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/api/TestJavacTaskWithWarning.java
+++ b/test/langtools/tools/javac/api/TestJavacTaskWithWarning.java
@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 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     8348212 8349475
+ * @summary Ensure the warn() phase executes when the compiler is invoked via the API
+ * @modules jdk.compiler/com.sun.tools.javac.api
+ */
+
+import com.sun.tools.javac.api.JavacTaskImpl;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.PrintStream;
+import java.io.PrintWriter;
+import java.io.StringWriter;
+import java.util.List;
+
+import javax.tools.JavaCompiler;
+import javax.tools.JavaFileObject;
+import javax.tools.StandardJavaFileManager;
+import javax.tools.ToolProvider;
+
+public class TestJavacTaskWithWarning {
+
+    static final JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
+    static final StandardJavaFileManager fm = compiler.getStandardFileManager(null, null, null);
+
+    public static void warningTest() throws Exception {
+
+        // Create a source file that will generate a warning
+        String srcdir = ".";
+        File file = new File(srcdir, "GeneratesWarning.java");
+        try (PrintStream out = new PrintStream(new FileOutputStream(file))) {
+            out.print(
+                """
+                public class GeneratesWarning {
+                    public GeneratesWarning() {
+                        hashCode();     // generates a "this-escape" warning
+                    }
+                }
+                """);
+        }
+
+        // Compile it using API
+        Iterable<? extends JavaFileObject> files = fm.getJavaFileObjectsFromFiles(List.of(file));
+        StringWriter buf = new StringWriter();
+        List<String> options = List.of(
+          "-Xlint:this-escape",
+          "-XDrawDiagnostics"
+        );
+        JavacTaskImpl task = (JavacTaskImpl)compiler.getTask(new PrintWriter(buf), fm, null, options, null, files);
+        task.analyze();
+
+        // Verify warning was generated
+        if (!buf.toString().contains("compiler.warn.possible.this.escape"))
+            throw new AssertionError("warning not found in:\n" + buf);
+    }
+
+    public static void main(String[] args) throws Exception {
+        try {
+            warningTest();
+        } finally {
+            fm.close();
+        }
+    }
+}