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/*
* Copyright (c) 2018, 2023, Oracle and/or its affiliates. All rights reserved.
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*
* The Universal Permissive License (UPL), Version 1.0
*
* Subject to the condition set forth below, permission is hereby granted to any
* person obtaining a copy of this software, associated documentation and/or
* data (collectively the "Software"), free of charge and under any and all
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* unmodified Software as contributed to or provided by such licensor, or (ii)
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*
* (a) the Software, and
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* (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
* one is included with the Software each a "Larger Work" to which the Software
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* Software and the Larger Work(s), and to sublicense the foregoing rights on
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package org.graalvm.home.impl;
import java.io.BufferedInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.file.DirectoryStream;
import java.nio.file.Files;
import java.nio.file.NoSuchFileException;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardOpenOption;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Properties;
import java.util.Set;
import org.graalvm.home.HomeFinder;
import org.graalvm.nativeimage.ImageInfo;
import org.graalvm.nativeimage.ProcessProperties;
/**
* This is a private implementation class. It is only public for ServiceLoader to work.
*/
public final class DefaultHomeFinder extends HomeFinder {
private static final boolean STATIC_VERBOSE = Boolean.getBoolean("com.oracle.graalvm.locator.verbose");
static final Path FORCE_GRAAL_HOME;
static final Path GRAAL_HOME_RELATIVE_PATH;
static final Map LANGUAGE_RELATIVE_HOMES = new HashMap<>();
/**
* Languages included in the native image. The variable is set at the native image build time.
* When the languages are known, there is no need to list directories at image execution time to
* find the language homes.
*/
private static Set nativeImageLanguages;
/**
* Tools included in the native image. The variable is set at the native image build time. When
* the tools are known, there is no need to list directories at image execution time to find the
* tool homes.
*/
private static Set nativeImageTools;
static {
final String forcedHome = System.getProperty("org.graalvm.launcher.home");
if (forcedHome != null && forcedHome.length() > 0) {
FORCE_GRAAL_HOME = Paths.get(forcedHome);
} else {
FORCE_GRAAL_HOME = null;
}
final String relativeHome = System.getProperty("org.graalvm.launcher.relative.home");
if (relativeHome != null && relativeHome.length() > 0) {
GRAAL_HOME_RELATIVE_PATH = Paths.get(relativeHome);
} else {
GRAAL_HOME_RELATIVE_PATH = null;
}
// Save relative paths from the launcher's directory to other language homes of the form:
// org.graalvm.launcher.relative.LANGUAGE_ID.home
// Meant to be only used for standalones, not for regular GraalVM.
for (Object property : System.getProperties().keySet()) {
if (property instanceof String) {
String name = ((String) property);
if (name.startsWith("org.graalvm.launcher.relative.") && name.endsWith(".home")) {
String after = name.substring("org.graalvm.launcher.relative.".length());
if (after.length() > ".home".length()) {
String languageId = after.substring(0, after.length() - ".home".length());
LANGUAGE_RELATIVE_HOMES.put(languageId, Paths.get(System.getProperty(name)));
}
}
}
}
}
private static final String GRAALVM_VERSION_PROPERTY = "org.graalvm.version";
private static final String GRAALVM_VERSION = System.getProperty(GRAALVM_VERSION_PROPERTY);
private static final Object HOME_NOT_FOUND = new Object();
private volatile Boolean verbose;
private volatile String version;
private volatile Object graalVMHome;
private volatile Map languageHomes;
private volatile Map toolHomes;
public DefaultHomeFinder() {
}
@Override
public Path getHomeFolder() {
Object home = graalVMHome;
if (home == null) {
Object result = searchHomeFolder();
home = result != null ? result : HOME_NOT_FOUND;
if (!ImageInfo.inImageBuildtimeCode()) {
graalVMHome = home;
}
}
if (home instanceof Path) {
return (Path) home;
} else {
assert home == HOME_NOT_FOUND;
return null;
}
}
private Path searchHomeFolder() {
if (isVerbose()) {
