author | Stefan Vogel <sv@exept.de> |
Mon, 22 Jun 2015 11:24:02 +0200 | |
changeset 18494 | 41f8a86105f0 |
parent 18437 | c59fbf8e7b3a |
child 18442 | bd42fa983e3f |
child 18977 | 0088eb87454d |
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.
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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' |
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poolDictionaries:'' |
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category:'Kernel-Methods' |
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! |
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!Context class methodsFor:'documentation'! |
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copyright |
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" |
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COPYRIGHT (c) 1988 by Claus Gittinger |
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All Rights Reserved |
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This software is furnished under a license and may be used |
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only in accordance with the terms of that license and with the |
|
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inclusion of the above copyright notice. This software may not |
|
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be provided or otherwise made available to, or used by, any |
|
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other person. No t itle to or ownership of the software is |
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hereby transferred. |
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" |
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! |
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||
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documentation |
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" |
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Contexts represent the stack frame objects, which keep the processing |
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state of a method or block (i.e. its local variables, temporaries etc.) |
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Every message send adds a context to a chain, which can be traced back via |
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the sender field. The context of the currently active method is always |
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accessable via the pseuodoVariable called 'thisContext'. |
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The actual implementation uses the machines stack for this, building real |
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contexts on demand only, whenever a contexts 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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For both method- and block-contexts, the layout is the same. |
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For method contexts, the home-field is nil, while for block contexts the home- |
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field is either the context of its surrounding block (i.e. the context of the |
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block, in which the receiving block was created, if its a nested block) or of |
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its home method. |
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||
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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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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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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 accessable, since it may |
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be a lazy context (i.e. an empty frame). |
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The #sender method cares for this. |
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home <Context> the context, where this block was |
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created, or nil if its a method context |
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There are also cheap blocks, which do |
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not need a reference to the home context, |
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for those, its nil too. |
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receiver <Object> the receiver of this message |
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selector <Symbol> the selector of this message |
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searchClass <Class> the class, where the message lookup started |
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(for super sends) or nil, for regular sends. |
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lineNr <SmallInteger> the position where the context left off |
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(kind of p-counter). Only the low 16bits |
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are valid. |
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retValTemp nil temporary - always nil, when you see the context |
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(used in the VM as temporary) |
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handle *noObject* used by the VM; not accessable, not an object |
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method the corresponding method |
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<indexed> arguments of the send followed by |
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locals of the method/block followed by |
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temporaries. |
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[errors:] |
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CannotReturnError raised when a block tries |
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to return ('^') from a method context |
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which itself has already returned |
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(i.e. there is no place to return to) |
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WARNING: layout and size known by the compiler and runtime system - do not change. |
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[author:] |
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Claus Gittinger |
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[see also:] |
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Block Process Method |
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( contexts, stacks & unwinding : programming/contexts.html) |
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" |
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! ! |
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!Context class methodsFor:'initialization'! |
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initialize |
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CannotReturnError notifierString:'invalid return; method cannot return twice'. |
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CannotResumeError notifierString:'invalid resume'. |
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SingleStepInterruptRequest isNil ifTrue:[ |
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SingleStepInterruptRequest := QuerySignal new. |
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SingleStepInterruptRequest nameClass:self message:#singleStepInterruptRequest. |
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SingleStepInterruptRequest notifierString:'single step'. |
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] |
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"Modified: 6.5.1996 / 16:46:03 / cg" |
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! ! |
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!Context class methodsFor:'Signal constants'! |
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cannotResumeSignal |
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"return the signal used when a method is tried to be resumed, which cannot" |
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^ CannotResumeError |
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! |
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cannotReturnSignal |
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"return the signal used when a method is tried to be returned twice |
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or, when some dead context is unwound or restarted." |
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^ CannotReturnError |
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! |
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invalidReturnSignal |
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"return the signal used when a method is tried to be returned twice |
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or, when some dead context is unwound or restarted." |
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<resource: #obsolete> |
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self obsoleteMethodWarning:'use #cannotReturnSignal'. |
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^ self cannotReturnSignal. |
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! |
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singleStepInterruptRequest |
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"return the dummy query signal to ask for single stepping" |
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^ SingleStepInterruptRequest |
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"Created: 6.5.1996 / 16:46:32 / cg" |
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! ! |
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!Context class methodsFor:'error handling'! |
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showWhereWeCameFrom |
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"show the stack backtrace: at least 4 levels, or until the first |
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send to a non-collection object (because we want to know, |
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which non-collection send invoked a bad collection-method)." |
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|con count| |
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con := thisContext sender sender. |
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count := 0. |
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[ |
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(' from ' , con printString) errorPrintCR. |
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con := con sender. |
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count := count + 1. |
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] doWhile:[con notNil and:[count < 5 or:[con receiver isCollection]]]. |
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"/ one more |
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con notNil ifTrue:[ |
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(' from ' , con printString) errorPrintCR. |
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]. |
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" |
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#() asSet add:nil |
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" |
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! ! |
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||
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!Context class methodsFor:'queries'! |
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isBuiltInClass |
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"return true if this class is known by the run-time-system. |
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Here, true is returned." |
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^ true |
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"Modified: 23.4.1996 / 15:58:00 / cg" |
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! ! |
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!Context class methodsFor:'special searching'! |
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findFirstSpecialHandle:searchForHandle raise:searchForRaise |
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|c| |
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%{ |
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#ifdef __SCHTEAM__ |
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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__; |
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__c__ = __ContextInstPtr(__thisContext)->c_sender; |
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if (!__isNonNilObject(__c__)) { |
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RETURN(nil) |
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} |
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if (__isLazy(__c__)) { |
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__PATCHUPCONTEXT(__c__); |
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} |
270 |
c = __c__; |
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#endif |
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%}. |
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^ c findSpecialHandle:searchForHandle raise:searchForRaise |
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! ! |
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||
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!Context methodsFor:'Compatibility-Squeak'! |
277 |
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longStack |
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^ self fullPrintAllString |
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! ! |
281 |
||
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!Context methodsFor:'Compatibility-VW'! |
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resumeWith:value |
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"same as #resume: - visualWorks compatibility" |
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287 |
self resume:value |
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288 |
! ! |
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289 |
||
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!Context methodsFor:'accessing'! |
291 |
||
16489 | 292 |
arg1Index |
16544 | 293 |
"return the index of the 1st arg (redefined in JavaContext)" |
294 |
||
295 |
^ 1 |
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! |
297 |
||
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argAt:n |
299 |
"return the n'th argument" |
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||
18437 | 301 |
n > self argumentCount ifTrue:[ |
302 |
^ self subscriptBoundsError:n. |
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]. |
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^ self at:n |
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306 |
"Modified: 12.10.1996 / 21:44:28 / cg" |
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! |
308 |
||
309 |
argAt:n put:value |
|
310 |
"set the n'th argument - useful when the receiver should be restarted" |
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n > self argumentCount ifTrue:[ |
313 |
^ self subscriptBoundsError:n. |
|
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]. |
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self at:n put:value. |
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316 |
^ value |
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|
318 |
"Modified: 12.10.1996 / 21:44:32 / cg" |
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! |
320 |
||
321 |
args |
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322 |
"return an array filled with the arguments of this context" |
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323 |
||
324 |
|n| |
|
325 |
||
18437 | 326 |
n := self argumentCount. |
3130 | 327 |
n == 0 ifTrue:[ |
18437 | 328 |
"/ little optimization here - avaoid creating empty containers |
329 |
^ #() |
|
3130 | 330 |
]. |
623 | 331 |
^ (Array new:n) replaceFrom:1 to:n with:self. |
332 |
! |
|
154 | 333 |
|
623 | 334 |
argsAndVars |
335 |
"return an array filled with the arguments and variables of this context" |
|
336 |
||
337 |
|n| |
|
338 |
||
18437 | 339 |
n := self argumentCount + self numVars. |
3130 | 340 |
n == 0 ifTrue:[ |
18437 | 341 |
"/ little optimization here - avoid creating empty containers |
342 |
^ #() |
|
3130 | 343 |
]. |
623 | 344 |
^ (Array new:n) replaceFrom:1 to:n with:self. |
1810 | 345 |
|
346 |
"Modified: 23.10.1996 / 16:19:41 / cg" |
|
623 | 347 |
! |
154 | 348 |
|
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argumentCount |
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"ANSI alias for numArgs: return the number of arguments to the Block/Method" |
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|
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%{ /* NOCONTEXT */ |
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353 |
#ifdef __SCHTEAM__ |
18289 | 354 |
return context._RETURN( STInteger._new( self.asSTContinuation().numStArgs() ) ); |
18190 | 355 |
#else |
8913 | 356 |
RETURN ( __mkSmallInteger( (__intVal(__INST(flags)) >> __NARG_SHIFT) & __NARG_MASK) ); |
18190 | 357 |
#endif |
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%} |
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359 |
! |
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|
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at:n put:value |
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362 |
super at:n put:value. |
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|
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364 |
"/ need some aid for optimized code - |
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365 |
"/ some machines have the arguments/receiver etc. kept in register vars ... |
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366 |
"/ the unfix updates the machine-stack version of the receiver. |
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%{ |
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368 |
#ifndef __SCHTEAM__ |
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369 |
__UNFIXCONTEXT(self, 0); |
18190 | 370 |
#endif |
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371 |
%}. |
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372 |
^ value |
9e145a7ae670
need unfix, when changed via at:put:
Claus Gittinger <cg@exept.de>
parents:
7261
diff
changeset
|
373 |
! |
9e145a7ae670
need unfix, when changed via at:put:
Claus Gittinger <cg@exept.de>
parents:
7261
diff
changeset
|
374 |
|
623 | 375 |
home |
376 |
"return the immediate home of the receiver. |
|
377 |
for block contexts, this is the methodcontext, where the block was created, |
|
15688 | 378 |
for nested block contexts, it's the surrounding block's context. |
623 | 379 |
for method-contexts this is nil." |
25 | 380 |
|
623 | 381 |
^ nil "home" |
382 |
! |
|
1 | 383 |
|
3324
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
384 |
homeReceiver |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
385 |
"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
|
386 |
|
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
387 |
^ receiver |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
388 |
|
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
389 |
"Created: / 5.3.1998 / 16:18:26 / stefan" |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
390 |
! |
0295f7b3b208
Add #homeReceiver (as in ST80).
Stefan Vogel <sv@exept.de>
parents:
3258
diff
changeset
|
391 |
|
1 | 392 |
instVarAt:index |
69 | 393 |
"have to catch instVar access to retVal and handle - they are invalid. |
12841 | 394 |
Notice, that one of the next ST/X versions might get some syntactic |
69 | 395 |
extension to get this automatically)." |
1 | 396 |
|
18190 | 397 |
|what| |
398 |
||
399 |
%{ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
400 |
#ifdef __SCHTEAM__ |
18214
60e1764add21
oops - some bugs introduced by java support code
Claus Gittinger <cg@exept.de>
parents:
18190
diff
changeset
|
401 |
{ |
18406 | 402 |
int idx = index.intValue("[instVarAt:]"); |
18214
60e1764add21
oops - some bugs introduced by java support code
Claus Gittinger <cg@exept.de>
parents:
18190
diff
changeset
|
403 |
|
60e1764add21
oops - some bugs introduced by java support code
Claus Gittinger <cg@exept.de>
parents:
18190
diff
changeset
|
404 |
if (idx == I_sender) { |
18406 | 405 |
STContinuation c = self.sender(); |
406 |
if (c == null) { |
|
407 |
return __c__._RETURN_nil(); |
|
408 |
} |
|
409 |
return __c__._RETURN( c ); |
|
18214
60e1764add21
oops - some bugs introduced by java support code
Claus Gittinger <cg@exept.de>
parents:
18190
diff
changeset
|
410 |
} |
60e1764add21
oops - some bugs introduced by java support code
Claus Gittinger <cg@exept.de>
parents:
18190
diff
changeset
|
411 |
if (idx == I_retvalTemp) { |
18406 | 412 |
return __c__._RETURN( Nil ); |
18214
60e1764add21
oops - some bugs introduced by java support code
Claus Gittinger <cg@exept.de>
parents:
18190
diff
changeset
|
413 |
} |
60e1764add21
oops - some bugs introduced by java support code
Claus Gittinger <cg@exept.de>
parents:
18190
diff
changeset
|
414 |
if (idx == I_handle) { |
18406 | 415 |
return __c__._RETURN( Nil ); |
18214
60e1764add21
oops - some bugs introduced by java support code
Claus Gittinger <cg@exept.de>
parents:
18190
diff
changeset
|
416 |
} |
60e1764add21
oops - some bugs introduced by java support code
Claus Gittinger <cg@exept.de>
parents:
18190
diff
changeset
|
417 |
} |
18190 | 418 |
#else |
419 |
if (index == __MKSMALLINT(__SLOT_CONTEXT_SENDER)) { // sender - must be accessed specially |
|
420 |
what = @symbol(sender); |
|
421 |
} else if (index == __MKSMALLINT(__SLOT_CONTEXT_RETVAL)) { // retvalTemp - invisible |
|
422 |
RETURN (nil); |
|
423 |
} else if (index == __MKSMALLINT(__SLOT_CONTEXT_HANDLE)) { // handle to machine stack - invisible |
|
424 |
RETURN (nil); |
|
425 |
} |
|
426 |
#endif |
|
427 |
%}. |
|
18214
60e1764add21
oops - some bugs introduced by java support code
Claus Gittinger <cg@exept.de>
parents:
18190
diff
changeset
|
428 |
what == #sender ifTrue:[ |
60e1764add21
oops - some bugs introduced by java support code
Claus Gittinger <cg@exept.de>
parents:
18190
diff
changeset
|
429 |
^ self sender |
60e1764add21
oops - some bugs introduced by java support code
Claus Gittinger <cg@exept.de>
parents:
18190
diff
changeset
|
430 |
]. |
1 | 431 |
^ super instVarAt:index |
432 |
! |
|
433 |
||
434 |
instVarAt:index put:value |
|
69 | 435 |
"have to catch instVar access to retVal and handle - they are invalid. |
12841 | 436 |
Notice, that one of the next ST/X versions might get some syntactic |
69 | 437 |
extension to get this automatically)." |
1 | 438 |
|
18190 | 439 |
%{ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
440 |
#ifdef __SCHTEAM__ |
18190 | 441 |
ERROR("unimplemented"); |
442 |
#else |
|
443 |
if (index == __MKSMALLINT(__SLOT_CONTEXT_SENDER)) { // sender - not allowed to change |
|
444 |
RETURN (nil); |
|
445 |
} else if (index == __MKSMALLINT(__SLOT_CONTEXT_RETVAL)) { // retvalTemp - not allowed to change |
|
446 |
RETURN (nil); |
|
447 |
} else if (index == __MKSMALLINT(__SLOT_CONTEXT_HANDLE)) { // handle to machine stack - not allowed to change |
|
448 |
RETURN (nil); |
|
449 |
} |
|
450 |
#endif |
|
451 |
%}. |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
452 |
super instVarAt:index put:value. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
453 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
454 |
"/ need some aid for optimized code - |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
455 |
"/ 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
|
456 |
"/ 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
|
457 |
%{ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
458 |
#ifndef __SCHTEAM__ |
4570 | 459 |
__UNFIXCONTEXT(self, 0); |
18190 | 460 |
#endif |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
461 |
%}. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
462 |
^ value |
1 | 463 |
! |
464 |
||
4328
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
465 |
javaLineNumber |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
466 |
|nr pc| |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
467 |
|
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
468 |
lineNr notNil ifTrue:[ |
15933 | 469 |
pc := lineNr bitAnd:16rFFFF. |
4328
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
470 |
]. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
471 |
|
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
472 |
"/ 'ask line for pc:' print. pc printCR. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
473 |
pc isNil ifTrue:[ |
15933 | 474 |
nr := self lineNumberFromMethod. |
475 |
nr notNil ifTrue:[ |
|
476 |
^ nr |
|
477 |
]. |
|
478 |
" '-> 0 [a]' printCR. " |
|
479 |
^0 |
|
4328
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
480 |
]. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
481 |
|
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
482 |
nr := self method lineNumberForPC:pc. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
483 |
nr isNil ifTrue:[ |
15933 | 484 |
nr := self lineNumberFromMethod. |
485 |
nr notNil ifTrue:[ |
|
486 |
^ nr |
|
487 |
]. |
|
488 |
" '-> 0 [b]' printCR. " |
|
489 |
^ 0 |
|
4328
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
490 |
]. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
491 |
"/ '-> ' print. nr printCR. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
492 |
^ nr. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
493 |
|
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
494 |
! |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
495 |
|
623 | 496 |
lineNumber |
497 |
"this returns the lineNumber within the methods source, where the context was |
|
498 |
interrupted or called another method. (currently, sometimes this information |
|
499 |
is not available - in this case 0 is returned)" |
|
1 | 500 |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
501 |
|l| |
3923 | 502 |
|
4328
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
503 |
receiver isJavaObject ifTrue:[ |
15933 | 504 |
"/ chances are good that I am a javContext ... |
505 |
self method isJavaMethod ifTrue:[ |
|
506 |
^ self javaLineNumber |
|
507 |
] |
|
4328
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
508 |
]. |
9cc10bae2f98
care for contexts which really ought to be java contexts
Claus Gittinger <cg@exept.de>
parents:
3923
diff
changeset
|
509 |
|
3923 | 510 |
lineNr notNil ifTrue:[ |
15933 | 511 |
l := lineNr bitAnd:16rFFFF. |
3923 | 512 |
]. |
513 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
514 |
"/ self isJavaContext ifTrue:[ |nr m| |
3923 | 515 |
"/ m := self method. |
516 |
"/ l isNil ifTrue:[ |
|
517 |
"/ m notNil ifTrue:[ |
|
518 |
"/ nr := m lineNumber |
|
519 |
"/ ]. |
|
520 |
"/ nr notNil ifTrue:[ |
|
521 |
"/ ^ nr |
|
522 |
"/ ]. |
|
523 |
"/ ^0 |
|
524 |
"/ ]. |
|
525 |
"/ nr := self method lineNumberForPC:l. |
|
526 |
"/ nr isNil ifTrue:[ |
|
527 |
"/ m notNil ifTrue:[ |
|
528 |
"/ nr := m lineNumber |
|
529 |
"/ ]. |
|
530 |
"/ nr notNil ifTrue:[ |
|
531 |
"/ ^ nr |
|
532 |
"/ ]. |
|
533 |
"/ ^ 0 |
|
534 |
"/ ]. |
|
535 |
"/ ^ nr. |
|
536 |
"/ ]. |
|
537 |
||
538 |
^ l |
|
539 |
||
540 |
"Modified: / 10.11.1998 / 13:19:48 / cg" |
|
1 | 541 |
! |
542 |
||
4450 | 543 |
lineNumberFromMethod |
544 |
^ 1 |
|
545 |
! |
|
546 |
||
8488 | 547 |
message |
548 |
^ Message selector:selector arguments:self args |
|
549 |
||
550 |
" |
|
9355 | 551 |
thisContext methodHome message |
552 |
thisContext message |
|
8488 | 553 |
" |
554 |
! |
|
555 |
||
15851 | 556 |
messageSend |
557 |
^ MessageSend receiver:receiver selector:selector arguments:self args |
|
558 |
||
559 |
" |
|
560 |
thisContext methodHome messageSend |
|
561 |
thisContext messageSend |
|
562 |
" |
|
563 |
! |
|
564 |
||
1 | 565 |
method |
54 | 566 |
"return the method for which the receiver was created. |
13020 | 567 |
Change with ST/X vsn 6: |
15933 | 568 |
In older versions, the method was not stored in the context, but a lookup |
569 |
was simulated using selector and class. |
|
570 |
(which occasionally returned the wrong method - especially in the debugger, |
|
571 |
when the debugged method was changed). |
|
572 |
This has been changed - especially to support Jan's meta-object protocol. |
|
573 |
It is now stored in the context" |
|
1 | 574 |
|
3508 | 575 |
|c sender sendersSelector m| |
14225 | 576 |
|
577 |
(method notNil and:[method isMethod]) ifTrue:[ |
|
15933 | 578 |
^ method |
14225 | 579 |
]. |
580 |
||
581 |
"mhmh - maybe I am a context for an unbound method (as generated by doIt); |
|
582 |
look in the sender's context. Consider this a kludge. |
|
583 |
Future versions of ST/X's message lookup may store the method in |
|
584 |
the context. |
|
585 |
" |
|
586 |
sender := self sender. |
|
587 |
sender notNil ifTrue:[ |
|
15933 | 588 |
sendersSelector := sender selector. |
589 |
sendersSelector notNil ifTrue:[ |
|
590 |
(sendersSelector startsWith:'valueWithReceiver:') ifTrue:[ |
|
591 |
m := sender receiver. |
|
592 |
m isMethod ifTrue:[ |
|
593 |
method := m. |
|
594 |
^ m |
|
595 |
] |
|
596 |
] |
|
597 |
] |
|
12853
3d15dcbe0057
added method-in-context slot.
