author | jv |
Thu, 23 Sep 2010 13:52:13 +0000 | |
changeset 748 | da0840b7798c |
parent 747 | e44a9c203e2f |
child 749 | e898eaeff091 |
permissions | -rw-r--r-- |
454 | 1 |
" |
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COPYRIGHT (c) 1997 by eXept Software AG |
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All Rights Reserved |
454 | 4 |
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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:libjava' }" |
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Context variableSubclass:#JavaContext |
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instanceVariableNames:'exArg exPC byteCode constPool' |
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classVariableNames:'' |
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poolDictionaries:'' |
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category:'Languages-Java-Support' |
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! |
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!JavaContext class methodsFor:'documentation'! |
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copyright |
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" |
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COPYRIGHT (c) 1997 by eXept Software AG |
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All Rights Reserved |
454 | 30 |
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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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33 |
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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!JavaContext methodsFor:'ST context mimicri'! |
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arg1Index |
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"the java stack contains the receiver in a non-static |
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method, as slot 0. Therefore, the first arg is found at slot2 |
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if this is for a non-static method" |
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self method isStatic ifTrue:[ |
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^ 1 |
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]. |
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^ 2 |
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! |
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argAt:n |
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"return the i'th argument (1..nArgs)" |
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^ self at:(self arg1Index - 1 + n) |
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"Created: / 2.1.1998 / 17:54:13 / cg" |
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"Modified: / 2.1.1998 / 21:39:30 / cg" |
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! |
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argAt:n put:value |
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"change the i'th argument (1..nArgs)" |
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^ super argAt:(self arg1Index - 1 + n) put:value |
252 | 68 |
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"Created: / 2.1.1998 / 17:54:34 / cg" |
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"Modified: / 2.1.1998 / 21:35:19 / cg" |
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! |
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args |
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"return an array filled with the arguments of this context" |
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|n| |
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n := self numArgs. |
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n == 0 ifTrue:[ |
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"/ little optimization here - avoid creating empty containers |
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^ #() |
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]. |
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^ (Array new:n) replaceFrom:1 to:n with:self startingAt:(self arg1Index). |
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"Created: / 2.1.1998 / 17:54:57 / cg" |
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"Modified: / 2.1.1998 / 21:34:44 / cg" |
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! |
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argsAndVars |
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"return an array filled with the arguments and variables of this context" |
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|n| |
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n := self numArgs + self numVars. |
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n == 0 ifTrue:[ |
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"/ little optimization here - avoid creating empty containers |
98 |
^ #() |
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]. |
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^ (Array new:n) replaceFrom:1 to:n with:self startingAt:(self arg1Index). |
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"Created: / 2.1.1998 / 17:55:14 / cg" |
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"Modified: / 13.1.1998 / 15:44:56 / cg" |
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! |
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252 | 106 |
lineNumber |
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|nr pc| |
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156 | 108 |
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pc := self pc. |
43 | 110 |
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211 | 111 |
"/ 'ask line for pc:' print. pc printCR. |
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pc isNil ifTrue:[ |
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nr := self lineNumberFromMethod. |
114 |
nr notNil ifTrue:[ |
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^ nr |
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]. |
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" '-> 0 [a]' printCR. " |
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^0 |
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]. |
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nr := self method lineNumberForPC:pc. |
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nr isNil ifTrue:[ |
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nr := self lineNumberFromMethod. |
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nr notNil ifTrue:[ |
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^ nr |
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]. |
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" '-> 0 [b]' printCR. " |
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^ 0 |
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]. |
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"/ '-> ' print. nr printCR. |
210 | 131 |
^ nr. |
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252 | 133 |
"Created: / 1.5.1996 / 15:05:47 / cg" |
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"Modified: / 15.1.1998 / 15:25:29 / cg" |
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! |
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lineNumberFromMethod |
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|m| |
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m := self method. |
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m notNil ifTrue:[ |
