8277042: add test for 8276036 to compiler/codecache

Backport-of: 17e68caad727b04f5e7efde59fce960c66558504

test/hotspot/jtreg/compiler/codecache/CodeCacheFullCountTest.java

+/*
+ * Copyright (c) 2021, 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.
+ */
+
+import java.net.URL;
+import java.net.URLClassLoader;
+import java.lang.reflect.Field;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import jdk.test.lib.process.OutputAnalyzer;
+import jdk.test.lib.process.ProcessTools;
+
+/*
+ * @test
+ * @bug 8276036 8277213 8277441
+ * @summary test for the value of full_count in the message of insufficient codecache
+ * @library /test/lib
+ */
+public class CodeCacheFullCountTest {
+    public static void main(String args[]) throws Throwable {
+        if (args.length == 1) {
+            wasteCodeCache();
+        } else {
+            runTest();
+        }
+    }
+
+    public static void wasteCodeCache()  throws Exception {
+        URL url = CodeCacheFullCountTest.class.getProtectionDomain().getCodeSource().getLocation();
+
+        for (int i = 0; i < 500; i++) {
+            ClassLoader cl = new MyClassLoader(url);
+            refClass(cl.loadClass("SomeClass"));
+        }
+    }
+
+    public static void runTest() throws Throwable {
+        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
+          "-XX:ReservedCodeCacheSize=2496k", "-XX:-UseCodeCacheFlushing", "CodeCacheFullCountTest", "WasteCodeCache");
+        OutputAnalyzer oa = ProcessTools.executeProcess(pb);
+        oa.shouldHaveExitValue(0);
+        String stdout = oa.getStdout();
+
+        Pattern pattern = Pattern.compile("full_count=(\\d)");
+        Matcher stdoutMatcher = pattern.matcher(stdout);
+        if (stdoutMatcher.find()) {
+            int fullCount = Integer.parseInt(stdoutMatcher.group(1));
+            if (fullCount != 1) {
+                throw new RuntimeException("the value of full_count is wrong.");
+            }
+        } else {
+            throw new RuntimeException("codecache shortage did not occur.");
+        }
+    }
+
+    private static void refClass(Class clazz) throws Exception {
+        Field name = clazz.getDeclaredField("NAME");
+        name.setAccessible(true);
+        name.get(null);
+    }
+
+    private static class MyClassLoader extends URLClassLoader {
+        public MyClassLoader(URL url) {
+            super(new URL[]{url}, null);
+        }
+        protected Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {
+            try {
+                return super.loadClass(name, resolve);
+            } catch (ClassNotFoundException e) {
+                return Class.forName(name, resolve, CodeCacheFullCountTest.class.getClassLoader());
+            }
+        }
+    }
+}
+
+abstract class Foo {
+    public abstract int foo();
+}
+
+class Foo1 extends Foo {
+    private int a;
+    public int foo() { return a; }
+}
+
+class Foo2 extends Foo {
+    private int a;
+    public int foo() { return a; }
+}
+
+class Foo3 extends Foo {
+    private int a;
+    public int foo() { return a; }
+}
+
+class Foo4 extends Foo {
+    private int a;
+    public int foo() { return a; }
+}
+
+class SomeClass {
+    static final String NAME = "name";
+
+    static {
+        int res =0;
+        Foo[] foos = new Foo[] { new Foo1(), new Foo2(), new Foo3(), new Foo4() };
+        for (int i = 0; i < 100000; i++) {
+            res = foos[i % foos.length].foo();
+        }
+    }
+}