GDB.st
author Jan Vrany <jan.vrany@fit.cvut.cz>
Mon, 09 Jun 2014 10:28:46 +0100
changeset 10 f04a22c9b16c
parent 9 5cc8797f6523
child 11 474fbb650afe
permissions -rw-r--r--
Use special PTY for inferior input/output... ...so gdb control streams are not interleaved with inferior's input/output.
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"{ Package: 'jv:libgdbs' }"
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Object subclass:#GDB
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	instanceVariableNames:'driver commandSequenceNumber snapshotSequenceNumber'
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	classVariableNames:''
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	poolDictionaries:'GDBCommandStatus'
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	category:'GDB-Core'
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!
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!GDB class methodsFor:'instance creation'!
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new
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    "return an initialized instance"
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    ^ self basicNew initialize.
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! !
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!GDB methodsFor:'accessing'!
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announcer
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    ^ driver eventAnnouncer.
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    "Created: / 02-06-2014 / 23:06:20 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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!
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inferiorStderr
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    ^ driver inferiorOutput
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    "Created: / 09-06-2014 / 10:01:21 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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!
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inferiorStdin
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    ^ driver inferiorInput
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    "Created: / 09-06-2014 / 10:00:30 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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!
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inferiorStdout
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    ^ driver inferiorOutput
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    "Created: / 09-06-2014 / 10:01:16 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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! !
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!GDB methodsFor:'accessing-private'!
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nextCommandSequnceNumber
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    commandSequenceNumber := commandSequenceNumber + 1.
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    commandSequenceNumber == SmallInteger maxVal ifTrue:[ 
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        commandSequenceNumber := 0.
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    ].
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    ^ commandSequenceNumber
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    "Created: / 02-06-2014 / 23:48:19 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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!
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nextSnapshotSequnceNumber
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    snapshotSequenceNumber := snapshotSequenceNumber + 1.
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    snapshotSequenceNumber == SmallInteger maxVal ifTrue:[ 
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        snapshotSequenceNumber := 0.
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    ].
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    ^ snapshotSequenceNumber
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    "Created: / 02-06-2014 / 23:48:38 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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! !
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!GDB methodsFor:'commands'!
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send: aGDBCommand
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    ^ self send: aGDBCommand wait: true.
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    "Created: / 03-06-2014 / 00:10:38 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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!
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send: aGDBCommand wait: aBoolean
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    "Sends given command to GDB. If `aBoolean` is true, wait for
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     command to finish. Otherwise, return immediately."
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    | token blocker releaser |
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    token := self nextCommandSequnceNumber.
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    aGDBCommand token: token.
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    aBoolean ifTrue:[ 
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        releaser := [ :ev |
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                    ev token == token ifTrue:[ 
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                        self announcer unsubscribe: releaser.  
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                        blocker signal.
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                    ]].
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        blocker := Semaphore new.
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        self announcer when: GDBCommandResultEvent do: releaser.
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        driver pushEvent: (GDBCommandEvent new command: aGDBCommand).
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        blocker wait.
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    ] ifFalse:[
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        driver pushEvent: (GDBCommandEvent new command: aGDBCommand).
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    ]
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    "Created: / 02-06-2014 / 23:45:43 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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    "Modified: / 04-06-2014 / 09:32:20 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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! !
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!GDB methodsFor:'event handling'!
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onCommandResult: aGDBCommandResultEvent
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    aGDBCommandResultEvent result status == CommandStatusExit ifTrue:[ 
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        driver pushEvent: GDBExitEvent new.
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    ].
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    "Created: / 02-06-2014 / 23:40:18 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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    "Modified: / 04-06-2014 / 09:30:40 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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!
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onExit: aGDBExitEvent
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    self release.
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    "Created: / 03-06-2014 / 00:36:00 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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    "Modified: / 04-06-2014 / 09:28:59 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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! !
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!GDB methodsFor:'finalization'!
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finalize
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    self release.
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    "Created: / 26-05-2014 / 21:23:28 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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! !
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!GDB methodsFor:'initialize & release'!
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initialize
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    self registerForFinalization.
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    driver := GDBLauncher startGDB.
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    commandSequenceNumber := 0.
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    snapshotSequenceNumber := 0.
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    self announcer
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        when: GDBCommandResultEvent     send: #onCommandResult: to: self;
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        when: GDBExitEvent              send: #onExit: to: self.
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    driver eventPumpStart.
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    driver eventDispatchStart.
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    "Created: / 26-05-2014 / 21:23:04 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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    "Modified: / 03-06-2014 / 00:35:40 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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!
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release
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    driver notNil ifTrue:[ 
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        driver release.
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        driver := nil.
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    ].
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    "Created: / 26-05-2014 / 21:24:04 / Jan Vrany <jan.vrany@fit.cvut.cz>"
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! !
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!GDB class methodsFor:'documentation'!
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version_HG
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    ^ '$Changeset: <not expanded> $'
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! !
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