author | convert-repo |
Thu, 05 Jul 2018 03:33:35 +0000 | |
changeset 23197 | 823c765c176d |
parent 23133 | 6db5c28207d5 |
child 23224 | 871ea64fd5dc |
permissions | -rw-r--r-- |
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"{ Encoding: utf8 }" |
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" |
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COPYRIGHT (c) 1988 by Claus Gittinger |
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All Rights Reserved |
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This software is furnished under a license and may be used |
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only in accordance with the terms of that license and with the |
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inclusion of the above copyright notice. This software may not |
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be provided or otherwise made available to, or used by, any |
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added method-in-context slot.
Claus Gittinger <cg@exept.de>
parents:
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diff
changeset
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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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"{ NameSpace: Smalltalk }" |
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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:'SingleStepInterruptRequest MaxRecursion' |
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poolDictionaries:'' |
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category:'Kernel-Methods' |
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! |
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!Context class methodsFor:'documentation'! |
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copyright |
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" |
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COPYRIGHT (c) 1988 by Claus Gittinger |
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All Rights Reserved |
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This software is furnished under a license and may be used |
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only in accordance with the terms of that license and with the |
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inclusion of the above copyright notice. This software may not |
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be provided or otherwise made available to, or used by, any |
|
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other person. No t itle to or ownership of the software is |
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hereby transferred. |
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" |
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! |
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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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accessible via the pseuodoVariable called 'thisContext'. |
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The actual implementation uses the machine's stack for this, building real |
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contexts on demand only, whenever a context is needed. Also, initially these are |
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allocated on the stack and only moved to the heap, when a context outlives its |
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activation. |
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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 it's a nested block) or of |
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its home method. |
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||
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Cheap blocks are blocks which do not refer to any locals or the receiver (currently), |
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but only access globals, class vars or arguments (for example: [:a :b | a < b] is a cheap block). |
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Cheap blocks do not need a home and therefore never require that their home context be moved |
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to the heap. Contexts of cheap blocks do not have a home context - their home field is also nil. |
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|
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LineNumbers vs. program counter: |
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Due to the compilation to machine code, methods and/or block do not |
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always (actually: do seldom) contain bytecodes. Thus, there is no such concept |
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as a bytecode p-counter. To support debugging, the linenumber within the |
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original source is instead remembered when a send or loop entry is performed. |
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Since linenumbers are not always sufficient for debugging (multiple sends in one |
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line), this may be changed in future versions to a character offset, giving |
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the position of the selector in the source. |
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Restartable / Returnable contexts: |
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In previous versions (up to ST/X 2.10.5), every method stored enough |
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information in the context for that one to be restartable later (for example, |
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via the debugger's restart button). As stc is supposed to generate portable C-code, |
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this means that technically, a setjmp needs to be done at the beginning of the method |
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in order to have a resumable (and portable) state (however, inline asm code does this setjmp, |
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so it is much faster than the libc-setjmo, which stores a lot of additional state, not needed here). |
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With 2.10.6, this is now an stc-compiler option, and the system as delivered is compiled |
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to only create restartable contexts for those which contain blocks or are marked as special |
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via a directive. |
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This resulted in an overall speedup of roughly 10-20% percent, depending on the type of CPU. |
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However, it makes most methods non-restartable (however, abort, signal handling and unwind blocks |
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work 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, you 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 (because the setjmp is |
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not done on the caller side, but in the callee). |
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However, 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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Block-return 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 - a good decision, as it makes debugging much easier. |
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[instance variables:] |
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flags <SmallInteger> used by the VM; never touch. |
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contains info about number of args, |
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locals and temporaries. |
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sender <Context> the 'calling / sending' context |
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This is not directly accessible, 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 accessible, 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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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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"/ context searchers (eg. isRecursive) will stop searching after |
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"/ this many call levels and assume, that something is wrong with the |
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"/ calling chain. |
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MaxRecursion := 10000. |
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"Modified: / 17-09-2017 / 10:00:19 / cg" |
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! ! |
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!Context class methodsFor:'Signal constants'! |
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cannotResumeSignal |
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"return the signal used when a method is tried to be resumed, which cannot" |
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^ CannotResumeError |
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! |
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cannotReturnSignal |
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"return the signal used when a method is tried to be returned twice |
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or, when some dead context is unwound or restarted." |
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^ CannotReturnError |
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! |
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invalidReturnSignal |
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"return the signal used when a method is tried to be returned twice |
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or, when some dead context is unwound or restarted." |
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<resource: #obsolete> |
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self obsoleteMethodWarning:'use #cannotReturnSignal'. |
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^ self cannotReturnSignal. |
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! |
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allow different implementations of singleStep (JAVA support)
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parents:
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|
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allow different implementations of singleStep (JAVA support)
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singleStepInterruptRequest |
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"return the dummy query signal to ask for single stepping" |
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parents:
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allow different implementations of singleStep (JAVA support)
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^ SingleStepInterruptRequest |
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|
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allow different implementations of singleStep (JAVA support)
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parents:
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"Created: 6.5.1996 / 16:46:32 / cg" |
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! ! |
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!Context class methodsFor:'error handling'! |
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221 |
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, |
224 |
which non-collection send invoked a bad collection-method)." |
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|con count| |
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228 |
con := thisContext sender sender. |
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count := 0. |
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[ |
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(' from ' , con printString) errorPrintCR. |
232 |
con := con sender. |
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count := count + 1. |
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] doWhile:[con notNil and:[count < 5 or:[con receiver isCollection]]]. |
235 |
"/ 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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240 |
" |
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#() asSet add:nil |
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" |
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! ! |
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||
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!Context class methodsFor:'queries'! |
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isBuiltInClass |
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"return true if this class is known by the run-time-system. |
249 |
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'! |
257 |
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258 |
findFirstSpecialHandle:searchForHandle raise:searchForRaise |
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|c| |
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260 |
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%{ |
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#ifdef __SCHTEAM__ |
263 |
c = __c__.currentContinuation.sender(); |
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if (c == null) c = STObject.Nil; |
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#else |
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OBJ __c__; |
267 |
||
268 |
__c__ = __ContextInstPtr(__thisContext)->c_sender; |
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269 |
if (!__isNonNilObject(__c__)) { |
15933 | 270 |
RETURN(nil) |
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271 |
} |
4485 | 272 |
if (__isLazy(__c__)) { |
15933 | 273 |
__PATCHUPCONTEXT(__c__); |
4485 | 274 |
} |
275 |
c = __c__; |
|
18190 | 276 |
#endif |
4485 | 277 |
%}. |
278 |
^ c findSpecialHandle:searchForHandle raise:searchForRaise |
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279 |
! ! |
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280 |
||
12573 | 281 |
!Context methodsFor:'Compatibility-Squeak'! |
282 |
||
283 |
longStack |
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15644 | 284 |
^ self fullPrintAllString |
12573 | 285 |
! ! |
286 |
||
7261 | 287 |
!Context methodsFor:'Compatibility-VW'! |
5983 | 288 |
|
289 |
resumeWith:value |
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290 |
"same as #resume: - visualWorks compatibility" |
|
291 |
||
292 |
self resume:value |
|
293 |
! ! |
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294 |
||
623 | 295 |
!Context methodsFor:'accessing'! |
296 |
||
16489 | 297 |
arg1Index |
16544 | 298 |
"return the index of the 1st arg (redefined in JavaContext)" |
299 |
||
300 |
^ 1 |
|
16489 | 301 |
! |
302 |
||
623 | 303 |
argAt:n |
304 |
"return the n'th argument" |
|
305 |
||
18437 | 306 |
n > self argumentCount ifTrue:[ |
307 |
^ self subscriptBoundsError:n. |
|
1726 | 308 |
]. |
623 | 309 |
^ self at:n |
1726 | 310 |
|
311 |
"Modified: 12.10.1996 / 21:44:28 / cg" |
|
623 | 312 |
! |
313 |
||
314 |
argAt:n put:value |
|
315 |
"set the n'th argument - useful when the receiver should be restarted" |
|
154 | 316 |
|
18437 | 317 |
n > self argumentCount ifTrue:[ |
318 |
^ self subscriptBoundsError:n. |
|
1726 | 319 |
]. |
4477
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better #unwind - ask receiver for handler block
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320 |
self at:n put:value. |
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parents:
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|
321 |
^ value |
1726 | 322 |
|
323 |
"Modified: 12.10.1996 / 21:44:32 / cg" |
|
623 | 324 |
! |
325 |
||
326 |
args |
|
327 |
"return an array filled with the arguments of this context" |
|
328 |
||
329 |
|n| |
|
330 |
||
18437 | 331 |
n := self argumentCount. |
3130 | 332 |
n == 0 ifTrue:[ |
18437 | 333 |
"/ little optimization here - avaoid creating empty containers |
334 |
^ #() |
|
3130 | 335 |
]. |
623 | 336 |
^ (Array new:n) replaceFrom:1 to:n with:self. |
337 |
! |
|
154 | 338 |
|
623 | 339 |
argsAndVars |
340 |
"return an array filled with the arguments and variables of this context" |
|
341 |
||
342 |
|n| |
|
343 |
||
18437 | 344 |
n := self argumentCount + self numVars. |
3130 | 345 |
n == 0 ifTrue:[ |
18437 | 346 |
"/ little optimization here - avoid creating empty containers |
347 |
^ #() |
|
3130 | 348 |
]. |
623 | 349 |
^ (Array new:n) replaceFrom:1 to:n with:self. |
1810 | 350 |
|
351 |
"Modified: 23.10.1996 / 16:19:41 / cg" |
|
623 | 352 |
! |
154 | 353 |
|
8687
d6e6e2c0c27c
Define #argumentCount as ANSI alias for #numArgs
Stefan Vogel <sv@exept.de>
parents:
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diff
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|
354 |
argumentCount |
d6e6e2c0c27c
Define #argumentCount as ANSI alias for #numArgs
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parents:
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diff
changeset
|
355 |
"ANSI alias for numArgs: return the number of arguments to the Block/Method" |
d6e6e2c0c27c
Define #argumentCount as ANSI alias for #numArgs
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parents:
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diff
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|
356 |
|
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|
357 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
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parents:
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diff
changeset
|
358 |
#ifdef __SCHTEAM__ |
18289 | 359 |
return context._RETURN( STInteger._new( self.asSTContinuation().numStArgs() ) ); |
18190 | 360 |
#else |
8913 | 361 |
RETURN ( __mkSmallInteger( (__intVal(__INST(flags)) >> __NARG_SHIFT) & __NARG_MASK) ); |
18190 | 362 |
#endif |
8687
d6e6e2c0c27c
Define #argumentCount as ANSI alias for #numArgs
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parents:
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|
363 |
%} |
d6e6e2c0c27c
Define #argumentCount as ANSI alias for #numArgs
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parents:
8578
diff
changeset
|
364 |
! |
d6e6e2c0c27c
Define #argumentCount as ANSI alias for #numArgs
Stefan Vogel <sv@exept.de>
parents:
8578
diff
changeset
|
365 |
|
7324
9e145a7ae670
need unfix, when changed via at:put:
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parents:
7261
diff
changeset
|
366 |
at:n put:value |
9e145a7ae670
need unfix, when changed via at:put:
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parents:
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diff
changeset
|
367 |
super at:n put:value. |
9e145a7ae670
need unfix, when changed via at:put:
Claus Gittinger <cg@exept.de>
parents:
7261
diff
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|
368 |
|
9e145a7ae670
need unfix, when changed via at:put:
Claus Gittinger <cg@exept.de>
parents:
7261
diff
changeset
|
369 |
"/ need some aid for optimized code - |
9e145a7ae670
need unfix, when changed via at:put:
Claus Gittinger <cg@exept.de>
parents:
7261
diff
changeset
|
370 |
"/ some machines have the arguments/receiver etc. kept in register vars ... |
9e145a7ae670
need unfix, when changed via at:put:
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parents:
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diff
changeset
|
371 |
"/ the unfix updates the machine-stack version of the receiver. |
9e145a7ae670
need unfix, when changed via at:put:
Claus Gittinger <cg@exept.de>
parents:
7261
diff
changeset
|
372 |
%{ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
373 |
#ifndef __SCHTEAM__ |
7324
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need unfix, when changed via at:put:
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parents:
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diff
changeset
|
374 |
__UNFIXCONTEXT(self, 0); |
18190 | 375 |
#endif |
7324
9e145a7ae670
need unfix, when changed via at:put:
Claus Gittinger <cg@exept.de>
parents:
7261
diff
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|
376 |
%}. |
9e145a7ae670
need unfix, when changed via at:put:
Claus Gittinger <cg@exept.de>
parents:
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|
377 |
^ value |
9e145a7ae670
need unfix, when changed via at:put:
Claus Gittinger <cg@exept.de>
parents:
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diff
changeset
|
378 |
! |
9e145a7ae670
need unfix, when changed via at:put:
Claus Gittinger <cg@exept.de>
parents:
7261
diff
changeset
|
379 |
|
623 | 380 |
home |
381 |
"return the immediate home of the receiver. |
|
382 |
for block contexts, this is the methodcontext, where the block was created, |
|
15688 | 383 |
for nested block contexts, it's the surrounding block's context. |
623 | 384 |
for method-contexts this is nil." |
25 | 385 |
|
623 | 386 |
^ nil "home" |
387 |
! |
|
1 | 388 |
|
3324
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
389 |
homeReceiver |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
390 |
"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
|
391 |
|
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
392 |
^ receiver |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
393 |
|
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
394 |
"Created: / 5.3.1998 / 16:18:26 / stefan" |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
395 |
! |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
396 |
|
1 | 397 |
instVarAt:index |
69 | 398 |
"have to catch instVar access to retVal and handle - they are invalid. |
12841 | 399 |
Notice, that one of the next ST/X versions might get some syntactic |
69 | 400 |
extension to get this automatically)." |
1 | 401 |
|
18190 | 402 |
|what| |
403 |
||
404 |
%{ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
405 |
#ifdef __SCHTEAM__ |
18214
60e1764add21
oops - some bugs introduced by java support code
Claus Gittinger <cg@exept.de>
parents:
18190
diff
changeset
|
406 |
{ |
18406 | 407 |
int idx = index.intValue("[instVarAt:]"); |
18214
60e1764add21
oops - some bugs introduced by java support code
Claus Gittinger <cg@exept.de>
parents:
18190
diff
changeset
|
408 |
|
60e1764add21
oops - some bugs introduced by java support code
Claus Gittinger <cg@exept.de>
parents:
18190
diff
changeset
|
409 |
if (idx == I_sender) { |
18406 | 410 |
STContinuation c = self.sender(); |
411 |
if (c == null) { |
|
412 |
return __c__._RETURN_nil(); |
|
413 |
} |
|
414 |
return __c__._RETURN( c ); |
|
18214
60e1764add21
oops - some bugs introduced by java support code
Claus Gittinger <cg@exept.de>
parents:
18190
diff
changeset
|
415 |
} |
60e1764add21
oops - some bugs introduced by java support code
Claus Gittinger <cg@exept.de>
parents:
18190
diff
changeset
|
416 |
if (idx == I_retvalTemp) { |
18406 | 417 |
return __c__._RETURN( Nil ); |
18214
60e1764add21
oops - some bugs introduced by java support code
Claus Gittinger <cg@exept.de>
parents:
18190
diff
changeset
|
418 |
} |
60e1764add21
oops - some bugs introduced by java support code
Claus Gittinger <cg@exept.de>
parents:
18190
diff
changeset
|
419 |
if (idx == I_handle) { |
18406 | 420 |
return __c__._RETURN( Nil ); |
18214
60e1764add21
oops - some bugs introduced by java support code
Claus Gittinger <cg@exept.de>
parents:
18190
diff
changeset
|
421 |
} |
60e1764add21
oops - some bugs introduced by java support code
Claus Gittinger <cg@exept.de>
parents:
18190
diff
changeset
|
422 |
} |
18190 | 423 |
#else |
424 |
if (index == __MKSMALLINT(__SLOT_CONTEXT_SENDER)) { // sender - must be accessed specially |
|
425 |
what = @symbol(sender); |
|
426 |
} else if (index == __MKSMALLINT(__SLOT_CONTEXT_RETVAL)) { // retvalTemp - invisible |
|
427 |
RETURN (nil); |
|
428 |
} else if (index == __MKSMALLINT(__SLOT_CONTEXT_HANDLE)) { // handle to machine stack - invisible |
|
429 |
RETURN (nil); |
|
430 |
} |
|
431 |
#endif |
|
432 |
%}. |
|
18214
60e1764add21
oops - some bugs introduced by java support code
Claus Gittinger <cg@exept.de>
parents:
18190
diff
changeset
|
433 |
what == #sender ifTrue:[ |
60e1764add21
oops - some bugs introduced by java support code
Claus Gittinger <cg@exept.de>
parents:
18190
diff
changeset
|
434 |
^ self sender |
60e1764add21
oops - some bugs introduced by java support code
Claus Gittinger <cg@exept.de>
parents:
18190
diff
changeset
|
435 |
]. |
1 | 436 |
^ super instVarAt:index |
437 |
! |
|
438 |
||
439 |
instVarAt:index put:value |
|
69 | 440 |
"have to catch instVar access to retVal and handle - they are invalid. |
12841 | 441 |
Notice, that one of the next ST/X versions might get some syntactic |
69 | 442 |
extension to get this automatically)." |
1 | 443 |
|
18190 | 444 |
%{ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
445 |
#ifdef __SCHTEAM__ |
18190 | 446 |
ERROR("unimplemented"); |
447 |
#else |
|
448 |
if (index == __MKSMALLINT(__SLOT_CONTEXT_SENDER)) { // sender - not allowed to change |
|
449 |
RETURN (nil); |
|
450 |
} else if (index == __MKSMALLINT(__SLOT_CONTEXT_RETVAL)) { // retvalTemp - not allowed to change |
|
451 |
RETURN (nil); |
|
452 |
} else if (index == __MKSMALLINT(__SLOT_CONTEXT_HANDLE)) { // handle to machine stack - not allowed to change |
|
453 |
RETURN (nil); |
|
454 |
} |
|
455 |
#endif |
|
456 |
%}. |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
457 |
super instVarAt:index put:value. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
458 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
459 |
"/ need some aid for optimized code - |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
460 |
"/ 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
|
461 |
"/ 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
|
462 |
%{ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
463 |
#ifndef __SCHTEAM__ |
4570 | 464 |
__UNFIXCONTEXT(self, 0); |
18190 | 465 |
#endif |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
466 |
%}. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
467 |
^ value |
1 | 468 |
! |
469 |
||
623 | 470 |
lineNumber |
22368 | 471 |
"this returns the lineNumber within the method's source, where the context was |
623 | 472 |
interrupted or called another method. (currently, sometimes this information |
473 |
is not available - in this case 0 is returned)" |
|
1 | 474 |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
475 |
|l| |
3923 | 476 |
|
4328
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
477 |
receiver isJavaObject ifTrue:[ |
21923 | 478 |
"/ chances are good that I am a javaContext ... |
479 |
self method isJavaMethod ifTrue:[ |
|
480 |
^ self javaLineNumber |
|
481 |
] |
|
4328
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
482 |
]. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
483 |
|
3923 | 484 |
lineNr notNil ifTrue:[ |
21923 | 485 |
l := lineNr bitAnd:16rFFFF. |
3923 | 486 |
]. |
487 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
488 |
"/ self isJavaContext ifTrue:[ |nr m| |
3923 | 489 |
"/ m := self method. |
490 |
"/ l isNil ifTrue:[ |
|
491 |
"/ m notNil ifTrue:[ |
|
492 |
"/ nr := m lineNumber |
|
493 |
"/ ]. |
|
494 |
"/ nr notNil ifTrue:[ |
|
495 |
"/ ^ nr |
|
496 |
"/ ]. |
|
497 |
"/ ^0 |
|
498 |
"/ ]. |
|
499 |
"/ nr := self method lineNumberForPC:l. |
|
500 |
"/ nr isNil ifTrue:[ |
|
501 |
"/ m notNil ifTrue:[ |
|
502 |
"/ nr := m lineNumber |
|
503 |
"/ ]. |
|
504 |
"/ nr notNil ifTrue:[ |
|
505 |
"/ ^ nr |
|
506 |
"/ ]. |
|
507 |
"/ ^ 0 |
|
508 |
"/ ]. |
|
509 |
"/ ^ nr. |
|
510 |
"/ ]. |
|
511 |
||
512 |
^ l |
|
513 |
||
22368 | 514 |
"Modified: / 10-11-1998 / 13:19:48 / cg" |
515 |
"Modified (comment): / 21-11-2017 / 13:00:40 / cg" |
|
1 | 516 |
! |
517 |
||
4450 | 518 |
lineNumberFromMethod |
519 |
^ 1 |
|
520 |
! |
|
521 |
||
8488 | 522 |
message |
523 |
^ Message selector:selector arguments:self args |
|
524 |
||
525 |
" |
|
9355 | 526 |
thisContext methodHome message |
527 |
thisContext message |
|
8488 | 528 |
" |
529 |
! |
|
530 |
||
15851 | 531 |
messageSend |
532 |
^ MessageSend receiver:receiver selector:selector arguments:self args |
|
533 |
||
534 |
" |
|
535 |
thisContext methodHome messageSend |
|
536 |
thisContext messageSend |
|
537 |
" |
|
538 |
! |
|
539 |
||
1 | 540 |
method |
54 | 541 |
"return the method for which the receiver was created. |
13020 | 542 |
Change with ST/X vsn 6: |
15933 | 543 |
In older versions, the method was not stored in the context, but a lookup |
544 |
was simulated using selector and class. |
|
545 |
(which occasionally returned the wrong method - especially in the debugger, |
|
546 |
when the debugged method was changed). |
|
547 |
This has been changed - especially to support Jan's meta-object protocol. |
|
548 |
It is now stored in the context" |
|
1 | 549 |
|
3508 | 550 |
|c sender sendersSelector m| |
14225 | 551 |
|
552 |
(method notNil and:[method isMethod]) ifTrue:[ |
|
15933 | 553 |
^ method |
14225 | 554 |
]. |
555 |
||
556 |
"mhmh - maybe I am a context for an unbound method (as generated by doIt); |
|
557 |
look in the sender's context. Consider this a kludge. |
|
558 |
Future versions of ST/X's message lookup may store the method in |
|
559 |
the context. |
|
560 |
" |
|
561 |
sender := self sender. |
|
562 |
sender notNil ifTrue:[ |
|
15933 | 563 |
sendersSelector := sender selector. |
564 |
sendersSelector notNil ifTrue:[ |
|
565 |
(sendersSelector startsWith:'valueWithReceiver:') ifTrue:[ |
|
566 |
m := sender receiver. |
|
567 |
m isMethod ifTrue:[ |
|
568 |
method := m. |
|
569 |
^ m |
|
570 |
] |
|
571 |
] |
|
572 |
] |
|
12853
3d15dcbe0057
added method-in-context slot.
