author | Claus Gittinger <cg@exept.de> |
Wed, 22 Sep 2004 11:53:14 +0200 | |
changeset 8578 | 78a49180f32c |
parent 8488 | 9ee7c782f48e |
child 8687 | d6e6e2c0c27c |
permissions | -rw-r--r-- |
1 | 1 |
" |
5 | 2 |
COPYRIGHT (c) 1988 by Claus Gittinger |
154 | 3 |
All Rights Reserved |
1 | 4 |
|
5 |
This software is furnished under a license and may be used |
|
6 |
only in accordance with the terms of that license and with the |
|
7 |
inclusion of the above copyright notice. This software may not |
|
8 |
be provided or otherwise made available to, or used by, any |
|
9 |
other person. No title to or ownership of the software is |
|
10 |
hereby transferred. |
|
11 |
" |
|
12 |
||
5422 | 13 |
"{ Package: 'stx:libbasic' }" |
14 |
||
1 | 15 |
Object variableSubclass:#Context |
2646 | 16 |
instanceVariableNames:'flags sender* home receiver selector searchClass lineNr |
17 |
retvalTemp handle*' |
|
1334
8b21c5f67b15
allow different implementations of singleStep (JAVA support)
Claus Gittinger <cg@exept.de>
parents:
1293
diff
changeset
|
18 |
classVariableNames:'InvalidReturnSignal SingleStepInterruptRequest' |
749 | 19 |
poolDictionaries:'' |
20 |
category:'Kernel-Methods' |
|
1 | 21 |
! |
22 |
||
1810 | 23 |
!Context class methodsFor:'documentation'! |
54 | 24 |
|
88 | 25 |
copyright |
26 |
" |
|
27 |
COPYRIGHT (c) 1988 by Claus Gittinger |
|
154 | 28 |
All Rights Reserved |
88 | 29 |
|
30 |
This software is furnished under a license and may be used |
|
31 |
only in accordance with the terms of that license and with the |
|
32 |
inclusion of the above copyright notice. This software may not |
|
33 |
be provided or otherwise made available to, or used by, any |
|
34 |
other person. No title to or ownership of the software is |
|
35 |
hereby transferred. |
|
36 |
" |
|
37 |
! |
|
38 |
||
54 | 39 |
documentation |
40 |
" |
|
402 | 41 |
Contexts represent the stack frame objects, which keep the processing |
42 |
state of a method or block (i.e. its local variables, temporaries etc.) |
|
43 |
Every message send adds a context to a chain, which can be traced back via |
|
44 |
the sender field. The context of the currently active method is always |
|
45 |
accessable via the pseuodoVariable called 'thisContext'. |
|
141 | 46 |
(The actual implementation uses the machines stack for this, building real |
402 | 47 |
contexts on demand only). |
54 | 48 |
|
69 | 49 |
For both method- and block-contexts, the layout is the same. |
402 | 50 |
For method contexts, the home-field is nil, while for block contexts the home- |
141 | 51 |
field is either the context of its surrounding block (i.e. the context of the |
52 |
block, in which the receiving block was created, if its a nested block) or of |
|
53 |
its home method. |
|
54 |
||
55 |
Contexts of cheap blocks do not have a home context - their home field is |
|
56 |
also nil. |
|
54 | 57 |
|
141 | 58 |
Currently, contexts do not contain a reference to the method or block which |
59 |
created it - this is not needed for program execution, but could get the debugger |
|
60 |
somewhat into trouble: it has to search the class hierarchy for receiver/selector |
|
61 |
combinations to find the method. This usually works, but fails in case of methods |
|
62 |
which are not anchored in any class - especially leading to problems with wrapper- |
|
63 |
and lazy methods. Also, Method>>valueWithReceiver - type of invocations cannot |
|
64 |
be easily debugged. |
|
402 | 65 |
Therefore, the implementation may be changed in the near future, to include a |
141 | 66 |
field for the method/block, and set it in the VM during program execution. |
67 |
(there may be some small performance penalty for this, though). |
|
68 |
||
402 | 69 |
LineNumbers vs. program counter: |
70 |
||
71 |
Due to the compilation to machine code, methods and/or block do not |
|
216 | 72 |
always (actually: do seldom) contain bytecodes. Thus, there is no such concept |
73 |
as a bytecode p-counter. To support debugging, the linenumber within the |
|
74 |
original source is instead remembered when a send or loop entry is performed. |
|
75 |
Since linenumbers are not always sufficient for debugging (multiple sends in one |
|
402 | 76 |
line), this may be changed in future versions to a character offset, giving |
216 | 77 |
the position of the selector in the source. |
1 | 78 |
|
402 | 79 |
Restartable / Returnable contexts: |
80 |
||
81 |
In previous versions (up to ST/X 2.10.5), every method stored enough |
|
82 |
information in the context for that one to be restartable later (for example, |
|
83 |
via the debuggers restart button). With 2.10.6, this is now an stc-compiler |
|
84 |
option, and the system as delivered is compiled to only create restartable |
|
85 |
contexts for those which contain blocks. This resulted in an overall speedup of |
|
86 |
roughly 10-20% percent, depending on the type of CPU. However, it makes most |
|
87 |
methods non-restartable (however, abort, signal handling and unwind blocks work |
|
88 |
as usual). |
|
89 |
In practice, this was reported to be not a severe limitation and all users were happy |
|
90 |
to trade the increased performance for that slight inconvenience. |
|
91 |
(during development, this is seldom a problem, since interpreted methods are always |
|
92 |
returnable and restartable) |
|
93 |
If you do not like this (and you are a happy owner of the full distribution), you |
|
94 |
should recompile all classes with stc's '-optContext' flag. |
|
95 |
||
96 |
Resuming contexts: |
|
97 |
||
98 |
Strictly speaking, ST/X does not support a context to be resumed. However, |
|
99 |
it does support a forced return (i.e. non-local-return) from a context. |
|
100 |
Thus, resume of a context is implemented by forcing a return from the context |
|
101 |
which was created by the method called from the first one. The effect is the same. |
|
102 |
||
103 |
Returning from a dead method: |
|
104 |
||
105 |
Blocksreturn from an outlived context (i.e. its home method has already returned) |
|
106 |
is now rewarded by an invalidReturn exception - it used to be a noop in previous |
|
107 |
releases (The blue book described this to be a noop, but other smalltalk implementations |
|
108 |
changed this to be an invalid operation - good decision) |
|
109 |
||
110 |
||
1282 | 111 |
[instance variables:] |
6003 | 112 |
flags <SmallInteger> used by the VM; never touch. |
113 |
contains info about number of args, |
|
114 |
locals and temporaries. |
|
216 | 115 |
|
6003 | 116 |
sender <Context> the 'calling / sending' context |
117 |
This is not directly accessable, since it may |
|
118 |
be a lazy context (i.e. an empty frame). |
|
119 |
The #sender method cares for this. |
|
216 | 120 |
|
6003 | 121 |
home <Context> the context, where this block was |
122 |
created, or nil if its a method context |
|
123 |
There are also cheap blocks, which do |
|
124 |
not need a reference to the home context, |
|
125 |
for those, its nil too. |
|
216 | 126 |
|
6003 | 127 |
receiver <Object> the receiver of this message |
216 | 128 |
|
6003 | 129 |
selector <Symbol> the selector of this message |
216 | 130 |
|
6003 | 131 |
searchClass <Class> the class, where the message lookup started |
132 |
(for super sends) or nil, for regular sends. |
|
141 | 133 |
|
6003 | 134 |
lineNr <SmallInteger> the position where the context left off |
135 |
(kind of p-counter). Only the low 16bits |
|
136 |
are valid. |
|
141 | 137 |
|
6003 | 138 |
retValTemp nil temporary - always nil, when you see the context |
139 |
(used in the VM as temporary) |
|
216 | 140 |
|
6003 | 141 |
handle *noObject* used by the VM; not accessable, not an object |
141 | 142 |
|
6003 | 143 |
<indexed> arguments of the send followed by |
144 |
locals of the method/block followed by |
|
145 |
temporaries. |
|
1 | 146 |
|
6003 | 147 |
[errors:] |
148 |
CannotReturnError raised when a block tries |
|
149 |
to return ('^') from a method context |
|
150 |
which itself has already returned |
|
151 |
(i.e. there is no place to return to) |
|
216 | 152 |
|
69 | 153 |
WARNING: layout and size known by the compiler and runtime system - do not change. |
1282 | 154 |
|
1293 | 155 |
|
156 |
[author:] |
|
6003 | 157 |
Claus Gittinger |
1293 | 158 |
|
1282 | 159 |
[see also:] |
6003 | 160 |
Block Process Method |
161 |
( contexts, stacks & unwinding : programming/contexts.html) |
|
54 | 162 |
" |
163 |
! ! |
|
1 | 164 |
|
1810 | 165 |
!Context class methodsFor:'initialization'! |
105 | 166 |
|
167 |
initialize |
|
6000 | 168 |
"/ InvalidReturnSignal isNil ifTrue:[ |
169 |
"/ InvalidReturnSignal := ErrorSignal newSignalMayProceed:true. |
|
170 |
"/ InvalidReturnSignal nameClass:self message:#invalidReturnSignal. |
|
171 |
"/ InvalidReturnSignal notifierString:'invalid return; method cannot return twice'. |
|
172 |
"/ |
|
173 |
CannotReturnError notifierString:'invalid return; method cannot return twice'. |
|
174 |
CannotResumeError notifierString:'invalid resume'. |
|
1334
8b21c5f67b15
allow different implementations of singleStep (JAVA support)
Claus Gittinger <cg@exept.de>
parents:
1293
diff
changeset
|
175 |
|
6000 | 176 |
SingleStepInterruptRequest isNil ifTrue:[ |
177 |
SingleStepInterruptRequest := QuerySignal new. |
|
178 |
SingleStepInterruptRequest nameClass:self message:#singleStepInterruptRequest. |
|
179 |
SingleStepInterruptRequest notifierString:'single step'. |
|
105 | 180 |
] |
1334
8b21c5f67b15
allow different implementations of singleStep (JAVA support)
Claus Gittinger <cg@exept.de>
parents:
1293
diff
changeset
|
181 |
|
8b21c5f67b15
allow different implementations of singleStep (JAVA support)
Claus Gittinger <cg@exept.de>
parents:
1293
diff
changeset
|
182 |
"Modified: 6.5.1996 / 16:46:03 / cg" |
105 | 183 |
! ! |
184 |
||
1810 | 185 |
!Context class methodsFor:'Signal constants'! |
105 | 186 |
|
6000 | 187 |
cannotResumeSignal |
188 |
"return the signal used when a method is tried to be resumed, which cannot" |
|
189 |
||
190 |
^ CannotResumeError |
|
191 |
! |
|
192 |
||
193 |
cannotReturnSignal |
|
194 |
"return the signal used when a method is tried to be returned twice |
|
195 |
or, when some dead context is unwound or restarted." |
|
196 |
||
197 |
^ CannotReturnError |
|
198 |
! |
|
199 |
||
105 | 200 |
invalidReturnSignal |
141 | 201 |
"return the signal used when a method is tried to be returned twice |
202 |
or, when some dead context is unwound or restarted." |
|
203 |
||
8357 | 204 |
<resource: #obsolete> |
6000 | 205 |
self obsoleteMethodWarning:'use #cannotReturnSignal'. |
206 |
^ self cannotReturnSignal. |
|
1334
8b21c5f67b15
allow different implementations of singleStep (JAVA support)
Claus Gittinger <cg@exept.de>
parents:
1293
diff
changeset
|
207 |
! |
8b21c5f67b15
allow different implementations of singleStep (JAVA support)
Claus Gittinger <cg@exept.de>
parents:
1293
diff
changeset
|
208 |
|
8b21c5f67b15
allow different implementations of singleStep (JAVA support)
Claus Gittinger <cg@exept.de>
parents:
1293
diff
changeset
|
209 |
singleStepInterruptRequest |
8b21c5f67b15
allow different implementations of singleStep (JAVA support)
Claus Gittinger <cg@exept.de>
parents:
1293
diff
changeset
|
210 |
"return the dummy query signal to ask for single stepping" |
8b21c5f67b15
allow different implementations of singleStep (JAVA support)
Claus Gittinger <cg@exept.de>
parents:
1293
diff
changeset
|
211 |
|
8b21c5f67b15
allow different implementations of singleStep (JAVA support)
Claus Gittinger <cg@exept.de>
parents:
1293
diff
changeset
|
212 |
^ SingleStepInterruptRequest |
8b21c5f67b15
allow different implementations of singleStep (JAVA support)
Claus Gittinger <cg@exept.de>
parents:
1293
diff
changeset
|
213 |
|
8b21c5f67b15
