author | Jan Vrany <jan.vrany@fit.cvut.cz> |
Thu, 26 Aug 2010 11:12:57 +0100 | |
branch | jv |
changeset 17797 | 71451ae83564 |
parent 17780 | b6e42c92eba0 |
child 17804 | 4a18f0ab5738 |
permissions | -rw-r--r-- |
1 | 1 |
" |
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COPYRIGHT (c) 1988 by Claus Gittinger |
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All Rights Reserved |
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|
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This software is furnished under a license and may be used |
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only in accordance with the terms of that license and with the |
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inclusion of the above copyright notice. This software may not |
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be provided or otherwise made available to, or used by, any |
|
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other person. No t itle to or ownership of the software is |
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hereby transferred. |
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" |
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"{ Package: 'stx:libbasic' }" |
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||
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Object variableSubclass:#Context |
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instanceVariableNames:'flags sender* home receiver selector searchClass method lineNr |
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retvalTemp handle*' |
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classVariableNames:'InvalidReturnSignal SingleStepInterruptRequest' |
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poolDictionaries:'' |
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category:'Kernel-Methods' |
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! |
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||
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!Context class methodsFor:'documentation'! |
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copyright |
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" |
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COPYRIGHT (c) 1988 by Claus Gittinger |
|
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All Rights Reserved |
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|
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This software is furnished under a license and may be used |
|
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only in accordance with the terms of that license and with the |
|
31 |
inclusion of the above copyright notice. This software may not |
|
32 |
be provided or otherwise made available to, or used by, any |
|
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other person. No t itle to or ownership of the software is |
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hereby transferred. |
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" |
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! |
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||
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documentation |
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" |
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Contexts represent the stack frame objects, which keep the processing |
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state of a method or block (i.e. its local variables, temporaries etc.) |
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Every message send adds a context to a chain, which can be traced back via |
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the sender field. The context of the currently active method is always |
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accessable via the pseuodoVariable called 'thisContext'. |
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(The actual implementation uses the machines stack for this, building real |
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contexts on demand only). |
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|
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For both method- and block-contexts, the layout is the same. |
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For method contexts, the home-field is nil, while for block contexts the home- |
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field is either the context of its surrounding block (i.e. the context of the |
51 |
block, in which the receiving block was created, if its a nested block) or of |
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its home method. |
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Contexts of cheap blocks do not have a home context - their home field is |
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also nil. |
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Currently, contexts do not contain a reference to the method or block which |
58 |
created it - this is not needed for program execution, but could get the debugger |
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somewhat into trouble: it has to search the class hierarchy for receiver/selector |
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combinations to find the method. This usually works, but fails in case of methods |
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which are not anchored in any class - especially leading to problems with wrapper- |
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and lazy methods. Also, Method>>valueWithReceiver - type of invocations cannot |
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be easily debugged. |
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Therefore, the implementation may be changed in the near future, to include a |
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field for the method/block, and set it in the VM during program execution. |
66 |
(there may be some small performance penalty for this, though). |
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||
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LineNumbers vs. program counter: |
69 |
||
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Due to the compilation to machine code, methods and/or block do not |
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always (actually: do seldom) contain bytecodes. Thus, there is no such concept |
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as a bytecode p-counter. To support debugging, the linenumber within the |
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original source is instead remembered when a send or loop entry is performed. |
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Since linenumbers are not always sufficient for debugging (multiple sends in one |
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line), this may be changed in future versions to a character offset, giving |
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the position of the selector in the source. |
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Restartable / Returnable contexts: |
79 |
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In previous versions (up to ST/X 2.10.5), every method stored enough |
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information in the context for that one to be restartable later (for example, |
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via the debuggers restart button). With 2.10.6, this is now an stc-compiler |
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option, and the system as delivered is compiled to only create restartable |
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contexts for those which contain blocks. This resulted in an overall speedup of |
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roughly 10-20% percent, depending on the type of CPU. However, it makes most |
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methods non-restartable (however, abort, signal handling and unwind blocks work |
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as usual). |
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In practice, this was reported to be not a severe limitation and all users were happy |
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to trade the increased performance for that slight inconvenience. |
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(during development, this is seldom a problem, since interpreted methods are always |
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returnable and restartable) |
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If you do not like this (and you are a happy owner of the full distribution), you |
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should recompile all classes with stc's '-optContext' flag. |
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Resuming contexts: |
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Strictly speaking, ST/X does not support a context to be resumed. However, |
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it does support a forced return (i.e. non-local-return) from a context. |
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Thus, resume of a context is implemented by forcing a return from the context |
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which was created by the method called from the first one. The effect is the same. |
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||
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Returning from a dead method: |
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||
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Blockreturn from an outlived context (i.e. its home method has already returned) |
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is now rewarded by an invalidReturn exception - it used to be a noop in previous |
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releases (The blue book described this to be a noop, but other smalltalk implementations |
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changed this to be an invalid operation - good decision) |
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[instance variables:] |
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flags <SmallInteger> used by the VM; never touch. |
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contains info about number of args, |
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locals and temporaries. |
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|
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sender <Context> the 'calling / sending' context |
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This is not directly accessable, since it may |
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be a lazy context (i.e. an empty frame). |
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The #sender method cares for this. |
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home <Context> the context, where this block was |
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created, or nil if its a method context |
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There are also cheap blocks, which do |
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not need a reference to the home context, |
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for those, its nil too. |
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receiver <Object> the receiver of this message |
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selector <Symbol> the selector of this message |
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searchClass <Class> the class, where the message lookup started |
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(for super sends) or nil, for regular sends. |
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lineNr <SmallInteger> the position where the context left off |
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(kind of p-counter). Only the low 16bits |
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are valid. |
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retValTemp nil temporary - always nil, when you see the context |
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(used in the VM as temporary) |
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handle *noObject* used by the VM; not accessable, not an object |
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method the corresponding method |
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||
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<indexed> arguments of the send followed by |
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locals of the method/block followed by |
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temporaries. |
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[errors:] |
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CannotReturnError raised when a block tries |
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to return ('^') from a method context |
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which itself has already returned |
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(i.e. there is no place to return to) |
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WARNING: layout and size known by the compiler and runtime system - do not change. |
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[author:] |
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Claus Gittinger |
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[see also:] |
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Block Process Method |
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( contexts, stacks & unwinding : programming/contexts.html) |
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" |
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! ! |
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!Context class methodsFor:'initialization'! |
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initialize |
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"/ InvalidReturnSignal isNil ifTrue:[ |
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"/ InvalidReturnSignal := ErrorSignal newSignalMayProceed:true. |
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"/ InvalidReturnSignal nameClass:self message:#invalidReturnSignal. |
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"/ InvalidReturnSignal notifierString:'invalid return; method cannot return twice'. |
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"/ |
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CannotReturnError notifierString:'invalid return; method cannot return twice'. |
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CannotResumeError notifierString:'invalid resume'. |
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SingleStepInterruptRequest isNil ifTrue:[ |
178 |
SingleStepInterruptRequest := QuerySignal new. |
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SingleStepInterruptRequest nameClass:self message:#singleStepInterruptRequest. |
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SingleStepInterruptRequest notifierString:'single step'. |
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] |
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"Modified: 6.5.1996 / 16:46:03 / cg" |
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! ! |
185 |
||
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!Context class methodsFor:'Signal constants'! |
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cannotResumeSignal |
189 |
"return the signal used when a method is tried to be resumed, which cannot" |
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^ CannotResumeError |
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! |
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cannotReturnSignal |
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"return the signal used when a method is tried to be returned twice |
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or, when some dead context is unwound or restarted." |
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^ CannotReturnError |
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! |
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||
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invalidReturnSignal |
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"return the signal used when a method is tried to be returned twice |
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or, when some dead context is unwound or restarted." |
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||
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<resource: #obsolete> |
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self obsoleteMethodWarning:'use #cannotReturnSignal'. |
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^ self cannotReturnSignal. |
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! |
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singleStepInterruptRequest |
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"return the dummy query signal to ask for single stepping" |
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^ SingleStepInterruptRequest |
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"Created: 6.5.1996 / 16:46:32 / cg" |
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! ! |
217 |
||
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!Context class methodsFor:'error handling'! |
219 |
||
220 |
showWhereWeCameFrom |
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"show the stack backtrace: at least 4 levels, or until the first |
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send to a non-collection object (because we want to know, |
223 |
which non-collection send invoked a bad collection-method)." |
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224 |
||
225 |
|con count| |
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226 |
||
227 |
con := thisContext sender sender. |
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count := 0. |
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[ |
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(' from ' , con printString) errorPrintCR. |
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con := con sender. |
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count := count + 1. |
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] doWhile:[con notNil and:[count < 5 or:[con receiver isCollection]]]. |
234 |
"/ one more |
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con notNil ifTrue:[ |
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(' from ' , con printString) errorPrintCR. |
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]. |
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239 |
" |
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#() asSet add:nil |
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" |