Claus Gittinger <cg@exept.de>
parents:
12841
diff
changeset
|
598 |
]. |
12841 | 599 |
|
325 | 600 |
c := self searchClass. |
601 |
" |
|
602 |
the below cannot happen in normal circumstances |
|
603 |
(added to avoid recursive errors in case of a broken sender chain) |
|
604 |
" |
|
605 |
c isBehavior ifFalse:[ |
|
15933 | 606 |
'Context [error]: non class in searchClass' errorPrintCR. |
607 |
' selector: ' errorPrint. selector errorPrint. |
|
608 |
' receiver: ' errorPrint. receiver errorPrintCR. |
|
609 |
^ nil |
|
325 | 610 |
]. |
611 |
||
328 | 612 |
c := c whichClassIncludesSelector:selector. |
1 | 613 |
c notNil ifTrue:[ |
15933 | 614 |
method := c compiledMethodAt:selector. |
615 |
^ method |
|
1 | 616 |
]. |
216 | 617 |
|
1 | 618 |
^ nil |
2135
6bd144c1c358
newStyle info & error messages
Claus Gittinger <cg@exept.de>
parents:
1853
diff
changeset
|
619 |
|
13426 | 620 |
"Modified: / 28-06-2011 / 20:23:05 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
14225 | 621 |
"Modified: / 20-07-2012 / 14:46:37 / cg" |
1 | 622 |
! |
623 |
||
212 | 624 |
methodClass |
625 |
"return the class in which the method for which the receiver was created is." |
|
626 |
||
1456 | 627 |
|cls m| |
628 |
||
12853
3d15dcbe0057
added method-in-context slot.
Claus Gittinger <cg@exept.de>
parents:
12841
diff
changeset
|
629 |
method notNil ifTrue:[ |
15933 | 630 |
method isMethod ifTrue:[ |
631 |
^ method mclass |
|
632 |
] |
|
12853
3d15dcbe0057
added method-in-context slot.
Claus Gittinger <cg@exept.de>
parents:
12841
diff
changeset
|
633 |
]. |
12841 | 634 |
|
1456 | 635 |
cls := self searchClass. |
3923 | 636 |
(cls isMeta |
637 |
and:[cls soleInstance isJavaClass]) ifTrue:[ |
|
15933 | 638 |
cls := cls soleInstance |
3923 | 639 |
]. |
1456 | 640 |
|
3923 | 641 |
[cls notNil] whileTrue:[ |
15933 | 642 |
cls := cls whichClassIncludesSelector:selector. |
643 |
cls isNil ifTrue:[^ nil]. |
|
644 |
||
645 |
m := cls compiledMethodAt:selector. |
|
646 |
m notNil ifTrue:[ |
|
647 |
m isIgnored ifFalse:[^ cls]. |
|
648 |
]. |
|
649 |
cls := cls superclass |
|
1456 | 650 |
]. |
651 |
^ cls |
|
652 |
||
3923 | 653 |
"Modified: / 5.11.1998 / 19:07:43 / cg" |
212 | 654 |
! |
655 |
||
623 | 656 |
methodHome |
657 |
"return the method-home - for method contexts this is the receiver" |
|
658 |
||
659 |
^ self |
|
660 |
! |
|
661 |
||
15091 | 662 |
methodSelector |
663 |
"return the method's (or home method's) selector" |
|
664 |
||
665 |
^ self methodHome selector |
|
666 |
! |
|
667 |
||
623 | 668 |
ntemp |
669 |
"return the number of temporary variables of the Block/Method. |
|
1810 | 670 |
(for debugging only). |
671 |
I dont like the name of this method; its here for compatibility." |
|
623 | 672 |
|
1810 | 673 |
^ self numTemps |
674 |
||
675 |
"Modified: 23.10.1996 / 16:19:06 / cg" |
|
623 | 676 |
! |
677 |
||
678 |
numArgs |
|
679 |
"return the number of arguments to the Block/Method" |
|
680 |
||
681 |
%{ /* NOCONTEXT */ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
682 |
#ifdef __SCHTEAM__ |
18289 | 683 |
return context._RETURN(STInteger._new(self.asSTContinuation().numStArgs())); |
18190 | 684 |
#else |
8913 | 685 |
RETURN ( __mkSmallInteger( (__intVal(__INST(flags)) >> __NARG_SHIFT) & __NARG_MASK) ); |
18190 | 686 |
#endif |
623 | 687 |
%} |
688 |
! |
|
689 |
||
1810 | 690 |
numTemps |
691 |
"return the number of temporary variables of the Block/Method. |
|
692 |
(for debugging only)" |
|
693 |
||
18437 | 694 |
^ self size - self argumentCount - self numVars |
1810 | 695 |
|
696 |
"Created: 23.10.1996 / 16:19:10 / cg" |
|
697 |
"Modified: 23.10.1996 / 16:19:48 / cg" |
|
698 |
! |
|
699 |
||
700 |
numVars |
|
623 | 701 |
"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
|
702 |
|
623 | 703 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
704 |
#ifdef __SCHTEAM__ |
18289 | 705 |
return context._RETURN(STInteger._new(self.asSTContinuation().numLocals(context))); |
18190 | 706 |
#else |
8913 | 707 |
RETURN ( __mkSmallInteger( (__intVal(__INST(flags)) >> __NVAR_SHIFT) & __NVAR_MASK) ); |
18190 | 708 |
#endif |
623 | 709 |
%} |
710 |
! |
|
711 |
||
1810 | 712 |
nvars |
713 |
"return the number of local variables of the Block/Method. |
|
714 |
I dont like the name of this method; its here for compatibility." |
|
715 |
||
716 |
^ self numVars |
|
717 |
||
718 |
"Modified: 23.10.1996 / 16:18:44 / cg" |
|
719 |
! |
|
720 |
||
13426 | 721 |
programmingLanguage |
722 |
||
15933 | 723 |
^method notNil |
724 |
ifTrue:[method programmingLanguage] |
|
725 |
ifFalse:[SmalltalkLanguage instance] |
|
13426 | 726 |
|
727 |
"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
|
728 |
"Modified (format): / 02-08-2011 / 09:23:39 / cg" |
13426 | 729 |
! |
730 |
||
623 | 731 |
receiver |
732 |
"return the receiver of the context" |
|
18253 | 733 |
%{ /* NOCONTEXT */ |
734 |
#ifdef __SCHTEAM__ |
|
18289 | 735 |
return context._RETURN( self.asSTContinuation().stSelf(context) ); |
18253 | 736 |
#endif |
737 |
%}. |
|
623 | 738 |
^ receiver |
739 |
! |
|
740 |
||
4543 | 741 |
receiver:aCompiledCode |
742 |
"set the receiver of the message" |
|
743 |
||
4560
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
744 |
receiver := aCompiledCode. |
4543 | 745 |
|
4560
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
746 |
"/ need some aid for optimized code - |
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
747 |
"/ some machines have the arguments kept in register vars ... |
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
748 |
"/ 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
|
749 |
%{ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
750 |
#ifdef __SCHTEAM__ |
18190 | 751 |
ERROR("unimplemented"); |
752 |
#else |
|
4570 | 753 |
__UNFIXCONTEXT(self, 0); |
18190 | 754 |
#endif |
4560
618151751813
Need _UNFIXCONTEXT() when changing receiver.
Stefan Vogel <sv@exept.de>
parents:
4557
diff
changeset
|
755 |
%}. |
4543 | 756 |
|
757 |
! |
|
758 |
||
623 | 759 |
searchClass |
760 |
"this is the class where the method-lookup started; |
|
761 |
for normal sends, it is nil (or sometimes the receivers class). |
|
762 |
For supersends, its the superclass of the one, in which the |
|
763 |
caller was defined." |
|
764 |
||
765 |
searchClass notNil ifTrue:[^ searchClass]. |
|
766 |
^ receiver class |
|
767 |
! |
|
768 |
||
769 |
selector |
|
770 |
"return the selector of the method for which the context was created" |
|
771 |
||
772 |
^ selector |
|
536
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
773 |
! |
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
774 |
|
1 | 775 |
sender |
776 |
"return the sender of the context" |
|
777 |
||
536
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
778 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
779 |
#ifdef __SCHTEAM__ |
18406 | 780 |
STContinuation sender = self.sender(); |
781 |
if (sender == null) { |
|
782 |
return __c__._RETURN_nil(); |
|
783 |
} |
|
784 |
return __c__._RETURN(sender); |
|
18253 | 785 |
/* NOTREACHED */ |
18190 | 786 |
#else |
1668
41db5950f9ea
oops - con local variables are now renamed (last change in stc)
Claus Gittinger <cg@exept.de>
parents:
1492
diff
changeset
|
787 |
OBJ theContext; |
536
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
788 |
|
3508 | 789 |
theContext = __INST(sender_); |
949 | 790 |
/* |
791 |
* this special nil test is for the very first context (startup-context); |
|
792 |
* actually, its cosmetics, to avoid a visible nil>>nil context in the debugger. |
|
793 |
*/ |
|
2205 | 794 |
if (__isNonNilObject(theContext)) { |
949 | 795 |
|
15933 | 796 |
if (__isLazy(theContext)) { |
797 |
/* |
|
798 |
* this cannot happen |
|
799 |
*/ |
|
800 |
__PATCHUPCONTEXT(theContext); |
|
801 |
} |
|
802 |
if (! __isNonLIFO(theContext)) { |
|
803 |
/* |
|
804 |
* to be prepared for the worst situation |
|
805 |
* (the sender is not stored, so the trap won't catch it) |
|
806 |
* make the writeBarrier trigger manually. |
|
807 |
* We'll see, if this is really required. |
|
808 |
*/ |
|
809 |
theContext->o_space |= CATCHMARK; |
|
810 |
__markNonLIFO(theContext); |
|
811 |
} |
|
536
dcffd1753902
be safe, when accessing a contexts sender.
Claus Gittinger <cg@exept.de>
parents:
528
diff
changeset
|
812 |
} |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
813 |
RETURN (theContext); |
18190 | 814 |
#endif |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
815 |
%} |
1 | 816 |
! |
817 |
||
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
818 |
senderIsNil |
15319 | 819 |
"return true, if I have no sender. |
820 |
This little ugly piece of code is needed (instead of the obvious |
|
821 |
'sender isNil') because sender is a protected field, which cannot be |
|
822 |
directly accessed by smalltalk code. The reason is that the sender field |
|
823 |
is lazily filled in by the VM, in the sender-accessor, and is usually |
|
824 |
invalid until needed." |
|
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
825 |
|
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
826 |
%{ /* NOCONTEXT */ |
18412 | 827 |
#ifdef __SCHTEAM__ |
828 |
if (((STContinuation)self).caller == null) { |
|
829 |
return __c__._RETURN_true(); |
|
830 |
} |
|
831 |
return __c__._RETURN_false(); |
|
832 |
/* NOTREACHED */ |
|
833 |
#else |
|
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
834 |
if ( __INST(sender_) == nil ) { |
15933 | 835 |
RETURN (true); |
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
836 |
} |
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
837 |
RETURN (false); |
18412 | 838 |
#endif |
5422 | 839 |
%}. |
18289 | 840 |
^ self sender isNil |
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
841 |
! |
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
842 |
|
623 | 843 |
setLineNumber:aNumber |
844 |
"private entry for uncompiledCodeObject ..." |
|
1 | 845 |
|
623 | 846 |
lineNr := aNumber |
340 | 847 |
! |
848 |
||
5749 | 849 |
setNumArgs:nA numVars:nV |
850 |
"set the number of arguments and variables" |
|
851 |
||
852 |
%{ /* NOCONTEXT */ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
853 |
#ifdef __SCHTEAM__ |
18190 | 854 |
ERROR("unimplemented"); |
855 |
#else |
|
8910 | 856 |
INT flg; |
5749 | 857 |
|
858 |
flg = __intVal(__INST(flags)); |
|
859 |
flg = flg & ~(__NARG_MASK << __NARG_SHIFT); |
|
860 |
flg = flg & ~(__NVAR_MASK << __NVAR_SHIFT); |
|
861 |
flg = flg | __intVal(nA) << __NARG_SHIFT; |
|
862 |
flg = flg | __intVal(nV) << __NVAR_SHIFT; |
|
8913 | 863 |
__INST(flags) = __mkSmallInteger(flg); |
18190 | 864 |
#endif |
5749 | 865 |
%} |
866 |
! |
|
867 |
||
12841 | 868 |
tempAt:index |
8578 | 869 |
"return the n'th stack-temporary variable" |
870 |
||
871 |
^ self at:index |
|
872 |
! |
|
873 |
||
12841 | 874 |
temporaries |
202 | 875 |
"return an array filled with the temporaries of this context" |
876 |
||
308 | 877 |
|nonTemps mySize| |
202 | 878 |
|
18437 | 879 |
nonTemps := self argumentCount + self numVars. |
1810 | 880 |
mySize := self numTemps. |
3130 | 881 |
mySize == 0 ifTrue:[ |
18437 | 882 |
"/ little optimization here - avaoid creating empty containers |
883 |
^ #() |
|
3130 | 884 |
]. |
308 | 885 |
^ (Array new:mySize) replaceFrom:1 to:mySize with:self startingAt:nonTemps+1 |
1810 | 886 |
|
887 |
"Modified: 23.10.1996 / 16:20:00 / cg" |
|
202 | 888 |
! |
889 |
||
10 | 890 |
varAt:n |
891 |
"return the n'th local variable" |
|
892 |
||
18437 | 893 |
^ self at:(n + self argumentCount) |
10 | 894 |
! |
895 |
||
896 |
varAt:n put:value |
|
897 |
"set the n'th local variable - useful when the receiver should be restarted |
|
54 | 898 |
or continued" |
10 | 899 |
|
18437 | 900 |
self at:(n + self argumentCount) put:value |
10 | 901 |
! |
902 |
||
12841 | 903 |
vars |
623 | 904 |
"return an array filled with the local variables of this context" |
375 | 905 |
|
623 | 906 |
|nonVars mySize| |
360 | 907 |
|
18437 | 908 |
nonVars := self argumentCount. |
1810 | 909 |
mySize := self numVars. |
3130 | 910 |
mySize == 0 ifTrue:[ |
18437 | 911 |
"/ little optimization here - avaoid creating empty containers |
912 |
^ #() |
|
3130 | 913 |
]. |
623 | 914 |
^ (Array new:mySize) replaceFrom:1 to:mySize with:self startingAt:nonVars+1 |
1810 | 915 |
|
916 |
"Modified: 23.10.1996 / 16:20:06 / cg" |
|
1 | 917 |
! ! |
918 |
||
623 | 919 |
!Context methodsFor:'copying'! |
415 | 920 |
|
10943 | 921 |
deepCopyUsing:aDictionary postCopySelector:postCopySelector |
10136 | 922 |
|copyOfMe| |
3350
40dc4807a6d4
must catch #deppCopyUsing: instead of #deepCopy.
