--- old/src/solaris/classes/java/lang/UNIXProcess.java.bsd 2014-04-01 14:18:32.446740673 +0200 +++ /dev/null 2014-03-31 12:02:08.148468519 +0200 @@ -1,408 +0,0 @@ -/* - * Copyright (c) 1995, 2013, Oracle and/or its affiliates. All rights reserved. - * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. - * - * This code is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License version 2 only, as - * published by the Free Software Foundation. Oracle designates this - * particular file as subject to the "Classpath" exception as provided - * by Oracle in the LICENSE file that accompanied this code. - * - * This code is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License - * 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. - * - * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA - * or visit www.oracle.com if you need additional information or have any - * questions. - */ - -package java.lang; - -import java.io.BufferedInputStream; -import java.io.BufferedOutputStream; -import java.io.ByteArrayInputStream; -import java.io.FileDescriptor; -import java.io.FileInputStream; -import java.io.FileOutputStream; -import java.io.IOException; -import java.io.InputStream; -import java.io.OutputStream; -import java.util.Arrays; -import java.util.concurrent.Executors; -import java.util.concurrent.Executor; -import java.util.concurrent.ThreadFactory; -import java.util.concurrent.TimeUnit; -import java.security.AccessController; -import static java.security.AccessController.doPrivileged; -import java.security.PrivilegedAction; -import java.security.PrivilegedActionException; -import java.security.PrivilegedExceptionAction; - -/** - * java.lang.Process subclass in the UNIX environment. - * - * @author Mario Wolczko and Ross Knippel. - * @author Konstantin Kladko (ported to Bsd) - * @author Martin Buchholz - */ -final class UNIXProcess extends Process { - private static final sun.misc.JavaIOFileDescriptorAccess fdAccess - = sun.misc.SharedSecrets.getJavaIOFileDescriptorAccess(); - - private final int pid; - private int exitcode; - private boolean hasExited; - - private /* final */ OutputStream stdin; - private /* final */ InputStream stdout; - private /* final */ InputStream stderr; - - private static enum LaunchMechanism { - FORK(1), - POSIX_SPAWN(2); - - private int value; - LaunchMechanism(int x) {value = x;} - }; - - /* On BSD, the default is to spawn */ - private static final LaunchMechanism launchMechanism; - private static byte[] helperpath; - - private static byte[] toCString(String s) { - if (s == null) - return null; - byte[] bytes = s.getBytes(); - byte[] result = new byte[bytes.length + 1]; - System.arraycopy(bytes, 0, - result, 0, - bytes.length); - result[result.length-1] = (byte)0; - return result; - } - - static { - launchMechanism = AccessController.doPrivileged( - new PrivilegedAction() - { - public LaunchMechanism run() { - String javahome = System.getProperty("java.home"); - - helperpath = toCString(javahome + "/lib/jspawnhelper"); - String s = System.getProperty( - "jdk.lang.Process.launchMechanism", "posix_spawn"); - - try { - return LaunchMechanism.valueOf(s.toUpperCase()); - } catch (IllegalArgumentException e) { - throw new Error(s + " is not a supported " + - "process launch mechanism on this platform."); - } - } - }); - } - - /* this is for the reaping thread */ - private native int waitForProcessExit(int pid); - - /** - * Create a process. Depending on the mode flag, this is done by - * one of the following mechanisms. - * - fork(2) and exec(2) - * - posix_spawn(2) - * - * @param fds an array of three file descriptors. - * Indexes 0, 1, and 2 correspond to standard input, - * standard output and standard error, respectively. On - * input, a value of -1 means to create a pipe to connect - * child and parent processes. On output, a value which - * is not -1 is the parent pipe fd corresponding to the - * pipe which has been created. An element of this array - * is -1 on input if and only if it is not -1 on - * output. - * @return the pid of the subprocess - */ - private native int forkAndExec(int mode, byte[] helperpath, - byte[] prog, - byte[] argBlock, int argc, - byte[] envBlock, int envc, - byte[] dir, - int[] fds, - boolean redirectErrorStream) - throws IOException; - - /** - * The thread factory used to create "process reaper" daemon threads. - */ - private static class ProcessReaperThreadFactory implements ThreadFactory { - private final static ThreadGroup group = getRootThreadGroup(); - - private static ThreadGroup getRootThreadGroup() { - return doPrivileged(new PrivilegedAction () { - public ThreadGroup run() { - ThreadGroup root = Thread.currentThread().getThreadGroup(); - while (root.getParent() != null) - root = root.getParent(); - return root; - }}); - } - - public Thread newThread(Runnable grimReaper) { - // Our thread stack requirement is quite modest. - Thread t = new Thread(group, grimReaper, "process reaper", 32768); - t.setDaemon(true); - // A small attempt (probably futile) to avoid priority inversion - t.setPriority(Thread.MAX_PRIORITY); - return t; - } - } - - /** - * The thread pool of "process reaper" daemon threads. - */ - private static final Executor processReaperExecutor = - doPrivileged(new PrivilegedAction() { - public Executor run() { - return Executors.newCachedThreadPool - (new ProcessReaperThreadFactory()); - }}); - - UNIXProcess(final byte[] prog, - final byte[] argBlock, final int argc, - final byte[] envBlock, final int envc, - final byte[] dir, - final int[] fds, - final boolean redirectErrorStream) - throws IOException { - - pid = forkAndExec(launchMechanism.value, - helperpath, - prog, - argBlock, argc, - envBlock, envc, - dir, - fds, - redirectErrorStream); - - try { - doPrivileged(new