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Safely retrieve self from proc in mrb_yield()

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Passing a proc generated by the following method to `mrb_yield()` or `mrb_yield_argv()` no longer causes `SIGSEGV`:

- C functions made into proc objects with `mrb_proc_new_cfunc()`.
- A proc object which is the top level of a program generated by `mrb_load_string_cxt()` etc. with `mrbc_context::no_exec` enabled.

See also: #5932
This commit is contained in:
dearblue
2023-03-14 23:03:25 +09:00
parent 62a8ea7113
commit 2675477f07
3 changed files with 30 additions and 2 deletions
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include/mruby/internal.h
+1
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@@ -117,6 +117,7 @@ struct REnv *mrb_env_new(mrb_state *mrb, struct mrb_context *c, mrb_callinfo *ci
void mrb_proc_merge_lvar(mrb_state *mrb, mrb_irep *irep, struct REnv *env, int num, const mrb_sym *lv, const mrb_value *stack);
mrb_value mrb_proc_local_variables(mrb_state *mrb, const struct RProc *proc);
const struct RProc *mrb_proc_get_caller(mrb_state *mrb, struct REnv **env);
mrb_value mrb_proc_get_self(mrb_state *mrb, struct RProc *p, struct RClass **target_class_p);
#endif
/* range */