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CogVMSimulator.class.st
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CogVMSimulator.class.st
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"
This class defines basic memory access and primitive simulation so that the CoInterpreter can run simulated in the Squeak environment. It also defines a number of handy object viewing methods to facilitate pawing around in the object memory. Remember that you can test the Cogit using its class-side in-image compilation facilities.
To see the thing actually run, you could (after backing up this image and changes), execute
(CogVMSimulator new openOn: Smalltalk imageName) test
and be patient both to wait for things to happen, and to accept various things that may go wrong depending on how large or unusual your image may be. We usually do this with a small and simple benchmark image.
Here's an example to launch the simulator in a window. The bottom-right window has a menu packed with useful stuff:
(CogVMSimulator newWithOptions: #(Cogit StackToRegisterMappingCogit))
desiredNumStackPages: 8;
openOn: '/Users/eliot/Cog/startreader.image';
openAsMorph;
run
Here's a hairier example that I (Eliot) actually use in daily development with some of the breakpoint facilities commented out.
| cos proc opts |
CoInterpreter initializeWithOptions: (opts := Dictionary newFromPairs: #(Cogit StackToRegisterMappingCogit)).
CogVMSimulator chooseAndInitCogitClassWithOpts: opts.
cos := CogVMSimulator new.
""cos initializeThreadSupport."" ""to test the multi-threaded VM""
cos desiredNumStackPages: 8. ""to set the size of the stack zone""
""cos desiredCogCodeSize: 8 * 1024 * 1024."" ""to set the size of the Cogit's code zone""
cos openOn: '/Users/eliot/Squeak/Squeak4.4/trunk44.image'. ""choose your favourite image""
""cos setBreakSelector: 'r:degrees:'."" ""set a breakpoint at a specific selector""
proc := cos cogit processor.
""cos cogit sendTrace: 7."" ""turn on tracing""
""set a complex breakpoint at a specific point in machine code""
""cos cogit singleStep: true; breakPC: 16r56af; breakBlock: [:cg| cos framePointer > 16r101F3C and: [(cos longAt: cos framePointer - 4) = 16r2479A and: [(cos longAt: 16r101F30) = (cos longAt: 16r101F3C) or: [(cos longAt: 16r101F2C) = (cos longAt: 16r101F3C)]]]]; sendTrace: 1"".
""[cos cogit compilationTrace: -1] on: MessageNotUnderstood do: [:ex|]."" ""turn on compilation tracing in the StackToRegisterMappingCogit""
""cos cogit setBreakMethod: 16rB38880.""
cos
openAsMorph;
""toggleTranscript;"" ""toggleTranscript will send output to the Transcript instead of the morph's rather small window""
halt;
run
"
Class {
#name : #CogVMSimulator,
#superclass : #CoInterpreterPrimitives,
#traits : 'TVMSimulator',
#classTraits : 'TVMSimulator classTrait',
#instVars : [
'parent',
'enableCog',
'byteCount',
'lastPollCount',
'lastExtPC',
'sendCount',
'lookupCount',
'printSends',
'traceOn',
'myBitBlt',
'imageName',
'pluginList',
'mappedPluginEntries',
'quitBlock',
'transcript',
'eventTransformer',
'printFrameAtEachStep',
'printBytecodeAtEachStep',
'systemAttributes',
'uniqueIndices',
'uniqueIndex',
'breakCount',
'atEachStepBlock',
'startMicroseconds',
'lastYieldMicroseconds',
'externalSemaphoreSignalRequests',
'externalSemaphoreSignalResponses',
'extSemTabSize',
'debugStackDepthDictionary',
'performFilters',
'eventQueue',
'expectedSends',
'expecting',
'bootstrapping',
'primitiveFailCount',
'primitiveFlags',
'initialAddress',
'rumpCStackBase'
],
#classVars : [
'ByteCountsPerMicrosecond',
'ExpectedSends'
],
#category : #'VMMaker-JITSimulation'
}
{ #category : #'debug support' }
CogVMSimulator class >> expectedSends [
^ExpectedSends
]
{ #category : #initialization }
CogVMSimulator class >> initializeWithOptions: optionsDictionary [
super initializeWithOptions: optionsDictionary.
ByteCountsPerMicrosecond := InitializationOptions
at: #ByteCountsPerMicrosecond
ifAbsent: [100]
]
{ #category : #'class initialization' }
CogVMSimulator class >> initializeWithOptions: optionsDictionaryOrArray objectMemoryClass: objectMemoryClassOrNil [
"The relevant ObjectMemory, Interpreter and Cogit classes must be initialized in order.