allow different implementations of singleStep (JAVA support)
Claus Gittinger <cg@exept.de>
parents:
1293
diff
changeset
|
214 |
"Created: 6.5.1996 / 16:46:32 / cg" |
105 | 215 |
! ! |
216 |
||
1810 | 217 |
!Context class methodsFor:'queries'! |
3 | 218 |
|
219 |
isBuiltInClass |
|
1264 | 220 |
"return true if this class is known by the run-time-system. |
221 |
Here, true is returned." |
|
3 | 222 |
|
223 |
^ true |
|
1264 | 224 |
|
225 |
"Modified: 23.4.1996 / 15:58:00 / cg" |
|
3 | 226 |
! ! |
227 |
||
4485 | 228 |
!Context class methodsFor:'special searching'! |
229 |
||
230 |
findFirstSpecialHandle:searchForHandle raise:searchForRaise |
|
231 |
|c| |
|
232 |
||
233 |
%{ |
|
234 |
OBJ __c__; |
|
235 |
||
236 |
__c__ = __ContextInstPtr(__thisContext)->c_sender; |
|
237 |
if (__isLazy(__c__)) { |
|
238 |
__PATCHUPCONTEXT(__c__); |
|
239 |
} |
|
240 |
c = __c__; |
|
241 |
%}. |
|
242 |
^ c findSpecialHandle:searchForHandle raise:searchForRaise |
|
243 |
||
244 |
||
245 |
! ! |
|
246 |
||
7261 | 247 |
!Context methodsFor:'Compatibility-VW'! |
5983 | 248 |
|
249 |
resumeWith:value |
|
250 |
"same as #resume: - visualWorks compatibility" |
|
251 |
||
252 |
self resume:value |
|
253 |
! ! |
|
254 |
||
623 | 255 |
!Context methodsFor:'accessing'! |
256 |
||
257 |
argAt:n |
|
258 |
"return the n'th argument" |
|
259 |
||
1726 | 260 |
n > self numArgs ifTrue:[ |
3143 | 261 |
^ self error:'invalid arg access' |
1726 | 262 |
]. |
623 | 263 |
^ self at:n |
1726 | 264 |
|
265 |
"Modified: 12.10.1996 / 21:44:28 / cg" |
|
623 | 266 |
! |
267 |
||
268 |
argAt:n put:value |
|
269 |
"set the n'th argument - useful when the receiver should be restarted" |
|
154 | 270 |
|
1726 | 271 |
n > self numArgs ifTrue:[ |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
272 |
^ self error:'invalid arg access' |
1726 | 273 |
]. |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
274 |
self at:n put:value. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
275 |
^ value |
1726 | 276 |
|
277 |
"Modified: 12.10.1996 / 21:44:32 / cg" |
|
623 | 278 |
! |
279 |
||
280 |
args |
|
281 |
"return an array filled with the arguments of this context" |
|
282 |
||
283 |
|n| |
|
284 |
||
285 |
n := self numArgs. |
|
3130 | 286 |
n == 0 ifTrue:[ |
287 |
"/ little optimization here - avaoid creating empty containers |
|
288 |
^ #() |
|
289 |
]. |
|
623 | 290 |
^ (Array new:n) replaceFrom:1 to:n with:self. |
291 |
! |
|
154 | 292 |
|
623 | 293 |
argsAndVars |
294 |
"return an array filled with the arguments and variables of this context" |
|
295 |
||
296 |
|n| |
|
297 |
||
1810 | 298 |
n := self numArgs + self numVars. |
3130 | 299 |
n == 0 ifTrue:[ |
3143 | 300 |
"/ little optimization here - avoid creating empty containers |
3130 | 301 |
^ #() |
302 |
]. |
|
623 | 303 |
^ (Array new:n) replaceFrom:1 to:n with:self. |
1810 | 304 |
|
305 |
"Modified: 23.10.1996 / 16:19:41 / cg" |
|
623 | 306 |
! |
154 | 307 |
|
7324
9e145a7ae670
need unfix, when changed via at:put:
Claus Gittinger <cg@exept.de>
parents:
7261
diff
changeset
|
308 |
at:n put:value |
9e145a7ae670
need unfix, when changed via at:put:
Claus Gittinger <cg@exept.de>
parents:
7261
diff
changeset
|
309 |
super at:n put:value. |
9e145a7ae670
need unfix, when changed via at:put:
Claus Gittinger <cg@exept.de>
parents:
7261
diff
changeset
|
310 |
|
9e145a7ae670
need unfix, when changed via at:put:
Claus Gittinger <cg@exept.de>
parents:
7261
diff
changeset
|
311 |
"/ need some aid for optimized code - |
9e145a7ae670
need unfix, when changed via at:put:
Claus Gittinger <cg@exept.de>
parents:
7261
diff
changeset
|
312 |
"/ some machines have the arguments/receiver etc. kept in register vars ... |
9e145a7ae670
need unfix, when changed via at:put:
Claus Gittinger <cg@exept.de>
parents:
7261
diff
changeset
|
313 |
"/ the unfix updates the machine-stack version of the receiver. |
9e145a7ae670
need unfix, when changed via at:put:
Claus Gittinger <cg@exept.de>
parents:
7261
diff
changeset
|
314 |
%{ |
9e145a7ae670
need unfix, when changed via at:put:
Claus Gittinger <cg@exept.de>
parents:
7261
diff
changeset
|
315 |
__UNFIXCONTEXT(self, 0); |
9e145a7ae670
need unfix, when changed via at:put:
Claus Gittinger <cg@exept.de>
parents:
7261
diff
changeset
|
316 |
%}. |
9e145a7ae670
need unfix, when changed via at:put:
Claus Gittinger <cg@exept.de>
parents:
7261
diff
changeset
|
317 |
^ value |
9e145a7ae670
need unfix, when changed via at:put:
Claus Gittinger <cg@exept.de>
parents:
7261
diff
changeset
|
318 |
! |
9e145a7ae670
need unfix, when changed via at:put:
Claus Gittinger <cg@exept.de>
parents:
7261
diff
changeset
|
319 |
|
623 | 320 |
home |
321 |
"return the immediate home of the receiver. |
|
322 |
for block contexts, this is the methodcontext, where the block was created, |
|
323 |
for nested block contexts, its the surrounding blocks context. |
|
324 |
for method-contexts this is nil." |
|
25 | 325 |
|
623 | 326 |
^ nil "home" |
327 |
! |
|
1 | 328 |
|
3324
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
329 |
homeReceiver |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
330 |
"return the receiver from the context, where the receiver was defined" |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
331 |
|
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
332 |
^ receiver |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
333 |
|
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
334 |
"Created: / 5.3.1998 / 16:18:26 / stefan" |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
335 |
! |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
336 |
|
1 | 337 |
instVarAt:index |
69 | 338 |
"have to catch instVar access to retVal and handle - they are invalid. |
339 |
Notice, that one of the next ST/X versions will get some syntactic |
|
340 |
extension to get this automatically)." |
|
1 | 341 |
|
3508 | 342 |
(index == 2) ifTrue:[^ self sender]."/ sender - must be accessed specially |
3182
2526de1e5030
dont allow setting of the sender via instVarAt:put:
Claus Gittinger <cg@exept.de>
parents:
3143
diff
changeset
|
343 |
(index == 8) ifTrue:[^ nil]. "/ retvalTemp - invisible |
2526de1e5030
dont allow setting of the sender via instVarAt:put:
Claus Gittinger <cg@exept.de>
parents:
3143
diff
changeset
|
344 |
(index == 9) ifTrue:[^ nil]. "/ handle to machine stack - invisible |
1 | 345 |
^ super instVarAt:index |
346 |
! |
|
347 |
||
348 |
instVarAt:index put:value |
|
69 | 349 |
"have to catch instVar access to retVal and handle - they are invalid. |
350 |
Notice, that one of the next ST/X versions will get some syntactic |
|
351 |
extension to get this automatically)." |
|
1 | 352 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
353 |
(index == 2) ifTrue:[^ nil]. "/ sender - not allowed to change |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
354 |
(index == 8) ifTrue:[^ nil]. "/ retvalTemp - not allowed to change |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
355 |
(index == 9) ifTrue:[^ nil]. "/ handle to machine stack - not allowed to change |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
356 |
super instVarAt:index put:value. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
357 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
358 |
"/ need some aid for optimized code - |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
359 |
"/ some machines have the arguments kept in register vars ... |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
360 |
"/ the unfix updates the machine-stack version of the receiver. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
361 |
%{ |
4570 | 362 |
__UNFIXCONTEXT(self, 0); |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
363 |
%}. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
364 |
^ value |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
365 |
|
1 | 366 |
! |
367 |
||
4328
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
368 |
javaLineNumber |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
369 |
|nr pc| |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
370 |
|
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
371 |
lineNr notNil ifTrue:[ |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
372 |
pc := lineNr bitAnd:16rFFFF. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
373 |
]. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
374 |
|
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
375 |
"/ 'ask line for pc:' print. pc printCR. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
376 |
pc isNil ifTrue:[ |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
377 |
nr := self lineNumberFromMethod. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
378 |
nr notNil ifTrue:[ |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
379 |
^ nr |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
380 |
]. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
381 |
" '-> 0 [a]' printCR. " |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
382 |
^0 |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
383 |
]. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
384 |
|
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
385 |
nr := self method lineNumberForPC:pc. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
386 |
nr isNil ifTrue:[ |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
387 |
nr := self lineNumberFromMethod. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
388 |
nr notNil ifTrue:[ |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
389 |
^ nr |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
390 |
]. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
391 |
" '-> 0 [b]' printCR. " |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
392 |
^ 0 |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
393 |
]. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
394 |
"/ '-> ' print. nr printCR. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
395 |
^ nr. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
396 |
|
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
397 |
! |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
398 |
|
623 | 399 |
lineNumber |
400 |
"this returns the lineNumber within the methods source, where the context was |
|
401 |
interrupted or called another method. (currently, sometimes this information |
|
402 |
is not available - in this case 0 is returned)" |
|
1 | 403 |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
404 |
|l| |
3923 | 405 |
|
4328
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
406 |
receiver isJavaObject ifTrue:[ |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
407 |
"/ chances are good that I am a javContext ... |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
408 |
self method isJavaMethod ifTrue:[ |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
409 |
^ self javaLineNumber |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
410 |
] |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
411 |
]. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
412 |
|
3923 | 413 |
lineNr notNil ifTrue:[ |
414 |
l := lineNr bitAnd:16rFFFF. |
|
415 |
]. |
|
416 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
417 |
"/ self isJavaContext ifTrue:[ |nr m| |
3923 | 418 |
"/ m := self method. |
419 |
"/ l isNil ifTrue:[ |
|
420 |
"/ m notNil ifTrue:[ |
|
421 |
"/ nr := m lineNumber |
|
422 |
"/ ]. |
|
423 |
"/ nr notNil ifTrue:[ |
|
424 |
"/ ^ nr |
|
425 |
"/ ]. |
|
426 |
"/ ^0 |
|
427 |
"/ ]. |
|
428 |
"/ nr := self method lineNumberForPC:l. |
|
429 |
"/ nr isNil ifTrue:[ |
|
430 |
"/ m notNil ifTrue:[ |
|
431 |
"/ nr := m lineNumber |
|
432 |
"/ ]. |
|
433 |
"/ nr notNil ifTrue:[ |
|
434 |
"/ ^ nr |
|
435 |
"/ ]. |
|
436 |
"/ ^ 0 |
|
437 |
