From 91e0823b0448b7d0b2a817ccfeb96eec85fe26cf Mon Sep 17 00:00:00 2001 From: Sahil Dua Date: Sun, 17 Jul 2016 02:05:07 +0200 Subject: [PATCH] Replace DTrace sample with a premissive license --- samples/DTrace/javascript-trace.d | 73 ------------ samples/DTrace/trace_futexes.d | 184 ++++++++++++++++++++++++++++++ 2 files changed, 184 insertions(+), 73 deletions(-) delete mode 100644 samples/DTrace/javascript-trace.d create mode 100644 samples/DTrace/trace_futexes.d diff --git a/samples/DTrace/javascript-trace.d b/samples/DTrace/javascript-trace.d deleted file mode 100644 index 0acbaa97..00000000 --- a/samples/DTrace/javascript-trace.d +++ /dev/null @@ -1,73 +0,0 @@ -/* -*- Mode: dtrace-script; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ -/* ***** BEGIN LICENSE BLOCK ***** - * Version: MPL 1.1/GPL 2.0/LGPL 2.1 - * - * The contents of this file are subject to the Mozilla Public License Version - * 1.1 (the "License"); you may not use this file except in compliance with - * the License. You may obtain a copy of the License at - * http://www.mozilla.org/MPL/ - * - * Software distributed under the License is distributed on an "AS IS" basis, - * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License - * for the specific language governing rights and limitations under the - * License. - * - * Copyright (C) 2007 Sun Microsystems, Inc. All Rights Reserved. - * - * Alternatively, the contents of this file may be used under the terms of - * either the GNU General Public License Version 2 or later (the "GPL"), or - * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), - * in which case the provisions of the GPL or the LGPL are applicable instead - * of those above. If you wish to allow use of your version of this file only - * under the terms of either the GPL or the LGPL, and not to allow others to - * use your version of this file under the terms of the MPL, indicate your - * decision by deleting the provisions above and replace them with the notice - * and other provisions required by the GPL or the LGPL. If you do not delete - * the provisions above, a recipient may use your version of this file under - * the terms of any one of the MPL, the GPL or the LGPL. - * - * ***** END LICENSE BLOCK ***** */ - -/* - * javascript provider probes - * - * function-entry (filename, classname, funcname) - * function-info (filename, classname, funcname, lineno, - * runfilename, runlineno) - * function-args (filename, classname, funcname, argc, argv, argv0, - * argv1, argv2, argv3, argv4) - * function-rval (filename, classname, funcname, lineno, rval, rval0) - * function-return (filename, classname, funcname) - * object-create-start (filename, classname) - * object-create (filename, classname, *object, rlineno) - * object-create-done (filename, classname) - * object-finalize (NULL, classname, *object) - * execute-start (filename, lineno) - * execute-done (filename, lineno) - */ - -provider javascript { - probe function__entry(char *, char *, char *); - probe function__info(char *, char *, char *, int, char *, int); - probe function__args(char *, char *, char *, int, void *, void *, void *, - void *, void *, void *); - probe function__rval(char *, char *, char *, int, void *, void *); - probe function__return(char *, char *, char *); - probe object__create__start(char *, char *); - probe object__create__done(char *, char *); - /* XXX must use unsigned longs here instead of uintptr_t for OS X - (Apple radar: 5194316 & 5565198) */ - probe object__create(char *, char *, unsigned long, int); - probe object__finalize(char *, char *, unsigned long); - probe execute__start(char *, int); - probe execute__done(char *, int); -}; - -/* -#pragma D attributes Unstable/Unstable/Common provider mozilla provider -#pragma D attributes Private/Private/Unknown provider mozilla module -#pragma D attributes Private/Private/Unknown provider mozilla function -#pragma D attributes Unstable/Unstable/Common provider mozilla name -#pragma D attributes Unstable/Unstable/Common provider mozilla args -*/ - diff --git a/samples/DTrace/trace_futexes.d b/samples/DTrace/trace_futexes.d new file mode 100644 index 00000000..c9cbc99f --- /dev/null +++ b/samples/DTrace/trace_futexes.d @@ -0,0 +1,184 @@ +#!/usr/sbin/dtrace -qs + +// Source: https://github.com/bycn82/freebsd/blob/12a4a4a008eac3cfa71e496b33eaeaf426c374c1/sys/compat/linux/trace_futexes.d + +/*- + * Copyright (c) 2011-2012 Alexander Leidinger + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer + * in this position and unchanged. