author | Claus Gittinger <cg@exept.de> |
Sun, 09 Jun 2013 22:40:08 +0200 | |
changeset 15388 | 1b0f7426a7bb |
parent 15383 | 7a93ea4253de |
child 15644 | 6302ce0150b4 |
child 18066 | 89d51443ba6f |
permissions | -rw-r--r-- |
1 | 1 |
" |
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COPYRIGHT (c) 1988 by Claus Gittinger |
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All Rights Reserved |
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This software is furnished under a license and may be used |
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only in accordance with the terms of that license and with the |
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inclusion of the above copyright notice. This software may not |
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be provided or otherwise made available to, or used by, any |
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other person. No t itle to or ownership of the software is |
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hereby transferred. |
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" |
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"{ Package: 'stx:libbasic' }" |
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||
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Object variableSubclass:#Context |
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instanceVariableNames:'flags sender* home receiver selector searchClass method lineNr |
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retvalTemp handle*' |
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classVariableNames:'InvalidReturnSignal SingleStepInterruptRequest' |
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poolDictionaries:'' |
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category:'Kernel-Methods' |
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! |
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||
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!Context class methodsFor:'documentation'! |
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copyright |
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" |
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COPYRIGHT (c) 1988 by Claus Gittinger |
|
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All Rights Reserved |
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|
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This software is furnished under a license and may be used |
|
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only in accordance with the terms of that license and with the |
|
31 |
inclusion of the above copyright notice. This software may not |
|
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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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|
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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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||
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LineNumbers vs. program counter: |
69 |
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Due to the compilation to machine code, methods and/or block do not |
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always (actually: do seldom) contain bytecodes. Thus, there is no such concept |
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as a bytecode p-counter. To support debugging, the linenumber within the |
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original source is instead remembered when a send or loop entry is performed. |
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Since linenumbers are not always sufficient for debugging (multiple sends in one |
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line), this may be changed in future versions to a character offset, giving |
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the position of the selector in the source. |
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Restartable / Returnable contexts: |
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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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||
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Blockreturn from an outlived context (i.e. its home method has already returned) |
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is now rewarded by an invalidReturn exception - it used to be a noop in previous |
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releases (The blue book described this to be a noop, but other smalltalk implementations |
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changed this to be an invalid operation - good decision) |
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[instance variables:] |
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flags <SmallInteger> used by the VM; never touch. |
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contains info about number of args, |
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locals and temporaries. |
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|
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sender <Context> the 'calling / sending' context |
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This is not directly accessable, since it may |
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be a lazy context (i.e. an empty frame). |
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The #sender method cares for this. |
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home <Context> the context, where this block was |
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created, or nil if its a method context |
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There are also cheap blocks, which do |
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not need a reference to the home context, |
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for those, its nil too. |
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receiver <Object> the receiver of this message |
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selector <Symbol> the selector of this message |
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searchClass <Class> the class, where the message lookup started |
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(for super sends) or nil, for regular sends. |
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lineNr <SmallInteger> the position where the context left off |
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(kind of p-counter). Only the low 16bits |
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are valid. |
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retValTemp nil temporary - always nil, when you see the context |
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(used in the VM as temporary) |
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handle *noObject* used by the VM; not accessable, not an object |
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method the corresponding method |
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<indexed> arguments of the send followed by |
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locals of the method/block followed by |
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temporaries. |
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[errors:] |
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CannotReturnError raised when a block tries |
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to return ('^') from a method context |
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which itself has already returned |
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(i.e. there is no place to return to) |
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WARNING: layout and size known by the compiler and runtime system - do not change. |
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[author:] |
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Claus Gittinger |
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[see also:] |
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Block Process Method |
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( contexts, stacks & unwinding : programming/contexts.html) |
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" |
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! ! |
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!Context class methodsFor:'initialization'! |
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initialize |
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"/ InvalidReturnSignal isNil ifTrue:[ |
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"/ InvalidReturnSignal := ErrorSignal newSignalMayProceed:true. |
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"/ InvalidReturnSignal nameClass:self message:#invalidReturnSignal. |
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"/ InvalidReturnSignal notifierString:'invalid return; method cannot return twice'. |
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"/ |
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CannotReturnError notifierString:'invalid return; method cannot return twice'. |
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CannotResumeError notifierString:'invalid resume'. |
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SingleStepInterruptRequest isNil ifTrue:[ |
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SingleStepInterruptRequest := QuerySignal new. |
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SingleStepInterruptRequest nameClass:self message:#singleStepInterruptRequest. |
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SingleStepInterruptRequest notifierString:'single step'. |
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] |
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"Modified: 6.5.1996 / 16:46:03 / cg" |
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! ! |
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!Context class methodsFor:'Signal constants'! |
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cannotResumeSignal |
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"return the signal used when a method is tried to be resumed, which cannot" |
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^ CannotResumeError |
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! |
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cannotReturnSignal |
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"return the signal used when a method is tried to be returned twice |
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or, when some dead context is unwound or restarted." |
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^ CannotReturnError |
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! |
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||
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invalidReturnSignal |
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"return the signal used when a method is tried to be returned twice |
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or, when some dead context is unwound or restarted." |
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<resource: #obsolete> |
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self obsoleteMethodWarning:'use #cannotReturnSignal'. |
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^ self cannotReturnSignal. |
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! |
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singleStepInterruptRequest |
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"return the dummy query signal to ask for single stepping" |
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^ SingleStepInterruptRequest |
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"Created: 6.5.1996 / 16:46:32 / cg" |
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! ! |
217 |
||
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!Context class methodsFor:'error handling'! |
219 |
||
220 |
showWhereWeCameFrom |
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"show the stack backtrace: at least 4 levels, or until the first |
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send to a non-collection object (because we want to know, |
223 |
which non-collection send invoked a bad collection-method)." |
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|con count| |
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227 |
con := thisContext sender sender. |
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count := 0. |
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[ |
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(' from ' , con printString) errorPrintCR. |
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con := con sender. |
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count := count + 1. |
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] doWhile:[con notNil and:[count < 5 or:[con receiver isCollection]]]. |
234 |
"/ one more |
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con notNil ifTrue:[ |
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(' from ' , con printString) errorPrintCR. |
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]. |
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" |
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#() asSet add:nil |
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" |
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! ! |
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||
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!Context class methodsFor:'queries'! |
3 | 245 |
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isBuiltInClass |
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"return true if this class is known by the run-time-system. |
248 |
Here, true is returned." |
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^ true |
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"Modified: 23.4.1996 / 15:58:00 / cg" |
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! ! |
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||
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!Context class methodsFor:'special searching'! |
256 |
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findFirstSpecialHandle:searchForHandle raise:searchForRaise |
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|c| |
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||
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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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274 |
||
12573 | 275 |
!Context methodsFor:'Compatibility-Squeak'! |
276 |
||
277 |
longStack |
|
278 |
^ String streamContents:[:s | |
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self fullPrintAllOn:s |
|
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] |
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! ! |
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282 |
||
7261 | 283 |
!Context methodsFor:'Compatibility-VW'! |
5983 | 284 |
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285 |
resumeWith:value |
|
286 |
"same as #resume: - visualWorks compatibility" |
|
287 |
||
288 |
self resume:value |
|
289 |
! ! |
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290 |
||
623 | 291 |
!Context methodsFor:'accessing'! |
292 |
||
293 |
argAt:n |
|
294 |
"return the n'th argument" |
|
295 |
||
1726 | 296 |
n > self numArgs ifTrue:[ |
12841 | 297 |
^ self error:'invalid arg access' |
1726 | 298 |
]. |
623 | 299 |
^ self at:n |
1726 | 300 |
|
301 |
"Modified: 12.10.1996 / 21:44:28 / cg" |
|
623 | 302 |
! |
303 |
||
304 |
argAt:n put:value |
|
305 |
"set the n'th argument - useful when the receiver should be restarted" |
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154 | 306 |
|
1726 | 307 |
n > self numArgs ifTrue:[ |
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^ self error:'invalid arg access' |
1726 | 309 |
]. |
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self at:n put:value. |
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311 |
^ value |
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|
313 |
"Modified: 12.10.1996 / 21:44:32 / cg" |
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623 | 314 |
! |
315 |
||
316 |
args |
|
317 |
"return an array filled with the arguments of this context" |
|
318 |
||
319 |
|n| |
|
320 |
||
321 |
n := self numArgs. |
|
3130 | 322 |
n == 0 ifTrue:[ |
12841 | 323 |
"/ little optimization here - avaoid creating empty containers |
324 |
^ #() |
|
3130 | 325 |
]. |
623 | 326 |
^ (Array new:n) replaceFrom:1 to:n with:self. |
327 |
! |
|
154 | 328 |
|
623 | 329 |
argsAndVars |
330 |
"return an array filled with the arguments and variables of this context" |
|
331 |
||
332 |
|n| |
|
333 |
||
1810 | 334 |
n := self numArgs + self numVars. |
3130 | 335 |
n == 0 ifTrue:[ |
12841 | 336 |
"/ little optimization here - avoid creating empty containers |
337 |
^ #() |
|
3130 | 338 |
]. |
623 | 339 |
^ (Array new:n) replaceFrom:1 to:n with:self. |
1810 | 340 |
|
341 |
"Modified: 23.10.1996 / 16:19:41 / cg" |
|
623 | 342 |
! |
154 | 343 |
|
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argumentCount |
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"ANSI alias for numArgs: return the number of arguments to the Block/Method" |
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|
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347 |
%{ /* NOCONTEXT */ |
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348 |
|
8913 | 349 |
RETURN ( __mkSmallInteger( (__intVal(__INST(flags)) >> __NARG_SHIFT) & __NARG_MASK) ); |
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350 |
%} |
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351 |
! |
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352 |
|
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353 |
at:n put:value |
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|
354 |
super at:n put:value. |
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355 |
|
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|
356 |
"/ need some aid for optimized code - |
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|
357 |
"/ some machines have the arguments/receiver etc. kept in register vars ... |
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|
358 |
"/ the unfix updates the machine-stack version of the receiver. |
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|
359 |
%{ |
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|
360 |
__UNFIXCONTEXT(self, 0); |
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|
361 |
%}. |
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|
362 |
^ value |
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363 |
! |
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|
364 |
|
623 | 365 |
home |
366 |
"return the immediate home of the receiver. |
|
367 |
for block contexts, this is the methodcontext, where the block was created, |
|
368 |
for nested block contexts, its the surrounding blocks context. |
|
369 |
for method-contexts this is nil." |
|
25 | 370 |
|
623 | 371 |
^ nil "home" |
372 |
! |
|
1 | 373 |
|
3324
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
374 |
homeReceiver |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
375 |
"return the receiver from the context, where the receiver was defined" |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
376 |
|
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
377 |
^ receiver |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
378 |
|
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
379 |
"Created: / 5.3.1998 / 16:18:26 / stefan" |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
380 |
! |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
381 |
|
1 | 382 |
instVarAt:index |
69 | 383 |
"have to catch instVar access to retVal and handle - they are invalid. |
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| |
14225 | 514 |
|
515 |
(method notNil and:[method isMethod]) ifTrue:[ |
|
516 |
^ method |
|
517 |
]. |
|
518 |
||
519 |
"mhmh - maybe I am a context for an unbound method (as generated by doIt); |
|
520 |
look in the sender's context. Consider this a kludge. |
|
521 |
Future versions of ST/X's message lookup may store the method in |
|
522 |
the context. |
|
523 |
" |
|
524 |
sender := self sender. |
|
525 |
sender notNil ifTrue:[ |
|
526 |
sendersSelector := sender selector. |
|
527 |
sendersSelector notNil ifTrue:[ |
|
528 |
(sendersSelector startsWith:'valueWithReceiver:') ifTrue:[ |
|
529 |
m := sender receiver. |
|
530 |
m isMethod ifTrue:[ |
|
531 |
method := m. |
|
532 |
^ m |
|
533 |
] |
|
13426 | 534 |
] |
12853
3d15dcbe0057
added method-in-context slot.
Claus Gittinger <cg@exept.de>
parents:
12841
diff
changeset
|
535 |
] |
3d15dcbe0057
added method-in-context slot.
