1 /*
2 * Copyright (c) 2016, 2018, 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
24
25 package org.graalvm.compiler.hotspot;
26
27 import java.util.Formatter;
28
29 /**
30 * Mechanism for checking that the current Java runtime environment supports the minimum JVMCI API
31 * required by Graal. The {@code JVMCI_VERSION_CHECK} environment variable can be used to ignore a
32 * failed check ({@code JVMCI_VERSION_CHECK=ignore}) or print a warning (
33 * {@code JVMCI_VERSION_CHECK=warn}) and continue. Otherwise, a failed check results in an
34 * {@link InternalError} being raised or, if called from {@link #main(String[])}, the VM exiting
35 * with a result code of {@code -1}
36 *
37 * This class only depends on the JDK so that it can be used without building Graal.
38 */
39 class JVMCIVersionCheck {
40
41 // 0.55 introduces new HotSpotSpeculationLog API
42 private static final int JVMCI8_MIN_MAJOR_VERSION = 0;
43 private static final int JVMCI8_MIN_MINOR_VERSION = 55;
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 JDK 11 or later.");
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 javaSpecVersion = System.getProperty("java.specification.version");
74 String vmVersion = System.getProperty("java.vm.version");
75 if (javaSpecVersion.compareTo("1.9") < 0) {
76 int start = vmVersion.indexOf("-jvmci-");
77 if (start >= 0) {
78 start += "-jvmci-".length();
79 int end = vmVersion.indexOf('.', start);
80 if (end > 0) {
81 int major;
82 try {
83 major = Integer.parseInt(vmVersion.substring(start, end));
84 } catch (NumberFormatException e) {
85 failVersionCheck(exitOnFailure, "The VM does not support the minimum JVMCI API version required by Graal.%n" +
86 "Cannot read JVMCI major version from java.vm.version property: %s.%n", vmVersion);
87 return;
88 }
89 start = end + 1;
90 end = start;
91 while (end < vmVersion.length() && Character.isDigit(vmVersion.charAt(end))) {
92 end++;
93 }
94 int minor;
95 try {
96 minor = Integer.parseInt(vmVersion.substring(start, end));
97 } catch (NumberFormatException e) {
98 failVersionCheck(exitOnFailure, "The VM does not support the minimum JVMCI API version required by Graal.%n" +
99 "Cannot read JVMCI minor version from java.vm.version property: %s.%n", vmVersion);
100 return;
101 }
102 if (major >= JVMCI8_MIN_MAJOR_VERSION && minor >= JVMCI8_MIN_MINOR_VERSION) {
103 return;
104 }
105 failVersionCheck(exitOnFailure, "The VM does not support the minimum JVMCI API version required by Graal: %d.%d < %d.%d.%n",
106 major, minor, JVMCI8_MIN_MAJOR_VERSION, JVMCI8_MIN_MINOR_VERSION);
107 return;
108 }
109 }
110 failVersionCheck(exitOnFailure, "The VM does not support the minimum JVMCI API version required by Graal.%n" +
111 "Cannot read JVMCI version from java.vm.version property: %s.%n", vmVersion);
112 } else if (javaSpecVersion.compareTo("11") < 0) {
113 failVersionCheck(exitOnFailure, "Graal is not compatible with the JVMCI API in JDK 9 and 10.%n");
114 } else {
115 if (vmVersion.contains("SNAPSHOT")) {
116 return;
117 }
118 if (vmVersion.contains("internal")) {
119 // Allow local builds
120 return;
121 }
122 if (vmVersion.startsWith("11-ea+")) {
123 String buildString = vmVersion.substring("11-ea+".length());
124 try {
125 int build = Integer.parseInt(buildString);
126 if (build < 20) {
127 failVersionCheck(exitOnFailure, "Graal requires build 20 or later of JDK 11 early access binary, got build %d.%n", build);
128 return;
129 }
130 } catch (NumberFormatException e) {
131 failVersionCheck(exitOnFailure, "Could not parse the JDK 11 early access build number from java.vm.version property: %s.%n", vmVersion);
132 return;
133 }
134 } else {
135 // Graal is compatible with all JDK versions as of 11 GA.
136 }
137 }
138 }
139
140 /**
141 * Command line interface for performing the check.
142 */
143 public static void main(String[] args) {
144 check(true);
145 }
146 }