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8193507: [REDO] Startup regression due to JDK-8185582
Co-authored-by: Xueming Shen <xueming.shen@oracle.com> Reviewed-by: alanb, rriggs
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4 changed files with 170 additions and 121 deletions
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@ -25,6 +25,9 @@
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package java.util.zip;
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import java.lang.ref.Cleaner.Cleanable;
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import jdk.internal.ref.CleanerFactory;
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/**
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* This class provides support for general purpose decompression using the
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* popular ZLIB compression library. The ZLIB compression library was
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@ -88,7 +91,7 @@ package java.util.zip;
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public class Inflater {
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private final ZStreamRef zsRef;
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private final InflaterZStreamRef zsRef;
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private byte[] buf = defaultBuf;
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private int off, len;
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private boolean finished;
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@ -115,7 +118,7 @@ public class Inflater {
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* @param nowrap if true then support GZIP compatible compression
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*/
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public Inflater(boolean nowrap) {
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this.zsRef = ZStreamRef.get(this, () -> init(nowrap), Inflater::end);
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this.zsRef = InflaterZStreamRef.get(this, init(nowrap));
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}
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/**
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@ -428,4 +431,75 @@ public class Inflater {
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private static native int getAdler(long addr);
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private static native void reset(long addr);
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private static native void end(long addr);
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/**
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* A reference to the native zlib's z_stream structure. It also
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* serves as the "cleaner" to clean up the native resource when
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* the Inflater is ended, closed or cleaned.
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*/
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static class InflaterZStreamRef implements Runnable {
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private long address;
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private final Cleanable cleanable;
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private InflaterZStreamRef(Inflater owner, long addr) {
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this.cleanable = (owner != null) ? CleanerFactory.cleaner().register(owner, this) : null;
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this.address = addr;
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}
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long address() {
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return address;
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}
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void clean() {
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cleanable.clean();
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}
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public synchronized void run() {
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long addr = address;
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address = 0;
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if (addr != 0) {
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end(addr);
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}
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}
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/*
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* If {@code Inflater} has been subclassed and the {@code end} method is
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* overridden, uses {@code finalizer} mechanism for resource cleanup. So
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* {@code end} method can be called when the {@code Inflater} is unreachable.
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* This mechanism will be removed when the {@code finalize} method is
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* removed from {@code Inflater}.
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*/
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static InflaterZStreamRef get(Inflater owner, long addr) {
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Class<?> clz = owner.getClass();
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while (clz != Inflater.class) {
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try {
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clz.getDeclaredMethod("end");
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return new FinalizableZStreamRef(owner, addr);
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} catch (NoSuchMethodException nsme) {}
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clz = clz.getSuperclass();
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}
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return new InflaterZStreamRef(owner, addr);
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}
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private static class FinalizableZStreamRef extends InflaterZStreamRef {
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final Inflater owner;
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FinalizableZStreamRef(Inflater owner, long addr) {
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super(null, addr);
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this.owner = owner;
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}
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@Override
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void clean() {
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run();
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}
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@Override
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@SuppressWarnings("deprecation")
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protected void finalize() {
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owner.end();
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}
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}
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}
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}
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