1berry/openjdk
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

8283122: [AIX, s390] UnsafeCopyMemory 'Mismatched' Tests Fail on Big Endian Systems

Browse Source 
Reviewed-by: thartmann, stuefe
This commit is contained in:
Tyler Steele 2022-03-15 14:52:27 +00:00 committed by Thomas Stuefe
parent 2cddf3f539
commit 4de72014d3
1 changed files with 11 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
test/hotspot/jtreg/compiler/unsafe/UnsafeCopyMemory.java
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2021, 2022 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
@ -36,11 +36,14 @@
package compiler.unsafe;
import jdk.internal.misc.Unsafe;
import java.nio.ByteOrder;
import static jdk.test.lib.Asserts.assertEQ;
public class UnsafeCopyMemory {
static private Unsafe UNSAFE = Unsafe.getUnsafe();
static final boolean IS_BIG_ENDIAN = ByteOrder.nativeOrder() == ByteOrder.BIG_ENDIAN;
// On-heap arrays
static int[] srcArr = new int[1];
static int[] dstArr = new int[1];
@ -104,8 +107,12 @@ public class UnsafeCopyMemory {
srcArr [readIdx] = v1;
dstArrL[writeIdx] = v2;
// On LE systems, low-order bytes of long and int overlap, but
// on BE systems, they differ by the size of an int.
long mismatchedOffset = Unsafe.ARRAY_LONG_BASE_OFFSET + (IS_BIG_ENDIAN ? 4 : 0);
UNSAFE.copyMemory(srcArr, Unsafe.ARRAY_INT_BASE_OFFSET,
dstArrL, Unsafe.ARRAY_LONG_BASE_OFFSET, 4); // mismatched
dstArrL, mismatchedOffset, 4); // mismatched
long r = resArrL[0]; // snapshot
srcArr[readIdx] = v3;
@ -156,6 +163,7 @@ public class UnsafeCopyMemory {
Object srcArrLocal = (flag ? srcArrIntLocal : srcArrLongLocal);
long srcOffset = (flag ? Unsafe.ARRAY_INT_BASE_OFFSET : Unsafe.ARRAY_LONG_BASE_OFFSET);
srcOffset += (!flag && IS_BIG_ENDIAN ? 4 : 0);
srcArrIntLocal[0] = v1;
srcArrLongLocal[0] = v1;
@ -179,6 +187,7 @@ public class UnsafeCopyMemory {
Object dstArrLocal = (flag ? dstArrIntLocal : dstArrLongLocal);
long dstOffset = (flag ? Unsafe.ARRAY_INT_BASE_OFFSET : Unsafe.ARRAY_LONG_BASE_OFFSET);
dstOffset += (!flag && IS_BIG_ENDIAN ? 4 : 0);
srcArr[readIdx] = v1;
dstArrIntLocal[0] = v2;