<div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Nov 17, 2014 at 6:24 AM, Guillermo Polito <span dir="ltr"><<a href="mailto:guillermopolito@gmail.com" target="_blank">guillermopolito@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"> <br><div dir="ltr">Hi Eliot, guys,<div><br></div><div>Does anybody know what is the right way to initialize the simulator when I have no image (yet) ? That means: I have no contexts, no processes, no special objects array, no nil. Nothing :).</div></div></blockquote><div><br></div><div>StackInterpreterSimulator newWithOptions: anArray</div><div>CogVMSimulator newWithOptions: anArray</div><div><br></div><div>The arguments of the array are symbol,value pairs that define the options, e.g.</div><div><br></div><div>StackInterpreterSimulator newWithOptions: #(ObjectMemory Spur32BitMemoryManager</div><div><span class="" style="white-space:pre"> </span>NewspeakVM true MULTIPLEBYTECODESETS true).</div><div><br></div><div>The key,value pairs are</div><div><br></div><div>ObjectMemory<span style="white-space:pre"> </span><span style="white-space:pre"> </span><span style="white-space:pre"> </span><span style="white-space:pre"> </span><span style="white-space:pre">New</span>ObjectMemory (default) <span style="white-space:pre">NewCo</span>ObjectMemory Spur32BitMemoryManager Spur32BitCoMemoryManager</div><span style="white-space:pre"><div class="gmail_quote"><span style="white-space:pre"><br></span></div><div class="gmail_quote"><span style="white-space:normal">NewspeakVM</span> false (default)<span style="white-space:normal"><br class="">SistaVM</span> false (default)</div></span>MULTIPLEBYTECODESETS<span style="white-space:pre"> false (default)</span><span style="white-space:pre"><div class="gmail_quote">bytecodeTableInitializer initializeBytecodeTableForSqueakV3PlusClosures et al<span style="white-space:pre"><br></span></div></span></div><div class="gmail_quote"><span style="white-space:pre"><br></span><div>Cogit<span style="white-space:pre"> </span><span style="white-space:pre"> </span><span style="white-space:pre"> </span><span style="white-space:pre"> </span><span style="white-space:pre"> Simple</span>StackBasedCogit (default) StackToRegisterMappingCogit (production version) SistaStackToRegisterMappingCogit</div><div>MaxLiteralCountForCompile<span style="white-space:pre"> 60 (default)</span><br></div><div>COGMTVM<span style="white-space:pre"> </span><span style="white-space:pre"> </span><span style="white-space:pre"> </span><span style="white-space:pre"> false (default) true</span></div>ISA<span style="white-space:pre"> </span><span style="white-space:pre"> </span><span style="white-space:pre"> </span><span style="white-space:pre"> </span><span style="white-space:pre"> </span><span style="white-space:pre"> </span><span style="white-space:pre">IA32 (default) ARMv5 etc</span></div><div class="gmail_quote"><div><span style="white-space:pre">EagerInstructionDecoration</span><span style="white-space:pre"> false (true) true</span><br></div><div><span style="white-space:pre"><br></span></div><div>Choosing these values merey gives you a simulator with the right classes and basic values. As you note below it doesn't initialize a heap.</div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr"><div>I want to create an empty simulator that I will fill with objects later, with bootstrapping purposes. And I know Eliot is doing something like that to initialize the Spur bootstrap.<br></div></div></blockquote><div><br></div><div>No, I don't. I start with an image and transform it. But see below.</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr"><div></div><div><br></div><div>I tried to get that working by myself, but when I updated to the latest VM code everything went bananas. My code was something like:</div><div><br></div><div><div><span style="white-space:pre-wrap"> </span>simulator := StackInterpreterSimulator new.<span style="white-space:pre-wrap"> </span></div><div><span style="white-space:pre-wrap"> </span>simulator objectMemory setEndOfMemory: 0.</div><div><span style="white-space:pre-wrap"> </span>simulator objectMemory edenBytes: simulator objectMemory defaultEdenBytes.</div><div><span style="white-space:pre-wrap"> </span>simulator objectMemory specialObjectsOop: 0. "We don't have one yet"</div><div><span style="white-space:pre-wrap"> </span>simulator objectMemory allocateMemoryOfSize: 25000000. "Extra bytes"</div><div><span style="white-space:pre-wrap"> </span>simulator objectMemory initialize.<span style="white-space:pre-wrap"> </span></div><div><span style="white-space:pre-wrap"> </span>simulator initializeOzInterpreter: 0. "its initializeInterpreter: but a bit tweeked"</div></div><div><br></div><div>But it stops in an assert because firstFree = end of memory... Which is wrong as we have an empty memory :D. And i'm a bit lost in this one...</div></div></blockquote><div><br></div><div>Yes. You need to start by looking at the implementations of openOn:extraMemory: and see how the object memory is initalized. You'll probably want to create your own method, e.g. initializeHeapOfSize:. The key message is</div><div><br></div><div><div><span class="" style="white-space:pre"> </span>objectMemory<br></div><div><span class="" style="white-space:pre"> </span>setHeapBase: heapBase</div><div><span class="" style="white-space:pre"> </span>memoryLimit: heapBase + heapSize</div><div><span class="" style="white-space:pre"> </span>endOfMemory: heapBase + dataSize. "bogus for Spur"</div></div><div><br></div><div>As you know, it's a really useful thing to do, but the thing to remember is that IFAIA no one has done this before. Don't expect it to just work. But I'm here to answer any questions I can. Good luck!!</div><div><br></div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr"><div>I was looking at how the Spur bootstrap was doing it</div><div><br></div><div><div>on: imageName</div><div><span style="white-space:pre-wrap"> </span>StackInterpreter initializeWithOptions: Dictionary new.</div><div><span style="white-space:pre-wrap"> </span>(oldInterpreter := StackInterpreterSimulator new)</div><div><span style="white-space:pre-wrap"> </span>openOn: imageName extraMemory: 0;</div><div><span style="white-space:pre-wrap"> </span>assertValidExecutionPointersAtEachStep: false.</div><div><span style="white-space:pre-wrap"> </span>oldHeap := oldInterpreter objectMemory.</div><div><span style="white-space:pre-wrap"> </span>newHeap := Spur32BitMMLESimulator new.</div><div><span style="white-space:pre-wrap"> </span>newHeap</div><div><span style="white-space:pre-wrap"> </span>allocateMemoryOfSize: (oldHeap youngStart * 3 / 2 roundUpTo: 1024 * 1024)</div><div><span style="white-space:pre-wrap"> </span>newSpaceSize: 2 * 1024 * 1024</div><div><span style="white-space:pre-wrap"> </span>stackSize: 1024 * 1024</div><div><span style="white-space:pre-wrap"> </span>codeSize: 0.</div><div><span style="white-space:pre-wrap"> </span>newHeap setCheckForLeaks: 15 - 6. "don't check become; or newSpace; soooo many rehashes in bootstrap"</div><div><span style="white-space:pre-wrap"> </span>newHeap bootstrapping: true.</div><div><span style="white-space:pre-wrap"> </span>self initMaps</div></div><div><br></div><div>But well, the NewObjectMemory does not have the same API as SpurMemoryManager.</div><div><br></div><div>I'd appreciate any hints on it!</div><div>Thanks and cheers,</div><div>Guille</div></div></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature">best,<div>Eliot</div></div>
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