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/*
* Copyright (c) 2021, 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.
*/
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
* @requires vm.compMode != "Xint"
* @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 Throwable {
URL url = CodeCacheFullCountTest.class.getProtectionDomain().getCodeSource().getLocation();
try {
for (int i = 0; i < 500; i++) {
ClassLoader cl = new MyClassLoader(url);
refClass(cl.loadClass("SomeClass"));
}
} catch (Throwable t) {
// Expose the root cause of the Throwable instance.
while (t.getCause() != null) {
t = t.getCause();
}
throw t;
}
}
public static void runTest() throws Throwable {
ProcessBuilder pb = ProcessTools.createTestJavaProcessBuilder(
"-XX:ReservedCodeCacheSize=2496k", "-XX:-UseCodeCacheFlushing", "-XX:-MethodFlushing", "CodeCacheFullCountTest", "WasteCodeCache");
OutputAnalyzer oa = ProcessTools.executeProcess(pb);
// Ignore adapter creation failures
if (oa.getExitValue() != 0 && !oa.getOutput().contains("Out of space in CodeCache")) {
oa.reportDiagnosticSummary();
throw new RuntimeException("VM finished with exit code " + oa.getExitValue());
}
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 == 0) {
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();
}
}
}
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