"/ ]. |
|
438 |
"/ ^ nr. |
|
439 |
"/ ]. |
|
440 |
||
441 |
^ l |
|
442 |
||
443 |
"Modified: / 10.11.1998 / 13:19:48 / cg" |
|
1 | 444 |
! |
445 |
||
4450 | 446 |
lineNumberFromMethod |
447 |
^ 1 |
|
448 |
! |
|
449 |
||
8488 | 450 |
message |
451 |
||
452 |
^ Message selector:selector arguments:self args |
|
453 |
||
454 |
" |
|
455 |
thisContext methodHome message |
|
456 |
thisContext message |
|
457 |
" |
|
458 |
! |
|
459 |
||
1 | 460 |
method |
54 | 461 |
"return the method for which the receiver was created. |
462 |
To save time during normal execution, this information is not held in the |
|
463 |
context, but computed here on request." |
|
1 | 464 |
|
3508 | 465 |
|c sender sendersSelector m| |
1 | 466 |
|
325 | 467 |
c := self searchClass. |
468 |
" |
|
469 |
the below cannot happen in normal circumstances |
|
470 |
(added to avoid recursive errors in case of a broken sender chain) |
|
471 |
" |
|
472 |
c isBehavior ifFalse:[ |
|
3143 | 473 |
'Context [error]: non class in searchClass' errorPrintCR. |
474 |
' selector: ' errorPrint. selector errorPrint. |
|
475 |
' receiver: ' errorPrint. receiver errorPrintCR. |
|
476 |
^ nil |
|
325 | 477 |
]. |
478 |
||
328 | 479 |
c := c whichClassIncludesSelector:selector. |
1 | 480 |
c notNil ifTrue:[ |
3143 | 481 |
^ c compiledMethodAt:selector |
1 | 482 |
]. |
216 | 483 |
|
3508 | 484 |
"mhmh - seems to be a context for an unbound method (as generated by doIt); |
216 | 485 |
look in the senders context. Consider this a kludge. |
3143 | 486 |
(maybe it was not too good of an idea to NOT keep the current |
487 |
method in the context ...) |
|
488 |
Future versions of ST/X's message lookup may store the method in |
|
489 |
the context. |
|
216 | 490 |
" |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
491 |
sender := self sender. |
3143 | 492 |
sender notNil ifTrue:[ |
493 |
sendersSelector := sender selector. |
|
494 |
sendersSelector notNil ifTrue:[ |
|
495 |
(sendersSelector startsWith:'valueWithReceiver:') ifTrue:[ |
|
3508 | 496 |
m := sender receiver. |
497 |
m isMethod ifTrue:[ |
|
498 |
^ m |
|
499 |
] |
|
3143 | 500 |
] |
501 |
] |
|
216 | 502 |
]. |
503 |
||
1 | 504 |
^ nil |
2135
6bd144c1c358
newStyle info & error messages
Claus Gittinger <cg@exept.de>
parents:
1853
diff
changeset
|
505 |
|
3143 | 506 |
"Modified: / 4.1.1998 / 21:15:32 / cg" |
1 | 507 |
! |
508 |
||
212 | 509 |
methodClass |
510 |
"return the class in which the method for which the receiver was created is." |
|
511 |
||
1456 | 512 |
|cls m| |
513 |
||
514 |
cls := self searchClass. |
|
3923 | 515 |
(cls isMeta |
516 |
and:[cls soleInstance isJavaClass]) ifTrue:[ |
|
517 |
cls := cls soleInstance |
|
518 |
]. |
|
1456 | 519 |
|
3923 | 520 |
[cls notNil] whileTrue:[ |
521 |
cls := cls whichClassIncludesSelector:selector. |
|
522 |
cls isNil ifTrue:[^ nil]. |
|
523 |
||
524 |
m := cls compiledMethodAt:selector. |
|
525 |
m notNil ifTrue:[ |
|
526 |
m isIgnored ifFalse:[^ cls]. |
|
527 |
]. |
|
528 |
cls := cls superclass |
|
1456 | 529 |
]. |
530 |
^ cls |
|
531 |
||
3923 | 532 |
"Modified: / 5.11.1998 / 19:07:43 / cg" |
212 | 533 |
! |
534 |
||
623 | 535 |
methodHome |
536 |
"return the method-home - for method contexts this is the receiver" |
|
537 |
||
538 |
^ self |
|
539 |
! |
|
540 |
||
541 |
ntemp |
|
542 |
"return the number of temporary variables of the Block/Method. |
|
1810 | 543 |
(for debugging only). |
544 |
I dont like the name of this method; its here for compatibility." |
|
623 | 545 |
|
1810 | 546 |
^ self numTemps |
547 |
||
548 |
"Modified: 23.10.1996 / 16:19:06 / cg" |
|
623 | 549 |
! |
550 |
||
551 |
numArgs |
|
552 |
"return the number of arguments to the Block/Method" |
|
553 |
||
554 |
%{ /* NOCONTEXT */ |
|
555 |
||
1133 | 556 |
RETURN ( __MKSMALLINT( (__intVal(__INST(flags)) >> __NARG_SHIFT) & __NARG_MASK) ); |
623 | 557 |
%} |
558 |
! |
|
559 |
||
1810 | 560 |
numTemps |
561 |
"return the number of temporary variables of the Block/Method. |
|
562 |
(for debugging only)" |
|
563 |
||
564 |
^ self size - self numArgs - self numVars |
|
565 |
||
566 |
"Created: 23.10.1996 / 16:19:10 / cg" |
|
567 |
"Modified: 23.10.1996 / 16:19:48 / cg" |
|
568 |
! |
|
569 |
||
570 |
numVars |
|
623 | 571 |
"return the number of local variables of the Block/Method" |
536
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
572 |
|
623 | 573 |
%{ /* NOCONTEXT */ |
574 |
||
1133 | 575 |
RETURN ( __MKSMALLINT( (__intVal(__INST(flags)) >> __NVAR_SHIFT) & __NVAR_MASK) ); |
623 | 576 |
%} |
577 |
! |
|
578 |
||
1810 | 579 |
nvars |
580 |
"return the number of local variables of the Block/Method. |
|
581 |
I dont like the name of this method; its here for compatibility." |
|
582 |
||
583 |
^ self numVars |
|
584 |
||
585 |
"Modified: 23.10.1996 / 16:18:44 / cg" |
|
586 |
! |
|
587 |
||
623 | 588 |
receiver |
589 |
"return the receiver of the context" |
|
590 |
||
591 |
^ receiver |
|
592 |
! |
|
593 |
||
4543 | 594 |
receiver:aCompiledCode |
595 |
"set the receiver of the message" |
|
596 |
||
4560
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
597 |
receiver := aCompiledCode. |
4543 | 598 |
|
4560
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
599 |
"/ need some aid for optimized code - |
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
600 |
"/ some machines have the arguments kept in register vars ... |
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
601 |
"/ the unfix updates the machine-stack version of the receiver. |
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
602 |
%{ |
4570 | 603 |
__UNFIXCONTEXT(self, 0); |
4560
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
604 |
%}. |
4543 | 605 |
|
606 |
! |
|
607 |
||
623 | 608 |
searchClass |
609 |
"this is the class where the method-lookup started; |
|
610 |
for normal sends, it is nil (or sometimes the receivers class). |
|
611 |
For supersends, its the superclass of the one, in which the |
|
612 |
caller was defined." |
|
613 |
||
614 |
searchClass notNil ifTrue:[^ searchClass]. |
|
615 |
^ receiver class |
|
616 |
! |
|
617 |
||
618 |
selector |
|
619 |
"return the selector of the method for which the context was created" |
|
620 |
||
621 |
^ selector |
|
536
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
622 |
! |
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
623 |
|
1 | 624 |
sender |
625 |
"return the sender of the context" |
|
626 |
||
536
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
627 |
%{ /* NOCONTEXT */ |
1668
41db5950f9ea
oops - con local variables are now renamed (last change in stc)
Claus Gittinger <cg@exept.de>
parents:
1492
diff
changeset
|
628 |
OBJ theContext; |
536
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
629 |
|
3508 | 630 |
theContext = __INST(sender_); |
949 | 631 |
/* |
632 |
* this special nil test is for the very first context (startup-context); |
|
633 |
* actually, its cosmetics, to avoid a visible nil>>nil context in the debugger. |
|
634 |
*/ |
|
2205 | 635 |
if (__isNonNilObject(theContext)) { |
949 | 636 |
|
1668
41db5950f9ea
oops - con local variables are now renamed (last change in stc)
Claus Gittinger <cg@exept.de>
parents:
1492
diff
changeset
|
637 |
if (__isLazy(theContext)) { |
536
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
638 |
/* |
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
639 |
* this cannot happen |
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
640 |
*/ |
2212 | 641 |
__PATCHUPCONTEXT(theContext); |
536
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
642 |
} |
3508 | 643 |
if (! __isNonLIFO(theContext)) { |
644 |
/* |
|
645 |
* to be prepared for the worst situation |
|
646 |
* (the sender is not stored, so the trap wont catch it) |
|
647 |
* make the writeBarrier trigger manually. |
|
648 |
* We'll see, if this is really required. |
|
649 |
*/ |
|
650 |
theContext->o_space |= CATCHMARK; |
|
651 |
_markNonLIFO(theContext); |
|
652 |
} |
|
536
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
653 |
} |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
654 |
RETURN (theContext); |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
655 |
%} |
1 | 656 |
! |
657 |
||
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
658 |
senderIsNil |
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
659 |
"return true, if I have no sender" |
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
660 |
|
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
661 |
%{ /* NOCONTEXT */ |
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
662 |
if ( __INST(sender_) == nil ) { |
5422 | 663 |
RETURN (true); |
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
664 |
} |
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
665 |
RETURN (false); |
5422 | 666 |
%}. |
667 |
^ self sender isNil |
|
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
668 |
! |
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
669 |
|
623 | 670 |
setLineNumber:aNumber |
671 |
"private entry for uncompiledCodeObject ..." |
|
1 | 672 |
|
623 | 673 |
lineNr := aNumber |
340 | 674 |
! |
675 |
||
5749 | 676 |
setNumArgs:nA numVars:nV |
677 |
"set the number of arguments and variables" |
|
678 |
||
679 |
%{ /* NOCONTEXT */ |
|
680 |
int flg; |
|
681 |
||
682 |
flg = __intVal(__INST(flags)); |
|
683 |
flg = flg & ~(__NARG_MASK << __NARG_SHIFT); |
|
684 |
flg = flg & ~(__NVAR_MASK << __NVAR_SHIFT); |
|
685 |
flg = flg | __intVal(nA) << __NARG_SHIFT; |
|
686 |
flg = flg | __intVal(nV) << __NVAR_SHIFT; |
|
687 |
__INST(flags) = __MKSMALLINT(flg); |
|
688 |
%} |
|
689 |
! |
|
690 |
||
8578 | 691 |
tempAt:index |
692 |
"return the n'th stack-temporary variable" |
|
693 |
||
694 |
^ self at:index |
|
695 |
! |
|
696 |
||
202 | 697 |
temporaries |
698 |
"return an array filled with the temporaries of this context" |
|
699 |
||
308 | 700 |
|nonTemps mySize| |
202 | 701 |
|
1810 | 702 |
nonTemps := self numArgs + self numVars. |
703 |
mySize := self numTemps. |
|
3130 | 704 |
mySize == 0 ifTrue:[ |
705 |
"/ little optimization here - avaoid creating empty containers |
|
706 |
^ #() |
|
707 |
]. |
|
308 | 708 |
^ (Array new:mySize) replaceFrom:1 to:mySize with:self startingAt:nonTemps+1 |
1810 | 709 |
|
710 |
"Modified: 23.10.1996 / 16:20:00 / cg" |
|
202 | 711 |
! |
712 |
||
10 | 713 |
varAt:n |
714 |
"return the n'th local variable" |
|
715 |
||
154 | 716 |
^ self at:(n + self numArgs) |
10 | 717 |
! |
718 |
||
719 |
varAt:n put:value |
|
720 |
"set the n'th local variable - useful when the receiver should be restarted |
|
54 | 721 |
or continued" |
10 | 722 |
|
154 | 723 |
self at:(n + self numArgs) put:value |
10 | 724 |
! |
725 |
||
623 | 726 |
vars |
727 |
"return an array filled with the local variables of this context" |
|
375 | 728 |
|
623 | 729 |
|nonVars mySize| |
360 | 730 |
|
623 | 731 |
nonVars := self numArgs. |
1810 | 732 |
mySize := self numVars. |
3130 | 733 |
mySize == 0 ifTrue:[ |
734 |
"/ little optimization here - avaoid creating empty containers |
|
735 |
^ #() |
|
736 |
]. |
|
623 | 737 |
^ (Array new:mySize) replaceFrom:1 to:mySize with:self startingAt:nonVars+1 |
1810 | 738 |
|
739 |
"Modified: 23.10.1996 / 16:20:06 / cg" |
|
1 | 740 |
! ! |
741 |
||
623 | 742 |
!Context methodsFor:'copying'! |
415 | 743 |
|
3350
40dc4807a6d4
must catch #deppCopyUsing: instead of #deepCopy.
Claus Gittinger <cg@exept.de>
parents:
3324
diff
changeset
|
744 |
deepCopyUsing:aDictionary |
623 | 745 |
"raise an error - deepCopy is not allowed for contexts" |
37 | 746 |
|
623 | 747 |
^ self deepCopyError |
3350
40dc4807a6d4
must catch #deppCopyUsing: instead of #deepCopy.
Claus Gittinger <cg@exept.de>
parents:
3324
diff
changeset
|
748 |
|
40dc4807a6d4
must catch #deppCopyUsing: instead of #deepCopy.