Claus Gittinger <cg@exept.de>
parents:
3324
diff
changeset
|
923 |
|
10136 | 924 |
copyOfMe := self shallowCopy. |
925 |
copyOfMe setSender:nil. |
|
13516
9bbdb9d05a51
changed: #deepCopyUsing:postCopySelector:
Claus Gittinger <cg@exept.de>
parents:
13473
diff
changeset
|
926 |
copyOfMe perform:postCopySelector withOptionalArgument:self and:aDictionary. |
10136 | 927 |
^ copyOfMe |
928 |
||
929 |
"Created: / 31-03-1998 / 15:51:14 / cg" |
|
13516
9bbdb9d05a51
changed: #deepCopyUsing:postCopySelector:
Claus Gittinger <cg@exept.de>
parents:
13473
diff
changeset
|
930 |
"Modified: / 21-07-2011 / 13:30:21 / cg" |
1 | 931 |
! ! |
932 |
||
15010 | 933 |
!Context methodsFor:'enumerating'! |
934 |
||
935 |
withAllSendersDo:aBlock |
|
936 |
"evaluate aBlock for me and all contexts of my sender chain" |
|
937 |
||
938 |
|con| |
|
939 |
||
940 |
con := self. |
|
941 |
[ con notNil ] whileTrue:[ |
|
15933 | 942 |
aBlock value:con. |
943 |
con := con sender. |
|
15010 | 944 |
] |
945 |
! ! |
|
946 |
||
77 | 947 |
!Context methodsFor:'error handling'! |
948 |
||
949 |
invalidReturn:returnValue |
|
950 |
"this message is sent by the VM, when a methods context |
|
951 |
which has already returned is about to return again. |
|
952 |
(i.e. about to execute a return from an already returned |
|
105 | 953 |
method in a block). |
141 | 954 |
We raise a signal here, to allow catching of that situation." |
77 | 955 |
|
406 | 956 |
" |
957 |
in previous versions of ST/X and ST-80, this was no error; |
|
958 |
(instead, a normal blockreturn was performed to the value-sender). |
|
959 |
From a note in comp.lang.smalltalk, I conclude that new ST-80 versions |
|
960 |
now raise an error if this happens. |
|
961 |
Comment out the raise below to get that (old) behavior |
|
962 |
BETTER REWRITE YOUR APPLICATION |
|
12841 | 963 |
" |
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
964 |
"/ old behavior: |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
965 |
"/ ^ returnValue |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
966 |
|
282 | 967 |
"/ new behavior: |
968 |
||
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
969 |
"/ 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
|
970 |
"/ use another error message. |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
971 |
|
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
972 |
(home notNil and:[home sender notNil]) ifTrue:[ |
15933 | 973 |
^ CannotReturnError |
974 |
raiseRequestWith:returnValue |
|
975 |
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
|
976 |
]. |
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
977 |
|
12841 | 978 |
^ CannotReturnError |
15933 | 979 |
raiseRequestWith:returnValue. |
282 | 980 |
|
3258
2d96bba62ff1
use another error message if attempting to
Claus Gittinger <cg@exept.de>
parents:
3182
diff
changeset
|
981 |
"Modified: / 2.2.1998 / 15:19:52 / cg" |
406 | 982 |
! |
983 |
||
984 |
invalidReturnOrRestart:returnValue |
|
15268 | 985 |
"this message is sent by the VM, when a method's or block's context |
986 |
which was compiled non-returnable is about to return again, |
|
987 |
or a non-restartable context is tried to be restarted. |
|
988 |
In ST/X, not all contexts are restartable/returnable. |
|
406 | 989 |
We raise a signal here, to allow catching of that situation." |
990 |
||
6002 | 991 |
^ CannotReturnError |
15933 | 992 |
raiseRequestWith:returnValue |
993 |
errorString:'method was compiled non-resumable' |
|
360 | 994 |
! |
995 |
||
996 |
invalidReturnOrRestartError:how with:value |
|
997 |
"common error reporter for restart/return errors" |
|
12841 | 998 |
|
360 | 999 |
self canReturn ifTrue:[ |
15933 | 1000 |
" |
1001 |
tried to return from/restart a context which is already dead |
|
1002 |
(i.e. the method/block has already executed a return) |
|
1003 |
" |
|
1004 |
^ CannotReturnError |
|
1005 |
raiseRequestWith:value |
|
1006 |
errorString:(how , ' context not on calling chain') |
|
360 | 1007 |
]. |
1008 |
" |
|
1009 |
tried to return from/restart a context of a method which was compiled |
|
1010 |
unrestartable or of a block (which is never restartable) |
|
1011 |
" |
|
12841 | 1012 |
^ CannotReturnError |
15933 | 1013 |
raiseRequestWith:value |
1014 |
errorString:(how , ' context cannot be restarted/returned from') |
|
77 | 1015 |
! ! |
1016 |
||
6404 | 1017 |
!Context methodsFor:'fixups'! |
1018 |
||
1019 |
fixAllLineNumbers |
|
1020 |
%{ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
1021 |
#ifdef __SCHTEAM__ |
18190 | 1022 |
ERROR("unimplemented"); |
1023 |
#else |
|
6404 | 1024 |
__PATCHUPCONTEXTS(__thisContext); |
6424 | 1025 |
__CONTEXTLINENOS(self); |
18190 | 1026 |
#endif |
6404 | 1027 |
%} |
1028 |
! ! |
|
1029 |
||
623 | 1030 |
!Context methodsFor:'minidebugger printing'! |
1031 |
||
1032 |
fullPrint |
|
12841 | 1033 |
"print the receiver, selector and args of the context |
623 | 1034 |
- used only for MiniDebuggers walkback print" |
1035 |
||
18264
72cfbcf4deb5
dont print on stdout, when sterr is wanted
Claus Gittinger <cg@exept.de>
parents:
18253
diff
changeset
|
1036 |
self receiverPrintString errorPrint. ' ' errorPrint. selector errorPrint. |
18437 | 1037 |
self argumentCount ~~ 0 ifTrue: [ |
1038 |
' ' errorPrint. self argsDisplayString errorPrint |
|
623 | 1039 |
]. |
16247 | 1040 |
' [' errorPrint. self lineNumber errorPrint. ']' errorPrintCR |
623 | 1041 |
|
1042 |
" |
|
1043 |
thisContext fullPrint |
|
1044 |
" |
|
1426 | 1045 |
|
1046 |
"Modified: 20.5.1996 / 10:27:14 / cg" |
|
623 | 1047 |
! |
1048 |
||
1049 |
fullPrintAll |
|
1050 |
"print a full walkback starting at the receiver |
|
1051 |
- used only for MiniDebuggers walkback print" |
|
1052 |
||
15010 | 1053 |
self withAllSendersDo:[:con | con fullPrint]. |
623 | 1054 |
|
1055 |
" |
|
1056 |
thisContext fullPrintAll |
|
1057 |
" |
|
2173 | 1058 |
! |
1059 |
||
4674 | 1060 |
fullPrintAllLevels:nOrNil |
1061 |
"print a full walkback starting at the receiver, only print n levels |
|
1062 |
- used only for MiniDebuggers walkback print" |
|
1063 |
||
1064 |
|context count| |
|
1065 |
||
1066 |
count := 0. |
|
1067 |
context := self. |
|
1068 |
[context notNil] whileTrue: [ |
|
15933 | 1069 |
context fullPrint. |
1070 |
context := context sender. |
|
1071 |
nOrNil notNil ifTrue:[ |
|
1072 |
(count := count+1) > nOrNil ifTrue:[^self]. |
|
1073 |
] |
|
4674 | 1074 |
] |
1075 |
||
1076 |
" |
|
6648 | 1077 |
thisContext fullPrintAllLevels:5 |
4674 | 1078 |
" |
1079 |
||
1080 |
"Created: / 3.9.1999 / 14:02:38 / ps" |
|
11540 | 1081 |
! |
1082 |
||
11542 | 1083 |
printAll |
1084 |
"print a full walkback starting at the receiver, only print n levels |
|
1085 |
- used only for MiniDebuggers walkback print" |
|
1086 |
||
1087 |
self printAllLevels:nil |
|
1088 |
||
1089 |
" |
|
1090 |
thisContext printAll |
|
1091 |
" |
|
1092 |
! |
|
1093 |
||
11540 | 1094 |
printAllLevels:nOrNil |
1095 |
"print a full walkback starting at the receiver, only print n levels |
|
1096 |
- used only for MiniDebuggers walkback print" |
|
1097 |
||
1098 |
|context count| |
|
1099 |
||
1100 |
count := 0. |
|
1101 |
context := self. |
|
16247 | 1102 |
'--------------------------' errorPrintCR. |
11540 | 1103 |
[context notNil] whileTrue: [ |
18190 | 1104 |
context errorPrintCR. |
1105 |
context := context sender. |
|
1106 |
nOrNil notNil ifTrue:[ |
|
1107 |
(count := count+1) > nOrNil ifTrue:[ |
|
1108 |
'--------------------------' errorPrintCR. |
|
1109 |
^ self |
|
1110 |
]. |
|
1111 |
] |
|
11545 | 1112 |
]. |
16247 | 1113 |
'--------------------------' errorPrintCR. |
11540 | 1114 |
|
1115 |
" |
|
1116 |
thisContext printAllLevels:5 |
|
1117 |
" |
|
623 | 1118 |
! ! |
1119 |
||
1 | 1120 |
!Context methodsFor:'non local control flow'! |
1121 |
||
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1122 |
evaluateUnwindActionsUpTo:aContext |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1123 |
"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
|
1124 |
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
|
1125 |
marked using #markForUnwind. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1126 |
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
|
1127 |
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
|
1128 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1129 |
|con unwindBlock| |
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 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1132 |
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
|
1133 |
" |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1134 |
con := self findNextUnwindContextOr:aContext. |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1135 |
[con notNil and:[con ~~ aContext]] whileTrue:[ |
15933 | 1136 |
unwindBlock := con receiver unwindHandlerInContext:con. |
1137 |
con unmarkForUnwind. |
|
1138 |
unwindBlock value. |
|
1139 |
||
1140 |
con := con findNextUnwindContextOr:aContext. |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1141 |
]. |
11340
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1142 |
"/ 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
|
1143 |
(con notNil and:[con isMarkedForUnwind]) ifTrue:[ |
15933 | 1144 |
unwindBlock := con receiver unwindHandlerInContext:con. |
1145 |
con unmarkForUnwind. |
|
1146 |
unwindBlock value. |
|
11340
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
1147 |
]. |
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1148 |
^ con |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1149 |
! |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1150 |
|
15688 | 1151 |
resend |
1152 |
"EXPERIMENTAL: resend the context's message (to the same receiver). |
|
1153 |
if the method's implementation has been changed in the meanwhile (for example, in the debugger), |
|
1154 |
the new code is executed. Otherwise the same code is reexecuted from the start." |
|
1155 |
||
1156 |
self returnDoing:[ receiver perform:selector withArguments:(self args) ]. |
|
1157 |
||
1158 |
" |
|
1159 |
when we arrive here, something went wrong. |
|
1160 |
debugging ... |
|
1161 |
" |
|
1162 |
^ self invalidReturnOrRestartError:#'resend' with:nil |
|
1163 |
! |
|
1164 |
||
1 | 1165 |
restart |
1166 |
"restart the receiver - i.e. the method is evaluated again. |
|
402 | 1167 |
if the context to restart already died, trigger an error. |
141 | 1168 |
This is a low level helper for unwindAndRestart. |
1169 |
||
12841 | 1170 |
NOTICE: |
15933 | 1171 |
NO unwind actions are performed - this is usually not |
1172 |
what you want (see Context>>unwindAndRestart). |
|
12841 | 1173 |
|
1174 |
LIMITATION: |
|
15933 | 1175 |
currently a context can only be restarted by |
1176 |
the owning process - not from outside. |
|
1177 |
Also, the compiler has an option (+optcontext) to create |
|
1178 |
non-restartable contexts (which are faster). |
|
1179 |
If such a context is restarted, a runtime error is raised." |
|
1 | 1180 |
|
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1181 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
1182 |
#ifdef __SCHTEAM__ |
18364 | 1183 |
return __c__.RESTART(self); |
1184 |
/* NOTREACHED */ |
|
18190 | 1185 |
#else |
15650 | 1186 |
if (__INST(sender_) == nil) { |
15933 | 1187 |
RETURN(nil); |
15650 | 1188 |
} else { |
15933 | 1189 |
__RESUMECONTEXT__(self, RESTART_VALUE, 0); |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1190 |
} |
18190 | 1191 |
#endif |
360 | 1192 |
%}. |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1193 |
|
69 | 1194 |
" |
360 | 1195 |
when we arrive here, something went wrong. |
69 | 1196 |
debugging ... |
1197 |
" |
|
360 | 1198 |
^ self invalidReturnOrRestartError:#restart with:nil |
1 | 1199 |
! |
1200 |
||
623 | 1201 |
resume |
1202 |
"resume execution in this context. I.e. as if the method called |
|
1203 |
last by the receiver did a ^ nil. |
|
1204 |
If the context has already returned, report an error. |
|
1205 |
||
1206 |
NOTICE: |
|
15933 | 1207 |
NO unwind actions are performed (see Context>>unwind). |
12841 | 1208 |
|
1209 |
LIMITATION: |
|
15933 | 1210 |
currently a context can only be resumed by |
1211 |
the owning process - not from outside. |
|
1212 |
Also, the compiler has an option (+optcontext) to create |
|
1213 |
non-resumable contexts (which are faster). |
|
1214 |
If such a context is restarted, a runtime error is raised." |
|
623 | 1215 |
|
1216 |
^ self resume:nil |
|
1217 |
! |
|
1218 |
||
1219 |
resume:value |
|
1220 |
"resume the receiver - as if it got 'value' from whatever |
|
1221 |
it called. This continues execution in the receivers method |
|
1222 |
after the point where it did its last send. |
|
12841 | 1223 |
If the context has already returned - report an error. |
623 | 1224 |
|
1225 |
NOTICE: |
|
15933 | 1226 |
NO unwind actions are performed (see Context>>unwind:). |
623 | 1227 |
|
12841 | 1228 |
LIMITATION: |
15933 | 1229 |
currently a context can only be resumed by |
1230 |
the owning process - not from outside. |
|
1231 |
Also, the compiler has an option (+optcontext) to create |
|
1232 |
non-resumable contexts (which are faster). |
|
1233 |
If such a context is restarted, a runtime error is raised." |
|
623 | 1234 |
|
1668
41db5950f9ea
oops - con local variables are now renamed (last change in stc)
Claus Gittinger <cg@exept.de>
parents:
1492
diff
changeset
|
1235 |
|theContext| |
623 | 1236 |
|
1237 |
" |
|
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
1238 |
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
|
1239 |
(i.e. the one that I have called) and return from it. |
623 | 1240 |
" |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1241 |
|
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
1242 |
%{ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
1243 |
#ifdef __SCHTEAM__ |
18408 | 1244 |
return __c__._RETURN_TO(value, self.asSTContinuation()); |
1245 |
/* NOTREACHED */ |
|
18190 | 1246 |
#else |
4557 | 1247 |
OBJ sndr; |
1248 |
||
2510
393a51424d60
avoid marking context as nonLifo (in unwind:)
Claus Gittinger <cg@exept.de>
parents:
2368
diff
changeset
|
1249 |
theContext = __thisContext; |
4557 | 1250 |
while (theContext != nil) { |
15933 | 1251 |
sndr = __ContextInstPtr(theContext)->c_sender; |
1252 |
if (sndr == self) break; |
|
1253 |
theContext = sndr; |
|
623 | 1254 |
} |
3508 | 1255 |
if (theContext != nil) { |
15933 | 1256 |
if (__isLazy(theContext)) { |
1257 |
__PATCHUPCONTEXT(theContext); |
|
1258 |
} |
|
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1259 |
} |
18190 | 1260 |
#endif |
623 | 1261 |
%}. |
1262 |
||
1668
41db5950f9ea
oops - con local variables are now renamed (last change in stc)
Claus Gittinger <cg@exept.de>
parents:
