Re: bi-arch test patch for 64-bit frysk

[Wu Zhou <woodzltc at cn dot ibm dot com>]

Andrew Cagney wrote:
> Hi Yong,
> Since the intent is to fully support 32 bit debugging on 64-bit, I think 
> we need to find a more robust and consistent way to always run these (or 
> at least a specific set of) tests.  Perhaps consider it at two levels:

Yes.  This is our thought too.

> - testing 32- x 64-bit features
> For instance: a 32-bit program exec-ing a 64-bit program and vice-versa; 
> 32-bit registers read correctly when 64-bit frysk; ...

New testcases are needed to do these.  We are adding a testcase for 64-bit Frysk to read/write 
32-bit registers on ppc64.

> - generic testing as either 32- or 64- bit
> This is less focused but what the below does.  Unless it is going to be 
> fully integrated and installed, I'm not sure how useful it is when 
> compared to better focused tests.  However, looking at a way to get 
> funit (the installed JUnit TestRunner) to be able to do this might be 
> useful.

We would like it to be fully integrated and installed into Frysk's code base.  But we are not sure 
wihch way to take.  Can you give us some more detail about how we can get funit to do this?  We 
don't have much understanding about how TestRunner, funit, funit-* interact.  Specifically I don't 
know what role funit plays in this game. (I can dive into the code, but it will save us some time if 
you can give a big picture first. :-)

Regards
- Wu Zhou

> Yong Zheng wrote:
> > hi,
> >
> > On PPC64, all applications are compiled into 32-bit mode by default if
> > the compiling option "-m64" isn't explicitly given, which means most
> > applications running on PPC64 are in 32-bit mode.  So it's necessary for
> > 64-bit frysk to debug 32-bit applications on PPC64.
> > Currently, funit(in frysk-core/frysk/pkglibexecdir/) should be build in
> > 64-bit mode, since it is dependent on other 64-bit frysk libraries, such
> > as libfrysk-core.a.  In order to build other test cases in 32-bit mode
> > without breaking the 64-bit funit, one rule in Makefile.am is added.
> > That is to say, we remove all existent test cases(64-bit) except funit,
> > and rebuild them in 32-bit mode.  All these 32-bit test cases could be
> > run via TestRunner.
> >
> > On X86_64, although applications are compiled in 64-bit mode by default,
> > it's also necessary to do bi-arch test.  The modifications will be
> > useful to 64-bit frysk on X86_64.
> >
> > Among the frysk's five main sub-directories, frysk-gtk, frsyk-gui,
> > frysk-import and frysk-sys needn't do the bi-arch tests for their less
> > arch-dependence.  So no rules are added for them. If someone thinks it's
> > also necessary, we'd like to add rules for them.
> >
> > Please review, and any comments are welcome!
> > Thanks!
> >
> > 2006-08-24  Yong Zheng  <zhengyo@cn.ibm.com>
> >
> >     * frysk-core/Makefile.am: Add support for compiling 32bit
> >     testcases.
> >
> >
> > Best regards
> > Yong Zheng
> >
> >   
> > ------------------------------------------------------------------------
> >
> > Index: frysk-core/Makefile.am
> > ===================================================================
> > RCS file: /cvs/frysk/frysk-core/Makefile.am,v
> > retrieving revision 1.61
> > diff -u -r1.61 Makefile.am
> > --- frysk-core/Makefile.am    17 Aug 2006 01:54:27 -0000    1.61
> > +++ frysk-core/Makefile.am    24 Aug 2006 07:24:18 -0000
> > @@ -120,3 +120,7 @@
> >  .PHONY: installcheck-funit
> >  installcheck-funit:
> >      $(DESTDIR)$(pkglibexecdir)/funit
> > +
> > +64test32:
> > +    -rm -fr frysk/pkglibexecdir/funit-*
> > +    $(MAKE) $(pkglibexec_PROGRAMS) CC="gcc -m32" CCAS="gcc -m32" 
> > CXX="g++ -m32"
> >