On 04/06/2009 07:19 AM, Amos Jeffries wrote:
> Anyone able to say what this means?
> 
> Found while testing 3.1-BZR rev 9483
> 
> Program received signal SIGABRT, Aborted.
> [Switching to Thread 0xb7541b90 (LWP 29220)]
> 0xb7fce410 in __kernel_vsyscall ()
> #0  0xb7fce410 in __kernel_vsyscall ()
> #1  0xb7b73085 in raise () from /lib/tls/i686/cmov/libc.so.6
> #2  0xb7b74a01 in abort () from /lib/tls/i686/cmov/libc.so.6
> 
> #3  0x080f2cd5 in Debug::xassert (msg=0x82210f8 "CurrentDebug",
> file=0x82210a4 "../../SQUID_3_1/src/debug.cc", line=709)
>     at ../../SQUID_3_1/src/debug.cc:745
> 
> #4  0x080f3215 in Debug::getDebugOut () at ../../SQUID_3_1/src/debug.cc:709
> 
> #5  0x0810e0fc in fd_open (fd=20, type=4, desc=0x823e144 "async-io
> completetion event: main") at ../../SQUID_3_1/src/fd.cc:187
> 
> #6  0x081b2ab5 in CommIO::Initialise () at ../../SQUID_3_1/src/comm.cc:2302
> #7  0x0820570f in squidaio_thread_loop (ptr=0x874ac84) at
> ../../SQUID_3_1/src/CommIO.h:30
> #8  0xb7fa64fb in start_thread () from /lib/tls/i686/cmov/libpthread.so.0
> #9  0xb7c1ee5e in clone () from /lib/tls/i686/cmov/libc.so.6


Looks like Debug::TheDepth is out of sync with CurrentDebug in your
example. AFAIK, Squid debugging is not thread-safe so if some non-main
thread calls debugging functions (directly or not), things will break.

HTH,

Alex.

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