From 7590fffae62f5a4157ab7612c186b442c81d5682 Mon Sep 17 00:00:00 2001
Date: Thu, 21 Sep 2023 15:15:39 +0800
Subject: add 8142508-To-bring-j.u.z.ZipFile-s-native-implementati

---
 jdk/make/mapfiles/libzip/mapfile-vers         |  23 +-
 jdk/make/mapfiles/libzip/reorder-sparc        |  17 -
 jdk/make/mapfiles/libzip/reorder-sparcv9      |  16 -
 jdk/make/mapfiles/libzip/reorder-x86          |  19 -
 .../share/classes/java/util/jar/JarFile.java  |   5 +-
 .../share/classes/java/util/zip/ZipCoder.java |  21 +-
 .../share/classes/java/util/zip/ZipFile.java  | 933 ++++++++++++++----
 .../share/classes/java/util/zip/ZipUtils.java |  79 +-
 .../sun/misc/JavaUtilZipFileAccess.java       |   1 +
 jdk/src/share/classes/sun/misc/VM.java        |   3 -
 jdk/src/share/native/java/util/zip/ZipFile.c  | 403 --------
 jdk/src/share/native/java/util/zip/zip_util.c |  29 +-
 jdk/src/share/native/java/util/zip/zip_util.h |   1 -
 jdk/test/java/nio/file/spi/TestProvider.java  | 274 ++++-
 .../java/util/zip/ZipFile/TestZipFile.java    | 375 +++++++
 .../imageio/plugins/png/ItxtUtf8Test.java     |   2 +-
 16 files changed, 1440 insertions(+), 761 deletions(-)
 delete mode 100644 jdk/src/share/native/java/util/zip/ZipFile.c
 create mode 100644 jdk/test/java/util/zip/ZipFile/TestZipFile.java

diff --git a/jdk/make/mapfiles/libzip/mapfile-vers b/jdk/make/mapfiles/libzip/mapfile-vers
index 5d33990c3..e7394ae61 100644
--- a/jdk/make/mapfiles/libzip/mapfile-vers
+++ b/jdk/make/mapfiles/libzip/mapfile-vers
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 1997, 2015, 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
@@ -27,7 +27,6 @@
 
 SUNWprivate_1.1 {
 	global:
-		Java_java_util_jar_JarFile_getMetaInfEntryNames;
 		Java_java_util_zip_Adler32_update;
 		Java_java_util_zip_Adler32_updateBytes;
 		Java_java_util_zip_Adler32_updateByteBuffer;
@@ -48,26 +47,6 @@ SUNWprivate_1.1 {
 		Java_java_util_zip_Inflater_initIDs;
 		Java_java_util_zip_Inflater_reset;
 		Java_java_util_zip_Inflater_setDictionary;
-		Java_java_util_zip_ZipFile_close;
-		Java_java_util_zip_ZipFile_getCommentBytes;
-		Java_java_util_zip_ZipFile_freeEntry;
-		Java_java_util_zip_ZipFile_getEntry;
-		Java_java_util_zip_ZipFile_getEntryBytes;
-		Java_java_util_zip_ZipFile_getEntryCrc;
-		Java_java_util_zip_ZipFile_getEntryCSize;
-		Java_java_util_zip_ZipFile_getEntryFlag;
-		Java_java_util_zip_ZipFile_getEntryMethod;
-		Java_java_util_zip_ZipFile_getEntrySize;
-		Java_java_util_zip_ZipFile_getEntryTime;
-		Java_java_util_zip_ZipFile_getNextEntry;
-		Java_java_util_zip_ZipFile_getZipMessage;
-		Java_java_util_zip_ZipFile_getTotal;
-		Java_java_util_zip_ZipFile_initIDs;
-		Java_java_util_zip_ZipFile_open;
-		Java_java_util_zip_ZipFile_read;
-		Java_java_util_zip_ZipFile_startsWithLOC;
-		Java_java_util_zip_ZipFile_getManifestNum;
-
 		ZIP_Close;
 		ZIP_CRC32;
 		ZIP_FindEntry;
diff --git a/jdk/make/mapfiles/libzip/reorder-sparc b/jdk/make/mapfiles/libzip/reorder-sparc
index 9d3aae88e..b1957dce7 100644
--- a/jdk/make/mapfiles/libzip/reorder-sparc
+++ b/jdk/make/mapfiles/libzip/reorder-sparc
@@ -15,31 +15,14 @@ text: .text%ZIP_GetEntry;
 text: .text%ZIP_Lock;
 text: .text%ZIP_Unlock;
 text: .text%ZIP_FreeEntry;
-text: .text%Java_java_util_zip_ZipFile_initIDs;
-text: .text%Java_java_util_zip_ZipFile_open;
-text: .text%Java_java_util_zip_ZipFile_getTotal;
-text: .text%Java_java_util_zip_ZipFile_startsWithLOC;
-text: .text%Java_java_util_zip_ZipFile_getManifestNum;
-text: .text%Java_java_util_zip_ZipFile_getEntry;
-text: .text%Java_java_util_zip_ZipFile_freeEntry;
-text: .text%Java_java_util_zip_ZipFile_getEntryTime;
-text: .text%Java_java_util_zip_ZipFile_getEntryCrc;
-text: .text%Java_java_util_zip_ZipFile_getEntryCSize;
-text: .text%Java_java_util_zip_ZipFile_getEntrySize;
-text: .text%Java_java_util_zip_ZipFile_getEntryFlag;
-text: .text%Java_java_util_zip_ZipFile_getEntryMethod;
-text: .text%Java_java_util_zip_ZipFile_getEntryBytes;
 text: .text%Java_java_util_zip_Inflater_initIDs;
 text: .text%Java_java_util_zip_Inflater_init;
 text: .text%inflateInit2_;
 text: .text%zcalloc;
 text: .text%Java_java_util_zip_Inflater_inflateBytes;
-text: .text%Java_java_util_zip_ZipFile_read;
 text: .text%ZIP_Read;
 text: .text%zcfree;
-text: .text%Java_java_util_jar_JarFile_getMetaInfEntryNames;
 text: .text%Java_java_util_zip_Inflater_reset;
 text: .text%Java_java_util_zip_Inflater_end;
 text: .text%inflateEnd;
-text: .text%Java_java_util_zip_ZipFile_close;
 text: .text%ZIP_Close;
diff --git a/jdk/make/mapfiles/libzip/reorder-sparcv9 b/jdk/make/mapfiles/libzip/reorder-sparcv9
index bf127e9cf..458d4c34f 100644
--- a/jdk/make/mapfiles/libzip/reorder-sparcv9
+++ b/jdk/make/mapfiles/libzip/reorder-sparcv9
@@ -15,20 +15,6 @@ text: .text%ZIP_Lock;
 text: .text%readLOC: OUTPUTDIR/zip_util.o;
 text: .text%ZIP_Unlock;
 text: .text%ZIP_FreeEntry;
-text: .text%Java_java_util_zip_ZipFile_initIDs;
-text: .text%Java_java_util_zip_ZipFile_open;
-text: .text%Java_java_util_zip_ZipFile_getTotal;
-text: .text%Java_java_util_zip_ZipFile_startsWithLOC;
-text: .text%Java_java_util_zip_ZipFile_getManifestNum;
-text: .text%Java_java_util_zip_ZipFile_getEntry;
-text: .text%Java_java_util_zip_ZipFile_freeEntry;
-text: .text%Java_java_util_zip_ZipFile_getEntryTime;
-text: .text%Java_java_util_zip_ZipFile_getEntryCrc;
-text: .text%Java_java_util_zip_ZipFile_getEntryCSize;
-text: .text%Java_java_util_zip_ZipFile_getEntrySize;
-text: .text%Java_java_util_zip_ZipFile_getEntryFlag;
-text: .text%Java_java_util_zip_ZipFile_getEntryMethod;
-text: .text%Java_java_util_zip_ZipFile_getEntryBytes;
 text: .text%Java_java_util_zip_Inflater_initIDs;
 text: .text%Java_java_util_zip_Inflater_init;
 text: .text%inflateInit2_;
@@ -36,7 +22,6 @@ text: .text%zcalloc;
 text: .text%inflateReset;
 text: .text%Java_java_util_zip_Inflater_inflateBytes;
 text: .text%inflate;
-text: .text%Java_java_util_zip_ZipFile_read;
 text: .text%ZIP_Read;
 text: .text%huft_build: OUTPUTDIR/inftrees.o;
 text: .text%zcfree;
@@ -45,6 +30,5 @@ text: .text%ZIP_ReadEntry;
 text: .text%InflateFully;
 text: .text%inflateEnd;
 text: .text%Java_java_util_zip_Inflater_reset;
-text: .text%Java_java_util_zip_ZipFile_close;
 text: .text%ZIP_Close;
 text: .text%Java_java_util_zip_Inflater_end;
diff --git a/jdk/make/mapfiles/libzip/reorder-x86 b/jdk/make/mapfiles/libzip/reorder-x86
index d4e84c38c..62f11a990 100644
--- a/jdk/make/mapfiles/libzip/reorder-x86
+++ b/jdk/make/mapfiles/libzip/reorder-x86
@@ -16,36 +16,17 @@ text: .text%ZIP_Lock;
 text: .text%readLOC: OUTPUTDIR/zip_util.o;
 text: .text%ZIP_Unlock;
 text: .text%ZIP_FreeEntry;
-text: .text%Java_java_util_zip_ZipFile_initIDs;
-text: .text%Java_java_util_zip_ZipFile_open;
-text: .text%Java_java_util_zip_ZipFile_getTotal;
-text: .text%Java_java_util_zip_ZipFile_startsWithLOC;
-text: .text%Java_java_util_zip_ZipFile_getManifestNum;
-text: .text%Java_java_util_zip_ZipFile_getEntry;
-text: .text%Java_java_util_zip_ZipFile_freeEntry;
-text: .text%Java_java_util_zip_ZipFile_getEntryTime;
-text: .text%Java_java_util_zip_ZipFile_getEntryCrc;
-text: .text%Java_java_util_zip_ZipFile_getEntryCSize;
-text: .text%Java_java_util_zip_ZipFile_getEntrySize;
-text: .text%Java_java_util_zip_ZipFile_getEntryFlag;
-text: .text%Java_java_util_zip_ZipFile_getEntryMethod;
-text: .text%Java_java_util_zip_ZipFile_getEntryBytes;
-text: .text%Java_java_util_zip_Inflater_initIDs;
-text: .text%Java_java_util_zip_Inflater_init;
 text: .text%inflateInit2_;
 text: .text%zcalloc;
 text: .text%inflateReset;
 text: .text%Java_java_util_zip_Inflater_inflateBytes;
 text: .text%inflate;
-text: .text%Java_java_util_zip_ZipFile_read;
 text: .text%ZIP_Read;
 text: .text%huft_build: OUTPUTDIR/inftrees.o;
 text: .text%zcfree;
-text: .text%Java_java_util_jar_JarFile_getMetaInfEntryNames;
 text: .text%ZIP_ReadEntry;
 text: .text%InflateFully;
 text: .text%inflateEnd;
 text: .text%Java_java_util_zip_Inflater_reset;
-text: .text%Java_java_util_zip_ZipFile_close;
 text: .text%ZIP_Close;
 text: .text%Java_java_util_zip_Inflater_end;
diff --git a/jdk/src/share/classes/java/util/jar/JarFile.java b/jdk/src/share/classes/java/util/jar/JarFile.java
index a26dcc4a1..2878e175e 100644
--- a/jdk/src/share/classes/java/util/jar/JarFile.java
+++ b/jdk/src/share/classes/java/util/jar/JarFile.java
@@ -213,7 +213,10 @@ class JarFile extends ZipFile {
         return man;
     }
 
-    private native String[] getMetaInfEntryNames();
+    private String[] getMetaInfEntryNames() {
+        return sun.misc.SharedSecrets.getJavaUtilZipFileAccess()
+                                              .getMetaInfEntryNames((ZipFile)this);
+    }
 
     /**
      * Returns the <code>JarEntry</code> for the given entry name or
diff --git a/jdk/src/share/classes/java/util/zip/ZipCoder.java b/jdk/src/share/classes/java/util/zip/ZipCoder.java
index b920b820e..243d6e8c0 100644
--- a/jdk/src/share/classes/java/util/zip/ZipCoder.java
+++ b/jdk/src/share/classes/java/util/zip/ZipCoder.java
@@ -43,7 +43,7 @@ import sun.nio.cs.ArrayEncoder;
 
 final class ZipCoder {
 
-    String toString(byte[] ba, int length) {
+    String toString(byte[] ba, int off, int length) {
         CharsetDecoder cd = decoder().reset();
         int len = (int)(length * cd.maxCharsPerByte());
         char[] ca = new char[len];
@@ -53,12 +53,12 @@ final class ZipCoder {
         // CodingErrorAction.REPLACE mode. ZipCoder uses
         // REPORT mode.
         if (isUTF8 && cd instanceof ArrayDecoder) {
-            int clen = ((ArrayDecoder)cd).decode(ba, 0, length, ca);
+            int clen = ((ArrayDecoder)cd).decode(ba, off, length, ca);
             if (clen == -1)    // malformed
                 throw new IllegalArgumentException("MALFORMED");
             return new String(ca, 0, clen);
         }
-        ByteBuffer bb = ByteBuffer.wrap(ba, 0, length);
+        ByteBuffer bb = ByteBuffer.wrap(ba, off, length);
         CharBuffer cb = CharBuffer.wrap(ca);
         CoderResult cr = cd.decode(bb, cb, true);
         if (!cr.isUnderflow())
@@ -69,8 +69,12 @@ final class ZipCoder {
         return new String(ca, 0, cb.position());
     }
 
