Qt Creator debugging problem - GDB

[tamscot]

Hi people,

New to Qt programming, but not C++ or programming in general.

I have a particular problem trying to debug a program with QtCreator. I set a breakpoint, run debug and get this particular message...

&"warning: GDB: Failed to set controlling terminal: Invalid argument\n"

&"warning: GDB: Failed to set controlling terminal: Invalid argument\n"

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Program runs normally but does not stop at breakpoint or anywhere in the program. I did try a search but nothing comes up apart from a post a couple of years ago and solutions then were rather vague.

System: Fedora 17 (64 bit)
Qt Creator 2.4.1
Based on Qt 4.8.0 (64 bit)
GNU gdb (GDB) Fedora (7.4.50.20120120-49.fc17)

Anyone encountered this problem before.

[ChrisW67]

The warning message and the problem are unrelated. You can safely ignore the warning.

Not stopping at a breakpoint can occur for two reasons:

• Control never reaches the breakpoint (whether you think it should or not)
• The executable is built in release mode without debug information. This usually elicits a warning to that effect when starting the debug session.

[pk]

Hi,

have the same problem and warning at a QtTest project. Other projects stops at breakpoints but not my test project. The test runs without errors.

System: OpenSuse 11.3 64Bit (german)
Qt 4.8.1 64Bit
QCreator 2.4.1 64Bit
GNU gdb (GDB) SUSE (7.1-3.12)

Settings:
CONFIG += debug
QT += testlib
QT -= gui
- No qml debugging

tst_test.cpp

...
QTEST_APPLESS_MAIN(AircraftMotionTest)
 
#include "tst_AircraftMotionTest.moc"

...
QTEST_APPLESS_MAIN(AircraftMotionTest)

#include "tst_AircraftMotionTest.moc"

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What I have done so far:
- Ensure that it is a debug version. A qDebug statement is printed out. But a breakpoint at this statement is ignored.
- Open the test project alone. Nothing changed


Why breakpoints are ignored at my test project?

[ktk]

You could check whether there's something questionable in the debugger log (Windows->Views->Debugger Log).

[catchxiaoshuang]

have you solved this problem??
i have similar problem like you.

it's all about my CONFIG of can not debugging;
i modified my 'CONFIG += release' to 'CONFIG += debug' or just delete 'release' or 'debug' in CONFIG, it works well. all those changes must rebuild.
but the warning as you posted is still show up;

I hope this can help you something.

i will upgrade my GDB to see if it can works