This happens notionally every time we start the simulator,
but in fact happens when ever we instantiate a simulator."
InitializationOptions := optionsDictionaryOrArray isArray
ifTrue: [Dictionary newFromPairs: optionsDictionaryOrArray]
ifFalse: [optionsDictionaryOrArray].
(objectMemoryClassOrNil ifNil: [self objectMemoryClass])
initializeWithOptions: InitializationOptions.
self initializeWithOptions: InitializationOptions.
(self cogitClass withAllSuperclasses copyUpTo: Cogit) reverseDo:
[:c| c initializeWithOptions: InitializationOptions]
]
{ #category : #'instance creation' }
CogVMSimulator class >> new [
^self onObjectMemory: nil cogit: nil options: #()
]
{ #category : #'instance creation' }
CogVMSimulator class >> newWithOptions: optionsDictionaryOrArray [
^self onObjectMemory: nil cogit: nil options: optionsDictionaryOrArray
]
{ #category : #'instance creation' }
CogVMSimulator class >> onObjectMemory: anObjectMemory [
^self onObjectMemory: anObjectMemory cogit: nil options: #()
]
{ #category : #'instance creation' }
CogVMSimulator class >> onObjectMemory: anObjectMemory cogit: aCogit [
^self onObjectMemory: anObjectMemory cogit: aCogit options: #()
]
{ #category : #'instance creation' }
CogVMSimulator class >> onObjectMemory: anObjectMemory cogit: aCogit options: optionsDictionaryOrArray [
| simulatorClass |
^self == CogVMSimulator
ifTrue:
[simulatorClass := SmalltalkImage current endianness == #big
ifTrue: [self notYetImplemented]
ifFalse: [CogVMSimulatorLSB].
simulatorClass
initializeWithOptions: optionsDictionaryOrArray
objectMemoryClass: (anObjectMemory ifNotNil: [anObjectMemory class]).
simulatorClass
onObjectMemory: (anObjectMemory ifNil:
[self objectMemoryClass simulatorClass new])
cogit: aCogit
options: optionsDictionaryOrArray]
ifFalse:
[| sim |
sim := self basicNew.
sim objectMemory: anObjectMemory.
sim cogit: aCogit.
sim initialize.
sim]
]
{ #category : #'debug support' }
CogVMSimulator >> allObjectsSelect: objBlock [
"self allObjectsSelect: [:oop | (self baseHeader: oop) = 1234]"
| selected |
selected := OrderedCollection new.
objectMemory allObjectsDo:
[:oop| (objBlock value: oop) ifTrue: [selected addLast: oop]].
^ selected
]
{ #category : #accessing }
CogVMSimulator >> atEachStepBlock [
^atEachStepBlock
]
{ #category : #accessing }
CogVMSimulator >> atEachStepBlock: aBlock [
atEachStepBlock := aBlock
]
{ #category : #initialization }
CogVMSimulator >> basicInitialize [
"Initialize the CogVMSimulator when running the interpreter inside Smalltalk. The
primary responsibility of this method is to allocate Smalltalk Arrays for variables
that will be declared as statically-allocated global arrays in the translated code."
super initialize.
transcript := Transcript.
bootstrapping := false.
objectMemory ifNil:
[objectMemory := self class objectMemoryClass simulatorClass new].
cogit ifNil:
[cogit := self class cogitClass new setInterpreter: self].
objectMemory coInterpreter: self cogit: cogit.
(cogit numRegArgs > 0
and: [VMClass initializationOptions at: #CheckStackDepth ifAbsent: [true]]) ifTrue:
[debugStackDepthDictionary := Dictionary new].
self assert: ConstMinusOne = (objectMemory integerObjectOf: -1).
cogMethodZone := cogit methodZone. "Because Slang can't remove intermediate implicit receivers (cogit methodZone foo doesn't reduce to foo())"
enableCog := true.
methodCache := Array new: MethodCacheSize.
atCache := nil.
self flushMethodCache.
cogCompiledCodeCompactionCalledFor := false.
gcSemaphoreIndex := 0.
externalSemaphoreSignalRequests := externalSemaphoreSignalResponses := #().
externalPrimitiveTable := CArrayAccessor on: (Array
new: MaxExternalPrimitiveTableSize
withAll: 0).
externalPrimitiveTableFirstFreeIndex := 0.
primitiveTable := self class primitiveTable copy.
desiredNumStackPages := desiredEdenBytes := desiredCogCodeSize := 0.
"This is initialized on loading the image, but convenient for testing stack page values..."
numStackPages := self defaultNumStackPages.
startMicroseconds := lastYieldMicroseconds := self ioUTCStartMicroseconds.
maxLiteralCountForCompile := MaxLiteralCountForCompile.
minBackwardJumpCountForCompile := MinBackwardJumpCountForCompile.
flagInterpretedMethods := false.
