After setting a breakpoint in Qt, gdb says: “Error accessing memory address”

Question

I wrote a very simple Qt program here:

int main(int argc, char* argv[])
{
    QApplication app(argc, argv);

    QTableView table(&frame         


        

Answer 1

Don't use the gdb command symbol-file to load external symbols. The breakpoint addresses will be wrong since they're not relocated.

Instead, put a breakpoint in main, run the program, and then set your breakpoint:

gdb ./program
GNU gdb 6.8-debian blah blah blah
(gdb) br main
Breakpoint 1 at 0x80489c1
(gdb) run
Starting program: ./program
Breakpoint 1, 0x080489c1 in main ()
(gdb) br 'QAbstractItemView::clicked(QModelIndex const&)'
Breakpoint 2 at 0xb7d24664
(gdb) continue
Continuing.

Then make your breakpoint happen.

Make sure to specify the parameter list in the function you want to set a breakpoint in, without the names of those parameters, just their types.