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! ! |
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||
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!Context class methodsFor:'queries'! |
3 | 245 |
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isBuiltInClass |
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"return true if this class is known by the run-time-system. |
248 |
Here, true is returned." |
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^ true |
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"Modified: 23.4.1996 / 15:58:00 / cg" |
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! ! |
254 |
||
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!Context class methodsFor:'special searching'! |
256 |
||
257 |
findFirstSpecialHandle:searchForHandle raise:searchForRaise |
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|c| |
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259 |
||
260 |
%{ |
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261 |
OBJ __c__; |
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263 |
__c__ = __ContextInstPtr(__thisContext)->c_sender; |
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if (!__isNonNilObject(__c__)) { |
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265 |
RETURN(nil) |
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} |
4485 | 267 |
if (__isLazy(__c__)) { |
268 |
__PATCHUPCONTEXT(__c__); |
|
269 |
} |
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c = __c__; |
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%}. |
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^ c findSpecialHandle:searchForHandle raise:searchForRaise |
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! ! |
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||
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!Context methodsFor:'Compatibility-Squeak'! |
276 |
||
277 |
longStack |
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278 |
^ String streamContents:[:s | |
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279 |
self fullPrintAllOn:s |
|
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] |
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! ! |
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282 |
||
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!Context methodsFor:'Compatibility-VW'! |
5983 | 284 |
|
285 |
resumeWith:value |
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286 |
"same as #resume: - visualWorks compatibility" |
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287 |
||
288 |
self resume:value |
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! ! |
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290 |
||
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!Context methodsFor:'accessing'! |
292 |
||
293 |
argAt:n |
|
294 |
"return the n'th argument" |
|
295 |
||
1726 | 296 |
n > self numArgs ifTrue:[ |
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^ self error:'invalid arg access' |
1726 | 298 |
]. |
623 | 299 |
^ self at:n |
1726 | 300 |
|
301 |
"Modified: 12.10.1996 / 21:44:28 / cg" |
|
623 | 302 |
! |
303 |
||
304 |
argAt:n put:value |
|
305 |
"set the n'th argument - useful when the receiver should be restarted" |
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154 | 306 |
|
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n > self numArgs ifTrue:[ |
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^ self error:'invalid arg access' |
1726 | 309 |
]. |
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self at:n put:value. |
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311 |
^ value |
1726 | 312 |
|
313 |
"Modified: 12.10.1996 / 21:44:32 / cg" |
|
623 | 314 |
! |
315 |
||
316 |
args |
|
317 |
"return an array filled with the arguments of this context" |
|
318 |
||
319 |
|n| |
|
320 |
||
321 |
n := self numArgs. |
|
3130 | 322 |
n == 0 ifTrue:[ |
17757 | 323 |
"/ little optimization here - avaoid creating empty containers |
324 |
^ #() |
|
3130 | 325 |
]. |
623 | 326 |
^ (Array new:n) replaceFrom:1 to:n with:self. |
327 |
! |
|
154 | 328 |
|
623 | 329 |
argsAndVars |
330 |
"return an array filled with the arguments and variables of this context" |
|
331 |
||
332 |
|n| |
|
333 |
||
1810 | 334 |
n := self numArgs + self numVars. |
3130 | 335 |
n == 0 ifTrue:[ |
17757 | 336 |
"/ little optimization here - avoid creating empty containers |
337 |
^ #() |
|
3130 | 338 |
]. |
623 | 339 |
^ (Array new:n) replaceFrom:1 to:n with:self. |
1810 | 340 |
|
341 |
"Modified: 23.10.1996 / 16:19:41 / cg" |
|
623 | 342 |
! |
154 | 343 |
|
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argumentCount |
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345 |
"ANSI alias for numArgs: return the number of arguments to the Block/Method" |
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|
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347 |
%{ /* NOCONTEXT */ |
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348 |
|
8913 | 349 |
RETURN ( __mkSmallInteger( (__intVal(__INST(flags)) >> __NARG_SHIFT) & __NARG_MASK) ); |
8687
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350 |
%} |
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351 |
! |
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352 |
|
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353 |
at:n put:value |
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354 |
super at:n put:value. |
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355 |
|
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|
356 |
"/ need some aid for optimized code - |
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|
357 |
"/ some machines have the arguments/receiver etc. kept in register vars ... |
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|
358 |
"/ the unfix updates the machine-stack version of the receiver. |
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|
359 |
%{ |
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|
360 |
__UNFIXCONTEXT(self, 0); |
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|
361 |
%}. |
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|
362 |
^ value |
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|
363 |
! |
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|
364 |
|
623 | 365 |
home |
366 |
"return the immediate home of the receiver. |
|
367 |
for block contexts, this is the methodcontext, where the block was created, |
|
368 |
for nested block contexts, its the surrounding blocks context. |
|
369 |
for method-contexts this is nil." |
|
25 | 370 |
|
623 | 371 |
^ nil "home" |
372 |
! |
|
1 | 373 |
|
3324
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
374 |
homeReceiver |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
375 |
"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
|
376 |
|
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
377 |
^ receiver |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
378 |
|
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
379 |
"Created: / 5.3.1998 / 16:18:26 / stefan" |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
380 |
! |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
381 |
|
1 | 382 |
instVarAt:index |
69 | 383 |
"have to catch instVar access to retVal and handle - they are invalid. |
17757 | 384 |
Notice, that one of the next ST/X versions might get some syntactic |
69 | 385 |
extension to get this automatically)." |
1 | 386 |
|
17757 | 387 |
(index == %{ __MKSMALLINT(__SLOT_CONTEXT_SENDER) %} ) ifTrue:[^ self sender]."/ sender - must be accessed specially |
388 |
(index == %{ __MKSMALLINT(__SLOT_CONTEXT_RETVAL) %} ) ifTrue:[^ nil]. "/ retvalTemp - invisible |
|
389 |
(index == %{ __MKSMALLINT(__SLOT_CONTEXT_HANDLE) %} ) ifTrue:[^ nil]. "/ handle to machine stack - invisible |
|
1 | 390 |
^ super instVarAt:index |
391 |
! |
|
392 |
||
393 |
instVarAt:index put:value |
|
69 | 394 |
"have to catch instVar access to retVal and handle - they are invalid. |
17757 | 395 |
Notice, that one of the next ST/X versions might get some syntactic |
69 | 396 |
extension to get this automatically)." |
1 | 397 |
|
17757 | 398 |
(index == %{ __MKSMALLINT(__SLOT_CONTEXT_SENDER) %} ) ifTrue:[^ nil]. "/ sender - not allowed to change |
399 |
(index == %{ __MKSMALLINT(__SLOT_CONTEXT_RETVAL) %} ) ifTrue:[^ nil]. "/ retvalTemp - not allowed to change |
|
400 |
(index == %{ __MKSMALLINT(__SLOT_CONTEXT_HANDLE) %} ) ifTrue:[^ nil]. "/ handle to machine stack - not allowed to change |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
401 |
super instVarAt:index put:value. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
402 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
403 |
"/ need some aid for optimized code - |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
404 |
"/ 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
|
405 |
"/ 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
|
406 |
%{ |
4570 | 407 |
__UNFIXCONTEXT(self, 0); |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
408 |
%}. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
409 |
^ value |
1 | 410 |
! |
411 |
||
4328
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
412 |
javaLineNumber |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
413 |
|nr pc| |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
414 |
|
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
415 |
lineNr notNil ifTrue:[ |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
416 |
pc := lineNr bitAnd:16rFFFF. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
417 |
]. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
418 |
|
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
419 |
"/ '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
|
420 |
pc isNil ifTrue:[ |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
421 |
nr := self lineNumberFromMethod. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
422 |
nr notNil ifTrue:[ |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
423 |
^ nr |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
424 |
]. |
17757 | 425 |
" '-> 0 [a]' printCR. " |
4328
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
426 |
^0 |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
427 |
]. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
428 |
|
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
429 |
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
|
430 |
nr isNil ifTrue:[ |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
431 |
nr := self lineNumberFromMethod. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
432 |
nr notNil ifTrue:[ |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
433 |
^ nr |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
434 |
]. |
17757 | 435 |
" '-> 0 [b]' printCR. " |
4328
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
436 |
^ 0 |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
437 |
]. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
438 |
"/ '-> ' print. nr printCR. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
439 |
^ nr. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
440 |
|
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
441 |
! |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
442 |
|
623 | 443 |
lineNumber |
444 |
"this returns the lineNumber within the methods source, where the context was |
|
445 |
interrupted or called another method. (currently, sometimes this information |
|
446 |
is not available - in this case 0 is returned)" |
|
1 | 447 |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
448 |
|l| |
3923 | 449 |
|
4328
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
450 |
receiver isJavaObject ifTrue:[ |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
451 |
"/ 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
|
452 |
self method isJavaMethod ifTrue:[ |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
453 |
^ self javaLineNumber |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
454 |
] |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
455 |
]. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
456 |
|
3923 | 457 |
lineNr notNil ifTrue:[ |
458 |
l := lineNr bitAnd:16rFFFF. |
|
459 |
]. |
|
460 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
461 |
"/ self isJavaContext ifTrue:[ |nr m| |
3923 | 462 |
"/ m := self method. |
463 |
"/ l isNil ifTrue:[ |
|
464 |
"/ m notNil ifTrue:[ |
|
465 |
"/ nr := m lineNumber |
|
466 |
"/ ]. |
|
467 |
"/ nr notNil ifTrue:[ |
|
468 |
"/ ^ nr |
|
469 |
"/ ]. |
|
470 |
"/ ^0 |
|
471 |
"/ ]. |
|
472 |
"/ nr := self method lineNumberForPC:l. |
|
473 |
"/ nr isNil ifTrue:[ |
|
474 |
"/ m notNil ifTrue:[ |
|
475 |
"/ nr := m lineNumber |
|
476 |
"/ ]. |
|
477 |
"/ nr notNil ifTrue:[ |
|
478 |
"/ ^ nr |
|
479 |
"/ ]. |
|
480 |
"/ ^ 0 |
|
481 |
"/ ]. |
|
482 |
"/ ^ nr. |
|
483 |
"/ ]. |
|
484 |
||
485 |
^ l |
|
486 |
||
487 |
"Modified: / 10.11.1998 / 13:19:48 / cg" |
|
1 | 488 |
! |
489 |
||
4450 | 490 |
lineNumberFromMethod |
491 |
^ 1 |
|
492 |
! |
|
493 |
||
8488 | 494 |
message |
495 |
^ Message selector:selector arguments:self args |
|
496 |
||
497 |
" |
|
9355 | 498 |
thisContext methodHome message |
499 |
thisContext message |
|
8488 | 500 |
" |
501 |
! |
|
502 |
||
1 | 503 |
method |
54 | 504 |
"return the method for which the receiver was created. |
17797 | 505 |
Change with ST/X vsn 6: |
506 |
In older versions, the method was not stored in the context, but a lookup |
|
507 |
was simulated using selector and class. |
|
508 |
(which occasionally returned the wrong method - especially in the debugger, |
|
509 |
when the debugged method was changed). |
|
510 |
This has been changed - especially to support Jan's meta-object protocol. |
|
511 |
It is now stored in the context" |
|
1 | 512 |
|
3508 | 513 |
|c sender sendersSelector m| |
1 | 514 |
|
17757 | 515 |
method notNil ifTrue:[ |
516 |
method isMethod ifTrue:[ |
|
517 |
^ method |
|
518 |
] |
|
519 |
]. |
|
520 |
||
325 | 521 |
c := self searchClass. |
522 |
" |
|
523 |
the below cannot happen in normal circumstances |
|
524 |
(added to avoid recursive errors in case of a broken sender chain) |
|
525 |
" |
|
526 |
c isBehavior ifFalse:[ |
|
17757 | 527 |
'Context [error]: non class in searchClass' errorPrintCR. |
528 |
' selector: ' errorPrint. selector errorPrint. |
|
529 |
' receiver: ' errorPrint. receiver errorPrintCR. |
|
530 |
^ nil |
|
325 | 531 |
]. |
532 |
||
328 | 533 |
c := c whichClassIncludesSelector:selector. |
1 | 534 |
c notNil ifTrue:[ |
17757 | 535 |
method := c compiledMethodAt:selector. |
536 |
^ method |
|
1 | 537 |
]. |
216 | 538 |
|
3508 | 539 |
"mhmh - seems to be a context for an unbound method (as generated by doIt); |
216 | 540 |
look in the senders context. Consider this a kludge. |
3143 | 541 |
(maybe it was not too good of an idea to NOT keep the current |
542 |
method in the context ...) |
|
543 |
Future versions of ST/X's message lookup may store the method in |
|
544 |
the context. |
|
216 | 545 |
" |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
546 |
sender := self sender. |
3143 | 547 |
sender notNil ifTrue:[ |
17757 | 548 |
sendersSelector := sender selector. |
549 |
sendersSelector notNil ifTrue:[ |
|
550 |
(sendersSelector startsWith:'valueWithReceiver:') ifTrue:[ |
|
551 |
m := sender receiver. |
|
552 |
m isMethod ifTrue:[ |
|
553 |
method := m. |
|
554 |
^ m |
|
555 |
] |
|
556 |
] |
|
557 |
] |
|
216 | 558 |
]. |
559 |
||
1 | 560 |
^ nil |
2135
6bd144c1c358
newStyle info & error messages
Claus Gittinger <cg@exept.de>
parents:
1853
diff
changeset
|
561 |
|
3143 | 562 |
"Modified: / 4.1.1998 / 21:15:32 / cg" |
1 | 563 |
! |
564 |
||
212 | 565 |
methodClass |
566 |
"return the class in which the method for which the receiver was created is." |
|
567 |
||
1456 | 568 |
|cls m| |
569 |
||
17757 | 570 |
method notNil ifTrue:[ |
571 |
method isMethod ifTrue:[ |
|
572 |
^ method mclass |
|
573 |
] |
|
574 |
]. |
|
575 |
||
1456 | 576 |
cls := self searchClass. |
3923 | 577 |
(cls isMeta |
578 |
and:[cls soleInstance isJavaClass]) ifTrue:[ |
|
579 |
cls := cls soleInstance |
|
580 |
]. |
|
1456 | 581 |
|
3923 | 582 |
[cls notNil] whileTrue:[ |
583 |
cls := cls whichClassIncludesSelector:selector. |
|
584 |
cls isNil ifTrue:[^ nil]. |
|
585 |
||
586 |
m := cls compiledMethodAt:selector. |
|
587 |
m notNil ifTrue:[ |
|
588 |
m isIgnored ifFalse:[^ cls]. |
|
589 |
]. |
|
590 |
cls := cls superclass |
|
1456 | 591 |
]. |
592 |
^ cls |
|
593 |
||
3923 | 594 |
"Modified: / 5.11.1998 / 19:07:43 / cg" |
212 | 595 |
! |
596 |
||
623 | 597 |
methodHome |
598 |
"return the method-home - for method contexts this is the receiver" |
|
599 |
||
600 |
^ self |
|
601 |
! |
|
602 |
||
603 |
ntemp |
|
604 |
"return the number of temporary variables of the Block/Method. |
|
1810 | 605 |
(for debugging only). |
606 |
I dont like the name of this method; its here for compatibility." |
|
623 | 607 |
|
1810 | 608 |
^ self numTemps |
609 |
||
610 |
"Modified: 23.10.1996 / 16:19:06 / cg" |
|
623 | 611 |
! |
612 |
||
613 |
numArgs |
|
614 |
"return the number of arguments to the Block/Method" |
|
615 |
||
616 |
%{ /* NOCONTEXT */ |
|
617 |
||
8913 | 618 |
RETURN ( __mkSmallInteger( (__intVal(__INST(flags)) >> __NARG_SHIFT) & __NARG_MASK) ); |
623 | 619 |
%} |
620 |
! |
|
621 |
||
1810 | 622 |
numTemps |
623 |
"return the number of temporary variables of the Block/Method. |
|
624 |
(for debugging only)" |
|
625 |
||
626 |
^ self size - self numArgs - self numVars |
|
627 |
||
628 |
"Created: 23.10.1996 / 16:19:10 / cg" |
|
629 |
"Modified: 23.10.1996 / 16:19:48 / cg" |
|
630 |
! |
|
631 |
||
632 |
numVars |
|
623 | 633 |
"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
|
634 |
|
623 | 635 |
%{ /* NOCONTEXT */ |
636 |
||
8913 | 637 |
RETURN ( __mkSmallInteger( (__intVal(__INST(flags)) >> __NVAR_SHIFT) & __NVAR_MASK) ); |
623 | 638 |
%} |
639 |
! |
|
640 |
||
1810 | 641 |
nvars |
642 |
"return the number of local variables of the Block/Method. |
|
643 |
I dont like the name of this method; its here for compatibility." |
|
644 |
||
645 |
^ self numVars |
|
646 |
||
647 |
"Modified: 23.10.1996 / 16:18:44 / cg" |
|
648 |
! |
|
649 |
||
623 | 650 |
receiver |
651 |
"return the receiver of the context" |
|
652 |
||
653 |
^ receiver |
|
654 |
! |
|
655 |
||
4543 | 656 |
receiver:aCompiledCode |
657 |
"set the receiver of the message" |
|
658 |
||
4560
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
659 |
receiver := aCompiledCode. |
4543 | 660 |
|
4560
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
661 |
"/ need some aid for optimized code - |
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
662 |
"/ some machines have the arguments kept in register vars ... |
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
663 |
"/ 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
|
664 |
%{ |
4570 | 665 |
__UNFIXCONTEXT(self, 0); |
4560
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
666 |
%}. |
4543 | 667 |
|
668 |
! |
|
669 |
||
17740
55fb39bdf20e
Initial support for method sandboxing.
