author | Claus Gittinger <cg@exept.de> |
Thu, 21 Jul 2011 13:36:52 +0200 | |
changeset 13516 | 9bbdb9d05a51 |
parent 13473 | ddcd2ccca22d |
child 13519 | 16c0afd67cae |
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 t itle to or ownership of the software is |
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hereby transferred. |
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" |
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"{ Package: 'stx:libbasic' }" |
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||
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Object variableSubclass:#Context |
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instanceVariableNames:'flags sender* home receiver selector searchClass method lineNr |
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retvalTemp handle*' |
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classVariableNames:'InvalidReturnSignal SingleStepInterruptRequest' |
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poolDictionaries:'' |
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category:'Kernel-Methods' |
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! |
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!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 t itle to or ownership of the software is |
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hereby transferred. |
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" |
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! |
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||
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documentation |
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" |
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Contexts represent the stack frame objects, which keep the processing |
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state of a method or block (i.e. its local variables, temporaries etc.) |
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Every message send adds a context to a chain, which can be traced back via |
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the sender field. The context of the currently active method is always |
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accessable via the pseuodoVariable called 'thisContext'. |
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(The actual implementation uses the machines stack for this, building real |
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contexts on demand only). |
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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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Blockreturn from an outlived context (i.e. its home method has already returned) |
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is now rewarded by an invalidReturn exception - it used to be a noop in previous |
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releases (The blue book described this to be a noop, but other smalltalk implementations |
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changed this to be an invalid operation - good decision) |
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[instance variables:] |
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flags <SmallInteger> used by the VM; never touch. |
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contains info about number of args, |
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locals and temporaries. |
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sender <Context> the 'calling / sending' context |
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This is not directly accessable, since it may |
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be a lazy context (i.e. an empty frame). |
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The #sender method cares for this. |
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home <Context> the context, where this block was |
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created, or nil if its a method context |
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There are also cheap blocks, which do |
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not need a reference to the home context, |
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for those, its nil too. |
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receiver <Object> the receiver of this message |
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selector <Symbol> the selector of this message |
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searchClass <Class> the class, where the message lookup started |
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(for super sends) or nil, for regular sends. |
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lineNr <SmallInteger> the position where the context left off |
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(kind of p-counter). Only the low 16bits |
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are valid. |
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retValTemp nil temporary - always nil, when you see the context |
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(used in the VM as temporary) |
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handle *noObject* used by the VM; not accessable, not an object |
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method the corresponding method |
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<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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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 < 5 or:[con receiver isCollection]]]. |
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"/ one more |
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con notNil ifTrue:[ |
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(' from ' , con printString) errorPrintCR. |
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]. |
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" |
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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. |
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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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! ! |
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!Context class methodsFor:'special searching'! |
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findFirstSpecialHandle:searchForHandle raise:searchForRaise |
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|c| |
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%{ |
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OBJ __c__; |
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__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__)) { |
268 |
__PATCHUPCONTEXT(__c__); |
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} |
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c = __c__; |
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%}. |
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^ c findSpecialHandle:searchForHandle raise:searchForRaise |
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! ! |
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||
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!Context methodsFor:'Compatibility-Squeak'! |
276 |
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longStack |
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^ String streamContents:[:s | |
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self fullPrintAllOn:s |
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] |
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! ! |
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||
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!Context methodsFor:'Compatibility-VW'! |
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resumeWith:value |
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"same as #resume: - visualWorks compatibility" |
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||
288 |
self resume:value |
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! ! |
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||
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!Context methodsFor:'accessing'! |
292 |
||
293 |
argAt:n |
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"return the n'th argument" |
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n > self numArgs ifTrue:[ |
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^ self error:'invalid arg access' |
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]. |
623 | 299 |
^ self at:n |
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301 |
"Modified: 12.10.1996 / 21:44:28 / cg" |
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! |
303 |
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304 |
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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"Modified: 12.10.1996 / 21:44:32 / cg" |
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! |
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316 |
args |
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317 |
"return an array filled with the arguments of this context" |
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|n| |
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320 |
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n := self numArgs. |
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n == 0 ifTrue:[ |
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"/ little optimization here - avaoid creating empty containers |
324 |
^ #() |
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]. |
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^ (Array new:n) replaceFrom:1 to:n with:self. |
327 |
! |
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154 | 328 |
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623 | 329 |
argsAndVars |
330 |
"return an array filled with the arguments and variables of this context" |
|
331 |
||
332 |
|n| |
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333 |
||
1810 | 334 |
n := self numArgs + self numVars. |
3130 | 335 |
n == 0 ifTrue:[ |
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"/ little optimization here - avoid creating empty containers |
337 |
^ #() |
|
3130 | 338 |
]. |
623 | 339 |
^ (Array new:n) replaceFrom:1 to:n with:self. |
1810 | 340 |
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341 |
"Modified: 23.10.1996 / 16:19:41 / cg" |
|
623 | 342 |
! |
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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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%{ /* NOCONTEXT */ |
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RETURN ( __mkSmallInteger( (__intVal(__INST(flags)) >> __NARG_SHIFT) & __NARG_MASK) ); |
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%} |
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! |
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|
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at:n put:value |
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354 |
super at:n put:value. |
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|
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need unfix, when changed via at:put:
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356 |
"/ need some aid for optimized code - |
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357 |
"/ some machines have the arguments/receiver etc. kept in register vars ... |
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358 |
"/ the unfix updates the machine-stack version of the receiver. |
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359 |
%{ |
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__UNFIXCONTEXT(self, 0); |
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%}. |
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^ value |
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! |
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623 | 365 |
home |
366 |
"return the immediate home of the receiver. |
|
367 |
for block contexts, this is the methodcontext, where the block was created, |
|
368 |
for nested block contexts, its the surrounding blocks context. |
|
369 |
for method-contexts this is nil." |
|
25 | 370 |
|
623 | 371 |
^ nil "home" |
372 |
! |
|
1 | 373 |
|
3324
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
374 |
homeReceiver |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
375 |
"return the receiver from the context, where the receiver was defined" |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
376 |
|
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
377 |
^ receiver |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
378 |
|
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
379 |
"Created: / 5.3.1998 / 16:18:26 / stefan" |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
380 |
! |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
381 |
|
1 | 382 |
instVarAt:index |
69 | 383 |
"have to catch instVar access to retVal and handle - they are invalid. |
12841 | 384 |
Notice, that one of the next ST/X versions might get some syntactic |
69 | 385 |
extension to get this automatically)." |
1 | 386 |
|
12841 | 387 |
(index == %{ __MKSMALLINT(__SLOT_CONTEXT_SENDER) %} ) ifTrue:[^ self sender]."/ sender - must be accessed specially |
388 |
(index == %{ __MKSMALLINT(__SLOT_CONTEXT_RETVAL) %} ) ifTrue:[^ nil]. "/ retvalTemp - invisible |
|
389 |
(index == %{ __MKSMALLINT(__SLOT_CONTEXT_HANDLE) %} ) ifTrue:[^ nil]. "/ handle to machine stack - invisible |
|
1 | 390 |
^ super instVarAt:index |
391 |
! |
|
392 |
||
393 |
instVarAt:index put:value |
|
69 | 394 |
"have to catch instVar access to retVal and handle - they are invalid. |
12841 | 395 |
Notice, that one of the next ST/X versions might get some syntactic |
69 | 396 |
extension to get this automatically)." |
1 | 397 |
|
12841 | 398 |
(index == %{ __MKSMALLINT(__SLOT_CONTEXT_SENDER) %} ) ifTrue:[^ nil]. "/ sender - not allowed to change |
399 |
(index == %{ __MKSMALLINT(__SLOT_CONTEXT_RETVAL) %} ) ifTrue:[^ nil]. "/ retvalTemp - not allowed to change |
|
400 |
(index == %{ __MKSMALLINT(__SLOT_CONTEXT_HANDLE) %} ) ifTrue:[^ nil]. "/ handle to machine stack - not allowed to change |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
401 |
super instVarAt:index put:value. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
402 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
403 |
"/ need some aid for optimized code - |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
404 |
"/ some machines have the arguments kept in register vars ... |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
405 |
"/ the unfix updates the machine-stack version of the receiver. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
406 |
%{ |
4570 | 407 |
__UNFIXCONTEXT(self, 0); |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
408 |
%}. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
409 |
^ value |
1 | 410 |
! |
411 |
||
4328
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
412 |
javaLineNumber |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
413 |
|nr pc| |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
414 |
|
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
415 |
lineNr notNil ifTrue:[ |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
416 |
pc := lineNr bitAnd:16rFFFF. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
417 |
]. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
418 |
|
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
419 |
"/ 'ask line for pc:' print. pc printCR. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
420 |
pc isNil ifTrue:[ |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
421 |
nr := self lineNumberFromMethod. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
422 |
nr notNil ifTrue:[ |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
423 |
^ nr |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
424 |
]. |
12841 | 425 |
" '-> 0 [a]' printCR. " |
4328
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
426 |
^0 |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
427 |
]. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
428 |
|
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
429 |
nr := self method lineNumberForPC:pc. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
430 |
nr isNil ifTrue:[ |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
431 |
nr := self lineNumberFromMethod. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
432 |
nr notNil ifTrue:[ |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
433 |
^ nr |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
434 |
]. |
12841 | 435 |
" '-> 0 [b]' printCR. " |
4328
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
436 |
^ 0 |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
437 |
]. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
438 |
"/ '-> ' print. nr printCR. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
439 |
^ nr. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
440 |
|
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
441 |
! |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
442 |
|
623 | 443 |
lineNumber |
444 |
"this returns the lineNumber within the methods source, where the context was |
|
445 |
interrupted or called another method. (currently, sometimes this information |
|
446 |
is not available - in this case 0 is returned)" |
|
1 | 447 |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
448 |
|l| |
3923 | 449 |
|
4328
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
450 |
receiver isJavaObject ifTrue:[ |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
451 |
"/ chances are good that I am a javContext ... |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
452 |
self method isJavaMethod ifTrue:[ |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
453 |
^ self javaLineNumber |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
454 |
] |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
455 |
]. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
456 |
|
3923 | 457 |
lineNr notNil ifTrue:[ |
458 |
l := lineNr bitAnd:16rFFFF. |
|
459 |
]. |
|
460 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
461 |
"/ self isJavaContext ifTrue:[ |nr m| |
3923 | 462 |
"/ m := self method. |
463 |
"/ l isNil ifTrue:[ |
|
464 |
"/ m notNil ifTrue:[ |
|
465 |
"/ nr := m lineNumber |
|
466 |
"/ ]. |
|
467 |
"/ nr notNil ifTrue:[ |
|
468 |
"/ ^ nr |
|
469 |
"/ ]. |
|
470 |
"/ ^0 |
|
471 |
"/ ]. |
|
472 |
"/ nr := self method lineNumberForPC:l. |
|
473 |
"/ nr isNil ifTrue:[ |
|
474 |
"/ m notNil ifTrue:[ |
|
475 |
"/ nr := m lineNumber |
|
476 |
"/ ]. |
|
477 |
"/ nr notNil ifTrue:[ |
|
478 |
"/ ^ nr |
|
479 |
"/ ]. |
|
480 |
"/ ^ 0 |
|
481 |
"/ ]. |
|
482 |
"/ ^ nr. |
|
483 |
"/ ]. |
|
484 |
||
485 |
^ l |
|
486 |
||
487 |
"Modified: / 10.11.1998 / 13:19:48 / cg" |
|
1 | 488 |
! |
489 |
||
4450 | 490 |
lineNumberFromMethod |
491 |
^ 1 |
|
492 |
! |
|
493 |
||
8488 | 494 |
message |
495 |
^ Message selector:selector arguments:self args |
|
496 |
||
497 |
" |
|
9355 | 498 |
thisContext methodHome message |
499 |
thisContext message |
|
8488 | 500 |
" |
501 |
! |
|
502 |
||
1 | 503 |
method |
54 | 504 |
"return the method for which the receiver was created. |
13020 | 505 |
Change with ST/X vsn 6: |
506 |
In older versions, the method was not stored in the context, but a lookup |
|
507 |
was simulated using selector and class. |
|
508 |
(which occasionally returned the wrong method - especially in the debugger, |
|
509 |
when the debugged method was changed). |
|
510 |
This has been changed - especially to support Jan's meta-object protocol. |
|
511 |
It is now stored in the context" |
|
1 | 512 |
|
3508 | 513 |
|c sender sendersSelector m| |
13426 | 514 |
"/. |
12853
3d15dcbe0057
added method-in-context slot.
