From owner-freebsd-current@freebsd.org Wed Sep 20 07:16:50 2017 Return-Path: Delivered-To: freebsd-current@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id DB86EE27253 for ; Wed, 20 Sep 2017 07:16:50 +0000 (UTC) (envelope-from zakharov.vv@gmail.com) Received: from mail-lf0-x22b.google.com (mail-lf0-x22b.google.com [IPv6:2a00:1450:4010:c07::22b]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 5B4A683517; Wed, 20 Sep 2017 07:16:50 +0000 (UTC) (envelope-from zakharov.vv@gmail.com) Received: by mail-lf0-x22b.google.com with SMTP id u21so1740582lfk.12; Wed, 20 Sep 2017 00:16:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=n7zkxbc0U6L6YPPM9Fr5nwwPvsfzpAqfWI+qw6OGrpg=; b=KAX9S1WxqBITrbszRyZuv69fPqTT8ggnyMWGE9WYHtrSXyYtxw/jOn59mOI2G+Zay4 gDPYORrQTfjFrEWMT/cQY28Q9UWX0ouykEW6gclJEYL67ntd3mpRhByjN8w1En1uoU6/ RH1G9l7njsFdOwiCtMjHwzk1qmjKG4nd8wObQIF0nc3FmtSNczaXSuZXCMUfZ5mFwek8 wlEc4urRqKFWIniYczrYLt412NyMyeRvmkM0SPXh/M20Qcm9uR6fZZdPtMZNg9ih9SAE dNnzCc9xiHSXDjh68JjwNGg0vQBZCIjn65IpB5/1e9L1fpVToACUmJcuv1PyrUNNRuAK oYPg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=n7zkxbc0U6L6YPPM9Fr5nwwPvsfzpAqfWI+qw6OGrpg=; b=mbvKnoaqqe7EIN19nT6sKgB/Ldb2BXzPs8Ih5c7cd9EKY7qr0aLWGHOmNFuqaC+iww 9L+JEHNXr4BnBk97Ovv8xXzt9O1wN7CHKGMWHdMx/ORkpTiy+KeUDh/4BcubkyjA0kul vwhye40aSBiszh3XRA1jGlB2e8E3g/9AewokXP7zK85H63qKoOXsBtKPGHLXkxAPYjkg OZ/qnaX/mdkjQ119JxPtjo5KqYOKOgrqmNASYY2+t/KWtObvhS976AYYuvN46GfoYk8z QQ8U48WXKmSCLEatGvYCuZzW/f7kPiM4Ba4FjtpHvbtdSQz1hHSys4P2nnVVyktX8xUl V8LQ== X-Gm-Message-State: AHPjjUj5gPc44OXXeU6hgqeMIdxTRDHP1RWLlne+ClgJI3pqho3eXsbF Hf7KctmnassXMz4iOti4CCndIki1 X-Google-Smtp-Source: AOwi7QDs7FuLC/NkHP0MUokMUG9VvARLznDCIdXcpIl6eZ1ZSkAX1Li2hXM3H0mZefAL9hC8PBuYFA== X-Received: by 10.46.7.26 with SMTP id 26mr1748569ljh.77.1505891808244; Wed, 20 Sep 2017 00:16:48 -0700 (PDT) Received: from localhost ([81.19.73.153]) by smtp.gmail.com with ESMTPSA id 67sm223913lfq.15.2017.09.20.00.16.47 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 20 Sep 2017 00:16:47 -0700 (PDT) Date: Wed, 20 Sep 2017 10:16:46 +0300 From: Vladimir Zakharov To: John Baldwin Cc: freebsd-current@freebsd.org Subject: Re: lldb unusable for regular user Message-ID: <20170920071646.h3deef6crx26s5wi@vzakharov> References: <20170918114106.jkmpcde6tmvhizhj@vzakharov> <1591968.Y6pkDZZxzA@ralph.baldwin.cx> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <1591968.Y6pkDZZxzA@ralph.baldwin.cx> X-Operating-System: FreeBSD 12.0-CURRENT amd64 X-PGP-Key: http://vzakharov.ru/pubkey.asc User-Agent: NeoMutt/20170912 (1.9.0) X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 20 Sep 2017 07:16:51 -0000 On Tue, Sep 19, 2017, John Baldwin wrote: > On Monday, September 18, 2017 02:41:06 PM Vladimir Zakharov wrote: > > Hello! > > > > lldb coredumps for regular user, but works for root. > > > gdb `which lldb` lldb.core > > ... > > Reading symbols from /usr/bin/lldb...Reading