merge revision(s) 56766,56767: [Backport #12925]

	error.c: rb_get_backtrace

	* error.c (rb_get_backtrace): move from eval_error.c to call
  exc_backtrace directly.  [ruby-core:78097] [Bug #12925]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@56786 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 20 insertions, 0 deletions

diff --git a/error.c b/error.c
index b92d886832..6b13c234b9 100644
--- a/error.c
+++ b/error.c
@@ -819,6 +819,26 @@ exc_backtrace(VALUE exc)
     return obj;
 }
 
+VALUE
+rb_get_backtrace(VALUE exc)
+{
+    ID mid;
+    CONST_ID(mid, "backtrace");
+    if (rb_method_basic_definition_p(CLASS_OF(exc), mid)) {
+	VALUE info, klass = rb_eException;
+	rb_thread_t *th = GET_THREAD();
+	if (NIL_P(exc))
+	    return Qnil;
+	EXEC_EVENT_HOOK(th, RUBY_EVENT_C_CALL, exc, mid, klass, Qundef);
+	info = exc_backtrace(exc);
+	EXEC_EVENT_HOOK(th, RUBY_EVENT_C_RETURN, exc, mid, klass, info);
+	if (NIL_P(info))
+	    return Qnil;
+	return rb_check_backtrace(info);
+    }
+    return rb_funcall(exc, mid, 0, 0);
+}
+
 /*
  *  call-seq:
  *     exception.backtrace_locations    -> array