>  
> David T. Lewis uploaded a new version of VMMaker to project VM Maker Inbox:
> http://source.squeak.org/VMMakerInbox/VMMaker.oscog-dtl.2968.mcz
>
> ==================== Summary ====================
>
> Name: VMMaker.oscog-dtl.2968
> Author: dtl
> Time: 13 June 2021, 6:26:53.146819 pm
> UUID: 603814ef-caa5-45c5-a0bd-896866381b01
> Ancestors: VMMaker.oscog-eem.2967, VMMaker.oscog-nice.2957
>
> Merge VMMaker.oscog-nice.2957 from inbox required for fix_include_order:
> https://github.com/OpenSmalltalk/opensmalltalk-vm/pull/562
>
> Fix from Alistair Grant for globalSessionID range overflow:
> https://github.com/pharo-project/opensmalltalk-vm/issues/233
> http://lists.squeakfoundation.org/pipermail/vm-dev/2021-May/036291.html
>
> =============== Diff against VMMaker.oscog-eem.2967 ===============
>
> Item was changed:
>   ----- Method: CCodeGenerator>>emitCHeaderOn: (in category 'C code generator') -----
>   emitCHeaderOn: aStream
>   "Emit the initial part of a source file on aStream, comprising the version stamp,
>   the global struct usage flags, the header files and preamble code."
>  
>   | headerClass |
>   headerClass := [vmClass coreInterpreterClass]
>   on: MessageNotUnderstood
>   do: [:ex| vmClass].
>   aStream nextPutAll: (self fileHeaderVersionStampForSourceClass: headerClass); cr; cr.
>   self emitGlobalStructFlagOn: aStream.
>  
>   (vmClass isNil or: [vmClass wantsSqDotH]) ifTrue:
>   [self addHeaderFileFirst: '"sq.h"'].
> + "Additional header files; use the prescribed order."
> + self emitHeaderFiles: headerFiles on: aStream.
> - "Additional header files; include C library ones first."
> - self emitHeaderFiles: (headerFiles select: [:hdr| hdr includes: $<]) on: aStream.
> - "Additional header files; include squeak VM ones last"
> - self emitHeaderFiles: (headerFiles reject: [:hdr| hdr includes: $<]) on: aStream.
>  
>   self maybePutPreambleFor: vmClass on: aStream.
>  
>   aStream cr!
>
> Item was changed:
>   ----- Method: Cogit class>>declareCVarsIn: (in category 'translation') -----
>   declareCVarsIn: aCCodeGenerator
>   | backEnd |
>   backEnd := CogCompilerClass basicNew.
>   #( 'coInterpreter' 'objectMemory' 'methodZone' 'objectRepresentation'
>   'cogBlockMethodSurrogateClass' 'cogMethodSurrogateClass' 'nsSendCacheSurrogateClass'
>   'threadManager' 'processor' 'lastNInstructions' 'simulatedAddresses'
>   'simulatedTrampolines' 'simulatedVariableGetters' 'simulatedVariableSetters'
>   'processorFrameValid' 'printRegisters' 'printInstructions' 'clickConfirm' 'singleStep') do:
>   [:simulationVariableNotNeededForRealVM|
>   aCCodeGenerator removeVariable: simulationVariableNotNeededForRealVM].
>   NewspeakVM ifFalse:
>   [#( 'selfSendTrampolines' 'dynamicSuperSendTrampolines'
>   'implicitReceiverSendTrampolines' 'outerSendTrampolines'
>   'ceEnclosingObjectTrampoline' 'numIRCs' 'indexOfIRC' 'theIRCs') do:
>   [:variableNotNeededInNormalVM|
>   aCCodeGenerator removeVariable: variableNotNeededInNormalVM]].
>   aCCodeGenerator removeConstant: #COGMTVM. "this should be defined at compile time"
>   "N.B. We *do not* include sq.h; it pulls in conflicting definitions now that sqVirtualMachine.h
>   declares cointerp's functions, and declares some of them inaccurately for histrical reasons.
>   We pull in CoInterpreter's api via cointerp.h which is accurate."
>   aCCodeGenerator
> + addHeaderFile:'"sqConfig.h"'; "config.h must be first on linux"
>   addHeaderFile:'<stddef.h>'; "for e.g. offsetof"
>   addHeaderFile:'<stdio.h>';
>   addHeaderFile:'<stdlib.h>';
>   addHeaderFile:'<string.h>';
> - addHeaderFile:'"sqConfig.h"';
>   addHeaderFile:'"sqPlatformSpecific.h"'; "e.g. solaris overrides things for sqCogStackAlignment.h"
>   addHeaderFile:'"sqMemoryAccess.h"';
>   addHeaderFile:'"sqCogStackAlignment.h"';
>   addHeaderFile:'"dispdbg.h"'; "must precede cointerp.h & cogit.h otherwise NoDbgRegParms gets screwed up"
>   addHeaderFile:'"cogmethod.h"'.
