`rp(obj)` shows func, file and line. (#2394)

rp() macro for debug also shows file location and function name
such as:

  [OBJ_INFO:rb_call_inits@inits.c:73] 0x000056147741b248 ...

1 files changed, 7 insertions, 0 deletions

diff --git a/gc.c b/gc.c
index f9b57423c1..0d7732a78e 100644
--- a/gc.c
+++ b/gc.c
@@ -11449,6 +11449,13 @@ rb_obj_info_dump(VALUE obj)
     fprintf(stderr, "rb_obj_info_dump: %s\n", rb_raw_obj_info(buff, 0x100, obj));
 }
 
+void
+rb_obj_info_dump_loc(VALUE obj, const char *file, int line, const char *func)
+{
+    char buff[0x100];
+    fprintf(stderr, "<OBJ_INFO:%s@%s:%d> %s\n", func, file, line, rb_raw_obj_info(buff, 0x100, obj));
+}
+
 #if GC_DEBUG
 
 void