+++ /dev/null
-/* Copyright (c) 2014-2018. The SimGrid Team. All rights reserved. */
-
-/* This program is free software; you can redistribute it and/or modify it
- * under the terms of the license (GNU LGPL) which comes with this package. */
-
-package org.simgrid;
-
-import java.io.FileOutputStream;
-import java.io.InputStream;
-import java.io.IOException;
-import java.io.OutputStream;
-import java.io.File;
-import java.nio.file.Files;
-import java.nio.file.Path;
-
-/** Helper class loading the native functions of SimGrid that we use for downcalls
- *
- * Almost all org.simgrid.msg.* classes contain a static bloc (thus executed when the class is loaded)
- * containing a call to this.
- */
-public final class NativeLib {
- private static boolean isNativeInited = false;
- private static Path tempDir = null; // where the embeeded libraries are unpacked before loading them
-
- /** A static-only "class" don't need no constructor */
- private NativeLib() {
- throw new IllegalAccessError("Utility class");
- }
-
- /** Hidden debug main() function
- *
- * It is not the Main-Class defined in src/bindings/java/MANIFEST.in (org.simgrid.msg.Msg is),
- * so it won't get executed by default. But that's helpful to debug linkage errors, if you
- * know that it exists. It's used by cmake during the configure, to inform the user.
- */
- public static void main(String[] args) {
- System.out.println("This jarfile searches the native code under: " +getPath());
- }
-
- /** Main function loading all the native classes that we need */
- public static void nativeInit() {
- if (isNativeInited)
- return;
-
- if (System.getProperty("os.name").toLowerCase().startsWith("win"))
- NativeLib.nativeInit("winpthread-1");
-
- NativeLib.nativeInit("simgrid");
- NativeLib.nativeInit("simgrid-java");
- isNativeInited = true;
- }
-
- /** Helper function trying to load one requested library */
- public static void nativeInit(String name) {
- Throwable cause = null;
- try {
- /* Prefer the version of the library bundled into the jar file and use it */
- if (loadLibAsStream(name))
- return;
- } catch (UnsatisfiedLinkError|SecurityException|IOException e) {
- cause = e;
- }
-
- /* If not found, try to see if we can find a version on disk */
- try {
- System.loadLibrary(name);
- return;
- } catch (UnsatisfiedLinkError systemException) { /* don't care */ }
-
- System.err.println("\nCannot load the bindings to the "+name+" library in path "+getPath()+" and no usable SimGrid installation found on disk.");
- if (cause != null) {
- if (cause.getMessage().matches(".*libcgraph.so.*"))
- System.err.println("HINT: Try to install the libcgraph package (sudo apt-get install libcgraph).");
- else if (cause.getMessage().matches(".*libboost_context.so.*"))
- System.err.println("HINT: Try to install the boost-context package (sudo apt-get install libboost-context-dev).");
- else
- System.err.println("Try to install the missing dependencies, if any. Read carefully the following error message.");
-
- System.err.println();
- cause.printStackTrace();
- } else {
- System.err.println("This jar file does not seem to fit your system, and no usable SimGrid installation found on disk.");
- }
- System.exit(1);
- }
-
- /** Try to extract the library from the jarfile before loading it */
- private static boolean loadLibAsStream (String name) throws IOException, UnsatisfiedLinkError {
- String path = NativeLib.getPath();
-
- // We must write the lib onto the disk before loading it -- stupid operating systems
- if (tempDir == null) {
- tempDir = Files.createTempDirectory("simgrid-java-");
- // don't leak the files on disk, but remove it on JVM shutdown
- Runtime.getRuntime().addShutdownHook(new Thread(new FileCleaner(tempDir.toFile())));
- }
-
- /* For each possible filename of the given library on all possible OSes, try it */
- for (String filename : new String[]
- { name,
- "lib"+name+".so", /* linux */
- name+".dll", "lib"+name+".dll", /* windows (pure and mingw) */
- "lib"+name+".dylib" /* mac osx */}) {
-
- File fileOut = new File(tempDir.toFile().getAbsolutePath() + File.separator + filename);
- boolean done = false;
- try ( // Try-with-resources. These stream will be autoclosed when needed.
- InputStream in = NativeLib.class.getClassLoader().getResourceAsStream(path+filename);
- OutputStream out = new FileOutputStream(fileOut);
- ) {
- if (in != null) {
- /* copy the library in position */
- byte[] buffer = new byte[4096];
- int bytesRead;
- while ((bytesRead = in.read(buffer)) != -1) // Read until EOF
- out.write(buffer, 0, bytesRead);
- done = true;
- }
- }
- if (done) {
- /* load that library */
- System.load(fileOut.getAbsolutePath());
-
- /* It loaded! we're good */
- return true;
- }
- }
-
- /* No suitable name found */
- return false;
- }
-
- /** Find where to search for the library in the jar -- keep it aligned with where cmake puts it! */
- private static String getPath() {
- // Inspiration: https://github.com/xerial/snappy-java/blob/develop/src/main/java/org/xerial/snappy/OSInfo.java
- String prefix = "NATIVE";
- String os = System.getProperty("os.name");
- String arch = System.getProperty("os.arch");
-
- if (arch.matches("^i[3-6]86$"))
- arch = "x86";
- else if ("x86_64".equalsIgnoreCase(arch) || "AMD64".equalsIgnoreCase(arch))
- arch = "amd64";
-
- if (os.toLowerCase().startsWith("win")) {
- os = "Windows";
- } else if (os.contains("OS X")) {
- os = "Darwin";
- }
- os = os.replace(' ', '_');
- arch = arch.replace(' ', '_');
-
- return prefix + "/" + os + "/" + arch + "/";
- }
-
- /** A hackish mechanism used to remove the file containing our library when the JVM shuts down */
- private static class FileCleaner implements Runnable {
- private File dir;
- public FileCleaner(File dir) {
- this.dir = dir;
- }
- @Override
- public void run() {
- try {
- for (File f : dir.listFiles())
- if (! f.delete() && !f.getAbsolutePath().contains("appveyor")) // Be silent on AppVeyor to not break the tests. Ugly trick :)
- System.out.println("Unable to clean temporary file "+f.getAbsolutePath()+" during shutdown.");
- if (! dir.delete() && !dir.getAbsolutePath().contains("appveyor") )
- System.out.println("Unable to clean temporary file "+dir.getAbsolutePath()+" during shutdown.");
- } catch(Exception e) {
- System.out.println("Error while cleaning temporary file "+dir.getAbsolutePath()+" during shutdown: "+e.getCause());
- e.printStackTrace();
- }
- }
- }
-}
