mirror of
https://github.com/openjdk/jdk.git
synced 2025-08-26 14:24:46 +02:00
8341594: Use Unsafe to coalesce reads in java.util.zip.ZipUtils
Reviewed-by: lancea
This commit is contained in:
Claes Redestad
parent
57c859e4ad
commit
ffb60e55cd
5 changed files with 96 additions and 100 deletions
|
|
@ -564,20 +564,20 @@ public class ZipEntry implements ZipConstants, Cloneable {
|
|||
// be the magic value and it "accidentally" has some
|
||||
// bytes in extra match the id.
|
||||
if (sz >= 16) {
|
||||
size = get64(extra, off);
|
||||
csize = get64(extra, off + 8);
|
||||
size = get64S(extra, off);
|
||||
csize = get64S(extra, off + 8);
|
||||
}
|
||||
} else {
|
||||
// CEN extra zip64
|
||||
if (size == ZIP64_MAGICVAL) {
|
||||
if (off + 8 > len) // invalid zip64 extra
|
||||
break; // fields, just skip
|
||||
size = get64(extra, off);
|
||||
size = get64S(extra, off);
|
||||
}
|
||||
if (csize == ZIP64_MAGICVAL) {
|
||||
if (off + 16 > len) // invalid zip64 extra
|
||||
break; // fields, just skip
|
||||
csize = get64(extra, off + 8);
|
||||
csize = get64S(extra, off + 8);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -588,15 +588,15 @@ public class ZipEntry implements ZipConstants, Cloneable {
|
|||
int pos = off + 4; // reserved 4 bytes
|
||||
if (get16(extra, pos) != 0x0001 || get16(extra, pos + 2) != 24)
|
||||
break;
|
||||
long wtime = get64(extra, pos + 4);
|
||||
long wtime = get64S(extra, pos + 4);
|
||||
if (wtime != WINDOWS_TIME_NOT_AVAILABLE) {
|
||||
mtime = winTimeToFileTime(wtime);
|
||||
}
|
||||
wtime = get64(extra, pos + 12);
|
||||
wtime = get64S(extra, pos + 12);
|
||||
if (wtime != WINDOWS_TIME_NOT_AVAILABLE) {
|
||||
atime = winTimeToFileTime(wtime);
|
||||
}
|
||||
wtime = get64(extra, pos + 20);
|
||||
wtime = get64S(extra, pos + 20);
|
||||
if (wtime != WINDOWS_TIME_NOT_AVAILABLE) {
|
||||
ctime = winTimeToFileTime(wtime);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -906,21 +906,21 @@ public class ZipFile implements ZipConstants, Closeable {
|
|||
if (size == ZIP64_MAGICVAL) {
|
||||
if (sz < 8 || (off + 8) > end)
|
||||
break;
|
||||
size = get64(cen, off);
|
||||
size = get64S(cen, off);
|
||||
sz -= 8;
|
||||
off += 8;
|
||||
}
|
||||
if (rem == ZIP64_MAGICVAL) {
|
||||
if (sz < 8 || (off + 8) > end)
|
||||
break;
|
||||
rem = get64(cen, off);
|
||||
rem = get64S(cen, off);
|
||||
sz -= 8;
|
||||
off += 8;
|
||||
}
|
||||
if (pos == ZIP64_MAGICVAL) {
|
||||
if (sz < 8 || (off + 8) > end)
|
||||
break;
|
||||
pos = get64(cen, off);
|
||||
pos = get64S(cen, off);
|
||||
sz -= 8;
|
||||
off += 8;
|
||||
}
|
||||
|
|
@ -1376,7 +1376,7 @@ public class ZipFile implements ZipConstants, Closeable {
|
|||
// Check the uncompressed size is not negative
|
||||
if (size == ZIP64_MAGICVAL) {
|
||||
if ( blockSize >= Long.BYTES) {
|
||||
if (get64(cen, off) < 0) {
|
||||
if (get64S(cen, off) < 0) {
|
||||
zerror("Invalid zip64 extra block size value");
|
||||
}
|
||||
off += Long.BYTES;
|
||||
|
|
@ -1388,7 +1388,7 @@ public class ZipFile implements ZipConstants, Closeable {
|
|||
// Check the compressed size is not negative
|
||||
if (csize == ZIP64_MAGICVAL) {
|
||||
if (blockSize >= Long.BYTES) {
