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From: Alexander Petukhov <devel@apetukhov.ru>
To: Joel Brobecker <brobecker@adacore.com>
Cc: gdb@sourceware.org
Subject: Re: proper usage of "-exec-interrupt"
Date: Mon, 19 Sep 2011 14:13:00 -0000	[thread overview]
Message-ID: <4E774DE7.20606@apetukhov.ru> (raw)
In-Reply-To: <20110917190624.GQ12670@adacore.com>

On 9/17/11 11:06 PM, Joel Brobecker wrote:
>> Whay does this signal come to parent process and can I avoid this
>> somehow?
> This is a bit of a guess, since I don't remember all the details,
> but I think it might be a question of process group. To implement
> the interrupt, many targets simply send a SIGINT signal to the
> inferior process group. If you spawned GDB within the same process
> group as GDB, and both GDB and the program being debugged share
> the same process group as well, the interrupt will cause SIGINT
> to be received by your IDE as well. So, try spawning GDB in its
> own process group.
>
I tried to move gdb into a distinct group with "setpgid(gdb_pid, 0)", 
right after spawning it with "g_spawn_async_with_pipes".
If I do so SIGINT doesn't come to IDE but a program being debugged quits 
right after executing "-exec-interrupt".
The gdb output is:

^done
(gdb)
&"Quit\n"
=thread-exited, .....
=thread-group-exited,....
*stopped,reason="exited-normally"

I also tried to do all this executing gdb from a terminal window and a 
program had stopped correctly with stop reason="signal-received", no 
quits...

Can't it be a bug, I've found several discussions with suggestions to 
send SIGINT or SIGTSTP directly to a process being debugged instead of 
using "-exec-interrupt" ?

      reply	other threads:[~2011-09-19 14:13 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-09-17  7:17 Alexander Petukhov
2011-09-17 19:06 ` Joel Brobecker
2011-09-19 14:13   ` Alexander Petukhov [this message]

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