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^ m lineNumber |
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]. |
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^ nil |
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"Created: / 4.1.1998 / 23:34:45 / cg" |
147 |
"Modified: / 4.1.1998 / 23:35:55 / cg" |
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! |
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method |
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"the method may be found in the interpreter temps ..." |
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method isJavaMethod ifTrue:[^ method]. |
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^ super method |
155 |
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"Created: / 1.5.1996 / 15:03:43 / cg" |
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"Modified: / 25.9.1999 / 23:26:40 / cg" |
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! |
159 |
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numArgs |
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"return the number of args. |
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Redefined since Java keeps the receiver of a non-static method |
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at local slot 1." |
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|n| |
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n := super numArgs. |
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self method isStatic ifFalse:[ |
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n := n - 1 |
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]. |
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^ n |
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"Created: / 2.1.1998 / 22:21:24 / cg" |
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! |
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numTemps |
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"return the number of temporary variables of the Method. |
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Redefined since Java keeps the receiver of a non-static method |
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at local slot 1." |
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|n| |
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n := self size - super numVars - super numArgs. |
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^ n |
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"Created: / 13.1.1998 / 16:52:32 / cg" |
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"Modified: / 13.1.1998 / 17:23:27 / cg" |
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! |
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numVars |
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"return the number of locals. |
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Redefined since Java keeps the receiver of a non-static method |
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at local slot 0 and holds the args as locals." |
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|n| |
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n := super numVars. |
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^ (n - self numArgs) max:0 |
261 | 199 |
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"Created: / 13.1.1998 / 17:03:08 / cg" |
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"Modified: / 13.1.1998 / 17:25:16 / cg" |
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! |
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pc |
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lineNr isNil ifTrue:[^ nil]. |
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^ lineNr bitAnd:16rFFFF |
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"Created: / 4.1.1998 / 23:33:48 / cg" |
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"Modified: / 10.11.1998 / 13:20:12 / cg" |
210 |
! |
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quickLineNumber |
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"the lineNumber - without decompiling" |
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^ self method quickLineNumberForPC:self pc |
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"Created: / 10.11.1998 / 14:20:30 / cg" |
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! |
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selector |
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"the selector can be extracted from the method. |
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the method may be found in the interpreter temps ..." |
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|s m| |
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selector isNil ifTrue:[ |
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m := self method. |
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m notNil ifTrue:[ |
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^ m name |
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] |
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]. |
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^ super selector |
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"Modified: / 30.12.1997 / 17:22:06 / cg" |
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"Created: / 30.12.1997 / 17:23:47 / cg" |
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125 | 236 |
! |
237 |
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setPC:newPC |
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lineNr := newPC |
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"Created: / 5.1.1998 / 00:09:02 / cg" |
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261 | 242 |
! |
243 |
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temporaries |
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"return an array filled with the arguments and variables of this context" |
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|n nSkipped| |
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"/ the flas-numVars includes the receiver and args |
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nSkipped := super numVars "self numArgs + self numVars". |
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"/ but my context setup is args+numvars. |
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nSkipped := super numArgs + super numVars. |
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253 |
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254 |
n := self size - nSkipped. |
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n == 0 ifTrue:[ |
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"/ little optimization here - avaoid creating empty containers |
257 |
^ #() |
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261 | 258 |
]. |
259 |
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^ (Array new:n) replaceFrom:1 to:n with:self startingAt:nSkipped+1. |
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261 |
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"Created: / 13.1.1998 / 15:44:12 / cg" |
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"Modified: / 13.1.1998 / 17:22:54 / cg" |
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! |
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265 |
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747 | 266 |
vars |
261 | 267 |
"return an array filled with the local variables of this context" |
268 |
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269 |
|nonVars mySize| |
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270 |