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
17736
diff
changeset
|
670 |
sandbox |
55fb39bdf20e
Initial support for method sandboxing.
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
17736
diff
changeset
|
671 |
|
55fb39bdf20e
Initial support for method sandboxing.
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
17736
diff
changeset
|
672 |
"Answers my sandbox, defaults to my method's sandbox" |
55fb39bdf20e
Initial support for method sandboxing.
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
17736
diff
changeset
|
673 |
|
55fb39bdf20e
Initial support for method sandboxing.
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
17736
diff
changeset
|
674 |
^self method sandbox |
55fb39bdf20e
Initial support for method sandboxing.
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
17736
diff
changeset
|
675 |
|
55fb39bdf20e
Initial support for method sandboxing.
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
17736
diff
changeset
|
676 |
"Created: / 27-12-2009 / 13:46:55 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
55fb39bdf20e
Initial support for method sandboxing.
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
17736
diff
changeset
|
677 |
! |
55fb39bdf20e
Initial support for method sandboxing.
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
17736
diff
changeset
|
678 |
|
623 | 679 |
searchClass |
680 |
"this is the class where the method-lookup started; |
|
681 |
for normal sends, it is nil (or sometimes the receivers class). |
|
682 |
For supersends, its the superclass of the one, in which the |
|
683 |
caller was defined." |
|
684 |
||
685 |
searchClass notNil ifTrue:[^ searchClass]. |
|
686 |
^ receiver class |
|
687 |
! |
|
688 |
||
689 |
selector |
|
690 |
"return the selector of the method for which the context was created" |
|
691 |
||
692 |
^ selector |
|
536
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
693 |
! |
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
694 |
|
1 | 695 |
sender |
696 |
"return the sender of the context" |
|
697 |
||
536
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
698 |
%{ /* NOCONTEXT */ |
1668
41db5950f9ea
oops - con local variables are now renamed (last change in stc)
Claus Gittinger <cg@exept.de>
parents:
1492
diff
changeset
|
699 |
OBJ theContext; |
536
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
700 |
|
3508 | 701 |
theContext = __INST(sender_); |
949 | 702 |
/* |
703 |
* this special nil test is for the very first context (startup-context); |
|
704 |
* actually, its cosmetics, to avoid a visible nil>>nil context in the debugger. |
|
705 |
*/ |
|
2205 | 706 |
if (__isNonNilObject(theContext)) { |
949 | 707 |
|
17757 | 708 |
if (__isLazy(theContext)) { |
709 |
/* |
|
710 |
* this cannot happen |
|
711 |
*/ |
|
712 |
__PATCHUPCONTEXT(theContext); |
|
713 |
} |
|
714 |
if (! __isNonLIFO(theContext)) { |
|
715 |
/* |
|
716 |
* to be prepared for the worst situation |
|
717 |
* (the sender is not stored, so the trap wont catch it) |
|
718 |
* make the writeBarrier trigger manually. |
|
719 |
* We'll see, if this is really required. |
|
720 |
*/ |
|
721 |
theContext->o_space |= CATCHMARK; |
|
722 |
_markNonLIFO(theContext); |
|
723 |
} |
|
536
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
724 |
} |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
725 |
RETURN (theContext); |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
726 |
%} |
1 | 727 |
! |
728 |
||
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
729 |
senderIsNil |
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
730 |
"return true, if I have no sender" |
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
731 |
|
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
732 |
%{ /* NOCONTEXT */ |
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
733 |
if ( __INST(sender_) == nil ) { |
5422 | 734 |
RETURN (true); |
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
735 |
} |
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
736 |
RETURN (false); |
5422 | 737 |
%}. |
738 |
^ self sender isNil |
|
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
739 |
! |
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
740 |
|
623 | 741 |
setLineNumber:aNumber |
742 |
"private entry for uncompiledCodeObject ..." |
|
1 | 743 |
|
623 | 744 |
lineNr := aNumber |
340 | 745 |
! |
746 |
||
5749 | 747 |
setNumArgs:nA numVars:nV |
748 |
"set the number of arguments and variables" |
|
749 |
||
750 |
%{ /* NOCONTEXT */ |
|
8910 | 751 |
INT flg; |
5749 | 752 |
|
753 |
flg = __intVal(__INST(flags)); |
|
754 |
flg = flg & ~(__NARG_MASK << __NARG_SHIFT); |
|
755 |
flg = flg & ~(__NVAR_MASK << __NVAR_SHIFT); |
|
756 |
flg = flg | __intVal(nA) << __NARG_SHIFT; |
|
757 |
flg = flg | __intVal(nV) << __NVAR_SHIFT; |
|
8913 | 758 |
__INST(flags) = __mkSmallInteger(flg); |
5749 | 759 |
%} |
760 |
! |
|
761 |
||
17757 | 762 |
tempAt:index |
8578 | 763 |
"return the n'th stack-temporary variable" |
764 |
||
765 |
^ self at:index |
|
766 |
! |
|
767 |
||
17757 | 768 |
temporaries |
202 | 769 |
"return an array filled with the temporaries of this context" |
770 |
||
308 | 771 |
|nonTemps mySize| |
202 | 772 |
|
1810 | 773 |
nonTemps := self numArgs + self numVars. |
774 |
mySize := self numTemps. |
|
3130 | 775 |
mySize == 0 ifTrue:[ |
17757 | 776 |
"/ little optimization here - avaoid creating empty containers |
777 |
^ #() |
|
3130 | 778 |
]. |
308 | 779 |
^ (Array new:mySize) replaceFrom:1 to:mySize with:self startingAt:nonTemps+1 |
1810 | 780 |
|
781 |
"Modified: 23.10.1996 / 16:20:00 / cg" |
|
202 | 782 |
! |
783 |
||
10 | 784 |
varAt:n |
785 |
"return the n'th local variable" |
|
786 |
||
154 | 787 |
^ self at:(n + self numArgs) |
10 | 788 |
! |
789 |
||
790 |
varAt:n put:value |
|
791 |
"set the n'th local variable - useful when the receiver should be restarted |
|
54 | 792 |
or continued" |
10 | 793 |
|
154 | 794 |
self at:(n + self numArgs) put:value |
10 | 795 |
! |
796 |
||
17757 | 797 |
vars |
623 | 798 |
"return an array filled with the local variables of this context" |
375 | 799 |
|
623 | 800 |
|nonVars mySize| |
360 | 801 |
|
623 | 802 |
nonVars := self numArgs. |
1810 | 803 |
mySize := self numVars. |
3130 | 804 |
mySize == 0 ifTrue:[ |
17757 | 805 |
"/ little optimization here - avaoid creating empty containers |
806 |
^ #() |
|
3130 | 807 |
]. |
623 | 808 |
^ (Array new:mySize) replaceFrom:1 to:mySize with:self startingAt:nonVars+1 |
1810 | 809 |
|
810 |
"Modified: 23.10.1996 / 16:20:06 / cg" |
|
1 | 811 |
! ! |
812 |
||
623 | 813 |
!Context methodsFor:'copying'! |
415 | 814 |
|
10943 | 815 |
deepCopyUsing:aDictionary postCopySelector:postCopySelector |
623 | 816 |
"raise an error - deepCopy is not allowed for contexts" |
37 | 817 |
|
10136 | 818 |
|copyOfMe| |
3350
40dc4807a6d4
must catch #deppCopyUsing: instead of #deepCopy.
Claus Gittinger <cg@exept.de>
parents:
3324
diff
changeset
|
819 |
|
10136 | 820 |
copyOfMe := self shallowCopy. |
821 |
copyOfMe setSender:nil. |
|
10943 | 822 |
copyOfMe perform:postCopySelector with:self. |
10136 | 823 |
^ copyOfMe |
824 |
||
825 |
"Created: / 31-03-1998 / 15:51:14 / cg" |
|
826 |
"Modified: / 20-10-2006 / 14:54:12 / User" |
|
1 | 827 |
! ! |
828 |
||
77 | 829 |
!Context methodsFor:'error handling'! |
830 |
||
831 |
invalidReturn:returnValue |
|
832 |
"this message is sent by the VM, when a methods context |
|
833 |
which has already returned is about to return again. |
|
834 |
(i.e. about to execute a return from an already returned |
|
105 | 835 |
method in a block). |
141 | 836 |
We raise a signal here, to allow catching of that situation." |
77 | 837 |
|
406 | 838 |
" |
839 |
in previous versions of ST/X and ST-80, this was no error; |
|
840 |
(instead, a normal blockreturn was performed to the value-sender). |
|
841 |
From a note in comp.lang.smalltalk, I conclude that new ST-80 versions |
|
842 |
now raise an error if this happens. |
|
843 |
Comment out the raise below to get that (old) behavior |
|
844 |
BETTER REWRITE YOUR APPLICATION |
|
17757 | 845 |
" |
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
846 |
"/ old behavior: |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
847 |
"/ ^ returnValue |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
848 |
|
282 | 849 |
"/ new behavior: |
850 |
||
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
851 |
"/ 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
|
852 |
"/ use another error message. |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
853 |
|
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
854 |
(home notNil and:[home sender notNil]) ifTrue:[ |
17757 | 855 |
^ CannotReturnError |
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
856 |
raiseRequestWith:returnValue |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
857 |
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
|
858 |
]. |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
859 |
|
17757 | 860 |
^ CannotReturnError |
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
861 |
raiseRequestWith:returnValue. |
282 | 862 |
|
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
863 |
"Modified: / 2.2.1998 / 15:19:52 / cg" |
406 | 864 |
! |
865 |
||
866 |
invalidReturnOrRestart:returnValue |
|
867 |
"this message is sent by the VM, when a methods context |
|
868 |
which was compiled non-returnable is about to return again. |
|
869 |
We raise a signal here, to allow catching of that situation." |
|
870 |
||
6002 | 871 |
^ CannotReturnError |
872 |
raiseRequestWith:returnValue |
|
873 |
errorString:'method was compiled non-resumable' |
|
360 | 874 |
! |
875 |
||
876 |
invalidReturnOrRestartError:how with:value |
|
877 |
"common error reporter for restart/return errors" |
|
17757 | 878 |
|
360 | 879 |
self canReturn ifTrue:[ |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
880 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
881 |
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
|
882 |
(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
|
883 |
" |
17757 | 884 |
^ CannotReturnError |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
885 |
raiseRequestWith:value |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
886 |
errorString:(how , ' context not on calling chain') |
360 | 887 |
]. |
888 |
" |
|
889 |
tried to return from/restart a context of a method which was compiled |
|
890 |
unrestartable or of a block (which is never restartable) |
|
891 |
" |
|
17757 | 892 |
^ CannotReturnError |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
893 |
raiseRequestWith:value |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
894 |
errorString:(how , ' context cannot be restarted/returned from') |
77 | 895 |
! ! |
896 |
||
6404 | 897 |
!Context methodsFor:'fixups'! |
898 |
||
899 |
fixAllLineNumbers |
|
900 |
%{ |
|
901 |
__PATCHUPCONTEXTS(__thisContext); |
|
6424 | 902 |
__CONTEXTLINENOS(self); |
6404 | 903 |
%} |
904 |
! ! |
|
905 |
||
623 | 906 |
!Context methodsFor:'minidebugger printing'! |
907 |
||
908 |
fullPrint |
|
17757 | 909 |
"print the receiver, selector and args of the context |
623 | 910 |
- used only for MiniDebuggers walkback print" |
911 |
||
912 |
self receiverPrintString print. ' ' print. selector print. |
|
913 |
self size ~~ 0 ifTrue: [ |
|
17757 | 914 |
' ' print. self argsDisplayString print |
623 | 915 |
]. |
1426 | 916 |
' [' print. self lineNumber print. ']' printCR |
623 | 917 |
|
918 |
" |
|
919 |
thisContext fullPrint |
|
920 |
" |
|
1426 | 921 |
|
922 |
"Modified: 20.5.1996 / 10:27:14 / cg" |
|
623 | 923 |
! |
924 |
||
925 |
fullPrintAll |
|
926 |
"print a full walkback starting at the receiver |
|
927 |
- used only for MiniDebuggers walkback print" |
|
928 |
||
929 |
|context| |
|
930 |
||
931 |
context := self. |
|
932 |
[context notNil] whileTrue: [ |
|
17757 | 933 |
context fullPrint. |
934 |
context := context sender |
|
623 | 935 |
] |
936 |
||
937 |
" |
|
938 |
thisContext fullPrintAll |
|
939 |
" |
|
2173 | 940 |
! |
941 |
||
4674 | 942 |
fullPrintAllLevels:nOrNil |
943 |
"print a full walkback starting at the receiver, only print n levels |
|
944 |
- used only for MiniDebuggers walkback print" |
|
945 |
||
946 |
|context count| |
|
947 |
||
948 |
count := 0. |
|
949 |
context := self. |
|
950 |
[context notNil] whileTrue: [ |
|
951 |
context fullPrint. |
|
952 |
context := context sender. |
|
5911 | 953 |
nOrNil notNil ifTrue:[ |
4674 | 954 |
(count := count+1) > nOrNil ifTrue:[^self]. |
955 |
] |
|
956 |
] |
|
957 |
||
958 |
" |
|
6648 | 959 |
thisContext fullPrintAllLevels:5 |
4674 | 960 |
" |
961 |
||
962 |
"Created: / 3.9.1999 / 14:02:38 / ps" |
|
11540 | 963 |
! |
964 |
||
11542 | 965 |
printAll |
966 |
"print a full walkback starting at the receiver, only print n levels |
|
967 |
- used only for MiniDebuggers walkback print" |
|
968 |
||
969 |
self printAllLevels:nil |
|
970 |
||
971 |
" |
|
972 |
thisContext printAll |
|
973 |
" |
|
974 |
! |
|
975 |
||
11540 | 976 |
printAllLevels:nOrNil |
977 |
"print a full walkback starting at the receiver, only print n levels |
|
978 |
- used only for MiniDebuggers walkback print" |
|
979 |
||
980 |
|context count| |
|
981 |
||
982 |
count := 0. |
|
983 |
context := self. |
|
11544 | 984 |
'--------------------------' printCR. |
11540 | 985 |
[context notNil] whileTrue: [ |
986 |
context printCR. |
|
987 |
context := context sender. |
|
988 |
nOrNil notNil ifTrue:[ |
|
11543 | 989 |
(count := count+1) > nOrNil ifTrue:[ |
990 |
'--------------------------' printCR. |
|
17757 | 991 |
^ self |
11543 | 992 |
]. |
11540 | 993 |
] |
11545 | 994 |
]. |
995 |
'--------------------------' printCR. |
|
11540 | 996 |
|
997 |
" |
|
998 |
thisContext printAllLevels:5 |
|
999 |
" |
|
623 | 1000 |
! ! |
1001 |
||
1 | 1002 |
!Context methodsFor:'non local control flow'! |
1003 |
||
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1004 |
evaluateUnwindActionsUpTo:aContext |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1005 |
"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
|
1006 |
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
|
1007 |
marked using #markForUnwind. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1008 |
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
|
1009 |
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
|
1010 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1011 |
|con unwindBlock| |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1012 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1013 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1014 |
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
|
1015 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1016 |
con := self findNextUnwindContextOr:aContext. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1017 |
[con notNil and:[con ~~ aContext]] whileTrue:[ |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1018 |
unwindBlock := con receiver unwindHandlerInContext:con. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1019 |
