIELDS: 14 * FILE Filename of the JavaScript program 15 * CLASS Class of new object 16 * COUNT Number of object creations during tracing 17 * 18 * Filename and class names are printed if available. 19 * 20 * COPYRIGHT: Copyright (c) 2007 Brendan Gregg. 21 * 22 * CDDL HEADER START 23 * 24 * The contents of this file are subject to the terms of the 25 * Common Development and Distribution License, Version 1.0 only 26 * (the "License"). You may not use this file except in compliance 27 * with the License. 28 * 29 * You can obtain a copy of the license at Docs/cddl1.txt 30 * or http://www.opensolaris.org/os/licensing. 31 * See the License for the specific language governing permissions 32 * and limitations under the License. 33 * 34 * CDDL HEADER END 35 * 36 * 09-Sep-2007 Brendan Gregg Created this. 37 */ 38 39 #pragma D option quiet 40 41 dtrace:::BEGIN 42 { 43 printf("Tracing... Hit Ctrl-C to end.\n"); 44 } 45 46 javascript*:::object-create-done 47 { 48 @objs[basename(copyinstr(arg0)), copyinstr(arg1)] = count(); 49 } 50 51 dtrace:::END 52 { 53 printf(" %-24s %-36s %8s\n", "FILE", "CLASS", "COUNT"); 54 printa(" %-24.24s %-36s %@8d\n", @objs); 55 } 56