--- /dev/null 2017-01-22 10:16:57.869617664 -0800 +++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/JVMCIVersionCheck.java 2017-02-15 16:59:44.021576758 -0800 @@ -0,0 +1,133 @@ +/* + * 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. + * + * 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. + */ +package org.graalvm.compiler.hotspot; + +import java.util.Formatter; + +/** + * Mechanism for checking that the current Java runtime environment supports the minimum JVMCI API + * required by Graal. The {@code JVMCI_VERSION_CHECK} environment variable can be used to ignore a + * failed check ({@code JVMCI_VERSION_CHECK=ignore}) or print a warning ( + * {@code JVMCI_VERSION_CHECK=warn}) and continue. Otherwise, a failed check results in an + * {@link InternalError} being raised or, if called from {@link #main(String[])}, the VM exiting + * with a result code of {@code -1} + * + * This class only depends on the JDK so that it can be used without building Graal. + */ +class JVMCIVersionCheck { + + private static final int JVMCI8_MIN_MAJOR_VERSION = 0; + private static final int JVMCI8_MIN_MINOR_VERSION = 23; + + // Will be updated once an ea build with the required JVMCI API is available. + private static final int JVMCI9_MIN_EA_BUILD = 143; + + private static void failVersionCheck(boolean exit, String reason, Object... args) { + Formatter errorMessage = new Formatter().format(reason, args); + String javaHome = System.getProperty("java.home"); + String vmName = System.getProperty("java.vm.name"); + errorMessage.format("Set the JVMCI_VERSION_CHECK environment variable to \"ignore\" to suppress "); + errorMessage.format("this error or to \"warn\" to emit a warning and continue execution.%n"); + errorMessage.format("Currently used Java home directory is %s.%n", javaHome); + errorMessage.format("Currently used VM configuration is: %s%n", vmName); + if (System.getProperty("java.specification.version").compareTo("1.9") < 0) { + errorMessage.format("Download the latest JVMCI JDK 8 from http://www.oracle.com/technetwork/oracle-labs/program-languages/downloads/index.html"); + } else { + errorMessage.format("Download the latest JDK 9 EA from https://jdk9.java.net/download/"); + } + String value = System.getenv("JVMCI_VERSION_CHECK"); + if ("warn".equals(value)) { + System.err.println(errorMessage.toString()); + } else if ("ignore".equals(value)) { + return; + } else if (exit) { + System.err.println(errorMessage.toString()); + System.exit(-1); + } else { + throw new InternalError(errorMessage.toString()); + } + } + + static void check(boolean exitOnFailure) { + // Don't use regular expressions to minimize Graal startup time + String vmVersion = System.getProperty("java.vm.version"); + if (System.getProperty("java.specification.version").compareTo("1.9") < 0) { + int start = vmVersion.indexOf("-jvmci-"); + if (start >= 0) { + start += "-jvmci-".length(); + int end = vmVersion.indexOf('.', start); + if (end > 0) { + int major = Integer.parseInt(vmVersion.substring(start, end)); + start = end + 1; + end = start; + while (end < vmVersion.length() && Character.isDigit(vmVersion.charAt(end))) { + end++; + } + int minor = Integer.parseInt(vmVersion.substring(start, end)); + if (major >= JVMCI8_MIN_MAJOR_VERSION && minor >= JVMCI8_MIN_MINOR_VERSION) { + return; + } + failVersionCheck(exitOnFailure, "The VM does not support the minimum JVMCI API version required by Graal: %d.%d < %d.%d.%n", + major, minor, JVMCI8_MIN_MAJOR_VERSION, JVMCI8_MIN_MINOR_VERSION); + return; + } + } + failVersionCheck(exitOnFailure, "The VM does not support the minimum JVMCI API version required by Graal.%n" + + "Cannot read JVMCI version from java.vm.version property: %s.%n", vmVersion); + } else { + if (vmVersion.contains("SNAPSHOT")) { + // The snapshot of http://hg.openjdk.java.net/jdk9/hs tip is expected to work + return; + } + if (vmVersion.contains("internal")) { + // Allow local builds + return; + } + // http://openjdk.java.net/jeps/223 + // Only support EA builds until GA is available + if (vmVersion.startsWith("9-ea+")) { + int start = "9-ea+".length(); + int end = start; + end = start; + while (end < vmVersion.length() && Character.isDigit(vmVersion.charAt(end))) { + end++; + } + int build = Integer.parseInt(vmVersion.substring(start, end)); + if (build >= JVMCI9_MIN_EA_BUILD) { + return; + } + failVersionCheck(exitOnFailure, "The VM is an insufficiently recent EA JDK9 build for Graal: %d < %d.%n", build, JVMCI9_MIN_EA_BUILD); + return; + } + failVersionCheck(exitOnFailure, "The VM does not support the minimum JVMCI API version required by Graal.%n" + + "Cannot read JDK9 EA build number from java.vm.version property: %s.%n", vmVersion); + } + } + + /** + * Command line interface for performing the check. + */ + public static void main(String[] args) { + check(true); + } +}