con unmarkForUnwind. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1020 |
unwindBlock value. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1021 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1022 |
con := con findNextUnwindContextOr:aContext. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1023 |
]. |
11340
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1024 |
"/ mhmh - the just unwound context could itself be markedForUnwind |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1025 |
(con notNil and:[con isMarkedForUnwind]) ifTrue:[ |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1026 |
unwindBlock := con receiver unwindHandlerInContext:con. |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1027 |
con unmarkForUnwind. |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1028 |
unwindBlock value. |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1029 |
]. |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1030 |
^ con |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1031 |
! |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1032 |
|
1 | 1033 |
restart |
1034 |
"restart the receiver - i.e. the method is evaluated again. |
|
402 | 1035 |
if the context to restart already died, trigger an error. |
141 | 1036 |
This is a low level helper for unwindAndRestart. |
1037 |
||
17757 | 1038 |
NOTICE: |
1039 |
NO unwind actions are performed - this is usually not |
|
1040 |
what you want (see Context>>unwindAndRestart). |
|
1041 |
||
1042 |
LIMITATION: |
|
1043 |
currently a context can only be restarted by |
|
1044 |
the owning process - not from outside. |
|
1045 |
Also, the compiler has an option (+optcontext) to create |
|
1046 |
non-restartable contexts (which are faster). |
|
1047 |
If such a context is restarted, a runtime error is raised." |
|
1 | 1048 |
|
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1049 |
%{ /* NOCONTEXT */ |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1050 |
if (__INST(sender_) != nil) { |
17757 | 1051 |
__RESUMECONTEXT__(self, RESTART_VALUE, 0); |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1052 |
} |
360 | 1053 |
%}. |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1054 |
self sender isNil ifTrue:[^ nil]. |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1055 |
|
69 | 1056 |
" |
360 | 1057 |
when we arrive here, something went wrong. |
69 | 1058 |
debugging ... |
1059 |
" |
|
360 | 1060 |
^ self invalidReturnOrRestartError:#restart with:nil |
1 | 1061 |
! |
1062 |
||
623 | 1063 |
resume |
1064 |
"resume execution in this context. I.e. as if the method called |
|
1065 |
last by the receiver did a ^ nil. |
|
1066 |
If the context has already returned, report an error. |
|
1067 |
||
1068 |
NOTICE: |
|
17757 | 1069 |
NO unwind actions are performed (see Context>>unwind). |
1070 |
||
1071 |
LIMITATION: |
|
1072 |
currently a context can only be resumed by |
|
1073 |
the owning process - not from outside. |
|
1074 |
Also, the compiler has an option (+optcontext) to create |
|
1075 |
non-resumable contexts (which are faster). |
|
1076 |
If such a context is restarted, a runtime error is raised." |
|
623 | 1077 |
|
1078 |
^ self resume:nil |
|
1079 |
! |
|
1080 |
||
1081 |
resume:value |
|
1082 |
"resume the receiver - as if it got 'value' from whatever |
|
1083 |
it called. This continues execution in the receivers method |
|
1084 |
after the point where it did its last send. |
|
17757 | 1085 |
If the context has already returned - report an error. |
623 | 1086 |
|
1087 |
NOTICE: |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1088 |
NO unwind actions are performed (see Context>>unwind:). |
623 | 1089 |
|
17757 | 1090 |
LIMITATION: |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1091 |
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
|
1092 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1093 |
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
|
1094 |
non-resumable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1095 |
If such a context is restarted, a runtime error is raised." |
623 | 1096 |
|
1668
41db5950f9ea
oops - con local variables are now renamed (last change in stc)
Claus Gittinger <cg@exept.de>
parents:
1492
diff
changeset
|
1097 |
|theContext| |
623 | 1098 |
|
1099 |
" |
|
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
1100 |
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
|
1101 |
(i.e. the one that I have called) and return from it. |
623 | 1102 |
" |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1103 |
|
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
1104 |
%{ |
4557 | 1105 |
OBJ sndr; |
1106 |
||
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
1107 |
theContext = __thisContext; |
4557 | 1108 |
while (theContext != nil) { |
1109 |
sndr = __ContextInstPtr(theContext)->c_sender; |
|
1110 |
if (sndr == self) break; |
|
1111 |
theContext = sndr; |
|
623 | 1112 |
} |
3508 | 1113 |
if (theContext != nil) { |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1114 |
if (__isLazy(theContext)) { |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1115 |
__PATCHUPCONTEXT(theContext); |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1116 |
} |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1117 |
} |
623 | 1118 |
%}. |
1119 |
||
1668
41db5950f9ea
oops - con local variables are now renamed (last change in stc)
Claus Gittinger <cg@exept.de>
parents:
1492
diff
changeset
|
1120 |
theContext isNil ifTrue:[ |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1121 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1122 |
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
|
1123 |
(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
|
1124 |
" |
4557 | 1125 |
^ thisContext invalidReturnOrRestartError:#'resume:' with:value |
623 | 1126 |
]. |
1668
41db5950f9ea
oops - con local variables are now renamed (last change in stc)
Claus Gittinger <cg@exept.de>
parents:
1492
diff
changeset
|
1127 |
^ theContext return:value |
623 | 1128 |
! |
1129 |
||
4557 | 1130 |
resumeIgnoringErrors:value |
1131 |
"resume the receiver - as if it got 'value' from whatever |
|
1132 |
it called. This continues execution in the receivers method |
|
1133 |
after the point where it did its last send. |
|
17757 | 1134 |
If the context has already returned - simply return. |
4557 | 1135 |
|
1136 |
NOTICE: |
|
1137 |
NO unwind actions are performed (see Context>>unwind:). |
|
1138 |
||
17757 | 1139 |
LIMITATION: |
4557 | 1140 |
currently a context can only be resumed by |
1141 |
the owning process - not from outside. |
|
1142 |
Also, the compiler has an option (+optcontext) to create |
|
1143 |
non-resumable contexts (which are faster). |
|
1144 |
If such a context is restarted, a runtime error is raised." |
|
1145 |
||
1146 |
" |
|
1147 |
starting with this context, find the one below |
|
1148 |
(i.e. the one that I have called) and return from it. |
|
1149 |
" |
|
1150 |
||
1151 |
%{ |
|
1152 |
OBJ theContext, sndr; |
|
1153 |
||
1154 |
theContext = __thisContext; |
|
1155 |
while (theContext != nil) { |
|
1156 |
sndr = __ContextInstPtr(theContext)->c_sender; |
|
1157 |
if (sndr == self) break; |
|
1158 |
theContext = sndr; |
|
1159 |
} |
|
1160 |
if (theContext != nil) { |
|
1161 |
if (__ContextInstPtr(theContext)->c_sender) { |
|
4635 | 1162 |
if (!((INT)(__ContextInstPtr(theContext)->c_flags) & __MASKSMALLINT(__CANNOT_RETURN))) { |
1163 |
__RESUMECONTEXT__(theContext, value, 0); |
|
1164 |
} |
|
4557 | 1165 |
} |
1166 |
} |
|
1167 |
%}. |
|
1168 |
||
1169 |
"/ no error reporting |
|
1170 |
! |
|
1171 |
||
1172 |
resumeOnErrorProceed:value |
|
1173 |
"resume the receiver - as if it got 'value' from whatever |
|
1174 |
it called. This continues execution in the receivers method |
|
1175 |
after the point where it did its last send. |
|
17757 | 1176 |
If the context has already returned - simply return. |
4557 | 1177 |
|
1178 |
NOTICE: |
|
1179 |
NO unwind actions are performed (see Context>>unwind:). |
|
1180 |
||
17757 | 1181 |
LIMITATION: |
4557 | 1182 |
currently a context can only be resumed by |
1183 |
the owning process - not from outside. |
|
1184 |
Also, the compiler has an option (+optcontext) to create |
|
1185 |
non-resumable contexts (which are faster). |
|
1186 |
If such a context is restarted, a runtime error is raised." |
|
1187 |
||
1188 |
" |
|
1189 |
starting with this context, find the one below |
|
1190 |
(i.e. the one that I have called) and return from it. |
|
1191 |
" |
|
1192 |
||
1193 |
%{ |
|
1194 |
OBJ theContext, sndr; |
|
1195 |
||
1196 |
theContext = __thisContext; |
|
1197 |
while (theContext != nil) { |
|
1198 |
sndr = __ContextInstPtr(theContext)->c_sender; |
|
1199 |
if (sndr == self) break; |
|
1200 |
theContext = sndr; |
|
1201 |
} |
|
1202 |
if (theContext != nil) { |
|
1203 |
if (__ContextInstPtr(theContext)->c_sender) { |
|
1204 |
__RESUMECONTEXT__(theContext, value, 0); |
|
1205 |
} |
|
1206 |
} |
|
1207 |
%}. |
|
1208 |
||
1209 |
"/ no error reporting |
|
1210 |
! |
|
1211 |
||
69 | 1212 |
return |
141 | 1213 |
"return from this context with nil. I.e. as if it did a ^ nil. |
1214 |
NOTICE: |
|
17757 | 1215 |
NO unwind actions are performed - this is usually not |
1216 |
what you want (See Context>>unwind). |
|
1217 |
This is a low level method - a helper for unwind. |
|
1218 |
||
1219 |
LIMITATION: |
|
1220 |
currently a context can only be returned by |
|
1221 |
the owning process - not from outside. |
|
1222 |
Also, the compiler has an option (+optcontext) to create |
|
1223 |
non-returnable contexts (which are faster). |
|
1224 |
If such a context is restarted, a runtime error is raised." |
|
141 | 1225 |
|
1226 |
^ self return:nil |
|
1 | 1227 |
! |
1228 |
||
69 | 1229 |
return:value |
1230 |
"return from this context as if it did a '^ value'. |
|
141 | 1231 |
NOTICE: |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1232 |
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
|
1233 |
what you want (See Context>>unwind:). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1234 |
This is a low level method - a helper for unwind. |
141 | 1235 |
|
17757 | 1236 |
LIMITATION: |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1237 |
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
|
1238 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1239 |
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
|
1240 |
non-returnable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1241 |
If such a context is restarted, a runtime error is raised." |
1 | 1242 |
|
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1243 |
%{ /* NOCONTEXT */ |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1244 |
if (__INST(sender_) != nil) { |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1245 |
__RESUMECONTEXT__(self, value, 0); |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1246 |
} |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1247 |
%}. |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1248 |
self sender isNil ifTrue:[^ nil]. |
1 | 1249 |
|
69 | 1250 |
" |
360 | 1251 |
when we arrive here, something went wrong. |
69 | 1252 |
debugging ... |
1253 |
" |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1254 |
^ self invalidReturnOrRestartError:#'return' with:value |
1 | 1255 |
! |
1256 |
||
328 | 1257 |
returnDoing:aBlock |
1258 |
"return from this context as if it did a '^ aBlock value'. |
|
1259 |
The block is evaluated as if called by the receiver context; |
|
1260 |
NOT the true executing context. |
|
1261 |
NOTICE: |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1262 |
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
|
1263 |
what you want (See Context>>unwindThenDo:). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1264 |
This is a low level method - a helper for unwind. |
328 | 1265 |
|
1266 |
LIMITATION: |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1267 |
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
|
1268 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1269 |
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
|
1270 |
non-returnable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1271 |
If such a context is restarted, a runtime error is raised." |
328 | 1272 |
|
17757 | 1273 |
%{ |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1274 |
if (__INST(sender_) != nil) { |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1275 |
__RESUMECONTEXT__(self, aBlock, 2); |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1276 |
} |
360 | 1277 |
%}. |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1278 |
self sender isNil ifTrue:[^ nil]. |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1279 |
|
328 | 1280 |
" |
360 | 1281 |
when we arrive here, something went wrong. |
328 | 1282 |
debugging ... |
1283 |
" |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1284 |
^ self invalidReturnOrRestartError:#'returnDoing' with:aBlock |
328 | 1285 |
! |
1286 |
||
1 | 1287 |
unwind |
69 | 1288 |
"return nil from the receiver - i.e. simulate a '^ nil'. |
11337 | 1289 |
If the context has already returned, report an error. |
1 | 1290 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
69 | 1291 |
and Block>>valueOnUnwindDo: on the way. |
1 | 1292 |
|
17757 | 1293 |
LIMITATION: |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1294 |
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
|
1295 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1296 |
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
|
1297 |
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
|
1298 |
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
|
1299 |
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
|
1300 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1301 |
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
|
1302 |
non-returnable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1303 |
If such a context is restarted, a runtime error is raised." |
141 | 1304 |
|
1305 |
^ self unwind:nil |
|
1 | 1306 |
! |
1307 |
||
1308 |
unwind:value |
|
69 | 1309 |
"return value from the receiver - i.e. simulate a '^ value'. |
360 | 1310 |
If the context has already returned , report an error. |
1 | 1311 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
69 | 1312 |
and Block>>valueOnUnwindDo: on the way. |
141 | 1313 |
|
17757 | 1314 |
LIMITATION: |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1315 |
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
|
1316 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1317 |
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
|
1318 |
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
|
1319 |
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
|
1320 |
context, by giving it an interrupt action - this does make sense. |
1 | 1321 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1322 |
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
|
1323 |
non-returnable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1324 |
If such a context is restarted, a runtime error is raised." |
