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/MallocTrackingVerify.java
+++ b/test/hotspot/jtreg/runtime/NMT/MallocTrackingVerify.java
@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 2014, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, Red Hat, Inc. 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 8054836
+ * @summary Test to verify correctness of malloc tracking
+ * @key randomness
+ * @library /test/lib
+ * @modules java.base/jdk.internal.misc
+ *          java.management
+ * @build jdk.test.whitebox.WhiteBox
+ * @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
+ * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -XX:NativeMemoryTracking=summary MallocTrackingVerify
+ *
+ */
+
+import java.util.ArrayList;
+import java.util.Random;
+
+import jdk.test.lib.process.ProcessTools;
+import jdk.test.lib.process.OutputAnalyzer;
+import jdk.test.lib.JDKToolFinder;
+import jdk.test.lib.Utils;
+
+import jdk.test.whitebox.WhiteBox;
+
+public class MallocTrackingVerify {
+    private static int MAX_ALLOC = 4 * 1024;
+
+    static ArrayList<MallocMemory> mallocd_memory = new ArrayList<MallocMemory>();
+    static long mallocd_total = 0;
+    public static WhiteBox wb = WhiteBox.getWhiteBox();
+
+    public static void main(String args[]) throws Exception {
+
+        Random random = Utils.getRandomInstance();
+        // Allocate small amounts of memory with random pseudo call stack
+        while (mallocd_total < MAX_ALLOC) {
+            int size = random.nextInt(31) + 1;
+            long addr = wb.NMTMallocWithPseudoStack(size, random.nextInt());
+            if (addr != 0) {
+                MallocMemory mem = new MallocMemory(addr, size);
+                mallocd_memory.add(mem);
+                mallocd_total += size;
+            } else {
+                System.out.println("Out of malloc memory");
+                break;
+            }
+        }
+
+        NMTTestUtils.runJcmdSummaryReportAndCheckOutput(
+                "Test (reserved=4KB, committed=4KB)",
+                "(malloc=4KB tag=Test #" + mallocd_memory.size() + ") (at peak)"
+        );
+
+        // Free
+        for (MallocMemory mem : mallocd_memory) {
+            wb.NMTFree(mem.addr());
+        }
+
+        // Run 'jcmd <pid> VM.native_memory summary', check for expected output
+        NMTTestUtils.runJcmdSummaryReportAndCheckOutput(
+                "Test (reserved=0KB, committed=0KB)",
+                "(malloc=0KB tag=Test) (peak=4KB #" + + mallocd_memory.size() + ")"
+        );
+
+    }
+
+    static class MallocMemory {
+        private long addr;
+        private int size;
+
+        MallocMemory(long addr, int size) {
+            this.addr = addr;
+            this.size = size;
+        }
+
+        long addr() {
+            return this.addr;
+        }
+
+        int size() {
+            return this.size;
+        }
+    }
+}