+    String toString(byte[] ba, int length) {
+        return toString(ba, 0, length);
+    }
+
     String toString(byte[] ba) {
-        return toString(ba, ba.length);
+        return toString(ba, 0, ba.length);
     }
 
     byte[] getBytes(String s) {
@@ -111,13 +115,16 @@ final class ZipCoder {
         return utf8.getBytes(s);
     }
 
-
     String toStringUTF8(byte[] ba, int len) {
+        return toStringUTF8(ba, 0, len);
+    }
+
+    String toStringUTF8(byte[] ba, int off, int len) {
         if (isUTF8)
-            return toString(ba, len);
+            return toString(ba, off, len);
         if (utf8 == null)
             utf8 = new ZipCoder(StandardCharsets.UTF_8);
-        return utf8.toString(ba, len);
+        return utf8.toString(ba, off, len);
     }
 
     boolean isUTF8() {
diff --git a/jdk/src/share/classes/java/util/zip/ZipFile.java b/jdk/src/share/classes/java/util/zip/ZipFile.java
index 9f8aff6ef..5d9b0de97 100644
--- a/jdk/src/share/classes/java/util/zip/ZipFile.java
+++ b/jdk/src/share/classes/java/util/zip/ZipFile.java
@@ -30,14 +30,24 @@ import java.io.InputStream;
 import java.io.IOException;
 import java.io.EOFException;
 import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.RandomAccessFile;
 import java.nio.charset.Charset;
 import java.nio.charset.StandardCharsets;
+import java.nio.file.attribute.BasicFileAttributes;
+import java.nio.file.Path;
+import java.nio.file.Files;
+import java.nio.file.NoSuchFileException;
+
 import java.util.ArrayDeque;
+import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.Deque;
 import java.util.Enumeration;
 import java.util.HashMap;
 import java.util.Iterator;
 import java.util.Map;
+import java.util.Objects;
 import java.util.NoSuchElementException;
 import java.util.Spliterator;
 import java.util.Spliterators;
@@ -46,7 +56,9 @@ import java.util.jar.JarFile;
 import java.util.stream.Stream;
 import java.util.stream.StreamSupport;
 
+import static java.util.zip.ZipConstants.*;
 import static java.util.zip.ZipConstants64.*;
+import static java.util.zip.ZipUtils.*;
 
 /**
  * This class is used to read entries from a zip file.
@@ -59,12 +71,11 @@ import static java.util.zip.ZipConstants64.*;
  */
 public
 class ZipFile implements ZipConstants, Closeable {
-    private long jzfile;  // address of jzfile data
+
     private final String name;     // zip file name
-    private final int total;       // total number of entries
-    private final boolean locsig;  // if zip file starts with LOCSIG (usually true)
     private volatile boolean closeRequested = false;
-    private int manifestNum = 0;       // number of META-INF/MANIFEST.MF, case insensitive
+    private Source zsrc;
+    private ZipCoder zc;
 
     private static final int STORED = ZipEntry.STORED;
     private static final int DEFLATED = ZipEntry.DEFLATED;
@@ -83,26 +94,11 @@ class ZipFile implements ZipConstants, Closeable {
      */
     public static final int OPEN_DELETE = 0x4;
 
-    static {
-        /* Zip library is loaded from System.initializeSystemClass */
-        initIDs();
-    }
-
-    private static native void initIDs();
-
-    private static final boolean usemmap;
-
     private static final boolean ensuretrailingslash;
 
     static {
-        // A system prpperty to disable mmap use to avoid vm crash when
-        // in-use zip file is accidently overwritten by others.
-        String prop = sun.misc.VM.getSavedProperty("sun.zip.disableMemoryMapping");
-        usemmap = (prop == null ||
-                   !(prop.length() == 0 || prop.equalsIgnoreCase("true")));
-
         // see getEntry() for details
-        prop = sun.misc.VM.getSavedProperty("jdk.util.zip.ensureTrailingSlash");
+        String prop = sun.misc.VM.getSavedProperty("jdk.util.zip.ensureTrailingSlash");
         ensuretrailingslash = prop == null || !prop.equalsIgnoreCase("false");
     }
 
@@ -171,8 +167,6 @@ class ZipFile implements ZipConstants, Closeable {
         this(file, OPEN_READ);
     }
 
-    private ZipCoder zc;
-
     /**
      * Opens a new <code>ZipFile</code> to read from the specified
      * <code>File</code> object in the specified mode.  The mode argument
@@ -224,17 +218,13 @@ class ZipFile implements ZipConstants, Closeable {
                 sm.checkDelete(name);
             }
         }
-        if (charset == null)
-            throw new NullPointerException("charset is null");
+        Objects.requireNonNull(charset, "charset");
         this.zc = ZipCoder.get(charset);
+        this.name = name;
         long t0 = System.nanoTime();
-        jzfile = open(name, mode, file.lastModified(), usemmap);
+        this.zsrc = Source.get(file, (mode & OPEN_DELETE) != 0);
         sun.misc.PerfCounter.getZipFileOpenTime().addElapsedTimeFrom(t0);
         sun.misc.PerfCounter.getZipFileCount().increment();
-        this.name = name;
-        this.total = getTotal(jzfile);
-        this.locsig = startsWithLOC(jzfile);
-        this.manifestNum = getManifestNum(jzfile);
     }
 
     /**
@@ -268,6 +258,7 @@ class ZipFile implements ZipConstants, Closeable {
 
     /**
      * Opens a ZIP file for reading given the specified File object.
+     * 
      * @param file the ZIP file to be opened for reading
      * @param charset
      *        The {@linkplain java.nio.charset.Charset charset} to be
@@ -298,10 +289,10 @@ class ZipFile implements ZipConstants, Closeable {
     public String getComment() {
         synchronized (this) {
             ensureOpen();
-            byte[] bcomm = getCommentBytes(jzfile);
-            if (bcomm == null)
+            if (zsrc.comment == null) {
                 return null;
-            return zc.toString(bcomm, bcomm.length);
+            }
+            return zc.toString(zsrc.comment);
         }
     }
 
@@ -314,47 +305,29 @@ class ZipFile implements ZipConstants, Closeable {
      * @throws IllegalStateException if the zip file has been closed
      */
     public ZipEntry getEntry(String name) {
-        if (name == null) {
-            throw new NullPointerException("name");
-        }
-        long jzentry = 0;
+        
+        Objects.requireNonNull(name, "name");
         synchronized (this) {
             ensureOpen();
-            jzentry = getEntry(jzfile, zc.getBytes(name), true);
-            if (jzentry != 0) {
-                // If no entry is found for the specified 'name' and
-                // the 'name' does not end with a forward slash '/',
-                // the implementation tries to find the entry with a
-                // slash '/' appended to the end of the 'name', before
-                // returning null. When such entry is found, the name
-                // that actually is found (with a slash '/' attached)
-                // is used
-                // (disabled if jdk.util.zip.ensureTrailingSlash=false)
-                ZipEntry ze = ensuretrailingslash ? getZipEntry(null, jzentry)
-                                                  : getZipEntry(name, jzentry);
-                freeEntry(jzfile, jzentry);
-                return ze;
+            int pos = zsrc.getEntryPos(zc.getBytes(name), true);
+            if (pos != -1) {
+                return ensuretrailingslash ? getZipEntry(null, pos)
+                                           : getZipEntry(name, pos);
             }
         }
         return null;
     }
 
-    private static native long getEntry(long jzfile, byte[] name,
-                                        boolean addSlash);
-
-    // freeEntry releases the C jzentry struct.
-    private static native void freeEntry(long jzfile, long jzentry);
-
-    // the outstanding inputstreams that need to be closed,
+    // The outstanding inputstreams that need to be closed,
     // mapped to the inflater objects they use.
     private final Map<InputStream, Inflater> streams = new WeakHashMap<>();
 
     /**
      * Returns an input stream for reading the contents of the specified
      * zip file entry.
-     *
-     * <p> Closing this ZIP file will, in turn, close all input
-     * streams that have been returned by invocations of this method.
+     * <p>
+     * Closing this ZIP file will, in turn, close all input streams that
+     * have been returned by invocations of this method.
      *
      * @param entry the zip file entry
      * @return the input stream for reading the contents of the specified
@@ -364,37 +337,38 @@ class ZipFile implements ZipConstants, Closeable {
      * @throws IllegalStateException if the zip file has been closed
      */
     public InputStream getInputStream(ZipEntry entry) throws IOException {
-        if (entry == null) {
-            throw new NullPointerException("entry");
-        }
-        long jzentry = 0;
+        Objects.requireNonNull(entry, "entry");
+        int pos = -1;
         ZipFileInputStream in = null;
         synchronized (this) {
             ensureOpen();
             if (!zc.isUTF8() && (entry.flag & EFS) != 0) {
-                jzentry = getEntry(jzfile, zc.getBytesUTF8(entry.name), false);
+                pos = zsrc.getEntryPos(zc.getBytesUTF8(entry.name), false);
             } else {
-                jzentry = getEntry(jzfile, zc.getBytes(entry.name), false);
+                pos = zsrc.getEntryPos(zc.getBytes(entry.name), false);
             }
-            if (jzentry == 0) {
+            if (pos == -1) {
                 return null;
             }
-            in = new ZipFileInputStream(jzentry);
-
-            switch (getEntryMethod(jzentry)) {
+            in = new ZipFileInputStream(zsrc.cen, pos);
+            switch (CENHOW(zsrc.cen, pos)) {
             case STORED:
                 synchronized (streams) {
                     streams.put(in, null);
                 }
                 return in;
             case DEFLATED:
+                // Inflater likes a bit of slack
                 // MORE: Compute good size for inflater stream:
-                long size = getEntrySize(jzentry) + 2; // Inflater likes a bit of slack
-                if (size > 65536) size = 8192;
-                if (size <= 0) size = 4096;
+                long size = CENLEN(zsrc.cen, pos) + 2;
+                if (size > 65536) {
+                    size = 8192;
+                }
+                if (size <= 0) {
+                    size = 4096;
+                }
                 Inflater inf = getInflater();
-                InputStream is =
-                    new ZipFileInflaterInputStream(in, inf, (int)size);
+                InputStream is = new ZipFileInflaterInputStream(in, inf, (int)size);
                 synchronized (streams) {
                     streams.put(is, inf);
                 }
@@ -467,8 +441,8 @@ class ZipFile implements ZipConstants, Closeable {
     private Inflater getInflater() {
         Inflater inf;
         synchronized (inflaterCache) {
-            while (null != (inf = inflaterCache.poll())) {
-                if (false == inf.ended()) {
+            while ((inf = inflaterCache.poll()) != null) {
+                if (!inf.ended()) {
                     return inf;
                 }
             }
@@ -480,7 +454,7 @@ class ZipFile implements ZipConstants, Closeable {
      * Releases the specified inflater to the list of available inflaters.
      */
     private void releaseInflater(Inflater inf) {
-        if (false == inf.ended()) {
+        if (!inf.ended()) {
             inf.reset();
             synchronized (inflaterCache) {
                 inflaterCache.add(inf);
@@ -489,7 +463,7 @@ class ZipFile implements ZipConstants, Closeable {
     }
 
     // List of available Inflater objects for decompression
-    private Deque<Inflater> inflaterCache = new ArrayDeque<>();
+    private final Deque<Inflater> inflaterCache = new ArrayDeque<>();
 
     /**
      * Returns the path name of the ZIP file.
@@ -501,9 +475,13 @@ class ZipFile implements ZipConstants, Closeable {
 
     private class ZipEntryIterator implements Enumeration<ZipEntry>, Iterator<ZipEntry> {
         private int i = 0;
+        private final int entryCount;
 
         public ZipEntryIterator() {
-            ensureOpen();
+            synchronized (ZipFile.this) {
+                ensureOpen();
+                this.entryCount = zsrc.total;
+            }
         }
 
         public boolean hasMoreElements() {
@@ -511,10 +489,7 @@ class ZipFile implements ZipConstants, Closeable {
         }
 
         public boolean hasNext() {
-            synchronized (ZipFile.this) {
-                ensureOpen();
-                return i < total;
-            }
+            return i < entryCount;
         }
 
         public ZipEntry nextElement() {
@@ -524,28 +499,11 @@ class ZipFile implements ZipConstants, Closeable {
         public ZipEntry next() {
             synchronized (ZipFile.this) {
                 ensureOpen();
-                if (i >= total) {
+                if (!hasNext()) {
                     throw new NoSuchElementException();
                 }
-                long jzentry = getNextEntry(jzfile, i++);
-                if (jzentry == 0) {
-                    String message;
-                    if (closeRequested) {
-                        message = "ZipFile concurrently closed";
-                    } else {
-                        message = getZipMessage(ZipFile.this.jzfile);
-                    }
-                    throw new ZipError("jzentry == 0" +
-                                       ",\n jzfile = " + ZipFile.this.jzfile +
-                                       ",\n total = " + ZipFile.this.total +
-                                       ",\n name = " + ZipFile.this.name +
-                                       ",\n i = " + i +
-                                       ",\n message = " + message
-                        );
-                }
-                ZipEntry ze = getZipEntry(null, jzentry);
-                freeEntry(jzfile, jzentry);
-                return ze;
+                // each "entry" has 3 ints in table entries
+                return getZipEntry(null, zsrc.getEntryPos(i++ * 3));
             }
         }
     }
@@ -575,50 +533,53 @@ class ZipFile implements ZipConstants, Closeable {
                         Spliterator.IMMUTABLE | Spliterator.NONNULL), false);
     }
 
