Inject .dll into Qt and call functions
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@Johannes-S
Hi,However, the problem still persists: I tried resizing with setGeometry() and resize(), I tried to call update() and repaint() afterwards, but the clipping still does occur.
Does the window resize itself though, the clipping aside?
Any idea how I can fix that?
It really depends on how the application actually implemented the resizing/painting.
Is there a chance I can identify the functions that are called when I resize the window manually (by mouse dragging?).
Well, dragging the window will fire
QResizeEvents, but how exactly those are handled can't be known at that level. The events can be intercepted before they reach the widget by installing an event filter, but I don't see how this'd help.@kshegunov said:
Does the window resize itself though, the clipping aside?
So yeah, the window is smaller/bigger than before. Only the client area doesn't adjust properly.
I've tried sending QResizeEvents, but that didnt really help.Isn't there a way to monitor the functions that are being called? If I could do that, I could resize the window by mouse and watch which functions are being used to resize..
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@kshegunov said:
Does the window resize itself though, the clipping aside?
So yeah, the window is smaller/bigger than before. Only the client area doesn't adjust properly.
I've tried sending QResizeEvents, but that didnt really help.Isn't there a way to monitor the functions that are being called? If I could do that, I could resize the window by mouse and watch which functions are being used to resize..
@Johannes-S said:
Isn't there a way to monitor the functions that are being called?
In an optimized compiled code (like Qt that's used in this case), no, not really. The compiler have probably inlined whatever it could and stripped many of the
callinstructions (you'd expect such when a function is called). And even if it hadn't it would take ages to sift through the assembly, and all that for a dubious result. The stack frame won't have any references to function names, only to addresses, so it's simply not worth even trying.One thing you could attempt is to inspect the properties of the main window or the central widget. It may be set to not resize through the size policy and/or minimum/maximum size, or in some other fashion. Currently, I don't have any better ideas.
Although I haven't done this, as a last resort you could in principle try to overwrite the virtual table, if in fact the
resizeEventfunction was overriden ... -
Isn't it the purpose of GammaRay?
https://github.com/KDAB/GammaRay -
Hi, just a thought
Maybe try to use findChildren and dump all ClassNames to see
how its structured.
That might give hints on what we need to target to resize.
also as @kshegunov, dump sizepol, min,max and geometry
for all Widgets owned by mainwin and childs. -
Isn't it the purpose of GammaRay?
https://github.com/KDAB/GammaRay@JulienMaille
Possibly, but I don't know if it'll work without the debug information. Worth a try though. -
Thanks a million guys, didn't have time to look into it today, but I'll try everything out tomorrow and let you know how it worked!
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Okay, I've tried to dump some info on the window. This is what I got:
Dumping window info: Class name: TableMainWidget Horizontal size policy: 5 Vertical size policy: 5 Minimum size: 480/340 Maximum size: 2560/1815 44 children found: Class name: QRubberBand Class name: QWidget Form Class name: TableLayoutWidget Class name: QGraphicsView Class name: QWidget Class name: QScrollBar Class name: QWidget Class name: QScrollBar Class name: QWidget Class name: QWidget Class name: QWidget Form Class name: CMinigamesTitleWidget Class name: QWidget Class name: QGraphicsView Class name: QWidget Class name: QScrollBar Class name: QWidget Class name: QScrollBar Class name: QWidget Class name: QWidget Class name: QGraphicsView Class name: QWidget Class name: QScrollBar Class name: QWidget Class name: QScrollBar Class name: QWidget Class name: QScrollArea Class name: QWidget Form Class name: CMinigamesPanelWidget Class name: QWidget Class name: QWebView Betfair Class name: QWebView Class name: QWidget Class name: QScrollBar Class name: QWidget Class name: QScrollBar Class name: QWidget Class name: QWidget Class name: QWidget Class name: QWidget Class name: QWidget Class name: QWidget Class name: QWidget Class name: QWidgetNot that helpful so far...I'm trying to get GammaRay to work.
