#!/usr/sbin/dtrace -Zs
/*
* tcl_flow.d - snoop Tcl execution showing procedure flow using DTrace.
* Written for the Tcl DTrace provider.
*
* $Id: tcl_flow.d 63 2007-10-04 04:34:38Z brendan $
*
* This traces activity from all Tcl processes on the system with DTrace
* provider support (tcl8.4.16).
*
* USAGE: tcl_flow.d # hit Ctrl-C to end
*
* This watches Tcl method entries and returns, and indents child
* method calls.
*
* FIELDS:
* C CPU-id
* TIME(us) Time since boot, us
* PID Process ID
* CALL Tcl command or procedure name
*
* LEGEND:
* -> procedure entry
* <- procedure return
* > command entry
* < command return
*
* 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 %6s %-16s -- %s\n", "C", "PID", "TIME(us)", "CALL");
}
tcl*:::proc-entry
{
printf("%3d %6d %-16d %*s-> %s\n", cpu, pid, timestamp / 1000,
self->depth * 2, "", copyinstr(arg0));
self->depth++;
}
tcl*:::proc-return
{
self->depth -= self->depth > 0 ? 1 : 0;
printf("%3d %6d %-16d %*s<- %s\n", cpu, pid, timestamp / 1000,
self->depth * 2, "", copyinstr(arg0));
}
tcl*:::cmd-entry
{
printf("%3d %6d %-16d %*s > %s\n", cpu, pid, timestamp / 1000,
self->depth * 2, "", copyinstr(arg0));
self->depth++;
}
tcl*:::cmd-return
{
self->depth -= self->depth > 0 ? 1 : 0;
printf("%3d %6d %-16d %*s < %s\n", cpu, pid, timestamp / 1000,
self->depth * 2, "", copyinstr(arg0));
}