-    private ZipEntry getZipEntry(String name, long jzentry) {
-        ZipEntry e = new ZipEntry();
-        e.flag = getEntryFlag(jzentry);  // get the flag first
-        if (name != null) {
-            e.name = name;
-        } else {
-            byte[] bname = getEntryBytes(jzentry, JZENTRY_NAME);
-            if (bname == null) {
-                e.name = "";             // length 0 empty name
-            } else if (!zc.isUTF8() && (e.flag & EFS) != 0) {
-                e.name = zc.toStringUTF8(bname, bname.length);
+    /* Checks ensureOpen() before invoke this method */
+    private ZipEntry getZipEntry(String name, int pos) {
+        byte[] cen = zsrc.cen;
+        int nlen = CENNAM(cen, pos);
+        int elen = CENEXT(cen, pos);
+        int clen = CENCOM(cen, pos);
+        int flag = CENFLG(cen, pos);
+        if (name == null) {
+            if (!zc.isUTF8() && (flag & EFS) != 0) {
+                name = zc.toStringUTF8(cen, pos + CENHDR, nlen);
             } else {
-                e.name = zc.toString(bname, bname.length);
-            }
-        }
-        e.xdostime = getEntryTime(jzentry);
-        e.crc = getEntryCrc(jzentry);
-        e.size = getEntrySize(jzentry);
-        e.csize = getEntryCSize(jzentry);
-        e.method = getEntryMethod(jzentry);
-        e.setExtra0(getEntryBytes(jzentry, JZENTRY_EXTRA), false);
-        byte[] bcomm = getEntryBytes(jzentry, JZENTRY_COMMENT);
-        if (bcomm == null) {
-            e.comment = null;
-        } else {
-            if (!zc.isUTF8() && (e.flag & EFS) != 0) {
-                e.comment = zc.toStringUTF8(bcomm, bcomm.length);
+                name = zc.toString(cen, pos + CENHDR, nlen);
+            }
+        }
+        ZipEntry e = new ZipEntry(name);
+        e.flag = flag;
+        e.xdostime = CENTIM(cen, pos);
+        e.crc = CENCRC(cen, pos);
+        e.size = CENLEN(cen, pos);
+        e.csize = CENSIZ(cen, pos);
+        e.method = CENHOW(cen, pos);
+        if (elen != 0) {
+            int start = pos + CENHDR + nlen;
+            e.setExtra0(Arrays.copyOfRange(cen, start, start + elen), true);
+        }
+        if (clen != 0) {
+            int start = pos + CENHDR + nlen + elen;
+            if (!zc.isUTF8() && (flag & EFS) != 0) {
+                e.comment = zc.toStringUTF8(cen, start, clen);
             } else {
-                e.comment = zc.toString(bcomm, bcomm.length);
+                e.comment = zc.toString(cen, start, clen);
             }
         }
         return e;
     }
 
-    private static native long getNextEntry(long jzfile, int i);
-
     /**
      * Returns the number of entries in the ZIP file.
+     * 
      * @return the number of entries in the ZIP file
      * @throws IllegalStateException if the zip file has been closed
      */
     public int size() {
-        ensureOpen();
-        return total;
+        synchronized (this) {
+            ensureOpen();
+            return zsrc.total;
+        }
     }
 
     /**
@@ -630,14 +591,15 @@ class ZipFile implements ZipConstants, Closeable {
      * @throws IOException if an I/O error has occurred
      */
     public void close() throws IOException {
-        if (closeRequested)
+        if (closeRequested) {
             return;
+        }
         closeRequested = true;
 
         synchronized (this) {
             // Close streams, release their inflaters
             synchronized (streams) {
-                if (false == streams.isEmpty()) {
+                if (!streams.isEmpty()) {
                     Map<InputStream, Inflater> copy = new HashMap<>(streams);
                     streams.clear();
                     for (Map.Entry<InputStream, Inflater> e : copy.entrySet()) {
@@ -649,21 +611,17 @@ class ZipFile implements ZipConstants, Closeable {
                     }
                 }
             }
-
             // Release cached inflaters
-            Inflater inf;
             synchronized (inflaterCache) {
-                while (null != (inf = inflaterCache.poll())) {
+                Inflater inf;
+                while ((inf = inflaterCache.poll()) != null) {
                     inf.end();
                 }
             }
-
-            if (jzfile != 0) {
-                // Close the zip file
-                long zf = this.jzfile;
-                jzfile = 0;
-
-                close(zf);
+            // Release zip src
+            if (zsrc != null) {
+                Source.close(zsrc);
+                zsrc = null;
             }
         }
     }
@@ -686,14 +644,11 @@ class ZipFile implements ZipConstants, Closeable {
         close();
     }
 
-    private static native void close(long jzfile);
-
     private void ensureOpen() {
         if (closeRequested) {
             throw new IllegalStateException("zip file closed");
         }
-
-        if (jzfile == 0) {
+        if (zsrc == null) {
             throw new IllegalStateException("The object is not initialized.");
         }
     }
@@ -709,40 +664,99 @@ class ZipFile implements ZipConstants, Closeable {
      * (possibly compressed) zip file entry.
      */
    private class ZipFileInputStream extends InputStream {
-        private volatile boolean zfisCloseRequested = false;
-        protected long jzentry; // address of jzentry data
+        private volatile boolean closeRequested = false;
         private   long pos;     // current position within entry data
         protected long rem;     // number of remaining bytes within entry
         protected long size;    // uncompressed size of this entry
 
-        ZipFileInputStream(long jzentry) {
-            pos = 0;
-            rem = getEntryCSize(jzentry);
-            size = getEntrySize(jzentry);
-            this.jzentry = jzentry;
+        ZipFileInputStream(byte[] cen, int cenpos) throws IOException {
+            rem = CENSIZ(cen, cenpos);
+            size = CENLEN(cen, cenpos);
+            pos = CENOFF(cen, cenpos);
+            // zip64
+            if (rem == ZIP64_MAGICVAL || size == ZIP64_MAGICVAL ||
+                pos == ZIP64_MAGICVAL) {
+                checkZIP64(cen, cenpos);
+            }
+            // negative for lazy initialization, see getDataOffset();
+            pos = - (pos + ZipFile.this.zsrc.locpos);
+        }
+
+        private void checkZIP64(byte[] cen, int cenpos) throws IOException {
+            int off = cenpos + CENHDR + CENNAM(cen, cenpos);
+            int end = off + CENEXT(cen, cenpos);
+            while (off + 4 < end) {
+                int tag = get16(cen, off);
+                int sz = get16(cen, off + 2);
+                off += 4;
+                if (off + sz > end)         // invalid data
+                    break;
+                if (tag == EXTID_ZIP64) {
+                    if (size == ZIP64_MAGICVAL) {
+                        if (sz < 8 || (off + 8) > end)
+                            break;
+                        size = get64(cen, off);
+                        sz -= 8;
+                        off += 8;
+                    }
+                    if (rem == ZIP64_MAGICVAL) {
+                        if (sz < 8 || (off + 8) > end)
+                            break;
+                        rem = get64(cen, off);
+                        sz -= 8;
+                        off += 8;
+                    }
+                    if (pos == ZIP64_MAGICVAL) {
+                        if (sz < 8 || (off + 8) > end)
+                            break;
+                        pos = get64(cen, off);
+                        sz -= 8;
+                        off += 8;
+                    }
+                    break;
+                }
+                off += sz;
+            }
+        }
+
+       /* The Zip file spec explicitly allows the LOC extra data size to
+        * be different from the CEN extra data size. Since we cannot trust
+        * the CEN extra data size, we need to read the LOC to determine
+        * the entry data offset.
+        */
+        private long initDataOffset() throws IOException {
+            if (pos <= 0) {
+                byte[] loc = new byte[LOCHDR];
+                pos = -pos;
+                int len = ZipFile.this.zsrc.readFullyAt(loc, 0, loc.length, pos);
+                if (len != LOCHDR) {
+                    throw new ZipException("ZipFile error reading zip file");
+                }
+                if (LOCSIG(loc) != LOCSIG) {
+                    throw new ZipException("ZipFile invalid LOC header (bad signature)");
+                }
+                pos += LOCHDR + LOCNAM(loc) + LOCEXT(loc);
+            }
+            return pos;
         }
 
         public int read(byte b[], int off, int len) throws IOException {
             synchronized (ZipFile.this) {
-                long rem = this.rem;
-                long pos = this.pos;
+                ensureOpenOrZipException();
+                initDataOffset();
                 if (rem == 0) {
                     return -1;
                 }
-                if (len <= 0) {
-                    return 0;
-                }
                 if (len > rem) {
                     len = (int) rem;
                 }
-
-                // Check if ZipFile open
-                ensureOpenOrZipException();
-                len = ZipFile.read(ZipFile.this.jzfile, jzentry, pos, b,
-                                   off, len);
+                if (len <= 0) {
+                    return 0;
+                }
+                len = ZipFile.this.zsrc.readAt(b, off, len, pos);
                 if (len > 0) {
-                    this.pos = (pos + len);
-                    this.rem = (rem - len);
+                    pos += len;
+                    rem -= len;
                 }
             }
             if (rem == 0) {
@@ -760,11 +774,16 @@ class ZipFile implements ZipConstants, Closeable {
             }
         }
 
-        public long skip(long n) {
-            if (n > rem)
-                n = rem;
-            pos += n;
-            rem -= n;
+        public long skip(long n) throws IOException {
+            synchronized (ZipFile.this) {
+                ensureOpenOrZipException();
+                initDataOffset();
+                if (n > rem) {
+                    n = rem;
+                }
+                pos += n;
+                rem -= n;
+            }
             if (rem == 0) {
                 close();
             }
@@ -780,17 +799,11 @@ class ZipFile implements ZipConstants, Closeable {
         }
 
         public void close() {
-            if (zfisCloseRequested)
+            if (closeRequested) {
                 return;
-            zfisCloseRequested = true;
-
-            rem = 0;
-            synchronized (ZipFile.this) {
-                if (jzentry != 0 && ZipFile.this.jzfile != 0) {
-                    freeEntry(ZipFile.this.jzfile, jzentry);
-                    jzentry = 0;
-                }
             }
+            closeRequested = true;
+            rem = 0;
             synchronized (streams) {
                 streams.remove(this);
             }
@@ -805,7 +818,10 @@ class ZipFile implements ZipConstants, Closeable {
         sun.misc.SharedSecrets.setJavaUtilZipFileAccess(
             new sun.misc.JavaUtilZipFileAccess() {
                 public boolean startsWithLocHeader(ZipFile zip) {
-                    return zip.startsWithLocHeader();
+                    return zip.zsrc.startsWithLoc;
+                }
+                public String[] getMetaInfEntryNames(ZipFile zip) {
+                    return zip.getMetaInfEntryNames();
                 }
                 public int getManifestNum(JarFile jar) {
                     return ((ZipFile)jar).getManifestNum();
@@ -815,11 +831,27 @@ class ZipFile implements ZipConstants, Closeable {
     }
 
     /**
-     * Returns {@code true} if, and only if, the zip file begins with {@code
-     * LOCSIG}.
+     * Returns an array of strings representing the names of all entries
+     * that begin with "META-INF/" (case ignored). This method is used
+     * in JarFile, via SharedSecrets, as an optimization when looking up
+     * manifest and signature file entries. Returns null if no entries
+     * were found.
      */
-    private boolean startsWithLocHeader() {
-        return locsig;
+    private String[] getMetaInfEntryNames() {
+        synchronized (this) {
+            ensureOpen();
+            if (zsrc.metanames == null) {
+                return null;
+            }
+            String[] names = new String[zsrc.metanames.length];
+            byte[] cen = zsrc.cen;
+            for (int i = 0; i < names.length; i++) {
+                int pos = zsrc.metanames[i];
+                names[i] = new String(cen, pos + CENHDR, CENNAM(cen, pos),
+                                      StandardCharsets.UTF_8);
+            }
+            return names;
+        }
     }
 
