author | Claus Gittinger <cg@exept.de> |
Fri, 10 Mar 2006 10:57:47 +0100 | |
changeset 9260 | 44978d675f85 |
parent 8913 | b9498d27a554 |
child 9394 | f085cd1af3e4 |
permissions | -rw-r--r-- |
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" |
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COPYRIGHT (c) 1994 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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"{ Package: 'stx:libbasic' }" |
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Object subclass:#ExecutableFunction |
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instanceVariableNames:'code*' |
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classVariableNames:'' |
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poolDictionaries:'' |
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category:'Kernel-Methods' |
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! |
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!ExecutableFunction class methodsFor:'documentation'! |
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copyright |
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" |
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COPYRIGHT (c) 1994 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 |
|
31 |
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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This is an abstract class, to merge common attributes of all kinds of |
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executable code objects; i.e. non-ST functions, Blocks and Methods |
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and whatever there might be in the future. |
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Instances of ExecutableCode are not meant to be created by user code - |
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the compilers create instances of Method & Block, while compiling. |
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(the VM would not even know what to do with such an instance, and triggered |
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and exception, if ever encountered during block/method execution). |
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NOTICE: layout known by runtime system and compiler - do not change |
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[Instance variables:] |
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code <not_an_object> the function pointer to the machine code. |
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Not accessable from smalltalk code. |
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(notice the '*' in the instVarNames definition) |
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[Class variables:] |
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ExecutionErrorSignal parent of all execution errors |
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(not raised itself) |
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InvalidCodeSignal codeObject is not executable |
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[author:] |
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Claus Gittinger |
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" |
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! ! |
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!ExecutableFunction class methodsFor:'queries'! |
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isBuiltInClass |
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"return true if this class is known by the run-time-system. |
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Here, true is returned for myself, false for subclasses." |
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^ self == ExecutableFunction |
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"Modified: 23.1.1997 / 13:47:58 / cg" |
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! ! |
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!ExecutableFunction methodsFor:'accessing'! |
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code |
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"return the code field. This is not an object but the address of the machine instructions. |
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Therefore an integer representing the code-address is returned" |
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%{ /* NOCONTEXT */ |
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unsigned INT addr; |
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if (__INST(code_) != nil) { |
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RETURN (__MKEXTERNALADDRESS(__INST(code_))); |
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#ifdef OLD |
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addr = (unsigned INT)__INST(code_); |
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if (addr <= _MAX_INT) { |
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RETURN ( __mkSmallInteger(addr) ); |
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} |
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RETURN ( __MKUINT(addr)); |
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#endif |
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} |
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%}. |
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^ nil |
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! |
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instVarAt:index |
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"have to catch instVar access to code - since its no object" |
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(index == 1) ifTrue:[^ self code]. |
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^ super instVarAt:index |
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! |
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instVarAt:index put:value |
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"have to catch instVar access to code - since its no object" |
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(index == 1) ifTrue:[^ self code:value]. |
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^ super instVarAt:index put:value |
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! ! |
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!ExecutableFunction methodsFor:'binary storage'! |
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readBinaryContentsFrom: stream manager: manager |
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"make certain, that no invalid function addresses are created." |
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super readBinaryContentsFrom: stream manager: manager. |
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self code:nil. |
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! ! |
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!ExecutableFunction methodsFor:'error handling'! |
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invalidCode |
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"{ Pragma: +optSpace }" |
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"this error is triggered by the interpreter when something is wrong |
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with the code object (any error not handled by Method-signals). |
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In this case, the VM sends this to the bad method/block (the receiver). |
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Can only happen when the Compiler/runtime system is broken or |
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someone played around." |
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^ InvalidCodeError raise. |
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"Modified: 4.11.1996 / 22:47:21 / cg" |
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! ! |
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!ExecutableFunction methodsFor:'printing & storing'! |
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printOn:aStream |
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"append a printed representation of the receiver to aStream" |
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|addr| |
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addr := self code. |
