1*c29d5175Schristos #!/usr/sbin/dtrace -Zs 2*c29d5175Schristos /* 3*c29d5175Schristos * js_flow.d - snoop JavaScript execution showing function flow using DTrace. 4*c29d5175Schristos * Written for the JavaScript DTrace provider. 5*c29d5175Schristos * 6*c29d5175Schristos * $Id: js_flow.d,v 1.1.1.1 2015/09/30 22:01:09 christos Exp $ 7*c29d5175Schristos * 8*c29d5175Schristos * This traces activity from all browsers on the system that are running 9*c29d5175Schristos * with JavaScript provider support. 10*c29d5175Schristos * 11*c29d5175Schristos * USAGE: js_flow.d # hit Ctrl-C to end 12*c29d5175Schristos * 13*c29d5175Schristos * FIELDS: 14*c29d5175Schristos * C CPU-id 15*c29d5175Schristos * TIME(us) Time since boot, us 16*c29d5175Schristos * FILE Filename that this function belongs to 17*c29d5175Schristos * FUNC Function name 18*c29d5175Schristos * 19*c29d5175Schristos * LEGEND: 20*c29d5175Schristos * -> function entry 21*c29d5175Schristos * <- function return 22*c29d5175Schristos * 23*c29d5175Schristos * Filename and function names are printed if available. 24*c29d5175Schristos * 25*c29d5175Schristos * WARNING: Watch the first column carefully, it prints the CPU-id. If it 26*c29d5175Schristos * changes, then it is very likely that the output has been shuffled. 27*c29d5175Schristos * 28*c29d5175Schristos * COPYRIGHT: Copyright (c) 2007 Brendan Gregg. 29*c29d5175Schristos * 30*c29d5175Schristos * CDDL HEADER START 31*c29d5175Schristos * 32*c29d5175Schristos * The contents of this file are subject to the terms of the 33*c29d5175Schristos * Common Development and Distribution License, Version 1.0 only 34*c29d5175Schristos * (the "License"). You may not use this file except in compliance 35*c29d5175Schristos * with the License. 36*c29d5175Schristos * 37*c29d5175Schristos * You can obtain a copy of the license at Docs/cddl1.txt 38*c29d5175Schristos * or http://www.opensolaris.org/os/licensing. 39*c29d5175Schristos * See the License for the specific language governing permissions 40*c29d5175Schristos * and limitations under the License. 41*c29d5175Schristos * 42*c29d5175Schristos * CDDL HEADER END 43*c29d5175Schristos * 44*c29d5175Schristos * 09-Sep-2007 Brendan Gregg Created this. 45*c29d5175Schristos */ 46*c29d5175Schristos 47*c29d5175Schristos #pragma D option quiet 48*c29d5175Schristos #pragma D option switchrate=10 49*c29d5175Schristos 50*c29d5175Schristos self int depth; 51*c29d5175Schristos 52*c29d5175Schristos dtrace:::BEGIN 53*c29d5175Schristos { 54*c29d5175Schristos printf("%3s %-16s %-22s -- %s\n", "C", "TIME(us)", "FILE", "FUNC"); 55*c29d5175Schristos } 56*c29d5175Schristos 57*c29d5175Schristos javascript*:::function-entry 58*c29d5175Schristos { 59*c29d5175Schristos printf("%3d %-16d %-22s %*s-> %s\n", cpu, timestamp / 1000, 60*c29d5175Schristos basename(copyinstr(arg0)), self->depth * 2, "", copyinstr(arg2)); 61*c29d5175Schristos self->depth++; 62*c29d5175Schristos } 63*c29d5175Schristos 64*c29d5175Schristos javascript*:::function-return 65*c29d5175Schristos { 66*c29d5175Schristos self->depth -= self->depth > 0 ? 1 : 0; 67*c29d5175Schristos printf("%3d %-16d %-22s %*s<- %s\n", cpu, timestamp / 1000, 68*c29d5175Schristos basename(copyinstr(arg0)), self->depth * 2, "", copyinstr(arg2)); 69*c29d5175Schristos } 70