     /*
@@ -830,31 +862,506 @@ class ZipFile implements ZipConstants, Closeable {
     private int getManifestNum() {
         synchronized (this) {
             ensureOpen();
-            return manifestNum;
+            return zsrc.manifestNum;
         }
     }
+    
+    private static class Source {
+        // "META-INF/".length()
+        private static final int META_INF_LEN = 9;
+        private final Key key;               // the key in files
+        private int refs = 1;
+
+        private RandomAccessFile zfile;      // zfile of the underlying zip file
+        private byte[] cen;                  // CEN & ENDHDR
+        private long locpos;                 // position of first LOC header (usually 0)
+        private byte[] comment;              // zip file comment
+                                             // list of meta entries in META-INF dir                                 
+        private int[] metanames;
+        private int manifestNum = 0;         // number of META-INF/MANIFEST.MF, case insensitive
+        private final boolean startsWithLoc; // true, if zip file starts with LOCSIG (usually true)
+
+        // A Hashmap for all entries.
+        //
+        // A cen entry of Zip/JAR file. As we have one for every entry in every active Zip/JAR,
+        // We might have a lot of these in a typical system. In order to save space we don't
+        // keep the name in memory, but merely remember a 32 bit {@code hash} value of the
+        // entry name and its offset {@code pos} in the central directory hdeader.
+        //
+        // private static class Entry {
+        //     int hash;       // 32 bit hashcode on name
+        //     int next;       // hash chain: index into entries
+        //     int pos;        // Offset of central directory file header
+        // }
+        // private Entry[] entries;             // array of hashed cen entry
+        //
+        // To reduce the total size of entries further, we use a int[] here to store 3 "int"
+        // {@code hash}, {@code next and {@code "pos for each entry. The entry can then be
+        // referred by their index of their positions in the {@code entries}.
+        //
+        private int[] entries;                  // array of hashed cen entry
+        private int addEntry(int index, int hash, int next, int pos) {
+            entries[index++] = hash;
+            entries[index++] = next;
+            entries[index++] = pos;
+            return index;
+        }
+        private int getEntryHash(int index) { return entries[index]; }
+        private int getEntryNext(int index) { return entries[index + 1]; }
+        private int getEntryPos(int index)  { return entries[index + 2]; }
+        private static final int ZIP_ENDCHAIN  = -1;
+        private int total;                   // total number of entries
+        private int[] table;                 // Hash chain heads: indexes into entries
+        private int tablelen;                // number of hash heads
+
+        private static class Key {
+            BasicFileAttributes attrs;
+            File file;
+
+            public Key(File file, BasicFileAttributes attrs) {
+                this.attrs = attrs;
+                this.file = file;
+            }
+
+            public int hashCode() {
+                long t = attrs.lastModifiedTime().toMillis();
+                return ((int)(t ^ (t >>> 32))) + file.hashCode();
+            }
+
+            public boolean equals(Object obj) {
+                if (obj instanceof Key) {
+                    Key key = (Key)obj;
+                    if (!attrs.lastModifiedTime().equals(key.attrs.lastModifiedTime())) {
+                        return false;
+                    }
+                    Object fk = attrs.fileKey();
+                    if (fk != null) {
+                        return  fk.equals(key.attrs.fileKey());
+                    } else {
+                        return file.equals(key.file);
+                    }
+                }
+                return false;
+            }
+        }
+        private static final HashMap<Key, Source> files = new HashMap<>();
+
+
+        public static Source get(File file, boolean toDelete) throws IOException {
+            Key key = null;
+            try {
+                key = new Key(file,
+                          Files.readAttributes(file.toPath(), BasicFileAttributes.class));
+            } catch (NoSuchFileException exception) {
+                throw new FileNotFoundException(exception.getMessage());
+            }
+            Source src = null;
+            synchronized (files) {
+                src = files.get(key);
+                if (src != null) {
+                    src.refs++;
+                    return src;
+                }
+            }
+            src = new Source(key, toDelete);
+
+            synchronized (files) {
+                if (files.containsKey(key)) {    // someone else put in first
+                    src.close();                 // close the newly created one
+                    src = files.get(key);
+                    src.refs++;
+                    return src;
+                }
+                files.put(key, src);
+                return src;
+            }
+        }
+
+        private static void close(Source src) throws IOException {
+            synchronized (files) {
+                if (--src.refs == 0) {
+                    files.remove(src.key);
+                    src.close();
+                }
+            }
+        }
+
+        private Source(Key key, boolean toDelete) throws IOException {
+            this.key = key;
+            this.zfile = new RandomAccessFile(key.file, "r");
+            if (toDelete) {
+                key.file.delete();
+            }
+            try {
+                initCEN(-1);
+                byte[] buf = new byte[4];
+                readFullyAt(buf, 0, 4, 0);
+                this.startsWithLoc = (LOCSIG(buf) == LOCSIG);
+            } catch (IOException x) {
+                try {
+                    this.zfile.close();
+                } catch (IOException xx) {}
+                throw x;
+            }
+        }
+
+        private void close() throws IOException {
+            zfile.close();
+            zfile = null;
+            cen = null;
+            entries = null;
+            table = null;
+            manifestNum = 0;
+            metanames = null;
+        }
+
+        private static final int BUF_SIZE = 8192;
+        private final int readFullyAt(byte[] buf, int off, int len, long pos)
+            throws IOException
+        {
+            synchronized(zfile) {
+                zfile.seek(pos);
+                int N = len;
+                while (N > 0) {
+                    int n = Math.min(BUF_SIZE, N);
+                    zfile.readFully(buf, off, n);
+                    off += n;
+                    N -= n;
+                }
+                return len;
+            }
+        }
+
+        private final int readAt(byte[] buf, int off, int len, long pos)
+            throws IOException
+        {
+            synchronized(zfile) {
+                zfile.seek(pos);
+                return zfile.read(buf, off, len);
+            }
+        }
+
+        private static final int hashN(byte[] a, int off, int len) {
+            int h = 1;
+            while (len-- > 0) {
+                h = 31 * h + a[off++];
+            }
+            return h;
+        }
+
+        private static final int hash_append(int hash, byte b) {
+            return hash * 31 + b;
+        }
 
-    private static native long open(String name, int mode, long lastModified,
-                                    boolean usemmap) throws IOException;
-    private static native int getTotal(long jzfile);
-    private static native boolean startsWithLOC(long jzfile);
-    private static native int getManifestNum(long jzfile);
-    private static native int read(long jzfile, long jzentry,
-                                   long pos, byte[] b, int off, int len);
-
-    // access to the native zentry object
-    private static native long getEntryTime(long jzentry);
-    private static native long getEntryCrc(long jzentry);
-    private static native long getEntryCSize(long jzentry);
-    private static native long getEntrySize(long jzentry);
-    private static native int getEntryMethod(long jzentry);
-    private static native int getEntryFlag(long jzentry);
-    private static native byte[] getCommentBytes(long jzfile);
-
-    private static final int JZENTRY_NAME = 0;
-    private static final int JZENTRY_EXTRA = 1;
-    private static final int JZENTRY_COMMENT = 2;
-    private static native byte[] getEntryBytes(long jzentry, int type);
-
-    private static native String getZipMessage(long jzfile);
+        private static class End {
+            int  centot;     // 4 bytes
+            long cenlen;     // 4 bytes
+            long cenoff;     // 4 bytes
+            long endpos;     // 4 bytes
+        }
+
+        /*
+         * Searches for end of central directory (END) header. The contents of
+         * the END header will be read and placed in endbuf. Returns the file
+         * position of the END header, otherwise returns -1 if the END header
+         * was not found or an error occurred.
+         */
+        private End findEND() throws IOException {
+            long ziplen = zfile.length();
+            if (ziplen <= 0)
+                zerror("zip file is empty");
+            End end = new End();
+            byte[] buf = new byte[READBLOCKSZ];
+            long minHDR = (ziplen - END_MAXLEN) > 0 ? ziplen - END_MAXLEN : 0;
+            long minPos = minHDR - (buf.length - ENDHDR);
+            for (long pos = ziplen - buf.length; pos >= minPos; pos -= (buf.length - ENDHDR)) {
+                int off = 0;
+                if (pos < 0) {
+                    // Pretend there are some NUL bytes before start of file
+                    off = (int)-pos;
+                    Arrays.fill(buf, 0, off, (byte)0);
+                }
+                int len = buf.length - off;
+                if (readFullyAt(buf, off, len, pos + off) != len ) {
+                    zerror("zip END header not found");
+                }
+                // Now scan the block backwards for END header signature
+                for (int i = buf.length - ENDHDR; i >= 0; i--) {
+                    if (buf[i+0] == (byte)'P'    &&
+                        buf[i+1] == (byte)'K'    &&
+                        buf[i+2] == (byte)'\005' &&
+                        buf[i+3] == (byte)'\006') {
+                        // Found ENDSIG header
+                        byte[] endbuf = Arrays.copyOfRange(buf, i, i + ENDHDR);
+                        end.centot = ENDTOT(endbuf);
+                        end.cenlen = ENDSIZ(endbuf);
+                        end.cenoff = ENDOFF(endbuf);
+                        end.endpos = pos + i;
+                        int comlen = ENDCOM(endbuf);
+                        if (end.endpos + ENDHDR + comlen != ziplen) {
+                            // ENDSIG matched, however the size of file comment in it does
+                            // not match the real size. One "common" cause for this problem
+                            // is some "extra" bytes are padded at the end of the zipfile.
+                            // Let's do some extra verification, we don't care about the
+                            // performance in this situation.
+                            byte[] sbuf = new byte[4];
+                            long cenpos = end.endpos - end.cenlen;
+                            long locpos = cenpos - end.cenoff;
+                            if  (cenpos < 0 ||
+                                 locpos < 0 ||
+                                 readFullyAt(sbuf, 0, sbuf.length, cenpos) != 4 ||
+                                 GETSIG(sbuf) != CENSIG ||
+                                 readFullyAt(sbuf, 0, sbuf.length, locpos) != 4 ||
+                                 GETSIG(sbuf) != LOCSIG) {
+                                continue;
+                            }
+                        }
+                        if (comlen > 0) {    // this zip file has comlen
+                            comment = new byte[comlen];
+                            if (readFullyAt(comment, 0, comlen, end.endpos + ENDHDR) != comlen) {
+                                zerror("zip comment read failed");
+                            }
+                        }
+                        if (end.cenlen == ZIP64_MAGICVAL ||
+                            end.cenoff == ZIP64_MAGICVAL ||
+                            end.centot == ZIP64_MAGICCOUNT)
+                        {
+                            // need to find the zip64 end;
+                            try {
+                                byte[] loc64 = new byte[ZIP64_LOCHDR];
+                                if (readFullyAt(loc64, 0, loc64.length, end.endpos - ZIP64_LOCHDR)
+                                    != loc64.length || GETSIG(loc64) != ZIP64_LOCSIG) {
+                                    return end;
+                                }
+                                long end64pos = ZIP64_LOCOFF(loc64);
+                                byte[] end64buf = new byte[ZIP64_ENDHDR];
+                                if (readFullyAt(end64buf, 0, end64buf.length, end64pos)
+                                    != end64buf.length || GETSIG(end64buf) != ZIP64_ENDSIG) {
+                                    return end;
+                                }
+                                // end64 found, re-calcualte everything.
+                                end.cenlen = ZIP64_ENDSIZ(end64buf);
+                                end.cenoff = ZIP64_ENDOFF(end64buf);
+                                end.centot = (int)ZIP64_ENDTOT(end64buf); // assume total < 2g
+                                end.endpos = end64pos;
+                            } catch (IOException x) {}    // no zip64 loc/end
+                        }
+                        return end;
+                    }
+                }
+            }
+            zerror("zip END header not found");
+            return null; //make compiler happy
+        }
+
+        // Reads zip file central directory.
+        private void initCEN(int knownTotal) throws IOException {
+            if (knownTotal == -1) {
+                End end = findEND();
+                if (end.endpos == 0) {
+                    locpos = 0;
+                    total = 0;
+                    entries  = new int[0];
+                    cen = null;
+                    return;         // only END header present
+                }
+                if (end.cenlen > end.endpos)
+                    zerror("invalid END header (bad central directory size)");
+                long cenpos = end.endpos - end.cenlen;     // position of CEN table
+                // Get position of first local file (LOC) header, taking into
+                // account that there may be a stub prefixed to the zip file.
+                locpos = cenpos - end.cenoff;
+                if (locpos < 0) {
+                    zerror("invalid END header (bad central directory offset)");
+                }
+                // read in the CEN and END
+                cen = new byte[(int)(end.cenlen + ENDHDR)];
+                if (readFullyAt(cen, 0, cen.length, cenpos) != end.cenlen + ENDHDR) {
+                    zerror("read CEN tables failed");
+                }
+                total = end.centot;
+            } else {
+                total = knownTotal;
+            }
+            // hash table for entries
+            entries  = new int[total * 3];
+            tablelen = ((total/2) | 1); // Odd -> fewer collisions
+            table    =  new int[tablelen];
+            Arrays.fill(table, ZIP_ENDCHAIN);
+            int idx = 0;
+            int hash = 0;
+            int next = -1;
+
+            // list for all meta entries
+            ArrayList<Integer> metanamesList = null;
+
+            // Iterate through the entries in the central directory
+            int i = 0;
+            int hsh = 0;
+            int pos = 0;
+            int limit = cen.length - ENDHDR;
+            manifestNum = 0;
+            while (pos + CENHDR  <= limit) {
+                if (i >= total) {
+                    // This will only happen if the zip file has an incorrect
+                    // ENDTOT field, which usually means it contains more than
+                    // 65535 entries.
+                    initCEN(countCENHeaders(cen, limit));
+                    return;
+                }
+                if (CENSIG(cen, pos) != CENSIG)
+                    zerror("invalid CEN header (bad signature)");
+                int method = CENHOW(cen, pos);
+                int nlen   = CENNAM(cen, pos);
+                int elen   = CENEXT(cen, pos);
+                int clen   = CENCOM(cen, pos);
+                if ((CENFLG(cen, pos) & 1) != 0)
+                    zerror("invalid CEN header (encrypted entry)");
+                if (method != STORED && method != DEFLATED)
+                    zerror("invalid CEN header (bad compression method: " + method + ")");
+                if (pos + CENHDR + nlen > limit)
+                    zerror("invalid CEN header (bad header size)");
+                // Record the CEN offset and the name hash in our hash cell.
+                hash = hashN(cen, pos + CENHDR, nlen);
+                hsh = (hash & 0x7fffffff) % tablelen;
+                next = table[hsh];
+                table[hsh] = idx;
+                idx = addEntry(idx, hash, next, pos);
+                // Adds name to metanames.
+                if (isMetaName(cen, pos + CENHDR, nlen)) {
+                    if (metanamesList == null)
+                        metanamesList = new ArrayList<>(4);
+                    metanamesList.add(pos);
+                    if (isManifestName(cen, pos + CENHDR +
+                            META_INF_LEN, nlen - META_INF_LEN)) {
+                        manifestNum++;
+                    }
+                }
+                // skip ext and comment
+                pos += (CENHDR + nlen + elen + clen);
+                i++;
+            }
+            total = i;
+            if (metanamesList != null) {
+                metanames = new int[metanamesList.size()];
+                for (int j = 0, len = metanames.length; j < len; j++) {
+                    metanames[j] = metanamesList.get(j);
+                }
+            }
+            if (pos + ENDHDR != cen.length) {
+                zerror("invalid CEN header (bad header size)");
+            }
+        }
+
+        private static void zerror(String msg) throws ZipException {
+            throw new ZipException(msg);
+        }
+
+        /*
+         * Returns the {@code pos} of the zip cen entry corresponding to the
+         * specified entry name, or -1 if not found.
+         */
+        private int getEntryPos(byte[] name, boolean addSlash) {
+            if (total == 0) {
+                return -1;
+            }
+            int hsh = hashN(name, 0, name.length);
+            int idx = table[(hsh & 0x7fffffff) % tablelen];
+            /*
+             * This while loop is an optimization where a double lookup
+             * for name and name+/ is being performed. The name char
+             * array has enough room at the end to try again with a
+             * slash appended if the first table lookup does not succeed.
+             */
+            while(true) {
+                /*
+                 * Search down the target hash chain for a entry whose
+                 * 32 bit hash matches the hashed name.
+                 */
+                while (idx != ZIP_ENDCHAIN) {
+                    if (getEntryHash(idx) == hsh) {
+                        // The CEN name must match the specfied one
+                        int pos = getEntryPos(idx);
+                        if (name.length == CENNAM(cen, pos)) {
+                            boolean matched = true;
+                            int nameoff = pos + CENHDR;
+                            for (int i = 0; i < name.length; i++) {
+                                if (name[i] != cen[nameoff++]) {
+                                    matched = false;
+                                    break;
+                                }
+                            }
+                            if (matched) {
+                                return pos;
+                            }
+                         }
+                    }
+                    idx = getEntryNext(idx);
+                }
+                /* If not addSlash, or slash is already there, we are done */
+                if (!addSlash  || name[name.length - 1] == '/') {
+                     return -1;
+                }
+                /* Add slash and try once more */
+                name = Arrays.copyOf(name, name.length + 1);
+                name[name.length - 1] = '/';
+                hsh = hash_append(hsh, (byte)'/');
+                //idx = table[hsh % tablelen];
+                idx = table[(hsh & 0x7fffffff) % tablelen];
+                addSlash = false;
+            }
+        }
+
+        /**
+         * Returns true if the bytes represent a non-directory name
+         * beginning with "META-INF/", disregarding ASCII case.
+         */
+        private static boolean isMetaName(byte[] name, int off, int len) {
+            // Use the "oldest ASCII trick in the book"
+            return len > 9                     // "META-INF/".length()
+                && name[off + len - 1] != '/'  // non-directory
+                && (name[off++] | 0x20) == 'm'
+                && (name[off++] | 0x20) == 'e'
+                && (name[off++] | 0x20) == 't'
+                && (name[off++] | 0x20) == 'a'
+                && (name[off++]       ) == '-'
+                && (name[off++] | 0x20) == 'i'
+                && (name[off++] | 0x20) == 'n'
+                && (name[off++] | 0x20) == 'f'
+                && (name[off]         ) == '/';
+        }
+
+        /*
+         * Check if the bytes represents a name equals to MANIFEST.MF
+         */
+        private boolean isManifestName(byte[] name, int off, int len) {
+            return (len == 11 // "MANIFEST.MF".length()
+                    && (name[off++] | 0x20) == 'm'
+                    && (name[off++] | 0x20) == 'a'
+                    && (name[off++] | 0x20) == 'n'
+                    && (name[off++] | 0x20) == 'i'
+                    && (name[off++] | 0x20) == 'f'
+                    && (name[off++] | 0x20) == 'e'
+                    && (name[off++] | 0x20) == 's'
+                    && (name[off++] | 0x20) == 't'
+                    && (name[off++]       ) == '.'
+                    && (name[off++] | 0x20) == 'm'
+                    && (name[off]   | 0x20) == 'f');
+        }
+
+        /*
+         * Counts the number of CEN headers in a central directory extending
+         * from BEG to END.  Might return a bogus answer if the zip file is
+         * corrupt, but will not crash.
+         */
+        static int countCENHeaders(byte[] cen, int end) {
+            int count = 0;
+            int pos = 0;
+            while (pos + CENHDR <= end) {
+                count++;
+                pos += (CENHDR + CENNAM(cen, pos) + CENEXT(cen, pos) + CENCOM(cen, pos));
+            }
+            return count;
+        }
+    }
 }
diff --git a/jdk/src/share/classes/java/util/zip/ZipUtils.java b/jdk/src/share/classes/java/util/zip/ZipUtils.java
index cd8b05278..a9b9db948 100644
--- a/jdk/src/share/classes/java/util/zip/ZipUtils.java
+++ b/jdk/src/share/classes/java/util/zip/ZipUtils.java
@@ -29,6 +29,8 @@ import java.nio.file.attribute.FileTime;
 import java.util.Date;
 import java.util.concurrent.TimeUnit;
 
