"

 COPYRIGHT (c) 2006 by eXept Software AG

              All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

"{ Package: 'stx:libcomp' }"

"{ NameSpace: Smalltalk }"

ByteCodeCompiler subclass:#InstrumentingCompiler

	instanceVariableNames:'method methodEntryInfo blockInvocationInfo'

	classVariableNames:''

	poolDictionaries:''

	category:'System-Compiler-Instrumentation'

!

InstrumentationInfo subclass:#StatementExecutionInfo

	instanceVariableNames:'startPosition endPosition count'

	classVariableNames:''

	poolDictionaries:''

	privateIn:InstrumentingCompiler

!

InstrumentingCompiler::StatementExecutionInfo subclass:#StatementExecutionInfoForCoverageInAlreadyEnteredState

	instanceVariableNames:''

	classVariableNames:''

	poolDictionaries:''

	privateIn:InstrumentingCompiler::StatementExecutionInfo

!

InstrumentingCompiler::StatementExecutionInfo subclass:#StatementExecutionInfoInAlreadyEnteredState

	instanceVariableNames:''

	classVariableNames:''

	poolDictionaries:''

	privateIn:InstrumentingCompiler::StatementExecutionInfo

!

InstrumentationInfo subclass:#MethodInvocationInfo

	instanceVariableNames:'count recursiveEntry infoPerReceiverClass'

	classVariableNames:''

	poolDictionaries:''

	privateIn:InstrumentingCompiler

!

Object subclass:#MethodInvocationInfoPerReceiverClass

	instanceVariableNames:'infoPerSendingMethod'

	classVariableNames:''

	poolDictionaries:''

	privateIn:InstrumentingCompiler::MethodInvocationInfo

!

Object subclass:#MethodInvocationInfoPerSendingMethod

	instanceVariableNames:'countPerSendersClass invokedViaPerform'

	classVariableNames:''

	poolDictionaries:''

	privateIn:InstrumentingCompiler::MethodInvocationInfo::MethodInvocationInfoPerReceiverClass

!

InstrumentingCompiler::MethodInvocationInfo subclass:#MethodInvocationInfoForCoverageInAlreadyEnteredState

	instanceVariableNames:''

	classVariableNames:''

	poolDictionaries:''

	privateIn:InstrumentingCompiler

!

InstrumentingCompiler::MethodInvocationInfo subclass:#MethodInvocationInfoInAlreadyEnteredState

	instanceVariableNames:''

	classVariableNames:''

	poolDictionaries:''

	privateIn:InstrumentingCompiler

!

InstrumentingCompiler::StatementExecutionInfo subclass:#VariableAccessExecutionInfo

	instanceVariableNames:''

	classVariableNames:''

	poolDictionaries:''

	privateIn:InstrumentingCompiler

!

InstrumentingCompiler::StatementExecutionInfo subclass:#BlockExecutionInfo

	instanceVariableNames:''

	classVariableNames:''

	poolDictionaries:''

	privateIn:InstrumentingCompiler

!

InstrumentingCompiler::BlockExecutionInfo subclass:#BlockExecutionInfoForCoverageInAlreadyEnteredState

	instanceVariableNames:''

	classVariableNames:''

	poolDictionaries:''

	privateIn:InstrumentingCompiler::BlockExecutionInfo

!

InstrumentingCompiler::BlockExecutionInfo subclass:#BlockExecutionInfoInAlreadyEnteredState

	instanceVariableNames:''

	classVariableNames:''

	poolDictionaries:''

	privateIn:InstrumentingCompiler::BlockExecutionInfo

!

InstrumentingCompiler::VariableAccessExecutionInfo subclass:#ReadAccessExecutionInfo

	instanceVariableNames:''

	classVariableNames:''

	poolDictionaries:''

	privateIn:InstrumentingCompiler

!

InstrumentingCompiler::VariableAccessExecutionInfo subclass:#WriteAccessExecutionInfo

	instanceVariableNames:''

	classVariableNames:''

	poolDictionaries:''

	privateIn:InstrumentingCompiler

!

!InstrumentingCompiler class methodsFor:'documentation'!

copyright

"

 COPYRIGHT (c) 2006 by eXept Software AG

              All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

!

documentation

"

    an experiment - recompile classes using this compiler adds instrumentation code.

    This remembers who calls a method from where (methodInvocationInfo) what the receiver's types are

    (inherited classes) and how often basic blocks (blockExecutionInfo) and statements 

    (statementExecutionInfo) are invoked .

    The who-calls and receiver type info may produce some overhead, which can be avoided by 

    using the somewhat more naive InstrumentingForSimpleCoverageCompiler (that is what people are

    used to from the C/Java world, anyway).

    From the first bulk, we can compute the inheritanceCoverage info (which methods have been called for which

    subclass) in addition to the known line and block coverages.

"

! !

!InstrumentingCompiler class methodsFor:'compilation-public'!

compileClass:aClass

    "compile all methods of aClass with instrumentation"

    aClass instAndClassMethodsDo:[:eachMethod |

        self compileMethod:eachMethod

    ].

