388 lines
14 KiB
Java
388 lines
14 KiB
Java
/*
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* Copyright (c) 2010, 2015, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 7004029 8131915
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* @summary Basher for star-import scopes
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* @modules jdk.compiler/com.sun.tools.javac.code
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* jdk.compiler/com.sun.tools.javac.file
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* jdk.compiler/com.sun.tools.javac.tree
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* jdk.compiler/com.sun.tools.javac.util
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*/
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import java.util.*;
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import java.util.List;
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import com.sun.tools.javac.code.*;
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import com.sun.tools.javac.code.Scope.ImportFilter;
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import com.sun.tools.javac.code.Scope.StarImportScope;
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import com.sun.tools.javac.code.Scope.WriteableScope;
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import com.sun.tools.javac.code.Symbol.*;
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import com.sun.tools.javac.file.JavacFileManager;
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import com.sun.tools.javac.tree.TreeMaker;
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import com.sun.tools.javac.util.*;
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import static com.sun.tools.javac.code.Kinds.Kind.*;
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public class StarImportTest {
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public static void main(String... args) throws Exception {
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new StarImportTest().run(args);
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}
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void run(String... args) throws Exception {
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int count = 1;
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for (int i = 0; i < args.length; i++) {
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String arg = args[i];
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if (arg.equals("-seed") && (i + 1 < args.length))
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seed = Long.parseLong(args[++i]);
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else if(arg.equals("-tests") && (i + 1 < args.length))
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count = Integer.parseInt(args[++i]);
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else
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throw new Exception("unknown arg: " + arg);
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}
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rgen = new Random(seed);
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for (int i = 0; i < count; i++) {
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Test t = new Test();
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t.run();
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}
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if (errors > 0)
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throw new Exception(errors + " errors found");
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}
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/**
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* Select a random element from an array of choices.
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*/
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<T> T random(T... choices) {
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return choices[rgen.nextInt(choices.length)];
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}
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/**
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* Write a message to stderr.
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*/
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void log(String msg) {
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System.err.println(msg);
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}
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/**
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* Write a message to stderr, and dump a scope.
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*/
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void log(String msg, Scope s) {
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System.err.print(msg);
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System.err.print(": ");
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String sep = "(";
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for (Symbol sym : s.getSymbols()) {
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System.err.print(sep + sym.name + ":" + sym);
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sep = ",";
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}
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System.err.println();
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}
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/**
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* Write an error message to stderr.
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*/
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void error(String msg) {
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System.err.println("Error: " + msg);
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errors++;
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}
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Random rgen;
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long seed = 0;
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int errors;
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enum SetupKind { NAMES, PACKAGE, CLASS };
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static final int MAX_SETUP_COUNT = 50;
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static final int MAX_SETUP_NAME_COUNT = 20;
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static final int MAX_SETUP_PACKAGE_COUNT = 20;
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static final int MAX_SETUP_CLASS_COUNT = 20;
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/** Class to encapsulate a test run. */
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class Test {
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/** Run the test. */
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void run() throws Exception {
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log ("starting test");
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setup();
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createStarImportScope();
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test();
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}
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/**
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* Setup env by creating pseudo-random collection of names, packages and classes.
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*/
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void setup() {
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log ("setup");
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context = new Context();
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JavacFileManager.preRegister(context); // required by ClassReader which is required by Symtab
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make = TreeMaker.instance(context);
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names = Names.instance(context); // Name.Table impls tied to an instance of Names
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symtab = Symtab.instance(context);
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types = Types.instance(context);
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int setupCount = rgen.nextInt(MAX_SETUP_COUNT);
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for (int i = 0; i < setupCount; i++) {
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switch (random(SetupKind.values())) {
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case NAMES:
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setupNames();
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break;
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case PACKAGE:
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setupPackage();
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break;
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case CLASS:
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setupClass();
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break;
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}
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}
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}
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/**
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* Set up a random number of names.
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*/
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void setupNames() {
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int count = rgen.nextInt(MAX_SETUP_NAME_COUNT);
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log("setup: creating " + count + " new names");
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for (int i = 0; i < count; i++) {
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names.fromString("n" + (++nextNameSerial));
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}
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}
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/**
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* Set up a package containing a random number of member elements.
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*/
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void setupPackage() {
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Name name = names.fromString("p" + (++nextPackageSerial));
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int count = rgen.nextInt(MAX_SETUP_PACKAGE_COUNT);
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log("setup: creating package " + name + " with " + count + " entries");
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PackageSymbol p = new PackageSymbol(name, symtab.rootPackage);
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p.members_field = WriteableScope.create(p);
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for (int i = 0; i < count; i++) {
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String outer = name + "c" + i;
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String suffix = random(null, "$Entry", "$Entry2");
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ClassSymbol c1 = createClass(names.fromString(outer), p);
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// log("setup: created " + c1);
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if (suffix != null) {
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ClassSymbol c2 = createClass(names.fromString(outer + suffix), p);
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// log("setup: created " + c2);
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}
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}
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// log("package " + p, p.members_field);
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packages.add(p);
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imports.add(p);
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}
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/**
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* Set up a class containing a random number of member elements.
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*/
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void setupClass() {
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Name name = names.fromString("c" + (++nextClassSerial));
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int count = rgen.nextInt(MAX_SETUP_CLASS_COUNT);
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log("setup: creating class " + name + " with " + count + " entries");
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ClassSymbol c = createClass(name, symtab.unnamedModule.unnamedPackage);
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// log("setup: created " + c);
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for (int i = 0; i < count; i++) {
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ClassSymbol ic = createClass(names.fromString("Entry" + i), c);
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// log("setup: created " + ic);
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}
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classes.add(c);
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imports.add(c);
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}
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/**
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* Create a star-import scope and a model thereof, from the packages and
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* classes created by setupPackages and setupClasses.