+import static java.util.zip.ZipConstants.ENDHDR;
+
 class ZipUtils {
 
     // used to adjust values between Windows and java epoch
@@ -126,7 +128,7 @@ class ZipUtils {
      * The bytes are assumed to be in Intel (little-endian) byte order.
      */
     public static final int get16(byte b[], int off) {
-        return Byte.toUnsignedInt(b[off]) | (Byte.toUnsignedInt(b[off+1]) << 8);
+        return (b[off] & 0xff) | ((b[off + 1] & 0xff) << 8);
     }
 
     /**
@@ -144,4 +146,79 @@ class ZipUtils {
     public static final long get64(byte b[], int off) {
         return get32(b, off) | (get32(b, off+4) << 32);
     }
+
+    // fields access methods
+    static final int CH(byte[] b, int n) {
+        return b[n] & 0xff ;
+    }
+
+    static final int SH(byte[] b, int n) {
+        return (b[n] & 0xff) | ((b[n + 1] & 0xff) << 8);
+    }
+
+    static final long LG(byte[] b, int n) {
+        return ((SH(b, n)) | (SH(b, n + 2) << 16)) & 0xffffffffL;
+    }
+
+    static final long LL(byte[] b, int n) {
+        return (LG(b, n)) | (LG(b, n + 4) << 32);
+    }
+
+    static final long GETSIG(byte[] b) {
+        return LG(b, 0);
+    }
+
+    // local file (LOC) header fields
+    static final long LOCSIG(byte[] b) { return LG(b, 0); } // signature
+    static final int  LOCVER(byte[] b) { return SH(b, 4); } // version needed to extract
+    static final int  LOCFLG(byte[] b) { return SH(b, 6); } // general purpose bit flags
+    static final int  LOCHOW(byte[] b) { return SH(b, 8); } // compression method
+    static final long LOCTIM(byte[] b) { return LG(b, 10);} // modification time
+    static final long LOCCRC(byte[] b) { return LG(b, 14);} // crc of uncompressed data
+    static final long LOCSIZ(byte[] b) { return LG(b, 18);} // compressed data size
+    static final long LOCLEN(byte[] b) { return LG(b, 22);} // uncompressed data size
+    static final int  LOCNAM(byte[] b) { return SH(b, 26);} // filename length
+    static final int  LOCEXT(byte[] b) { return SH(b, 28);} // extra field length
+
+    // extra local (EXT) header fields
+    static final long EXTCRC(byte[] b) { return LG(b, 4);}  // crc of uncompressed data
+    static final long EXTSIZ(byte[] b) { return LG(b, 8);}  // compressed size
+    static final long EXTLEN(byte[] b) { return LG(b, 12);} // uncompressed size
+
+    // end of central directory header (END) fields
+    static final int  ENDSUB(byte[] b) { return SH(b, 8); }  // number of entries on this disk
+    static final int  ENDTOT(byte[] b) { return SH(b, 10);}  // total number of entries
+    static final long ENDSIZ(byte[] b) { return LG(b, 12);}  // central directory size
+    static final long ENDOFF(byte[] b) { return LG(b, 16);}  // central directory offset
+    static final int  ENDCOM(byte[] b) { return SH(b, 20);}  // size of zip file comment
+    static final int  ENDCOM(byte[] b, int off) { return SH(b, off + 20);}
+
+    // zip64 end of central directory recoder fields
+    static final long ZIP64_ENDTOD(byte[] b) { return LL(b, 24);}  // total number of entries on disk
+    static final long ZIP64_ENDTOT(byte[] b) { return LL(b, 32);}  // total number of entries
+    static final long ZIP64_ENDSIZ(byte[] b) { return LL(b, 40);}  // central directory size
+    static final long ZIP64_ENDOFF(byte[] b) { return LL(b, 48);}  // central directory offset
+    static final long ZIP64_LOCOFF(byte[] b) { return LL(b, 8);}   // zip64 end offset
+
+    // central directory header (CEN) fields
+    static final long CENSIG(byte[] b, int pos) { return LG(b, pos + 0); }
+    static final int  CENVEM(byte[] b, int pos) { return SH(b, pos + 4); }
+    static final int  CENVER(byte[] b, int pos) { return SH(b, pos + 6); }
+    static final int  CENFLG(byte[] b, int pos) { return SH(b, pos + 8); }
+    static final int  CENHOW(byte[] b, int pos) { return SH(b, pos + 10);}
+    static final long CENTIM(byte[] b, int pos) { return LG(b, pos + 12);}
+    static final long CENCRC(byte[] b, int pos) { return LG(b, pos + 16);}
+    static final long CENSIZ(byte[] b, int pos) { return LG(b, pos + 20);}
+    static final long CENLEN(byte[] b, int pos) { return LG(b, pos + 24);}
+    static final int  CENNAM(byte[] b, int pos) { return SH(b, pos + 28);}
+    static final int  CENEXT(byte[] b, int pos) { return SH(b, pos + 30);}
+    static final int  CENCOM(byte[] b, int pos) { return SH(b, pos + 32);}
+    static final int  CENDSK(byte[] b, int pos) { return SH(b, pos + 34);}
+    static final int  CENATT(byte[] b, int pos) { return SH(b, pos + 36);}
+    static final long CENATX(byte[] b, int pos) { return LG(b, pos + 38);}
+    static final long CENOFF(byte[] b, int pos) { return LG(b, pos + 42);}
+
+    // The END header is followed by a variable length comment of size < 64k.
+    static final long END_MAXLEN = 0xFFFF + ENDHDR;
+    static final int READBLOCKSZ = 128;
 }
diff --git a/jdk/src/share/classes/sun/misc/JavaUtilZipFileAccess.java b/jdk/src/share/classes/sun/misc/JavaUtilZipFileAccess.java
index 0d931d1db..d140f54a5 100644
--- a/jdk/src/share/classes/sun/misc/JavaUtilZipFileAccess.java
+++ b/jdk/src/share/classes/sun/misc/JavaUtilZipFileAccess.java
@@ -31,5 +31,6 @@ import java.util.zip.ZipFile;
 public interface JavaUtilZipFileAccess {
     public boolean startsWithLocHeader(ZipFile zip);
     public int getManifestNum(JarFile zip);
+    public String[] getMetaInfEntryNames(ZipFile zip);
 }
 
diff --git a/jdk/src/share/classes/sun/misc/VM.java b/jdk/src/share/classes/sun/misc/VM.java
index 3e64628c6..cb757b3e3 100644
--- a/jdk/src/share/classes/sun/misc/VM.java
+++ b/jdk/src/share/classes/sun/misc/VM.java
@@ -310,9 +310,6 @@ public class VM {
         // used by java.lang.Integer.IntegerCache
         props.remove("java.lang.Integer.IntegerCache.high");
 
-        // used by java.util.zip.ZipFile
-        props.remove("sun.zip.disableMemoryMapping");
-
         // used by sun.launcher.LauncherHelper
         props.remove("sun.java.launcher.diag");
 
