1 /* 2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 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 package org.graalvm.compiler.hotspot; 24 25 import java.util.Formatter; 26 27 /** 28 * Mechanism for checking that the current Java runtime environment supports the minimum JVMCI API 29 * required by Graal. The {@code JVMCI_VERSION_CHECK} environment variable can be used to ignore a 30 * failed check ({@code JVMCI_VERSION_CHECK=ignore}) or print a warning ( 31 * {@code JVMCI_VERSION_CHECK=warn}) and continue. Otherwise, a failed check results in an 32 * {@link InternalError} being raised or, if called from {@link #main(String[])}, the VM exiting 33 * with a result code of {@code -1} 34 * 35 * This class only depends on the JDK so that it can be used without building Graal. 36 */ 37 class JVMCIVersionCheck { 38 39 private static final int JVMCI8_MIN_MAJOR_VERSION = 0; 40 private static final int JVMCI8_MIN_MINOR_VERSION = 23; 41 42 // Will be updated once an ea build with the required JVMCI API is available. 43 private static final int JVMCI9_MIN_EA_BUILD = 143; 44 45 private static void failVersionCheck(boolean exit, String reason, Object... args) { 46 Formatter errorMessage = new Formatter().format(reason, args); 47 String javaHome = System.getProperty("java.home"); 48 String vmName = System.getProperty("java.vm.name"); 49 errorMessage.format("Set the JVMCI_VERSION_CHECK environment variable to \"ignore\" to suppress "); 50 errorMessage.format("this error or to \"warn\" to emit a warning and continue execution.%n"); 51 errorMessage.format("Currently used Java home directory is %s.%n", javaHome); 52 errorMessage.format("Currently used VM configuration is: %s%n", vmName); 53 if (System.getProperty("java.specification.version").compareTo("1.9") < 0) { 54 errorMessage.format("Download the latest JVMCI JDK 8 from http://www.oracle.com/technetwork/oracle-labs/program-languages/downloads/index.html"); 55 } else { 56 errorMessage.format("Download the latest JDK 9 EA from https://jdk9.java.net/download/"); 57 } 58 String value = System.getenv("JVMCI_VERSION_CHECK"); 59 if ("warn".equals(value)) { 60 System.err.println(errorMessage.toString()); 61 } else if ("ignore".equals(value)) { 62 return; 63 } else if (exit) { 64 System.err.println(errorMessage.toString()); 65 System.exit(-1); 66 } else { 67 throw new InternalError(errorMessage.toString()); 68 } 69 } 70 71 static void check(boolean exitOnFailure) { 72 // Don't use regular expressions to minimize Graal startup time 73 String vmVersion = System.getProperty("java.vm.version"); 74 if (System.getProperty("java.specification.version").compareTo("1.9") < 0) { 75 int start = vmVersion.indexOf("-jvmci-"); 76 if (start >= 0) { 77 start += "-jvmci-".length(); 78 int end = vmVersion.indexOf('.', start); 79 if (end > 0) { 80 int major = Integer.parseInt(vmVersion.substring(start, end)); 81 start = end + 1; 82 end = start; 83 while (end < vmVersion.length() && Character.isDigit(vmVersion.charAt(end))) { 84 end++; 85 } 86 int minor = Integer.parseInt(vmVersion.substring(start, end)); 87 if (major >= JVMCI8_MIN_MAJOR_VERSION && minor >= JVMCI8_MIN_MINOR_VERSION) { 88 return; 89 } 90 failVersionCheck(exitOnFailure, "The VM does not support the minimum JVMCI API version required by Graal: %d.%d < %d.%d.%n", 91 major, minor, JVMCI8_MIN_MAJOR_VERSION, JVMCI8_MIN_MINOR_VERSION); 92 return; 93 } 94 } 95 failVersionCheck(exitOnFailure, "The VM does not support the minimum JVMCI API version required by Graal.%n" + 96 "Cannot read JVMCI version from java.vm.version property: %s.%n", vmVersion); 97 } else { 98 if (vmVersion.contains("SNAPSHOT")) { 99 // The snapshot of http://hg.openjdk.java.net/jdk9/hs tip is expected to work 100 return; 101 } 102 if (vmVersion.contains("internal")) { 103 // Allow local builds 104 return; 105 } 106 // http://openjdk.java.net/jeps/223 107 // Only support EA builds until GA is available 108 if (vmVersion.startsWith("9-ea+")) { 109 int start = "9-ea+".length(); 110 int end = start; 111 end = start; 112 while (end < vmVersion.length() && Character.isDigit(vmVersion.charAt(end))) { 113 end++; 114 } 115 int build = Integer.parseInt(vmVersion.substring(start, end)); 116 if (build >= JVMCI9_MIN_EA_BUILD) { 117 return; 118 } 119 failVersionCheck(exitOnFailure, "The VM is an insufficiently recent EA JDK9 build for Graal: %d < %d.%n", build, JVMCI9_MIN_EA_BUILD); 120 return; 121 } 122 failVersionCheck(exitOnFailure, "The VM does not support the minimum JVMCI API version required by Graal.%n" + 123 "Cannot read JDK9 EA build number from java.vm.version property: %s.%n", vmVersion); 124 } 125 } 126 127 /** 128 * Command line interface for performing the check. 129 */ 130 public static void main(String[] args) { 131 check(true); 132 } 133 }