Claus Gittinger <cg@exept.de>
parents:
12841
diff
changeset
|
573 |
]. |
12841 | 574 |
|
325 | 575 |
c := self searchClass. |
576 |
" |
|
577 |
the below cannot happen in normal circumstances |
|
578 |
(added to avoid recursive errors in case of a broken sender chain) |
|
579 |
" |
|
580 |
c isBehavior ifFalse:[ |
|
15933 | 581 |
'Context [error]: non class in searchClass' errorPrintCR. |
582 |
' selector: ' errorPrint. selector errorPrint. |
|
583 |
' receiver: ' errorPrint. receiver errorPrintCR. |
|
584 |
^ nil |
|
325 | 585 |
]. |
586 |
||
328 | 587 |
c := c whichClassIncludesSelector:selector. |
1 | 588 |
c notNil ifTrue:[ |
15933 | 589 |
method := c compiledMethodAt:selector. |
590 |
^ method |
|
1 | 591 |
]. |
216 | 592 |
|
1 | 593 |
^ nil |
2135
6bd144c1c358
newStyle info & error messages
Claus Gittinger <cg@exept.de>
parents:
1853
diff
changeset
|
594 |
|
13426 | 595 |
"Modified: / 28-06-2011 / 20:23:05 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
14225 | 596 |
"Modified: / 20-07-2012 / 14:46:37 / cg" |
1 | 597 |
! |
598 |
||
212 | 599 |
methodClass |
600 |
"return the class in which the method for which the receiver was created is." |
|
601 |
||
1456 | 602 |
|cls m| |
603 |
||
12853
3d15dcbe0057
added method-in-context slot.
Claus Gittinger <cg@exept.de>
parents:
12841
diff
changeset
|
604 |
method notNil ifTrue:[ |
15933 | 605 |
method isMethod ifTrue:[ |
606 |
^ method mclass |
|
607 |
] |
|
12853
3d15dcbe0057
added method-in-context slot.
Claus Gittinger <cg@exept.de>
parents:
12841
diff
changeset
|
608 |
]. |
12841 | 609 |
|
1456 | 610 |
cls := self searchClass. |
3923 | 611 |
(cls isMeta |
612 |
and:[cls soleInstance isJavaClass]) ifTrue:[ |
|
15933 | 613 |
cls := cls soleInstance |
3923 | 614 |
]. |
1456 | 615 |
|
3923 | 616 |
[cls notNil] whileTrue:[ |
15933 | 617 |
cls := cls whichClassIncludesSelector:selector. |
618 |
cls isNil ifTrue:[^ nil]. |
|
619 |
||
620 |
m := cls compiledMethodAt:selector. |
|
621 |
m notNil ifTrue:[ |
|
622 |
m isIgnored ifFalse:[^ cls]. |
|
623 |
]. |
|
624 |
cls := cls superclass |
|
1456 | 625 |
]. |
626 |
^ cls |
|
627 |
||
3923 | 628 |
"Modified: / 5.11.1998 / 19:07:43 / cg" |
212 | 629 |
! |
630 |
||
623 | 631 |
methodHome |
632 |
"return the method-home - for method contexts this is the receiver" |
|
633 |
||
634 |
^ self |
|
635 |
! |
|
636 |
||
15091 | 637 |
methodSelector |
638 |
"return the method's (or home method's) selector" |
|
639 |
||
640 |
^ self methodHome selector |
|
641 |
! |
|
642 |
||
623 | 643 |
ntemp |
644 |
"return the number of temporary variables of the Block/Method. |
|
1810 | 645 |
(for debugging only). |
20792 | 646 |
I don't like the name of this method; its here for compatibility." |
623 | 647 |
|
1810 | 648 |
^ self numTemps |
649 |
||
650 |
"Modified: 23.10.1996 / 16:19:06 / cg" |
|
623 | 651 |
! |
652 |
||
653 |
numArgs |
|
654 |
"return the number of arguments to the Block/Method" |
|
655 |
||
656 |
%{ /* NOCONTEXT */ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
657 |
#ifdef __SCHTEAM__ |
18289 | 658 |
return context._RETURN(STInteger._new(self.asSTContinuation().numStArgs())); |
18190 | 659 |
#else |
8913 | 660 |
RETURN ( __mkSmallInteger( (__intVal(__INST(flags)) >> __NARG_SHIFT) & __NARG_MASK) ); |
18190 | 661 |
#endif |
623 | 662 |
%} |
663 |
! |
|
664 |
||
1810 | 665 |
numTemps |
666 |
"return the number of temporary variables of the Block/Method. |
|
667 |
(for debugging only)" |
|
668 |
||
18437 | 669 |
^ self size - self argumentCount - self numVars |
1810 | 670 |
|
671 |
"Created: 23.10.1996 / 16:19:10 / cg" |
|
672 |
"Modified: 23.10.1996 / 16:19:48 / cg" |
|
673 |
! |
|
674 |
||
675 |
numVars |
|
623 | 676 |
"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
|
677 |
|
623 | 678 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
679 |
#ifdef __SCHTEAM__ |
18289 | 680 |
return context._RETURN(STInteger._new(self.asSTContinuation().numLocals(context))); |
18190 | 681 |
#else |
8913 | 682 |
RETURN ( __mkSmallInteger( (__intVal(__INST(flags)) >> __NVAR_SHIFT) & __NVAR_MASK) ); |
18190 | 683 |
#endif |
623 | 684 |
%} |
685 |
! |
|
686 |
||
1810 | 687 |
nvars |
688 |
"return the number of local variables of the Block/Method. |
|
20792 | 689 |
I don't like the name of this method; its here for compatibility." |
1810 | 690 |
|
691 |
^ self numVars |
|
692 |
||
693 |
"Modified: 23.10.1996 / 16:18:44 / cg" |
|
694 |
! |
|
695 |
||
13426 | 696 |
programmingLanguage |
697 |
||
15933 | 698 |
^method notNil |
699 |
ifTrue:[method programmingLanguage] |
|
700 |
ifFalse:[SmalltalkLanguage instance] |
|
13426 | 701 |
|
702 |
"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
|
703 |
"Modified (format): / 02-08-2011 / 09:23:39 / cg" |
13426 | 704 |
! |
705 |
||
623 | 706 |
receiver |
707 |
"return the receiver of the context" |
|
18253 | 708 |
%{ /* NOCONTEXT */ |
709 |
#ifdef __SCHTEAM__ |
|
18289 | 710 |
return context._RETURN( self.asSTContinuation().stSelf(context) ); |
18253 | 711 |
#endif |
712 |
%}. |
|
623 | 713 |
^ receiver |
714 |
! |
|
715 |
||
4543 | 716 |
receiver:aCompiledCode |
717 |
"set the receiver of the message" |
|
718 |
||
4560
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
719 |
receiver := aCompiledCode. |
4543 | 720 |
|
4560
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
721 |
"/ need some aid for optimized code - |
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
722 |
"/ some machines have the arguments kept in register vars ... |
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
723 |
"/ 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
|
724 |
%{ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
725 |
#ifdef __SCHTEAM__ |
18190 | 726 |
ERROR("unimplemented"); |
727 |
#else |
|
4570 | 728 |
__UNFIXCONTEXT(self, 0); |
18190 | 729 |
#endif |
4560
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
730 |
%}. |
4543 | 731 |
|
732 |
! |
|
733 |
||
623 | 734 |
searchClass |
735 |
"this is the class where the method-lookup started; |
|
19448 | 736 |
for normal sends, it is nil (or sometimes the receiver's class). |
623 | 737 |
For supersends, its the superclass of the one, in which the |
738 |
caller was defined." |
|
739 |
||
740 |
searchClass notNil ifTrue:[^ searchClass]. |
|
741 |
^ receiver class |
|
742 |
! |
|
743 |
||
744 |
selector |
|
745 |
"return the selector of the method for which the context was created" |
|
746 |
||
747 |
^ selector |
|
536
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
748 |
! |
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
749 |
|
1 | 750 |
sender |
751 |
"return the sender of the context" |
|
752 |
||
536
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
753 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
754 |
#ifdef __SCHTEAM__ |
18406 | 755 |
STContinuation sender = self.sender(); |
756 |
if (sender == null) { |
|
757 |
return __c__._RETURN_nil(); |
|
758 |
} |
|
759 |
return __c__._RETURN(sender); |
|
18253 | 760 |
/* NOTREACHED */ |
18190 | 761 |
#else |
1668
41db5950f9ea
oops - con local variables are now renamed (last change in stc)
Claus Gittinger <cg@exept.de>
parents:
1492
diff
changeset
|
762 |
OBJ theContext; |
536
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
763 |
|
3508 | 764 |
theContext = __INST(sender_); |
949 | 765 |
/* |
766 |
* this special nil test is for the very first context (startup-context); |
|
767 |
* actually, its cosmetics, to avoid a visible nil>>nil context in the debugger. |
|
768 |
*/ |
|
2205 | 769 |
if (__isNonNilObject(theContext)) { |
949 | 770 |
|
15933 | 771 |
if (__isLazy(theContext)) { |
772 |
/* |
|
773 |
* this cannot happen |
|
774 |
*/ |
|
775 |
__PATCHUPCONTEXT(theContext); |
|
776 |
} |
|
777 |
if (! __isNonLIFO(theContext)) { |
|
778 |
/* |
|
779 |
* to be prepared for the worst situation |
|
780 |
* (the sender is not stored, so the trap won't catch it) |
|
781 |
* make the writeBarrier trigger manually. |
|
782 |
* We'll see, if this is really required. |
|
783 |
*/ |
|
784 |
theContext->o_space |= CATCHMARK; |
|
785 |
__markNonLIFO(theContext); |
|
786 |
} |
|
536
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
787 |
} |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
788 |
RETURN (theContext); |
18190 | 789 |
#endif |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
790 |
%} |
1 | 791 |
! |
792 |
||
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
793 |
senderIsNil |
15319 | 794 |
"return true, if I have no sender. |
795 |
This little ugly piece of code is needed (instead of the obvious |
|
796 |
'sender isNil') because sender is a protected field, which cannot be |
|
797 |
directly accessed by smalltalk code. The reason is that the sender field |
|
798 |
is lazily filled in by the VM, in the sender-accessor, and is usually |
|
799 |
invalid until needed." |
|
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
800 |
|
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
801 |
%{ /* NOCONTEXT */ |
18412 | 802 |
#ifdef __SCHTEAM__ |
803 |
if (((STContinuation)self).caller == null) { |
|
804 |
return __c__._RETURN_true(); |
|
805 |
} |
|
806 |
return __c__._RETURN_false(); |
|
807 |
/* NOTREACHED */ |
|
808 |
#else |
|
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
809 |
if ( __INST(sender_) == nil ) { |
15933 | 810 |
RETURN (true); |
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
811 |
} |
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
812 |
RETURN (false); |
18412 | 813 |
#endif |
5422 | 814 |
%}. |
18289 | 815 |
^ self sender isNil |
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
816 |
! |
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
817 |
|
623 | 818 |
setLineNumber:aNumber |
819 |
"private entry for uncompiledCodeObject ..." |
|
1 | 820 |
|
623 | 821 |
lineNr := aNumber |
340 | 822 |
! |
823 |
||
5749 | 824 |
setNumArgs:nA numVars:nV |
825 |
"set the number of arguments and variables" |
|
826 |
||
827 |
%{ /* NOCONTEXT */ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
828 |
#ifdef __SCHTEAM__ |
18190 | 829 |
ERROR("unimplemented"); |
830 |
#else |
|
8910 | 831 |
INT flg; |
5749 | 832 |
|
833 |
flg = __intVal(__INST(flags)); |
|
834 |
flg = flg & ~(__NARG_MASK << __NARG_SHIFT); |
|
835 |
flg = flg & ~(__NVAR_MASK << __NVAR_SHIFT); |
|
836 |
flg = flg | __intVal(nA) << __NARG_SHIFT; |
|
837 |
flg = flg | __intVal(nV) << __NVAR_SHIFT; |
|
8913 | 838 |
__INST(flags) = __mkSmallInteger(flg); |
18190 | 839 |
#endif |
5749 | 840 |
%} |
841 |
! |
|
842 |
||
12841 | 843 |
tempAt:index |
8578 | 844 |
"return the n'th stack-temporary variable" |
845 |
||
846 |
^ self at:index |
|
847 |
! |
|
848 |
||
12841 | 849 |
temporaries |
202 | 850 |
"return an array filled with the temporaries of this context" |
851 |
||
308 | 852 |
|nonTemps mySize| |
202 | 853 |
|
18437 | 854 |
nonTemps := self argumentCount + self numVars. |
1810 | 855 |
mySize := self numTemps. |
3130 | 856 |
mySize == 0 ifTrue:[ |
18437 | 857 |
"/ little optimization here - avaoid creating empty containers |
858 |
^ #() |
|
3130 | 859 |
]. |
308 | 860 |
^ (Array new:mySize) replaceFrom:1 to:mySize with:self startingAt:nonTemps+1 |
1810 | 861 |
|
862 |
"Modified: 23.10.1996 / 16:20:00 / cg" |
|
202 | 863 |
! |
864 |
||
10 | 865 |
varAt:n |
866 |
"return the n'th local variable" |
|
867 |
||
18437 | 868 |
^ self at:(n + self argumentCount) |
10 | 869 |
! |
870 |
||
871 |
varAt:n put:value |
|
872 |
"set the n'th local variable - useful when the receiver should be restarted |
|
54 | 873 |
or continued" |
10 | 874 |
|
18437 | 875 |
self at:(n + self argumentCount) put:value |
10 | 876 |
! |
877 |
||
12841 | 878 |
vars |
623 | 879 |
"return an array filled with the local variables of this context" |
375 | 880 |
|
623 | 881 |
|nonVars mySize| |
360 | 882 |
|
18437 | 883 |
nonVars := self argumentCount. |
1810 | 884 |
mySize := self numVars. |
3130 | 885 |
mySize == 0 ifTrue:[ |
18437 | 886 |
"/ little optimization here - avaoid creating empty containers |
887 |
^ #() |
|
3130 | 888 |
]. |
623 | 889 |
^ (Array new:mySize) replaceFrom:1 to:mySize with:self startingAt:nonVars+1 |
1810 | 890 |
|
891 |
"Modified: 23.10.1996 / 16:20:06 / cg" |
|
1 | 892 |
! ! |
893 |
||
623 | 894 |
!Context methodsFor:'copying'! |
415 | 895 |
|
10943 | 896 |
deepCopyUsing:aDictionary postCopySelector:postCopySelector |
10136 | 897 |
|copyOfMe| |
3350
40dc4807a6d4
must catch #deppCopyUsing: instead of #deepCopy.
