Mercurial > hg > graal-jvmci-8
view graal/com.oracle.graal.hotspot/src/com/oracle/graal/hotspot/HotSpotOptions.java @ 11561:e1309fc4d17f
ensure Debug.enable() is called before any DebugTimer or DebugMetric objects are requested
author | Doug Simon <doug.simon@oracle.com> |
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date | Tue, 10 Sep 2013 14:32:55 +0200 |
parents | 5a7644d5fe20 |
children | 9d9c944f2940 |
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/* * Copyright (c) 2011, 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.graal.hotspot; import static com.oracle.graal.compiler.GraalDebugConfig.*; import static java.nio.file.Files.*; import java.io.*; import java.nio.charset.*; import java.nio.file.*; import java.util.*; import com.oracle.graal.debug.*; import com.oracle.graal.hotspot.logging.*; import com.oracle.graal.options.*; /** * Called from {@code graalCompiler.cpp} to parse any Graal specific options. Such options are * (currently) distinguished by a {@code "-G:"} prefix. */ public class HotSpotOptions { private static final Map<String, OptionDescriptor> options = new HashMap<>(); /** * Initializes {@link #options} from {@link Options} services. */ private static void initializeOptions() { ServiceLoader<Options> sl = ServiceLoader.loadInstalled(Options.class); for (Options opts : sl) { for (OptionDescriptor desc : opts) { if (isHotSpotOption(desc)) { String name = desc.getName(); OptionDescriptor existing = options.put(name, desc); assert existing == null : "Option named \"" + name + "\" has multiple definitions: " + existing.getLocation() + " and " + desc.getLocation(); } } } } /** * Determines if a given option is a HotSpot command line option. */ public static boolean isHotSpotOption(OptionDescriptor desc) { return desc.getClass().getName().startsWith("com.oracle.graal"); } /** * Loads default option value overrides from a {@code graal.options} file if it exists. Each * line in this file starts with {@code "#"} and is ignored or must have the format of a Graal * command line option without the leading {@code "-G:"} prefix. These option value are set * prior to processing of any Graal options present on the command line. */ private static void loadOptionOverrides() throws InternalError { String javaHome = System.getProperty("java.home"); Path graalDotOptions = Paths.get(javaHome, "lib", "graal.options"); if (!exists(graalDotOptions)) { graalDotOptions = Paths.get(javaHome, "jre", "lib", "graal.options"); } if (exists(graalDotOptions)) { try { for (String line : Files.readAllLines(graalDotOptions, Charset.defaultCharset())) { if (!line.startsWith("#")) { if (!setOption(line)) { throw new InternalError("Invalid option \"" + line + "\" specified in " + graalDotOptions); } } } } catch (IOException e) { throw (InternalError) new InternalError().initCause(e); } } } static { initializeOptions(); loadOptionOverrides(); } // Called from VM code public static boolean setOption(String option) { if (option.length() == 0) { return false; } Object value = null; String optionName = null; String valueString = null; if (option.equals("+PrintFlags")) { printFlags(); return true; } char first = option.charAt(0); if (first == '+' || first == '-') { optionName = option.substring(1); value = (first == '+'); } else { int index = option.indexOf('='); if (index == -1) { optionName = option; valueString = null; } else { optionName = option.substring(0, index); valueString = option.substring(index + 1); } } OptionDescriptor desc = options.get(optionName); if (desc == null) { Logger.info("Could not find option " + optionName + " (use -G:+PrintFlags to see Graal options)"); return false; } Class<?> optionType = desc.getType(); if (value == null) { if (optionType == Boolean.TYPE || optionType == Boolean.class) { Logger.info("Value for boolean option '" + optionName + "' must use '-G:+" + optionName + "' or '-G:-" + optionName + "' format"); return false; } if (valueString == null) { Logger.info("Value for option '" + optionName + "' must use '-G:" + optionName + "=<value>' format"); return false; } if (optionType == Float.class) { value = Float.parseFloat(valueString); } else if (optionType == Double.class) { value = Double.parseDouble(valueString); } else if (optionType == Integer.class) { value = Integer.parseInt(valueString); } else if (optionType == String.class) { value = valueString; } } else { if (optionType != Boolean.class) { Logger.info("Value for option '" + optionName + "' must use '-G:" + optionName + "=<value>' format"); return false; } } if (value != null) { OptionValue<?> optionValue = desc.getOptionValue(); optionValue.setValue(value); // Logger.info("Set option " + fieldName + " to " + value); } else { Logger.info("Wrong value \"" + valueString + "\" for option " + optionName); return false; } return true; } /** * Called from VM code once all Graal command line options have been processed by * {@link #setOption(String)}. */ public static void finalizeOptions() { if (Dump.getValue() != null || Meter.getValue() != null || Time.getValue() != null || Log.getValue() != null || HotSpotVMConfig.getVMOption("CITime")) { Debug.enable(); } } /** * Wraps some given text to one or more lines of a given maximum width. * * @param text text to wrap * @param width maximum width of an output line, exception for words in {@code text} longer than * this value * @return {@code text} broken into lines */ private static List<String> wrap(String text, int width) { List<String> lines = Collections.singletonList(text); if (text.length() > width) { String[] chunks = text.split("\\s+"); lines = new ArrayList<>(); StringBuilder line = new StringBuilder(); for (String chunk : chunks) { if (line.length() + chunk.length() > width) { lines.add(line.toString()); line.setLength(0); } if (line.length() != 0) { line.append(' '); } String[] embeddedLines = chunk.split("%n"); if (embeddedLines.length == 1) { line.append(chunk); } else { for (int i = 0; i < embeddedLines.length; i++) { line.append(embeddedLines[i]); if (i < embeddedLines.length - 1) { lines.add(line.toString()); line.setLength(0); } } } } if (line.length() != 0) { lines.add(line.toString()); } } return lines; } private static void printFlags() { Logger.info("[Graal flags]"); SortedMap<String, OptionDescriptor> sortedOptions = new TreeMap<>(options); for (Map.Entry<String, OptionDescriptor> e : sortedOptions.entrySet()) { e.getKey(); OptionDescriptor desc = e.getValue(); Object value = desc.getOptionValue().getValue(); List<String> helpLines = wrap(desc.getHelp(), 70); Logger.info(String.format("%9s %-40s = %-14s %s", desc.getType().getSimpleName(), e.getKey(), value, helpLines.get(0))); for (int i = 1; i < helpLines.size(); i++) { Logger.info(String.format("%67s %s", " ", helpLines.get(i))); } } System.exit(0); } }