#!/usr/sbin/dtrace -Zs
/*
* rb_malloc.d - Ruby operations and libc malloc statistics.
* Written for the Ruby DTrace provider.
*
* $Id: rb_malloc.d 20 2007-09-12 09:28:22Z brendan $
*
* WARNING: This script is not 100% accurate; This prints libc malloc() byte
* distributions by "recent" Ruby operation, which we hope will be usually
* relevant. This is an experimental script that may be improved over time.
*
* USAGE: rb_malloc.d { -p PID | -c cmd } # hit Ctrl-C to end
*
* FIELDS:
* 1 Filename of the Ruby program
* 2 Type of operation (method/objnew/startup)
* 3 Name of operation
*
* Filename and method names are printed if available.
*
* 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
self string filename;
dtrace:::BEGIN
{
printf("Tracing... Hit Ctrl-C to end.\n");
}
ruby$target:::function-entry
{
self->file = basename(copyinstr(arg2));
self->type = "method";
self->name = strjoin(strjoin(copyinstr(arg0), "::"), copyinstr(arg1));
}
ruby$target:::object-create-start
{
self->file = basename(copyinstr(arg1));
self->type = "objnew";
self->name = copyinstr(arg0);
}
pid$target:libc:malloc:entry
/self->file != NULL/
{
@mallocs[self->file, self->type, self->name] = quantize(arg0);
}
pid$target:libc:malloc:entry
/self->file == NULL/
{
@mallocs["ruby", "startup", "-"] = quantize(arg0);
}
dtrace:::END
{
printf("Ruby malloc byte distributions by recent Ruby operation,\n");
printa(" %s, %s, %s %@d\n", @mallocs);
}