#!/usr/sbin/dtrace -Zs /* * rb_malloc.d - Ruby operations and libc malloc statistics. * Written for the Ruby DTrace provider. * * $Id: rb_malloc.d,v 1.1.1.1 2015/09/30 22:01:09 christos Exp $ * * 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); }