"initialize InterpreterSimulator variables used for debugging"
byteCount := lastPollCount := sendCount := lookupCount := 0.
quitBlock := [^self close].
traceOn := true.
printSends := printFrameAtEachStep := printBytecodeAtEachStep := false.
myBitBlt := BitBltSimulator new setInterpreter: self.
eventQueue := SharedQueue new.
suppressHeartbeatFlag := deferSmash := deferredSmash := false.
systemAttributes := Dictionary new.
primTraceLog := CArrayAccessor on: (Array new: 256 withAll: 0).
primTraceLogIndex := 0.
traceLog := CArrayAccessor on: (Array new: TraceBufferSize withAll: 0).
traceLogIndex := 0.
traceSources := TraceSources.
statCodeCompactionCount := 0.
statCodeCompactionUsecs := 0.
extSemTabSize := 256.
"This will be overriden when calling initializePluginEntries"
mappedPluginEntries := OrderedCollection new.
imageReader := self class imageReaderClass newWithMemory: objectMemory andInterpreter: self.
imageWriter := self class imageWriterClass newWithMemory: objectMemory andInterpreter: self
]
{ #category : #hooks }
CogVMSimulator >> beforeCodeZoneInitialization [
super beforeCodeZoneInitialization.
self moveMethodCacheToMemoryAt: (memoryManager allocate: MethodCacheEntrySize * MethodCacheSize * (self sizeof: #sqInt)).
self movePrimTraceLogToMemoryAt: (memoryManager allocate: PrimTraceLogSize * (self sizeof: #sqInt)).
]
{ #category : #accessing }
CogVMSimulator >> bootstrapping: aBoolean [
bootstrapping := aBoolean.
objectMemory ifNotNil:
[objectMemory bootstrapping: aBoolean]
]
{ #category : #accessing }
CogVMSimulator >> breakCount [
^breakCount
]
{ #category : #'memory access' }
CogVMSimulator >> byteAt: byteAddress [
"This is really only for the C library simulations memcpy:_:_: et al in VMClass.
Use objectMemory byteAt: directly where possible."
^objectMemory byteAt: byteAddress
]
{ #category : #'memory access' }
CogVMSimulator >> byteAt: byteAddress put: byte [
^objectMemory byteAt: byteAddress put: byte
]
{ #category : #'debug support' }
CogVMSimulator >> byteCount [
"So you can call this from temp debug statements in, eg, Interpreter, such as
self byteCount = 12661 ifTrue: [self halt].
"
^ byteCount
]
{ #category : #UI }
CogVMSimulator >> byteCountText [
^(String streamContents: [:s| s nextPutAll: byteCount asStringWithCommas; nextPut: $/; nextPutAll: sendCount asStringWithCommas]) asText
]
{ #category : #'translation support' }
CogVMSimulator >> cCoerceSimple: value to: cTypeString [
"Type coercion for translation and simulation.
For simulation answer a suitable surrogate for the struct types"
^ cTypeString
caseOf: { ([ #'CogMethod *' ]
-> [ cogit cogMethodSurrogateAt: value asUnsignedInteger ]) }
otherwise: [ value ]
]
{ #category : #'plugin support' }
CogVMSimulator >> callExternalPrimitive: mapIndex [
| entry |
entry := self pluginEntryFor: mapIndex.
"Spur needs the primitiveFunctionPointer to be set correctly
for accurate following of forwarders on primitive failure."
primitiveFunctionPointer := entry at: 2.
^ (entry at: 1) perform: (entry at: 2)
]
{ #category : #trampolines }
CogVMSimulator >> ceReapAndResetErrorCodeFor: cogMethod [
"Override to map the address into a CogMethodSurrogate"
| surrogate |
surrogate := cogMethod isInteger
ifTrue: [cogit cogMethodSurrogateAt: cogMethod]
ifFalse: [cogMethod].
^super ceReapAndResetErrorCodeFor: surrogate
]
{ #category : #'object memory support' }
CogVMSimulator >> checkStackIntegrity [
"Override to deal with incomplete initialization."
stackPages ifNil: [^true].
stackPages pages ifNil: [^true].
^super checkStackIntegrity
]
{ #category : #'debug support' }
CogVMSimulator >> classAndSelectorOfMethod: meth forReceiver: rcvr [
| mClass dict length methodArray |
mClass := objectMemory fetchClassOf: rcvr.
