test for [Bug #12670]

heap corruption by deferred free.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59116 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 24 insertions, 0 deletions

diff --git a/ext/-test-/typeddata/typeddata.c b/ext/-test-/typeddata/typeddata.c
index 1c5d677713..ae060960cd 100644
--- a/ext/-test-/typeddata/typeddata.c
+++ b/ext/-test-/typeddata/typeddata.c
@@ -2,19 +2,43 @@
 
 static const rb_data_type_t test_data = {
     "typed_data",
+    {NULL, ruby_xfree, NULL},
+    NULL, NULL,
+    0/* deferred free */,
 };
 
 static VALUE
+test_alloc(VALUE klass)
+{
+    char *p;
+    return TypedData_Make_Struct(klass, char, &test_data, p);
+}
+
+static VALUE
 test_check(VALUE self, VALUE obj)
 {
     rb_check_typeddata(obj, &test_data);
     return obj;
 }
 
+static VALUE
+test_make(VALUE klass, VALUE num)
+{
+    unsigned long i, n = NUM2UINT(num);
+
+    for (i = 0; i < n; i++) {
+	test_alloc(klass);
+    }
+
+    return Qnil;
+}
+
 void
 Init_typeddata(void)
 {
     VALUE mBug = rb_define_module("Bug");
     VALUE klass = rb_define_class_under(mBug, "TypedData", rb_cData);
+    rb_define_alloc_func(klass, test_alloc);
     rb_define_singleton_method(klass, "check", test_check, 1);
+    rb_define_singleton_method(klass, "make", test_make, 1);
 }