| /* |
| * Copyright (c) 2016, 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 |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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 |
| * @summary tests on constant folding of unsafe get operations from stable arrays |
| * @library /test/lib |
| * |
| * @requires vm.flavor == "server" |
| * |
| * @modules java.base/jdk.internal.vm.annotation |
| * java.base/jdk.internal.misc |
| |
| * @run main/bootclasspath/othervm -XX:+UnlockDiagnosticVMOptions |
| * -Xbatch -XX:-TieredCompilation |
| * -XX:+FoldStableValues |
| * -XX:CompileCommand=dontinline,*Test::test* |
| * compiler.unsafe.UnsafeGetStableArrayElement |
| */ |
| |
| package compiler.unsafe; |
| |
| import jdk.internal.misc.Unsafe; |
| import jdk.internal.vm.annotation.Stable; |
| import jdk.test.lib.Platform; |
| |
| import java.util.concurrent.Callable; |
| |
| import static jdk.internal.misc.Unsafe.*; |
| import static jdk.test.lib.Asserts.assertEQ; |
| import static jdk.test.lib.Asserts.assertNE; |
| |
| public class UnsafeGetStableArrayElement { |
| @Stable static final boolean[] STABLE_BOOLEAN_ARRAY = new boolean[16]; |
| @Stable static final byte[] STABLE_BYTE_ARRAY = new byte[16]; |
| @Stable static final short[] STABLE_SHORT_ARRAY = new short[8]; |
| @Stable static final char[] STABLE_CHAR_ARRAY = new char[8]; |
| @Stable static final int[] STABLE_INT_ARRAY = new int[4]; |
| @Stable static final long[] STABLE_LONG_ARRAY = new long[2]; |
| @Stable static final float[] STABLE_FLOAT_ARRAY = new float[4]; |
| @Stable static final double[] STABLE_DOUBLE_ARRAY = new double[2]; |
| @Stable static final Object[] STABLE_OBJECT_ARRAY = new Object[4]; |
| |
| static { |
| Setter.reset(); |
| } |
| static final Unsafe U = Unsafe.getUnsafe(); |
| |
| static class Setter { |
| private static void setZ(boolean defaultVal) { STABLE_BOOLEAN_ARRAY[0] = defaultVal ? false : true; } |
| private static void setB(boolean defaultVal) { STABLE_BYTE_ARRAY[0] = defaultVal ? 0 : Byte.MAX_VALUE; } |
| private static void setS(boolean defaultVal) { STABLE_SHORT_ARRAY[0] = defaultVal ? 0 : Short.MAX_VALUE; } |
| private static void setC(boolean defaultVal) { STABLE_CHAR_ARRAY[0] = defaultVal ? 0 : Character.MAX_VALUE; } |
| private static void setI(boolean defaultVal) { STABLE_INT_ARRAY[0] = defaultVal ? 0 : Integer.MAX_VALUE; } |
| private static void setJ(boolean defaultVal) { STABLE_LONG_ARRAY[0] = defaultVal ? 0 : Long.MAX_VALUE; } |
| private static void setF(boolean defaultVal) { STABLE_FLOAT_ARRAY[0] = defaultVal ? 0 : Float.MAX_VALUE; } |
| private static void setD(boolean defaultVal) { STABLE_DOUBLE_ARRAY[0] = defaultVal ? 0 : Double.MAX_VALUE; } |
| private static void setL(boolean defaultVal) { STABLE_OBJECT_ARRAY[0] = defaultVal ? null : new Object(); } |
| |
| static void reset() { |
| setZ(false); |
| setB(false); |
| setS(false); |
| setC(false); |
| setI(false); |
| setJ(false); |
| setF(false); |
| setD(false); |
| setL(false); |
| } |
| } |
| |
| static class Test { |
| static void changeZ() { Setter.setZ(true); } |
| static void changeB() { Setter.setB(true); } |
| static void changeS() { Setter.setS(true); } |
| static void changeC() { Setter.setC(true); } |
| static void changeI() { Setter.setI(true); } |
| static void changeJ() { Setter.setJ(true); } |