Claus Gittinger <cg@exept.de>
parents:
3324
diff
changeset
|
749 |
"Created: / 31.3.1998 / 15:51:14 / cg" |
1 | 750 |
! ! |
751 |
||
77 | 752 |
!Context methodsFor:'error handling'! |
753 |
||
754 |
invalidReturn:returnValue |
|
755 |
"this message is sent by the VM, when a methods context |
|
756 |
which has already returned is about to return again. |
|
757 |
(i.e. about to execute a return from an already returned |
|
105 | 758 |
method in a block). |
141 | 759 |
We raise a signal here, to allow catching of that situation." |
77 | 760 |
|
406 | 761 |
" |
762 |
in previous versions of ST/X and ST-80, this was no error; |
|
763 |
(instead, a normal blockreturn was performed to the value-sender). |
|
764 |
From a note in comp.lang.smalltalk, I conclude that new ST-80 versions |
|
765 |
now raise an error if this happens. |
|
766 |
Comment out the raise below to get that (old) behavior |
|
767 |
BETTER REWRITE YOUR APPLICATION |
|
768 |
" |
|
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
769 |
"/ old behavior: |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
770 |
"/ ^ returnValue |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
771 |
|
282 | 772 |
"/ new behavior: |
773 |
||
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
774 |
"/ if this context is one of another process, |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
775 |
"/ use another error message. |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
776 |
|
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
777 |
(home notNil and:[home sender notNil]) ifTrue:[ |
6002 | 778 |
^ CannotReturnError |
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
779 |
raiseRequestWith:returnValue |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
780 |
errorString:'cannot return from another process''s context'. |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
781 |
]. |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
782 |
|
6002 | 783 |
^ CannotReturnError |
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
784 |
raiseRequestWith:returnValue. |
282 | 785 |
|
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
786 |
"Modified: / 2.2.1998 / 15:19:52 / cg" |
406 | 787 |
! |
788 |
||
789 |
invalidReturnOrRestart:returnValue |
|
790 |
"this message is sent by the VM, when a methods context |
|
791 |
which was compiled non-returnable is about to return again. |
|
792 |
We raise a signal here, to allow catching of that situation." |
|
793 |
||
6002 | 794 |
^ CannotReturnError |
795 |
raiseRequestWith:returnValue |
|
796 |
errorString:'method was compiled non-resumable' |
|
360 | 797 |
! |
798 |
||
799 |
invalidReturnOrRestartError:how with:value |
|
800 |
"common error reporter for restart/return errors" |
|
801 |
||
802 |
self canReturn ifTrue:[ |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
803 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
804 |
tried to return from/restart a context which is already dead |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
805 |
(i.e. the method/block has already executed a return) |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
806 |
" |
6002 | 807 |
^ CannotReturnError |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
808 |
raiseRequestWith:value |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
809 |
errorString:(how , ' context not on calling chain') |
360 | 810 |
]. |
811 |
" |
|
812 |
tried to return from/restart a context of a method which was compiled |
|
813 |
unrestartable or of a block (which is never restartable) |
|
814 |
" |
|
6002 | 815 |
^ CannotReturnError |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
816 |
raiseRequestWith:value |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
817 |
errorString:(how , ' context cannot be restarted/returned from') |
77 | 818 |
! ! |
819 |
||
6404 | 820 |
!Context methodsFor:'fixups'! |
821 |
||
822 |
fixAllLineNumbers |
|
823 |
%{ |
|
824 |
__PATCHUPCONTEXTS(__thisContext); |
|
6424 | 825 |
__CONTEXTLINENOS(self); |
6404 | 826 |
%} |
827 |
! ! |
|
828 |
||
623 | 829 |
!Context methodsFor:'minidebugger printing'! |
830 |
||
831 |
fullPrint |
|
832 |
"print the receiver, selector and args of the context |
|
833 |
- used only for MiniDebuggers walkback print" |
|
834 |
||
835 |
self receiverPrintString print. ' ' print. selector print. |
|
836 |
self size ~~ 0 ifTrue: [ |
|
3143 | 837 |
' ' print. self argsDisplayString print |
623 | 838 |
]. |
1426 | 839 |
' [' print. self lineNumber print. ']' printCR |
623 | 840 |
|
841 |
" |
|
842 |
thisContext fullPrint |
|
843 |
" |
|
1426 | 844 |
|
845 |
"Modified: 20.5.1996 / 10:27:14 / cg" |
|
623 | 846 |
! |
847 |
||
848 |
fullPrintAll |
|
849 |
"print a full walkback starting at the receiver |
|
850 |
- used only for MiniDebuggers walkback print" |
|
851 |
||
852 |
|context| |
|
853 |
||
854 |
context := self. |
|
855 |
[context notNil] whileTrue: [ |
|
856 |
context fullPrint. |
|
857 |
context := context sender |
|
858 |
] |
|
859 |
||
860 |
" |
|
861 |
thisContext fullPrintAll |
|
862 |
" |
|
2173 | 863 |
! |
864 |
||
4674 | 865 |
fullPrintAllLevels:nOrNil |
866 |
"print a full walkback starting at the receiver, only print n levels |
|
867 |
- used only for MiniDebuggers walkback print" |
|
868 |
||
869 |
|context count| |
|
870 |
||
871 |
count := 0. |
|
872 |
context := self. |
|
873 |
[context notNil] whileTrue: [ |
|
874 |
context fullPrint. |
|
875 |
context := context sender. |
|
5911 | 876 |
nOrNil notNil ifTrue:[ |
4674 | 877 |
(count := count+1) > nOrNil ifTrue:[^self]. |
878 |
] |
|
879 |
] |
|
880 |
||
881 |
" |
|
6648 | 882 |
thisContext fullPrintAllLevels:5 |
4674 | 883 |
" |
884 |
||
885 |
"Created: / 3.9.1999 / 14:02:38 / ps" |
|
623 | 886 |
! ! |
887 |
||
1 | 888 |
!Context methodsFor:'non local control flow'! |
889 |
||
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
890 |
evaluateUnwindActionsUpTo:aContext |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
891 |
"walk up the calling chain, looking for unwind-cleanup actions to |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
892 |
be performed. This depends upon those contexts being specially |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
893 |
marked using #markForUnwind. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
894 |
Returns the argument (i.e. non-nil), if all went well, |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
895 |
nil if aContext is not on the caller chain (definitely an error)" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
896 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
897 |
|con unwindBlock| |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
898 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
899 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
900 |
start with this context, moving up, looking for unwind actions |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
901 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
902 |
con := self findNextUnwindContextOr:aContext. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
903 |
[con notNil and:[con ~~ aContext]] whileTrue:[ |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
904 |
unwindBlock := con receiver unwindHandlerInContext:con. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
905 |
con unmarkForUnwind. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
906 |
unwindBlock value. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
907 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
908 |
con := con findNextUnwindContextOr:aContext. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
909 |
]. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
910 |
^ con |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
911 |
! |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
912 |
|
1 | 913 |
restart |
914 |
"restart the receiver - i.e. the method is evaluated again. |
|
402 | 915 |
if the context to restart already died, trigger an error. |
141 | 916 |
This is a low level helper for unwindAndRestart. |
917 |
||
918 |
NOTICE: |
|
154 | 919 |
NO unwind actions are performed - this is usually not |
920 |
what you want (see Context>>unwindAndRestart). |
|
141 | 921 |
|
922 |
LIMITATION: |
|
154 | 923 |
currently a context can only be restarted by |
928 | 924 |
the owning process - not from outside. |
925 |
Also, the compiler has an option (+optcontext) to create |
|
926 |
non-restartable contexts (which are faster). |
|
927 |
If such a context is restarted, a runtime error is raised." |
|
1 | 928 |
|
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
929 |
%{ /* NOCONTEXT */ |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
930 |
if (__INST(sender_) != nil) { |
3143 | 931 |
__RESUMECONTEXT__(self, RESTART_VALUE, 0); |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
932 |
} |
360 | 933 |
%}. |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
934 |
self sender isNil ifTrue:[^ nil]. |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
935 |
|
69 | 936 |
" |
360 | 937 |
when we arrive here, something went wrong. |
69 | 938 |
debugging ... |
939 |
" |
|
360 | 940 |
^ self invalidReturnOrRestartError:#restart with:nil |
1 | 941 |
! |
942 |
||
623 | 943 |
resume |
944 |
"resume execution in this context. I.e. as if the method called |
|
945 |
last by the receiver did a ^ nil. |
|
946 |
If the context has already returned, report an error. |
|
947 |
||
948 |
NOTICE: |
|
949 |
NO unwind actions are performed (see Context>>unwind). |
|
950 |
||
951 |
LIMITATION: |
|
952 |
currently a context can only be resumed by |
|
928 | 953 |
the owning process - not from outside. |
954 |
Also, the compiler has an option (+optcontext) to create |
|
955 |
non-resumable contexts (which are faster). |
|
956 |
If such a context is restarted, a runtime error is raised." |
|
623 | 957 |
|
958 |
^ self resume:nil |
|
959 |
! |
|
960 |
||
961 |
resume:value |
|
962 |
"resume the receiver - as if it got 'value' from whatever |
|
963 |
it called. This continues execution in the receivers method |
|
964 |
after the point where it did its last send. |
|
965 |
If the context has already returned - report an error. |
|
966 |
||
967 |
NOTICE: |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
968 |
NO unwind actions are performed (see Context>>unwind:). |
623 | 969 |
|
970 |
LIMITATION: |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
971 |
currently a context can only be resumed by |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
972 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
973 |
Also, the compiler has an option (+optcontext) to create |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
974 |
non-resumable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
975 |
If such a context is restarted, a runtime error is raised." |
623 | 976 |
|
1668
41db5950f9ea
oops - con local variables are now renamed (last change in stc)
Claus Gittinger <cg@exept.de>
parents:
1492
diff
changeset
|
977 |
|theContext| |
623 | 978 |
|
979 |
" |
|
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
980 |
starting with this context, find the one below |
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
981 |
(i.e. the one that I have called) and return from it. |
623 | 982 |
" |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
983 |
|
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
984 |
%{ |
4557 | 985 |
OBJ sndr; |
986 |
||
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
987 |
theContext = __thisContext; |
4557 | 988 |
while (theContext != nil) { |
989 |
sndr = __ContextInstPtr(theContext)->c_sender; |
|
990 |
if (sndr == self) break; |
|
991 |
theContext = sndr; |
|
623 | 992 |
} |
3508 | 993 |
if (theContext != nil) { |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
994 |
if (__isLazy(theContext)) { |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
995 |
__PATCHUPCONTEXT(theContext); |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
996 |
} |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
997 |
} |
623 | 998 |
%}. |
999 |
||
1668
41db5950f9ea
oops - con local variables are now renamed (last change in stc)
Claus Gittinger <cg@exept.de>
parents:
1492
diff
changeset
|
1000 |
theContext isNil ifTrue:[ |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1001 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1002 |
tried to resume in context which is already dead |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1003 |
(i.e. the method/block has already executed a return) |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1004 |
" |
4557 | 1005 |
^ thisContext invalidReturnOrRestartError:#'resume:' with:value |
623 | 1006 |
]. |
1668
41db5950f9ea
oops - con local variables are now renamed (last change in stc)
Claus Gittinger <cg@exept.de>
parents:
1492
diff
changeset
|
1007 |
^ theContext return:value |
623 | 1008 |
! |
1009 |
||
4557 | 1010 |
resumeIgnoringErrors:value |
1011 |
"resume the receiver - as if it got 'value' from whatever |
|
1012 |
it called. This continues execution in the receivers method |
|
1013 |
after the point where it did its last send. |
|
1014 |
If the context has already returned - simply return. |
|
1015 |
||
1016 |
NOTICE: |
|
1017 |
NO unwind actions are performed (see Context>>unwind:). |
|
1018 |
||
1019 |
LIMITATION: |
|
1020 |
currently a context can only be resumed by |
|
1021 |
the owning process - not from outside. |
|
1022 |
Also, the compiler has an option (+optcontext) to create |
|
1023 |
non-resumable contexts (which are faster). |
|
1024 |
If such a context is restarted, a runtime error is raised." |
|
1025 |
||
1026 |
" |
|
1027 |
starting with this context, find the one below |
|
1028 |
(i.e. the one that I have called) and return from it. |
|
1029 |
" |
|
1030 |
||
1031 |
%{ |
|
1032 |
OBJ theContext, sndr; |
|
1033 |
||
1034 |
theContext = __thisContext; |
|
1035 |
while (theContext != nil) { |
|
1036 |
sndr = __ContextInstPtr(theContext)->c_sender; |
|
1037 |
if (sndr == self) break; |
|
1038 |
theContext = sndr; |
|
1039 |
} |
|
1040 |
if (theContext != nil) { |
|
1041 |
if (__ContextInstPtr(theContext)->c_sender) { |
|
4635 | 1042 |
if (!((INT)(__ContextInstPtr(theContext)->c_flags) & __MASKSMALLINT(__CANNOT_RETURN))) { |
1043 |
__RESUMECONTEXT__(theContext, value, 0); |
|
1044 |
} |
|
4557 | 1045 |
} |
1046 |
} |
|
1047 |
%}. |
|
1048 |
||
1049 |
"/ no error reporting |
|
1050 |
! |
|
1051 |
||
1052 |
resumeOnErrorProceed:value |
|
1053 |
"resume the receiver - as if it got 'value' from whatever |
|
1054 |
it called. This continues execution in the receivers method |
|
1055 |
after the point where it did its last send. |
|
1056 |
If the context has already returned - simply return. |
|
1057 |
||
1058 |
NOTICE: |
|
1059 |
NO unwind actions are performed (see Context>>unwind:). |
|
1060 |
||
1061 |
LIMITATION: |
|
1062 |
currently a context can only be resumed by |
|
1063 |
the owning process - not from outside. |
|
1064 |
Also, the compiler has an option (+optcontext) to create |
|
1065 |
non-resumable contexts (which are faster). |
|
1066 |
If such a context is restarted, a runtime error is raised." |
|
1067 |
||
1068 |
" |
|
1069 |
starting with this context, find the one below |
|
1070 |
(i.e. the one that I have called) and return from it. |
|
1071 |
" |
|
1072 |
||
1073 |
%{ |
|
1074 |
OBJ theContext, sndr; |
|
1075 |
||
1076 |
theContext = __thisContext; |
|
1077 |
while (theContext != nil) { |
|
1078 |
sndr = __ContextInstPtr(theContext)->c_sender; |
|
1079 |
if (sndr == self) break; |
|
1080 |
theContext = sndr; |
|
1081 |
} |
|
1082 |
if (theContext != nil) { |
|
1083 |
if (__ContextInstPtr(theContext)->c_sender) { |
|
1084 |
__RESUMECONTEXT__(theContext, value, 0); |
|
1085 |
} |
|
1086 |
} |
|
1087 |
%}. |
|
1088 |
||
1089 |
"/ no error reporting |
|
1090 |
! |
|
1091 |
||
69 | 1092 |
return |
141 | 1093 |
"return from this context with nil. I.e. as if it did a ^ nil. |
1094 |
NOTICE: |
|
154 | 1095 |
NO unwind actions are performed - this is usually not |
1096 |
what you want (See Context>>unwind). |
|
1097 |
This is a low level method - a helper for unwind. |
|
1 | 1098 |
|
141 | 1099 |
LIMITATION: |
154 | 1100 |
currently a context can only be returned by |
928 | 1101 |
the owning process - not from outside. |
1102 |
Also, the compiler has an option (+optcontext) to create |
|
1103 |
non-returnable contexts (which are faster). |
|
1104 |
If such a context is restarted, a runtime error is raised." |
|
141 | 1105 |
|
1106 |
^ self return:nil |
|
1 | 1107 |
! |
1108 |
||
69 | 1109 |
return:value |
1110 |
"return from this context as if it did a '^ value'. |