Claus Gittinger <cg@exept.de>
parents:
12841
diff
changeset
|
515 |
method notNil ifTrue:[ |
3d15dcbe0057
added method-in-context slot.
Claus Gittinger <cg@exept.de>
parents:
12841
diff
changeset
|
516 |
method isMethod ifTrue:[ |
13473 | 517 |
method wrapper isNil ifTrue:[ |
13426 | 518 |
^ method |
519 |
] |
|
12853
3d15dcbe0057
added method-in-context slot.
Claus Gittinger <cg@exept.de>
parents:
12841
diff
changeset
|
520 |
] |
3d15dcbe0057
added method-in-context slot.
Claus Gittinger <cg@exept.de>
parents:
12841
diff
changeset
|
521 |
]. |
13426 | 522 |
"/ |
12841 | 523 |
|
325 | 524 |
c := self searchClass. |
525 |
" |
|
526 |
the below cannot happen in normal circumstances |
|
527 |
(added to avoid recursive errors in case of a broken sender chain) |
|
528 |
" |
|
529 |
c isBehavior ifFalse:[ |
|
12841 | 530 |
'Context [error]: non class in searchClass' errorPrintCR. |
531 |
' selector: ' errorPrint. selector errorPrint. |
|
532 |
' receiver: ' errorPrint. receiver errorPrintCR. |
|
533 |
^ nil |
|
325 | 534 |
]. |
535 |
||
328 | 536 |
c := c whichClassIncludesSelector:selector. |
1 | 537 |
c notNil ifTrue:[ |
12853
3d15dcbe0057
added method-in-context slot.
Claus Gittinger <cg@exept.de>
parents:
12841
diff
changeset
|
538 |
method := c compiledMethodAt:selector. |
3d15dcbe0057
added method-in-context slot.
Claus Gittinger <cg@exept.de>
parents:
12841
diff
changeset
|
539 |
^ method |
1 | 540 |
]. |
216 | 541 |
|
3508 | 542 |
"mhmh - seems to be a context for an unbound method (as generated by doIt); |
216 | 543 |
look in the senders context. Consider this a kludge. |
3143 | 544 |
(maybe it was not too good of an idea to NOT keep the current |
545 |
method in the context ...) |
|
546 |
Future versions of ST/X's message lookup may store the method in |
|
547 |
the context. |
|
216 | 548 |
" |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
549 |
sender := self sender. |
3143 | 550 |
sender notNil ifTrue:[ |
12841 | 551 |
sendersSelector := sender selector. |
552 |
sendersSelector notNil ifTrue:[ |
|
553 |
(sendersSelector startsWith:'valueWithReceiver:') ifTrue:[ |
|
554 |
m := sender receiver. |
|
555 |
m isMethod ifTrue:[ |
|
12853
3d15dcbe0057
added method-in-context slot.
Claus Gittinger <cg@exept.de>
parents:
12841
diff
changeset
|
556 |
method := m. |
12841 | 557 |
^ m |
558 |
] |
|
559 |
] |
|
560 |
] |
|
216 | 561 |
]. |
562 |
||
1 | 563 |
^ nil |
2135
6bd144c1c358
newStyle info & error messages
Claus Gittinger <cg@exept.de>
parents:
1853
diff
changeset
|
564 |
|
13426 | 565 |
"Modified: / 28-06-2011 / 20:23:05 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
13473 | 566 |
"Modified: / 01-07-2011 / 09:39:45 / cg" |
1 | 567 |
! |
568 |
||
212 | 569 |
methodClass |
570 |
"return the class in which the method for which the receiver was created is." |
|
571 |
||
1456 | 572 |
|cls m| |
573 |
||
12853
3d15dcbe0057
added method-in-context slot.
Claus Gittinger <cg@exept.de>
parents:
12841
diff
changeset
|
574 |
method notNil ifTrue:[ |
3d15dcbe0057
added method-in-context slot.
Claus Gittinger <cg@exept.de>
parents:
12841
diff
changeset
|
575 |
method isMethod ifTrue:[ |
3d15dcbe0057
added method-in-context slot.
Claus Gittinger <cg@exept.de>
parents:
12841
diff
changeset
|
576 |
^ method mclass |
3d15dcbe0057
added method-in-context slot.
Claus Gittinger <cg@exept.de>
parents:
12841
diff
changeset
|
577 |
] |
3d15dcbe0057
added method-in-context slot.
Claus Gittinger <cg@exept.de>
parents:
12841
diff
changeset
|
578 |
]. |
12841 | 579 |
|
1456 | 580 |
cls := self searchClass. |
3923 | 581 |
(cls isMeta |
582 |
and:[cls soleInstance isJavaClass]) ifTrue:[ |
|
583 |
cls := cls soleInstance |
|
584 |
]. |
|
1456 | 585 |
|
3923 | 586 |
[cls notNil] whileTrue:[ |
587 |
cls := cls whichClassIncludesSelector:selector. |
|
588 |
cls isNil ifTrue:[^ nil]. |
|
589 |
||
590 |
m := cls compiledMethodAt:selector. |
|
591 |
m notNil ifTrue:[ |
|
592 |
m isIgnored ifFalse:[^ cls]. |
|
593 |
]. |
|
594 |
cls := cls superclass |
|
1456 | 595 |
]. |
596 |
^ cls |
|
597 |
||
3923 | 598 |
"Modified: / 5.11.1998 / 19:07:43 / cg" |
212 | 599 |
! |
600 |
||
623 | 601 |
methodHome |
602 |
"return the method-home - for method contexts this is the receiver" |
|
603 |
||
604 |
^ self |
|
605 |
! |
|
606 |
||
607 |
ntemp |
|
608 |
"return the number of temporary variables of the Block/Method. |
|
1810 | 609 |
(for debugging only). |
610 |
I dont like the name of this method; its here for compatibility." |
|
623 | 611 |
|
1810 | 612 |
^ self numTemps |
613 |
||
614 |
"Modified: 23.10.1996 / 16:19:06 / cg" |
|
623 | 615 |
! |
616 |
||
617 |
numArgs |
|
618 |
"return the number of arguments to the Block/Method" |
|
619 |
||
620 |
%{ /* NOCONTEXT */ |
|
621 |
||
8913 | 622 |
RETURN ( __mkSmallInteger( (__intVal(__INST(flags)) >> __NARG_SHIFT) & __NARG_MASK) ); |
623 | 623 |
%} |
624 |
! |
|
625 |
||
1810 | 626 |
numTemps |
627 |
"return the number of temporary variables of the Block/Method. |
|
628 |
(for debugging only)" |
|
629 |
||
630 |
^ self size - self numArgs - self numVars |
|
631 |
||
632 |
"Created: 23.10.1996 / 16:19:10 / cg" |
|
633 |
"Modified: 23.10.1996 / 16:19:48 / cg" |
|
634 |
! |
|
635 |
||
636 |
numVars |
|
623 | 637 |
"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
|
638 |
|
623 | 639 |
%{ /* NOCONTEXT */ |
640 |
||
8913 | 641 |
RETURN ( __mkSmallInteger( (__intVal(__INST(flags)) >> __NVAR_SHIFT) & __NVAR_MASK) ); |
623 | 642 |
%} |
643 |
! |
|
644 |
||
1810 | 645 |
nvars |
646 |
"return the number of local variables of the Block/Method. |
|
647 |
I dont like the name of this method; its here for compatibility." |
|
648 |
||
649 |
^ self numVars |
|
650 |
||
651 |
"Modified: 23.10.1996 / 16:18:44 / cg" |
|
652 |
! |
|
653 |
||
13426 | 654 |
programmingLanguage |
655 |
||
656 |
^method |
|
657 |
ifNotNil:[method programmingLanguage] |
|
658 |
ifNil:[SmalltalkLanguage instance] |
|
659 |
||
660 |
"Created: / 17-03-2011 / 10:17:14 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
|
661 |
! |
|
662 |
||
623 | 663 |
receiver |
664 |
"return the receiver of the context" |
|
665 |
||
666 |
^ receiver |
|
667 |
! |
|
668 |
||
4543 | 669 |
receiver:aCompiledCode |
670 |
"set the receiver of the message" |
|
671 |
||
4560
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
672 |
receiver := aCompiledCode. |
4543 | 673 |
|
4560
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
674 |
"/ need some aid for optimized code - |
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
675 |
"/ some machines have the arguments kept in register vars ... |
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
676 |
"/ 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
|
677 |
%{ |
4570 | 678 |
__UNFIXCONTEXT(self, 0); |
4560
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
679 |
%}. |
4543 | 680 |
|
681 |
! |
|
682 |
||
623 | 683 |
searchClass |
684 |
"this is the class where the method-lookup started; |
|
685 |
for normal sends, it is nil (or sometimes the receivers class). |
|
686 |
For supersends, its the superclass of the one, in which the |
|
687 |
caller was defined." |
|
688 |
||
689 |
searchClass notNil ifTrue:[^ searchClass]. |
|
690 |
^ receiver class |
|
691 |
! |
|
692 |
||
693 |
selector |
|
694 |
"return the selector of the method for which the context was created" |
|
695 |
||
696 |
^ selector |
|
536
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
697 |
! |
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
698 |
|
1 | 699 |
sender |
700 |
"return the sender of the context" |
|
701 |
||
536
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
702 |
%{ /* NOCONTEXT */ |
1668
41db5950f9ea
oops - con local variables are now renamed (last change in stc)
Claus Gittinger <cg@exept.de>
parents:
1492
diff
changeset
|
703 |
OBJ theContext; |
536
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
704 |
|
3508 | 705 |
theContext = __INST(sender_); |
949 | 706 |
/* |
707 |
* this special nil test is for the very first context (startup-context); |
|
708 |
* actually, its cosmetics, to avoid a visible nil>>nil context in the debugger. |
|
709 |
*/ |
|
2205 | 710 |
if (__isNonNilObject(theContext)) { |
949 | 711 |
|
12841 | 712 |
if (__isLazy(theContext)) { |
713 |
/* |
|
714 |
* this cannot happen |
|
715 |
*/ |
|
716 |
__PATCHUPCONTEXT(theContext); |
|
717 |
} |
|
718 |
if (! __isNonLIFO(theContext)) { |
|
719 |
/* |
|
720 |
* to be prepared for the worst situation |
|
721 |
* (the sender is not stored, so the trap wont catch it) |
|
722 |
* make the writeBarrier trigger manually. |
|
723 |
* We'll see, if this is really required. |
|
724 |
*/ |
|
725 |
theContext->o_space |= CATCHMARK; |
|
726 |
_markNonLIFO(theContext); |
|
727 |
} |
|
536
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
728 |
} |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
729 |
RETURN (theContext); |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
730 |
%} |
1 | 731 |
! |
732 |
||
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
733 |
senderIsNil |
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
734 |
"return true, if I have no sender" |
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
735 |
|
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
736 |
%{ /* NOCONTEXT */ |
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
737 |
if ( __INST(sender_) == nil ) { |
5422 | 738 |
RETURN (true); |
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
739 |
} |
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
740 |
RETURN (false); |
5422 | 741 |
%}. |
742 |
^ self sender isNil |
|
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
743 |
! |
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
744 |
|
623 | 745 |
setLineNumber:aNumber |
746 |
"private entry for uncompiledCodeObject ..." |
|
1 | 747 |
|
623 | 748 |
lineNr := aNumber |
340 | 749 |
! |
750 |
||
5749 | 751 |
setNumArgs:nA numVars:nV |
752 |
"set the number of arguments and variables" |
|
753 |
||
754 |
%{ /* NOCONTEXT */ |
|
8910 | 755 |
INT flg; |
5749 | 756 |
|
757 |
flg = __intVal(__INST(flags)); |
|
758 |
flg = flg & ~(__NARG_MASK << __NARG_SHIFT); |
|
759 |
flg = flg & ~(__NVAR_MASK << __NVAR_SHIFT); |
|
760 |
flg = flg | __intVal(nA) << __NARG_SHIFT; |
|
761 |
flg = flg | __intVal(nV) << __NVAR_SHIFT; |
|
8913 | 762 |
__INST(flags) = __mkSmallInteger(flg); |
5749 | 763 |
%} |
764 |
! |
|
765 |
||
12841 | 766 |
tempAt:index |
8578 | 767 |
"return the n'th stack-temporary variable" |
768 |
||
769 |
^ self at:index |
|
770 |
! |
|
771 |
||
12841 | 772 |
temporaries |
202 | 773 |
"return an array filled with the temporaries of this context" |
774 |
||
308 | 775 |
|nonTemps mySize| |
202 | 776 |
|
1810 | 777 |
nonTemps := self numArgs + self numVars. |
778 |
mySize := self numTemps. |
|
3130 | 779 |
mySize == 0 ifTrue:[ |
12841 | 780 |
"/ little optimization here - avaoid creating empty containers |
781 |
^ #() |
|
3130 | 782 |
]. |
308 | 783 |
^ (Array new:mySize) replaceFrom:1 to:mySize with:self startingAt:nonTemps+1 |
1810 | 784 |
|
785 |
"Modified: 23.10.1996 / 16:20:00 / cg" |
|
202 | 786 |
! |
787 |
||
10 | 788 |
varAt:n |
789 |
"return the n'th local variable" |
|
790 |
||
154 | 791 |
^ self at:(n + self numArgs) |
10 | 792 |
! |
793 |
||
794 |
varAt:n put:value |
|
795 |
"set the n'th local variable - useful when the receiver should be restarted |
|
54 | 796 |
or continued" |
10 | 797 |
|
154 | 798 |
self at:(n + self numArgs) put:value |
10 | 799 |
! |
800 |
||
12841 | 801 |
vars |
623 | 802 |
"return an array filled with the local variables of this context" |
375 | 803 |
|
623 | 804 |
|nonVars mySize| |
360 | 805 |
|
623 | 806 |
nonVars := self numArgs. |
1810 | 807 |
mySize := self numVars. |
3130 | 808 |
mySize == 0 ifTrue:[ |
12841 | 809 |
"/ little optimization here - avaoid creating empty containers |
810 |
^ #() |
|
3130 | 811 |
]. |
623 | 812 |
^ (Array new:mySize) replaceFrom:1 to:mySize with:self startingAt:nonVars+1 |
1810 | 813 |
|
814 |
"Modified: 23.10.1996 / 16:20:06 / cg" |
|
1 | 815 |
! ! |
816 |
||
623 | 817 |
!Context methodsFor:'copying'! |
415 | 818 |
|
10943 | 819 |
deepCopyUsing:aDictionary postCopySelector:postCopySelector |
623 | 820 |
"raise an error - deepCopy is not allowed for contexts" |
37 | 821 |
|
10136 | 822 |
|copyOfMe| |
3350
40dc4807a6d4
must catch #deppCopyUsing: instead of #deepCopy.
