Mercurial > hg > graal-jvmci-8
view jvmci/jdk.vm.ci.options/src/jdk/vm/ci/options/OptionsParser.java @ 22685:3039e5bb94cb
initialize JVMCI eagerly if either the PrintFlags or ShowFlags JVMCI option is present
author | Doug Simon <doug.simon@oracle.com> |
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date | Thu, 15 Oct 2015 17:32:19 +0200 |
parents | 1bbd4a7c274b |
children | d43f6d932ad5 |
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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 jdk.vm.ci.options; import static jdk.vm.ci.inittimer.InitTimer.timer; import java.io.BufferedReader; import java.io.File; import java.io.FileReader; import java.io.IOException; import java.io.PrintStream; import java.util.ArrayList; import java.util.Collections; import java.util.Formatter; import java.util.List; import java.util.Map; import java.util.ServiceLoader; import java.util.SortedMap; import jdk.vm.ci.inittimer.InitTimer; /** * This class contains methods for parsing JVMCI options and matching them against a set of * {@link OptionDescriptors}. The {@link OptionDescriptors} are loaded from JVMCI jars, either * {@linkplain JVMCIJarsOptionDescriptorsProvider directly} or via a {@link ServiceLoader}. */ public class OptionsParser { private static final OptionValue<Boolean> PrintFlags = new OptionValue<>(false); private static final OptionValue<Boolean> ShowFlags = new OptionValue<>(false); /** * A service for looking up {@link OptionDescriptor}s. */ public interface OptionDescriptorsProvider { /** * Gets the {@link OptionDescriptor} matching a given option {@linkplain Option#name() name} * or null if no option of that name is provided by this object. */ OptionDescriptor get(String name); } public interface OptionConsumer { void set(OptionDescriptor desc, Object value); } /** * Parses the options in {@code <jre>/lib/jvmci/options} if {@code parseOptionsFile == true} and * the file exists followed by the JVMCI options in {@code options} if {@code options != null}. * * Called from VM. This method has an object return type to allow it to be called with a VM * utility function used to call other static initialization methods. * * @param options JVMCI options as serialized (name, value) pairs * @param parseOptionsFile specifies whether to look for and parse * {@code <jre>/lib/jvmci.options} */ @SuppressWarnings("try") public static Boolean parseOptionsFromVM(String[] options, boolean parseOptionsFile) { try (InitTimer t = timer("ParseOptions")) { JVMCIJarsOptionDescriptorsProvider odp = JVMCIJarsOptionDescriptorsProvider.create(); if (parseOptionsFile) { File javaHome = new File(System.getProperty("java.home")); File lib = new File(javaHome, "lib"); File jvmci = new File(lib, "jvmci"); File jvmciOptions = new File(jvmci, "options"); if (jvmciOptions.exists()) { try (BufferedReader br = new BufferedReader(new FileReader(jvmciOptions))) { String optionSetting = null; int lineNo = 1; while ((optionSetting = br.readLine()) != null) { if (!optionSetting.isEmpty() && optionSetting.charAt(0) != '#') { try { parseOptionSetting(optionSetting, null, odp); } catch (Throwable e) { throw new InternalError("Error parsing " + jvmciOptions + ", line " + lineNo, e); } } lineNo++; } } catch (IOException e) { throw new InternalError("Error reading " + jvmciOptions, e); } } } if (options != null) { assert options.length % 2 == 0; for (int i = 0; i < options.length / 2; i++) { String name = options[i * 2]; String value = options[i * 2 + 1]; parseOption(name, value, null, odp, null); } } } return Boolean.TRUE; } /** * Parses a given option setting. * * @param optionSetting a string matching the pattern {@code <name>=<value>} * @param setter the object to notify of the parsed option and value */ public static void parseOptionSetting(String optionSetting, OptionConsumer setter, OptionDescriptorsProvider odp) { int eqIndex = optionSetting.indexOf('='); if (eqIndex == -1) { throw new InternalError("Option setting has does not match the pattern <name>=<value>: " + optionSetting); } String name = optionSetting.substring(0, eqIndex); String value = optionSetting.substring(eqIndex + 1); parseOption(name, value, setter, odp, null); } /** * Resolves {@code options} to a non-null value. This ensures {@link OptionsLoader#options} is * only loaded if necessary. */ private static SortedMap<String, OptionDescriptor> resolveOptions(SortedMap<String, OptionDescriptor> options) { return options != null ? options : OptionsLoader.options; } /** * Parses a given option name and value. * * @param name the option