"

 COPYRIGHT (c) 1992 by Claus Gittinger

	      All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

StandardSystemView subclass:#MemoryUsageView

	instanceVariableNames:'rawInfo info list sortBlock'

	classVariableNames:''

	poolDictionaries:''

	category:'Interface-Tools'

!

copyright

"

 COPYRIGHT (c) 1992 by Claus Gittinger

	      All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

!

documentation

"

    this view shows an overview over the memory usage of the system.

    usage:

	MemoryUsageView new open

    Since scanning all memory takes some time, this is not done

    automatically, but upon request. See the middlebuttonmenu-'update'

    function.

"

! !

!MemoryUsageView methodsFor:'initialization'!

initialize

    |l helpView headLine|

    super initialize.

    self label:'Memory usage'.

    headLine := ' class                           # of insts  avg sz   max sz    bytes   %mem '.

    l := Label in:self.

    l origin:(0.0 @ 0.0) corner:(1.0 @ l height).

    l borderWidth:0.

    l label:headLine.

    l adjust:#left.

    self extent:((font widthOf:headLine) + (device horizontalPixelPerMillimeter * 15) rounded) @ self height.

    helpView := ScrollableView for:SelectionInListView in:self.

    helpView origin:(0.0 @ l height) corner:1.0 @ 1.0.

    list := helpView scrolledView.

    l origin:(list originRelativeTo:self) x @ 0.0.

    list font:(self font).

    l font:(self font).

    list menuHolder:self; menuPerformer:self; menuMessage:#usageMenu.

    "

     MemoryUsageView open

    "

! !

!MemoryUsageView methodsFor:'menu actions'!

inspectInstances

    |class|

    list selection notNil ifTrue:[

	class := (info at:(list selection)) at:1.

	"

	 special kludge

	"

	class == Class ifTrue:[^self].

	class == Metaclass ifTrue:[^self].

	self withCursor:(Cursor questionMark) do:[

	    |insts|

	    insts := class allInstances.

	    insts size > 500 ifTrue:[

		(self confirm:'there are ' , insts size printString , ' instances.\\Do you really want to see them all ?' withCRs)

		ifFalse:[^ self]

	    ].

	    insts inspect

	]

    ]

!

inspectOwners

    |class inspector|

    list selection notNil ifTrue:[

	class := (info at:(list selection)) at:1.

	"

	 special kludge

	"

	class == Class ifTrue:[^self].

	class == Metaclass ifTrue:[^self].

	self withCursor:(Cursor questionMark) do:[

	    |owners dict|

	    owners := (ObjectMemory whoReferencesInstancesOf:class).

	    owners isNil ifTrue:[

		self information:'no owners found - next GC should remove it'.

		^ self

	    ].

	    owners := owners asOrderedCollection.

	    owners size > 500 ifTrue:[

		(self confirm:'there are ' , owners size printString , ' owners.\\Do you really want to see them all ?' withCRs)

		ifFalse:[^ self]

	    ].

	    dict := IdentityDictionary new.

	    owners do:[:owner |

		|set names oClass s|

		"

		 skip weakArrays ... (they dont count)

		"

		(owner isMemberOf:WeakArray) ifFalse:[

		    set := Set new.

		    owner == Smalltalk ifTrue:[

			owner keysAndValuesDo:[:key :val |

			    (val isMemberOf:class) ifTrue:[

				set add:key

			    ]

			]

		    ] ifFalse:[

			names := owner class allInstVarNames.

			oClass := owner class.

			1 to:oClass instSize do:[:i |

			    ((owner instVarAt:i) isMemberOf:class) ifTrue:[

				set add:(names at:i).

			    ].

			].

			oClass isVariable ifTrue:[

			    oClass isPointers ifTrue:[

				1 to:owner basicSize do:[:i |

				    ((owner basicAt:i) isMemberOf:class) ifTrue:[

					set add:i

				    ]

				]

			    ]

			].

