Mercurial > hg > graal-jvmci-8
diff graal/Compiler/src/com/sun/c1x/debug/TTY.java @ 2507:9ec15d6914ca
Pull over of compiler from maxine repository.
author | Thomas Wuerthinger <thomas@wuerthinger.net> |
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date | Wed, 27 Apr 2011 11:43:22 +0200 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/Compiler/src/com/sun/c1x/debug/TTY.java Wed Apr 27 11:43:22 2011 +0200 @@ -0,0 +1,239 @@ +/* + * Copyright (c) 2009, 2010, 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.sun.c1x.debug; + +import java.io.*; +import java.util.regex.*; + +import com.sun.c1x.util.*; + + +/** + * A collection of static methods for printing debug and informational output to a global {@link LogStream}. + * The output can be (temporarily) suppressed per thread through use of a {@linkplain Filter filter}. + * + * @author Doug Simon + */ +public class TTY { + + /** + * Support for thread-local suppression of {@link TTY}. + * + * @author Doug Simon + */ + public static class Filter { + private LogStream previous; + private final Thread thread = Thread.currentThread(); + + /** + * Creates an object that will suppress {@link TTY} for the current thread if the given filter does not + * {@linkplain #matches(String, Object) match} the given object. To revert the suppression state to how it was + * before this call, the {@link #remove()} method must be called on the suppression object. + * + * @param filter the pattern for matching. If {@code null}, then the match is successful. If it starts with "~", + * then a regular expression {@linkplain Pattern#matches(String, CharSequence) match} is performed + * where the regular expression is specified by {@code filter} without the "~" prefix. Otherwise, a + * simple {@linkplain String#contains(CharSequence) substring} match is performed where {@code + * filter} is the substring used. + * @param object an object whose {@linkplain Object#toString() string} value is matched against {@code filter} + */ + public Filter(String filter, Object object) { + boolean suppressed = false; + if (filter != null) { + String input = object.toString(); + if (filter.startsWith("~")) { + suppressed = !Pattern.matches(filter.substring(1), input); + } else { + suppressed = !input.contains(filter); + } + if (suppressed) { + previous = out(); + out.set(LogStream.SINK); + } + } + } + + /** + * Reverts the suppression state of {@link TTY} to how it was before this object was constructed. + */ + public void remove() { + assert thread == Thread.currentThread(); + if (previous != null) { + out.set(previous); + } + } + } + + public static final String C1X_TTY_LOG_FILE_PROPERTY = "c1x.tty.file"; + + private static final LogStream log; + static { + PrintStream out = System.out; + String value = System.getProperty(C1X_TTY_LOG_FILE_PROPERTY); + if (value != null) { + try { + out = new PrintStream(new FileOutputStream(value)); + } catch (FileNotFoundException e) { + Util.warning("Could not open log file " + value + ": " + e); + } + } + log = new LogStream(out); + } + + private static final ThreadLocal<LogStream> out = new ThreadLocal<LogStream>() { + @Override + protected LogStream initialValue() { + return log; + }; + }; + + public static boolean isSuppressed() { + return out.get() == LogStream.SINK; + } + + /** + * Gets the thread-local log stream to which the static methods of this class send their output. + * This will either be a global log stream or the global {@linkplain LogStream#SINK sink} depending + * on whether any suppression {@linkplain Filter filters} are in effect for the current thread. + */ + public static LogStream out() { + return out.get(); + } + + /** + * @see LogStream#print(String) + */ + public static void print(String s) { + out().print(s); + } + + /** + * @see LogStream#print(int) + */ + public static void print(int i) { + out().print(i); + } + + /** + * @see LogStream#print(long) + */ + public static void print(long i) { + out().print(i); + } + + /** + * @see LogStream#print(char) + */ + public static void print(char c) { + out().print(c); + } + + /** + * @see LogStream#print(boolean) + */ + public static void print(boolean b) { + out().print(b); + } + + /** + * @see LogStream#print(double) + */ + public static void print(double d) { + out().print(d); + } + + /** + * @see LogStream#print(float) + */ + public static void print(float f) { + out().print(f); + } + + /** + * @see LogStream#println(String) + */ + public static void println(String s) { + out().println(s); + } + + /** + * @see LogStream#println() + */ + public static void println() { + out().println(); + } + + /** + * @see LogStream#println(int) + */ + public static void println(int i) { + out().println(i); + } + + /** + * @see LogStream#println(long) + */ + public static void println(long l) { + out().println(l); + } + + /** + * @see LogStream#println(char) + */ + public static void println(char c) { + out().println(c); + } + + /** + * @see LogStream#println(boolean) + */ + public static void println(boolean b) { + out().println(b); + } + + /** + * @see LogStream#println(double) + */ + public static void println(double d) { + out().println(d); + } + + /** + * @see LogStream#println(float) + */ + public static void println(float f) { + out().println(f); + } + + public static void print(String format, Object... args) { + out().printf(format, args); + } + + public static void println(String format, Object... args) { + out().printf(format + "%n", args); + } + + public static void fillTo(int i) { + out().fillTo(i, ' '); + } +}