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Cogit.class.st
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Cogit.class.st
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"
I am the code generator for the Cog VM. My job is to produce machine code versions of methods for faster execution and to manage inline caches for faster send performance. I can be tested in the current image using my class-side in-image compilation facilities. e.g. try
StackToRegisterMappingCogit genAndDis: (Integer >> #benchFib)
I have concrete subclasses that implement different levels of optimization:
SimpleStackBasedCogit is the simplest code generator.
StackToRegisterMappingCogit is the current production code generator It defers pushing operands
to the stack until necessary and implements a register-based calling convention for low-arity sends.
SistaCogit is an experimental code generator with support for counting
conditional branches, intended to support adaptive optimization.
RegisterAllocatingCogit is an experimental code generator with support for allocating temporary variables
to registers. It is inended to serve as the superclass to SistaCogit once it is working.
SistaRegisterAllocatingCogit and SistaCogitClone are temporary classes that allow testing a clone of
SistaCogit that inherits from RegisterAllocatingCogit. Once things work these will be merged and
will replace SistaCogit.
coInterpreter <CoInterpreterSimulator>
the VM's interpreter with which I cooperate
methodZoneManager <CogMethodZoneManager>
the manager of the machine code zone
objectRepresentation <CogObjectRepresentation>
the object used to generate object accesses
processor <BochsIA32Alien|?>
the simulator that executes the IA32/x86 machine code I generate when simulating execution in Smalltalk
simulatedTrampolines <Dictionary of Integer -> MessageSend>
the dictionary mapping trap jump addresses to run-time routines used to warp from simulated machine code in to the Smalltalk run-time.
simulatedVariableGetters <Dictionary of Integer -> MessageSend>
the dictionary mapping trap read addresses to variables in run-time objects used to allow simulated machine code to read variables in the Smalltalk run-time.
simulatedVariableSetters <Dictionary of Integer -> MessageSend>
the dictionary mapping trap write addresses to variables in run-time objects used to allow simulated machine code to write variables in the Smalltalk run-time.
printRegisters printInstructions clickConfirm <Boolean>
flags controlling debug printing and code simulation
breakPC <Integer>
machine code pc breakpoint
cFramePointer cStackPointer <Integer>
the variables representing the C stack & frame pointers, which must change on FFI callback and return
selectorOop <sqInt>
the oop of the methodObj being compiled
methodObj <sqInt>
the bytecode method being compiled
initialPC endPC <Integer>
the start and end pcs of the methodObj being compiled
methodOrBlockNumArgs <Integer>
argument count of current method or block being compiled
needsFrame <Boolean>
whether methodObj or block needs a frame to execute
primitiveIndex <Integer>
primitive index of current method being compiled
methodLabel <CogAbstractOpcode>
label for the method header
blockEntryLabel <CogAbstractOpcode>
label for the start of the block dispatch code
stackOverflowCall <CogAbstractOpcode>
label for the call of ceStackOverflow in the method prolog
sendMissCall <CogAbstractOpcode>
label for the call of ceSICMiss in the method prolog
entryOffset <Integer>
offset of method entry code from start (header) of method
entry <CogAbstractOpcode>
label for the first instruction of the method entry code
noCheckEntryOffset <Integer>
offset of the start of a method proper (after the method entry code) from start (header) of method
noCheckEntry <CogAbstractOpcode>
label for the first instruction of start of a method proper
fixups <Array of <AbstractOpcode Label | nil>>
the labels for forward jumps that will be fixed up when reaching the relevant bytecode. fixups has one element per byte in methodObj's bytecode; initialPC maps to fixups[0].
abstractOpcodes <Array of <AbstractOpcode>>
the code generated when compiling methodObj
byte0 byte1 byte2 byte3 <Integer>
individual bytes of current bytecode being compiled in methodObj
bytecodePointer <Integer>
bytecode pc (same as Smalltalk) of the current bytecode being compiled
opcodeIndex <Integer>
the index of the next free entry in abstractOpcodes (this code is translated into C where OrderedCollection et al do not exist)
numAbstractOpcodes <Integer>
the number of elements in abstractOpcocdes
blockStarts <Array of <BlockStart>>
the starts of blocks in the current method
blockCount
the index into blockStarts as they are being noted, and hence eventually the total number of blocks in the current method
labelCounter <Integer>
a nicety for numbering labels not needed in the production system but probably not expensive enough to worry about
ceStackOverflowTrampoline <Integer>
ceSend0ArgsTrampoline <Integer>
ceSend1ArgsTrampoline <Integer>
ceSend2ArgsTrampoline <Integer>
ceSendNArgsTrampoline <Integer>
ceSendSuper0ArgsTrampoline <Integer>
ceSendSuper1ArgsTrampoline <Integer>
ceSendSuper2ArgsTrampoline <Integer>
ceSendSuperNArgsTrampoline <Integer>
ceSICMissTrampoline <Integer>
ceCPICMissTrampoline <Integer>
ceStoreCheckTrampoline <Integer>
ceReturnToInterpreterTrampoline <Integer>
ceBaseFrameReturnTrampoline <Integer>
ceSendMustBeBooleanTrampoline <Integer>
ceClosureCopyTrampoline <Integer>
the various trampolines (system-call-like jumps from machine code to the run-time).
