8359436: AOTCompileEagerly should not be diagnostic

Reviewed-by: kvn
Backport-of: e138297

Author: shipilev

src/hotspot/share/cds/cds_globals.hpp

@@ -147,7 +147,7 @@
   product(bool, AOTVerifyTrainingData, trueInDebug, DIAGNOSTIC,             \
           "Verify archived training data")                                  \
                                                                             \
-  product(bool, AOTCompileEagerly, false, DIAGNOSTIC,                       \
+  product(bool, AOTCompileEagerly, false, EXPERIMENTAL,                     \
           "Compile methods as soon as possible")                            \
                                                                             \
   /* AOT Code flags */                                                      \

test/hotspot/jtreg/runtime/cds/appcds/aotCache/AOTCompileEagerly.java

@@ -0,0 +1,102 @@
+/*
+ * 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 8359436
+ * @summary Sanity-check that eager compilation flags are accepted
+ * @requires vm.cds
+ * @requires vm.flagless
+ * @library /test/lib /test/hotspot/jtreg/runtime/cds/appcds/test-classes
+ * @build Hello
+ * @run driver jdk.test.lib.helpers.ClassFileInstaller -jar hello.jar Hello
+ * @run driver AOTCompileEagerly
+ */
+
+import java.io.File;
+import jdk.test.lib.cds.CDSTestUtils;
+import jdk.test.lib.helpers.ClassFileInstaller;
+import jdk.test.lib.process.OutputAnalyzer;
+import jdk.test.lib.process.ProcessTools;
+
+public class AOTCompileEagerly {
+    static final String appJar = ClassFileInstaller.getJarPath("hello.jar");
+    static final String aotConfigFile = "hello.aotconfig";
+    static final String aotCacheFile = "hello.aot";
+    static final String helloClass = "Hello";
+
+    public static void main(String[] args) throws Exception {
+        ProcessBuilder pb;
+        OutputAnalyzer out;
+
+        //----------------------------------------------------------------------
+        System.out.println("Training Run");
+        pb = ProcessTools.createLimitedTestJavaProcessBuilder(
+            "-XX:AOTMode=record",
+            "-XX:AOTConfiguration=" + aotConfigFile,
+            "-cp", appJar, helloClass);
+
+        out = CDSTestUtils.executeAndLog(pb, "train");
+        out.shouldHaveExitValue(0);
+
+        //----------------------------------------------------------------------
+        System.out.println("Assembly Phase");
+        pb = ProcessTools.createLimitedTestJavaProcessBuilder(
+            "-XX:AOTMode=create",
+            "-XX:AOTConfiguration=" + aotConfigFile,
+            "-XX:AOTCache=" + aotCacheFile,
+            "-cp", appJar);
+        out = CDSTestUtils.executeAndLog(pb, "asm");
+        out.shouldHaveExitValue(0);
+
+        //----------------------------------------------------------------------
+        System.out.println("Production Run with AOTCache defaults");
+        pb = ProcessTools.createLimitedTestJavaProcessBuilder(
+            "-XX:AOTCache=" + aotCacheFile,
+            "-cp", appJar, helloClass);
+        out = CDSTestUtils.executeAndLog(pb, "prod-default");
+        out.shouldHaveExitValue(0);
+
+        //----------------------------------------------------------------------
+        System.out.println("Production Run with AOTCache and eager compilation explicitly ON");
+        pb = ProcessTools.createLimitedTestJavaProcessBuilder(
+            "-XX:AOTCache=" + aotCacheFile,
+            "-XX:+UnlockExperimentalVMOptions",
+            "-XX:+AOTCompileEagerly",
+            "-cp", appJar, helloClass);
+        out = CDSTestUtils.executeAndLog(pb, "prod-eager-on");
+        out.shouldHaveExitValue(0);
+
+        //----------------------------------------------------------------------
+        System.out.println("Production Run with AOTCache and eager compilation explicitly OFF");
+        pb = ProcessTools.createLimitedTestJavaProcessBuilder(
+            "-XX:AOTCache=" + aotCacheFile,
+            "-XX:+UnlockExperimentalVMOptions",
+            "-XX:-AOTCompileEagerly",
+            "-cp", appJar, helloClass);
+        out = CDSTestUtils.executeAndLog(pb, "prod-eager-off");
+        out.shouldHaveExitValue(0);
+    }
+}