"
jv:libgdbs - GNU Debugger Interface Library
Copyright (C) 2015-now Jan Vrany

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License. 

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
"
"{ Package: 'jv:libgdbs' }"

"{ NameSpace: Smalltalk }"

GDBProcess subclass:#GDBLocalProcess
	instanceVariableNames:'command pid'
	classVariableNames:''
	poolDictionaries:''
	category:'GDB-Private'
!

!GDBLocalProcess class methodsFor:'documentation'!

copyright
"
jv:libgdbs - GNU Debugger Interface Library
Copyright (C) 2015-now Jan Vrany

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License. 

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
"
!

documentation
"
    GDBLocalProcess is a specialization of GDBProcess that spawns a
    local GDB process on a host machine. Spawning a running of GDB
    process is ully managed by an (sub)instance of `GDBLocalProcess`
    Due to platform differences, there are concrete variants for 
    different platforms.

    [author:]
        Jan Vrany <jan.vrany@fit.cvut.cz>

    [instance variables:]

    [class variables:]

    [see also:]
        GDBStXUnixProcess
        GDBStXWindowsProcess
        GDBRemoteProcess

"
! !

!GDBLocalProcess class methodsFor:'instance creation'!

newWithCommand: command
    "Return a new local GDBLocalProcess suitable for this platform 
     using `command` to launch GDB.

     If `command` is nil, default configured command is used
     (See GDBProcess class >> gdbExecutable)
    "
    self == GDBLocalProcess ifTrue:[
        Smalltalk isSmalltalkX ifTrue:[
            OperatingSystem isUNIXlike ifTrue:[
                ^ GDBStXUnixProcess basicNew initializeWithCommand: command
            ].
            ^ GDBStXSimpleProcess basicNew initializeWithCommand: command
        ].
    ].
    ^ self basicNew initializeWithCommand: command


    "
     GDBProcess new release."

    "Created: / 12-12-2018 / 22:19:50 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !

!GDBLocalProcess methodsFor:'accessing'!

command
    ^ command

    "Created: / 27-03-2019 / 09:46:54 / Jan Vrany <jan.vrany@fit.cvut.cz>"
!

id
    "Return a string identification of this GDBProcess. 
     Used for debugging purposes only."

    ^ pid

    "Created: / 19-10-2018 / 10:09:02 / Jan Vrany <jan.vrany@fit.cvut.cz>"
    "Modified: / 20-10-2018 / 06:53:36 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !

!GDBLocalProcess methodsFor:'initialization & release'!

initialize
    "Initializes itself using default gdb command"

    self initializeWithCommand: nil

    "Created: / 12-12-2018 / 20:11:53 / Jan Vrany <jan.vrany@fit.cvut.cz>"
    "Modified: / 12-12-2018 / 22:17:57 / Jan Vrany <jan.vrany@fit.cvut.cz>"
!

initializeWithCommand: aString
    "Initializes itself using  given command (`aString`) to launch GDB. 
     If `aString` is nil, default configured command is used
     (See GDBProcess class >> gdbExecutable)"

    self subclassResponsibility

    "Created: / 12-12-2018 / 20:11:06 / Jan Vrany <jan.vrany@fit.cvut.cz>"
    "Modified (comment): / 27-03-2019 / 08:31:45 / Jan Vrany <jan.vrany@fit.cvut.cz>"
!

release
    (pid notNil and:[pid > 1]) ifTrue:[
        OperatingSystem sendSignal:(OperatingSystem sigTERM) to: pid.       
    ].

    "Created: / 20-10-2018 / 07:12:01 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !

!GDBLocalProcess methodsFor:'private'!

command2argv: commandOrNil
    "Parse given `commandOrNil` string and return an array of tokens
     suitable for passing back to `exec()` family of functions.

     If `commandOrNil` is `nil`, then use default GDB command.
     On error, thrown GDBError.
    "

    | command argv exe |


    commandOrNil isNil ifTrue:[ 
        command := self class gdbCommand.
        command isEmptyOrNil ifTrue:[ 
            GDBError signal: 'GDB not found. Please set GDB command - `UserPreferences current gdbCommand:''...''`'.
            ^ nil.
        ].
    ] ifFalse:[ 
        command := commandOrNil.
        command isEmpty ifTrue:[ 
            GDBError signal: 'Command is empty'.
            ^ nil.
        ].
    ].
    argv := GDBShellCommandParser parse: command.
    exe := argv first.
    exe asFilename exists ifFalse:[ 
        "/ Try to find executable a long PATH, just as shell 
        "/ would do...
        exe := OperatingSystem pathOfCommand: exe.
        exe notNil ifTrue:[ 
            argv at:1 put: exe.
        ] ifFalse:[
            GDBError signal: 'Command not found: ', argv first.
            ^ nil
        ].
    ] ifTrue:[ 
        "/ `exe` points to real file (or directory...), so
        "/ check here...
        exe := exe asFilename.
        exe isExecutable ifTrue:[ 
            argv at:1 put: exe asAbsoluteFilename pathName.
        ] ifFalse:[ 
            GDBError signal: 'Command not executable: ', argv first.
            ^ nil
        ].
    ].
    ^ argv

    "Created: / 17-12-2018 / 10:48:30 / Jan Vrany <jan.vrany@fit.cvut.cz>"
!

exited: status
    "Called when spawn GDB process terminates for whatever reason"
    pid := nil.
    connection released: status

    "Created: / 20-06-2014 / 21:35:09 / Jan Vrany <jan.vrany@fit.cvut.cz>"
    "Modified: / 12-01-2018 / 21:50:50 / Jan Vrany <jan.vrany@fit.cvut.cz>"
    "Modified (comment): / 17-10-2018 / 22:30:34 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !

!GDBLocalProcess methodsFor:'testing'!

isLocal
    ^ true

    "Created: / 27-03-2019 / 09:23:27 / Jan Vrany <jan.vrany@fit.cvut.cz>"
! !