| static void changeF() { Setter.setF(true); } |
| static void changeD() { Setter.setD(true); } |
| static void changeL() { Setter.setL(true); } |
| |
| static boolean testZ_Z() { return U.getBoolean(STABLE_BOOLEAN_ARRAY, ARRAY_BOOLEAN_BASE_OFFSET); } |
| static byte testZ_B() { return U.getByte( STABLE_BOOLEAN_ARRAY, ARRAY_BOOLEAN_BASE_OFFSET); } |
| static short testZ_S() { return U.getShort( STABLE_BOOLEAN_ARRAY, ARRAY_BOOLEAN_BASE_OFFSET); } |
| static char testZ_C() { return U.getChar( STABLE_BOOLEAN_ARRAY, ARRAY_BOOLEAN_BASE_OFFSET); } |
| static int testZ_I() { return U.getInt( STABLE_BOOLEAN_ARRAY, ARRAY_BOOLEAN_BASE_OFFSET); } |
| static long testZ_J() { return U.getLong( STABLE_BOOLEAN_ARRAY, ARRAY_BOOLEAN_BASE_OFFSET); } |
| static float testZ_F() { return U.getFloat( STABLE_BOOLEAN_ARRAY, ARRAY_BOOLEAN_BASE_OFFSET); } |
| static double testZ_D() { return U.getDouble( STABLE_BOOLEAN_ARRAY, ARRAY_BOOLEAN_BASE_OFFSET); } |
| |
| static boolean testB_Z() { return U.getBoolean(STABLE_BYTE_ARRAY, ARRAY_BYTE_BASE_OFFSET); } |
| static byte testB_B() { return U.getByte( STABLE_BYTE_ARRAY, ARRAY_BYTE_BASE_OFFSET); } |
| static short testB_S() { return U.getShort( STABLE_BYTE_ARRAY, ARRAY_BYTE_BASE_OFFSET); } |
| static char testB_C() { return U.getChar( STABLE_BYTE_ARRAY, ARRAY_BYTE_BASE_OFFSET); } |
| static int testB_I() { return U.getInt( STABLE_BYTE_ARRAY, ARRAY_BYTE_BASE_OFFSET); } |
| static long testB_J() { return U.getLong( STABLE_BYTE_ARRAY, ARRAY_BYTE_BASE_OFFSET); } |
| static float testB_F() { return U.getFloat( STABLE_BYTE_ARRAY, ARRAY_BYTE_BASE_OFFSET); } |
| static double testB_D() { return U.getDouble( STABLE_BYTE_ARRAY, ARRAY_BYTE_BASE_OFFSET); } |
| |
| static boolean testS_Z() { return U.getBoolean(STABLE_SHORT_ARRAY, ARRAY_SHORT_BASE_OFFSET); } |
| static byte testS_B() { return U.getByte( STABLE_SHORT_ARRAY, ARRAY_SHORT_BASE_OFFSET); } |
| static short testS_S() { return U.getShort( STABLE_SHORT_ARRAY, ARRAY_SHORT_BASE_OFFSET); } |
| static char testS_C() { return U.getChar( STABLE_SHORT_ARRAY, ARRAY_SHORT_BASE_OFFSET); } |
| static int testS_I() { return U.getInt( STABLE_SHORT_ARRAY, ARRAY_SHORT_BASE_OFFSET); } |
| static long testS_J() { return U.getLong( STABLE_SHORT_ARRAY, ARRAY_SHORT_BASE_OFFSET); } |
| static float testS_F() { return U.getFloat( STABLE_SHORT_ARRAY, ARRAY_SHORT_BASE_OFFSET); } |
| static double testS_D() { return U.getDouble( STABLE_SHORT_ARRAY, ARRAY_SHORT_BASE_OFFSET); } |
| |
| static boolean testC_Z() { return U.getBoolean(STABLE_CHAR_ARRAY, ARRAY_CHAR_BASE_OFFSET); } |
| static byte testC_B() { return U.getByte( STABLE_CHAR_ARRAY, ARRAY_CHAR_BASE_OFFSET); } |
| static short testC_S() { return U.getShort( STABLE_CHAR_ARRAY, ARRAY_CHAR_BASE_OFFSET); } |
| static char testC_C() { return U.getChar( STABLE_CHAR_ARRAY, ARRAY_CHAR_BASE_OFFSET); } |
| static int testC_I() { return U.getInt( STABLE_CHAR_ARRAY, ARRAY_CHAR_BASE_OFFSET); } |
| static long testC_J() { return U.getLong( STABLE_CHAR_ARRAY, ARRAY_CHAR_BASE_OFFSET); } |
| static float testC_F() { return U.getFloat( STABLE_CHAR_ARRAY, ARRAY_CHAR_BASE_OFFSET); } |
| static double testC_D() { return U.getDouble( STABLE_CHAR_ARRAY, ARRAY_CHAR_BASE_OFFSET); } |
| |
| static boolean testI_Z() { return U.getBoolean(STABLE_INT_ARRAY, ARRAY_INT_BASE_OFFSET); } |