1492
diff
changeset
|
1263 |
theContext isNil ifTrue:[ |
15933 | 1264 |
" |
1265 |
tried to resume in context which is already dead |
|
1266 |
(i.e. the method/block has already executed a return) |
|
1267 |
" |
|
1268 |
^ thisContext invalidReturnOrRestartError:#'resume:' with:value |
|
623 | 1269 |
]. |
1668
41db5950f9ea
oops - con local variables are now renamed (last change in stc)
Claus Gittinger <cg@exept.de>
parents:
1492
diff
changeset
|
1270 |
^ theContext return:value |
623 | 1271 |
! |
1272 |
||
4557 | 1273 |
resumeIgnoringErrors:value |
1274 |
"resume the receiver - as if it got 'value' from whatever |
|
1275 |
it called. This continues execution in the receivers method |
|
1276 |
after the point where it did its last send. |
|
12841 | 1277 |
If the context has already returned - simply return. |
4557 | 1278 |
|
1279 |
NOTICE: |
|
15933 | 1280 |
NO unwind actions are performed (see Context>>unwind:). |
4557 | 1281 |
|
12841 | 1282 |
LIMITATION: |
15933 | 1283 |
currently a context can only be resumed by |
1284 |
the owning process - not from outside. |
|
1285 |
Also, the compiler has an option (+optcontext) to create |
|
1286 |
non-resumable contexts (which are faster). |
|
1287 |
If such a context is restarted, a runtime error is raised." |
|
4557 | 1288 |
|
1289 |
" |
|
1290 |
starting with this context, find the one below |
|
1291 |
(i.e. the one that I have called) and return from it. |
|
1292 |
" |
|
1293 |
||
1294 |
%{ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
1295 |
#ifdef __SCHTEAM__ |
18408 | 1296 |
return __c__._RETURN_TO(value, self.asSTContinuation()); |
1297 |
/* NOTREACHED */ |
|
18190 | 1298 |
#else |
4557 | 1299 |
OBJ theContext, sndr; |
1300 |
||
1301 |
theContext = __thisContext; |
|
1302 |
while (theContext != nil) { |
|
15933 | 1303 |
sndr = __ContextInstPtr(theContext)->c_sender; |
1304 |
if (sndr == self) break; |
|
1305 |
theContext = sndr; |
|
4557 | 1306 |
} |
1307 |
if (theContext != nil) { |
|
15933 | 1308 |
if (__ContextInstPtr(theContext)->c_sender) { |
1309 |
if (!((INT)(__ContextInstPtr(theContext)->c_flags) & __MASKSMALLINT(__CANNOT_RETURN))) { |
|
1310 |
__RESUMECONTEXT__(theContext, value, 0); |
|
1311 |
} |
|
1312 |
} |
|
4557 | 1313 |
} |
18190 | 1314 |
#endif |
4557 | 1315 |
%}. |
1316 |
||
1317 |
"/ no error reporting |
|
1318 |
! |
|
1319 |
||
1320 |
resumeOnErrorProceed:value |
|
1321 |
"resume the receiver - as if it got 'value' from whatever |
|
1322 |
it called. This continues execution in the receivers method |
|
1323 |
after the point where it did its last send. |
|
12841 | 1324 |
If the context has already returned - simply return. |
4557 | 1325 |
|
1326 |
NOTICE: |
|
15933 | 1327 |
NO unwind actions are performed (see Context>>unwind:). |
4557 | 1328 |
|
12841 | 1329 |
LIMITATION: |
15933 | 1330 |
currently a context can only be resumed by |
1331 |
the owning process - not from outside. |
|
1332 |
Also, the compiler has an option (+optcontext) to create |
|
1333 |
non-resumable contexts (which are faster). |
|
1334 |
If such a context is restarted, a runtime error is raised." |
|
4557 | 1335 |
|
1336 |
" |
|
1337 |
starting with this context, find the one below |
|
1338 |
(i.e. the one that I have called) and return from it. |
|
1339 |
" |
|
1340 |
||
1341 |
%{ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
1342 |
#ifdef __SCHTEAM__ |
18408 | 1343 |
return __c__._RETURN_TO(value, self.asSTContinuation()); |
1344 |
/* NOTREACHED */ |
|
18190 | 1345 |
#else |
4557 | 1346 |
OBJ theContext, sndr; |
1347 |
||
1348 |
theContext = __thisContext; |
|
1349 |
while (theContext != nil) { |
|
15933 | 1350 |
sndr = __ContextInstPtr(theContext)->c_sender; |
1351 |
if (sndr == self) break; |
|
1352 |
theContext = sndr; |
|
4557 | 1353 |
} |
1354 |
if (theContext != nil) { |
|
15933 | 1355 |
if (__ContextInstPtr(theContext)->c_sender) { |
1356 |
__RESUMECONTEXT__(theContext, value, 0); |
|
1357 |
} |
|
4557 | 1358 |
} |
18190 | 1359 |
#endif |
4557 | 1360 |
%}. |
1361 |
||
1362 |
"/ no error reporting |
|
1363 |
! |
|
1364 |
||
69 | 1365 |
return |
141 | 1366 |
"return from this context with nil. I.e. as if it did a ^ nil. |
1367 |
NOTICE: |
|
15933 | 1368 |
NO unwind actions are performed - this is usually not |
1369 |
what you want (See Context>>unwind). |
|
1370 |
This is a low level method - a helper for unwind. |
|
12841 | 1371 |
|
1372 |
LIMITATION: |
|
15933 | 1373 |
currently a context can only be returned by |
1374 |
the owning process - not from outside. |
|
1375 |
Also, the compiler has an option (+optcontext) to create |
|
1376 |
non-returnable contexts (which are faster). |
|
1377 |
If such a context is restarted, a runtime error is raised." |
|
141 | 1378 |
|
1379 |
^ self return:nil |
|
1 | 1380 |
! |
1381 |
||
69 | 1382 |
return:value |
1383 |
"return from this context as if it did a '^ value'. |
|
141 | 1384 |
NOTICE: |
15933 | 1385 |
NO unwind actions are performed - this is usually not |
1386 |
what you want (See Context>>unwind:). |
|
1387 |
This is a low level method - a helper for unwind. |
|
141 | 1388 |
|
12841 | 1389 |
LIMITATION: |
15933 | 1390 |
currently a context can only be returned by |
1391 |
the owning process - not from outside. |
|
1392 |
Also, the compiler has an option (+optcontext) to create |
|
1393 |
non-returnable contexts (which are faster). |
|
1394 |
If such a context is restarted, a runtime error is raised." |
|
1 | 1395 |
|
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1396 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
1397 |
#ifdef __SCHTEAM__ |
18408 | 1398 |
return __c__._RETURN_FROM(value, self.asSTContinuation()); |
1399 |
/* NOTREACHED */ |
|
18190 | 1400 |
#else |
15651 | 1401 |
if (__INST(sender_) == nil) { |
15933 | 1402 |
RETURN(nil); |
15651 | 1403 |
} else { |
15933 | 1404 |
__RESUMECONTEXT__(self, value, 0); |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1405 |
} |
18190 | 1406 |
#endif |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1407 |
%}. |
1 | 1408 |
|
69 | 1409 |
" |
360 | 1410 |
when we arrive here, something went wrong. |
69 | 1411 |
debugging ... |
1412 |
" |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1413 |
^ self invalidReturnOrRestartError:#'return' with:value |
1 | 1414 |
! |
1415 |
||
328 | 1416 |
returnDoing:aBlock |
1417 |
"return from this context as if it did a '^ aBlock value'. |
|
1418 |
The block is evaluated as if called by the receiver context; |
|
1419 |
NOT the true executing context. |
|
1420 |
NOTICE: |
|
15933 | 1421 |
NO unwind actions are performed - this is usually not |
1422 |
what you want (See Context>>unwindThenDo:). |
|
1423 |
This is a low level method - a helper for unwind. |
|
328 | 1424 |
|
1425 |
LIMITATION: |
|
15933 | 1426 |
currently a context can only be returned by |
1427 |
the owning process - not from outside. |
|
1428 |
Also, the compiler has an option (+optcontext) to create |
|
1429 |
non-returnable contexts (which are faster). |
|
1430 |
If such a context is restarted, a runtime error is raised." |
|
328 | 1431 |
|
12841 | 1432 |
%{ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
1433 |
#ifdef __SCHTEAM__ |
18190 | 1434 |
ERROR("unimplemented"); |
1435 |
#else |
|
15651 | 1436 |
if (__INST(sender_) == nil) { |
15933 | 1437 |
RETURN(nil); |
15651 | 1438 |
} else { |
15933 | 1439 |
__RESUMECONTEXT__(self, aBlock, 2); |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1440 |
} |
18190 | 1441 |
#endif |
360 | 1442 |
%}. |
2368
f13bc879cb45
dont allow direct access to sender
Claus Gittinger <cg@exept.de>
parents:
2291
diff
changeset
|
1443 |
|
328 | 1444 |
" |
360 | 1445 |
when we arrive here, something went wrong. |
328 | 1446 |
debugging ... |
1447 |
" |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1448 |
^ self invalidReturnOrRestartError:#'returnDoing' with:aBlock |
328 | 1449 |
! |
1450 |
||
1 | 1451 |
unwind |
69 | 1452 |
"return nil from the receiver - i.e. simulate a '^ nil'. |
11337 | 1453 |
If the context has already returned, report an error. |
1 | 1454 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
69 | 1455 |
and Block>>valueOnUnwindDo: on the way. |
1 | 1456 |
|
12841 | 1457 |
LIMITATION: |
15933 | 1458 |
currently a context can only be unwound by |
1459 |
the owning process - not from outside. |
|
1460 |
i.e. it is not possible for one thread to unwind |
|
1461 |
another threads context - which does not make sense anyway. |
|
1462 |
However, you can force another thread to do this in its own process |
|
1463 |
context, by giving it an interrupt action - this does make sense. |
|
1464 |
||
1465 |
Also, the compiler has an option (+optcontext) to create |
|
1466 |
non-returnable contexts (which are faster). |
|
1467 |
If such a context is restarted, a runtime error is raised." |
|
141 | 1468 |
|
1469 |
^ self unwind:nil |
|
1 | 1470 |
! |
1471 |
||
1472 |
unwind:value |
|
69 | 1473 |
"return value from the receiver - i.e. simulate a '^ value'. |
360 | 1474 |
If the context has already returned , report an error. |
1 | 1475 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
69 | 1476 |
and Block>>valueOnUnwindDo: on the way. |
141 | 1477 |
|
12841 | 1478 |
LIMITATION: |
15933 | 1479 |
currently a context can only be unwound by |
1480 |
the owning process - not from outside. |
|
1481 |
i.e. it is not possible for one thread to unwind |
|
1482 |
another threads context - which does not make sense anyway. |
|
1483 |
However, you can force another thread to do this in its own process |
|
1484 |
context, by giving it an interrupt action - this does make sense. |
|
1485 |
||
1486 |
Also, the compiler has an option (+optcontext) to create |
|
1487 |
non-returnable contexts (which are faster). |
|
1488 |
If such a context is restarted, a runtime error is raised." |
|
1 | 1489 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1490 |
|con| |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1491 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1492 |
self senderIsNil ifFalse:[ |
15933 | 1493 |
con := thisContext evaluateUnwindActionsUpTo:self. |
141 | 1494 |
]. |
1 | 1495 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1496 |
"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
|
1497 |
(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
|
1498 |
should we check for this situation first and NOT evaluate |
141 | 1499 |
the unwind actions in this case ?) |
1500 |
" |
|
69 | 1501 |
con isNil ifTrue:[ |
15933 | 1502 |
" |
1503 |
tried to return to a context which is already dead |
|
1504 |
(i.e. the method/block has already executed a return) |
|
1505 |
" |
|
1506 |
^ self invalidReturnOrRestartError:#'unwind:' with:value |
|
69 | 1507 |
]. |
141 | 1508 |
" |
1509 |
now, that all unwind-actions are done, I can use the |
|
1510 |
low-level return ... |
|
1511 |
" |
|
1512 |
^ self return:value |
|
1513 |
! |
|
1514 |
||
1515 |
unwindAndRestart |
|
1516 |
"restart the receiver - i.e. the method is evaluated again. |
|
13804 | 1517 |
if the context to restart already did report an error. |
141 | 1518 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
1519 |
and Block>>valueOnUnwindDo: before restarting. |
|
1520 |
||
12841 | 1521 |
LIMITATION: |
15933 | 1522 |
a context can only be restarted by |
1523 |
the owning process - not from outside. |
|
1524 |
i.e. it is not possible for one thread to unwindAndRestart |
|
1525 |
another threads context - which does not make sense anyway. |
|
1526 |
However, you can force another thread to do this in its own process |
|
1527 |
context, by giving it an interrupt action - this does make sense. |
|
1528 |
||
1529 |
Also, the compiler has an option (+optcontext) to create |
|
1530 |
non-restartable contexts (which are faster). |
|
1531 |
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
|
1532 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1533 |
|con| |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1534 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1535 |
self senderIsNil ifFalse:[ |
15933 | 1536 |
con := thisContext evaluateUnwindActionsUpTo:self. |
141 | 1537 |
]. |
1538 |
||
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1539 |
"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
|
1540 |
(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
|
1541 |
should we check for this situation first and NOT evaluate |
141 | 1542 |
the unwind actions in this case ?) |
1543 |
" |
|
1544 |
con isNil ifTrue:[ |
|
15933 | 1545 |
" |
1546 |
tried to return to a context which is already dead |
|
1547 |
(i.e. the method/block has already executed a return) |
|
1548 |
" |
|
1549 |
^ self invalidReturnOrRestartError:#'unwindAndRestart:' with:nil |
|
141 | 1550 |
]. |
1551 |
" |
|
1552 |
now, that all unwind-actions are done, I can use the |
|
1553 |
low-level restart ... |
|
1554 |
" |
|
1555 |
^ self restart |
|
328 | 1556 |
! |
1557 |
||
4485 | 1558 |
unwindAndResume:value |
1559 |
"resume execution in the the receiver - i.e. simulate a '^ value' |
|
1560 |
from whatever it called last. |
|
1561 |
If the context has already returned , report an error. |
|
1562 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
|
1563 |
and Block>>valueOnUnwindDo: on the way. |
|
1564 |
||
12841 | 1565 |
LIMITATION: |
15933 | 1566 |
currently a context can only be unwound by |
1567 |
the owning process - not from outside. |
|
1568 |
i.e. it is not possible for one thread to unwind |
|
1569 |
another threads context - which does not make sense anyway. |
|
1570 |
However, you can force another thread to do this in its own process |
|
1571 |
context, by giving it an interrupt action - this does make sense. |
|
1572 |
||
1573 |
Also, the compiler has an option (+optcontext) to create |
|
1574 |
non-returnable contexts (which are faster). |
|
1575 |
If such a context is restarted, a runtime error is raised." |
|
4485 | 1576 |
|
1577 |
|con| |
|
1578 |
||
1579 |
self senderIsNil ifFalse:[ |
|
15933 | 1580 |
con := thisContext evaluateUnwindActionsUpTo:self. |
4485 | 1581 |
]. |
1582 |
||
1583 |
"oops, if nil, I am not on the calling chain; |
|
1584 |
(bad bad, unwind action have already been performed. |
|
1585 |
should we check for this situation first and NOT evaluate |
|
1586 |
the unwind actions in this case ?) |
|
1587 |
" |
|
1588 |
con isNil ifTrue:[ |
|
15933 | 1589 |
" |
1590 |
tried to return to a context which is already dead |
|
1591 |
(i.e. the method/block has already executed a return) |
|
1592 |
" |
|
1593 |
^ self invalidReturnOrRestartError:#'unwindAndResume:' with:value |
|
4485 | 1594 |
]. |
1595 |
" |
|
1596 |
now, that all unwind-actions are done, I can use the |
|
1597 |