>   NewspeakVM ifTrue:
>   [aCCodeGenerator addHeaderFile:'"nssendcache.h"'].
>   aCCodeGenerator
>   addHeaderFile:'#if COGMTVM';
>   addHeaderFile:'"cointerpmt.h"';
>   addHeaderFile:'#else';
>   addHeaderFile:'"cointerp.h"';
>   addHeaderFile:'#endif';
>   addHeaderFile:'"cogit.h"'.
>   aCCodeGenerator
>   var: #ceGetFP
>   declareC: 'usqIntptr_t (*ceGetFP)(void)';
>   var: #ceGetSP
>   declareC: 'usqIntptr_t (*ceGetSP)(void)';
>   var: #ceCaptureCStackPointers
>   declareC: 'void (*ceCaptureCStackPointers)(void)';
>   var: #ceInvokeInterpret
>   declareC: 'void (*ceInvokeInterpret)(void)';
>   var: #ceEnterCogCodePopReceiverReg
>   declareC: 'void (*ceEnterCogCodePopReceiverReg)(void)';
>   var: #realCEEnterCogCodePopReceiverReg
>   declareC: 'void (*realCEEnterCogCodePopReceiverReg)(void)';
>   var: #ceCallCogCodePopReceiverReg
>   declareC: 'void (*ceCallCogCodePopReceiverReg)(void)';
>   var: #realCECallCogCodePopReceiverReg
>   declareC: 'void (*realCECallCogCodePopReceiverReg)(void)';
>   var: #ceCallCogCodePopReceiverAndClassRegs
>   declareC: 'void (*ceCallCogCodePopReceiverAndClassRegs)(void)';
>   var: #realCECallCogCodePopReceiverAndClassRegs
>   declareC: 'void (*realCECallCogCodePopReceiverAndClassRegs)(void)';
>   var: #postCompileHook
>   declareC: 'void (*postCompileHook)(CogMethod *)';
>   var: #openPICList declareC: 'CogMethod *openPICList = 0';
>   var: #maxMethodBefore type: #'CogBlockMethod *';
>   var: 'enumeratingCogMethod' type: #'CogMethod *'.
>  
>   aCCodeGenerator
>   var: #ceTryLockVMOwner
>   declareC: '#if COGMTVM\usqIntptr_t (*ceTryLockVMOwner)(usqIntptr_t)\#endif'.
>  
>   backEnd numICacheFlushOpcodes > 0 ifTrue:
>   [aCCodeGenerator
>   var: #ceFlushICache
>   declareC: 'static void (*ceFlushICache)(usqIntptr_t from, usqIntptr_t to)'].
>   aCCodeGenerator
>   var: #ceFlushDCache
>   declareC: '#if DUAL_MAPPED_CODE_ZONE\static void (*ceFlushDCache)(usqIntptr_t from, usqIntptr_t to)\#endif';
>   var: #codeToDataDelta
>   declareC: '#if DUAL_MAPPED_CODE_ZONE\static sqInt codeToDataDelta\#else\# define codeToDataDelta 0\#endif'.
>  
>   aCCodeGenerator
>   declareVar: 'aMethodLabel' type: #'AbstractInstruction'; "Has to come lexicographically before backEnd & methodLabel"
>   var: #backEnd declareC: 'AbstractInstruction * const backEnd = &aMethodLabel';
>   var: #methodLabel declareC: 'AbstractInstruction * const methodLabel = &aMethodLabel'.
>   self declareC: #(abstractOpcodes stackCheckLabel
>   blockEntryLabel blockEntryNoContextSwitch
>   stackOverflowCall sendMiss
>   entry noCheckEntry selfSendEntry dynSuperEntry
>   fullBlockNoContextSwitchEntry fullBlockEntry
>   picMNUAbort picInterpretAbort  endCPICCase0 endCPICCase1 cPICEndOfCodeLabel)
>   as: #'AbstractInstruction *'
>   in: aCCodeGenerator.
>   aCCodeGenerator
>   declareVar: #cPICPrototype type: #'CogMethod *';
>   declareVar: #blockStarts type: #'BlockStart *';
>   declareVar: #fixups type: #'BytecodeFixup *';
>   declareVar: #methodZoneBase type: #usqInt.