1 | 1325 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1326 |
|con| |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1327 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1328 |
self senderIsNil ifFalse:[ |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1329 |
con := thisContext evaluateUnwindActionsUpTo:self. |
141 | 1330 |
]. |
1 | 1331 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1332 |
"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
|
1333 |
(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
|
1334 |
should we check for this situation first and NOT evaluate |
141 | 1335 |
the unwind actions in this case ?) |
1336 |
" |
|
69 | 1337 |
con isNil ifTrue:[ |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1338 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1339 |
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
|
1340 |
(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
|
1341 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1342 |
^ self invalidReturnOrRestartError:#'unwind:' with:value |
69 | 1343 |
]. |
141 | 1344 |
" |
1345 |
now, that all unwind-actions are done, I can use the |
|
1346 |
low-level return ... |
|
1347 |
" |
|
1348 |
^ self return:value |
|
1349 |
! |
|
1350 |
||
1351 |
unwindAndRestart |
|
1352 |
"restart the receiver - i.e. the method is evaluated again. |
|
402 | 1353 |
if the context to restart already died report an error. |
141 | 1354 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
1355 |
and Block>>valueOnUnwindDo: before restarting. |
|
1356 |
||
17757 | 1357 |
LIMITATION: |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1358 |
a context can only be restarted by |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1359 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1360 |
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
|
1361 |
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
|
1362 |
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
|
1363 |
context, by giving it an interrupt action - this does make sense. |
141 | 1364 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1365 |
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
|
1366 |
non-restartable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1367 |
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
|
1368 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1369 |
|con| |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1370 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1371 |
self senderIsNil ifFalse:[ |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1372 |
con := thisContext evaluateUnwindActionsUpTo:self. |
141 | 1373 |
]. |
1374 |
||
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1375 |
"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
|
1376 |
(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
|
1377 |
should we check for this situation first and NOT evaluate |
141 | 1378 |
the unwind actions in this case ?) |
1379 |
" |
|
1380 |
con isNil ifTrue:[ |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1381 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1382 |
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
|
1383 |
(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
|
1384 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1385 |
^ self invalidReturnOrRestartError:#'unwindAndRestart:' with:nil |
141 | 1386 |
]. |
1387 |
" |
|
1388 |
now, that all unwind-actions are done, I can use the |
|
1389 |
low-level restart ... |
|
1390 |
" |
|
1391 |
^ self restart |
|
328 | 1392 |
! |
1393 |
||
4485 | 1394 |
unwindAndResume:value |
1395 |
"resume execution in the the receiver - i.e. simulate a '^ value' |
|
1396 |
from whatever it called last. |
|
1397 |
If the context has already returned , report an error. |
|
1398 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
|
1399 |
and Block>>valueOnUnwindDo: on the way. |
|
1400 |
||
17757 | 1401 |
LIMITATION: |
4485 | 1402 |
currently a context can only be unwound by |
1403 |
the owning process - not from outside. |
|
1404 |
i.e. it is not possible for one thread to unwind |
|
1405 |
another threads context - which does not make sense anyway. |
|
1406 |
However, you can force another thread to do this in its own process |
|
1407 |
context, by giving it an interrupt action - this does make sense. |
|
1408 |
||
1409 |
Also, the compiler has an option (+optcontext) to create |
|
1410 |
non-returnable contexts (which are faster). |
|
1411 |
If such a context is restarted, a runtime error is raised." |
|
1412 |
||
1413 |
|con| |
|
1414 |
||
1415 |
self senderIsNil ifFalse:[ |
|
1416 |
con := thisContext evaluateUnwindActionsUpTo:self. |
|
1417 |
]. |
|
1418 |
||
1419 |
"oops, if nil, I am not on the calling chain; |
|
1420 |
(bad bad, unwind action have already been performed. |
|
1421 |
should we check for this situation first and NOT evaluate |
|
1422 |
the unwind actions in this case ?) |
|
1423 |
" |
|
1424 |
con isNil ifTrue:[ |
|
1425 |
" |
|
1426 |
tried to return to a context which is already dead |
|
1427 |
(i.e. the method/block has already executed a return) |
|
1428 |
" |
|
1429 |
^ self invalidReturnOrRestartError:#'unwindAndResume:' with:value |
|
1430 |
]. |
|
1431 |
" |
|
1432 |
now, that all unwind-actions are done, I can use the |
|
1433 |
low-level resume ... |
|
1434 |
" |
|
1435 |
^ self resume:value |
|
1436 |
! |
|
1437 |
||
17757 | 1438 |
unwindThenDo:aBlock |
328 | 1439 |
"return the value of aBlock from the receiver - i.e. simulate a '^ aBlock value'. |
360 | 1440 |
If the context has already returned , report an error. |
328 | 1441 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
1442 |
and Block>>valueOnUnwindDo: on the way. |
|
1443 |
The block is evaluated AFTER all unwind actions are performed |
|
1444 |
(i.e. the blocks sender will be the receiving context, not the |
|
402 | 1445 |
currently executing context) |
328 | 1446 |
|
17757 | 1447 |
LIMITATION: |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1448 |
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
|
1449 |
the owning process - not from outside |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1450 |
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
|
1451 |
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
|
1452 |
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
|
1453 |
context, by giving it an interrupt action - this does make sense. |
328 | 1454 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1455 |
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
|
1456 |
non-returnable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1457 |
If such a context is restarted, a runtime error is raised." |
328 | 1458 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1459 |
|con| |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1460 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1461 |
self senderIsNil ifFalse:[ |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1462 |
con := thisContext evaluateUnwindActionsUpTo:self. |
328 | 1463 |
]. |
1464 |
||
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1465 |
"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
|
1466 |
(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
|
1467 |
should we check for this situation first and NOT evaluate |
328 | 1468 |
the unwind actions in this case ?) |
1469 |
" |
|
1470 |
con isNil ifTrue:[ |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1471 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1472 |
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
|
1473 |
(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
|
1474 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1475 |
^ self invalidReturnOrRestartError:#'unwindThenDo:' with:aBlock |
328 | 1476 |
]. |
1477 |
" |
|
1478 |
now, that all unwind-actions are done, I can use the |
|
1479 |
low-level return ... |
|
1480 |
" |
|
17757 | 1481 |
^ self returnDoing:aBlock |
1 | 1482 |
! ! |
623 | 1483 |
|
1484 |
!Context methodsFor:'printing & storing'! |
|
1485 |
||
1070
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1486 |
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
|
1487 |
|
11539 | 1488 |
|name s| |
1070
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1489 |
%{ |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1490 |
/* |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1491 |
* 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
|
1492 |
* 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
|
1493 |
* which may lead to sends to free objects. In normal operation, this 'cannot' happen. |
17757 | 1494 |
*/ |
1070
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1495 |
if (__isNonNilObject(someObject) && (__qClass(someObject)==nil)) { |
11539 | 1496 |
name = __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
|
1497 |
} |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1498 |
%}. |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1499 |
name notNil ifTrue:[^ name]. |
11539 | 1500 |
s := someObject displayString. |
1501 |
s isNil ifTrue:[ |
|
17757 | 1502 |
^ '**************** nil displayString of ',(someObject class name ? '??') |
11539 | 1503 |
]. |
1504 |
^ s |
|
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 |
|
623 | 1507 |
argsDisplayString |
1508 |
|fullString n "{ Class: SmallInteger }" | |
|
1509 |
||
1510 |
fullString := ''. |
|
1511 |
n := self numArgs. |
|
1512 |
1 to:n do:[:index | |
|
17757 | 1513 |
fullString := fullString , ' ' , (self argStringFor:(self at:index)) |
623 | 1514 |
]. |
1515 |
^ fullString |
|
1516 |
! |
|
1517 |
||
6648 | 1518 |
displayArgsOn:aStream |
1519 |
| n "{ Class: SmallInteger }" | |
|
1520 |
||
1521 |
n := self numArgs. |
|
1522 |
1 to:n do:[:index | |
|
1523 |
aStream nextPutAll:(self argStringFor:(self at:index)). |
|
8578 | 1524 |
aStream nextPutAll:' '. |
6648 | 1525 |
]. |
1526 |
! |
|
1527 |
||
623 | 1528 |
displayString |
17757 | 1529 |
"return a string describing the context - for display in Inspector" |
623 | 1530 |
|
1531 |
^ self class name , '(' , self printString , ')' |
|
1532 |
! |
|
1533 |
||
6648 | 1534 |
fullPrintAllOn:aStream |
17756 | 1535 |
"print a full walkback (incl arguments) starting at the receiver" |
6648 | 1536 |
|
1537 |
|context| |
|
1538 |
||
1539 |
context := self. |
|
1540 |
[context notNil] whileTrue: [ |
|
1541 |
context fullPrintOn:aStream. |
|
1542 |
aStream cr. |
|
1543 |
context := context sender |
|
1544 |
] |
|
1545 |
||
1546 |
" |
|
1547 |
thisContext fullPrintAllOn:Transcript |
|
1548 |
" |
|
1549 |
||
1550 |
"Created: 15.1.1997 / 18:09:05 / cg" |
|
1551 |
! |
|
1552 |
||
1553 |
fullPrintOn:aStream |
|
17756 | 1554 |
"append a verbose description (incl. arguments) of the receiver onto aStream" |
6648 | 1555 |
|
17757 | 1556 |
self receiverPrintString printOn:aStream. |
1557 |
aStream nextPutAll:' >> '. |
|
11311 | 1558 |
self selector printOn:aStream. "show as string (as symbol looks too ugly in browser ...)" |
1559 |
"/ self selector storeOn:aStream. "show as symbol" |
|
8578 | 1560 |
|
6648 | 1561 |
self size ~~ 0 ifTrue: [ |
17757 | 1562 |
aStream nextPutAll:' '. |
6648 | 1563 |
self displayArgsOn:aStream |
1564 |
]. |
|
17757 | 1565 |
aStream nextPutAll:' {'. |
1566 |
self identityHash printOn:aStream. |
|
1567 |
aStream nextPutAll:'}'. |
|
1568 |
||
1569 |
aStream nextPutAll:' ['. |
|
6648 | 1570 |
self lineNumber printOn:aStream. |
8578 | 1571 |
aStream nextPutAll:']'. |
6648 | 1572 |
|
1573 |
" |
|
1574 |
thisContext fullPrintOn:Transcript |
|
1575 |
" |
|
1576 |
||
1577 |
"Modified: 20.5.1996 / 10:27:14 / cg" |
|
1578 |
"Created: 15.1.1997 / 18:09:06 / cg" |
|
1579 |
! |
|
1580 |
||
623 | 1581 |
fullPrintString |
1582 |
"return a string describing the context - this includes the linenumber, |
|
1583 |
receiver printString and argument printString" |
|
1584 |
||
1585 |
|s| |
|
1586 |
||
1587 |
s := WriteStream on:String new. |
|
6648 | 1588 |
self fullPrintOn:s. |
623 | 1589 |
^ s contents |
1590 |
||
1591 |
" |
|
1592 |
thisContext fullPrintString |
|
1593 |
" |
|
1594 |
! |
|
1595 |
||
1596 |
methodPrintString |
|
17757 | 1597 |
"return a string describing the contexts method as 'implementorClass>>selector'" |
623 | 1598 |
|
1853
09cd1e8df9a2
use new Method>>who interface
Claus Gittinger <cg@exept.de>
parents:
1810
diff
changeset
|
1599 |
|mthd who| |
623 | 1600 |
|
1601 |
mthd := self method. |
|
1602 |
mthd notNil ifTrue:[ |
|
11306
c0c5c6a7054a
Print methods: Show message sends as Class >> #selector (with the #),
Stefan Vogel <sv@exept.de>
parents:
10943
diff
changeset
|
1603 |
who := mthd who. |
c0c5c6a7054a
Print methods: Show message sends as Class >> #selector (with the #),
Stefan Vogel <sv@exept.de>
parents:
10943
diff
changeset
|
1604 |
who notNil ifTrue:[ |
c0c5c6a7054a
Print methods: Show message sends as Class >> #selector (with the #),
Stefan Vogel <sv@exept.de>
parents:
10943
diff
changeset
|
1605 |
^ who methodClass name , ' >> #' , who methodSelector |
c0c5c6a7054a
Print methods: Show message sends as Class >> #selector (with the #),
Stefan Vogel <sv@exept.de>
parents:
10943
diff
changeset
|
1606 |
] |
623 | 1607 |
]. |
1608 |
^ mthd displayString. |
|
1609 |
||
1610 |
" |
|
17757 | 1611 |
thisContext methodPrintString |
1612 |
thisContext sender methodPrintString |
|
623 | 1613 |
" |
1853
09cd1e8df9a2
use new Method>>who interface
Claus Gittinger <cg@exept.de>
parents:
1810
diff
changeset
|
1614 |
|
09cd1e8df9a2
use new Method>>who interface
Claus Gittinger <cg@exept.de>
parents:
1810
diff
changeset
|
1615 |
"Modified: 1.11.1996 / 16:21:49 / cg" |
623 | 1616 |
! |
1617 |
||
17756 | 1618 |
printAllOn:aStream |
1619 |
"print a brief walkback (excl. arguments) starting at the receiver" |
|
1620 |
||
1621 |
|context| |
|
1622 |
||
1623 |
context := self. |
|
1624 |
[context notNil] whileTrue: [ |
|
1625 |
context printOn:aStream. |
|
1626 |
aStream cr. |
|
1627 |
context := context sender |
|
1628 |
] |
|
1629 |
||
1630 |
" |
|
1631 |
thisContext printAllOn:Transcript |
|
1632 |
" |
|
1633 |
||
1634 |
"Created: 15.1.1997 / 18:09:05 / cg" |
|
1635 |
! |
|
1636 |
||
623 | 1637 |
printOn:aStream |
17756 | 1638 |
"append a brief description (excl. arguments) of the receiver onto aStream" |
623 | 1639 |
|
1640 |
aStream nextPutAll:(self receiverPrintString). |
|
10549 | 1641 |
"/ aStream nextPutAll:' '. |
1642 |
aStream nextPutAll:' >> '. |
|
1643 |
||
1644 |
aStream bold. |
|
11310
830490e3ac43
dont use storeString of selector in #printOn:
Claus Gittinger <cg@exept.de>
parents:
11306
diff
changeset
|
1645 |
self selector printOn:aStream. "show as string (as symbol looks too ugly in browser ...)" |
830490e3ac43
dont use storeString of selector in #printOn:
Claus Gittinger <cg@exept.de>
parents:
11306
diff
changeset
|
1646 |
"/ self selector storeOn:aStream. "show as symbol" |
10549 | 1647 |
aStream normal. |
4393 | 1648 |
aStream space. |
1649 |
aStream nextPutAll:' ['; nextPutAll:self lineNumber printString; nextPutAll:']' . |