Claus Gittinger <cg@exept.de>
parents:
12841
diff
changeset
|
536 |
]. |
12841 | 537 |
|
325 | 538 |
c := self searchClass. |
539 |
" |
|
540 |
the below cannot happen in normal circumstances |
|
541 |
(added to avoid recursive errors in case of a broken sender chain) |
|
542 |
" |
|
543 |
c isBehavior ifFalse:[ |
|
12841 | 544 |
'Context [error]: non class in searchClass' errorPrintCR. |
545 |
' selector: ' errorPrint. selector errorPrint. |
|
546 |
' receiver: ' errorPrint. receiver errorPrintCR. |
|
547 |
^ nil |
|
325 | 548 |
]. |
549 |
||
328 | 550 |
c := c whichClassIncludesSelector:selector. |
1 | 551 |
c notNil ifTrue:[ |
12853
3d15dcbe0057
added method-in-context slot.
Claus Gittinger <cg@exept.de>
parents:
12841
diff
changeset
|
552 |
method := c compiledMethodAt:selector. |
3d15dcbe0057
added method-in-context slot.
Claus Gittinger <cg@exept.de>
parents:
12841
diff
changeset
|
553 |
^ method |
1 | 554 |
]. |
216 | 555 |
|
1 | 556 |
^ nil |
2135
6bd144c1c358
newStyle info & error messages
Claus Gittinger <cg@exept.de>
parents:
1853
diff
changeset
|
557 |
|
13426 | 558 |
"Modified: / 28-06-2011 / 20:23:05 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
14225 | 559 |
"Modified: / 20-07-2012 / 14:46:37 / cg" |
1 | 560 |
! |
561 |
||
212 | 562 |
methodClass |
563 |
"return the class in which the method for which the receiver was created is." |
|
564 |
||
1456 | 565 |
|cls m| |
566 |
||
12853
3d15dcbe0057
added method-in-context slot.
Claus Gittinger <cg@exept.de>
parents:
12841
diff
changeset
|
567 |
method notNil ifTrue:[ |
3d15dcbe0057
added method-in-context slot.
Claus Gittinger <cg@exept.de>
parents:
12841
diff
changeset
|
568 |
method isMethod ifTrue:[ |
3d15dcbe0057
added method-in-context slot.
Claus Gittinger <cg@exept.de>
parents:
12841
diff
changeset
|
569 |
^ method mclass |
3d15dcbe0057
added method-in-context slot.
Claus Gittinger <cg@exept.de>
parents:
12841
diff
changeset
|
570 |
] |
3d15dcbe0057
added method-in-context slot.
Claus Gittinger <cg@exept.de>
parents:
12841
diff
changeset
|
571 |
]. |
12841 | 572 |
|
1456 | 573 |
cls := self searchClass. |
3923 | 574 |
(cls isMeta |
575 |
and:[cls soleInstance isJavaClass]) ifTrue:[ |
|
576 |
cls := cls soleInstance |
|
577 |
]. |
|
1456 | 578 |
|
3923 | 579 |
[cls notNil] whileTrue:[ |
580 |
cls := cls whichClassIncludesSelector:selector. |
|
581 |
cls isNil ifTrue:[^ nil]. |
|
582 |
||
583 |
m := cls compiledMethodAt:selector. |
|
584 |
m notNil ifTrue:[ |
|
585 |
m isIgnored ifFalse:[^ cls]. |
|
586 |
]. |
|
587 |
cls := cls superclass |
|
1456 | 588 |
]. |
589 |
^ cls |
|
590 |
||
3923 | 591 |
"Modified: / 5.11.1998 / 19:07:43 / cg" |
212 | 592 |
! |
593 |
||
623 | 594 |
methodHome |
595 |
"return the method-home - for method contexts this is the receiver" |
|
596 |
||
597 |
^ self |
|
598 |
! |
|
599 |
||
15091 | 600 |
methodSelector |
601 |
"return the method's (or home method's) selector" |
|
602 |
||
603 |
^ self methodHome selector |
|
604 |
! |
|
605 |
||
623 | 606 |
ntemp |
607 |
"return the number of temporary variables of the Block/Method. |
|
1810 | 608 |
(for debugging only). |
609 |
I dont like the name of this method; its here for compatibility." |
|
623 | 610 |
|
1810 | 611 |
^ self numTemps |
612 |
||
613 |
"Modified: 23.10.1996 / 16:19:06 / cg" |
|
623 | 614 |
! |
615 |
||
616 |
numArgs |
|
617 |
"return the number of arguments to the Block/Method" |
|
618 |
||
619 |
%{ /* NOCONTEXT */ |
|
620 |
||
8913 | 621 |
RETURN ( __mkSmallInteger( (__intVal(__INST(flags)) >> __NARG_SHIFT) & __NARG_MASK) ); |
623 | 622 |
%} |
623 |
! |
|
624 |
||
1810 | 625 |
numTemps |
626 |
"return the number of temporary variables of the Block/Method. |
|
627 |
(for debugging only)" |
|
628 |
||
629 |
^ self size - self numArgs - self numVars |
|
630 |
||
631 |
"Created: 23.10.1996 / 16:19:10 / cg" |
|
632 |
"Modified: 23.10.1996 / 16:19:48 / cg" |
|
633 |
! |
|
634 |
||
635 |
numVars |
|
623 | 636 |
"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
|
637 |
|
623 | 638 |
%{ /* NOCONTEXT */ |
639 |
||
8913 | 640 |
RETURN ( __mkSmallInteger( (__intVal(__INST(flags)) >> __NVAR_SHIFT) & __NVAR_MASK) ); |
623 | 641 |
%} |
642 |
! |
|
643 |
||
1810 | 644 |
nvars |
645 |
"return the number of local variables of the Block/Method. |
|
646 |
I dont like the name of this method; its here for compatibility." |
|
647 |
||
648 |
^ self numVars |
|
649 |
||
650 |
"Modified: 23.10.1996 / 16:18:44 / cg" |
|
651 |
! |
|
652 |
||
13426 | 653 |
programmingLanguage |
654 |
||
13543
63c783128bae
changed: #programmingLanguage
Claus Gittinger <cg@exept.de>
parents:
13519
diff
changeset
|
655 |
^method notNil |
63c783128bae
changed: #programmingLanguage
Claus Gittinger <cg@exept.de>
parents:
13519
diff
changeset
|
656 |
ifTrue:[method programmingLanguage] |
63c783128bae
changed: #programmingLanguage
Claus Gittinger <cg@exept.de>
parents:
13519
diff
changeset
|
657 |
ifFalse:[SmalltalkLanguage instance] |
13426 | 658 |
|
659 |
"Created: / 17-03-2011 / 10:17:14 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
|
13543
63c783128bae
changed: #programmingLanguage
Claus Gittinger <cg@exept.de>
parents:
13519
diff
changeset
|
660 |
"Modified (format): / 02-08-2011 / 09:23:39 / cg" |
13426 | 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 |
|
15232 | 721 |
* (the sender is not stored, so the trap won't catch it) |
12841 | 722 |
* make the writeBarrier trigger manually. |
723 |
* We'll see, if this is really required. |
|
724 |
*/ |
|
725 |
theContext->o_space |= CATCHMARK; |
|
15232 | 726 |
__markNonLIFO(theContext); |
12841 | 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 |
15319 | 734 |
"return true, if I have no sender. |
735 |
This little ugly piece of code is needed (instead of the obvious |
|
736 |
'sender isNil') because sender is a protected field, which cannot be |
|
737 |
directly accessed by smalltalk code. The reason is that the sender field |
|
738 |
is lazily filled in by the VM, in the sender-accessor, and is usually |
|
739 |
invalid until needed." |
|
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
740 |
|
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
741 |
%{ /* NOCONTEXT */ |
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
742 |
if ( __INST(sender_) == nil ) { |
5422 | 743 |
RETURN (true); |
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
744 |
} |
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
745 |
RETURN (false); |
5422 | 746 |
%}. |
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
747 |
! |
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
748 |
|
623 | 749 |
setLineNumber:aNumber |
750 |
"private entry for uncompiledCodeObject ..." |
|
1 | 751 |
|
623 | 752 |
lineNr := aNumber |
340 | 753 |
! |
754 |
||
5749 | 755 |
setNumArgs:nA numVars:nV |
756 |
"set the number of arguments and variables" |
|
757 |
||
758 |
%{ /* NOCONTEXT */ |
|
8910 | 759 |
INT flg; |
5749 | 760 |
|
761 |
flg = __intVal(__INST(flags)); |
|
762 |
flg = flg & ~(__NARG_MASK << __NARG_SHIFT); |
|
763 |
flg = flg & ~(__NVAR_MASK << __NVAR_SHIFT); |
|
764 |
flg = flg | __intVal(nA) << __NARG_SHIFT; |
|
765 |
flg = flg | __intVal(nV) << __NVAR_SHIFT; |
|
8913 | 766 |
__INST(flags) = __mkSmallInteger(flg); |
5749 | 767 |
%} |
768 |
! |
|
769 |
||
12841 | 770 |
tempAt:index |
8578 | 771 |
"return the n'th stack-temporary variable" |
772 |
||
773 |
^ self at:index |
|
774 |
! |
|
775 |
||
12841 | 776 |
temporaries |
202 | 777 |
"return an array filled with the temporaries of this context" |
778 |
||
308 | 779 |
|nonTemps mySize| |
202 | 780 |
|
1810 | 781 |
nonTemps := self numArgs + self numVars. |
782 |
mySize := self numTemps. |
|
3130 | 783 |
mySize == 0 ifTrue:[ |
12841 | 784 |
"/ little optimization here - avaoid creating empty containers |
785 |
^ #() |
|
3130 | 786 |
]. |
308 | 787 |
^ (Array new:mySize) replaceFrom:1 to:mySize with:self startingAt:nonTemps+1 |
1810 | 788 |
|
789 |
"Modified: 23.10.1996 / 16:20:00 / cg" |
|
202 | 790 |
! |
791 |
||
10 | 792 |
varAt:n |
793 |
"return the n'th local variable" |
|
794 |
||
154 | 795 |
^ self at:(n + self numArgs) |
10 | 796 |
! |
797 |
||
798 |
varAt:n put:value |
|
799 |
"set the n'th local variable - useful when the receiver should be restarted |
|
54 | 800 |
or continued" |
10 | 801 |
|
154 | 802 |
self at:(n + self numArgs) put:value |
10 | 803 |
! |
804 |
||
12841 | 805 |
vars |
623 | 806 |
"return an array filled with the local variables of this context" |
375 | 807 |
|
623 | 808 |
|nonVars mySize| |
360 | 809 |
|
623 | 810 |
nonVars := self numArgs. |
1810 | 811 |
mySize := self numVars. |
3130 | 812 |
mySize == 0 ifTrue:[ |
12841 | 813 |
"/ little optimization here - avaoid creating empty containers |
814 |
^ #() |
|
3130 | 815 |
]. |
623 | 816 |
^ (Array new:mySize) replaceFrom:1 to:mySize with:self startingAt:nonVars+1 |
1810 | 817 |
|
818 |
"Modified: 23.10.1996 / 16:20:06 / cg" |
|
1 | 819 |
! ! |
820 |
||
623 | 821 |
!Context methodsFor:'copying'! |
415 | 822 |
|
10943 | 823 |
deepCopyUsing:aDictionary postCopySelector:postCopySelector |
10136 | 824 |
|copyOfMe| |
3350
40dc4807a6d4
must catch #deppCopyUsing: instead of #deepCopy.