|
||||
if (get64(cen, off) < 0) {
|
||||
if (get64S(cen, off) < 0) {
|
||||
zerror("Invalid zip64 extra block compressed size value");
|
||||
}
|
||||
off += Long.BYTES;
|
||||
|
|
@ -1400,7 +1400,7 @@ public class ZipFile implements ZipConstants, Closeable {
|
|||
// Check the LOC offset is not negative
|
||||
if (locoff == ZIP64_MAGICVAL) {
|
||||
if (blockSize >= Long.BYTES) {
|
||||
if (get64(cen, off) < 0) {
|
||||
if (get64S(cen, off) < 0) {
|
||||
zerror("Invalid zip64 extra block LOC OFFSET value");
|
||||
}
|
||||
// Note: We do not need to adjust the following fields as
|
||||
|
|
@ -1641,10 +1641,7 @@ public class ZipFile implements ZipConstants, Closeable {
|
|||
}
|
||||
// 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') {
|
||||
if (get32(buf, i) == ENDSIG) {
|
||||
// Found ENDSIG header
|
||||
byte[] endbuf = Arrays.copyOfRange(buf, i, i + ENDHDR);
|
||||
end.centot = ENDTOT(endbuf);
|
||||
|
|
@ -1664,9 +1661,9 @@ public class ZipFile implements ZipConstants, Closeable {
|
|||
if (cenpos < 0 ||
|
||||
locpos < 0 ||
|
||||
readFullyAt(sbuf, 0, sbuf.length, cenpos) != 4 ||
|
||||
GETSIG(sbuf) != CENSIG ||
|
||||
get32(sbuf, 0) != CENSIG ||
|
||||
readFullyAt(sbuf, 0, sbuf.length, locpos) != 4 ||
|
||||
GETSIG(sbuf) != LOCSIG) {
|
||||
get32(sbuf, 0) != LOCSIG) {
|
||||
continue;
|
||||
}
|
||||
}
|
||||
|
|
@ -1681,13 +1678,13 @@ public class ZipFile implements ZipConstants, Closeable {
|
|||
byte[] loc64 = new byte[ZIP64_LOCHDR];
|
||||
if (end.endpos < ZIP64_LOCHDR ||
|
||||
readFullyAt(loc64, 0, loc64.length, end.endpos - ZIP64_LOCHDR)
|
||||
!= loc64.length || GETSIG(loc64) != ZIP64_LOCSIG) {
|
||||
!= loc64.length || get32(loc64, 0) != 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) {
|
||||
!= end64buf.length || get32(end64buf, 0) != ZIP64_ENDSIG) {
|
||||
return end;
|
||||
}
|
||||
// end64 candidate found,
|
||||
|
|
|
|||
|
|
@ -603,14 +603,14 @@ public class ZipInputStream extends InflaterInputStream implements ZipConstants
|
|||
long sig = get32(tmpbuf, 0);
|
||||
if (sig != EXTSIG) { // no EXTSIG present
|
||||
e.crc = sig;
|
||||
e.csize = get64(tmpbuf, ZIP64_EXTSIZ - ZIP64_EXTCRC);
|
||||
e.size = get64(tmpbuf, ZIP64_EXTLEN - ZIP64_EXTCRC);
|
||||
e.csize = get64S(tmpbuf, ZIP64_EXTSIZ - ZIP64_EXTCRC);
|
||||
e.size = get64S(tmpbuf, ZIP64_EXTLEN - ZIP64_EXTCRC);
|
||||
((PushbackInputStream)in).unread(
|
||||
tmpbuf, ZIP64_EXTHDR - ZIP64_EXTCRC, ZIP64_EXTCRC);
|
||||
} else {
|
||||
e.crc = get32(tmpbuf, ZIP64_EXTCRC);
|
||||
e.csize = get64(tmpbuf, ZIP64_EXTSIZ);
|
||||
e.size = get64(tmpbuf, ZIP64_EXTLEN);
|
||||
e.csize = get64S(tmpbuf, ZIP64_EXTSIZ);
|
||||
e.size = get64S(tmpbuf, ZIP64_EXTLEN);
|
||||
}
|
||||
} else {
|
||||
readFully(tmpbuf, 0, EXTHDR);
|
||||
|
|
|
|||
|
|
@ -39,6 +39,7 @@ import static java.util.zip.ZipConstants.ENDHDR;
|
|||
import jdk.internal.access.JavaNioAccess;
|
||||
import jdk.internal.access.SharedSecrets;
|
||||
import jdk.internal.misc.Unsafe;
|
||||
import jdk.internal.util.Preconditions;
|
||||
|
||||
class ZipUtils {
|
||||
|
||||
|
|
@ -170,7 +171,10 @@ class ZipUtils {
|
|||
* The bytes are assumed to be in Intel (little-endian) byte order.
