Date: Sun, 5 Aug 2012 19:13:53 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: Juergen Lock <nox@jelal.kn-bremen.de> Cc: current@freebsd.org, freebsd-ports@freebsd.org Subject: Re: 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: <20120805161353.GF2676@deviant.kiev.zoral.com.ua> In-Reply-To: <201208051531.q75FVJjO087729@triton8.kn-bremen.de> 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> <201208051531.q75FVJjO087729@triton8.kn-bremen.de>
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--l3V33RQEOxIe3sMQ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sun, Aug 05, 2012 at 05:31:19PM +0200, Juergen Lock wrote: > 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: >=20 > http://people.freebsd.org/~nox/tmp/vlc-2.0.3-006.patch >=20 > (If you test the LIVEMEDIA knob you also need this update: >=20 > http://people.freebsd.org/~nox/tmp/livemedia-20120404-001.patch >=20 > ) Please do two things. 1. Provide me the output of readelf -a for the module that was loaded. 2. Recompile rtld with debug symbols and redo the build to get the useful backtrace from core: cd /usr/src/libexec/rtld-elf make clean make all install DEBUG_FLAGS=3D-g >=20 > 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 (cor= e 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 > >> >=20 > >> > I get exactly the same error with CURRENT amd64. > >> >=20 > >> 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. > >>=20 > > > >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 ... > >> >=20 > >> > > 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. > >>=20 > > > >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 condit= ions. > >Type "show copying" to see the conditions. > >There is absolutely no warranty for GDB. Type "show warranty" for detai= ls. > >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=3D0x80244c198, > > psz_file=3D0x802472c00 "../modules//codec/.libs/libfluidsynth_plugin= .so", > > p_handle=3D0x7fffffffd180, lazy=3Dtrue) at posix/plugin.c:62 > >#10 0x0000000800adef4b in module_InitDynamic (obj=3D0x80244c198, > > path=3D0x802472c00 "../modules//codec/.libs/libfluidsynth_plugin.so", > > fast=3Dtrue) at modules/bank.c:536 > >#11 0x0000000800adede2 in AllocatePluginFile (bank=3D0x7fffffffd490, > > abspath=3D0x802472c00 "../modules//codec/.libs/libfluidsynth_plugin.= so", > > relpath=3D0x802472b80 "codec/.libs/libfluidsynth_plugin.so", > > st=3D0x7fffffffd210) at modules/bank.c:479 > >#12 0x0000000800adeca3 in AllocatePluginDir (bank=3D0x7fffffffd490, maxd= epth=3D2, > > absdir=3D0x802472b00 "../modules//codec/.libs", > > reldir=3D0x802472a80 "codec/.libs") at modules/bank.c:440 > >#13 0x0000000800adecd7 in AllocatePluginDir (bank=3D0x7fffffffd490, maxd= epth=3D3, > > absdir=3D0x802472a00 "../modules//codec", reldir=3D0x8024704f0 "code= c") > > at modules/bank.c:444 > >#14 0x0000000800adecd7 in AllocatePluginDir (bank=3D0x7fffffffd490, maxd= epth=3D4, > > absdir=3D0x802452c20 "../modules/", reldir=3D0x0) at modules/bank.c:= 444 > >#15 0x0000000800ade9b8 in AllocatePluginPath (p_this=3D0x80244c198, > > path=3D0x802452c20 "../modules/", mode=3DCACHE_USE) at modules/bank.= c:353 > >#16 0x0000000800ade823 in AllocateAllPlugins (p_this=3D0x80244c198) > > at modules/bank.c:298 > >#17 0x0000000800ade55d in module_LoadPlugins (obj=3D0x80244c198) > > at modules/bank.c:189 > >#18 0x0000000800a53e63 in libvlc_InternalInit (p_libvlc=3D0x80244c198, i= _argc=3D3, > > ppsz_argv=3D0x7fffffffd6f0) at libvlc.c:247 > >#19 0x000000080082234d in libvlc_new (argc=3D2, argv=3D0x7fffffffd7a0) a= t core.c:59 > >#20 0x0000000000400d1c in main (argc=3D2, argv=3D0x7fffffffd858) at cach= egen.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. >=20 > 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: >=20 > /** > * 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 =3D lazy ? RTLD_LAZY : RTLD_NOW; > #elif defined (DL_LAZY) > const int flags =3D DL_LAZY; > #else > const int flags =3D 0; > #endif > char *path =3D ToLocale( psz_file ); >=20 > module_handle_t handle =3D dlopen( path, flags ); > if( handle =3D=3D NULL ) > { > msg_Warn( p_this, "cannot load module `%s' (%s)", path, dlerror()= ); > LocaleFree( path ); > return -1; > } > LocaleFree( path ); > *p_handle =3D handle; > return 0; > } >=20 > Thanx, :) > Juergen --l3V33RQEOxIe3sMQ Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (FreeBSD) iEYEARECAAYFAlAem8EACgkQC3+MBN1Mb4h/9QCg7Iq+v1Yg0TfVEAt7n8NQFfDa olsAn1zZMurAAPw34FHF5jwTT5U7IzTU =7pP6 -----END PGP SIGNATURE----- --l3V33RQEOxIe3sMQ--
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