Claus Gittinger <cg@exept.de>
parents:
3324
diff
changeset
|
825 |
|
10136 | 826 |
copyOfMe := self shallowCopy. |
827 |
copyOfMe setSender:nil. |
|
13516
9bbdb9d05a51
changed: #deepCopyUsing:postCopySelector:
Claus Gittinger <cg@exept.de>
parents:
13473
diff
changeset
|
828 |
copyOfMe perform:postCopySelector withOptionalArgument:self and:aDictionary. |
10136 | 829 |
^ copyOfMe |
830 |
||
831 |
"Created: / 31-03-1998 / 15:51:14 / cg" |
|
13516
9bbdb9d05a51
changed: #deepCopyUsing:postCopySelector:
Claus Gittinger <cg@exept.de>
parents:
13473
diff
changeset
|
832 |
"Modified: / 21-07-2011 / 13:30:21 / cg" |
1 | 833 |
! ! |
834 |
||
15010 | 835 |
!Context methodsFor:'enumerating'! |
836 |
||
837 |
withAllSendersDo:aBlock |
|
838 |
"evaluate aBlock for me and all contexts of my sender chain" |
|
839 |
||
840 |
|con| |
|
841 |
||
842 |
con := self. |
|
843 |
[ con notNil ] whileTrue:[ |
|
844 |
aBlock value:con. |
|
845 |
con := con sender. |
|
846 |
] |
|
847 |
! ! |
|
848 |
||
77 | 849 |
!Context methodsFor:'error handling'! |
850 |
||
851 |
invalidReturn:returnValue |
|
852 |
"this message is sent by the VM, when a methods context |
|
853 |
which has already returned is about to return again. |
|
854 |
(i.e. about to execute a return from an already returned |
|
105 | 855 |
method in a block). |
141 | 856 |
We raise a signal here, to allow catching of that situation." |
77 | 857 |
|
406 | 858 |
" |
859 |
in previous versions of ST/X and ST-80, this was no error; |
|
860 |
(instead, a normal blockreturn was performed to the value-sender). |
|
861 |
From a note in comp.lang.smalltalk, I conclude that new ST-80 versions |
|
862 |
now raise an error if this happens. |
|
863 |
Comment out the raise below to get that (old) behavior |
|
864 |
BETTER REWRITE YOUR APPLICATION |
|
12841 | 865 |
" |
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
866 |
"/ old behavior: |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
867 |
"/ ^ returnValue |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
868 |
|
282 | 869 |
"/ new behavior: |
870 |
||
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
871 |
"/ 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
|
872 |
"/ use another error message. |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
873 |
|
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
874 |
(home notNil and:[home sender notNil]) ifTrue:[ |
12841 | 875 |
^ CannotReturnError |
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
876 |
raiseRequestWith:returnValue |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
877 |
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
|
878 |
]. |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
879 |
|
12841 | 880 |
^ CannotReturnError |
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
881 |
raiseRequestWith:returnValue. |
282 | 882 |
|
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
883 |
"Modified: / 2.2.1998 / 15:19:52 / cg" |
406 | 884 |
! |
885 |
||
886 |
invalidReturnOrRestart:returnValue |
|
15268 | 887 |
"this message is sent by the VM, when a method's or block's context |
888 |
which was compiled non-returnable is about to return again, |
|
889 |
or a non-restartable context is tried to be restarted. |
|
890 |
In ST/X, not all contexts are restartable/returnable. |
|
406 | 891 |
We raise a signal here, to allow catching of that situation." |
892 |
||
6002 | 893 |
^ CannotReturnError |
894 |
raiseRequestWith:returnValue |
|
895 |
errorString:'method was compiled non-resumable' |
|
360 | 896 |
! |
897 |
||
898 |
invalidReturnOrRestartError:how with:value |
|
899 |
"common error reporter for restart/return errors" |
|
12841 | 900 |
|
360 | 901 |
self canReturn ifTrue:[ |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
902 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
903 |
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
|
904 |
(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
|
905 |
" |
12841 | 906 |
^ CannotReturnError |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
907 |
raiseRequestWith:value |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
908 |
errorString:(how , ' context not on calling chain') |
360 | 909 |
]. |
910 |
" |
|
911 |
tried to return from/restart a context of a method which was compiled |
|
912 |
unrestartable or of a block (which is never restartable) |
|
913 |
" |
|
12841 | 914 |
^ CannotReturnError |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
915 |
raiseRequestWith:value |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
916 |
errorString:(how , ' context cannot be restarted/returned from') |
77 | 917 |
! ! |
918 |
||
6404 | 919 |
!Context methodsFor:'fixups'! |
920 |
||
921 |
fixAllLineNumbers |
|
922 |
%{ |
|
923 |
__PATCHUPCONTEXTS(__thisContext); |
|
6424 | 924 |
__CONTEXTLINENOS(self); |
6404 | 925 |
%} |
926 |
! ! |
|
927 |
||
623 | 928 |
!Context methodsFor:'minidebugger printing'! |
929 |
||
930 |
fullPrint |
|
12841 | 931 |
"print the receiver, selector and args of the context |
623 | 932 |
- used only for MiniDebuggers walkback print" |
933 |
||
934 |
self receiverPrintString print. ' ' print. selector print. |
|
935 |
self size ~~ 0 ifTrue: [ |
|
12841 | 936 |
' ' print. self argsDisplayString print |
623 | 937 |
]. |
1426 | 938 |
' [' print. self lineNumber print. ']' printCR |
623 | 939 |
|
940 |
" |
|
941 |
thisContext fullPrint |
|
942 |
" |
|
1426 | 943 |
|
944 |
"Modified: 20.5.1996 / 10:27:14 / cg" |
|
623 | 945 |
! |
946 |
||
947 |
fullPrintAll |
|
948 |
"print a full walkback starting at the receiver |
|
949 |
- used only for MiniDebuggers walkback print" |
|
950 |
||
15010 | 951 |
self withAllSendersDo:[:con | con fullPrint]. |
623 | 952 |
|
953 |
" |
|
954 |
thisContext fullPrintAll |
|
955 |
" |
|
2173 | 956 |
! |
957 |
||
4674 | 958 |
fullPrintAllLevels:nOrNil |
959 |
"print a full walkback starting at the receiver, only print n levels |
|
960 |
- used only for MiniDebuggers walkback print" |
|
961 |
||
962 |
|context count| |
|
963 |
||
964 |
count := 0. |
|
965 |
context := self. |
|
966 |
[context notNil] whileTrue: [ |
|
967 |
context fullPrint. |
|
968 |
context := context sender. |
|
5911 | 969 |
nOrNil notNil ifTrue:[ |
4674 | 970 |
(count := count+1) > nOrNil ifTrue:[^self]. |
971 |
] |
|
972 |
] |
|
973 |
||
974 |
" |
|
6648 | 975 |
thisContext fullPrintAllLevels:5 |
4674 | 976 |
" |
977 |
||
978 |
"Created: / 3.9.1999 / 14:02:38 / ps" |
|
11540 | 979 |
! |
980 |
||
11542 | 981 |
printAll |
982 |
"print a full walkback starting at the receiver, only print n levels |
|
983 |
- used only for MiniDebuggers walkback print" |
|
984 |
||
985 |
self printAllLevels:nil |
|
986 |
||
987 |
" |
|
988 |
thisContext printAll |
|
989 |
" |
|
990 |
! |
|
991 |
||
11540 | 992 |
printAllLevels:nOrNil |
993 |
"print a full walkback starting at the receiver, only print n levels |
|
994 |
- used only for MiniDebuggers walkback print" |
|
995 |
||
996 |
|context count| |
|
997 |
||
998 |
count := 0. |
|
999 |
context := self. |
|
11544 | 1000 |
'--------------------------' printCR. |
11540 | 1001 |
[context notNil] whileTrue: [ |
1002 |
context printCR. |
|
1003 |
context := context sender. |
|
1004 |
nOrNil notNil ifTrue:[ |
|
11543 | 1005 |
(count := count+1) > nOrNil ifTrue:[ |
1006 |
'--------------------------' printCR. |
|
12841 | 1007 |
^ self |
11543 | 1008 |
]. |
11540 | 1009 |
] |
11545 | 1010 |
]. |
1011 |
'--------------------------' printCR. |
|
11540 | 1012 |
|
1013 |
" |
|
1014 |
thisContext printAllLevels:5 |
|
1015 |
" |
|
623 | 1016 |
! ! |
1017 |
||
1 | 1018 |
!Context methodsFor:'non local control flow'! |
1019 |
||
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1020 |
evaluateUnwindActionsUpTo:aContext |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1021 |
"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
|
1022 |
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
|
1023 |
marked using #markForUnwind. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1024 |
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
|
1025 |
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
|
1026 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1027 |
|con unwindBlock| |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1028 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1029 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1030 |
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
|
1031 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1032 |
con := self findNextUnwindContextOr:aContext. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1033 |
[con notNil and:[con ~~ aContext]] whileTrue:[ |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1034 |
unwindBlock := con receiver unwindHandlerInContext:con. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1035 |
con unmarkForUnwind. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1036 |
unwindBlock value. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1037 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1038 |
con := con findNextUnwindContextOr:aContext. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1039 |
]. |
11340
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1040 |
"/ 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
|
1041 |
(con notNil and:[con isMarkedForUnwind]) ifTrue:[ |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1042 |
unwindBlock := con receiver unwindHandlerInContext:con. |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1043 |
con unmarkForUnwind. |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1044 |
unwindBlock value. |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1045 |
]. |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1046 |
^ con |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1047 |
! |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1048 |
|
1 | 1049 |
restart |
1050 |
"restart the receiver - i.e. the method is evaluated again. |
|
402 | 1051 |
if the context to restart already died, trigger an error. |
141 | 1052 |
This is a low level helper for unwindAndRestart. |
1053 |
||
12841 | 1054 |
NOTICE: |
1055 |
NO unwind actions are performed - this is usually not |
|
1056 |
what you want (see Context>>unwindAndRestart). |
|
1057 |
||
1058 |
LIMITATION: |
|
1059 |
currently a context can only be restarted by |
|
1060 |
the owning process - not from outside. |
|
1061 |
Also, the compiler has an option (+optcontext) to create |
|
1062 |
non-restartable contexts (which are faster). |
|
1063 |
If such a context is restarted, a runtime error is raised." |
|
1 | 1064 |
|
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1065 |
%{ /* NOCONTEXT */ |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1066 |
if (__INST(sender_) != nil) { |
12841 | 1067 |
__RESUMECONTEXT__(self, RESTART_VALUE, 0); |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1068 |
} |
360 | 1069 |
%}. |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1070 |
self sender isNil ifTrue:[^ nil]. |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1071 |
|
69 | 1072 |
" |
360 | 1073 |
when we arrive here, something went wrong. |
69 | 1074 |
debugging ... |
1075 |
" |
|
360 | 1076 |
^ self invalidReturnOrRestartError:#restart with:nil |
1 | 1077 |
! |
1078 |
||
623 | 1079 |
resume |
1080 |
"resume execution in this context. I.e. as if the method called |
|
1081 |
last by the receiver did a ^ nil. |
|
1082 |
If the context has already returned, report an error. |
|
1083 |
||
1084 |
NOTICE: |
|
12841 | 1085 |
NO unwind actions are performed (see Context>>unwind). |
1086 |
||
1087 |
LIMITATION: |
|
1088 |
currently a context can only be resumed by |
|
1089 |
the owning process - not from outside. |
|
1090 |
Also, the compiler has an option (+optcontext) to create |
|
1091 |
non-resumable contexts (which are faster). |
|
1092 |
If such a context is restarted, a runtime error is raised." |
|
623 | 1093 |
|
1094 |
^ self resume:nil |
|
1095 |
! |
|
1096 |
||
1097 |
resume:value |
|
1098 |
"resume the receiver - as if it got 'value' from whatever |
|
1099 |
it called. This continues execution in the receivers method |
|
1100 |
after the point where it did its last send. |
|
12841 | 1101 |
If the context has already returned - report an error. |
623 | 1102 |
|
1103 |
NOTICE: |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1104 |
NO unwind actions are performed (see Context>>unwind:). |
623 | 1105 |
|
12841 | 1106 |
LIMITATION: |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1107 |
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
|
1108 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1109 |
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
|
1110 |
non-resumable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1111 |
If such a context is restarted, a runtime error is raised." |
623 | 1112 |
|
1668
41db5950f9ea
oops - con local variables are now renamed (last change in stc)
Claus Gittinger <cg@exept.de>
parents:
1492
diff
changeset
|
1113 |
|theContext| |
623 | 1114 |
|
1115 |
" |
|
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
1116 |
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
|
1117 |
(i.e. the one that I have called) and return from it. |
623 | 1118 |
" |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1119 |
|
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
1120 |
%{ |
4557 | 1121 |
OBJ sndr; |
1122 |
||
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
1123 |
theContext = __thisContext; |
4557 | 1124 |
while (theContext != nil) { |
1125 |
sndr = __ContextInstPtr(theContext)->c_sender; |
|
1126 |
if (sndr == self) break; |
|
1127 |
theContext = sndr; |
|
623 | 1128 |
} |
3508 | 1129 |
if (theContext != nil) { |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1130 |
if (__isLazy(theContext)) { |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1131 |
__PATCHUPCONTEXT(theContext); |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1132 |
} |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1133 |
} |
623 | 1134 |
%}. |
1135 |
||
1668
41db5950f9ea
oops - con local variables are now renamed (last change in stc)
Claus Gittinger <cg@exept.de>
parents:
1492
diff
changeset
|
1136 |
theContext isNil ifTrue:[ |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1137 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1138 |
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
|
1139 |
(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
|
1140 |