| static byte testI_B() { return U.getByte( STABLE_INT_ARRAY, ARRAY_INT_BASE_OFFSET); } |
| static short testI_S() { return U.getShort( STABLE_INT_ARRAY, ARRAY_INT_BASE_OFFSET); } |
| static char testI_C() { return U.getChar( STABLE_INT_ARRAY, ARRAY_INT_BASE_OFFSET); } |
| static int testI_I() { return U.getInt( STABLE_INT_ARRAY, ARRAY_INT_BASE_OFFSET); } |
| static long testI_J() { return U.getLong( STABLE_INT_ARRAY, ARRAY_INT_BASE_OFFSET); } |
| static float testI_F() { return U.getFloat( STABLE_INT_ARRAY, ARRAY_INT_BASE_OFFSET); } |
| static double testI_D() { return U.getDouble( STABLE_INT_ARRAY, ARRAY_INT_BASE_OFFSET); } |
| |
| static boolean testJ_Z() { return U.getBoolean(STABLE_LONG_ARRAY, ARRAY_LONG_BASE_OFFSET); } |
| static byte testJ_B() { return U.getByte( STABLE_LONG_ARRAY, ARRAY_LONG_BASE_OFFSET); } |
| static short testJ_S() { return U.getShort( STABLE_LONG_ARRAY, ARRAY_LONG_BASE_OFFSET); } |
| static char testJ_C() { return U.getChar( STABLE_LONG_ARRAY, ARRAY_LONG_BASE_OFFSET); } |
| static int testJ_I() { return U.getInt( STABLE_LONG_ARRAY, ARRAY_LONG_BASE_OFFSET); } |
| static long testJ_J() { return U.getLong( STABLE_LONG_ARRAY, ARRAY_LONG_BASE_OFFSET); } |
| static float testJ_F() { return U.getFloat( STABLE_LONG_ARRAY, ARRAY_LONG_BASE_OFFSET); } |
| static double testJ_D() { return U.getDouble( STABLE_LONG_ARRAY, ARRAY_LONG_BASE_OFFSET); } |
| |
| static boolean testF_Z() { return U.getBoolean(STABLE_FLOAT_ARRAY, ARRAY_FLOAT_BASE_OFFSET); } |
| static byte testF_B() { return U.getByte( STABLE_FLOAT_ARRAY, ARRAY_FLOAT_BASE_OFFSET); } |
| static short testF_S() { return U.getShort( STABLE_FLOAT_ARRAY, ARRAY_FLOAT_BASE_OFFSET); } |
| static char testF_C() { return U.getChar( STABLE_FLOAT_ARRAY, ARRAY_FLOAT_BASE_OFFSET); } |
| static int testF_I() { return U.getInt( STABLE_FLOAT_ARRAY, ARRAY_FLOAT_BASE_OFFSET); } |
| static long testF_J() { return U.getLong( STABLE_FLOAT_ARRAY, ARRAY_FLOAT_BASE_OFFSET); } |
| static float testF_F() { return U.getFloat( STABLE_FLOAT_ARRAY, ARRAY_FLOAT_BASE_OFFSET); } |
| static double testF_D() { return U.getDouble( STABLE_FLOAT_ARRAY, ARRAY_FLOAT_BASE_OFFSET); } |
| |
| static boolean testD_Z() { return U.getBoolean(STABLE_DOUBLE_ARRAY, ARRAY_DOUBLE_BASE_OFFSET); } |
| static byte testD_B() { return U.getByte( STABLE_DOUBLE_ARRAY, ARRAY_DOUBLE_BASE_OFFSET); } |
| static short testD_S() { return U.getShort( STABLE_DOUBLE_ARRAY, ARRAY_DOUBLE_BASE_OFFSET); } |
| static char testD_C() { return U.getChar( STABLE_DOUBLE_ARRAY, ARRAY_DOUBLE_BASE_OFFSET); } |
| static int testD_I() { return U.getInt( STABLE_DOUBLE_ARRAY, ARRAY_DOUBLE_BASE_OFFSET); } |
| static long testD_J() { return U.getLong( STABLE_DOUBLE_ARRAY, ARRAY_DOUBLE_BASE_OFFSET); } |
| static float testD_F() { return U.getFloat( STABLE_DOUBLE_ARRAY, ARRAY_DOUBLE_BASE_OFFSET); } |
| static double testD_D() { return U.getDouble( STABLE_DOUBLE_ARRAY, ARRAY_DOUBLE_BASE_OFFSET); } |
| |
| static Object testL_L() { return U.getObject( STABLE_OBJECT_ARRAY, ARRAY_OBJECT_BASE_OFFSET); } |
| static boolean testL_Z() { return U.getBoolean(STABLE_OBJECT_ARRAY, ARRAY_OBJECT_BASE_OFFSET); } |
| static byte testL_B() { return U.getByte( STABLE_OBJECT_ARRAY, ARRAY_OBJECT_BASE_OFFSET); } |
