author | Claus Gittinger <cg@exept.de> |
Fri, 13 Feb 2009 16:10:33 +0100 | |
changeset 11542 | 7596aebedb86 |
parent 11540 | fc5339c7ff8c |
child 11543 | 38746c475d5a |
permissions | -rw-r--r-- |
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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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This software is furnished under a license and may be used |
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only in accordance with the terms of that license and with the |
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inclusion of the above copyright notice. This software may not |
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be provided or otherwise made available to, or used by, any |
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other person. No title to or ownership of the software is |
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hereby transferred. |
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" |
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"{ Package: 'stx:libbasic' }" |
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||
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Object variableSubclass:#Context |
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instanceVariableNames:'flags sender* home receiver selector searchClass 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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!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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This software is furnished under a license and may be used |
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only in accordance with the terms of that license and with the |
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inclusion of the above copyright notice. This software may not |
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be provided or otherwise made available to, or used by, any |
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other person. No title to or ownership of the software is |
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hereby transferred. |
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" |
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! |
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||
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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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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 |
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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 |
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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. |
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(there may be some small performance penalty for this, though). |
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LineNumbers vs. program counter: |
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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: |
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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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Returning from a dead method: |
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Blocksreturn 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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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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<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:[ |
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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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! ! |
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!Context class methodsFor:'Signal constants'! |
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cannotResumeSignal |
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"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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<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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! ! |
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!Context class methodsFor:'error handling'! |
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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, |
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which non-collection send invoked a bad collection-method)." |
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|con count| |
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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 < 4 or:[con receiver isCollection]]]. |
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233 |
" |
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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'! |
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isBuiltInClass |
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"return true if this class is known by the run-time-system. |
242 |
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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! ! |
248 |
||
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!Context class methodsFor:'special searching'! |
250 |
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251 |
findFirstSpecialHandle:searchForHandle raise:searchForRaise |
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|c| |
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253 |
||
254 |
%{ |
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OBJ __c__; |
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256 |
||
257 |
__c__ = __ContextInstPtr(__thisContext)->c_sender; |
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if (!__isNonNilObject(__c__)) { |
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RETURN(nil) |
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} |
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if (__isLazy(__c__)) { |
262 |
__PATCHUPCONTEXT(__c__); |
|
263 |
} |
|
264 |
c = __c__; |
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265 |
%}. |
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^ c findSpecialHandle:searchForHandle raise:searchForRaise |
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! ! |
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||
7261 | 269 |
!Context methodsFor:'Compatibility-VW'! |
5983 | 270 |
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resumeWith:value |
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272 |
"same as #resume: - visualWorks compatibility" |
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||
274 |
self resume:value |
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! ! |
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||
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!Context methodsFor:'accessing'! |
278 |
||
279 |
argAt:n |
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"return the n'th argument" |
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||
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n > self numArgs ifTrue:[ |
3143 | 283 |
^ self error:'invalid arg access' |
1726 | 284 |
]. |
623 | 285 |
^ self at:n |
1726 | 286 |
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"Modified: 12.10.1996 / 21:44:28 / cg" |
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623 | 288 |
! |
289 |
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290 |
argAt:n put:value |
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"set the n'th argument - useful when the receiver should be restarted" |
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n > self numArgs ifTrue:[ |
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^ self error:'invalid arg access' |
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]. |
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self at:n put:value. |
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^ value |
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299 |
"Modified: 12.10.1996 / 21:44:32 / cg" |
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! |
301 |
||
302 |
args |
|
303 |
"return an array filled with the arguments of this context" |
|
304 |
||
305 |
|n| |
|
306 |
||
307 |
n := self numArgs. |
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3130 | 308 |
n == 0 ifTrue:[ |
309 |
"/ little optimization here - avaoid creating empty containers |
|
310 |
^ #() |
|
311 |
]. |
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623 | 312 |
^ (Array new:n) replaceFrom:1 to:n with:self. |
313 |
! |
|
154 | 314 |
|
623 | 315 |
argsAndVars |
316 |
"return an array filled with the arguments and variables of this context" |
|
317 |
||
318 |
|n| |
|
319 |
||
1810 | 320 |
n := self numArgs + self numVars. |
3130 | 321 |
n == 0 ifTrue:[ |
3143 | 322 |
"/ little optimization here - avoid creating empty containers |
3130 | 323 |
^ #() |
324 |
]. |
|
623 | 325 |
^ (Array new:n) replaceFrom:1 to:n with:self. |
1810 | 326 |
|
327 |
"Modified: 23.10.1996 / 16:19:41 / cg" |
|
623 | 328 |
! |
154 | 329 |
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argumentCount |
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"ANSI alias for numArgs: return the number of arguments to the Block/Method" |
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|
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333 |
%{ /* NOCONTEXT */ |
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334 |
|
8913 | 335 |
RETURN ( __mkSmallInteger( (__intVal(__INST(flags)) >> __NARG_SHIFT) & __NARG_MASK) ); |
8687
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336 |
%} |
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! |
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338 |
|
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at:n put:value |
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340 |
super at:n put:value. |
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|
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|
342 |
"/ need some aid for optimized code - |
9e145a7ae670
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|
343 |
"/ some machines have the arguments/receiver etc. kept in register vars ... |
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need unfix, when changed via at:put:
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|
344 |
"/ the unfix updates the machine-stack version of the receiver. |
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|
345 |
%{ |
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|
346 |
__UNFIXCONTEXT(self, 0); |
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347 |
%}. |
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348 |
^ value |
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349 |
! |
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|
350 |
|
623 | 351 |
home |
352 |
"return the immediate home of the receiver. |
|
353 |
for block contexts, this is the methodcontext, where the block was created, |
|
354 |
for nested block contexts, its the surrounding blocks context. |
|
355 |
for method-contexts this is nil." |
|
25 | 356 |
|
623 | 357 |
^ nil "home" |
358 |
! |
|
1 | 359 |
|
3324
0295f7b3b208
Add #homeReceiver (as in ST80).
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360 |
homeReceiver |
0295f7b3b208
Add #homeReceiver (as in ST80).
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changeset
|
361 |
"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
|
362 |
|
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
363 |
^ receiver |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
364 |
|
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
365 |
"Created: / 5.3.1998 / 16:18:26 / stefan" |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
366 |
! |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
367 |
|
1 | 368 |
instVarAt:index |
69 | 369 |
"have to catch instVar access to retVal and handle - they are invalid. |
370 |
Notice, that one of the next ST/X versions will get some syntactic |
|
371 |
extension to get this automatically)." |
|
1 | 372 |
|
3508 | 373 |
(index == 2) ifTrue:[^ self sender]."/ sender - must be accessed specially |
3182
2526de1e5030
dont allow setting of the sender via instVarAt:put:
Claus Gittinger <cg@exept.de>
parents:
3143
diff
changeset
|
374 |
(index == 8) ifTrue:[^ nil]. "/ retvalTemp - invisible |
2526de1e5030
dont allow setting of the sender via instVarAt:put:
Claus Gittinger <cg@exept.de>
parents:
3143
diff
changeset
|
375 |
(index == 9) ifTrue:[^ nil]. "/ handle to machine stack - invisible |
1 | 376 |
^ super instVarAt:index |
377 |
! |
|
378 |
||
379 |
instVarAt:index put:value |
|
69 | 380 |
"have to catch instVar access to retVal and handle - they are invalid. |
381 |
Notice, that one of the next ST/X versions will get some syntactic |
|
382 |
extension to get this automatically)." |
|
1 | 383 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
384 |
(index == 2) ifTrue:[^ nil]. "/ sender - not allowed to change |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
385 |
(index == 8) ifTrue:[^ nil]. "/ retvalTemp - not allowed to change |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
386 |
(index == 9) ifTrue:[^ nil]. "/ handle to machine stack - not allowed to change |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
387 |
super instVarAt:index put:value. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
388 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
389 |
"/ need some aid for optimized code - |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
390 |
"/ 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
|
391 |
"/ 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
|
392 |
%{ |
4570 | 393 |
__UNFIXCONTEXT(self, 0); |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
394 |
%}. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
395 |
^ value |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
396 |
|
1 | 397 |
! |
398 |
||
4328
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
399 |
javaLineNumber |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
400 |
|nr pc| |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
401 |
|
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
402 |
lineNr notNil ifTrue:[ |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
403 |
pc := lineNr bitAnd:16rFFFF. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
