VM-beginners October 2011

vm-beginners@lists.squeakfoundation.org

2 participants
2 discussions

Fwd: Oops - I put a halt in a startup method
by Sean P. DeNigris 10 Jan '12

10 Jan '12

From http://forum.world.st/Oops-I-put-a-halt-in-a-startup-method-td3800163.html : My image appears for an instant and then crashes. Is there any way to recover from this? I made some progress, but I'm not sure I'm on the right track... I built a debug VM and found primitivePerform, which is apparently called by the following: FeaturesDB perform: #startUp: with: resuming How will I know which call to skip/break on? Maybe there is there a way, from the VM side, to get the receiver class name as a string? If I knew that the receiver was FeaturesDB, that would be the one... And then once I have the right call, can I just skip over it? Sean -- View this message in context: http://forum.world.st/Fwd-Oops-I-put-a-halt-in-a-startup-method-tp3800729p3… Sent from the Smalltalk VM - Beginners mailing list archive at Nabble.com.

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Got "Error: basicNew: failed" when running InterpreterSimulator
by Nick. 21 Dec '11

21 Dec '11

Hi guys! In the past few days i tried to get InterpreterSimulator running without success. First of all, a little context about my goal: I'm digging into the VM because i would like to be able to delegate to some class (that I'll develop) the responsibility for, say, the method lookup algorithm. With that in mind, here's what i've been doing: Using the Pharo 1.2 image Mariano Peck's prepared in his exellent article (http://marianopeck.wordpress.com/2011/04/23/how-to-debug-the-vm/), loaded the VMMaker package with the following script: Deprecation raiseWarning: false. Gofer new squeaksource: 'MetacelloRepository'; package: 'ConfigurationOfCog'; load. (Smalltalk at: #ConfigurationOfCog) project latestVersion load. Once it finishes (without errors) I "Save As" the current image as "demo.image", close it and open the original Pharo 1.2 image that Mariano provided. When, for example, I run: (CogVMSimulator new openOn: 'demo.image') test or (InterpreterSimulatorLSB new openOn: 'demo.image') test I get the following error: "Error: basicNew: failed" (see attached images at the end). When I tried to load VMMaker in the Pharo 1.3 OneClick release, I got another error (see attached images at the end). Am I doing something wrong? Are those the right simulators to use? I can tell the difference between all that are available in VMMaker package. Thanks in advance! Nick http://forum.world.st/file/n3835723/error_while_trying_to_run_InterpreterSi… http://forum.world.st/file/n3835723/Error_while_loading_VMMaker_in_Pharo-1.… -- View this message in context: http://forum.world.st/Got-Error-basicNew-failed-when-running-InterpreterSim… Sent from the Smalltalk VM - Beginners mailing list archive at Nabble.com.

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VM-beginners October 2011