#!/usr/sbin/dtrace -Zs /* * js_flow.d - snoop JavaScript execution showing function flow using DTrace. * Written for the JavaScript DTrace provider. * * $Id: js_flow.d,v 1.1.1.1 2015/09/30 22:01:09 christos Exp $ * * This traces activity from all browsers on the system that are running * with JavaScript provider support. * * USAGE: js_flow.d # hit Ctrl-C to end * * FIELDS: * C CPU-id * TIME(us) Time since boot, us * FILE Filename that this function belongs to * FUNC Function name * * LEGEND: * -> function entry * <- function return * * Filename and function names are printed if available. * * WARNING: Watch the first column carefully, it prints the CPU-id. If it * changes, then it is very likely that the output has been shuffled. * * COPYRIGHT: Copyright (c) 2007 Brendan Gregg. * * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License, Version 1.0 only * (the "License"). You may not use this file except in compliance * with the License. * * You can obtain a copy of the license at Docs/cddl1.txt * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * CDDL HEADER END * * 09-Sep-2007 Brendan Gregg Created this. */ #pragma D option quiet #pragma D option switchrate=10 self int depth; dtrace:::BEGIN { printf("%3s %-16s %-22s -- %s\n", "C", "TIME(us)", "FILE", "FUNC"); } javascript*:::function-entry { printf("%3d %-16d %-22s %*s-> %s\n", cpu, timestamp / 1000, basename(copyinstr(arg0)), self->depth * 2, "", copyinstr(arg2)); self->depth++; } javascript*:::function-return { self->depth -= self->depth > 0 ? 1 : 0; printf("%3d %-16d %-22s %*s<- %s\n", cpu, timestamp / 1000, basename(copyinstr(arg0)), self->depth * 2, "", copyinstr(arg2)); }