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Debugging Lua script [CE modification, autorun]

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mgr.inz.Player
I post too much

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Joined: 07 Nov 2008
Posts: 4438
Location: W kraju nad Wisla. UTC+01:00

Posted: Wed Jul 31, 2013 8:02 pm Post subject: Debugging Lua script [CE modification, autorun]

For those who are debugging/testing trainers (trainer saved as CT file).

Try to execute this example script:

Code:

RequiredCEVersion=6.3
if (getCEVersion==nil) or (getCEVersion()<RequiredCEVersion) then
messageDialog('Please install Cheat Engine '..RequiredCEVersion, mtError, mbOK)
closeCE()
end
addresslist=getAddressList()

variable1 = 32423
variable2 = 32423

form_show(notExist) -- Obvious, not like form_show(ShowCheatIist)

function AboutClick()
showMessage(gAboutText)
end
gAboutText=[[This trainer was made by Cheat Engine
www.cheatengine.org]]

You will get "undefined lua error" message window and "Error:Invalid class object" string inside log output of "Lua Engine" window. Obviously, it is notExist variable's fault. But, if you have "wall of text", it is hard to catch typos like like this: you typed in form_show(ShowCheatIist) instead of form_show(ShowCheatlist).

My script (move it to autorun):

Code:

function trace(event, line)
local s = debug.getinfo(2).short_src
if not s:match('%[string') then return end
DebugLabel.Caption = "last line executed: "..line
end

frmLuaTableScript = getMainForm().frmAutoInject
frmLuaTableScriptPanel1OnResizeOLD = frmLuaTableScript.Panel1.OnResize

frmLuaTableScript.Panel1.OnResize = function (sender)
frmLuaTableScriptPanel1OnResizeOLD(sender)

DebugButton.Top = Button.Top - 8
DebugButton.Left = Button.Left + 50

DebugLabel.Top = Button.Top + 18
DebugLabel.Left = Button.Left + 55

Button.Left = Button.Left - 80
end

debugOnOffFlag = false

Button = frmLuaTableScript.Button1
Button.AutoSize = true

DebugLabel = createLabel(frmLuaTableScript.Panel1)
DebugLabel.AutoSize = true
DebugLabel.Caption = "debug disabled"

DebugButton = createButton(frmLuaTableScript.Panel1)
DebugButton.AutoSize = true
DebugButton.Caption = "Find faulty line"
DebugButton.Height = Button.Height

DebugButton.OnClick = function ()
debugOnOffFlag = not debugOnOffFlag
if debugOnOffFlag then debug.sethook(trace, "l")
DebugButton.Font.Style = '[fsBold]'
DebugLabel.Caption = "last line executed:"
else debug.sethook()
DebugButton.Font.Style = '[]'
DebugLabel.Caption = "debug disabled"
end
end

Now, you will have additional Button, called "Find faulty line". Click it, it gets bold and label shows "last line executed". Click "Execute script". You will get the same error messages and message window. But, this time you will get "last line executed" info.

In this case: "last line executed: 12"

Edit1:
added comments.

EDIT2:
newest version of this script here LINK

LuaDebug_FindFaultyLine.lua

Description:

Feel free to modify it

Download

Filename:

LuaDebug_FindFaultyLine.lua

Filesize:

1.85 KB

Downloaded:

1150 Time(s)

_________________

Dark Souls II Item Swap and Item List
My Borderlands2 tables

Recent CheatEngine builds

Last edited by mgr.inz.Player on Sun Aug 11, 2013 12:02 pm; edited 3 times in total

DaSpamer
Grandmaster Cheater Supreme

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Joined: 13 Sep 2011
Posts: 1578

Posted: Thu Aug 01, 2013 9:46 am Post subject:

thanks if i could rep u again i would but need to find some else before i can rep u again _________________ HEY Hitler Do you get lazy when making trainers? Well no more! My CETrainer will generate it for you in seconds, so you won't get lazy! http://forum.cheatengine.org/viewtopic.php?t=564919

mgr.inz.Player
I post too much

Reputation: 218

Joined: 07 Nov 2008
Posts: 4438
Location: W kraju nad Wisla. UTC+01:00

Posted: Thu Aug 01, 2013 10:07 am Post subject:

Thanks _________________ Dark Souls II Item Swap and Item List My Borderlands2 tables Recent CheatEngine builds

DaSpamer
Grandmaster Cheater Supreme

Reputation: 52

Joined: 13 Sep 2011
Posts: 1578

Posted: Thu Aug 01, 2013 10:09 am Post subject:

lets hope this will be in the next ce version or build. _________________ HEY Hitler Do you get lazy when making trainers? Well no more! My CETrainer will generate it for you in seconds, so you won't get lazy! http://forum.cheatengine.org/viewtopic.php?t=564919

mgr.inz.Player
I post too much

Reputation: 218

Joined: 07 Nov 2008
Posts: 4438
Location: W kraju nad Wisla. UTC+01:00

Posted: Thu Aug 01, 2013 10:13 am Post subject:

From other thread:

Dark Byte wrote:

I once looked into it but it resulted in a even worse bug, but i'll see (perhaps the debug.hook function might be useful here to see the last called function)

Maybe now he can overcome this problem.
_________________

Dark Souls II Item Swap and Item List
My Borderlands2 tables

Recent CheatEngine builds

mgr.inz.Player
I post too much

Reputation: 218

Joined: 07 Nov 2008
Posts: 4438
Location: W kraju nad Wisla. UTC+01:00

Posted: Sun Aug 11, 2013 10:24 am Post subject:

Small update:
- different button positions...
- extra info about function name

Code:

function trace(event, line)
local s = debug.getinfo(2).short_src
local name = debug.getinfo(2).name
name = name and ' ( func '..name..' )' or ''

if not s:match('%[string') then return end
DebugLabel.Caption = "last line executed: "..line..name
end

frmLuaTableScript = getMainForm().frmAutoInject
frmLuaTableScriptPanel1OnResizeOLD = frmLuaTableScript.Panel1.OnResize

frmLuaTableScript.Panel1.OnResize = function (sender)
frmLuaTableScriptPanel1OnResizeOLD(sender)

Button.Left = Button.Left - 110

DebugButton.Top = Button.Top
DebugButton.Left = Button.Left + 120

DebugLabel.Top = Button.Top + 4
DebugLabel.Left = Button.Left + 250

end

debugOnOffFlag = false

Button = frmLuaTableScript.Button1
Button.AutoSize = true

DebugLabel = createLabel(frmLuaTableScript.Panel1)
DebugLabel.AutoSize = true
DebugLabel.Caption = "debug disabled"

DebugButton = createButton(frmLuaTableScript.Panel1)
DebugButton.AutoSize = true
DebugButton.Caption = "Find faulty line"
DebugButton.Height = Button.Height

DebugButton.OnClick = function ()
debugOnOffFlag = not debugOnOffFlag
if debugOnOffFlag then debug.sethook(trace, "l")
DebugLabel.Caption = "last line executed:"
else debug.sethook()
DebugLabel.Caption = "debug disabled"
end
end

_________________

Dark Souls II Item Swap and Item List
My Borderlands2 tables

Recent CheatEngine builds

DaSpamer
Grandmaster Cheater Supreme

Reputation: 52

Joined: 13 Sep 2011
Posts: 1578

Posted: Sun Aug 11, 2013 10:33 am Post subject:

mgr.inz.Player wrote:

Small update:
- different button positions...
- extra info about function name

Code:

It seems to not display the name var.
Only line, is it suppose to be that?
Also this line is required to executed, if you do not resize the Lua script window.

frmLuaTableScript.Panel1.OnResize()

+Rep, helps alot, thanks.
_________________

HEY Hitler
Do you get lazy when making trainers?
Well no more!
My CETrainer will generate it for you in seconds, so you won't get lazy! Very Happy

http://forum.cheatengine.org/viewtopic.php?t=564919

mgr.inz.Player
I post too much

Reputation: 218

Joined: 07 Nov 2008
Posts: 4438
Location: W kraju nad Wisla. UTC+01:00

Posted: Sun Aug 11, 2013 10:47 am Post subject:

We don't have to call OnResize, this event occurs just after opening LuaTableScript window ("Lua Script: Cheat Table").

Quote:

It seems to not display the name var.

It is function name for most of the time. And maybe something else...