[dict := objectMemory fetchPointer: MethodDictionaryIndex ofObject: mClass.
length := objectMemory numSlotsOf: dict.
methodArray := objectMemory fetchPointer: MethodArrayIndex ofObject: dict.
0 to: length-SelectorStart-1 do:
[:index |
meth = (objectMemory fetchPointer: index ofObject: methodArray)
ifTrue: [^ Array
with: mClass
with: (objectMemory fetchPointer: index + SelectorStart ofObject: dict)]].
mClass := objectMemory fetchPointer: SuperclassIndex ofObject: mClass.
mClass = objectMemory nilObject]
whileFalse: [].
^ Array
with: (objectMemory fetchClassOf: rcvr)
with: (objectMemory splObj: SelectorDoesNotUnderstand)
]
{ #category : #'plugin support' }
CogVMSimulator >> classNameOf: aClass Is: className [
"Check if aClass' name is className"
| name |
(objectMemory lengthOf: aClass) <= classNameIndex ifTrue:
[^false]. "Not a class but maybe behavior"
name := objectMemory fetchPointer: classNameIndex ofObject: aClass.
(objectMemory isBytes: name) ifFalse:
[^false].
^ className = (self stringOf: name)
]
{ #category : #'I/O primitives' }
CogVMSimulator >> clipboardRead: sz Into: actualAddress At: zeroBaseIndex [
| str |
str := Clipboard clipboardText.
1 to: sz do:
[:i | objectMemory byteAt: actualAddress + zeroBaseIndex + i - 1 put: (str at: i) asciiValue]
]
{ #category : #'I/O primitives' }
CogVMSimulator >> clipboardSize [
^ Clipboard clipboardText size
]
{ #category : #'debug support' }
CogVMSimulator >> cloneSimulation [
| savedAtEachStepBlock savedQuitBlock savedTranscript |
savedAtEachStepBlock := atEachStepBlock.
atEachStepBlock := nil.
savedQuitBlock := quitBlock.
quitBlock := nil.
savedTranscript := transcript.
transcript := nil.
^ [
| theClone |
Smalltalk garbageCollect.
theClone := self veryDeepCopy.
theClone
parent: self;
transcript: Transcript.
theClone objectMemory parent: objectMemory.
theClone ] ensure: [
atEachStepBlock := savedAtEachStepBlock.
quitBlock := savedQuitBlock.
transcript := savedTranscript ]
]
{ #category : #initialization }
CogVMSimulator >> close [ "close any files that ST may have opened, etc"
pluginList do: [:assoc| | plugin | plugin := assoc value. plugin ~~ self ifTrue: [plugin close]]
]
{ #category : #'primitive support' }
CogVMSimulator >> codeGeneratorToComputeAccessorDepth [
^ codeGeneratorToComputeAccessorDepth ifNil: [
(VMMaker new
vmmakerConfiguration: VMMakerConfiguration;
buildCodeGeneratorForInterpreter: CoInterpreterPrimitives
includeAPIMethods: false
initializeClasses: false)
logger: self transcript;
yourself]
]
{ #category : #'as yet unclassified' }
CogVMSimulator >> codeGeneratorToComputeAccessorDepth: aCCodeGenerator [
codeGeneratorToComputeAccessorDepth := aCCodeGenerator
]
{ #category : #'simulation only' }
CogVMSimulator >> cogit [
^cogit
]
{ #category : #'debug support' }
CogVMSimulator >> collectSends [
expectedSends := WriteStream on: (Array new: 65536).
expecting := false
]
{ #category : #'I/O primitives support' }
CogVMSimulator >> copyBits [
^ myBitBlt copyBits
]
{ #category : #'debug printing' }
CogVMSimulator >> cr [
traceOn ifTrue: [ transcript cr; flush ].
]
{ #category : #'debugging traps' }
CogVMSimulator >> createActualMessageTo: class [
class = objectMemory nilObject ifTrue: [self halt].
^super createActualMessageTo: class
]
{ #category : #'debug support' }
CogVMSimulator >> debugStackPointersFor: aMethod [
^CArrayAccessor on:
(StackDepthFinder on: (VMCompiledMethodProxy new
for: aMethod
coInterpreter: self
objectMemory: objectMemory))
stackPointers
]
{ #category : #initialization }
CogVMSimulator >> desiredCogCodeSize: anInteger [
desiredCogCodeSize := anInteger
]
{ #category : #UI }
CogVMSimulator >> desiredDisplayExtent [
^(savedWindowSize
ifNil: [640@480]
ifNotNil: [savedWindowSize >> 16 @ (savedWindowSize bitAnd: 16rFFFF)])
min: Display extent * 2 // 3
]
{ #category : #initialization }
CogVMSimulator >> desiredEdenBytes: anInteger [
desiredEdenBytes := anInteger
]
{ #category : #initialization }
CogVMSimulator >> desiredNumStackPages: anInteger [
desiredNumStackPages := anInteger
]
{ #category : #'plugin primitive support' }
CogVMSimulator >> dispatchMappedPluginEntry: n [
^(mappedPluginEntries at: n) first
perform: (mappedPluginEntries at: n) second
]
{ #category : #'interpreter shell' }
CogVMSimulator >> dispatchOn: anInteger in: selectorArray [
"Simulate a case statement via selector table lookup.