See Cogit>>generateTrampolines for the mapping from trampoline to run-time
routine and then read the run-time routine for a funcitonal description.
ceEnterCogCodePopReceiverReg <Integer>
the enilopmart (jump from run-time to machine-code)
methodZoneBase <Integer>
"
Class {
#name : #Cogit,
#superclass : #VMClass,
#instVars : [
'coInterpreter',
'objectMemory',
'objectRepresentation',
'processor',
'methodZone',
'methodZoneBase',
'codeBase',
'minValidCallAddress',
'lastNInstructions',
'simulatedAddresses',
'simulatedTrampolines',
'simulatedVariableGetters',
'simulatedVariableSetters',
'printRegisters',
'printInstructions',
'compilationTrace',
'clickConfirm',
'breakPC',
'breakBlock',
'singleStep',
'guardPageSize',
'traceFlags',
'traceStores',
'breakMethod',
'methodObj',
'enumeratingCogMethod',
'methodHeader',
'initialPC',
'endPC',
'methodOrBlockNumArgs',
'inBlock',
'needsFrame',
'hasYoungReferent',
'primitiveIndex',
'backEnd',
'literalsManager',
'postCompileHook',
'methodLabel',
'stackCheckLabel',
'stackOverflowCall',
'sendMiss',
'missOffset',
'entryPointMask',
'checkedEntryAlignment',
'uncheckedEntryAlignment',
'cmEntryOffset',
'entry',
'cmNoCheckEntryOffset',
'noCheckEntry',
'fullBlockEntry',
'cbEntryOffset',
'fullBlockNoContextSwitchEntry',
'cbNoSwitchEntryOffset',
'picMNUAbort',
'picInterpretAbort',
'endCPICCase0',
'endCPICCase1',
'firstCPICCaseOffset',
'cPICCaseSize',
'cPICEndSize',
'closedPICSize',
'openPICSize',
'fixups',
'abstractOpcodes',
'generatorTable',
'byte0',
'byte1',
'byte2',
'byte3',
'bytecodePC',
'opcodeIndex',
'numAbstractOpcodes',
'labelCounter',
'cStackAlignment',
'expectedSPAlignment',
'expectedFPAlignment',
'codeModified',
'maxLitIndex',
'ceMethodAbortTrampoline',
'cePICAbortTrampoline',
'ceCheckForInterruptTrampoline',
'ceCPICMissTrampoline',
'ceReturnToInterpreterTrampoline',
'ceBaseFrameReturnTrampoline',
'ceReapAndResetErrorCodeTrampoline',
'ceSendMustBeBooleanAddTrueTrampoline',
'ceSendMustBeBooleanAddFalseTrampoline',
'ceCannotResumeTrampoline',
'ceEnterCogCodePopReceiverReg',
'ceCallCogCodePopReceiverReg',
'ceCallCogCodePopReceiverAndClassRegs',
'cePrimReturnEnterCogCode',
'cePrimReturnEnterCogCodeProfiling',
'ceNonLocalReturnTrampoline',
'ceFetchContextInstVarTrampoline',
'ceStoreContextInstVarTrampoline',
'ceEnclosingObjectTrampoline',
'ceFlushICache',
'ceCheckFeaturesFunction',
'ceTraceLinkedSendTrampoline',
'ceTraceBlockActivationTrampoline',
'ceTraceStoreTrampoline',
'ceGetFP',
'ceGetSP',
'ceCaptureCStackPointers',
'ordinarySendTrampolines',
'superSendTrampolines',
'directedSuperSendTrampolines',
'directedSuperBindingSendTrampolines',
'dynamicSuperSendTrampolines',
'outerSendTrampolines',
'selfSendTrampolines',
'firstSend',
'lastSend',
'realCEEnterCogCodePopReceiverReg',
'realCECallCogCodePopReceiverReg',
'realCECallCogCodePopReceiverAndClassRegs',
'trampolineTableIndex',
'trampolineAddresses',
'objectReferencesInRuntime',
'runtimeObjectRefIndex',
'cFramePointerInUse',
'debugPrimCallStackOffset',
'ceTryLockVMOwner',
'ceUnlockVMOwner',
'extA',
'extB',
'numExtB',
'tempOop',
'numIRCs',
'indexOfIRC',
'theIRCs',
'receiverTags',
'implicitReceiverSendTrampolines',
'cogMethodSurrogateClass',
'cogBlockMethodSurrogateClass',
'CStackPointer',
'CFramePointer',
'cPICPrototype',
'cPICEndOfCodeOffset',
'cPICEndOfCodeLabel',
'ceMallocTrampoline',
'ceFreeTrampoline',
'debugBytecodePointers',
'debugOpcodeIndices',
'disassemblingMethod',
'cogConstituentIndex',
'directedSendUsesBinding',
'simulateFPInUse',
'statCompileFullBlockCount',
'statCompileFullBlockUsecs',
