--- a/jdk/src/solaris/classes/java/lang/UNIXProcess.java.solaris Thu May 15 10:40:27 2014 -0700
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,395 +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.*;
-import java.util.concurrent.TimeUnit;
-import java.security.AccessController;
-import java.security.PrivilegedAction;
-
-/* java.lang.Process subclass in the UNIX environment.
- *
- * @author Mario Wolczko and Ross Knippel.
- */
-
-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 OutputStream stdin_stream;
- private InputStream stdout_stream;
- private DeferredCloseInputStream stdout_inner_stream;
- private InputStream stderr_stream;
-
- private static enum LaunchMechanism {
- FORK(1),
- POSIX_SPAWN(2);
-
- private int value;
- LaunchMechanism(int x) {value = x;}
- };
-
- /* On Solaris, 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<LaunchMechanism>()
- {
- public LaunchMechanism run() {
- String javahome = System.getProperty("java.home");
- String osArch = System.getProperty("os.arch");
- if (osArch.equals("x86")) {
- osArch = "i386";
- } else if (osArch.equals("x86_64")) {
- osArch = "amd64";
- }
-
- helperpath = toCString(javahome + "/lib/" + osArch + "/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 std_fds array of 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 <em>not</em> -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[] std_fds,
- boolean redirectErrorStream)
- throws IOException;
-
- UNIXProcess(final byte[] prog,
- final byte[] argBlock, int argc,
- final byte[] envBlock, int envc,
- final byte[] dir,
- final int[] std_fds,
- final boolean redirectErrorStream)
- throws IOException {
- pid = forkAndExec(launchMechanism.value,
- helperpath,
- prog,
- argBlock, argc,
- envBlock, envc,
- dir,
- std_fds,
- redirectErrorStream);
-
- java.security.AccessController.doPrivileged(
- new java.security.PrivilegedAction<Void>() { public Void run() {
- if (std_fds[0] == -1)
- stdin_stream = ProcessBuilder.NullOutputStream.INSTANCE;
- else {
- FileDescriptor stdin_fd = new FileDescriptor();
- fdAccess.set(stdin_fd, std_fds[0]);
- stdin_stream = new BufferedOutputStream(
- new FileOutputStream(stdin_fd));
- }
-
- if (std_fds[1] == -1)
- stdout_stream = ProcessBuilder.NullInputStream.INSTANCE;
- else {
- FileDescriptor stdout_fd = new FileDescriptor();
- fdAccess.set(stdout_fd, std_fds[1]);
- stdout_inner_stream = new DeferredCloseInputStream(stdout_fd);
- stdout_stream = new BufferedInputStream(stdout_inner_stream);
- }
-
- if (std_fds[2] == -1)
- stderr_stream = ProcessBuilder.NullInputStream.INSTANCE;
- else {
- FileDescriptor stderr_fd = new FileDescriptor();
- fdAccess.set(stderr_fd, std_fds[2]);
- stderr_stream = new DeferredCloseInputStream(stderr_fd);
- }
-
- return null; }});
-
- /*
- * For each subprocess forked a corresponding reaper thread
- * is started. That thread is the only thread which waits
- * for the subprocess to terminate and it doesn't hold any
- * locks while doing so. This design allows waitFor() and
- * exitStatus() to be safely executed in parallel (and they
- * need no native code).
- */
-
- java.security.AccessController.doPrivileged(
- new java.security.PrivilegedAction<Void>() { public Void run() {
- Thread t = new Thread("process reaper") {
- public void run() {
- int res = waitForProcessExit(pid);
- synchronized (UNIXProcess.this) {
- hasExited = true;
- exitcode = res;
- UNIXProcess.this.notifyAll();
- }
- }
- };
- t.setDaemon(true);
- t.start();
- return null; }});
- }
-
- public OutputStream getOutputStream() {
- return stdin_stream;
- }
-
- public InputStream getInputStream() {
- return stdout_stream;
- }
-
- public InputStream getErrorStream() {
- return stderr_stream;
- }
-
- 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 synchronized 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.
- if (!hasExited)
- destroyProcess(pid, force);
- try {
- stdin_stream.close();
- if (stdout_inner_stream != null)
- stdout_inner_stream.closeDeferred(stdout_stream);
- if (stderr_stream instanceof DeferredCloseInputStream)
- ((DeferredCloseInputStream) stderr_stream)
- .closeDeferred(stderr_stream);
- } catch (IOException e) {
- // ignore
- }
- }
-
- public void destroy() {
- destroy(false);
- }
-
- @Override
- public Process destroyForcibly() {
- destroy(true);
- return this;
- }
-
- @Override
- public synchronized boolean isAlive() {
- return !hasExited;
- }
-
- // A FileInputStream that supports the deferment of the actual close
- // operation until the last pending I/O operation on the stream has
- // finished. This is required on Solaris because we must close the stdin
- // and stdout streams in the destroy method in order to reclaim the
- // underlying file descriptors. Doing so, however, causes any thread
- // currently blocked in a read on one of those streams to receive an
- // IOException("Bad file number"), which is incompatible with historical
- // behavior. By deferring the close we allow any pending reads to see -1
- // (EOF) as they did before.
- //
- private static class DeferredCloseInputStream
- extends FileInputStream
- {
-
- private DeferredCloseInputStream(FileDescriptor fd) {
- super(fd);
- }
-
- private Object lock = new Object(); // For the following fields
- private boolean closePending = false;
- private int useCount = 0;
- private InputStream streamToClose;
-
- private void raise() {
- synchronized (lock) {
- useCount++;
- }
- }
-
- private void lower() throws IOException {
- synchronized (lock) {
- useCount--;
- if (useCount == 0 && closePending) {
- streamToClose.close();
- }
- }
- }
-
- // stc is the actual stream to be closed; it might be this object, or
- // it might be an upstream object for which this object is downstream.
- //
- private void closeDeferred(InputStream stc) throws IOException {
- synchronized (lock) {
- if (useCount == 0) {
- stc.close();
- } else {
- closePending = true;
- streamToClose = stc;
- }
- }
- }
-
- public void close() throws IOException {
- synchronized (lock) {
- useCount = 0;
- closePending = false;
- }
- super.close();
- }
-
- public int read() throws IOException {
- raise();
- try {
- return super.read();
- } finally {
- lower();
- }
- }
-
- public int read(byte[] b) throws IOException {
- raise();
- try {
- return super.read(b);
- } finally {
- lower();
- }
- }
-
- public int read(byte[] b, int off, int len) throws IOException {
- raise();
- try {
- return super.read(b, off, len);
- } finally {
- lower();
- }
- }
-
- public long skip(long n) throws IOException {
- raise();
- try {
- return super.skip(n);
- } finally {
- lower();
- }
- }
-
- public int available() throws IOException {
- raise();
- try {
- return super.available();
- } finally {
- lower();
- }
- }
-
- }
-
- private static native void init();
-
- static {
- init();
- }
-}