The given integer must be between 0 and selectorArray size-1, inclusive.
For speed, no range test is done, since it is done by the at: operation.
Note that, unlike many other arrays used in the Interpreter, this method expect NO CArrayAccessor wrapping - it would duplicate the +1. Maybe this would be better updated to make it all uniform"
cogit breakPC ifNil:
[cogit breakBlock ifNotNil:
[:bb| (bb value: cogit) ifTrue: [self halt: 'breakpoint reached']]].
self perform: (selectorArray at: (anInteger + 1)).
]
{ #category : #'debugging traps' }
CogVMSimulator >> divorceFrame: theFP andContext: ctxt [
"((#(16r100570 16r101BC8) includes: theFP) or: [#(16r17159A4 16r1715948) includes: ctxt]) ifTrue:
[self halt]."
^super divorceFrame: theFP andContext: ctxt
]
{ #category : #'process primitive support' }
CogVMSimulator >> doSignalExternalSemaphores: minTableSize [
"This is a non-thread-safe simulation. See platforms/Cross/vm/sqExternalSemaphores.c
for the real code. For the benefit of the SocketPluginSimulator, do a yield every 100
virtual microseconds."
| now switched |
now := self ioUTCMicroseconds.
now - lastYieldMicroseconds >= 100 ifTrue:
[lastYieldMicroseconds := now.
Processor yield].
switched := false.
1 to: (minTableSize min: externalSemaphoreSignalRequests size) do:
[:i| | responses |
responses := externalSemaphoreSignalResponses at: i.
[responses < (externalSemaphoreSignalRequests at: i)] whileTrue:
[(self doSignalSemaphoreWithIndex: i) ifTrue:
[switched := true].
externalSemaphoreSignalResponses at: i put: (responses := responses + 1)]].
^switched
]
{ #category : #'error handling' }
CogVMSimulator >> doesNotUnderstand: aMessage [
"If this is a doit and the objectMemory understands, pass it on."
(thisContext findContextSuchThat: [:ctxt| ctxt selector == #evaluate:in:to:notifying:ifFail:logged:]) ifNotNil:
[(objectMemory class whichClassIncludesSelector: aMessage selector) ifNotNil:
[:implementingClass|
(implementingClass inheritsFrom: Object) ifTrue: "i.e. VMClass and below"
[thisContext sender selector ~~ #DoIt ifTrue:
[Transcript nextPutAll: 'warning: redirecting ', aMessage selector, ' in ', thisContext sender printString, ' to objectMemory'; cr; flush].
aMessage lookupClass: nil.
^aMessage sentTo: objectMemory]].
(cogit class whichClassIncludesSelector: aMessage selector) ifNotNil:
[:implementingClass|
(implementingClass inheritsFrom: Object) ifTrue: "i.e. VMClass and below"
[thisContext sender selector ~~ #DoIt ifTrue:
[Transcript nextPutAll: 'warning: redirecting ', aMessage selector, ' in ', thisContext sender printString, ' to cogit'; cr; flush].
aMessage lookupClass: nil.
^aMessage sentTo: cogit]]].
^super doesNotUnderstand: aMessage
]
{ #category : #'I/O primitives support' }
CogVMSimulator >> drawLoopX: xDelta Y: yDelta [
^ myBitBlt drawLoopX: xDelta Y: yDelta
]
{ #category : #'debug support' }
CogVMSimulator >> dumpMethodHeader: hdr [
^ String streamContents:
[:strm |
strm nextPutAll: '<nArgs=', ((hdr >> 25) bitAnd: 16r1F) printString , '>'.
strm nextPutAll: '<nTemps=', ((hdr >> 19) bitAnd: 16r3F) printString , '>'.
strm nextPutAll: '<lgCtxt=', ((hdr >> 18) bitAnd: 16r1) printString , '>'.
strm nextPutAll: '<nLits=', ((hdr >> 10) bitAnd: 16rFF) printString , '>'.
strm nextPutAll: '<prim=', ((hdr >> 1) bitAnd: 16r1FF) printString , '>'.