Claus Gittinger <cg@exept.de>
parents:
3324
diff
changeset
|
898 |
|
10136 | 899 |
copyOfMe := self shallowCopy. |
900 |
copyOfMe setSender:nil. |
|
13516
9bbdb9d05a51
changed: #deepCopyUsing:postCopySelector:
Claus Gittinger <cg@exept.de>
parents:
13473
diff
changeset
|
901 |
copyOfMe perform:postCopySelector withOptionalArgument:self and:aDictionary. |
10136 | 902 |
^ copyOfMe |
903 |
||
904 |
"Created: / 31-03-1998 / 15:51:14 / cg" |
|
13516
9bbdb9d05a51
changed: #deepCopyUsing:postCopySelector:
Claus Gittinger <cg@exept.de>
parents:
13473
diff
changeset
|
905 |
"Modified: / 21-07-2011 / 13:30:21 / cg" |
1 | 906 |
! ! |
907 |
||
15010 | 908 |
!Context methodsFor:'enumerating'! |
909 |
||
910 |
withAllSendersDo:aBlock |
|
911 |
"evaluate aBlock for me and all contexts of my sender chain" |
|
912 |
||
21146 | 913 |
self withSendersUpToContextForWhich:[:con | false] do:aBlock |
914 |
! |
|
915 |
||
916 |
withSendersThroughContextForWhich:checkBlock do:aBlock |
|
917 |
"evaluate aBlock for me and all contexts of my sender chain, |
|
918 |
until checkBlock returns true (incl. that last one)" |
|
919 |
||
15010 | 920 |
|con| |
921 |
||
922 |
con := self. |
|
923 |
[ con notNil ] whileTrue:[ |
|
21146 | 924 |
aBlock value:con. |
925 |
(checkBlock value:con) ifTrue:[^ self]. |
|
926 |
con := con sender. |
|
927 |
] |
|
928 |
! |
|
929 |
||
930 |
withSendersUpToContextForWhich:checkBlock do:aBlock |
|
931 |
"evaluate aBlock for me and all contexts of my sender chain, |
|
932 |
until checkBlock returns true, excl. that context." |
|
933 |
||
934 |
|con| |
|
935 |
||
936 |
con := self. |
|
937 |
[ con notNil ] whileTrue:[ |
|
938 |
(checkBlock value:con) ifTrue:[^ self]. |
|
939 |
aBlock value:con. |
|
940 |
con := con sender. |
|
15010 | 941 |
] |
942 |
! ! |
|
943 |
||
77 | 944 |
!Context methodsFor:'error handling'! |
945 |
||
946 |
invalidReturn:returnValue |
|
947 |
"this message is sent by the VM, when a methods context |
|
948 |
which has already returned is about to return again. |
|
949 |
(i.e. about to execute a return from an already returned |
|
105 | 950 |
method in a block). |
141 | 951 |
We raise a signal here, to allow catching of that situation." |
77 | 952 |
|
406 | 953 |
" |
954 |
in previous versions of ST/X and ST-80, this was no error; |
|
955 |
(instead, a normal blockreturn was performed to the value-sender). |
|
956 |
From a note in comp.lang.smalltalk, I conclude that new ST-80 versions |
|
957 |
now raise an error if this happens. |
|
958 |
Comment out the raise below to get that (old) behavior |
|
959 |
BETTER REWRITE YOUR APPLICATION |
|
12841 | 960 |
" |
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
961 |
"/ old behavior: |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
962 |
"/ ^ returnValue |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
963 |
|
282 | 964 |
"/ new behavior: |
965 |
||
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
966 |
"/ 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
|
967 |
"/ use another error message. |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
968 |
|
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
969 |
(home notNil and:[home sender notNil]) ifTrue:[ |
15933 | 970 |
^ CannotReturnError |
971 |
raiseRequestWith:returnValue |
|
972 |
errorString:'cannot return from another process''s context'. |
|
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
973 |
]. |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
974 |
|
12841 | 975 |
^ CannotReturnError |
15933 | 976 |
raiseRequestWith:returnValue. |
282 | 977 |
|
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
978 |
"Modified: / 2.2.1998 / 15:19:52 / cg" |
406 | 979 |
! |
980 |
||
981 |
invalidReturnOrRestart:returnValue |
|
15268 | 982 |
"this message is sent by the VM, when a method's or block's context |
983 |
which was compiled non-returnable is about to return again, |
|
984 |
or a non-restartable context is tried to be restarted. |
|
985 |
In ST/X, not all contexts are restartable/returnable. |
|
406 | 986 |
We raise a signal here, to allow catching of that situation." |
987 |
||
6002 | 988 |
^ CannotReturnError |
15933 | 989 |
raiseRequestWith:returnValue |
990 |
errorString:'method was compiled non-resumable' |
|
360 | 991 |
! |
992 |
||
993 |
invalidReturnOrRestartError:how with:value |
|
994 |
"common error reporter for restart/return errors" |
|
12841 | 995 |
|
360 | 996 |
self canReturn ifTrue:[ |
15933 | 997 |
" |
998 |
tried to return from/restart a context which is already dead |
|
999 |
(i.e. the method/block has already executed a return) |
|
1000 |
" |
|
1001 |
^ CannotReturnError |
|
1002 |
raiseRequestWith:value |
|
1003 |
errorString:(how , ' context not on calling chain') |
|
360 | 1004 |
]. |
1005 |
" |
|
1006 |
tried to return from/restart a context of a method which was compiled |
|
1007 |
unrestartable or of a block (which is never restartable) |
|
1008 |
" |
|
12841 | 1009 |
^ CannotReturnError |
15933 | 1010 |
raiseRequestWith:value |
1011 |
errorString:(how , ' context cannot be restarted/returned from') |
|
77 | 1012 |
! ! |
1013 |
||
6404 | 1014 |
!Context methodsFor:'fixups'! |
1015 |
||
1016 |
fixAllLineNumbers |
|
1017 |
%{ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
1018 |
#ifdef __SCHTEAM__ |
18190 | 1019 |
ERROR("unimplemented"); |
1020 |
#else |
|
6404 | 1021 |
__PATCHUPCONTEXTS(__thisContext); |
6424 | 1022 |
__CONTEXTLINENOS(self); |
18190 | 1023 |
#endif |
6404 | 1024 |
%} |
1025 |
! ! |
|
1026 |
||
623 | 1027 |
!Context methodsFor:'minidebugger printing'! |
1028 |
||
1029 |
fullPrint |
|
12841 | 1030 |
"print the receiver, selector and args of the context |
20840 | 1031 |
- used only for MiniDebugger's walkback print" |
1032 |
||
1033 |
self receiverPrintString _errorPrint. ' ' _errorPrint. selector _errorPrint. |
|
18437 | 1034 |
self argumentCount ~~ 0 ifTrue: [ |
20840 | 1035 |
' ' _errorPrint. self argsDisplayString _errorPrint |
623 | 1036 |
]. |
20840 | 1037 |
' [' _errorPrint. self lineNumber _errorPrint. ']' _errorPrintCR |
623 | 1038 |
|
1039 |
" |
|
1040 |
thisContext fullPrint |
|
1041 |
" |
|
1426 | 1042 |
|
1043 |
"Modified: 20.5.1996 / 10:27:14 / cg" |
|
623 | 1044 |
! |
1045 |
||
1046 |
fullPrintAll |
|
1047 |
"print a full walkback starting at the receiver |
|
20840 | 1048 |
- used only for MiniDebugger's walkback print" |
623 | 1049 |
|
15010 | 1050 |
self withAllSendersDo:[:con | con fullPrint]. |
623 | 1051 |
|
1052 |
" |
|
1053 |
thisContext fullPrintAll |
|
1054 |
" |
|
2173 | 1055 |
! |
1056 |
||
4674 | 1057 |
fullPrintAllLevels:nOrNil |
1058 |
"print a full walkback starting at the receiver, only print n levels |
|
20840 | 1059 |
- used only for MiniDebugger's walkback print" |
4674 | 1060 |
|
1061 |
|context count| |
|
1062 |
||
1063 |
count := 0. |
|
1064 |
context := self. |
|
1065 |
[context notNil] whileTrue: [ |
|
20840 | 1066 |
context fullPrint. |
1067 |
context := context sender. |
|
1068 |
nOrNil notNil ifTrue:[ |
|
1069 |
(count := count+1) > nOrNil ifTrue:[^self]. |
|
1070 |
] |
|
4674 | 1071 |
] |
1072 |
||
1073 |
" |
|
6648 | 1074 |
thisContext fullPrintAllLevels:5 |
4674 | 1075 |
" |
1076 |
||
1077 |
"Created: / 3.9.1999 / 14:02:38 / ps" |
|
11540 | 1078 |
! |
1079 |
||
11542 | 1080 |
printAll |
1081 |
"print a full walkback starting at the receiver, only print n levels |
|
20840 | 1082 |
- used only for MiniDebugger's walkback print" |
11542 | 1083 |
|
1084 |
self printAllLevels:nil |
|
1085 |
||
1086 |
" |
|
1087 |
thisContext printAll |
|
1088 |
" |
|
1089 |
! |
|
1090 |
||
11540 | 1091 |
printAllLevels:nOrNil |
1092 |
"print a full walkback starting at the receiver, only print n levels |
|
20840 | 1093 |
- used only for MiniDebugger's walkback print" |
11540 | 1094 |
|
1095 |
|context count| |
|
1096 |
||
1097 |
count := 0. |
|
1098 |
context := self. |
|
16247 | 1099 |
'--------------------------' errorPrintCR. |
11540 | 1100 |
[context notNil] whileTrue: [ |
20840 | 1101 |
context errorPrintCR. |
1102 |
context := context sender. |
|
1103 |
nOrNil notNil ifTrue:[ |
|
1104 |
(count := count+1) > nOrNil ifTrue:[ |
|
1105 |
'--------------------------' errorPrintCR. |
|
1106 |
^ self |
|
1107 |
]. |
|
1108 |
] |
|
11545 | 1109 |
]. |
16247 | 1110 |
'--------------------------' errorPrintCR. |
11540 | 1111 |
|
1112 |
" |
|
1113 |
thisContext printAllLevels:5 |
|
1114 |
" |
|
623 | 1115 |
! ! |
1116 |
||
1 | 1117 |
!Context methodsFor:'non local control flow'! |
1118 |
||
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1119 |
evaluateUnwindActionsUpTo:aContext |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1120 |
"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
|
1121 |
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
|
1122 |
marked using #markForUnwind. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1123 |
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
|
1124 |
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
|
1125 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1126 |
|con unwindBlock| |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1127 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1128 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1129 |
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
|
1130 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1131 |
con := self findNextUnwindContextOr:aContext. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1132 |
[con notNil and:[con ~~ aContext]] whileTrue:[ |
15933 | 1133 |
unwindBlock := con receiver unwindHandlerInContext:con. |
1134 |
con unmarkForUnwind. |
|
1135 |
unwindBlock value. |
|
1136 |
||
1137 |
con := con findNextUnwindContextOr:aContext. |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1138 |
]. |
11340
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1139 |
"/ 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
|
1140 |
(con notNil and:[con isMarkedForUnwind]) ifTrue:[ |
15933 | 1141 |
unwindBlock := con receiver unwindHandlerInContext:con. |
1142 |
con unmarkForUnwind. |
|
1143 |
unwindBlock value. |
|
11340
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1144 |
]. |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1145 |
^ con |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1146 |
! |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1147 |
|
15688 | 1148 |
resend |
1149 |
"EXPERIMENTAL: resend the context's message (to the same receiver). |
|
1150 |
if the method's implementation has been changed in the meanwhile (for example, in the debugger), |
|
1151 |
the new code is executed. Otherwise the same code is reexecuted from the start." |
|
1152 |
||
1153 |
self returnDoing:[ receiver perform:selector withArguments:(self args) ]. |
|
1154 |
||
1155 |
" |
|
1156 |
when we arrive here, something went wrong. |
|
1157 |
debugging ... |
|
1158 |
" |
|
1159 |
^ self invalidReturnOrRestartError:#'resend' with:nil |
|
1160 |
! |
|
1161 |
||
1 | 1162 |
restart |
1163 |
"restart the receiver - i.e. the method is evaluated again. |
|
402 | 1164 |
if the context to restart already died, trigger an error. |
141 | 1165 |
This is a low level helper for unwindAndRestart. |
1166 |
||
12841 | 1167 |
NOTICE: |
15933 | 1168 |
NO unwind actions are performed - this is usually not |
1169 |
what you want (see Context>>unwindAndRestart). |
|
12841 | 1170 |
|
1171 |
LIMITATION: |
|
15933 | 1172 |
currently a context can only be restarted by |
1173 |
the owning process - not from outside. |
|
1174 |
Also, the compiler has an option (+optcontext) to create |
|
1175 |
non-restartable contexts (which are faster). |
|
1176 |
If such a context is restarted, a runtime error is raised." |
|
1 | 1177 |
|
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1178 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
1179 |
#ifdef __SCHTEAM__ |
18364 | 1180 |
return __c__.RESTART(self); |
1181 |
/* NOTREACHED */ |
|
18190 | 1182 |
#else |
15650 | 1183 |
if (__INST(sender_) == nil) { |
15933 | 1184 |
RETURN(nil); |
15650 | 1185 |
} else { |
15933 | 1186 |
__RESUMECONTEXT__(self, RESTART_VALUE, 0); |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1187 |
} |
18190 | 1188 |
#endif |
360 | 1189 |
%}. |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1190 |
|
69 | 1191 |
" |
360 | 1192 |
when we arrive here, something went wrong. |
69 | 1193 |
debugging ... |
1194 |
" |
|
360 | 1195 |
^ self invalidReturnOrRestartError:#restart with:nil |
1 | 1196 |
! |
1197 |
||
623 | 1198 |
resume |
1199 |
"resume execution in this context. I.e. as if the method called |
|
1200 |
last by the receiver did a ^ nil. |
|
1201 |
If the context has already returned, report an error. |
|
1202 |
||
1203 |
NOTICE: |
|
15933 | 1204 |
NO unwind actions are performed (see Context>>unwind). |
12841 | 1205 |
|
1206 |
LIMITATION: |
|
15933 | 1207 |
currently a context can only be resumed by |
1208 |
the owning process - not from outside. |
|
1209 |
Also, the compiler has an option (+optcontext) to create |
|
1210 |
non-resumable contexts (which are faster). |
|
1211 |
If such a context is restarted, a runtime error is raised." |
|
623 | 1212 |
|
1213 |
^ self resume:nil |
|
1214 |
! |
|
1215 |
||
1216 |
resume:value |
|
1217 |
"resume the receiver - as if it got 'value' from whatever |
|
19448 | 1218 |
it called. This continues execution in the receiver's method |
623 | 1219 |
after the point where it did its last send. |
12841 | 1220 |
If the context has already returned - report an error. |
623 | 1221 |
|
1222 |
NOTICE: |
|
19448 | 1223 |
NO unwind actions are performed (see Context>>unwind:). |
623 | 1224 |
|
12841 | 1225 |
LIMITATION: |
19448 | 1226 |
currently a context can only be resumed by |
1227 |
the owning process - not from outside. |
|
1228 |
Also, the compiler has an option (+optcontext) to create |
|
1229 |
non-resumable contexts (which are faster). |
|
1230 |
If such a context is restarted, a runtime error is raised." |
|
623 | 1231 |
|
1668
41db5950f9ea
oops - con local variables are now renamed (last change in stc)
Claus Gittinger <cg@exept.de>
parents:
1492
diff
changeset
|
1232 |
|theContext| |
623 | 1233 |
|
1234 |
" |
|
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
1235 |
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
|
1236 |
(i.e. the one that I have called) and return from it. |
623 | 1237 |
" |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1238 |
|
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
1239 |
%{ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
1240 |
#ifdef __SCHTEAM__ |
18408 | 1241 |
return __c__._RETURN_TO(value, self.asSTContinuation()); |
1242 |
/* NOTREACHED */ |
|
18190 | 1243 |
#else |
4557 | 1244 |
OBJ sndr; |
1245 |
||
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
1246 |
theContext = __thisContext; |
4557 | 1247 |
while (theContext != nil) { |
19448 | 1248 |
sndr = __ContextInstPtr(theContext)->c_sender; |
1249 |
if (sndr == self) break; |
|
1250 |
theContext = sndr; |
|
623 | 1251 |
} |
3508 | 1252 |
if (theContext != nil) { |
19448 | 1253 |
if (__isLazy(theContext)) { |
1254 |
__PATCHUPCONTEXT(theContext); |
|
1255 |
} |
|
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1256 |
} |
18190 | 1257 |
#endif |
623 | 1258 |
%}. |
1259 |
||
1668
41db5950f9ea
oops - con local variables are now renamed (last change in stc)
Claus Gittinger <cg@exept.de>
parents:
1492
diff
changeset
|
1260 |
theContext isNil ifTrue:[ |
19448 | 1261 |
" |
1262 |
tried to resume in context which is already dead |
|
1263 |
(i.e. the method/block has already executed a return) |
|
1264 |
" |
|
1265 |
^ thisContext invalidReturnOrRestartError:#'resume:' with:value |
|
623 | 1266 |
]. |
1668
41db5950f9ea
oops - con local variables are now renamed (last change in stc)
Claus Gittinger <cg@exept.de>
parents:
1492
diff
changeset
|
1267 |
^ theContext return:value |
623 | 1268 |
! |
1269 |
||
4557 | 1270 |
resumeIgnoringErrors:value |
1271 |
"resume the receiver - as if it got 'value' from whatever |
|
19448 | 1272 |
it called. This continues execution in the receiver's method |
4557 | 1273 |
after the point where it did its last send. |
12841 | 1274 |