low-level resume ... |
|
1598 |
" |
|
1599 |
^ self resume:value |
|
1600 |
! |
|
1601 |
||
12841 | 1602 |
unwindThenDo:aBlock |
328 | 1603 |
"return the value of aBlock from the receiver - i.e. simulate a '^ aBlock value'. |
13804 | 1604 |
If the context has already returned, report an error. |
328 | 1605 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
1606 |
and Block>>valueOnUnwindDo: on the way. |
|
1607 |
The block is evaluated AFTER all unwind actions are performed |
|
15688 | 1608 |
(i.e. the block's sender will be the receiving context, not the |
402 | 1609 |
currently executing context) |
328 | 1610 |
|
12841 | 1611 |
LIMITATION: |
15933 | 1612 |
currently a context can only be unwound by |
1613 |
the owning process - not from outside |
|
1614 |
i.e. it is not possible for one thread to unwindThenDo |
|
1615 |
another threads context - which does not make sense anyway. |
|
1616 |
However, you can force another thread to do this in its own process |
|
1617 |
context, by giving it an interrupt action - this does make sense. |
|
1618 |
||
1619 |
Also, the compiler has an option (+optcontext) to create |
|
1620 |
non-returnable contexts (which are faster). |
|
1621 |
If such a context is restarted, a runtime error is raised." |
|
328 | 1622 |
|
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1623 |
|con| |
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1624 |
|
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1625 |
self senderIsNil ifFalse:[ |
15933 | 1626 |
con := thisContext evaluateUnwindActionsUpTo:self. |
328 | 1627 |
]. |
1628 |
||
4477
ef99343d6756
better #unwind - ask receiver for handler block
Claus Gittinger <cg@exept.de>
parents:
4464
diff
changeset
|
1629 |
"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
|
1630 |
(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
|
1631 |
should we check for this situation first and NOT evaluate |
328 | 1632 |
the unwind actions in this case ?) |
1633 |
" |
|
1634 |
con isNil ifTrue:[ |
|
15933 | 1635 |
" |
1636 |
tried to return to a context which is already dead |
|
1637 |
(i.e. the method/block has already executed a return) |
|
1638 |
" |
|
1639 |
^ self invalidReturnOrRestartError:#'unwindThenDo:' with:aBlock |
|
328 | 1640 |
]. |
1641 |
" |
|
1642 |
now, that all unwind-actions are done, I can use the |
|
1643 |
low-level return ... |
|
1644 |
" |
|
12841 | 1645 |
^ self returnDoing:aBlock |
15688 | 1646 |
! |
1647 |
||
1648 |
unwindThenResend |
|
1649 |
"EXPERIMENTAL: resend the context's message (to the same receiver). |
|
1650 |
if the method's implementation has been changed in the meanwhile (for example, in the debugger), |
|
1651 |
the new code is executed. Otherwise the same code is reexecuted from the start. |
|
1652 |
Evaluate all unwind-blocks as specified in Block>>valueNowOrOnUnwind: |
|
1653 |
and Block>>valueOnUnwindDo: on the way. |
|
1654 |
The resend happens AFTER all unwind actions are performed |
|
1655 |
||
1656 |
LIMITATION: |
|
15933 | 1657 |
currently a context can only be unwound by |
1658 |
the owning process - not from outside |
|
1659 |
i.e. it is not possible for one thread to unwindThenDo |
|
1660 |
another threads context - which does not make sense anyway. |
|
1661 |
However, you can force another thread to do this in its own process |
|
1662 |
context, by giving it an interrupt action - this does make sense. |
|
1663 |
||
1664 |
Also, the compiler has an option (+optcontext) to create |
|
1665 |
non-returnable contexts (which are faster). |
|
1666 |
If such a context is restarted, a runtime error is raised." |
|
15688 | 1667 |
|
1668 |
|con| |
|
1669 |
||
1670 |
self senderIsNil ifFalse:[ |
|
15933 | 1671 |
con := thisContext evaluateUnwindActionsUpTo:self. |
15688 | 1672 |
]. |
1673 |
||
1674 |
"oops, if nil, I am not on the calling chain; |
|
1675 |
(bad bad, unwind action have already been performed. |
|
1676 |
should we check for this situation first and NOT evaluate |
|
1677 |
the unwind actions in this case ?) |
|
1678 |
" |
|
1679 |
con isNil ifTrue:[ |
|
15933 | 1680 |
" |
1681 |
tried to return to a context which is already dead |
|
1682 |
(i.e. the method/block has already executed a return) |
|
1683 |
" |
|
1684 |
^ self invalidReturnOrRestartError:#'unwindThenResend' with:nil |
|
15688 | 1685 |
]. |
1686 |
||
1687 |
"/ now, that all unwind-actions are done, I can use the low-level resend... |
|
1688 |
^ self resend |
|
1 | 1689 |
! ! |
623 | 1690 |
|
1691 |
!Context methodsFor:'printing & storing'! |
|
1692 |
||
1070
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1693 |
argStringFor:someObject |
15644 | 1694 |
|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
|
1695 |
%{ |
18297
e0881b40ff42
safeReceiverName fix (was confusing and had wrong name)
Claus Gittinger <cg@exept.de>
parents:
18291
diff
changeset
|
1696 |
#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
|
1697 |
/* |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1698 |
* 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
|
1699 |
* 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
|
1700 |
* which may lead to sends to free objects. In normal operation, this 'cannot' happen. |
14051 | 1701 |
* However, these print methods are also invoked for low-level pointer errors, so better be prepared... |
12841 | 1702 |
*/ |
1070
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1703 |
if (__isNonNilObject(someObject) && (__qClass(someObject)==nil)) { |
15933 | 1704 |
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
|
1705 |
} |
18297
e0881b40ff42
safeReceiverName fix (was confusing and had wrong name)
Claus Gittinger <cg@exept.de>
parents:
18291
diff
changeset
|
1706 |
#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
|
1707 |
%}. |
11539 | 1708 |
s isNil ifTrue:[ |
15933 | 1709 |
s := someObject displayString. |
1710 |
s isNil ifTrue:[ |
|
1711 |
^ '**************** nil displayString of ',(someObject class name ? '??') |
|
1712 |
]. |
|
11539 | 1713 |
]. |
15933 | 1714 |
"/ JV@2013-04-26: Following is rubbish, the callers must handle string output correctly. |
15644 | 1715 |
"/ moreover storeString does not work on self-referencing structures, but that doesn't matter |
1716 |
"/ for wide strings. |
|
1717 |
"/ SV@2013-08-19: I checked/fixed the callers to use CharacterWriteStreams. |
|
1718 |
"/ s isWideString ifTrue:[ |
|
1719 |
"/ "make sure that the object really returns something we can stream into a string" |
|
1720 |
"/ s := someObject storeString. |
|
1721 |
"/ ]. |
|
11539 | 1722 |
^ 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
|
1723 |
! |
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1724 |
|
623 | 1725 |
argsDisplayString |
14051 | 1726 |
^ String streamContents:[:s | self displayArgsOn:s ]. |
1727 |
||
1728 |
"Modified (format): / 07-03-2012 / 13:11:17 / cg" |
|
623 | 1729 |
! |
1730 |
||
6648 | 1731 |
displayArgsOn:aStream |
15933 | 1732 |
| n "{ Class: SmallInteger }" |
15388 | 1733 |
s | |
6648 | 1734 |
|
18437 | 1735 |
n := self argumentCount. |
6648 | 1736 |
1 to:n do:[:index | |
18437 | 1737 |
Error handle:[:ex | |
1738 |
s := '*Error in argString*'. |
|
1739 |
] do:[ |
|
1740 |
s := self argStringFor:(self at:index). |
|
1741 |
s := s contractTo:100. |
|
1742 |
]. |
|
1743 |
||
1744 |
aStream nextPutAll:s asString string. |
|
1745 |
index ~~ n ifTrue:[ aStream space ]. |
|
6648 | 1746 |
]. |
14051 | 1747 |
|
1748 |
"Modified: / 07-03-2012 / 13:09:17 / cg" |
|
6648 | 1749 |
! |
1750 |
||
14293
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1751 |
displayOn:aGCOrStream |
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1752 |
"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
|
1753 |
|
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1754 |
"/ what a kludge - Dolphin and Squeak mean: printOn: a stream; |
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1755 |
"/ ST/X (and some old ST80's) mean: draw-yourself on a GC. |
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1756 |
(aGCOrStream isStream) ifFalse:[ |
15933 | 1757 |
^ super displayOn:aGCOrStream |
14293
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1758 |
]. |
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1759 |
|
15933 | 1760 |
aGCOrStream |
1761 |
nextPutAll:self class name; |
|
1762 |
nextPut:$(. |
|
14293
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1763 |
self printOn:aGCOrStream. |
f1bc5da76f93
Implement #displayOn: instead of #displayString
Stefan Vogel <sv@exept.de>
parents:
14225
diff
changeset
|
1764 |
aGCOrStream nextPut:$). |
623 | 1765 |
! |
1766 |
||
6648 | 1767 |
fullPrintAllOn:aStream |
12789 | 1768 |
"print a full walkback (incl arguments) starting at the receiver" |
6648 | 1769 |
|
15010 | 1770 |
self withAllSendersDo:[:con | con fullPrintOn:aStream. aStream cr]. |
6648 | 1771 |
|
1772 |
" |
|
1773 |
thisContext fullPrintAllOn:Transcript |
|
1774 |
" |
|
1775 |
||
1776 |
"Created: 15.1.1997 / 18:09:05 / cg" |
|
1777 |
! |
|
1778 |
||
13612 | 1779 |
fullPrintAllString |
1780 |
"return a string containing the full walkback (incl. arguments)" |
|
1781 |
||
15644 | 1782 |
^ String streamContents:[:s | self fullPrintAllOn:s] |
13612 | 1783 |
|
1784 |
" |
|
1785 |
thisContext fullPrintAllString |
|
1786 |
" |
|
1787 |
||
1788 |
"Created: / 21-08-2011 / 07:37:36 / cg" |
|
1789 |
! |
|
1790 |
||
6648 | 1791 |
fullPrintOn:aStream |
12789 | 1792 |
"append a verbose description (incl. arguments) of the receiver onto aStream" |
6648 | 1793 |
|
15383 | 1794 |
self printReceiverOn:aStream. |
12841 | 1795 |
aStream nextPutAll:' >> '. |
11311 | 1796 |
self selector printOn:aStream. "show as string (as symbol looks too ugly in browser ...)" |
1797 |
"/ self selector storeOn:aStream. "show as symbol" |
|
8578 | 1798 |
|
6648 | 1799 |
self size ~~ 0 ifTrue: [ |
15933 | 1800 |
aStream space. |
1801 |
self displayArgsOn:aStream |
|
6648 | 1802 |
]. |
12841 | 1803 |
aStream nextPutAll:' {'. |
1804 |
self identityHash printOn:aStream. |
|
15383 | 1805 |
aStream nextPut:$}. |
12841 | 1806 |
|
1807 |
aStream nextPutAll:' ['. |
|
6648 | 1808 |
self lineNumber printOn:aStream. |
15383 | 1809 |
aStream nextPut:$]. |
6648 | 1810 |
|
1811 |
" |
|
1812 |
thisContext fullPrintOn:Transcript |
|
1813 |
" |
|
1814 |
||
1815 |
"Modified: 20.5.1996 / 10:27:14 / cg" |
|
1816 |
"Created: 15.1.1997 / 18:09:06 / cg" |
|
1817 |
! |
|
1818 |
||
623 | 1819 |
fullPrintString |
1820 |
"return a string describing the context - this includes the linenumber, |
|
1821 |
receiver printString and argument printString" |
|
1822 |
||
15644 | 1823 |
^ String streamContents:[:s | self fullPrintOn:s] |
623 | 1824 |
|
1825 |
" |
|
1826 |
thisContext fullPrintString |
|
1827 |
" |
|
1828 |
! |
|
1829 |
||
1830 |
methodPrintString |
|
12841 | 1831 |
"return a string describing the contexts method as 'implementorClass>>selector'" |
623 | 1832 |
|
1853
09cd1e8df9a2
use new Method>>who interface
Claus Gittinger <cg@exept.de>
parents:
1810
diff
changeset
|
1833 |
|mthd who| |
623 | 1834 |
|
1835 |
mthd := self method. |
|
1836 |
mthd notNil ifTrue:[ |
|
15933 | 1837 |
who := mthd who. |
1838 |
who notNil ifTrue:[ |
|
1839 |
^ who methodClass name , ' >> #' , who methodSelector |
|
1840 |
] |
|
623 | 1841 |
]. |
1842 |
^ mthd displayString. |
|
1843 |
||
1844 |
" |
|
12841 | 1845 |
thisContext methodPrintString |
1846 |
thisContext sender methodPrintString |
|
623 | 1847 |
" |
1853
09cd1e8df9a2
use new Method>>who interface
Claus Gittinger <cg@exept.de>
parents:
1810
diff
changeset
|
1848 |
|
09cd1e8df9a2
use new Method>>who interface
Claus Gittinger <cg@exept.de>
parents:
1810
diff
changeset
|
1849 |
"Modified: 1.11.1996 / 16:21:49 / cg" |
623 | 1850 |
! |
1851 |
||
12789 | 1852 |
printAllOn:aStream |
1853 |
"print a brief walkback (excl. arguments) starting at the receiver" |
|
1854 |
||
15010 | 1855 |
self withAllSendersDo:[:con | con printOn:aStream. aStream cr]. |
12789 | 1856 |
|
1857 |
" |
|
1858 |
thisContext printAllOn:Transcript |
|
1859 |
" |
|
1860 |
||
1861 |
"Created: 15.1.1997 / 18:09:05 / cg" |
|
1862 |
! |
|
1863 |
||
13612 | 1864 |
printAllString |
1865 |
"return a string containing the walkback (excl. arguments)" |
|
1866 |
||
1867 |
|s| |
|
1868 |
||
15383 | 1869 |
s := WriteStream on:''. |
13612 | 1870 |
self printAllOn:s. |
1871 |
^ s contents |
|
1872 |
||
1873 |
" |
|
1874 |
thisContext printAllString |
|
1875 |
" |
|
1876 |
||
1877 |
"Created: / 21-08-2011 / 07:38:05 / cg" |
|
1878 |
! |
|
1879 |
||
16223 | 1880 |
printClassNameOf:aClass on:aStream |
1881 |
"helper for printing" |
|
1882 |
||
16819
c96b396b7307
Oops, fix in Context >> printClassNameOf:on: for Java static methods
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
16818
diff
changeset
|
1883 |
| nonMeta | |
c96b396b7307
Oops, fix in Context >> printClassNameOf:on: for Java static methods
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
16818
diff
changeset
|
1884 |
|
c96b396b7307
Oops, fix in Context >> printClassNameOf:on: for Java static methods
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
16818
diff
changeset
|
1885 |
(nonMeta := aClass theNonMetaclass) isJavaClass ifTrue:[ |
c96b396b7307
Oops, fix in Context >> printClassNameOf:on: for Java static methods
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
16818
diff
changeset
|
1886 |
nonMeta javaName printOn: aStream |
16223 | 1887 |
] ifFalse:[ |
18190 | 1888 |
(aClass name ? '????') printOn:aStream. |
16223 | 1889 |
]. |
16818
2f2ff0820cef
Fixes in Context>>#printClassNameOf:on: / #printOn: for Java classes.
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
16797
diff
changeset
|
1890 |
|
16819
c96b396b7307
Oops, fix in Context >> printClassNameOf:on: for Java static methods
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
16818
diff
changeset
|
1891 |
"Modified: / 08-08-2014 / 09:39:24 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
16223 | 1892 |
! |
1893 |
||
623 | 1894 |
printOn:aStream |
12789 | 1895 |
"append a brief description (excl. arguments) of the receiver onto aStream" |
623 | 1896 |
|
16818
2f2ff0820cef
Fixes in Context>>#printClassNameOf:on: / #printOn: for Java classes.
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
16797
diff
changeset
|
1897 |
| m | |
2f2ff0820cef
Fixes in Context>>#printClassNameOf:on: / #printOn: for Java classes.
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
16797
diff
changeset
|
1898 |
|
15383 | 1899 |
self printReceiverOn:aStream. |
10549 | 1900 |
"/ aStream nextPutAll:' '. |
1901 |
aStream nextPutAll:' >> '. |
|
1902 |
||
1903 |
aStream bold. |
|
16818
2f2ff0820cef
Fixes in Context>>#printClassNameOf:on: / #printOn: for Java classes.
