or (in a debugger on the VM) set a breakpoint when the interpreter reaches the send instruction and simply increment the instruction pointer. If the halt is only reached once this will work well. On Thu, Sep 8, 2011 at 2:44 PM, Sean P. DeNigris <sean@clipperadams.com>wrote:

Mariano Martinez Peck wrote:

...

maybe sending a .st to the vm when starting

Yeah, I had the same thought, but the .st doesn't get processed before the image crashes. Maybe I can build a debug VM and make perform:with: a no-op...

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-- best, Eliot

Hmm... I guessed at random until setting "ignore 3 times before stopping" stopped the image from crashing... yay! Except then my whole computer was hijacked by the image. Everything was running in the background e.g. iTunes was playing and I could play/pause. I wonder if it has to do with the image running in fullscreen? Anyway, I already had to hard reset twice, so I'm reluctant to experiment further in that direction. Anyway, I guess now it would be *really* great to know the name of the receiver so that I can put a conditional in the method, since the breakpoint was a no-go... Sean -- View this message in context: http://forum.world.st/Oops-I-put-a-halt-in-a-startup-method-tp3800163p380040... Sent from the Pharo Smalltalk mailing list archive at Nabble.com.

I'm impressed and I should do the same than you. Jumping into fire. Stef On Sep 10, 2011, at 12:20 AM, Sean P. DeNigris wrote:

Huge thanks to Igor and Mariano. I recovered the image. Just in case anyone ever has a similar problem, the solution was:

1. Test for selector in CoInterpreter>>commonSend ... (messageSelector = #halt) ifFalse: [ "the conditional was added" self internalFindNewMethod. self internalExecuteNewMethod ].

self fetchNextBytecode.

2. Manually edit the condition in gcc3x-cointerp.c: char* realSelector = GIV(messageSelector) + BaseHeaderSize; if (strncmp(realSelector, "halt", 4) == 0) puts("Skipping halt..."); else { ...

Although I lost the better part of a day, it's a very powerful feeling to start building basic VM skills and know that errors that used to be magical and fatal can now be resolved...

Cheers, Sean

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Hi Sean--

...it's a very powerful feeling to start building basic VM skills and know that errors that used to be magical and fatal can now be resolved...

Yay! Also note that you can make object memory snapshots at any point from either the VM simulator or gdb... -C -- Craig Latta www.netjam.org/resume +31 6 2757 7177 + 1 415 287 3547