From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: Nikolay Kudryavtsev Newsgroups: gmane.emacs.devel Subject: Re: Unexec dumping results in "Segmentation fault" on Windows Msys2 Date: Wed, 21 Apr 2021 19:33:11 +0300 Message-ID: <8ed0330c-482f-3f82-8b37-308328a314b5@gmail.com> References: <83im52ed8b.fsf@gnu.org> <989be2e0-a090-309b-58cb-8064c6bd5aee@gmail.com> <83y2dycmgr.fsf@gnu.org> <835z0oyrct.fsf@gnu.org> <83eefby1hy.fsf@gnu.org> <64f14133-a647-7406-4908-671258038ae2@gmail.com> <834kg7xqrm.fsf@gnu.org> <79b4e022-5d46-ae76-2192-9e8594c43d8d@gmail.com> <83o8eevwym.fsf@gnu.org> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="19585"; mail-complaints-to="usenet@ciao.gmane.io" User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.9.1 Cc: emacs-devel@gnu.org To: Eli Zaretskii Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Wed Apr 21 18:36:47 2021 Return-path: Envelope-to: ged-emacs-devel@m.gmane-mx.org Original-Received: from lists.gnu.org ([209.51.188.17]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1lZFqJ-00050H-NW for ged-emacs-devel@m.gmane-mx.org; Wed, 21 Apr 2021 18:36:47 +0200 Original-Received: from localhost ([::1]:56140 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1lZFqG-0000Vq-R3 for ged-emacs-devel@m.gmane-mx.org; Wed, 21 Apr 2021 12:36:46 -0400 Original-Received: from eggs.gnu.org ([2001:470:142:3::10]:35214) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1lZFmz-0006oY-44 for emacs-devel@gnu.org; Wed, 21 Apr 2021 12:33:21 -0400 Original-Received: from mail-lj1-x229.google.com ([2a00:1450:4864:20::229]:46696) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1lZFmu-0006CY-Jb; Wed, 21 Apr 2021 12:33:20 -0400 Original-Received: by mail-lj1-x229.google.com with SMTP id u20so48419866lja.13; Wed, 21 Apr 2021 09:33:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:subject:to:cc:references:message-id:date:user-agent :mime-version:in-reply-to:content-transfer-encoding:content-language; bh=YA1jkm1MTvnYxr66A7f56NLjMG69HiSBKViLygIraYs=; b=ZBRXd70yhSlRgxa9tbU3Ctsy4GQ3BhkjRAB6tSIlqWmjhdb3LhSu+s7JwV9+CQdO4B BgQPPPjCEXjQF7ik3P6ZtCg9jVnMe65bXreu38Iqj8eZMZUn2mKvsMNJDjIJsPjvf8Io meNp4+VlPLIsORtzIHYt1XFl9iWPaC8F+Mlt6SSPGUXfmvITv30vTiu4hfZwOjXl8vS/ 9VwH6ddYrHa6KgbhRJ1ZOOsPM7tvyIlctscNAqDtKVLxxeY0LR1PrNrnME/Ht1Uimc54 mQBNB1u1CgTM2xGfmZOcVj9CDOIj8Cg2MNcU0XIhPugpM1SvPxe/CvD8X5agOKGKsFUD 0x+g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:subject:to:cc:references:message-id:date :user-agent:mime-version:in-reply-to:content-transfer-encoding :content-language; bh=YA1jkm1MTvnYxr66A7f56NLjMG69HiSBKViLygIraYs=; b=tlyRDJMuUQG5YC0VdQA/4VbR6i14ce1fXVft/djgGmls6r8x5mx60pMVuyPo0lq/Ut yw6vllVslGwpLM5i+Wvkl4as8B82VcNudVXv3XG3SH4Sz8R1OBqGeiEjyaRseb1Ldu0T ugUuT5ffDYA3TfgPa0jZZmWeESXZRufFNOK4pQHp5OvI5hBvOfAZHzXsm52aEjmTBVBk F/bzlIqD3ri12ppC3i1E17944PyleKhaJFoS7aiU9FFJMj0ZCsAlBx3LjL/RtfIH2OC4 7eNYuBA+UVYH2l6oNcHliX+0zC6+Je3hspA2xarnKUN2dehrLtsiKalj0HmBW5oHeHV1 vtYQ== X-Gm-Message-State: AOAM5321VEO941tZ3z4mxGsffd/evq1/LqdTXsyRIBYUeG1IoSLcyYXM U4CTaeyQF4cgEGwm52o+QJE5vtAe1jM= X-Google-Smtp-Source: ABdhPJw6U5lsBpb/I9L5msT7fX3nH2WL6/d6wjxGI+vwmCwCpIDh4HFMklrvZhheXv31GwrjFz9tgw== X-Received: by 2002:a2e:b0dc:: with SMTP id g28mr19396290ljl.142.1619022793205; Wed, 21 Apr 2021 09:33:13 -0700 (PDT) Original-Received: from ?IPv6:2a02:2168:b115:9d00:ca94:3043:5759:639? ([2a02:2168:b115:9d00:ca94:3043:5759:639]) by smtp.gmail.com with ESMTPSA id v1sm5718lfi.234.2021.04.21.09.33.12 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 21 Apr 2021 09:33:12 -0700 (PDT) X-Google-Original-From: Nikolay Kudryavtsev In-Reply-To: <83o8eevwym.fsf@gnu.org> Content-Language: en-US Received-SPF: pass client-ip=2a00:1450:4864:20::229; envelope-from=nikolay.kudryavtsev@gmail.com; helo=mail-lj1-x229.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, NICE_REPLY_A=-0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane-mx.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.io gmane.emacs.devel:268239 Archived-At: Eli, you were correct. Msys2 developers enabled ASLR by default in binutils 2.36 ( https://www.msys2.org/news/#2021-01-31-aslr-enabled-by-default ). I was able to avoid the segfault by adding those switches to LD_SWITCH_SYSTEM_TEMACS in src/Makefile. Adding them as generic LDFLAGS works too. Maybe it's worth documenting this problem in nt/INSTALL.W64, but since unexec is kinda deprecated I'm not entirely sure... This leaves only the main branch unexec problem. I was able to reproduce it with MinGW. I'll report later if my debugging results in any other useful info.