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addr isNil ifTrue:[^ super printOn:aStream]. |
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aStream nextPutAll:self class name; nextPutAll:'(address: 0x'. |
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addr address printOn:aStream base:16. |
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aStream nextPut:$) |
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"Modified: / 22.4.1996 / 16:36:05 / cg" |
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"Modified: / 20.1.1998 / 14:10:46 / stefan" |
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! |
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printStringForBrowserWithSelector:selector |
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"return a printString to represent myself to the user in a browser." |
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^ self printStringForBrowserWithSelector:selector inClass:nil |
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! |
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printStringForBrowserWithSelector:selector inClass:aClass |
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"return a printString to represent myself to the user in a browser." |
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^ selector |
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! ! |
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!ExecutableFunction methodsFor:'private-accessing'! |
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code:anAddress |
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"set the code field - DANGER ALERT. |
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This is not an object but the address of the machine instructions. |
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Therefore the argument must be an integer representing this address. |
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You can crash Smalltalk very badly when playing around here ... |
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This method is for compiler support and very special cases (debugging) only |
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- do not use" |
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%{ /* NOCONTEXT */ |
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if (__isExternalAddress(anAddress)) { |
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__INST(code_) = (OBJ)(__externalAddressVal(anAddress)); |
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} else { |
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if (__isSmallInteger(anAddress)) |
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__INST(code_) = (OBJ)(__intVal(anAddress)); |
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else { |
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if (anAddress == nil) { |
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__INST(code_) = nil; |
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} else { |
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__INST(code_) = (OBJ)(__longIntVal(anAddress)); |
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} |
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} |
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} |
202 |
%} |
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! ! |
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!ExecutableFunction methodsFor:'queries'! |
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category |
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"return the category of this codeObject. |
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Return nil here, to alow alien codeObjects to be handled by the |
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browsers." |
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|
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^ nil |
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"Created: 16.4.1996 / 16:31:15 / cg" |
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! |
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216 |
|
3932 | 217 |
hasCode |
5459 | 218 |
"return true, if this codeObject has machinecode to execute." |
3932 | 219 |
%{ |
220 |
if (__INST(code_)) { |
|
221 |
RETURN (true); |
|
222 |
} |
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5459 | 223 |
%}. |
224 |
^ false |
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3932 | 225 |
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226 |
"Created: / 13.11.1998 / 23:13:29 / cg" |
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227 |
! |
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228 |
||
5534 | 229 |
hasResource |
230 |
"return true, if this codeObject has a resource (false here - only real methods have)." |
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231 |
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232 |
^ false |
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233 |
! |
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234 |
||
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isBreakpointed |
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"return true, if this is a wrapper method for a breakpoint. |
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False is returned here - this method is redefined in WrappedMethod" |
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238 |
|
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239 |
^ false |
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240 |
|
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241 |
"Created: 7.4.1997 / 17:24:40 / cg" |
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242 |
! |
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243 |
|
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244 |
isExecutable |
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245 |
"return true, if this codeObject is executable." |
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246 |
|
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247 |
self isInvalid ifTrue:[^ false]. |
3932 | 248 |
^ self hasCode |
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249 |
|
3932 | 250 |
"Created: / 16.4.1996 / 20:13:32 / cg" |
251 |
"Modified: / 13.11.1998 / 23:16:32 / cg" |
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252 |
! |
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253 |
|
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254 |
isInvalid |
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255 |
"return true, if this codeObject is invalidated. |
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256 |
Return false here, to alow alien codeObjects to be handled by the |
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parents:
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|
257 |
browsers." |
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258 |
|
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259 |
^ false |
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260 |
|
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261 |
"Created: 16.4.1996 / 16:31:42 / cg" |
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262 |
! |
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changeset
|
263 |
|
3924 | 264 |
isJavaMethod |
265 |
^ false |
|
266 |
||
267 |
"Created: / 10.11.1998 / 18:26:44 / cg" |
|
268 |
! |
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269 |
||
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270 |
isLazyMethod |
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271 |
"return true, if this is a lazy method. |
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272 |
False is returned here - this method is redefined in LazyMethod" |
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273 |
|
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274 |
^ false |
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275 |
|
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276 |
"Created: 16.4.1996 / 16:32:11 / cg" |
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277 |
"Modified: 16.4.1996 / 16:32:36 / cg" |
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278 |
! |
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279 |
