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/cds/appcds/aotCode/AOTCodeCPUFeatureIncompatibilityTest.java
+++ b/test/hotspot/jtreg/runtime/cds/appcds/aotCode/AOTCodeCPUFeatureIncompatibilityTest.java
@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 2026, 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
+ * @summary CPU feature compatibility test for AOT Code Cache
+ * @requires vm.cds.supports.aot.code.caching
+ * @requires vm.compMode != "Xcomp" & vm.compMode != "Xint"
+ * @requires os.simpleArch == "x64" | os.simpleArch == "aarch64"
+ * @comment The test verifies AOT checks during VM startup and not code generation.
+ *          No need to run it with -Xcomp.
+ * @library /test/lib /test/setup_aot
+ * @build AOTCodeCPUFeatureIncompatibilityTest JavacBenchApp
+ * @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
+ * @run driver jdk.test.lib.helpers.ClassFileInstaller -jar app.jar
+ *             JavacBenchApp
+ *             JavacBenchApp$ClassFile
+ *             JavacBenchApp$FileManager
+ *             JavacBenchApp$SourceFile
+ * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI AOTCodeCPUFeatureIncompatibilityTest
+ */
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import jdk.test.lib.Platform;
+import jdk.test.lib.cds.CDSAppTester;
+import jdk.test.lib.process.ProcessTools;
+import jdk.test.lib.process.OutputAnalyzer;
+
+import jdk.test.whitebox.WhiteBox;
+import jdk.test.whitebox.cpuinfo.CPUInfo;
+
+public class AOTCodeCPUFeatureIncompatibilityTest {
+    public static void main(String... args) throws Exception {
+        List<String> cpuFeatures = CPUInfo.getFeatures();
+        if (Platform.isX64()) {
+            // Minimum value of UseSSE required by JVM is 2. So the production run has to be executed with UseSSE=2.
+            // To simulate the case of incmpatible SSE feature, we can run this test only on system with higher SSE level (sse3 or above).
+            if (isSSE3Supported(cpuFeatures)) {
+                testIncompatibleFeature("-XX:UseSSE=2", "sse3");
+            }
+            if (isAVXSupported(cpuFeatures)) {
+                testIncompatibleFeature("-XX:UseAVX=0", "avx");
+            }
+        }
+    }
+
+    // vmOption = command line option to disable CPU feature
+    // featureName = name of the CPU feature used by the JVM in the log messages
+    public static void testIncompatibleFeature(String vmOption, String featureName) throws Exception {
+        new CDSAppTester("AOTCodeCPUFeatureIncompatibilityTest") {
+            @Override
+            public String[] vmArgs(RunMode runMode) {
+                if (runMode == RunMode.PRODUCTION) {
+                    return new String[] {vmOption, "-Xlog:aot+codecache+init=debug"};
+                }
+                return new String[] {};
+            }
+            @Override
+            public void checkExecution(OutputAnalyzer out, RunMode runMode) throws Exception {
+                if (runMode == RunMode.ASSEMBLY) {
+                    out.shouldMatch("CPU features recorded in AOTCodeCache:.*" + featureName + ".*");
+                } else if (runMode == RunMode.PRODUCTION) {
+                    out.shouldMatch("AOT Code Cache disabled: required cpu features are missing:.*" + featureName + ".*");
+                    out.shouldContain("Unable to use AOT Code Cache");
+                }
+            }
+            @Override
+            public String classpath(RunMode runMode) {
+                return "app.jar";
+            }
+            @Override
+            public String[] appCommandLine(RunMode runMode) {
+                return new String[] {
+                    "JavacBenchApp", "10"
+                };
+            }
+        }.runAOTWorkflow("--two-step-training");
+    }
+
+    // Only used on x86-64 platform
+    static boolean isSSE3Supported(List<String> cpuFeatures) {
+        return cpuFeatures.contains("sse3");
+    }
+
+    // Only used on x86-64 platform
+    static boolean isAVXSupported(List<String> cpuFeatures) {
+        return cpuFeatures.contains("avx");
+    }
+}