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 package org.graalvm.compiler.serviceprovider;
26
27 import static java.lang.Thread.currentThread;
28
29 import java.io.IOException;
30 import java.io.InputStream;
31 import java.util.Iterator;
32 import java.util.List;
33 import java.util.ServiceConfigurationError;
34 import java.util.ServiceLoader;
35 import java.util.concurrent.atomic.AtomicLong;
36
37 import jdk.vm.ci.runtime.JVMCI;
38 import jdk.vm.ci.services.JVMCIPermission;
39 import jdk.vm.ci.services.Services;
40
41 /**
42 * Interface to functionality that abstracts over which JDK version Graal is running on.
43 */
44 public final class GraalServices {
45
46 private static int getJavaSpecificationVersion() {
47 String value = System.getProperty("java.specification.version");
48 if (value.startsWith("1.")) {
49 value = value.substring(2);
50 }
51 return Integer.parseInt(value);
52 }
53
54 /**
55 * The integer value corresponding to the value of the {@code java.specification.version} system
56 * property after any leading {@code "1."} has been stripped.
57 */
58 public static final int JAVA_SPECIFICATION_VERSION = getJavaSpecificationVersion();
59
60 /**
61 * Determines if the Java runtime is version 8 or earlier.
62 */
63 public static final boolean Java8OrEarlier = JAVA_SPECIFICATION_VERSION <= 8;
64
65 /**
66 * Determines if the Java runtime is version 11 or earlier.
67 */
68 public static final boolean Java11OrEarlier = JAVA_SPECIFICATION_VERSION <= 11;
69
70 private GraalServices() {
71 }
72
73 /**
74 * Gets an {@link Iterable} of the providers available for a given service.
75 *
76 * @throws SecurityException if on JDK8 and a security manager is present and it denies
77 * {@link JVMCIPermission}
78 */
79 public static <S> Iterable<S> load(Class<S> service) {
80 Iterable<S> iterable = ServiceLoader.load(service);
81 return new Iterable<>() {
82 @Override
83 public Iterator<S> iterator() {
84 Iterator<S> iterator = iterable.iterator();
85 return new Iterator<>() {
86 @Override
87 public boolean hasNext() {
88 return iterator.hasNext();
89 }
175 * A JVMCI package dynamically exported to trusted modules.
176 */
177 private static final String JVMCI_RUNTIME_PACKAGE = "jdk.vm.ci.runtime";
178 static {
179 assert JVMCI_MODULE.getPackages().contains(JVMCI_RUNTIME_PACKAGE);
180 }
181
182 /**
183 * Determines if invoking {@link Object#toString()} on an instance of {@code c} will only run
184 * trusted code.
185 */
186 public static boolean isToStringTrusted(Class<?> c) {
187 Module module = c.getModule();
188 Module jvmciModule = JVMCI_MODULE;
189 assert jvmciModule.getPackages().contains("jdk.vm.ci.runtime");
190 if (module == jvmciModule || jvmciModule.isOpen(JVMCI_RUNTIME_PACKAGE, module)) {
191 // Can access non-statically-exported package in JVMCI
192 return true;
193 }
194 return false;
195 }
196
197 /**
198 * Gets a unique identifier for this execution such as a process ID or a
199 * {@linkplain #getGlobalTimeStamp() fixed timestamp}.
200 */
201 public static String getExecutionID() {
202 return Long.toString(ProcessHandle.current().pid());
203 }
204
205 private static final AtomicLong globalTimeStamp = new AtomicLong();
206
207 /**
208 * Gets a time stamp for the current process. This method will always return the same value for
209 * the current VM execution.