Claus Gittinger <cg@exept.de>
parents:
3324
diff
changeset
|
823 |
|
10136 | 824 |
copyOfMe := self shallowCopy. |
825 |
copyOfMe setSender:nil. |
|
13516
9bbdb9d05a51
changed: #deepCopyUsing:postCopySelector:
Claus Gittinger <cg@exept.de>
parents:
13473
diff
changeset
|
826 |
copyOfMe perform:postCopySelector withOptionalArgument:self and:aDictionary. |
10136 | 827 |
^ copyOfMe |
828 |
||
829 |
"Created: / 31-03-1998 / 15:51:14 / cg" |
|
830 |
"Modified: / 20-10-2006 / 14:54:12 / User" |
|
13516
9bbdb9d05a51
changed: #deepCopyUsing:postCopySelector:
Claus Gittinger <cg@exept.de>
parents:
13473
diff
changeset
|
831 |
"Modified: / 21-07-2011 / 13:30:21 / cg" |
1 | 832 |
! ! |
833 |
||
77 | 834 |
!Context methodsFor:'error handling'! |
835 |
||
836 |
invalidReturn:returnValue |
|
837 |
"this message is sent by the VM, when a methods context |
|
838 |
which has already returned is about to return again. |
|
839 |
(i.e. about to execute a return from an already returned |
|
105 | 840 |
method in a block). |
141 | 841 |
We raise a signal here, to allow catching of that situation." |
77 | 842 |
|
406 | 843 |
" |
844 |
in previous versions of ST/X and ST-80, this was no error; |
|
845 |
(instead, a normal blockreturn was performed to the value-sender). |
|
846 |
From a note in comp.lang.smalltalk, I conclude that new ST-80 versions |
|
847 |
now raise an error if this happens. |
|
848 |
Comment out the raise below to get that (old) behavior |
|
849 |
BETTER REWRITE YOUR APPLICATION |
|
12841 | 850 |
" |
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
851 |
"/ old behavior: |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
852 |
"/ ^ returnValue |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
853 |
|
282 | 854 |
"/ new behavior: |
855 |
||
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
856 |
"/ 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
|
857 |
"/ use another error message. |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
858 |
|
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
859 |
(home notNil and:[home sender notNil]) ifTrue:[ |
12841 | 860 |
^ CannotReturnError |
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
861 |
raiseRequestWith:returnValue |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
862 |
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
|
863 |
]. |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
864 |
|
12841 | 865 |
^ CannotReturnError |
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
866 |
raiseRequestWith:returnValue. |
282 | 867 |
|
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
868 |
"Modified: / 2.2.1998 / 15:19:52 / cg" |
406 | 869 |
! |
870 |
||
871 |
invalidReturnOrRestart:returnValue |
|
872 |
"this message is sent by the VM, when a methods context |
|
873 |
which was compiled non-returnable is about to return again. |
|
874 |
We raise a signal here, to allow catching of that situation." |
|
875 |
||
6002 | 876 |
^ CannotReturnError |
877 |
raiseRequestWith:returnValue |
|
878 |
errorString:'method was compiled non-resumable' |
|
360 | 879 |
! |
880 |
||
881 |
invalidReturnOrRestartError:how with:value |
|
882 |
"common error reporter for restart/return errors" |
|
12841 | 883 |
|
360 | 884 |
self canReturn ifTrue:[ |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
885 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
886 |
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
|
887 |
(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
|
888 |
" |
12841 | 889 |
^ CannotReturnError |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
890 |
raiseRequestWith:value |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
891 |
errorString:(how , ' context not on calling chain') |
360 | 892 |
]. |
893 |
" |
|
894 |
tried to return from/restart a context of a method which was compiled |
|
895 |
unrestartable or of a block (which is never restartable) |
|
896 |
" |
|
12841 | 897 |
^ CannotReturnError |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
898 |
raiseRequestWith:value |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
899 |
errorString:(how , ' context cannot be restarted/returned from') |
77 | 900 |
! ! |
901 |
||
6404 | 902 |
!Context methodsFor:'fixups'! |
903 |
||
904 |
fixAllLineNumbers |
|
905 |
%{ |
|
906 |
__PATCHUPCONTEXTS(__thisContext); |
|
6424 | 907 |
__CONTEXTLINENOS(self); |
6404 | 908 |
%} |
909 |
! ! |
|
910 |
||
623 | 911 |
!Context methodsFor:'minidebugger printing'! |
912 |
||
913 |
fullPrint |
|
12841 | 914 |
"print the receiver, selector and args of the context |
623 | 915 |
- used only for MiniDebuggers walkback print" |
916 |
||
917 |
self receiverPrintString print. ' ' print. selector print. |
|
918 |
self size ~~ 0 ifTrue: [ |
|
12841 | 919 |
' ' print. self argsDisplayString print |
623 | 920 |
]. |
1426 | 921 |
' [' print. self lineNumber print. ']' printCR |
623 | 922 |
|
923 |
" |
|
924 |
thisContext fullPrint |
|
925 |
" |
|
1426 | 926 |
|
927 |
"Modified: 20.5.1996 / 10:27:14 / cg" |
|
623 | 928 |
! |
929 |
||
930 |
fullPrintAll |
|
931 |
"print a full walkback starting at the receiver |
|
932 |
- used only for MiniDebuggers walkback print" |
|
933 |
||
934 |
|context| |
|
935 |
||
936 |
context := self. |
|
937 |
[context notNil] whileTrue: [ |
|
12841 | 938 |
context fullPrint. |
939 |
context := context sender |
|
623 | 940 |
] |
941 |
||
942 |
" |
|
943 |
thisContext fullPrintAll |
|
944 |
" |
|
2173 | 945 |
! |
946 |
||
4674 | 947 |
fullPrintAllLevels:nOrNil |
948 |
"print a full walkback starting at the receiver, only print n levels |
|
949 |
- used only for MiniDebuggers walkback print" |
|
950 |
||
951 |
|context count| |
|
952 |
||
953 |
count := 0. |
|
954 |
context := self. |
|
955 |
[context notNil] whileTrue: [ |
|
956 |
context fullPrint. |
|
957 |
context := context sender. |
|
5911 | 958 |
nOrNil notNil ifTrue:[ |
4674 | 959 |
(count := count+1) > nOrNil ifTrue:[^self]. |
960 |
] |
|
961 |
] |
|
962 |
||
963 |
" |
|
6648 | 964 |
thisContext fullPrintAllLevels:5 |
4674 | 965 |
" |
966 |
||
967 |
"Created: / 3.9.1999 / 14:02:38 / ps" |
|
11540 | 968 |
! |
969 |
||
11542 | 970 |
printAll |
971 |
"print a full walkback starting at the receiver, only print n levels |
|
972 |
- used only for MiniDebuggers walkback print" |
|
973 |
||
974 |
self printAllLevels:nil |
|
975 |
||
976 |
" |
|
977 |
thisContext printAll |
|
978 |
" |
|
979 |
! |
|
980 |
||
11540 | 981 |
printAllLevels:nOrNil |
982 |
"print a full walkback starting at the receiver, only print n levels |
|
983 |
- used only for MiniDebuggers walkback print" |
|
984 |
||
985 |
|context count| |
|
986 |
||
987 |
count := 0. |
|
988 |
context := self. |
|
11544 | 989 |
'--------------------------' printCR. |
11540 | 990 |
[context notNil] whileTrue: [ |
991 |
context printCR. |
|
992 |
context := context sender. |
|
993 |
nOrNil notNil ifTrue:[ |
|
11543 | 994 |
(count := count+1) > nOrNil ifTrue:[ |
995 |
'--------------------------' printCR. |
|
12841 | 996 |
^ self |
11543 | 997 |
]. |
11540 | 998 |
] |
11545 | 999 |
]. |
1000 |
'--------------------------' printCR. |
|
11540 | 1001 |
|
1002 |
" |
|
1003 |
thisContext printAllLevels:5 |
|
1004 |
" |
|
623 | 1005 |
! ! |
1006 |
||
1 | 1007 |
!Context methodsFor:'non local control flow'! |
1008 |
||
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1009 |
evaluateUnwindActionsUpTo:aContext |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1010 |
"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
|
1011 |
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
|
1012 |
marked using #markForUnwind. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1013 |
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
|
1014 |
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
|
1015 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1016 |
|con unwindBlock| |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1017 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1018 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1019 |
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
|
1020 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1021 |
con := self findNextUnwindContextOr:aContext. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1022 |
[con notNil and:[con ~~ aContext]] whileTrue:[ |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1023 |
unwindBlock := con receiver unwindHandlerInContext:con. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1024 |
con unmarkForUnwind. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1025 |
unwindBlock value. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1026 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1027 |
con := con findNextUnwindContextOr:aContext. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1028 |
]. |
11340
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1029 |
"/ 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
|
1030 |
(con notNil and:[con isMarkedForUnwind]) ifTrue:[ |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1031 |
unwindBlock := con receiver unwindHandlerInContext:con. |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1032 |
con unmarkForUnwind. |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1033 |
unwindBlock value. |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1034 |
]. |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1035 |
^ con |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1036 |
! |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1037 |
|
1 | 1038 |
restart |
1039 |
"restart the receiver - i.e. the method is evaluated again. |
|
402 | 1040 |
if the context to restart already died, trigger an error. |
141 | 1041 |
This is a low level helper for unwindAndRestart. |
1042 |
||
12841 | 1043 |
NOTICE: |
1044 |
NO unwind actions are performed - this is usually not |
|
1045 |
what you want (see Context>>unwindAndRestart). |
|
1046 |
||
1047 |
LIMITATION: |
|
1048 |
currently a context can only be restarted by |
|
1049 |
the owning process - not from outside. |
|
1050 |
Also, the compiler has an option (+optcontext) to create |
|
1051 |
non-restartable contexts (which are faster). |
|
1052 |
If such a context is restarted, a runtime error is raised." |
|
1 | 1053 |
|
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1054 |
%{ /* NOCONTEXT */ |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1055 |
if (__INST(sender_) != nil) { |
12841 | 1056 |
__RESUMECONTEXT__(self, RESTART_VALUE, 0); |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1057 |
} |
360 | 1058 |
%}. |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1059 |
self sender isNil ifTrue:[^ nil]. |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1060 |
|
69 | 1061 |
" |
360 | 1062 |
when we arrive here, something went wrong. |
69 | 1063 |
debugging ... |
1064 |
" |
|
360 | 1065 |
^ self invalidReturnOrRestartError:#restart with:nil |
1 | 1066 |
! |
1067 |
||
623 | 1068 |
resume |
1069 |
"resume execution in this context. I.e. as if the method called |
|
1070 |
last by the receiver did a ^ nil. |
|
1071 |
If the context has already returned, report an error. |
|
1072 |
||
1073 |
NOTICE: |
|
12841 | 1074 |
NO unwind actions are performed (see Context>>unwind). |
1075 |
||
1076 |
LIMITATION: |
|
1077 |
currently a context can only be resumed by |
|
1078 |
the owning process - not from outside. |
|
1079 |
Also, the compiler has an option (+optcontext) to create |
|
1080 |
non-resumable contexts (which are faster). |
|
1081 |
If such a context is restarted, a runtime error is raised." |
|
623 | 1082 |
|
1083 |
^ self resume:nil |
|
1084 |
! |
|
1085 |
||
1086 |
resume:value |
|
1087 |
"resume the receiver - as if it got 'value' from whatever |
|
1088 |
it called. This continues execution in the receivers method |
|
1089 |
after the point where it did its last send. |
|
12841 | 1090 |
If the context has already returned - report an error. |
623 | 1091 |
|
1092 |
NOTICE: |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1093 |
NO unwind actions are performed (see Context>>unwind:). |
623 | 1094 |
|
12841 | 1095 |
LIMITATION: |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1096 |
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
|
1097 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1098 |
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
|
1099 |
non-resumable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1100 |
If such a context is restarted, a runtime error is raised." |
623 | 1101 |
|
1668
41db5950f9ea
oops - con local variables are now renamed (last change in stc)
Claus Gittinger <cg@exept.de>
parents:
1492
diff
changeset
|
1102 |
|theContext| |
623 | 1103 |
|
1104 |
" |
|
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
1105 |
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
|
1106 |
(i.e. the one that I have called) and return from it. |
623 | 1107 |
" |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1108 |
|
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
1109 |
%{ |
4557 | 1110 |
OBJ sndr; |
1111 |
||
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
1112 |
theContext = __thisContext; |
4557 | 1113 |
while (theContext != nil) { |
1114 |
sndr = __ContextInstPtr(theContext)->c_sender; |
|
1115 |
if (sndr == self) break; |
|
1116 |
theContext = sndr; |
|
623 | 1117 |
} |
3508 | 1118 |
if (theContext != nil) { |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1119 |