|
1650 |
||
10549 | 1651 |
"Modified: / 21-05-2007 / 13:29:21 / cg" |
623 | 1652 |
! |
1653 |
||
1654 |
receiverPrintString |
|
17757 | 1655 |
"return a string describing the receiver of the context" |
623 | 1656 |
|
1657 |
|receiverClass receiverClassName newString implementorClass| |
|
1658 |
||
10549 | 1659 |
receiverClassName := self saveReceiverClassName. |
1070
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1660 |
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
|
1661 |
|
623 | 1662 |
receiverClass := receiver class. |
3923 | 1663 |
receiverClass isJavaClass ifTrue:[ |
1664 |
receiverClassName := receiverClass displayString |
|
1665 |
] ifFalse:[ |
|
1666 |
(receiverClass isBehavior |
|
17757 | 1667 |
and:[receiverClass isMeta |
3923 | 1668 |
and:[receiverClass soleInstance isJavaClass]]) ifTrue:[ |
1669 |
"/ receiverClassName := receiverClass soleInstance fullName. |
|
1670 |
receiverClassName := receiverClass name. |
|
1671 |
] ifFalse:[ |
|
1672 |
receiverClassName := receiverClass name. |
|
11311 | 1673 |
]. |
1674 |
[ |
|
1675 |
receiverClassName := receiverClass name. |
|
1676 |
]. []. |
|
3923 | 1677 |
]. |
6197 | 1678 |
(receiverClass == SmallInteger |
1679 |
or:[receiverClass == Float]) ifTrue:[ |
|
3923 | 1680 |
newString := '(' , receiver printString , ') ' , receiverClassName |
623 | 1681 |
] ifFalse:[ |
3923 | 1682 |
newString := receiverClassName |
623 | 1683 |
]. |
1684 |
||
1685 |
selector notNil ifTrue:[ |
|
1686 |
"/ implementorClass := self searchClass whichClassIncludesSelector:selector. |
|
1687 |
||
3923 | 1688 |
" |
1689 |
kludge to avoid slow search for containing class |
|
1690 |
" |
|
1691 |
(selector ~~ #doIt and:[selector ~~ #doIt:]) ifTrue:[ |
|
17757 | 1692 |
implementorClass := self methodClass. |
3923 | 1693 |
]. |
1694 |
||
1695 |
implementorClass notNil ifTrue: [ |
|
1696 |
(implementorClass ~~ receiverClass) ifTrue: [ |
|
10549 | 1697 |
"/ newString := newString , '>>>', implementorClass name printString |
1698 |
newString := newString,'(',implementorClass name printString,')' |
|
3923 | 1699 |
] |
1700 |
] ifFalse:[ |
|
1701 |
self searchClass ~~ receiverClass ifTrue:[ |
|
10549 | 1702 |
"/ newString := newString , '>>>' , self searchClass name |
1703 |
newString := newString,'(',self searchClass name,')' |
|
3923 | 1704 |
]. |
1705 |
" |
|
1706 |
kludge for doIt - these unbound methods are not |
|
1707 |
found in the classes methodDictionary |
|
1708 |
" |
|
1709 |
(selector ~~ #doIt and:[selector ~~ #doIt:]) ifTrue:[ |
|
10549 | 1710 |
"/ newString := newString , '>>>**NONE**' |
1711 |
newString := newString , '(**NONE**)' |
|
3923 | 1712 |
] |
1713 |
] |
|
623 | 1714 |
]. |
1715 |
||
1716 |
^ newString |
|
6197 | 1717 |
|
10549 | 1718 |
"Modified: / 21-05-2007 / 13:21:24 / cg" |
1719 |
! |
|
1720 |
||
1721 |
saveReceiverClassName |
|
1722 |
"return the receivers class-name string or nil, if the receiver is invalid. |
|
1723 |
This cares for invalid (free) objects which may appear with bad primitive code, |
|
1724 |
and prevents a crash in such a case." |
|
1725 |
||
1726 |
|receiverClassName| |
|
1727 |
||
1728 |
%{ |
|
1729 |
/* |
|
1730 |
* special handling for (invalid) free objects. |
|
1731 |
* these only appear if some primitiveCode does not correctly use SEND macros, |
|
1732 |
* which may lead to sends to free objects. In normal operation, this 'cannot' happen. |
|
17757 | 1733 |
*/ |
10549 | 1734 |
if (__isNonNilObject(__INST(receiver)) && (__qClass(__INST(receiver))==nil)) { |
1735 |
receiverClassName = __MKSTRING("FreeObject"); |
|
1736 |
} |
|
1737 |
%}. |
|
1738 |
^ receiverClassName |
|
1739 |
||
1740 |
"Created: / 21-05-2007 / 13:19:37 / cg" |
|
623 | 1741 |
! ! |
1742 |
||
7257 | 1743 |
!Context methodsFor:'private-accessing'! |
623 | 1744 |
|
11340
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1745 |
isMarkedForUnwind |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1746 |
"true if the mark for unwind flag is set in the receiver. |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1747 |
The VM needs this to know that some special action is to be performed with |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1748 |
this context - a highly internal mechanism and not for public use." |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1749 |
|
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1750 |
%{ /* NOCONTEXT */ |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1751 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__UNWIND_MARK)) ? true : false ); |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1752 |
%} |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1753 |
" |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1754 |
thisContext isMarkedForUnwind |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1755 |
" |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1756 |
! |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1757 |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1758 |
markForHandle |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1759 |
"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
|
1760 |
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
|
1761 |
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
|
1762 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1763 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1764 |
__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
|
1765 |
%} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1766 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1767 |
"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
|
1768 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1769 |
|
753
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1770 |
markForInterrupt |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1771 |
"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
|
1772 |
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
|
1773 |
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
|
1774 |
|
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1775 |
%{ /* NOCONTEXT */ |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1776 |
__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
|
1777 |
%} |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1778 |
! |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1779 |
|
1727 | 1780 |
markForInterruptOnUnwind |
1781 |
"set the interrupt-on-unwind flag in the receiver. |
|
1782 |
The VM will generate a stepInterrupt, when this context returns or |
|
1783 |
is unwound. This is used by the debugger for faster single-stepping; |
|
1784 |
- a highly internal mechanism and not for public use." |
|
1785 |
||
1786 |
%{ /* NOCONTEXT */ |
|
3508 | 1787 |
__INST(flags) = (OBJ)((INT)__INST(flags) | __MASKSMALLINT(__IRQ_ON_UNWIND)); |
1727 | 1788 |
%} |
1789 |
! |
|
1790 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
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diff
changeset
|
1791 |
markForRaise |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
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diff
changeset
|
1792 |
"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
|
1793 |
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
|
1794 |
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
|
1795 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1796 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1797 |
__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
|
1798 |
%} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1799 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1800 |
"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
|
1801 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1802 |
|
623 | 1803 |
markForUnwind |
749 | 1804 |
"set the mark for unwind flag in the receiver. |
1805 |
The VM needs this to know that some special action is to be performed with |
|
1806 |
this context - a highly internal mechanism and not for public use." |
|
1807 |
||
623 | 1808 |
%{ /* NOCONTEXT */ |
1133 | 1809 |
__INST(flags) = (OBJ)((INT)__INST(flags) | __MASKSMALLINT(__UNWIND_MARK)); |
623 | 1810 |
%} |
749 | 1811 |
|
1812 |
"Modified: 13.12.1995 / 19:05:22 / cg" |
|
623 | 1813 |
! |
1814 |
||
5780 | 1815 |
setHome:aContext |
1816 |
"set the homeContext. |
|
1817 |
DANGER: this is for experimental, internal use only (byteCode interpreters)" |
|
1818 |
||
1819 |
home := aContext. |
|
1820 |
! |
|
1821 |
||
1822 |
setSender:aContext |
|
1823 |
"set the sender of the context. |
|
1824 |
DANGER: this is for experimental, internal use only (byteCode interpreters)" |
|
1825 |
||
1826 |
%{ /* NOCONTEXT */ |
|
1827 |
__INST(sender_) = aContext; |
|
1828 |
%} |
|
1829 |
! |
|
1830 |
||
623 | 1831 |
unmarkForUnwind |
749 | 1832 |
"clear the mark for unwind flag in the receiver. |
1833 |
The VM needs this to know that some special action is to be performed with |
|
1834 |
this context - a highly internal mechanism and not for public use." |
|
1835 |
||
623 | 1836 |
%{ /* NOCONTEXT */ |
1133 | 1837 |
__INST(flags) = (OBJ)((INT)__INST(flags) & ~__MASKSMALLINT(__UNWIND_MARK)); |
623 | 1838 |
%} |
1839 |
! ! |
|
1840 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1841 |
!Context methodsFor:'searching'! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1842 |
|
8284 | 1843 |
findExceptional |
17757 | 1844 |
"walk along the sender chain (starting with the sender), |
8284 | 1845 |
for a context which is marked as handle or raise context. |
1846 |
This non-standard interface is only to be used by exception" |
|
1847 |
||
1848 |
"/ this could have been (actually: was) implemented as: |
|
1849 |
"/ |
|
1850 |
"/ |con| |
|
1851 |
"/ |
|
1852 |
"/ con := self. |
|
1853 |
"/ [con notNil] whileTrue:[ |
|
1854 |
"/ [con isHandleContext] ifTrue:[^con]. |
|
1855 |
"/ [con isRaiseContext] ifTrue:[^con]. |
|
1856 |
"/ con := con sender. |
|
1857 |
"/ ]. |
|
1858 |
"/ ^ nil |
|
1859 |
"/ |
|
1860 |
"/ and the code below does exactly this (somewhat faster, though). |
|
1861 |
"/ |
|
1862 |
"/ (it avoids referencing all intermediate contexts, which would mark them special, |
|
1863 |
"/ although they aren't really - this is expert knowledge, no need to understand that ...) |
|
1864 |
||
1865 |
%{ /* NOCONTEXT */ |
|
1866 |
||
1867 |
OBJ theContext; |
|
1868 |
||
1869 |
theContext = self; |
|
1870 |
while (__isNonNilObject(theContext)) { |
|
1871 |
if ((INT)(__ContextInstPtr(theContext)->c_flags) & __MASKSMALLINT(__HANDLE_MARK|__RAISE_MARK)) { |
|
1872 |
if (__isLazy(theContext)) { |
|
1873 |
__PATCHUPCONTEXT(theContext); |
|
1874 |
} |
|
1875 |
||
1876 |
if (! __isNonLIFO(theContext)) { |
|
17757 | 1877 |
/* |
1878 |
* to be prepared for the worst situation |
|
8284 | 1879 |
* (the sender is not stored, so the trap won't catch it) |
1880 |
* make the writeBarrier trigger manually. |
|
1881 |
* We'll see, if this is really required. |
|
1882 |
*/ |
|
1883 |
theContext->o_space |= CATCHMARK; |
|
1884 |
#if 0 |
|
1885 |
_markNonLIFO(theContext); |
|
1886 |
#endif |
|
1887 |
} |
|
1888 |
RETURN (theContext); |
|
1889 |
} |
|
1890 |
theContext = __ContextInstPtr(theContext)->c_sender; |
|
1891 |
} |
|
1892 |
%}. |
|
1893 |
^ nil |
|
1894 |
! |
|
1895 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1896 |
findNextContextWithSelector:selector1 or:selector2 or:selector3 |
17757 | 1897 |
"walk along the sender chain (starting with the sender), |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1898 |
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
|
1899 |
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
|
1900 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1901 |
"/ 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:
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diff
changeset
|
1902 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
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diff
changeset
|
1903 |
"/ |con| |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1904 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1905 |
"/ con := self sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1906 |
"/ [con notNil] whileTrue:[ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1907 |
"/ 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
|
1908 |
"/ con := con sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1909 |
"/ ]. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1910 |
"/ ^ nil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1911 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1912 |
"/ 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
|
1913 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1914 |
"/ (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
|
1915 |
"/ 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
|
1916 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1917 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
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diff
changeset
|
1918 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
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diff
changeset
|
1919 |
OBJ theContext; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
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diff
changeset
|
1920 |
OBJ sel; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
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diff
changeset
|
1921 |
OBJ __FETCHSELECTOR(); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
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diff
changeset
|
1922 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
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diff
changeset
|
1923 |
theContext = __INST(sender_); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
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diff
changeset
|
1924 |
while (__isNonNilObject(theContext)) { |
5422 | 1925 |
if (__isLazy(theContext)) { |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
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diff
changeset
|
1926 |
#ifdef TRADITIONAL_STACK_FRAME |
5422 | 1927 |
sel = __FETCHSELECTOR(theContext); |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1928 |
#else |
5422 | 1929 |
/* mhmh - not really needed */ |
1930 |
__PATCHUPCONTEXT(theContext); |
|
1931 |
sel = __ContextInstPtr(theContext)->c_selector; |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
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diff
changeset
|
1932 |
#endif |
5422 | 1933 |
} else { |
1934 |
sel = __ContextInstPtr(theContext)->c_selector; |
|
1935 |
} |
|
1936 |
||
1937 |
if ((sel == selector1) |
|
1938 |
|| ((selector2 != nil) && (sel == selector2)) |
|
1939 |
|| ((selector3 != nil) && (sel == selector3))) { |
|
1940 |
if (__isLazy(theContext)) { |
|
1941 |
__PATCHUPCONTEXT(theContext); |
|
1942 |
} |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
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diff
changeset
|
1943 |
|
5422 | 1944 |
if (! __isNonLIFO(theContext)) { |