name * @param valueString the option value as a string * @param setter the object to notify of the parsed option and value * @param odp if non-null, the service to use for looking up {@link OptionDescriptor}s * @param options the options database to use if {@code odp} is null * @throws IllegalArgumentException if there's a problem parsing {@code option} */ public static void parseOption(String name, String valueString, OptionConsumer setter, OptionDescriptorsProvider odp, SortedMap<String, OptionDescriptor> options) { OptionDescriptor desc = odp != null ? odp.get(name) : resolveOptions(options).get(name); if (desc == null) { if (name.equals("PrintFlags")) { desc = OptionDescriptor.create("PrintFlags", Boolean.class, "Prints all JVMCI flags and exits", OptionsParser.class, "PrintFlags", PrintFlags); } else if (name.equals("ShowFlags")) { desc = OptionDescriptor.create("ShowFlags", Boolean.class, "Prints all JVMCI flags and continues", OptionsParser.class, "ShowFlags", ShowFlags); } } if (desc == null) { List<OptionDescriptor> matches = fuzzyMatch(resolveOptions(options), name); Formatter msg = new Formatter(); msg.format("Could not find option %s", name); if (!matches.isEmpty()) { msg.format("%nDid you mean one of the following?"); for (OptionDescriptor match : matches) { msg.format("%n %s=<value>", match.getName()); } } throw new IllegalArgumentException(msg.toString()); } Class<?> optionType = desc.getType(); Object value; if (optionType == Boolean.class) { if ("true".equals(valueString)) { value = Boolean.TRUE; } else if ("false".equals(valueString)) { value = Boolean.FALSE; } else { throw new IllegalArgumentException("Boolean option '" + name + "' must have value \"true\" or \"false\", not \"" + valueString + "\""); } } else if (optionType == Float.class) { value = Float.parseFloat(valueString); } else if (optionType == Double.class) { value = Double.parseDouble(valueString); } else if (optionType == Integer.class) { value = Integer.valueOf((int) parseLong(valueString)); } else if (optionType == Long.class) { value = Long.valueOf(parseLong(valueString)); } else if (optionType == String.class) { value = valueString; } else { throw new IllegalArgumentException("Wrong value for option '" + name + "'"); } if (setter == null) { desc.getOptionValue().setValue(value); } else { setter.set(desc, value); } if (PrintFlags.getValue() || ShowFlags.getValue()) { printFlags(resolveOptions(options), "JVMCI", System.out); if (PrintFlags.getValue()) { System.exit(0); } } } private static long parseLong(String v) { String valueString = v.toLowerCase(); long scale = 1; if (valueString.endsWith("k")) { scale = 1024L; } else if (valueString.endsWith("m")) { scale = 1024L * 1024L; } else if (valueString.endsWith("g")) { scale = 1024L * 1024L * 1024L; } else if (valueString.endsWith("t")) { scale = 1024L * 1024L * 1024L * 1024L; } if (scale != 1) { /* Remove trailing scale character. */ valueString = valueString.substring(0, valueString.length() - 1); } return Long.parseLong(valueString) * scale; } /** * 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", -2); 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; } public static void printFlags(SortedMap<String, OptionDescriptor> sortedOptions, String prefix, PrintStream out) { out.println("[List of " + prefix + " 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); out.println(String.format("%9s %-40s = %-14s %s", desc.getType().getSimpleName(), e.getKey(), value, helpLines.get(0))); for (int i = 1; i < helpLines.size(); i++) { out.println(String.format("%67s %s", " ", helpLines.get(i))); } } } /** * Compute string similarity based on Dice's coefficient. * * Ported from str_similar() in globals.cpp. */ static float stringSimiliarity(String str1, String str2) { int hit = 0; for (int i = 0; i < str1.length() - 1; ++i) { for (int j = 0; j < str2.length() - 1; ++j) { if ((str1.charAt(i) == str2.charAt(j)) && (str1.charAt(i + 1) == str2.charAt(j + 1))) { ++hit; break; } } } return 2.0f * hit / (str1.length() + str2.length()); } private static final float FUZZY_MATCH_THRESHOLD = 0.7F; /** * Returns the set of options that fuzzy match a given option name. */ private static List<OptionDescriptor> fuzzyMatch(SortedMap<String, OptionDescriptor> options, String optionName) { List<OptionDescriptor> matches = new ArrayList<>(); for (Map.Entry<String, OptionDescriptor> e : options.entrySet()) { float score = stringSimiliarity(e.getKey(), optionName); if (score >= FUZZY_MATCH_THRESHOLD) { matches.add(e.getValue()); } } return matches; } }