startx — -listen tcp

With Slackware 14.2 X don’t listen no more unless you tell it to.


The old routine of …


xhost +




export DISPLAY=

xclock &

doesn’t work out of the box


you explicitly tell X to listen

In practical terms that means






startx — -listen tcp








debugger after update on left. before update on right

debugger after update on left. before update on right

Method Category browsing

I want this for some Help documentation in CMakeVMMakerSqueak so I can show the end user all the methods in a specific method category.


Here is a quick example showing all the methods in the Class CompiledMethod under method category ‘accessing-pragmas & properties’:


Browser openBrowserView:((Browser new)
selectSystemCategory: #’Kernel-Methods’;
selectClass: CompiledMethod;
metaClassIndicated: false;
selectMessageCategoryNamed: #’accessing-pragmas & properties’;
selectMessageNamed: nil;
label: ‘Message Category Browser (‘, #’Kernel-Classes’ asString, ‘)’.

You can get that view by right-clicking on the method category name and selecting ‘browse’.

I think a wrapper class for this would be useful.





Here are the command line commands I used to get CogSpur running with a VMMaker image and the CMakeVMakerSqueak package starting from scratch.

#Do an svn checkout

svn co http://www.squeakvm.org/svn/squeak/branches/Cog

#run Eliot’s bash script to get the VMMaker image up and configured.

cd Cog/image
./ buildspurtrunkvmmakerimage.sh
./ cogspurlinuxht/squeak  SpurVMMaker.image  &

#Install the CMakeVMMakerSqueak package and see the documentation
Monticello browser
Repository http://source.squeak.org/VMMaker
CMakeVMMaker (latest) load
CMakeVMMakerSqueak (latest) load
HelpBrowser topic CMakeVMMakerSqueak

save and quit

#set up my personal working environment

#put the executable cog/spur in my PATH

mv cogspurlinuxht /home/tty/usr/bin/

#set up a development area independent of the Cog svn source tree
cd ../../
mkdir cogspurVMMaker
mv Cog/image/SpurVMMaker.* cogspurVMMaker/
mv Cog/image/SqueakV50.sources cogspurVMMaker/

#the tools are installed. now we need to put the Cog source tree
#in a subdirectory of the .image file. The directory is named ‘oscogvm’

cd cogspurVMMaker
mkdir oscogvm
rsync -Carv  –exclude=”image*”  ../Cog/ cogspurVMMaker/

#the resulting work environment directory tree looks like this

tree -d -L 2  cogspurVMMaker/
`– oscogvm
|– build.linux32ARM
|– build.linux32x86
|– build.linux64x64
|– build.macos32x86
|– build.macos64x64
|– build.win32x86
|– history
|– nsspursrc
|– nsspurstack64src
|– nsspurstacksrc
|– nssrc
|– platforms
|– processors
|– products
|– scripts
|– sources
|– spur64src
|– spursistasrc
|– spursrc
|– spurstack64src
|– spurstacksrc
|– src
`– stacksrc


This is a quick note as I get up to speed on the project after a long hiatus. Ben at the mailing list asked for help on getting set up. Here is one of the scripts to install the tools:


| manifest load |
Scanner prefAllowUnderscoreSelectors: true.

