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libsepol/cil: Only reset AST if optional has a declaration

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When disabling optionals, the AST needs to be reset only if one
of the optional blocks being disabled contains a declaration.

Call the function cil_tree_subtree_has_decl() for each optional
block being disabled and only reset the AST if one of them has
a declaration in it.

Signed-off-by: James Carter <jwcart2@gmail.com>
This commit is contained in:
James Carter 2021-06-24 15:58:15 -04:00 committed by Nicolas Iooss
parent 20271849d5
commit 4ff514a33e
No known key found for this signature in database
GPG Key ID: C191415F340DAAA0
1 changed files with 33 additions and 23 deletions
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22
libsepol/cil/src/cil_resolve_ast.c
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@ -4230,12 +4230,21 @@ int cil_resolve_ast(struct cil_db *db, struct cil_tree_node *current)
if (changed) {
struct cil_list_item *item;
if (pass > CIL_PASS_CALL1) {
/* Need to re-resolve because an optional was disabled that contained
* one or more declarations. We only need to reset to the call1 pass
* because things done in the preceding passes aren't allowed in
* optionals, and thus can't be disabled.
* Note: set pass to CIL_PASS_CALL1 because the pass++ will increment
* it to CIL_PASS_CALL2
int has_decls = CIL_FALSE;
cil_list_for_each(item, extra_args.to_destroy) {
has_decls = cil_tree_subtree_has_decl(item->data);
if (has_decls) {
break;
}
}
if (has_decls) {
/* Need to re-resolve because an optional was disabled that
* contained one or more declarations.
* Everything that needs to be reset comes after the
* CIL_PASS_CALL2 pass. We set pass to CIL_PASS_CALL1 because
* the pass++ will increment it to CIL_PASS_CALL2
*/
cil_log(CIL_INFO, "Resetting declarations\n");
@ -4259,6 +4268,7 @@ int cil_resolve_ast(struct cil_db *db, struct cil_tree_node *current)
goto exit;
}
}
}
cil_list_for_each(item, extra_args.to_destroy) {
cil_tree_children_destroy(item->data);
}