author | Claus Gittinger <cg@exept.de> |
Fri, 12 Jul 1996 15:54:39 +0200 | |
changeset 299 | 33a154508328 |
parent 263 | 3b21d0991eff |
child 302 | e5c0efc943e6 |
permissions | -rw-r--r-- |
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" |
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COPYRIGHT (c) 1995 by Claus Gittinger |
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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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Object subclass:#ObjectFileHandle |
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instanceVariableNames:'sysHandle1 sysHandle2 pathName moduleID handleType weakMethodRef |
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weakClassRefs weakFunctionRefs' |
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classVariableNames:'' |
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poolDictionaries:'' |
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category:'System-Compiler' |
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! |
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!ObjectFileHandle class methodsFor:'documentation'! |
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copyright |
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" |
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COPYRIGHT (c) 1995 by Claus Gittinger |
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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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not for public use - used by ObjectFileLoader to keep track of loaded modules, |
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associating objectFile names and moduleIDs to classes/methods. |
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This is required to be able to fixup classes, methods and function references |
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when an image is restarted and the dynamic objects are reloaded. |
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[see also:] |
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ExternalFunction |
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ObjectFileLoader |
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[author:] |
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Claus Gittinger |
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" |
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! |
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history |
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"Created: 14.9.1995 / 21:10:55 / claus" |
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"Modified: 14.9.1995 / 21:10:55 / claus" |
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"Modified: 12.7.1996 / 15:20:15 / cg" |
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! ! |
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!ObjectFileHandle methodsFor:'accessing'! |
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classes |
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"return the classes" |
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weakClassRefs isNil ifTrue:[^nil]. |
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^ weakClassRefs asArray |
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"Created: 14.9.1995 / 21:13:13 / claus" |
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! |
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classes:aCollectionOfClasses |
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"set the classes collection" |
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weakClassRefs := WeakArray withAll:aCollectionOfClasses. |
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weakClassRefs addDependent:self. |
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handleType := #classLibraryObject |
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"Created: 14.9.1995 / 21:13:13 / claus" |
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! |
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functions |
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"return the functions which were already extracted from the module." |
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weakFunctionRefs isNil ifTrue:[^nil]. |
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^ weakFunctionRefs asArray select:[:f | f notNil] |
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"Created: 12.7.1996 / 15:33:09 / cg" |
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"Modified: 12.7.1996 / 15:38:00 / cg" |
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! |
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method |
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"return the method" |
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weakMethodRef isNil ifTrue:[^ nil]. |
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^ weakMethodRef at:1 |
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"Created: 14.9.1995 / 21:13:13 / claus" |
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! |
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method:something |
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"set the method" |
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weakMethodRef := WeakArray with:something. |
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weakMethodRef addDependent:self. |
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handleType := #methodObject. |
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"Created: 14.9.1995 / 21:13:13 / claus" |
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! |
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moduleID |
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"return moduleID" |
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^ moduleID |
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"Created: 14.9.1995 / 21:13:12 / claus" |
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! |
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moduleID:something |
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"set moduleID" |
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moduleID := something. |
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"Created: 14.9.1995 / 21:13:12 / claus" |
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! |
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pathName |
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"return pathName" |
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^ pathName |
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! |
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pathName:something |
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"set pathName" |
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pathName := something. |
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"Created: 14.9.1995 / 21:13:12 / claus" |
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! |
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sysHandle1 |
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"return sysHandle1" |
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^ sysHandle1 |
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"Created: 14.9.1995 / 21:13:12 / claus" |
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! |
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sysHandle1:something |
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"set sysHandle1" |
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sysHandle1 := something. |
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! |
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sysHandle2 |
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"return sysHandle2" |
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^ sysHandle2 |
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! |
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sysHandle2:something |
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"set sysHandle2" |
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sysHandle2 := something. |
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"Created: 14.9.1995 / 21:13:12 / claus" |
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! ! |
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259 | 174 |
!ObjectFileHandle methodsFor:'change & update'! |
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update:something with:aParameter from:changedObject |
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"my method/class object was collected - unload the underlying objectfile" |
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self isObsolete ifTrue:[ |
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('OBJFLOADER: unloading ' , pathName , ' (method/classes were garbageCollected)') infoPrintNL. |
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ObjectFileLoader unloadObjectFile:pathName |
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]. |
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"Created: 5.12.1995 / 18:05:08 / cg" |
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! ! |
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!ObjectFileHandle methodsFor:'copying'! |
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postCopy |
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"flush module handles of the copy" |
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sysHandle1 := sysHandle2 := moduleID := nil |
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"Created: 5.12.1995 / 21:10:49 / cg" |
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"Modified: 25.4.1996 / 09:43:53 / cg" |
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! ! |
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!ObjectFileHandle methodsFor:'printing'! |
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printOn:aStream |
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"append a printed representation of the receiver to aStream" |
