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/fatalErrors/NoJavaLangTest.java
+++ b/test/langtools/tools/javac/fatalErrors/NoJavaLangTest.java
@ -0,0 +1,112 @@
+/*
+ * Copyright (c) 2013, 2021, 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 4263768 4785453 8205187
+ * @summary Verify that the compiler does not crash when java.lang is not available
+ * @library /tools/lib
+ * @modules jdk.compiler/com.sun.tools.javac.api
+ *          jdk.compiler/com.sun.tools.javac.main
+ * @build toolbox.ToolBox toolbox.JavacTask
+ * @run main NoJavaLangTest
+ */
+
+import java.nio.file.*;
+
+import toolbox.JavacTask;
+import toolbox.Task;
+import toolbox.ToolBox;
+
+public class NoJavaLangTest  {
+
+    private static final String noJavaLangSrc =
+        "public class NoJavaLang {\n" +
+        "    private String s;\n" +
+        "\n" +
+        "    public String s() {\n" +
+        "        return s;\n" +
+        "    }\n" +
+        "}";
+
+    private static final String compilerErrorMessage =
+        "error: Unable to find package java.lang in platform classes";
+
+    public static void main(String[] args) throws Exception {
+        new NoJavaLangTest().run();
+    }
+
+    final ToolBox tb = new ToolBox();
+
+    void run() throws Exception {
+        testStandard();
+        testBootClassPath();
+        testModulePath();
+    }
+
+    // sanity check, with java.lang available
+    void testStandard() {
+        new JavacTask(tb)
+                .sources(noJavaLangSrc)
+                .run();
+    }
+
+
+    // test with bootclasspath, for as long as its around
+    void testBootClassPath() {
+        String[] bcpOpts = { "-Xlint:-options", "-source", "8", "-bootclasspath", ".", "-classpath", "." };
+        test(bcpOpts, compilerErrorMessage);
+    }
+
+    // test with module path
+    void testModulePath() throws Exception {
+        // need to ensure there is an empty java.base to avoid different error message
+        Files.createDirectories(Paths.get("modules/java.base"));
+        new JavacTask(tb)
+                .sources("module java.base { }",
+                         "package java.lang; public class Object {}")
+                .outdir("modules/java.base")
+                .run();
+
+        Files.delete(Paths.get("modules", "java.base", "java", "lang", "Object.class"));
+
+        String[] mpOpts = { "--system", "none", "--module-path", "modules" };
+        test(mpOpts, compilerErrorMessage);
+    }
+
+    private void test(String[] options, String expect) {
+        System.err.println("Testing " + java.util.Arrays.toString(options));
+
+        String out = new JavacTask(tb)
+                .options(options)
+                .sources(noJavaLangSrc)
+                .run(Task.Expect.FAIL, 1)
+                .writeAll()
+                .getOutput(Task.OutputKind.DIRECT);
+
+        if (!out.trim().startsWith(expect)) {
+            throw new AssertionError("javac generated error output is not correct");
+        }
+    }
+
+}