]
]
{ #category : #'debug printing' }
CogVMSimulator >> elementsPerPrintOopLine [
^4
]
{ #category : #'debugging traps' }
CogVMSimulator >> enableCog: aBoolean [
enableCog := aBoolean
]
{ #category : #'debug support' }
CogVMSimulator >> expectSends: anArray [
expectedSends := ReadStream on: anArray.
expecting := true
]
{ #category : #'miscellaneous bytecodes' }
CogVMSimulator >> extABytecode [
"224 11100000 aaaaaaaa Extend A (Ext A = Ext A prev * 256 + Ext A)"
(extA = 0 and: [extB = 0]) ifTrue:
[lastExtPC := instructionPointer].
^super extABytecode
]
{ #category : #'miscellaneous bytecodes' }
CogVMSimulator >> extBBytecode [
"225 11100001 sbbbbbbb Extend B (Ext B = Ext B prev * 256 + Ext B)"
(extA = 0 and: [extB = 0]) ifTrue:
[lastExtPC := instructionPointer].
^super extBBytecode
]
{ #category : #'jump bytecodes' }
CogVMSimulator >> extUnconditionalJump [
"242 11110010 i i i i i i i i Jump i i i i i i i i (+ Extend B * 256, where bbbbbbbb = sddddddd, e.g. -32768 = i=0, a=0, s=1)"
"| byte offset |
byte := objectMemory byteAt: localIP + 1.
offset := byte + (extB << 8).
(offset < 0 and: [(self iframeBackwardBranchByte: localFP) - 2 = 1]) ifTrue: [self halt]."
^super extUnconditionalJump
]
{ #category : #'interpreter shell' }
CogVMSimulator >> fetchByte [
^objectMemory byteAt: (instructionPointer := instructionPointer + 1)
]
{ #category : #'interpreter access' }
CogVMSimulator >> fetchPointer: fieldIndex ofObject: oop [
"index by word size, and return a pointer as long as the word size"
self assert: (objectMemory cheapIsInMemory: oop).
^objectMemory fetchPointer: fieldIndex ofObject: oop
]
{ #category : #'control primitives' }
CogVMSimulator >> filterPerformOf: selector to: receiver [
"This is to allow simulator to filter start-up items to avoid as-yet unsimulatable plugins."
performFilters ifNil: [^false].
(performFilters at: (self shortPrint: receiver) ifAbsent: []) ifNotNil:
[:messages|
^messages includes: (self stringOf: selector)].
^false
]
{ #category : #'memory access' }
CogVMSimulator >> firstIndexableField: oop [
"This is in ObjectMemory and overridden in the obj mem simulators"
self shouldNotImplement
]
{ #category : #'debug printing' }
CogVMSimulator >> flush [
<cmacro: '() fflush(stdout)'>
traceOn ifTrue: [transcript flush]
]
{ #category : #'plugin support' }
CogVMSimulator >> flushExternalPrimitives [
self initializePluginEntries.
super flushExternalPrimitives
]
{ #category : #'control primitives' }
CogVMSimulator >> forShortPrintString: shortPrintString filterPerformMessages: aCollection [
performFilters ifNil:
[performFilters := Dictionary new].
performFilters at: shortPrintString put: aCollection
]
{ #category : #'frame access' }
CogVMSimulator >> frameOfMarriedContext: aContext [
| senderOop |
senderOop := objectMemory fetchPointer: SenderIndex ofObject: aContext.
self assert: (objectMemory isIntegerObject: senderOop).
^self withoutSmallIntegerTags: senderOop
]
{ #category : #'debug support' }
CogVMSimulator >> framePointer [
^framePointer
]
{ #category : #'plugin primitives' }
CogVMSimulator >> functionForPrimitiveExternalCall: methodObj [
"Override to jump through the plugin simulation hoops."
| symbolOrIndex |
symbolOrIndex := super functionForPrimitiveExternalCall: methodObj.
^symbolOrIndex isSymbol
ifTrue: [symbolOrIndex]
ifFalse: [(self pluginEntryFor: symbolOrIndex) at: 3]
]
{ #category : #'interpreter shell' }
CogVMSimulator >> functionPointerFor: primIndex inClass: lookupClass [
"Override Interpreter to handle the external primitives caching. See also
internalExecuteNewMethod."
