Re: [Qemu-devel] [PATCH v2] target-i386: Print warning when mixing [+-]foo and foo=(on|off)

[Igor Mammedov <imammedo@redhat.com>]

On Mon, 24 Oct 2016 11:14:24 -0200
Eduardo Habkost <ehabkost@redhat.com> wrote:

> On Mon, Oct 24, 2016 at 01:36:16PM +0200, Igor Mammedov wrote:
> [...]
> > > +#ifdef CONFIG_HAS_GLIB_SUBPROCESS_TESTS
> > > +static void test_plus_minus(void)
> > > +{
> > > +    g_test_trap_subprocess("/x86/cpuid/parsing-plus-minus/subprocess", 0, 0);
> > > +    g_test_trap_assert_passed();
> > > +    g_test_trap_assert_stderr("*Ambiguous CPU model string. "
> > > +                              "Don't mix both \"-mce\" and \"mce=on\"*");
> > > +    g_test_trap_assert_stderr("*Ambiguous CPU model string. "
> > > +                              "Don't mix both \"+cx8\" and \"cx8=off\"*");
> > > +    g_test_trap_assert_stdout("");
> > > +}
> > > +#endif  
> > Are there any reason to keep both subprocess and inprocess variants?  
> 
> Because g_test_trap_subprocess() needs it. It takes a test path
> as argument and runs another test case in a subprocess. Tests
> containing "subprocess" as a path component are skipped by
> default (so test_plus_minus_subprocess() is only run in a
> subprocess).
Ah I see, you are using subprocess to trap warnings on stderr

> >   
> > > +
> > >  int main(int argc, char **argv)
> > >  {
> > >      g_test_init(&argc, &argv, NULL);
> > >  
> > > -    qtest_add_func("x86/cpuid/parsing-plus-minus", test_plus_minus);
> > > +    g_test_add_func("/x86/cpuid/parsing-plus-minus/subprocess",
> > > +                    test_plus_minus_subprocess);
> > > +#ifdef CONFIG_HAS_GLIB_SUBPROCESS_TESTS
> > > +    g_test_add_func("/x86/cpuid/parsing-plus-minus", test_plus_minus);
> > > +#endif
> > >  
> > >      /* Original level values for CPU models: */
> > >      add_cpuid_test("x86/cpuid/phenom/level",  
> >   
>