1 /*
2  * Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.
3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4  *
5  * This code is free software; you can redistribute it and/or modify it
6  * under the terms of the GNU General Public License version 2 only, as
7  * published by the Free Software Foundation.
8  *
9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
16  * 2 along with this work; if not, write to the Free Software Foundation,
17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
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22  */
23 
24 package jdk.tools.jaotc;
25 
26 import java.util.HashSet;
27 import java.util.Iterator;
28 import java.util.regex.Pattern;
29 
30 import jdk.vm.ci.meta.ResolvedJavaMethod;
31 
32 /**
33  * A class encapsulating any user-specified compilation restrictions.
34  */
35 final class CompilationSpec {
36 
37     /**
38      * Set of method names to restrict compilation to.
39      */
40     private HashSet<String> compileOnlyStrings = new HashSet<>();
41     private HashSet<Pattern> compileOnlyPatterns = new HashSet<>();
42 
43     /**
44      * Set of method names that should be excluded from compilation.
45      */
46     private HashSet<String> excludeStrings = new HashSet<>();
47     private HashSet<Pattern> excludePatterns = new HashSet<>();
48 
49     /**
50      * Add a {@code compileOnly} directive to the compile-only list.
51      *
52      * @param pattern regex or non-regex pattern string
53      */
addCompileOnlyPattern(String pattern)54     void addCompileOnlyPattern(String pattern) {
55         if (pattern.contains("*")) {
56             compileOnlyPatterns.add(Pattern.compile(pattern));
57         } else {
58             compileOnlyStrings.add(pattern);
59         }
60     }
61 
62     /**
63      * Add an {@code exclude} directive to the exclude list.
64      *
65      * @param pattern regex or non-regex pattern string
66      */
addExcludePattern(String pattern)67     void addExcludePattern(String pattern) {
68         if (pattern.contains("*")) {
69             excludePatterns.add(Pattern.compile(pattern));
70         } else {
71             excludeStrings.add(pattern);
72         }
73     }
74 
75     /**
76      * Check if a given method is part of a restrictive compilation.
77      *
78      * @param method method to be checked
79      * @return true or false
80      */
shouldCompileMethod(ResolvedJavaMethod method)81     boolean shouldCompileMethod(ResolvedJavaMethod method) {
82         if (compileWithRestrictions()) {
83             // If there are user-specified compileOnly patterns, default action
84             // is not to compile the method.
85             boolean compileMethod = compileOnlyStrings.isEmpty() && compileOnlyPatterns.isEmpty();
86 
87             // Check if the method matches with any of the specified compileOnly patterns.
88             String methodName = JavaMethodInfo.uniqueMethodName(method);
89 
90             // compileOnly
91             if (!compileMethod) {
92                 compileMethod = compileOnlyStrings.contains(methodName);
93             }
94             if (!compileMethod) {
95                 Iterator<Pattern> it = compileOnlyPatterns.iterator();
96                 while (!compileMethod && it.hasNext()) {
97                     Pattern pattern = it.next();
98                     compileMethod = pattern.matcher(methodName).matches();
99                 }
100             }
101 
102             // exclude
103             if (compileMethod) {
104                 compileMethod = !excludeStrings.contains(methodName);
105             }
106             if (compileMethod) {
107                 Iterator<Pattern> it = excludePatterns.iterator();
108                 while (compileMethod && it.hasNext()) {
109                     Pattern pattern = it.next();
110                     compileMethod = !(pattern.matcher(methodName).matches());
111                 }
112             }
113             return compileMethod;
114         }
115         return true;
116     }
117 
118     /**
119      * Return true if compilation restrictions are specified.
120      */
compileWithRestrictions()121     private boolean compileWithRestrictions() {
122         return !(compileOnlyStrings.isEmpty() && compileOnlyPatterns.isEmpty() && excludeStrings.isEmpty() && excludePatterns.isEmpty());
123     }
124 
125 }
126