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"
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COPYRIGHT (c) 1988-93 by Claus Gittinger
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All Rights Reserved
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This software is furnished under a license and may be used
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only in accordance with the terms of that license and with the
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inclusion of the above copyright notice. This software may not
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be provided or otherwise made available to, or used by, any
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other person. No title to or ownership of the software is
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hereby transferred.
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"
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Object subclass:#MiniDebugger
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instanceVariableNames:'tracing stepping traceBlock'
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classVariableNames: 'theOneAndOnlyDebugger'
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poolDictionaries:''
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category:'System-Support'
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!
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MiniDebugger comment:'
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COPYRIGHT (c) 1988-93 by Claus Gittinger
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All Rights Reserved
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a primitive (non graphical) debugger for use on systems without
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graphics or when the real debugger dies (i.e. an error occurs in
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the graphical debugger).
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3
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$Header: /cvs/stx/stx/libbasic/Attic/MiniDebug.st,v 1.3 1993-10-13 00:16:37 claus Exp $
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'!
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!MiniDebugger class methodsFor: 'instance creation'!
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new
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theOneAndOnlyDebugger printNL.
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theOneAndOnlyDebugger isNil ifTrue:[
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theOneAndOnlyDebugger := self basicNew initialize
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].
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^ theOneAndOnlyDebugger
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!
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singleStep:aBlock
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|aDebugger|
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aDebugger := self new stepping.
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2
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ObjectMemory flushInlineCaches.
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ObjectMemory stepInterruptHandler:aDebugger.
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1
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StepInterruptPending := true.
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InterruptPending := true.
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aBlock value.
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2
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StepInterruptPending := nil.
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ObjectMemory stepInterruptHandler:nil
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1
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!
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trace:aBlock
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self trace:aBlock with:[:where | where printNewline]
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!
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trace:aBlock on:aStream
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self trace:aBlock with:[:where | where printString printOn:aStream.
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aStream cr]
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!
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trace:aBlock with:aTraceBlock
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|aDebugger|
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aDebugger := self new tracingWith:aTraceBlock.
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ObjectMemory flushInlineCaches.
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2
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ObjectMemory stepInterruptHandler:aDebugger.
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1
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StepInterruptPending := true.
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InterruptPending := true.
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aBlock value.
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2
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ObjectMemory stepInterruptHandler:nil.
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1
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StepInterruptPending := nil.
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^ nil
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!
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enterWithMessage:aString
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|aDebugger|
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StepInterruptPending := nil.
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aString printNewline.
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aDebugger := self new.
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aDebugger enter.
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^ nil
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! !
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!MiniDebugger methodsFor: 'initialization'!
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initialize
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traceBlock := nil.
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tracing := false.
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stepping := false
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! !
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!MiniDebugger methodsFor: 'private'!
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stepping
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traceBlock := nil.
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tracing := false.
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stepping := true
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!
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tracingWith:aBlockOrNil
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traceBlock := aBlockOrNil.
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stepping := false.
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tracing := true
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!
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getContext
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|backtrace|
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backtrace := thisContext.
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(backtrace notNil) ifTrue: [
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"remove Context getContext frame"
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backtrace := backtrace sender.
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"remove Debugger showContext frame"
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backtrace := backtrace sender.
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"remove Debugger commandLoop frame"
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backtrace := backtrace sender.
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"remove Debugger enter frame"
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backtrace := backtrace sender
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].
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^ backtrace
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! !
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!MiniDebugger methodsFor: 'interrupt handling'!
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stepInterrupt
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|where|
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where := thisContext. "where is stepInterrupt context"
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where notNil ifTrue:[
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where := where sender "where is now interrupted methods context"
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].
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stepping ifTrue:[
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where notNil ifTrue:[
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where fullPrint
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] ifFalse:[
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'stepInterrupt: no context' printNewline
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].
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self enter
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] ifFalse:[
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where notNil ifTrue:[
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traceBlock notNil ifTrue:[
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traceBlock value:where
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]
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] ifFalse:[
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'traceInterrupt: no context' printNewline
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].
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ObjectMemory flushInlineCaches.