!

compileMethod:aMethod

    "compile a single method with instrumentation"

    Class withoutUpdatingChangesDo:[

        Class packageQuerySignal answer: aMethod package do:[

            self 

                compile:(aMethod source)

                forClass:(aMethod mclass) 

                inCategory:(aMethod category)

        ]

    ]

    "Modified: / 28-07-2013 / 16:59:36 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

compilePackage:aPackageID

    "compile all classes of a package instrumentation"

    Smalltalk allClassesInPackage:aPackageID do:[:eachClass |

        self compileClass:eachClass

    ].

    "

     InstrumentingCompiler compilePackage:'exept:workflow'.

     InstrumentingCompiler compilePackage:'exept:expecco'.

    "

!

compilePackages:aCollectionOfPackageIDs

    "compile all classes of some packages with instrumentation"

    aCollectionOfPackageIDs do:[:eachPackage |

        self compilePackage:eachPackage

    ].

    "

     InstrumentingCompiler compilePackages:#( 'exept:workflow' 'exept:expecco' ).

    "

! !

!InstrumentingCompiler class methodsFor:'special'!

allInstrumentedMethods

    ^ InstrumentedMethod allInstances 

    "

     self allInstrumentedMethods

    "

    "Modified: / 27-04-2010 / 13:37:51 / cg"

!

callersOf:aMethod do:aBlock

    "enumerate all callers of aMethod into a block"

    |info|

    info := aMethod methodInvocationInfo.

    info notNil ifTrue:[

        info callingMethodsDo:[:callingMethod |

            aBlock value:callingMethod

        ]

    ]

    "Modified: / 27-04-2010 / 13:35:00 / cg"

    "Modified (comment): / 07-08-2011 / 15:08:33 / cg"

!

isInstrumented:aMethod

    ^ aMethod isInstrumented

    "

     self methodInfoOf:aMethod

    "

    "Modified: / 27-04-2010 / 13:35:21 / cg"

!

methodInfoOf:aMethod

    <resource: #obsolete>

    self obsoleteMethodWarning:'please use Method >> methodInvocationInfo'.

    ^ aMethod methodInvocationInfo

    "

     self methodInfoOf:aMethod

    "

    "Modified: / 27-04-2010 / 13:37:31 / cg"

!

methodInvocationInfoOf:aMethod

    <resource: #obsolete>

    self obsoleteMethodWarning:'please use method>>methodInvocationInfo'.

    ^ aMethod methodInvocationInfo

    "

     self methodInfoOf:aMethod

    "

    "Created: / 27-04-2010 / 12:28:56 / cg"

    "Modified: / 27-04-2010 / 13:34:36 / cg"

! !

!InstrumentingCompiler methodsFor:'code generation helpers'!

addBlockCounterTo:aBlockNode

    "called by the compiler to instrument a block node"

    |countCode blockEntryInfo|

    blockInvocationInfo isNil ifTrue:[

        blockInvocationInfo := OrderedCollection new.

    ].

    blockEntryInfo := self blockExecutionInfoInstance.

    blockEntryInfo startPosition:aBlockNode startPosition endPosition:aBlockNode endPosition.

"/    Transcript show:aBlockNode startPosition;

"/     show:' -> ';

"/     showCR: aBlockNode endPosition.

    blockInvocationInfo add:blockEntryInfo.

    countCode := 

        StatementNode 

            expression:(MessageNode 

                            receiver:(ConstantNode value:blockEntryInfo)

                            selector:#entry:

                            arg:(VariableNode type:#ThisContext context:contextToEvaluateIn)).

    aBlockNode isEmptyBlock ifTrue:[

        "/ q: are we interested in empty blocks ?

        countCode nextStatement:(StatementNode expression:(ConstantNode value:nil)).

        aBlockNode statements:countCode.

    ] ifFalse:[

        countCode nextStatement:aBlockNode statements.

        aBlockNode statements:countCode.

    ].

    "Modified: / 21-08-2011 / 16:02:52 / cg"

!

addBlockCountersToEachBlockIn:aCollection

    "called by the compiler to instrument a collection of block nodes"

    aCollection do:[:eachNode |

        eachNode isBlockNode ifTrue:[

            self addBlockCounterTo:eachNode

        ]

    ].

    "Created: / 27-04-2010 / 11:47:56 / cg"

!

createMethod

    "called by the compiler to instatiate a new method instance"

    method := super createMethod.

    methodEntryInfo notNil ifTrue:[

        methodEntryInfo owningMethod:method    

    ].

    blockInvocationInfo notNil ifTrue:[

        blockInvocationInfo do:[:eachInfo | eachInfo owningMethod:method]

    ].

    ^ method

    "Modified: / 27-04-2010 / 14:04:50 / cg"

!

methodClass

    "called by the compiler to ask for the method instance's class"

    ^ InstrumentedMethod

    "Created: / 27-04-2010 / 12:17:22 / cg"

!

statementCounterBefore:aStatementNode

    "called by the compiler to instrument a statement node (head of a basic block)"

    |countCode statementEntryInfo|

    blockInvocationInfo isNil ifTrue:[

        blockInvocationInfo := OrderedCollection new.