diff --git a/jdk/src/share/native/java/util/zip/ZipFile.c b/jdk/src/share/native/java/util/zip/ZipFile.c
deleted file mode 100644
index 8e3698290..000000000
--- a/jdk/src/share/native/java/util/zip/ZipFile.c
+++ /dev/null
@@ -1,403 +0,0 @@
-/*
- * Copyright (c) 1998, 2015, 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.  Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * 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.
- */
-
-/*
- * Native method support for java.util.zip.ZipFile
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-#include <ctype.h>
-#include <assert.h>
-#include "jlong.h"
-#include "jvm.h"
-#include "jni.h"
-#include "jni_util.h"
-#include "zip_util.h"
-#ifdef WIN32
-#include "io_util_md.h"
-#else
-#include "io_util.h"
-#endif
-
-#include "java_util_zip_ZipFile.h"
-#include "java_util_jar_JarFile.h"
-
-#define DEFLATED 8
-#define STORED 0
-
-static jfieldID jzfileID;
-
-static int OPEN_READ = java_util_zip_ZipFile_OPEN_READ;
-static int OPEN_DELETE = java_util_zip_ZipFile_OPEN_DELETE;
-
-JNIEXPORT void JNICALL
-Java_java_util_zip_ZipFile_initIDs(JNIEnv *env, jclass cls)
-{
-    jzfileID = (*env)->GetFieldID(env, cls, "jzfile", "J");
-    assert(jzfileID != 0);
-}
-
-static void
-ThrowZipException(JNIEnv *env, const char *msg)
-{
-    jstring s = NULL;
-    jobject x;
-
-    if (msg != NULL) {
-        s = JNU_NewStringPlatform(env, msg);
-    }
-    if (s != NULL) {
-        x = JNU_NewObjectByName(env,
-                            "java/util/zip/ZipException",
-                            "(Ljava/lang/String;)V", s);
-        if (x != NULL) {
-            (*env)->Throw(env, x);
-        }
-    }
-}
-
-JNIEXPORT jlong JNICALL
-Java_java_util_zip_ZipFile_open(JNIEnv *env, jclass cls, jstring name,
-                                        jint mode, jlong lastModified,
-                                        jboolean usemmap)
-{
-    const char *path = JNU_GetStringPlatformChars(env, name, 0);
-    char *msg = 0;
-    jlong result = 0;
-    int flag = 0;
-    jzfile *zip = 0;
-
-    if (mode & OPEN_READ) flag |= O_RDONLY;
-    if (mode & OPEN_DELETE) flag |= JVM_O_DELETE;
-
-    if (path != 0) {
-        zip = ZIP_Get_From_Cache(path, &msg, lastModified);
-        if (zip == 0 && msg == 0) {
-            ZFILE zfd = 0;
-#ifdef WIN32
-            zfd = winFileHandleOpen(env, name, flag);
-            if (zfd == -1) {
-                /* Exception already pending. */
-                goto finally;
-            }
-#else
-            zfd = JVM_Open(path, flag, 0);
-            if (zfd < 0) {
-                throwFileNotFoundException(env, name);
-                goto finally;
-            }
-#endif
-            zip = ZIP_Put_In_Cache0(path, zfd, &msg, lastModified, usemmap);
-        }
-
-        if (zip != 0) {
-            result = ptr_to_jlong(zip);
-        } else if (msg != 0) {
-            ThrowZipException(env, msg);
-            free(msg);
-        } else if (errno == ENOMEM) {
-            JNU_ThrowOutOfMemoryError(env, 0);
-        } else {
-            ThrowZipException(env, "error in opening zip file");
-        }
-finally:
-        JNU_ReleaseStringPlatformChars(env, name, path);
-    }
-    return result;
-}
-
-JNIEXPORT jint JNICALL
-Java_java_util_zip_ZipFile_getTotal(JNIEnv *env, jclass cls, jlong zfile)
-{
-    jzfile *zip = jlong_to_ptr(zfile);
-
-    return zip->total;
-}
-
-JNIEXPORT jboolean JNICALL
-Java_java_util_zip_ZipFile_startsWithLOC(JNIEnv *env, jclass cls, jlong zfile)
-{
-    jzfile *zip = jlong_to_ptr(zfile);
-
-    return zip->locsig;
-}
-
-JNIEXPORT jint JNICALL
-Java_java_util_zip_ZipFile_getManifestNum(JNIEnv *env, jclass cls, jlong zfile)
-{
-    jzfile *zip = jlong_to_ptr(zfile);
-
-    return zip->manifestNum;
-}
-
-JNIEXPORT void JNICALL
-Java_java_util_zip_ZipFile_close(JNIEnv *env, jclass cls, jlong zfile)
-{
-    ZIP_Close(jlong_to_ptr(zfile));
-}
-
-JNIEXPORT jlong JNICALL
-Java_java_util_zip_ZipFile_getEntry(JNIEnv *env, jclass cls, jlong zfile,
-                                    jbyteArray name, jboolean addSlash)
-{
-#define MAXNAME 1024
-    jzfile *zip = jlong_to_ptr(zfile);
-    jsize ulen = (*env)->GetArrayLength(env, name);
-    char buf[MAXNAME+2], *path;
-    jzentry *ze;
-
-    if (ulen > MAXNAME) {
-        path = malloc(ulen + 2);
-        if (path == 0) {
-            JNU_ThrowOutOfMemoryError(env, 0);
-            return 0;
-        }
-    } else {
-        path = buf;
-    }
-    (*env)->GetByteArrayRegion(env, name, 0, ulen, (jbyte *)path);
-    path[ulen] = '\0';
-    ze = ZIP_GetEntry2(zip, path, (jint)ulen, addSlash);
-    if (path != buf) {
-        free(path);
-    }
-    return ptr_to_jlong(ze);
-}
-
-JNIEXPORT void JNICALL
-Java_java_util_zip_ZipFile_freeEntry(JNIEnv *env, jclass cls, jlong zfile,
-                                    jlong zentry)
-{
-    jzfile *zip = jlong_to_ptr(zfile);
-    jzentry *ze = jlong_to_ptr(zentry);
-    ZIP_FreeEntry(zip, ze);
-}
-
-JNIEXPORT jlong JNICALL
-Java_java_util_zip_ZipFile_getNextEntry(JNIEnv *env, jclass cls, jlong zfile,
-                                        jint n)
-{
-    jzentry *ze = ZIP_GetNextEntry(jlong_to_ptr(zfile), n);
-    return ptr_to_jlong(ze);
-}
-
-JNIEXPORT jint JNICALL
-Java_java_util_zip_ZipFile_getEntryMethod(JNIEnv *env, jclass cls, jlong zentry)
-{
-    jzentry *ze = jlong_to_ptr(zentry);
-    return ze->csize != 0 ? DEFLATED : STORED;
-}
-
-JNIEXPORT jint JNICALL
-Java_java_util_zip_ZipFile_getEntryFlag(JNIEnv *env, jclass cls, jlong zentry)
-{
-    jzentry *ze = jlong_to_ptr(zentry);
-    return ze->flag;
-}
-
-JNIEXPORT jlong JNICALL
-Java_java_util_zip_ZipFile_getEntryCSize(JNIEnv *env, jclass cls, jlong zentry)
-{
-    jzentry *ze = jlong_to_ptr(zentry);
-    return ze->csize != 0 ? ze->csize : ze->size;
-}
-
-JNIEXPORT jlong JNICALL
-Java_java_util_zip_ZipFile_getEntrySize(JNIEnv *env, jclass cls, jlong zentry)
-{
-    jzentry *ze = jlong_to_ptr(zentry);
-    return ze->size;
-}
-
-JNIEXPORT jlong JNICALL
-Java_java_util_zip_ZipFile_getEntryTime(JNIEnv *env, jclass cls, jlong zentry)
-{
-    jzentry *ze = jlong_to_ptr(zentry);
-    return (jlong)ze->time & 0xffffffffUL;
-}
-
-JNIEXPORT jlong JNICALL
-Java_java_util_zip_ZipFile_getEntryCrc(JNIEnv *env, jclass cls, jlong zentry)
-{
-    jzentry *ze = jlong_to_ptr(zentry);
-    return (jlong)ze->crc & 0xffffffffUL;
-}
-
-JNIEXPORT jbyteArray JNICALL
-Java_java_util_zip_ZipFile_getCommentBytes(JNIEnv *env,
-                                           jclass cls,
-                                           jlong zfile)
-{
-    jzfile *zip = jlong_to_ptr(zfile);
-    jbyteArray jba = NULL;
-
-    if (zip->comment != NULL) {
-        if ((jba = (*env)->NewByteArray(env, zip->clen)) == NULL)
-            return NULL;
-        (*env)->SetByteArrayRegion(env, jba, 0, zip->clen, (jbyte*)zip->comment);
-    }
-    return jba;
-}
-
-JNIEXPORT jbyteArray JNICALL
-Java_java_util_zip_ZipFile_getEntryBytes(JNIEnv *env,
-                                         jclass cls,
-                                         jlong zentry, jint type)
-{
-    jzentry *ze = jlong_to_ptr(zentry);
-    int len = 0;
-    jbyteArray jba = NULL;
-    switch (type) {
-    case java_util_zip_ZipFile_JZENTRY_NAME:
-        if (ze->name != 0) {
-            len = (int)ze->nlen;
-            if (len == 0 || (jba = (*env)->NewByteArray(env, len)) == NULL)
-                break;
-            (*env)->SetByteArrayRegion(env, jba, 0, len, (jbyte *)ze->name);
-        }
-        break;
-    case java_util_zip_ZipFile_JZENTRY_EXTRA:
-        if (ze->extra != 0) {
-            unsigned char *bp = (unsigned char *)&ze->extra[0];
-            len = (bp[0] | (bp[1] << 8));
-            if (len <= 0 || (jba = (*env)->NewByteArray(env, len)) == NULL)
-                break;
-            (*env)->SetByteArrayRegion(env, jba, 0, len, &ze->extra[2]);
-        }
-        break;
-    case java_util_zip_ZipFile_JZENTRY_COMMENT:
-        if (ze->comment != 0) {
-            len = (int)strlen(ze->comment);
-            if (len == 0 || (jba = (*env)->NewByteArray(env, len)) == NULL)
-                break;
-            (*env)->SetByteArrayRegion(env, jba, 0, len, (jbyte*)ze->comment);
-        }
-        break;
-    }
-    return jba;
-}
-
-JNIEXPORT jint JNICALL
-Java_java_util_zip_ZipFile_read(JNIEnv *env, jclass cls, jlong zfile,
-                                jlong zentry, jlong pos, jbyteArray bytes,
-                                jint off, jint len)
-{
-    jzfile *zip = jlong_to_ptr(zfile);
-    char *msg;
-
-#define BUFSIZE 8192
-    /* copy via tmp stack buffer: */
-    jbyte buf[BUFSIZE];
-
-    if (len > BUFSIZE) {
-        len = BUFSIZE;
-    }
-
-    ZIP_Lock(zip);
-    len = ZIP_Read(zip, jlong_to_ptr(zentry), pos, buf, len);
-    msg = zip->msg;
-    ZIP_Unlock(zip);
-    if (len != -1) {
-        (*env)->SetByteArrayRegion(env, bytes, off, len, buf);
-    }
-
-    if (len == -1) {
-        if (msg != 0) {
-            ThrowZipException(env, msg);
-        } else {
-            char errmsg[128];
-            sprintf(errmsg, "errno: %d, error: %s\n",
-                    errno, "Error reading ZIP file");
-            JNU_ThrowIOExceptionWithLastError(env, errmsg);
-        }
-    }
-
-    return len;
-}
-
-/*
- * Returns an array of strings representing the names of all entries
- * that begin with "META-INF/" (case ignored). This native method is
- * used in JarFile as an optimization when looking up manifest and
- * signature file entries. Returns null if no entries were found.
- */
-JNIEXPORT jobjectArray JNICALL
-Java_java_util_jar_JarFile_getMetaInfEntryNames(JNIEnv *env, jobject obj)
-{
-    jlong zfile = (*env)->GetLongField(env, obj, jzfileID);
-    jzfile *zip;
-    int i, count;
-    jobjectArray result = 0;
-
-    if (zfile == 0) {
-        JNU_ThrowByName(env,
-                        "java/lang/IllegalStateException", "zip file closed");
-        return NULL;
-    }
-    zip = jlong_to_ptr(zfile);
-
-    /* count the number of valid ZIP metanames */
-    count = 0;
-    if (zip->metanames != 0) {
-        for (i = 0; i < zip->metacount; i++) {
-            if (zip->metanames[i] != 0) {
-                count++;
-            }
-        }
-    }
-
-    /* If some names were found then build array of java strings */
-    if (count > 0) {
-        jclass cls = JNU_ClassString(env);
-        CHECK_NULL_RETURN(cls, NULL);
-        result = (*env)->NewObjectArray(env, count, cls, 0);
-        CHECK_NULL_RETURN(result, NULL);
-        if (result != 0) {
-            for (i = 0; i < count; i++) {
-                jstring str = (*env)->NewStringUTF(env, zip->metanames[i]);
-                if (str == 0) {
-                    break;
-                }
-                (*env)->SetObjectArrayElement(env, result, i, str);
-                (*env)->DeleteLocalRef(env, str);
-            }
-        }
-    }
-    return result;
-}
-
-JNIEXPORT jstring JNICALL
-Java_java_util_zip_ZipFile_getZipMessage(JNIEnv *env, jclass cls, jlong zfile)
-{
-    jzfile *zip = jlong_to_ptr(zfile);
-    char *msg = zip->msg;
-    if (msg == NULL) {
-        return NULL;
-    }
-    return JNU_NewStringPlatform(env, msg);
-}
diff --git a/jdk/src/share/native/java/util/zip/zip_util.c b/jdk/src/share/native/java/util/zip/zip_util.c
index ff59c5ecc..ffe094065 100644
--- a/jdk/src/share/native/java/util/zip/zip_util.c
+++ b/jdk/src/share/native/java/util/zip/zip_util.c
@@ -74,8 +74,6 @@ static void freeCEN(jzfile *);
 #define PATH_MAX 1024
 #endif
 
-#define META_INF_LEN 9 /* "META-INF/".length() */
-
 static jint INITIAL_META_COUNT = 2;   /* initial number of entries in meta name array */
 
 #ifdef LINUX
@@ -475,25 +473,6 @@ isMetaName(const char *name, int length)
     return 1;
 }
 
-/*
- * Check if the bytes represents a name equals to MANIFEST.MF
- */
-static int
-isManifestName(const char *name, int length)
-{
-    const char *s;
-    if (length != (int)sizeof("MANIFEST.MF") - 1)
-        return 0;
-    for (s = "MANIFEST.MF"; *s != '\0'; s++) {
-        char c = *name++;
-        // Avoid toupper; it's locale-dependent
-        if (c >= 'a' && c <= 'z') c += 'A' - 'a';
-        if (*s != c)
-            return 0;
-    }
-    return 1;
-}
-
 /*
  * Increases the capacity of zip->metanames.
  * Returns non-zero in case of allocation error.
@@ -564,7 +543,6 @@ freeCEN(jzfile *zip)
 {
     free(zip->entries); zip->entries = NULL;
     free(zip->table);   zip->table   = NULL;
-    zip->manifestNum = 0;
     freeMetaNames(zip);
 }
 
@@ -718,8 +696,6 @@ readCEN(jzfile *zip, jint knownTotal)
     for (j = 0; j < tablelen; j++)
         table[j] = ZIP_ENDCHAIN;
 
-    zip->manifestNum = 0;
-
     /* Iterate through the entries in the central directory */
     for (i = 0, cp = cenbuf; cp <= cenend - CENHDR; i++, cp += CENSIZE(cp)) {
         /* Following are unsigned 16-bit */
@@ -747,12 +723,9 @@ readCEN(jzfile *zip, jint knownTotal)
             ZIP_FORMAT_ERROR("invalid CEN header (bad header size)");
 
         /* if the entry is metadata add it to our metadata names */
-        if (isMetaName((char *)cp+CENHDR, nlen)) {
-            if (isManifestName((char *)cp+CENHDR+META_INF_LEN, nlen-META_INF_LEN))
-                zip->manifestNum++;
+        if (isMetaName((char *)cp+CENHDR, nlen))
             if (addMetaName(zip, (char *)cp+CENHDR, nlen) != 0)
                 goto Catch;
-        }
 