" |
4557 | 1141 |
^ thisContext invalidReturnOrRestartError:#'resume:' with:value |
623 | 1142 |
]. |
1668
41db5950f9ea
oops - con local variables are now renamed (last change in stc)
Claus Gittinger <cg@exept.de>
parents:
1492
diff
changeset
|
1143 |
^ theContext return:value |
623 | 1144 |
! |
1145 |
||
4557 | 1146 |
resumeIgnoringErrors:value |
1147 |
"resume the receiver - as if it got 'value' from whatever |
|
1148 |
it called. This continues execution in the receivers method |
|
1149 |
after the point where it did its last send. |
|
12841 | 1150 |
If the context has already returned - simply return. |
4557 | 1151 |
|
1152 |
NOTICE: |
|
1153 |
NO unwind actions are performed (see Context>>unwind:). |
|
1154 |
||
12841 | 1155 |
LIMITATION: |
4557 | 1156 |
currently a context can only be resumed by |
1157 |
the owning process - not from outside. |
|
1158 |
Also, the compiler has an option (+optcontext) to create |
|
1159 |
non-resumable contexts (which are faster). |
|
1160 |
If such a context is restarted, a runtime error is raised." |
|
1161 |
||
1162 |
" |
|
1163 |
starting with this context, find the one below |
|
1164 |
(i.e. the one that I have called) and return from it. |
|
1165 |
" |
|
1166 |
||
1167 |
%{ |
|
1168 |
OBJ theContext, sndr; |
|
1169 |
||
1170 |
theContext = __thisContext; |
|
1171 |
while (theContext != nil) { |
|
1172 |
sndr = __ContextInstPtr(theContext)->c_sender; |
|
1173 |
if (sndr == self) break; |
|
1174 |
theContext = sndr; |
|
1175 |
} |
|
1176 |
if (theContext != nil) { |
|
1177 |
if (__ContextInstPtr(theContext)->c_sender) { |
|
4635 | 1178 |
if (!((INT)(__ContextInstPtr(theContext)->c_flags) & __MASKSMALLINT(__CANNOT_RETURN))) { |
1179 |
__RESUMECONTEXT__(theContext, value, 0); |
|
1180 |
} |
|
4557 | 1181 |
} |
1182 |
} |
|
1183 |
%}. |
|
1184 |
||
1185 |
"/ no error reporting |
|
1186 |
! |
|
1187 |
||
1188 |
resumeOnErrorProceed:value |
|
1189 |
"resume the receiver - as if it got 'value' from whatever |
|
1190 |
it called. This continues execution in the receivers method |
|
1191 |
after the point where it did its last send. |
|
12841 | 1192 |
If the context has already returned - simply return. |
4557 | 1193 |
|
1194 |
NOTICE: |
|
1195 |
NO unwind actions are performed (see Context>>unwind:). |
|
1196 |
||
12841 | 1197 |
LIMITATION: |
4557 | 1198 |
currently a context can only be resumed by |
1199 |
the owning process - not from outside. |
|
1200 |
Also, the compiler has an option (+optcontext) to create |
|
1201 |
non-resumable contexts (which are faster). |
|
1202 |
If such a context is restarted, a runtime error is raised." |
|
1203 |
||
1204 |
" |
|
1205 |
starting with this context, find the one below |
|
1206 |
(i.e. the one that I have called) and return from it. |
|
1207 |
" |
|
1208 |
||
1209 |
%{ |
|
1210 |
OBJ theContext, sndr; |
|
1211 |
||
1212 |
theContext = __thisContext; |
|
1213 |
while (theContext != nil) { |
|
1214 |
sndr = __ContextInstPtr(theContext)->c_sender; |
|
1215 |
if (sndr == self) break; |
|
1216 |
theContext = sndr; |
|
1217 |
} |
|
1218 |
if (theContext != nil) { |
|
1219 |
if (__ContextInstPtr(theContext)->c_sender) { |
|
1220 |
__RESUMECONTEXT__(theContext, value, 0); |
|
1221 |
} |
|
1222 |
} |
|
1223 |
%}. |
|
1224 |
||
1225 |
"/ no error reporting |
|
1226 |
! |
|
1227 |
||
69 | 1228 |
return |
141 | 1229 |
"return from this context with nil. I.e. as if it did a ^ nil. |
1230 |
NOTICE: |
|
12841 | 1231 |
NO unwind actions are performed - this is usually not |
1232 |
what you want (See Context>>unwind). |
|
1233 |
This is a low level method - a helper for unwind. |
|
1234 |
||
1235 |
LIMITATION: |
|
1236 |
currently a context can only be returned by |
|
1237 |
the owning process - not from outside. |
|
1238 |
Also, the compiler has an option (+optcontext) to create |
|
1239 |
non-returnable contexts (which are faster). |
|
1240 |
If such a context is restarted, a runtime error is raised." |
|
141 | 1241 |
|
1242 |
^ self return:nil |
|
1 | 1243 |
! |
1244 |
||
69 | 1245 |
return:value |
1246 |
"return from this context as if it did a '^ value'. |
|
141 | 1247 |
NOTICE: |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1248 |
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
|
1249 |
what you want (See Context>>unwind:). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1250 |
This is a low level method - a helper for unwind. |
141 | 1251 |
|
12841 | 1252 |
LIMITATION: |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1253 |
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
|
1254 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1255 |
Also, the compiler has an option (+optcontext) to create |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1256 |
non-returnable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1257 |
If such a context is restarted, a runtime error is raised." |
1 | 1258 |
|
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1259 |
%{ /* NOCONTEXT */ |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1260 |
if (__INST(sender_) != nil) { |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1261 |
__RESUMECONTEXT__(self, value, 0); |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1262 |
} |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1263 |
%}. |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1264 |
self sender isNil ifTrue:[^ nil]. |
1 | 1265 |
|
69 | 1266 |
" |
360 | 1267 |
when we arrive here, something went wrong. |
69 | 1268 |
debugging ... |
1269 |
" |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1270 |
^ self invalidReturnOrRestartError:#'return' with:value |
1 | 1271 |
! |
1272 |
||
328 | 1273 |
returnDoing:aBlock |
1274 |
"return from this context as if it did a '^ aBlock value'. |
|
1275 |
The block is evaluated as if called by the receiver context; |
|
1276 |
NOT the true executing context. |
|
1277 |
NOTICE: |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1278 |
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
|
1279 |
what you want (See Context>>unwindThenDo:). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1280 |
This is a low level method - a helper for unwind. |
328 | 1281 |
|
1282 |
LIMITATION: |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1283 |
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
|
1284 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1285 |
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
|
1286 |
non-returnable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1287 |
If such a context is restarted, a runtime error is raised." |
328 | 1288 |
|
12841 | 1289 |
%{ |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1290 |
if (__INST(sender_) != nil) { |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1291 |
__RESUMECONTEXT__(self, aBlock, 2); |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1292 |
} |
360 | 1293 |
%}. |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1294 |
self sender isNil ifTrue:[^ nil]. |
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1295 |
|
328 | 1296 |
" |
360 | 1297 |
when we arrive here, something went wrong. |
328 | 1298 |
debugging ... |
1299 |
" |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1300 |
^ self invalidReturnOrRestartError:#'returnDoing' with:aBlock |
328 | 1301 |
! |
1302 |
||
1 | 1303 |
unwind |
69 | 1304 |
"return nil from the receiver - i.e. simulate a '^ nil'. |
11337 | 1305 |
If the context has already returned, report an error. |
1 | 1306 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
69 | 1307 |
and Block>>valueOnUnwindDo: on the way. |
1 | 1308 |
|
12841 | 1309 |
LIMITATION: |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1310 |
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
|
1311 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1312 |
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
|
1313 |
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
|
1314 |
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
|
1315 |
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
|
1316 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1317 |
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
|
1318 |
non-returnable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1319 |
If such a context is restarted, a runtime error is raised." |
141 | 1320 |
|
1321 |
^ self unwind:nil |
|
1 | 1322 |
! |
1323 |
||
1324 |
unwind:value |
|
69 | 1325 |
"return value from the receiver - i.e. simulate a '^ value'. |
360 | 1326 |
If the context has already returned , report an error. |
1 | 1327 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
69 | 1328 |
and Block>>valueOnUnwindDo: on the way. |
141 | 1329 |
|
12841 | 1330 |
LIMITATION: |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1331 |
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
|
1332 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1333 |
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
|
1334 |
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
|
1335 |
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
|
1336 |
context, by giving it an interrupt action - this does make sense. |
1 | 1337 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1338 |
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
|
1339 |
non-returnable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1340 |
If such a context is restarted, a runtime error is raised." |
1 | 1341 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1342 |
|con| |
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 |
self senderIsNil ifFalse:[ |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1345 |
con := thisContext evaluateUnwindActionsUpTo:self. |
141 | 1346 |
]. |
1 | 1347 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1348 |
"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
|
1349 |
(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
|
1350 |
should we check for this situation first and NOT evaluate |
141 | 1351 |
the unwind actions in this case ?) |
1352 |
" |
|
69 | 1353 |
con isNil ifTrue:[ |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1354 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1355 |
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
|
1356 |
(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
|
1357 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1358 |
^ self invalidReturnOrRestartError:#'unwind:' with:value |
69 | 1359 |
]. |
141 | 1360 |
" |
1361 |
now, that all unwind-actions are done, I can use the |
|
1362 |
low-level return ... |
|
1363 |
" |
|
1364 |
^ self return:value |
|
1365 |
! |
|
1366 |
||
1367 |
unwindAndRestart |
|
1368 |
"restart the receiver - i.e. the method is evaluated again. |
|
13804 | 1369 |
if the context to restart already did report an error. |
141 | 1370 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
1371 |
and Block>>valueOnUnwindDo: before restarting. |
|
1372 |
||
12841 | 1373 |
LIMITATION: |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1374 |
a context can only be restarted by |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1375 |
the owning process - not from outside. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1376 |
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
|
1377 |
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
|
1378 |
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
|
1379 |
context, by giving it an interrupt action - this does make sense. |
141 | 1380 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1381 |
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
|
1382 |
non-restartable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1383 |
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
|
1384 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1385 |
|con| |
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 |
self senderIsNil ifFalse:[ |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1388 |
con := thisContext evaluateUnwindActionsUpTo:self. |
141 | 1389 |
]. |
1390 |
||
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1391 |
"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
|
1392 |
(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
|
1393 |
should we check for this situation first and NOT evaluate |
141 | 1394 |
the unwind actions in this case ?) |
1395 |
" |
|
1396 |
con isNil ifTrue:[ |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1397 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1398 |
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
|
1399 |
(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
|
1400 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1401 |
^ self invalidReturnOrRestartError:#'unwindAndRestart:' with:nil |
141 | 1402 |
]. |
1403 |
" |
|
1404 |
now, that all unwind-actions are done, I can use the |
|
1405 |
low-level restart ... |
|
1406 |
" |
|
1407 |
^ self restart |
|
328 | 1408 |
! |
1409 |
||
4485 | 1410 |
unwindAndResume:value |
1411 |
"resume execution in the the receiver - i.e. simulate a '^ value' |
|
1412 |
from whatever it called last. |
|
1413 |
If the context has already returned , report an error. |
|
1414 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
|
1415 |
and Block>>valueOnUnwindDo: on the way. |
|
1416 |
||
12841 | 1417 |
LIMITATION: |
4485 | 1418 |
currently a context can only be unwound by |
1419 |
the owning process - not from outside. |
|
1420 |
i.e. it is not possible for one thread to unwind |
|
1421 |
another threads context - which does not make sense anyway. |
|
1422 |
However, you can force another thread to do this in its own process |
|
1423 |
context, by giving it an interrupt action - this does make sense. |
|
1424 |
||
1425 |
Also, the compiler has an option (+optcontext) to create |
|
1426 |
non-returnable contexts (which are faster). |
|
1427 |
If such a context is restarted, a runtime error is raised." |
|
1428 |
||
1429 |
|con| |
|
1430 |
||
1431 |
self senderIsNil ifFalse:[ |
|
1432 |
con := thisContext evaluateUnwindActionsUpTo:self. |
|
1433 |
]. |
|
1434 |
||
1435 |
"oops, if nil, I am not on the calling chain; |
|
1436 |
(bad bad, unwind action have already been performed. |
|
1437 |
should we check for this situation first and NOT evaluate |
|
1438 |
the unwind actions in this case ?) |
|
1439 |
" |
|
1440 |
con isNil ifTrue:[ |
|
1441 |
" |
|
1442 |
tried to return to a context which is already dead |
|
1443 |
(i.e. the method/block has already executed a return) |
|
1444 |
" |
|
1445 |