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StepInterruptPending := true.
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InterruptPending := true
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]
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!
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enter
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|cmd|
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cmd := self commandLoop.
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(cmd == $s) ifTrue: [
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self stepping.
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ObjectMemory flushInlineCaches.
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2
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ObjectMemory stepInterruptHandler:self.
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StepInterruptPending := true.
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InterruptPending := true
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].
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(cmd == $t) ifTrue: [
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traceBlock := [:where | where fullPrint].
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ObjectMemory flushInlineCaches.
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ObjectMemory stepInterruptHandler:self.
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StepInterruptPending := true.
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InterruptPending := true
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].
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(cmd == $c) ifTrue: [
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stepping := false.
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tracing := false.
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StepInterruptPending := nil.
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InterruptPending := nil
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].
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^ nil
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! !
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!MiniDebugger methodsFor: 'user commands'!
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commandLoop
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|cmd done valid context|
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done := false.
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[done] whileFalse:[
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valid := false.
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cmd := self getCommand.
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(cmd == $p) ifTrue:[
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valid := true.
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context isNil ifTrue: [
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context := self getContext
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].
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context notNil ifTrue:[
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context fullPrintAll
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] ifFalse:[
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'no context' printNewline
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]
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].
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(cmd == $r) ifTrue:[
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valid := true.
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context isNil ifTrue: [
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context := self getContext
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].
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context notNil ifTrue:[
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"remove Debugger stepinterrupt/halt frame"
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context sender receiver printNewline
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] ifFalse:[
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'no context - dont know receiver' printNewline
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]
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].
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(cmd == $R) ifTrue:[
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valid := true.
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context isNil ifTrue: [
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context := self getContext
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].
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context notNil ifTrue:[
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"remove Debugger stepinterrupt/halt frame"
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context sender receiver storeOn:Stdout
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] ifFalse:[
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'no context - dont know receiver' printNewline
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]
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].
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(cmd == $i) ifTrue:[
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valid := true.
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context isNil ifTrue: [
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context := self getContext
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].
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context notNil ifTrue:[
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"remove Debugger stepinterrupt/halt frame"
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context sender receiver inspect
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] ifFalse:[
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'no context - dont know receiver' printNewline
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]
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].
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(cmd == $I) ifTrue:[
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valid := true.
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context isNil ifTrue: [
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context := self getContext
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].
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context notNil ifTrue:[
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"remove Debugger stepinterrupt/halt frame"
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self interpreterLoopWith:(context sender receiver)
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] ifFalse:[
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'no context - dont know receiver' printNewline.
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self interpreterLoopWith:nil
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]
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].
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context := nil.
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(cmd == $c) ifTrue:[valid := true. done := true].
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(cmd == $s) ifTrue:[valid := true. done := true].
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(cmd == $t) ifTrue:[valid := true. done := true].
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(cmd == $a) ifTrue:[Smalltalk fatalAbort].
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(cmd == $x) ifTrue:[Smalltalk exit].
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valid ifFalse: [
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'valid commands:' printNewline.
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' (c)ontinue' printNewline.
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' (s)tep' printNewline.
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' (t)race' printNewline.
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' (p)rintContext' printNewline.
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' (r)eceiver' printNewline.
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' (R)eceiver' printNewline.
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' (i)nspect' printNewline.
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' (I)nterpreter' printNewline.
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' (a)bort' printNewline.
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' (x)exit Smalltalk' printNewline
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]
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].
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^ cmd
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!
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getCommand
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|cmd c|
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'MiniDebugger> ' print.
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cmd := Character fromUser.
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c := cmd.
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[ c isEndOfLineCharacter ] whileFalse: [
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c := Character fromUser
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].
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^ cmd
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!
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interpreterLoopWith:anObject
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|line done|
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'read-eval-print loop; exit with empty line' printNewline.
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done := false.
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[done] whileFalse:[
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line := Stdin nextLine.
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(line size == 0) ifTrue:[
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done := true
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] ifFalse:[
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(Compiler evaluate:line
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receiver:anObject
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notifying:nil) printNewline
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]
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]
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! !
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