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/*
* Copyright (c) 2016, 2018, 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.
*
* 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" & !vm.emulatedClient
*
* @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() || Platform.isEmulatedClient()) {
throw new Error("TESTBUG: Not server mode");
}
testUnsafeAccess();
System.out.println("TEST PASSED");
}
}
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