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.

test/jdk/java/lang/invoke/8177146/TestMethodHandleBind.java

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+/*
+ * 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.
+ */
+
+/* @test
+ * @bug 8177146
+ * @run junit/othervm TestMethodHandleBind
+ */
+
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodType;
+
+import static java.lang.invoke.MethodHandles.lookup;
+
+import static org.junit.jupiter.api.Assertions.*;
+import org.junit.jupiter.api.Test;
+
+public class TestMethodHandleBind extends pkg.A {
+    static class B extends TestMethodHandleBind {}
+
+    @Test
+    public void testInstanceOfCallerClass() throws Throwable {
+        MethodHandle bound = lookup().bind(new TestMethodHandleBind() , "m1", MethodType.methodType(String.class));
+        String x = (String)bound.invoke();
+        assertEquals(this.getClass().getSimpleName(), x);
+    }
+
+    @Test
+    public void testInstanceOfCallerSubclass() throws Throwable {
+        MethodHandle bound = lookup().bind(new B() , "m1", MethodType.methodType(String.class));
+        // MethodHandle bound = lookup().findVirtual(B.class,  "m1", MethodType.methodType(String.class)).bindTo(new B());
+        String x = (String)bound.invoke();
+        assertEquals("B", x);
+    }
+
+    @Test
+    public void testInstanceOfReceiverClass() throws Throwable {
+        assertThrows(IllegalAccessException.class, () -> lookup().bind(new pkg.A() , "m1", MethodType.methodType(String.class)));
+    }
+
+    @Test
+    public void testPublicMethod() throws Throwable {
+        MethodHandle bound = lookup().bind(new pkg.A() , "m2", MethodType.methodType(String.class));
+        String x = (String)bound.invoke();
+        assertEquals("A", x);
+    }
+
+    @Test
+    public void testPublicMethod2() throws Throwable {
+        MethodHandle bound = lookup().bind(new TestMethodHandleBind(), "m2", MethodType.methodType(String.class));
+        String x = (String)bound.invoke();
+        assertEquals(this.getClass().getSimpleName(), x);
+    }
+
+    @Test
+    public void testInstanceOfCallerClassVarargs() throws Throwable {
+        MethodHandle bound = lookup().bind(new TestMethodHandleBind() , "m3", MethodType.methodType(String.class, String[].class));
+        String x = (String)bound.invoke("a", "b", "c");
+        assertEquals(this.getClass().getSimpleName() + "abc", x);
+    }
+
+    @Test
+    public void testInstanceOfReceiverClassVarargs() throws Throwable {
+        assertThrows(IllegalAccessException.class, () -> lookup().bind(new pkg.A(), "m3", MethodType.methodType(String.class, String[].class)));
+    }
+}