|
141 | 1111 |
NOTICE: |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1112 |
NO unwind actions are performed - this is usually not |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1113 |
what you want (See Context>>unwind:). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1114 |
This is a low level method - a helper for unwind. |
141 | 1115 |
|
1116 |
LIMITATION: |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1117 |
currently a context can only be returned by |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1118 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1119 |
Also, the compiler has an option (+optcontext) to create |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1120 |
non-returnable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1121 |
If such a context is restarted, a runtime error is raised." |
1 | 1122 |
|
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1123 |
%{ /* NOCONTEXT */ |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1124 |
if (__INST(sender_) != nil) { |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1125 |
__RESUMECONTEXT__(self, value, 0); |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1126 |
} |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1127 |
%}. |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1128 |
self sender isNil ifTrue:[^ nil]. |
1 | 1129 |
|
69 | 1130 |
" |
360 | 1131 |
when we arrive here, something went wrong. |
69 | 1132 |
debugging ... |
1133 |
" |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1134 |
^ self invalidReturnOrRestartError:#'return' with:value |
1 | 1135 |
! |
1136 |
||
328 | 1137 |
returnDoing:aBlock |
1138 |
"return from this context as if it did a '^ aBlock value'. |
|
1139 |
The block is evaluated as if called by the receiver context; |
|
1140 |
NOT the true executing context. |
|
1141 |
NOTICE: |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1142 |
NO unwind actions are performed - this is usually not |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1143 |
what you want (See Context>>unwindThenDo:). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1144 |
This is a low level method - a helper for unwind. |
328 | 1145 |
|
1146 |
LIMITATION: |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1147 |
currently a context can only be returned by |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1148 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1149 |
Also, the compiler has an option (+optcontext) to create |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1150 |
non-returnable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1151 |
If such a context is restarted, a runtime error is raised." |
328 | 1152 |
|
4557 | 1153 |
%{ |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1154 |
if (__INST(sender_) != nil) { |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1155 |
__RESUMECONTEXT__(self, aBlock, 2); |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1156 |
} |
360 | 1157 |
%}. |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1158 |
self sender isNil ifTrue:[^ nil]. |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1159 |
|
328 | 1160 |
" |
360 | 1161 |
when we arrive here, something went wrong. |
328 | 1162 |
debugging ... |
1163 |
" |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1164 |
^ self invalidReturnOrRestartError:#'returnDoing' with:aBlock |
328 | 1165 |
! |
1166 |
||
1 | 1167 |
unwind |
69 | 1168 |
"return nil from the receiver - i.e. simulate a '^ nil'. |
360 | 1169 |
If the context has already retruned, report an error. |
1 | 1170 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
69 | 1171 |
and Block>>valueOnUnwindDo: on the way. |
1 | 1172 |
|
141 | 1173 |
LIMITATION: |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1174 |
currently a context can only be unwound by |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1175 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1176 |
i.e. it is not possible for one thread to unwind |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1177 |
another threads context - which does not make sense anyway. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1178 |
However, you can force another thread to do this in its own process |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1179 |
context, by giving it an interrupt action - this does make sense. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1180 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1181 |
Also, the compiler has an option (+optcontext) to create |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1182 |
non-returnable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1183 |
If such a context is restarted, a runtime error is raised." |
141 | 1184 |
|
1185 |
^ self unwind:nil |
|
1 | 1186 |
! |
1187 |
||
1188 |
unwind:value |
|
69 | 1189 |
"return value from the receiver - i.e. simulate a '^ value'. |
360 | 1190 |
If the context has already returned , report an error. |
1 | 1191 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
69 | 1192 |
and Block>>valueOnUnwindDo: on the way. |
141 | 1193 |
|
1194 |
LIMITATION: |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1195 |
currently a context can only be unwound by |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1196 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1197 |
i.e. it is not possible for one thread to unwind |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1198 |
another threads context - which does not make sense anyway. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1199 |
However, you can force another thread to do this in its own process |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1200 |
context, by giving it an interrupt action - this does make sense. |
1 | 1201 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1202 |
Also, the compiler has an option (+optcontext) to create |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1203 |
non-returnable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1204 |
If such a context is restarted, a runtime error is raised." |
1 | 1205 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1206 |
|con| |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1207 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1208 |
self senderIsNil ifFalse:[ |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1209 |
con := thisContext evaluateUnwindActionsUpTo:self. |
141 | 1210 |
]. |
1 | 1211 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1212 |
"oops, if nil, I am not on the calling chain; |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1213 |
(bad bad, unwind action have already been performed. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1214 |
should we check for this situation first and NOT evaluate |
141 | 1215 |
the unwind actions in this case ?) |
1216 |
" |
|
69 | 1217 |
con isNil ifTrue:[ |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1218 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1219 |
tried to return to a context which is already dead |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1220 |
(i.e. the method/block has already executed a return) |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1221 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1222 |
^ self invalidReturnOrRestartError:#'unwind:' with:value |
69 | 1223 |
]. |
141 | 1224 |
" |
1225 |
now, that all unwind-actions are done, I can use the |
|
1226 |
low-level return ... |
|
1227 |
" |
|
1228 |
^ self return:value |
|
1229 |
! |
|
1230 |
||
1231 |
unwindAndRestart |
|
1232 |
"restart the receiver - i.e. the method is evaluated again. |
|
402 | 1233 |
if the context to restart already died report an error. |
141 | 1234 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
1235 |
and Block>>valueOnUnwindDo: before restarting. |
|
1236 |
||
1237 |
LIMITATION: |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1238 |
a context can only be restarted by |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1239 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1240 |
i.e. it is not possible for one thread to unwindAndRestart |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1241 |
another threads context - which does not make sense anyway. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1242 |
However, you can force another thread to do this in its own process |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1243 |
context, by giving it an interrupt action - this does make sense. |
141 | 1244 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1245 |
Also, the compiler has an option (+optcontext) to create |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1246 |
non-restartable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1247 |
If such a context is restarted, a runtime error is raised." |
552
694ecccaa1a0
only evaluate unwind blocks once
Claus Gittinger <cg@exept.de>
parents:
536
diff
changeset
|
1248 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1249 |
|con| |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1250 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1251 |
self senderIsNil ifFalse:[ |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1252 |
con := thisContext evaluateUnwindActionsUpTo:self. |
141 | 1253 |
]. |
1254 |
||
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1255 |
"oops, if nil, I am not on the calling chain; |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1256 |
(bad bad, unwind action have already been performed. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1257 |
should we check for this situation first and NOT evaluate |
141 | 1258 |
the unwind actions in this case ?) |
1259 |
" |
|
1260 |
con isNil ifTrue:[ |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1261 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1262 |
tried to return to a context which is already dead |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1263 |
(i.e. the method/block has already executed a return) |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1264 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1265 |
^ self invalidReturnOrRestartError:#'unwindAndRestart:' with:nil |
141 | 1266 |
]. |
1267 |
" |
|
1268 |
now, that all unwind-actions are done, I can use the |
|
1269 |
low-level restart ... |
|
1270 |
" |
|
1271 |
^ self restart |
|
328 | 1272 |
! |
1273 |
||
4485 | 1274 |
unwindAndResume:value |
1275 |
"resume execution in the the receiver - i.e. simulate a '^ value' |
|
1276 |
from whatever it called last. |
|
1277 |
If the context has already returned , report an error. |
|
1278 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
|
1279 |
and Block>>valueOnUnwindDo: on the way. |
|
1280 |
||
1281 |
LIMITATION: |
|
1282 |
currently a context can only be unwound by |
|
1283 |
the owning process - not from outside. |
|
1284 |
i.e. it is not possible for one thread to unwind |
|
1285 |
another threads context - which does not make sense anyway. |
|
1286 |
However, you can force another thread to do this in its own process |
|
1287 |
context, by giving it an interrupt action - this does make sense. |
|
1288 |
||
1289 |
Also, the compiler has an option (+optcontext) to create |
|
1290 |
non-returnable contexts (which are faster). |
|
1291 |
If such a context is restarted, a runtime error is raised." |
|
1292 |
||
1293 |
|con| |
|
1294 |
||
1295 |
self senderIsNil ifFalse:[ |
|
1296 |
con := thisContext evaluateUnwindActionsUpTo:self. |
|
1297 |
]. |
|
1298 |
||
1299 |
"oops, if nil, I am not on the calling chain; |
|
1300 |
(bad bad, unwind action have already been performed. |
|
1301 |
should we check for this situation first and NOT evaluate |
|
1302 |
the unwind actions in this case ?) |
|
1303 |
" |
|
1304 |
con isNil ifTrue:[ |
|
1305 |
" |
|
1306 |
tried to return to a context which is already dead |
|
1307 |
(i.e. the method/block has already executed a return) |
|
1308 |
" |
|
1309 |
^ self invalidReturnOrRestartError:#'unwindAndResume:' with:value |
|
1310 |
]. |
|
1311 |
" |
|
1312 |
now, that all unwind-actions are done, I can use the |
|
1313 |
low-level resume ... |
|
1314 |
" |
|
1315 |
^ self resume:value |
|
1316 |
! |
|
1317 |
||
328 | 1318 |
unwindThenDo:aBlock |
1319 |
"return the value of aBlock from the receiver - i.e. simulate a '^ aBlock value'. |
|
360 | 1320 |
If the context has already returned , report an error. |
328 | 1321 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
1322 |
and Block>>valueOnUnwindDo: on the way. |
|
1323 |
The block is evaluated AFTER all unwind actions are performed |
|
1324 |
(i.e. the blocks sender will be the receiving context, not the |
|
402 | 1325 |
currently executing context) |
328 | 1326 |
|
1327 |
LIMITATION: |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1328 |
currently a context can only be unwound by |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1329 |
the owning process - not from outside |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1330 |
i.e. it is not possible for one thread to unwindThenDo |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1331 |
another threads context - which does not make sense anyway. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1332 |
However, you can force another thread to do this in its own process |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1333 |
context, by giving it an interrupt action - this does make sense. |
328 | 1334 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1335 |
Also, the compiler has an option (+optcontext) to create |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1336 |
non-returnable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1337 |
If such a context is restarted, a runtime error is raised." |
328 | 1338 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1339 |
|con| |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1340 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1341 |
self senderIsNil ifFalse:[ |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1342 |
con := thisContext evaluateUnwindActionsUpTo:self. |
328 | 1343 |
]. |
1344 |
||
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1345 |
"oops, if nil, I am not on the calling chain; |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1346 |
(bad bad, unwind action have already been performed. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1347 |
should we check for this situation first and NOT evaluate |
328 | 1348 |
the unwind actions in this case ?) |
1349 |
" |
|
1350 |
con isNil ifTrue:[ |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1351 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1352 |
tried to return to a context which is already dead |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1353 |
(i.e. the method/block has already executed a return) |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1354 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1355 |
^ self invalidReturnOrRestartError:#'unwindThenDo:' with:aBlock |
328 | 1356 |
]. |
1357 |
" |
|
1358 |
now, that all unwind-actions are done, I can use the |
|
1359 |
low-level return ... |
|
1360 |
" |
|
1361 |
^ self returnDoing:aBlock |
|
1 | 1362 |
! ! |
623 | 1363 |
|
1364 |
!Context methodsFor:'printing & storing'! |
|
1365 |
||
1070
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1366 |
argStringFor:someObject |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1367 |
|
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1368 |
|name| |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1369 |
%{ |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1370 |
/* |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1371 |
* special handling for (invalid) free objects. |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1372 |
* these only appear if some primitiveCode does not correctly use SEND macros, |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1373 |
* which may lead to sends to free objects. In normal operation, this 'cannot' happen. |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1374 |
*/ |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1375 |
if (__isNonNilObject(someObject) && (__qClass(someObject)==nil)) { |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1376 |
name = __MKSTRING("FreeObject"); |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1377 |
} |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1378 |
%}. |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1379 |
name notNil ifTrue:[^ name]. |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1380 |