|
5936 | 280 |
isObsolete |
281 |
^ false |
|
282 |
! |
|
283 |
||
2536 | 284 |
isTimed |
285 |
"return true, if this is a wrapper method for a time measurement. |
|
286 |
False is returned here - this method is redefined in WrappedMethod" |
|
287 |
||
288 |
^ false |
|
289 |
||
290 |
"Created: 11.4.1997 / 17:06:32 / cg" |
|
291 |
! |
|
292 |
||
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293 |
isTraced |
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294 |
"return true, if this is a wrapper method for a trace point. |
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295 |
False is returned here - this method is redefined in WrappedMethod" |
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|
296 |
|
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|
297 |
^ false |
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|
298 |
|
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|
299 |
"Created: 7.4.1997 / 17:24:50 / cg" |
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300 |
! |
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|
301 |
|
1195
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302 |
isUnloaded |
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303 |
"return true, if the objects machine code has been unloaded |
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304 |
from the system (i.e. it is not executable)." |
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305 |
|
3932 | 306 |
^ self hasCode not |
1195
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307 |
|
3932 | 308 |
"Created: / 16.4.1996 / 20:15:52 / cg" |
309 |
"Modified: / 13.11.1998 / 23:19:52 / cg" |
|
1195
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310 |
! |
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|
311 |
|
1190
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312 |
isWrapped |
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313 |
"return true, if this is a wrapper method. |
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314 |
False is returned here - this method is redefined in WrappedMethod" |
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|
315 |
|
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316 |
^ false |
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|
317 |
|
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318 |
"Created: 16.4.1996 / 16:33:24 / cg" |
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|
319 |
! |
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|
320 |
|
5904 | 321 |
messagesSent |
322 |
^ #() "/ actually: unknown here in this abstract class |
|
323 |
! |
|
324 |
||
325 |
messagesSentToSelf |
|
326 |
^ #() "/ actually: unknown here in this abstract class |
|
327 |
! |
|
328 |
||
1190
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329 |
privacy |
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|
330 |
"return a symbol describing the methods access rights (privacy); |
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|
331 |
Currently, this is one of #private, #protected, #public or #ignored. |
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|
332 |
|
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|
333 |
Here we unconditionally return #public, to allow alien code objects |
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|
334 |
to be handled by the browsers." |
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|
335 |
|
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|
336 |
^ #public |
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|
337 |
|
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|
338 |
"Created: 16.4.1996 / 16:35:18 / cg" |
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|
339 |
! |
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|
340 |
|
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|
341 |
referencesGlobal:aGlobalSymbol |
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|
342 |
"return true, if this method references the global |
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|
343 |
bound to aGlobalSymbol. |
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|
344 |
Return false (we dont know) here, to allow alien code objects to be |
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|
345 |
handled by the browsers." |
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|
346 |
|
8464 | 347 |
^ false |
1190
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|
348 |
|
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|
349 |
"Created: 16.4.1996 / 16:37:48 / cg" |
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|
350 |
! |
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changeset
|
351 |
|
4977 | 352 |
referencesGlobalMatching:aMatchPattern |
353 |
"return true, if this method references a global |
|
354 |
whose name matches aMatchPattern. |
|
355 |
Return false (we dont know) here, to allow alien code objects to be |
|
356 |
handled by the browsers." |
|
357 |
||
8464 | 358 |
^ false |
4977 | 359 |
|
360 |
"Created: / 9.11.1999 / 16:58:48 / cg" |
|
361 |
! |
|
362 |
||
5533 | 363 |
referencesLiteral:aLiteral |
5537 | 364 |
"return true, if this executable references the literal directly (i.e. a flat search). |
5533 | 365 |
Return false (we dont know) here, to allow alien code objects to be |
366 |
handled by the browsers." |
|
367 |
||
8464 | 368 |
^ false |
5537 | 369 |
|
370 |
"Modified: / 18.8.2000 / 21:18:43 / cg" |
|
5533 | 371 |
! |
372 |
||
373 |
refersToLiteral:aLiteral |
|
5537 | 374 |
"return true, if this executable references the literal directly or indirectly (i.e. a deep search). |
5533 | 375 |
Return false (we dont know) here, to allow alien code objects to be |
376 |
handled by the browsers." |
|
377 |
||
8464 | 378 |
^ false |
5537 | 379 |
|
380 |
"Modified: / 18.8.2000 / 21:18:03 / cg" |
|
5533 | 381 |
! |
382 |
||
383 |
resources |
|
384 |
^ nil |
|
385 |
||
386 |
"Created: / 3.11.1997 / 09:09:01 / cg" |
|
387 |
! |
|
388 |
||
1190
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changeset
|
389 |
sends:aSelectorSymbol |
5533 | 390 |
"return true, if this code object contains a message-send with aSelectorSymbol as selector. |
1190
4ad1c8d6d94d
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changeset
|
391 |
- due to the simple check in the literal array, also simple uses |
4ad1c8d6d94d
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changeset
|
392 |
of aSelectorSymbol as symbol will return true. |
4ad1c8d6d94d
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changeset
|
393 |
Should ask compiler, if there is really a send." |
4ad1c8d6d94d
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changeset
|
394 |
|
5533 | 395 |
^ self referencesLiteral:aSelectorSymbol |
1190
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|
396 |
|
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changeset
|
397 |
"Created: 16.4.1996 / 16:35:53 / cg" |
5533 | 398 |
! |
399 |
||
400 |
usedGlobals |
|
401 |
"return a collection with the global names referred to by the receiver. |
|
402 |
Uses Parser to parse methods source and extract them." |
|
403 |
||
404 |
^ #() |
|
1190
4ad1c8d6d94d
moved & added some query methods (from method) to upper abstract classes
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diff
changeset
|
405 |
! ! |
4ad1c8d6d94d
moved & added some query methods (from method) to upper abstract classes
Claus Gittinger <cg@exept.de>
parents:
1180
diff
changeset
|
406 |
|
1180
7f4a68385ac7
only ExecutableFunction is fixed - subclasses may look different
Claus Gittinger <cg@exept.de>
parents:
1133
diff
changeset
|
407 |
!ExecutableFunction class methodsFor:'documentation'! |
7f4a68385ac7
only ExecutableFunction is fixed - subclasses may look different
Claus Gittinger <cg@exept.de>
parents:
1133
diff
changeset
|
408 |
|
7f4a68385ac7
only ExecutableFunction is fixed - subclasses may look different
Claus Gittinger <cg@exept.de>
parents:
1133
diff
changeset
|
409 |
version |
9260 | 410 |
^ '$Header: /cvs/stx/stx/libbasic/ExecutableFunction.st,v 1.53 2006-03-10 09:57:47 cg Exp $' |
1180
7f4a68385ac7
only ExecutableFunction is fixed - subclasses may look different
Claus Gittinger <cg@exept.de>
parents:
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diff
changeset
|
411 |
! ! |