404 |
]. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
405 |
|
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
406 |
"/ '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
|
407 |
pc isNil ifTrue:[ |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
408 |
nr := self lineNumberFromMethod. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
409 |
nr notNil ifTrue:[ |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
410 |
^ nr |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
411 |
]. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
412 |
" '-> 0 [a]' printCR. " |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
413 |
^0 |
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 |
|
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
416 |
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
|
417 |
nr isNil ifTrue:[ |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
418 |
nr := self lineNumberFromMethod. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
419 |
nr notNil ifTrue:[ |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
420 |
^ nr |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
421 |
]. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
422 |
" '-> 0 [b]' printCR. " |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
423 |
^ 0 |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
424 |
]. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
425 |
"/ '-> ' print. nr printCR. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
426 |
^ nr. |
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 |
|
623 | 430 |
lineNumber |
431 |
"this returns the lineNumber within the methods source, where the context was |
|
432 |
interrupted or called another method. (currently, sometimes this information |
|
433 |
is not available - in this case 0 is returned)" |
|
1 | 434 |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
435 |
|l| |
3923 | 436 |
|
4328
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
437 |
receiver isJavaObject ifTrue:[ |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
438 |
"/ 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
|
439 |
self method isJavaMethod ifTrue:[ |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
440 |
^ self javaLineNumber |
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 |
]. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
443 |
|
3923 | 444 |
lineNr notNil ifTrue:[ |
445 |
l := lineNr bitAnd:16rFFFF. |
|
446 |
]. |
|
447 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
448 |
"/ self isJavaContext ifTrue:[ |nr m| |
3923 | 449 |
"/ m := self method. |
450 |
"/ l isNil ifTrue:[ |
|
451 |
"/ m notNil ifTrue:[ |
|
452 |
"/ nr := m lineNumber |
|
453 |
"/ ]. |
|
454 |
"/ nr notNil ifTrue:[ |
|
455 |
"/ ^ nr |
|
456 |
"/ ]. |
|
457 |
"/ ^0 |
|
458 |
"/ ]. |
|
459 |
"/ nr := self method lineNumberForPC:l. |
|
460 |
"/ nr isNil ifTrue:[ |
|
461 |
"/ m notNil ifTrue:[ |
|
462 |
"/ nr := m lineNumber |
|
463 |
"/ ]. |
|
464 |
"/ nr notNil ifTrue:[ |
|
465 |
"/ ^ nr |
|
466 |
"/ ]. |
|
467 |
"/ ^ 0 |
|
468 |
"/ ]. |
|
469 |
"/ ^ nr. |
|
470 |
"/ ]. |
|
471 |
||
472 |
^ l |
|
473 |
||
474 |
"Modified: / 10.11.1998 / 13:19:48 / cg" |
|
1 | 475 |
! |
476 |
||
4450 | 477 |
lineNumberFromMethod |
478 |
^ 1 |
|
479 |
! |
|
480 |
||
8488 | 481 |
message |
482 |
^ Message selector:selector arguments:self args |
|
483 |
||
484 |
" |
|
9355 | 485 |
thisContext methodHome message |
486 |
thisContext message |
|
8488 | 487 |
" |
488 |
! |
|
489 |
||
1 | 490 |
method |
54 | 491 |
"return the method for which the receiver was created. |
492 |
To save time during normal execution, this information is not held in the |
|
493 |
context, but computed here on request." |
|
1 | 494 |
|
3508 | 495 |
|c sender sendersSelector m| |
1 | 496 |
|
325 | 497 |
c := self searchClass. |
498 |
" |
|
499 |
the below cannot happen in normal circumstances |
|
500 |
(added to avoid recursive errors in case of a broken sender chain) |
|
501 |
" |
|
502 |
c isBehavior ifFalse:[ |
|
3143 | 503 |
'Context [error]: non class in searchClass' errorPrintCR. |
504 |
' selector: ' errorPrint. selector errorPrint. |
|
505 |
' receiver: ' errorPrint. receiver errorPrintCR. |
|
506 |
^ nil |
|
325 | 507 |
]. |
508 |
||
328 | 509 |
c := c whichClassIncludesSelector:selector. |
1 | 510 |
c notNil ifTrue:[ |
3143 | 511 |
^ c compiledMethodAt:selector |
1 | 512 |
]. |
216 | 513 |
|
3508 | 514 |
"mhmh - seems to be a context for an unbound method (as generated by doIt); |
216 | 515 |
look in the senders context. Consider this a kludge. |
3143 | 516 |
(maybe it was not too good of an idea to NOT keep the current |
517 |
method in the context ...) |
|
518 |
Future versions of ST/X's message lookup may store the method in |
|
519 |
the context. |
|
216 | 520 |
" |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
521 |
sender := self sender. |
3143 | 522 |
sender notNil ifTrue:[ |
523 |
sendersSelector := sender selector. |
|
524 |
sendersSelector notNil ifTrue:[ |
|
525 |
(sendersSelector startsWith:'valueWithReceiver:') ifTrue:[ |
|
3508 | 526 |
m := sender receiver. |
527 |
m isMethod ifTrue:[ |
|
528 |
^ m |
|
529 |
] |
|
3143 | 530 |
] |
531 |
] |
|
216 | 532 |
]. |
533 |
||
1 | 534 |
^ nil |
2135
6bd144c1c358
newStyle info & error messages
Claus Gittinger <cg@exept.de>
parents:
1853
diff
changeset
|
535 |
|
3143 | 536 |
"Modified: / 4.1.1998 / 21:15:32 / cg" |
1 | 537 |
! |
538 |
||
212 | 539 |
methodClass |
540 |
"return the class in which the method for which the receiver was created is." |
|
541 |
||
1456 | 542 |
|cls m| |
543 |
||
544 |
cls := self searchClass. |
|
3923 | 545 |
(cls isMeta |
546 |
and:[cls soleInstance isJavaClass]) ifTrue:[ |
|
547 |
cls := cls soleInstance |
|
548 |
]. |
|
1456 | 549 |
|
3923 | 550 |
[cls notNil] whileTrue:[ |
551 |
cls := cls whichClassIncludesSelector:selector. |
|
552 |
cls isNil ifTrue:[^ nil]. |
|
553 |
||
554 |
m := cls compiledMethodAt:selector. |
|
555 |
m notNil ifTrue:[ |
|
556 |
m isIgnored ifFalse:[^ cls]. |
|
557 |
]. |
|
558 |
cls := cls superclass |
|
1456 | 559 |
]. |
560 |
^ cls |
|
561 |
||
3923 | 562 |
"Modified: / 5.11.1998 / 19:07:43 / cg" |
212 | 563 |
! |
564 |
||
623 | 565 |
methodHome |
566 |
"return the method-home - for method contexts this is the receiver" |
|
567 |
||
568 |
^ self |
|
569 |
! |
|
570 |
||
571 |
ntemp |
|
572 |
"return the number of temporary variables of the Block/Method. |
|
1810 | 573 |
(for debugging only). |
574 |
I dont like the name of this method; its here for compatibility." |
|
623 | 575 |
|
1810 | 576 |
^ self numTemps |
577 |
||
578 |
"Modified: 23.10.1996 / 16:19:06 / cg" |
|
623 | 579 |
! |
580 |
||
581 |
numArgs |
|
582 |
"return the number of arguments to the Block/Method" |
|
583 |
||
584 |
%{ /* NOCONTEXT */ |
|
585 |
||
8913 | 586 |
RETURN ( __mkSmallInteger( (__intVal(__INST(flags)) >> __NARG_SHIFT) & __NARG_MASK) ); |
623 | 587 |
%} |
588 |
! |
|
589 |
||
1810 | 590 |
numTemps |
591 |
"return the number of temporary variables of the Block/Method. |
|
592 |
(for debugging only)" |
|
593 |
||
594 |
^ self size - self numArgs - self numVars |
|
595 |
||
596 |
"Created: 23.10.1996 / 16:19:10 / cg" |
|
597 |
"Modified: 23.10.1996 / 16:19:48 / cg" |
|
598 |
! |
|
599 |
||
600 |
numVars |
|
623 | 601 |
"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
|
602 |
|
623 | 603 |
%{ /* NOCONTEXT */ |
604 |
||
8913 | 605 |
RETURN ( __mkSmallInteger( (__intVal(__INST(flags)) >> __NVAR_SHIFT) & __NVAR_MASK) ); |
623 | 606 |
%} |
607 |
! |
|
608 |
||
1810 | 609 |
nvars |
610 |
"return the number of local variables of the Block/Method. |
|
611 |
I dont like the name of this method; its here for compatibility." |
|
612 |
||
613 |
^ self numVars |
|
614 |
||
615 |
"Modified: 23.10.1996 / 16:18:44 / cg" |
|
616 |
! |
|
617 |
||
623 | 618 |
receiver |
619 |
"return the receiver of the context" |
|
620 |
||
621 |
^ receiver |
|
622 |
! |
|
623 |
||
4543 | 624 |
receiver:aCompiledCode |
625 |
"set the receiver of the message" |
|
626 |
||
4560
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
627 |
receiver := aCompiledCode. |
4543 | 628 |
|
4560
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
629 |
"/ need some aid for optimized code - |
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
630 |
"/ some machines have the arguments kept in register vars ... |
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
631 |
"/ 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
|
632 |
%{ |
4570 | 633 |
__UNFIXCONTEXT(self, 0); |
4560
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
634 |
%}. |
4543 | 635 |
|
636 |
! |
|
637 |
||
623 | 638 |
searchClass |
639 |
"this is the class where the method-lookup started; |
|
640 |
for normal sends, it is nil (or sometimes the receivers class). |
|
641 |
For supersends, its the superclass of the one, in which the |
|
642 |
caller was defined." |
|
643 |
||
644 |
searchClass notNil ifTrue:[^ searchClass]. |
|
645 |
^ receiver class |
|
646 |
! |
|
647 |
||
648 |
selector |
|
649 |
"return the selector of the method for which the context was created" |
|
650 |
||
651 |
^ selector |
|
536
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
652 |
! |
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
653 |
|
1 | 654 |
sender |
655 |
"return the sender of the context" |
|
656 |
||
536
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
657 |
%{ /* NOCONTEXT */ |
1668
41db5950f9ea
oops - con local variables are now renamed (last change in stc)
Claus Gittinger <cg@exept.de>
parents:
1492
diff
changeset
|
658 |
OBJ theContext; |
536
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
659 |
|
3508 | 660 |
theContext = __INST(sender_); |
949 | 661 |
/* |
662 |
* this special nil test is for the very first context (startup-context); |
|
663 |
* actually, its cosmetics, to avoid a visible nil>>nil context in the debugger. |
|
664 |
*/ |
|
2205 | 665 |
if (__isNonNilObject(theContext)) { |
949 | 666 |
|
1668
41db5950f9ea
oops - con local variables are now renamed (last change in stc)
Claus Gittinger <cg@exept.de>
parents:
1492
diff
changeset
|
667 |
if (__isLazy(theContext)) { |
536
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
668 |
/* |
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
669 |
* this cannot happen |
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
670 |
*/ |
2212 | 671 |
__PATCHUPCONTEXT(theContext); |
536
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
672 |
} |
3508 | 673 |
if (! __isNonLIFO(theContext)) { |
674 |
/* |
|
675 |
* to be prepared for the worst situation |
|
676 |
* (the sender is not stored, so the trap wont catch it) |
|
677 |
* make the writeBarrier trigger manually. |
|
678 |
* We'll see, if this is really required. |
|
679 |
*/ |
|
680 |
theContext->o_space |= CATCHMARK; |
|
681 |
_markNonLIFO(theContext); |
|
682 |
} |
|
536
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
683 |
} |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
684 |
RETURN (theContext); |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
685 |
%} |
1 | 686 |
! |
687 |
||
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
688 |
senderIsNil |
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
689 |
"return true, if I have no sender" |
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
690 |
|
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
691 |
%{ /* NOCONTEXT */ |
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
692 |
if ( __INST(sender_) == nil ) { |
5422 | 693 |
RETURN (true); |
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
694 |
} |
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
695 |
RETURN (false); |
5422 | 696 |
%}. |
697 |
^ self sender isNil |
|
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
698 |
! |
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
699 |
|
623 | 700 |
setLineNumber:aNumber |
701 |
"private entry for uncompiledCodeObject ..." |
|
1 | 702 |
|
623 | 703 |
lineNr := aNumber |
340 | 704 |
! |
705 |
||
5749 | 706 |
setNumArgs:nA numVars:nV |
707 |
"set the number of arguments and variables" |
|
708 |
||
709 |
%{ /* NOCONTEXT */ |
|
8910 | 710 |
INT flg; |
5749 | 711 |
|
712 |
flg = __intVal(__INST(flags)); |
|
713 |
flg = flg & ~(__NARG_MASK << __NARG_SHIFT); |
|
714 |
flg = flg & ~(__NVAR_MASK << __NVAR_SHIFT); |
|
715 |
flg = flg | __intVal(nA) << __NARG_SHIFT; |
|
716 |
flg = flg | __intVal(nV) << __NVAR_SHIFT; |
|
8913 | 717 |
__INST(flags) = __mkSmallInteger(flg); |
5749 | 718 |
%} |
719 |
! |
|
720 |
||
8578 | 721 |
tempAt:index |
722 |
"return the n'th stack-temporary variable" |
|
723 |
||
724 |
^ self at:index |
|
725 |
! |
|
726 |
||
202 | 727 |
temporaries |
728 |
"return an array filled with the temporaries of this context" |
|
729 |
||
308 | 730 |
|nonTemps mySize| |
202 | 731 |
|
1810 | 732 |
nonTemps := self numArgs + self numVars. |
733 |
mySize := self numTemps. |
|
3130 | 734 |
mySize == 0 ifTrue:[ |
735 |
"/ little optimization here - avaoid creating empty containers |
|
736 |
^ #() |
|
737 |
]. |
|
308 | 738 |
^ (Array new:mySize) replaceFrom:1 to:mySize with:self startingAt:nonTemps+1 |
1810 | 739 |
|
740 |
"Modified: 23.10.1996 / 16:20:00 / cg" |
|
202 | 741 |
! |
742 |
||
10 | 743 |
varAt:n |
744 |
"return the n'th local variable" |
|
745 |
||
154 | 746 |
^ self at:(n + self numArgs) |
10 | 747 |
! |
748 |
||
749 |
varAt:n put:value |
|
750 |
"set the n'th local variable - useful when the receiver should be restarted |
|
54 | 751 |
or continued" |
10 | 752 |
|
154 | 753 |
self at:(n + self numArgs) put:value |
10 | 754 |
! |
755 |
||
623 | 756 |
vars |
757 |
"return an array filled with the local variables of this context" |
|
375 | 758 |
|
623 | 759 |
|nonVars mySize| |
360 | 760 |
|
623 | 761 |
nonVars := self numArgs. |
1810 | 762 |
mySize := self numVars. |
3130 | 763 |
mySize == 0 ifTrue:[ |
764 |
"/ little optimization here - avaoid creating empty containers |
|
765 |
^ #() |
|
766 |
]. |
|
623 | 767 |
^ (Array new:mySize) replaceFrom:1 to:mySize with:self startingAt:nonVars+1 |
1810 | 768 |
|
769 |
"Modified: 23.10.1996 / 16:20:06 / cg" |
|
1 | 770 |
! ! |
771 |
||
623 | 772 |
!Context methodsFor:'copying'! |
415 | 773 |
|
10943 | 774 |
deepCopyUsing:aDictionary postCopySelector:postCopySelector |
623 | 775 |
"raise an error - deepCopy is not allowed for contexts" |
37 | 776 |
|
10136 | 777 |
|copyOfMe| |
3350
40dc4807a6d4
must catch #deppCopyUsing: instead of #deepCopy.