System.err.println("FORCE_GRAAL_HOME: " + FORCE_GRAAL_HOME);
System.err.println("GRAAL_HOME_RELATIVE_PATH: " + GRAAL_HOME_RELATIVE_PATH);
for (Entry entry : LANGUAGE_RELATIVE_HOMES.entrySet()) {
System.err.println("relative home of " + entry.getKey() + " from the launcher's directory: " + entry.getValue());
}
}
if (FORCE_GRAAL_HOME != null) {
verbose("GraalVM home forced to: ", FORCE_GRAAL_HOME);
return FORCE_GRAAL_HOME;
}
final Path home;
if (ImageInfo.inImageRuntimeCode()) {
final String graalvmHomeValue = System.getProperty("org.graalvm.home");
if (graalvmHomeValue != null) {
verbose("GraalVM home already set to: ", graalvmHomeValue);
home = Paths.get(graalvmHomeValue);
} else {
home = getGraalVmHomeNative();
verbose("Found GraalVM home: ", home);
if (home == null) {
return null;
}
}
return home;
} else {
final String javaHomeProperty = System.getProperty("java.home");
if (javaHomeProperty == null) {
throw new AssertionError("The java.home system property is not set");
}
final Path javaHome = Paths.get(javaHomeProperty);
if (!Files.exists(javaHome)) {
throw new AssertionError("Java home is not reachable.");
}
if (Files.exists(javaHome.resolve(Paths.get("lib", "modules")))) {
home = javaHome;
} else {
throw new AssertionError("Missing jimage in java.home: " + javaHome);
}
verbose("GraalVM home found by java.home property as: ", home);
return home;
}
}
@Override
public String getVersion() {
String res = version;
if (res == null) {
if (GRAALVM_VERSION != null) {
res = GRAALVM_VERSION;
} else {
res = "snapshot";
Path home = getHomeFolder();
if (home != null) {
Path releaseFile = home.resolve("release");
try (InputStream in = new BufferedInputStream(Files.newInputStream(releaseFile, StandardOpenOption.READ))) {
Properties properties = new Properties();
properties.load(in);
Object loadedVersion = properties.get("GRAALVM_VERSION");
if (loadedVersion != null) {
res = loadedVersion.toString();
if (res.startsWith("\"")) {
res = res.substring(1, res.length());
}
if (res.endsWith("\"")) {
res = res.substring(0, res.length() - 1);
}
}
} catch (IOException ioe) {
// pass with res = "snapshot"
}
}
}
if (!ImageInfo.inImageBuildtimeCode()) {
version = res;
}
}
return res;
}
@Override
public Map getLanguageHomes() {
Map res = languageHomes;
if (res == null) {
Path home = getHomeFolder();
if (home == null) {
res = Collections.unmodifiableMap(collectStandaloneHomes());
} else if (ImageInfo.inImageRuntimeCode() && nativeImageLanguages != null) {
res = new HashMap<>(nativeImageLanguages.size());
Path languagesFolder = home.resolve("languages");
for (String languageId : nativeImageLanguages) {
String enforcedHome = System.getProperty("org.graalvm.language." + languageId + ".home");
if (enforcedHome == null) {
res.put(languageId, languagesFolder.resolve(languageId));
} else {
res.put(languageId, toRealPath(Path.of(enforcedHome)));
}
}
} else {
res = collectHomes(home.resolve("languages"));
for (Object property : System.getProperties().keySet()) {
if (property instanceof String) {
String name = ((String) property);
if (name.startsWith("org.graalvm.language.") && name.endsWith(".home")) {
String after = name.substring("org.graalvm.language.".length());
if (after.length() > ".home".length()) {
String languageId = after.substring(0, after.length() - ".home".length());
if (!languageId.contains(".")) {
res.put(languageId, toRealPath(Paths.get(System.getProperty(name))));
}
}
}
}
}
res = Collections.unmodifiableMap(res);
}
if (!ImageInfo.inImageBuildtimeCode()) {
languageHomes = res;
}
}
return res;
}
private static Path toRealPath(Path p) {
try {
return p.toRealPath();
} catch (NoSuchFileException nsfe) {
return p;
} catch (IOException ioe) {
throw new RuntimeException(ioe);
}
}
@Override
public Map getToolHomes() {
Map res = toolHomes;
if (res == null) {
Path home = getHomeFolder();
if (home == null) {
res = Collections.emptyMap();
} else if (ImageInfo.inImageRuntimeCode() && nativeImageTools != null) {
res = new HashMap<>(nativeImageTools.size());
Path toolsFolder = home.resolve("tools");
for (String toolId : nativeImageTools) {
res.put(toolId, toolsFolder.resolve(toolId));
}
} else {
res = Collections.unmodifiableMap(collectHomes(home.resolve("tools")));
}
if (!ImageInfo.inImageBuildtimeCode()) {
toolHomes = res;
}
}
return res;
}
/*
* Sets a relative path to a language home if it wasn't already set by system properties that
* are read in the static initializer of this class.