17757 | 1945 |
/* |
1946 |
* to be prepared for the worst situation |
|
5422 | 1947 |
* (the sender is not stored, so the trap wont catch it) |
1948 |
* make the writeBarrier trigger manually. |
|
1949 |
* We'll see, if this is really required. |
|
1950 |
*/ |
|
1951 |
theContext->o_space |= CATCHMARK; |
|
1952 |
_markNonLIFO(theContext); |
|
1953 |
} |
|
1954 |
RETURN (theContext); |
|
1955 |
} |
|
1956 |
theContext = __ContextInstPtr(theContext)->c_sender; |
|
1957 |
} |
|
1958 |
RETURN (nil); |
|
1959 |
%}. |
|
1960 |
" |
|
1961 |
|con sel| |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
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diff
changeset
|
1962 |
|
5422 | 1963 |
con := self sender. |
1964 |
[con notNil] whileTrue:[ |
|
1965 |
sel := con selector. |
|
1966 |
sel == selector1 ifTrue:[^ con]. |
|
1967 |
(selector2 notNil and:[sel == selector2]) ifTrue:[^ con]. |
|
1968 |
(selector3 notNil and:[sel == selector3]) ifTrue:[^ con]. |
|
1969 |
con := con sender. |
|
1970 |
]. |
|
1971 |
^ nil |
|
1972 |
" |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1973 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1974 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1975 |
findNextUnwindContextOr:aContext |
17757 | 1976 |
"walk along the sender chain (starting at the sender), |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1977 |
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
|
1978 |
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
|
1979 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1980 |
"/ 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
|
1981 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1982 |
"/ |con| |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1983 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1984 |
"/ con := self sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1985 |
"/ [con notNil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1986 |
"/ and:[con ~~ aContext |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1987 |
"/ 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
|
1988 |
"/ ^ con |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1989 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1990 |
"/ 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
|
1991 |
"/ (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
|
1992 |
"/ 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
|
1993 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1994 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1995 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1996 |
OBJ theContext; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1997 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1998 |
if (self == aContext) { |
4485 | 1999 |
RETURN (self); |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2000 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2001 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2002 |
theContext = __INST(sender_); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2003 |
while (__isNonNilObject(theContext)) { |
4485 | 2004 |
if ((theContext == aContext) |
2005 |
|| ((INT)(__ContextInstPtr(theContext)->c_flags) & __MASKSMALLINT(__UNWIND_MARK))) { |
|
2006 |
if (__isLazy(theContext)) { |
|
2007 |
__PATCHUPCONTEXT(theContext); |
|
2008 |
} |
|
2009 |
if (! __isNonLIFO(theContext)) { |
|
2010 |
/* |
|
2011 |
* to be prepared for the worst situation |
|
2012 |
* (the sender is not stored, so the trap wont catch it) |
|
2013 |
* make the writeBarrier trigger manually. |
|
2014 |
* We'll see, if this is really required. |
|
2015 |
*/ |
|
2016 |
theContext->o_space |= CATCHMARK; |
|
2017 |
#if 0 |
|
2018 |
_markNonLIFO(theContext); |
|
2019 |
#endif |
|
2020 |
} |
|
2021 |
RETURN (theContext); |
|
2022 |
} |
|
2023 |
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
|
2024 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2025 |
%}. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2026 |
^ nil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2027 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2028 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2029 |
findSpecialHandle:findHandleContext raise:findRaiseContext |
17757 | 2030 |
"walk along the sender chain (starting with the sender), |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2031 |
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
|
2032 |
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
|
2033 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2034 |
"/ 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
|
2035 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2036 |
"/ |con| |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2037 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2038 |
"/ con := self sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2039 |
"/ [con notNil] whileTrue:[ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2040 |
"/ (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
|
2041 |
"/ (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
|
2042 |
"/ con := con sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2043 |
"/ ]. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2044 |
"/ ^ nil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2045 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2046 |
"/ 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
|
2047 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2048 |
"/ (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
|
2049 |
"/ 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
|
2050 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2051 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2052 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2053 |
OBJ theContext; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2054 |
int flagMask = 0; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2055 |
INT mask; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2056 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2057 |
if (findHandleContext == true) |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2058 |
flagMask = __HANDLE_MARK; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2059 |
if (findRaiseContext == true) |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2060 |
flagMask |= __RAISE_MARK; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2061 |
|
17757 | 2062 |
mask = __MASKSMALLINT(flagMask); |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2063 |
theContext = __INST(sender_); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2064 |
while (__isNonNilObject(theContext)) { |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2065 |
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
|
2066 |
if (__isLazy(theContext)) { |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2067 |
__PATCHUPCONTEXT(theContext); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2068 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2069 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2070 |
if (! __isNonLIFO(theContext)) { |
17757 | 2071 |
/* |
2072 |
* to be prepared for the worst situation |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2073 |
* (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
|
2074 |
* 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
|
2075 |
* 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
|
2076 |
*/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2077 |
theContext->o_space |= CATCHMARK; |
4485 | 2078 |
#if 0 |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2079 |
_markNonLIFO(theContext); |
4485 | 2080 |
#endif |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2081 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2082 |
RETURN (theContext); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2083 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2084 |
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
|
2085 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2086 |
%}. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2087 |
^ nil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2088 |
! ! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2089 |
|
1051 | 2090 |
!Context methodsFor:'special accessing'! |
2091 |
||
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2092 |
argAndVarNames |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2093 |
"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
|
2094 |
|
17757 | 2095 |
|homeContext method block numArgs numVars m src |
8217 | 2096 |
sel isDoIt blocksLineNr extractFromBlock sender| |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2097 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2098 |
numArgs := self numArgs. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2099 |
numVars := self numVars. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2100 |
(numArgs == 0 and:[numVars == 0]) ifTrue:[^ #()]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2101 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2102 |
homeContext := self methodHome. |
7652 | 2103 |
homeContext notNil ifTrue:[ |
2104 |
sel := homeContext selector. |
|
2105 |
method := homeContext method. |
|
2106 |
]. |
|
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2107 |
|
17757 | 2108 |
extractFromBlock := |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2109 |
[ |
8772
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2110 |
|blockNode argNames varNames vars args blocksHome| |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2111 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2112 |
blockNode := Compiler |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2113 |
blockAtLine:blocksLineNr |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2114 |
in:m |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2115 |
orSource:src |
17757 | 2116 |
numArgs:numArgs |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2117 |
numVars:numVars. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2118 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2119 |
blockNode notNil ifTrue:[ |
8772
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2120 |
"/ a kludge |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2121 |
blockNode lineNumber == blocksLineNr ifTrue:[ |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2122 |
blocksHome := blockNode home. |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2123 |
(blocksHome notNil and:[blocksHome isBlockNode]) ifTrue:[ |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2124 |
(blocksHome numArgs == numArgs |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2125 |
and:[ blocksHome numVars == numVars ]) ifTrue:[ |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2126 |
blockNode := blocksHome |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2127 |
]. |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2128 |
]. |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2129 |
]. |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2130 |
|
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2131 |
argNames := #(). |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2132 |
varNames := #(). |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2133 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2134 |
numArgs > 0 ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2135 |
vars := blockNode arguments. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2136 |
vars size > 0 ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2137 |
argNames := vars collect:[:var | var name] |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2138 |
] |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2139 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2140 |
numVars > 0 ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2141 |
vars := blockNode variables. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2142 |
vars size > 0 ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2143 |
varNames := vars collect:[:var | var name]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2144 |
] |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2145 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2146 |
^ argNames , varNames |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2147 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2148 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2149 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2150 |
"/ #doIt needs special handling below |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2151 |
isDoIt := (sel == #'doIt') or:[sel == #'doIt:']. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2152 |
self isBlockContext ifFalse:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2153 |
isDoIt ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2154 |
method notNil ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2155 |
"/ special for #doIt |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2156 |
m := nil. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2157 |
src := ('[' , method source , '\]') withCRs. |
8217 | 2158 |
"/ blocksLineNr := self lineNumber. |
8242
594cfd2150f7
oops - must care for doIt contexts
Claus Gittinger <cg@exept.de>
parents:
8217
diff
changeset
|
2159 |
blocksLineNr := (self home ? self) lineNumber. |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2160 |
extractFromBlock value. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2161 |
] |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2162 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2163 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2164 |
method notNil ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2165 |
^ method methodArgAndVarNames. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2166 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2167 |
^ #() |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2168 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2169 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2170 |
method notNil ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2171 |
isDoIt ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2172 |
"/ special for #doIt |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2173 |
"/ my source is found in the method. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2174 |
m := nil. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2175 |
src := ('[' , method source , '\]') withCRs. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2176 |
] ifFalse:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2177 |
m := method. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2178 |
src := nil. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2179 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2180 |
blocksLineNr := self lineNumber. |
8020 | 2181 |
extractFromBlock value. |
7747
27be5f627b03
fixed argAndVarNames for inner blocks.
