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kconfig: fix randconfig for choice blocks

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Ingo Molnar reported that 'make randconfig' was not covering
choice blocks properly, resulting in certain config options
being left out of randconfig testing altogether.

With the following patch we:
- properly randomize choice value for normal choice blocks
- properly randomize for multi choice blocks
- added several comments to explain what is going on

The root cause of the bug was that SYMBOL_VALID was set on the
symbol representing the choice block so clearing this did
the trick initially.
But testign revealed a few more issues that is now fixed.

Reported-by: Ingo Molnar <mingo@elte.hu>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
This commit is contained in:
Sam Ravnborg 2009-03-15 11:05:12 +01:00
parent 5bee17f18b
commit 184832c981
1 changed files with 36 additions and 15 deletions
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51
scripts/kconfig/confdata.c
View file

@ -843,7 +843,7 @@ void conf_set_all_new_symbols(enum conf_def_mode mode)
default:
continue;
}
if (!sym_is_choice(sym) || mode != def_random)
if (!(sym_is_choice(sym) && mode == def_random))
sym->flags |= SYMBOL_DEF_USER;
break;
default:
@ -856,28 +856,49 @@ void conf_set_all_new_symbols(enum conf_def_mode mode)
if (mode != def_random)
return;
/*
* We have different type of choice blocks.
* If curr.tri equal to mod then we can select several
* choice symbols in one block.
* In this case we do nothing.
* If curr.tri equal yes then only one symbol can be
* selected in a choice block and we set it to yes,
* and the rest to no.
*/
for_all_symbols(i, csym) {
if (sym_has_value(csym) || !sym_is_choice(csym))
continue;
sym_calc_value(csym);
if (csym->curr.tri != yes)
continue;
prop = sym_get_choice_prop(csym);
def = -1;
while (1) {
cnt = 0;
expr_list_for_each_sym(prop->expr, e, sym) {
if (sym->visible == no)
continue;
if (def == cnt++) {
csym->def[S_DEF_USER].val = sym;
break;
}
/* count entries in choice block */
cnt = 0;
expr_list_for_each_sym(prop->expr, e, sym)
cnt++;
/*
* find a random value and set it to yes,
* set the rest to no so we have only one set
*/
def = (rand() % cnt);
cnt = 0;
expr_list_for_each_sym(prop->expr, e, sym) {
if (def == cnt++) {
sym->def[S_DEF_USER].tri = yes;
csym->def[S_DEF_USER].val = sym;
}
else {
sym->def[S_DEF_USER].tri = no;
}
if (def >= 0 || cnt < 2)
break;
def = (rand() % cnt) + 1;
}
csym->flags |= SYMBOL_DEF_USER;
/* clear VALID to get value calculated */
csym->flags &= ~(SYMBOL_VALID);
}
}