* pausing gdb
@ 2004-08-04 23:09 Qing Zhang
2004-08-05 0:24 ` Andrew Cagney
0 siblings, 1 reply; 2+ messages in thread
From: Qing Zhang @ 2004-08-04 23:09 UTC (permalink / raw)
To: gdb
Hi,
Can anyone tell me how ctrl-c is handled in gdb? More importantly how
is gdb able to continue from a sigint.
your help is much appreciated.
-Christene
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: pausing gdb
2004-08-04 23:09 pausing gdb Qing Zhang
@ 2004-08-05 0:24 ` Andrew Cagney
0 siblings, 0 replies; 2+ messages in thread
From: Andrew Cagney @ 2004-08-05 0:24 UTC (permalink / raw)
To: Qing Zhang; +Cc: gdb
> Hi,
>
> Can anyone tell me how ctrl-c is handled in gdb? More importantly how
> is gdb able to continue from a sigint.
>
> your help is much appreciated.
I'm assuming this is UNIX. Check the man pages for ptrace, and wait.
The sequence, assuming that GDB's attached to the process (aka inferior):
- GDB's blocked on wait() ; inferior process running
- user enters CNTRL-C
- kernel, instead of delivering cntrl-c to inferior process, unblocks
GDB returning a ``SIGINT'' indication for that wait() call
- GDB interacts with user
- user enters "continue"
- gdb does ptrace (continue)
- kernel resumes inferior process (signal is never delivered)
Andrew
^ permalink raw reply [flat|nested] 2+ messages in thread
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2004-08-04 23:09 pausing gdb Qing Zhang
2004-08-05 0:24 ` Andrew Cagney
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