--- a/langtools/test/tools/javac/MethodParameters.java Wed Jul 05 18:43:54 2017 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,344 +0,0 @@
-/*
- * Copyright (c) 2012, 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 8004727
- * @summary javac should generate method parameters correctly.
- */
-// key: opt.arg.parameters
-import com.sun.tools.classfile.*;
-import com.sun.tools.javac.file.JavacFileManager;
-import com.sun.tools.javac.main.Main;
-import com.sun.tools.javac.util.Context;
-import com.sun.tools.javac.util.Name;
-import com.sun.tools.javac.util.Names;
-import java.io.*;
-import javax.lang.model.element.*;
-import java.util.*;
-
-public class MethodParameters {
-
- static final String Foo_name = "Foo";
- static final String Foo_contents =
- "public class Foo {\n" +
- " Foo() {}\n" +
- " void foo0() {}\n" +
- " void foo2(int j, int k) {}\n" +
- "}";
- static final String Bar_name = "Bar";
- static final String Bar_contents =
- "public class Bar {\n" +
- " Bar(int i) {}" +
- " Foo foo() { return new Foo(); }\n" +
- "}";
- static final String Baz_name = "Baz";
- static final String Baz_contents =
- "public class Baz {\n" +
- " int baz;" +
- " Baz(int i) {}" +
- "}";
- static final String Qux_name = "Qux";
- static final String Qux_contents =
- "public class Qux extends Baz {\n" +
- " Qux(int i) { super(i); }" +
- "}";
- static final File classesdir = new File("methodparameters");
-
- public static void main(String... args) throws Exception {
- new MethodParameters().run();
- }
-
- void run() throws Exception {
- classesdir.mkdir();
- final File Foo_java =
- writeFile(classesdir, Foo_name + ".java", Foo_contents);
- final File Bar_java =
- writeFile(classesdir, Bar_name + ".java", Bar_contents);
- final File Baz_java =
- writeFile(classesdir, Baz_name + ".java", Baz_contents);
- System.err.println("Test compile with -parameter");
- compile("-parameters", "-d", classesdir.getPath(), Foo_java.getPath());
- // First test: make sure javac doesn't choke to death on
- // MethodParameter attributes
- System.err.println("Test compile with classfile containing MethodParameter attributes");
- compile("-parameters", "-d", classesdir.getPath(),
- "-cp", classesdir.getPath(), Bar_java.getPath());
- System.err.println("Examine class foo");
- checkFoo();
- checkBar();
- System.err.println("Test debug information conflict");
- compile("-g", "-parameters", "-d", classesdir.getPath(),
- "-cp", classesdir.getPath(), Baz_java.getPath());
- System.err.println("Introducing debug information conflict");
- Baz_java.delete();
- modifyBaz(false);
- System.err.println("Checking language model");
- inspectBaz();
- System.err.println("Permuting attributes");
- modifyBaz(true);
- System.err.println("Checking language model");
- inspectBaz();
-
- if(0 != errors)
- throw new Exception("MethodParameters test failed with " +
- errors + " errors");
- }
-
- void inspectBaz() throws Exception {
- final File Qux_java =
- writeFile(classesdir, Qux_name + ".java", Qux_contents);
- final String[] args = { "-XDsave-parameter-names", "-d",
- classesdir.getPath(),
- "-cp", classesdir.getPath(),
- Qux_java.getPath() };
- final StringWriter sw = new StringWriter();
- final PrintWriter pw = new PrintWriter(sw);
-
- // We need to be able to crack open javac and look at its data
- // structures. We'll rig up a compiler instance, but keep its
- // Context, thus allowing us to get at the ClassReader.
- Context context = new Context();
- Main comp = new Main("javac", pw);
- JavacFileManager.preRegister(context);
-
- // Compile Qux, which uses Baz.
- comp.compile(args, context);
- pw.close();
- final String out = sw.toString();
- if (out.length() > 0)
- System.err.println(out);
-
- // Now get the class reader, construct a name for Baz, and load it.
- com.sun.tools.javac.jvm.ClassReader cr =
- com.sun.tools.javac.jvm.ClassReader.instance(context);
- Name name = Names.instance(context).fromString(Baz_name);
-
- // Now walk down the language model and check the name of the
- // parameter.