*
* NOTE: this method is called reflectively by TruffleBaseFeature
*/
@SuppressWarnings("unused")
private static boolean setRelativeLanguageHomeIfNotAlreadySet(String languageId, Path homePath) {
if (FORCE_GRAAL_HOME == null && GRAAL_HOME_RELATIVE_PATH == null && LANGUAGE_RELATIVE_HOMES.get(languageId) == null) {
LANGUAGE_RELATIVE_HOMES.put(languageId, homePath);
return true;
}
return false;
}
private static Map collectHomes(Path folder) {
Map res = new HashMap<>();
try (DirectoryStream dirContent = Files.newDirectoryStream(folder, (entry) -> {
Path fileName = entry.getFileName();
if (fileName == null) {
return false;
} else {
return !fileName.toString().startsWith(".");
}
})) {
for (Path home : dirContent) {
Path filename = home.getFileName();
if (filename != null) {
res.put(filename.toString(), home);
}
}
} catch (NoSuchFileException noSuchFile) {
// folder does not exist, return empty res
} catch (IOException ioe) {
throw new RuntimeException(ioe);
}
return res;
}
private Map collectStandaloneHomes() {
Map res = new HashMap<>();
Path executableOrObjFile = null;
if (ImageInfo.isExecutable()) {
executableOrObjFile = getCurrentExecutablePath();
} else if (ImageInfo.isSharedLibrary()) {
executableOrObjFile = getCurrentObjectFilePath();
}
if (executableOrObjFile != null) {
Path launcherDir = executableOrObjFile.getParent();
for (Entry entry : LANGUAGE_RELATIVE_HOMES.entrySet()) {
Path langHome = launcherDir.resolve(entry.getValue()).normalize();
String langId = entry.getKey();
res.put(langId, langHome);
verbose("Resolved the ", langId, " home as ", langHome);
}
}
return res;
}
private Path getGraalVmHomeNative() {
if (ImageInfo.isExecutable()) {
final Path executable = getCurrentExecutablePath();
if (executable != null) {
Path result = getGraalVmHomeFromRelativeLauncherPath(executable);
if (result != null) {
verbose("GraalVM home found by executable as: ", result);
return result;
}
}
} else {
final Path objectFile = getCurrentObjectFilePath();
if (objectFile != null) {
Path result = getGraalVmHomeFromRelativeLauncherPath(objectFile);
if (result == null) {
result = getGraalVmHomeLibPolyglotFallBack(objectFile);
}
if (result != null) {
verbose("GraalVM home found by object file as: ", result);
return result;
}
}
}
return null;
}
private static Path getGraalVmHomeFromRelativeLauncherPath(Path executableOrObjFile) {
if (GRAAL_HOME_RELATIVE_PATH != null) {
Path result = trimAbsolutePath(executableOrObjFile, GRAAL_HOME_RELATIVE_PATH);
if (result != null) {
return result;
}
}
return null;
}
/**
* Fallback for the GraalVM home using location of libpolyglot in jdk layout.
*
* @param objectFile the path to libpolyglot
* @return the path to GraalVM home or null
*/
private static Path getGraalVmHomeLibPolyglotFallBack(Path objectFile) {
// /lib/polyglot/libpolyglot.so
Path parent = objectFile.getParent();
if (parent == null || !"polyglot".equals(getFileName(parent))) {
return null;
}
parent = parent.getParent();
if (parent == null || !"lib".equals(getFileName(parent))) {
return null;
}
Path home = null;
Path jdk = parent.getParent();
if (jdk != null) {
home = jdk;
}
return home != null && isJdkHome(home) ? home : null;
}
private static boolean isJdkHome(Path path) {
Path javac = path.resolve(Paths.get("bin", "javac"));
return isJreHome(path) && Files.isRegularFile(javac) && Files.isExecutable(javac);
}
private static boolean isJreHome(Path path) {
Path java = path.resolve(Paths.get("bin", "java"));
return Files.isRegularFile(java) && Files.isExecutable(java);
}
private static Path trimAbsolutePath(Path absolute, Path expectedRelative) {
Path p = expectedRelative;
Path result = absolute;
while (p != null) {
if (result == null) {
return null;
}
Path filename = result.getFileName();
if (filename == null || !filename.equals(p.getFileName())) {
return null;
}
result = result.getParent();
p = p.getParent();
}
return result;
}
private static Path getCurrentObjectFilePath() {
String path = ProcessProperties.getObjectFile(VmLocatorSymbol.SYMBOL);
return path == null ? null : Paths.get(path);
}
private static Path getCurrentExecutablePath() {
final String path = ProcessProperties.getExecutableName();
return path == null ? null : Paths.get(path);
}
private static String getFileName(Path path) {
Path fileName = path.getFileName();
return fileName == null ? null : fileName.toString();
}
private boolean isVerbose() {
if (ImageInfo.inImageBuildtimeCode()) {
return STATIC_VERBOSE;
} else {
Boolean res = verbose;
if (res == null) {
res = STATIC_VERBOSE || Boolean.parseBoolean(System.getenv("VERBOSE_GRAALVM_LOCATOR"));
verbose = res;
}
return res;
}
}
private void verbose(Object... args) {
if (isVerbose()) {
StringBuilder builder = new StringBuilder();
for (Object arg : args) {
builder.append(arg);
}
System.err.println(builder.toString());
}
}
/**
* Sets languages included in a native image.
*
* NOTE: this method is called reflectively by TruffleBaseFeature
*/
@SuppressWarnings("unused")
private static void setNativeImageLanguages(Set languages) {
nativeImageLanguages = languages;
}
/**
* Sets tools included in a native image.
*
* NOTE: this method is called reflectively by TruffleBaseFeature
*/
@SuppressWarnings("unused")
private static void setNativeImageTools(Set tools) {
nativeImageTools = tools;
}
}