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mySize := self numVars. |
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mySize == 0 ifTrue:[ |
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"/ little optimization here - avaoid creating empty containers |
274 |
^ #() |
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261 | 275 |
]. |
276 |
nonVars := (self arg1Index-1) + self numArgs. |
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^ (Array new:mySize) replaceFrom:1 to:mySize with:self startingAt:nonVars+1 |
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278 |
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"Created: / 13.1.1998 / 16:48:16 / cg" |
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252 | 280 |
! ! |
281 |
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!JavaContext methodsFor:'exception handler support'! |
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117 | 283 |
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255 | 284 |
exceptionArg:aJavaException |
511 | 285 |
exArg := aJavaException. |
286 |
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287 |
"Created: / 7.1.1998 / 21:36:56 / cg" |
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! |
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289 |
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exceptionArg:aJavaException pc:newPc |
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exArg := aJavaException. |
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exPC := newPc. |
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255 | 293 |
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"Created: / 7.1.1998 / 21:36:56 / cg" |
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! |
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296 |
||
252 | 297 |
markForException |
298 |
"set the exception handler flag in the receiver. |
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The JVM needs this to enter an exception handler instead of restarting |
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from the beginning (when the context is restarted). |
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- a highly internal mechanism and not for public use." |
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117 | 302 |
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747 | 303 |
%{ /* NOCONTEXT */ |
304 |
#ifdef __JAVA_EX_PEND |
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/* actually no longer - only a non-nil exPC is now used as marker */ |
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__INST(flags) = (OBJ)((INT)__INST(flags) | __MASKSMALLINT(__JAVA_EX_PEND)); |
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#endif |
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%} |
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252 | 309 |
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310 |
"Modified: 13.12.1995 / 19:05:22 / cg" |
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28 | 311 |
! ! |
312 |
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313 |
!JavaContext methodsFor:'printing & storing'! |
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314 |
||
252 | 315 |
receiverPrintString |
747 | 316 |
"return a string describing the receiver of the context" |
52 | 317 |
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680 | 318 |
|receiverClass receiverClassName newString implementorClass searchClass| |
28 | 319 |
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363 | 320 |
"/ %{ |
321 |
"/ /* |
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322 |
"/ * special handling for (invalid) free objects. |
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323 |
"/ * these only appear if some primitiveCode does not correctly use SEND macros, |
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"/ * which may lead to sends to free objects. In normal operation, this 'cannot' happen. |
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747 | 325 |
"/ */ |
363 | 326 |
"/ if (__isNonNilObject(__INST(receiver)) && (__qClass(__INST(receiver))==nil)) { |
327 |
"/ receiverClassName = __MKSTRING("FreeObject"); |
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328 |
"/ } |
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"/ %}. |
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680 | 330 |
"/ receiverClassName notNil ifTrue:[^ receiverClassName]. |
228 | 331 |
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252 | 332 |
receiverClass := receiver class. |
680 | 333 |
"/ java has no class-methods ... |
334 |
receiverClass := receiverClass theNonMetaclass. |
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335 |
||
336 |
receiverClassName := receiverClass nameInBrowser. |
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252 | 337 |
(receiverClass == SmallInteger) ifTrue:[ |
747 | 338 |
newString := '(' , receiver printString , ') ' , receiverClassName |
228 | 339 |
] ifFalse:[ |
747 | 340 |
newString := receiverClassName |
228 | 341 |
]. |
342 |
||
252 | 343 |
" |
344 |
kludge to avoid slow search for containing class |
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345 |
" |
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346 |
(selector ~~ #doIt and:[selector ~~ #doIt:]) ifTrue:[ |
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747 | 347 |
implementorClass := self methodClass. |
252 | 348 |
]. |
349 |
implementorClass notNil ifTrue: [ |
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747 | 350 |
(implementorClass ~~ receiverClass) ifTrue: [ |
351 |
newString := newString , '>>>', |
|
352 |
implementorClass nameInBrowser printString |
|
353 |
] |
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252 | 354 |
] ifFalse:[ |
747 | 355 |
searchClass := self searchClass. |
356 |
searchClass ~~ receiverClass ifTrue:[ |
|
357 |
newString := newString , '>>>' , searchClass nameInBrowser |
|
358 |
]. |
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252 | 359 |
"/ " |
360 |
"/ kludge for doIt - these unbound methods are not |
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361 |
"/ found in the classes methodDictionary |
|
362 |
"/ " |
|
363 |
"/ (selector ~~ #doIt and:[selector ~~ #doIt:]) ifTrue:[ |
|
364 |
"/ newString := newString , '>>>**NONE**' |
|
365 |
"/ ] |
|
28 | 366 |
]. |
367 |
||
252 | 368 |
^ newString |
28 | 369 |
! ! |
370 |
||
343 | 371 |
!JavaContext methodsFor:'queries'! |
372 |
||
373 |
hasStackToShow |
|
374 |
"private interface to the debugger. |
|
375 |
Smalltalk contexts return false here - other language frames |
|
376 |
(i.e. Java frames) may want to show the evaluation stack" |
|
377 |
||
378 |
^ true |
|
379 |
||
380 |
"Modified: / 13.5.1997 / 16:31:12 / cg" |
|
381 |
"Created: / 7.5.1998 / 01:23:57 / cg" |
|
382 |
! |
|
383 |
||
346 | 384 |
isJavaContext |
385 |
"return true, if this is a javaContext." |
|
386 |
||
387 |
^ true |
|
388 |
||
389 |
"Created: / 8.5.1998 / 21:23:47 / cg" |
|
390 |
! |
|
391 |
||
343 | 392 |
stackFrame |
393 |
"private interface to the debugger." |
|
394 |
||
395 |
^ (1 to:self size) collect:[:i | self at:i] |
|
396 |
||
397 |
"Created: / 7.5.1998 / 01:26:19 / cg" |
|
398 |
! ! |
|
399 |
||
129 | 400 |
!JavaContext class methodsFor:'documentation'! |
28 | 401 |
|
402 |
version |
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748
da0840b7798c
Manufactured by SVN::ImportFromCVSTask to fix repository layout
jv
parents:
747
diff
changeset
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403 |
^ '$Id$' |
28 | 404 |
! ! |