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
16797
diff
changeset
|
1904 |
m := self method. |
18190 | 1905 |
m isJavaMethod ifTrue:[ |
1906 |
aStream nextPutAll: (m printStringForBrowserWithSelector: self selector). |
|
16818
2f2ff0820cef
Fixes in Context>>#printClassNameOf:on: / #printOn: for Java classes.
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
16797
diff
changeset
|
1907 |
] ifFalse:[ |
18190 | 1908 |
self selector printOn:aStream. "show as string (as symbol looks too ugly in browser ...)" |
1909 |
"/ self selector storeOn:aStream. "show as symbol" |
|
16818
2f2ff0820cef
Fixes in Context>>#printClassNameOf:on: / #printOn: for Java classes.
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
16797
diff
changeset
|
1910 |
]. |
10549 | 1911 |
aStream normal. |
16569 | 1912 |
|
14225 | 1913 |
(method notNil and:[method isWrapped]) ifTrue:[ |
18190 | 1914 |
aStream nextPutAll:' (wrapped) ' |
14225 | 1915 |
]. |
16818
2f2ff0820cef
Fixes in Context>>#printClassNameOf:on: / #printOn: for Java classes.
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
16797
diff
changeset
|
1916 |
aStream nextPutAll:' ['. |
18190 | 1917 |
m isJavaMethod ifTrue:[ |
1918 |
aStream nextPutAll: self method mclass sourceFile ? '???' . |
|
1919 |
m isNative ifTrue:[ |
|
1920 |
aStream nextPutAll: ':in native code' |
|
1921 |
] ifFalse:[ |
|
1922 |
aStream nextPut: $:. |
|
1923 |
(m lineNumberForPC0: lineNr) ? '???' printOn: aStream. |
|
1924 |
]. |
|
16818
2f2ff0820cef
Fixes in Context>>#printClassNameOf:on: / #printOn: for Java classes.
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
16797
diff
changeset
|
1925 |
] ifFalse:[ |
18190 | 1926 |
self lineNumber printOn: aStream |
16818
2f2ff0820cef
Fixes in Context>>#printClassNameOf:on: / #printOn: for Java classes.
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
16797
diff
changeset
|
1927 |
]. |
2f2ff0820cef
Fixes in Context>>#printClassNameOf:on: / #printOn: for Java classes.
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
16797
diff
changeset
|
1928 |
aStream nextPut:$]. |
4393 | 1929 |
|
14302 | 1930 |
"Modified: / 05-08-2012 / 12:00:00 / cg" |
16818
2f2ff0820cef
Fixes in Context>>#printClassNameOf:on: / #printOn: for Java classes.
Jan Vrany <jan.vrany@fit.cvut.cz>
parents:
16797
diff
changeset
|
1931 |
"Modified: / 08-08-2014 / 07:37:24 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
623 | 1932 |
! |
1933 |
||
15383 | 1934 |
printReceiverOn:aStream |
1935 |
"print description of the receiver of the context to aStream" |
|
1936 |
||
1937 |
|receiverClass receiverClassName implementorClass| |
|
1938 |
||
18297
e0881b40ff42
safeReceiverName fix (was confusing and had wrong name)
Claus Gittinger <cg@exept.de>
parents:
18291
diff
changeset
|
1939 |
receiverClassName := self safeReceiverClassNameIfInvalid. |
15383 | 1940 |
receiverClassName notNil ifTrue:[ |
18190 | 1941 |
"if we come here, this is a context with an illegal class" |
1942 |
receiverClassName printOn:aStream. |
|
1943 |
^ self. |
|
15383 | 1944 |
]. |
1070
cf35b237612d
in argPrint: handle invalid objects (avoids crash in MiniDebugger when debugging bad primitives)
Claus Gittinger <cg@exept.de>
parents:
1051
diff
changeset
|
1945 |
|
623 | 1946 |
receiverClass := receiver class. |
15383 | 1947 |
|
1948 |
(receiverClass == SmallInteger or:[receiverClass == Float]) ifTrue:[ |
|
18190 | 1949 |
aStream nextPut:$(. receiver printOn:aStream. aStream nextPutAll:') '. |
15383 | 1950 |
]. |
16223 | 1951 |
self printClassNameOf:receiverClass on:aStream. |
15383 | 1952 |
|
1953 |
(selector notNil or:[method notNil]) ifTrue:[ |
|
18190 | 1954 |
"/ implementorClass := self searchClass whichClassIncludesSelector:selector. |
1955 |
||
1956 |
" |
|
1957 |
kludge to avoid slow search for containing class |
|
1958 |
" |
|
1959 |
(method notNil |
|
1960 |
or:[selector ~~ #doIt and:[selector ~~ #doIt:]]) ifTrue:[ |
|
1961 |
implementorClass := self methodClass. |
|
1962 |
implementorClass isNil ifTrue:[ |
|
1963 |
" |
|
1964 |
kludge for the frame called by a wrappedmethod; |
|
1965 |
the wrappedmethod is in the class, so its mclass is correct. |
|
1966 |
however, the originalmethod is invoked via performMethod, and its mclass |
|
1967 |
is nil. Care for this here. Think about keeping the mclass in the original method. |
|
1968 |
" |
|
1969 |
(method notNil and:[method isWrapped not]) ifTrue:[ |
|
1970 |
WrappedMethod notNil ifTrue:[ |
|
1971 |
WrappedMethod allWrappedMethodsDo:[:wrapped | |
|
1972 |
wrapped originalMethodIfWrapped == method ifTrue:[ |
|
1973 |
implementorClass := wrapped mclass. |
|
1974 |
]. |
|
1975 |
]. |
|
1976 |
]. |
|
1977 |
] |
|
1978 |
]. |
|
1979 |
]. |
|
1980 |
||
1981 |
implementorClass notNil ifTrue: [ |
|
1982 |
(implementorClass ~~ receiverClass) ifTrue: [ |
|
1983 |
aStream nextPut:$(. |
|
1984 |
self printClassNameOf:implementorClass on:aStream. |
|
1985 |
aStream nextPut:$). |
|
1986 |
] |
|
1987 |
] ifFalse:[ |
|
1988 |
| srchClass where | |
|
1989 |
||
1990 |
srchClass := self searchClass. |
|
1991 |
srchClass ~~ receiverClass ifTrue:[ |
|
1992 |
aStream nextPut:$(. |
|
1993 |
self printClassNameOf:srchClass on:aStream. |
|
1994 |
aStream nextPut:$). |
|
1995 |
]. |
|
1996 |
" |
|
1997 |
kludge for doIt - these unbound methods are not |
|
1998 |
found in the classes methodDictionary |
|
1999 |
" |
|
2000 |
true "(selector ~~ #doIt and:[selector ~~ #doIt:])" ifTrue:[ |
|
2001 |
" |
|
2002 |
kludge for methods invoked explicitly via valueWithReceiver... |
|
2003 |
" |
|
2004 |
(self sender notNil |
|
2005 |
and:[ self sender receiver isMethod |
|
2006 |
and:[ self sender selector startsWith:'valueWithReceiver:' ]]) ifTrue:[ |
|
2007 |
where := '(**DIRECTED**)'. |
|
2008 |
] ifFalse:[ |
|
2009 |
where := '(**NONE**)'. |
|
2010 |
]. |
|
2011 |
aStream nextPutAll:where |
|
2012 |
] |
|
2013 |
] |
|
623 | 2014 |
]. |
2015 |
||
15961 | 2016 |
"Created: / 23-10-2013 / 11:13:19 / Jan Vrany <jan.vrany@fit.cvut.cz>" |
2017 |
"Modified: / 05-02-2014 / 17:50:33 / cg" |
|
10549 | 2018 |
! |
2019 |
||
15383 | 2020 |
receiverPrintString |
2021 |
"return a string describing the receiver of the context" |
|
2022 |
||
2023 |
|s| |
|
2024 |
||
2025 |
s := WriteStream on:''. |
|
2026 |
self printReceiverOn:s. |
|
2027 |
^ s contents |
|
2028 |
||
2029 |
" |
|
15933 | 2030 |
thisContext receiverPrintString |
15383 | 2031 |
" |
2032 |
! |
|
2033 |
||
18297
e0881b40ff42
safeReceiverName fix (was confusing and had wrong name)
Claus Gittinger <cg@exept.de>
parents:
18291
diff
changeset
|
2034 |
safeReceiverClassNameIfInvalid |
e0881b40ff42
safeReceiverName fix (was confusing and had wrong name)
Claus Gittinger <cg@exept.de>
parents:
18291
diff
changeset
|
2035 |
"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
|
2036 |
return a replacement string. otherwise nil. |
10549 | 2037 |
This cares for invalid (free) objects which may appear with bad primitive code, |
2038 |
and prevents a crash in such a case." |
|
2039 |
||
2040 |
%{ |
|
18412 | 2041 |
#ifdef __SCHTEAM__ |
2042 |
return __c__._RETURN( ((STContinuation)self).stSelf(__c__) ); |
|
2043 |
#else |
|
10549 | 2044 |
/* |
2045 |
* special handling for (invalid) free objects. |
|
2046 |
* these only appear if some primitiveCode does not correctly use SEND macros, |
|
2047 |
* which may lead to sends to free objects. In normal operation, this 'cannot' happen. |
|
12841 | 2048 |
*/ |
10549 | 2049 |
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
|
2050 |
RETURN( __MKSTRING("FreeObject") ); |
10549 | 2051 |
} |
18297
e0881b40ff42
safeReceiverName fix (was confusing and had wrong name)
Claus Gittinger <cg@exept.de>
parents:
18291
diff
changeset
|
2052 |
#endif /* not SCHTEAM */ |
10549 | 2053 |
%}. |
18297
e0881b40ff42
safeReceiverName fix (was confusing and had wrong name)
Claus Gittinger <cg@exept.de>
parents:
18291
diff
changeset
|
2054 |
^ nil |
10549 | 2055 |
|
2056 |
"Created: / 21-05-2007 / 13:19:37 / cg" |
|
623 | 2057 |
! ! |
2058 |
||
7257 | 2059 |
!Context methodsFor:'private-accessing'! |
623 | 2060 |
|
11340
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
2061 |
isMarkedForUnwind |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
2062 |
"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
|
2063 |
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
|
2064 |
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
|
2065 |
|
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
2066 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2067 |
#ifdef __SCHTEAM__ |
18412 | 2068 |
return context._RETURN ( ((STContinuation)self).isMarkedForUnwind() ); |
18190 | 2069 |
#else |
18253 | 2070 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__UNWIND_MARK)) ? true : false ); |
18190 | 2071 |
#endif |
11340
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
2072 |
%} |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
2073 |
" |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
2074 |
thisContext isMarkedForUnwind |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
2075 |
" |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
2076 |
! |
ceae06796c52
unwinding fixed for on:do:ensure:
Claus Gittinger <cg@exept.de>
parents:
11337
diff
changeset
|
2077 |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2078 |
markForHandle |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2079 |
"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
|
2080 |
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
|
2081 |
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
|
2082 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2083 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2084 |
#ifdef __SCHTEAM__ |
18412 | 2085 |
((STContinuation)self).markForHandle(); |
18190 | 2086 |
#else |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2087 |
__INST(flags) = (OBJ)((INT)__INST(flags) | __MASKSMALLINT(__HANDLE_MARK)); |
18190 | 2088 |
#endif |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2089 |
%} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2090 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2091 |
"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
|
2092 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2093 |
|
753
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
2094 |
markForInterrupt |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
2095 |
"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
|
2096 |
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
|
2097 |
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
|
2098 |
|
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
2099 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2100 |
#ifdef __SCHTEAM__ |
18412 | 2101 |
((STContinuation)self).markForInterrupt(); |
18190 | 2102 |
#else |
753
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
2103 |
__markInterrupted(__ContextInstPtr(self)); |
18190 | 2104 |
#endif |
753
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
2105 |
%} |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
2106 |
! |
81d54fc53a18
added mechanism to force a stepInterrupt whenever a context returns or unwinds
Claus Gittinger <cg@exept.de>
parents:
749
diff
changeset
|
2107 |
|
1727 | 2108 |
markForInterruptOnUnwind |
2109 |
"set the interrupt-on-unwind flag in the receiver. |
|
2110 |
The VM will generate a stepInterrupt, when this context returns or |
|
2111 |
is unwound. This is used by the debugger for faster single-stepping; |
|
2112 |
- a highly internal mechanism and not for public use." |
|
2113 |
||
2114 |
%{ /* NOCONTEXT */ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2115 |
#ifdef __SCHTEAM__ |
18412 | 2116 |
((STContinuation)self).markForInterruptOnUnwind(); |
18190 | 2117 |
#else |
3508 | 2118 |
__INST(flags) = (OBJ)((INT)__INST(flags) | __MASKSMALLINT(__IRQ_ON_UNWIND)); |
18190 | 2119 |
#endif |
1727 | 2120 |
%} |
2121 |
! |
|
2122 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2123 |
markForRaise |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2124 |
"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
|
2125 |
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
|
2126 |
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
|
2127 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2128 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2129 |
#ifdef __SCHTEAM__ |
18412 | 2130 |
((STContinuation)self).markForRaise(); |
18190 | 2131 |
#else |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2132 |
__INST(flags) = (OBJ)((INT)__INST(flags) | __MASKSMALLINT(__RAISE_MARK)); |
18190 | 2133 |
#endif |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2134 |
%} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2135 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2136 |
"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
|
2137 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2138 |
|
623 | 2139 |
markForUnwind |
749 | 2140 |
"set the mark for unwind flag in the receiver. |
2141 |
The VM needs this to know that some special action is to be performed with |
|
2142 |
this context - a highly internal mechanism and not for public use." |
|
2143 |
||
623 | 2144 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2145 |
#ifdef __SCHTEAM__ |
18412 | 2146 |
((STContinuation)self).markForUnwind(); |
18190 | 2147 |
#else |
1133 | 2148 |
__INST(flags) = (OBJ)((INT)__INST(flags) | __MASKSMALLINT(__UNWIND_MARK)); |
18190 | 2149 |
#endif |
623 | 2150 |
%} |
749 | 2151 |
|
2152 |
"Modified: 13.12.1995 / 19:05:22 / cg" |
|
623 | 2153 |
! |
2154 |
||
5780 | 2155 |
setHome:aContext |
2156 |
"set the homeContext. |
|
2157 |
DANGER: this is for experimental, internal use only (byteCode interpreters)" |
|
2158 |
||
2159 |
home := aContext. |
|
2160 |
! |
|
2161 |
||
2162 |
setSender:aContext |
|
2163 |
"set the sender of the context. |
|
2164 |
DANGER: this is for experimental, internal use only (byteCode interpreters)" |
|
2165 |
||
2166 |
%{ /* NOCONTEXT */ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2167 |
#ifdef __SCHTEAM__ |
18412 | 2168 |
((STContinuation)self).caller = aContext.asSTContinuation(); |
18190 | 2169 |
#else |
5780 | 2170 |
__INST(sender_) = aContext; |
18190 | 2171 |
#endif |
5780 | 2172 |
%} |
2173 |
! |
|
2174 |
||
623 | 2175 |
unmarkForUnwind |
749 | 2176 |
"clear the mark for unwind flag in the receiver. |
2177 |
The VM needs this to know that some special action is to be performed with |
|
2178 |
this context - a highly internal mechanism and not for public use." |
|
2179 |
||
623 | 2180 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2181 |
#ifdef __SCHTEAM__ |
18412 | 2182 |
((STContinuation)self).unmarkForUnwind(); |
18190 | 2183 |
#else |
1133 | 2184 |
__INST(flags) = (OBJ)((INT)__INST(flags) & ~__MASKSMALLINT(__UNWIND_MARK)); |
18190 | 2185 |
#endif |
623 | 2186 |
%} |
2187 |
! ! |
|
2188 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2189 |
!Context methodsFor:'searching'! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2190 |
|
8284 | 2191 |
findExceptional |
12841 | 2192 |
"walk along the sender chain (starting with the sender), |
8284 | 2193 |
for a context which is marked as handle or raise context. |
2194 |
This non-standard interface is only to be used by exception" |
|
2195 |
||
2196 |
"/ this could have been (actually: was) implemented as: |
|
2197 |
"/ |
|
2198 |
"/ |con| |
|
2199 |
"/ |
|
2200 |
"/ con := self. |
|
2201 |
"/ [con notNil] whileTrue:[ |
|
2202 |
"/ [con isHandleContext] ifTrue:[^con]. |
|
2203 |
"/ [con isRaiseContext] ifTrue:[^con]. |
|
2204 |
"/ con := con sender. |
|
2205 |
"/ ]. |
|
2206 |
"/ ^ nil |
|
2207 |
"/ |
|
2208 |
"/ and the code below does exactly this (somewhat faster, though). |
|
2209 |
"/ |
|
2210 |
"/ (it avoids referencing all intermediate contexts, which would mark them special, |
|
2211 |
"/ although they aren't really - this is expert knowledge, no need to understand that ...) |
|
2212 |
||
2213 |
%{ /* NOCONTEXT */ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2214 |