^(primIndex between: 1 and: MaxPrimitiveIndex)
ifTrue: [primitiveTable at: primIndex + 1]
ifFalse: [0]
]
{ #category : #'cog jit support' }
CogVMSimulator >> functionPointerForCompiledMethod: methodObj primitiveIndex: primIndex [
^self mapFunctionToAddress: (super functionPointerForCompiledMethod: methodObj primitiveIndex: primIndex)
]
{ #category : #'memory access' }
CogVMSimulator >> halfWordHighInLong32: long32 [
^self subclassResponsibility
]
{ #category : #'memory access' }
CogVMSimulator >> halfWordLowInLong32: long32 [
^self subclassResponsibility
]
{ #category : #'debug support' }
CogVMSimulator >> headerStart: oop [
^ (objectMemory extraHeaderBytes: oop) negated
]
{ #category : #'debug support' }
CogVMSimulator >> heapMapAtWord: address Put: aBit [
^objectMemory heapMap heapMapAtWord: address asUnsignedInteger Put: aBit
]
{ #category : #'image save/restore' }
CogVMSimulator >> imageName [
^imageName
]
{ #category : #'spur bootstrap' }
CogVMSimulator >> imageName: aString [
imageName := aString
]
{ #category : #'file primitives' }
CogVMSimulator >> imageNameGet: p Length: sz [
1 to: sz do:
[:i |
objectMemory
byteAt: p + i - 1
put: (imageName at: i) asInteger]
]
{ #category : #'file primitives' }
CogVMSimulator >> imageNamePut: p Length: sz [
| newName |
newName := ByteString new: sz.
1 to: sz do: [ :i |
newName
at: i
put: (Character value: (objectMemory byteAt: p + i - 1)) ].
imageName := newName
]
{ #category : #'file primitives' }
CogVMSimulator >> imageNameSize [
^imageName size
]
{ #category : #'rump c stack' }
CogVMSimulator >> inMemoryCFramePointerAddress [
^self rumpCStackAddress - 16
]
{ #category : #initialization }
CogVMSimulator >> inMemoryCStackPointerAddress [
^self rumpCStackAddress - 8
]
{ #category : #'rump c stack' }
CogVMSimulator >> inMemoryStackLimitAddress [
^self rumpCStackAddress - 24
]
{ #category : #'rump c stack' }
CogVMSimulator >> inMemoryVMOwnerLockAddress [
^self rumpCStackAddress - 48
]
{ #category : #'interpreter shell' }
CogVMSimulator >> incrementByteCount [
(byteCount := byteCount + 1) = breakCount ifTrue:
[ self halt: 'breakCount reached' ].
byteCount \\ 1000 = 0 ifTrue:
[ self forceInterruptCheck ]
]
{ #category : #'test support' }
CogVMSimulator >> initStackPagesForTests [
numStackPages := 8.
stackPages := self stackPagesClass new setInterpreter: self.
objectMemory memoryManager allocate: 1024 * 1024.
cogCodeSize := 0.
self initStackPages
]
{ #category : #accessing }
CogVMSimulator >> initialAddress [
^ initialAddress
]
{ #category : #initialization }
CogVMSimulator >> initialize [
"Initialize the CogVMSimulator when running the interpreter inside Smalltalk. The
primary responsibility of this method is to allocate Smalltalk Arrays for variables
that will be declared as statically-allocated global arrays in the translated code."
self basicInitialize.
self initializePluginEntries.
]
{ #category : #'plugin support' }
CogVMSimulator >> initializePluginEntries [
mappedPluginEntries := OrderedCollection new.
primitiveAccessorDepthTable := Array new: primitiveTable size.
pluginList := { }.
self loadNewPlugin: ''
]
{ #category : #'interpreter shell' }
CogVMSimulator >> insufficientMemorySpecifiedError [
self error: 'Insufficient memory for this image'
]
{ #category : #'interpreter shell' }
CogVMSimulator >> interpret [
"This is the main interpreter loop. It normally loops forever, fetching and executing bytecodes.
When running in the context of a web browser plugin VM, however, it must return control to the
web browser periodically. This should done only when the state of the currently running Squeak
thread is safely stored in the object heap. Since this is the case at the moment that a check for
interrupts is performed, that is when we return to the browser if it is time to do so. Interrupt
checks happen quite frequently.
Override for simulation to insert bytecode breakpoint support."
"If stacklimit is zero then the stack pages have not been initialized."
<inline: false>
stackLimit = 0 ifTrue: [ ^ self initStackPagesAndInterpret ].
self initExtensions.
self fetchNextBytecode.