|
||||
*/
|
||||
public static final int get16(byte[] b, int off) {
|
||||
return (b[off] & 0xff) | ((b[off + 1] & 0xff) << 8);
|
||||
Preconditions.checkIndex(off, b.length, Preconditions.AIOOBE_FORMATTER);
|
||||
Preconditions.checkIndex(off + 1, b.length, Preconditions.AIOOBE_FORMATTER);
|
||||
return Short.toUnsignedInt(
|
||||
UNSAFE.getShortUnaligned(b, off + Unsafe.ARRAY_BYTE_BASE_OFFSET, false));
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
@ -178,15 +182,20 @@ class ZipUtils {
|
|||
* The bytes are assumed to be in Intel (little-endian) byte order.
|
||||
*/
|
||||
public static final long get32(byte[] b, int off) {
|
||||
return (get16(b, off) | ((long)get16(b, off+2) << 16)) & 0xffffffffL;
|
||||
Preconditions.checkIndex(off, b.length, Preconditions.AIOOBE_FORMATTER);
|
||||
Preconditions.checkIndex(off + 3, b.length, Preconditions.AIOOBE_FORMATTER);
|
||||
return Integer.toUnsignedLong(
|
||||
UNSAFE.getIntUnaligned(b, off + Unsafe.ARRAY_BYTE_BASE_OFFSET, false));
|
||||
}
|
||||
|
||||
/**
|
||||
* Fetches signed 64-bit value from byte array at specified offset.
|
||||
* The bytes are assumed to be in Intel (little-endian) byte order.
|
||||
*/
|
||||
public static final long get64(byte[] b, int off) {
|
||||
return get32(b, off) | (get32(b, off+4) << 32);
|
||||
public static final long get64S(byte[] b, int off) {
|
||||
Preconditions.checkIndex(off, b.length, Preconditions.AIOOBE_FORMATTER);
|
||||
Preconditions.checkIndex(off + 7, b.length, Preconditions.AIOOBE_FORMATTER);
|
||||
return UNSAFE.getLongUnaligned(b, off + Unsafe.ARRAY_BYTE_BASE_OFFSET, false);
|
||||
}
|
||||
|
||||
/**
|
||||
|
|
@ -195,28 +204,9 @@ class ZipUtils {
|
|||
*
|
||||
*/
|
||||
public static final int get32S(byte[] b, int off) {
|
||||
return (get16(b, off) | (get16(b, off+2) << 16));
|
||||
}
|
||||
|
||||
// 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);
|
||||
Preconditions.checkIndex(off, b.length, Preconditions.AIOOBE_FORMATTER);
|
||||
Preconditions.checkIndex(off + 3, b.length, Preconditions.AIOOBE_FORMATTER);
|
||||
return UNSAFE.getIntUnaligned(b, off + Unsafe.ARRAY_BYTE_BASE_OFFSET, false);
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -231,56 +221,56 @@ class ZipUtils {
|
|||
|
||||
|
||||
// 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
|
||||
static final long LOCSIG(byte[] b) { return get32(b, 0); } // signature
|
||||
static final int LOCVER(byte[] b) { return get16(b, 4); } // version needed to extract
|
||||
static final int LOCFLG(byte[] b) { return get16(b, 6); } // general purpose bit flags
|
||||
static final int LOCHOW(byte[] b) { return get16(b, 8); } // compression method
|
||||
static final long LOCTIM(byte[] b) { return get32(b, 10);} // modification time
|
||||
static final long LOCCRC(byte[] b) { return get32(b, 14);} // crc of uncompressed data
|
||||
static final long LOCSIZ(byte[] b) { return get32(b, 18);} // compressed data size
|
||||
static final long LOCLEN(byte[] b) { return get32(b, 22);} // uncompressed data size
|
||||
static final int LOCNAM(byte[] b) { return get16(b, 26);} // filename length
|
||||
static final int LOCEXT(byte[] b) { return get16(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
|
||||
static final long EXTCRC(byte[] b) { return get32(b, 4);} // crc of uncompressed data
|
||||
static final long EXTSIZ(byte[] b) { return get32(b, 8);} // compressed size
|
||||
static final long EXTLEN(byte[] b) { return get32(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);}
|
||||
static final int ENDSUB(byte[] b) { return get16(b, 8); } // number of entries on this disk
|
||||
static final int ENDTOT(byte[] b) { return get16(b, 10);} // total number of entries
|
||||
static final long ENDSIZ(byte[] b) { return get32(b, 12);} // central directory size
|
||||
static final long ENDOFF(byte[] b) { return get32(b, 16);} // central directory offset
|
||||