^ self invalidReturnOrRestartError:#'unwindAndResume:' with:value |
|
1446 |
]. |
|
1447 |
" |
|
1448 |
now, that all unwind-actions are done, I can use the |
|
1449 |
low-level resume ... |
|
1450 |
" |
|
1451 |
^ self resume:value |
|
1452 |
! |
|
1453 |
||
12841 | 1454 |
unwindThenDo:aBlock |
328 | 1455 |
"return the value of aBlock from the receiver - i.e. simulate a '^ aBlock value'. |
13804 | 1456 |
If the context has already returned, report an error. |
328 | 1457 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
1458 |
and Block>>valueOnUnwindDo: on the way. |
|
1459 |
The block is evaluated AFTER all unwind actions are performed |
|
1460 |
(i.e. the blocks sender will be the receiving context, not the |
|
402 | 1461 |
currently executing context) |
328 | 1462 |
|
12841 | 1463 |
LIMITATION: |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1464 |
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
|
1465 |
the owning process - not from outside |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1466 |
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
|
1467 |
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
|
1468 |
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
|
1469 |
context, by giving it an interrupt action - this does make sense. |
328 | 1470 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1471 |
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
|
1472 |
non-returnable contexts (which are faster). |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1473 |
If such a context is restarted, a runtime error is raised." |
328 | 1474 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1475 |
|con| |
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 |
self senderIsNil ifFalse:[ |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1478 |
con := thisContext evaluateUnwindActionsUpTo:self. |
328 | 1479 |
]. |
1480 |
||
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1481 |
"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
|
1482 |
(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
|
1483 |
should we check for this situation first and NOT evaluate |
328 | 1484 |
the unwind actions in this case ?) |
1485 |
" |
|
1486 |
con isNil ifTrue:[ |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1487 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1488 |
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
|
1489 |
(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
|
1490 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1491 |
^ self invalidReturnOrRestartError:#'unwindThenDo:' with:aBlock |
328 | 1492 |
]. |
1493 |
" |
|
1494 |
now, that all unwind-actions are done, I can use the |
|
1495 |
low-level return ... |
|
1496 |
" |
|
12841 | 1497 |
^ self returnDoing:aBlock |
1 | 1498 |
! ! |
623 | 1499 |
|
1500 |
!Context methodsFor:'printing & storing'! |
|
1501 |
||
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 |
argStringFor:someObject |
11539 | 1503 |
|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
|
1504 |
%{ |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1505 |
/* |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1506 |
* 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
|
1507 |
* 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
|
1508 |
* which may lead to sends to free objects. In normal operation, this 'cannot' happen. |
14051 | 1509 |
* However, these print methods are also invoked for low-level pointer errors, so better be prepared... |
12841 | 1510 |
*/ |
1070
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1511 |
if (__isNonNilObject(someObject) && (__qClass(someObject)==nil)) { |
11539 | 1512 |
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
|
1513 |
} |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1514 |
%}. |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1515 |
name notNil ifTrue:[^ name]. |
11539 | 1516 |
s := someObject displayString. |
1517 |
s isNil ifTrue:[ |
|
12841 | 1518 |
^ '**************** nil displayString of ',(someObject class name ? '??') |
11539 | 1519 |
]. |
14561 | 1520 |
s isWideString ifTrue:[ |
14051 | 1521 |
"make sure that the object really returns something we can stream into a string" |
1522 |
s := someObject storeString. |
|
1523 |
]. |
|
11539 | 1524 |
^ s |
14051 | 1525 |
|
1526 |
"Modified: / 07-03-2012 / 13:14:17 / cg" |
|
1070
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1527 |
! |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1528 |
|
623 | 1529 |
argsDisplayString |
14051 | 1530 |
^ String streamContents:[:s | self displayArgsOn:s ]. |
1531 |
||
1532 |
"Modified (format): / 07-03-2012 / 13:11:17 / cg" |
|
623 | 1533 |
! |
1534 |
||
6648 | 1535 |
displayArgsOn:aStream |
15388 | 1536 |
| n "{ Class: SmallInteger }" |
1537 |
s | |
|
6648 | 1538 |
|
1539 |
n := self numArgs. |
|
1540 |
1 to:n do:[:index | |
|
15388 | 1541 |
Error handle:[:ex | |
1542 |
s := 'Error in argString'. |
|
1543 |
] do:[ |
|
1544 |
s := (self argStringFor:(self at:index)). |
|
1545 |
]. |
|
1546 |
||
1547 |
aStream nextPutAll:(s contractTo:100). |
|
15383 | 1548 |
index ~~ n ifTrue:[ aStream space ]. |
6648 | 1549 |
]. |
14051 | 1550 |
|
1551 |
"Modified: / 07-03-2012 / 13:09:17 / cg" |
|
6648 | 1552 |
! |
1553 |
||
14293
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1554 |
displayOn:aGCOrStream |
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1555 |
"return a string to display the receiver - for display in Inspector" |
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1556 |
|
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1557 |
"/ what a kludge - Dolphin and Squeak mean: printOn: a stream; |
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1558 |
"/ ST/X (and some old ST80's) mean: draw-yourself on a GC. |
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1559 |
(aGCOrStream isStream) ifFalse:[ |
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1560 |
^ super displayOn:aGCOrStream |
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1561 |
]. |
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1562 |
|
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1563 |
aGCOrStream |
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1564 |
nextPutAll:self class name; |
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1565 |
nextPut:$(. |
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1566 |
self printOn:aGCOrStream. |
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1567 |
aGCOrStream nextPut:$). |
623 | 1568 |
! |
1569 |
||
6648 | 1570 |
fullPrintAllOn:aStream |
12789 | 1571 |
"print a full walkback (incl arguments) starting at the receiver" |
6648 | 1572 |
|
15010 | 1573 |
self withAllSendersDo:[:con | con fullPrintOn:aStream. aStream cr]. |
6648 | 1574 |
|
1575 |
" |
|
1576 |
thisContext fullPrintAllOn:Transcript |
|
1577 |
" |
|
1578 |
||
1579 |
"Created: 15.1.1997 / 18:09:05 / cg" |
|
1580 |
! |
|
1581 |
||
13612 | 1582 |
fullPrintAllString |
1583 |
"return a string containing the full walkback (incl. arguments)" |
|
1584 |
||
1585 |
|s| |
|
1586 |
||
15383 | 1587 |
s := WriteStream on:''. |
13612 | 1588 |
self fullPrintAllOn:s. |
1589 |
^ s contents |
|
1590 |
||
1591 |
" |
|
1592 |
thisContext fullPrintAllString |
|
1593 |
" |
|
1594 |
||
1595 |
"Created: / 21-08-2011 / 07:37:36 / cg" |
|
1596 |
! |
|
1597 |
||
6648 | 1598 |
fullPrintOn:aStream |
12789 | 1599 |
"append a verbose description (incl. arguments) of the receiver onto aStream" |
6648 | 1600 |
|
15383 | 1601 |
self printReceiverOn:aStream. |
12841 | 1602 |
aStream nextPutAll:' >> '. |
11311 | 1603 |
self selector printOn:aStream. "show as string (as symbol looks too ugly in browser ...)" |
1604 |
"/ self selector storeOn:aStream. "show as symbol" |
|
8578 | 1605 |
|
6648 | 1606 |
self size ~~ 0 ifTrue: [ |
15383 | 1607 |
aStream space. |
6648 | 1608 |
self displayArgsOn:aStream |
1609 |
]. |
|
12841 | 1610 |
aStream nextPutAll:' {'. |
1611 |
self identityHash printOn:aStream. |
|
15383 | 1612 |
aStream nextPut:$}. |
12841 | 1613 |
|
1614 |
aStream nextPutAll:' ['. |
|
6648 | 1615 |
self lineNumber printOn:aStream. |
15383 | 1616 |
aStream nextPut:$]. |
6648 | 1617 |
|
1618 |
" |
|
1619 |
thisContext fullPrintOn:Transcript |
|
1620 |
" |
|
1621 |
||
1622 |
"Modified: 20.5.1996 / 10:27:14 / cg" |
|
1623 |
"Created: 15.1.1997 / 18:09:06 / cg" |
|
1624 |
! |
|
1625 |
||
623 | 1626 |
fullPrintString |
1627 |
"return a string describing the context - this includes the linenumber, |
|
1628 |
receiver printString and argument printString" |
|
1629 |
||
1630 |
|s| |
|
1631 |
||
15383 | 1632 |
s := WriteStream on:''. |
6648 | 1633 |
self fullPrintOn:s. |
623 | 1634 |
^ s contents |
1635 |
||
1636 |
" |
|
1637 |
thisContext fullPrintString |
|
1638 |
" |
|
1639 |
! |
|
1640 |
||
1641 |
methodPrintString |
|
12841 | 1642 |
"return a string describing the contexts method as 'implementorClass>>selector'" |
623 | 1643 |
|
1853
09cd1e8df9a2
use new Method>>who interface
Claus Gittinger <cg@exept.de>
parents:
1810
diff
changeset
|
1644 |
|mthd who| |
623 | 1645 |
|
1646 |
mthd := self method. |
|
1647 |
mthd notNil ifTrue:[ |
|
11306
c0c5c6a7054a
Print methods: Show message sends as Class >> #selector (with the #),
Stefan Vogel <sv@exept.de>
parents:
10943
diff
changeset
|
1648 |
who := mthd who. |
c0c5c6a7054a
Print methods: Show message sends as Class >> #selector (with the #),
Stefan Vogel <sv@exept.de>
parents:
10943
diff
changeset
|
1649 |
who notNil ifTrue:[ |
c0c5c6a7054a
Print methods: Show message sends as Class >> #selector (with the #),
Stefan Vogel <sv@exept.de>
parents:
10943
diff
changeset
|
1650 |
^ 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
|
1651 |
] |
623 | 1652 |
]. |
1653 |
^ mthd displayString. |
|
1654 |
||
1655 |
" |
|
12841 | 1656 |
thisContext methodPrintString |
1657 |
thisContext sender methodPrintString |
|
623 | 1658 |
" |
1853
09cd1e8df9a2
use new Method>>who interface
Claus Gittinger <cg@exept.de>
parents:
1810
diff
changeset
|
1659 |
|
09cd1e8df9a2
use new Method>>who interface
Claus Gittinger <cg@exept.de>
parents:
1810
diff
changeset
|
1660 |
"Modified: 1.11.1996 / 16:21:49 / cg" |
623 | 1661 |
! |
1662 |
||
12789 | 1663 |
printAllOn:aStream |
1664 |
"print a brief walkback (excl. arguments) starting at the receiver" |
|
1665 |
||
15010 | 1666 |
self withAllSendersDo:[:con | con printOn:aStream. aStream cr]. |
12789 | 1667 |
|
1668 |
" |
|
1669 |
thisContext printAllOn:Transcript |
|
1670 |
" |
|
1671 |
||
1672 |
"Created: 15.1.1997 / 18:09:05 / cg" |
|
1673 |
! |
|
1674 |
||
13612 | 1675 |
printAllString |
1676 |
"return a string containing the walkback (excl. arguments)" |
|
1677 |
||
1678 |
|s| |
|
1679 |
||
15383 | 1680 |
s := WriteStream on:''. |
13612 | 1681 |
self printAllOn:s. |
1682 |
^ s contents |
|
1683 |
||
1684 |
" |
|
1685 |
thisContext printAllString |
|
1686 |
" |
|
1687 |
||
1688 |
"Created: / 21-08-2011 / 07:38:05 / cg" |
|
1689 |
! |
|
1690 |
||
623 | 1691 |
printOn:aStream |
12789 | 1692 |
"append a brief description (excl. arguments) of the receiver onto aStream" |
623 | 1693 |
|
15383 | 1694 |
self printReceiverOn:aStream. |
10549 | 1695 |
"/ aStream nextPutAll:' '. |
1696 |
aStream nextPutAll:' >> '. |
|
1697 |
||
1698 |
aStream bold. |
|
11310
830490e3ac43
dont use storeString of selector in #printOn:
Claus Gittinger <cg@exept.de>
parents:
11306
diff
changeset
|
1699 |
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
|
1700 |
"/ self selector storeOn:aStream. "show as symbol" |
10549 | 1701 |
aStream normal. |
4393 | 1702 |
aStream space. |
14225 | 1703 |
(method notNil and:[method isWrapped]) ifTrue:[ |
14302 | 1704 |
aStream nextPutAll:'(wrapped) ' |
14225 | 1705 |
]. |
4393 | 1706 |
aStream nextPutAll:' ['; nextPutAll:self lineNumber printString; nextPutAll:']' . |
1707 |
||
14302 | 1708 |
"Modified: / 05-08-2012 / 12:00:00 / cg" |
623 | 1709 |
! |
1710 |
||
15383 | 1711 |
printReceiverOn:aStream |
1712 |
"print description of the receiver of the context to aStream" |
|
1713 |
||
1714 |
|receiverClass receiverClassName implementorClass| |
|
1715 |
||
1716 |
receiverClassName := self safeReceiverClassName. |
|
1717 |
receiverClassName notNil ifTrue:[ |
|
1718 |
"if we come here, this is a context with an illegal class" |
|
1719 |
receiverClassName printOn:aStream. |
|
1720 |
^ self. |
|
1721 |
]. |
|
1070
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1722 |
|
623 | 1723 |
receiverClass := receiver class. |
15383 | 1724 |
|
1725 |
(receiverClass == SmallInteger or:[receiverClass == Float]) ifTrue:[ |
|
1726 |
aStream nextPut:$(. receiver printOn:aStream. aStream nextPutAll:') '. |
|
1727 |
]. |
|
1728 |
||
3923 | 1729 |
receiverClass isJavaClass ifTrue:[ |
15383 | 1730 |
receiverClass displayOn:aStream |
3923 | 1731 |
] ifFalse:[ |
13519
16c0afd67cae
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
13516
diff
changeset
|
1732 |
"/ (receiverClass isBehavior |
16c0afd67cae
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
13516
diff
changeset
|
1733 |
"/ and:[receiverClass isMeta |
16c0afd67cae
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
13516
diff
changeset
|
1734 |
"/ and:[receiverClass soleInstance isJavaClass]]) ifTrue:[ |
16c0afd67cae
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
13516
diff
changeset
|
1735 |
"/ "/ receiverClassName := receiverClass soleInstance fullName. |
16c0afd67cae
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
13516
diff
changeset
|
1736 |
"/ receiverClassName := receiverClass name. |
16c0afd67cae
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
13516
diff
changeset
|
1737 |
"/ ] ifFalse:[ |
16c0afd67cae
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
13516
diff
changeset
|
1738 |
"/ receiverClassName := receiverClass name. |
16c0afd67cae
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
13516
diff
changeset
|
1739 |
"/ ]. |
15383 | 1740 |
(receiverClass name ? '????') printOn:aStream. |
3923 | 1741 |
]. |
15383 | 1742 |
|
1743 |
(selector notNil or:[method notNil]) ifTrue:[ |
|
14700 | 1744 |
"/ implementorClass := self searchClass whichClassIncludesSelector:selector. |
623 | 1745 |
|
3923 | 1746 |
" |
1747 |
kludge to avoid slow search for containing class |
|
1748 |
" |
|
14700 | 1749 |
(method notNil |
15383 | 1750 |
or:[selector ~~ #doIt and:[selector ~~ #doIt:]]) ifTrue:[ |
12841 | 1751 |
implementorClass := self methodClass. |
14413
7acfc6568d15
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
14302
diff
changeset
|
1752 |