Claus Gittinger <cg@exept.de>
parents:
7652
diff
changeset
|
2182 |
blocksLineNr := self home lineNumber. |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2183 |
extractFromBlock value. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2184 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2185 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2186 |
blocksLineNr isNil ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2187 |
self isBlockContext ifTrue:[ |
8217 | 2188 |
sender := self sender. |
2189 |
(sender notNil |
|
2190 |
and:[sender receiver isBlock |
|
2191 |
and:[sender selector startsWith:'value']]) |
|
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2192 |
ifTrue:[ |
8217 | 2193 |
block := sender receiver. |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2194 |
src := block source. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2195 |
src isNil ifTrue:[ |
8488 | 2196 |
self error:'no source'. |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2197 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2198 |
blocksLineNr := 1. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2199 |
extractFromBlock value. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2200 |
]. |
8217 | 2201 |
sender := nil. |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2202 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2203 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2204 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2205 |
^ #() |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2206 |
! |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2207 |
|
4557 | 2208 |
canResume |
2209 |
"return true, if the receiver allows to be resumed. |
|
2210 |
Due to the implementation, this requires that the context which |
|
2211 |
is right below the receiver is returnable." |
|
2212 |
||
2213 |
|theContext| |
|
2214 |
||
2215 |
" |
|
2216 |
starting with this context, find the one below |
|
2217 |
(i.e. the one that I have called) and return from it. |
|
2218 |
" |
|
2219 |
%{ |
|
2220 |
OBJ sndr; |
|
2221 |
||
2222 |
theContext = __thisContext; |
|
2223 |
while (theContext != nil) { |
|
2224 |
sndr = __ContextInstPtr(theContext)->c_sender; |
|
2225 |
if (sndr == self) break; |
|
2226 |
theContext = sndr; |
|
2227 |
} |
|
2228 |
if (theContext != nil) { |
|
2229 |
if (__isLazy(theContext)) { |
|
2230 |
__PATCHUPCONTEXT(theContext); |
|
2231 |
} |
|
2232 |
} |
|
2233 |
%}. |
|
2234 |
theContext isNil ifTrue:[ |
|
2235 |
^ false |
|
2236 |
]. |
|
2237 |
^ theContext canReturn |
|
2238 |
! |
|
2239 |
||
1051 | 2240 |
canReturn |
2241 |
"return true, if the receiver allows returning through it. |
|
4557 | 2242 |
Blocks, (currently) always return false. |
2646 | 2243 |
Methods which contain a (non-inlined) block are always |
2244 |
returnable - for other methods, it depends on how the system |
|
2245 |
was compiled (stc flag +/-optContext). |
|
2246 |
If it was compiled with +optContext, methods are compiled |
|
4557 | 2247 |
non returnable, unless a return-pragma was present in the method. |
2646 | 2248 |
Since this saves some administrative work in every method |
2249 |
invocation and makes overall execution faster, the system classes |
|
2250 |
are all compiled with this flag turned on." |
|
1051 | 2251 |
|
2252 |
%{ /* NOCONTEXT */ |
|
2253 |
||
3508 | 2254 |
RETURN ( ((INT)(__INST(flags)) & __MASKSMALLINT(__CANNOT_RETURN)) ? false : true ); |
5441 | 2255 |
%}. |
2256 |
^ true |
|
1051 | 2257 |
! |
2258 |
||
1492 | 2259 |
hasStackToShow |
2646 | 2260 |
"private interface to the debugger. |
2261 |
Smalltalk contexts return false here - other language frames |
|
2262 |
(i.e. Java frames) may want to show the evaluation stack" |
|
2263 |
||
1492 | 2264 |
^ false |
2265 |
||
2266 |
"Created: 28.6.1996 / 14:48:39 / cg" |
|
2646 | 2267 |
"Modified: 13.5.1997 / 16:31:12 / cg" |
1492 | 2268 |
! |
2269 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2270 |
isHandleContext |
4505 | 2271 |
"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
|
2272 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2273 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2274 |
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
|
2275 |
%} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2276 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2277 |
|
1051 | 2278 |
isNonLifo |
2646 | 2279 |
"return true, if this is a nonLifo context. |
2280 |
A nonLifo context is one that is still on the machine stack, |
|
2281 |
but has a reference taken and needs to be converted to a real |
|
2282 |
object (in objectMemory) when the method/block returns. |
|
2283 |
You dont have to understand this - this is a special ST/X |
|
2284 |
debug query, which may be removed without notice." |
|
1051 | 2285 |
|
2286 |
%{ /* NOCONTEXT */ |
|
1133 | 2287 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__NONLIFO)) ? true : false ); |
1051 | 2288 |
%} |
2289 |
! |
|
2290 |
||
2291 |
isOnMachineStack |
|
17757 | 2292 |
"return true, if this is a machine stack context as opposed to a |
2646 | 2293 |
real heap context. |
2294 |
You dont have to understand this - this is a special ST/X |
|
2295 |
debug query, which may be removed without notice." |
|
1051 | 2296 |
|
2297 |
%{ /* NOCONTEXT */ |
|
2298 |
RETURN ( (__qSpace(self) >= STACKSPACE) ? true : false ); |
|
2299 |
%} |
|
2300 |
! |
|
2301 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2302 |
isRaiseContext |
4505 | 2303 |
"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
|
2304 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2305 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2306 |
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
|
2307 |
%} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2308 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2309 |
|
1051 | 2310 |
isSpecial |
2311 |
"return true, if this is either a nonLifo or interrupted context" |
|
2312 |
||
2313 |
%{ /* NOCONTEXT */ |
|
1133 | 2314 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__SPECIAL)) ? true : false ); |
1051 | 2315 |
%} |
2316 |
! |
|
2317 |
||
2318 |
isUnwindContext |
|
2319 |
"return true, if this is an unwindContext" |
|
2320 |
||
2321 |
%{ /* NOCONTEXT */ |
|
1133 | 2322 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__UNWIND_MARK)) ? true : false ); |
1051 | 2323 |
%} |
8578 | 2324 |
! |
2325 |
||
2326 |
tempNames |
|
2327 |
"helper: given a context, return a collection of arg, var and temporary names" |
|
2328 |
||
2329 |
|names nTemps| |
|
2330 |
||
2331 |
names := self argAndVarNames. |
|
2332 |
(nTemps := self numTemps) > 0 ifTrue:[ |
|
2333 |
^ names , ((1 to:nTemps) collect:[:idx | '_tmp' , idx printString]). |
|
2334 |
]. |
|
2335 |
^ names. |
|
1051 | 2336 |
! ! |
2337 |
||
623 | 2338 |
!Context methodsFor:'testing'! |
2339 |
||
2340 |
isBlockContext |
|
2341 |
"return true, iff the receiver is a BlockContext, false otherwise" |
|
2342 |
||
2343 |
^ false |
|
2344 |
! |
|
2345 |
||
2346 |
isContext |
|
2347 |
"return true, iff the receiver is a Context, false otherwise" |
|
2348 |
||
2349 |
^ true |
|
2350 |
! |
|
2351 |
||
2352 |
isRecursive |
|
2353 |
"return true, if this context is one of a recursive send of the same |
|
1483 | 2354 |
selector to the same receiver before. |
2355 |
Here, different arguments are ignored - i.e. only the same method |
|
2356 |
counts for recursiveness. |
|
623 | 2357 |
Used to detect recursive errors or recursive printing - for example." |
2358 |
||
2291
af7652b82404
avoid touching contexts (making them nonLifo) when searching for unwind-contexts,
Claus Gittinger <cg@exept.de>
parents:
2285
diff
changeset
|
2359 |
|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
|
2360 |
|
af7652b82404
avoid touching contexts (making them nonLifo) when searching for unwind-contexts,
Claus Gittinger <cg@exept.de>
parents:
2285
diff
changeset
|
2361 |
count := 0. |
af7652b82404
avoid touching contexts (making them nonLifo) when searching for unwind-contexts,
Claus Gittinger <cg@exept.de>
parents:
2285
diff
changeset
|
2362 |
|
2893 | 2363 |
c := self findNextContextWithSelector:selector or:nil or:nil. |
623 | 2364 |
[c notNil] whileTrue:[ |
17757 | 2365 |
(c receiver == receiver) ifTrue:[ |
2366 |
" |
|
2367 |
stupid: the current ST/X context does not include |
|
2368 |
the method, but the class, in which the search started ... |
|
2369 |
" |
|
2370 |
myMethodsClass isNil ifTrue:[ |
|
2371 |
myMethodsClass := self methodClass. |
|
2372 |
]. |
|
2373 |
c methodClass == myMethodsClass ifTrue:[ |
|
2374 |
^ true |
|
2375 |
] |
|
2376 |
]. |
|
2377 |
c := c findNextContextWithSelector:selector or:nil or:nil. |
|
2378 |
||
2379 |
" |
|
2380 |
this special test was added to get out after a while |
|
2381 |
if the sender chain is corrupt - this gives us at least |
|
2382 |
a chance to find those errors. |
|
2383 |
" |
|
2384 |
count := count + 1. |
|
2385 |
count >= 100000 ifTrue:[ |
|
2386 |
'Context [warning]: bad context chain' errorPrintCR. |
|
2387 |
^ true |
|
2388 |
] |
|
623 | 2389 |
]. |
2390 |
^ false |
|
1483 | 2391 |
|
2135
6bd144c1c358
newStyle info & error messages
Claus Gittinger <cg@exept.de>
parents:
1853
diff
changeset
|
2392 |
"Modified: 10.1.1997 / 17:34:26 / cg" |
623 | 2393 |
! ! |
2394 |
||
1810 | 2395 |
!Context class methodsFor:'documentation'! |
749 | 2396 |
|
2397 |
version |
|
17797 | 2398 |
^ '$Id: Context.st 10570 2010-08-26 10:12:57Z vranyj1 $' |
17736 | 2399 |
! |
2400 |
||
2401 |
version_CVS |
|
17797 | 2402 |
^ 'Header: /cvs/stx/stx/libbasic/Context.st,v 1.158 2010/08/14 10:56:21 cg Exp ' |
17740
55fb39bdf20e
Initial support for method sandboxing.
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
17736
diff
changeset
|
2403 |
! |
55fb39bdf20e
Initial support for method sandboxing.
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
17736
diff
changeset
|
2404 |
|
55fb39bdf20e
Initial support for method sandboxing.
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
17736
diff
changeset
|
2405 |
version_SVN |
17797 | 2406 |
^ '$Id: Context.st 10570 2010-08-26 10:12:57Z vranyj1 $' |
749 | 2407 |
! ! |
7257 | 2408 |
|
623 | 2409 |
Context initialize! |
17756 | 2410 |
|
17757 | 2411 |
|
17767 | 2412 |
|
17772
6e0b3c06c364
Method reverted to r10532
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
17767
diff
changeset
|
2413 |
|
17780 | 2414 |
|
17797 | 2415 |