Mercurial > hg > truffle
view graal/com.oracle.jvmci.hotspot/src/com/oracle/jvmci/hotspot/PrintStreamOption.java @ 21551:5324104ac4f3
moved com.oracle.graal.hotspot.jvmci classes to com.oracle.jvmci.hotspot module (JBS:GRAAL-53)
author | Doug Simon <doug.simon@oracle.com> |
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date | Tue, 26 May 2015 17:13:37 +0200 |
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/* * Copyright (c) 2014, 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. * * 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 com.oracle.jvmci.hotspot; import java.io.*; import java.lang.management.*; import com.oracle.graal.options.*; /** * An option that encapsulates and configures a print stream. */ public class PrintStreamOption extends OptionValue<String> { public PrintStreamOption() { super(null); } /** * The print stream to which output will be written. * * Declared {@code volatile} to enable safe use of double-checked locking in * {@link #getStream(CompilerToVM)} and {@link #setValue(Object)}. */ private volatile PrintStream ps; /** * Replace any instance of %p with a an identifying name. Try to get it from the RuntimeMXBean * name. * * @return the name of the file to log to */ private String getFilename() { String name = getValue(); if (name.contains("%p")) { String runtimeName = ManagementFactory.getRuntimeMXBean().getName(); try { int index = runtimeName.indexOf('@'); if (index != -1) { long pid = Long.parseLong(runtimeName.substring(0, index)); runtimeName = Long.toString(pid); } name = name.replaceAll("%p", runtimeName); } catch (NumberFormatException e) { } } return name; } /** * Gets the print stream configured by this option. If no file is configured, the print stream * will output to {@link CompilerToVM#writeDebugOutput(byte[], int, int)}. */ public PrintStream getStream(final CompilerToVM compilerToVM) { if (ps == null) { if (getValue() != null) { synchronized (this) { if (ps == null) { try { final boolean enableAutoflush = true; ps = new PrintStream(new FileOutputStream(getFilename()), enableAutoflush); /* Add the JVM and Java arguments to the log file to help identity it. */ String inputArguments = String.join(" ", ManagementFactory.getRuntimeMXBean().getInputArguments()); ps.println("VM Arguments: " + inputArguments); String cmd = System.getProperty("sun.java.command"); if (cmd != null) { ps.println("sun.java.command=" + cmd); } } catch (FileNotFoundException e) { throw new RuntimeException("couldn't open file: " + getValue(), e); } } } } else { OutputStream ttyOut = new OutputStream() { @Override public void write(byte[] b, int off, int len) throws IOException { if (b == null) { throw new NullPointerException(); } else if (off < 0 || off > b.length || len < 0 || (off + len) > b.length || (off + len) < 0) { throw new IndexOutOfBoundsException(); } else if (len == 0) { return; } compilerToVM.writeDebugOutput(b, off, len); } @Override public void write(int b) throws IOException { write(new byte[]{(byte) b}, 0, 1); } @Override public void flush() throws IOException { compilerToVM.flushDebugOutput(); } }; ps = new PrintStream(ttyOut); } } return ps; } @Override public void setValue(Object v) { if (ps != null) { synchronized (this) { if (ps != null) { ps.close(); ps = null; } } } super.setValue(v); } }