| /* |
| * Copyright (c) 2015, 2017, 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 combo; |
| |
| import com.sun.source.tree.ClassTree; |
| import com.sun.source.tree.CompilationUnitTree; |
| import com.sun.source.util.JavacTask; |
| import com.sun.source.util.TaskEvent; |
| import com.sun.source.util.TaskEvent.Kind; |
| import com.sun.source.util.TaskListener; |
| import com.sun.source.util.TreeScanner; |
| import com.sun.tools.javac.api.MultiTaskListener; |
| import com.sun.tools.javac.code.Kinds; |
| import com.sun.tools.javac.code.Symbol; |
| import com.sun.tools.javac.code.Symtab; |
| import com.sun.tools.javac.code.Type; |
| import com.sun.tools.javac.code.Type.ClassType; |
| import com.sun.tools.javac.code.TypeTag; |
| import com.sun.tools.javac.code.Types; |
| import com.sun.tools.javac.comp.Annotate; |
| import com.sun.tools.javac.comp.Check; |
| import com.sun.tools.javac.comp.CompileStates; |
| import com.sun.tools.javac.comp.Enter; |
| import com.sun.tools.javac.comp.Modules; |
| import com.sun.tools.javac.main.Arguments; |
| import com.sun.tools.javac.main.JavaCompiler; |
| import com.sun.tools.javac.tree.JCTree.JCClassDecl; |
| import com.sun.tools.javac.util.Context; |
| import com.sun.tools.javac.util.Log; |
| |
| import javax.tools.Diagnostic; |
| import javax.tools.DiagnosticListener; |
| import javax.tools.JavaFileManager; |
| import javax.tools.JavaFileObject; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| /** |
| * A reusable context is a context that can be used safely across multiple compilation rounds |
| * arising from execution of a combo test. It achieves reuse by replacing some components |
| * (most notably JavaCompiler and Log) with reusable counterparts, and by exposing a method |
| * to cleanup leftovers from previous compilation. |
| * <p> |
| * There are, however, situations in which reusing the context is not safe: (i) when different |
| * compilations are using different sets of compiler options (as most option values are cached |
| * inside components themselves) and (ii) when the compilation unit happens to redefine classes |
| * in the java.* packages. |
| */ |
| class ReusableContext extends Context implements TaskListener { |
| |
| Set<CompilationUnitTree> roots = new HashSet<>(); |
| |
| String opts; |
| boolean polluted = false; |
| |
| ReusableContext() { |
| super(); |
| put(Log.logKey, ReusableLog.factory); |
| put(JavaCompiler.compilerKey, ReusableJavaCompiler.factory); |
| } |
| |
| void clear() { |
| drop(Arguments.argsKey); |
| drop(DiagnosticListener.class); |
| drop(Log.outKey); |
| drop(Log.errKey); |
| drop(JavaFileManager.class); |
| drop(JavacTask.class); |
| |
| if (ht.get(Log.logKey) instanceof ReusableLog) { |
| //log already inited - not first round |
| ((ReusableLog)Log.instance(this)).clear(); |
| Enter.instance(this).newRound(); |
| ((ReusableJavaCompiler)ReusableJavaCompiler.instance(this)).clear(); |
| Types.instance(this).newRound(); |
| Check.instance(this).newRound(); |
| Modules.instance(this).newRound(); |
| Annotate.instance(this).newRound(); |
| CompileStates.instance(this).clear(); |
| MultiTaskListener.instance(this).clear(); |
| |
| //find if any of the roots have redefined java.* classes |
| Symtab syms = Symtab.instance(this); |
| pollutionScanner.scan(roots, syms); |
| roots.clear(); |
| } |
| } |
| |
| /** |
| * This scanner detects as to whether the shared context has been polluted. This happens |
| * whenever a compiled program redefines a core class (in 'java.*' package) or when |
| * (typically because of cyclic inheritance) the symbol kind of a core class has been touched. |
| */ |
| TreeScanner<Void, Symtab> pollutionScanner = new TreeScanner<Void, Symtab>() { |
| @Override |
| public Void visitClass(ClassTree node, Symtab syms) { |
| Symbol sym = ((JCClassDecl)node).sym; |
| if (sym != null) { |
| syms.removeClass(sym.packge().modle, sym.flatName()); |
| Type sup = supertype(sym); |
| if (isCoreClass(sym) || |
| (sup != null && isCoreClass(sup.tsym) && sup.tsym.kind != Kinds.Kind.TYP)) { |
| polluted = true; |
| } |
| } |
| return super.visitClass(node, syms); |
| } |
| |
| private boolean isCoreClass(Symbol s) { |
| return s.flatName().toString().startsWith("java."); |
| } |
| |
| private Type supertype(Symbol s) { |
| if (s.type == null || |
| !s.type.hasTag(TypeTag.CLASS)) { |
| return null; |
| } else { |
| ClassType ct = (ClassType)s.type; |
| return ct.supertype_field; |
| } |
| } |
| }; |
| |
| @Override |
| public void finished(TaskEvent e) { |
| if (e.getKind() == Kind.PARSE) { |
| roots.add(e.getCompilationUnit()); |
| } |
| } |
| |
| @Override |
| public void started(TaskEvent e) { |
| //do nothing |
| } |
| |
| <T> void drop(Key<T> k) { |
| ht.remove(k); |
| } |
| |
| <T> void drop(Class<T> c) { |
| ht.remove(key(c)); |
| } |
| |
| /** |
| * Reusable JavaCompiler; exposes a method to clean up the component from leftovers associated with |
| * previous compilations. |
| */ |
| static class ReusableJavaCompiler extends JavaCompiler { |
| |
| static Factory<JavaCompiler> factory = ReusableJavaCompiler::new; |
| |
| ReusableJavaCompiler(Context context) { |
| super(context); |
| } |
| |
| @Override |
| public void close() { |
| //do nothing |
| } |
| |
| void clear() { |
| newRound(); |
| } |
| |
| @Override |
| protected void checkReusable() { |
| //do nothing - it's ok to reuse the compiler |
| } |
| } |
| |
| /** |
| * Reusable Log; exposes a method to clean up the component from leftovers associated with |
| * previous compilations. |
| */ |
| static class ReusableLog extends Log { |
| |
| static Factory<Log> factory = ReusableLog::new; |
| |
| Context context; |
| |
| ReusableLog(Context context) { |
| super(context); |
| this.context = context; |
| } |
| |
| void clear() { |
| recorded.clear(); |
| sourceMap.clear(); |
| nerrors = 0; |
| nwarnings = 0; |
| //Set a fake listener that will lazily lookup the context for the 'real' listener. Since |
| //this field is never updated when a new task is created, we cannot simply reset the field |
| //or keep old value. This is a hack to workaround the limitations in the current infrastructure. |
| diagListener = new DiagnosticListener<JavaFileObject>() { |
| DiagnosticListener<JavaFileObject> cachedListener; |
| |
| @Override |
| @SuppressWarnings("unchecked") |
| public void report(Diagnostic<? extends JavaFileObject> diagnostic) { |
| if (cachedListener == null) { |
| cachedListener = context.get(DiagnosticListener.class); |
| } |
| cachedListener.report(diagnostic); |
| } |
| }; |
| } |
| } |
| } |