If the context has already returned - simply return. |
4557 | 1275 |
|
1276 |
NOTICE: |
|
19448 | 1277 |
NO unwind actions are performed (see Context>>unwind:). |
4557 | 1278 |
|
12841 | 1279 |
LIMITATION: |
19448 | 1280 |
currently a context can only be resumed by |
1281 |
the owning process - not from outside. |
|
1282 |
Also, the compiler has an option (+optcontext) to create |
|
1283 |
non-resumable contexts (which are faster). |
|
1284 |
If such a context is restarted, a runtime error is raised." |
|
4557 | 1285 |
|
1286 |
" |
|
1287 |
starting with this context, find the one below |
|
1288 |
(i.e. the one that I have called) and return from it. |
|
1289 |
" |
|
1290 |
||
1291 |
%{ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
1292 |
#ifdef __SCHTEAM__ |
18408 | 1293 |
return __c__._RETURN_TO(value, self.asSTContinuation()); |
1294 |
/* NOTREACHED */ |
|
18190 | 1295 |
#else |
4557 | 1296 |
OBJ theContext, sndr; |
1297 |
||
1298 |
theContext = __thisContext; |
|
1299 |
while (theContext != nil) { |
|
19448 | 1300 |
sndr = __ContextInstPtr(theContext)->c_sender; |
1301 |
if (sndr == self) break; |
|
1302 |
theContext = sndr; |
|
4557 | 1303 |
} |
1304 |
if (theContext != nil) { |
|
19448 | 1305 |
if (__ContextInstPtr(theContext)->c_sender) { |
1306 |
if (!((INT)(__ContextInstPtr(theContext)->c_flags) & __MASKSMALLINT(__CANNOT_RETURN))) { |
|
1307 |
__RESUMECONTEXT__(theContext, value, 0); |
|
1308 |
} |
|
1309 |
} |
|
4557 | 1310 |
} |
18190 | 1311 |
#endif |
4557 | 1312 |
%}. |
1313 |
||
1314 |
"/ no error reporting |
|
1315 |
! |
|
1316 |
||
1317 |
resumeOnErrorProceed:value |
|
1318 |
"resume the receiver - as if it got 'value' from whatever |
|
19448 | 1319 |
it called. This continues execution in the receiver's method |
4557 | 1320 |
after the point where it did its last send. |
12841 | 1321 |
If the context has already returned - simply return. |
4557 | 1322 |
|
1323 |
NOTICE: |
|
19448 | 1324 |
NO unwind actions are performed (see Context>>unwind:). |
4557 | 1325 |
|
12841 | 1326 |
LIMITATION: |
19448 | 1327 |
currently a context can only be resumed by |
1328 |
the owning process - not from outside. |
|
1329 |
Also, the compiler has an option (+optcontext) to create |
|
1330 |
non-resumable contexts (which are faster). |
|
1331 |
If such a context is restarted, a runtime error is raised." |
|
4557 | 1332 |
|
1333 |
" |
|
1334 |
starting with this context, find the one below |
|
1335 |
(i.e. the one that I have called) and return from it. |
|
1336 |
" |
|
1337 |
||
1338 |
%{ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
1339 |
#ifdef __SCHTEAM__ |
18408 | 1340 |
return __c__._RETURN_TO(value, self.asSTContinuation()); |
1341 |
/* NOTREACHED */ |
|
18190 | 1342 |
#else |
4557 | 1343 |
OBJ theContext, sndr; |
1344 |
||
1345 |
theContext = __thisContext; |
|
1346 |
while (theContext != nil) { |
|
19448 | 1347 |
sndr = __ContextInstPtr(theContext)->c_sender; |
1348 |
if (sndr == self) break; |
|
1349 |
theContext = sndr; |
|
4557 | 1350 |
} |
1351 |
if (theContext != nil) { |
|
19448 | 1352 |
if (__ContextInstPtr(theContext)->c_sender) { |
1353 |
__RESUMECONTEXT__(theContext, value, 0); |
|
1354 |
} |
|
4557 | 1355 |
} |
18190 | 1356 |
#endif |
4557 | 1357 |
%}. |
1358 |
||
1359 |
"/ no error reporting |
|
1360 |
! |
|
1361 |
||
69 | 1362 |
return |
141 | 1363 |
"return from this context with nil. I.e. as if it did a ^ nil. |
1364 |
NOTICE: |
|
15933 | 1365 |
NO unwind actions are performed - this is usually not |
1366 |
what you want (See Context>>unwind). |
|
1367 |
This is a low level method - a helper for unwind. |
|
12841 | 1368 |
|
1369 |
LIMITATION: |
|
15933 | 1370 |
currently a context can only be returned by |
1371 |
the owning process - not from outside. |
|
1372 |
Also, the compiler has an option (+optcontext) to create |
|
1373 |
non-returnable contexts (which are faster). |
|
1374 |
If such a context is restarted, a runtime error is raised." |
|
141 | 1375 |
|
1376 |
^ self return:nil |
|
1 | 1377 |
! |
1378 |
||
69 | 1379 |
return:value |
1380 |
"return from this context as if it did a '^ value'. |
|
141 | 1381 |
NOTICE: |
15933 | 1382 |
NO unwind actions are performed - this is usually not |
1383 |
what you want (See Context>>unwind:). |
|
1384 |
This is a low level method - a helper for unwind. |
|
141 | 1385 |
|
12841 | 1386 |
LIMITATION: |
15933 | 1387 |
currently a context can only be returned by |
1388 |
the owning process - not from outside. |
|
1389 |
Also, the compiler has an option (+optcontext) to create |
|
1390 |
non-returnable contexts (which are faster). |
|
1391 |
If such a context is restarted, a runtime error is raised." |
|
1 | 1392 |
|
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1393 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
1394 |
#ifdef __SCHTEAM__ |
18408 | 1395 |
return __c__._RETURN_FROM(value, self.asSTContinuation()); |
1396 |
/* NOTREACHED */ |
|
18190 | 1397 |
#else |
15651 | 1398 |
if (__INST(sender_) == nil) { |
15933 | 1399 |
RETURN(nil); |
15651 | 1400 |
} else { |
15933 | 1401 |
__RESUMECONTEXT__(self, value, 0); |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1402 |
} |
18190 | 1403 |
#endif |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1404 |
%}. |
1 | 1405 |
|
69 | 1406 |
" |
360 | 1407 |
when we arrive here, something went wrong. |
69 | 1408 |
debugging ... |
1409 |
" |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1410 |
^ self invalidReturnOrRestartError:#'return' with:value |
1 | 1411 |
! |
1412 |
||
328 | 1413 |
returnDoing:aBlock |
1414 |
"return from this context as if it did a '^ aBlock value'. |
|
1415 |
The block is evaluated as if called by the receiver context; |
|
1416 |
NOT the true executing context. |
|
1417 |
NOTICE: |
|
15933 | 1418 |
NO unwind actions are performed - this is usually not |
1419 |
what you want (See Context>>unwindThenDo:). |
|
1420 |
This is a low level method - a helper for unwind. |
|
328 | 1421 |
|
1422 |
LIMITATION: |
|
15933 | 1423 |
currently a context can only be returned by |
1424 |
the owning process - not from outside. |
|
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." |
|
328 | 1428 |
|
12841 | 1429 |
%{ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
1430 |
#ifdef __SCHTEAM__ |
18190 | 1431 |
ERROR("unimplemented"); |
1432 |
#else |
|
15651 | 1433 |
if (__INST(sender_) == nil) { |
15933 | 1434 |
RETURN(nil); |
15651 | 1435 |
} else { |
15933 | 1436 |
__RESUMECONTEXT__(self, aBlock, 2); |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1437 |
} |
18190 | 1438 |
#endif |
360 | 1439 |
%}. |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1440 |
|
328 | 1441 |
" |
360 | 1442 |
when we arrive here, something went wrong. |
328 | 1443 |
debugging ... |
1444 |
" |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1445 |
^ self invalidReturnOrRestartError:#'returnDoing' with:aBlock |
328 | 1446 |
! |
1447 |
||
1 | 1448 |
unwind |
69 | 1449 |
"return nil from the receiver - i.e. simulate a '^ nil'. |
11337 | 1450 |
If the context has already returned, report an error. |
1 | 1451 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
69 | 1452 |
and Block>>valueOnUnwindDo: on the way. |
1 | 1453 |
|
12841 | 1454 |
LIMITATION: |
15933 | 1455 |
currently a context can only be unwound by |
1456 |
the owning process - not from outside. |
|
1457 |
i.e. it is not possible for one thread to unwind |
|
1458 |
another threads context - which does not make sense anyway. |
|
1459 |
However, you can force another thread to do this in its own process |
|
1460 |
context, by giving it an interrupt action - this does make sense. |
|
1461 |
||
1462 |
Also, the compiler has an option (+optcontext) to create |
|
1463 |
non-returnable contexts (which are faster). |
|
1464 |
If such a context is restarted, a runtime error is raised." |
|
141 | 1465 |
|
1466 |
^ self unwind:nil |
|
1 | 1467 |
! |
1468 |
||
1469 |
unwind:value |
|
69 | 1470 |
"return value from the receiver - i.e. simulate a '^ value'. |
360 | 1471 |
If the context has already returned , report an error. |
1 | 1472 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
69 | 1473 |
and Block>>valueOnUnwindDo: on the way. |
141 | 1474 |
|
12841 | 1475 |
LIMITATION: |
15933 | 1476 |
currently a context can only be unwound by |
1477 |
the owning process - not from outside. |
|
1478 |
i.e. it is not possible for one thread to unwind |
|
1479 |
another threads context - which does not make sense anyway. |
|
1480 |
However, you can force another thread to do this in its own process |
|
1481 |
context, by giving it an interrupt action - this does make sense. |
|
1482 |
||
1483 |
Also, the compiler has an option (+optcontext) to create |
|
1484 |
non-returnable contexts (which are faster). |
|
1485 |
If such a context is restarted, a runtime error is raised." |
|
1 | 1486 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1487 |
|con| |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1488 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1489 |
self senderIsNil ifFalse:[ |
15933 | 1490 |
con := thisContext evaluateUnwindActionsUpTo:self. |
141 | 1491 |
]. |
1 | 1492 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1493 |
"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
|
1494 |
(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
|
1495 |
should we check for this situation first and NOT evaluate |
141 | 1496 |
the unwind actions in this case ?) |
1497 |
" |
|
69 | 1498 |
con isNil ifTrue:[ |
15933 | 1499 |
" |
1500 |
tried to return to a context which is already dead |
|
1501 |
(i.e. the method/block has already executed a return) |
|
1502 |
" |
|
1503 |
^ self invalidReturnOrRestartError:#'unwind:' with:value |
|
69 | 1504 |
]. |
141 | 1505 |
" |
1506 |
now, that all unwind-actions are done, I can use the |
|
1507 |
low-level return ... |
|
1508 |
" |
|
1509 |
^ self return:value |
|
1510 |
! |
|
1511 |
||
1512 |
unwindAndRestart |
|
1513 |
"restart the receiver - i.e. the method is evaluated again. |
|
13804 | 1514 |
if the context to restart already did report an error. |
141 | 1515 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
1516 |
and Block>>valueOnUnwindDo: before restarting. |
|
1517 |
||
12841 | 1518 |
LIMITATION: |
15933 | 1519 |
a context can only be restarted by |
1520 |
the owning process - not from outside. |
|
1521 |
i.e. it is not possible for one thread to unwindAndRestart |
|
1522 |
another threads context - which does not make sense anyway. |
|
1523 |
However, you can force another thread to do this in its own process |
|
1524 |
context, by giving it an interrupt action - this does make sense. |
|
1525 |
||
1526 |
Also, the compiler has an option (+optcontext) to create |
|
1527 |
non-restartable contexts (which are faster). |
|
1528 |
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
|
1529 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1530 |
|con| |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1531 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1532 |
self senderIsNil ifFalse:[ |
15933 | 1533 |
con := thisContext evaluateUnwindActionsUpTo:self. |
141 | 1534 |
]. |
1535 |
||
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1536 |
"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
|
1537 |
(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
|
1538 |
should we check for this situation first and NOT evaluate |
141 | 1539 |
the unwind actions in this case ?) |
1540 |
" |
|
1541 |
con isNil ifTrue:[ |
|
15933 | 1542 |
" |
1543 |
tried to return to a context which is already dead |
|
1544 |
(i.e. the method/block has already executed a return) |
|
1545 |
" |
|
1546 |
^ self invalidReturnOrRestartError:#'unwindAndRestart:' with:nil |
|
141 | 1547 |
]. |
1548 |
" |
|
1549 |
now, that all unwind-actions are done, I can use the |
|
1550 |
low-level restart ... |
|
1551 |
" |
|
1552 |
^ self restart |
|
328 | 1553 |
! |
1554 |
||
4485 | 1555 |
unwindAndResume:value |
1556 |
"resume execution in the the receiver - i.e. simulate a '^ value' |
|
1557 |
from whatever it called last. |
|
1558 |
If the context has already returned , report an error. |
|
1559 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
|
1560 |
and Block>>valueOnUnwindDo: on the way. |
|
1561 |
||
12841 | 1562 |
LIMITATION: |
15933 | 1563 |
currently a context can only be unwound by |
1564 |
the owning process - not from outside. |
|
1565 |
i.e. it is not possible for one thread to unwind |
|
1566 |
another threads context - which does not make sense anyway. |
|
1567 |
However, you can force another thread to do this in its own process |
|
1568 |
context, by giving it an interrupt action - this does make sense. |
|
1569 |
||
1570 |
Also, the compiler has an option (+optcontext) to create |
|
1571 |
non-returnable contexts (which are faster). |
|
1572 |
If such a context is restarted, a runtime error is raised." |
|
4485 | 1573 |
|
1574 |
|con| |
|
1575 |
||
1576 |
self senderIsNil ifFalse:[ |
|
15933 | 1577 |
con := thisContext evaluateUnwindActionsUpTo:self. |
4485 | 1578 |
]. |
1579 |
||
1580 |
"oops, if nil, I am not on the calling chain; |
|
1581 |
(bad bad, unwind action have already been performed. |
|
1582 |
should we check for this situation first and NOT evaluate |
|
1583 |
the unwind actions in this case ?) |
|
1584 |
" |
|
1585 |
con isNil ifTrue:[ |
|
15933 | 1586 |
" |
1587 |
tried to return to a context which is already dead |
|
1588 |
(i.e. the method/block has already executed a return) |
|
1589 |
" |
|
1590 |
^ self invalidReturnOrRestartError:#'unwindAndResume:' with:value |
|
4485 | 1591 |
]. |
1592 |
" |
|
1593 |
now, that all unwind-actions are done, I can use the |
|
1594 |
low-level resume ... |
|
1595 |
" |
|
1596 |
^ self resume:value |
|
1597 |
! |
|
1598 |
||
12841 | 1599 |
unwindThenDo:aBlock |
328 | 1600 |
"return the value of aBlock from the receiver - i.e. simulate a '^ aBlock value'. |
13804 | 1601 |
If the context has already returned, report an error. |
328 | 1602 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
1603 |
and Block>>valueOnUnwindDo: on the way. |
|
1604 |
The block is evaluated AFTER all unwind actions are performed |
|
15688 | 1605 |
(i.e. the block's sender will be the receiving context, not the |
402 | 1606 |
currently executing context) |
328 | 1607 |
|
12841 | 1608 |
LIMITATION: |
15933 | 1609 |
currently a context can only be unwound by |
1610 |
the owning process - not from outside |
|
1611 |
i.e. it is not possible for one thread to unwindThenDo |
|
1612 |
another threads context - which does not make sense anyway. |
|
1613 |
However, you can force another thread to do this in its own process |
|
1614 |
context, by giving it an interrupt action - this does make sense. |
|
1615 |
||
1616 |
Also, the compiler has an option (+optcontext) to create |
|
1617 |
non-returnable contexts (which are faster). |
|
1618 |
If such a context is restarted, a runtime error is raised." |
|
328 | 1619 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1620 |
|con| |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1621 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1622 |
self senderIsNil ifFalse:[ |
15933 | 1623 |
con := thisContext evaluateUnwindActionsUpTo:self. |
328 | 1624 |
]. |
1625 |
||
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1626 |
"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
|
1627 |
(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
|
1628 |
should we check for this situation first and NOT evaluate |
328 | 1629 |
the unwind actions in this case ?) |
1630 |
" |
|
1631 |
con isNil ifTrue:[ |
|
15933 | 1632 |
" |
1633 |
tried to return to a context which is already dead |
|
1634 |
(i.e. the method/block has already executed a return) |
|
1635 |
" |
|
1636 |
^ self invalidReturnOrRestartError:#'unwindThenDo:' with:aBlock |
|
328 | 1637 |
]. |
1638 |
" |
|
1639 |
now, that all unwind-actions are done, I can use the |
|
1640 |
low-level return ... |
|
1641 |
" |
|
12841 | 1642 |
^ self returnDoing:aBlock |
15688 | 1643 |
! |
1644 |
||
1645 |
unwindThenResend |
|
1646 |
"EXPERIMENTAL: resend the context's message (to the same receiver). |
|
1647 |
