[lldb-dev] frame variable outputs nothing

[Azat Khuzhin]

On Sun, Mar 22, 2015 at 04:55:02PM +0100, Mikkel Eriksen wrote:
> I unfortunately do not have source access or debug symbols. Can I use the
> method signature to determine the arguments?

You could try do it manually, and you could start from [1] (or what ever
your arch is).

[1] http://en.wikipedia.org/wiki/X86_calling_conventions

> 
> On Sun, Mar 22, 2015 at 4:49 PM, Azat Khuzhin <a3at.mail at gmail.com> wrote:
> 
> > On Sun, Mar 22, 2015 at 04:02:18PM +0100, Mikkel Eriksen wrote:
> > > Hi
> > >
> > > I set a breakpoint and launch an application via lldb, and want to
> > inspect
> > > the arguments of the method when the breakpoint triggers, however nothing
> > > shows:
> > >
> > > (lldb) thread backtrace
> > > * thread #20: tid = 0x1352c6, 0x00000001001eb510
> > > Application`Blitz::sharpen(QImage&, int), name = 'VolumeTabSlotFilter',
> >
> > Here you have only types, but not values, seems that you don't have
> > debug symbols, no?
> >
> > > stop reason = breakpoint 2.1
> > >   * frame #0: 0x00000001001eb510 Application`Blitz::sharpen(QImage&, int)
> > >     frame #1: 0x00000001001dca79 Application`Filter::sharpen(QImage) + 25
> > >     frame #2:
> > > 0x000000010007bbd1 Application`VolumeTab::slotFilter_sharpen() + 145
> > >     frame #3: 0x0000000102dcb80f QtCore`QMetaObject::activate(QObject*,
> > > int, int, void**) + 2591
> > >     frame #4: 0x0000000100080615 Application`VolumeTabSlotFilter::run() +
> > > 309
> > >     frame #5: 0x0000000102b963e3 QtCore`QThreadPrivate::start(void*) +
> > 339
> > >     frame #6: 0x00007fff8f80f268 libsystem_pthread.dylib`_pthread_body +
> > 131
> > >     frame #7: 0x00007fff8f80f1e5 libsystem_pthread.dylib`_pthread_start +
> > > 176
> > >     frame #8: 0x00007fff8f80d41d libsystem_pthread.dylib`thread_start +
> > 13
> > > (lldb) frame variable
> > > (lldb)
> > >
> > > What am I doing wrong? I've tried googling for a solution but have not
> > > found anything.
> >