Date: Sun, 5 Aug 2012 17:31:19 +0200 (CEST) From: Juergen Lock <nox@jelal.kn-bremen.de> To: gljennjohn@googlemail.com Cc: kib@freebsd.org, current@freebsd.org, freebsd-ports@freebsd.org Subject: Segfault in rtld - dlopen RTLD_LAZY (was: Re: CFT: vlc 2.0.3 - want to know where it works and where only partly) Message-ID: <201208051531.q75FVJjO087729@triton8.kn-bremen.de> In-Reply-To: <20120804110952.4f3a9cfd@ernst.jennejohn.org> References: <20120730191515.GA9678@triton8.kn-bremen.de> <20120801213128.7956cef34d5f5a5419f78de2@alkumuna.eu> <201208021921.q72JLT4k040018@triton8.kn-bremen.de> <1361725.y2QOXzX10J@pcoliver.heesakkers.info> <20120802205625.GA43980@triton8.kn-bremen.de> <20120803142711.1cb981b3@ernst.jennejohn.org> <501BE795.8070407@gwdg.de> <20120803163633.GA2046@triton8.kn-bremen.de> <20120804110952.4f3a9cfd@ernst.jennejohn.org>
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Hi kib, -current, seems we have a segfault in rtld when updating the multimedia/vlc port from the version currently in ports to the 2.0.3 CFT version from here: http://people.freebsd.org/~nox/tmp/vlc-2.0.3-006.patch (If you test the LIVEMEDIA knob you also need this update: http://people.freebsd.org/~nox/tmp/livemedia-20120404-001.patch ) In article <20120804110952.4f3a9cfd@ernst.jennejohn.org> you write: >On Fri, 3 Aug 2012 18:36:33 +0200 >Juergen Lock <nox@jelal.kn-bremen.de> wrote: > >> On Fri, Aug 03, 2012 at 05:00:37PM +0200, Rainer Hurling wrote: >> > On 03.08.2012 14:27 (UTC+2), Gary Jennejohn wrote: >> > > On Thu, 2 Aug 2012 22:56:26 +0200 >> > > Juergen Lock <nox@jelal.kn-bremen.de> wrote: >> > > >> > > [trimmed irrelevant content] >> > >> Ok I added that check: >> > >> >> > >> http://people.freebsd.org/~nox/tmp/vlc-2.0.3-005.patch >> > >> >> > >> Enjoy, :) >> > >> >> > > >> > > AMD64 on HEAD. >> > > >> > > I always get this error, no matter which patch I use: >> > > >> > > GEN ../modules/plugins.dat >> > > gmake[2]: *** [../modules/plugins.dat] Segmentation fault: 11 (core dumped) >> > > gmake[2]: Leaving directory `/usr/ports/multimedia/vlc/work/vlc-2.0.3/bin' >> > > gmake[1]: *** [all-recursive] Error 1 >> > > gmake[1]: Leaving directory `/usr/ports/multimedia/vlc/work/vlc-2.0.3' >> > > gmake: *** [all] Error 2 >> > > *** [do-build] Error code 1 >> > >> > I get exactly the same error with CURRENT amd64. >> > >> Hm how old are both your installed src and ports? You two are the >> first to report this and I just tried to reproduce it on a head >> checkout from May 13 and ports from June 18, and couldn't. >> > >I update the ports and source trees almost every day. I do not install >new ports binaries unless absolutely necessary, so the ports binaries >are pretty much rather old. > >Just installed a new world/kernel today (updated yesterdya), r239006. > >> > BTW, mplayer from ports does not build with liveMedia-20120404 ... >> > >> > > Stop in /usr/ports/multimedia/vlc. >> > > *** [build] Error code 1 >> > > >> > > and there's a work/vlc-2.0.3/bin/vlc-cache-gen.core generated. >> > > >> > > May be because I have a mix of old and new dependencies, although the vlc >> > > port never tries to update any of them. >> > > >> Well ports never update dependencies themselves, you need to use >> tools like portmaster for that. >> > >I avoid using tools whenever possible. Maybe I will have to try >portmaster, but I dread seeing 50 ports updated just because I >want to update one port. > >I turned on -g in make.conf and ran vlc-cache-gen in gdb. Here's the >result. > >gdb /usr/ports/multimedia/vlc/work/vlc-2.0.3/bin/.libs/vlc-cache-gen >GNU gdb 6.1.1 [FreeBSD] >Copyright 2004 Free Software Foundation, Inc. >GDB is free software, covered by the GNU General Public License, and you are >welcome to change it and/or distribute copies of it under certain conditions. >Type "show copying" to see the conditions. >There is absolutely no warranty for GDB. Type "show warranty" for details. >This GDB was configured as "amd64-marcel-freebsd"... >(gdb) r ../modules/ >Starting program: /usr/ports/multimedia/vlc/work/vlc-2.0.3/bin/.libs/vlc-cache-gen ../modules/ >[New LWP 100125] >[New Thread 802406400 (LWP 100125/vlc-cache-gen)] > >Program received signal SIGSEGV, Segmentation fault. >[Switching to Thread 802406400 (LWP 100125/vlc-cache-gen)] >0x0000000800606588 in matched_symbol () from /libexec/ld-elf.so.1 >(gdb) bt >#0 0x0000000800606588 in matched_symbol () from /libexec/ld-elf.so.1 >#1 0x00000008006087e4 in symlook_obj () from /libexec/ld-elf.so.1 >#2 0x0000000800608ae7 in symlook_list () from /libexec/ld-elf.so.1 >#3 0x000000080060911b in symlook_default () from /libexec/ld-elf.so.1 >#4 0x000000080060939d in find_symdef () from /libexec/ld-elf.so.1 >#5 0x000000080060375b in reloc_non_plt () from /libexec/ld-elf.so.1 >#6 0x0000000800606ae8 in relocate_object () from /libexec/ld-elf.so.1 >#7 0x00000008006084a8 in dlopen_object () from /libexec/ld-elf.so.1 >#8 0x0000000800608f67 in rtld_dlopen () from /libexec/ld-elf.so.1 >#9 0x0000000800affe95 in module_Load (p_this=0x80244c198, > psz_file=0x802472c00 "../modules//codec/.libs/libfluidsynth_plugin.so", > p_handle=0x7fffffffd180, lazy=true) at posix/plugin.c:62 >#10 0x0000000800adef4b in module_InitDynamic (obj=0x80244c198, > path=0x802472c00 "../modules//codec/.libs/libfluidsynth_plugin.so", > fast=true) at modules/bank.c:536 >#11 0x0000000800adede2 in AllocatePluginFile (bank=0x7fffffffd490, > abspath=0x802472c00 "../modules//codec/.libs/libfluidsynth_plugin.so", > relpath=0x802472b80 "codec/.libs/libfluidsynth_plugin.so", > st=0x7fffffffd210) at modules/bank.c:479 >#12 0x0000000800adeca3 in AllocatePluginDir (bank=0x7fffffffd490, maxdepth=2, > absdir=0x802472b00 "../modules//codec/.libs", > reldir=0x802472a80 "codec/.libs") at modules/bank.c:440 >#13 0x0000000800adecd7 in AllocatePluginDir (bank=0x7fffffffd490, maxdepth=3, > absdir=0x802472a00 "../modules//codec", reldir=0x8024704f0 "codec") > at modules/bank.c:444 >#14 0x0000000800adecd7 in AllocatePluginDir (bank=0x7fffffffd490, maxdepth=4, > absdir=0x802452c20 "../modules/", reldir=0x0) at modules/bank.c:444 >#15 0x0000000800ade9b8 in AllocatePluginPath (p_this=0x80244c198, > path=0x802452c20 "../modules/", mode=CACHE_USE) at modules/bank.c:353 >#16 0x0000000800ade823 in AllocateAllPlugins (p_this=0x80244c198) > at modules/bank.c:298 >#17 0x0000000800ade55d in module_LoadPlugins (obj=0x80244c198) > at modules/bank.c:189 >#18 0x0000000800a53e63 in libvlc_InternalInit (p_libvlc=0x80244c198, i_argc=3, > ppsz_argv=0x7fffffffd6f0) at libvlc.c:247 >#19 0x000000080082234d in libvlc_new (argc=2, argv=0x7fffffffd7a0) at core.c:59 >#20 0x0000000000400d1c in main (argc=2, argv=0x7fffffffd858) at cachegen.c:107 >(gdb) > >If I remove enough plugins then I can build and install vlc, but the >result isn't very useful. > >The old port builds, installs and works just fine with all the plugins I >want to use so I'll stick to it. I Cc'd -current and kib (who did the majority of the recent rtld commits), maybe he has an idea. Seems dlopen() was called from here, /usr/ports/multimedia/vlc/work/vlc-2.0.3/src/posix/plugin.c , line 62: /** * Load a dynamically linked library using a system dependent method. * * \param p_this vlc object * \param psz_file library file * \param p_handle the module handle returned * \return 0 on success as well as the module handle. */ int module_Load( vlc_object_t *p_this, const char *psz_file, module_handle_t *p_handle, bool lazy ) { #if defined (RTLD_NOW) const int flags = lazy ? RTLD_LAZY : RTLD_NOW; #elif defined (DL_LAZY) const int flags = DL_LAZY; #else const int flags = 0; #endif char *path = ToLocale( psz_file ); module_handle_t handle = dlopen( path, flags ); if( handle == NULL ) { msg_Warn( p_this, "cannot load module `%s' (%s)", path, dlerror() ); LocaleFree( path ); return -1; } LocaleFree( path ); *p_handle = handle; return 0; } Thanx, :) Juergen
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