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/*
* 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.
*/
/**
* @test
* @bug 8048190
* @summary Test that the NCDFE saves the stack trace for the original exception
* during class initialization with ExceptionInInitializationError,
* and doesn't prevent the classes in the stacktrace to be unloaded.
* @requires vm.opt.final.ClassUnloading
* @modules java.base/jdk.internal.misc
* @library /test/lib
* @build jdk.test.whitebox.WhiteBox
* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
* @run main/othervm -Xbootclasspath/a:. -Xmn8m -XX:+UnlockDiagnosticVMOptions -Xlog:class+unload -XX:+WhiteBoxAPI InitExceptionUnloadTest
*/
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.util.Set;
import java.util.List;
import jdk.test.whitebox.WhiteBox;
import jdk.test.lib.classloader.ClassUnloadCommon;
public class InitExceptionUnloadTest {
static public class ThrowsRuntimeException { static int x = 1/0; }
static public class ThrowsError { static { if (true) throw new Error(); } }
static public class SpecialException extends RuntimeException {
SpecialException(int count, String message) {
super(message + count);
}
}
static public class ThrowsSpecialException {
static {
if (true) throw new SpecialException(3, "Very Special ");
}
}
static public class ThrowsOOM {
static {
if (true) {
// Actually getting an OOM might be fragile but it was tested.
throw new OutOfMemoryError("Java heap space");
}
}
}
private static void verify_stack(Throwable e, String expected, String cause) throws Exception {
ByteArrayOutputStream byteOS = new ByteArrayOutputStream();
PrintStream printStream = new PrintStream(byteOS);
e.printStackTrace(printStream);
printStream.close();
String stackTrace = byteOS.toString("ASCII");
if (!stackTrace.contains(expected) || (cause != null && !stackTrace.contains(cause))) {
throw new RuntimeException(expected + " and " + cause + " missing from stacktrace");
}
}
static String[] expected = new String[] {
"java.lang.ExceptionInInitializerError",
"Caused by: java.lang.ArithmeticException: / by zero",
"java.lang.NoClassDefFoundError: Could not initialize class InitExceptionUnloadTest$ThrowsRuntimeException",
"Caused by: java.lang.ExceptionInInitializerError: Exception java.lang.ArithmeticException: / by zero [in thread",
"java.lang.Error",
null,
"java.lang.NoClassDefFoundError: Could not initialize class InitExceptionUnloadTest$ThrowsError",
"Caused by: java.lang.ExceptionInInitializerError: Exception java.lang.Error [in thread",
"java.lang.ExceptionInInitializerError",
"Caused by: InitExceptionUnloadTest$SpecialException: Very Special 3",
"java.lang.NoClassDefFoundError: Could not initialize class InitExceptionUnloadTest$ThrowsSpecialException",
"Caused by: java.lang.ExceptionInInitializerError: Exception InitExceptionUnloadTest$SpecialException: Very Special 3",
"java.lang.OutOfMemoryError",
"Java heap space",
"java.lang.NoClassDefFoundError: Could not initialize class InitExceptionUnloadTest$ThrowsOOM",
"Caused by: java.lang.ExceptionInInitializerError: Exception java.lang.OutOfMemoryError: Java heap space [in thread"
};
static String[] classNames = new String[] {
"InitExceptionUnloadTest$ThrowsRuntimeException",
"InitExceptionUnloadTest$ThrowsError",
"InitExceptionUnloadTest$ThrowsSpecialException",
"InitExceptionUnloadTest$ThrowsOOM" };
public static WhiteBox wb = WhiteBox.getWhiteBox();
static void test() throws Throwable {
ClassLoader cl = ClassUnloadCommon.newClassLoader();
int i = 0;
for (String className : classNames) {
for (int tries = 2; tries-- > 0; ) {
System.err.println("--- try to load " + className);
try {
Class<?> c = cl.loadClass(className);
Object inst = c.newInstance();
} catch (Throwable t) {
t.printStackTrace();
System.err.println();
System.err.println("Check results");
verify_stack(t, expected[i], expected[i+1]);
i += 2;
System.err.println();
}
}
}
cl = null;
Set<String> aliveClasses = ClassUnloadCommon.triggerUnloading(List.of(classNames));
ClassUnloadCommon.failIf(!aliveClasses.isEmpty(), "should be unloaded: " + aliveClasses);
}
public static void main(java.lang.String[] unused) throws Throwable {
test();
test();
}
}
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