EDIT: So, I've cloned the git repo and cmake. I've used the cmake gui to build GammaRay with the visual studio 12 compiler. Then I've opened the solution file and built it with Qt5.
For two files, I'm getting this error:qtmain.lib(qtmain_win.obj) : error LNK2038: mismatch detected for '_MSC_VER': value '1600' doesn't match value '1800' in main.objThe other 70 succeed. I then tried to start the gammaray.exe, but I'm getting:
error1
error2What am I doing wrong here? Sorry that I seem to be so incompetent, I'm always struggling with this sh*t..
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Okay, I've tried to dump some info on the window. This is what I got:
Dumping window info: Class name: TableMainWidget Horizontal size policy: 5 Vertical size policy: 5 Minimum size: 480/340 Maximum size: 2560/1815 44 children found: Class name: QRubberBand Class name: QWidget Form Class name: TableLayoutWidget Class name: QGraphicsView Class name: QWidget Class name: QScrollBar Class name: QWidget Class name: QScrollBar Class name: QWidget Class name: QWidget Class name: QWidget Form Class name: CMinigamesTitleWidget Class name: QWidget Class name: QGraphicsView Class name: QWidget Class name: QScrollBar Class name: QWidget Class name: QScrollBar Class name: QWidget Class name: QWidget Class name: QGraphicsView Class name: QWidget Class name: QScrollBar Class name: QWidget Class name: QScrollBar Class name: QWidget Class name: QScrollArea Class name: QWidget Form Class name: CMinigamesPanelWidget Class name: QWidget Class name: QWebView Betfair Class name: QWebView Class name: QWidget Class name: QScrollBar Class name: QWidget Class name: QScrollBar Class name: QWidget Class name: QWidget Class name: QWidget Class name: QWidget Class name: QWidget Class name: QWidget Class name: QWidget Class name: QWidgetNot that helpful so far...I'm trying to get GammaRay to work.
EDIT: So, I've cloned the git repo and cmake. I've used the cmake gui to build GammaRay with the visual studio 12 compiler. Then I've opened the solution file and built it with Qt5.
For two files, I'm getting this error:qtmain.lib(qtmain_win.obj) : error LNK2038: mismatch detected for '_MSC_VER': value '1600' doesn't match value '1800' in main.objThe other 70 succeed. I then tried to start the gammaray.exe, but I'm getting:
error1
error2What am I doing wrong here? Sorry that I seem to be so incompetent, I'm always struggling with this sh*t..
@Johannes-S GammaRay needs to be compiled for exactly the Qt version you are using in the application you are debugging (and on most platforms even with the same compiler and compiler settings)
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Okay, I've tried to dump some info on the window. This is what I got:
Dumping window info: Class name: TableMainWidget Horizontal size policy: 5 Vertical size policy: 5 Minimum size: 480/340 Maximum size: 2560/1815 44 children found: Class name: QRubberBand Class name: QWidget Form Class name: TableLayoutWidget Class name: QGraphicsView Class name: QWidget Class name: QScrollBar Class name: QWidget Class name: QScrollBar Class name: QWidget Class name: QWidget Class name: QWidget Form Class name: CMinigamesTitleWidget Class name: QWidget Class name: QGraphicsView Class name: QWidget Class name: QScrollBar Class name: QWidget Class name: QScrollBar Class name: QWidget Class name: QWidget Class name: QGraphicsView Class name: QWidget Class name: QScrollBar Class name: QWidget Class name: QScrollBar Class name: QWidget Class name: QScrollArea Class name: QWidget Form Class name: CMinigamesPanelWidget Class name: QWidget Class name: QWebView Betfair Class name: QWebView Class name: QWidget Class name: QScrollBar Class name: QWidget Class name: QScrollBar Class name: QWidget Class name: QWidget Class name: QWidget Class name: QWidget Class name: QWidget Class name: QWidget Class name: QWidget Class name: QWidgetNot that helpful so far...I'm trying to get GammaRay to work.