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aStream nextPutAll:self class name; nextPutAll:'(handle=<'. |
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sysHandle1 printOn:aStream. |
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aStream nextPutAll:' '. |
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sysHandle2 printOn:aStream. |
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aStream nextPutAll:'> path='''. |
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pathName printOn:aStream. |
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aStream nextPutAll:''' id='. |
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moduleID printOn:aStream. |
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aStream nextPutAll:' type='. |
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handleType printOn:aStream. |
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aStream nextPutAll:' method=<'. |
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self method printOn:aStream. |
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aStream nextPutAll:'> classes=<'. |
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self classes printOn:aStream. |
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aStream nextPutAll:'>'. |
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|
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aStream nextPutAll:')'. |
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259 | 221 |
"Modified: 25.4.1996 / 09:44:08 / cg" |
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! ! |
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141 | 224 |
!ObjectFileHandle methodsFor:'queries'! |
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getFunction:aString |
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"return a function object for an entry in the module represented by |
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the receiver." |
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|address f slot sz nW| |
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address := ObjectFileLoader getFunction:aString from:self. |
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address isNil ifTrue:[ |
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^ nil |
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]. |
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|
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weakFunctionRefs isNil ifTrue:[ |
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handleType := #functionObject. |
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f := ExternalFunction basicNew code:address. |
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f setName:aString moduleHandle:self. |
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weakFunctionRefs := WeakArray with:f. |
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^ f. |
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]. |
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|
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weakFunctionRefs nonNilElementsDo:[:anExternalFunction | |
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anExternalFunction code = address ifTrue:[ |
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^ anExternalFunction |
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] |
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]. |
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|
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f := ExternalFunction basicNew code:address. |
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f setName:aString moduleHandle:self. |
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|
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slot := weakFunctionRefs identityIndexOf:nil. |
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slot ~~ 0 ifTrue:[ |
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weakFunctionRefs at:slot put:f. |
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^ f. |
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]. |
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|
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sz := weakFunctionRefs size. |
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261 |
nW := WeakArray new:(sz + 2). |
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nW replaceFrom:1 to:sz with:weakFunctionRefs startingAt:1. |
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nW at:sz+1 put:f. |
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|
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weakFunctionRefs := nW. |
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^ f |
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|
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"Created: 12.7.1996 / 14:59:09 / cg" |
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"Modified: 12.7.1996 / 15:52:07 / cg" |
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! |
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|
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hasUndefinedSymbols |
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"return true, if the module has any undefined symbols. |
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The only system, which allows modules with undefined symbols to be |
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loaded is (currently) the linux a.out version." |
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|
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^ ObjectFileLoader hasUndefinedSymbolsIn:self |
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|
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"Created: 12.7.1996 / 14:59:09 / cg" |
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! |
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isClassLibHandle |
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"return true, if I am a handle for a class library" |
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^ handleType == #classLibraryObject |
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! |
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||
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isForCollectedObject |
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"return true, if my clases/method has already been garbage collected" |
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|
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handleType == #classLibraryObject ifTrue:[ |
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^ (weakClassRefs findFirst:[:x | x notNil]) == 0 |
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]. |
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handleType == #methodObject ifTrue:[ |
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^ (weakMethodRef at:1) isNil |
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]. |
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handleType == #functionObject ifTrue:[ |
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^ (weakFunctionRefs findFirst:[:x | x notNil]) == 0 |
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]. |
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|
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^ false |
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|
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"Created: 6.12.1995 / 17:46:58 / cg" |
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"Modified: 12.7.1996 / 15:42:38 / cg" |
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! |
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|
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isFunctionObjectHandle |
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"return true, if I am a handle for a c-code (or other) function object file" |
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|
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handleType := #functionObject |
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|
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"Modified: 12.7.1996 / 15:34:29 / cg" |
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"Created: 12.7.1996 / 15:35:33 / cg" |
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! |
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|
259 | 316 |
isMethodHandle |
317 |
"return true, if I am a handle for a single compiled method" |
|
318 |
||
319 |
^ handleType == #methodObject |
|
320 |
! |
|
321 |
||
141 | 322 |
isObsolete |
323 |
"return true, if my clases/method has already been removed from |
|
324 |
the image. I.e. if the object file can be unloaded without danger." |
|
325 |
||
154 | 326 |
moduleID notNil ifTrue:[ |
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handleType == #classLibraryObject ifTrue:[ |
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^ (weakClassRefs findFirst:[:x | x notNil]) == 0 |
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]. |
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handleType == #methodObject ifTrue:[ |
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^ (weakMethodRef at:1) isNil |
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]. |
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handleType == #functionObject ifTrue:[ |
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^ (weakFunctionRefs findFirst:[:x | x notNil]) == 0 |
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]. |
141 | 336 |
]. |
337 |
^ false |
|
299
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|
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"Modified: 12.7.1996 / 15:42:21 / cg" |
141 | 340 |
! ! |
341 |
||
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!ObjectFileHandle class methodsFor:'documentation'! |
148 | 343 |
|
344 |
version |
|
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^ '$Header: /cvs/stx/stx/libcomp/ObjectFileHandle.st,v 1.15 1996-07-12 13:54:39 cg Exp $' |
148 | 346 |
! ! |