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* @throws Exception for fatal errors, such as from reflection
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*/
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void createStarImportScope() throws Exception {
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log ("createStarImportScope");
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PackageSymbol pkg = new PackageSymbol(names.fromString("pkg"), symtab.rootPackage);
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starImportScope = new StarImportScope(pkg);
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starImportModel = new Model();
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for (Symbol imp: imports) {
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Scope members = imp.members();
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// log("importAll", members);
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starImportScope.importAll(types, members, new ImportFilter() {
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@Override
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public boolean accepts(Scope origin, Symbol t) {
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return t.kind == TYP;
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}
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}, make.Import(null, false), (i, cf) -> { throw new IllegalStateException(); });
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for (Symbol sym : members.getSymbols()) {
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starImportModel.enter(sym);
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}
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}
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// log("star-import scope", starImportScope);
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starImportModel.check(starImportScope);
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}
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/**
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* The core of the test. In a random order, move nested classes from
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* the package in which they created to the class which should own them.
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*/
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void test() {
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log ("test");
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List<ClassSymbol> nestedClasses = new LinkedList<ClassSymbol>();
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for (PackageSymbol p: packages) {
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for (Symbol sym : p.members_field.getSymbols()) {
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if (sym.name.toString().contains("$"))
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nestedClasses.add((ClassSymbol) sym);
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}
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}
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for (int i = nestedClasses.size(); i > 0; i--) {
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// select a random nested class to move from package to class
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ClassSymbol sym = nestedClasses.remove(rgen.nextInt(i));
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log("adjusting class " + sym);
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// remove from star import model
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starImportModel.remove(sym);
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String s = sym.name.toString();
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int dollar = s.indexOf("$");
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// owner should be a package
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assert (sym.owner.kind == PCK);
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// determine new owner
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Name outerName = names.fromString(s.substring(0, dollar));
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// log(sym + " owner: " + sym.owner, sym.owner.members());
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ClassSymbol outer = (ClassSymbol)sym.owner.members().findFirst(outerName);
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// log("outer: " + outerName + " " + outer);
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// remove from package
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sym.owner.members().remove(sym);
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// rename and insert into class
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sym.name = names.fromString(s.substring(dollar + 1));
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outer.members().enter(sym);
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sym.owner = outer;
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// verify
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starImportModel.check(starImportScope);
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}
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}
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ClassSymbol createClass(Name name, Symbol owner) {
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ClassSymbol sym = new ClassSymbol(0, name, owner);
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sym.members_field = WriteableScope.create(sym);
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if (owner != symtab.unnamedModule.unnamedPackage)
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owner.members().enter(sym);
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return sym;
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}
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Context context;
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Symtab symtab;
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TreeMaker make;
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Names names;
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Types types;
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int nextNameSerial;
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List<PackageSymbol> packages = new ArrayList<PackageSymbol>();
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int nextPackageSerial;
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List<ClassSymbol> classes = new ArrayList<ClassSymbol>();
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List<Symbol> imports = new ArrayList<Symbol>();
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int nextClassSerial;
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StarImportScope starImportScope;
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Model starImportModel;
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}
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class Model {
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private Map<Name, Set<Symbol>> map = new HashMap<Name, Set<Symbol>>();
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private Set<Symbol> bogus = new HashSet<Symbol>();
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void enter(Symbol sym) {
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Set<Symbol> syms = map.get(sym.name);
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if (syms == null)
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map.put(sym.name, syms = new LinkedHashSet<Symbol>());
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syms.add(sym);
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}
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void remove(Symbol sym) {
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Set<Symbol> syms = map.get(sym.name);
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if (syms == null)
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error("no entries for " + sym.name + " found in reference model");
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else {
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boolean ok = syms.remove(sym);
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if (ok) {
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// log(sym.name + "(" + sym + ") removed from reference model");
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} else {
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error(sym.name + " not found in reference model");
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}
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if (syms.isEmpty())
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map.remove(sym.name);
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}
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}
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/**
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* Check the contents of a scope
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*/
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void check(Scope scope) {
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// First, check all entries in scope are in map
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int bogusCount = 0;
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for (Symbol sym : scope.getSymbols()) {
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if (sym.owner != scope.getOrigin(sym).owner) {
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if (bogus.contains(sym)) {
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bogusCount++;
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} else {
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log("Warning: " + sym.name + ":" + sym + " appears to be bogus");
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bogus.add(sym);
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}
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} else {
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Set<Symbol> syms = map.get(sym.name);
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if (syms == null) {
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error("check: no entries found for " + sym.name + ":" + sym + " in reference map");
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} else if (!syms.contains(sym)) {
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error("check: symbol " + sym.name + ":" + sym + " not found in reference map");
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}
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}
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}
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if (bogusCount > 0) {
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log("Warning: " + bogusCount + " other bogus entries previously reported");
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}
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// Second, check all entries in map are in scope
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for (Map.Entry<Name,Set<Symbol>> me: map.entrySet()) {
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Name name = me.getKey();
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if (scope.findFirst(name) == null) {
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error("check: no entries found for " + name + " in scope");
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continue;
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}
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nextSym:
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for (Symbol sym: me.getValue()) {
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for (Symbol s : scope.getSymbolsByName(name)) {
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if (sym == s)
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continue nextSym;
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}
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error("check: symbol " + sym + " not found in scope");
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}
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}
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}
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}
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}
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