Claus Gittinger <cg@exept.de>
parents:
3324
diff
changeset
|
778 |
|
10136 | 779 |
copyOfMe := self shallowCopy. |
780 |
copyOfMe setSender:nil. |
|
10943 | 781 |
copyOfMe perform:postCopySelector with:self. |
10136 | 782 |
^ copyOfMe |
783 |
||
784 |
"Created: / 31-03-1998 / 15:51:14 / cg" |
|
785 |
"Modified: / 20-10-2006 / 14:54:12 / User" |
|
1 | 786 |
! ! |
787 |
||
77 | 788 |
!Context methodsFor:'error handling'! |
789 |
||
790 |
invalidReturn:returnValue |
|
791 |
"this message is sent by the VM, when a methods context |
|
792 |
which has already returned is about to return again. |
|
793 |
(i.e. about to execute a return from an already returned |
|
105 | 794 |
method in a block). |
141 | 795 |
We raise a signal here, to allow catching of that situation." |
77 | 796 |
|
406 | 797 |
" |
798 |
in previous versions of ST/X and ST-80, this was no error; |
|
799 |
(instead, a normal blockreturn was performed to the value-sender). |
|
800 |
From a note in comp.lang.smalltalk, I conclude that new ST-80 versions |
|
801 |
now raise an error if this happens. |
|
802 |
Comment out the raise below to get that (old) behavior |
|
803 |
BETTER REWRITE YOUR APPLICATION |
|
804 |
" |
|
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
805 |
"/ old behavior: |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
806 |
"/ ^ returnValue |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
807 |
|
282 | 808 |
"/ new behavior: |
809 |
||
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
810 |
"/ 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
|
811 |
"/ use another error message. |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
812 |
|
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
813 |
(home notNil and:[home sender notNil]) ifTrue:[ |
6002 | 814 |
^ CannotReturnError |
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
815 |
raiseRequestWith:returnValue |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
816 |
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
|
817 |
]. |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
818 |
|
6002 | 819 |
^ CannotReturnError |
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
820 |
raiseRequestWith:returnValue. |
282 | 821 |
|
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
822 |
"Modified: / 2.2.1998 / 15:19:52 / cg" |
406 | 823 |
! |
824 |
||
825 |
invalidReturnOrRestart:returnValue |
|
826 |
"this message is sent by the VM, when a methods context |
|
827 |
which was compiled non-returnable is about to return again. |
|
828 |
We raise a signal here, to allow catching of that situation." |
|
829 |
||
6002 | 830 |
^ CannotReturnError |
831 |
raiseRequestWith:returnValue |
|
832 |
errorString:'method was compiled non-resumable' |
|
360 | 833 |
! |
834 |
||
835 |
invalidReturnOrRestartError:how with:value |
|
836 |
"common error reporter for restart/return errors" |
|
837 |
||
838 |
self canReturn ifTrue:[ |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
839 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
840 |
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
|
841 |
(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
|
842 |
" |
6002 | 843 |
^ CannotReturnError |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
844 |
raiseRequestWith:value |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
845 |
errorString:(how , ' context not on calling chain') |
360 | 846 |
]. |
847 |
" |
|
848 |
tried to return from/restart a context of a method which was compiled |
|
849 |
unrestartable or of a block (which is never restartable) |
|
850 |
" |
|
6002 | 851 |
^ CannotReturnError |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
852 |
raiseRequestWith:value |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
853 |
errorString:(how , ' context cannot be restarted/returned from') |
77 | 854 |
! ! |
855 |
||
6404 | 856 |
!Context methodsFor:'fixups'! |
857 |
||
858 |
fixAllLineNumbers |
|
859 |
%{ |
|
860 |
__PATCHUPCONTEXTS(__thisContext); |
|
6424 | 861 |
__CONTEXTLINENOS(self); |
6404 | 862 |
%} |
863 |
! ! |
|
864 |
||
623 | 865 |
!Context methodsFor:'minidebugger printing'! |
866 |
||
867 |
fullPrint |
|
868 |
"print the receiver, selector and args of the context |
|
869 |
- used only for MiniDebuggers walkback print" |
|
870 |
||
871 |
self receiverPrintString print. ' ' print. selector print. |
|
872 |
self size ~~ 0 ifTrue: [ |
|
3143 | 873 |
' ' print. self argsDisplayString print |
623 | 874 |
]. |
1426 | 875 |
' [' print. self lineNumber print. ']' printCR |
623 | 876 |
|
877 |
" |
|
878 |
thisContext fullPrint |
|
879 |
" |
|
1426 | 880 |
|
881 |
"Modified: 20.5.1996 / 10:27:14 / cg" |
|
623 | 882 |
! |
883 |
||
884 |
fullPrintAll |
|
885 |
"print a full walkback starting at the receiver |
|
886 |
- used only for MiniDebuggers walkback print" |
|
887 |
||
888 |
|context| |
|
889 |
||
890 |
context := self. |
|
891 |
[context notNil] whileTrue: [ |
|
892 |
context fullPrint. |
|
893 |
context := context sender |
|
894 |
] |
|
895 |
||
896 |
" |
|
897 |
thisContext fullPrintAll |
|
898 |
" |
|
2173 | 899 |
! |
900 |
||
4674 | 901 |
fullPrintAllLevels:nOrNil |
902 |
"print a full walkback starting at the receiver, only print n levels |
|
903 |
- used only for MiniDebuggers walkback print" |
|
904 |
||
905 |
|context count| |
|
906 |
||
907 |
count := 0. |
|
908 |
context := self. |
|
909 |
[context notNil] whileTrue: [ |
|
910 |
context fullPrint. |
|
911 |
context := context sender. |
|
5911 | 912 |
nOrNil notNil ifTrue:[ |
4674 | 913 |
(count := count+1) > nOrNil ifTrue:[^self]. |
914 |
] |
|
915 |
] |
|
916 |
||
917 |
" |
|
6648 | 918 |
thisContext fullPrintAllLevels:5 |
4674 | 919 |
" |
920 |
||
921 |
"Created: / 3.9.1999 / 14:02:38 / ps" |
|
11540 | 922 |
! |
923 |
||
11542 | 924 |
printAll |
925 |
"print a full walkback starting at the receiver, only print n levels |
|
926 |
- used only for MiniDebuggers walkback print" |
|
927 |
||
928 |
self printAllLevels:nil |
|
929 |
||
930 |
" |
|
931 |
thisContext printAll |
|
932 |
" |
|
933 |
! |
|
934 |
||
11540 | 935 |
printAllLevels:nOrNil |
936 |
"print a full walkback starting at the receiver, only print n levels |
|
937 |
- used only for MiniDebuggers walkback print" |
|
938 |
||
939 |
|context count| |
|
940 |
||
941 |
count := 0. |
|
942 |
context := self. |
|
943 |
[context notNil] whileTrue: [ |
|
944 |
context printCR. |
|
945 |
context := context sender. |
|
946 |
nOrNil notNil ifTrue:[ |
|
947 |
(count := count+1) > nOrNil ifTrue:[^self]. |
|
948 |
] |
|
949 |
] |
|
950 |
||
951 |
" |
|
952 |
thisContext printAllLevels:5 |
|
953 |
" |
|
623 | 954 |
! ! |
955 |
||
1 | 956 |
!Context methodsFor:'non local control flow'! |
957 |
||
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
958 |
evaluateUnwindActionsUpTo:aContext |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
959 |
"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
|
960 |
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
|
961 |
marked using #markForUnwind. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
962 |
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
|
963 |
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
|
964 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
965 |
|con unwindBlock| |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
966 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
967 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
968 |
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
|
969 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
970 |
con := self findNextUnwindContextOr:aContext. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
971 |
[con notNil and:[con ~~ aContext]] whileTrue:[ |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
972 |
unwindBlock := con receiver unwindHandlerInContext:con. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
973 |
con unmarkForUnwind. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
974 |
unwindBlock value. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
975 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
976 |
con := con findNextUnwindContextOr:aContext. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
977 |
]. |
11340
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
978 |
"/ 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
|
979 |
(con notNil and:[con isMarkedForUnwind]) ifTrue:[ |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
980 |
unwindBlock := con receiver unwindHandlerInContext:con. |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
981 |
con unmarkForUnwind. |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
982 |
unwindBlock value. |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
983 |
]. |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
984 |
^ con |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
985 |
! |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
986 |
|
1 | 987 |
restart |
988 |
"restart the receiver - i.e. the method is evaluated again. |
|
402 | 989 |
if the context to restart already died, trigger an error. |
141 | 990 |
This is a low level helper for unwindAndRestart. |
991 |
||
992 |
NOTICE: |
|
154 | 993 |
NO unwind actions are performed - this is usually not |
994 |
what you want (see Context>>unwindAndRestart). |
|
141 | 995 |
|
996 |
LIMITATION: |
|
154 | 997 |
currently a context can only be restarted by |
928 | 998 |
the owning process - not from outside. |
999 |
Also, the compiler has an option (+optcontext) to create |
|
1000 |
non-restartable contexts (which are faster). |
|
1001 |
If such a context is restarted, a runtime error is raised." |
|
1 | 1002 |
|
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1003 |
%{ /* NOCONTEXT */ |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1004 |
if (__INST(sender_) != nil) { |
3143 | 1005 |
__RESUMECONTEXT__(self, RESTART_VALUE, 0); |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1006 |
} |
360 | 1007 |
%}. |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1008 |
self sender isNil ifTrue:[^ nil]. |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1009 |
|
69 | 1010 |
" |
360 | 1011 |
when we arrive here, something went wrong. |
69 | 1012 |
debugging ... |
1013 |
" |
|
360 | 1014 |
^ self invalidReturnOrRestartError:#restart with:nil |
1 | 1015 |
! |
1016 |
||
623 | 1017 |
resume |
1018 |
"resume execution in this context. I.e. as if the method called |
|
1019 |
last by the receiver did a ^ nil. |
|
1020 |
If the context has already returned, report an error. |
|
1021 |
||
1022 |
NOTICE: |
|
1023 |
NO unwind actions are performed (see Context>>unwind). |
|
1024 |
||
1025 |
LIMITATION: |
|
1026 |
currently a context can only be resumed by |
|
928 | 1027 |
the owning process - not from outside. |
1028 |
Also, the compiler has an option (+optcontext) to create |
|
1029 |
non-resumable contexts (which are faster). |
|
1030 |
If such a context is restarted, a runtime error is raised." |
|
623 | 1031 |
|
1032 |
^ self resume:nil |
|
1033 |
! |
|
1034 |
||
1035 |
resume:value |
|
1036 |
"resume the receiver - as if it got 'value' from whatever |
|
1037 |
it called. This continues execution in the receivers method |
|
1038 |
after the point where it did its last send. |
|
1039 |
If the context has already returned - report an error. |
|
1040 |
||
1041 |
NOTICE: |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1042 |
NO unwind actions are performed (see Context>>unwind:). |
623 | 1043 |
|
1044 |
LIMITATION: |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1045 |
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
|
1046 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1047 |
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
|
1048 |
non-resumable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1049 |
If such a context is restarted, a runtime error is raised." |
623 | 1050 |
|
1668
41db5950f9ea
oops - con local variables are now renamed (last change in stc)
Claus Gittinger <cg@exept.de>
parents:
1492
diff
changeset
|
1051 |
|theContext| |
623 | 1052 |
|
1053 |
" |
|
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
1054 |
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
|
1055 |
(i.e. the one that I have called) and return from it. |
623 | 1056 |
" |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1057 |
|
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
1058 |
%{ |
4557 | 1059 |
OBJ sndr; |
1060 |
||
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
1061 |
theContext = __thisContext; |
4557 | 1062 |
while (theContext != nil) { |
1063 |
sndr = __ContextInstPtr(theContext)->c_sender; |
|
1064 |
if (sndr == self) break; |
|
1065 |
theContext = sndr; |
|
623 | 1066 |
} |
3508 | 1067 |
if (theContext != nil) { |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1068 |
if (__isLazy(theContext)) { |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1069 |
__PATCHUPCONTEXT(theContext); |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1070 |
} |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1071 |
} |
623 | 1072 |
%}. |
1073 |
||
1668
41db5950f9ea