'statCompileMethodCount',
'statCompileMethodUsecs',
'ceSendMustBeBooleanTrampoline',
'jitCodeZoneWriteEnabled',
'ceDeoptimiseFrameTrampoline'
],
#classVars : [
'AnnotationConstantNames',
'AnnotationShift',
'AnnotationsWithBytecodePCs',
'Debug',
'DisplacementMask',
'DisplacementX2N',
'EagerInstructionDecoration',
'FirstAnnotation',
'FirstSpecialSelector',
'HasBytecodePC',
'IsAbsPCReference',
'IsAnnotationExtension',
'IsDirectedSuperBindingSend',
'IsDirectedSuperSend',
'IsDisplacementX2N',
'IsObjectReference',
'IsRelativeCall',
'IsSendCall',
'IsSuperSend',
'MapEnd',
'MaxCPICCases',
'MaxCompiledPrimitiveIndex',
'MaxNumberOfAbstractOpcodes',
'MaxX2NDisplacement',
'NumObjRefsInRuntime',
'NumOopsPerNSC',
'NumSpecialSelectors',
'NumTrampolines',
'ProcessorClass',
'RRRName'
],
#pools : [
'CogAbstractRegisters',
'CogCompilationConstants',
'CogMethodConstants',
'CogRTLOpcodes',
'VMBasicConstants',
'VMBytecodeConstants',
'VMObjectIndices',
'VMStackFrameOffsets'
],
#classInstVars : [
'generatorTable',
'primitiveTable'
],
#category : #'VMMaker-JIT'
}
{ #category : #translation }
Cogit class >> activeCompilerClass [
^InitializationOptions
at: #CogCompilerClass
ifPresent: [:compilerClassName| Smalltalk classNamed: compilerClassName]
ifAbsent:
[(CogAbstractInstruction subclasses detect:
[:compilerClass|
compilerClass ISA == (InitializationOptions at: #ISA ifAbsent: [#IA32])]) defaultCompilerClass]
]
{ #category : #translation }
Cogit class >> additionalHeadersDo: aBinaryBlock [
"Evaluate aBinaryBlock with the names and contents of
any additional header files that need to be generated."
aBinaryBlock
value: 'cogmethod.h'
value: CogMethod cogMethodHeader
]
{ #category : #translation }
Cogit class >> additionalSelectorTables [
^self tableFunctions
]
{ #category : #translation }
Cogit class >> ancilliaryClasses [
"Answer any extra classes to be included in the translation."
ProcessorClass ifNil:
[Cogit initializeMiscConstants].
^(self activeCompilerClass withAllSuperclasses copyUpThrough: CogAbstractInstruction),
{ CogMethodZone.
CogBytecodeDescriptor.
CogBytecodeFixup.
CogPrimitiveDescriptor.
CogMethod.
CogPrimitiveCallState.
self activeCompilerClass literalsManagerClass},
((InitializationOptions at: #SistaVM ifAbsent: [false])
ifTrue: [{SistaMethodZone}]
ifFalse: [#()])
]
{ #category : #'class initialization' }
Cogit class >> annotationConstantNames [
"for printing..."
^AnnotationConstantNames
]
{ #category : #translation }
Cogit class >> apiExportHeaderName [
^'cogit.h'
]
{ #category : #'in-image compilation support' }
Cogit class >> asOptionsDictionary: optionsDictionaryOrArray [
optionsDictionaryOrArray isArray ifTrue:
[| dict |
dict := Dictionary new.
self assert: optionsDictionaryOrArray size even.
1 to: optionsDictionaryOrArray size by: 2 do:
[:i| | key |
key := optionsDictionaryOrArray at: i.
self assert: key isSymbol.
dict at: key put: (optionsDictionaryOrArray at: i + 1)].
^dict].
^optionsDictionaryOrArray
]
{ #category : #documentation }
Cogit class >> assumptions [
"Byte architecture; no 9-bit bit bytes etc.
Stacks grow down. No support for HPPA.
No delay slots. No support for SPARC.
Relative jumps.
All long conditional branches are of the same size.
All long unconditional branches are of the same size.
All MoveCwRs are of the same size.
A long jump and a call have the same displacement layout so both can be labelled with IsRelativeCall.
A PushCw and a MoveCwR have the same constant layout so both can be labelled with IsObjectReference or IsMethodReference.
