05459df0c7
Use the compilation-local seed in 'StressLCM' and 'StressGCM' rather than the global one. As a consequence, these options use by default a fresh seed in every compilation, unless 'StressSeed=N' is specified, in which case they behave deterministically. Annotate tests that use 'StressLCM' and 'StressGCM' with the 'stress' and 'randomness' keys to reflect this change in default behavior. Reviewed-by: kvn, thartmann
88 lines
3.0 KiB
Java
88 lines
3.0 KiB
Java
/*
|
|
* Copyright (c) 2017, Red Hat, Inc. 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
|
|
* @key stress randomness
|
|
* @bug 8181742
|
|
* @summary Loads that bypass arraycopy ends up with wrong memory state
|
|
*
|
|
* @run main/othervm -XX:-BackgroundCompilation -XX:-UseOnStackReplacement -XX:+UnlockDiagnosticVMOptions -XX:+IgnoreUnrecognizedVMOptions -XX:+StressGCM -XX:+StressLCM TestLoadBypassACWithWrongMem
|
|
*
|
|
*/
|
|
|
|
import java.util.Arrays;
|
|
|
|
public class TestLoadBypassACWithWrongMem {
|
|
|
|
static int test1(int[] src) {
|
|
int[] dst = new int[10];
|
|
System.arraycopy(src, 0, dst, 0, 10);
|
|
src[1] = 0x42;
|
|
// dst[1] is transformed to src[1], src[1] must use the
|
|
// correct memory state (not the store above).
|
|
return dst[1];
|
|
}
|
|
|
|
static int test2(int[] src) {
|
|
int[] dst = (int[])src.clone();
|
|
src[1] = 0x42;
|
|
// Same as above for clone
|
|
return dst[1];
|
|
}
|
|
|
|
static Object test5_src = null;
|
|
static int test3() {
|
|
int[] dst = new int[10];
|
|
System.arraycopy(test5_src, 0, dst, 0, 10);
|
|
((int[])test5_src)[1] = 0x42;
|
|
System.arraycopy(test5_src, 0, dst, 0, 10);
|
|
// dst[1] is transformed to test5_src[1]. test5_src is Object
|
|
// but test5_src[1] must be on the slice for int[] not
|
|
// Object+some offset.
|
|
return dst[1];
|
|
}
|
|
|
|
static public void main(String[] args) {
|
|
int[] src = new int[10];
|
|
for (int i = 0; i < 20000; i++) {
|
|
Arrays.fill(src, 0);
|
|
int res = test1(src);
|
|
if (res != 0) {
|
|
throw new RuntimeException("bad result: " + res + " != " + 0);
|
|
}
|
|
Arrays.fill(src, 0);
|
|
res = test2(src);
|
|
if (res != 0) {
|
|
throw new RuntimeException("bad result: " + res + " != " + 0);
|
|
}
|
|
Arrays.fill(src, 0);
|
|
test5_src = src;
|
|
res = test3();
|
|
if (res != 0x42) {
|
|
throw new RuntimeException("bad result: " + res + " != " + 0x42);
|
|
}
|
|
}
|
|
}
|
|
}
|