Mercurial > hg > truffle
annotate test/compiler/8000805/Test8000805.java @ 12986:1b422ef5288a
8025728: Missing volatile specifier for field G1AllocRegion::_alloc_region
Summary: The field G1AllocRegion::_alloc_region needs to be declared volatile as it is used with that intention. Otherwise the compiler may generate the code that reloads the value which might have changed in the meantime, leading to spurious crashes.
Reviewed-by: iveresov, simonis, tschatzl
Contributed-by: Axel Siebenborn <axel.siebenborn@sap.com>
| author | tschatzl |
|---|---|
| date | Wed, 23 Oct 2013 10:23:06 +0200 |
| parents | 7369298bec7e |
| children | de6a9e811145 |
| rev | line source |
|---|---|
| 6891 | 1 /* |
| 2 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 20 * or visit www.oracle.com if you need additional information or have any | |
| 21 * questions. | |
| 22 */ | |
| 23 | |
| 24 /** | |
| 25 * @test | |
| 26 * @bug 8000805 | |
| 27 * @summary JMM issue: short loads are non-atomic | |
| 28 * | |
|
8684
7369298bec7e
7115383: TEST_BUG: some jtreg tests fail because they explicitly specify -server option
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29 * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:-TieredCompilation -Xcomp -XX:+PrintCompilation -XX:CompileOnly=Test8000805.loadS2LmaskFF,Test8000805.loadS2Lmask16,Test8000805.loadS2Lmask13,Test8000805.loadUS_signExt,Test8000805.loadB2L_mask8 Test8000805 |
| 6891 | 30 */ |
| 31 | |
| 32 public class Test8000805 { | |
| 33 static long loadS2LmaskFF (short[] sa) { return sa[0] & 0xFF; } | |
| 34 static long loadS2LmaskFF_1 (short[] sa) { return sa[0] & 0xFF; } | |
| 35 | |
| 36 static long loadS2Lmask16 (short[] sa) { return sa[0] & 0xFFFE; } | |
| 37 static long loadS2Lmask16_1 (short[] sa) { return sa[0] & 0xFFFE; } | |
| 38 | |
| 39 static long loadS2Lmask13 (short[] sa) { return sa[0] & 0x0FFF; } | |
| 40 static long loadS2Lmask13_1 (short[] sa) { return sa[0] & 0x0FFF; } | |
| 41 | |
| 42 static int loadUS_signExt (char[] ca) { return (ca[0] << 16) >> 16; } | |
| 43 static int loadUS_signExt_1 (char[] ca) { return (ca[0] << 16) >> 16; } | |
| 44 | |
| 45 static long loadB2L_mask8 (byte[] ba) { return ba[0] & 0x55; } | |
| 46 static long loadB2L_mask8_1 (byte[] ba) { return ba[0] & 0x55; } | |
| 47 | |
| 48 public static void main(String[] args) { | |
| 49 for (int i = Byte.MIN_VALUE; i < Byte.MAX_VALUE; i++) { | |
| 50 byte[] ba = new byte[] { (byte) i}; | |
| 51 | |
| 52 { long v1 = loadB2L_mask8(ba); | |
| 53 long v2 = loadB2L_mask8_1(ba); | |
| 54 if (v1 != v2) | |
| 55 throw new InternalError(String.format("loadB2L_mask8 failed: %x != %x", v1, v2)); } | |
| 56 } | |
| 57 | |
| 58 for (int i = Short.MIN_VALUE; i < Short.MAX_VALUE; i++) { | |
| 59 short[] sa = new short[] { (short)i }; | |
| 60 char[] ca = new char[] { (char)i }; | |
| 61 | |
| 62 { long v1 = loadS2LmaskFF(sa); | |
| 63 long v2 = loadS2LmaskFF_1(sa); | |
| 64 if (v1 != v2) | |
| 65 throw new InternalError(String.format("loadS2LmaskFF failed: %x != %x", v1, v2)); } | |
| 66 | |
| 67 { long v1 = loadS2Lmask16(sa); | |
| 68 long v2 = loadS2Lmask16_1(sa); | |
| 69 if (v1 != v2) | |
| 70 throw new InternalError(String.format("loadS2Lmask16 failed: %x != %x", v1, v2)); } | |
| 71 | |
| 72 { long v1 = loadS2Lmask13(sa); | |
| 73 long v2 = loadS2Lmask13_1(sa); | |
| 74 if (v1 != v2) | |
| 75 throw new InternalError(String.format("loadS2Lmask13 failed: %x != %x", v1, v2)); } | |
| 76 | |
| 77 { int v1 = loadUS_signExt(ca); | |
| 78 int v2 = loadUS_signExt_1(ca); | |
| 79 if (v1 != v2) | |
| 80 throw new InternalError(String.format("loadUS_signExt failed: %x != %x", v1, v2)); } | |
| 81 } | |
| 82 | |
| 83 System.out.println("TEST PASSED."); | |
| 84 } | |
| 85 } |