64k of code per method more than enough"
]
{ #category : #'in-image compilation support' }
Cogit class >> attemptToComputeInstVarNamesFor: aCompiledMethod [
(aCompiledMethod methodClass instSize > 0) ifTrue:
[InitializationOptions
at: #instVarNames
put: (aCompiledMethod methodClass allInstVarNames)]
]
{ #category : #'in-image compilation support' }
Cogit class >> attemptToComputeTempNamesFor: aCompiledMethod [
(aCompiledMethod respondsTo: #tempNames) ifTrue:
[| schematicTemps blocks |
schematicTemps := aCompiledMethod methodNode schematicTempNamesString.
blocks := aCompiledMethod embeddedBlockClosures.
InitializationOptions
at: #tempNames
put: (Dictionary newFrom: {aCompiledMethod initialPC -> (self decomposeSchematicTemps: (schematicTemps copyUpTo: $[))},
(blocks
ifEmpty: [#()]
ifNotEmpty:
[aCompiledMethod embeddedBlockClosures
with: (schematicTemps first = $[
ifTrue: [schematicTemps piecesCutWhere: [:a :b| b = $[]]
ifFalse: [(schematicTemps piecesCutWhere: [:a :b| b = $[]) allButFirst])
collect: [:c :s| c startpc -> (self decomposeSchematicTemps: (s copyWithoutAll: '[]'))]]))]
]
{ #category : #'accessing class hierarchy' }
Cogit class >> chooseCogitClass [
^Smalltalk at: ([:choices| choices at: (UIManager default chooseFrom: choices) ifAbsent: [^nil]]
value: (Cogit allSubclasses collect: [:ea| ea name]) sorted)
]
{ #category : #'in-image compilation' }
Cogit class >> cog: aCompiledMethod [
^self cog: aCompiledMethod options: #()
]
{ #category : #'in-image compilation' }
Cogit class >> cog: aCompiledMethod options: optionsArray [
^self cog: aCompiledMethod selectorOrNumCopied: aCompiledMethod selector options: optionsArray
]
{ #category : #'in-image compilation' }
Cogit class >> cog: aCompiledMethod selector: aSelector [
^self cog: aCompiledMethod selectorOrNumCopied: aSelector options: #()
]
{ #category : #'in-image compilation' }
Cogit class >> cog: aCompiledMethod selectorOrNumCopied: selectorOrNumCopied options: optionsDictionaryOrArray [
"StackToRegisterMappingCogit cog: (Integer >> #benchFib) selector: #benchFib options: #()"
| cogit coInterpreter |
cogit := self initializedInstanceForTests: optionsDictionaryOrArray.
coInterpreter := cogit coInterpreter.
self attemptToComputeTempNamesFor: aCompiledMethod.
self attemptToComputeInstVarNamesFor: aCompiledMethod.
^{ coInterpreter.
cogit.
selectorOrNumCopied isInteger
ifTrue: [ cogit cogFullBlockMethod: (coInterpreter oopForObject: aCompiledMethod) numCopied: selectorOrNumCopied ]
ifFalse: [ cogit cog: (coInterpreter oopForObject: aCompiledMethod) selector: (coInterpreter oopForObject: selectorOrNumCopied) ] }
]
{ #category : #documentation }
Cogit class >> cogToBytecodeMethodMapping [
"When first written the VM maintained a one-to-one mapping between bytecoded methods and cog methods.
The map is implemented with a direct reference form the methodObject field of a CogMethod to the bytecoded
method and by setting the header word of the bytecoded method to the CogMethod. Newspeak forced a change
in this since Newspeak shares anonymous (nil methodClassAssociation) accessors (setters and getters) amongst
classes and mixins throughout the system (i.e. these accessors are in dictionaries under selector keys that don't
match the accessor methods' selectors). But the inline cacheing relinking/un;linking machinery depends on
CogMethods having the correct selector, since to unlink/relink the selector is fetched from the inline cache's
target method. So the VM has been modified to not insist on a one-to-one mapping. Instead, when a bytecoded
method is to be used with a different selector it is attached to the new CogMethod.
This choice means that CogMethods do refer to a valid bytecoded method, but the bytecoded method might
not necessarily refer back to a CogMethod referring to it. So when CogMethods are freed care must be taken
to reset the bytecoded method's header if it is referring to the freed CogMethod."
]
{ #category : #translation }
Cogit class >> declareCVarsIn: aCCodeGenerator [
#( 'coInterpreter' 'objectMemory' 'methodZone' 'objectRepresentation'
'cogBlockMethodSurrogateClass' 'cogMethodSurrogateClass'
'processor' 'lastNInstructions' 'simulatedAddresses'
'simulatedTrampolines' 'simulatedVariableGetters'
'simulatedVariableSetters' 'printRegisters' 'printInstructions'
'clickConfirm' 'singleStep' ) do: [
:simulationVariableNotNeededForRealVM |
aCCodeGenerator removeVariable: simulationVariableNotNeededForRealVM ].
