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COPYRIGHT (c) 2010 by eXept Software AG
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All Rights Reserved
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This software is furnished under a license and may be used
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only in accordance with the terms of that license and with the
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inclusion of the above copyright notice. This software may not
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be provided or otherwise made available to, or used by, any
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other person. No title to or ownership of the software is
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hereby transferred.
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"
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"{ Package: 'stx:libcomp' }"
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Object variableSubclass:#InstrumentationContext
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instanceVariableNames:'inInstrumentedCode enabled'
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classVariableNames:'CachedProcessToInstrumentationContextMapping
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GlobalInstrumentationContext'
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poolDictionaries:''
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category:'System-Compiler-Instrumentation'
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!
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!InstrumentationContext class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 2010 by eXept Software AG
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All Rights Reserved
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This software is furnished under a license and may be used
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only in accordance with the terms of that license and with the
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inclusion of the above copyright notice. This software may not
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be provided or otherwise made available to, or used by, any
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other person. No title to or ownership of the software is
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hereby transferred.
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"
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!
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documentation
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"
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installed as a thread-local variable (instrumentationContext) by the
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beActiveIn:aProcess method, instances of me keep some meta state while
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instrumentation is ongoing.
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Especially, only in processes with a context are instrumentationInfo objects
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updated. This has two advantages:
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- it blocks recursive calls, while inside instrumentation code
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- it blocks instrumentation from other processes (so only test-code is instrumented)
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"
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! !
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!InstrumentationContext class methodsFor:'instance creation'!
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new
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"return an initialized instance"
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^ self basicNew initialize.
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! !
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!InstrumentationContext class methodsFor:'instance access'!
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current
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"the current context for this running thread.
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walks along the parent-process chain, up to a possible global context"
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^ self forProcess:(Processor activeProcess)
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"
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InstrumentationContext current
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"
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"Created: / 08-08-2011 / 14:44:11 / cg"
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!
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forProcess:aProcess
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"the context for this thread.
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walks along the parent-process chain, up to a possible global context"
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|p context|
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CachedProcessToInstrumentationContextMapping isNil ifTrue:[
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CachedProcessToInstrumentationContextMapping := WeakIdentityDictionary new.
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].
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context := CachedProcessToInstrumentationContextMapping at:aProcess ifAbsent:nil.
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context == 0 ifTrue:[ ^ nil]. "/ special entry for a known nil value
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context isNil ifTrue:[
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"/ future (need a faster parentProcess query)
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p := aProcess.
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[p notNil] whileTrue:[
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context := p environmentAt:#instrumentationContext ifAbsent:nil.
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context notNil ifTrue:[
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CachedProcessToInstrumentationContextMapping at:aProcess put:context.
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^ context
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].
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p := p parentProcess
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].
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CachedProcessToInstrumentationContextMapping at:aProcess put:(GlobalInstrumentationContext ? 0). "/ known to be nil
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context := GlobalInstrumentationContext.
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].
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^ context
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"
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InstrumentationContext current
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"
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"Created: / 17-08-2011 / 11:29:51 / cg"
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! !
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!InstrumentationContext class methodsFor:'running'!
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run:aBlock
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"run aBlock with instrumentation enabled"
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self new run:aBlock.
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"
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Smalltalk loadPackage:'exept:regression'.
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BTree withAllPrivateClasses
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do:[:cls | cls recompileUsingCompilerClass:InstrumentingCompiler].
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InstrumentationContext
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run:[ RegressionTests::BinaryTreeTester suite run ].
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(Tools::NewSystemBrowser open)
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switchToClass:BTree;
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showCoverageInformation value:true
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"
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"Created: / 08-08-2011 / 15:47:10 / cg"
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! !
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!InstrumentationContext class methodsFor:'utilities'!
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setInstrumentationContext:aContextOrNil in:aProcess
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"in order to keep the knowledge about which environment-variable is used
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at least local..."
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aProcess environmentAt:#instrumentationContext put:aContextOrNil
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"Created: / 17-08-2011 / 11:53:19 / cg"
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! !
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!InstrumentationContext methodsFor:'accessing'!
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enabled
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^ enabled
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!
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enabled:aBoolean
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enabled := aBoolean.
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"Modified (format): / 08-08-2011 / 14:47:12 / cg"
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!
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inInstrumentedCode
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^ inInstrumentedCode ? false
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"Modified: / 07-08-2011 / 16:57:15 / cg"
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!
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inInstrumentedCode:aBoolean
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inInstrumentedCode := aBoolean.
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"Modified (format): / 08-08-2011 / 19:43:19 / cg"
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! !
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!InstrumentationContext methodsFor:'initialization'!
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initialize
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"Invoked when a new instance is created."
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inInstrumentedCode := false.
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enabled := true.
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"/ super initialize. -- commented since inherited method does nothing
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"Modified: / 08-08-2011 / 15:44:59 / cg"
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! !
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!InstrumentationContext methodsFor:'installing'!
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beActiveIn:aProcess
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"become the current instrumentaion context for a process."
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self class setInstrumentationContext:self in:aProcess
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"
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InstrumentationContext new beActiveIn:(Processor activeProcess)
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"
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"Created: / 08-08-2011 / 14:46:09 / cg"
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! !
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!InstrumentationContext methodsFor:'queries'!
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enabledAndNotInInstrumentedCode
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^ enabled and:[ inInstrumentedCode not ]
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"Created: / 08-08-2011 / 15:44:30 / cg"
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! !
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!InstrumentationContext methodsFor:'running'!
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run:aBlock
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"run aBlock with instrumentation enabled"
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|activeProcess|
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activeProcess := Processor activeProcess.
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[
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self beActiveIn:activeProcess.
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aBlock value
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] ensure:[
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self class setInstrumentationContext:nil in:activeProcess
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].
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"Modified: / 17-08-2011 / 11:53:54 / cg"
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! !
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!InstrumentationContext class methodsFor:'documentation'!
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version
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^ '$Header: /cvs/stx/stx/libcomp/InstrumentationContext.st,v 1.3 2011-08-17 14:32:52 cg Exp $'
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!
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version_CVS
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^ '$Header: /cvs/stx/stx/libcomp/InstrumentationContext.st,v 1.3 2011-08-17 14:32:52 cg Exp $'
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! !
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