>   aCCodeGenerator
>   var: #ordinarySendTrampolines
>   declareC: 'sqInt ordinarySendTrampolines[NumSendTrampolines]';
>   var: #superSendTrampolines
>   declareC: 'sqInt superSendTrampolines[NumSendTrampolines]'.
>   BytecodeSetHasDirectedSuperSend ifTrue:
>   [aCCodeGenerator
>   var: #directedSuperSendTrampolines
>   declareC: 'sqInt directedSuperSendTrampolines[NumSendTrampolines]';
>   var: #directedSuperBindingSendTrampolines
>   declareC: 'sqInt directedSuperBindingSendTrampolines[NumSendTrampolines]'].
>   NewspeakVM ifTrue:
>   [aCCodeGenerator
>   var: #selfSendTrampolines
>   declareC: 'sqInt selfSendTrampolines[NumSendTrampolines]';
>   var: #dynamicSuperSendTrampolines
>   declareC: 'sqInt dynamicSuperSendTrampolines[NumSendTrampolines]';
>   var: #implicitReceiverSendTrampolines
>   declareC: 'sqInt implicitReceiverSendTrampolines[NumSendTrampolines]';
>   var: #outerSendTrampolines
>   declareC: 'sqInt outerSendTrampolines[NumSendTrampolines]'].
>   aCCodeGenerator
>   addConstantForBinding: self bindingForNumTrampolines;
>   var: #trampolineAddresses
>   declareC: 'static char *trampolineAddresses[NumTrampolines*2]';
>   var: #objectReferencesInRuntime
>   declareC: 'static usqInt objectReferencesInRuntime[NumObjRefsInRuntime+1]';
>   var: #labelCounter
>   type: #int;
>   var: #traceFlags
>   declareC: 'int traceFlags = 8 /* prim trace log on by default */';
>   var: #cStackAlignment
>   declareC: 'const int cStackAlignment = STACK_ALIGN_BYTES'.
>   aCCodeGenerator
>   declareVar: #minValidCallAddress type: #'usqIntptr_t'.
>   aCCodeGenerator vmClass generatorTable ifNotNil:
>   [:bytecodeGenTable|
>   aCCodeGenerator
>   var: #generatorTable
>   declareC: 'static BytecodeDescriptor generatorTable[', bytecodeGenTable size printString, ']',
>   (self tableInitializerFor: bytecodeGenTable
>   in: aCCodeGenerator)].
>   "In C the abstract opcode names clash with the Smalltalk generator syntactic sugar.
>   Most of the syntactic sugar is inlined, but alas some remains.  Rename the syntactic
>   sugar to avoid the clash."
>   (self organization listAtCategoryNamed: #'abstract instructions') do:
>   [:s|
>   aCCodeGenerator addSelectorTranslation: s to: 'g', (aCCodeGenerator cFunctionNameFor: s)].
>   aCCodeGenerator addSelectorTranslation: #halt: to: 'haltmsg'.
>   self declareFlagVarsAsByteIn: aCCodeGenerator!
>
> Item was changed:
>   ----- Method: StackInterpreter>>initializeInterpreter: (in category 'initialization') -----
>   initializeInterpreter: bytesToShift
>   "Initialize Interpreter state before starting execution of a new image."
>   interpreterProxy := self sqGetInterpreterProxy.
>   self dummyReferToProxy.
>   objectMemory initializeObjectMemory: bytesToShift.
>   self checkAssumedCompactClasses.
>   self initializeExtraClassInstVarIndices.
>   method := newMethod := objectMemory nilObject.
>   self cCode: '' inSmalltalk:
>   [breakSelectorLength ifNil:
>   [breakSelectorLength := objectMemory minSmallInteger].
>   breakLookupClassTag ifNil: [breakLookupClassTag := -1].
>   reenterInterpreter := ReenterInterpreter new].
>   methodDictLinearSearchLimit := 8.
>   self initialCleanup.
>   LowcodeVM ifTrue: [ self setupNativeStack ].
>   profileSemaphore := profileProcess := profileMethod := objectMemory nilObject.
>   interruptKeycode := 2094. "cmd-. as used for Mac but no other OS"
>   [globalSessionID = 0] whileTrue:
>   [globalSessionID := self
> + cCode: [((self time: #NULL) + self ioMSecs) bitAnd: 16r7FFFFFFF]
> + inSmalltalk: [(Random new next * (SmallInteger maxVal min: 16r7FFFFFFF)) asInteger]].
> - cCode: [(self time: #NULL) + self ioMSecs]
> - inSmalltalk: [(Random new next * (SmallInteger maxVal min: 16rFFFFFFFF)) asInteger]].
>   metaAccessorDepth := -2.
>   super initializeInterpreter: bytesToShift!
>