| static short testL_S() { return U.getShort( STABLE_OBJECT_ARRAY, ARRAY_OBJECT_BASE_OFFSET); } |
| static char testL_C() { return U.getChar( STABLE_OBJECT_ARRAY, ARRAY_OBJECT_BASE_OFFSET); } |
| static int testL_I() { return U.getInt( STABLE_OBJECT_ARRAY, ARRAY_OBJECT_BASE_OFFSET); } |
| static long testL_J() { return U.getLong( STABLE_OBJECT_ARRAY, ARRAY_OBJECT_BASE_OFFSET); } |
| static float testL_F() { return U.getFloat( STABLE_OBJECT_ARRAY, ARRAY_OBJECT_BASE_OFFSET); } |
| static double testL_D() { return U.getDouble( STABLE_OBJECT_ARRAY, ARRAY_OBJECT_BASE_OFFSET); } |
| |
| static short testS_U() { return U.getShortUnaligned(STABLE_SHORT_ARRAY, ARRAY_SHORT_BASE_OFFSET + 1); } |
| static char testC_U() { return U.getCharUnaligned( STABLE_CHAR_ARRAY, ARRAY_CHAR_BASE_OFFSET + 1); } |
| static int testI_U() { return U.getIntUnaligned( STABLE_INT_ARRAY, ARRAY_INT_BASE_OFFSET + 1); } |
| static long testJ_U() { return U.getLongUnaligned( STABLE_LONG_ARRAY, ARRAY_LONG_BASE_OFFSET + 1); } |
| } |
| |
| static void run(Callable<?> c) throws Exception { |
| run(c, null, null); |
| } |
| |
| static void run(Callable<?> c, Runnable sameResultAction, Runnable changeResultAction) throws Exception { |
| Object first = c.call(); |
| |
| // Trigger compilation. |
| for (int i = 0; i < 20_000; i++) { |
| // Don't compare results here, since most of Test::testL_* results vary across iterations (due to GC). |
| c.call(); |
| } |
| |
| if (sameResultAction != null) { |
| sameResultAction.run(); |
| assertEQ(first, c.call()); |
| } |
| |
| if (changeResultAction != null) { |
| changeResultAction.run(); |
| assertNE(first, c.call()); |
| assertEQ(c.call(), c.call()); |
| } |
| } |
| |
| static void testMatched(Callable<?> c, Runnable setDefaultAction) throws Exception { |
| run(c, setDefaultAction, null); |
| Setter.reset(); |
| } |
| |
| static void testMismatched(Callable<?> c, Runnable setDefaultAction) throws Exception { |
| run(c, null, setDefaultAction); |
| Setter.reset(); |
| } |
| |
| static void testUnsafeAccess() throws Exception { |
| // boolean[], aligned accesses |
| testMatched( Test::testZ_Z, Test::changeZ); |
| testMismatched(Test::testZ_B, Test::changeZ); |
| testMismatched(Test::testZ_S, Test::changeZ); |
| testMismatched(Test::testZ_C, Test::changeZ); |
| testMismatched(Test::testZ_I, Test::changeZ); |
| testMismatched(Test::testZ_J, Test::changeZ); |
| testMismatched(Test::testZ_F, Test::changeZ); |
| testMismatched(Test::testZ_D, Test::changeZ); |
| |
| // byte[], aligned accesses |
| testMismatched(Test::testB_Z, Test::changeB); |
| testMatched( Test::testB_B, Test::changeB); |
| testMismatched(Test::testB_S, Test::changeB); |
| testMismatched(Test::testB_C, Test::changeB); |
| testMismatched(Test::testB_I, Test::changeB); |
| testMismatched(Test::testB_J, Test::changeB); |
| testMismatched(Test::testB_F, Test::changeB); |
| testMismatched(Test::testB_D, Test::changeB); |
| |
| // short[], aligned accesses |
| testMismatched(Test::testS_Z, Test::changeS); |
| testMismatched(Test::testS_B, Test::changeS); |
| testMatched( Test::testS_S, Test::changeS); |
| testMismatched(Test::testS_C, Test::changeS); |
| testMismatched(Test::testS_I, Test::changeS); |
| testMismatched(Test::testS_J, Test::changeS); |
| testMismatched(Test::testS_F, Test::changeS); |
| testMismatched(Test::testS_D, Test::changeS); |