if the method's implementation has been changed in the meanwhile (for example, in the debugger), |
|
1648 |
the new code is executed. Otherwise the same code is reexecuted from the start. |
|
1649 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
|
1650 |
and Block>>valueOnUnwindDo: on the way. |
|
1651 |
The resend happens AFTER all unwind actions are performed |
|
1652 |
||
1653 |
LIMITATION: |
|
15933 | 1654 |
currently a context can only be unwound by |
1655 |
the owning process - not from outside |
|
1656 |
i.e. it is not possible for one thread to unwindThenDo |
|
1657 |
another threads context - which does not make sense anyway. |
|
1658 |
However, you can force another thread to do this in its own process |
|
1659 |
context, by giving it an interrupt action - this does make sense. |
|
1660 |
||
1661 |
Also, the compiler has an option (+optcontext) to create |
|
1662 |
non-returnable contexts (which are faster). |
|
1663 |
If such a context is restarted, a runtime error is raised." |
|
15688 | 1664 |
|
1665 |
|con| |
|
1666 |
||
1667 |
self senderIsNil ifFalse:[ |
|
15933 | 1668 |
con := thisContext evaluateUnwindActionsUpTo:self. |
15688 | 1669 |
]. |
1670 |
||
1671 |
"oops, if nil, I am not on the calling chain; |
|
1672 |
(bad bad, unwind action have already been performed. |
|
1673 |
should we check for this situation first and NOT evaluate |
|
1674 |
the unwind actions in this case ?) |
|
1675 |
" |
|
1676 |
con isNil ifTrue:[ |
|
15933 | 1677 |
" |
1678 |
tried to return to a context which is already dead |
|
1679 |
(i.e. the method/block has already executed a return) |
|
1680 |
" |
|
1681 |
^ self invalidReturnOrRestartError:#'unwindThenResend' with:nil |
|
15688 | 1682 |
]. |
1683 |
||
1684 |
"/ now, that all unwind-actions are done, I can use the low-level resend... |
|
1685 |
^ self resend |
|
1 | 1686 |
! ! |
623 | 1687 |
|
1688 |
!Context methodsFor:'printing & storing'! |
|
1689 |
||
1070
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1690 |
argStringFor:someObject |
15644 | 1691 |
|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
|
1692 |
%{ |
18297
e0881b40ff42
safeReceiverName fix (was confusing and had wrong name)
Claus Gittinger <cg@exept.de>
parents:
18291
diff
changeset
|
1693 |
#ifndef __SCHTEAM__ |
1070
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1694 |
/* |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1695 |
* 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
|
1696 |
* 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
|
1697 |
* which may lead to sends to free objects. In normal operation, this 'cannot' happen. |
14051 | 1698 |
* However, these print methods are also invoked for low-level pointer errors, so better be prepared... |
12841 | 1699 |
*/ |
1070
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1700 |
if (__isNonNilObject(someObject) && (__qClass(someObject)==nil)) { |
15933 | 1701 |
s = __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
|
1702 |
} |
18297
e0881b40ff42
safeReceiverName fix (was confusing and had wrong name)
Claus Gittinger <cg@exept.de>
parents:
18291
diff
changeset
|
1703 |
#endif /* not SCHTEAM */ |
1070
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1704 |
%}. |
11539 | 1705 |
s isNil ifTrue:[ |
15933 | 1706 |
s := someObject displayString. |
1707 |
s isNil ifTrue:[ |
|
1708 |
^ '**************** nil displayString of ',(someObject class name ? '??') |
|
1709 |
]. |
|
11539 | 1710 |
]. |
15933 | 1711 |
"/ JV@2013-04-26: Following is rubbish, the callers must handle string output correctly. |
15644 | 1712 |
"/ moreover storeString does not work on self-referencing structures, but that doesn't matter |
1713 |
"/ for wide strings. |
|
1714 |
"/ SV@2013-08-19: I checked/fixed the callers to use CharacterWriteStreams. |
|
1715 |
"/ s isWideString ifTrue:[ |
|
1716 |
"/ "make sure that the object really returns something we can stream into a string" |
|
1717 |
"/ s := someObject storeString. |
|
1718 |
"/ ]. |
|
11539 | 1719 |
^ 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
|
1720 |
! |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1721 |
|
623 | 1722 |
argsDisplayString |
14051 | 1723 |
^ String streamContents:[:s | self displayArgsOn:s ]. |
1724 |
||
1725 |
"Modified (format): / 07-03-2012 / 13:11:17 / cg" |
|
623 | 1726 |
! |
1727 |
||
6648 | 1728 |
displayArgsOn:aStream |
21645 | 1729 |
self displayArgsOn:aStream withCRs:false indent:0 |
1730 |
||
1731 |
"Modified: / 15-03-2017 / 14:13:38 / cg" |
|
1732 |
! |
|
1733 |
||
1734 |
displayArgsOn:aStream withCRs:withCRs indent:i |
|
15933 | 1735 |
| n "{ Class: SmallInteger }" |
15388 | 1736 |
s | |
6648 | 1737 |
|
18437 | 1738 |
n := self argumentCount. |
6648 | 1739 |
1 to:n do:[:index | |
18437 | 1740 |
Error handle:[:ex | |
1741 |
s := '*Error in argString*'. |
|
1742 |
] do:[ |
|
1743 |
s := self argStringFor:(self at:index). |
|
1744 |
s := s contractTo:100. |
|
1745 |
]. |
|
1746 |
||
21645 | 1747 |
aStream spaces:i. |
18437 | 1748 |
aStream nextPutAll:s asString string. |
21645 | 1749 |
withCRs ifTrue:[ |
1750 |
aStream cr. |
|
1751 |
] ifFalse:[ |
|
1752 |
index ~~ n ifTrue:[ aStream space ]. |
|
1753 |
]. |
|
6648 | 1754 |
]. |
14051 | 1755 |
|
21645 | 1756 |
"Created: / 15-03-2017 / 14:13:33 / cg" |
1757 |
! |
|
1758 |
||
1759 |
displayLocalsOn:aStream withCRs:withCRs indent:i |
|
1760 |
| n "{ Class: SmallInteger }" |
|
1761 |
s | |
|
1762 |
||
1763 |
n := self argumentCount. |
|
1764 |
n+1 to:self size do:[:index | |
|
1765 |
Error handle:[:ex | |
|
1766 |
s := '*Error in localString*'. |
|
1767 |
] do:[ |
|
1768 |
s := self argStringFor:(self at:index). |
|
1769 |
s := s contractTo:100. |
|
1770 |
]. |
|
1771 |
aStream spaces:i. |
|
1772 |
aStream nextPutAll:s asString string. |
|
1773 |
withCRs ifTrue:[ |
|
1774 |
aStream cr |
|
1775 |
] ifFalse:[ |
|
1776 |
index ~~ n ifTrue:[ aStream space ]. |
|
1777 |
]. |
|
1778 |
]. |
|
1779 |
||
1780 |
"Created: / 15-03-2017 / 14:13:23 / cg" |
|
6648 | 1781 |
! |
1782 |
||
14293
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1783 |
displayOn:aGCOrStream |
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1784 |
"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
|
1785 |
|
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1786 |
"/ what a kludge - Dolphin and Squeak mean: printOn: a stream; |
21529 | 1787 |
"/ old ST80 means: draw-yourself on a GC. |
14293
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1788 |
(aGCOrStream isStream) ifFalse:[ |
21529 | 1789 |
^ super displayOn:aGCOrStream |
14293
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1790 |
]. |
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1791 |
|
15933 | 1792 |
aGCOrStream |
21529 | 1793 |
nextPutAll:self class name; |
1794 |
nextPut:$(. |
|
14293
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1795 |
self printOn:aGCOrStream. |
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1796 |
aGCOrStream nextPut:$). |
21529 | 1797 |
|
1798 |
"Modified (comment): / 22-02-2017 / 16:47:42 / cg" |
|
623 | 1799 |
! |
1800 |
||
6648 | 1801 |
fullPrintAllOn:aStream |
12789 | 1802 |
"print a full walkback (incl arguments) starting at the receiver" |
6648 | 1803 |
|
21645 | 1804 |
self fullPrintAllOn:aStream withVariables:false |
6648 | 1805 |
|
1806 |
" |
|
1807 |
thisContext fullPrintAllOn:Transcript |
|
1808 |
" |
|
1809 |
||
21645 | 1810 |
"Created: / 15-01-1997 / 18:09:05 / cg" |
1811 |
"Modified: / 15-03-2017 / 14:16:12 / cg" |
|
6648 | 1812 |
! |
1813 |
||
22201 | 1814 |
fullPrintAllOn:aStream levels:numLevels |
1815 |
"print a full walkback (incl arguments) starting at the receiver" |
|
1816 |
||
22202 | 1817 |
self fullPrintAllOn:aStream levels:numLevels indent:0 |
22201 | 1818 |
|
1819 |
" |
|
1820 |
thisContext fullPrintAllOn:Transcript levels:10 |
|
1821 |
" |
|
1822 |
||
1823 |
"Created: / 18-08-2017 / 15:12:17 / cg" |
|
22202 | 1824 |
"Modified: / 21-08-2017 / 19:14:58 / cg" |
1825 |
! |
|
1826 |
||
1827 |
fullPrintAllOn:aStream levels:numLevels indent:indent |
|
1828 |
"print a full walkback (incl arguments) starting at the receiver" |
|
1829 |
||
1830 |
|count| |
|
1831 |
||
1832 |
count := 0. |
|
1833 |
self |
|
1834 |
withSendersThroughContextForWhich:[:c | false] |
|
1835 |
do:[:con | |
|
1836 |
aStream spaces:indent. |
|
1837 |
con fullPrintOn:aStream. aStream cr. |
|
1838 |
count := count + 1. |
|
1839 |
count >= numLevels ifTrue:[^ self]. |
|
1840 |
]. |
|
1841 |
||
1842 |
" |
|
1843 |
thisContext fullPrintAllOn:Transcript levels:10 |
|
1844 |
" |
|
1845 |
||
1846 |
"Created: / 21-08-2017 / 19:14:46 / cg" |
|
22201 | 1847 |
! |
1848 |
||
18977 | 1849 |
fullPrintAllOn:aStream throughContextForWhich:aBlock |
1850 |
"print a full walkback (incl arguments) starting at the receiver" |
|
1851 |
||
21146 | 1852 |
self withSendersThroughContextForWhich:aBlock do:[:con | |
18977 | 1853 |
con fullPrintOn:aStream. aStream cr. |
1854 |
]. |
|
1855 |
||
1856 |
" |
|
1857 |
thisContext fullPrintAllOn:Transcript throughContextForWhich:[:con | con selector == #doIt]. |
|
1858 |
" |
|
1859 |
! |
|
1860 |
||
1861 |
fullPrintAllOn:aStream upToContextForWhich:aBlock |
|
1862 |
"print a full walkback (incl arguments) starting at the receiver" |
|
1863 |
||
21146 | 1864 |
self withSendersUpToContextForWhich:aBlock do:[:con | |
18977 | 1865 |
con fullPrintOn:aStream. aStream cr. |
1866 |
]. |
|
1867 |
||
1868 |
" |
|
1869 |
thisContext fullPrintAllOn:Transcript upToContextForWhich:[:con | con selector == #doIt]. |
|
1870 |
" |
|
1871 |
! |
|
1872 |
||
21645 | 1873 |
fullPrintAllOn:aStream withVariables:withVariables |
1874 |
"print a full walkback (incl arguments) starting at the receiver" |
|
1875 |
||
1876 |
self withAllSendersDo:[:con | con fullPrintOn:aStream withVariables:withVariables. aStream cr]. |
|
1877 |
||
1878 |
" |
|
1879 |
thisContext fullPrintAllOn:Transcript withVariables:true |
|
1880 |
" |
|
1881 |
||
1882 |
"Created: / 15-03-2017 / 14:14:41 / cg" |
|
1883 |
! |
|
1884 |
||
13612 | 1885 |
fullPrintAllString |
1886 |
"return a string containing the full walkback (incl. arguments)" |
|
1887 |
||
21146 | 1888 |
|s| |
1889 |
||
22506 | 1890 |
s := '' writeStream. |
21146 | 1891 |
self fullPrintAllOn:s. |
1892 |
^ s contents |
|
13612 | 1893 |
|
1894 |
" |
|
1895 |
thisContext fullPrintAllString |
|
1896 |
" |
|
1897 |
||
1898 |
"Created: / 21-08-2011 / 07:37:36 / cg" |
|
1899 |
! |
|
1900 |
||
6648 | 1901 |
fullPrintOn:aStream |
12789 | 1902 |
"append a verbose description (incl. arguments) of the receiver onto aStream" |
6648 | 1903 |
|
21645 | 1904 |
self fullPrintOn:aStream withVariables:false |
1905 |
||
1906 |
" |
|
1907 |
thisContext fullPrintOn:Transcript |
|
1908 |
thisContext sender fullPrintOn:Transcript |
|
1909 |
" |
|
1910 |
||
1911 |
"Created: / 15-01-1997 / 18:09:06 / cg" |
|
1912 |
"Modified (comment): / 15-03-2017 / 14:08:51 / cg" |
|
1913 |
! |
|
1914 |
||
1915 |
fullPrintOn:aStream withVariables:withVariables |
|
1916 |
"append a verbose description (incl. arguments) of the receiver onto aStream" |
|
1917 |
||
15383 | 1918 |
self printReceiverOn:aStream. |
12841 | 1919 |
aStream nextPutAll:' >> '. |
11311 | 1920 |
self selector printOn:aStream. "show as string (as symbol looks too ugly in browser ...)" |
1921 |
"/ self selector storeOn:aStream. "show as symbol" |
|
8578 | 1922 |
|
21645 | 1923 |
withVariables ifFalse:[ |
1924 |
self size ~~ 0 ifTrue: [ |
|
1925 |
aStream space. |
|
1926 |
self displayArgsOn:aStream |
|
1927 |
]. |
|
6648 | 1928 |
]. |
12841 | 1929 |
aStream nextPutAll:' {'. |
1930 |
self identityHash printOn:aStream. |
|
15383 | 1931 |
aStream nextPut:$}. |
12841 | 1932 |
|
1933 |
aStream nextPutAll:' ['. |
|
6648 | 1934 |
self lineNumber printOn:aStream. |
15383 | 1935 |
aStream nextPut:$]. |
6648 | 1936 |
|
21645 | 1937 |
withVariables ifTrue:[ |
1938 |
self size ~~ 0 ifTrue: [ |
|
1939 |
self argumentCount ~~ 0 ifTrue:[ |
|
1940 |
aStream cr; nextPutAll:' Args:'; cr. |
|
1941 |
self displayArgsOn:aStream withCRs:true indent:4. |
|
1942 |
]. |
|
1943 |
self size > self argumentCount ifTrue:[ |
|
1944 |
aStream cr; nextPutAll:' Locals:'; cr. |
|
1945 |
self displayLocalsOn:aStream withCRs:true indent:4. |
|
1946 |
]. |
|
1947 |
]. |
|
1948 |
]. |
|
1949 |
||
6648 | 1950 |
" |
21645 | 1951 |
thisContext fullPrintOn:Transcript withVariables:true |
1952 |
" |
|
1953 |
||
1954 |
"Created: / 15-03-2017 / 13:24:16 / cg" |
|
6648 | 1955 |
! |
1956 |
||
623 | 1957 |
fullPrintString |
1958 |
"return a string describing the context - this includes the linenumber, |
|
1959 |
receiver printString and argument printString" |
|
1960 |
||
15644 | 1961 |
^ String streamContents:[:s | self fullPrintOn:s] |
623 | 1962 |
|
1963 |
" |
|
1964 |
thisContext fullPrintString |
|
1965 |
" |
|
1966 |
! |
|
1967 |
||
1968 |
methodPrintString |
|
12841 | 1969 |
"return a string describing the contexts method as 'implementorClass>>selector'" |
623 | 1970 |
|
1853
09cd1e8df9a2
use new Method>>who interface
Claus Gittinger <cg@exept.de>
parents:
1810
diff
changeset
|
1971 |
|mthd who| |
623 | 1972 |
|
1973 |
mthd := self method. |
|
1974 |
mthd notNil ifTrue:[ |
|
15933 | 1975 |
who := mthd who. |
1976 |
who notNil ifTrue:[ |
|
1977 |
^ who methodClass name , ' >> #' , who methodSelector |
|
1978 |
] |
|
623 | 1979 |
]. |
1980 |
^ mthd displayString. |
|
1981 |
||
1982 |
" |
|
12841 | 1983 |
thisContext methodPrintString |
1984 |
thisContext sender methodPrintString |
|
623 | 1985 |
" |
1853
09cd1e8df9a2
use new Method>>who interface
Claus Gittinger <cg@exept.de>
parents:
1810
diff
changeset
|
1986 |
|
09cd1e8df9a2
use new Method>>who interface
Claus Gittinger <cg@exept.de>
parents:
1810
diff
changeset
|
1987 |
"Modified: 1.11.1996 / 16:21:49 / cg" |
623 | 1988 |
! |
1989 |
||
12789 | 1990 |
printAllOn:aStream |
1991 |
"print a brief walkback (excl. arguments) starting at the receiver" |
|
1992 |
||
15010 | 1993 |
self withAllSendersDo:[:con | con printOn:aStream. aStream cr]. |
12789 | 1994 |
|
1995 |
" |
|
1996 |
thisContext printAllOn:Transcript |
|
1997 |
" |
|
1998 |
||
1999 |
"Created: 15.1.1997 / 18:09:05 / cg" |
|
2000 |
! |
|
2001 |
||
21146 | 2002 |
printAllOn:aStream throughContextForWhich:aBlock |
2003 |
"print a short walkback (excl. arguments) starting at the receiver" |
|
2004 |
||
2005 |
self withSendersThroughContextForWhich:aBlock do:[:con | |
|
2006 |
con printOn:aStream. aStream cr. |
|
2007 |
]. |
|
2008 |
||
2009 |
" |
|
2010 |
thisContext printAllOn:Transcript throughContextForWhich:[:con | con selector == #doIt]. |
|
2011 |
" |
|
2012 |
! |
|
2013 |
||
2014 |
printAllOn:aStream upToContextForWhich:aBlock |
|
2015 |
"print a short walkback (excl. arguments) starting at the receiver" |
|
2016 |
||
2017 |
self withSendersUpToContextForWhich:aBlock do:[:con | |
|
2018 |
con printOn:aStream. aStream cr. |
|
2019 |
]. |
|
2020 |
||
2021 |
" |
|
2022 |
thisContext printAllOn:Transcript upToContextForWhich:[:con | con selector == #withCursor:do:]. |
|
2023 |
" |
|
2024 |
! |
|
2025 |
||
13612 | 2026 |
printAllString |
2027 |
"return a string containing the walkback (excl. arguments)" |
|
2028 |
||
2029 |
|s| |
|
2030 |
||
22506 | 2031 |
s := '' writeStream. |
13612 | 2032 |
self printAllOn:s. |
2033 |
^ s contents |
|
2034 |
||
2035 |
" |
|
2036 |
thisContext printAllString |
|
2037 |
" |
|
2038 |
||
2039 |
"Created: / 21-08-2011 / 07:38:05 / cg" |
|
2040 |
! |
|
2041 |
||
16223 | 2042 |
printClassNameOf:aClass on:aStream |
2043 |
"helper for printing" |
|
2044 |
||
16819
c96b396b7307
Oops, fix in Context >> printClassNameOf:on: for Java static methods
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
16818
diff
changeset
|
2045 |
| nonMeta | |
c96b396b7307
Oops, fix in Context >> printClassNameOf:on: for Java static methods
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
16818
diff
changeset
|
2046 |
|
21923 | 2047 |
nonMeta := aClass theNonMetaclass. |
2048 |
nonMeta isJavaClass ifTrue:[ |
|
2049 |
nonMeta javaName printOn: aStream |
|
16223 | 2050 |
] ifFalse:[ |
21923 | 2051 |
(aClass name ? '????') printOn:aStream. |
16223 | 2052 |
]. |
16818
2f2ff0820cef
Fixes in Context>>#printClassNameOf:on: / #printOn: for Java classes.
