jdk8-mips64-public/hotspot: test/compiler/c2/Test8202414.java@025ce746a942 (annotated)

test/compiler/c2/Test8202414.java@025ce746a942 (annotated)

test/compiler/c2/Test8202414.java

Wed, 01 May 2019 22:02:48 +0530

author: rraghavan
date: Wed, 01 May 2019 22:02:48 +0530
changeset 9686: 025ce746a942
permissions: -rw-r--r--

8202414: Unsafe write after primitive array creation may result in array length change
Summary: Avoided collecting unaligned stores in Initialize node by making can_capture_store return false for same
Reviewed-by: dlong, kvn, vlivanov

 /*
  * Copyright (c) 2019, 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 8202414
  * @summary Unsafe write after primitive array creation may result in array length change
  * @requires (os.arch != "sparc") & (os.arch != "sparcv9")
  * @run main/othervm compiler.c2.Test8202414
  */
 package compiler.c2;
 import sun.misc.Unsafe;
 import java.lang.reflect.Field;
 import java.security.AccessController;
 import java.security.PrivilegedAction;
 public class Test8202414 {
     public static void main(String[] args) {
         System.err.close();
         int count = 0;
         while (count++ < 120000) {
           test();
         }
     }
     public static void test() {
         byte[] newBufb = serByte(397);
         short[] newBufs = serShort(397);
         int[] newBufi = serInt(397);
         long[] newBufl = serLong(397);
         if (newBufb.length != 397 || newBufs.length != 397
             || newBufi.length != 397 || newBufl.length != 397) {
             System.out.println("array length internal error");
             throw new RuntimeException("Test failed");
         }
     }
     public static byte[] serByte(int bufLen) {
         byte[] buf = new byte[bufLen];
         THE_UNSAFE.putByte(buf, BYTE_ARRAY_BASE_OFFSET + 1, (byte) buf.length);
         System.err.println("ref " + buf);
         return buf;
     }
     public static short[] serShort(int bufLen) {
         short[] buf = new short[bufLen];
         THE_UNSAFE.putShort(buf, SHORT_ARRAY_BASE_OFFSET + 1, (short) buf.length);
         System.err.println("ref " + buf);
         return buf;
     }
     public static int[] serInt(int bufLen) {
         int[] buf = new int[bufLen];
         THE_UNSAFE.putInt(buf, INT_ARRAY_BASE_OFFSET + 1, buf.length);
         System.err.println("ref " + buf);
         return buf;
     }
     public static long[] serLong(int bufLen) {
         long[] buf = new long[bufLen];
         THE_UNSAFE.putLong(buf, LONG_ARRAY_BASE_OFFSET + 1, buf.length);
         System.err.println("ref " + buf);
         return buf;
     }
     /* Unsafe fields and initialization
      */
     static final Unsafe THE_UNSAFE;
     static final long BYTE_ARRAY_BASE_OFFSET;
     static final long SHORT_ARRAY_BASE_OFFSET;
     static final long INT_ARRAY_BASE_OFFSET;
     static final long LONG_ARRAY_BASE_OFFSET;
     static {
         THE_UNSAFE = (Unsafe) AccessController.doPrivileged (
             new PrivilegedAction<Object>() {
                 @Override
                 public Object run() {
                     try {
                         Field f = Unsafe.class.getDeclaredField("theUnsafe");
                         f.setAccessible(true);
                         return f.get(null);
                     } catch (NoSuchFieldException | IllegalAccessException e) {
                         throw new Error();
                     }
                 }
             }
         );
         BYTE_ARRAY_BASE_OFFSET = THE_UNSAFE.arrayBaseOffset(byte[].class);
         SHORT_ARRAY_BASE_OFFSET = THE_UNSAFE.arrayBaseOffset(short[].class);
         INT_ARRAY_BASE_OFFSET = THE_UNSAFE.arrayBaseOffset(int[].class);
         LONG_ARRAY_BASE_OFFSET = THE_UNSAFE.arrayBaseOffset(long[].class);
     }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

test/compiler/c2/Test8202414.java@025ce746a942 (annotated)

test/compiler/c2/Test8202414.java