if (__isLazy(theContext)) { |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1120 |
__PATCHUPCONTEXT(theContext); |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1121 |
} |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1122 |
} |
623 | 1123 |
%}. |
1124 |
||
1668
41db5950f9ea
oops - con local variables are now renamed (last change in stc)
Claus Gittinger <cg@exept.de>
parents:
1492
diff
changeset
|
1125 |
theContext isNil ifTrue:[ |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1126 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1127 |
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
|
1128 |
(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
|
1129 |
" |
4557 | 1130 |
^ thisContext invalidReturnOrRestartError:#'resume:' with:value |
623 | 1131 |
]. |
1668
41db5950f9ea
oops - con local variables are now renamed (last change in stc)
Claus Gittinger <cg@exept.de>
parents:
1492
diff
changeset
|
1132 |
^ theContext return:value |
623 | 1133 |
! |
1134 |
||
4557 | 1135 |
resumeIgnoringErrors:value |
1136 |
"resume the receiver - as if it got 'value' from whatever |
|
1137 |
it called. This continues execution in the receivers method |
|
1138 |
after the point where it did its last send. |
|
12841 | 1139 |
If the context has already returned - simply return. |
4557 | 1140 |
|
1141 |
NOTICE: |
|
1142 |
NO unwind actions are performed (see Context>>unwind:). |
|
1143 |
||
12841 | 1144 |
LIMITATION: |
4557 | 1145 |
currently a context can only be resumed by |
1146 |
the owning process - not from outside. |
|
1147 |
Also, the compiler has an option (+optcontext) to create |
|
1148 |
non-resumable contexts (which are faster). |
|
1149 |
If such a context is restarted, a runtime error is raised." |
|
1150 |
||
1151 |
" |
|
1152 |
starting with this context, find the one below |
|
1153 |
(i.e. the one that I have called) and return from it. |
|
1154 |
" |
|
1155 |
||
1156 |
%{ |
|
1157 |
OBJ theContext, sndr; |
|
1158 |
||
1159 |
theContext = __thisContext; |
|
1160 |
while (theContext != nil) { |
|
1161 |
sndr = __ContextInstPtr(theContext)->c_sender; |
|
1162 |
if (sndr == self) break; |
|
1163 |
theContext = sndr; |
|
1164 |
} |
|
1165 |
if (theContext != nil) { |
|
1166 |
if (__ContextInstPtr(theContext)->c_sender) { |
|
4635 | 1167 |
if (!((INT)(__ContextInstPtr(theContext)->c_flags) & __MASKSMALLINT(__CANNOT_RETURN))) { |
1168 |
__RESUMECONTEXT__(theContext, value, 0); |
|
1169 |
} |
|
4557 | 1170 |
} |
1171 |
} |
|
1172 |
%}. |
|
1173 |
||
1174 |
"/ no error reporting |
|
1175 |
! |
|
1176 |
||
1177 |
resumeOnErrorProceed:value |
|
1178 |
"resume the receiver - as if it got 'value' from whatever |
|
1179 |
it called. This continues execution in the receivers method |
|
1180 |
after the point where it did its last send. |
|
12841 | 1181 |
If the context has already returned - simply return. |
4557 | 1182 |
|
1183 |
NOTICE: |
|
1184 |
NO unwind actions are performed (see Context>>unwind:). |
|
1185 |
||
12841 | 1186 |
LIMITATION: |
4557 | 1187 |
currently a context can only be resumed by |
1188 |
the owning process - not from outside. |
|
1189 |
Also, the compiler has an option (+optcontext) to create |
|
1190 |
non-resumable contexts (which are faster). |
|
1191 |
If such a context is restarted, a runtime error is raised." |
|
1192 |
||
1193 |
" |
|
1194 |
starting with this context, find the one below |
|
1195 |
(i.e. the one that I have called) and return from it. |
|
1196 |
" |
|
1197 |
||
1198 |
%{ |
|
1199 |
OBJ theContext, sndr; |
|
1200 |
||
1201 |
theContext = __thisContext; |
|
1202 |
while (theContext != nil) { |
|
1203 |
sndr = __ContextInstPtr(theContext)->c_sender; |
|
1204 |
if (sndr == self) break; |
|
1205 |
theContext = sndr; |
|
1206 |
} |
|
1207 |
if (theContext != nil) { |
|
1208 |
if (__ContextInstPtr(theContext)->c_sender) { |
|
1209 |
__RESUMECONTEXT__(theContext, value, 0); |
|
1210 |
} |
|
1211 |
} |
|
1212 |
%}. |
|
1213 |
||
1214 |
"/ no error reporting |
|
1215 |
! |
|
1216 |
||
69 | 1217 |
return |
141 | 1218 |
"return from this context with nil. I.e. as if it did a ^ nil. |
1219 |
NOTICE: |
|
12841 | 1220 |
NO unwind actions are performed - this is usually not |
1221 |
what you want (See Context>>unwind). |
|
1222 |
This is a low level method - a helper for unwind. |
|
1223 |
||
1224 |
LIMITATION: |
|
1225 |
currently a context can only be returned by |
|
1226 |
the owning process - not from outside. |
|
1227 |
Also, the compiler has an option (+optcontext) to create |
|
1228 |
non-returnable contexts (which are faster). |
|
1229 |
If such a context is restarted, a runtime error is raised." |
|
141 | 1230 |
|
1231 |
^ self return:nil |
|
1 | 1232 |
! |
1233 |
||
69 | 1234 |
return:value |
1235 |
"return from this context as if it did a '^ value'. |
|
141 | 1236 |
NOTICE: |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1237 |
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
|
1238 |
what you want (See Context>>unwind:). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1239 |
This is a low level method - a helper for unwind. |
141 | 1240 |
|
12841 | 1241 |
LIMITATION: |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1242 |
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
|
1243 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1244 |
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
|
1245 |
non-returnable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1246 |
If such a context is restarted, a runtime error is raised." |
1 | 1247 |
|
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1248 |
%{ /* NOCONTEXT */ |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1249 |
if (__INST(sender_) != nil) { |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1250 |
__RESUMECONTEXT__(self, value, 0); |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1251 |
} |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1252 |
%}. |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1253 |
self sender isNil ifTrue:[^ nil]. |
1 | 1254 |
|
69 | 1255 |
" |
360 | 1256 |
when we arrive here, something went wrong. |
69 | 1257 |
debugging ... |
1258 |
" |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1259 |
^ self invalidReturnOrRestartError:#'return' with:value |
1 | 1260 |
! |
1261 |
||
328 | 1262 |
returnDoing:aBlock |
1263 |
"return from this context as if it did a '^ aBlock value'. |
|
1264 |
The block is evaluated as if called by the receiver context; |
|
1265 |
NOT the true executing context. |
|
1266 |
NOTICE: |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1267 |
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
|
1268 |
what you want (See Context>>unwindThenDo:). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1269 |
This is a low level method - a helper for unwind. |
328 | 1270 |
|
1271 |
LIMITATION: |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1272 |
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
|
1273 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1274 |
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
|
1275 |
non-returnable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1276 |
If such a context is restarted, a runtime error is raised." |
328 | 1277 |
|
12841 | 1278 |
%{ |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1279 |
if (__INST(sender_) != nil) { |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1280 |
__RESUMECONTEXT__(self, aBlock, 2); |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1281 |
} |
360 | 1282 |
%}. |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1283 |
self sender isNil ifTrue:[^ nil]. |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1284 |
|
328 | 1285 |
" |
360 | 1286 |
when we arrive here, something went wrong. |
328 | 1287 |
debugging ... |
1288 |
" |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1289 |
^ self invalidReturnOrRestartError:#'returnDoing' with:aBlock |
328 | 1290 |
! |
1291 |
||
1 | 1292 |
unwind |
69 | 1293 |
"return nil from the receiver - i.e. simulate a '^ nil'. |
11337 | 1294 |
If the context has already returned, report an error. |
1 | 1295 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
69 | 1296 |
and Block>>valueOnUnwindDo: on the way. |
1 | 1297 |
|
12841 | 1298 |
LIMITATION: |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1299 |
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
|
1300 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1301 |
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
|
1302 |
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
|
1303 |
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
|
1304 |
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
|
1305 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1306 |
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
|
1307 |
non-returnable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1308 |
If such a context is restarted, a runtime error is raised." |
141 | 1309 |
|
1310 |
^ self unwind:nil |
|
1 | 1311 |
! |
1312 |
||
1313 |
unwind:value |
|
69 | 1314 |
"return value from the receiver - i.e. simulate a '^ value'. |
360 | 1315 |
If the context has already returned , report an error. |
1 | 1316 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
69 | 1317 |
and Block>>valueOnUnwindDo: on the way. |
141 | 1318 |
|
12841 | 1319 |
LIMITATION: |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1320 |
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
|
1321 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1322 |
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
|
1323 |
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
|
1324 |
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
|
1325 |
context, by giving it an interrupt action - this does make sense. |
1 | 1326 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1327 |
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
|
1328 |
non-returnable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1329 |
If such a context is restarted, a runtime error is raised." |
1 | 1330 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1331 |
|con| |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1332 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1333 |
self senderIsNil ifFalse:[ |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1334 |
con := thisContext evaluateUnwindActionsUpTo:self. |
141 | 1335 |
]. |
1 | 1336 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1337 |
"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
|
1338 |
(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
|
1339 |
should we check for this situation first and NOT evaluate |
141 | 1340 |
the unwind actions in this case ?) |
1341 |
" |
|
69 | 1342 |
con isNil ifTrue:[ |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1343 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1344 |
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
|
1345 |
(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
|
1346 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1347 |
^ self invalidReturnOrRestartError:#'unwind:' with:value |
69 | 1348 |
]. |
141 | 1349 |
" |
1350 |
now, that all unwind-actions are done, I can use the |
|
1351 |
low-level return ... |
|
1352 |
" |
|
1353 |
^ self return:value |
|
1354 |
! |
|
1355 |
||
1356 |
unwindAndRestart |
|
1357 |
"restart the receiver - i.e. the method is evaluated again. |
|
402 | 1358 |
if the context to restart already died report an error. |
141 | 1359 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
1360 |
and Block>>valueOnUnwindDo: before restarting. |
|
1361 |
||
12841 | 1362 |
LIMITATION: |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1363 |
a context can only be restarted by |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1364 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1365 |
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
|
1366 |
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
|
1367 |
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
|
1368 |
context, by giving it an interrupt action - this does make sense. |
141 | 1369 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1370 |
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
|
1371 |
non-restartable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1372 |
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
|
1373 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1374 |
|con| |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1375 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1376 |
self senderIsNil ifFalse:[ |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1377 |
con := thisContext evaluateUnwindActionsUpTo:self. |
141 | 1378 |
]. |
1379 |
||
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1380 |
"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
|
1381 |
(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
|
1382 |
should we check for this situation first and NOT evaluate |
141 | 1383 |
the unwind actions in this case ?) |
1384 |
" |
|
1385 |
con isNil ifTrue:[ |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1386 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1387 |
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
|
1388 |
(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
|
1389 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1390 |
^ self invalidReturnOrRestartError:#'unwindAndRestart:' with:nil |
141 | 1391 |
]. |
1392 |
" |
|
1393 |
now, that all unwind-actions are done, I can use the |
|
1394 |
low-level restart ... |
|
1395 |
" |
|
1396 |
^ self restart |
|
328 | 1397 |
! |
1398 |
||
4485 | 1399 |
unwindAndResume:value |
1400 |
"resume execution in the the receiver - i.e. simulate a '^ value' |
|
1401 |
from whatever it called last. |
|
1402 |
If the context has already returned , report an error. |
|
1403 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
|
1404 |
and Block>>valueOnUnwindDo: on the way. |
|
1405 |
||
12841 | 1406 |
LIMITATION: |
4485 | 1407 |
currently a context can only be unwound by |
1408 |
the owning process - not from outside. |
|
1409 |
i.e. it is not possible for one thread to unwind |
|
1410 |
another threads context - which does not make sense anyway. |
|
1411 |
However, you can force another thread to do this in its own process |
|
1412 |
context, by giving it an interrupt action - this does make sense. |
|
1413 |
||
1414 |
Also, the compiler has an option (+optcontext) to create |
|
1415 |
non-returnable contexts (which are faster). |
|
1416 |
If such a context is restarted, a runtime error is raised." |
|
1417 |
||
1418 |
|con| |
|
1419 |
||
1420 |
self senderIsNil ifFalse:[ |
|
1421 |
con := thisContext evaluateUnwindActionsUpTo:self. |
|
1422 |
]. |
|
1423 |
||
1424 |
"oops, if nil, I am not on the calling chain; |
|
1425 |
(bad bad, unwind action have already been performed. |
|
1426 |
should we check for this situation first and NOT evaluate |
|
1427 |
the unwind actions in this case ?) |
|
1428 |
" |
|
1429 |
con isNil ifTrue:[ |
|
1430 |
" |
|
1431 |
tried to return to a context which is already dead |
|
1432 |
(i.e. the method/block has already executed a return) |
|
1433 |
" |
|
1434 |
^ self invalidReturnOrRestartError:#'unwindAndResume:' with:value |
|
1435 |
]. |
|
1436 |
" |
|
1437 |
now, that all unwind-actions are done, I can use the |
|
1438 |
low-level resume ... |
|
1439 |
" |
|
1440 |
^ self resume:value |
|
1441 |
! |
|
1442 |
||
12841 | 1443 |
unwindThenDo:aBlock |
328 | 1444 |
"return the value of aBlock from the receiver - i.e. simulate a '^ aBlock value'. |
360 | 1445 |
If the context has already returned , report an error. |
328 | 1446 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
1447 |
and Block>>valueOnUnwindDo: on the way. |
|
1448 |
The block is evaluated AFTER all unwind actions are performed |
|
1449 |
(i.e. the blocks sender will be the receiving context, not the |
|
402 | 1450 |
currently executing context) |
328 | 1451 |
|
12841 | 1452 |
LIMITATION: |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1453 |
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
|
1454 |
the owning process - not from outside |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1455 |
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
|
1456 |
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
|
1457 |
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
|
1458 |
context, by giving it an interrupt action - this does make sense. |
328 | 1459 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1460 |
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
|
1461 |
non-returnable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1462 |
If such a context is restarted, a runtime error is raised." |
328 | 1463 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1464 |
|con| |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1465 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1466 |
self senderIsNil ifFalse:[ |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1467 |
con := thisContext evaluateUnwindActionsUpTo:self. |
328 | 1468 |
]. |
1469 |
||
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1470 |
"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
|
1471 |
(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
|
1472 |
should we check for this situation first and NOT evaluate |
328 | 1473 |
the unwind actions in this case ?) |
1474 |
" |
|
1475 |
con isNil ifTrue:[ |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1476 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1477 |
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
|
1478 |
(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
|
1479 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1480 |
^ self invalidReturnOrRestartError:#'unwindThenDo:' with:aBlock |
328 | 1481 |
]. |
1482 |
" |
|
1483 |
now, that all unwind-actions are done, I can use the |
|
1484 |
low-level return ... |
|
1485 |
" |
|
12841 | 1486 |
^ self returnDoing:aBlock |
1 | 1487 |
! ! |
623 | 1488 |
|
1489 |
!Context methodsFor:'printing & storing'! |
|
1490 |
||
1070
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1491 |
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
|
1492 |
|
11539 | 1493 |
|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
|
1494 |
%{ |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1495 |
/* |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1496 |
* 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
|
1497 |
* 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
|
1498 |
* which may lead to sends to free objects. In normal operation, this 'cannot' happen. |
12841 | 1499 |
*/ |
1070
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1500 |
if (__isNonNilObject(someObject) && (__qClass(someObject)==nil)) { |
11539 | 1501 |
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
|
1502 |
} |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1503 |
%}. |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1504 |
name notNil ifTrue:[^ name]. |
11539 | 1505 |
s := someObject displayString. |
1506 |
s isNil ifTrue:[ |
|
12841 | 1507 |
^ '**************** nil displayString of ',(someObject class name ? '??') |
11539 | 1508 |
]. |
1509 |
^ 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
|
1510 |
! |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1511 |
|
623 | 1512 |
argsDisplayString |
1513 |
|fullString n "{ Class: SmallInteger }" | |
|
1514 |
||
1515 |
fullString := ''. |
|
1516 |
n := self numArgs. |
|
1517 |
1 to:n do:[:index | |
|
12841 | 1518 |
fullString := fullString , ' ' , (self argStringFor:(self at:index)) |
623 | 1519 |
]. |
1520 |
^ fullString |
|
1521 |
! |
|
1522 |
||
6648 | 1523 |
displayArgsOn:aStream |
1524 |
| n "{ Class: SmallInteger }" | |
|
1525 |
||
1526 |
n := self numArgs. |
|
1527 |
1 to:n do:[:index | |
|
1528 |
aStream nextPutAll:(self argStringFor:(self at:index)). |
|
8578 | 1529 |
aStream nextPutAll:' '. |
6648 | 1530 |
]. |
1531 |
! |
|
1532 |
||
623 | 1533 |
displayString |
12841 | 1534 |
"return a string describing the context - for display in Inspector" |
623 | 1535 |
|
1536 |
^ self class name , '(' , self printString , ')' |
|
1537 |
! |
|
1538 |
||
6648 | 1539 |
fullPrintAllOn:aStream |
12789 | 1540 |
"print a full walkback (incl arguments) starting at the receiver" |
6648 | 1541 |
|
1542 |
|context| |
|
1543 |
||
1544 |
context := self. |
|
1545 |
[context notNil] whileTrue: [ |
|
1546 |
context fullPrintOn:aStream. |
|
1547 |
aStream cr. |
|
1548 |
context := context sender |
|
1549 |
] |
|
1550 |
||
1551 |
" |
|
1552 |
thisContext fullPrintAllOn:Transcript |
|
1553 |
" |
|
1554 |
||
1555 |
"Created: 15.1.1997 / 18:09:05 / cg" |
|
1556 |
! |
|
1557 |
||
1558 |
fullPrintOn:aStream |
|
12789 | 1559 |
"append a verbose description (incl. arguments) of the receiver onto aStream" |
6648 | 1560 |
|
12841 | 1561 |
self receiverPrintString printOn:aStream. |
1562 |
aStream nextPutAll:' >> '. |
|
11311 | 1563 |
self selector printOn:aStream. "show as string (as symbol looks too ugly in browser ...)" |
1564 |
"/ self selector storeOn:aStream. "show as symbol" |
|
8578 | 1565 |
|
6648 | 1566 |
self size ~~ 0 ifTrue: [ |
12841 | 1567 |
aStream nextPutAll:' '. |
6648 | 1568 |
self displayArgsOn:aStream |
1569 |
]. |
|
12841 | 1570 |
aStream nextPutAll:' {'. |
1571 |
self identityHash printOn:aStream. |
|
1572 |
aStream nextPutAll:'}'. |
|
1573 |
||
1574 |
aStream nextPutAll:' ['. |
|
6648 | 1575 |
self lineNumber printOn:aStream. |
8578 | 1576 |
aStream nextPutAll:']'. |
6648 | 1577 |
|
1578 |
" |
|
1579 |
thisContext fullPrintOn:Transcript |
|
1580 |
" |
|
1581 |
||
1582 |
"Modified: 20.5.1996 / 10:27:14 / cg" |
|
1583 |
"Created: 15.1.1997 / 18:09:06 / cg" |
|
1584 |
! |
|
1585 |
||
623 | 1586 |
fullPrintString |
1587 |
"return a string describing the context - this includes the linenumber, |
|
1588 |
receiver printString and argument printString" |
|
1589 |
||
1590 |
|s| |
|
1591 |
||
1592 |
s := WriteStream on:String new. |
|
6648 | 1593 |
self fullPrintOn:s. |
623 | 1594 |
^ s contents |
1595 |
||
1596 |
" |
|
1597 |
thisContext fullPrintString |
|
1598 |
" |
|
1599 |
! |
|
1600 |
||
1601 |
methodPrintString |
|
12841 | 1602 |
"return a string describing the contexts method as 'implementorClass>>selector'" |
623 | 1603 |
|
1853
09cd1e8df9a2
use new Method>>who interface
Claus Gittinger <cg@exept.de>
parents:
1810
diff
changeset
|
1604 |
|mthd who| |
623 | 1605 |
|
1606 |
mthd := self method. |
|
1607 |
mthd notNil ifTrue:[ |
|
11306
c0c5c6a7054a
Print methods: Show message sends as Class >> #selector (with the #),
Stefan Vogel <sv@exept.de>
parents:
10943
diff
changeset
|
1608 |
who := mthd who. |
c0c5c6a7054a
Print methods: Show message sends as Class >> #selector (with the #),
Stefan Vogel <sv@exept.de>
parents:
10943
diff
changeset
|
1609 |
who notNil ifTrue:[ |
c0c5c6a7054a
Print methods: Show message sends as Class >> #selector (with the #),
Stefan Vogel <sv@exept.de>
parents:
10943
diff
changeset
|
1610 |
^ 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
|
1611 |
] |
623 | 1612 |
]. |
1613 |
^ mthd displayString. |
|
1614 |
||
1615 |
" |
|
12841 | 1616 |
thisContext methodPrintString |
1617 |
thisContext sender methodPrintString |
|
623 | 1618 |
" |
1853
09cd1e8df9a2
use new Method>>who interface
Claus Gittinger <cg@exept.de>
parents:
1810
diff
changeset
|
1619 |
|
09cd1e8df9a2
use new Method>>who interface
Claus Gittinger <cg@exept.de>
parents:
1810
diff
changeset
|
1620 |
"Modified: 1.11.1996 / 16:21:49 / cg" |
623 | 1621 |
! |
1622 |
||
12789 | 1623 |
printAllOn:aStream |
1624 |
"print a brief walkback (excl. arguments) starting at the receiver" |
|
1625 |
||
1626 |
|context| |
|
1627 |
||
1628 |
context := self. |
|
1629 |
[context notNil] whileTrue: [ |
|
1630 |
context printOn:aStream. |
|
1631 |
aStream cr. |
|
1632 |
context := context sender |
|
1633 |
] |
|
1634 |
||
1635 |
" |
|
1636 |
thisContext printAllOn:Transcript |
|
1637 |
" |
|
1638 |
||
1639 |
"Created: 15.1.1997 / 18:09:05 / cg" |
|
1640 |
! |
|
1641 |
||
623 | 1642 |
printOn:aStream |
12789 | 1643 |
"append a brief description (excl. arguments) of the receiver onto aStream" |
623 | 1644 |
|
1645 |
aStream nextPutAll:(self receiverPrintString). |
|
10549 | 1646 |
"/ aStream nextPutAll:' '. |
1647 |
aStream nextPutAll:' >> '. |
|
1648 |
||
1649 |
aStream bold. |
|
11310
830490e3ac43
dont use storeString of selector in #printOn:
Claus Gittinger <cg@exept.de>
parents:
11306
diff
changeset
|
1650 |
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
|
1651 |
"/ self selector storeOn:aStream. "show as symbol" |
10549 | 1652 |
aStream normal. |
4393 | 1653 |
aStream space. |
1654 |
aStream nextPutAll:' ['; nextPutAll:self lineNumber printString; nextPutAll:']' . |
|
1655 |
||
10549 | 1656 |
"Modified: / 21-05-2007 / 13:29:21 / cg" |
623 | 1657 |
! |
1658 |
||
1659 |
receiverPrintString |
|
12841 | 1660 |
"return a string describing the receiver of the context" |
623 | 1661 |
|
1662 |
|receiverClass receiverClassName newString implementorClass| |
|
1663 |
||
10549 | 1664 |
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
|
1665 |
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
|
1666 |
|
623 | 1667 |
receiverClass := receiver class. |
3923 | 1668 |
receiverClass isJavaClass ifTrue:[ |
1669 |
receiverClassName := receiverClass displayString |
|
1670 |
] ifFalse:[ |
|
1671 |
(receiverClass isBehavior |
|
12841 | 1672 |
and:[receiverClass isMeta |
3923 | 1673 |
and:[receiverClass soleInstance isJavaClass]]) ifTrue:[ |
1674 |
"/ receiverClassName := receiverClass soleInstance fullName. |
|
1675 |
receiverClassName := receiverClass name. |
|
1676 |
] ifFalse:[ |
|
1677 |
receiverClassName := receiverClass name. |
|
11311 | 1678 |
]. |
1679 |
[ |
|
1680 |
receiverClassName := receiverClass name. |
|
1681 |
]. []. |
|
3923 | 1682 |
]. |
6197 | 1683 |
(receiverClass == SmallInteger |
1684 |
or:[receiverClass == Float]) ifTrue:[ |
|
3923 | 1685 |
newString := '(' , receiver printString , ') ' , receiverClassName |
623 | 1686 |
] ifFalse:[ |
3923 | 1687 |
newString := receiverClassName |
623 | 1688 |
]. |
1689 |
||
1690 |
selector notNil ifTrue:[ |
|
1691 |
"/ implementorClass := self searchClass whichClassIncludesSelector:selector. |
|
1692 |
||
3923 | 1693 |
" |
1694 |
kludge to avoid slow search for containing class |
|
1695 |
" |
|
1696 |
(selector ~~ #doIt and:[selector ~~ #doIt:]) ifTrue:[ |
|
12841 | 1697 |
implementorClass := self methodClass. |
3923 | 1698 |
]. |
1699 |
||
1700 |
implementorClass notNil ifTrue: [ |
|
1701 |
(implementorClass ~~ receiverClass) ifTrue: [ |
|
10549 | 1702 |
"/ newString := newString , '>>>', implementorClass name printString |
1703 |
newString := newString,'(',implementorClass name printString,')' |
|
3923 | 1704 |
] |
1705 |
] ifFalse:[ |
|
1706 |
self searchClass ~~ receiverClass ifTrue:[ |
|
10549 | 1707 |
"/ newString := newString , '>>>' , self searchClass name |
1708 |
newString := newString,'(',self searchClass name,')' |
|
3923 | 1709 |
]. |
1710 |
" |
|
1711 |
kludge for doIt - these unbound methods are not |
|
1712 |
found in the classes methodDictionary |
|
1713 |
" |
|
1714 |
(selector ~~ #doIt and:[selector ~~ #doIt:]) ifTrue:[ |
|
10549 | 1715 |
"/ newString := newString , '>>>**NONE**' |
1716 |
newString := newString , '(**NONE**)' |
|
3923 | 1717 |
] |
1718 |
] |
|
623 | 1719 |
]. |
1720 |
||
1721 |
^ newString |
|
6197 | 1722 |
|
10549 | 1723 |
"Modified: / 21-05-2007 / 13:21:24 / cg" |
1724 |
! |
|
1725 |
||
1726 |
saveReceiverClassName |
|
1727 |
"return the receivers class-name string or nil, if the receiver is invalid. |
|
1728 |
This cares for invalid (free) objects which may appear with bad primitive code, |
|
1729 |
and prevents a crash in such a case." |
|
1730 |
||
1731 |
|receiverClassName| |
|
1732 |
||
1733 |
%{ |
|
1734 |
/* |
|
1735 |
* special handling for (invalid) free objects. |
|
1736 |
* these only appear if some primitiveCode does not correctly use SEND macros, |
|
1737 |
* which may lead to sends to free objects. In normal operation, this 'cannot' happen. |
|
12841 | 1738 |
*/ |
10549 | 1739 |
if (__isNonNilObject(__INST(receiver)) && (__qClass(__INST(receiver))==nil)) { |
1740 |
receiverClassName = __MKSTRING("FreeObject"); |
|
1741 |
} |
|
1742 |
%}. |
|
1743 |
^ receiverClassName |
|
1744 |
||
1745 |
"Created: / 21-05-2007 / 13:19:37 / cg" |
|
623 | 1746 |
! ! |
1747 |
||
7257 | 1748 |
!Context methodsFor:'private-accessing'! |
623 | 1749 |
|
11340
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1750 |
isMarkedForUnwind |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1751 |
"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
|
1752 |
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
|
1753 |
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
|
1754 |
|
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1755 |
%{ /* NOCONTEXT */ |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1756 |
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
|
1757 |
%} |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1758 |
" |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1759 |
thisContext isMarkedForUnwind |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1760 |
" |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1761 |
! |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1762 |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1763 |
markForHandle |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1764 |
"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
|
1765 |
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
|
1766 |
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
|
1767 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1768 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1769 |
__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
|
1770 |
%} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1771 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1772 |
"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
|
1773 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1774 |
|
753
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1775 |
markForInterrupt |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1776 |
"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
|
1777 |
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
|
1778 |
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
|
1779 |
|
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1780 |
%{ /* NOCONTEXT */ |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1781 |
__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
|
1782 |
%} |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1783 |
! |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1784 |
|
1727 | 1785 |
markForInterruptOnUnwind |
1786 |
"set the interrupt-on-unwind flag in the receiver. |
|
1787 |
The VM will generate a stepInterrupt, when this context returns or |
|
1788 |
is unwound. This is used by the debugger for faster single-stepping; |
|
1789 |
- a highly internal mechanism and not for public use." |
|
1790 |
||
1791 |
%{ /* NOCONTEXT */ |
|
3508 | 1792 |
__INST(flags) = (OBJ)((INT)__INST(flags) | __MASKSMALLINT(__IRQ_ON_UNWIND)); |
1727 | 1793 |
%} |
1794 |
! |
|
1795 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
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diff
changeset
|
1796 |
markForRaise |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1797 |
"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
|
1798 |
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
|
1799 |
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
|
1800 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1801 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1802 |
__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
|
1803 |
%} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1804 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1805 |
"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
|
1806 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1807 |
|
623 | 1808 |
markForUnwind |
749 | 1809 |
"set the mark for unwind flag in the receiver. |
1810 |
The VM needs this to know that some special action is to be performed with |
|
1811 |
this context - a highly internal mechanism and not for public use." |
|
1812 |
||
623 | 1813 |
%{ /* NOCONTEXT */ |
1133 | 1814 |
__INST(flags) = (OBJ)((INT)__INST(flags) | __MASKSMALLINT(__UNWIND_MARK)); |
623 | 1815 |
%} |
749 | 1816 |
|
1817 |
"Modified: 13.12.1995 / 19:05:22 / cg" |
|
623 | 1818 |
! |
1819 |
||
5780 | 1820 |
setHome:aContext |
1821 |
"set the homeContext. |
|
1822 |
DANGER: this is for experimental, internal use only (byteCode interpreters)" |
|
1823 |
||
1824 |
home := aContext. |
|
1825 |
! |
|
1826 |
||
1827 |
setSender:aContext |
|
1828 |
"set the sender of the context. |
|
1829 |
DANGER: this is for experimental, internal use only (byteCode interpreters)" |
|
1830 |
||
1831 |
%{ /* NOCONTEXT */ |
|
1832 |
__INST(sender_) = aContext; |
|
1833 |
%} |
|
1834 |
! |
|
1835 |
||
623 | 1836 |
unmarkForUnwind |
749 | 1837 |
"clear the mark for unwind flag in the receiver. |
1838 |
The VM needs this to know that some special action is to be performed with |
|
1839 |
this context - a highly internal mechanism and not for public use." |
|
1840 |
||
623 | 1841 |
%{ /* NOCONTEXT */ |
1133 | 1842 |
__INST(flags) = (OBJ)((INT)__INST(flags) & ~__MASKSMALLINT(__UNWIND_MARK)); |
623 | 1843 |
%} |
1844 |
! ! |
|
1845 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1846 |
!Context methodsFor:'searching'! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1847 |
|
8284 | 1848 |
findExceptional |
12841 | 1849 |
"walk along the sender chain (starting with the sender), |
8284 | 1850 |
for a context which is marked as handle or raise context. |
1851 |
This non-standard interface is only to be used by exception" |
|
1852 |
||
1853 |
"/ this could have been (actually: was) implemented as: |
|
1854 |
"/ |
|
1855 |
"/ |con| |
|
1856 |
"/ |
|
1857 |
"/ con := self. |
|
1858 |
"/ [con notNil] whileTrue:[ |
|
1859 |
"/ [con isHandleContext] ifTrue:[^con]. |
|
1860 |
"/ [con isRaiseContext] ifTrue:[^con]. |
|
1861 |
"/ con := con sender. |
|
1862 |
"/ ]. |
|
1863 |
"/ ^ nil |
|
1864 |
"/ |
|
1865 |
"/ and the code below does exactly this (somewhat faster, though). |
|
1866 |
"/ |
|
1867 |
"/ (it avoids referencing all intermediate contexts, which would mark them special, |
|
1868 |
"/ although they aren't really - this is expert knowledge, no need to understand that ...) |
|
1869 |
||
1870 |
%{ /* NOCONTEXT */ |
|
1871 |
||
1872 |
OBJ theContext; |
|
1873 |
||
1874 |
theContext = self; |
|
1875 |
while (__isNonNilObject(theContext)) { |
|
1876 |
if ((INT)(__ContextInstPtr(theContext)->c_flags) & __MASKSMALLINT(__HANDLE_MARK|__RAISE_MARK)) { |
|
1877 |
if (__isLazy(theContext)) { |
|
1878 |
__PATCHUPCONTEXT(theContext); |
|
1879 |
} |
|
1880 |
||
1881 |
if (! __isNonLIFO(theContext)) { |
|
12841 | 1882 |
/* |
1883 |
* to be prepared for the worst situation |
|
8284 | 1884 |
* (the sender is not stored, so the trap won't catch it) |
1885 |
* make the writeBarrier trigger manually. |
|
1886 |
* We'll see, if this is really required. |
|
1887 |
*/ |
|
1888 |
theContext->o_space |= CATCHMARK; |
|
1889 |
#if 0 |
|
1890 |
_markNonLIFO(theContext); |
|
1891 |
#endif |
|
1892 |
} |
|
1893 |
RETURN (theContext); |
|
1894 |
} |
|
1895 |
theContext = __ContextInstPtr(theContext)->c_sender; |
|
1896 |
} |
|
1897 |
%}. |
|
1898 |
^ nil |
|
1899 |
! |
|
1900 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1901 |
findNextContextWithSelector:selector1 or:selector2 or:selector3 |
12841 | 1902 |
"walk along the sender chain (starting with the sender), |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1903 |
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
|
1904 |
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
|
1905 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1906 |
"/ this could have been (actually: was) implemented as: |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
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diff
changeset
|
1907 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
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diff
changeset
|
1908 |
"/ |con| |
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 |
"/ con := self sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
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diff
changeset
|
1911 |
"/ [con notNil] whileTrue:[ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1912 |
"/ 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
|
1913 |
"/ con := con sender. |
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 |
"/ ^ nil |
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 |
"/ 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
|
1918 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1919 |
"/ (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
|
1920 |
"/ 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
|
1921 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1922 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
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diff
changeset
|
1923 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
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diff
changeset
|
1924 |
OBJ theContext; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
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diff
changeset
|
1925 |
OBJ sel; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
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diff
changeset
|
1926 |
OBJ __FETCHSELECTOR(); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
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diff
changeset
|
1927 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1928 |
theContext = __INST(sender_); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
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diff
changeset
|
1929 |
while (__isNonNilObject(theContext)) { |
5422 | 1930 |
if (__isLazy(theContext)) { |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
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diff
changeset
|
1931 |
#ifdef TRADITIONAL_STACK_FRAME |
5422 | 1932 |
sel = __FETCHSELECTOR(theContext); |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1933 |
#else |
5422 | 1934 |
/* mhmh - not really needed */ |
1935 |
__PATCHUPCONTEXT(theContext); |
|
1936 |
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
|
1937 |
#endif |
5422 | 1938 |
} else { |
1939 |
sel = __ContextInstPtr(theContext)->c_selector; |
|
1940 |
} |
|
1941 |
||
1942 |
if ((sel == selector1) |
|
1943 |
|| ((selector2 != nil) && (sel == selector2)) |
|
1944 |
|| ((selector3 != nil) && (sel == selector3))) { |
|
1945 |
if (__isLazy(theContext)) { |
|
1946 |
__PATCHUPCONTEXT(theContext); |
|
1947 |
} |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
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diff
changeset
|
1948 |
|
5422 | 1949 |
if (! __isNonLIFO(theContext)) { |
12841 | 1950 |
/* |
1951 |
* to be prepared for the worst situation |
|
5422 | 1952 |
* (the sender is not stored, so the trap wont catch it) |
1953 |
* make the writeBarrier trigger manually. |
|
1954 |
* We'll see, if this is really required. |
|
1955 |
*/ |
|
1956 |
theContext->o_space |= CATCHMARK; |
|
1957 |
_markNonLIFO(theContext); |
|
1958 |
} |
|
1959 |
RETURN (theContext); |
|
1960 |
} |
|
1961 |
theContext = __ContextInstPtr(theContext)->c_sender; |
|
1962 |
} |
|
1963 |
RETURN (nil); |
|
1964 |
%}. |
|
1965 |
" |
|
1966 |
|con sel| |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1967 |
|
5422 | 1968 |
con := self sender. |
1969 |
[con notNil] whileTrue:[ |
|
1970 |
sel := con selector. |
|
1971 |
sel == selector1 ifTrue:[^ con]. |
|
1972 |
(selector2 notNil and:[sel == selector2]) ifTrue:[^ con]. |
|
1973 |
(selector3 notNil and:[sel == selector3]) ifTrue:[^ con]. |
|
1974 |
con := con sender. |
|
1975 |
]. |
|
1976 |
^ nil |
|
1977 |
" |
|
4464
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 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1980 |
findNextUnwindContextOr:aContext |
12841 | 1981 |
"walk along the sender chain (starting at the sender), |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1982 |
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
|
1983 |
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
|
1984 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1985 |
"/ 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
|
1986 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1987 |
"/ |con| |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1988 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1989 |
"/ con := self sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1990 |
"/ [con notNil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1991 |
"/ and:[con ~~ aContext |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1992 |
"/ 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
|
1993 |
"/ ^ con |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1994 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1995 |
"/ 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
|
1996 |
"/ (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
|
1997 |
"/ 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
|
1998 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1999 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2000 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2001 |
OBJ theContext; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2002 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2003 |
if (self == aContext) { |
4485 | 2004 |
RETURN (self); |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2005 |
} |
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 |
theContext = __INST(sender_); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2008 |
while (__isNonNilObject(theContext)) { |
4485 | 2009 |
if ((theContext == aContext) |
2010 |
|| ((INT)(__ContextInstPtr(theContext)->c_flags) & __MASKSMALLINT(__UNWIND_MARK))) { |
|
2011 |
if (__isLazy(theContext)) { |
|
2012 |
__PATCHUPCONTEXT(theContext); |
|
2013 |
} |
|
2014 |
if (! __isNonLIFO(theContext)) { |
|
2015 |
/* |
|
2016 |
* to be prepared for the worst situation |
|
2017 |
* (the sender is not stored, so the trap wont catch it) |
|
2018 |
* make the writeBarrier trigger manually. |
|
2019 |
* We'll see, if this is really required. |
|
2020 |
*/ |
|
2021 |
theContext->o_space |= CATCHMARK; |
|
2022 |
#if 0 |
|
2023 |
_markNonLIFO(theContext); |
|
2024 |
#endif |
|
2025 |
} |
|
2026 |
RETURN (theContext); |
|
2027 |
} |
|
2028 |
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
|
2029 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2030 |
%}. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2031 |
^ nil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2032 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2033 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2034 |
findSpecialHandle:findHandleContext raise:findRaiseContext |
12841 | 2035 |
"walk along the sender chain (starting with the sender), |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2036 |
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
|
2037 |
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
|
2038 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2039 |
"/ 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
|
2040 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2041 |
"/ |con| |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2042 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2043 |
"/ con := self sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2044 |
"/ [con notNil] whileTrue:[ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2045 |
"/ (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
|
2046 |
"/ (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
|
2047 |
"/ con := con sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2048 |
"/ ]. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2049 |
"/ ^ nil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2050 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2051 |
"/ 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
|
2052 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2053 |
"/ (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
|
2054 |
"/ 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
|
2055 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2056 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2057 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2058 |
OBJ theContext; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2059 |
int flagMask = 0; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2060 |
INT mask; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2061 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2062 |
if (findHandleContext == true) |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2063 |
flagMask = __HANDLE_MARK; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2064 |
if (findRaiseContext == true) |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2065 |
flagMask |= __RAISE_MARK; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2066 |
|
12841 | 2067 |
mask = __MASKSMALLINT(flagMask); |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2068 |
theContext = __INST(sender_); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2069 |
while (__isNonNilObject(theContext)) { |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2070 |
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
|
2071 |
if (__isLazy(theContext)) { |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2072 |
__PATCHUPCONTEXT(theContext); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2073 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2074 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2075 |
if (! __isNonLIFO(theContext)) { |
12841 | 2076 |
/* |
2077 |
* to be prepared for the worst situation |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2078 |
* (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
|
2079 |
* 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
|
2080 |
* 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
|
2081 |
*/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2082 |
theContext->o_space |= CATCHMARK; |
4485 | 2083 |
#if 0 |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2084 |
_markNonLIFO(theContext); |
4485 | 2085 |
#endif |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2086 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2087 |
RETURN (theContext); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2088 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2089 |
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
|
2090 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2091 |
%}. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2092 |
^ nil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2093 |
! ! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2094 |
|
1051 | 2095 |
!Context methodsFor:'special accessing'! |
2096 |
||
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2097 |
argAndVarNames |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2098 |
"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
|
2099 |
|
12841 | 2100 |
|homeContext method block numArgs numVars m src |
8217 | 2101 |
sel isDoIt blocksLineNr extractFromBlock sender| |
7568
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 |
numArgs := self numArgs. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2104 |
numVars := self numVars. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2105 |
(numArgs == 0 and:[numVars == 0]) ifTrue:[^ #()]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2106 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2107 |
homeContext := self methodHome. |
7652 | 2108 |
homeContext notNil ifTrue:[ |
2109 |
sel := homeContext selector. |
|
2110 |
method := homeContext method. |
|
2111 |
]. |
|
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2112 |
|
12841 | 2113 |
extractFromBlock := |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2114 |
[ |
8772
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2115 |
|blockNode argNames varNames vars args blocksHome| |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2116 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2117 |
blockNode := Compiler |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2118 |
blockAtLine:blocksLineNr |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2119 |
in:m |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2120 |
orSource:src |
12841 | 2121 |
numArgs:numArgs |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2122 |
numVars:numVars. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2123 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2124 |
blockNode notNil ifTrue:[ |
8772
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2125 |
"/ a kludge |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2126 |
blockNode lineNumber == blocksLineNr ifTrue:[ |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2127 |
blocksHome := blockNode home. |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2128 |
(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
|
2129 |
(blocksHome numArgs == numArgs |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2130 |
and:[ blocksHome numVars == numVars ]) ifTrue:[ |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2131 |
blockNode := blocksHome |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2132 |
]. |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2133 |
]. |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2134 |
]. |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2135 |
|
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2136 |
argNames := #(). |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2137 |
varNames := #(). |
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 |
numArgs > 0 ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2140 |
vars := blockNode arguments. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2141 |
vars size > 0 ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2142 |
argNames := vars collect:[:var | var name] |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2143 |
] |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2144 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2145 |
numVars > 0 ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2146 |
vars := blockNode variables. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2147 |
vars size > 0 ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2148 |
varNames := vars collect:[:var | var name]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2149 |
] |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2150 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2151 |
^ argNames , varNames |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2152 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2153 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2154 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2155 |
"/ #doIt needs special handling below |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2156 |
isDoIt := (sel == #'doIt') or:[sel == #'doIt:']. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2157 |
self isBlockContext ifFalse:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2158 |
isDoIt ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2159 |
method notNil ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2160 |
"/ special for #doIt |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2161 |
m := nil. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2162 |
src := ('[' , method source , '\]') withCRs. |
8217 | 2163 |
"/ blocksLineNr := self lineNumber. |
8242
594cfd2150f7
oops - must care for doIt contexts
Claus Gittinger <cg@exept.de>
parents:
8217
diff
changeset
|
2164 |
blocksLineNr := (self home ? self) lineNumber. |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2165 |
extractFromBlock value. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2166 |
] |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2167 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2168 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2169 |
method notNil ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2170 |
^ method methodArgAndVarNames. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2171 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2172 |
^ #() |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2173 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2174 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2175 |
method notNil ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2176 |
isDoIt ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2177 |
"/ special for #doIt |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2178 |
"/ my source is found in the method. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2179 |
m := nil. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2180 |
src := ('[' , method source , '\]') withCRs. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2181 |
] ifFalse:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2182 |
m := method. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2183 |
src := nil. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2184 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2185 |
blocksLineNr := self lineNumber. |
8020 | 2186 |
extractFromBlock value. |
7747
27be5f627b03
fixed argAndVarNames for inner blocks.