#( 'selfSendTrampolines' 'dynamicSuperSendTrampolines'
'implicitReceiverSendTrampolines'
'outerSendTrampolines' 'ceEnclosingObjectTrampoline'
'numIRCs' 'indexOfIRC' 'theIRCs' ) do: [
:variableNotNeededInNormalVM |
aCCodeGenerator removeVariable: variableNotNeededInNormalVM ].
aCCodeGenerator
addHeaderFile: '<stddef.h>';
"for e.g. offsetof"addHeaderFile: '"jit/jit.h"';
addHeaderFile: '"debug.h"';
addHeaderFile: '"sqCogStackAlignment.h"';
addHeaderFile: '"dispdbg.h"';
"must precede cointerp.h & cogit.h otherwise NoDbgRegParms gets screwed up"
addHeaderFile: '"cogmethod.h"'.
aCCodeGenerator
addHeaderFile: '"vmMemoryMap.h"';
addHeaderFile: '"vmRememberedSet.h"';
addHeaderFile: '"cointerp.h"';
addHeaderFile: '"cogit.h"';
addHeaderFile: '<stdint.h>'.
aCCodeGenerator addHeaderFile: '<pthread.h>'.
aCCodeGenerator
var: #ceGetFP declareC: 'usqIntptr_t (*ceGetFP)(void)';
var: #ceGetSP declareC: 'usqIntptr_t (*ceGetSP)(void)';
var: #ceCaptureCStackPointers
declareC: 'void (*ceCaptureCStackPointers)(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: #ceFlushICache
declareC:
'static void (*ceFlushICache)(usqIntptr_t from, usqIntptr_t to)';
var: #ceCheckFeaturesFunction
declareC: 'static usqIntptr_t (*ceCheckFeaturesFunction)(void)';
var: #ceTryLockVMOwner
declareC: 'usqIntptr_t (*ceTryLockVMOwner)(void)';
var: #ceUnlockVMOwner declareC: 'void (*ceUnlockVMOwner)(void)';
var: #postCompileHook
declareC: 'void (*postCompileHook)(CogMethod *)';
var: #openPICList declareC: 'CogMethod *openPICList = 0';
var: #maxMethodBefore type: #'CogMethod *';
var: 'enumeratingCogMethod' type: #'CogMethod *'.
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: #fixups type: #'BytecodeFixup *'.
aCCodeGenerator
var: #jitCodeZoneWriteEnabled
declareC: 'int jitCodeZoneWriteEnabled = 0';
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]' ].
aCCodeGenerator
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: #CFramePointer type: #'void *';
declareVar: #CStackPointer type: #'void *';
declareVar: #minValidCallAddress type: #usqIntptr_t;
declareVar: #debugPrimCallStackOffset 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 Smalltak 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'
]
{ #category : #'in-image compilation support' }
Cogit class >> decomposeSchematicTemps: aString [
^Array streamContents:
[:ws| | rs |
rs := aString readStream.
[rs atEnd] whileFalse:
[ws nextPut: (rs peek = $(
ifTrue: [[rs upThrough: $)]
on: MessageNotUnderstood
do: [:ex| (rs upTo: $)), ')']]
ifFalse: [rs upTo: Character space])]]
]
{ #category : #'C translation' }
Cogit class >> defineAtCompileTime: anObject [
"Override to define at translation time those variables that need to
be defined at compile time only in plugins, but not in the main VM,
because the VM generated is specific to these varables."
anObject isSymbol ifFalse:
[^false].
(#(STACKVM COGVM SPURVM) includes: anObject) ifTrue:
[^false].
^VMBasicConstants namesDefinedAtCompileTime includes: anObject
]
{ #category : #translation }
Cogit class >> doInlining [
"inline only those methods that are marked with <inline: true>"
^#asSpecifiedOrQuick
]
{ #category : #'in-image compilation' }
Cogit class >> genAndDisPICoptions: optionsDictionaryOrArray [
"StackToRegisterMappingCogit genAndDisPICoptions: #(ISA ARMv5 CogCompilerClass CogOutOfLineLiteralsARMCompiler)"
| cogit |
cogit := self initializedInstanceForTests: optionsDictionaryOrArray.
cogit disassembleFrom: cogit cPICPrototype + (cogit sizeof: CogMethod) to: cogit cPICPrototype + cogit closedPICSize
]
{ #category : #translation }
Cogit class >> generateCodeStringForCogitDotC [
"Generate a skeletal cogit.c that includes the relevant cogitFOO.c
for the appropriate subclasses of CogAbstractInstruction.
self generateCodeStringForCogitDotC"
| string insertPosition abis defaultDef |
abis := OrderedCollection new.
string := String streamContents:
[:s|
s nextPutAll: '/* Automatically generated by\ ' withCRs.
s nextPutAll: (CCodeGenerator monticelloDescriptionFor: self).
s cr; nextPutAll: ' */'.
s cr; cr; nextPut: $#.
insertPosition := s position.
self translateableInstructionSubclassesAndInstalledOptionsDo:
[:class | | abi |
s nextPutAll: 'if '.
