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/*
* Copyright (c) 2018, 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 8185582 8197989
* @summary Check the resources of Inflater, Deflater and ZipFile are always
* cleaned/released when the instance is not unreachable
* @modules java.base/java.util.zip:open java.base/jdk.internal.vm.annotation
* @library /test/lib
* @comment The test relies on the Cleaner to invoke the cleaning actions. So
* we use "othervm" to prevent any Cleaner delays that could be contributed by any
* other tests or code that might have executed on the agentvm prior to this test
* execution
* @run main/othervm TestCleaner
*/
import java.io.*;
import java.lang.reflect.*;
import java.util.*;
import java.util.concurrent.atomic.AtomicLong;
import java.util.zip.*;
import jdk.internal.vm.annotation.DontInline;
import jdk.test.lib.util.ForceGC;
import static java.nio.charset.StandardCharsets.US_ASCII;
public class TestCleaner {
public static void main(String[] args) throws Throwable {
testDeInflater();
testZipFile();
}
private static long addrOf(Object obj) {
try {
Field addr = obj.getClass().getDeclaredField("address");
if (!addr.trySetAccessible()) {
return -1;
}
return addr.getLong(obj);
} catch (Exception x) {
return -1;
}
}
// verify the "native resource" of In/Deflater has been cleaned
private static void testDeInflater() throws Throwable {
Field zsRefDef = Deflater.class.getDeclaredField("zsRef");
Field zsRefInf = Inflater.class.getDeclaredField("zsRef");
if (!zsRefDef.trySetAccessible() || !zsRefInf.trySetAccessible()) {
throw new RuntimeException("'zsRef' is not accessible");
}
if (addrOf(zsRefDef.get(new Deflater())) == -1 ||
addrOf(zsRefInf.get(new Inflater())) == -1) {
throw new RuntimeException("'addr' is not accessible");
}
List<Object> list = new ArrayList<>();
byte[] buf1 = new byte[1024];
byte[] buf2 = new byte[1024];
for (int i = 0; i < 10; i++) {
var def = new Deflater();
list.add(zsRefDef.get(def));
def.setInput("hello".getBytes());
def.finish();
int n = def.deflate(buf1);
var inf = new Inflater();
list.add(zsRefInf.get(inf));
inf.setInput(buf1, 0, n);
n = inf.inflate(buf2);
if (!"hello".equals(new String(buf2, 0, n))) {
throw new RuntimeException("compression/decompression failed");
}
}
final AtomicLong numNotYetCleaned = new AtomicLong();
// trigger GC
final boolean resourcesCleaned = ForceGC.wait(() -> {
final long remaining = list.stream().filter(o -> addrOf(o) != 0).count();
numNotYetCleaned.set(remaining);
return remaining == 0;
});
if (!resourcesCleaned) {
throw new RuntimeException(numNotYetCleaned.get()
+ " resources haven't yet been cleaned");
}
}
@DontInline
private static Object openAndCloseZipFile(File zip) throws Throwable {
try {
try (var fos = new FileOutputStream(zip);
var zos = new ZipOutputStream(fos)) {
zos.putNextEntry(new ZipEntry("hello"));
zos.write("hello".getBytes(US_ASCII));
zos.closeEntry();
}
var zf = new ZipFile(zip);
var es = zf.entries();
while (es.hasMoreElements()) {
zf.getInputStream(es.nextElement()).read();
}
Field fieldRes = ZipFile.class.getDeclaredField("res");
if (!fieldRes.trySetAccessible()) {
throw new RuntimeException("'ZipFile.res' is not accesible");
}
Object zfRes = fieldRes.get(zf);
if (zfRes == null) {
throw new RuntimeException("'ZipFile.res' is null");
}
Field fieldZsrc = zfRes.getClass().getDeclaredField("zsrc");
if (!fieldZsrc.trySetAccessible()) {
throw new RuntimeException("'ZipFile.zsrc' is not accesible");
}
return fieldZsrc.get(zfRes);
} finally {
zip.delete();
}
}
private static void testZipFile() throws Throwable {
File dir = new File(System.getProperty("test.dir", "."));
File zip = File.createTempFile("testzf", "zip", dir);
Object zsrc = openAndCloseZipFile(zip);
if (zsrc != null) {
Field zfileField = zsrc.getClass().getDeclaredField("zfile");
if (!zfileField.trySetAccessible()) {
throw new RuntimeException("'ZipFile.Source.zfile' is not accessible");
}
final boolean resourceCleaned = ForceGC.wait(() -> {
try {
return zfileField.get(zsrc) == null;
} catch (IllegalAccessException e) {
// shouldn't happen
throw new RuntimeException(e);
}
});
if (!resourceCleaned) {
throw new RuntimeException("cleaner failed to clean zipfile " + zip);
}
}
}
}
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