oops - con local variables are now renamed (last change in stc)
Claus Gittinger <cg@exept.de>
parents:
1492
diff
changeset
|
1074 |
theContext isNil ifTrue:[ |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1075 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1076 |
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
|
1077 |
(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
|
1078 |
" |
4557 | 1079 |
^ thisContext invalidReturnOrRestartError:#'resume:' with:value |
623 | 1080 |
]. |
1668
41db5950f9ea
oops - con local variables are now renamed (last change in stc)
Claus Gittinger <cg@exept.de>
parents:
1492
diff
changeset
|
1081 |
^ theContext return:value |
623 | 1082 |
! |
1083 |
||
4557 | 1084 |
resumeIgnoringErrors:value |
1085 |
"resume the receiver - as if it got 'value' from whatever |
|
1086 |
it called. This continues execution in the receivers method |
|
1087 |
after the point where it did its last send. |
|
1088 |
If the context has already returned - simply return. |
|
1089 |
||
1090 |
NOTICE: |
|
1091 |
NO unwind actions are performed (see Context>>unwind:). |
|
1092 |
||
1093 |
LIMITATION: |
|
1094 |
currently a context can only be resumed by |
|
1095 |
the owning process - not from outside. |
|
1096 |
Also, the compiler has an option (+optcontext) to create |
|
1097 |
non-resumable contexts (which are faster). |
|
1098 |
If such a context is restarted, a runtime error is raised." |
|
1099 |
||
1100 |
" |
|
1101 |
starting with this context, find the one below |
|
1102 |
(i.e. the one that I have called) and return from it. |
|
1103 |
" |
|
1104 |
||
1105 |
%{ |
|
1106 |
OBJ theContext, sndr; |
|
1107 |
||
1108 |
theContext = __thisContext; |
|
1109 |
while (theContext != nil) { |
|
1110 |
sndr = __ContextInstPtr(theContext)->c_sender; |
|
1111 |
if (sndr == self) break; |
|
1112 |
theContext = sndr; |
|
1113 |
} |
|
1114 |
if (theContext != nil) { |
|
1115 |
if (__ContextInstPtr(theContext)->c_sender) { |
|
4635 | 1116 |
if (!((INT)(__ContextInstPtr(theContext)->c_flags) & __MASKSMALLINT(__CANNOT_RETURN))) { |
1117 |
__RESUMECONTEXT__(theContext, value, 0); |
|
1118 |
} |
|
4557 | 1119 |
} |
1120 |
} |
|
1121 |
%}. |
|
1122 |
||
1123 |
"/ no error reporting |
|
1124 |
! |
|
1125 |
||
1126 |
resumeOnErrorProceed:value |
|
1127 |
"resume the receiver - as if it got 'value' from whatever |
|
1128 |
it called. This continues execution in the receivers method |
|
1129 |
after the point where it did its last send. |
|
1130 |
If the context has already returned - simply return. |
|
1131 |
||
1132 |
NOTICE: |
|
1133 |
NO unwind actions are performed (see Context>>unwind:). |
|
1134 |
||
1135 |
LIMITATION: |
|
1136 |
currently a context can only be resumed by |
|
1137 |
the owning process - not from outside. |
|
1138 |
Also, the compiler has an option (+optcontext) to create |
|
1139 |
non-resumable contexts (which are faster). |
|
1140 |
If such a context is restarted, a runtime error is raised." |
|
1141 |
||
1142 |
" |
|
1143 |
starting with this context, find the one below |
|
1144 |
(i.e. the one that I have called) and return from it. |
|
1145 |
" |
|
1146 |
||
1147 |
%{ |
|
1148 |
OBJ theContext, sndr; |
|
1149 |
||
1150 |
theContext = __thisContext; |
|
1151 |
while (theContext != nil) { |
|
1152 |
sndr = __ContextInstPtr(theContext)->c_sender; |
|
1153 |
if (sndr == self) break; |
|
1154 |
theContext = sndr; |
|
1155 |
} |
|
1156 |
if (theContext != nil) { |
|
1157 |
if (__ContextInstPtr(theContext)->c_sender) { |
|
1158 |
__RESUMECONTEXT__(theContext, value, 0); |
|
1159 |
} |
|
1160 |
} |
|
1161 |
%}. |
|
1162 |
||
1163 |
"/ no error reporting |
|
1164 |
! |
|
1165 |
||
69 | 1166 |
return |
141 | 1167 |
"return from this context with nil. I.e. as if it did a ^ nil. |
1168 |
NOTICE: |
|
154 | 1169 |
NO unwind actions are performed - this is usually not |
1170 |
what you want (See Context>>unwind). |
|
1171 |
This is a low level method - a helper for unwind. |
|
1 | 1172 |
|
141 | 1173 |
LIMITATION: |
154 | 1174 |
currently a context can only be returned by |
928 | 1175 |
the owning process - not from outside. |
1176 |
Also, the compiler has an option (+optcontext) to create |
|
1177 |
non-returnable contexts (which are faster). |
|
1178 |
If such a context is restarted, a runtime error is raised." |
|
141 | 1179 |
|
1180 |
^ self return:nil |
|
1 | 1181 |
! |
1182 |
||
69 | 1183 |
return:value |
1184 |
"return from this context as if it did a '^ value'. |
|
141 | 1185 |
NOTICE: |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1186 |
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
|
1187 |
what you want (See Context>>unwind:). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1188 |
This is a low level method - a helper for unwind. |
141 | 1189 |
|
1190 |
LIMITATION: |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1191 |
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
|
1192 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1193 |
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
|
1194 |
non-returnable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1195 |
If such a context is restarted, a runtime error is raised." |
1 | 1196 |
|
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1197 |
%{ /* NOCONTEXT */ |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1198 |
if (__INST(sender_) != nil) { |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1199 |
__RESUMECONTEXT__(self, value, 0); |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1200 |
} |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1201 |
%}. |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1202 |
self sender isNil ifTrue:[^ nil]. |
1 | 1203 |
|
69 | 1204 |
" |
360 | 1205 |
when we arrive here, something went wrong. |
69 | 1206 |
debugging ... |
1207 |
" |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1208 |
^ self invalidReturnOrRestartError:#'return' with:value |
1 | 1209 |
! |
1210 |
||
328 | 1211 |
returnDoing:aBlock |
1212 |
"return from this context as if it did a '^ aBlock value'. |
|
1213 |
The block is evaluated as if called by the receiver context; |
|
1214 |
NOT the true executing context. |
|
1215 |
NOTICE: |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1216 |
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
|
1217 |
what you want (See Context>>unwindThenDo:). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1218 |
This is a low level method - a helper for unwind. |
328 | 1219 |
|
1220 |
LIMITATION: |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1221 |
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
|
1222 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1223 |
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
|
1224 |
non-returnable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1225 |
If such a context is restarted, a runtime error is raised." |
328 | 1226 |
|
4557 | 1227 |
%{ |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1228 |
if (__INST(sender_) != nil) { |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1229 |
__RESUMECONTEXT__(self, aBlock, 2); |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1230 |
} |
360 | 1231 |
%}. |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1232 |
self sender isNil ifTrue:[^ nil]. |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1233 |
|
328 | 1234 |
" |
360 | 1235 |
when we arrive here, something went wrong. |
328 | 1236 |
debugging ... |
1237 |
" |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1238 |
^ self invalidReturnOrRestartError:#'returnDoing' with:aBlock |
328 | 1239 |
! |
1240 |
||
1 | 1241 |
unwind |
69 | 1242 |
"return nil from the receiver - i.e. simulate a '^ nil'. |
11337 | 1243 |
If the context has already returned, report an error. |
1 | 1244 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
69 | 1245 |
and Block>>valueOnUnwindDo: on the way. |
1 | 1246 |
|
141 | 1247 |
LIMITATION: |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1248 |
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
|
1249 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1250 |
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
|
1251 |
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
|
1252 |
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
|
1253 |
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
|
1254 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1255 |
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
|
1256 |
non-returnable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1257 |
If such a context is restarted, a runtime error is raised." |
141 | 1258 |
|
1259 |
^ self unwind:nil |
|
1 | 1260 |
! |
1261 |
||
1262 |
unwind:value |
|
69 | 1263 |
"return value from the receiver - i.e. simulate a '^ value'. |
360 | 1264 |
If the context has already returned , report an error. |
1 | 1265 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
69 | 1266 |
and Block>>valueOnUnwindDo: on the way. |
141 | 1267 |
|
1268 |
LIMITATION: |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1269 |
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
|
1270 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1271 |
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
|
1272 |
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
|
1273 |
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
|
1274 |
context, by giving it an interrupt action - this does make sense. |
1 | 1275 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1276 |
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
|
1277 |
non-returnable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1278 |
If such a context is restarted, a runtime error is raised." |
1 | 1279 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1280 |
|con| |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1281 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1282 |
self senderIsNil ifFalse:[ |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1283 |
con := thisContext evaluateUnwindActionsUpTo:self. |
141 | 1284 |
]. |
1 | 1285 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1286 |
"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
|
1287 |
(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
|
1288 |
should we check for this situation first and NOT evaluate |
141 | 1289 |
the unwind actions in this case ?) |
1290 |
" |
|
69 | 1291 |
con isNil ifTrue:[ |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1292 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1293 |
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
|
1294 |
(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
|
1295 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1296 |
^ self invalidReturnOrRestartError:#'unwind:' with:value |
69 | 1297 |
]. |
141 | 1298 |
" |
1299 |
now, that all unwind-actions are done, I can use the |
|
1300 |
low-level return ... |
|
1301 |
" |
|
1302 |
^ self return:value |
|
1303 |
! |
|
1304 |
||
1305 |
unwindAndRestart |
|
1306 |
"restart the receiver - i.e. the method is evaluated again. |
|
402 | 1307 |
if the context to restart already died report an error. |
141 | 1308 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
1309 |
and Block>>valueOnUnwindDo: before restarting. |
|
1310 |
||
1311 |
LIMITATION: |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1312 |
a context can only be restarted by |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1313 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1314 |
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
|
1315 |
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
|
1316 |
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
|
1317 |
context, by giving it an interrupt action - this does make sense. |
141 | 1318 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1319 |
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
|
1320 |
non-restartable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1321 |
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
|
1322 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1323 |
|con| |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1324 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1325 |
self senderIsNil ifFalse:[ |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1326 |
con := thisContext evaluateUnwindActionsUpTo:self. |
141 | 1327 |
]. |
1328 |
||
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1329 |
"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
|
1330 |
(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
|
1331 |
should we check for this situation first and NOT evaluate |
141 | 1332 |
the unwind actions in this case ?) |
1333 |
" |
|
1334 |
con isNil ifTrue:[ |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1335 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1336 |
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
|
1337 |
(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
|
1338 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1339 |
^ self invalidReturnOrRestartError:#'unwindAndRestart:' with:nil |
141 | 1340 |
]. |
1341 |
" |
|
1342 |
now, that all unwind-actions are done, I can use the |
|
1343 |
low-level restart ... |
|
1344 |
" |
|
1345 |
^ self restart |
|
328 | 1346 |
! |
1347 |
||
4485 | 1348 |
unwindAndResume:value |
1349 |
"resume execution in the the receiver - i.e. simulate a '^ value' |
|
1350 |
from whatever it called last. |
|
1351 |
If the context has already returned , report an error. |
|
1352 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
|
1353 |
and Block>>valueOnUnwindDo: on the way. |
|
1354 |
||
1355 |
LIMITATION: |
|
1356 |
currently a context can only be unwound by |
|
1357 |
the owning process - not from outside. |
|
1358 |
i.e. it is not possible for one thread to unwind |
|
1359 |
another threads context - which does not make sense anyway. |
|
1360 |
However, you can force another thread to do this in its own process |
|
1361 |
context, by giving it an interrupt action - this does make sense. |
|
1362 |
||
1363 |
Also, the compiler has an option (+optcontext) to create |
|
1364 |
non-returnable contexts (which are faster). |
|
1365 |
If such a context is restarted, a runtime error is raised." |
|
1366 |
||
1367 |
|con| |
|
1368 |
||
1369 |
self senderIsNil ifFalse:[ |
|
1370 |
con := thisContext evaluateUnwindActionsUpTo:self. |
|
1371 |
]. |
|
1372 |
||
1373 |
"oops, if nil, I am not on the calling chain; |
|
1374 |
(bad bad, unwind action have already been performed. |
|
1375 |
should we check for this situation first and NOT evaluate |
|
1376 |
the unwind actions in this case ?) |
|
1377 |
" |
|
1378 |
con isNil ifTrue:[ |
|
1379 |
" |
|
1380 |
tried to return to a context which is already dead |
|
1381 |
(i.e. the method/block has already executed a return) |
|
1382 |
" |
|
1383 |
^ self invalidReturnOrRestartError:#'unwindAndResume:' with:value |
|
1384 |
]. |
|
1385 |
" |
|
1386 |
now, that all unwind-actions are done, I can use the |
|
1387 |
low-level resume ... |
|
1388 |
" |
|
1389 |
^ self resume:value |
|
1390 |
! |
|
1391 |
||
328 | 1392 |
unwindThenDo:aBlock |
1393 |
"return the value of aBlock from the receiver - i.e. simulate a '^ aBlock value'. |
|
360 | 1394 |
If the context has already returned , report an error. |
328 | 1395 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
1396 |
and Block>>valueOnUnwindDo: on the way. |
|
1397 |
The block is evaluated AFTER all unwind actions are performed |
|
1398 |
(i.e. the blocks sender will be the receiving context, not the |
|
402 | 1399 |
currently executing context) |
328 | 1400 |
|
1401 |
LIMITATION: |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1402 |
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
|
1403 |
the owning process - not from outside |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1404 |
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
|
1405 |
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
|
1406 |
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
|
1407 |
context, by giving it an interrupt action - this does make sense. |
328 | 1408 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1409 |
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
|
1410 |
non-returnable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1411 |
If such a context is restarted, a runtime error is raised." |
328 | 1412 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1413 |
|con| |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1414 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1415 |
self senderIsNil ifFalse:[ |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1416 |
con := thisContext evaluateUnwindActionsUpTo:self. |
328 | 1417 |
]. |
1418 |
||
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1419 |
"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
|
1420 |
(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
|
1421 |
should we check for this situation first and NOT evaluate |
328 | 1422 |
the unwind actions in this case ?) |
1423 |
" |
|
1424 |
con isNil ifTrue:[ |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1425 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1426 |
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
|
1427 |
(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
|
1428 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1429 |
^ self invalidReturnOrRestartError:#'unwindThenDo:' with:aBlock |
328 | 1430 |
]. |
1431 |
" |
|
1432 |
now, that all unwind-actions are done, I can use the |
|
1433 |
low-level return ... |
|
1434 |
" |
|
1435 |
^ self returnDoing:aBlock |
|
1 | 1436 |
! ! |
623 | 1437 |
|
1438 |
!Context methodsFor:'printing & storing'! |
|
1439 |
||
1070
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1440 |
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
|
1441 |
|
11539 | 1442 |
|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
|
1443 |
%{ |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1444 |
/* |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1445 |
* 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
|
1446 |
* 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
|
1447 |
* which may lead to sends to free objects. In normal operation, this 'cannot' happen. |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1448 |
*/ |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1449 |
if (__isNonNilObject(someObject) && (__qClass(someObject)==nil)) { |
11539 | 1450 |
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
|
1451 |
} |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1452 |
%}. |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1453 |
name notNil ifTrue:[^ name]. |
11539 | 1454 |
s := someObject displayString. |
1455 |
s isNil ifTrue:[ |
|
1456 |
^ '**************** nil displayString of ',(someObject class name ? '??') |
|
1457 |
]. |
|
1458 |
^ 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
|
1459 |
! |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1460 |
|
623 | 1461 |
argsDisplayString |
1462 |
|fullString n "{ Class: SmallInteger }" | |
|
1463 |
||
1464 |
fullString := ''. |
|
1465 |
n := self numArgs. |
|
1466 |
1 to:n do:[:index | |
|
1070
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1467 |
fullString := fullString , ' ' , (self argStringFor:(self at:index)) |
623 | 1468 |
]. |
1469 |
^ fullString |
|
1470 |
! |
|
1471 |
||
6648 | 1472 |
displayArgsOn:aStream |
1473 |
| n "{ Class: SmallInteger }" | |
|
1474 |
||
1475 |
n := self numArgs. |
|
1476 |
1 to:n do:[:index | |
|
1477 |
aStream nextPutAll:(self argStringFor:(self at:index)). |
|
8578 | 1478 |
aStream nextPutAll:' '. |
6648 | 1479 |
]. |
1480 |
! |
|
1481 |
||
623 | 1482 |
displayString |
1483 |
"return a string describing the context - for display in Inspector" |
|
1484 |
||
1485 |
^ self class name , '(' , self printString , ')' |
|
1486 |
! |
|
1487 |
||
6648 | 1488 |
fullPrintAllOn:aStream |
1489 |
"print a full walkback starting at the receiver" |
|
1490 |
||
1491 |
|context| |
|
1492 |
||
1493 |
context := self. |
|
1494 |
[context notNil] whileTrue: [ |
|
1495 |
context fullPrintOn:aStream. |
|
1496 |
aStream cr. |
|
1497 |
context := context sender |
|
1498 |
] |
|
1499 |
||
1500 |
" |
|
1501 |
thisContext fullPrintAllOn:Transcript |
|
1502 |
" |
|
1503 |
||
1504 |
"Created: 15.1.1997 / 18:09:05 / cg" |
|
1505 |
! |
|
1506 |
||
1507 |
fullPrintOn:aStream |
|
1508 |
"print the receiver, selector and args of the context" |
|
1509 |
||
8578 | 1510 |
self receiverPrintString printOn:aStream. |
11306
c0c5c6a7054a
Print methods: Show message sends as Class >> #selector (with the #),
Stefan Vogel <sv@exept.de>
parents:
10943
diff
changeset
|
1511 |
aStream nextPutAll:' >> '. |
11311 | 1512 |
self selector printOn:aStream. "show as string (as symbol looks too ugly in browser ...)" |
1513 |
"/ self selector storeOn:aStream. "show as symbol" |
|
8578 | 1514 |
|
6648 | 1515 |
self size ~~ 0 ifTrue: [ |
8578 | 1516 |
aStream nextPutAll:' '. |
6648 | 1517 |
self displayArgsOn:aStream |
1518 |
]. |
|
10804 | 1519 |
aStream nextPutAll:' {'. |
1520 |
self identityHash printOn:aStream. |
|
1521 |
aStream nextPutAll:'}'. |
|
1522 |
||
6648 | 1523 |
aStream nextPutAll:' ['. |
1524 |
self lineNumber printOn:aStream. |
|
8578 | 1525 |
aStream nextPutAll:']'. |
6648 | 1526 |
|
1527 |
" |
|
1528 |
thisContext fullPrintOn:Transcript |
|
1529 |
" |
|
1530 |
||
1531 |
"Modified: 20.5.1996 / 10:27:14 / cg" |
|
1532 |
"Created: 15.1.1997 / 18:09:06 / cg" |
|
1533 |
! |
|
1534 |
||
623 | 1535 |
fullPrintString |
1536 |
"return a string describing the context - this includes the linenumber, |
|
1537 |
receiver printString and argument printString" |
|
1538 |
||
1539 |
|s| |
|
1540 |
||
1541 |
s := WriteStream on:String new. |
|
6648 | 1542 |
self fullPrintOn:s. |
623 | 1543 |
^ s contents |
1544 |
||
1545 |
" |
|
1546 |
thisContext fullPrintString |
|
1547 |
" |
|
1548 |
! |
|
1549 |
||
1550 |
methodPrintString |
|
1551 |
"return a string describing the contexts method as 'implementorClass>>selector'" |
|
1552 |
||
1853
09cd1e8df9a2
use new Method>>who interface
Claus Gittinger <cg@exept.de>
parents:
1810
diff
changeset
|
1553 |
|mthd who| |
623 | 1554 |
|
1555 |
mthd := self method. |
|
1556 |
mthd notNil ifTrue:[ |
|
11306
c0c5c6a7054a
Print methods: Show message sends as Class >> #selector (with the #),
Stefan Vogel <sv@exept.de>
parents:
10943
diff
changeset
|
1557 |
who := mthd who. |
c0c5c6a7054a
Print methods: Show message sends as Class >> #selector (with the #),
Stefan Vogel <sv@exept.de>
parents:
10943
diff
changeset
|
1558 |
who notNil ifTrue:[ |
c0c5c6a7054a
Print methods: Show message sends as Class >> #selector (with the #),
Stefan Vogel <sv@exept.de>
parents:
10943
diff
changeset
|
1559 |
^ 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
|
1560 |
] |
623 | 1561 |
]. |
1562 |
^ mthd displayString. |
|
1563 |
||
1564 |
" |
|
1565 |
thisContext methodPrintString |
|
1566 |
thisContext sender methodPrintString |
|
1567 |
" |
|
1853
09cd1e8df9a2
use new Method>>who interface
Claus Gittinger <cg@exept.de>
parents:
1810
diff
changeset
|
1568 |
|
09cd1e8df9a2
use new Method>>who interface
Claus Gittinger <cg@exept.de>
parents:
1810
diff
changeset
|
1569 |
"Modified: 1.11.1996 / 16:21:49 / cg" |
623 | 1570 |
! |
1571 |
||
1572 |
printOn:aStream |
|
1573 |
"append a printed description of the receiver onto aStream" |
|
1574 |
||
1575 |
aStream nextPutAll:(self receiverPrintString). |
|
10549 | 1576 |
"/ aStream nextPutAll:' '. |
1577 |
aStream nextPutAll:' >> '. |
|
1578 |
||
1579 |
aStream bold. |
|
11310
830490e3ac43
dont use storeString of selector in #printOn:
Claus Gittinger <cg@exept.de>
parents:
11306
diff
changeset
|
1580 |
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
|
1581 |
"/ self selector storeOn:aStream. "show as symbol" |
10549 | 1582 |
aStream normal. |
4393 | 1583 |
aStream space. |
1584 |
aStream nextPutAll:' ['; nextPutAll:self lineNumber printString; nextPutAll:']' . |
|
1585 |
||
10549 | 1586 |
"Modified: / 21-05-2007 / 13:29:21 / cg" |
623 | 1587 |
! |
1588 |
||
1589 |
receiverPrintString |
|
1590 |
"return a string describing the receiver of the context" |
|
1591 |
||
1592 |
|receiverClass receiverClassName newString implementorClass| |
|
1593 |
||
10549 | 1594 |
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
|
1595 |
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
|
1596 |
|
623 | 1597 |
receiverClass := receiver class. |
3923 | 1598 |
receiverClass isJavaClass ifTrue:[ |
1599 |
receiverClassName := receiverClass displayString |
|
1600 |
] ifFalse:[ |
|
1601 |
(receiverClass isBehavior |
|
1602 |
and:[receiverClass isMeta |
|
1603 |
and:[receiverClass soleInstance isJavaClass]]) ifTrue:[ |
|
1604 |
"/ receiverClassName := receiverClass soleInstance fullName. |
|
1605 |
receiverClassName := receiverClass name. |
|
1606 |
] ifFalse:[ |
|
1607 |
receiverClassName := receiverClass name. |
|
11311 | 1608 |
]. |
1609 |
[ |
|
1610 |
receiverClassName := receiverClass name. |
|
1611 |
]. []. |
|
3923 | 1612 |
]. |
6197 | 1613 |
(receiverClass == SmallInteger |
1614 |
or:[receiverClass == Float]) ifTrue:[ |
|
3923 | 1615 |
newString := '(' , receiver printString , ') ' , receiverClassName |
623 | 1616 |
] ifFalse:[ |
3923 | 1617 |
newString := receiverClassName |
623 | 1618 |
]. |
1619 |
||
1620 |
selector notNil ifTrue:[ |
|
1621 |
"/ implementorClass := self searchClass whichClassIncludesSelector:selector. |
|
1622 |
||
3923 | 1623 |
" |
1624 |
kludge to avoid slow search for containing class |
|
1625 |
" |
|
1626 |
(selector ~~ #doIt and:[selector ~~ #doIt:]) ifTrue:[ |
|
1627 |
implementorClass := self methodClass. |
|
1628 |
]. |
|
1629 |
||
1630 |
implementorClass notNil ifTrue: [ |
|
1631 |
(implementorClass ~~ receiverClass) ifTrue: [ |
|
10549 | 1632 |
"/ newString := newString , '>>>', implementorClass name printString |
1633 |
newString := newString,'(',implementorClass name printString,')' |
|
3923 | 1634 |
] |
1635 |
] ifFalse:[ |
|
1636 |
self searchClass ~~ receiverClass ifTrue:[ |
|
10549 | 1637 |
"/ newString := newString , '>>>' , self searchClass name |
1638 |
newString := newString,'(',self searchClass name,')' |
|
3923 | 1639 |
]. |
1640 |
" |
|
1641 |
kludge for doIt - these unbound methods are not |
|
1642 |
found in the classes methodDictionary |
|
1643 |
" |
|
1644 |
(selector ~~ #doIt and:[selector ~~ #doIt:]) ifTrue:[ |
|
10549 | 1645 |
"/ newString := newString , '>>>**NONE**' |
1646 |
newString := newString , '(**NONE**)' |
|
3923 | 1647 |
] |
1648 |
] |
|
623 | 1649 |
]. |
1650 |
||
1651 |
^ newString |
|
6197 | 1652 |
|
10549 | 1653 |
"Modified: / 21-05-2007 / 13:21:24 / cg" |
1654 |
! |
|
1655 |
||
1656 |
saveReceiverClassName |
|
1657 |
"return the receivers class-name string or nil, if the receiver is invalid. |
|
1658 |
This cares for invalid (free) objects which may appear with bad primitive code, |
|
1659 |
and prevents a crash in such a case." |
|
1660 |
||
1661 |
|receiverClassName| |
|
1662 |
||
1663 |
%{ |
|
1664 |
/* |
|
1665 |
* special handling for (invalid) free objects. |
|
1666 |
* these only appear if some primitiveCode does not correctly use SEND macros, |
|
1667 |
* which may lead to sends to free objects. In normal operation, this 'cannot' happen. |
|
1668 |
*/ |
|
1669 |
if (__isNonNilObject(__INST(receiver)) && (__qClass(__INST(receiver))==nil)) { |
|
1670 |
receiverClassName = __MKSTRING("FreeObject"); |
|
1671 |
} |
|
1672 |
%}. |
|
1673 |
^ receiverClassName |
|
1674 |
||
1675 |
"Created: / 21-05-2007 / 13:19:37 / cg" |
|
623 | 1676 |
! ! |
1677 |
||
7257 | 1678 |
!Context methodsFor:'private-accessing'! |
623 | 1679 |
|
11340
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1680 |
isMarkedForUnwind |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1681 |
"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
|
1682 |
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
|
1683 |
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
|
1684 |
|
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1685 |
%{ /* NOCONTEXT */ |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1686 |
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
|
1687 |
%} |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1688 |
" |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1689 |
thisContext isMarkedForUnwind |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1690 |
" |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1691 |
! |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1692 |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1693 |
markForHandle |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1694 |
"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
|
1695 |
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
|
1696 |
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
|
1697 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1698 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1699 |
__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
|
1700 |
%} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1701 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1702 |
"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
|
1703 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1704 |
|
753
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1705 |
markForInterrupt |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1706 |
"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
|
1707 |
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
|
1708 |
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
|
1709 |
|
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1710 |
%{ /* NOCONTEXT */ |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1711 |
__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
|
1712 |
%} |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1713 |
! |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1714 |
|
1727 | 1715 |
markForInterruptOnUnwind |
1716 |
"set the interrupt-on-unwind flag in the receiver. |
|
1717 |
The VM will generate a stepInterrupt, when this context returns or |
|
1718 |
is unwound. This is used by the debugger for faster single-stepping; |
|
1719 |
- a highly internal mechanism and not for public use." |
|
1720 |
||
1721 |
%{ /* NOCONTEXT */ |
|
3508 | 1722 |
__INST(flags) = (OBJ)((INT)__INST(flags) | __MASKSMALLINT(__IRQ_ON_UNWIND)); |
1727 | 1723 |
%} |
1724 |
! |
|
1725 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1726 |
markForRaise |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1727 |
"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
|
1728 |
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
|
1729 |
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
|
1730 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1731 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1732 |
__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
|
1733 |
%} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1734 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1735 |
"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
|
1736 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1737 |
|
623 | 1738 |
markForUnwind |
749 | 1739 |
"set the mark for unwind flag in the receiver. |
1740 |
The VM needs this to know that some special action is to be performed with |
|
1741 |
this context - a highly internal mechanism and not for public use." |
|
1742 |
||
623 | 1743 |
%{ /* NOCONTEXT */ |
1133 | 1744 |
__INST(flags) = (OBJ)((INT)__INST(flags) | __MASKSMALLINT(__UNWIND_MARK)); |
623 | 1745 |
%} |
749 | 1746 |
|
1747 |
"Modified: 13.12.1995 / 19:05:22 / cg" |
|
623 | 1748 |
! |
1749 |
||
5780 | 1750 |
setHome:aContext |
1751 |
"set the homeContext. |
|
1752 |
DANGER: this is for experimental, internal use only (byteCode interpreters)" |
|
1753 |
||
1754 |
home := aContext. |
|
1755 |
! |
|
1756 |
||
1757 |
setSender:aContext |
|
1758 |
"set the sender of the context. |
|
1759 |
DANGER: this is for experimental, internal use only (byteCode interpreters)" |
|
1760 |
||
1761 |
%{ /* NOCONTEXT */ |
|
1762 |
__INST(sender_) = aContext; |
|
1763 |
%} |
|
1764 |
! |
|
1765 |
||
623 | 1766 |
unmarkForUnwind |
749 | 1767 |
"clear the mark for unwind flag in the receiver. |
1768 |
The VM needs this to know that some special action is to be performed with |
|
1769 |
this context - a highly internal mechanism and not for public use." |
|
1770 |
||
623 | 1771 |
%{ /* NOCONTEXT */ |
1133 | 1772 |
__INST(flags) = (OBJ)((INT)__INST(flags) & ~__MASKSMALLINT(__UNWIND_MARK)); |
623 | 1773 |
%} |
1774 |
! ! |
|
1775 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1776 |
!Context methodsFor:'searching'! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1777 |
|
8284 | 1778 |
findExceptional |
1779 |
"walk along the sender chain (starting with the sender), |
|
1780 |
for a context which is marked as handle or raise context. |
|
1781 |
This non-standard interface is only to be used by exception" |
|
1782 |
||
1783 |
"/ this could have been (actually: was) implemented as: |
|
1784 |
"/ |
|
1785 |
"/ |con| |
|
1786 |
"/ |
|
1787 |
"/ con := self. |
|
1788 |
"/ [con notNil] whileTrue:[ |
|
1789 |
"/ [con isHandleContext] ifTrue:[^con]. |
|
1790 |
"/ [con isRaiseContext] ifTrue:[^con]. |
|
1791 |
"/ con := con sender. |
|
1792 |
"/ ]. |
|
1793 |
"/ ^ nil |
|
1794 |
"/ |
|
1795 |
"/ and the code below does exactly this (somewhat faster, though). |
|
1796 |
"/ |
|
1797 |
"/ (it avoids referencing all intermediate contexts, which would mark them special, |
|
1798 |
"/ although they aren't really - this is expert knowledge, no need to understand that ...) |
|
1799 |
||
1800 |
%{ /* NOCONTEXT */ |
|
1801 |
||
1802 |
OBJ theContext; |
|
1803 |
||
1804 |
theContext = self; |
|
1805 |
while (__isNonNilObject(theContext)) { |
|
1806 |
if ((INT)(__ContextInstPtr(theContext)->c_flags) & __MASKSMALLINT(__HANDLE_MARK|__RAISE_MARK)) { |
|
1807 |
if (__isLazy(theContext)) { |
|
1808 |
__PATCHUPCONTEXT(theContext); |
|
1809 |
} |
|
1810 |
||
1811 |
if (! __isNonLIFO(theContext)) { |
|
1812 |
/* |
|
1813 |
* to be prepared for the worst situation |
|
1814 |
* (the sender is not stored, so the trap won't catch it) |
|
1815 |
* make the writeBarrier trigger manually. |
|
1816 |
* We'll see, if this is really required. |
|
1817 |
*/ |
|
1818 |
theContext->o_space |= CATCHMARK; |
|
1819 |
#if 0 |
|
1820 |
_markNonLIFO(theContext); |
|
1821 |
#endif |
|
1822 |
} |
|
1823 |
RETURN (theContext); |
|
1824 |
} |
|
1825 |
theContext = __ContextInstPtr(theContext)->c_sender; |
|
1826 |
} |
|
1827 |
%}. |
|
1828 |
^ nil |
|
1829 |
! |
|
1830 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1831 |
findNextContextWithSelector:selector1 or:selector2 or:selector3 |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1832 |
"walk along the sender chain (starting with the sender), |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1833 |
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
|
1834 |
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
|
1835 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1836 |
"/ 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
|
1837 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1838 |
"/ |con| |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1839 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1840 |
"/ con := self sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1841 |
"/ [con notNil] whileTrue:[ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1842 |
"/ 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
|
1843 |
"/ con := con sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1844 |
"/ ]. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1845 |
"/ ^ nil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1846 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1847 |
"/ 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
|
1848 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1849 |
"/ (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
|
1850 |
"/ 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
|
1851 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1852 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1853 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1854 |
OBJ theContext; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1855 |
OBJ sel; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1856 |
OBJ __FETCHSELECTOR(); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1857 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1858 |
theContext = __INST(sender_); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1859 |
while (__isNonNilObject(theContext)) { |
5422 | 1860 |
if (__isLazy(theContext)) { |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1861 |
#ifdef TRADITIONAL_STACK_FRAME |
5422 | 1862 |
sel = __FETCHSELECTOR(theContext); |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1863 |
#else |
5422 | 1864 |
/* mhmh - not really needed */ |
1865 |
__PATCHUPCONTEXT(theContext); |
|
1866 |
sel = __ContextInstPtr(theContext)->c_selector; |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1867 |
#endif |
5422 | 1868 |
} else { |
1869 |
sel = __ContextInstPtr(theContext)->c_selector; |
|
1870 |
} |
|
1871 |
||
1872 |
if ((sel == selector1) |
|
1873 |
|| ((selector2 != nil) && (sel == selector2)) |
|
1874 |
|| ((selector3 != nil) && (sel == selector3))) { |
|
1875 |
if (__isLazy(theContext)) { |
|
1876 |
__PATCHUPCONTEXT(theContext); |
|
1877 |
} |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1878 |
|
5422 | 1879 |
if (! __isNonLIFO(theContext)) { |
1880 |
/* |
|
1881 |
* to be prepared for the worst situation |
|
1882 |
* (the sender is not stored, so the trap wont catch it) |
|
1883 |
* make the writeBarrier trigger manually. |
|
1884 |
* We'll see, if this is really required. |
|
1885 |
*/ |
|
1886 |
theContext->o_space |= CATCHMARK; |
|
1887 |
_markNonLIFO(theContext); |
|
1888 |
} |
|
1889 |
RETURN (theContext); |
|
1890 |
} |
|
1891 |
theContext = __ContextInstPtr(theContext)->c_sender; |
|
1892 |
} |
|
1893 |
RETURN (nil); |
|
1894 |
%}. |
|
1895 |
" |
|
1896 |
|con sel| |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1897 |
|
5422 | 1898 |
con := self sender. |
1899 |
[con notNil] whileTrue:[ |
|
1900 |
sel := con selector. |
|
1901 |
sel == selector1 ifTrue:[^ con]. |
|
1902 |
(selector2 notNil and:[sel == selector2]) ifTrue:[^ con]. |
|
1903 |
(selector3 notNil and:[sel == selector3]) ifTrue:[^ con]. |
|
1904 |
con := con sender. |
|
1905 |
]. |
|
1906 |
^ nil |
|
1907 |
" |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1908 |
! |
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 |
findNextUnwindContextOr:aContext |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1911 |
"walk along the sender chain (starting at the sender), |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1912 |
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
|
1913 |
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
|
1914 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1915 |
"/ 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
|
1916 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1917 |
"/ |con| |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1918 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1919 |