         /* Record the CEN offset and the name hash in our hash cell. */
         entries[i].cenpos = cenpos + (cp - cenbuf);
diff --git a/jdk/src/share/native/java/util/zip/zip_util.h b/jdk/src/share/native/java/util/zip/zip_util.h
index 2a7ae4b7e..a64668cd6 100644
--- a/jdk/src/share/native/java/util/zip/zip_util.h
+++ b/jdk/src/share/native/java/util/zip/zip_util.h
@@ -229,7 +229,6 @@ typedef struct jzfile {   /* Zip file */
     char **metanames;     /* array of meta names (may have null names) */
     jint metacurrent;     /* the next empty slot in metanames array */
     jint metacount;       /* number of slots in metanames array */
-    jint manifestNum;     /* number of META-INF/MANIFEST.MF, case insensitive */
     jlong lastModified;   /* last modified time */
     jlong locpos;         /* position of first LOC header (usually 0) */
 } jzfile;
diff --git a/jdk/test/java/nio/file/spi/TestProvider.java b/jdk/test/java/nio/file/spi/TestProvider.java
index b2744f4c0..c975b8e27 100644
--- a/jdk/test/java/nio/file/spi/TestProvider.java
+++ b/jdk/test/java/nio/file/spi/TestProvider.java
@@ -21,20 +21,34 @@
  * questions.
  */
 
-import java.nio.file.spi.FileSystemProvider;
+import java.io.File;
 import java.nio.file.*;
-import java.nio.file.attribute.*;
+import java.nio.file.attribute.BasicFileAttributes;
+import java.nio.file.attribute.FileAttribute;
+import java.nio.file.attribute.FileAttributeView;
+import java.nio.file.attribute.UserPrincipalLookupService;
+import java.nio.file.spi.FileSystemProvider;
 import java.nio.channels.SeekableByteChannel;
 import java.net.URI;
-import java.util.*;
 import java.io.IOException;
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.Set;
 
 public class TestProvider extends FileSystemProvider {
 
-    private final FileSystem theFileSystem;
+    private final FileSystemProvider defaultProvider;
+    private final TestFileSystem theFileSystem;
 
     public TestProvider(FileSystemProvider defaultProvider) {
-        theFileSystem = new TestFileSystem(this);
+        this.defaultProvider = defaultProvider;
+        FileSystem fs = defaultProvider.getFileSystem(URI.create("file:/"));
+        this.theFileSystem = new TestFileSystem(fs, this);
+    }
+
+    FileSystemProvider defaultProvider() {
+        return defaultProvider;
     }
 
     @Override
@@ -43,8 +57,8 @@ public class TestProvider extends FileSystemProvider {
     }
 
     @Override
-    public FileSystem newFileSystem(URI uri, Map<String,?> env) {
-        throw new RuntimeException("not implemented");
+    public FileSystem newFileSystem(URI uri, Map<String,?> env) throws IOException {
+        return defaultProvider.newFileSystem(uri, env);
     }
 
     @Override
@@ -54,7 +68,8 @@ public class TestProvider extends FileSystemProvider {
 
     @Override
     public Path getPath(URI uri) {
-        throw new RuntimeException("not implemented");
+        Path path = defaultProvider.getPath(uri);
+        return theFileSystem.wrap(path);
     }
 
     @Override
@@ -70,7 +85,8 @@ public class TestProvider extends FileSystemProvider {
                                              LinkOption... options)
         throws IOException
     {
-        throw new RuntimeException("not implemented");
+        Path delegate = theFileSystem.unwrap(file);
+        return defaultProvider.readAttributes(delegate, attributes, options);
     }
 
     @Override
@@ -79,7 +95,8 @@ public class TestProvider extends FileSystemProvider {
                                                             LinkOption... options)
         throws IOException
     {
-        throw new RuntimeException("not implemented");
+        Path delegate = theFileSystem.unwrap(file);
+        return defaultProvider.readAttributes(delegate, type, options);
     }
 
     @Override
@@ -87,13 +104,14 @@ public class TestProvider extends FileSystemProvider {
                                                                 Class<V> type,
                                                                 LinkOption... options)
     {
-        throw new RuntimeException("not implemented");
+        Path delegate = theFileSystem.unwrap(file);
+        return defaultProvider.getFileAttributeView(delegate, type, options);
     }
 
-
     @Override
     public void delete(Path file) throws IOException {
-        throw new RuntimeException("not implemented");
+        Path delegate = theFileSystem.unwrap(file);
+        defaultProvider.delete(delegate);
     }
 
     @Override
@@ -110,10 +128,11 @@ public class TestProvider extends FileSystemProvider {
 
     @Override
     public Path readSymbolicLink(Path link) throws IOException {
-        throw new RuntimeException("not implemented");
+        Path delegate = theFileSystem.unwrap(link);
+        Path target = defaultProvider.readSymbolicLink(delegate);
+        return theFileSystem.wrap(target);
     }
 
-
     @Override
     public void copy(Path source, Path target, CopyOption... options)
         throws IOException
@@ -140,7 +159,8 @@ public class TestProvider extends FileSystemProvider {
     public void createDirectory(Path dir, FileAttribute<?>... attrs)
         throws IOException
     {
-        throw new RuntimeException("not implemented");
+        Path delegate = theFileSystem.unwrap(dir);
+        defaultProvider.createDirectory(delegate, attrs);
     }
 
     @Override
@@ -149,13 +169,13 @@ public class TestProvider extends FileSystemProvider {
                                               FileAttribute<?>... attrs)
         throws IOException
     {
-        throw new RuntimeException("not implemented");
+        Path delegate = theFileSystem.unwrap(file);
+        return defaultProvider.newByteChannel(delegate, options, attrs);
     }
 
-
     @Override
     public boolean isHidden(Path file) throws IOException {
-        throw new RuntimeException("not implemented");
+        throw new ReadOnlyFileSystemException();
     }
 
     @Override
@@ -176,12 +196,26 @@ public class TestProvider extends FileSystemProvider {
     }
 
     static class TestFileSystem extends FileSystem {
+        private final FileSystem delegate;
         private final TestProvider provider;
 
-        TestFileSystem(TestProvider provider) {
+        TestFileSystem(FileSystem delegate, TestProvider provider) {
+            this.delegate = delegate;
             this.provider = provider;
         }
 
+        Path wrap(Path path) {
+            return (path != null) ? new TestPath(this, path) : null;
+        }
+
+        Path unwrap(Path wrapper) {
+            if (wrapper == null)
+                throw new NullPointerException();
+            if (!(wrapper instanceof TestPath))
+                throw new ProviderMismatchException();
+            return ((TestPath)wrapper).unwrap();
+        }
+
         @Override
         public FileSystemProvider provider() {
             return provider;
@@ -194,17 +228,17 @@ public class TestProvider extends FileSystemProvider {
 
         @Override
         public boolean isOpen() {
-            throw new RuntimeException("not implemented");
+            return true;
         }
 
         @Override
         public boolean isReadOnly() {
-            throw new RuntimeException("not implemented");
+            return false;
         }
 
         @Override
         public String getSeparator() {
-            throw new RuntimeException("not implemented");
+            return delegate.getSeparator();
         }
 
         @Override
@@ -219,27 +253,209 @@ public class TestProvider extends FileSystemProvider {
 
         @Override
         public Set<String> supportedFileAttributeViews() {
-            throw new RuntimeException("not implemented");
+            return delegate.supportedFileAttributeViews();
         }
 
         @Override
         public Path getPath(String first, String... more) {
-            throw new RuntimeException("not implemented");
+            Path path = delegate.getPath(first, more);
+            return wrap(path);
         }
 
         @Override
         public PathMatcher getPathMatcher(String syntaxAndPattern) {
-            throw new RuntimeException("not implemented");
+            return delegate.getPathMatcher(syntaxAndPattern);
         }
 
         @Override
         public UserPrincipalLookupService getUserPrincipalLookupService() {
-            throw new RuntimeException("not implemented");
+            return delegate.getUserPrincipalLookupService();
         }
 