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
16797
diff
changeset
|
2053 |
|
16819
c96b396b7307
Oops, fix in Context >> printClassNameOf:on: for Java static methods
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
16818
diff
changeset
|
2054 |
"Modified: / 08-08-2014 / 09:39:24 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
16223 | 2055 |
! |
2056 |
||
623 | 2057 |
printOn:aStream |
12789 | 2058 |
"append a brief description (excl. arguments) of the receiver onto aStream" |
623 | 2059 |
|
22601 | 2060 |
self printWithSeparator:' >> ' on:aStream |
623 | 2061 |
! |
2062 |
||
15383 | 2063 |
printReceiverOn:aStream |
2064 |
"print description of the receiver of the context to aStream" |
|
2065 |
||
2066 |
|receiverClass receiverClassName implementorClass| |
|
2067 |
||
18297
e0881b40ff42
safeReceiverName fix (was confusing and had wrong name)
Claus Gittinger <cg@exept.de>
parents:
18291
diff
changeset
|
2068 |
receiverClassName := self safeReceiverClassNameIfInvalid. |
15383 | 2069 |
receiverClassName notNil ifTrue:[ |
18190 | 2070 |
"if we come here, this is a context with an illegal class" |
2071 |
receiverClassName printOn:aStream. |
|
2072 |
^ self. |
|
15383 | 2073 |
]. |
1070
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
2074 |
|
623 | 2075 |
receiverClass := receiver class. |
15383 | 2076 |
|
2077 |
(receiverClass == SmallInteger or:[receiverClass == Float]) ifTrue:[ |
|
18190 | 2078 |
aStream nextPut:$(. receiver printOn:aStream. aStream nextPutAll:') '. |
15383 | 2079 |
]. |
16223 | 2080 |
self printClassNameOf:receiverClass on:aStream. |
15383 | 2081 |
|
2082 |
(selector notNil or:[method notNil]) ifTrue:[ |
|
18190 | 2083 |
"/ implementorClass := self searchClass whichClassIncludesSelector:selector. |
2084 |
||
2085 |
" |
|
2086 |
kludge to avoid slow search for containing class |
|
2087 |
" |
|
2088 |
(method notNil |
|
2089 |
or:[selector ~~ #doIt and:[selector ~~ #doIt:]]) ifTrue:[ |
|
2090 |
implementorClass := self methodClass. |
|
2091 |
implementorClass isNil ifTrue:[ |
|
2092 |
" |
|
2093 |
kludge for the frame called by a wrappedmethod; |
|
2094 |
the wrappedmethod is in the class, so its mclass is correct. |
|
2095 |
however, the originalmethod is invoked via performMethod, and its mclass |
|
2096 |
is nil. Care for this here. Think about keeping the mclass in the original method. |
|
2097 |
" |
|
2098 |
(method notNil and:[method isWrapped not]) ifTrue:[ |
|
2099 |
WrappedMethod notNil ifTrue:[ |
|
2100 |
WrappedMethod allWrappedMethodsDo:[:wrapped | |
|
2101 |
wrapped originalMethodIfWrapped == method ifTrue:[ |
|
2102 |
implementorClass := wrapped mclass. |
|
2103 |
]. |
|
2104 |
]. |
|
2105 |
]. |
|
2106 |
] |
|
2107 |
]. |
|
2108 |
]. |
|
2109 |
||
2110 |
implementorClass notNil ifTrue: [ |
|
2111 |
(implementorClass ~~ receiverClass) ifTrue: [ |
|
2112 |
aStream nextPut:$(. |
|
2113 |
self printClassNameOf:implementorClass on:aStream. |
|
2114 |
aStream nextPut:$). |
|
2115 |
] |
|
2116 |
] ifFalse:[ |
|
2117 |
| srchClass where | |
|
2118 |
||
2119 |
srchClass := self searchClass. |
|
2120 |
srchClass ~~ receiverClass ifTrue:[ |
|
2121 |
aStream nextPut:$(. |
|
2122 |
self printClassNameOf:srchClass on:aStream. |
|
2123 |
aStream nextPut:$). |
|
2124 |
]. |
|
2125 |
" |
|
2126 |
kludge for doIt - these unbound methods are not |
|
2127 |
found in the classes methodDictionary |
|
2128 |
" |
|
2129 |
true "(selector ~~ #doIt and:[selector ~~ #doIt:])" ifTrue:[ |
|
2130 |
" |
|
2131 |
kludge for methods invoked explicitly via valueWithReceiver... |
|
2132 |
" |
|
2133 |
(self sender notNil |
|
2134 |
and:[ self sender receiver isMethod |
|
2135 |
and:[ self sender selector startsWith:'valueWithReceiver:' ]]) ifTrue:[ |
|
2136 |
where := '(**DIRECTED**)'. |
|
2137 |
] ifFalse:[ |
|
2138 |
where := '(**NONE**)'. |
|
2139 |
]. |
|
2140 |
aStream nextPutAll:where |
|
2141 |
] |
|
2142 |
] |
|
623 | 2143 |
]. |
2144 |
||
15961 | 2145 |
"Created: / 23-10-2013 / 11:13:19 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
2146 |
"Modified: / 05-02-2014 / 17:50:33 / cg" |
|
10549 | 2147 |
! |
2148 |
||
22601 | 2149 |
printWithSeparator:sep on:aStream |
2150 |
"append a brief description (excl. arguments) of the receiver onto aStream" |
|
2151 |
||
2152 |
| m | |
|
2153 |
||
2154 |
self printReceiverOn:aStream. |
|
23133 | 2155 |
|
2156 |
(self isBlockContext and:[self selector == #value]) ifFalse:[ |
|
2157 |
||
2158 |
"/ aStream nextPutAll:' '. |
|
2159 |
aStream nextPutAll:sep. |
|
2160 |
||
2161 |
aStream bold. |
|
2162 |
m := self method. |
|
2163 |
m isJavaMethod ifTrue:[ |
|
2164 |
aStream nextPutAll: (m printStringForBrowserWithSelector: self selector). |
|
2165 |
] ifFalse:[ |
|
2166 |
self selector printOn:aStream. "show as string (as symbol looks too ugly in browser ...)" |
|
2167 |
"/ self selector storeOn:aStream. "show as symbol" |
|
2168 |
]. |
|
2169 |
aStream normal. |
|
22601 | 2170 |
]. |
23133 | 2171 |
|
22601 | 2172 |
(method notNil and:[method isWrapped]) ifTrue:[ |
2173 |
aStream nextPutAll:' (wrapped) ' |
|
2174 |
]. |
|
2175 |
aStream nextPutAll:' ['. |
|
2176 |
m isJavaMethod ifTrue:[ |
|
2177 |
aStream nextPutAll: self method mclass sourceFile ? '???' . |
|
2178 |
m isNative ifTrue:[ |
|
2179 |
aStream nextPutAll: ':in native code' |
|
2180 |
] ifFalse:[ |
|
2181 |
aStream nextPut: $:. |
|
2182 |
(m lineNumberForPC0: lineNr) ? '???' printOn: aStream. |
|
2183 |
]. |
|
2184 |
] ifFalse:[ |
|
2185 |
self lineNumber printOn: aStream |
|
2186 |
]. |
|
2187 |
aStream nextPut:$]. |
|
2188 |
||
2189 |
"Modified: / 05-08-2012 / 12:00:00 / cg" |
|
2190 |
"Modified: / 08-08-2014 / 07:37:24 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
|
23133 | 2191 |
"Modified: / 26-06-2018 / 19:22:56 / Claus Gittinger" |
22601 | 2192 |
! |
2193 |
||
15383 | 2194 |
receiverPrintString |
2195 |
"return a string describing the receiver of the context" |
|
2196 |
||
2197 |
|s| |
|
2198 |
||
22506 | 2199 |
s := '' writeStream. |
15383 | 2200 |
self printReceiverOn:s. |
2201 |
^ s contents |
|
2202 |
||
2203 |
" |
|
22506 | 2204 |
thisContext receiverPrintString |
15383 | 2205 |
" |
2206 |
! |
|
2207 |
||
18297
e0881b40ff42
safeReceiverName fix (was confusing and had wrong name)
Claus Gittinger <cg@exept.de>
parents:
18291
diff
changeset
|
2208 |
safeReceiverClassNameIfInvalid |
e0881b40ff42
safeReceiverName fix (was confusing and had wrong name)
Claus Gittinger <cg@exept.de>
parents:
18291
diff
changeset
|
2209 |
"if the receiver refers to an invalid object, |
e0881b40ff42
safeReceiverName fix (was confusing and had wrong name)
Claus Gittinger <cg@exept.de>
parents:
18291
diff
changeset
|
2210 |
return a replacement string. otherwise nil. |
10549 | 2211 |
This cares for invalid (free) objects which may appear with bad primitive code, |
2212 |
and prevents a crash in such a case." |
|
2213 |
||
2214 |
%{ |
|
18412 | 2215 |
#ifdef __SCHTEAM__ |
2216 |
return __c__._RETURN( ((STContinuation)self).stSelf(__c__) ); |
|
2217 |
#else |
|
10549 | 2218 |
/* |
2219 |
* special handling for (invalid) free objects. |
|
2220 |
* these only appear if some primitiveCode does not correctly use SEND macros, |
|
2221 |
* which may lead to sends to free objects. In normal operation, this 'cannot' happen. |
|
12841 | 2222 |
*/ |
10549 | 2223 |
if (__isNonNilObject(__INST(receiver)) && (__qClass(__INST(receiver))==nil)) { |
18297
e0881b40ff42
safeReceiverName fix (was confusing and had wrong name)
Claus Gittinger <cg@exept.de>
parents:
18291
diff
changeset
|
2224 |
RETURN( __MKSTRING("FreeObject") ); |
10549 | 2225 |
} |
18297
e0881b40ff42
safeReceiverName fix (was confusing and had wrong name)
Claus Gittinger <cg@exept.de>
parents:
18291
diff
changeset
|
2226 |
#endif /* not SCHTEAM */ |
10549 | 2227 |
%}. |
18297
e0881b40ff42
safeReceiverName fix (was confusing and had wrong name)
Claus Gittinger <cg@exept.de>
parents:
18291
diff
changeset
|
2228 |
^ nil |
10549 | 2229 |
|
2230 |
"Created: / 21-05-2007 / 13:19:37 / cg" |
|
623 | 2231 |
! ! |
2232 |
||
7257 | 2233 |
!Context methodsFor:'private-accessing'! |
623 | 2234 |
|
11340
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
2235 |
isMarkedForUnwind |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
2236 |
"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
|
2237 |
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
|
2238 |
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
|
2239 |
|
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
2240 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2241 |
#ifdef __SCHTEAM__ |
18412 | 2242 |
return context._RETURN ( ((STContinuation)self).isMarkedForUnwind() ); |
18190 | 2243 |
#else |
18253 | 2244 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__UNWIND_MARK)) ? true : false ); |
18190 | 2245 |
#endif |
11340
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
2246 |
%} |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
2247 |
" |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
2248 |
thisContext isMarkedForUnwind |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
2249 |
" |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
2250 |
! |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
2251 |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2252 |
markForHandle |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2253 |
"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
|
2254 |
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
|
2255 |
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
|
2256 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2257 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2258 |
#ifdef __SCHTEAM__ |
18412 | 2259 |
((STContinuation)self).markForHandle(); |
18190 | 2260 |
#else |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2261 |
__INST(flags) = (OBJ)((INT)__INST(flags) | __MASKSMALLINT(__HANDLE_MARK)); |
18190 | 2262 |
#endif |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2263 |
%} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2264 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2265 |
"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
|
2266 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2267 |
|
753
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
2268 |
markForInterrupt |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
2269 |
"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
|
2270 |
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
|
2271 |
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
|
2272 |
|
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
2273 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2274 |
#ifdef __SCHTEAM__ |
18412 | 2275 |
((STContinuation)self).markForInterrupt(); |
18190 | 2276 |
#else |
753
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
2277 |
__markInterrupted(__ContextInstPtr(self)); |
18190 | 2278 |
#endif |
753
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
2279 |
%} |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
2280 |
! |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
2281 |
|
1727 | 2282 |
markForInterruptOnUnwind |
2283 |
"set the interrupt-on-unwind flag in the receiver. |
|
2284 |
The VM will generate a stepInterrupt, when this context returns or |
|
2285 |
is unwound. This is used by the debugger for faster single-stepping; |
|
2286 |
- a highly internal mechanism and not for public use." |
|
2287 |
||
2288 |
%{ /* NOCONTEXT */ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2289 |
#ifdef __SCHTEAM__ |
18412 | 2290 |
((STContinuation)self).markForInterruptOnUnwind(); |
18190 | 2291 |
#else |
3508 | 2292 |
__INST(flags) = (OBJ)((INT)__INST(flags) | __MASKSMALLINT(__IRQ_ON_UNWIND)); |
18190 | 2293 |
#endif |
1727 | 2294 |
%} |
2295 |
! |
|
2296 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2297 |
markForRaise |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2298 |
"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
|
2299 |
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
|
2300 |
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
|
2301 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2302 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2303 |
#ifdef __SCHTEAM__ |
18412 | 2304 |
((STContinuation)self).markForRaise(); |
18190 | 2305 |
#else |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2306 |
__INST(flags) = (OBJ)((INT)__INST(flags) | __MASKSMALLINT(__RAISE_MARK)); |
18190 | 2307 |
#endif |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2308 |
%} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2309 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2310 |
"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
|
2311 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2312 |
|
623 | 2313 |
markForUnwind |
749 | 2314 |
"set the mark for unwind flag in the receiver. |
2315 |
The VM needs this to know that some special action is to be performed with |
|
2316 |
this context - a highly internal mechanism and not for public use." |
|
2317 |
||
623 | 2318 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2319 |
#ifdef __SCHTEAM__ |
18412 | 2320 |
((STContinuation)self).markForUnwind(); |
18190 | 2321 |
#else |
1133 | 2322 |
__INST(flags) = (OBJ)((INT)__INST(flags) | __MASKSMALLINT(__UNWIND_MARK)); |
18190 | 2323 |
#endif |
623 | 2324 |
%} |
749 | 2325 |
|
2326 |
"Modified: 13.12.1995 / 19:05:22 / cg" |
|
623 | 2327 |
! |
2328 |
||
5780 | 2329 |
setHome:aContext |
2330 |
"set the homeContext. |
|
2331 |
DANGER: this is for experimental, internal use only (byteCode interpreters)" |
|
2332 |
||
2333 |
home := aContext. |
|
2334 |
! |
|
2335 |
||
2336 |
setSender:aContext |
|
2337 |
"set the sender of the context. |
|
2338 |
DANGER: this is for experimental, internal use only (byteCode interpreters)" |
|
2339 |
||
2340 |
%{ /* NOCONTEXT */ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2341 |
#ifdef __SCHTEAM__ |
18412 | 2342 |
((STContinuation)self).caller = aContext.asSTContinuation(); |
18190 | 2343 |
#else |
5780 | 2344 |
__INST(sender_) = aContext; |
18190 | 2345 |
#endif |
5780 | 2346 |
%} |
2347 |
! |
|
2348 |
||
623 | 2349 |
unmarkForUnwind |
749 | 2350 |
"clear the mark for unwind flag in the receiver. |
2351 |
The VM needs this to know that some special action is to be performed with |
|
2352 |
this context - a highly internal mechanism and not for public use." |
|
2353 |
||
623 | 2354 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2355 |
#ifdef __SCHTEAM__ |
18412 | 2356 |
((STContinuation)self).unmarkForUnwind(); |
18190 | 2357 |
#else |
1133 | 2358 |
__INST(flags) = (OBJ)((INT)__INST(flags) & ~__MASKSMALLINT(__UNWIND_MARK)); |
18190 | 2359 |
#endif |
623 | 2360 |
%} |
2361 |
! ! |
|
2362 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2363 |
!Context methodsFor:'searching'! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2364 |
|
8284 | 2365 |
findExceptional |
12841 | 2366 |
"walk along the sender chain (starting with the sender), |
8284 | 2367 |
for a context which is marked as handle or raise context. |
2368 |
This non-standard interface is only to be used by exception" |
|
2369 |
||
2370 |
"/ this could have been (actually: was) implemented as: |
|
2371 |
"/ |
|
2372 |
"/ |con| |
|
2373 |
"/ |
|
2374 |
"/ con := self. |
|
2375 |
"/ [con notNil] whileTrue:[ |
|
2376 |
"/ [con isHandleContext] ifTrue:[^con]. |
|
2377 |
"/ [con isRaiseContext] ifTrue:[^con]. |
|
2378 |
"/ con := con sender. |
|
2379 |
"/ ]. |
|
2380 |
"/ ^ nil |
|
2381 |
"/ |
|
2382 |
"/ and the code below does exactly this (somewhat faster, though). |
|
2383 |
"/ |
|
2384 |
"/ (it avoids referencing all intermediate contexts, which would mark them special, |
|
2385 |
"/ although they aren't really - this is expert knowledge, no need to understand that ...) |
