Date: Fri, 11 Oct 2002 13:02:00 +0100 (BST) From: Sander Vesik <Sander.Vesik@Sun.COM> To: dev@porting.openoffice.org Cc: Alexander Kabaev <ak03@gte.com>, Martin Blapp <mb@imp.ch>, openoffice@freebsd.org, kan@freebsd.org Subject: Re: [porting-dev] FreeBSD: Uncatched exception problem Message-ID: <Pine.GSO.4.10.10210111234260.4795-100000@blossom> In-Reply-To: <200210102045.25098.kevin.hendricks@sympatico.ca>
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On Thu, 10 Oct 2002, Kevin B. Hendricks wrote:
> Hi,
>
> One thing the bridge code does a lot of is to use alloca for space in the
> current frame. This at one time in gcc 2.95.3 created problems for stack
> walkbacks on ppc linux.
>
> Perhaps we should change the test code to make sure the routine that does
> the catch uses alloca a number of times (and memset that space to 0) to
> make sure that growing the stack frame dynamically does not cause problems
> for the walkback.
>
Is it presently build with or without -fomit-frame-pointer ? If yes then
removing the option might improve the trackability of stack...
> So somewhere before the "try" in test2lib.cxx you might want to add the
> following lines:
>
> #include <alloca.h> // or whatever the right header is
>
> void* pSpace = NULL;
> int n = 20;
> for( int i = 0; i < n; i++ )
> {
> pSpace = alloca( n*(i+1) );
> memset( pSpace, 0, n*(i+1) );
> }
>
> To force that frame to grow to see if that has any impact on the walkback.
>
> Kevin
>
>
> On October 10, 2002 06:27, Alexander Kabaev wrote:
> > On Fri, 11 Oct 2002 00:25:06 +0200 (CEST)
> >
> > Martin Blapp <mb@imp.ch> wrote:
> > > Hi Kevin,
> > >
> > > > in do_it throwing 15
> > > > caught struct Exc&
> > >
> > > I get the same result :/
> > >
> > > Martin
> >
> > You should compile and link this sample using the same options OO uses
> > to compile its components. The simple case of exceptions being thrown
> > across shared libraries is working fine, I assure you.
>
>
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Sander
There are voices in the street,
And the sound of running feet,
And they whisper the word --
Revolution!
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