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*
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* 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.
*
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package org.graalvm.compiler.hotspot;
import java.util.Formatter;
import java.util.Objects;
Mechanism for checking that the current Java runtime environment supports the minimum JVMCI API required by Graal. The JVMCI_VERSION_CHECK environment variable can be used to ignore a failed check (JVMCI_VERSION_CHECK=ignore) or print a warning ( JVMCI_VERSION_CHECK=warn) and continue. Otherwise, a failed check results in an InternalError being raised or, if called from main(String[]), the VM exiting with a result code of -1 This class only depends on the JDK so that it can be used without building Graal. /**
* 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 = 26;
// MAX_VALUE indicates that no current EA version is compatible with Graal.
// Note: Keep README.md in sync with the EA version support checked here.
private static final int JVMCI9_MIN_EA_BUILD = 176;
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;
try {
major = Integer.parseInt(vmVersion.substring(start, end));
} catch (NumberFormatException e) {
failVersionCheck(exitOnFailure, "The VM does not support the minimum JVMCI API version required by Graal.%n" +
"Cannot read JVMCI major version from java.vm.version property: %s.%n", vmVersion);
return;
}
start = end + 1;
end = start;
while (end < vmVersion.length() && Character.isDigit(vmVersion.charAt(end))) {
end++;
}
int minor;
try {
minor = Integer.parseInt(vmVersion.substring(start, end));
} catch (NumberFormatException e) {
failVersionCheck(exitOnFailure, "The VM does not support the minimum JVMCI API version required by Graal.%n" +
"Cannot read JVMCI minor version from java.vm.version property: %s.%n", vmVersion);
return;
}
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/dev tip is expected to work
return;
}
if (vmVersion.contains("internal")) {
// Allow local builds
return;
}
// http://openjdk.java.net/jeps/223
if (vmVersion.startsWith("9+")) {
int start = "9+".length();
int end = start;
end = start;
while (end < vmVersion.length() && Character.isDigit(vmVersion.charAt(end))) {
end++;
}
int build;
try {
build = Integer.parseInt(vmVersion.substring(start, end));
} catch (NumberFormatException e) {
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);
return;
}
if (build >= JVMCI9_MIN_EA_BUILD) {
return;
}
// Using Object.equals suppresses Eclipse's "Dead code" warning.
// Unfortunately @SuppressWarnings("unused") can only be applied at method level.
if (Objects.equals(JVMCI9_MIN_EA_BUILD, Integer.MAX_VALUE)) {
failVersionCheck(exitOnFailure, "This version of Graal is not compatible with any JDK 9 Early Access build.%n");
} else {
failVersionCheck(exitOnFailure, "The VM is an insufficiently recent EA JDK9 build for Graal: %d < %d.%n", build, JVMCI9_MIN_EA_BUILD);
}
return;
} else {
// Graal will be compatible with all JDK versions as of 9 GA
// until a JVMCI API change is made in a 9u or later release.
}
}
}
Command line interface for performing the check.
/**
* Command line interface for performing the check.
*/
public static void main(String[] args) {
check(true);
}
}