6 messages in com.xensource.lists.xen-develRe: [Xen-devel] anybody using pdb?
FromSent OnAttachments
Christian Limpach10 Mar 2004 16:09 
Keir Fraser11 Mar 2004 00:28 
Christian Limpach11 Mar 2004 09:21 
Keir Fraser11 Mar 2004 23:50 
Keir Fraser12 Mar 2004 03:52 
Christian Limpach12 Mar 2004 07:10 
Subject:Re: [Xen-devel] anybody using pdb?
From:Keir Fraser (Keir@cl.cam.ac.uk)
Date:03/11/2004 12:28:28 AM
List:com.xensource.lists.xen-devel

Hello!

I'd like to use pdb but it's not quite working as expected.

The 1st issue is that jumping to the debugger by pressing 'D' doesn't work because this leaves serial interrupts blocked. Maybe this is only the case because I'm using lo/hi muxing but my guess is that it's not. I've implemented a work around which seems to work: if pdb is entered by the keypressed handler it will call a new serial_getc function if there's no input in the rx ring. I'm not sure if this is also necessary when interacting with the debugger on a breakpoint or after a crash...

I've fixed this a better way, by enabling interrupts before calling the pdb handler. Let me know if it still doesn't work.

2nd issue is that the debugger doesn't work when hitting a breakpoint (and possibly after a crash) which raises my question if anybody is actually using the pdb code which is in unstable ;-)

I don't think PDB is entered on a crash -- it currently appears only to be hooked into the int3 and debug exception handlers.

-- Keir

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