implementorClass isNil ifTrue:[ |
7acfc6568d15
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
14302
diff
changeset
|
1753 |
" |
7acfc6568d15
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
14302
diff
changeset
|
1754 |
kludge for the frame called by a wrappedmethod; |
7acfc6568d15
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
14302
diff
changeset
|
1755 |
the wrappedmethod is in the class, so its mclass is correct. |
7acfc6568d15
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
14302
diff
changeset
|
1756 |
however, the originalmethod is invoked via performMethod, and its mclass |
7acfc6568d15
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
14302
diff
changeset
|
1757 |
is nil. Care for this here. Think about keeping the mclass in the original method. |
7acfc6568d15
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
14302
diff
changeset
|
1758 |
" |
14418
6558e5c3b32e
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
14413
diff
changeset
|
1759 |
(method notNil and:[method isWrapped not]) ifTrue:[ |
14413
7acfc6568d15
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
14302
diff
changeset
|
1760 |
WrappedMethod allInstancesDo:[:wrapped | |
7acfc6568d15
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
14302
diff
changeset
|
1761 |
wrapped originalMethodIfWrapped == method ifTrue:[ |
7acfc6568d15
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
14302
diff
changeset
|
1762 |
implementorClass := wrapped mclass. |
7acfc6568d15
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
14302
diff
changeset
|
1763 |
]. |
7acfc6568d15
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
14302
diff
changeset
|
1764 |
]. |
7acfc6568d15
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
14302
diff
changeset
|
1765 |
] |
7acfc6568d15
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
14302
diff
changeset
|
1766 |
]. |
3923 | 1767 |
]. |
1768 |
||
1769 |
implementorClass notNil ifTrue: [ |
|
1770 |
(implementorClass ~~ receiverClass) ifTrue: [ |
|
15383 | 1771 |
aStream nextPut:$(. |
1772 |
(implementorClass name ? '???') printOn:aStream. |
|
1773 |
aStream nextPut:$). |
|
3923 | 1774 |
] |
1775 |
] ifFalse:[ |
|
1776 |
self searchClass ~~ receiverClass ifTrue:[ |
|
15383 | 1777 |
aStream nextPut:$(. |
1778 |
(self searchClass name ? '???') printOn:aStream. |
|
1779 |
aStream nextPut:$). |
|
3923 | 1780 |
]. |
1781 |
" |
|
1782 |
kludge for doIt - these unbound methods are not |
|
1783 |
found in the classes methodDictionary |
|
1784 |
" |
|
14700 | 1785 |
true "(selector ~~ #doIt and:[selector ~~ #doIt:])" ifTrue:[ |
1786 |
" |
|
1787 |
kludge for methods invoked explicitly via valueWithReceiver... |
|
1788 |
" |
|
1789 |
(self sender notNil |
|
1790 |
and:[ self sender receiver isMethod |
|
1791 |
and:[ self sender selector startsWith:'valueWithReceiver:' ]]) ifTrue:[ |
|
15383 | 1792 |
aStream nextPutAll:'(**DIRECTED**)'. |
14700 | 1793 |
] ifFalse:[ |
15383 | 1794 |
aStream nextPutAll:'(**NONE**)'. |
14700 | 1795 |
] |
3923 | 1796 |
] |
1797 |
] |
|
623 | 1798 |
]. |
1799 |
||
14216
e972d852ed60
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
14214
diff
changeset
|
1800 |
"Modified: / 13-06-2012 / 14:49:33 / cg" |
10549 | 1801 |
! |
1802 |
||
15383 | 1803 |
receiverPrintString |
1804 |
"return a string describing the receiver of the context" |
|
1805 |
||
1806 |
|s| |
|
1807 |
||
1808 |
s := WriteStream on:''. |
|
1809 |
self printReceiverOn:s. |
|
1810 |
^ s contents |
|
1811 |
||
1812 |
" |
|
1813 |
thisContext receiverPrintString |
|
1814 |
" |
|
1815 |
! |
|
1816 |
||
1817 |
safeReceiverClassName |
|
10549 | 1818 |
"return the receivers class-name string or nil, if the receiver is invalid. |
1819 |
This cares for invalid (free) objects which may appear with bad primitive code, |
|
1820 |
and prevents a crash in such a case." |
|
1821 |
||
1822 |
|receiverClassName| |
|
1823 |
||
1824 |
%{ |
|
1825 |
/* |
|
1826 |
* special handling for (invalid) free objects. |
|
1827 |
* these only appear if some primitiveCode does not correctly use SEND macros, |
|
1828 |
* which may lead to sends to free objects. In normal operation, this 'cannot' happen. |
|
12841 | 1829 |
*/ |
10549 | 1830 |
if (__isNonNilObject(__INST(receiver)) && (__qClass(__INST(receiver))==nil)) { |
1831 |
receiverClassName = __MKSTRING("FreeObject"); |
|
1832 |
} |
|
1833 |
%}. |
|
1834 |
^ receiverClassName |
|
1835 |
||
1836 |
"Created: / 21-05-2007 / 13:19:37 / cg" |
|
623 | 1837 |
! ! |
1838 |
||
7257 | 1839 |
!Context methodsFor:'private-accessing'! |
623 | 1840 |
|
11340
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1841 |
isMarkedForUnwind |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1842 |
"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
|
1843 |
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
|
1844 |
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
|
1845 |
|
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1846 |
%{ /* NOCONTEXT */ |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1847 |
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
|
1848 |
%} |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1849 |
" |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1850 |
thisContext isMarkedForUnwind |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1851 |
" |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1852 |
! |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1853 |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1854 |
markForHandle |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1855 |
"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
|
1856 |
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
|
1857 |
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
|
1858 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1859 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1860 |
__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
|
1861 |
%} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1862 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1863 |
"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
|
1864 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1865 |
|
753
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1866 |
markForInterrupt |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1867 |
"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
|
1868 |
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
|
1869 |
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
|
1870 |
|
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1871 |
%{ /* NOCONTEXT */ |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1872 |
__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
|
1873 |
%} |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1874 |
! |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
1875 |
|
1727 | 1876 |
markForInterruptOnUnwind |
1877 |
"set the interrupt-on-unwind flag in the receiver. |
|
1878 |
The VM will generate a stepInterrupt, when this context returns or |
|
1879 |
is unwound. This is used by the debugger for faster single-stepping; |
|
1880 |
- a highly internal mechanism and not for public use." |
|
1881 |
||
1882 |
%{ /* NOCONTEXT */ |
|
3508 | 1883 |
__INST(flags) = (OBJ)((INT)__INST(flags) | __MASKSMALLINT(__IRQ_ON_UNWIND)); |
1727 | 1884 |
%} |
1885 |
! |
|
1886 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1887 |
markForRaise |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1888 |
"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
|
1889 |
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
|
1890 |
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
|
1891 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1892 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1893 |
__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
|
1894 |
%} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1895 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1896 |
"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
|
1897 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1898 |
|
623 | 1899 |
markForUnwind |
749 | 1900 |
"set the mark for unwind flag in the receiver. |
1901 |
The VM needs this to know that some special action is to be performed with |
|
1902 |
this context - a highly internal mechanism and not for public use." |
|
1903 |
||
623 | 1904 |
%{ /* NOCONTEXT */ |
1133 | 1905 |
__INST(flags) = (OBJ)((INT)__INST(flags) | __MASKSMALLINT(__UNWIND_MARK)); |
623 | 1906 |
%} |
749 | 1907 |
|
1908 |
"Modified: 13.12.1995 / 19:05:22 / cg" |
|
623 | 1909 |
! |
1910 |
||
5780 | 1911 |
setHome:aContext |
1912 |
"set the homeContext. |
|
1913 |
DANGER: this is for experimental, internal use only (byteCode interpreters)" |
|
1914 |
||
1915 |
home := aContext. |
|
1916 |
! |
|
1917 |
||
1918 |
setSender:aContext |
|
1919 |
"set the sender of the context. |
|
1920 |
DANGER: this is for experimental, internal use only (byteCode interpreters)" |
|
1921 |
||
1922 |
%{ /* NOCONTEXT */ |
|
1923 |
__INST(sender_) = aContext; |
|
1924 |
%} |
|
1925 |
! |
|
1926 |
||
623 | 1927 |
unmarkForUnwind |
749 | 1928 |
"clear the mark for unwind flag in the receiver. |
1929 |
The VM needs this to know that some special action is to be performed with |
|
1930 |
this context - a highly internal mechanism and not for public use." |
|
1931 |
||
623 | 1932 |
%{ /* NOCONTEXT */ |
1133 | 1933 |
__INST(flags) = (OBJ)((INT)__INST(flags) & ~__MASKSMALLINT(__UNWIND_MARK)); |
623 | 1934 |
%} |
1935 |
! ! |
|
1936 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1937 |
!Context methodsFor:'searching'! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1938 |
|
8284 | 1939 |
findExceptional |
12841 | 1940 |
"walk along the sender chain (starting with the sender), |
8284 | 1941 |
for a context which is marked as handle or raise context. |
1942 |
This non-standard interface is only to be used by exception" |
|
1943 |
||
1944 |
"/ this could have been (actually: was) implemented as: |
|
1945 |
"/ |
|
1946 |
"/ |con| |
|
1947 |
"/ |
|
1948 |
"/ con := self. |
|
1949 |
"/ [con notNil] whileTrue:[ |
|
1950 |
"/ [con isHandleContext] ifTrue:[^con]. |
|
1951 |
"/ [con isRaiseContext] ifTrue:[^con]. |
|
1952 |
"/ con := con sender. |
|
1953 |
"/ ]. |
|
1954 |
"/ ^ nil |
|
1955 |
"/ |
|
1956 |
"/ and the code below does exactly this (somewhat faster, though). |
|
1957 |
"/ |
|
1958 |
"/ (it avoids referencing all intermediate contexts, which would mark them special, |
|
1959 |
"/ although they aren't really - this is expert knowledge, no need to understand that ...) |
|
1960 |
||
1961 |
%{ /* NOCONTEXT */ |
|
1962 |
||
1963 |
OBJ theContext; |
|
1964 |
||
1965 |
theContext = self; |
|
1966 |
while (__isNonNilObject(theContext)) { |
|
1967 |
if ((INT)(__ContextInstPtr(theContext)->c_flags) & __MASKSMALLINT(__HANDLE_MARK|__RAISE_MARK)) { |
|
1968 |
if (__isLazy(theContext)) { |
|
1969 |
__PATCHUPCONTEXT(theContext); |
|
1970 |
} |
|
1971 |
||
1972 |
if (! __isNonLIFO(theContext)) { |
|
12841 | 1973 |
/* |
1974 |
* to be prepared for the worst situation |
|
8284 | 1975 |
* (the sender is not stored, so the trap won't catch it) |
1976 |
* make the writeBarrier trigger manually. |
|
1977 |
* We'll see, if this is really required. |
|
1978 |
*/ |
|
1979 |
theContext->o_space |= CATCHMARK; |
|
1980 |
#if 0 |
|
15232 | 1981 |
__markNonLIFO(theContext); |
8284 | 1982 |
#endif |
1983 |
} |
|
1984 |
RETURN (theContext); |
|
1985 |
} |
|
1986 |
theContext = __ContextInstPtr(theContext)->c_sender; |
|
1987 |
} |
|
1988 |
%}. |
|
1989 |
^ nil |
|
1990 |
! |
|
1991 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1992 |
findNextContextWithSelector:selector1 or:selector2 or:selector3 |
12841 | 1993 |
"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
|
1994 |
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
|
1995 |
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
|
1996 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1997 |
"/ 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
|
1998 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
1999 |
"/ |con| |
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 |
"/ con := self sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2002 |
"/ [con notNil] whileTrue:[ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2003 |
"/ 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
|
2004 |
"/ con := con sender. |
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 |
"/ ^ nil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2007 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2008 |
"/ 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
|
2009 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2010 |
"/ (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
|
2011 |
"/ 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
|
2012 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2013 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2014 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2015 |
OBJ theContext; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2016 |
OBJ sel; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2017 |
OBJ __FETCHSELECTOR(); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2018 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2019 |
theContext = __INST(sender_); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2020 |
while (__isNonNilObject(theContext)) { |
5422 | 2021 |
if (__isLazy(theContext)) { |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2022 |
#ifdef TRADITIONAL_STACK_FRAME |
5422 | 2023 |
sel = __FETCHSELECTOR(theContext); |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2024 |
#else |
5422 | 2025 |
/* mhmh - not really needed */ |
2026 |
__PATCHUPCONTEXT(theContext); |
|
2027 |
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
|
2028 |
#endif |
5422 | 2029 |
} else { |
2030 |
sel = __ContextInstPtr(theContext)->c_selector; |
|
2031 |
} |
|
2032 |
||
2033 |
if ((sel == selector1) |
|
2034 |
|| ((selector2 != nil) && (sel == selector2)) |
|
2035 |
|| ((selector3 != nil) && (sel == selector3))) { |
|
2036 |
if (__isLazy(theContext)) { |
|
2037 |
__PATCHUPCONTEXT(theContext); |
|
2038 |
} |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2039 |
|
5422 | 2040 |
if (! __isNonLIFO(theContext)) { |
12841 | 2041 |
/* |
2042 |
* to be prepared for the worst situation |
|
15232 | 2043 |
* (the sender is not stored, so the trap won't catch it) |
5422 | 2044 |
