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From: Jerry <lanceboyle@qwest.net>
Newsgroups: comp.lang.ada
Subject: gdb will not "catch exception" or "catch exception unhandled"
Date: Thu, 6 Oct 2011 03:48:36 -0700 (PDT)
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Date: 2011-10-06T03:48:36-07:00
List-Id: <comp.lang.ada>

I'm having considerable difficulty getting gdb to break on exceptions;
in fact, I can't get it to work at all.

I'm using the AdaCore 2010 version on OS X 10.6.8, in Terminal.app:

GNU gdb (GDB) 7.1 for GNAT GPL 2010 (20100603) [rev=gdb-7.1-ref-90-
g6d5b58a]
This GDB was configured as "x86_64-apple-darwin9.6.0".

I don't think this is related, but FWIW, this happens every time I use
gdb from a terminal session (not GPS):

unable to read unknown load command 0x1a
warning: `/Volumes/Data/Builds/unix/gtk2.new/bld/pango/.libs/
libpangocairo_1_0_la-module-defs-atsui.o': can't open to read symbols:
No such file or directory.

except that there a a bazillion such gtk-related warnings. /Volumes/
Data is not my computer, but I do have gtk installed. I suppose this
is GPS-related so I don't worry about it too much.

So here's the problem. When I start a debugging session and type
catch exception
or
catch exception unhandled

gdb complains that I have to start my program running first. So I set
a breakpoint on an early line from where I type one of the above
commands, and then it accepts either command. But then my program
bombs a little later with "bus error" while awaiting input from the
keyboard for some user data.

I am able to debug normally if I don't try to catch exceptions.

Any ideas? Would I have better luck with the 2011 AdaCore version?

Jerry