Try this code:

Code:

function testIt()
form_show(nihilNovi)
end

testIt()

_________________

Dark Souls II Item Swap and Item List
My Borderlands2 tables

Recent CheatEngine builds

DaSpamer
Grandmaster Cheater Supreme

Reputation: 52

Joined: 13 Sep 2011
Posts: 1578

Posted: Sun Aug 11, 2013 10:54 am Post subject:

mgr.inz.Player wrote:

We don't have to call OnResize, this event occurs just after opening LuaTableScript window ("Lua Script: Cheat Table").

Quote:

It seems to not display the name var.

It is function name for most of the time. And maybe something else...

Try this code:

Code:

function testIt()
form_show(nihilNovi)
end

testIt()

I execute it via the lua script window, so no wonder why it didn't change it's position Smile

Quote:

function testIt()
form_show(nihilNovi)
end

Seem to work (returns the full line).
Thanks Smile

.
_________________

HEY Hitler
Do you get lazy when making trainers?
Well no more!
My CETrainer will generate it for you in seconds, so you won't get lazy! Very Happy

http://forum.cheatengine.org/viewtopic.php?t=564919

mgr.inz.Player
I post too much

Reputation: 218

Joined: 07 Nov 2008
Posts: 4438
Location: W kraju nad Wisla. UTC+01:00

Posted: Sun Aug 11, 2013 11:26 am Post subject:

DaSpamer wrote:

I execute it via the lua script window, so no wonder why it didn't change it's position Smile

Oh, in that case you need this at the end:

Code:

frmLuaTableScript.Panel1.OnResize()

EDIT:
Another revision, shouldn't interfere with other Lua scripts:

Code:

SimpleLuaDebugger = {}

function SimpleLuaDebugger.Trace(event, line)
local s = debug.getinfo(2).short_src
local name = debug.getinfo(2).name
name = name and ' ( function '..name..' )' or ''

if not s:match('%[string') then return end
SimpleLuaDebugger.DebugLabel.Caption = "Last line executed: "..line..name
end

function SimpleLuaDebugger:Init()
self.frmLuaTableScript = getMainForm().frmAutoInject
self.frmLuaTableScriptPanel1OnResizeOLD = self.frmLuaTableScript.Panel1.OnResize

self.debugOnOffFlag = false

self.Button = self.frmLuaTableScript.Button1
self.Button.AutoSize = true

self.DebugLabel = createLabel(self.frmLuaTableScript.Panel1)
self.DebugLabel.AutoSize = true
self.DebugLabel.Caption = "Lua debug: disabled"

self.DebugButton = createButton(self.frmLuaTableScript.Panel1)
self.DebugButton.AutoSize = true
self.DebugButton.Caption = "Find faulty line"
self.DebugButton.Height = self.Button.Height

self.frmLuaTableScript.Panel1.OnResize = function (sender)
self.frmLuaTableScriptPanel1OnResizeOLD(sender)

self.Button.Left = self.Button.Left - 140

self.DebugButton.Top = self.Button.Top
self.DebugButton.Left = self.Button.Left + 120

self.DebugLabel.Top = self.Button.Top + 4
self.DebugLabel.Left = self.Button.Left + 250
end

self.DebugButton.OnClick = function ()
self.debugOnOffFlag = not self.debugOnOffFlag
if self.debugOnOffFlag then debug.sethook(SimpleLuaDebugger.Trace, "l")
self.DebugLabel.Caption = "Lua debug: enabled"
else debug.sethook()
self.DebugLabel.Caption = "Lua debug: disabled"
end
end

self.frmLuaTableScript.Panel1.OnResize()
end

SimpleLuaDebugger:Init()

LuaDebug_FindFaultyLine.lua

Description:

Download

Filename:

LuaDebug_FindFaultyLine.lua

Filesize:

2.3 KB

Downloaded:

1203 Time(s)

_________________

Dark Souls II Item Swap and Item List
My Borderlands2 tables

Recent CheatEngine builds

bknight2602
Grandmaster Cheater

Reputation: 0

Joined: 08 Oct 2012
Posts: 577

Posted: Sun Feb 27, 2022 6:54 am Post subject:

So, copy this into what I call the debug window and execute? In other words NOT into the main script started by ctrl+alt+L. ETA: Ok, there is a button created on the debug window. Pushed that button and the code seems to be in a loop printing out nothing of befit to me.

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