manifest := #(    (‘http://source.squeak.org/FFI’                    1    (‘FFI-Pools’ ‘FFI-Kernel’))
(‘http://source.squeak.org/VMMaker’        6    (‘Balloon-Engine-Pools’ ‘VMMaker.oscog’ ‘Cog’ ‘CogTools’ ‘ImageFormat’ ‘CMakeVMMaker’ ‘CMakeVMMakerSqueak’))
(‘http://ss3.gemstone.com/ss/MethodMassage’        3    (‘MethodMassage’ ‘MethodMassageCompatibility’))
(‘http://www.squeaksource.com/AioPlugin’        7    (‘VMConstruction-Plugins-AioPlugin’))
(‘http://www.squeaksource.com/Alien’            0    (‘Alien’))
“(‘http://www.squeaksource.com/FreeTypePlus’    5    (‘FreeType’)) can’t load this.  it is toxic to Squeak 4.5”
(‘http://ss3.gemstone.com/ss/FreeTypePlus’    5    (‘FreeTypeConstants’ ‘FreeType’ ‘FreeTypeTests’))
(‘http://www.squeaksource.com/FreetypePlugin’    8    (‘Freetype-Plugin’))
(‘http://www.squeaksource.com/OSProcess’        4    (‘OSProcess’))
(‘http://www.squeaksource.com/OSProcessPlugin’    9    (‘VMConstruction-Plugins-OSProcessPlugin.oscog’))
(‘http://www.squeaksource.com/rb’                5    (‘AST-Core’ ‘AST-Semantic’ ‘AST-Tests-Core’ ‘AST-Tests-Semantic’ ‘Refactoring-Changes’ ‘Refactoring-Core’ ‘Refactoring-Environment’ ‘Refactoring-Tests-Changes’ ‘Refactoring-Tests-Core’ ‘Refactoring-Tests-Environment’))
(‘http://www.squeaksource.com/Speech’            2    (‘SharedPool-Speech’ ))).

load := (manifest collect:
[:path :order :packages| | repository |
repository := MCHttpRepository
location: path
user: ‘squeak’
password: ‘squeak’.
MCRepositoryGroup default addRepository: repository.
{repository. order. packages}] valueWithArguments: tuple])
sort: [:a :b| a second <= b second].

#(    ‘FT2Constants.st’
) do:
[:fileName| (FileDirectory default fileNamed: fileName) fileIn].

World findATranscript: nil.

load do:
[:repository :order :packages|
packages do:
[:package| | latestVersion |
latestVersion := (repository versionNamesForPackageNamed: package) first.
[| version |
version := ((MCCacheRepository default includesVersionNamed: latestVersion)
ifTrue: [MCCacheRepository default]
ifFalse: [repository]) versionNamed: latestVersion.
version load.
version workingCopy repositoryGroup addRepository: repository]
on: Warning
do: [:ex|
(ex messageText beginsWith: ‘This package depends on the following classes’) ifFalse:
[ex pass].
ex resume]]]
valueWithArguments: tuple].

For those folks getting the pthread_setschedparam the example Eliot gives at http://www.mirandabanda.org/files/Cog/VM/VM.r3006/README.3006 does not apply to Slackware linux and I suspect other distros too.

I did some digging this morning and figured out how to set this up on my system.

This site https://www.hackthissite.org/articles/read/932 gives an overview, but it is a bit outdated.

On Slackware 14.1 the output of ‘man limits’ shows a few more entries

· A: max address space (KB)

· C: max core file size (KB)

· D: max data size (KB)

· F: maximum filesize (KB)

· K: file creation mask, set by umask(2).

· I: max nice value (0..39 which translates to 20..-19)

· L: max number of logins for this user

· M: max locked-in-memory address space (KB)

· N: max number of open files

· O: max real time priority

· P: process priority, set by setpriority(2).

· R: max resident set size (KB)

· S: max stack size (KB)

· T: max CPU time (MIN)

· U: max number of processes

I created the /etc/limits file and added an entry

tty O100

logout out and back in and I was able to run the squeak.cog.v3 build just fine.
Prior to that limit fix, I was getting the dreaded pthread_setschedparam error and could only run the vm as root.

Hope that helps.

I think I have the solution to autoconf not expanding the NoDbgRegParms on my version of the autotools in build.linux32x86/squeak.cog.v3

in Cog/platforms/unix/config/config.h.in add the line

#define NoDbgRegParms

in the header files Cog/src/vm/config/

remove the following construct

#if !defined(NoDbgRegParms)
# define NoDbgRegParms /*empty*/

Reasoning: In the configure template we define the darn thing as an empty sting by default and only set it to something when we intend to use it for debugging.


Tools versions are:
autoconf (GNU Autoconf) 2.69
gcc (GCC) 4.8.2

in Cog/platforms/unix/config/config.h.in add the line

#define NoDbgRegParms

in Cog/src/vm/config/

remove the following construct

#if !defined(NoDbgRegParms)
# define NoDbgRegParms /*empty*/