[Stackless] Debugging

Christian Tismer tismer at tismer.com
Sat Feb 22 22:14:12 CET 2003

Konrad Hinsen wrote:

> At first glance it looks as if everything was there. What I want to do is to 
> be able to inspect variables in tasklets that are blocked in channel 
> receives. It should be possible to get a reference to the stack frame just 
> before the tasklet goes to sleep by installing a channel callback. At the end 
> of a BSP superstep (one computation/communication cycle), a debugger would 
> then have access to all the stack frames of all (virtual) processes.

Well, if you know the channels where your tasklets block
upon, you can do it after the fact:
Walk the channel's queue attribute, which is a circular
list of all waiting tasklets chained together, through
a "next" and "prev" attribute.
Every tasklet has a frame atribute, where you can
get at the current frame at sleeping time.

ciao - chris
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