| /* |
| * Copyright (c) 2012, 2015, 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 org.graalvm.compiler.debug; |
| |
| import java.util.Arrays; |
| import java.util.regex.Pattern; |
| |
| import org.graalvm.compiler.debug.DebugContext.Scope; |
| |
| /** |
| * Implements the filter specified by options such as {@link DebugOptions#Dump}, |
| * {@link DebugOptions#Log}, {@link DebugOptions#Count} and {@link DebugOptions#Time}. |
| * |
| * See <a href="DumpHelp.txt">here</a> for a description of the filter syntax. |
| * |
| * <p> |
| * These options enable the associated debug facility if their filter matches the |
| * {@linkplain Scope#getQualifiedName() name} of the current scope. For the |
| * {@link DebugOptions#Dump} and {@link DebugOptions#Log} options, the log or dump level is set. The |
| * {@link DebugOptions#Count} and {@link DebugOptions#Time} options don't have a level, for them |
| * {@code level = 0} means disabled and a {@code level > 0} means enabled. |
| * <p> |
| * The syntax for a filter is explained <a href="file:doc-files/DumpHelp.txt">here</a>. |
| */ |
| final class DebugFilter { |
| |
| public static DebugFilter parse(String spec) { |
| if (spec == null) { |
| return null; |
| } |
| return new DebugFilter(spec.split(",")); |
| } |
| |
| private final Term[] terms; |
| |
| private DebugFilter(String[] terms) { |
| if (terms.length == 0) { |
| this.terms = null; |
| } else { |
| this.terms = new Term[terms.length]; |
| for (int i = 0; i < terms.length; i++) { |
| String t = terms[i]; |
| int idx = t.indexOf(':'); |
| |
| String pattern; |
| int level; |
| if (idx < 0) { |
| if (t.startsWith("~")) { |
| pattern = t.substring(1); |
| level = 0; |
| } else { |
| pattern = t; |
| level = DebugContext.BASIC_LEVEL; |
| } |
| } else { |
| pattern = t.substring(0, idx); |
| if (idx + 1 < t.length()) { |
| String levelString = t.substring(idx + 1); |
| try { |
| level = Integer.parseInt(levelString); |
| } catch (NumberFormatException e) { |
| switch (levelString) { |
| case "basic": |
| level = DebugContext.BASIC_LEVEL; |
| break; |
| case "info": |
| level = DebugContext.INFO_LEVEL; |
| break; |
| case "verbose": |
| level = DebugContext.VERBOSE_LEVEL; |
| break; |
| default: |
| throw new IllegalArgumentException("Unknown dump level: \"" + levelString + "\" expected basic, info, verbose or an integer"); |
| } |
| } |
| |
| } else { |
| level = DebugContext.BASIC_LEVEL; |
| } |
| } |
| |
| this.terms[i] = new Term(pattern, level); |
| } |
| } |
| } |
| |
| /** |
| * Check whether a given input is matched by this filter, and determine the log level. |
| */ |
| public int matchLevel(String input) { |
| if (terms == null) { |
| return DebugContext.BASIC_LEVEL; |
| } else { |
| int defaultLevel = 0; |
| int level = -1; |
| for (Term t : terms) { |
| if (t.isMatchAny()) { |
| defaultLevel = t.level; |
| } else if (t.matches(input)) { |
| level = t.level; |
| } |
| } |
| return level == -1 ? defaultLevel : level; |
| } |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder buf = new StringBuilder("DebugFilter"); |
| if (terms != null) { |
| buf.append(Arrays.toString(terms)); |
| } else { |
| buf.append("[]"); |
| } |
| return buf.toString(); |
| } |
| |
| private static class Term { |
| |
| private final Pattern pattern; |
| public final int level; |
| |
| Term(String filter, int level) { |
| this.level = level; |
| if (filter.isEmpty() || filter.equals("*")) { |
| this.pattern = null; |
| } else if (filter.contains("*") || filter.contains("?")) { |
| this.pattern = Pattern.compile(MethodFilter.createGlobString(filter)); |
| } else { |
| this.pattern = Pattern.compile(".*" + MethodFilter.createGlobString(filter) + ".*"); |
| } |
| } |
| |
| /** |
| * Determines if a given input is matched by this filter. |
| */ |
| public boolean matches(String input) { |
| return pattern == null || pattern.matcher(input).matches(); |
| } |
| |
| public boolean isMatchAny() { |
| return pattern == null; |
| } |
| |
| @Override |
| public String toString() { |
| return (pattern == null ? ".*" : pattern.toString()) + ":" + level; |
| } |
| } |
| } |