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List: kdevelop-bugs
Subject: [Bug 113834] New: Using Qt in Kdevelop the Debugger is virtually useless
From: kdevelop-bugs-admin () barney ! cs ! uni-potsdam ! de
Date: 2005-10-04 13:31:59
Message-ID: 20051004153155.113834.jdhenning () gmx ! de
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http://bugs.kde.org/show_bug.cgi?id=113834
Summary: Using Qt in Kdevelop the Debugger is virtually useless
Product: kdevelop
Version: unspecified
Platform: SuSE RPMs
OS/Version: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: general
AssignedTo: kdevelop-bugs kdevelop org
ReportedBy: jdhenning gmx de
Version: 3.4 (using KDE KDE 3.4.0)
Installed from: SuSE RPMs
OS: Linux
I'm using Suse Linux 9.3 and KDevelop 3.4.0 "level b"
Actually I'm writing a program using linked lists, so I desperately need the debugger \
in order to keep track of what is happening.
The problem is, that out of unknown reasons, seemingly the optimisation flag for the \
compiler is set. First there is no rational reason why this is done and additionally \
I have found no place where to change this setting.
The consequence is that, when debugging, variables are not known. They are either not \
displayed under the local variables or it says "optimised out". When loading the \
variable-name into the global area, the display says "No symbol xxx in current \
context".
Additionally the debugger jumps up and down in the program, sometimes changing the \
value of variables that should not be affected at all and giving no chance to see, \
whether what the program does has anything to do with what I programed.
In some ocasions I had the impression that even the result of a computation changed \
when either using one-line-loops instead of expression
{
lines of code
};
But as I said, this is an impression and I was not able to nail it down.
In consequence it is virtually impossible to debug programs under Kdevelop using \
Qt-User-Interfaces.
Since the installation of a new project with user interface under KDevelop is a pain, \
I built the ui-files under original Qt, copy them to the KDevelop-project and import \
them there. This might have an influence on the problem but anyhaow it should not.
If there is a work-around please let me know asap.
Cheers
Jürgen D. Henning
Following the content of the different files:
form1.ui.h
/****************************************************************************
** ui.h extension file, included from the uic-generated form implementation.
**
** If you want to add, delete, or rename functions or slots, use
** Qt Designer to update this file, preserving your code.
**
** You should not define a constructor or destructor in this file.
** Instead, write your code in functions called init() and destroy().
** These will automatically be called by the form's constructor and
** destructor.
*****************************************************************************/
#include <qlcdnumber.h>
void Form1::calculate_it()
{
int I, J, saveI;
J = 20;
I = 10;
saveI = I;
I = J;
J = saveI;
Number1->display(I);
Number2->display(J);
}
faul.pro
TEMPLATE = app
LANGUAGE = C++
CONFIG += qt warn_on release
SOURCES += main.cpp
FORMS = form1.ui
unix {
UI_DIR = .ui
MOC_DIR = .moc
OBJECTS_DIR = .obj
}
main.cpp
#include <qapplication.h>
#include "form1.h"
int main( int argc, char ** argv )
{
QApplication a( argc, argv );
Form1 w;
w.show();
a.connect( &a, SIGNAL( lastWindowClosed() ), &a, SLOT( quit() ) );
return a.exec();
}
form1.ui
<!DOCTYPE UI><UI version="3.3" stdsetdef="1">
<class>Form1</class>
<widget class="QDialog">
<property name="name">
<cstring>Form1</cstring>
</property>
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>281</width>
<height>119</height>
</rect>
</property>
<property name="caption">
<string>Form1</string>
</property>
<widget class="QPushButton">
<property name="name">
<cstring>pushButton1</cstring>
</property>
<property name="geometry">
<rect>
<x>20</x>
<y>60</y>
<width>101</width>
<height>31</height>
</rect>
</property>
<property name="text">
<string>&Calculate</string>
</property>
</widget>
<widget class="QPushButton">
<property name="name">
<cstring>pushButton2</cstring>
</property>
<property name="geometry">
<rect>
<x>140</x>
<y>60</y>
<width>101</width>
<height>31</height>
</rect>
</property>
<property name="text">
<string>Exi&t</string>
</property>
</widget>
<widget class="QLCDNumber">
<property name="name">
<cstring>Number1</cstring>
</property>
<property name="geometry">
<rect>
<x>20</x>
<y>10</y>
<width>91</width>
<height>31</height>
</rect>
</property>
</widget>
<widget class="QLCDNumber">
<property name="name">
<cstring>Number2</cstring>
</property>
<property name="geometry">
<rect>
<x>140</x>
<y>10</y>
<width>81</width>
<height>31</height>
</rect>
</property>
</widget>
</widget>
<connections>
<connection>
<sender>pushButton2</sender>
<signal>clicked()</signal>
<receiver>Form1</receiver>
<slot>close()</slot>
</connection>
<connection>
<sender>pushButton1</sender>
<signal>clicked()</signal>
<receiver>Form1</receiver>
<slot>calculate_it()</slot>
</connection>
</connections>
<includes>
<include location="local" impldecl="in implementation">form1.ui.h</include>
</includes>
<slots>
<slot>calculate_it()</slot>
</slots>
<pixmapinproject/>
<layoutdefaults spacing="6" margin="11"/>
</UI>
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