Mercurial > hg > graal-jvmci-8

comparison jvmci/jdk.vm.ci.hotspot/src/jdk/vm/ci/hotspot/HotSpotConstantReflectionProvider.java @ 23306:7b09dede4552

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
JVMCI options should not use System.getProperty() directly (JDK-8146820)
author Doug Simon <doug.simon@oracle.com>
date Mon, 08 Feb 2016 10:05:21 +0100
parents 87394b31a42e
children f895a46e0a45
comparison
equal deleted inserted replaced
23305:b057a49aa52a 23306:7b09dede4552
26 import static jdk.vm.ci.hotspot.HotSpotJVMCIRuntimeProvider.getArrayIndexScale; 26 import static jdk.vm.ci.hotspot.HotSpotJVMCIRuntimeProvider.getArrayIndexScale;
27 27
28 import java.lang.reflect.Array; 28 import java.lang.reflect.Array;
29 29
30 import jdk.vm.ci.common.JVMCIError; 30 import jdk.vm.ci.common.JVMCIError;
31 import jdk.vm.ci.hotspot.HotSpotJVMCIRuntime.Option;
31 import jdk.vm.ci.meta.Constant; 32 import jdk.vm.ci.meta.Constant;
32 import jdk.vm.ci.meta.ConstantReflectionProvider; 33 import jdk.vm.ci.meta.ConstantReflectionProvider;
33 import jdk.vm.ci.meta.JavaConstant; 34 import jdk.vm.ci.meta.JavaConstant;
34 import jdk.vm.ci.meta.JavaKind; 35 import jdk.vm.ci.meta.JavaKind;
35 import jdk.vm.ci.meta.JavaType; 36 import jdk.vm.ci.meta.JavaType;
40 41
41 /** 42 /**
42 * HotSpot implementation of {@link ConstantReflectionProvider}. 43 * HotSpot implementation of {@link ConstantReflectionProvider}.
43 */ 44 */
44 public class HotSpotConstantReflectionProvider implements ConstantReflectionProvider, HotSpotProxified { 45 public class HotSpotConstantReflectionProvider implements ConstantReflectionProvider, HotSpotProxified {
45
46 private static final String TrustFinalDefaultFieldsProperty = "jvmci.TrustFinalDefaultFields";
47
48 /**
49 * Determines whether to treat {@code final} fields with default values as constant.
50 */
51 private static final boolean TrustFinalDefaultFields = HotSpotJVMCIRuntime.getBooleanOption(TrustFinalDefaultFieldsProperty, true);
52 46
53 protected final HotSpotJVMCIRuntimeProvider runtime; 47 protected final HotSpotJVMCIRuntimeProvider runtime;
54 protected final HotSpotMethodHandleAccessProvider methodHandleAccess; 48 protected final HotSpotMethodHandleAccessProvider methodHandleAccess;
55 protected final HotSpotMemoryAccessProviderImpl memoryAccess; 49 protected final HotSpotMemoryAccessProviderImpl memoryAccess;
56 50
250 244
251 /** 245 /**
252 * Determines if a value read from a {@code final} instance field is considered constant. The 246 * Determines if a value read from a {@code final} instance field is considered constant. The
253 * implementation in {@link HotSpotConstantReflectionProvider} returns true if {@code value} is 247 * implementation in {@link HotSpotConstantReflectionProvider} returns true if {@code value} is
254 * not the {@link JavaConstant#isDefaultForKind default value} for its kind or if 248 * not the {@link JavaConstant#isDefaultForKind default value} for its kind or if
255 * {@link #TrustFinalDefaultFields} is true. 249 * {@link Option#TrustFinalDefaultFields} is true.
256 * 250 *
257 * @param value a value read from a {@code final} instance field 251 * @param value a value read from a {@code final} instance field
258 * @param receiverClass the {@link Object#getClass() class} of object from which the 252 * @param receiverClass the {@link Object#getClass() class} of object from which the
259 * {@code value} was read 253 * {@code value} was read
260 */ 254 */
261 protected boolean isFinalInstanceFieldValueConstant(JavaConstant value, Class<?> receiverClass) { 255 protected boolean isFinalInstanceFieldValueConstant(JavaConstant value, Class<?> receiverClass) {
262 return !value.isDefaultForKind() || TrustFinalDefaultFields; 256 return !value.isDefaultForKind() || Option.TrustFinalDefaultFields.getBoolean();
263 } 257 }
264 258
265 /** 259 /**
266 * Determines if a value read from a {@link Stable} instance field is considered constant. The 260 * Determines if a value read from a {@link Stable} instance field is considered constant. The
267 * implementation in {@link HotSpotConstantReflectionProvider} returns true if {@code value} is 261 * implementation in {@link HotSpotConstantReflectionProvider} returns true if {@code value} is