| /* |
| * Copyright (c) 2018, 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. |
| */ |
| |
| /** |
| * @test |
| * @bug 8193717 |
| * @summary Check that code with a lot named imports can compile. |
| * @library /tools/lib |
| * @modules jdk.jdeps/com.sun.tools.classfile |
| * jdk.compiler/com.sun.tools.javac.api |
| * jdk.compiler/com.sun.tools.javac.main |
| * jdk.jdeps/com.sun.tools.javap |
| * @build toolbox.ToolBox toolbox.JavapTask |
| * @run main T8193717 |
| */ |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| import java.nio.file.Paths; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.Set; |
| |
| import javax.tools.ForwardingJavaFileManager; |
| import javax.tools.JavaCompiler; |
| import javax.tools.JavaFileManager; |
| import javax.tools.JavaFileObject; |
| import javax.tools.JavaFileObject.Kind; |
| import javax.tools.SimpleJavaFileObject; |
| import javax.tools.StandardJavaFileManager; |
| import javax.tools.StandardLocation; |
| import javax.tools.ToolProvider; |
| |
| import com.sun.tools.classfile.AccessFlags; |
| import com.sun.tools.classfile.Attribute; |
| import com.sun.tools.classfile.Attributes; |
| import com.sun.tools.classfile.ClassFile; |
| import com.sun.tools.classfile.ClassWriter; |
| import com.sun.tools.classfile.ConstantPool; |
| import com.sun.tools.classfile.ConstantPool.CONSTANT_Class_info; |
| import com.sun.tools.classfile.ConstantPool.CONSTANT_Utf8_info; |
| import com.sun.tools.classfile.ConstantPool.CPInfo; |
| import com.sun.tools.classfile.Field; |
| import com.sun.tools.classfile.Method; |
| |
| import toolbox.JavacTask; |
| import toolbox.ToolBox; |
| |
| public class T8193717 { |
| public static void main(String... args) throws IOException { |
| new T8193717().run(); |
| } |
| |
| private static final int CLASSES = 500000; |
| |
| private void run() throws IOException { |
| StringBuilder imports = new StringBuilder(); |
| StringBuilder use = new StringBuilder(); |
| |
| for (int c = 0; c < CLASSES; c++) { |
| String simpleName = getSimpleName(c); |
| String pack = "p"; |
| imports.append("import " + pack + "." + simpleName + ";\n"); |
| use.append(simpleName + " " + simpleName + ";\n"); |
| } |
| String source = imports.toString() + "public class T {\n" + use.toString() + "}"; |
| ToolBox tb = new ToolBox(); |
| JavaCompiler compiler = ToolProvider.getSystemJavaCompiler(); |
| |
| try (StandardJavaFileManager fm = compiler.getStandardFileManager(null, null, null)) { |
| fm.setLocationFromPaths(StandardLocation.CLASS_OUTPUT, List.of(Paths.get("."))); |
| new JavacTask(tb).sources(source) |
| .options("-XDshould-stop.at=ATTR") //the source is too big for a classfile |
| .fileManager(new TestJFM(fm)) |
| .run(); |
| } |
| } |
| |
| private static String getSimpleName(int c) { |
| return "T" + String.format("%0" + (int) Math.ceil(Math.log10(CLASSES)) + "d", c); |
| } |
| |
| private byte[] generateClassFile(String name) throws IOException { |
| ConstantPool cp = new ConstantPool(new CPInfo[] { |
| new CONSTANT_Utf8_info(""), //0 |
| new CONSTANT_Utf8_info(name.replace(".", "/")), //1 |
| new CONSTANT_Class_info(null, 1), //2 |
| new CONSTANT_Utf8_info("java/lang/Object"), //3 |
| new CONSTANT_Class_info(null, 3), //4 |
| }); |
| ClassFile cf = new ClassFile(0xCAFEBABE, |
| 0, |
| 51, |
| cp, |
| new AccessFlags(AccessFlags.ACC_ABSTRACT | |
| AccessFlags.ACC_INTERFACE | |
| AccessFlags.ACC_PUBLIC), |
| 2, |
| 4, |
| new int[0], |
| new Field[0], |
| new Method[0], |
| new Attributes(cp, new Attribute[0])); |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| new ClassWriter().write(cf, baos); |
| return baos.toByteArray(); |
| } |
| |
| final class TestJFM extends ForwardingJavaFileManager<JavaFileManager> { |
| |
| public TestJFM(JavaFileManager fileManager) { |
| super(fileManager); |
| } |
| |
| @Override |
| public Iterable<JavaFileObject> list(Location location, String packageName, |
| Set<Kind> kinds, boolean recurse) throws IOException { |
| if (location == StandardLocation.CLASS_PATH) { |
| if (packageName.equals("p")) { |
| try { |
| List<JavaFileObject> result = new ArrayList<>(CLASSES); |
| |
| for (int c = 0; c < CLASSES; c++) { |
| result.add(new TestJFO("p." + getSimpleName(c))); |
| } |
| |
| return result; |
| } catch (URISyntaxException ex) { |
| throw new IllegalStateException(ex); |
| } |
| } |
| } |
| return super.list(location, packageName, kinds, recurse); |
| } |
| |
| @Override |
| public String inferBinaryName(Location location, JavaFileObject file) { |
| if (file instanceof TestJFO) { |
| return ((TestJFO) file).name; |
| } |
| return super.inferBinaryName(location, file); |
| } |
| |
| private class TestJFO extends SimpleJavaFileObject { |
| |
| private final String name; |
| |
| public TestJFO(String name) throws URISyntaxException { |
| super(new URI("mem://" + name.replace(".", "/") + ".class"), Kind.CLASS); |
| this.name = name; |
| } |
| |
| @Override |
| public InputStream openInputStream() throws IOException { |
| return new ByteArrayInputStream(generateClassFile(name)); |
| } |
| } |
| |
| } |
| } |