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8278065: Refactor subclassAudits to use ClassValue

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Reviewed-by: rriggs, plevart
This commit is contained in:
Roman Kennke 2022-01-12 13:47:25 +00:00
parent f54ce84474
commit 8fed8ab29c
3 changed files with 16 additions and 103 deletions
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26
src/java.base/share/classes/java/io/ObjectOutputStream.java
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@ -25,8 +25,6 @@
package java.io;
import java.io.ObjectStreamClass.WeakClassKey;
import java.lang.ref.ReferenceQueue;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.ArrayList;
@ -34,9 +32,6 @@ import java.util.Arrays;
import java.util.List;
import java.util.Objects;
import java.util.StringJoiner;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import static java.io.ObjectStreamClass.processQueue;
import sun.reflect.misc.ReflectUtil;
/**
@ -177,12 +172,13 @@ public class ObjectOutputStream
private static class Caches {
/** cache of subclass security audit results */
static final ConcurrentMap<WeakClassKey,Boolean> subclassAudits =
new ConcurrentHashMap<>();
/** queue for WeakReferences to audited subclasses */
static final ReferenceQueue<Class<?>> subclassAuditsQueue =
new ReferenceQueue<>();
static final ClassValue<Boolean> subclassAudits =
new ClassValue<>() {
@Override
protected Boolean computeValue(Class<?> type) {
return auditSubclass(type);
}
};
}
/** filter stream for handling block data conversion */
@ -1065,13 +1061,7 @@ public class ObjectOutputStream
if (sm == null) {
return;
}
processQueue(Caches.subclassAuditsQueue, Caches.subclassAudits);
WeakClassKey key = new WeakClassKey(cl, Caches.subclassAuditsQueue);
Boolean result = Caches.subclassAudits.get(key);
if (result == null) {
result = auditSubclass(cl);
Caches.subclassAudits.putIfAbsent(key, result);
}
boolean result = Caches.subclassAudits.get(cl);
if (!result) {
sm.checkPermission(SUBCLASS_IMPLEMENTATION_PERMISSION);
}