^ someObject displayString |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1381 |
! |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1382 |
|
623 | 1383 |
argsDisplayString |
1384 |
|fullString n "{ Class: SmallInteger }" | |
|
1385 |
||
1386 |
fullString := ''. |
|
1387 |
n := self numArgs. |
|
1388 |
1 to:n do:[:index | |
|
1070
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1389 |
fullString := fullString , ' ' , (self argStringFor:(self at:index)) |
623 | 1390 |
]. |
1391 |
^ fullString |
|
1392 |
! |
|
1393 |
||
6648 | 1394 |
displayArgsOn:aStream |
1395 |
| n "{ Class: SmallInteger }" | |
|
1396 |
||
1397 |
n := self numArgs. |
|
1398 |
1 to:n do:[:index | |
|
1399 |
aStream nextPutAll:(self argStringFor:(self at:index)). |
|
8578 | 1400 |
aStream nextPutAll:' '. |
6648 | 1401 |
]. |
1402 |
! |
|
1403 |
||
623 | 1404 |
displayString |
1405 |
"return a string describing the context - for display in Inspector" |
|
1406 |
||
1407 |
^ self class name , '(' , self printString , ')' |
|
1408 |
! |
|
1409 |
||
6648 | 1410 |
fullPrintAllOn:aStream |
1411 |
"print a full walkback starting at the receiver" |
|
1412 |
||
1413 |
|context| |
|
1414 |
||
1415 |
context := self. |
|
1416 |
[context notNil] whileTrue: [ |
|
1417 |
context fullPrintOn:aStream. |
|
1418 |
aStream cr. |
|
1419 |
context := context sender |
|
1420 |
] |
|
1421 |
||
1422 |
" |
|
1423 |
thisContext fullPrintAllOn:Transcript |
|
1424 |
" |
|
1425 |
||
1426 |
"Created: 15.1.1997 / 18:09:05 / cg" |
|
1427 |
! |
|
1428 |
||
1429 |
fullPrintOn:aStream |
|
1430 |
"print the receiver, selector and args of the context" |
|
1431 |
||
8578 | 1432 |
self receiverPrintString printOn:aStream. |
1433 |
aStream nextPutAll:' '. |
|
1434 |
selector printOn:aStream. |
|
1435 |
||
6648 | 1436 |
self size ~~ 0 ifTrue: [ |
8578 | 1437 |
aStream nextPutAll:' '. |
6648 | 1438 |
self displayArgsOn:aStream |
1439 |
]. |
|
1440 |
aStream nextPutAll:' ['. |
|
1441 |
self lineNumber printOn:aStream. |
|
8578 | 1442 |
aStream nextPutAll:']'. |
6648 | 1443 |
|
1444 |
" |
|
1445 |
thisContext fullPrintOn:Transcript |
|
1446 |
" |
|
1447 |
||
1448 |
"Modified: 20.5.1996 / 10:27:14 / cg" |
|
1449 |
"Created: 15.1.1997 / 18:09:06 / cg" |
|
1450 |
! |
|
1451 |
||
623 | 1452 |
fullPrintString |
1453 |
"return a string describing the context - this includes the linenumber, |
|
1454 |
receiver printString and argument printString" |
|
1455 |
||
1456 |
|s| |
|
1457 |
||
1458 |
s := WriteStream on:String new. |
|
6648 | 1459 |
self fullPrintOn:s. |
623 | 1460 |
^ s contents |
1461 |
||
1462 |
" |
|
1463 |
thisContext fullPrintString |
|
1464 |
" |
|
1465 |
! |
|
1466 |
||
1467 |
methodPrintString |
|
1468 |
"return a string describing the contexts method as 'implementorClass>>selector'" |
|
1469 |
||
1853
09cd1e8df9a2
use new Method>>who interface
Claus Gittinger <cg@exept.de>
parents:
1810
diff
changeset
|
1470 |
|mthd who| |
623 | 1471 |
|
1472 |
mthd := self method. |
|
1473 |
mthd notNil ifTrue:[ |
|
3143 | 1474 |
who := mthd who. |
1475 |
who notNil ifTrue:[ |
|
1476 |
^ who methodClass name , '>>' , who methodSelector |
|
1477 |
] |
|
623 | 1478 |
]. |
1479 |
^ mthd displayString. |
|
1480 |
||
1481 |
" |
|
1482 |
thisContext methodPrintString |
|
1483 |
thisContext sender methodPrintString |
|
1484 |
" |
|
1853
09cd1e8df9a2
use new Method>>who interface
Claus Gittinger <cg@exept.de>
parents:
1810
diff
changeset
|
1485 |
|
09cd1e8df9a2
use new Method>>who interface
Claus Gittinger <cg@exept.de>
parents:
1810
diff
changeset
|
1486 |
"Modified: 1.11.1996 / 16:21:49 / cg" |
623 | 1487 |
! |
1488 |
||
1489 |
printOn:aStream |
|
1490 |
"append a printed description of the receiver onto aStream" |
|
1491 |
||
1492 |
aStream nextPutAll:(self receiverPrintString). |
|
1493 |
aStream space. |
|
4393 | 1494 |
self selector printOn:aStream. |
1495 |
aStream space. |
|
1496 |
aStream nextPutAll:' ['; nextPutAll:self lineNumber printString; nextPutAll:']' . |
|
1497 |
||
623 | 1498 |
! |
1499 |
||
1500 |
receiverPrintString |
|
1501 |
"return a string describing the receiver of the context" |
|
1502 |
||
1503 |
|receiverClass receiverClassName newString implementorClass| |
|
1504 |
||
1070
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1505 |
%{ |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1506 |
/* |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1507 |
* special handling for (invalid) free objects. |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1508 |
* these only appear if some primitiveCode does not correctly use SEND macros, |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1509 |
* which may lead to sends to free objects. In normal operation, this 'cannot' happen. |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1510 |
*/ |
1133 | 1511 |
if (__isNonNilObject(__INST(receiver)) && (__qClass(__INST(receiver))==nil)) { |
3923 | 1512 |
receiverClassName = __MKSTRING("FreeObject"); |
1070
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1513 |
} |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1514 |
%}. |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1515 |
receiverClassName notNil ifTrue:[^ receiverClassName]. |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1516 |
|
623 | 1517 |
receiverClass := receiver class. |
3923 | 1518 |
receiverClass isJavaClass ifTrue:[ |
1519 |
receiverClassName := receiverClass displayString |
|
1520 |
] ifFalse:[ |
|
1521 |
(receiverClass isBehavior |
|
1522 |
and:[receiverClass isMeta |
|
1523 |
and:[receiverClass soleInstance isJavaClass]]) ifTrue:[ |
|
1524 |
"/ receiverClassName := receiverClass soleInstance fullName. |
|
1525 |
receiverClassName := receiverClass name. |
|
1526 |
] ifFalse:[ |
|
1527 |
receiverClassName := receiverClass name. |
|
1528 |
] |
|
1529 |
]. |
|
6197 | 1530 |
(receiverClass == SmallInteger |
1531 |
or:[receiverClass == Float]) ifTrue:[ |
|
3923 | 1532 |
newString := '(' , receiver printString , ') ' , receiverClassName |
623 | 1533 |
] ifFalse:[ |
3923 | 1534 |
newString := receiverClassName |
623 | 1535 |
]. |
1536 |
||
1537 |
selector notNil ifTrue:[ |
|
1538 |
"/ implementorClass := self searchClass whichClassIncludesSelector:selector. |
|
1539 |
||
3923 | 1540 |
" |
1541 |
kludge to avoid slow search for containing class |
|
1542 |
" |
|
1543 |
(selector ~~ #doIt and:[selector ~~ #doIt:]) ifTrue:[ |
|
1544 |
implementorClass := self methodClass. |
|
1545 |
]. |
|
1546 |
||
1547 |
implementorClass notNil ifTrue: [ |
|
1548 |
(implementorClass ~~ receiverClass) ifTrue: [ |
|
1549 |
newString := newString , '>>>', |
|
1550 |
implementorClass name printString |
|
1551 |
] |
|
1552 |
] ifFalse:[ |
|
1553 |
self searchClass ~~ receiverClass ifTrue:[ |
|
1554 |
newString := newString , '>>>' , self searchClass name |
|
1555 |
]. |
|
1556 |
" |
|
1557 |
kludge for doIt - these unbound methods are not |
|
1558 |
found in the classes methodDictionary |
|
1559 |
" |
|
1560 |
(selector ~~ #doIt and:[selector ~~ #doIt:]) ifTrue:[ |
|
1561 |
newString := newString , '>>>**NONE**' |
|
1562 |
] |
|
1563 |
] |
|
623 | 1564 |
]. |
1565 |
||
1566 |
^ newString |
|
6197 | 1567 |
|
1568 |
"Modified: / 16.11.2001 / 16:04:21 / cg" |
|
623 | 1569 |
! ! |
1570 |
||
7257 | 1571 |
!Context methodsFor:'private-accessing'! |
623 | 1572 |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1573 |
markForHandle |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1574 |
"set the mark for exception handle flag in the receiver. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1575 |
The VM needs this to know that some special action is to be performed with |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1576 |
this context - a highly internal mechanism and not for public use." |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1577 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1578 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1579 |
__INST(flags) = (OBJ)((INT)__INST(flags) | __MASKSMALLINT(__HANDLE_MARK)); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1580 |
%} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1581 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1582 |
"Modified: 13.12.1995 / 19:05:22 / cg" |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1583 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1584 |
|
753
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1585 |
markForInterrupt |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1586 |
"set the interrupt flag. |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1587 |
The VM needs this to know that some special action is to be performed with |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1588 |
this context upon return - a highly internal mechanism and not for public use." |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1589 |
|
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1590 |
%{ /* NOCONTEXT */ |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1591 |
__markInterrupted(__ContextInstPtr(self)); |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1592 |
%} |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1593 |
! |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1594 |
|
1727 | 1595 |
markForInterruptOnUnwind |
1596 |
"set the interrupt-on-unwind flag in the receiver. |
|
1597 |
The VM will generate a stepInterrupt, when this context returns or |
|
1598 |
is unwound. This is used by the debugger for faster single-stepping; |
|
1599 |
- a highly internal mechanism and not for public use." |
|
1600 |
||
1601 |
%{ /* NOCONTEXT */ |
|
3508 | 1602 |
__INST(flags) = (OBJ)((INT)__INST(flags) | __MASKSMALLINT(__IRQ_ON_UNWIND)); |
1727 | 1603 |
%} |
1604 |
! |
|
1605 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1606 |
markForRaise |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1607 |
"set the mark for exception raise flag in the receiver. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1608 |
The VM needs this to know that some special action is to be performed with |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1609 |
this context - a highly internal mechanism and not for public use." |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1610 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1611 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1612 |
__INST(flags) = (OBJ)((INT)__INST(flags) | __MASKSMALLINT(__RAISE_MARK)); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1613 |
%} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1614 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1615 |
"Modified: 13.12.1995 / 19:05:22 / cg" |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1616 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1617 |
|
623 | 1618 |
markForUnwind |
749 | 1619 |
"set the mark for unwind flag in the receiver. |
1620 |
The VM needs this to know that some special action is to be performed with |
|
1621 |
this context - a highly internal mechanism and not for public use." |
|
1622 |
||
623 | 1623 |
%{ /* NOCONTEXT */ |
1133 | 1624 |
__INST(flags) = (OBJ)((INT)__INST(flags) | __MASKSMALLINT(__UNWIND_MARK)); |
623 | 1625 |
%} |
749 | 1626 |
|
1627 |
"Modified: 13.12.1995 / 19:05:22 / cg" |
|
623 | 1628 |
! |
1629 |
||
5780 | 1630 |
setHome:aContext |
1631 |
"set the homeContext. |
|
1632 |
DANGER: this is for experimental, internal use only (byteCode interpreters)" |
|
1633 |
||
1634 |
home := aContext. |
|
1635 |
! |
|
1636 |
||
1637 |
setSender:aContext |
|
1638 |
"set the sender of the context. |
|
1639 |
DANGER: this is for experimental, internal use only (byteCode interpreters)" |
|
1640 |
||
1641 |
%{ /* NOCONTEXT */ |
|
1642 |
__INST(sender_) = aContext; |
|
1643 |
%} |
|
1644 |
! |
|
1645 |
||
623 | 1646 |
unmarkForUnwind |
749 | 1647 |
"clear the mark for unwind flag in the receiver. |
1648 |
The VM needs this to know that some special action is to be performed with |
|
1649 |
this context - a highly internal mechanism and not for public use." |
|
1650 |
||
623 | 1651 |
%{ /* NOCONTEXT */ |
1133 | 1652 |
__INST(flags) = (OBJ)((INT)__INST(flags) & ~__MASKSMALLINT(__UNWIND_MARK)); |
623 | 1653 |
%} |
1654 |
! ! |
|
1655 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1656 |
!Context methodsFor:'searching'! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1657 |
|
8284 | 1658 |
findExceptional |
1659 |
"walk along the sender chain (starting with the sender), |
|
1660 |
for a context which is marked as handle or raise context. |
|
1661 |
This non-standard interface is only to be used by exception" |
|
1662 |
||
1663 |
"/ this could have been (actually: was) implemented as: |
|
1664 |
"/ |
|
1665 |
"/ |con| |
|
1666 |
"/ |
|
1667 |
"/ con := self. |
|
1668 |
"/ [con notNil] whileTrue:[ |
|
1669 |
"/ [con isHandleContext] ifTrue:[^con]. |
|
1670 |
"/ [con isRaiseContext] ifTrue:[^con]. |
|
1671 |
"/ con := con sender. |
|
1672 |
"/ ]. |
|
1673 |
"/ ^ nil |
|
1674 |
"/ |
|
1675 |
"/ and the code below does exactly this (somewhat faster, though). |
|
1676 |
"/ |
|
1677 |
"/ (it avoids referencing all intermediate contexts, which would mark them special, |
|
1678 |
"/ although they aren't really - this is expert knowledge, no need to understand that ...) |
|
1679 |
||
1680 |
%{ /* NOCONTEXT */ |
|
1681 |
||
1682 |
OBJ theContext; |
|
1683 |
||
1684 |
theContext = self; |
|
1685 |
while (__isNonNilObject(theContext)) { |
|
1686 |
if ((INT)(__ContextInstPtr(theContext)->c_flags) & __MASKSMALLINT(__HANDLE_MARK|__RAISE_MARK)) { |
|
1687 |
if (__isLazy(theContext)) { |
|
1688 |
__PATCHUPCONTEXT(theContext); |
|
1689 |
} |
|
1690 |
||
1691 |
if (! __isNonLIFO(theContext)) { |
|
1692 |
/* |
|
1693 |
* to be prepared for the worst situation |
|
1694 |
* (the sender is not stored, so the trap won't catch it) |
|
1695 |
* make the writeBarrier trigger manually. |
|
1696 |
* We'll see, if this is really required. |
|
1697 |
*/ |
|
1698 |
theContext->o_space |= CATCHMARK; |
|
1699 |
#if 0 |
|
1700 |
_markNonLIFO(theContext); |
|
1701 |
#endif |
|
1702 |
} |
|
1703 |
RETURN (theContext); |
|
1704 |
} |
|
1705 |
theContext = __ContextInstPtr(theContext)->c_sender; |
|
1706 |
} |
|
1707 |
%}. |
|
1708 |
^ nil |
|
1709 |
! |
|
1710 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1711 |
findNextContextWithSelector:selector1 or:selector2 or:selector3 |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1712 |
"walk along the sender chain (starting with the sender), |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1713 |
for a context with either one of the given selectors. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1714 |
This non-standard interface is only to be used by exception" |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1715 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1716 |
"/ this could have been (actually: was) implemented as: |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1717 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1718 |
"/ |con| |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1719 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1720 |
"/ con := self sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1721 |
"/ [con notNil] whileTrue:[ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1722 |
"/ con selector == aSelector ifTrue:[^ con]. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1723 |
"/ con := con sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1724 |
"/ ]. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1725 |
"/ ^ nil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1726 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1727 |
"/ and the code below does exactly this (somewhat faster, though). |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1728 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1729 |
"/ (it avoids referencing all intermediate contexts, which would mark them special, |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1730 |
"/ although they aren't really - this is expert knowledge, no need to understand that ...) |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1731 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1732 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1733 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1734 |
OBJ theContext; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1735 |
OBJ sel; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1736 |
OBJ __FETCHSELECTOR(); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1737 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1738 |
