amd64+gdb -- instant reboot (BETA5 and 4)
scottl at samsco.org
Wed Sep 21 23:36:24 PDT 2005
Mikhail T. wrote:
> I was trying to use gdb to debug a program (audio/timidity++) on
> my 6.0-BETA4.
> It would play fine, and then I'll interrupt it with Ctrl-C to enter the
> debugger. If I then try to exit the debugger, the whole system will
> reboot instantaniously.
> I sync-ed to today's sources (BETA5) and added WITNESS, WITNESS_KDB,
> INVARIANTS, and INVARIANT_SUPPORT (strangly, INVARIANTS requires, but
> does not imply INVARIANT_SUPPORT).
> With BETA5 the story is exactly the same -- instant reboot.
> Sometimes I can see two lines of debug messages (lock order reversal?)
> flushed on the console, but the machine reboots too quickly to read
> them beyond:
> 1 ....................
> 2 ....................
> Is this gdb misbehaviour a known problem? How can I have the system
> avoid rebooting? Crash-dumping is enabled, but does not take place :-(
> Is that because timidity uses threads, perhaps?
It's definitely not known. Any chance you could hook up a serial
console to log the output. It'll be pretty hard to debug otherwise.
Sounds like you're likely getting a triple fault.
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