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/langtools/tools/javac/defaultMethods/TestDefaultBody.java
+++ b/test/langtools/tools/javac/defaultMethods/TestDefaultBody.java
@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 2011, 2024, 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 7192246
+ * @summary  check that code attributed for default methods is correctly generated
+ */
+
+import java.lang.classfile.*;
+import java.lang.classfile.attribute.CodeAttribute;
+import java.lang.classfile.constantpool.MemberRefEntry;
+import java.lang.classfile.instruction.InvokeInstruction;
+import java.io.*;
+
+public class TestDefaultBody {
+
+    interface TestInterface {
+        int no_default(int i);
+        default int yes_default(int i) { return impl(this, i); }
+    }
+
+    static int impl(TestInterface ti, int i) { return 0; }
+
+    static final String TARGET_CLASS_NAME = "TestDefaultBody";
+    static final String TARGET_NAME = "impl";
+    static final String TARGET_TYPE = "(LTestDefaultBody$TestInterface;I)I";
+    static final String SUBTEST_NAME = TestInterface.class.getName() + ".class";
+    static final String TEST_METHOD_NAME = "yes_default";
+
+    public static void main(String... args) throws Exception {
+        new TestDefaultBody().run();
+    }
+
+    public void run() throws Exception {
+        String workDir = System.getProperty("test.classes");
+        File compiledTest = new File(workDir, SUBTEST_NAME);
+        verifyDefaultBody(compiledTest);
+    }
+
+    void verifyDefaultBody(File f) {
+        System.err.println("verify: " + f);
+        try {
+            ClassModel cf = ClassFile.of().parse(f.toPath());
+            MethodModel testMethod = null;
+            CodeAttribute codeAttr = null;
+            for (MethodModel m : cf.methods()) {
+                codeAttr = m.findAttribute(Attributes.code()).orElse(null);
+                String mname = m.methodName().stringValue();
+                if (mname.equals(TEST_METHOD_NAME)) {
+                    testMethod = m;
+                    break;
+                } else {
+                    codeAttr = null;
+                }
+            }
+            if (testMethod == null) {
+                throw new Error("Test method not found");
+            }
+            if ((testMethod.flags().flagsMask() & ClassFile.ACC_ABSTRACT) != 0) {
+                throw new Error("Test method is abstract");
+            }
+            if (codeAttr == null) {
+                throw new Error("Code attribute in test method not found");
+            }
+
+            boolean found = false;
+            for (CodeElement instr : codeAttr.elementList()) {
+                if (instr instanceof InvokeInstruction ins && ins.opcode() == Opcode.INVOKESTATIC) {
+                    found = true;
+                    MemberRefEntry mref = ins.method();
+                    String className = mref.owner().asInternalName();
+                    String targetName = mref.name().stringValue();
+                    String targetType = mref.type().stringValue();
+
+                    if (!className.equals(TARGET_CLASS_NAME)) {
+                        throw new Error("unexpected class in default method body " + className);
+                    }
+                    if (!targetName.equals(TARGET_NAME)) {
+                        throw new Error("unexpected method name in default method body " + targetName);
+                    }
+                    if (!targetType.equals(TARGET_TYPE)) {
+                        throw new Error("unexpected method type in default method body " + targetType);
+                    }
+                    break;
+                }
+            }
+
+            if (!found) {
+                throw new Error("no invokestatic found in default method body");
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+            throw new Error("error reading " + f +": " + e);
+        }
+    }
+}