From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on dcvr.yhbt.net X-Spam-Level: X-Spam-Status: No, score=-1.9 required=3.0 tests=AWL,BAYES_00, DKIM_ADSP_CUSTOM_MED,FORGED_GMAIL_RCVD,FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, RCVD_IN_BL_SPAMCOP_NET,RCVD_IN_DNSWL_MED,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY shortcircuit=no autolearn=no autolearn_force=no version=3.4.2 Received: from neon.ruby-lang.org (neon.ruby-lang.org [221.186.184.75]) by dcvr.yhbt.net (Postfix) with ESMTP id 1B0CC1F9FD for ; Mon, 1 Mar 2021 22:32:42 +0000 (UTC) Received: from neon.ruby-lang.org (localhost [IPv6:::1]) by neon.ruby-lang.org (Postfix) with ESMTP id A4CE81209ED; Tue, 2 Mar 2021 07:31:31 +0900 (JST) Received: from xtrwkhkc.outbound-mail.sendgrid.net (xtrwkhkc.outbound-mail.sendgrid.net [167.89.16.28]) by neon.ruby-lang.org (Postfix) with ESMTPS id B27F2120932 for ; Tue, 2 Mar 2021 07:31:29 +0900 (JST) Received: by filterdrecv-p3iad2-fdf5ff85d-zvdwv with SMTP id filterdrecv-p3iad2-fdf5ff85d-zvdwv-20-603D6B77-8 2021-03-01 22:32:23.048403719 +0000 UTC m=+1727097.891359650 Received: from herokuapp.com (unknown) by ismtpd0122p1mdw1.sendgrid.net (SG) with ESMTP id bvMlJlsoQs-SJKLEHu1TLw for ; Mon, 01 Mar 2021 22:32:22.948 +0000 (UTC) Date: Mon, 01 Mar 2021 22:32:23 +0000 (UTC) From: xtkoba+ruby@gmail.com Message-ID: References: Mime-Version: 1.0 X-Redmine-MailingListIntegration-Message-Ids: 78679 X-Redmine-Project: ruby-master X-Redmine-Issue-Tracker: Bug X-Redmine-Issue-Id: 17540 X-Redmine-Issue-Author: xtkoba X-Redmine-Sender: xtkoba X-Mailer: Redmine X-Redmine-Host: bugs.ruby-lang.org X-Redmine-Site: Ruby Issue Tracking System X-Auto-Response-Suppress: All Auto-Submitted: auto-generated X-SG-EID: =?us-ascii?Q?75w3+RXRrinEP3ykAS=2F1WzD2vTMrJdTeEiaFbXc9IwUakZdEcLFhk+yM4NW1Jv?= =?us-ascii?Q?1Zh8dEGcSEinhluTYS+Y2+WTQxA8CVQjBEM2GCs?= =?us-ascii?Q?YDe2PKGeAU3qS26w138+PVS12taJlrGGWsqtld5?= =?us-ascii?Q?9M93nVH7mqU+JM00Wor9zkf1nmrtDxDBWbY8rtr?= =?us-ascii?Q?I9VIzPOuKiUisLO043gww8vp0W3ivYHCNpYf2IO?= =?us-ascii?Q?aivejy=2Fwbyvaw3xuk=3D?= To: ruby-core@ruby-lang.org X-Entity-ID: b/2+PoftWZ6GuOu3b0IycA== X-ML-Name: ruby-core X-Mail-Count: 102680 Subject: [ruby-core:102680] [Ruby master Bug#17540] A segfault due to Clang/LLVM optimization on 32-bit ARM Linux X-BeenThere: ruby-core@ruby-lang.org X-Mailman-Version: 2.1.15 Precedence: list Reply-To: Ruby developers List-Id: Ruby developers List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ruby-core-bounces@ruby-lang.org Sender: "ruby-core" Issue #17540 has been updated by xtkoba (Tee KOBAYASHI). A ticket in LLVM Bugzilla: https://bugs.llvm.org/show_bug.cgi?id=49384 ---------------------------------------- Bug #17540: A segfault due to Clang/LLVM optimization on 32-bit ARM Linux https://bugs.ruby-lang.org/issues/17540#change-90674 * Author: xtkoba (Tee KOBAYASHI) * Status: Open * Priority: Normal * ruby -v: ruby 3.0.0p0 (2020-12-25 revision 95aff21468) [armv7a-linux-eabi] * Backport: 2.5: UNKNOWN, 2.6: UNKNOWN, 2.7: UNKNOWN, 3.0: UNKNOWN ---------------------------------------- When built with `optflags=-O3` (which is the default), `ruby -e "pp Thread.main"` causes a segfault, which seems to be worked around by the following change: ``` --- a/include/ruby/internal/fl_type.h +++ b/include/ruby/internal/fl_type.h @@ -231,7 +231,7 @@ RBIMPL_ATTR_PURE_UNLESS_DEBUG() RBIMPL_ATTR_ARTIFICIAL() static inline VALUE -RB_FL_TEST_RAW(VALUE obj, VALUE flags) +RB_FL_TEST_RAW(volatile VALUE obj, VALUE flags) { RBIMPL_ASSERT_OR_ASSUME(RB_FL_ABLE(obj)); return RBASIC(obj)->flags & flags; ``` There might be a bug in the optimizer of Clang/LLVM (version 11.0.1). -- https://bugs.ruby-lang.org/