* make the writeBarrier trigger manually. |
2045 |
* We'll see, if this is really required. |
|
2046 |
*/ |
|
2047 |
theContext->o_space |= CATCHMARK; |
|
15232 | 2048 |
__markNonLIFO(theContext); |
5422 | 2049 |
} |
2050 |
RETURN (theContext); |
|
2051 |
} |
|
2052 |
theContext = __ContextInstPtr(theContext)->c_sender; |
|
2053 |
} |
|
2054 |
RETURN (nil); |
|
2055 |
%}. |
|
2056 |
" |
|
2057 |
|con sel| |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2058 |
|
5422 | 2059 |
con := self sender. |
2060 |
[con notNil] whileTrue:[ |
|
2061 |
sel := con selector. |
|
2062 |
sel == selector1 ifTrue:[^ con]. |
|
2063 |
(selector2 notNil and:[sel == selector2]) ifTrue:[^ con]. |
|
2064 |
(selector3 notNil and:[sel == selector3]) ifTrue:[^ con]. |
|
2065 |
con := con sender. |
|
2066 |
]. |
|
2067 |
^ nil |
|
2068 |
" |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2069 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2070 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2071 |
findNextUnwindContextOr:aContext |
12841 | 2072 |
"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
|
2073 |
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
|
2074 |
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
|
2075 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2076 |
"/ 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
|
2077 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2078 |
"/ |con| |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2079 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2080 |
"/ con := self sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2081 |
"/ [con notNil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2082 |
"/ and:[con ~~ aContext |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2083 |
"/ 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
|
2084 |
"/ ^ con |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2085 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2086 |
"/ 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
|
2087 |
"/ (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
|
2088 |
"/ 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
|
2089 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2090 |
%{ /* NOCONTEXT */ |
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 |
OBJ theContext; |
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 |
if (self == aContext) { |
4485 | 2095 |
RETURN (self); |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2096 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2097 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2098 |
theContext = __INST(sender_); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2099 |
while (__isNonNilObject(theContext)) { |
4485 | 2100 |
if ((theContext == aContext) |
2101 |
|| ((INT)(__ContextInstPtr(theContext)->c_flags) & __MASKSMALLINT(__UNWIND_MARK))) { |
|
2102 |
if (__isLazy(theContext)) { |
|
2103 |
__PATCHUPCONTEXT(theContext); |
|
2104 |
} |
|
2105 |
if (! __isNonLIFO(theContext)) { |
|
2106 |
/* |
|
2107 |
* to be prepared for the worst situation |
|
15232 | 2108 |
* (the sender is not stored, so the trap won't catch it) |
4485 | 2109 |
* make the writeBarrier trigger manually. |
2110 |
* We'll see, if this is really required. |
|
2111 |
*/ |
|
2112 |
theContext->o_space |= CATCHMARK; |
|
2113 |
#if 0 |
|
15232 | 2114 |
__markNonLIFO(theContext); |
4485 | 2115 |
#endif |
2116 |
} |
|
2117 |
RETURN (theContext); |
|
2118 |
} |
|
2119 |
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
|
2120 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2121 |
%}. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2122 |
^ nil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2123 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2124 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2125 |
findSpecialHandle:findHandleContext raise:findRaiseContext |
12841 | 2126 |
"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
|
2127 |
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
|
2128 |
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
|
2129 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2130 |
"/ 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
|
2131 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2132 |
"/ |con| |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2133 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2134 |
"/ con := self sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2135 |
"/ [con notNil] whileTrue:[ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2136 |
"/ (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
|
2137 |
"/ (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
|
2138 |
"/ con := con sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2139 |
"/ ]. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2140 |
"/ ^ nil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2141 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2142 |
"/ 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
|
2143 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2144 |
"/ (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
|
2145 |
"/ 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
|
2146 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2147 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2148 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2149 |
OBJ theContext; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2150 |
int flagMask = 0; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2151 |
INT mask; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2152 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2153 |
if (findHandleContext == true) |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2154 |
flagMask = __HANDLE_MARK; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2155 |
if (findRaiseContext == true) |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2156 |
flagMask |= __RAISE_MARK; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2157 |
|
12841 | 2158 |
mask = __MASKSMALLINT(flagMask); |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2159 |
theContext = __INST(sender_); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2160 |
while (__isNonNilObject(theContext)) { |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2161 |
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
|
2162 |
if (__isLazy(theContext)) { |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2163 |
__PATCHUPCONTEXT(theContext); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2164 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2165 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2166 |
if (! __isNonLIFO(theContext)) { |
12841 | 2167 |
/* |
2168 |
* 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
|
2169 |
* (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
|
2170 |
* 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
|
2171 |
* 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
|
2172 |
*/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2173 |
theContext->o_space |= CATCHMARK; |
4485 | 2174 |
#if 0 |
15232 | 2175 |
__markNonLIFO(theContext); |
4485 | 2176 |
#endif |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2177 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2178 |
RETURN (theContext); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2179 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2180 |
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
|
2181 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2182 |
%}. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2183 |
^ nil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2184 |
! ! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2185 |
|
1051 | 2186 |
!Context methodsFor:'special accessing'! |
2187 |
||
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2188 |
argAndVarNames |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2189 |
"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
|
2190 |
|
12841 | 2191 |
|homeContext method block numArgs numVars m src |
8217 | 2192 |
sel isDoIt blocksLineNr extractFromBlock sender| |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2193 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2194 |
numArgs := self numArgs. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2195 |
numVars := self numVars. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2196 |
(numArgs == 0 and:[numVars == 0]) ifTrue:[^ #()]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2197 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2198 |
homeContext := self methodHome. |
7652 | 2199 |
homeContext notNil ifTrue:[ |
2200 |
sel := homeContext selector. |
|
2201 |
method := homeContext method. |
|
2202 |
]. |
|
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2203 |
|
12841 | 2204 |
extractFromBlock := |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2205 |
[ |
8772
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2206 |
|blockNode argNames varNames vars args blocksHome| |
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 |
blockNode := Compiler |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2209 |
blockAtLine:blocksLineNr |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2210 |
in:m |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2211 |
orSource:src |
12841 | 2212 |
numArgs:numArgs |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2213 |
numVars:numVars. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2214 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2215 |
blockNode notNil ifTrue:[ |
8772
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2216 |
"/ a kludge |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2217 |
blockNode lineNumber == blocksLineNr ifTrue:[ |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2218 |
blocksHome := blockNode home. |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2219 |
(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
|
2220 |
(blocksHome numArgs == numArgs |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2221 |
and:[ blocksHome numVars == numVars ]) ifTrue:[ |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2222 |
blockNode := blocksHome |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2223 |
]. |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2224 |
]. |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2225 |
]. |
9a5d7a368a34
kludge for a blocks context arg-and-var names
Claus Gittinger <cg@exept.de>
parents:
8687
diff
changeset
|
2226 |
|
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2227 |
argNames := #(). |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2228 |
varNames := #(). |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2229 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2230 |
numArgs > 0 ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2231 |
vars := blockNode arguments. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2232 |
vars size > 0 ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2233 |
argNames := vars collect:[:var | var name] |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2234 |
] |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2235 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2236 |
numVars > 0 ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2237 |
vars := blockNode variables. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2238 |
vars size > 0 ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2239 |
varNames := vars collect:[:var | var name]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2240 |
] |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2241 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2242 |
^ argNames , varNames |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2243 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2244 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2245 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2246 |
"/ #doIt needs special handling below |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2247 |
isDoIt := (sel == #'doIt') or:[sel == #'doIt:']. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2248 |
self isBlockContext ifFalse:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2249 |
isDoIt ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2250 |
method notNil ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2251 |
"/ special for #doIt |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2252 |
m := nil. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2253 |
src := ('[' , method source , '\]') withCRs. |
8217 | 2254 |
"/ blocksLineNr := self lineNumber. |
8242
594cfd2150f7
oops - must care for doIt contexts
Claus Gittinger <cg@exept.de>
parents:
8217
diff
changeset
|
2255 |
blocksLineNr := (self home ? self) lineNumber. |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2256 |
extractFromBlock value. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2257 |
] |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2258 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2259 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2260 |
method notNil ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2261 |
^ method methodArgAndVarNames. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2262 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2263 |
^ #() |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2264 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2265 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2266 |
method notNil ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2267 |
isDoIt ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2268 |
"/ special for #doIt |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2269 |
"/ my source is found in the method. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2270 |
m := nil. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2271 |
src := ('[' , method source , '\]') withCRs. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2272 |
] ifFalse:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2273 |
m := method. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2274 |
src := nil. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2275 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2276 |
blocksLineNr := self lineNumber. |
8020 | 2277 |
extractFromBlock value. |
7747
27be5f627b03
fixed argAndVarNames for inner blocks.
Claus Gittinger <cg@exept.de>
parents:
7652
diff
changeset
|
2278 |
blocksLineNr := self home lineNumber. |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2279 |
extractFromBlock value. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2280 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2281 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2282 |
blocksLineNr isNil ifTrue:[ |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2283 |
self isBlockContext ifTrue:[ |
8217 | 2284 |
sender := self sender. |
2285 |
(sender notNil |
|
2286 |
and:[sender receiver isBlock |
|
2287 |
and:[sender selector startsWith:'value']]) |
|
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2288 |
ifTrue:[ |
8217 | 2289 |
block := sender receiver. |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2290 |
src := block source. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2291 |
src isNil ifTrue:[ |
8488 | 2292 |
self error:'no source'. |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2293 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2294 |
blocksLineNr := 1. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2295 |
extractFromBlock value. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2296 |
]. |
8217 | 2297 |
sender := nil. |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2298 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2299 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2300 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2301 |
^ #() |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2302 |
! |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2303 |
|
4557 | 2304 |
canResume |
2305 |
"return true, if the receiver allows to be resumed. |
|
2306 |
Due to the implementation, this requires that the context which |
|
2307 |
is right below the receiver is returnable." |
|
2308 |
||
2309 |
|theContext| |
|
2310 |
||
2311 |
" |
|
2312 |
starting with this context, find the one below |
|
2313 |
(i.e. the one that I have called) and return from it. |
|
2314 |
" |
|
2315 |
%{ |
|
2316 |
OBJ sndr; |
|
2317 |
||
2318 |
theContext = __thisContext; |
|
2319 |
while (theContext != nil) { |
|
2320 |
sndr = __ContextInstPtr(theContext)->c_sender; |
|
2321 |
if (sndr == self) break; |
|
2322 |
theContext = sndr; |
|
2323 |
} |
|
2324 |
if (theContext != nil) { |
|
2325 |
if (__isLazy(theContext)) { |
|
2326 |
__PATCHUPCONTEXT(theContext); |
|
2327 |
} |
|
2328 |
} |
|
2329 |
%}. |
|
2330 |
theContext isNil ifTrue:[ |
|
2331 |
^ false |
|
2332 |
]. |
|
2333 |
^ theContext canReturn |
|
2334 |
! |
|
2335 |
||
1051 | 2336 |
canReturn |
2337 |
"return true, if the receiver allows returning through it. |
|
4557 | 2338 |
Blocks, (currently) always return false. |
2646 | 2339 |
Methods which contain a (non-inlined) block are always |
2340 |
returnable - for other methods, it depends on how the system |
|
2341 |
was compiled (stc flag +/-optContext). |
|
2342 |
If it was compiled with +optContext, methods are compiled |
|
4557 | 2343 |
non returnable, unless a return-pragma was present in the method. |
2646 | 2344 |
Since this saves some administrative work in every method |
2345 |
invocation and makes overall execution faster, the system classes |
|
2346 |
are all compiled with this flag turned on." |
|
1051 | 2347 |
|
2348 |
%{ /* NOCONTEXT */ |
|
2349 |
||
3508 | 2350 |
RETURN ( ((INT)(__INST(flags)) & __MASKSMALLINT(__CANNOT_RETURN)) ? false : true ); |
5441 | 2351 |
%}. |
2352 |
^ true |
|
1051 | 2353 |
! |
2354 |
||
1492 | 2355 |
hasStackToShow |
2646 | 2356 |
"private interface to the debugger. |
2357 |
Smalltalk contexts return false here - other language frames |
|
2358 |
(i.e. Java frames) may want to show the evaluation stack" |
|
2359 |
||
1492 | 2360 |
^ false |
2361 |
||
2362 |
"Created: 28.6.1996 / 14:48:39 / cg" |
|
2646 | 2363 |
"Modified: 13.5.1997 / 16:31:12 / cg" |
1492 | 2364 |
! |
2365 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2366 |
isHandleContext |
4505 | 2367 |
"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
|
2368 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2369 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2370 |
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
|
2371 |
%} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2372 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2373 |
|
1051 | 2374 |
isNonLifo |
2646 | 2375 |
"return true, if this is a nonLifo context. |
2376 |
A nonLifo context is one that is still on the machine stack, |
|
2377 |
but has a reference taken and needs to be converted to a real |
|
2378 |
object (in objectMemory) when the method/block returns. |
|
2379 |
You dont have to understand this - this is a special ST/X |
|
2380 |
debug query, which may be removed without notice." |
|
1051 | 2381 |
|
2382 |
%{ /* NOCONTEXT */ |
|
1133 | 2383 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__NONLIFO)) ? true : false ); |
1051 | 2384 |
%} |
2385 |
! |
|
2386 |
||
2387 |
isOnMachineStack |
|
12841 | 2388 |
"return true, if this is a machine stack context as opposed to a |
2646 | 2389 |
real heap context. |
2390 |
You dont have to understand this - this is a special ST/X |
|
2391 |
debug query, which may be removed without notice." |
|
1051 | 2392 |
|
2393 |
%{ /* NOCONTEXT */ |
|
2394 |
RETURN ( (__qSpace(self) >= STACKSPACE) ? true : false ); |
|
2395 |
%} |
|
2396 |
! |
|
2397 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2398 |
isRaiseContext |
4505 | 2399 |
"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
|
2400 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2401 |
%{ /* NOCONTEXT */ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2402 |
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
|
2403 |
%} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2404 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2405 |
|
1051 | 2406 |
isSpecial |
2407 |
"return true, if this is either a nonLifo or interrupted context" |
|
2408 |
||
2409 |
%{ /* NOCONTEXT */ |
|
1133 | 2410 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__SPECIAL)) ? true : false ); |
1051 | 2411 |
%} |
2412 |
! |
|
2413 |
||
2414 |
isUnwindContext |
|
2415 |
"return true, if this is an unwindContext" |
|
2416 |
||
2417 |
%{ /* NOCONTEXT */ |
|
1133 | 2418 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__UNWIND_MARK)) ? true : false ); |
1051 | 2419 |
%} |
8578 | 2420 |
! |
2421 |
||
2422 |
tempNames |
|
2423 |
"helper: given a context, return a collection of arg, var and temporary names" |
|
2424 |
||
2425 |
|names nTemps| |
|
2426 |
||
2427 |
names := self argAndVarNames. |
|
2428 |
(nTemps := self numTemps) > 0 ifTrue:[ |
|
2429 |
^ names , ((1 to:nTemps) collect:[:idx | '_tmp' , idx printString]). |
|
2430 |
]. |
|
2431 |
^ names. |
|
1051 | 2432 |
! ! |
2433 |
||
623 | 2434 |
!Context methodsFor:'testing'! |
2435 |
||
2436 |
isBlockContext |
|
2437 |
"return true, iff the receiver is a BlockContext, false otherwise" |
|
2438 |
||
2439 |
^ false |
|
2440 |
! |
|
2441 |
||
14214 | 2442 |
isCheapBlockContext |
2443 |
"return true, iff the receiver is a BlockContext, for a cheap block, false otherwise. |
|
2444 |
Cheap blocks do not refer to their home" |
|
2445 |
||
2446 |
^ false |
|
2447 |
||
2448 |
"Created: / 19-07-2012 / 11:22:38 / cg" |
|
2449 |
! |
|
2450 |
||
623 | 2451 |
isContext |
2452 |
"return true, iff the receiver is a Context, false otherwise" |
|
2453 |
||
2454 |
^ true |
|
2455 |
! |
|
2456 |
||
2457 |
isRecursive |
|
2458 |
"return true, if this context is one of a recursive send of the same |
|
1483 | 2459 |
selector to the same receiver before. |
2460 |
Here, different arguments are ignored - i.e. only the same method |
|
2461 |
counts for recursiveness. |
|
623 | 2462 |
Used to detect recursive errors or recursive printing - for example." |
2463 |
||
2291
af7652b82404
avoid touching contexts (making them nonLifo) when searching for unwind-contexts,
Claus Gittinger <cg@exept.de>
parents:
2285
diff
changeset
|
2464 |
|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
|
2465 |
|
af7652b82404
avoid touching contexts (making them nonLifo) when searching for unwind-contexts,
Claus Gittinger <cg@exept.de>
parents:
2285
diff
changeset
|
2466 |
count := 0. |
af7652b82404
avoid touching contexts (making them nonLifo) when searching for unwind-contexts,
Claus Gittinger <cg@exept.de>
parents:
2285
diff
changeset
|
2467 |
|
2893 | 2468 |
c := self findNextContextWithSelector:selector or:nil or:nil. |
623 | 2469 |
[c notNil] whileTrue:[ |
12841 | 2470 |
(c receiver == receiver) ifTrue:[ |
2471 |
" |
|
2472 |
stupid: the current ST/X context does not include |
|
2473 |
the method, but the class, in which the search started ... |
|
2474 |
" |
|
2475 |
myMethodsClass isNil ifTrue:[ |
|
2476 |
myMethodsClass := self methodClass. |
|
2477 |
]. |
|
2478 |
c methodClass == myMethodsClass ifTrue:[ |
|
2479 |
^ true |
|
2480 |
] |
|
2481 |
]. |
|
2482 |
c := c findNextContextWithSelector:selector or:nil or:nil. |
|
2483 |
||
2484 |
" |
|
2485 |
this special test was added to get out after a while |
|
2486 |
if the sender chain is corrupt - this gives us at least |
|
2487 |
a chance to find those errors. |
|
2488 |
" |
|
2489 |
count := count + 1. |
|
2490 |
count >= 100000 ifTrue:[ |
|
2491 |
'Context [warning]: bad context chain' errorPrintCR. |
|
2492 |
^ true |
|
2493 |
] |
|
623 | 2494 |
]. |
2495 |
^ false |
|
1483 | 2496 |
|
2135
6bd144c1c358
newStyle info & error messages
Claus Gittinger <cg@exept.de>
parents:
1853
diff
changeset
|
2497 |
"Modified: 10.1.1997 / 17:34:26 / cg" |
623 | 2498 |
! ! |
2499 |
||
1810 | 2500 |
!Context class methodsFor:'documentation'! |
749 | 2501 |
|
14418
6558e5c3b32e
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
14413
diff
changeset
|
2502 |
version |
15388 | 2503 |
^ '$Header: /cvs/stx/stx/libbasic/Context.st,v 1.186 2013-06-09 20:40:08 cg Exp $' |
14418
6558e5c3b32e
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
14413
diff
changeset
|
2504 |
! |
6558e5c3b32e
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
14413
diff
changeset
|
2505 |
|
13426 | 2506 |
version_CVS |
15388 | 2507 |
^ '$Header: /cvs/stx/stx/libbasic/Context.st,v 1.186 2013-06-09 20:40:08 cg Exp $' |
12573 | 2508 |
! |
2509 |
||
13426 | 2510 |
version_SVN |
15232 | 2511 |
^ '$ Id: Context.st 10643 2011-06-08 21:53:07Z vranyj1 $' |
749 | 2512 |
! ! |
7257 | 2513 |
|
14700 | 2514 |
|
623 | 2515 |
Context initialize! |