vm_method.c: show respond_to location

* proc.c (rb_method_entry_location, rb_{mod,obj}_method_location): new
  functions to obtain source location of method definition.
* vm_method.c (rb_obj_respond_to): show the location of old style
  respond_to? method.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39089 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,11 @@
+Wed Feb  6 13:35:20 2013  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* proc.c (rb_method_entry_location, rb_{mod,obj}_method_location): new
+	  functions to obtain source location of method definition.
+
+	* vm_method.c (rb_obj_respond_to): show the location of old style
+	  respond_to? method.
+
 Wed Feb  6 13:03:00 2013  Zachary Scott  <zachary@zacharyscott.net>
 
 	* doc/security.rdoc: Add link to CVEs on ruby-lang.org/en/security

method.h

@@ -126,6 +126,10 @@ int rb_method_entry_arity(const rb_method_entry_t *me);
 int rb_method_entry_eq(const rb_method_entry_t *m1, const rb_method_entry_t *m2);
 st_index_t rb_hash_method_entry(st_index_t hash, const rb_method_entry_t *me);
 
+VALUE rb_method_entry_location(rb_method_entry_t *me);
+VALUE rb_mod_method_location(VALUE mod, ID id);
+VALUE rb_obj_method_location(VALUE obj, ID id);
+
 void rb_mark_method_entry(const rb_method_entry_t *me);
 void rb_free_method_entry(rb_method_entry_t *me);
 void rb_sweep_method_entry(void *vm);

proc.c

@@ -1844,6 +1844,37 @@ rb_method_get_iseq(VALUE method)
     return method_get_iseq(method_get_def(method));
 }
 
+static VALUE
+method_def_location(rb_method_definition_t *def)
+{
+    if (def->type == VM_METHOD_TYPE_ATTRSET || def->type == VM_METHOD_TYPE_IVAR) {
+	if (!def->body.attr.location)
+	    return Qnil;
+	return rb_ary_dup(def->body.attr.location);
+    }
+    return iseq_location(method_get_iseq(def));
+}
+
+VALUE
+rb_method_entry_location(rb_method_entry_t *me)
+{
+    if (!me || !me->def) return Qnil;
+    return method_def_location(me->def);
+}
+
+VALUE
+rb_mod_method_location(VALUE mod, ID id)
+{
+    rb_method_entry_t *me = original_method_entry(mod, id);
+    return rb_method_entry_location(me);
+}
+
+VALUE
+rb_obj_method_location(VALUE obj, ID id)
+{
+    return rb_mod_method_location(CLASS_OF(obj), id);
+}
+
 /*
  * call-seq:
  *    meth.source_location  -> [String, Fixnum]
@@ -1856,12 +1887,7 @@ VALUE
 rb_method_location(VALUE method)
 {
     rb_method_definition_t *def = method_get_def(method);
-    if (def->type == VM_METHOD_TYPE_ATTRSET || def->type == VM_METHOD_TYPE_IVAR) {
-	if (!def->body.attr.location)
-	    return Qnil;
-	return rb_ary_dup(def->body.attr.location);
-    }
-    return iseq_location(method_get_iseq(def));
+    return method_def_location(def);
 }
 
 /*

vm_method.c

@@ -1529,13 +1529,22 @@ rb_obj_respond_to(VALUE obj, ID id, int priv)
 	    if (rb_obj_method_arity(obj, idRespond_to) != 1) {
 		argc = 2;
 	    }
-	    else {
+	    else if (!NIL_P(ruby_verbose)) {
 		VALUE klass = CLASS_OF(obj);
+		VALUE location = rb_mod_method_location(klass, idRespond_to);
 		rb_warn("%"PRIsVALUE"%c""respond_to?(:%"PRIsVALUE") is"
 			" old fashion which takes only one parameter",
 			(FL_TEST(klass, FL_SINGLETON) ? obj : klass),
 			(FL_TEST(klass, FL_SINGLETON) ? '.' : '#'),
 			QUOTE_ID(id));
+		if (!NIL_P(location)) {
+		    VALUE path = RARRAY_PTR(location)[0];
+		    VALUE line = RARRAY_PTR(location)[1];
+		    if (!NIL_P(path)) {
+			rb_compile_warn(RSTRING_PTR(path), NUM2INT(line),
+					"respond_to? is defined here");
+		    }
+		}
 	    }
 	}
 	return RTEST(rb_funcall2(obj, idRespond_to, argc,  args));