mirror of
https://github.com/Stichting-MINIX-Research-Foundation/netbsd.git
synced 2025-09-11 16:15:07 -04:00
70 lines
1.9 KiB
D
Executable File
70 lines
1.9 KiB
D
Executable File
#!/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 22:01:07 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));
|
|
}
|