static final int ENDCOM(byte[] b) { return get16(b, 20);} // size of ZIP file comment
|
||||
static final int ENDCOM(byte[] b, int off) { return get16(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
|
||||
// zip64 end of central directory record fields
|
||||
static final long ZIP64_ENDTOD(byte[] b) { return get64S(b, 24);} // total number of entries on disk
|
||||
static final long ZIP64_ENDTOT(byte[] b) { return get64S(b, 32);} // total number of entries
|
||||
static final long ZIP64_ENDSIZ(byte[] b) { return get64S(b, 40);} // central directory size
|
||||
static final long ZIP64_ENDOFF(byte[] b) { return get64S(b, 48);} // central directory offset
|
||||
static final long ZIP64_LOCOFF(byte[] b) { return get64S(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 CENVEM_FA(byte[] b, int pos) { return CH(b, pos + 5); } // file attribute compatibility
|
||||
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 int CENATX_PERMS(byte[] b, int pos) { return SH(b, pos + 40);} // posix permission data
|
||||
static final long CENOFF(byte[] b, int pos) { return LG(b, pos + 42);}
|
||||
static final long CENSIG(byte[] b, int pos) { return get32(b, pos + 0); }
|
||||
static final int CENVEM(byte[] b, int pos) { return get16(b, pos + 4); }
|
||||
static final int CENVEM_FA(byte[] b, int pos) { return Byte.toUnsignedInt(b[pos + 5]); } // file attribute compatibility
|
||||
static final int CENVER(byte[] b, int pos) { return get16(b, pos + 6); }
|
||||
static final int CENFLG(byte[] b, int pos) { return get16(b, pos + 8); }
|
||||
static final int CENHOW(byte[] b, int pos) { return get16(b, pos + 10);}
|
||||
static final long CENTIM(byte[] b, int pos) { return get32(b, pos + 12);}
|
||||
static final long CENCRC(byte[] b, int pos) { return get32(b, pos + 16);}
|
||||
static final long CENSIZ(byte[] b, int pos) { return get32(b, pos + 20);}
|
||||
static final long CENLEN(byte[] b, int pos) { return get32(b, pos + 24);}
|
||||
static final int CENNAM(byte[] b, int pos) { return get16(b, pos + 28);}
|
||||
static final int CENEXT(byte[] b, int pos) { return get16(b, pos + 30);}
|
||||
static final int CENCOM(byte[] b, int pos) { return get16(b, pos + 32);}
|
||||
static final int CENDSK(byte[] b, int pos) { return get16(b, pos + 34);}
|
||||
static final int CENATT(byte[] b, int pos) { return get16(b, pos + 36);}
|
||||
static final long CENATX(byte[] b, int pos) { return get32(b, pos + 38);}
|
||||
static final int CENATX_PERMS(byte[] b, int pos) { return get16(b, pos + 40);} // posix permission data
|
||||
static final long CENOFF(byte[] b, int pos) { return get32(b, pos + 42);}
|
||||
|
||||
// The END header is followed by a variable length comment of size < 64k.
|
||||
static final long END_MAXLEN = 0xFFFF + ENDHDR;
|
||||
|
|
@ -293,16 +283,16 @@ class ZipUtils {
|
|||
jdk.internal.loader.BootLoader.loadLibrary("zip");
|
||||
}
|
||||
|
||||
private static final Unsafe unsafe = Unsafe.getUnsafe();
|
||||
private static final Unsafe UNSAFE = Unsafe.getUnsafe();
|
||||
|
||||
private static final long byteBufferArrayOffset = unsafe.objectFieldOffset(ByteBuffer.class, "hb");
|
||||
private static final long byteBufferOffsetOffset = unsafe.objectFieldOffset(ByteBuffer.class, "offset");
|
||||
private static final long byteBufferArrayOffset = UNSAFE.objectFieldOffset(ByteBuffer.class, "hb");
|
||||
private static final long byteBufferOffsetOffset = UNSAFE.objectFieldOffset(ByteBuffer.class, "offset");
|
||||
|
||||
static byte[] getBufferArray(ByteBuffer byteBuffer) {
|
||||
return (byte[]) unsafe.getReference(byteBuffer, byteBufferArrayOffset);
|
||||
return (byte[]) UNSAFE.getReference(byteBuffer, byteBufferArrayOffset);
|
||||
}
|
||||
|
||||
static int getBufferOffset(ByteBuffer byteBuffer) {
|
||||
return unsafe.getInt(byteBuffer, byteBufferOffsetOffset);
|
||||
return UNSAFE.getInt(byteBuffer, byteBufferOffsetOffset);
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue