BC + call/cc
Avi Bryant
squeak-dev at lists.squeakfoundation.org
Sun Oct 27 23:51:48 UTC 2002
> Attached is a Continuation changeset for VI4. It works, accept if you
> write to the Transcript it crashes the VM. I will try to fix this
> tomorrow.
>
> Cheers,
> Anthony
Anthony,
Cool, thanks for helping with this. Note that I get a segfault if I try
to resume a continuation with a SmallInteger parameter.
I tried filing in your Continuation class and running Seaside, but I
quickly got the appened walkback (in a flashing notifier as if they were
being continuously generated, with no response from the UI).
Unfortunately the #forkAndWait makes it hard for me to isolate where in my
code this is happening. Does the walkback tell you anything by itself?
MethodContext2 errorCannotCopyContext?
27 October 2002 4:48:33 pm
VM: unix - Squeak3.2 of 11 July 2002[VI4] [latest update: #4956]
Image: Squeak3.2[VI4] [latest update: #4956]
39 MessageNotUnderstood(Exception)>>signal
Receiver: MethodContext2 errorCannotCopyContext?
Arguments and temporary variables:
Receiver's instance variables:
messageText: nil
initialContext: 39
MessageNotUnderstood(Exception)>>signal
handlerContext: 39
MessageNotUnderstood(Exception)>>signal
message: errorCannotCopyContext
receiver: 145 Error(Exception)>>executeNextHandler
36 MethodContext2(Object)>>doesNotUnderstand: errorCannotCopyContext
Receiver: 145 Error(Exception)>>executeNextHandler
Arguments and temporary variables:
aMessage: errorCannotCopyContext
Receiver's instance variables:
thread: a SuspendedProcess in 188
BlockClosure>>forkAndWait
fpCode: -536870622
method: a CompiledMethod2 (2883)
prevActiveContext: 142 Error(Exception)>>signal
contextTag: nil
32 MethodContext2>>privForNewThread:
Receiver: 145 Error(Exception)>>executeNextHandler
Arguments and temporary variables:
process: a SuspendedProcess in 188
BlockClosure>>forkAndWait
Receiver's instance variables:
thread: a SuspendedProcess in 188
BlockClosure>>forkAndWait
fpCode: -536870622
method: a CompiledMethod2 (2883)
prevActiveContext: 142 Error(Exception)>>signal
contextTag: nil
28 MethodContext2>>privForNewThread:
Receiver: 172 WASession>>respond:withReturnValue:
Arguments and temporary variables:
process: a SuspendedProcess in 188
BlockClosure>>forkAndWait
Receiver's instance variables:
thread: a SuspendedProcess in 188
BlockClosure>>forkAndWait
fpCode: 344
method: a CompiledMethod2 (1368)
prevActiveContext: 145
Error(Exception)>>executeNextHandler
contextTag: a ContextTag
--- The rest of the stack ---
24 MethodContext2>>privForNewThread:
20 SuspendedProcess>>postCopy
17 SuspendedProcess>>copy
14 []
11 BlockClosure>>ensure:
7 []
4 []
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