         @Override
         public WatchService newWatchService() throws IOException {
-            throw new RuntimeException("not implemented");
+            throw new UnsupportedOperationException();
+        }
+    }
+
+    static class TestPath implements Path {
+        private final TestFileSystem fs;
+        private final Path delegate;
+
+        TestPath(TestFileSystem fs, Path delegate) {
+            this.fs = fs;
+            this.delegate = delegate;
+        }
+
+        Path unwrap() {
+            return delegate;
+        }
+
+        @Override
+        public FileSystem getFileSystem() {
+            return fs;
+        }
+
+        @Override
+        public boolean isAbsolute() {
+            return delegate.isAbsolute();
+        }
+
+        @Override
+        public Path getRoot() {
+            return fs.wrap(delegate.getRoot());
+        }
+
+        @Override
+        public Path getParent() {
+            return fs.wrap(delegate.getParent());
+        }
+
+        @Override
+        public int getNameCount() {
+            return delegate.getNameCount();
+        }
+
+        @Override
+        public Path getFileName() {
+            return fs.wrap(delegate.getFileName());
+        }
+
+        @Override
+        public Path getName(int index) {
+            return fs.wrap(delegate.getName(index));
+        }
+
+        @Override
+        public Path subpath(int beginIndex, int endIndex) {
+            return fs.wrap(delegate.subpath(beginIndex, endIndex));
+        }
+
+        @Override
+        public boolean startsWith(Path other) {
+            return delegate.startsWith(fs.unwrap(other));
+        }
+
+        @Override
+        public boolean startsWith(String other) {
+            return delegate.startsWith(other);
+        }
+
+        @Override
+        public boolean endsWith(Path other) {
+            return delegate.endsWith(fs.unwrap(other));
+        }
+
+        @Override
+        public boolean endsWith(String other) {
+            return delegate.endsWith(other);
+        }
+
+        @Override
+        public Path normalize() {
+            return fs.wrap(delegate.normalize());
+        }
+
+        @Override
+        public Path resolve(Path other) {
+            return fs.wrap(delegate.resolve(fs.unwrap(other)));
+        }
+
+        @Override
+        public Path resolve(String other) {
+            return fs.wrap(delegate.resolve(other));
+        }
+
+        @Override
+        public Path resolveSibling(Path other) {
+            return fs.wrap(delegate.resolveSibling(fs.unwrap(other)));
+        }
+
+        @Override
+        public Path resolveSibling(String other) {
+            return fs.wrap(delegate.resolveSibling(other));
+        }
+
+        @Override
+        public Path relativize(Path other) {
+            return fs.wrap(delegate.relativize(fs.unwrap(other)));
+        }
+
+        @Override
+        public boolean equals(Object other) {
+            if (!(other instanceof TestPath))
+                return false;
+            return delegate.equals(fs.unwrap((TestPath) other));
+        }
+
+        @Override
+        public int hashCode() {
+            return delegate.hashCode();
+        }
+
+        @Override
+        public String toString() {
+            return delegate.toString();
+        }
+
+        @Override
+        public URI toUri() {
+            String ssp = delegate.toUri().getSchemeSpecificPart();
+            return URI.create(fs.provider().getScheme() + ":" + ssp);
+        }
+
+        @Override
+        public Path toAbsolutePath() {
+            return fs.wrap(delegate.toAbsolutePath());
+        }
+
+        @Override
+        public Path toRealPath(LinkOption... options) throws IOException {
+            return fs.wrap(delegate.toRealPath(options));
+        }
+
+        @Override
+        public File toFile() {
+            return new File(toString());
+        }
+
+        @Override
+        public Iterator<Path> iterator() {
+            final Iterator<Path> itr = delegate.iterator();
+            return new Iterator<Path>() {
+                @Override
+                public boolean hasNext() {
+                    return itr.hasNext();
+                }
+                @Override
+                public Path next() {
+                    return fs.wrap(itr.next());
+                }
+                @Override
+                public void remove() {
+                    itr.remove();
+                }
+            };
+        }
+
+        @Override
+        public int compareTo(Path other) {
+            return delegate.compareTo(fs.unwrap(other));
+        }
+
+        @Override
+        public WatchKey register(WatchService watcher,
+                                 WatchEvent.Kind<?>[] events,
+                                 WatchEvent.Modifier... modifiers)
+        {
+            throw new UnsupportedOperationException();
+        }
+
+        @Override
+        public  WatchKey register(WatchService watcher,
+                                  WatchEvent.Kind<?>... events)
+        {
+            throw new UnsupportedOperationException();
         }
     }
-}
+}
\ No newline at end of file
diff --git a/jdk/test/java/util/zip/ZipFile/TestZipFile.java b/jdk/test/java/util/zip/ZipFile/TestZipFile.java
new file mode 100644
index 000000000..30bae3bb9
--- /dev/null
+++ b/jdk/test/java/util/zip/ZipFile/TestZipFile.java
@@ -0,0 +1,375 @@
+/*
+ * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, Huawei Technologies Co., Ltd. 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 8142508
+ * @summary Tests various ZipFile apis
+ * @run main/manual TestZipFile
+ */
+
+import java.io.*;
+import java.lang.reflect.Method;
+import java.nio.file.*;
+import java.nio.file.attribute.*;
+import java.util.*;
+import java.util.concurrent.*;
+import java.util.zip.*;
+
+public class TestZipFile {
+
+    private static Random r = new Random();
+    private static int    N = 50;
+    private static int    NN = 10;
+    private static int    ENUM = 10000;
+    private static int    ESZ = 10000;
+    private static ExecutorService executor = Executors.newFixedThreadPool(20);
+    private static Set<Path> paths = new HashSet<>();
+
+    static void realMain (String[] args) throws Throwable {
+
+        try {
+            for (int i = 0; i < N; i++) {
+                test(r.nextInt(ENUM), r.nextInt(ESZ), false, true);
+                test(r.nextInt(ENUM), r.nextInt(ESZ), true, true);
+            }
+
+            for (int i = 0; i < NN; i++) {
+                test(r.nextInt(ENUM), 100000 + r.nextInt(ESZ), false, true);
+                test(r.nextInt(ENUM), 100000 + r.nextInt(ESZ), true, true);
+                testCachedDelete();
+                testCachedOverwrite();
+                //test(r.nextInt(ENUM), r.nextInt(ESZ), false, true);
+            }
+
+            test(70000, 1000, false, true);   // > 65536 entry number;
+            testDelete();                     // OPEN_DELETE
+
+            executor.shutdown();
+            executor.awaitTermination(10, TimeUnit.MINUTES);
+        } finally {
+            for (Path path : paths) {
+                Files.deleteIfExists(path);
+            }
+        }
+    }
+
+    static void test(int numEntry, int szMax, boolean addPrefix, boolean cleanOld) {
+        String name = "zftest" + r.nextInt() + ".zip";
+        Zip zip = new Zip(name, numEntry, szMax, addPrefix, cleanOld);
+        for (int i = 0; i < NN; i++) {
+            executor.submit(() -> doTest(zip));
+        }
+     }
+
+    // test scenario:
+    // (1) open the ZipFile(zip) with OPEN_READ | OPEN_DELETE
+    // (2) test the ZipFile works correctly
+    // (3) check the zip is deleted after ZipFile gets closed
+    static void testDelete() throws Throwable {
+        String name = "zftest" + r.nextInt() + ".zip";
+        Zip zip = new Zip(name, r.nextInt(ENUM), r.nextInt(ESZ), false, true);
+        try (ZipFile zf = new ZipFile(new File(zip.name),
+                                      ZipFile.OPEN_READ | ZipFile.OPEN_DELETE ))
+        {
+            doTest0(zip, zf);
+        }
+        Path p = Paths.get(name);
+        if (Files.exists(p)) {
+            fail("Failed to delete " + name + " with OPEN_DELETE");
+        }
+    }
+
+    // test scenario:
+    // (1) keep a ZipFile(zip1) alive (in ZipFile's cache), dont close it
+    // (2) delete zip1 and create zip2 with the same name the zip1 with zip2
+    // (3) zip1 tests should fail, but no crash
+    // (4) zip2 tasks should all get zip2, then pass normal testing.
+    static void testCachedDelete() throws Throwable {
+        String name = "zftest" + r.nextInt() + ".zip";
+        Zip zip1 = new Zip(name, r.nextInt(ENUM), r.nextInt(ESZ), false, true);
+
+        try (ZipFile zf = new ZipFile(zip1.name)) {
+            for (int i = 0; i < NN; i++) {
+                executor.submit(() -> verifyNoCrash(zip1));
+            }
+            // delete the "zip1"  and create a new one to test
+            Zip zip2 = new Zip(name, r.nextInt(ENUM), r.nextInt(ESZ), false, true);
+            /*
+                System.out.println("========================================");
+                System.out.printf("    zip1=%s, mt=%d, enum=%d%n    ->attrs=[key=%s, sz=%d, mt=%d]%n",
+                    zip1.name, zip1.lastModified, zip1.entries.size(),
+                    zip1.attrs.fileKey(), zip1.attrs.size(), zip1.attrs.lastModifiedTime().toMillis());
+                System.out.printf("    zip2=%s, mt=%d, enum=%d%n    ->attrs=[key=%s, sz=%d, mt=%d]%n",
+                    zip2.name, zip2.lastModified, zip2.entries.size(),
+                    zip2.attrs.fileKey(), zip2.attrs.size(), zip2.attrs.lastModifiedTime().toMillis());
+            */
+            for (int i = 0; i < NN; i++) {
+                executor.submit(() -> doTest(zip2));
+            }
+        }
+    }
+
+   // overwrite the "zip1"  and create a new one to test. So the two zip files
+   // have the same fileKey, but probably different lastModified()
+    static void testCachedOverwrite() throws Throwable {
+        String name = "zftest" + r.nextInt() + ".zip";
+        Zip zip1 = new Zip(name, r.nextInt(ENUM), r.nextInt(ESZ), false, true);
+        try (ZipFile zf = new ZipFile(zip1.name)) {
+            for (int i = 0; i < NN; i++) {
+                executor.submit(() -> verifyNoCrash(zip1));
+            }
+            // overwrite the "zip1"  with new contents
+            Zip zip2 = new Zip(name, r.nextInt(ENUM), r.nextInt(ESZ), false, false);
+            for (int i = 0; i < NN; i++) {
+                executor.submit(() -> doTest(zip2));
+            }
+        }
+    }
+
+    // This method is used to replace the InputStream.readAllBytes method(need JDK version >= 9).
+    public static byte[] readAllBytes(InputStream inputStream) throws IOException {
+        byte[] buffer = new byte[1024];
+        int len;
+        try (ByteArrayOutputStream outputStream = new ByteArrayOutputStream()) {
+            while ((len = inputStream.read(buffer)) > -1) {
+                outputStream.write(buffer, 0, len);
+            }
+            return outputStream.toByteArray();
+        } catch (IOException e) {
+            throw e;
+        }
+    }
+
+    // just check the entries and contents. since the file has been either overwritten
+    // or deleted/rewritten, we only care if it crahes or not.
+    static void verifyNoCrash(Zip zip) throws RuntimeException {
+        try (ZipFile zf = new ZipFile(zip.name)) {
+            List<ZipEntry> zlist = new ArrayList(zip.entries.keySet());
+            String[] elist = zf.stream().map( e -> e.getName()).toArray(String[]::new);
+            if (!Arrays.equals(elist,
+                               zlist.stream().map( e -> e.getName()).toArray(String[]::new)))
+            {
+                //System.out.printf("++++++ LIST NG [%s] entries.len=%d, expected=%d+++++++%n",
+                //                  zf.getName(), elist.length, zlist.size());
+                return;
+            }
+            for (ZipEntry ze : zlist) {
+                byte[] zdata = zip.entries.get(ze);
+                ZipEntry e = zf.getEntry(ze.getName());
+                if (e != null) {
+                    checkEqual(e, ze);
+                    if (!e.isDirectory()) {
+                        // check with readAllBytes
+                        try (InputStream is = zf.getInputStream(e)) {
+                            if (!Arrays.equals(zdata, readAllBytes(is))) {
+                                //System.out.printf("++++++ BYTES NG  [%s]/[%s] ++++++++%n",
+                                //                  zf.getName(), ze.getName());
+                            }
+                        }
+                    }
+                }
+            }
+        } catch (Throwable t) {
+            // t.printStackTrace();
+            // fail(t.toString());
+        }
+    }
+
+    static void checkEqual(ZipEntry x, ZipEntry y) {
+        if (x.getName().equals(y.getName()) &&
+            x.isDirectory() == y.isDirectory() &&
+            x.getMethod() == y.getMethod() &&
+            (x.getTime() / 2000) == y.getTime() / 2000 &&
+            x.getSize() == y.getSize() &&
+            x.getCompressedSize() == y.getCompressedSize() &&
+            x.getCrc() == y.getCrc() &&
+            x.getComment().equals(y.getComment())
+        ) {
+            pass();
+        } else {
+            fail(x + " not equal to " + y);
+            System.out.printf("      %s       %s%n", x.getName(), y.getName());
+            System.out.printf("      %d       %d%n", x.getMethod(), y.getMethod());
+            System.out.printf("      %d       %d%n", x.getTime(), y.getTime());
+            System.out.printf("      %d       %d%n", x.getSize(), y.getSize());
+            System.out.printf("      %d       %d%n", x.getCompressedSize(), y.getCompressedSize());
+            System.out.printf("      %d       %d%n", x.getCrc(), y.getCrc());
+            System.out.println("-----------------");
+        }
+    }
+
+    static void doTest(Zip zip) throws RuntimeException {
+        //Thread me = Thread.currentThread();
+        try (ZipFile zf = new ZipFile(zip.name)) {
+            doTest0(zip, zf);
+        } catch (Throwable t) {
+            throw new RuntimeException(t);
+        }
+    }
+
+    static void doTest0(Zip zip, ZipFile zf) throws Throwable {
+        List<ZipEntry> list = new ArrayList(zip.entries.keySet());
+        // (1) check entry list, in expected order
+        if (!check(Arrays.equals(
+                list.stream().map( e -> e.getName()).toArray(String[]::new),
+                zf.stream().map( e -> e.getName()).toArray(String[]::new)))) {
+            return;
+        }
+        // (2) shuffle, and check each entry and its bytes
+        Collections.shuffle(list);
+        for (ZipEntry ze : list) {
+            byte[] data = zip.entries.get(ze);
+            ZipEntry e = zf.getEntry(ze.getName());
+            checkEqual(e, ze);
+            if (!e.isDirectory()) {
+                // check with readAllBytes
+                try (InputStream is = zf.getInputStream(e)) {
+                    check(Arrays.equals(data, readAllBytes(is)));
+                }
+                // check with smaller sized buf
+                try (InputStream is = zf.getInputStream(e)) {
+                    byte[] buf = new byte[(int)e.getSize()];
+                    int sz = r.nextInt((int)e.getSize()/4 + 1) + 1;
+                    int off = 0;
+                    int n;
+                    while ((n = is.read(buf, off, buf.length - off)) > 0) {
+                        off += n;
+                    }
+                    check(is.read() == -1);
+                    check(Arrays.equals(data, buf));
+                }
+            }
+        }
+        // (3) check getMetaInfEntryNames
+        String[] metas = list.stream()
+                             .map( e -> e.getName())
+                             .filter( s -> s.startsWith("META-INF/"))
+                             .sorted()
+                             .toArray(String[]::new);
+        if (metas.length > 0) {
+            // meta-inf entries
+            Method getMetas = ZipFile.class.getDeclaredMethod("getMetaInfEntryNames");
+            getMetas.setAccessible(true);
+            String[] names = (String[])getMetas.invoke(zf);
+            if (names == null) {
+                fail("Failed to get metanames from " + zf);
+            } else {
+                Arrays.sort(names);
+                check(Arrays.equals(names, metas));
+            }
+        }
+    }
+
+    private static class Zip {
+        String name;
+        Map<ZipEntry, byte[]> entries;
+        BasicFileAttributes attrs;
+        long lastModified;
+
+        Zip(String name, int num, int szMax, boolean prefix, boolean clean) {
+            this.name = name;
+            entries = new LinkedHashMap<>(num);
+            try {
+                Path p = Paths.get(name);
+                if (clean) {
+                    Files.deleteIfExists(p);
+                }
+                paths.add(p);
+            } catch (Exception x) {
+                throw (RuntimeException)x;
+            }
+
+            try (FileOutputStream fos = new FileOutputStream(name);
+                 BufferedOutputStream bos = new BufferedOutputStream(fos);
+                 ZipOutputStream zos = new ZipOutputStream(bos))
+            {
+                if (prefix) {
+                    byte[] bytes = new byte[r.nextInt(1000)];
+                    r.nextBytes(bytes);
+                    bos.write(bytes);
+                }
+                CRC32 crc = new CRC32();
+                for (int i = 0; i < num; i++) {
+                    String ename = "entry-" + i + "-name-" + r.nextLong();
+                    ZipEntry ze = new ZipEntry(ename);
+                    int method = r.nextBoolean() ? ZipEntry.STORED : ZipEntry.DEFLATED;
+                    writeEntry(zos, crc, ze, ZipEntry.STORED, szMax);
+                }
+                // add some manifest entries
+                for (int i = 0; i < r.nextInt(20); i++) {
+                    String meta = "META-INF/" + "entry-" + i + "-metainf-" + r.nextLong();
+                    ZipEntry ze = new ZipEntry(meta);
+                    writeEntry(zos, crc, ze, ZipEntry.STORED, szMax);
+                }
+            } catch (Exception x) {
+                throw (RuntimeException)x;
+            }
+            try {
+                this.attrs = Files.readAttributes(Paths.get(name), BasicFileAttributes.class);
+                this.lastModified = new File(name).lastModified();
+            } catch (Exception x) {
+                throw (RuntimeException)x;
+            }
+        }
+
+        private void writeEntry(ZipOutputStream zos, CRC32 crc,
+                                ZipEntry ze, int method, int szMax)
+            throws IOException
+        {
+            ze.setMethod(method);
+            byte[] data = new byte[r.nextInt(szMax + 1)];
+            r.nextBytes(data);
+            if (method == ZipEntry.STORED) {  // must set size/csize/crc
+                ze.setSize(data.length);
+                ze.setCompressedSize(data.length);
+                crc.reset();
+                crc.update(data);
+                ze.setCrc(crc.getValue());
+            }
+            ze.setTime(System.currentTimeMillis());
+            ze.setComment(ze.getName());
+            zos.putNextEntry(ze);
+            zos.write(data);
+            zos.closeEntry();
+            entries.put(ze, data);
+        }
+    }
+
+    //--------------------- Infrastructure ---------------------------
+    static volatile int passed = 0, failed = 0;
+    static void pass() {passed++;}
+    static void pass(String msg) {System.out.println(msg); passed++;}
+    static void fail() {failed++; Thread.dumpStack();}
+    static void fail(String msg) {System.out.println(msg); fail();}
+    static void unexpected(Throwable t) {failed++; t.printStackTrace();}
+    static void unexpected(Throwable t, String msg) {
+        System.out.println(msg); failed++; t.printStackTrace();}
+    static boolean check(boolean cond) {if (cond) pass(); else fail(); return cond;}
+
+    public static void main(String[] args) throws Throwable {
+        try {realMain(args);} catch (Throwable t) {unexpected(t);}
+        System.out.println("\nPassed = " + passed + " failed = " + failed);
+        if (failed > 0) throw new AssertionError("Some tests failed");}
+}
\ No newline at end of file
diff --git a/jdk/test/javax/imageio/plugins/png/ItxtUtf8Test.java b/jdk/test/javax/imageio/plugins/png/ItxtUtf8Test.java
index 89853c639..74938bcda 100644
--- a/jdk/test/javax/imageio/plugins/png/ItxtUtf8Test.java
+++ b/jdk/test/javax/imageio/plugins/png/ItxtUtf8Test.java
@@ -30,7 +30,7 @@
  *
  * @run main ItxtUtf8Test
  *
- * @run main/othervm/timeout=10 -Xmx2m ItxtUtf8Test truncate
+ * @run main/othervm/timeout=10 -Xmx4m ItxtUtf8Test truncate
  */
 
 import java.awt.image.BufferedImage;
-- 
2.22.0