		    ].

		    "

		     put a describing string into the dictionary

		    "

		    s := 'references in: '.

		    set do:[:name | 

				name isString ifTrue:[

				    s := s , name , ' '

				] ifFalse:[

				    s := s , '[' , name printString , '] '

				]

			   ].

		    dict at:owner put:s.

"/                            dict at:owner put:set

		]

	    ].

	    inspector := DictionaryInspectorView openOn:dict.

	    inspector listView doubleClickAction:[:lineNr | inspector doInspectKey].

	]

    ]

!

sortByAverageSize

    self label:'Memory usage; by average size'.

    sortBlock := [:a :b | ((a at:3)/(a at:2)) > ((b at:3)/(b at:2))].

    self updateDisplay

!

sortByClass

    self label:'Memory usage; by class'.

    sortBlock := [:a :b | (a at:1) displayString "name" < (b at:1) displayString "name"].

    self updateDisplay

    "Modified: 28.6.1996 / 14:32:38 / cg"

!

sortByInstCount

    self label:'Memory usage; by instance count'.

    sortBlock := [:a :b | (a at:2) > (b at:2) ].

    self updateDisplay

!

sortByMemoryUsage

    self label:'Memory usage; by memory usage'.

    sortBlock := [:a :b | (a at:3) > (b at:3)].

    self updateDisplay

!

update

    self updateInfo.

    self updateDisplay

!

usageMenu

    ^ PopUpMenu

	 labels:(resources array:#(

		     'sort by class'

		     'sort by inst count'

		     'sort by memory usage'

		     'sort by average size'

		     '-'

		     'inspect instances'

		     'owners'

		     '-'

		     'update'

		 ))

	 selectors:#(sortByClass

		     sortByInstCount

		     sortByMemoryUsage

		     sortByAverageSize

		     nil

		     inspectInstances

		     inspectOwners

		     nil

		     update

		    ).

! !

!MemoryUsageView methodsFor:'private'!

updateDisplay

    "update the displayed list"

    windowGroup withCursor:Cursor wait do:[

    ]

    "Created: 19.9.1995 / 15:30:47 / claus"

!

updateInfo

    "scan all memory and collect the information"

    windowGroup withCursor:Cursor questionMark do:[

        |myProcess myPriority|

        "find all objects, collect stuff in info"

        "

         this is a time consuming operation; therefore lower my priority ...

        "

        myProcess := Processor activeProcess.

        myPriority := myProcess priority.

        myProcess priority:(Processor userBackgroundPriority).

        rawInfo := IdentityDictionary new:600.

        [   |behaviorFlag|

            behaviorFlag := Behavior flagBehavior.

            ObjectMemory allObjectsDo:[:o |

                |infoArray class bytes|

"/              o isBehavior ifTrue:[

                class := o class.

                (class flags bitAnd:behaviorFlag) ~~ 0 ifTrue:[

                    o isObsolete ifFalse:[

                        o isMeta ifTrue:[

                        ] ifFalse:[

                        ]

                    ]

                ].

                bytes := ObjectMemory sizeOf:o.

                infoArray := rawInfo at:class ifAbsent:[].

                infoArray isNil ifTrue:[

                    infoArray := Array 

                            with:class 

                            with:1 

                            with:bytes

                            with:bytes.

                    rawInfo at:class put:infoArray.

                ] ifFalse:[

                    infoArray at:2 put:((infoArray at:2) + 1).

                    infoArray at:3 put:((infoArray at:3) + bytes).

                    infoArray at:4 put:((infoArray at:4) max: bytes).

                ]

            ].

        ] valueNowOrOnUnwindDo:[

            myProcess priority:myPriority.

        ].

    ]

    "Modified: 19.9.1995 / 15:29:10 / claus"

! !

!MemoryUsageView methodsFor:'realization'!

realize

    super realize.

    self updateInfo.

    self sortByClass.

! !

version

! !