EDIT: So, I've cloned the git repo and cmake. I've used the cmake gui to build GammaRay with the visual studio 12 compiler. Then I've opened the solution file and built it with Qt5.
For two files, I'm getting this error:qtmain.lib(qtmain_win.obj) : error LNK2038: mismatch detected for '_MSC_VER': value '1600' doesn't match value '1800' in main.objThe other 70 succeed. I then tried to start the gammaray.exe, but I'm getting:
error1
error2What am I doing wrong here? Sorry that I seem to be so incompetent, I'm always struggling with this sh*t..
@Johannes-S
Besides Gamma ray, i'd suggest focusing your investigations onCMinigamesPanelWidgetsubclass (possibly onBetfairas well). -
@Johannes-S GammaRay needs to be compiled for exactly the Qt version you are using in the application you are debugging (and on most platforms even with the same compiler and compiler settings)
@JulienMaille Yeah I figured that out, but I wasn't even able to start GammaRay without attaching it to anything...
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Thank you very much, all of you who helped me here!
I finally got it to work today. It was the TableLayoutWidget, which I had tried to resize before, but I made a stupid mistake...I checked if the className was equal to "TableLayoutWidget" and resized only if it was. However, since I received the classname as a const char* the comparison to a string always failed and nothing happened...So now all thats left to do is to find a way to easily communicate with the process to resize windows without reinjecting a .dll every time.
Thanks again!
EDIT: Do you know if there's a way to automatically subclass (SetWindowLong with a new WndProc) all windows of a process?
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Thank you very much, all of you who helped me here!
I finally got it to work today. It was the TableLayoutWidget, which I had tried to resize before, but I made a stupid mistake...I checked if the className was equal to "TableLayoutWidget" and resized only if it was. However, since I received the classname as a const char* the comparison to a string always failed and nothing happened...So now all thats left to do is to find a way to easily communicate with the process to resize windows without reinjecting a .dll every time.
Thanks again!
EDIT: Do you know if there's a way to automatically subclass (SetWindowLong with a new WndProc) all windows of a process?
@Johannes-S
I'm glad it worked.So now all thats left to do is to find a way to easily communicate with the process to resize windows without reinjecting a .dll every time.
This may not be possible, although don't hold me to that statement.
Do you know if there's a way to automatically subclass (SetWindowLong with a new WndProc) all windows of a process?
I have no clue what you're talking about, but it's probably just me. I haven't developed for Windows for quite a lot of years.
Kind regards.
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Hi, sorry for the bump. I am upping this because I'd like to share some more thoughts about this topic with @Johannes-S. I hope I didn't break any rules.
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@Johannes-S
hi , i use CreateRemoteThread to inject a dll into a qt application ,after QCoreApplication::instance()->installEventFilter (this);
eventFilter doesnt work... i dont know why...please help@yue-feng said in Inject .dll into Qt and call functions:
please help
How? You don't provide much information.
Did you verify that QCoreApplication::instance()->installEventFilter (this) is called?
If it is called did you do any debugging to see whether you event filter is called? -
@yue-feng said in Inject .dll into Qt and call functions:
please help
How? You don't provide much information.
Did you verify that QCoreApplication::instance()->installEventFilter (this) is called?
If it is called did you do any debugging to see whether you event filter is called? -
@jsulm
i tested yesterday, the reason why eventFilter doesnt work is that the ptr get from QCoreApplication::instance() is nullptr.....
i think i use QCoreApplication::instance() in a wrong place...@yue-feng said in Inject .dll into Qt and call functions:
i think i use QCoreApplication::instance() in a wrong place
Yes, looks like you use it before QCoreApplication instance is created.
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@yue-feng said in Inject .dll into Qt and call functions:
i think i use QCoreApplication::instance() in a wrong place
Yes, looks like you use it before QCoreApplication instance is created.