PrivilegedExceptionAction() { - public Void run() throws IOException { - initStreams(fds); - return null; - }}); - } catch (PrivilegedActionException ex) { - throw (IOException) ex.getException(); - } - } - - static FileDescriptor newFileDescriptor(int fd) { - FileDescriptor fileDescriptor = new FileDescriptor(); - fdAccess.set(fileDescriptor, fd); - return fileDescriptor; - } - - void initStreams(int[] fds) throws IOException { - stdin = (fds[0] == -1) ? - ProcessBuilder.NullOutputStream.INSTANCE : - new ProcessPipeOutputStream(fds[0]); - - stdout = (fds[1] == -1) ? - ProcessBuilder.NullInputStream.INSTANCE : - new ProcessPipeInputStream(fds[1]); - - stderr = (fds[2] == -1) ? - ProcessBuilder.NullInputStream.INSTANCE : - new ProcessPipeInputStream(fds[2]); - - processReaperExecutor.execute(new Runnable() { - public void run() { - int exitcode = waitForProcessExit(pid); - UNIXProcess.this.processExited(exitcode); - }}); - } - - void processExited(int exitcode) { - synchronized (this) { - this.exitcode = exitcode; - hasExited = true; - notifyAll(); - } - - if (stdout instanceof ProcessPipeInputStream) - ((ProcessPipeInputStream) stdout).processExited(); - - if (stderr instanceof ProcessPipeInputStream) - ((ProcessPipeInputStream) stderr).processExited(); - - if (stdin instanceof ProcessPipeOutputStream) - ((ProcessPipeOutputStream) stdin).processExited(); - } - - public OutputStream getOutputStream() { - return stdin; - } - - public InputStream getInputStream() { - return stdout; - } - - public InputStream getErrorStream() { - return stderr; - } - - public synchronized int waitFor() throws InterruptedException { - while (!hasExited) { - wait(); - } - return exitcode; - } - - @Override - public synchronized boolean waitFor(long timeout, TimeUnit unit) - throws InterruptedException - { - if (hasExited) return true; - if (timeout <= 0) return false; - - long timeoutAsNanos = unit.toNanos(timeout); - long startTime = System.nanoTime(); - long rem = timeoutAsNanos; - - while (!hasExited && (rem > 0)) { - wait(Math.max(TimeUnit.NANOSECONDS.toMillis(rem), 1)); - rem = timeoutAsNanos - (System.nanoTime() - startTime); - } - return hasExited; - } - - public synchronized int exitValue() { - if (!hasExited) { - throw new IllegalThreadStateException("process hasn't exited"); - } - return exitcode; - } - - private static native void destroyProcess(int pid, boolean force); - private void destroy(boolean force) { - // There is a risk that pid will be recycled, causing us to - // kill the wrong process! So we only terminate processes - // that appear to still be running. Even with this check, - // there is an unavoidable race condition here, but the window - // is very small, and OSes try hard to not recycle pids too - // soon, so this is quite safe. - synchronized (this) { - if (!hasExited) - destroyProcess(pid, force); - } - try { stdin.close(); } catch (IOException ignored) {} - try { stdout.close(); } catch (IOException ignored) {} - try { stderr.close(); } catch (IOException ignored) {} - } - - public void destroy() { - destroy(false); - } - - @Override - public Process destroyForcibly() { - destroy(true); - return this; - } - - @Override - public synchronized boolean isAlive() { - return !hasExited; - } - - private static native void init(); - - static { - init(); - } - - /** - * A buffered input stream for a subprocess pipe file descriptor - * that allows the underlying file descriptor to be reclaimed when - * the process exits, via the processExited hook. - * - * This is tricky because we do not want the user-level InputStream to be - * closed until the user invokes close(), and we need to continue to be - * able to read any buffered data lingering in the OS pipe buffer. - */ - static class ProcessPipeInputStream extends BufferedInputStream { - private final Object closeLock = new Object(); - - ProcessPipeInputStream(int fd) { - super(new FileInputStream(newFileDescriptor(fd))); - } - private static byte[] drainInputStream(InputStream in) - throws IOException { - int n = 0; - int j; - byte[] a = null; - while ((j = in.available()) > 0) { - a = (a == null) ? new byte[j] : Arrays.copyOf(a, n + j); - n += in.read(a, n, j); - } - return (a == null || n == a.length) ? a : Arrays.copyOf(a, n); - } - - /** Called by the process reaper thread when the process exits. */ - synchronized void processExited() { - synchronized (closeLock) { - try { - InputStream in = this.in; - // this stream is closed if and only if: in == null - if (in != null) { - byte[] stragglers = drainInputStream(in); - in.close(); - this.in = (stragglers == null) ? - ProcessBuilder.NullInputStream.INSTANCE : - new ByteArrayInputStream(stragglers); - } - } catch (IOException ignored) {} - } - } - - @Override - public void close() throws IOException { - // BufferedInputStream#close() is not synchronized unlike most other methods. - // Synchronizing helps avoid race with processExited(). - synchronized (closeLock) { - super.close(); - } - } - } - - /** - * A buffered output stream for a subprocess pipe file descriptor - * that allows the underlying file descriptor to be reclaimed when - * the process exits, via the processExited hook. - */ - static class ProcessPipeOutputStream extends BufferedOutputStream { - ProcessPipeOutputStream(int fd) { - super(new FileOutputStream(newFileDescriptor(fd))); - } - - /** Called by the process reaper thread when the process exits. */ - synchronized void processExited() { - OutputStream out = this.out; - if (out != null) { - try { - out.close(); - } catch (IOException ignored) { - // We know of no reason to get an IOException, but if - // we do, there's nothing else to do but carry on. - } - this.out = ProcessBuilder.NullOutputStream.INSTANCE; - } - } - } -}