(abi := InitializationOptions at: #ABI ifAbsent: []) ifNotNil:
[s nextPutAll: (abis addLast: abi); nextPutAll: ' && ('].
class identifyingPredefinedMacros
do: [:predefinedMacro| s nextPutAll: 'defined('; nextPutAll: predefinedMacro; nextPut: $)]
separatedBy: [s nextPutAll: ' || '].
abi ifNotNil: [s nextPut: $)].
s cr; cr; nextPutAll: '# include "'; nextPutAll: class moduleName; nextPutAll: '.c"'.
s cr; cr; nextPutAll: '#el'].
s nextPutAll: 'se'.
#( 'As yet no Cogit implementation appears to exist for your platform.'
'Consider implementing it, starting by adding a subclass of CogAbstractInstruction.') do:
[:msg| s cr; nextPutAll: '# error '; nextPutAll: msg].
s cr; nextPutAll: '#endif'; cr].
abis isEmpty ifTrue:
[^string].
defaultDef := String streamContents:
[:s|
s nextPutAll: '#if !'.
abis do: [:abi| s nextPutAll: abi] separatedBy: [s nextPutAll: ' && !'].
s cr; nextPutAll: '# define '; nextPutAll: abis first; nextPutAll: ' 1'; cr.
s nextPutAll: '#endif'; cr; cr].
^string copyReplaceFrom: insertPosition to: insertPosition - 1 with: defaultDef
]
{ #category : #accessing }
Cogit class >> generatorTable [
^generatorTable
]
{ #category : #'class initialization' }
Cogit class >> generatorTableFrom: anArray [
generatorTable := CArrayAccessor on: (Array new: 256).
anArray do:
[:tuple| | descriptor |
(descriptor := CogBytecodeDescriptor new)
numBytes: tuple first;
generator: tuple fourth;
isReturn: (tuple includes: #return);
hasUnsafeJump: (tuple includes: #hasUnsafeJump);
isMapped: ((tuple includes: #isMappedIfImmutability)
ifTrue: [self bindingOf: #IMMUTABILITY]
ifFalse: [tuple includes: #isMapped]);
isMappedInBlock: (tuple includes: #isMappedInBlock);
spanFunction: ((tuple includes: #branch)
ifTrue: [ tuple detect: [:thing| thing isSymbol and: [
thing numArgs = 2 or: [thing numArgs = 4]]]]);
isBranchTrue: (tuple includes: #isBranchTrue);
isBranchFalse: (tuple includes: #isBranchFalse);
isExtension: (tuple includes: #extension);
isInstVarRef: (tuple includes: #isInstVarRef); "for Spur"
is1ByteInstVarStore: (tuple includes: #is1ByteInstVarStore); "for Spur"
yourself.
PartialCompilation ifFalse: [
"As a hack to cut down on descriptor flags, use opcode to tag unusedBytecode for scanning.
Currently descriptors are exactly 16 bytes with all 8 flag bits used.
As another hack to eliminate a test in scanMethod mark unknowns as extensions."
descriptor generator == #unknownBytecode ifTrue:
[descriptor opcode: Nop; isExtension: true].
].
tuple do:
[:thing|
thing isSymbol ifTrue:
[(thing beginsWith: #needsFrame) ifTrue:
[descriptor needsFrameFunction: thing].
(CogRTLOpcodes classPool at: thing ifAbsent: []) ifNotNil:
[:opcode| descriptor opcode: opcode]]].
tuple last isInteger
ifTrue: [descriptor stackDelta: tuple last]
ifFalse:
[descriptor needsFrameFunction ifNotNil:
[self error: 'frameless block bytecodes must specify a stack delta']].
tuple second to: tuple third do:
[:index|
generatorTable at: index put: descriptor]].
^generatorTable
]
{ #category : #accessing }
Cogit class >> guardPageSize [
^1024
]
{ #category : #translation }
Cogit class >> implicitReturnTypeFor: aSelector [
"Answer the return type for methods that don't have an explicit return."
^#void
]
{ #category : #'class initialization' }
Cogit class >> initializeAnnotationConstants [
"These form the method map for a cog method. The map defines which addresses
in a machine code method are ones with important functions, such as being a send
site or being a reference to a heap object. Each annotated instruction has a byte
in the map, and each byte in the map has two parts. In the least signficant bits are
a distance in codeGranularity units from the start of the method or the previous
map entry, except for the IsAnnotationExtension type. In the most signficant bits
are the type of annotation at the point reached. A null byte ends the map. The
first mapped location is a distance from the cmNoCheckEntryOffset.
The map occurs at the end of a method (*), in reverse, so that its start is found
by adding the method's block size. If the distance between two mapped
instructions will not fit in the displacement field then one or more displacement
entries are placed in the map to bridge the gap. There is a * 32 displacement
units type for spanning large gaps. The displacements are in codeGranularity
units so that processors like e.g. ARM, with 4-byte instructions, do not have overly
large maps. In [practice maps are very compact, but they should be as quick to
navigate as possible, and hence be as compact as possible.