|
2386 |
||
2387 |
%{ /* NOCONTEXT */ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2388 |
#ifdef __SCHTEAM__ |
18253 | 2389 |
{ |
18412 | 2390 |
STContinuation lastCallee = (STContinuation)self; |
2391 |
STContinuation caller = lastCallee.caller; |
|
18406 | 2392 |
|
2393 |
while (caller != null) { |
|
18253 | 2394 |
if (caller.isExceptionalSmalltalkContext()) { |
18412 | 2395 |
caller = lastCallee.sender(); // exposed |
18253 | 2396 |
return context._RETURN(caller); |
2397 |
} |
|
18412 | 2398 |
lastCallee = caller; |
2399 |
caller = lastCallee.caller; |
|
18253 | 2400 |
} |
2401 |
return context._RETURN( STObject.Nil ); |
|
2402 |
} |
|
2403 |
/* NOTREACHED */ |
|
18190 | 2404 |
#else |
8284 | 2405 |
OBJ theContext; |
2406 |
||
2407 |
theContext = self; |
|
2408 |
while (__isNonNilObject(theContext)) { |
|
15933 | 2409 |
if ((INT)(__ContextInstPtr(theContext)->c_flags) & __MASKSMALLINT(__HANDLE_MARK|__RAISE_MARK)) { |
2410 |
if (__isLazy(theContext)) { |
|
2411 |
__PATCHUPCONTEXT(theContext); |
|
2412 |
} |
|
2413 |
||
2414 |
if (! __isNonLIFO(theContext)) { |
|
2415 |
/* |
|
2416 |
* to be prepared for the worst situation |
|
2417 |
* (the sender is not stored, so the trap won't catch it) |
|
2418 |
* make the writeBarrier trigger manually. |
|
2419 |
* We'll see, if this is really required. |
|
2420 |
*/ |
|
2421 |
theContext->o_space |= CATCHMARK; |
|
18190 | 2422 |
# if 0 |
15933 | 2423 |
__markNonLIFO(theContext); |
18190 | 2424 |
# endif |
15933 | 2425 |
} |
2426 |
RETURN (theContext); |
|
2427 |
} |
|
2428 |
theContext = __ContextInstPtr(theContext)->c_sender; |
|
8284 | 2429 |
} |
18253 | 2430 |
#endif /* not SCHTEAM */ |
8284 | 2431 |
%}. |
2432 |
^ nil |
|
2433 |
! |
|
2434 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2435 |
findNextContextWithSelector:selector1 or:selector2 or:selector3 |
12841 | 2436 |
"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
|
2437 |
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
|
2438 |
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
|
2439 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2440 |
"/ 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
|
2441 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2442 |
"/ |con| |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2443 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2444 |
"/ con := self sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2445 |
"/ [con notNil] whileTrue:[ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2446 |
"/ 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
|
2447 |
"/ con := con sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2448 |
"/ ]. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2449 |
"/ ^ nil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2450 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2451 |
"/ 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
|
2452 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2453 |
"/ (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
|
2454 |
"/ 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
|
2455 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2456 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2457 |
#ifdef __SCHTEAM__ |
18216 | 2458 |
{ |
18412 | 2459 |
STContinuation lastCallee = (STContinuation)self; |
2460 |
STContinuation cont = lastCallee.caller; |
|
2461 |
||
18216 | 2462 |
STObject sel1 = context.stArg(0); |
2463 |
STObject sel2 = context.stArg(1); |
|
2464 |
STObject sel3 = context.stArg(2); |
|
2465 |
||
18406 | 2466 |
while (cont != null) { |
2467 |
if (cont.isSmalltalkContext()) { |
|
2468 |
STObject thisSelector = cont.contextSelector(); |
|
18216 | 2469 |
|
2470 |
if ((thisSelector == sel1) |
|
2471 |
|| (thisSelector == sel2) |
|
2472 |
|| (thisSelector == sel3)) { |
|
2473 |
break; |
|
2474 |
} |
|
2475 |
} |
|
18412 | 2476 |
lastCallee = cont; |
2477 |
cont = lastCallee.caller; |
|
18216 | 2478 |
} |
18406 | 2479 |
if (cont == null) { |
2480 |
return __c__._RETURN_nil(); |
|
2481 |
} |
|
18412 | 2482 |
cont = lastCallee.sender(); // exposed |
18406 | 2483 |
return __c__._RETURN(cont); |
18216 | 2484 |
} |
2485 |
/* NOTREACHED */ |
|
18190 | 2486 |
#else |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2487 |
OBJ theContext; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2488 |
OBJ sel; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2489 |
OBJ __FETCHSELECTOR(); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2490 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2491 |
theContext = __INST(sender_); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2492 |
while (__isNonNilObject(theContext)) { |
15933 | 2493 |
if (__isLazy(theContext)) { |
18190 | 2494 |
# ifdef TRADITIONAL_STACK_FRAME |
15933 | 2495 |
sel = __FETCHSELECTOR(theContext); |
18190 | 2496 |
# else |
15933 | 2497 |
/* mhmh - not really needed */ |
2498 |
__PATCHUPCONTEXT(theContext); |
|
2499 |
sel = __ContextInstPtr(theContext)->c_selector; |
|
18190 | 2500 |
# endif |
15933 | 2501 |
} else { |
2502 |
sel = __ContextInstPtr(theContext)->c_selector; |
|
2503 |
} |
|
2504 |
||
2505 |
if ((sel == selector1) |
|
2506 |
|| ((selector2 != nil) && (sel == selector2)) |
|
2507 |
|| ((selector3 != nil) && (sel == selector3))) { |
|
2508 |
if (__isLazy(theContext)) { |
|
2509 |
__PATCHUPCONTEXT(theContext); |
|
2510 |
} |
|
2511 |
||
2512 |
if (! __isNonLIFO(theContext)) { |
|
2513 |
/* |
|
2514 |
* to be prepared for the worst situation |
|
2515 |
* (the sender is not stored, so the trap won't catch it) |
|
2516 |
* make the writeBarrier trigger manually. |
|
2517 |
* We'll see, if this is really required. |
|
2518 |
*/ |
|
2519 |
theContext->o_space |= CATCHMARK; |
|
2520 |
__markNonLIFO(theContext); |
|
2521 |
} |
|
2522 |
RETURN (theContext); |
|
2523 |
} |
|
2524 |
theContext = __ContextInstPtr(theContext)->c_sender; |
|
5422 | 2525 |
} |
2526 |
RETURN (nil); |
|
18190 | 2527 |
#endif |
5422 | 2528 |
%}. |
2529 |
" |
|
2530 |
|con sel| |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2531 |
|
5422 | 2532 |
con := self sender. |
2533 |
[con notNil] whileTrue:[ |
|
15933 | 2534 |
sel := con selector. |
2535 |
sel == selector1 ifTrue:[^ con]. |
|
2536 |
(selector2 notNil and:[sel == selector2]) ifTrue:[^ con]. |
|
2537 |
(selector3 notNil and:[sel == selector3]) ifTrue:[^ con]. |
|
2538 |
con := con sender. |
|
5422 | 2539 |
]. |
2540 |
^ nil |
|
2541 |
" |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2542 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2543 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2544 |
findNextUnwindContextOr:aContext |
12841 | 2545 |
"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
|
2546 |
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
|
2547 |
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
|
2548 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2549 |
"/ 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
|
2550 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2551 |
"/ |con| |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2552 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2553 |
"/ con := self sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2554 |
"/ [con notNil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2555 |
"/ and:[con ~~ aContext |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2556 |
"/ 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
|
2557 |
"/ ^ con |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2558 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2559 |
"/ 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
|
2560 |
"/ (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
|
2561 |
"/ 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
|
2562 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2563 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2564 |
#ifdef __SCHTEAM__ |
18408 | 2565 |
{ |
2566 |
if (self == aContext) { |
|
2567 |
return __c__._RETURN(self); |
|
2568 |
} |
|
2569 |
||
18412 | 2570 |
STContinuation lastCallee = (STContinuation)self; |
2571 |
STContinuation theContext = lastCallee.caller; |
|
18408 | 2572 |
|
2573 |
while (theContext != null) { |
|
2574 |
if ((theContext == aContext) |
|
2575 |
|| theContext.isMarkedForUnwind()) { |
|
18412 | 2576 |
theContext = lastCallee.sender(); // exposed |
18408 | 2577 |
return __c__._RETURN(theContext); |
2578 |
} |
|
18412 | 2579 |
lastCallee = theContext; |
2580 |
theContext = lastCallee.caller; |
|
18408 | 2581 |
} |
2582 |
} |
|
18190 | 2583 |
#else |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2584 |
OBJ theContext; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2585 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2586 |
if (self == aContext) { |
15933 | 2587 |
RETURN (self); |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2588 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2589 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2590 |
theContext = __INST(sender_); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2591 |
while (__isNonNilObject(theContext)) { |
15933 | 2592 |
if ((theContext == aContext) |
2593 |
|| ((INT)(__ContextInstPtr(theContext)->c_flags) & __MASKSMALLINT(__UNWIND_MARK))) { |
|
2594 |
if (__isLazy(theContext)) { |
|
2595 |
__PATCHUPCONTEXT(theContext); |
|
2596 |
} |
|
2597 |
if (! __isNonLIFO(theContext)) { |
|
2598 |
/* |
|
2599 |
* to be prepared for the worst situation |
|
2600 |
* (the sender is not stored, so the trap won't catch it) |
|
2601 |
* make the writeBarrier trigger manually. |
|
2602 |
* We'll see, if this is really required. |
|
2603 |
*/ |
|
2604 |
theContext->o_space |= CATCHMARK; |
|
18190 | 2605 |
# if 0 |
15933 | 2606 |
__markNonLIFO(theContext); |
18190 | 2607 |
# endif |
15933 | 2608 |
} |
2609 |
RETURN (theContext); |
|
2610 |
} |
|
2611 |
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
|
2612 |
} |
18190 | 2613 |
#endif |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2614 |
%}. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2615 |
^ nil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2616 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2617 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2618 |
findSpecialHandle:findHandleContext raise:findRaiseContext |
12841 | 2619 |
"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
|
2620 |
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
|
2621 |
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
|
2622 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2623 |
"/ 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
|
2624 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2625 |
"/ |con| |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2626 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2627 |
"/ con := self sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2628 |
"/ [con notNil] whileTrue:[ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2629 |
"/ (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
|
2630 |
"/ (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
|
2631 |
"/ con := con sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2632 |
"/ ]. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2633 |
"/ ^ nil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2634 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2635 |
"/ 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
|
2636 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2637 |
"/ (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
|
2638 |
"/ 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
|
2639 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2640 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2641 |
#ifdef __SCHTEAM__ |
18406 | 2642 |
{ |
18412 | 2643 |
STContinuation lastCallee = (STContinuation)self; |
2644 |
STContinuation theContext = lastCallee.caller; |
|
2645 |
||
18406 | 2646 |
while (theContext != null) { |
2647 |
if (theContext.isMarkedSpecial()) { |
|
2648 |
if ((findHandleContext == STObject.True) |
|
2649 |
&& theContext.isMarkedForHandle()) { |
|
18412 | 2650 |
theContext = lastCallee.sender(); // exposed |
18406 | 2651 |
return __c__._RETURN(theContext); |
2652 |
} |
|
2653 |
if ((findRaiseContext == STObject.True) |
|
2654 |
&& theContext.isMarkedForRaise()) { |
|
18412 | 2655 |
theContext = lastCallee.sender(); // exposed |
18406 | 2656 |
return __c__._RETURN(theContext); |
2657 |
} |
|
2658 |
} |
|
18412 | 2659 |
lastCallee = theContext; |
2660 |
theContext = lastCallee.caller; |
|
18406 | 2661 |
} |
2662 |
} |
|
18190 | 2663 |
#else |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2664 |
OBJ theContext; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2665 |
int flagMask = 0; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2666 |
INT mask; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2667 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2668 |
if (findHandleContext == true) |
15933 | 2669 |
flagMask = __HANDLE_MARK; |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2670 |
if (findRaiseContext == true) |
15933 | 2671 |
flagMask |= __RAISE_MARK; |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2672 |
|
12841 | 2673 |
mask = __MASKSMALLINT(flagMask); |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2674 |
theContext = __INST(sender_); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2675 |
while (__isNonNilObject(theContext)) { |
15933 | 2676 |
if ((INT)(__ContextInstPtr(theContext)->c_flags) & mask) { |
2677 |
if (__isLazy(theContext)) { |
|
2678 |
__PATCHUPCONTEXT(theContext); |
|
2679 |
} |
|
2680 |
||
2681 |
if (! __isNonLIFO(theContext)) { |
|
2682 |
/* |
|
2683 |
* to be prepared for the worst situation |
|
2684 |
* (the sender is not stored, so the trap won't catch it) |
|
2685 |
* make the writeBarrier trigger manually. |
|
2686 |
* We'll see, if this is really required. |
|
2687 |
*/ |
|
2688 |
theContext->o_space |= CATCHMARK; |
|
18190 | 2689 |
# if 0 |
15933 | 2690 |
__markNonLIFO(theContext); |
18190 | 2691 |
# endif |
15933 | 2692 |
} |
2693 |
RETURN (theContext); |
|
2694 |
} |
|
2695 |
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
|
2696 |
} |
18190 | 2697 |
#endif |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2698 |
%}. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2699 |
^ nil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2700 |
! ! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2701 |
|
1051 | 2702 |
!Context methodsFor:'special accessing'! |
2703 |
||
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2704 |
argAndVarNames |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2705 |
"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
|
2706 |
|
15644 | 2707 |
|homeContext homeMethod block numArgs numVars m src |
8217 | 2708 |
sel isDoIt blocksLineNr extractFromBlock sender| |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2709 |
|
18437 | 2710 |
numArgs := self argumentCount. |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2711 |
numVars := self numVars. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2712 |
(numArgs == 0 and:[numVars == 0]) ifTrue:[^ #()]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2713 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2714 |
homeContext := self methodHome. |
7652 | 2715 |
homeContext notNil ifTrue:[ |
18437 | 2716 |
sel := homeContext selector. |
2717 |
homeMethod := homeContext method. |
|
7652 | 2718 |
]. |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2719 |
|
12841 | 2720 |
extractFromBlock := |
18437 | 2721 |
[ |
21923 | 2722 |
|blockNode argNames varNames vars blocksHome| |
18437 | 2723 |
|
2724 |
blockNode := Compiler |
|
2725 |
blockAtLine:blocksLineNr |
