reassign 567415 libarts1c2a thanks On Thu, Feb 04, 2010 at 05:32:00PM -0500, Gary Dale wrote: > Mike Hommey wrote: > >On Mon, Feb 01, 2010 at 10:15:05AM -0500, Gary Dale wrote: > >>Mike Hommey wrote: > >>>On Fri, Jan 29, 2010 at 03:42:20PM -0500, Gary Dale wrote: > >>>>Is there something else I need to send you? > >>>> > >>>The same backtrace with xulrunner-1.9.1-dbg installed would be helpful, > >>>though I can already give you a workaround: set ICEWEASEL_DSP to none in > >>>/etc/iceweasel/iceweaselrc. > >>> > >>>Mike > >>> > >>I seem to have xulrunner-1.9.1-dbg already installed. Is there > >>something I need to do to get it active? > > > >Oh then, your crash is likely to be unrelated to xulrunner. Can you > >install libc6-dbg and get a new backtrace ? > > > >Mike > > > I seemed to have libc6-dbg installed already also. Anyway here's the > latest trace, which looks the same as the earlier one. > (snip)
I could reproduce the crash, and with arts-dbg, it gets clearer: #0 0x0000000000000000 in ?? () #1 0x00007f56ad21ae8d in open (pathname=0x411609 "/proc/cpuinfo", flags=0) at /build/buildd/arts-1.5.9/./artsc/artsdsp.c:233 #2 0x000000000040cd84 in ?? () #3 0x000000000040e525 in calloc () #4 0x00007f56ace10360 in _dlerror_run (operate=0x7f56ace100b0 <dlsym_doit>, args=0x7fff79dd5cc0) at dlerror.c:142 #5 0x00007f56ace1007a in __dlsym (handle=<value optimized out>, name=<value optimized out>) at dlsym.c:71 #6 0x00007f56ad219dc5 in artsdsp_doinit () at /build/buildd/arts-1.5.9/./artsc/artsdsp.c:148 #7 0x00007f56ad21a017 in access (pathname=0x7fff79dd6d30 "/usr/lib/iceweasel/xulrunner/libxpcom.so", mode=4) at /build/buildd/arts-1.5.9/./artsc/artsdsp.c:571 This is the same pattern as #550674 in padsp, but instead of deadlocking, this one crashes. This is what happens: - something in nsXULStub calls access() before jemalloc is initialized. - access() is caught by artsdsp, which starts resolving all the symbols it needs with dlsym() through artsdsp_doinit(). - dlsym() ends up allocating memory, which triggers jemalloc initialization code. - jemalloc init code open()s /proc/cpuinfo. - open() is caught by artsdsp, which tries to call the original open() it got from dlsym(), except it is in dlsym(), so orig_open is still NULL. Thus the crash. This is IMHO a bug in artsdsp assuming it can call dlsym without looping back in itself. The best thing IMHO would be to have a constructor function that does the symbol resolution at startup. Mike -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