"/ con := self sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1920 |
"/ [con notNil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1921 |
"/ and:[con ~~ aContext |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1922 |
"/ 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
|
1923 |
"/ ^ con |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1924 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1925 |
"/ 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
|
1926 |
"/ (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
|
1927 |
"/ 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
|
1928 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1929 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1930 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1931 |
OBJ theContext; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1932 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1933 |
if (self == aContext) { |
4485 | 1934 |
RETURN (self); |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1935 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1936 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1937 |
theContext = __INST(sender_); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1938 |
while (__isNonNilObject(theContext)) { |
4485 | 1939 |
if ((theContext == aContext) |
1940 |
|| ((INT)(__ContextInstPtr(theContext)->c_flags) & __MASKSMALLINT(__UNWIND_MARK))) { |
|
1941 |
if (__isLazy(theContext)) { |
|
1942 |
__PATCHUPCONTEXT(theContext); |
|
1943 |
} |
|
1944 |
if (! __isNonLIFO(theContext)) { |
|
1945 |
/* |
|
1946 |
* to be prepared for the worst situation |
|
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 |
#if 0 |
|
1953 |
_markNonLIFO(theContext); |
|
1954 |
#endif |
|
1955 |
} |
|
1956 |
RETURN (theContext); |
|
1957 |
} |
|
1958 |
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
|
1959 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1960 |
%}. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1961 |
^ nil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1962 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1963 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1964 |
findSpecialHandle:findHandleContext raise:findRaiseContext |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1965 |
"walk along the sender chain (starting with the sender), |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1966 |
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
|
1967 |
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
|
1968 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1969 |
"/ 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
|
1970 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1971 |
"/ |con| |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1972 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1973 |
"/ con := self sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1974 |
"/ [con notNil] whileTrue:[ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1975 |
"/ (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
|
1976 |
"/ (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
|
1977 |
"/ con := con sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1978 |
"/ ]. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1979 |
"/ ^ nil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1980 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1981 |
"/ 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
|
1982 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1983 |
"/ (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
|
1984 |
"/ 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
|
1985 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1986 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1987 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1988 |
OBJ theContext; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1989 |
int flagMask = 0; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1990 |
INT mask; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1991 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1992 |
if (findHandleContext == true) |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1993 |
flagMask = __HANDLE_MARK; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1994 |
if (findRaiseContext == true) |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1995 |
flagMask |= __RAISE_MARK; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1996 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1997 |
mask = __MASKSMALLINT(flagMask); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1998 |
theContext = __INST(sender_); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1999 |
while (__isNonNilObject(theContext)) { |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2000 |
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
|
2001 |
if (__isLazy(theContext)) { |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2002 |
__PATCHUPCONTEXT(theContext); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2003 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2004 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2005 |
if (! __isNonLIFO(theContext)) { |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2006 |
/* |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2007 |
* to be prepared for the worst situation |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2008 |
* (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
|
2009 |
* 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
|
2010 |
* 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
|
2011 |
*/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2012 |
theContext->o_space |= CATCHMARK; |
4485 | 2013 |
#if 0 |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2014 |
_markNonLIFO(theContext); |
4485 | 2015 |
#endif |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2016 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2017 |
RETURN (theContext); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2018 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2019 |
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
|
2020 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2021 |
%}. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2022 |
^ nil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2023 |
! ! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2024 |
|
1051 | 2025 |
!Context methodsFor:'special accessing'! |
2026 |
||
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2027 |
argAndVarNames |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2028 |
"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
|
2029 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2030 |
|homeContext method block numArgs numVars m src |
8217 | 2031 |
sel isDoIt blocksLineNr extractFromBlock sender| |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2032 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2033 |
numArgs := self numArgs. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2034 |
numVars := self numVars. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2035 |
(numArgs == 0 and:[numVars == 0]) ifTrue:[^ #()]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2036 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2037 |
homeContext := self methodHome. |
7652 | 2038 |
homeContext notNil ifTrue:[ |
2039 |
sel := homeContext selector. |
|
2040 |
method := homeContext method. |
|
2041 |
]. |
|
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2042 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2043 |
extractFromBlock := |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2044 |
[ |
8772
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2045 |
|blockNode argNames varNames vars args blocksHome| |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2046 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2047 |
blockNode := Compiler |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2048 |
blockAtLine:blocksLineNr |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2049 |
in:m |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2050 |
orSource:src |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2051 |
numArgs:numArgs |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2052 |
numVars:numVars. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2053 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2054 |
blockNode notNil ifTrue:[ |
8772
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2055 |
"/ a kludge |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2056 |
blockNode lineNumber == blocksLineNr ifTrue:[ |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2057 |
blocksHome := blockNode home. |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2058 |
(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
|
2059 |
(blocksHome numArgs == numArgs |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2060 |
and:[ blocksHome numVars == numVars ]) ifTrue:[ |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2061 |
blockNode := blocksHome |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2062 |
]. |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2063 |
]. |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2064 |
]. |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2065 |
|
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2066 |
argNames := #(). |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2067 |
varNames := #(). |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2068 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2069 |
numArgs > 0 ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2070 |
vars := blockNode arguments. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2071 |
vars size > 0 ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2072 |
argNames := vars collect:[:var | var name] |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2073 |
] |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2074 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2075 |
numVars > 0 ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2076 |
vars := blockNode variables. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2077 |
vars size > 0 ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2078 |
varNames := vars collect:[:var | var name]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2079 |
] |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2080 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2081 |
^ argNames , varNames |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2082 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2083 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2084 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2085 |
"/ #doIt needs special handling below |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2086 |
isDoIt := (sel == #'doIt') or:[sel == #'doIt:']. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2087 |
self isBlockContext ifFalse:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2088 |
isDoIt ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2089 |
method notNil ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2090 |
"/ special for #doIt |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2091 |
m := nil. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2092 |
src := ('[' , method source , '\]') withCRs. |
8217 | 2093 |
"/ blocksLineNr := self lineNumber. |
8242
594cfd2150f7
oops - must care for doIt contexts
Claus Gittinger <cg@exept.de>
parents:
8217
diff
changeset
|
2094 |
blocksLineNr := (self home ? self) lineNumber. |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2095 |
extractFromBlock value. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2096 |
] |
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 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2099 |
method notNil ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2100 |
^ method methodArgAndVarNames. |
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 |
^ #() |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2103 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2104 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2105 |
method notNil ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2106 |
isDoIt ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2107 |
"/ special for #doIt |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2108 |
"/ my source is found in the method. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2109 |
m := nil. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2110 |
src := ('[' , method source , '\]') withCRs. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2111 |
] ifFalse:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2112 |
m := method. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2113 |
src := nil. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2114 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2115 |
blocksLineNr := self lineNumber. |
8020 | 2116 |
extractFromBlock value. |
7747
27be5f627b03
fixed argAndVarNames for inner blocks.