|
2726 |
in:m |
|
2727 |
orSource:src |
|
2728 |
numArgs:numArgs |
|
2729 |
numVars:numVars. |
|
2730 |
||
2731 |
blockNode notNil ifTrue:[ |
|
2732 |
"/ a kludge |
|
2733 |
blockNode lineNumber == blocksLineNr ifTrue:[ |
|
2734 |
blocksHome := blockNode home. |
|
2735 |
(blocksHome notNil and:[blocksHome isBlock]) ifTrue:[ |
|
2736 |
(blocksHome numArgs == numArgs |
|
2737 |
and:[ blocksHome numVars == numVars ]) ifTrue:[ |
|
2738 |
blockNode := blocksHome |
|
2739 |
]. |
|
2740 |
]. |
|
2741 |
]. |
|
2742 |
||
2743 |
argNames := #(). |
|
2744 |
varNames := #(). |
|
2745 |
||
2746 |
numArgs > 0 ifTrue:[ |
|
2747 |
vars := blockNode arguments. |
|
2748 |
vars notEmptyOrNil ifTrue:[ |
|
2749 |
argNames := vars collect:[:var | var name] |
|
2750 |
] |
|
2751 |
]. |
|
2752 |
numVars > 0 ifTrue:[ |
|
2753 |
vars := blockNode variablesIncludingInlined: (homeMethod code notNil and:[homeMethod byteCode isNil]). |
|
2754 |
vars notEmptyOrNil ifTrue:[ |
|
2755 |
varNames := vars collect:[:var | var name]. |
|
2756 |
] |
|
2757 |
]. |
|
2758 |
^ argNames , varNames |
|
2759 |
]. |
|
2760 |
]. |
|
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2761 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2762 |
"/ #doIt needs special handling below |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2763 |
isDoIt := (sel == #'doIt') or:[sel == #'doIt:']. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2764 |
self isBlockContext ifFalse:[ |
18437 | 2765 |
isDoIt ifTrue:[ |
2766 |
homeMethod notNil ifTrue:[ |
|
2767 |
"/ special for #doIt |
|
2768 |
m := nil. |
|
2769 |
src := ('[' , homeMethod source , '\]') withCRs. |
|
2770 |
"/ blocksLineNr := self lineNumber. |
|
2771 |
blocksLineNr := (self home ? self) lineNumber. |
|
2772 |
extractFromBlock value. |
|
2773 |
] |
|
2774 |
]. |
|
2775 |
||
2776 |
homeMethod notNil ifTrue:[ |
|
2777 |
^ homeMethod methodArgAndVarNamesInContext: self. |
|
2778 |
]. |
|
2779 |
^ #() |
|
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2780 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2781 |
|
15644 | 2782 |
homeMethod notNil ifTrue:[ |
18437 | 2783 |
isDoIt ifTrue:[ |
2784 |
"/ special for #doIt |
|
2785 |
"/ my source is found in the method. |
|
2786 |
m := nil. |
|
2787 |
src := ('[' , homeMethod source , '\]') withCRs. |
|
2788 |
] ifFalse:[ |
|
2789 |
m := homeMethod. |
|
2790 |
src := nil. |
|
2791 |
]. |
|
2792 |
blocksLineNr := self lineNumber. |
|
2793 |
extractFromBlock value. |
|
2794 |
blocksLineNr := self home lineNumber. |
|
2795 |
extractFromBlock value. |
|
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2796 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2797 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2798 |
blocksLineNr isNil ifTrue:[ |
18437 | 2799 |
self isBlockContext ifTrue:[ |
2800 |
sender := self sender. |
|
2801 |
(sender notNil |
|
2802 |
and:[sender receiver isBlock |
|
2803 |
and:[sender selector startsWith:'value']]) |
|
2804 |
ifTrue:[ |
|
2805 |
block := sender receiver. |
|
2806 |
src := block source. |
|
2807 |
src isNil ifTrue:[ |
|
2808 |
self error:'no source'. |
|
2809 |
]. |
|
2810 |
blocksLineNr := 1. |
|
2811 |
extractFromBlock value. |
|
2812 |
]. |
|
2813 |
sender := nil. |
|
2814 |
]. |
|
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2815 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2816 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2817 |
^ #() |
15644 | 2818 |
|
2819 |
"Modified: / 19-08-2013 / 12:13:20 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
|
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2820 |
! |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2821 |
|
4557 | 2822 |
canResume |
2823 |
"return true, if the receiver allows to be resumed. |
|
18412 | 2824 |
In ST/X, due to the implementation, this requires that the context which |
2825 |
is right below the receiver is returnable and still active." |
|
4557 | 2826 |
|
2827 |
|theContext| |
|
2828 |
||
2829 |
" |
|
2830 |
starting with this context, find the one below |
|
2831 |
(i.e. the one that I have called) and return from it. |
|
2832 |
" |
|
2833 |
%{ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2834 |
#ifdef __SCHTEAM__ |
18412 | 2835 |
// in the SCHTEAM-engine, all contexts are resumable |
18289 | 2836 |
return context._RETURN_true(); |
18190 | 2837 |
#else |
4557 | 2838 |
OBJ sndr; |
2839 |
||
2840 |
theContext = __thisContext; |
|
2841 |
while (theContext != nil) { |
|
15933 | 2842 |
sndr = __ContextInstPtr(theContext)->c_sender; |
2843 |
if (sndr == self) break; |
|
2844 |
theContext = sndr; |
|
4557 | 2845 |
} |
2846 |
if (theContext != nil) { |
|
15933 | 2847 |
if (__isLazy(theContext)) { |
2848 |
__PATCHUPCONTEXT(theContext); |
|
2849 |
} |
|
4557 | 2850 |
} |
18190 | 2851 |
#endif |
4557 | 2852 |
%}. |
2853 |
theContext isNil ifTrue:[ |
|
15933 | 2854 |
^ false |
4557 | 2855 |
]. |
2856 |
^ theContext canReturn |
|
2857 |
! |
|
2858 |
||
1051 | 2859 |
canReturn |
2860 |
"return true, if the receiver allows returning through it. |
|
4557 | 2861 |
Blocks, (currently) always return false. |
2646 | 2862 |
Methods which contain a (non-inlined) block are always |
2863 |
returnable - for other methods, it depends on how the system |
|
2864 |
was compiled (stc flag +/-optContext). |
|
2865 |
If it was compiled with +optContext, methods are compiled |
|
4557 | 2866 |
non returnable, unless a return-pragma was present in the method. |
2646 | 2867 |
Since this saves some administrative work in every method |
2868 |
invocation and makes overall execution faster, the system classes |
|
18412 | 2869 |
are all compiled with this flag turned on. |
2870 |
This means, that by default, it is not possible to walk up the |
|
2871 |
calling chain and return to an arbitrary context. |
|
2872 |
For contexts which are known to require this (i.e. handlers as found |
|
2873 |
by the exception walkers, these are marked specially (markForReturn), |
|
2874 |
so compilers know that they should create full featured contexts." |
|
1051 | 2875 |
|
2876 |
%{ /* NOCONTEXT */ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2877 |
#ifdef __SCHTEAM__ |
18412 | 2878 |
// in the SCHTEAM-engine, all contexts can be returned from |
18289 | 2879 |
return context._RETURN_true(); |
18190 | 2880 |
#else |
3508 | 2881 |
RETURN ( ((INT)(__INST(flags)) & __MASKSMALLINT(__CANNOT_RETURN)) ? false : true ); |
18190 | 2882 |
#endif |
5441 | 2883 |
%}. |
2884 |
^ true |
|
1051 | 2885 |
! |
2886 |
||
1492 | 2887 |
hasStackToShow |
2646 | 2888 |
"private interface to the debugger. |
2889 |
Smalltalk contexts return false here - other language frames |
|
2890 |
(i.e. Java frames) may want to show the evaluation stack" |
|
2891 |
||
1492 | 2892 |
^ false |
2893 |
||
2894 |
"Created: 28.6.1996 / 14:48:39 / cg" |
|
2646 | 2895 |
"Modified: 13.5.1997 / 16:31:12 / cg" |
1492 | 2896 |
! |
2897 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2898 |
isHandleContext |
4505 | 2899 |
"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
|
2900 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2901 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2902 |
#ifdef __SCHTEAM__ |
18412 | 2903 |
return __c__._RETURN ( ((STContinuation)self).isMarkedForHandle() ); |
18190 | 2904 |
#else |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2905 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__HANDLE_MARK)) ? true : false ); |
18190 | 2906 |
#endif |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2907 |
%} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2908 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2909 |
|
1051 | 2910 |
isNonLifo |
2646 | 2911 |
"return true, if this is a nonLifo context. |
2912 |
A nonLifo context is one that is still on the machine stack, |
|
2913 |
but has a reference taken and needs to be converted to a real |
|
2914 |
object (in objectMemory) when the method/block returns. |
|
18412 | 2915 |
You don't have to understand this - this is a special ST/X |
2646 | 2916 |
debug query, which may be removed without notice." |
1051 | 2917 |
|
2918 |
%{ /* NOCONTEXT */ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2919 |
#ifdef __SCHTEAM__ |
18412 | 2920 |
return __c__._RETURN ( ((STContinuation)self).isNonLifo() ); |
18190 | 2921 |
#else |
1133 | 2922 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__NONLIFO)) ? true : false ); |
18190 | 2923 |
#endif |
1051 | 2924 |
%} |
2925 |
! |
|
2926 |
||
2927 |
isOnMachineStack |
|
12841 | 2928 |
"return true, if this is a machine stack context as opposed to a |
18412 | 2929 |
real heap context (i.e. if it has not been captured and returned from). |
2930 |
You don't have to understand this - this is a special ST/X |
|
2646 | 2931 |
debug query, which may be removed without notice." |
1051 | 2932 |
|
2933 |
%{ /* NOCONTEXT */ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2934 |
#ifdef __SCHTEAM__ |
18412 | 2935 |
return __c__._RETURN ( ! ((STContinuation)self).isCopiedToHeap() ); |
18190 | 2936 |
#else |
18412 | 2937 |
RETURN ( (__qSpace(self) >= STACKSPACE) ? true : false ); |
18190 | 2938 |
#endif |
1051 | 2939 |
%} |
2940 |
! |
|
2941 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2942 |
isRaiseContext |
4505 | 2943 |
"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
|
2944 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2945 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2946 |
#ifdef __SCHTEAM__ |
18412 | 2947 |
return __c__._RETURN ( ((STContinuation)self).isMarkedForRaise() ); |
18190 | 2948 |
#else |
18412 | 2949 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__RAISE_MARK)) ? true : false ); |
18190 | 2950 |
#endif |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2951 |
%} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2952 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2953 |
|
1051 | 2954 |
isSpecial |
2955 |
"return true, if this is either a nonLifo or interrupted context" |
|
2956 |
||
2957 |
%{ /* NOCONTEXT */ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2958 |
#ifdef __SCHTEAM__ |
18412 | 2959 |
return __c__._RETURN ( ((STContinuation)self).isMarkedSpecial() ); |
18190 | 2960 |
#else |
18412 | 2961 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__SPECIAL)) ? true : false ); |
18190 | 2962 |
#endif |
1051 | 2963 |
%} |
2964 |
! |
|
2965 |
||
2966 |
isUnwindContext |
|
2967 |
"return true, if this is an unwindContext" |
|
2968 |
||
2969 |
%{ /* NOCONTEXT */ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2970 |
#ifdef __SCHTEAM__ |
18412 | 2971 |
return __c__._RETURN ( ((STContinuation)self).isMarkedForUnwind() ); |
18190 | 2972 |
#else |
18412 | 2973 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__UNWIND_MARK)) ? true : false ); |
18190 | 2974 |
#endif |
1051 | 2975 |
%} |
8578 | 2976 |
! |
2977 |
||
2978 |
tempNames |
|
2979 |
"helper: given a context, return a collection of arg, var and temporary names" |
|
2980 |
||
2981 |
|names nTemps| |
|
2982 |
||
2983 |
names := self argAndVarNames. |
|
2984 |
(nTemps := self numTemps) > 0 ifTrue:[ |
|
15933 | 2985 |
^ names , ((1 to:nTemps) collect:[:idx | '_tmp' , idx printString]). |
8578 | 2986 |
]. |
2987 |
^ names. |
|
1051 | 2988 |
! ! |
2989 |
||
623 | 2990 |
!Context methodsFor:'testing'! |
2991 |
||
2992 |
isBlockContext |
|
2993 |
"return true, iff the receiver is a BlockContext, false otherwise" |
|
2994 |
||
2995 |
^ false |
|
2996 |
! |
|
2997 |
||
14214 | 2998 |
isCheapBlockContext |
2999 |
"return true, iff the receiver is a BlockContext, for a cheap block, false otherwise. |
|
3000 |
Cheap blocks do not refer to their home" |
|
3001 |
||
3002 |
^ false |
|
3003 |
||
3004 |
"Created: / 19-07-2012 / 11:22:38 / cg" |
|
3005 |
! |
|
3006 |
||
623 | 3007 |
isContext |
3008 |
"return true, iff the receiver is a Context, false otherwise" |
|
3009 |
||
3010 |
^ true |
|
3011 |
! |
|
3012 |
||
16078 | 3013 |
isReallyRecursive |
3014 |
"return true, if this context is one of a recursive send of the same |
|
3015 |
selector AND same argument(s) to the same receiver before. |
|
3016 |
Here, different arguments are NOT ignored" |
|
3017 |
||
3018 |
|c count "{Class: SmallInteger }" sameArgs| |
|
3019 |
||
3020 |
count := 0. |
|
3021 |
||
22262 | 3022 |
c := self. |
3023 |
[ |
|
3024 |
c := c findNextContextWithSelector:selector or:nil or:nil. |
|
3025 |
c notNil |
|
3026 |
] whileTrue:[ |
|
18437 | 3027 |
(c receiver == receiver) ifTrue:[ |
3028 |
c method == self method ifTrue:[ |
|
3029 |
sameArgs := true. |
|
3030 |
1 to:self argumentCount do:[:i | |
|
22262 | 3031 |
(c argAt:1) ~~ (self argAt:i) ifTrue:[ |
18437 | 3032 |
sameArgs := false |
3033 |
] |
|
3034 |
]. |
|
3035 |
sameArgs ifTrue:[^ true]. |
|
3036 |
] |
|
3037 |
]. |
|
3038 |
||
3039 |
" |
|
3040 |
this special test was added to get out after a while |
|
3041 |
if the sender chain is corrupt - this gives us at least |
|
3042 |
a chance to find those errors. |
|
3043 |
" |
|
3044 |
count := count + 1. |
|
22262 | 3045 |
count >= MaxRecursion ifTrue:[ |
3046 |
'Context [warning]: long context chain' errorPrintCR. |
|
18437 | 3047 |
^ true |
3048 |
] |
|
16078 | 3049 |
]. |
3050 |
^ false |
|
22262 | 3051 |
|
3052 |
"Modified: / 17-09-2017 / 10:00:34 / cg" |
|
16078 | 3053 |
! |
3054 |
||
623 | 3055 |
isRecursive |
3056 |
"return true, if this context is one of a recursive send of the same |
|
1483 | 3057 |
selector to the same receiver before. |
3058 |
Here, different arguments are ignored - i.e. only the same method |
|
3059 |
counts for recursiveness. |
|
623 | 3060 |
Used to detect recursive errors or recursive printing - for example." |
3061 |
||
16078 | 3062 |
|c count "{Class: SmallInteger }"| |
2291
af7652b82404
avoid touching contexts (making them nonLifo) when searching for unwind-contexts,
Claus Gittinger <cg@exept.de>
parents:
2285
diff
changeset
|
3063 |
|
af7652b82404
avoid touching contexts (making them nonLifo) when searching for unwind-contexts,
Claus Gittinger <cg@exept.de>
parents:
2285
diff
changeset
|
3064 |
count := 0. |
af7652b82404
avoid touching contexts (making them nonLifo) when searching for unwind-contexts,
Claus Gittinger <cg@exept.de>
parents:
2285
diff
changeset
|
3065 |
|
22262 | 3066 |
c := self. |
3067 |
[ |
|
3068 |
c := c findNextContextWithSelector:selector or:nil or:nil. |
|
3069 |
c notNil |
|
3070 |
] whileTrue:[ |
|
3071 |
(c receiver == receiver) ifTrue:[ |
|
3072 |
c method == self method ifTrue:[^ true]. |
|
3073 |
]. |
|
3074 |
||
3075 |
" |
|
3076 |
this special test was added to get out after a while |
|
3077 |
if the sender chain is corrupt - this gives us at least |
|
3078 |
a chance to find those errors. |
|
3079 |
" |
|
3080 |
count := count + 1. |
|
3081 |
count >= MaxRecursion ifTrue:[ |
|
3082 |
'Context [warning]: long context chain' errorPrintCR. |
|
3083 |
^ true |
|
3084 |
] |
|
623 | 3085 |
]. |
3086 |
^ false |
|
1483 | 3087 |
|
22262 | 3088 |
"Modified (format): / 17-09-2017 / 10:02:04 / cg" |
623 | 3089 |
! ! |
3090 |
||
1810 | 3091 |
!Context class methodsFor:'documentation'! |
749 | 3092 |
|
14418
6558e5c3b32e
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
14413
diff
changeset
|
3093 |
version |
18977 | 3094 |
^ '$Header$' |
14418
6558e5c3b32e
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
14413
diff
changeset
|
3095 |
! |
6558e5c3b32e
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
14413
diff
changeset
|
3096 |
|
13426 | 3097 |
version_CVS |
18977 | 3098 |
^ '$Header$' |
15644 | 3099 |
! |
3100 |
||
3101 |
version_HG |
|
3102 |
||
3103 |
^ '$Changeset: <not expanded> $' |
|
12573 | 3104 |
! |
3105 |
||
13426 | 3106 |
version_SVN |
15232 | 3107 |
^ '$ Id: Context.st 10643 2011-06-08 21:53:07Z vranyj1 $' |
749 | 3108 |
! ! |
7257 | 3109 |
|
14700 | 3110 |
|
623 | 3111 |
Context initialize! |