210 */
211 public static long getGlobalTimeStamp() {
212 if (globalTimeStamp.get() == 0) {
213 globalTimeStamp.compareAndSet(0, System.currentTimeMillis());
214 }
|
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 package org.graalvm.compiler.serviceprovider;
26
27 import static java.lang.Thread.currentThread;
28
29 import java.io.IOException;
30 import java.io.InputStream;
31 import java.util.Arrays;
32 import java.util.Iterator;
33 import java.util.List;
34 import java.util.ServiceConfigurationError;
35 import java.util.ServiceLoader;
36 import java.util.concurrent.atomic.AtomicLong;
37
38 import jdk.vm.ci.meta.SpeculationLog.SpeculationReason;
39 import jdk.vm.ci.runtime.JVMCI;
40 import jdk.vm.ci.services.JVMCIPermission;
41 import jdk.vm.ci.services.Services;
42
43 /**
44 * Interface to functionality that abstracts over which JDK version Graal is running on.
45 */
46 public final class GraalServices {
47
48 private GraalServices() {
49 }
50
51 /**
52 * Gets an {@link Iterable} of the providers available for a given service.
53 *
54 * @throws SecurityException if on JDK8 and a security manager is present and it denies
55 * {@link JVMCIPermission}
56 */
57 public static <S> Iterable<S> load(Class<S> service) {
58 Iterable<S> iterable = ServiceLoader.load(service);
59 return new Iterable<>() {
60 @Override
61 public Iterator<S> iterator() {
62 Iterator<S> iterator = iterable.iterator();
63 return new Iterator<>() {
64 @Override
65 public boolean hasNext() {
66 return iterator.hasNext();
67 }
153 * A JVMCI package dynamically exported to trusted modules.
154 */
155 private static final String JVMCI_RUNTIME_PACKAGE = "jdk.vm.ci.runtime";
156 static {
157 assert JVMCI_MODULE.getPackages().contains(JVMCI_RUNTIME_PACKAGE);
158 }
159
160 /**
161 * Determines if invoking {@link Object#toString()} on an instance of {@code c} will only run
162 * trusted code.
163 */
164 public static boolean isToStringTrusted(Class<?> c) {
165 Module module = c.getModule();
166 Module jvmciModule = JVMCI_MODULE;
167 assert jvmciModule.getPackages().contains("jdk.vm.ci.runtime");
168 if (module == jvmciModule || jvmciModule.isOpen(JVMCI_RUNTIME_PACKAGE, module)) {
169 // Can access non-statically-exported package in JVMCI
170 return true;
171 }
172 return false;
173 }
174
175 /**
176 * An implementation of {@link SpeculationReason} based on direct, unencoded values.
177 */
178 static final class DirectSpeculationReason implements SpeculationReason {
179 final int groupId;
180 final String groupName;
181 final Object[] context;
182
183 DirectSpeculationReason(int groupId, String groupName, Object[] context) {
184 this.groupId = groupId;
185 this.groupName = groupName;
186 this.context = context;
187 }
188
189 @Override
190 public boolean equals(Object obj) {
191 if (obj instanceof DirectSpeculationReason) {
192 DirectSpeculationReason that = (DirectSpeculationReason) obj;
193 return this.groupId == that.groupId && Arrays.equals(this.context, that.context);
194 }
195 return false;
196 }
197
198 @Override
199 public int hashCode() {
200 return groupId + Arrays.hashCode(this.context);
201 }
202
203 @Override
204 public String toString() {
205 return String.format("%s@%d%s", groupName, groupId, Arrays.toString(context));
206 }
207 }
208
209 static SpeculationReason createSpeculationReason(int groupId, String groupName, Object... context) {
210 return new DirectSpeculationReason(groupId, groupName, context);
211 }
212
213 /**
214 * Gets a unique identifier for this execution such as a process ID or a
215 * {@linkplain #getGlobalTimeStamp() fixed timestamp}.
216 */
217 public static String getExecutionID() {
218 return Long.toString(ProcessHandle.current().pid());
219 }
220
221 private static final AtomicLong globalTimeStamp = new AtomicLong();
222
223 /**
224 * Gets a time stamp for the current process. This method will always return the same value for
225 * the current VM execution.
226 */
227 public static long getGlobalTimeStamp() {
228 if (globalTimeStamp.get() == 0) {
229 globalTimeStamp.compareAndSet(0, System.currentTimeMillis());
230 }
|