undefect. CWE-407 — 63 sites patched across 27 ecosystems

Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com Patches, unit tests, benchmarks, whitepaper, and outreach briefs. Public domain — no copyright claimed. Use freely.
2026-03-26 17:11:57 -04:00 · 2026-03-26 17:11:57 -04:00 · 0a580b313d
commit 0a580b313d
70422 changed files with 17213626 additions and 0 deletions
--- a/test/hotspot/gtest/metaprogramming/test_enableIf.cpp
+++ b/test/hotspot/gtest/metaprogramming/test_enableIf.cpp
@ -0,0 +1,93 @@
+/*
+ * Copyright (c) 2017, 2025, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#include "cppstdlib/type_traits.hpp"
+#include "memory/allStatic.hpp"
+#include "metaprogramming/enableIf.hpp"
+#include "utilities/debug.hpp"
+#include "unittest.hpp"
+
+class EnableIfTest: AllStatic {
+  class A: AllStatic {
+  public:
+    template <bool condition>
+    static typename EnableIf<condition, char>::type test();
+    template <bool condition>
+    static typename EnableIf<!condition, long>::type test();
+  };
+
+  static const bool A_test_true_is_char = sizeof(A::test<true>()) == sizeof(char);
+  STATIC_ASSERT(A_test_true_is_char);
+
+  static const bool A_test_false_is_long = sizeof(A::test<false>()) == sizeof(long);
+  STATIC_ASSERT(A_test_false_is_long);
+};
+
+template<typename T, ENABLE_IF(std::is_integral<T>::value)>
+static T sub1(T x) { return x - 1; }
+
+TEST(TestEnableIf, one_decl_and_def) {
+  EXPECT_EQ(15, sub1(16));
+}
+
+template<typename T, ENABLE_IF(std::is_integral<T>::value)>
+static T sub2(T x);
+
+template<typename T, ENABLE_IF_SDEFN(std::is_integral<T>::value)>
+T sub2(T x) { return x - 2; }
+
+TEST(TestEnableIf, separate_decl_and_def) {
+  EXPECT_EQ(14, sub2(16));
+}
+
+template<typename T>
+struct TestEnableIfNested {
+  template<typename U, ENABLE_IF(std::is_integral<U>::value)>
+  static U sub1(U x);
+};
+
+template<typename T>
+template<typename U, ENABLE_IF_SDEFN(std::is_integral<U>::value)>
+U TestEnableIfNested<T>::sub1(U x) { return x - 1; }
+
+TEST(TestEnableIf, nested_separate_decl_and_def) {
+  EXPECT_EQ(15, TestEnableIfNested<void>::sub1(16));
+}
+
+// Demonstrate workaround for non-dependent condition.
+template<typename T>
+struct TestEnableIfNonDependent {
+  // Dependent is used to make the ENABLE_IF condition dependent on
+  // the type parameters for this function.
+  template<typename Dependent = T, ENABLE_IF(std::is_same<int, Dependent>::value)>
+  static T value() { return T{}; }
+  static int instantiate() { return 5; }
+};
+
+TEST(TestEnableIf, non_dependent) {
+  EXPECT_EQ(int{}, TestEnableIfNonDependent<int>::value());
+  // This fails to compile if the ENABLE_IF for value() directly uses
+  // T rather than indirectly via Dependent.
+  EXPECT_EQ(5, TestEnableIfNonDependent<void>::instantiate());
+}