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#!/usr/sbin/dtrace -Zs
/*
* rb_flow.d - snoop Ruby execution showing method flow using DTrace.
* Written for the Ruby DTrace provider.
*
* $Id: rb_flow.d 41 2007-09-17 02:20:10Z brendan $
*
* This traces activity from all Ruby programs on the system that are
* running with Ruby provider support.
*
* USAGE: rb_flow.d # hit Ctrl-C to end
*
* FIELDS:
* C CPU-id
* TIME(us) Time since boot, us
* FILE Filename that this method belongs to
* CLASS::METHOD Ruby classname and method
*
* LEGEND:
* -> method entry
* <- method return
*
* Filename and method 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",
"CLASS::METHOD");
}
ruby*:::function-entry
{
printf("%3d %-16d %-22s %*s-> %s::%s\n", cpu, timestamp / 1000,
basename(copyinstr(arg2)), self->depth * 2, "", copyinstr(arg0),
copyinstr(arg1));
self->depth++;
}
ruby*:::function-return
{
self->depth -= self->depth > 0 ? 1 : 0;
printf("%3d %-16d %-22s %*s<- %s::%s\n", cpu, timestamp / 1000,
basename(copyinstr(arg2)), self->depth * 2, "", copyinstr(arg0),
copyinstr(arg1));
}
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