    ].

    statementEntryInfo := self statementExecutionInfoInstance.

    statementEntryInfo startPosition:aStatementNode startPosition.

    blockInvocationInfo add:statementEntryInfo.

    countCode := 

        StatementNode 

            expression:(MessageNode 

                            receiver:(ConstantNode value:statementEntryInfo)

                            selector:#entry:

                            arg:(VariableNode type:#ThisContext context:contextToEvaluateIn)).

    countCode nextStatement:aStatementNode.

    ^ countCode

    "Modified: / 07-08-2011 / 15:32:45 / cg"

! !

!InstrumentingCompiler methodsFor:'code generation hooks'!

assignmentRewriteHookFor:anAssignmentNode

    "invoked whenever an assignment node has been generated"

    ^ anAssignmentNode

    "Created: / 30-09-2011 / 12:28:09 / cg"

!

blockNodeRewriteHookFor:aBlockNode

    "invoked whenever a block node has been generated"

    "/ add a counter for the block

    self addBlockCounterTo:aBlockNode.

    ^ aBlockNode

    "Created: / 28-04-2010 / 14:21:27 / cg"

!

messageNodeRewriteHookFor:aMessageNode

    "invoked whenever a message send node has been generated"

"/ see blockNodeRewriter...

"/    "/ argument could be a constantNode (due to contant-folding optimization)

"/    aMessageNode isConstant ifTrue:[^ aMessageNode].

"/    (

"/        #( 

"/            ifTrue: 

"/            ifFalse:

"/            ifTrue:ifFalse: 

"/            ifFalse:ifTrue: 

"/        )

"/        includes:aMessageNode selector

"/    ) ifTrue:[

"/        "/ add a counter for the block

"/        self addBlockCountersToEachBlockIn:(aMessageNode arguments)

"/    ].

    ^ aMessageNode

    "Created: / 27-04-2010 / 11:43:22 / cg"

    "Modified: / 28-04-2010 / 14:22:05 / cg"

    "Modified (comment): / 30-09-2011 / 12:16:56 / cg"

!

startCodeGenerationHookOn:codeStream

    "invoked before code is generated"

    methodEntryInfo := self methodInvocationInfoInstance.

    (StatementNode 

        expression:(MessageNode 

                        receiver:(ConstantNode value:methodEntryInfo)

                        selector:#entry:

                        arg:(VariableNode type:#ThisContext context:contextToEvaluateIn)))

            codeForSideEffectOn:codeStream inBlock:nil for:self.

    "Modified: / 07-08-2011 / 15:34:09 / cg"

    "Modified (comment): / 30-09-2011 / 12:16:05 / cg"

!

statementListRewriteHookFor:firstStatementArg

    "invoked whenever a statement list node has been generated"

    "/ care for blocks which return...

    |thisStatement prevStatement countStatement mustInsertExecutionInfo statementInfo firstStatement |

    mustInsertExecutionInfo := false.

    prevStatement := nil.

    thisStatement := firstStatementArg.

    thisStatement isNil ifTrue:[^ firstStatementArg].

    firstStatement := self statementCounterBefore:thisStatement.

    statementInfo := firstStatement expression receiver value. 

    statementInfo endPosition: thisStatement endPosition.

    [true] whileTrue:[

        mustInsertExecutionInfo ifTrue:[

            "/ prev-stat had a return in it (a block with a return);

            "/ insert a statement-entry here.

            thisStatement notNil ifTrue:[

                countStatement := self statementCounterBefore:thisStatement.

                statementInfo := countStatement expression receiver value.

                statementInfo endPosition: thisStatement endPosition.

                prevStatement nextStatement:countStatement.

                mustInsertExecutionInfo := false.

                prevStatement := countStatement.

            ]

        ].

        thisStatement isNil ifTrue:[ ^ firstStatement ].

        thisStatement isReturnNode ifFalse:[

            thisStatement containsReturn ifTrue:[

                mustInsertExecutionInfo := true    

            ]

        ].

        prevStatement := thisStatement.

        statementInfo notNil ifTrue:[

            statementInfo endPosition: prevStatement endPosition.

        ].

        thisStatement := thisStatement nextStatement.

    ].

    "Modified (comment): / 30-09-2011 / 12:15:52 / cg"

    "Modified: / 29-07-2013 / 00:11:03 / Jan Vrany <jan.vrany@fit.cvut.cz>"

!

variableReadRewriteHookFor:aVariableNode

    "invoked whenever a variable access node has been generated"

    ^ aVariableNode

    "Created: / 30-09-2011 / 12:27:47 / cg"

! !

!InstrumentingCompiler methodsFor:'redefinable'!

blockExecutionInfoInstance

    "one instance is generated for every block,

     and called at execution time with entry:"

    ^ BlockExecutionInfo new cleanInfoWithChange:false.

    "Created: / 07-08-2011 / 15:13:42 / cg"

!

methodInvocationInfoInstance

    "one instance is generated for every method,

     and called at execution time with entry:"

    ^ MethodInvocationInfo new.