Re: [rfa/testsuite] check sizeof

[Andrew Cagney <ac131313 at cygnus dot com>]

Stan Shebs wrote:
> 
> Andrew Cagney wrote:
> >
> > Hello,
> >
> > The attatched checks that GDB and the running program agree over how
> > large a few basic C types are.  As a convenience, it also dumps out the
> > gdbarch so that tracking down failures is easier.
> 
> Geez, I must have missed something along the way - normally GDB gets
> its size info from debug bits in the executable, which means that it
> should be impossible for these tests to fail?  But assuming that
> something changed to make it more likely, the tests themselves look
> satisfactory as the way to discover the discrepancy.

The problem I'm seeing is comming from the fact that GDB likes to
hardwire the various gdbtypes.h:builtin_type_*s.  At present the
architecture gets to specify the value at runtime (originally it was
compiled in using #define ....).  Sounds like there is also the
possability of setting these types from the debug info.

Thanks.

BTW, I also wonder if a few other tests could be simplified with this
technique.  Have the gdb.*/*.exp file ask GDB what the type system is
like and then test things based on that.

	Andrew