Date: Tue, 22 Nov 2011 08:43:50 -0500 From: Michael Butler <imb@protected-networks.net> To: David Chisnall <theraven@FreeBSD.org> Cc: current <current@freebsd.org> Subject: Re: did SVN r227753 (locale changes) break something? Message-ID: <4ECBA716.2080808@protected-networks.net> In-Reply-To: <52C052B0-EFBD-4044-937A-669F475A0FD4@FreeBSD.org> References: <4ECAEAFD.5010404@protected-networks.net> <18810925-DC65-4D9B-9508-2B5153BDC3D5@FreeBSD.org> <4ECBA4D7.7070607@protected-networks.net> <52C052B0-EFBD-4044-937A-669F475A0FD4@FreeBSD.org>
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On 11/22/11 08:37, David Chisnall wrote: > Do you have valgrind installed? It would probably also be helpful to see the results from that. With symbols for libc .. #0 xlocale_retain (val=0x0) at atomic.h:363 363 ATOMIC_ASM(add, long, "addl %1,%0", "ir", v); [New Thread 28804300 (LWP 100592/vlc)] (gdb) bt #0 xlocale_retain (val=0x0) at atomic.h:363 #1 0x283eb568 in dupcomponent (type=3, base=Variable "base" is not available. ) at /usr/home/imb/svn/head/lib/libc/locale/xlocale.c:204 #2 0x283eb709 in newlocale (mask=Variable "mask" is not available. ) at /usr/home/imb/svn/head/lib/libc/locale/xlocale.c:250 #3 0x281637f2 in msg_Subscribe () from /usr/local/lib/libvlccore.so.4 #4 0x00000000 in ?? () #5 0x28191f6f in .rodata () from /usr/local/lib/libvlccore.so.4 #6 0x28420120 in __xlocale_global_locale () from /lib/libc.so.7 #7 0x00000000 in ?? () #8 0x281a3ee0 in .got () from /usr/local/lib/libvlccore.so.4 #9 0x288400fc in ?? () #10 0x288400fc in ?? () #11 0x280ca9b6 in libvlc_InternalCreate () from /usr/local/lib/libvlccore.so.4 #12 0x281a4df4 in .bss () from /usr/local/lib/libvlccore.so.4 #13 0x0000005c in ?? () #14 0xfffffd66 in ?? () #15 0x281861d4 in .rodata () from /usr/local/lib/libvlccore.so.4 #16 0x00000440 in ?? () #17 0x00000001 in ?? () #18 0x00000000 in ?? () #19 0x280b4ad0 in .got () from /usr/local/lib/libvlc.so.7 #20 0xbfbfe640 in ?? () #21 0x00000002 in ?? () #22 0xbfbfe678 in ?? () #23 0x280a39b2 in libvlc_new () from /usr/local/lib/libvlc.so.7 Previous frame inner to this frame (corrupt stack?) .. and valgrind shows .. imb@toshi:/home/imb> valgrind vlc ==41007== Memcheck, a memory error detector ==41007== Copyright (C) 2002-2010, and GNU GPL'd, by Julian Seward et al. ==41007== Using Valgrind-3.6.1 and LibVEX; rerun with -h for copyright info ==41007== Command: vlc ==41007== VLC media player 1.1.12 The Luggage (revision exported) ==41007== Invalid read of size 4 ==41007== at 0x3BC253: ??? (atomic.h:363) ==41007== by 0x3BC567: ??? (xlocale.c:204) ==41007== by 0x3BC708: newlocale (xlocale.c:250) ==41007== by 0x1347F1: msg_Create (in /usr/local/lib/libvlccore.so.4) ==41007== Address 0x0 is not stack'd, malloc'd or (recently) free'd ==41007== ==41007== ==41007== Process terminating with default action of signal 11 (SIGSEGV): dumping core ==41007== Access not within mapped region at address 0x0 ==41007== at 0x3BC253: ??? (atomic.h:363) ==41007== by 0x3BC567: ??? (xlocale.c:204) ==41007== by 0x3BC708: newlocale (xlocale.c:250) ==41007== by 0x1347F1: msg_Create (in /usr/local/lib/libvlccore.so.4) ==41007== If you believe this happened as a result of a stack ==41007== overflow in your program's main thread (unlikely but ==41007== possible), you can try to increase the size of the ==41007== main thread stack using the --main-stacksize= flag. ==41007== The main thread stack size used in this run was 16777216. ==41007== ==41007== HEAP SUMMARY: ==41007== in use at exit: 9,284 bytes in 76 blocks ==41007== total heap usage: 79 allocs, 3 frees, 9,316 bytes allocated ==41007== ==41007== LEAK SUMMARY: ==41007== definitely lost: 0 bytes in 0 blocks ==41007== indirectly lost: 0 bytes in 0 blocks ==41007== possibly lost: 554 bytes in 13 blocks ==41007== still reachable: 8,730 bytes in 63 blocks ==41007== suppressed: 0 bytes in 0 blocks ==41007== Rerun with --leak-check=full to see details of leaked memory ==41007== ==41007== For counts of detected and suppressed errors, rerun with: -v ==41007== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0) Segmentation fault .. so it looks like a NULL pointer but I guess I need to recompile libvlc to see if it's involved, imb
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