<br><br><div class="gmail_quote">On Wed, Oct 13, 2010 at 5:11 PM, Mariano Martinez Peck <span dir="ltr"><<a href="mailto:marianopeck@gmail.com">marianopeck@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
Hi. Sorry if the question is newbie. I am still reading the blue book, so in case this is explained there I would just appreciate a link to it. <br><br>The problem is the following: I have implemented some functionality in Interpreter to trace objects usage. I have modified all bytecodes and different primitives and now I am almost sure I am covering all the "methods sends". Now, I have a problem with bitOr: and bitAnd: for example.<br>
<br>If I do 9999999999999999 bitOr: 8888888888888888888<br>I would like to trace both intances of LargePositiveInteger as used. <br><br>LargePositiveInteger >> bitOr: <br>bitOr: anInteger <br> "Primitive. Answer an Integer whose bits are the logical OR of the<br>
receiver's bits and those of the argument. Fail if the receiver or argument<br> is greater than 32 bits. See Object documentation whatIsAPrimitive."<br> <primitive: 15><br> ^ super bitOr: anInteger<br>
<br>So...clearly, this will fail since both obects are more than 32 bits. So....we will do ^ super bitOr: anInteger<br><br>bitOr: n <br> "Answer an Integer whose bits are the logical OR of the receiver's bits <br>
and those of the argument, n."<br> | norm |<br> <primitive: 'primDigitBitOr' module:'LargeIntegers'><br> norm := n normalize.<br> ^ self<br> digitLogic: norm<br> op: #bitOr:<br>
length: (self digitLength max: norm digitLength)<br><br><br>So...it will call the primDigitBitOr in the plugin LargeIntegers<br><br>In Interpreter I put an instVar for example to flag if I need to trace or not, and several helpers and primitives methods. The "main" method is:<br>
<br>Interpreter >> traceObjectUsage: rcvr<br> ((self isIntegerObject: rcvr) not and: [hasToTrace])<br> ifTrue: [ <br> self internalTurnOnUsedBit: rcvr.<br> ]<br><br><br>Now, the problem is, how can I trace that 8888888888888888888 was used??? 9999999999999999 is used, because at least one it goes trough the #normalSend <br>
<br>Two options:<br><br>1) In the fail of Interprter >> primitiveBitOr: I check if the class is LargePositiveInteger, I mark it. I don't like this solution because actually I "think" it will be used, but this is just because of the implemetnation on bitOr: in the image. Maybe it changes, I don't know.<br>
<br>2) Ttry to trace this in the LargeInteger plugin. I would like this idea, but I found several problems:<br><br>2.a) It is ok that I cannot access/send messages to Interpreter from plugins? It seems I am only allowed to do to InterpreterPlugin. But, I don't want to duplicate all my code from Interpreter to InterpreterProxy.<br>
2.b) So my idea was to do something like this:<br><br>InterpreterProxy >> traceObjectUsage: anObject<br>anObject markAsUsed<br><br></blockquote><div><br>Maybe this is not possible. But even with this:<br><br>traceObjectUsage: rcvr<br>
"rcvr markAsUsed "<br> <br><br>I have the bad access :(<br><br><br> </div><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">And Object >> markAsUsed will just be a primitive that actually calls #traceObjectUsage<br>
<br>Trying to do that, I failed because sqVirtualMachine.h was not generated automatically, thus such struct didn't understand traceObjectUsage. For that, I added by hand to sqVirtualMachine.h something like this:<br>
<br><br>#if VM_PROXY_MINOR > 8<br> sqInt (*traceObjectUsage)(sqInt oop);<br>#endif<br><br>With this it compiles, but when trying to run (actually in the start) the image I get a bad access error.<br><br>2.c) why is not sqVirtualMemory, or let's say, InterpreterProxy methods not automatically generated with VMMaker? I am doing something wrong ?<br>
<br>2.d) I saw there are more than one sqVirtualMemory. One in "/platforms/Cross/vm" and another one in "/platforms/Cross/plugins/IA32ABI/sqVirtualMachine.h" . After testin a little, it seems in my case it is using the second one. Why we have 2? and why it is using the second one ?<br>
<br><br>Ok, thanks for any help you can give me and sorry for so many (and probably newbie) questions. <br><br>Best regards,<br><font color="#888888"><br>mariano<br><br><br><br>
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