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/jdk/java/io/File/SetLastModified.java
+++ b/test/jdk/java/io/File/SetLastModified.java
@ -0,0 +1,124 @@
+/*
+ * Copyright (c) 1998, 2019, 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 4091757 6652379 8177809
+   @requires os.maxMemory >= 16G
+   @summary Basic test for setLastModified method
+ */
+
+import java.io.*;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+
+
+public class SetLastModified {
+
+    private static void ck(File f, long nt, long rt) throws Exception {
+        if (rt == nt) return;
+        if ((rt / 10 == nt / 10)
+            || (rt / 100 == nt / 100)
+            || (rt / 1000 == nt / 1000)
+            || (rt / 10000 == (nt / 10000))) {
+            System.err.println(f + ": Time set to " + nt
+                               + ", rounded down by filesystem to " + rt);
+            return;
+        }
+        if ((rt / 10 == (nt + 5) / 10)
+            || (rt / 100 == (nt + 50) / 100)
+            || (rt / 1000 == (nt + 500) / 1000)
+            || (rt / 10000 == ((nt + 5000) / 10000))) {
+            System.err.println(f + ": Time set to " + nt
+                               + ", rounded up by filesystem to " + rt);
+            return;
+        }
+        throw new Exception(f + ": Time set to " + nt
+                            + ", then read as " + rt);
+    }
+
+    public static void main(String[] args) throws Exception {
+        File d = new File(System.getProperty("test.dir", "."));
+        File d2 = new File(d, "x.SetLastModified.dir");
+        File f = new File(d2, "x.SetLastModified");
+        long ot, t;
+
+        /* New time: One week ago */
+        long nt = System.currentTimeMillis() - 1000 * 60 * 60 * 24 * 7;
+
+        if (f.exists()) f.delete();
+        if (d2.exists()) d2.delete();
+        if (!d2.mkdir()) {
+            throw new Exception("Can't create test directory " + d2);
+        }
+
+        boolean threw = false;
+        try {
+            d2.setLastModified(-nt);
+        } catch (IllegalArgumentException x) {
+            threw = true;
+        }
+        if (!threw)
+            throw new Exception("setLastModified succeeded with a negative time");
+
+        ot = d2.lastModified();
+        if (ot != 0) {
+            if (d2.setLastModified(nt)) {
+                ck(d2, nt, d2.lastModified());
+                d2.setLastModified(ot);
+            } else {
+                System.err.println("Warning: setLastModified on directories "
+                                   + "not supported");
+            }
+        }
+
+        if (f.exists()) {
+            if (!f.delete())
+                throw new Exception("Can't delete test file " + f);
+        }
+        if (f.setLastModified(nt))
+            throw new Exception("Succeeded on non-existent file: " + f);
+
+        // set/check last modified on files of size 1, 1GB+1, 2GB+1, ..
+        // On Windows we only test with a tiny file as that platform doesn't
+        // support sparse files by default and so the test takes too long.
+        final long G = 1024L * 1024L * 1024L;
+        final long MAX_POSITION =
+            System.getProperty("os.name").startsWith("Windows") ? 0L : 3L*G;
+        long pos = 0L;
+        while (pos <= MAX_POSITION) {
+            try (FileChannel fc = new FileOutputStream(f).getChannel()) {
+                fc.position(pos).write(ByteBuffer.wrap("x".getBytes()));
+            }
+            ot = f.lastModified();
+            System.out.format("check with file size: %d\n", f.length());
+            if (!f.setLastModified(nt))
+                throw new Exception("setLastModified failed on file: " + f);
+            ck(f, nt, f.lastModified());
+            pos += G;
+        }
+
+        if (!f.delete()) throw new Exception("Can't delete test file " + f);
+        if (!d2.delete()) throw new Exception("Can't delete test directory " + d2);
+    }
+
+}