#ifdef __SCHTEAM__ |
18253 | 2215 |
{ |
18412 | 2216 |
STContinuation lastCallee = (STContinuation)self; |
2217 |
STContinuation caller = lastCallee.caller; |
|
18406 | 2218 |
|
2219 |
while (caller != null) { |
|
18253 | 2220 |
if (caller.isExceptionalSmalltalkContext()) { |
18412 | 2221 |
caller = lastCallee.sender(); // exposed |
18253 | 2222 |
return context._RETURN(caller); |
2223 |
} |
|
18412 | 2224 |
lastCallee = caller; |
2225 |
caller = lastCallee.caller; |
|
18253 | 2226 |
} |
2227 |
return context._RETURN( STObject.Nil ); |
|
2228 |
} |
|
2229 |
/* NOTREACHED */ |
|
18190 | 2230 |
#else |
8284 | 2231 |
OBJ theContext; |
2232 |
||
2233 |
theContext = self; |
|
2234 |
while (__isNonNilObject(theContext)) { |
|
15933 | 2235 |
if ((INT)(__ContextInstPtr(theContext)->c_flags) & __MASKSMALLINT(__HANDLE_MARK|__RAISE_MARK)) { |
2236 |
if (__isLazy(theContext)) { |
|
2237 |
__PATCHUPCONTEXT(theContext); |
|
2238 |
} |
|
2239 |
||
2240 |
if (! __isNonLIFO(theContext)) { |
|
2241 |
/* |
|
2242 |
* to be prepared for the worst situation |
|
2243 |
* (the sender is not stored, so the trap won't catch it) |
|
2244 |
* make the writeBarrier trigger manually. |
|
2245 |
* We'll see, if this is really required. |
|
2246 |
*/ |
|
2247 |
theContext->o_space |= CATCHMARK; |
|
18190 | 2248 |
# if 0 |
15933 | 2249 |
__markNonLIFO(theContext); |
18190 | 2250 |
# endif |
15933 | 2251 |
} |
2252 |
RETURN (theContext); |
|
2253 |
} |
|
2254 |
theContext = __ContextInstPtr(theContext)->c_sender; |
|
8284 | 2255 |
} |
18253 | 2256 |
#endif /* not SCHTEAM */ |
8284 | 2257 |
%}. |
2258 |
^ nil |
|
2259 |
! |
|
2260 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2261 |
findNextContextWithSelector:selector1 or:selector2 or:selector3 |
12841 | 2262 |
"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
|
2263 |
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
|
2264 |
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
|
2265 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2266 |
"/ 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
|
2267 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2268 |
"/ |con| |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2269 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2270 |
"/ con := self sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2271 |
"/ [con notNil] whileTrue:[ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2272 |
"/ 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
|
2273 |
"/ con := con sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2274 |
"/ ]. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2275 |
"/ ^ nil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2276 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2277 |
"/ 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
|
2278 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2279 |
"/ (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
|
2280 |
"/ 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
|
2281 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2282 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2283 |
#ifdef __SCHTEAM__ |
18216 | 2284 |
{ |
18412 | 2285 |
STContinuation lastCallee = (STContinuation)self; |
2286 |
STContinuation cont = lastCallee.caller; |
|
2287 |
||
18216 | 2288 |
STObject sel1 = context.stArg(0); |
2289 |
STObject sel2 = context.stArg(1); |
|
2290 |
STObject sel3 = context.stArg(2); |
|
2291 |
||
18406 | 2292 |
while (cont != null) { |
2293 |
if (cont.isSmalltalkContext()) { |
|
2294 |
STObject thisSelector = cont.contextSelector(); |
|
18216 | 2295 |
|
2296 |
if ((thisSelector == sel1) |
|
2297 |
|| (thisSelector == sel2) |
|
2298 |
|| (thisSelector == sel3)) { |
|
2299 |
break; |
|
2300 |
} |
|
2301 |
} |
|
18412 | 2302 |
lastCallee = cont; |
2303 |
cont = lastCallee.caller; |
|
18216 | 2304 |
} |
18406 | 2305 |
if (cont == null) { |
2306 |
return __c__._RETURN_nil(); |
|
2307 |
} |
|
18412 | 2308 |
cont = lastCallee.sender(); // exposed |
18406 | 2309 |
return __c__._RETURN(cont); |
18216 | 2310 |
} |
2311 |
/* NOTREACHED */ |
|
18190 | 2312 |
#else |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2313 |
OBJ theContext; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2314 |
OBJ sel; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2315 |
OBJ __FETCHSELECTOR(); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2316 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2317 |
theContext = __INST(sender_); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2318 |
while (__isNonNilObject(theContext)) { |
15933 | 2319 |
if (__isLazy(theContext)) { |
18190 | 2320 |
# ifdef TRADITIONAL_STACK_FRAME |
15933 | 2321 |
sel = __FETCHSELECTOR(theContext); |
18190 | 2322 |
# else |
15933 | 2323 |
/* mhmh - not really needed */ |
2324 |
__PATCHUPCONTEXT(theContext); |
|
2325 |
sel = __ContextInstPtr(theContext)->c_selector; |
|
18190 | 2326 |
# endif |
15933 | 2327 |
} else { |
2328 |
sel = __ContextInstPtr(theContext)->c_selector; |
|
2329 |
} |
|
2330 |
||
2331 |
if ((sel == selector1) |
|
2332 |
|| ((selector2 != nil) && (sel == selector2)) |
|
2333 |
|| ((selector3 != nil) && (sel == selector3))) { |
|
2334 |
if (__isLazy(theContext)) { |
|
2335 |
__PATCHUPCONTEXT(theContext); |
|
2336 |
} |
|
2337 |
||
2338 |
if (! __isNonLIFO(theContext)) { |
|
2339 |
/* |
|
2340 |
* to be prepared for the worst situation |
|
2341 |
* (the sender is not stored, so the trap won't catch it) |
|
2342 |
* make the writeBarrier trigger manually. |
|
2343 |
* We'll see, if this is really required. |
|
2344 |
*/ |
|
2345 |
theContext->o_space |= CATCHMARK; |
|
2346 |
__markNonLIFO(theContext); |
|
2347 |
} |
|
2348 |
RETURN (theContext); |
|
2349 |
} |
|
2350 |
theContext = __ContextInstPtr(theContext)->c_sender; |
|
5422 | 2351 |
} |
2352 |
RETURN (nil); |
|
18190 | 2353 |
#endif |
5422 | 2354 |
%}. |
2355 |
" |
|
2356 |
|con sel| |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2357 |
|
5422 | 2358 |
con := self sender. |
2359 |
[con notNil] whileTrue:[ |
|
15933 | 2360 |
sel := con selector. |
2361 |
sel == selector1 ifTrue:[^ con]. |
|
2362 |
(selector2 notNil and:[sel == selector2]) ifTrue:[^ con]. |
|
2363 |
(selector3 notNil and:[sel == selector3]) ifTrue:[^ con]. |
|
2364 |
con := con sender. |
|
5422 | 2365 |
]. |
2366 |
^ nil |
|
2367 |
" |
|
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2368 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2369 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2370 |
findNextUnwindContextOr:aContext |
12841 | 2371 |
"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
|
2372 |
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
|
2373 |
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
|
2374 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2375 |
"/ 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
|
2376 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2377 |
"/ |con| |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2378 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2379 |
"/ con := self sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2380 |
"/ [con notNil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2381 |
"/ and:[con ~~ aContext |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2382 |
"/ 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
|
2383 |
"/ ^ con |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2384 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2385 |
"/ 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
|
2386 |
"/ (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
|
2387 |
"/ 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
|
2388 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2389 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2390 |
#ifdef __SCHTEAM__ |
18408 | 2391 |
{ |
2392 |
if (self == aContext) { |
|
2393 |
return __c__._RETURN(self); |
|
2394 |
} |
|
2395 |
||
18412 | 2396 |
STContinuation lastCallee = (STContinuation)self; |
2397 |
STContinuation theContext = lastCallee.caller; |
|
18408 | 2398 |
|
2399 |
while (theContext != null) { |
|
2400 |
if ((theContext == aContext) |
|
2401 |
|| theContext.isMarkedForUnwind()) { |
|
18412 | 2402 |
theContext = lastCallee.sender(); // exposed |
18408 | 2403 |
return __c__._RETURN(theContext); |
2404 |
} |
|
18412 | 2405 |
lastCallee = theContext; |
2406 |
theContext = lastCallee.caller; |
|
18408 | 2407 |
} |
2408 |
} |
|
18190 | 2409 |
#else |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2410 |
OBJ theContext; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2411 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2412 |
if (self == aContext) { |
15933 | 2413 |
RETURN (self); |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2414 |
} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2415 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2416 |
theContext = __INST(sender_); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2417 |
while (__isNonNilObject(theContext)) { |
15933 | 2418 |
if ((theContext == aContext) |
2419 |
|| ((INT)(__ContextInstPtr(theContext)->c_flags) & __MASKSMALLINT(__UNWIND_MARK))) { |
|
2420 |
if (__isLazy(theContext)) { |
|
2421 |
__PATCHUPCONTEXT(theContext); |
|
2422 |
} |
|
2423 |
if (! __isNonLIFO(theContext)) { |
|
2424 |
/* |
|
2425 |
* to be prepared for the worst situation |
|
2426 |
* (the sender is not stored, so the trap won't catch it) |
|
2427 |
* make the writeBarrier trigger manually. |
|
2428 |
* We'll see, if this is really required. |
|
2429 |
*/ |
|
2430 |
theContext->o_space |= CATCHMARK; |
|
18190 | 2431 |
# if 0 |
15933 | 2432 |
__markNonLIFO(theContext); |
18190 | 2433 |
# endif |
15933 | 2434 |
} |
2435 |
RETURN (theContext); |
|
2436 |
} |
|
2437 |
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
|
2438 |
} |
18190 | 2439 |
#endif |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2440 |
%}. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2441 |
^ nil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2442 |
! |
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 |
findSpecialHandle:findHandleContext raise:findRaiseContext |
12841 | 2445 |
"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
|
2446 |
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
|
2447 |
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
|
2448 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2449 |
"/ 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
|
2450 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2451 |
"/ |con| |
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 |
"/ con := self sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2454 |
"/ [con notNil] whileTrue:[ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2455 |
"/ (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
|
2456 |
"/ (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
|
2457 |
"/ con := con sender. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2458 |
"/ ]. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2459 |
"/ ^ nil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2460 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2461 |
"/ 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
|
2462 |
"/ |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2463 |
"/ (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
|
2464 |
"/ 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
|
2465 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2466 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2467 |
#ifdef __SCHTEAM__ |
18406 | 2468 |
{ |
18412 | 2469 |
STContinuation lastCallee = (STContinuation)self; |
2470 |
STContinuation theContext = lastCallee.caller; |
|
2471 |
||
18406 | 2472 |
while (theContext != null) { |
2473 |
if (theContext.isMarkedSpecial()) { |
|
2474 |
if ((findHandleContext == STObject.True) |
|
2475 |
&& theContext.isMarkedForHandle()) { |
|
18412 | 2476 |
theContext = lastCallee.sender(); // exposed |
18406 | 2477 |
return __c__._RETURN(theContext); |
2478 |
} |
|
2479 |
if ((findRaiseContext == STObject.True) |
|
2480 |
&& theContext.isMarkedForRaise()) { |
|
18412 | 2481 |
theContext = lastCallee.sender(); // exposed |
18406 | 2482 |
return __c__._RETURN(theContext); |
2483 |
} |
|
2484 |
} |
|
18412 | 2485 |
lastCallee = theContext; |
2486 |
theContext = lastCallee.caller; |
|
18406 | 2487 |
} |
2488 |
} |
|
18190 | 2489 |
#else |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2490 |
OBJ theContext; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2491 |
int flagMask = 0; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2492 |
INT mask; |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2493 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2494 |
if (findHandleContext == true) |
15933 | 2495 |
flagMask = __HANDLE_MARK; |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2496 |
if (findRaiseContext == true) |
15933 | 2497 |
flagMask |= __RAISE_MARK; |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2498 |
|
12841 | 2499 |
mask = __MASKSMALLINT(flagMask); |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2500 |
theContext = __INST(sender_); |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2501 |
while (__isNonNilObject(theContext)) { |
15933 | 2502 |
if ((INT)(__ContextInstPtr(theContext)->c_flags) & mask) { |
2503 |
if (__isLazy(theContext)) { |
|
2504 |
__PATCHUPCONTEXT(theContext); |
|
2505 |
} |
|
2506 |
||
2507 |
if (! __isNonLIFO(theContext)) { |
|
2508 |
/* |
|
2509 |
* to be prepared for the worst situation |
|
2510 |
* (the sender is not stored, so the trap won't catch it) |
|
2511 |
* make the writeBarrier trigger manually. |
|
2512 |
* We'll see, if this is really required. |
|
2513 |
*/ |
|
2514 |
theContext->o_space |= CATCHMARK; |
|
18190 | 2515 |
# if 0 |
15933 | 2516 |
__markNonLIFO(theContext); |
18190 | 2517 |
# endif |
15933 | 2518 |
} |
2519 |
RETURN (theContext); |
|
2520 |
} |
|
2521 |
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
|
2522 |
} |
18190 | 2523 |
#endif |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2524 |
%}. |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2525 |
^ nil |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2526 |
! ! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2527 |
|
1051 | 2528 |
!Context methodsFor:'special accessing'! |
2529 |
||
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2530 |
argAndVarNames |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2531 |
"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
|
2532 |
|
15644 | 2533 |
|homeContext homeMethod block numArgs numVars m src |
8217 | 2534 |
sel isDoIt blocksLineNr extractFromBlock sender| |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2535 |
|
18437 | 2536 |
numArgs := self argumentCount. |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2537 |
numVars := self numVars. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2538 |
(numArgs == 0 and:[numVars == 0]) ifTrue:[^ #()]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2539 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2540 |
homeContext := self methodHome. |
7652 | 2541 |
homeContext notNil ifTrue:[ |
18437 | 2542 |
sel := homeContext selector. |
2543 |
homeMethod := homeContext method. |
|
7652 | 2544 |
]. |
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2545 |
|
12841 | 2546 |
extractFromBlock := |
18437 | 2547 |
[ |
2548 |
|blockNode argNames varNames vars args blocksHome| |
|
2549 |
||
2550 |
blockNode := Compiler |
|
2551 |
blockAtLine:blocksLineNr |
|
2552 |
in:m |
|
2553 |
orSource:src |
|
2554 |
numArgs:numArgs |
|
2555 |
numVars:numVars. |
|
2556 |
||
2557 |
blockNode notNil ifTrue:[ |
|
2558 |
"/ a kludge |
|
2559 |
blockNode lineNumber == blocksLineNr ifTrue:[ |
|
2560 |
blocksHome := blockNode home. |
|
2561 |
(blocksHome notNil and:[blocksHome isBlock]) ifTrue:[ |
|
2562 |
(blocksHome numArgs == numArgs |
|
2563 |
and:[ blocksHome numVars == numVars ]) ifTrue:[ |
|
2564 |
