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 }