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package org.graalvm.compiler.api.test;

import java.util.Formatter;

import org.graalvm.compiler.api.runtime.GraalJVMCICompiler;
import org.graalvm.compiler.api.runtime.GraalRuntime;

import jdk.vm.ci.runtime.JVMCI;
import jdk.vm.ci.runtime.JVMCICompiler;
import jdk.vm.ci.services.Services;

Access point for retrieving the GraalRuntime instance of the system compiler from unit tests.
/** * Access point for {@linkplain #getRuntime() retrieving} the {@link GraalRuntime} instance of the * system compiler from unit tests. */
public class Graal { private static final GraalRuntime runtime = initializeRuntime(); private static GraalRuntime initializeRuntime() { Services.initializeJVMCI(); JVMCICompiler compiler = JVMCI.getRuntime().getCompiler(); if (compiler instanceof GraalJVMCICompiler) { GraalJVMCICompiler graal = (GraalJVMCICompiler) compiler; return graal.getGraalRuntime(); } else { return new InvalidGraalRuntime(); } }
Gets the singleton GraalRuntime instance available to unit tests.
/** * Gets the singleton {@link GraalRuntime} instance available to unit tests. */
public static GraalRuntime getRuntime() { return runtime; }
Gets a capability provided by the GraalRuntime instance available to the application.
Throws:
/** * Gets a capability provided by the {@link GraalRuntime} instance available to the application. * * @throws UnsupportedOperationException if the capability is not available */
public static <T> T getRequiredCapability(Class<T> clazz) { T t = getRuntime().getCapability(clazz); if (t == null) { String javaHome = System.getProperty("java.home"); String vmName = System.getProperty("java.vm.name"); Formatter errorMessage = new Formatter(); if (getRuntime().getClass() == InvalidGraalRuntime.class) { errorMessage.format("The VM does not support the Graal API.%n"); } else { errorMessage.format("The VM does not expose required Graal capability %s.%n", clazz.getName()); } errorMessage.format("Currently used Java home directory is %s.%n", javaHome); errorMessage.format("Currently used VM configuration is: %s", vmName); throw new UnsupportedOperationException(errorMessage.toString()); } return t; } private static final class InvalidGraalRuntime implements GraalRuntime { @Override public String getName() { return ""; } @Override public <T> T getCapability(Class<T> clazz) { return null; } } }