There is only one kind of call annotation that serves for all calls from machine
code. There are several kinds of call, sends, super sends, calls of the generated
run-time, and direct calls of primitive functions in the interpreter. These need
different treatment at different times. For example, when the send cache is
flushed or the method zone is shrunk some sends must be unlinked and some
sends must be relocated. But to be able to parse bytecoded methods and match
their pcs with corresponding machine code pcs the map needs to differentiate
between sends and run-time calls.
Sends can be distinguished from run-time or direct primitive calls based on address;
only sends have their target between methodZoneBase and methodZone freeStart.
We used to distinguish normal sends from super sends based on alignment of
entry-point, because normal sends link to the checked entry-point, whereas super sends
link to the unchecked entry-point, and both entry points have different alignments.
But now we use the IsAnnotationExtension to label sends other than normal sends.
For these ``exotic'' sends there is both an IsAnnotationExtension annotation and an
IsSendCall annotation.
While run-time calls can be distinguished from direct primitive calls on the basis
of address there is no need to do so. They are merely calls to locations that
don't move during method zone compaction.
Absolute PC references are used for method references and counter references.
These are references from within a particular method to absolute pcs in that same
method that must be relocated when the method moves."
"self initializeAnnotationConstants"
AnnotationShift := 5.
IsDisplacementX2N := 0. "N.B. A 0 byte ends the map"
IsAnnotationExtension := 1. "Used to extend IsSendCall with different codes for exotic send types."
IsObjectReference := 2.
IsAbsPCReference := 3.
IsRelativeCall := 4.
HasBytecodePC := 5.
IsSendCall := 7.
"These are formed by combining IsSendCall and IsAnnotationExtension annotations."
IsSuperSend := 8.
IsDirectedSuperSend := BytecodeSetHasDirectedSuperSend ifTrue: [9].
IsDirectedSuperBindingSend := BytecodeSetHasDirectedSuperSend ifTrue: [10].
DisplacementMask := (1 << AnnotationShift) - 1.
DisplacementX2N := IsDisplacementX2N << AnnotationShift.
FirstAnnotation := IsObjectReference << AnnotationShift.
MaxX2NDisplacement := DisplacementMask << AnnotationShift.
MapEnd := 0.
AnnotationConstantNames := #( IsDisplacementX2N
IsAnnotationExtension
IsObjectReference
IsAbsPCReference
IsRelativeCall
HasBytecodePC
IsNSSendCall
IsSendCall
IsSuperSend
IsDirectedSuperSend
IsDirectedSuperBindingSend
IsNSSelfSend
IsNSDynamicSuperSend
IsNSImplicitReceiverSend).
AnnotationsWithBytecodePCs := #(HasBytecodePC
IsNSSendCall
IsSendCall
IsSuperSend
IsDirectedSuperSend
IsDirectedSuperBindingSend
IsNSSelfSend
IsNSDynamicSuperSend
IsNSImplicitReceiverSend),
{'IsRelativeCall:\HasBytecodePC' withCRs}
]
{ #category : #'class initialization' }
Cogit class >> initializeBytecodeTable [
"SimpleStackBasedCogit initializeBytecodeTableWith: Dictionary new"
"StackToRegisterMappingCogit initializeBytecodeTableWith: Dictionary new"
| initializer |
BytecodeSetHasDirectedSuperSend := BytecodeSetHasExtensions := false.
PartialCompilation := InitializationOptions at: #PartialCompilation ifAbsent: [ false ].
initializer := InitializationOptions
at: #bytecodeTableInitializer
ifAbsent: [ #initializeBytecodeTableForSistaV1 ].
"Now make sure all classes in the hierarchy have initialized to the same bytecode table."
(self withAllSuperclasses copyUpTo: Cogit) reverseDo: [ :cogitClass | "i.e. exclude Cogit"
cogitClass perform: initializer ]
]
{ #category : #'class initialization' }
Cogit class >> initializeCogMethodConstants [
CMMegamorphicIC := 1 + (CMPolymorphicIC := 1 + (CMMethod := 1 + (CMFree := 1)))
]
{ #category : #'class initialization' }
Cogit class >> initializeErrorCodes [
"External errors, returned to or from cog:selector:"
NotFullyInitialized := -1.
InsufficientCodeSpace := -2.
MethodTooBig := -4.
YoungSelectorInPIC := -5.
EncounteredUnknownBytecode := -6.
UnimplementedPrimitive := -7.
ShouldNotJIT := -8.
MaxNegativeErrorCode := ShouldNotJIT.
"Internal errors returned by generator routines to other generator routines"
BadRegisterSet := 1.
UnimplementedOperation := 2.
"Internal successes answered by CogObjectRepresentation to JIT, etc"
UnfailingPrimitive := 3. "Answered by a primitive generator for a primitive that will never fail"
CompletePrimitive := 4 "Answered by a primitive generator that does not bneed to fall back on the interpreter primitive except for an error code."
