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From:	"Kris Thielemans" <kris DOT thielemans AT imperial DOT ac DOT uk>
To:	<cygwin AT cygwin DOT com>
Subject:	gdb: interrupt program with ctrl-C works, but cannot continue
Date:	Sat, 18 Jan 2014 10:51:22 -0000
Message-ID:	<00c501cf143b$3ab721e0$b02565a0$@imperial.ac.uk>
MIME-Version:	1.0
X-IC-MsgID:	1W4TUY-0001JO-Tp

Hi

I'm using Cygwin gdb 7.6.50.20130728-cvs (cygwin-special) to debug my
program compiled with cygwin g++ 4.8.2. I'm trying to interrupt my program
with ctrl-C to see where it is (info stack), and then to use "continue" to
keep on going. Unfortunately, after this, my program exits (gdb doesn't). I
see something like this in the gdb window:

Program received signal SIGINT, Interrupt.
Quit
(gdb) c
Continuing.
[Inferior 1 (process 22828) exited with code 01000]

Clearly, the interrupt gets passed to the program, which in this case I
don't want. I'm fairly sure that half a year ago, this wasn't the case (i.e.
I could continue my program from wherever it was).

Pressing ctrl-break seems even worse:
Program received signal SIGQUIT, Quit.
0x004b8bcc in stir::UCL::CListEventECAT8_32bit::get_detection_position
(this=0x8004f914, det_pos=...)
    at
/home/kris/devel/INM/STIR-UCL/src/listmode_buildblock/CListRecordECAT8_32bit
.cxx:58
58        const int tang_pos_num = this->data.offset %
num_tangential_poss;//(this->num_sinograms * this-> num_views);
(gdb) c
Continuing.
    198 [main] lm_to_projdata 26288 open_stackdumpfile: Dumping stack trace
to lm_to_projdata.exe.stackdump
[Inferior 1 (process 26288) exited with code 0101400]

Is there some command I can type in the gdb prompt to achieve what I want?
I'm guessing "handle" should do it, but I cannot figure it out.

Thanks

Kris

PS: running latest Cygwin 32-bit version.


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