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From: Roland McGrath <roland@redhat.com>
To: Jim Blandy <jimb@red-bean.com>
Cc: Project Archer <archer@sourceware.org>
Subject: Re: feature idea: upto
In-Reply-To: Jim Blandy's message of  Thursday, 23 July 2009 00:00:37 -0700 <8f2776cb0907230000q1b8dc57chc417430fba0f570f@mail.gmail.com>
References: <20090702223351.64F00404FD@magilla.sf.frob.com>
	<8f2776cb0907230000q1b8dc57chc417430fba0f570f@mail.gmail.com>
Message-Id: <20090723181434.12C1580560@magilla.sf.frob.com>
Date: Thu, 23 Jul 2009 18:15:00 -0000
X-SW-Source: 2009-q3/txt/msg00047.txt.bz2

> For aborts and asserts, I don't think anyone would mind a
> default-to-on feature that simply *always* selects the stack frame of
> the function containing the abort or assert.  And even before a pony,
> I'd like to be able to add my own list of
> error-printing-functions-that-squawk-and-call-abort that should be
> unwound from.  .gdbinit already lists some of these.

Indeed, my ~/.gdbinit has:

	define catch crash
	catch throw
	b abort
	b __assert_fail
	b __assert_perror_fail
	end

But non-nesting "end" parsing means I can't write:

	define catch crash
	catch throw
	  comm
	  up
	  end
	b abort
	  comm
	  up
	  end
	b __assert_fail
	  comm
	  up
	  end
	b __assert_perror_fail
	  comm
	  up
	  end
	end

as I would like to.

In particular "catch throw" is comically no more useful than "b __cxa_throw"
and it would seem most natural for it to do something like the "up"
automagically.


Thanks,
Roland