Re: [cxx-abi-dev] gcc unwind ABI change for forced unwind

[Jason Merrill <jason@xxxxxxxxxx>]

On Wed, 21 May 2003 23:57:17 -0700 (PDT), Dennis Handly <dhandly@xxxxxxxxxx> wrote:

>>From: Cary Coutant <cary@xxxxxxxxxx>
>>Many of you are probably aware of (and several of you participated in) 
>>a discussion thread on the gcc-patches mailing list about a new unwind 
>>API that Richard Henderson had to add to support forced unwinds 
>>resulting from (among possibly other things) thread cancellation. I 
>>thought it would be appropriate to bring this issue to this mailing list.
>
> Jerry Harrow from the pre merger Compaq side of HP has some thoughts on
> this.  He said they did something like this and at the base of each thread
> was a "catch" block.
>
> And for every throw spec, it quantum tunneled through them.

Evidently Dave Butenhof did some related work at Compaq, and discusses it
in the message quoted here:

  http://sources.redhat.com/ml/libc-alpha/1999-08/msg00038.html

Jason