Re: www/chromium crashing whole system

On Fri, Nov 12, 2010 at 10:37:15PM +0000, Alexander Best wrote:
> hi there,
> 
> i'm having an issue with www/chromium. sometimes it will completely lock up my
> system without producing a core dump. i'm running HEAD (r215102; amd64).
Core dump of the kernel or the process ?

You probably should follow the usual procedure for the deadlock
debugging, see dev handbook.

> 
> this time however chrome.core made it to disk somehow:
> 
...

> Loaded symbols for /libexec/ld-elf.so.1
> #0  0x00000008026d76a2 in symlook_default (name=0x806797dbc "__sys_sigreturn", hash=92647454, refobj=0x802722c00, defobj_out=0x7fffffbfe160, ventry=0x802717790, flags=1) at /usr/src/libexec/rtld-elf/rtld.c:2675
Please show the output of "info locals" in the frame 0.

> 2675		symp = symlook_list(name, hash, &list_main, &obj, ventry, flags,
> [New Thread 2ee6b40 (LWP 100245)]
> [New Thread 2ee6000 (LWP 100212)]
> (gdb) bt
> #0  0x00000008026d76a2 in symlook_default (name=0x806797dbc "__sys_sigreturn", hash=92647454, refobj=0x802722c00, defobj_out=0x7fffffbfe160, ventry=0x802717790, flags=1) at /usr/src/libexec/rtld-elf/rtld.c:2675
> #1  0x00000008026d815c in find_symdef (symnum=217, refobj=0x802722c00, defobj_out=0x7fffffbfe1a8, flags=1, cache=0x0) at /usr/src/libexec/rtld-elf/rtld.c:1205
> #2  0x00000008026d8233 in _rtld_bind (obj=0x802722c00, reloff=Variable "reloff" is not available.
> ) at /usr/src/libexec/rtld-elf/rtld.c:557
> #3  0x00000008026d487d in _rtld_bind_start () at /usr/src/libexec/rtld-elf/amd64/rtld_start.S:99
> #4  0xffffffff91969eb2 in ?? ()
> #5  0x0000000000000000 in ?? ()
> #6  0x0000000000000000 in ?? ()
> #7  0xfffffffffffffbd0 in ?? ()
> #8  0x00007fffffbfe260 in ?? ()
> #9  0x00007fffffbfe260 in ?? ()
> #10 0x0000000000000000 in ?? ()
> #11 0x0000000002ee6000 in ?? ()
> #12 0x0000000002ee6cb8 in ?? ()
> #13 0x0000000000000206 in ?? ()
> #14 0x0000000000000000 in ?? ()
> #15 0x0000000802722c00 in ?? ()
> #16 0x0000000000000024 in ?? ()
> #17 0x000000080679fc26 in handle_signal (actp=Variable "actp" is not available.
> ) at /usr/src/lib/libthr/thread/thr_sig.c:254
> #18 0x000000080679fd5f in thr_sighandler (sig=20, info=0x7fffffbfea00, _ucp=0x7fffffbfe690) at /usr/src/lib/libthr/thread/thr_sig.c:181
> #19 <signal handler called>
> #20 0x00000008069cad6c in read () at read.S:3
> #21 0x000000080679dc70 in __read (fd=15, buf=0x7fffffbfef84, nbytes=4) at /usr/src/lib/libthr/thread/thr_syscalls.c:460
> #22 0x000000000043871f in (anonymous namespace)::ShutdownDetector::ThreadMain ()
> #23 0x0000000000984caa in ThreadFunc ()
> #24 0x000000080679b81e in thread_start (curthread=0x2ee6b40) at /usr/src/lib/libthr/thread/thr_create.c:273
> #25 0x0000000000000000 in ?? ()
> Cannot access memory at address 0x7fffffbff000
> 
> cheers.
> alex
> 
> -- 
> a13x
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