theContext = __INST(sender_); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1739 |
while (__isNonNilObject(theContext)) { |
5422 | 1740 |
if (__isLazy(theContext)) { |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1741 |
#ifdef TRADITIONAL_STACK_FRAME |
5422 | 1742 |
sel = __FETCHSELECTOR(theContext); |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1743 |
#else |
5422 | 1744 |
/* mhmh - not really needed */ |
1745 |
__PATCHUPCONTEXT(theContext); |
|
1746 |
sel = __ContextInstPtr(theContext)->c_selector; |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1747 |
#endif |
5422 | 1748 |
} else { |
1749 |
sel = __ContextInstPtr(theContext)->c_selector; |
|
1750 |
} |
|
1751 |
||
1752 |
if ((sel == selector1) |
|
1753 |
|| ((selector2 != nil) && (sel == selector2)) |
|
1754 |
|| ((selector3 != nil) && (sel == selector3))) { |
|
1755 |
if (__isLazy(theContext)) { |
|
1756 |
__PATCHUPCONTEXT(theContext); |
|
1757 |
} |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1758 |
|
5422 | 1759 |
if (! __isNonLIFO(theContext)) { |
1760 |
/* |
|
1761 |
* to be prepared for the worst situation |
|
1762 |
* (the sender is not stored, so the trap wont catch it) |
|
1763 |
* make the writeBarrier trigger manually. |
|
1764 |
* We'll see, if this is really required. |
|
1765 |
*/ |
|
1766 |
theContext->o_space |= CATCHMARK; |
|
1767 |
_markNonLIFO(theContext); |
|
1768 |
} |
|
1769 |
RETURN (theContext); |
|
1770 |
} |
|
1771 |
theContext = __ContextInstPtr(theContext)->c_sender; |
|
1772 |
} |
|
1773 |
RETURN (nil); |
|
1774 |
%}. |
|
1775 |
" |
|
1776 |
|con sel| |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1777 |
|
5422 | 1778 |
con := self sender. |
1779 |
[con notNil] whileTrue:[ |
|
1780 |
sel := con selector. |
|
1781 |
sel == selector1 ifTrue:[^ con]. |
|
1782 |
(selector2 notNil and:[sel == selector2]) ifTrue:[^ con]. |
|
1783 |
(selector3 notNil and:[sel == selector3]) ifTrue:[^ con]. |
|
1784 |
con := con sender. |
|
1785 |
]. |
|
1786 |
^ nil |
|
1787 |
" |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1788 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1789 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1790 |
findNextUnwindContextOr:aContext |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1791 |
"walk along the sender chain (starting at the sender), |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1792 |
for a context marked for unwindAction or aContext. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1793 |
This non-standard interface is only to be used by mySelf" |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1794 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1795 |
"/ this could have been (actually: was) implemented as: |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1796 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1797 |
"/ |con| |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1798 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1799 |
"/ con := self sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1800 |
"/ [con notNil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1801 |
"/ and:[con ~~ aContext |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1802 |
"/ and:[con isUnwindContext not]]] whileTrue:[con := con sender]. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1803 |
"/ ^ con |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1804 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1805 |
"/ and the code below does exactly this (somewhat faster, though). |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1806 |
"/ (it avoids referencing all intermediate contexts, which would mark them special, |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1807 |
"/ although they aren't really - this is expert knowledge, no need to understand that ...) |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1808 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1809 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1810 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1811 |
OBJ theContext; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1812 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1813 |
if (self == aContext) { |
4485 | 1814 |
RETURN (self); |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1815 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1816 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1817 |
theContext = __INST(sender_); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1818 |
while (__isNonNilObject(theContext)) { |
4485 | 1819 |
if ((theContext == aContext) |
1820 |
|| ((INT)(__ContextInstPtr(theContext)->c_flags) & __MASKSMALLINT(__UNWIND_MARK))) { |
|
1821 |
if (__isLazy(theContext)) { |
|
1822 |
__PATCHUPCONTEXT(theContext); |
|
1823 |
} |
|
1824 |
if (! __isNonLIFO(theContext)) { |
|
1825 |
/* |
|
1826 |
* to be prepared for the worst situation |
|
1827 |
* (the sender is not stored, so the trap wont catch it) |
|
1828 |
* make the writeBarrier trigger manually. |
|
1829 |
* We'll see, if this is really required. |
|
1830 |
*/ |
|
1831 |
theContext->o_space |= CATCHMARK; |
|
1832 |
#if 0 |
|
1833 |
_markNonLIFO(theContext); |
|
1834 |
#endif |
|
1835 |
} |
|
1836 |
RETURN (theContext); |
|
1837 |
} |
|
1838 |
theContext = __ContextInstPtr(theContext)->c_sender; |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1839 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1840 |
%}. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1841 |
^ nil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1842 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1843 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1844 |
findSpecialHandle:findHandleContext raise:findRaiseContext |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1845 |
"walk along the sender chain (starting with the sender), |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1846 |
for a context which is marked as handle or raise context. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1847 |
This non-standard interface is only to be used by exception" |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1848 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1849 |
"/ this could have been (actually: was) implemented as: |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1850 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1851 |
"/ |con| |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1852 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1853 |
"/ con := self sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1854 |
"/ [con notNil] whileTrue:[ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1855 |
"/ (findHandleContext and:[con isHandleContext]) ifTrue:[^con]. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1856 |
"/ (findRaiseContext and:[con isRaiseContext]) ifTrue:[^con]. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1857 |
"/ con := con sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1858 |
"/ ]. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1859 |
"/ ^ nil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1860 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1861 |
"/ and the code below does exactly this (somewhat faster, though). |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1862 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1863 |
"/ (it avoids referencing all intermediate contexts, which would mark them special, |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1864 |
"/ although they aren't really - this is expert knowledge, no need to understand that ...) |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1865 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1866 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1867 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1868 |
OBJ theContext; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1869 |
int flagMask = 0; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1870 |
INT mask; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1871 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1872 |
if (findHandleContext == true) |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1873 |
flagMask = __HANDLE_MARK; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1874 |
if (findRaiseContext == true) |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1875 |
flagMask |= __RAISE_MARK; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1876 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1877 |
mask = __MASKSMALLINT(flagMask); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1878 |
theContext = __INST(sender_); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1879 |
while (__isNonNilObject(theContext)) { |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1880 |
if ((INT)(__ContextInstPtr(theContext)->c_flags) & mask) { |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1881 |
if (__isLazy(theContext)) { |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1882 |
__PATCHUPCONTEXT(theContext); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1883 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1884 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1885 |
if (! __isNonLIFO(theContext)) { |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1886 |
/* |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1887 |
* to be prepared for the worst situation |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1888 |
* (the sender is not stored, so the trap won't catch it) |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1889 |
* make the writeBarrier trigger manually. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1890 |
* We'll see, if this is really required. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1891 |
*/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1892 |
theContext->o_space |= CATCHMARK; |
4485 | 1893 |
#if 0 |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1894 |
_markNonLIFO(theContext); |
4485 | 1895 |
#endif |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1896 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1897 |
RETURN (theContext); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1898 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1899 |
theContext = __ContextInstPtr(theContext)->c_sender; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1900 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1901 |
%}. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1902 |
^ nil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1903 |
! ! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1904 |
|
1051 | 1905 |
!Context methodsFor:'special accessing'! |
1906 |
||
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1907 |
argAndVarNames |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1908 |
"helper: given a context, return a collection of arg&var names" |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1909 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1910 |
|homeContext method block numArgs numVars m src |
8217 | 1911 |
sel isDoIt blocksLineNr extractFromBlock sender| |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1912 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1913 |
numArgs := self numArgs. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1914 |
numVars := self numVars. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1915 |
(numArgs == 0 and:[numVars == 0]) ifTrue:[^ #()]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1916 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1917 |
homeContext := self methodHome. |
7652 | 1918 |
homeContext notNil ifTrue:[ |
1919 |
sel := homeContext selector. |
|
1920 |
method := homeContext method. |
|
1921 |
]. |
|
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1922 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1923 |
extractFromBlock := |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1924 |
[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1925 |
|blockNode argNames varNames vars args| |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1926 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1927 |
blockNode := Compiler |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1928 |
blockAtLine:blocksLineNr |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1929 |
in:m |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1930 |
orSource:src |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1931 |
numArgs:numArgs |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1932 |
numVars:numVars. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1933 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1934 |
blockNode notNil ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1935 |
argNames := #(). |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1936 |
varNames := #(). |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1937 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1938 |
numArgs > 0 ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1939 |
vars := blockNode arguments. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1940 |
vars size > 0 ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1941 |
argNames := vars collect:[:var | var name] |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1942 |
] |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1943 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1944 |
numVars > 0 ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1945 |
vars := blockNode variables. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1946 |
vars size > 0 ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1947 |
varNames := vars collect:[:var | var name]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1948 |
] |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1949 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1950 |
^ argNames , varNames |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1951 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1952 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1953 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1954 |
"/ #doIt needs special handling below |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1955 |
isDoIt := (sel == #'doIt') or:[sel == #'doIt:']. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1956 |
self isBlockContext ifFalse:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1957 |
isDoIt ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1958 |
method notNil ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1959 |
"/ special for #doIt |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1960 |
m := nil. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1961 |
src := ('[' , method source , '\]') withCRs. |
8217 | 1962 |
"/ blocksLineNr := self lineNumber. |
8242
594cfd2150f7
oops - must care for doIt contexts
Claus Gittinger <cg@exept.de>
parents:
8217
diff
changeset
|
1963 |
blocksLineNr := (self home ? self) lineNumber. |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1964 |
extractFromBlock value. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1965 |
] |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1966 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1967 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1968 |
method notNil ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1969 |
^ method methodArgAndVarNames. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1970 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1971 |
^ #() |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1972 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1973 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1974 |
method notNil ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1975 |
isDoIt ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1976 |
"/ special for #doIt |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1977 |
"/ my source is found in the method. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1978 |
m := nil. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1979 |
src := ('[' , method source , '\]') withCRs. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1980 |
] ifFalse:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1981 |
m := method. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1982 |
src := nil. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1983 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1984 |
blocksLineNr := self lineNumber. |
8020 | 1985 |
extractFromBlock value. |
7747
27be5f627b03
fixed argAndVarNames for inner blocks.