[ true ] whileTrue: [
self assertValidExecutionPointers.
atEachStepBlock value. "N.B. may be nil"
self dispatchOn: currentBytecode in: BytecodeTable.
self incrementByteCount ].
instructionPointer := instructionPointer - 1. "undo the pre-increment of IP before returning"
^ nil
]
{ #category : #'stack pages' }
CogVMSimulator >> interpreterAllocationReserveBytes [
^ bootstrapping
ifTrue: [ 0 ]
ifFalse: [ super interpreterAllocationReserveBytes ]
]
{ #category : #'interpreter shell' }
CogVMSimulator >> invalidCompactClassError: name [
self error: 'Class ', name, ' does not have the required compact class index'
]
{ #category : #security }
CogVMSimulator >> ioCanRenameImage [
^true
]
{ #category : #security }
CogVMSimulator >> ioCanWriteImage [
^true
]
{ #category : #'primitive support' }
CogVMSimulator >> ioExit [
quitBlock value "Cause return from #test"
]
{ #category : #'primitive support' }
CogVMSimulator >> ioExitWithErrorCode: ec [
self ioExit
]
{ #category : #'process primitive support' }
CogVMSimulator >> ioGetMaxExtSemTableSize [
^extSemTabSize
]
{ #category : #'I/O primitives support' }
CogVMSimulator >> ioHeartbeatMilliseconds [
^1
]
{ #category : #'I/O primitives support' }
CogVMSimulator >> ioHighResClock [
^self ioUTCMicroseconds
]
{ #category : #initialization }
CogVMSimulator >> ioInitHeartbeat [
"No-op in the simulator. We cause a poll every 1000 bytecodes instead."
]
{ #category : #'plugin support' }
CogVMSimulator >> ioLoadFunction: functionString From: pluginString [
"Load and return the requested function from a module"
| firstTime plugin fnSymbol |
firstTime := false.
fnSymbol := functionString asSymbol.
transcript
cr;
show: '(', byteCount printString, ') Looking for ', functionString, ' in ',
(pluginString isEmpty ifTrue: ['vm'] ifFalse: [pluginString]).
(breakSelector notNil
and: [(pluginString size = breakSelector size
and: [(self strncmp: pluginString _: breakSelector _: pluginString size) = 0])
or: [functionString size = breakSelector size
and: [(self strncmp: functionString _: breakSelector _: functionString size) = 0]]]) ifTrue:
[self halt: pluginString, '>>', functionString].
plugin := pluginList
detect: [:any| any key = pluginString asString]
ifNone:
[firstTime := true.
self loadNewPlugin: pluginString].
plugin ifNil:
[firstTime ifTrue: [transcript cr; show: '... FAILED; no plugin found'].
^0].
plugin := plugin value.
mappedPluginEntries withIndexDo:
[:pluginAndName :index|
((pluginAndName at: 1) == plugin
and:[(pluginAndName at: 2) == fnSymbol]) ifTrue:
[^index]].
(plugin respondsTo: fnSymbol) ifFalse:
[firstTime ifTrue: [transcript cr; show: '... FAILED; primitive not in plugin'].
^0].
mappedPluginEntries addLast: { plugin. fnSymbol. [plugin perform: fnSymbol. self]}.
transcript show: ' ... okay'.
^mappedPluginEntries size
]
{ #category : #'plugin support' }
CogVMSimulator >> ioLoadFunction: functionString From: pluginString AccessorDepthInto: accessorDepthPtr [
"Load and return the requested function from a module.
Assign the accessor depth through accessorDepthPtr.
N.B. The actual code lives in platforms/Cross/vm/sqNamedPrims.h"
| firstTime plugin fnSymbol |
firstTime := false.
fnSymbol := functionString asSymbol.
transcript
cr;
show: '(', byteCount printString, ') Looking for ', functionString, ' in ',
(pluginString isEmpty ifTrue: ['vm'] ifFalse: [pluginString]).
(breakSelector notNil
and: [(pluginString size = breakSelector size
and: [(self strncmp: pluginString _: breakSelector _: pluginString size) = 0])
or: [functionString size = breakSelector size
and: [(self strncmp: functionString _: breakSelector _: functionString size) = 0]]]) ifTrue:
[self halt: pluginString, '>>', functionString].
plugin := pluginList
detect: [:any| any key = pluginString asString]
ifNone:
[firstTime := true.
self loadNewPlugin: pluginString].
plugin ifNil:
[firstTime ifTrue: [transcript cr; show: '... FAILED; primitive not in plugin'].
^0].
plugin := plugin value.
mappedPluginEntries withIndexDo:
[:pluginAndName :index|
((pluginAndName at: 1) == plugin
and:[(pluginAndName at: 2) == fnSymbol]) ifTrue:
[firstTime ifTrue: [transcript show: ' ... okay'].
accessorDepthPtr at: 0 put: (pluginAndName at: 4).
^index]].
firstTime ifTrue: [transcript cr; show: '... FAILED; primitive not in plugin'].
^0
]