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/patterns/ScopeResizeTest.java
+++ b/test/langtools/tools/javac/patterns/ScopeResizeTest.java
@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2022, 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 8292756
+ * @summary Verify the Scope can be safely and correctly resized to accommodate pattern binding variables
+ *          when the Scope for a guard is constructed.
+ * @library /tools/lib /tools/javac/lib
+ * @modules
+ *      jdk.compiler/com.sun.tools.javac.api
+ *      jdk.compiler/com.sun.tools.javac.file
+ *      jdk.compiler/com.sun.tools.javac.main
+ *      jdk.compiler/com.sun.tools.javac.util
+ * @build toolbox.ToolBox toolbox.JavacTask
+ * @build combo.ComboTestHelper
+ * @compile ScopeResizeTest.java
+ * @run main ScopeResizeTest
+ */
+
+import combo.ComboInstance;
+import combo.ComboParameter;
+import combo.ComboTask;
+import combo.ComboTestHelper;
+import java.util.stream.Stream;
+import toolbox.ToolBox;
+
+public class ScopeResizeTest extends ComboInstance<ScopeResizeTest> {
+    protected ToolBox tb;
+
+    ScopeResizeTest() {
+        super();
+        tb = new ToolBox();
+    }
+
+    public static void main(String... args) throws Exception {
+        int variantsSize = 17;
+        PredefinedVariables[] variants = Stream.iterate(0, i -> i + 1)
+                                               .limit(variantsSize)
+                                               .map(s -> new PredefinedVariables(s))
+                                               .toArray(s -> new PredefinedVariables[s]);
+        new ComboTestHelper<ScopeResizeTest>()
+                .withDimension("PREDEFINED_VARIABLES", (x, predefinedVariables) -> x.predefinedVariables = predefinedVariables, variants)
+                .run(ScopeResizeTest::new);
+    }
+
+    private PredefinedVariables predefinedVariables;
+
+    private static final String MAIN_TEMPLATE =
+            """
+            public class Test {
+                public static void test(Object o) {
+                    #{PREDEFINED_VARIABLES}
+                    switch (o) {
+                        case String s when s.isEmpty() -> {}
+                        default -> {}
+                    }
+                }
+            }
+            """;
+
+    @Override
+    protected void doWork() throws Throwable {
+        ComboTask task = newCompilationTask()
+                .withSourceFromTemplate(MAIN_TEMPLATE, pname -> switch (pname) {
+                        case "PREDEFINED_VARIABLES" -> predefinedVariables;
+                        default -> throw new UnsupportedOperationException(pname);
+                    });
+
+        task.analyze(result -> {});
+    }
+
+    public record PredefinedVariables(int size) implements ComboParameter {
+        @Override
+        public String expand(String optParameter) {
+            StringBuilder variables = new StringBuilder();
+            for (int i = 0; i < size(); i++) {
+                variables.append("int i" + i + ";\n");
+            }
+            return variables.toString();
+        }
+    }
+
+}