Claus Gittinger <cg@exept.de>
parents:
7652
diff
changeset
|
2187 |
blocksLineNr := self home lineNumber. |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2188 |
extractFromBlock value. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2189 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2190 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2191 |
blocksLineNr isNil ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2192 |
self isBlockContext ifTrue:[ |
8217 | 2193 |
sender := self sender. |
2194 |
(sender notNil |
|
2195 |
and:[sender receiver isBlock |
|
2196 |
and:[sender selector startsWith:'value']]) |
|
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2197 |
ifTrue:[ |
8217 | 2198 |
block := sender receiver. |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2199 |
src := block source. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2200 |
src isNil ifTrue:[ |
8488 | 2201 |
self error:'no source'. |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2202 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2203 |
blocksLineNr := 1. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2204 |
extractFromBlock value. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2205 |
]. |
8217 | 2206 |
sender := nil. |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2207 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2208 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2209 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2210 |
^ #() |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2211 |
! |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2212 |
|
4557 | 2213 |
canResume |
2214 |
"return true, if the receiver allows to be resumed. |
|
2215 |
Due to the implementation, this requires that the context which |
|
2216 |
is right below the receiver is returnable." |
|
2217 |
||
2218 |
|theContext| |
|
2219 |
||
2220 |
" |
|
2221 |
starting with this context, find the one below |
|
2222 |
(i.e. the one that I have called) and return from it. |
|
2223 |
" |
|
2224 |
%{ |
|
2225 |
OBJ sndr; |
|
2226 |
||
2227 |
theContext = __thisContext; |
|
2228 |
while (theContext != nil) { |
|
2229 |
sndr = __ContextInstPtr(theContext)->c_sender; |
|
2230 |
if (sndr == self) break; |
|
2231 |
theContext = sndr; |
|
2232 |
} |
|
2233 |
if (theContext != nil) { |
|
2234 |
if (__isLazy(theContext)) { |
|
2235 |
__PATCHUPCONTEXT(theContext); |
|
2236 |
} |
|
2237 |
} |
|
2238 |
%}. |
|
2239 |
theContext isNil ifTrue:[ |
|
2240 |
^ false |
|
2241 |
]. |
|
2242 |
^ theContext canReturn |
|
2243 |
! |
|
2244 |
||
1051 | 2245 |
canReturn |
2246 |
"return true, if the receiver allows returning through it. |
|
4557 | 2247 |
Blocks, (currently) always return false. |
2646 | 2248 |
Methods which contain a (non-inlined) block are always |
2249 |
returnable - for other methods, it depends on how the system |
|
2250 |
was compiled (stc flag +/-optContext). |
|
2251 |
If it was compiled with +optContext, methods are compiled |
|
4557 | 2252 |
non returnable, unless a return-pragma was present in the method. |
2646 | 2253 |
Since this saves some administrative work in every method |
2254 |
invocation and makes overall execution faster, the system classes |
|
2255 |
are all compiled with this flag turned on." |
|
1051 | 2256 |
|
2257 |
%{ /* NOCONTEXT */ |
|
2258 |
||
3508 | 2259 |
RETURN ( ((INT)(__INST(flags)) & __MASKSMALLINT(__CANNOT_RETURN)) ? false : true ); |
5441 | 2260 |
%}. |
2261 |
^ true |
|
1051 | 2262 |
! |
2263 |
||
1492 | 2264 |
hasStackToShow |
2646 | 2265 |
"private interface to the debugger. |
2266 |
Smalltalk contexts return false here - other language frames |
|
2267 |
(i.e. Java frames) may want to show the evaluation stack" |
|
2268 |
||
1492 | 2269 |
^ false |
2270 |
||
2271 |
"Created: 28.6.1996 / 14:48:39 / cg" |
|
2646 | 2272 |
"Modified: 13.5.1997 / 16:31:12 / cg" |
1492 | 2273 |
! |
2274 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2275 |
isHandleContext |
4505 | 2276 |
"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
|
2277 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2278 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2279 |
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
|
2280 |
%} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2281 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2282 |
|
1051 | 2283 |
isNonLifo |
2646 | 2284 |
"return true, if this is a nonLifo context. |
2285 |
A nonLifo context is one that is still on the machine stack, |
|
2286 |
but has a reference taken and needs to be converted to a real |
|
2287 |
object (in objectMemory) when the method/block returns. |
|
2288 |
You dont have to understand this - this is a special ST/X |
|
2289 |
debug query, which may be removed without notice." |
|
1051 | 2290 |
|
2291 |
%{ /* NOCONTEXT */ |
|
1133 | 2292 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__NONLIFO)) ? true : false ); |
1051 | 2293 |
%} |
2294 |
! |
|
2295 |
||
2296 |
isOnMachineStack |
|
12841 | 2297 |
"return true, if this is a machine stack context as opposed to a |
2646 | 2298 |
real heap context. |
2299 |
You dont have to understand this - this is a special ST/X |
|
2300 |
debug query, which may be removed without notice." |
|
1051 | 2301 |
|
2302 |
%{ /* NOCONTEXT */ |
|
2303 |
RETURN ( (__qSpace(self) >= STACKSPACE) ? true : false ); |
|
2304 |
%} |
|
2305 |
! |
|
2306 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2307 |
isRaiseContext |
4505 | 2308 |
"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
|
2309 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2310 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2311 |
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
|
2312 |
%} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2313 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2314 |
|
1051 | 2315 |
isSpecial |
2316 |
"return true, if this is either a nonLifo or interrupted context" |
|
2317 |
||
2318 |
%{ /* NOCONTEXT */ |
|
1133 | 2319 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__SPECIAL)) ? true : false ); |
1051 | 2320 |
%} |
2321 |
! |
|
2322 |
||
2323 |
isUnwindContext |
|
2324 |
"return true, if this is an unwindContext" |
|
2325 |
||
2326 |
%{ /* NOCONTEXT */ |
|
1133 | 2327 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__UNWIND_MARK)) ? true : false ); |
1051 | 2328 |
%} |
8578 | 2329 |
! |
2330 |
||
2331 |
tempNames |
|
2332 |
"helper: given a context, return a collection of arg, var and temporary names" |
|
2333 |
||
2334 |
|names nTemps| |
|
2335 |
||
2336 |
names := self argAndVarNames. |
|
2337 |
(nTemps := self numTemps) > 0 ifTrue:[ |
|
2338 |
^ names , ((1 to:nTemps) collect:[:idx | '_tmp' , idx printString]). |
|
2339 |
]. |
|
2340 |
^ names. |
|
1051 | 2341 |
! ! |
2342 |
||
623 | 2343 |
!Context methodsFor:'testing'! |
2344 |
||
2345 |
isBlockContext |
|
2346 |
"return true, iff the receiver is a BlockContext, false otherwise" |
|
2347 |
||
2348 |
^ false |
|
2349 |
! |
|
2350 |
||
2351 |
isContext |
|
2352 |
"return true, iff the receiver is a Context, false otherwise" |
|
2353 |
||
2354 |
^ true |
|
2355 |
! |
|
2356 |
||
2357 |
isRecursive |
|
2358 |
"return true, if this context is one of a recursive send of the same |
|
1483 | 2359 |
selector to the same receiver before. |
2360 |
Here, different arguments are ignored - i.e. only the same method |
|
2361 |
counts for recursiveness. |
|
623 | 2362 |
Used to detect recursive errors or recursive printing - for example." |
2363 |
||
2291
af7652b82404
avoid touching contexts (making them nonLifo) when searching for unwind-contexts,
Claus Gittinger <cg@exept.de>
parents:
2285
diff
changeset
|
2364 |
|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
|
2365 |
|
af7652b82404
avoid touching contexts (making them nonLifo) when searching for unwind-contexts,
Claus Gittinger <cg@exept.de>
parents:
2285
diff
changeset
|
2366 |
count := 0. |
af7652b82404
avoid touching contexts (making them nonLifo) when searching for unwind-contexts,
Claus Gittinger <cg@exept.de>
parents:
2285
diff
changeset
|
2367 |
|
2893 | 2368 |
c := self findNextContextWithSelector:selector or:nil or:nil. |
623 | 2369 |
[c notNil] whileTrue:[ |
12841 | 2370 |
(c receiver == receiver) ifTrue:[ |
2371 |
" |
|
2372 |
stupid: the current ST/X context does not include |
|
2373 |
the method, but the class, in which the search started ... |
|
2374 |
" |
|
2375 |
myMethodsClass isNil ifTrue:[ |
|
2376 |
myMethodsClass := self methodClass. |
|
2377 |
]. |
|
2378 |
c methodClass == myMethodsClass ifTrue:[ |
|
2379 |
^ true |
|
2380 |
] |
|
2381 |
]. |
|
2382 |
c := c findNextContextWithSelector:selector or:nil or:nil. |
|
2383 |
||
2384 |
" |
|
2385 |
this special test was added to get out after a while |
|
2386 |
if the sender chain is corrupt - this gives us at least |
|
2387 |
a chance to find those errors. |
|
2388 |
" |
|
2389 |
count := count + 1. |
|
2390 |
count >= 100000 ifTrue:[ |
|
2391 |
'Context [warning]: bad context chain' errorPrintCR. |
|
2392 |
^ true |
|
2393 |
] |
|
623 | 2394 |
]. |
2395 |
^ false |
|
1483 | 2396 |
|
2135
6bd144c1c358
newStyle info & error messages
Claus Gittinger <cg@exept.de>
parents:
1853
diff
changeset
|
2397 |
"Modified: 10.1.1997 / 17:34:26 / cg" |
623 | 2398 |
! ! |
2399 |
||
1810 | 2400 |
!Context class methodsFor:'documentation'! |
749 | 2401 |
|
13426 | 2402 |
version_CVS |
13516
9bbdb9d05a51
changed: #deepCopyUsing:postCopySelector:
Claus Gittinger <cg@exept.de>
parents:
13473
diff
changeset
|
2403 |
^ '$Header: /cvs/stx/stx/libbasic/Context.st,v 1.162 2011-07-21 11:36:52 cg Exp $' |
12573 | 2404 |
! |
2405 |
||
13426 | 2406 |
version_SVN |
13472 | 2407 |
^ '§ Id: Context.st 10643 2011-06-08 21:53:07Z vranyj1 §' |
749 | 2408 |
! ! |
7257 | 2409 |
|
623 | 2410 |
Context initialize! |