fix rp(obj) for any object

Now `rp(obj)` doesn't work if the `obj` is out-of-heap because
of `asan_unpoisoning_object()`, so this patch solves it.

Also add pointer information and type information to show.

Author: ko1

gc.c

@@ -4770,6 +4770,7 @@ rb_raw_obj_info_common(char *const buff, const size_t buff_size, const VALUE obj
         // const int age = RVALUE_AGE_GET(obj);
 
         if (rb_gc_impl_pointer_to_heap_p(rb_gc_get_objspace(), (void *)obj)) {
+            APPEND_F("%p %s/", (void *)obj, obj_type_name(obj));
             // TODO: fixme
             // APPEND_F("%p [%d%s%s%s%s%s%s] %s ",
             //          (void *)obj, age,
@@ -4797,7 +4798,7 @@ rb_raw_obj_info_common(char *const buff, const size_t buff_size, const VALUE obj
         else if (RTEST(RBASIC(obj)->klass)) {
             VALUE class_path = rb_class_path_cached(RBASIC(obj)->klass);
             if (!NIL_P(class_path)) {
-                APPEND_F("(%s)", RSTRING_PTR(class_path));
+                APPEND_F("%s ", RSTRING_PTR(class_path));
             }
         }
     }
@@ -5032,15 +5033,35 @@ rb_asan_poisoned_object_p(VALUE obj)
     return __asan_region_is_poisoned(ptr, rb_gc_obj_slot_size(obj));
 }
 
+static void
+raw_obj_info(char *const buff, const size_t buff_size, VALUE obj)
+{
+    size_t pos = rb_raw_obj_info_common(buff, buff_size, obj);
+    pos = rb_raw_obj_info_buitin_type(buff, buff_size, obj, pos);
+    if (pos >= buff_size) {} // truncated
+}
+
 const char *
 rb_raw_obj_info(char *const buff, const size_t buff_size, VALUE obj)
 {
-    asan_unpoisoning_object(obj) {
-        size_t pos = rb_raw_obj_info_common(buff, buff_size, obj);
-        pos = rb_raw_obj_info_buitin_type(buff, buff_size, obj, pos);
-        if (pos >= buff_size) {} // truncated
-    }
+    void *objspace = rb_gc_get_objspace();
 
+    if (SPECIAL_CONST_P(obj)) {
+        raw_obj_info(buff, buff_size, obj);
+    }
+    else if (!rb_gc_impl_pointer_to_heap_p(objspace, (const void *)obj)) {
+        snprintf(buff, buff_size, "out-of-heap:%p", (void *)obj);
+    }
+#if 0 // maybe no need to check it?
+    else if (0 && rb_gc_impl_garbage_object_p(objspace, obj)) {
+        snprintf(buff, buff_size, "garbage:%p", (void *)obj);
+    }
+#endif
+    else {
+        asan_unpoisoning_object(obj) {
+            raw_obj_info(buff, buff_size, obj);
+        }
+    }
     return buff;
 }