blockNode := blocksHome |
|
2565 |
]. |
|
2566 |
]. |
|
2567 |
]. |
|
2568 |
||
2569 |
argNames := #(). |
|
2570 |
varNames := #(). |
|
2571 |
||
2572 |
numArgs > 0 ifTrue:[ |
|
2573 |
vars := blockNode arguments. |
|
2574 |
vars notEmptyOrNil ifTrue:[ |
|
2575 |
argNames := vars collect:[:var | var name] |
|
2576 |
] |
|
2577 |
]. |
|
2578 |
numVars > 0 ifTrue:[ |
|
2579 |
vars := blockNode variablesIncludingInlined: (homeMethod code notNil and:[homeMethod byteCode isNil]). |
|
2580 |
vars notEmptyOrNil ifTrue:[ |
|
2581 |
varNames := vars collect:[:var | var name]. |
|
2582 |
] |
|
2583 |
]. |
|
2584 |
^ argNames , varNames |
|
2585 |
]. |
|
2586 |
]. |
|
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2587 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2588 |
"/ #doIt needs special handling below |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2589 |
isDoIt := (sel == #'doIt') or:[sel == #'doIt:']. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2590 |
self isBlockContext ifFalse:[ |
18437 | 2591 |
isDoIt ifTrue:[ |
2592 |
homeMethod notNil ifTrue:[ |
|
2593 |
"/ special for #doIt |
|
2594 |
m := nil. |
|
2595 |
src := ('[' , homeMethod source , '\]') withCRs. |
|
2596 |
"/ blocksLineNr := self lineNumber. |
|
2597 |
blocksLineNr := (self home ? self) lineNumber. |
|
2598 |
extractFromBlock value. |
|
2599 |
] |
|
2600 |
]. |
|
2601 |
||
2602 |
homeMethod notNil ifTrue:[ |
|
2603 |
^ homeMethod methodArgAndVarNamesInContext: self. |
|
2604 |
]. |
|
2605 |
^ #() |
|
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2606 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2607 |
|
15644 | 2608 |
homeMethod notNil ifTrue:[ |
18437 | 2609 |
isDoIt ifTrue:[ |
2610 |
"/ special for #doIt |
|
2611 |
"/ my source is found in the method. |
|
2612 |
m := nil. |
|
2613 |
src := ('[' , homeMethod source , '\]') withCRs. |
|
2614 |
] ifFalse:[ |
|
2615 |
m := homeMethod. |
|
2616 |
src := nil. |
|
2617 |
]. |
|
2618 |
blocksLineNr := self lineNumber. |
|
2619 |
extractFromBlock value. |
|
2620 |
blocksLineNr := self home lineNumber. |
|
2621 |
extractFromBlock value. |
|
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2622 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2623 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2624 |
blocksLineNr isNil ifTrue:[ |
18437 | 2625 |
self isBlockContext ifTrue:[ |
2626 |
sender := self sender. |
|
2627 |
(sender notNil |
|
2628 |
and:[sender receiver isBlock |
|
2629 |
and:[sender selector startsWith:'value']]) |
|
2630 |
ifTrue:[ |
|
2631 |
block := sender receiver. |
|
2632 |
src := block source. |
|
2633 |
src isNil ifTrue:[ |
|
2634 |
self error:'no source'. |
|
2635 |
]. |
|
2636 |
blocksLineNr := 1. |
|
2637 |
extractFromBlock value. |
|
2638 |
]. |
|
2639 |
sender := nil. |
|
2640 |
]. |
|
7568
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2641 |
]. |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2642 |
|
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2643 |
^ #() |
15644 | 2644 |
|
2645 |
"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
|
2646 |
! |
1dc12a1080b0
** changed access to blockContexts args and vars -- please watch out
penk
parents:
7324
diff
changeset
|
2647 |
|
4557 | 2648 |
canResume |
2649 |
"return true, if the receiver allows to be resumed. |
|
18412 | 2650 |
In ST/X, due to the implementation, this requires that the context which |
2651 |
is right below the receiver is returnable and still active." |
|
4557 | 2652 |
|
2653 |
|theContext| |
|
2654 |
||
2655 |
" |
|
2656 |
starting with this context, find the one below |
|
2657 |
(i.e. the one that I have called) and return from it. |
|
2658 |
" |
|
2659 |
%{ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2660 |
#ifdef __SCHTEAM__ |
18412 | 2661 |
// in the SCHTEAM-engine, all contexts are resumable |
18289 | 2662 |
return context._RETURN_true(); |
18190 | 2663 |
#else |
4557 | 2664 |
OBJ sndr; |
2665 |
||
2666 |
theContext = __thisContext; |
|
2667 |
while (theContext != nil) { |
|
15933 | 2668 |
sndr = __ContextInstPtr(theContext)->c_sender; |
2669 |
if (sndr == self) break; |
|
2670 |
theContext = sndr; |
|
4557 | 2671 |
} |
2672 |
if (theContext != nil) { |
|
15933 | 2673 |
if (__isLazy(theContext)) { |
2674 |
__PATCHUPCONTEXT(theContext); |
|
2675 |
} |
|
4557 | 2676 |
} |
18190 | 2677 |
#endif |
4557 | 2678 |
%}. |
2679 |
theContext isNil ifTrue:[ |
|
15933 | 2680 |
^ false |
4557 | 2681 |
]. |
2682 |
^ theContext canReturn |
|
2683 |
! |
|
2684 |
||
1051 | 2685 |
canReturn |
2686 |
"return true, if the receiver allows returning through it. |
|
4557 | 2687 |
Blocks, (currently) always return false. |
2646 | 2688 |
Methods which contain a (non-inlined) block are always |
2689 |
returnable - for other methods, it depends on how the system |
|
2690 |
was compiled (stc flag +/-optContext). |
|
2691 |
If it was compiled with +optContext, methods are compiled |
|
4557 | 2692 |
non returnable, unless a return-pragma was present in the method. |
2646 | 2693 |
Since this saves some administrative work in every method |
2694 |
invocation and makes overall execution faster, the system classes |
|
18412 | 2695 |
are all compiled with this flag turned on. |
2696 |
This means, that by default, it is not possible to walk up the |
|
2697 |
calling chain and return to an arbitrary context. |
|
2698 |
For contexts which are known to require this (i.e. handlers as found |
|
2699 |
by the exception walkers, these are marked specially (markForReturn), |
|
2700 |
so compilers know that they should create full featured contexts." |
|
1051 | 2701 |
|
2702 |
%{ /* NOCONTEXT */ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2703 |
#ifdef __SCHTEAM__ |
18412 | 2704 |
// in the SCHTEAM-engine, all contexts can be returned from |
18289 | 2705 |
return context._RETURN_true(); |
18190 | 2706 |
#else |
3508 | 2707 |
RETURN ( ((INT)(__INST(flags)) & __MASKSMALLINT(__CANNOT_RETURN)) ? false : true ); |
18190 | 2708 |
#endif |
5441 | 2709 |
%}. |
2710 |
^ true |
|
1051 | 2711 |
! |
2712 |
||
1492 | 2713 |
hasStackToShow |
2646 | 2714 |
"private interface to the debugger. |
2715 |
Smalltalk contexts return false here - other language frames |
|
2716 |
(i.e. Java frames) may want to show the evaluation stack" |
|
2717 |
||
1492 | 2718 |
^ false |
2719 |
||
2720 |
"Created: 28.6.1996 / 14:48:39 / cg" |
|
2646 | 2721 |
"Modified: 13.5.1997 / 16:31:12 / cg" |
1492 | 2722 |
! |
2723 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2724 |
isHandleContext |
4505 | 2725 |
"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
|
2726 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2727 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2728 |
#ifdef __SCHTEAM__ |
18412 | 2729 |
return __c__._RETURN ( ((STContinuation)self).isMarkedForHandle() ); |
18190 | 2730 |
#else |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2731 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__HANDLE_MARK)) ? true : false ); |
18190 | 2732 |
#endif |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2733 |
%} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2734 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2735 |
|
1051 | 2736 |
isNonLifo |
2646 | 2737 |
"return true, if this is a nonLifo context. |
2738 |
A nonLifo context is one that is still on the machine stack, |
|
2739 |
but has a reference taken and needs to be converted to a real |
|
2740 |
object (in objectMemory) when the method/block returns. |
|
18412 | 2741 |
You don't have to understand this - this is a special ST/X |
2646 | 2742 |
debug query, which may be removed without notice." |
1051 | 2743 |
|
2744 |
%{ /* NOCONTEXT */ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2745 |
#ifdef __SCHTEAM__ |
18412 | 2746 |
return __c__._RETURN ( ((STContinuation)self).isNonLifo() ); |
18190 | 2747 |
#else |
1133 | 2748 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__NONLIFO)) ? true : false ); |
18190 | 2749 |
#endif |
1051 | 2750 |
%} |
2751 |
! |
|
2752 |
||
2753 |
isOnMachineStack |
|
12841 | 2754 |
"return true, if this is a machine stack context as opposed to a |
18412 | 2755 |
real heap context (i.e. if it has not been captured and returned from). |
2756 |
You don't have to understand this - this is a special ST/X |
|
2646 | 2757 |
debug query, which may be removed without notice." |
1051 | 2758 |
|
2759 |
%{ /* NOCONTEXT */ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2760 |
#ifdef __SCHTEAM__ |
18412 | 2761 |
return __c__._RETURN ( ! ((STContinuation)self).isCopiedToHeap() ); |
18190 | 2762 |
#else |
18412 | 2763 |
RETURN ( (__qSpace(self) >= STACKSPACE) ? true : false ); |
18190 | 2764 |
#endif |
1051 | 2765 |
%} |
2766 |
! |
|
2767 |
||
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2768 |
isRaiseContext |
4505 | 2769 |
"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
|
2770 |
|
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2771 |
%{ /* NOCONTEXT */ |
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2772 |
#ifdef __SCHTEAM__ |
18412 | 2773 |
return __c__._RETURN ( ((STContinuation)self).isMarkedForRaise() ); |
18190 | 2774 |
#else |
18412 | 2775 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__RAISE_MARK)) ? true : false ); |
18190 | 2776 |
#endif |
4464
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2777 |
%} |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2778 |
! |
cec93c942c14
Use context flag for exception handling instead of searching for
Stefan Vogel <sv@exept.de>
parents:
4450
diff
changeset
|
2779 |
|
1051 | 2780 |
isSpecial |
2781 |
"return true, if this is either a nonLifo or interrupted context" |
|
2782 |
||
2783 |
%{ /* NOCONTEXT */ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2784 |
#ifdef __SCHTEAM__ |
18412 | 2785 |
return __c__._RETURN ( ((STContinuation)self).isMarkedSpecial() ); |
18190 | 2786 |
#else |
18412 | 2787 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__SPECIAL)) ? true : false ); |
18190 | 2788 |
#endif |
1051 | 2789 |
%} |
2790 |
! |
|
2791 |
||
2792 |
isUnwindContext |
|
2793 |
"return true, if this is an unwindContext" |
|
2794 |
||
2795 |
%{ /* NOCONTEXT */ |
|
18240
28af09029a8b
ifdef for SCHTEAM engine changed (not relevant for ST/X)
Claus Gittinger <cg@exept.de>
parents:
18216
diff
changeset
|
2796 |
#ifdef __SCHTEAM__ |
18412 | 2797 |
return __c__._RETURN ( ((STContinuation)self).isMarkedForUnwind() ); |
18190 | 2798 |
#else |
18412 | 2799 |
RETURN ( ((INT)__INST(flags) & __MASKSMALLINT(__UNWIND_MARK)) ? true : false ); |
18190 | 2800 |
#endif |
1051 | 2801 |
%} |
8578 | 2802 |
! |
2803 |
||
2804 |
tempNames |
|
2805 |
"helper: given a context, return a collection of arg, var and temporary names" |
|
2806 |
||
2807 |
|names nTemps| |
|
2808 |
||
2809 |
names := self argAndVarNames. |
|
2810 |
(nTemps := self numTemps) > 0 ifTrue:[ |
|
15933 | 2811 |
^ names , ((1 to:nTemps) collect:[:idx | '_tmp' , idx printString]). |
8578 | 2812 |
]. |
2813 |
^ names. |
|
1051 | 2814 |
! ! |
2815 |
||
623 | 2816 |
!Context methodsFor:'testing'! |
2817 |
||
2818 |
isBlockContext |
|
2819 |
"return true, iff the receiver is a BlockContext, false otherwise" |
|
2820 |
||
2821 |
^ false |
|
2822 |
! |
|
2823 |
||
14214 | 2824 |
isCheapBlockContext |
2825 |
"return true, iff the receiver is a BlockContext, for a cheap block, false otherwise. |
|
2826 |
Cheap blocks do not refer to their home" |
|
2827 |
||
2828 |
^ false |
|
2829 |
||
2830 |
"Created: / 19-07-2012 / 11:22:38 / cg" |
|
2831 |
! |
|
2832 |
||
623 | 2833 |
isContext |
2834 |
"return true, iff the receiver is a Context, false otherwise" |
|
2835 |
||
2836 |
^ true |
|
2837 |
! |
|
2838 |
||
16078 | 2839 |
isReallyRecursive |
2840 |
"return true, if this context is one of a recursive send of the same |
|
2841 |
selector AND same argument(s) to the same receiver before. |
|
2842 |
Here, different arguments are NOT ignored" |
|
2843 |
||
2844 |
|c count "{Class: SmallInteger }" sameArgs| |
|
2845 |
||
2846 |
count := 0. |
|
2847 |
||
2848 |
c := self findNextContextWithSelector:selector or:nil or:nil. |
|
2849 |
[c notNil] whileTrue:[ |
|
18437 | 2850 |
(c receiver == receiver) ifTrue:[ |
2851 |
c method == self method ifTrue:[ |
|
2852 |
sameArgs := true. |
|
2853 |
1 to:self argumentCount do:[:i | |
|
2854 |
(c argAt:1) ~~ (self argAt:i)ifTrue:[ |
|
2855 |
sameArgs := false |
|
2856 |
] |
|
2857 |
]. |
|
2858 |
sameArgs ifTrue:[^ true]. |
|
2859 |
] |
|
2860 |
]. |
|
2861 |
c := c findNextContextWithSelector:selector or:nil or:nil. |
|
2862 |
||
2863 |
" |
|
2864 |
this special test was added to get out after a while |
|
2865 |
if the sender chain is corrupt - this gives us at least |
|
2866 |
a chance to find those errors. |
|
2867 |
" |
|
2868 |
count := count + 1. |
|
2869 |
count >= 100000 ifTrue:[ |
|
2870 |
'Context [warning]: bad context chain' errorPrintCR. |
|
2871 |
^ true |
|
2872 |
] |
|
16078 | 2873 |
]. |
2874 |
^ false |
|
2875 |
! |
|
2876 |
||
623 | 2877 |
isRecursive |
2878 |
"return true, if this context is one of a recursive send of the same |
|
1483 | 2879 |
selector to the same receiver before. |
2880 |
Here, different arguments are ignored - i.e. only the same method |
|
2881 |
counts for recursiveness. |
|
623 | 2882 |
Used to detect recursive errors or recursive printing - for example." |
2883 |
||
16078 | 2884 |
|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
|
2885 |
|
af7652b82404
avoid touching contexts (making them nonLifo) when searching for unwind-contexts,
Claus Gittinger <cg@exept.de>
parents:
2285
diff
changeset
|
2886 |
count := 0. |
af7652b82404
avoid touching contexts (making them nonLifo) when searching for unwind-contexts,
Claus Gittinger <cg@exept.de>
parents:
2285
diff
changeset
|
2887 |
|
2893 | 2888 |
c := self findNextContextWithSelector:selector or:nil or:nil. |
623 | 2889 |
[c notNil] whileTrue:[ |
18190 | 2890 |
(c receiver == receiver) ifTrue:[ |
16077 | 2891 |
"/ " |
2892 |
"/ stupid: the current ST/X context does not include |
|
2893 |
"/ the method, but the class, in which the search started ... |
|
2894 |
"/ " |
|
2895 |
"/ myMethodsClass isNil ifTrue:[ |
|
2896 |
"/ myMethodsClass := self methodClass. |
|
2897 |
"/ ]. |
|
2898 |
"/ c methodClass == myMethodsClass ifTrue:[ |
|
2899 |
"/ ^ true |
|
2900 |
"/ ]. |
|
18190 | 2901 |
"/ now it does!! |
2902 |
c method == self method ifTrue:[^ true]. |
|
2903 |
]. |
|
2904 |
c := c findNextContextWithSelector:selector or:nil or:nil. |
|
2905 |
||
2906 |
" |
|
2907 |
this special test was added to get out after a while |
|
2908 |
if the sender chain is corrupt - this gives us at least |
|
2909 |
a chance to find those errors. |
|
2910 |
" |
|
2911 |
count := count + 1. |
|
2912 |
count >= 100000 ifTrue:[ |
|
2913 |
'Context [warning]: bad context chain' errorPrintCR. |
|
2914 |
^ true |
|
2915 |
] |
|
623 | 2916 |
]. |
2917 |
^ false |
|
1483 | 2918 |
|
2135
6bd144c1c358
newStyle info & error messages
Claus Gittinger <cg@exept.de>
parents:
1853
diff
changeset
|
2919 |
"Modified: 10.1.1997 / 17:34:26 / cg" |
623 | 2920 |
! ! |
2921 |
||
1810 | 2922 |
!Context class methodsFor:'documentation'! |
749 | 2923 |
|
14418
6558e5c3b32e
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
14413
diff
changeset
|
2924 |
version |
18437 | 2925 |
^ '$Header: /cvs/stx/stx/libbasic/Context.st,v 1.225 2015-06-05 16:09:48 stefan Exp $' |
14418
6558e5c3b32e
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
14413
diff
changeset
|
2926 |
! |
6558e5c3b32e
changed: #receiverPrintString
Claus Gittinger <cg@exept.de>
parents:
14413
diff
changeset
|
2927 |
|
13426 | 2928 |
version_CVS |
18437 | 2929 |
^ '$Header: /cvs/stx/stx/libbasic/Context.st,v 1.225 2015-06-05 16:09:48 stefan Exp $' |
15644 | 2930 |
! |
2931 |
||
2932 |
version_HG |
|
2933 |
||
2934 |
^ '$Changeset: <not expanded> $' |
|
12573 | 2935 |
! |
2936 |
||
13426 | 2937 |
version_SVN |
15232 | 2938 |
^ '$ Id: Context.st 10643 2011-06-08 21:53:07Z vranyj1 $' |
749 | 2939 |
! ! |
7257 | 2940 |
|
14700 | 2941 |
|
623 | 2942 |
Context initialize! |