| |
| // char[], aligned accesses |
| testMismatched(Test::testC_Z, Test::changeC); |
| testMismatched(Test::testC_B, Test::changeC); |
| testMismatched(Test::testC_S, Test::changeC); |
| testMatched( Test::testC_C, Test::changeC); |
| testMismatched(Test::testC_I, Test::changeC); |
| testMismatched(Test::testC_J, Test::changeC); |
| testMismatched(Test::testC_F, Test::changeC); |
| testMismatched(Test::testC_D, Test::changeC); |
| |
| // int[], aligned accesses |
| testMismatched(Test::testI_Z, Test::changeI); |
| testMismatched(Test::testI_B, Test::changeI); |
| testMismatched(Test::testI_S, Test::changeI); |
| testMismatched(Test::testI_C, Test::changeI); |
| testMatched( Test::testI_I, Test::changeI); |
| testMismatched(Test::testI_J, Test::changeI); |
| testMismatched(Test::testI_F, Test::changeI); |
| testMismatched(Test::testI_D, Test::changeI); |
| |
| // long[], aligned accesses |
| testMismatched(Test::testJ_Z, Test::changeJ); |
| testMismatched(Test::testJ_B, Test::changeJ); |
| testMismatched(Test::testJ_S, Test::changeJ); |
| testMismatched(Test::testJ_C, Test::changeJ); |
| testMismatched(Test::testJ_I, Test::changeJ); |
| testMatched( Test::testJ_J, Test::changeJ); |
| testMismatched(Test::testJ_F, Test::changeJ); |
| testMismatched(Test::testJ_D, Test::changeJ); |
| |
| // float[], aligned accesses |
| testMismatched(Test::testF_Z, Test::changeF); |
| testMismatched(Test::testF_B, Test::changeF); |
| testMismatched(Test::testF_S, Test::changeF); |
| testMismatched(Test::testF_C, Test::changeF); |
| testMismatched(Test::testF_I, Test::changeF); |
| testMismatched(Test::testF_J, Test::changeF); |
| testMatched( Test::testF_F, Test::changeF); |
| testMismatched(Test::testF_D, Test::changeF); |
| |
| // double[], aligned accesses |
| testMismatched(Test::testD_Z, Test::changeD); |
| testMismatched(Test::testD_B, Test::changeD); |
| testMismatched(Test::testD_S, Test::changeD); |
| testMismatched(Test::testD_C, Test::changeD); |
| testMismatched(Test::testD_I, Test::changeD); |
| testMismatched(Test::testD_J, Test::changeD); |
| testMismatched(Test::testD_F, Test::changeD); |
| testMatched( Test::testD_D, Test::changeD); |
| |
| // Object[], aligned accesses |
| testMismatched(Test::testL_J, Test::changeL); // long & double are always as large as an OOP |
| testMismatched(Test::testL_D, Test::changeL); |
| testMatched( Test::testL_L, Test::changeL); |
| |
| // Unaligned accesses |
| testMismatched(Test::testS_U, Test::changeS); |
| testMismatched(Test::testC_U, Test::changeC); |
| testMismatched(Test::testI_U, Test::changeI); |
| testMismatched(Test::testJ_U, Test::changeJ); |
| |
| // No way to reliably check the expected behavior: |
| // (1) OOPs change during GC; |
| // (2) there's no way to reliably change some part of an OOP (e.g., when reading a byte from it). |
| // |
| // Just trigger the compilation hoping to catch any problems with asserts. |
| run(Test::testL_B); |
| run(Test::testL_Z); |
| run(Test::testL_S); |
| run(Test::testL_C); |
| run(Test::testL_I); |
| run(Test::testL_F); |
| } |
| |
| public static void main(String[] args) throws Exception { |
| if (!Platform.isServer()) { |
| throw new Error("TESTBUG: Not server VM"); |
| } |
| testUnsafeAccess(); |
| System.out.println("TEST PASSED"); |
| } |
| } |