Claus Gittinger <cg@exept.de>
parents:
7652
diff
changeset
|
2117 |
blocksLineNr := self home lineNumber. |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2118 |
extractFromBlock value. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2119 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2120 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2121 |
blocksLineNr isNil ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2122 |
self isBlockContext ifTrue:[ |
8217 | 2123 |
sender := self sender. |
2124 |
(sender notNil |
|
2125 |
and:[sender receiver isBlock |
|
2126 |
and:[sender selector startsWith:'value']]) |
|
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2127 |
ifTrue:[ |
8217 | 2128 |
block := sender receiver. |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2129 |
src := block source. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2130 |
src isNil ifTrue:[ |
8488 | 2131 |
self error:'no source'. |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2132 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2133 |
blocksLineNr := 1. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2134 |
extractFromBlock value. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2135 |
]. |
8217 | 2136 |
sender := nil. |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2137 |
]. |
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 |
^ #() |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2141 |
! |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2142 |
|
4557 | 2143 |
canResume |
2144 |
"return true, if the receiver allows to be resumed. |
|
2145 |
Due to the implementation, this requires that the context which |
|
2146 |
is right below the receiver is returnable." |
|
2147 |
||
2148 |
|theContext| |
|
2149 |
||
2150 |
" |
|
2151 |
starting with this context, find the one below |
|
2152 |
(i.e. the one that I have called) and return from it. |
|
2153 |
" |
|
2154 |
%{ |
|
2155 |
OBJ sndr; |
|
2156 |
||
2157 |
theContext = __thisContext; |
|
2158 |
while (theContext != nil) { |
|
2159 |
sndr = __ContextInstPtr(theContext)->c_sender; |
|
2160 |
if (sndr == self) break; |
|
2161 |
theContext = sndr; |
|
2162 |
} |
|
2163 |
if (theContext != nil) { |
|
2164 |
if (__isLazy(theContext)) { |
|
2165 |
__PATCHUPCONTEXT(theContext); |
|
2166 |
} |
|
2167 |
} |
|
2168 |
%}. |
|
2169 |
theContext isNil ifTrue:[ |
|
2170 |
^ false |
|
2171 |
]. |
|
2172 |
^ theContext canReturn |
|
2173 |
! |
|
2174 |
||
1051 | 2175 |
canReturn |
2176 |
"return true, if the receiver allows returning through it. |
|
4557 | 2177 |
Blocks, (currently) always return false. |
2646 | 2178 |
Methods which contain a (non-inlined) block are always |
2179 |
returnable - for other methods, it depends on how the system |
|
2180 |
was compiled (stc flag +/-optContext). |
|
2181 |
If it was compiled with +optContext, methods are compiled |
|
4557 | 2182 |
non returnable, unless a return-pragma was present in the method. |
2646 | 2183 |
Since this saves some administrative work in every method |
2184 |
invocation and makes overall execution faster, the system classes |
|
2185 |
are all compiled with this flag turned on." |
|
1051 | 2186 |
|
2187 |
%{ /* NOCONTEXT */ |
|
2188 |
||
3508 | 2189 |
RETURN ( ((INT)(__INST(flags)) & __MASKSMALLINT(__CANNOT_RETURN)) ? false : true ); |
5441 | 2190 |
%}. |
2191 |
^ true |
|
1051 | 2192 |
! |
2193 |
||
1492 | 2194 |
hasStackToShow |
2646 | 2195 |
"private interface to the debugger. |
2196 |
Smalltalk contexts return false here - other language frames |
|
2197 |
(i.e. Java frames) may want to show the evaluation stack" |
|
2198 |
||
1492 | 2199 |
^ false |
2200 |
||
2201 |
"Created: 28.6.1996 / 14:48:39 / cg" |
|
2646 | 2202 |
"Modified: 13.5.1997 / 16:31:12 / cg" |
1492 | 2203 |
! |
2204 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2205 |
isHandleContext |
4505 | 2206 |
"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
|
2207 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2208 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2209 |
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
|
2210 |
%} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2211 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2212 |
|
1051 | 2213 |
isNonLifo |
2646 | 2214 |
"return true, if this is a nonLifo context. |
2215 |
A nonLifo context is one that is still on the machine stack, |
|
2216 |
but has a reference taken and needs to be converted to a real |
|
2217 |
object (in objectMemory) when the method/block returns. |
|
2218 |
You dont have to understand this - this is a special ST/X |
|
2219 |
debug query, which may be removed without notice." |
|
1051 | 2220 |
|
2221 |
%{ /* NOCONTEXT */ |
|
1133 | 2222 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__NONLIFO)) ? true : false ); |
1051 | 2223 |
%} |
2224 |
! |
|
2225 |
||
2226 |
isOnMachineStack |
|
2227 |
"return true, if this is a machine stack context as opposed to a |
|
2646 | 2228 |
real heap context. |
2229 |
You dont have to understand this - this is a special ST/X |
|
2230 |
debug query, which may be removed without notice." |
|
1051 | 2231 |
|
2232 |
%{ /* NOCONTEXT */ |
|
2233 |
RETURN ( (__qSpace(self) >= STACKSPACE) ? true : false ); |
|
2234 |
%} |
|
2235 |
! |
|
2236 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2237 |
isRaiseContext |
4505 | 2238 |
"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
|
2239 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2240 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2241 |
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
|
2242 |
%} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2243 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2244 |
|
1051 | 2245 |
isSpecial |
2246 |
"return true, if this is either a nonLifo or interrupted context" |
|
2247 |
||
2248 |
%{ /* NOCONTEXT */ |
|
1133 | 2249 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__SPECIAL)) ? true : false ); |
1051 | 2250 |
%} |
2251 |
! |
|
2252 |
||
2253 |
isUnwindContext |
|
2254 |
"return true, if this is an unwindContext" |
|
2255 |
||
2256 |
%{ /* NOCONTEXT */ |
|
1133 | 2257 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__UNWIND_MARK)) ? true : false ); |
1051 | 2258 |
%} |
8578 | 2259 |
! |
2260 |
||
2261 |
tempNames |
|
2262 |
"helper: given a context, return a collection of arg, var and temporary names" |
|
2263 |
||
2264 |
|names nTemps| |
|
2265 |
||
2266 |
names := self argAndVarNames. |
|
2267 |
(nTemps := self numTemps) > 0 ifTrue:[ |
|
2268 |
^ names , ((1 to:nTemps) collect:[:idx | '_tmp' , idx printString]). |
|
2269 |
]. |
|
2270 |
^ names. |
|
1051 | 2271 |
! ! |
2272 |
||
623 | 2273 |
!Context methodsFor:'testing'! |
2274 |
||
2275 |
isBlockContext |
|
2276 |
"return true, iff the receiver is a BlockContext, false otherwise" |
|
2277 |
||
2278 |
^ false |
|
2279 |
! |
|
2280 |
||
2281 |
isContext |
|
2282 |
"return true, iff the receiver is a Context, false otherwise" |
|
2283 |
||
2284 |
^ true |
|
2285 |
! |
|
2286 |
||
2287 |
isRecursive |
|
2288 |
"return true, if this context is one of a recursive send of the same |
|
1483 | 2289 |
selector to the same receiver before. |
2290 |
Here, different arguments are ignored - i.e. only the same method |
|
2291 |
counts for recursiveness. |
|
623 | 2292 |
Used to detect recursive errors or recursive printing - for example." |
2293 |
||
2291
af7652b82404
avoid touching contexts (making them nonLifo) when searching for unwind-contexts,
Claus Gittinger <cg@exept.de>
parents:
2285
diff
changeset
|
2294 |
|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
|
2295 |
|
af7652b82404
avoid touching contexts (making them nonLifo) when searching for unwind-contexts,
Claus Gittinger <cg@exept.de>
parents:
2285
diff
changeset
|
2296 |
count := 0. |
af7652b82404
avoid touching contexts (making them nonLifo) when searching for unwind-contexts,
Claus Gittinger <cg@exept.de>
parents:
2285
diff
changeset
|
2297 |
|
2893 | 2298 |
c := self findNextContextWithSelector:selector or:nil or:nil. |
623 | 2299 |
[c notNil] whileTrue:[ |
3143 | 2300 |
(c receiver == receiver) ifTrue:[ |
2301 |
" |
|
2302 |
stupid: the current ST/X context does not include |
|
2303 |
the method, but the class, in which the search started ... |
|
2304 |
" |
|
2291
af7652b82404
avoid touching contexts (making them nonLifo) when searching for unwind-contexts,
Claus Gittinger <cg@exept.de>
parents:
2285
diff
changeset
|
2305 |
myMethodsClass isNil ifTrue:[ |
3143 | 2306 |
myMethodsClass := self methodClass. |
2291
af7652b82404
avoid touching contexts (making them nonLifo) when searching for unwind-contexts,
Claus Gittinger <cg@exept.de>
parents:
2285
diff
changeset
|
2307 |
]. |
3143 | 2308 |
c methodClass == myMethodsClass ifTrue:[ |
2309 |
^ true |
|
2310 |
] |
|
2311 |
]. |
|
2312 |
c := c findNextContextWithSelector:selector or:nil or:nil. |
|
2135
6bd144c1c358
newStyle info & error messages
Claus Gittinger <cg@exept.de>
parents:
1853
diff
changeset
|
2313 |
|
3143 | 2314 |
" |
2315 |
this special test was added to get out after a while |
|
2316 |
if the sender chain is corrupt - this gives us at least |
|
2317 |
a chance to find those errors. |
|
2318 |
" |
|
2319 |
count := count + 1. |
|
2320 |
count >= 100000 ifTrue:[ |
|
2321 |
'Context [warning]: bad context chain' errorPrintCR. |
|
2322 |
^ true |
|
2323 |
] |
|
623 | 2324 |
]. |
2325 |
^ false |
|
1483 | 2326 |
|
2135
6bd144c1c358
newStyle info & error messages
Claus Gittinger <cg@exept.de>
parents:
1853
diff
changeset
|
2327 |
"Modified: 10.1.1997 / 17:34:26 / cg" |
623 | 2328 |
! ! |
2329 |
||
1810 | 2330 |
!Context class methodsFor:'documentation'! |
749 | 2331 |
|
2332 |
version |
|
11542 | 2333 |
^ '$Header: /cvs/stx/stx/libbasic/Context.st,v 1.148 2009-02-13 15:10:33 cg Exp $' |
749 | 2334 |
! ! |
7257 | 2335 |
|
623 | 2336 |
Context initialize! |