#!/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 63 2007-10-04 04:34:38Z brendan $
*
* 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));
}