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * $FreeBSD$ + */ + +/** + * Trace futex operations: + * - internal locks + * - size of the futex list + * - report error conditions (emulation errors, kernel errors, + * programming errors) + * - execution time (wallclock) of futex related functions + */ + +#pragma D option specsize=32m + +/* Error conditions */ +linuxulator*:futex:futex_get:error, +linuxulator*:futex:futex_sleep:requeue_error, +linuxulator*:futex:futex_sleep:sleep_error, +linuxulator*:futex:futex_wait:copyin_error, +linuxulator*:futex:futex_wait:itimerfix_error, +linuxulator*:futex:futex_wait:sleep_error, +linuxulator*:futex:futex_atomic_op:missing_access_check, +linuxulator*:futex:futex_atomic_op:unimplemented_op, +linuxulator*:futex:futex_atomic_op:unimplemented_cmp, +linuxulator*:futex:linux_sys_futex:unimplemented_clockswitch, +linuxulator*:futex:linux_sys_futex:copyin_error, +linuxulator*:futex:linux_sys_futex:unhandled_efault, +linuxulator*:futex:linux_sys_futex:unimplemented_lock_pi, +linuxulator*:futex:linux_sys_futex:unimplemented_unlock_pi, +linuxulator*:futex:linux_sys_futex:unimplemented_trylock_pi, +linuxulator*:futex:linux_sys_futex:unimplemented_wait_requeue_pi, +linuxulator*:futex:linux_sys_futex:unimplemented_cmp_requeue_pi, +linuxulator*:futex:linux_sys_futex:unknown_operation, +linuxulator*:futex:linux_get_robust_list:copyout_error, +linuxulator*:futex:handle_futex_death:copyin_error, +linuxulator*:futex:fetch_robust_entry:copyin_error, +linuxulator*:futex:release_futexes:copyin_error +{ + printf("ERROR: %s in %s:%s:%s\n", probename, probeprov, probemod, + probefunc); + stack(); + ustack(); +} + +linuxulator*:futex:linux_sys_futex:invalid_cmp_requeue_use, +linuxulator*:futex:linux_sys_futex:deprecated_requeue, +linuxulator*:futex:linux_set_robust_list:size_error +{ + printf("WARNING: %s:%s:%s:%s in application %s, maybe an application error?\n", + probename, probeprov, probemod, probefunc, execname); + stack(); + ustack(); +} + + +/* Per futex checks/statistics */ + +linuxulator*:futex:futex:create +{ + ++futex_count; + @max_futexes = max(futex_count); +} + +linuxulator*:futex:futex:destroy +/futex_count == 0/ +{ + printf("ERROR: Request to destroy a futex which was not created,\n"); + printf(" or this script was started after some futexes where\n"); + printf(" created. Stack trace:\n"); + stack(); + ustack(); +} + +linuxulator*:futex:futex:destroy +{ + --futex_count; +} + + +/* Internal locks */ + +linuxulator*:locks:futex_mtx:locked +{ + ++check[probefunc, arg0]; + @stats[probefunc] = count(); + + ts[probefunc] = timestamp; + spec[probefunc] = speculation(); + printf("Stacktrace of last lock operation of the %s:\n", probefunc); + stack(); +} + +linuxulator*:locks:futex_mtx:unlock +/check[probefunc, arg0] == 0/ +{ + printf("ERROR: unlock attempt of unlocked %s (%p),", probefunc, arg0); + printf(" missing SDT probe in kernel, or dtrace program started"); + printf(" while the %s was already held (race condition).", probefunc); + printf(" Stack trace follows:"); + stack(); +} + +linuxulator*:locks:futex_mtx:unlock +{ + discard(spec[probefunc]); + spec[probefunc] = 0; + --check[probefunc, arg0]; +} + +/* Timeout handling for internal locks */ + +tick-10s +/spec["futex_mtx"] != 0 && timestamp - ts["futex_mtx"] >= 9999999000/ +{ + commit(spec["futex_mtx"]); + spec["futex_mtx"] = 0; +} + + +/* Timing statistings */ + +linuxulator*:futex::entry +{ + self->time[probefunc] = timestamp; + @calls[probeprov, execname, probefunc] = count(); +} + +linuxulator*:futex::return +/self->time[probefunc] != 0/ +{ + this->timediff = self->time[probefunc] - timestamp; + + @timestats[probeprov, execname, probefunc] = quantize(this->timediff); + @longest[probeprov, probefunc] = max(this->timediff); + + self->time[probefunc] = 0; +} + + +/* Statistics */ + +END +{ + printf("Number of locks per type:"); + printa(@stats); + printf("Number of maximum number of futexes in the futex list:"); + printa(@max_futexes); + printf("Number of futexes still existing: %d", futex_count); + printf("Number of calls per provider/application/kernel function:"); + printa(@calls); + printf("Wallclock-timing statistics per provider/application/kernel function (in ns):"); + printa(@timestats); + printf("Longest running (wallclock!) functions per provider (in ns):"); + printa(@longest); +} \ No newline at end of file