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/hotspot/jtreg/runtime/NMT/NMTJavaHeapTest.java
+++ b/test/hotspot/jtreg/runtime/NMT/NMTJavaHeapTest.java
@ -0,0 +1,83 @@
+/*
+ * Copyright (c) 2023, 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 8306841
+ * @summary Sanity check Java Heap size values
+ * @modules java.base/jdk.internal.misc
+ * @library /test/lib
+ * @run driver NMTJavaHeapTest
+ */
+
+import jdk.test.lib.process.ProcessTools;
+import jdk.test.lib.Asserts;
+import jdk.test.lib.Utils;
+import jdk.test.lib.process.OutputAnalyzer;
+
+public class NMTJavaHeapTest {
+    public static void main(String args[]) throws Exception {
+        ProcessBuilder pb = ProcessTools.createTestJavaProcessBuilder(
+              "-XX:+UnlockDiagnosticVMOptions",
+              "-XX:+PrintNMTStatistics",
+              "-XX:NativeMemoryTracking=summary",
+              "-version");
+
+        OutputAnalyzer output = new OutputAnalyzer(pb.start());
+
+        // Java Heap (reserved=786432KB, committed=49152KB)
+        String pattern = ".*Java Heap \\(reserved=.*, committed=(.*)\\).*";
+        String committed = output.firstMatch(pattern, 1);
+        Asserts.assertNotNull(committed, "Couldn't find pattern '" + pattern
+                + "': in output '" + output.getOutput() + "'");
+
+        long committedBytes = committedStringToBytes(committed);
+
+        // Must be more than zero
+        Asserts.assertGT(committedBytes, 0L);
+
+        // Compare against the max heap size
+        long maxBytes = Runtime.getRuntime().maxMemory();
+        Asserts.assertLTE(committedBytes, maxBytes);
+    }
+
+    private static long K = 1024;
+    private static long M = K * 1024;
+    private static long G = M * 1024;
+
+    private static long committedStringToBytes(String committed) {
+        long multiplier = 1;
+        if (committed.endsWith("GB")) {
+            multiplier = G;
+            committed = committed.replace("GB", "");
+        } else if (committed.endsWith("MB")) {
+            multiplier = M;
+            committed = committed.replace("MB", "");
+        } else if (committed.endsWith("KB")) {
+            multiplier = K;
+            committed = committed.replace("KB", "");
+        }
+
+        return Long.parseLong(committed) * multiplier;
+    }
+}