- final Element baz = cr.loadClass(name);
- for (Element e : baz.getEnclosedElements()) {
- if (e instanceof ExecutableElement) {
- final ExecutableElement ee = (ExecutableElement) e;
- final List<? extends VariableElement> params =
- ee.getParameters();
- if (1 != params.size())
- throw new Exception("Classfile Baz badly formed: wrong number of methods");
- final VariableElement param = params.get(0);
- if (!param.getSimpleName().contentEquals("baz")) {
- errors++;
- System.err.println("javac did not correctly resolve the metadata conflict, parameter's name reads as " + param.getSimpleName());
- } else
- System.err.println("javac did correctly resolve the metadata conflict");
- }
- }
- }
-
- void modifyBaz(boolean flip) throws Exception {
- final File Baz_class = new File(classesdir, Baz_name + ".class");
- final ClassFile baz = ClassFile.read(Baz_class);
- final int ind = baz.constant_pool.getUTF8Index("baz");
- MethodParameters_attribute mpattr = null;
- int mpind = 0;
- Code_attribute cattr = null;
- int cind = 0;
-
- // Find the indexes of the MethodParameters and the Code attributes
- if (baz.methods.length != 1)
- throw new Exception("Classfile Baz badly formed: wrong number of methods");
- if (!baz.methods[0].getName(baz.constant_pool).equals("<init>"))
- throw new Exception("Classfile Baz badly formed: method has name " +
- baz.methods[0].getName(baz.constant_pool));
- for (int i = 0; i < baz.methods[0].attributes.attrs.length; i++) {
- if (baz.methods[0].attributes.attrs[i] instanceof
- MethodParameters_attribute) {
- mpattr = (MethodParameters_attribute)
- baz.methods[0].attributes.attrs[i];
- mpind = i;
- } else if (baz.methods[0].attributes.attrs[i] instanceof
- Code_attribute) {
- cattr = (Code_attribute) baz.methods[0].attributes.attrs[i];
- cind = i;
- }
- }
- if (null == mpattr)
- throw new Exception("Classfile Baz badly formed: no method parameters info");
- if (null == cattr)
- throw new Exception("Classfile Baz badly formed: no local variable table");
-
- int flags = mpattr.method_parameter_table[0].flags;
-
- // Alter the MethodParameters attribute, changing the name of
- // the parameter from i to baz. This requires Black Magic...
- //
- // The (well-designed) classfile library (correctly) does not
- // allow us to mess around with the attribute data structures,
- // or arbitrarily generate new ones.
- //
- // Instead, we install a new subclass of Attribute that
- // hijacks the Visitor pattern and outputs the sequence of
- // bytes that we want. This only works in this particular
- // instance, because we know we'll only every see one kind of
- // visitor.
- //
- // If anyone ever changes the makeup of the Baz class, or
- // tries to install some kind of visitor that gets run prior
- // to serialization, this will break.
- baz.methods[0].attributes.attrs[mpind] =
- new Attribute(mpattr.attribute_name_index,
- mpattr.attribute_length) {
- public <R, D> R accept(Visitor<R, D> visitor, D data) {
- if (data instanceof ByteArrayOutputStream) {
- ByteArrayOutputStream out =
- (ByteArrayOutputStream) data;
- out.write(1);
- out.write((ind >> 8) & 0xff);
- out.write(ind & 0xff);
- out.write((flags >> 24) & 0xff);
- out.write((flags >> 16) & 0xff);
- out.write((flags >> 8) & 0xff);
- out.write(flags & 0xff);
- } else
- throw new RuntimeException("Output stream is of type " + data.getClass() + ", which is not handled by this test. Update the test and it should work.");
- return null;
- }
- };
-
- // Flip the code and method attributes. This is for checking
- // that order doesn't matter.
- if (flip) {
- baz.methods[0].attributes.attrs[mpind] = cattr;
- baz.methods[0].attributes.attrs[cind] = mpattr;
- }
-
- new ClassWriter().write(baz, Baz_class);
- }
-
- // Run a bunch of structural tests on foo to make sure it looks right.
