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Fix super from aliased methods to work correctly; fix #4718

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We needed to preserve the original method name somewhere. We kept it in
the `env` structure pointed from aliased methods. #1457 and #1531 tried
to address this issue. But this patch is more memory efficient.

Limitation: this fix does not support `super` from methods defined by
`define_method`. This limitation may be addressed in the future, but
it's low priority.
This commit is contained in:
Yukihiro "Matz" Matsumoto
2019-09-18 10:31:28 +09:00
parent 47add060cc
commit ca2d47c20f
3 changed files with 28 additions and 2 deletions
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src/class.c
+19
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@@ -1741,6 +1741,25 @@ mrb_alias_method(mrb_state *mrb, struct RClass *c, mrb_sym a, mrb_sym b)
{
mrb_method_t m = mrb_method_search(mrb, c, b);
if (!MRB_METHOD_CFUNC_P(m)) {
struct RProc *p = MRB_METHOD_PROC(m);
if (MRB_PROC_ENV_P(p)) {
MRB_PROC_ENV(p)->mid = b;
}
else {
struct RClass *tc = MRB_PROC_TARGET_CLASS(p);
struct REnv *e = (struct REnv*)mrb_obj_alloc(mrb, MRB_TT_ENV, NULL);
e->mid = b;
if (tc) {
e->c = tc;
mrb_field_write_barrier(mrb, (struct RBasic*)e, (struct RBasic*)tc);
}
p->e.env = e;
p->flags |= MRB_PROC_ENVSET;
}
}
mrb_define_method_raw(mrb, c, a, m);
}