symbols from /usr/lib/debug//usr/bin/lldb.debug...done. > > done. > > [New LWP 101610] > > [New LWP 100968] > > [New LWP 100126] > > [New LWP 101631] > > [New LWP 101637] > > [New LWP 101662] > > [New LWP 101672] > > [New LWP 100337] > > [New LWP 101593] > > Core was generated by `lldb ./test'. > > Program terminated with signal SIGSEGV, Segmentation fault. > > #0 x86_64_freebsd_fallback_frame_state (context=0x7fffddff6e20, context=0x7fffddff6e20, fs=0x7fffddff6b70) at ./md-unwind-support.h:60 > > 60 ./md-unwind-support.h: No such file or directory. > > [Current thread is 1 (LWP 101610)] > > (gdb) f > > #0 x86_64_freebsd_fallback_frame_state (context=0x7fffddff6e20, context=0x7fffddff6e20, fs=0x7fffddff6b70) at ./md-unwind-support.h:60 > > 60 in ./md-unwind-support.h > > (gdb) bt > > #0 x86_64_freebsd_fallback_frame_state (context=0x7fffddff6e20, context=0x7fffddff6e20, fs=0x7fffddff6b70) at ./md-unwind-support.h:60 > > #1 uw_frame_state_for (context=context@entry=0x7fffddff6e20, fs=fs@entry=0x7fffddff6b70) at /wrkdirs/usr/ports/lang/gcc6/work/gcc-6.4.0/libgcc/unwind-dw2.c:1249 > > #2 0x0000000804f6cffb in _Unwind_ForcedUnwind_Phase2 (exc=exc@entry=0x806b23230, context=context@entry=0x7fffddff6e20) at /wrkdirs/usr/ports/lang/gcc6/work/gcc-6.4.0/libgcc/unwind.inc:155 > > #3 0x0000000804f6d334 in _Unwind_ForcedUnwind (exc=0x806b23230, stop=0x804631760 , stop_argument=) at /wrkdirs/usr/ports/lang/gcc6/work/gcc-6.4.0/libgcc/unwind.inc:207 > > #4 0x00000008046315c3 in _Unwind_ForcedUnwind (ex=, stop_func=0xe, stop_arg=0x806b23000) at /usr/src/lib/libthr/thread/thr_exit.c:106 > > #5 thread_unwind () at /usr/src/lib/libthr/thread/thr_exit.c:172 > > #6 _pthread_exit_mask (status=, mask=) at /usr/src/lib/libthr/thread/thr_exit.c:254 > > #7 0x00000008046313eb in _pthread_exit (status=0x806b23000) at /usr/src/lib/libthr/thread/thr_exit.c:206 > > #8 0x0000000804623c0d in thread_start (curthread=0x806b23000) at /usr/src/lib/libthr/thread/thr_create.c:289 > > #9 0x00007fffdddf7000 in ?? () > > Backtrace stopped: Cannot access memory at address 0x7fffddff7000 > > Your backtrace shows it crashed during thread exit inside of libthr, not in > lldb itself. Also, it seems you are using libgcc_s from external gcc rather > than the base system libgcc_s which is built from > contrib/llvm/projects/libunwind. If lldb dlopen'd some object that depends > on libgcc_s.so from ports gcc then that might explain this crash as it means > you are mixing two different unwind libraries. What does 'info sharedlibrary' > from gdb show? You're right, John. My environment had been polluted: $ env | grep gcc LIBRARY_PATH=/usr/local/lib/gcc6 LD_LIBRARY_PATH=/usr/local/lib/gcc6 I've deleted these variables, and lldb works now as expected. Thanks a lot -- Regards, | "In theory there is no difference between theory Vladimir Zakharov | and practice. In practice there is."- Yogi Berra