]
{ #category : #'class initialization' }
Cogit class >> initializeMiscConstants [
super initializeMiscConstants.
Debug := InitializationOptions at: #Debug ifAbsent: [false].
(InitializationOptions includesKey: #EagerInstructionDecoration)
ifTrue:
[EagerInstructionDecoration := InitializationOptions at: #EagerInstructionDecoration]
ifFalse:
[EagerInstructionDecoration ifNil:
[EagerInstructionDecoration := false]]. "speeds up single stepping but could lose fidelity"
ProcessorClass := InitializationOptions at: #ProcessorClass ifAbsentPut: [ UnicornProcessor ].
CogCompilerClass := self activeCompilerClass.
(CogCompilerClass withAllSuperclasses copyUpTo: CogAbstractInstruction) reverseDo:
[:compilerClass| compilerClass initialize; initializeAbstractRegisters].
self objectMemoryClass objectRepresentationClass initializeMiscConstants.
"Our criterion for which methods to JIT is literal count. The default value is 60 literals or less."
MaxLiteralCountForCompile := InitializationOptions at: #MaxLiteralCountForCompile ifAbsent: [60].
"we special-case 0, 1 & 2 argument sends, N is numArgs >= 3"
NumSendTrampolines := 4.
"Currently not even the ceImplicitReceiverTrampoline contains object references."
NumObjRefsInRuntime := 0.
"6 is a fine number for the max number of PCI entries. 8 is too large."
MaxCPICCases := 6.
"One variable defines whether in a block and whether in a vanilla or full block."
InFullBlock := 2.
"The MaxNumberOfAbstractOpcodes should fits in a 16 bit integer (e.g. CogBytecodeFixup's instructionIndex)."
MaxNumberOfAbstractOpcodes := 32768.
]
{ #category : #'class initialization' }
Cogit class >> initializeNumTrampolines [
NumTrampolines := self numTrampolines
+ self objectRepresentationClass numTrampolines
+ (BytecodeSetHasDirectedSuperSend ifTrue: [NumSendTrampolines * 2] ifFalse: [0])
]
{ #category : #'class initialization' }
Cogit class >> initializePrimitiveTable [
"Initialize the table of primitive generators. This does not include normal primitives implemented in the coInterpreter.
N.B. primitives that don't have an explicit arg count (the integer following the generator) may be variadic."
"SimpleStackBasedCogit initializePrimitiveTable"
MaxCompiledPrimitiveIndex := self objectRepresentationClass wordSize = 8
ifTrue: [659]
ifFalse: [222].
primitiveTable := CArrayAccessor on: (Array new: MaxCompiledPrimitiveIndex + 1).
self table: primitiveTable from:
#( "Integer Primitives (0-19)"
(1 genPrimitiveAdd 1)
(2 genPrimitiveSubtract 1)
(3 genPrimitiveLessThan 1)
(4 genPrimitiveGreaterThan 1)
(5 genPrimitiveLessOrEqual 1)
(6 genPrimitiveGreaterOrEqual 1)
(7 genPrimitiveEqual 1)
(8 genPrimitiveNotEqual 1)
(9 genPrimitiveMultiply 1)
(10 genPrimitiveDivide 1)
(11 genPrimitiveMod 1)
(12 genPrimitiveDiv 1)
(13 genPrimitiveQuo 1)
(14 genPrimitiveBitAnd 1)
(15 genPrimitiveBitOr 1)
(16 genPrimitiveBitXor 1)
(17 genPrimitiveBitShift 1)
"(18 primitiveMakePoint)"
"(19 primitiveFail)" "Guard primitive for simulation -- *must* fail"
"LargeInteger Primitives (20-39)"
"(20 primitiveFail)"
"(21 primitiveAddLargeIntegers)"
"(22 primitiveSubtractLargeIntegers)"
"(23 primitiveLessThanLargeIntegers)"
"(24 primitiveGreaterThanLargeIntegers)"
"(25 primitiveLessOrEqualLargeIntegers)"
"(26 primitiveGreaterOrEqualLargeIntegers)"
"(27 primitiveEqualLargeIntegers)"
"(28 primitiveNotEqualLargeIntegers)"
"(29 primitiveMultiplyLargeIntegers)"
"(30 primitiveDivideLargeIntegers)"
"(31 primitiveModLargeIntegers)"
"(32 primitiveDivLargeIntegers)"
"(33 primitiveQuoLargeIntegers)"
"(34 primitiveBitAndLargeIntegers)"
"(35 primitiveBitOrLargeIntegers)"
"(36 primitiveBitXorLargeIntegers)"
"(37 primitiveBitShiftLargeIntegers)"
"Float Primitives (38-59)"
"(38 genPrimitiveFloatAt)"
"(39 genPrimitiveFloatAtPut)"
(40 genPrimitiveAsFloat 0)
(41 genPrimitiveFloatAdd 1)