Claus Gittinger <cg@exept.de>
parents:
7652
diff
changeset
|
1986 |
blocksLineNr := self home lineNumber. |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1987 |
extractFromBlock value. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1988 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1989 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1990 |
blocksLineNr isNil ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1991 |
self isBlockContext ifTrue:[ |
8217 | 1992 |
sender := self sender. |
1993 |
(sender notNil |
|
1994 |
and:[sender receiver isBlock |
|
1995 |
and:[sender selector startsWith:'value']]) |
|
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1996 |
ifTrue:[ |
8217 | 1997 |
block := sender receiver. |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1998 |
src := block source. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
1999 |
src isNil ifTrue:[ |
8488 | 2000 |
self error:'no source'. |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2001 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2002 |
blocksLineNr := 1. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2003 |
extractFromBlock value. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2004 |
]. |
8217 | 2005 |
sender := nil. |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2006 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2007 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2008 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2009 |
^ #() |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2010 |
! |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2011 |
|
4557 | 2012 |
canResume |
2013 |
"return true, if the receiver allows to be resumed. |
|
2014 |
Due to the implementation, this requires that the context which |
|
2015 |
is right below the receiver is returnable." |
|
2016 |
||
2017 |
|theContext| |
|
2018 |
||
2019 |
" |
|
2020 |
starting with this context, find the one below |
|
2021 |
(i.e. the one that I have called) and return from it. |
|
2022 |
" |
|
2023 |
%{ |
|
2024 |
OBJ sndr; |
|
2025 |
||
2026 |
theContext = __thisContext; |
|
2027 |
while (theContext != nil) { |
|
2028 |
sndr = __ContextInstPtr(theContext)->c_sender; |
|
2029 |
if (sndr == self) break; |
|
2030 |
theContext = sndr; |
|
2031 |
} |
|
2032 |
if (theContext != nil) { |
|
2033 |
if (__isLazy(theContext)) { |
|
2034 |
__PATCHUPCONTEXT(theContext); |
|
2035 |
} |
|
2036 |
} |
|
2037 |
%}. |
|
2038 |
theContext isNil ifTrue:[ |
|
2039 |
^ false |
|
2040 |
]. |
|
2041 |
^ theContext canReturn |
|
2042 |
! |
|
2043 |
||
1051 | 2044 |
canReturn |
2045 |
"return true, if the receiver allows returning through it. |
|
4557 | 2046 |
Blocks, (currently) always return false. |
2646 | 2047 |
Methods which contain a (non-inlined) block are always |
2048 |
returnable - for other methods, it depends on how the system |
|
2049 |
was compiled (stc flag +/-optContext). |
|
2050 |
If it was compiled with +optContext, methods are compiled |
|
4557 | 2051 |
non returnable, unless a return-pragma was present in the method. |
2646 | 2052 |
Since this saves some administrative work in every method |
2053 |
invocation and makes overall execution faster, the system classes |
|
2054 |
are all compiled with this flag turned on." |
|
1051 | 2055 |
|
2056 |
%{ /* NOCONTEXT */ |
|
2057 |
||
3508 | 2058 |
RETURN ( ((INT)(__INST(flags)) & __MASKSMALLINT(__CANNOT_RETURN)) ? false : true ); |
5441 | 2059 |
%}. |
2060 |
^ true |
|
1051 | 2061 |
! |
2062 |
||
1492 | 2063 |
hasStackToShow |
2646 | 2064 |
"private interface to the debugger. |
2065 |
Smalltalk contexts return false here - other language frames |
|
2066 |
(i.e. Java frames) may want to show the evaluation stack" |
|
2067 |
||
1492 | 2068 |
^ false |
2069 |
||
2070 |
"Created: 28.6.1996 / 14:48:39 / cg" |
|
2646 | 2071 |
"Modified: 13.5.1997 / 16:31:12 / cg" |
1492 | 2072 |
! |
2073 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2074 |
isHandleContext |
4505 | 2075 |
"return true, if this is a context with exception-handle flag set" |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2076 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2077 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2078 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__HANDLE_MARK)) ? true : false ); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2079 |
%} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2080 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2081 |
|
1051 | 2082 |
isNonLifo |
2646 | 2083 |
"return true, if this is a nonLifo context. |
2084 |
A nonLifo context is one that is still on the machine stack, |
|
2085 |
but has a reference taken and needs to be converted to a real |
|
2086 |
object (in objectMemory) when the method/block returns. |
|
2087 |
You dont have to understand this - this is a special ST/X |
|
2088 |
debug query, which may be removed without notice." |
|
1051 | 2089 |
|
2090 |
%{ /* NOCONTEXT */ |
|
1133 | 2091 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__NONLIFO)) ? true : false ); |
1051 | 2092 |
%} |
2093 |
! |
|
2094 |
||
2095 |
isOnMachineStack |
|
2096 |
"return true, if this is a machine stack context as opposed to a |
|
2646 | 2097 |
real heap context. |
2098 |
You dont have to understand this - this is a special ST/X |
|
2099 |
debug query, which may be removed without notice." |
|
1051 | 2100 |
|
2101 |
%{ /* NOCONTEXT */ |
|
2102 |
RETURN ( (__qSpace(self) >= STACKSPACE) ? true : false ); |
|
2103 |
%} |
|
2104 |
! |
|
2105 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2106 |
isRaiseContext |
4505 | 2107 |
"return true, if this is a context with exception-raise flag set" |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2108 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2109 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2110 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__RAISE_MARK)) ? true : false ); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2111 |
%} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2112 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2113 |
|
1051 | 2114 |
isSpecial |
2115 |
"return true, if this is either a nonLifo or interrupted context" |
|
2116 |
||
2117 |
%{ /* NOCONTEXT */ |
|
1133 | 2118 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__SPECIAL)) ? true : false ); |
1051 | 2119 |
%} |
2120 |
! |
|
2121 |
||
2122 |
isUnwindContext |
|
2123 |
"return true, if this is an unwindContext" |
|
2124 |
||
2125 |
%{ /* NOCONTEXT */ |
|
1133 | 2126 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__UNWIND_MARK)) ? true : false ); |
1051 | 2127 |
%} |
8578 | 2128 |
! |
2129 |
||
2130 |
tempNames |
|
2131 |
"helper: given a context, return a collection of arg, var and temporary names" |
|
2132 |
||
2133 |
|names nTemps| |
|
2134 |
||
2135 |
names := self argAndVarNames. |
|
2136 |
(nTemps := self numTemps) > 0 ifTrue:[ |
|
2137 |
^ names , ((1 to:nTemps) collect:[:idx | '_tmp' , idx printString]). |
|
2138 |
]. |
|
2139 |
^ names. |
|
1051 | 2140 |
! ! |
2141 |
||
623 | 2142 |
!Context methodsFor:'testing'! |
2143 |
||
2144 |
isBlockContext |
|
2145 |
"return true, iff the receiver is a BlockContext, false otherwise" |
|
2146 |
||
2147 |
^ false |
|
2148 |
! |
|
2149 |
||
2150 |
isContext |
|
2151 |
"return true, iff the receiver is a Context, false otherwise" |
|
2152 |
||
2153 |
^ true |
|
2154 |
! |
|
2155 |
||
2156 |
isRecursive |
|
2157 |
"return true, if this context is one of a recursive send of the same |
|
1483 | 2158 |
selector to the same receiver before. |
2159 |
Here, different arguments are ignored - i.e. only the same method |
|
2160 |
counts for recursiveness. |
|
623 | 2161 |
Used to detect recursive errors or recursive printing - for example." |
2162 |
||
2291
af7652b82404
avoid touching contexts (making them nonLifo) when searching for unwind-contexts,
Claus Gittinger <cg@exept.de>
parents:
2285
diff
changeset
|
2163 |
|c count "{Class: SmallInteger }" myMethodsClass| |
af7652b82404
avoid touching contexts (making them nonLifo) when searching for unwind-contexts,
Claus Gittinger <cg@exept.de>
parents:
2285
diff
changeset
|
2164 |
|
af7652b82404
avoid touching contexts (making them nonLifo) when searching for unwind-contexts,
Claus Gittinger <cg@exept.de>
parents:
2285
diff
changeset
|
2165 |
count := 0. |
af7652b82404
avoid touching contexts (making them nonLifo) when searching for unwind-contexts,
Claus Gittinger <cg@exept.de>
parents:
2285
diff
changeset
|
2166 |
|
2893 | 2167 |
c := self findNextContextWithSelector:selector or:nil or:nil. |
623 | 2168 |
[c notNil] whileTrue:[ |
3143 | 2169 |
(c receiver == receiver) ifTrue:[ |
2170 |
" |
|
2171 |
stupid: the current ST/X context does not include |
|
2172 |
the method, but the class, in which the search started ... |
|
2173 |
" |
|
2291
af7652b82404
avoid touching contexts (making them nonLifo) when searching for unwind-contexts,
Claus Gittinger <cg@exept.de>
parents:
2285
diff
changeset
|
2174 |
myMethodsClass isNil ifTrue:[ |
3143 | 2175 |
myMethodsClass := self methodClass. |
2291
af7652b82404
avoid touching contexts (making them nonLifo) when searching for unwind-contexts,
Claus Gittinger <cg@exept.de>
parents:
2285
diff
changeset
|
2176 |
]. |
3143 | 2177 |
c methodClass == myMethodsClass ifTrue:[ |
2178 |
^ true |
|
2179 |
] |
|
2180 |
]. |
|
2181 |
c := c findNextContextWithSelector:selector or:nil or:nil. |
|
2135
6bd144c1c358
newStyle info & error messages
Claus Gittinger <cg@exept.de>
parents:
1853
diff
changeset
|
2182 |
|
3143 | 2183 |
" |
2184 |
this special test was added to get out after a while |
|
2185 |
if the sender chain is corrupt - this gives us at least |
|
2186 |
a chance to find those errors. |
|
2187 |
" |
|
2188 |
count := count + 1. |
|
2189 |
count >= 100000 ifTrue:[ |
|
2190 |
'Context [warning]: bad context chain' errorPrintCR. |
|
2191 |
^ true |
|
2192 |
] |
|
623 | 2193 |
]. |
2194 |
^ false |
|
1483 | 2195 |
|
2135
6bd144c1c358
newStyle info & error messages
Claus Gittinger <cg@exept.de>
parents:
1853
diff
changeset
|
2196 |
"Modified: 10.1.1997 / 17:34:26 / cg" |
623 | 2197 |
! ! |
2198 |
||
1810 | 2199 |
!Context class methodsFor:'documentation'! |
749 | 2200 |
|
2201 |
version |
|
8578 | 2202 |
^ '$Header: /cvs/stx/stx/libbasic/Context.st,v 1.128 2004-09-22 09:53:14 cg Exp $' |
749 | 2203 |
! ! |
7257 | 2204 |
|
623 | 2205 |
Context initialize! |