- void checkFoo() throws Exception {
- final File Foo_class = new File(classesdir, Foo_name + ".class");
- final ClassFile foo = ClassFile.read(Foo_class);
- for (int i = 0; i < foo.methods.length; i++) {
- System.err.println("Examine method Foo." + foo.methods[i].getName(foo.constant_pool));
- if (foo.methods[i].getName(foo.constant_pool).equals("foo2")) {
- for (int j = 0; j < foo.methods[i].attributes.attrs.length; j++)
- if (foo.methods[i].attributes.attrs[j] instanceof
- MethodParameters_attribute) {
- MethodParameters_attribute mp =
- (MethodParameters_attribute)
- foo.methods[i].attributes.attrs[j];
- System.err.println("Foo.foo2 should have 2 parameters: j and k");
- if (2 != mp.method_parameter_table_length)
- error("expected 2 method parameter entries in foo2, got " +
- mp.method_parameter_table_length);
- else if (!foo.constant_pool.getUTF8Value(mp.method_parameter_table[0].name_index).equals("j"))
- error("expected first parameter to foo2 to be \"j\", got \"" +
- foo.constant_pool.getUTF8Value(mp.method_parameter_table[0].name_index) +
- "\" instead");
- else if (!foo.constant_pool.getUTF8Value(mp.method_parameter_table[1].name_index).equals("k"))
- error("expected first parameter to foo2 to be \"k\", got \"" +
- foo.constant_pool.getUTF8Value(mp.method_parameter_table[1].name_index) +
- "\" instead");
- }
- }
- else if (foo.methods[i].getName(foo.constant_pool).equals("<init>")) {
- for (int j = 0; j < foo.methods[i].attributes.attrs.length; j++) {
- if (foo.methods[i].attributes.attrs[j] instanceof
- MethodParameters_attribute)
- error("Zero-argument constructor shouldn't have MethodParameters");
- }
- }
- else if (foo.methods[i].getName(foo.constant_pool).equals("foo0")) {
- for (int j = 0; j < foo.methods[i].attributes.attrs.length; j++)
- if (foo.methods[i].attributes.attrs[j] instanceof
- MethodParameters_attribute)
- error("Zero-argument method shouldn't have MethodParameters");
- }
- else
- error("Unknown method " + foo.methods[i].getName(foo.constant_pool) + " showed up in class Foo");
- }
- }
-
- // Run a bunch of structural tests on Bar to make sure it looks right.
- void checkBar() throws Exception {
- final File Bar_class = new File(classesdir, Bar_name + ".class");
- final ClassFile bar = ClassFile.read(Bar_class);
- for (int i = 0; i < bar.methods.length; i++) {
- System.err.println("Examine method Bar." + bar.methods[i].getName(bar.constant_pool));
- if (bar.methods[i].getName(bar.constant_pool).equals("<init>")) {
- for (int j = 0; j < bar.methods[i].attributes.attrs.length; j++)
- if (bar.methods[i].attributes.attrs[j] instanceof
- MethodParameters_attribute) {
- MethodParameters_attribute mp =
- (MethodParameters_attribute)
- bar.methods[i].attributes.attrs[j];
- System.err.println("Bar constructor should have 1 parameter: i");
- if (1 != mp.method_parameter_table_length)
- error("expected 1 method parameter entries in constructor, got " +
- mp.method_parameter_table_length);
- else if (!bar.constant_pool.getUTF8Value(mp.method_parameter_table[0].name_index).equals("i"))
- error("expected first parameter to foo2 to be \"i\", got \"" +
- bar.constant_pool.getUTF8Value(mp.method_parameter_table[0].name_index) +
- "\" instead");
- }
- }
- else if (bar.methods[i].getName(bar.constant_pool).equals("foo")) {
- for (int j = 0; j < bar.methods[i].attributes.attrs.length; j++) {
- if (bar.methods[i].attributes.attrs[j] instanceof
- MethodParameters_attribute)
- error("Zero-argument constructor shouldn't have MethodParameters");
- }
- }
- }
- }
-
- String compile(String... args) throws Exception {
- System.err.println("compile: " + Arrays.asList(args));
- StringWriter sw = new StringWriter();
- PrintWriter pw = new PrintWriter(sw);
- int rc = com.sun.tools.javac.Main.compile(args, pw);
- pw.close();
- String out = sw.toString();
- if (out.length() > 0)
- System.err.println(out);
- if (rc != 0)
- error("compilation failed, rc=" + rc);
- return out;
- }
-
- File writeFile(File dir, String path, String body) throws IOException {
- File f = new File(dir, path);
- f.getParentFile().mkdirs();
- FileWriter out = new FileWriter(f);
- out.write(body);
- out.close();
- return f;
- }
-
- void error(String msg) {
- System.err.println("Error: " + msg);
- errors++;
- }
-
- int errors;
-}