/*
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* 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
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* questions.
*/
/*
* @test
* @bug 8011805
* @summary Update sun.tools.java class file reading/writing support to include the new constant pool entries (including invokedynamic)
*/
import java.io.DataInputStream;
import java.io.EOFException;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import sun.tools.java.ClassDeclaration;
import sun.tools.java.Identifier;
import sun.rmi.rmic.BatchEnvironment;
public class CFCTest {
/* Constant table */
private static final int CONSTANT_UTF8 = 1;
private static final int CONSTANT_INTEGER = 3;
private static final int CONSTANT_FLOAT = 4;
private static final int CONSTANT_LONG = 5;
private static final int CONSTANT_DOUBLE = 6;
private static final int CONSTANT_CLASS = 7;
private static final int CONSTANT_STRING = 8;
private static final int CONSTANT_FIELD = 9;
private static final int CONSTANT_METHOD = 10;
private static final int CONSTANT_INTERFACEMETHOD = 11;
private static final int CONSTANT_NAMEANDTYPE = 12;
private static final int CONSTANT_METHODHANDLE = 15;
private static final int CONSTANT_METHODTYPE = 16;
private static final int CONSTANT_INVOKEDYNAMIC = 18;
String testClassName = this.getClass().getCanonicalName();
String testClassPath = System.getProperty("test.classes", ".");
interface I {
int get();
}
public static void main(String[] args) throws Exception {
new CFCTest().testNewConstants();
}
void testNewConstants() throws Exception {
// Presence of lambda causes new constant pool constant types to be used
I lam = () -> 88;
if (lam.get() == 88) {
System.out.println("Sanity passed: Lambda worked.");
} else {
throw new RuntimeException("Sanity failed: bad lambda execution");
}
// Verify that all the new constant pool constant types are present
String clsName = testClassPath + File.separator + testClassName + ".class";
ClassConstantChecker ccc = new ClassConstantChecker(clsName);
ccc.checkFound(CONSTANT_METHODHANDLE);
ccc.checkFound(CONSTANT_METHODTYPE);
ccc.checkFound(CONSTANT_INVOKEDYNAMIC);
// Heart of test: read the class file with the new constant types
exerciseClassDefinition();
System.out.println("ClassDefinition read without failure.\n");
}
/**
* Failure is seen when getClassDefinition causes class read
*/
void exerciseClassDefinition() throws Exception {
BatchEnvironment env = new BatchEnvironment(System.out,
BatchEnvironment.createClassPath(testClassPath, null, null),
null);
try {
ClassDeclaration decl = env.getClassDeclaration(
Identifier.lookup(testClassName));
decl.getClassDefinition(env);
} finally {
env.flushErrors();
env.shutdown();
}
}
private class ClassConstantChecker {
private DataInputStream in;
private boolean[] found;
ClassConstantChecker(String clsName) throws IOException {
in = new DataInputStream(new FileInputStream(clsName));
found = new boolean[CONSTANT_INVOKEDYNAMIC + 20];
try {
check();
} finally {
in.close();
}
}
void checkFound(int tag) throws Exception {
if (found[tag]) {
System.out.printf("Constant pool tag found: %d\n", tag);
} else {
throw new RuntimeException("Insufficient test, constant pool tag NOT found: " + tag);
}
}
private void skip(int n) throws IOException {
if (in.skipBytes(n) != n) {
throw new EOFException();
}
}
private void check() throws IOException {
skip(8); // magic, version
int count = in.readUnsignedShort();
for (int i = 1; i < count; i++) {
int j = i;
// JVM 4.4 cp_info.tag
int tag = in.readByte();
found[tag] = true;
switch (tag) {
case CONSTANT_UTF8:
in.readUTF();
break;
case CONSTANT_LONG:
case CONSTANT_DOUBLE:
skip(8);
break;
case CONSTANT_CLASS:
case CONSTANT_STRING:
skip(2);
break;
case CONSTANT_INTEGER:
case CONSTANT_FLOAT:
case CONSTANT_FIELD:
case CONSTANT_METHOD:
case CONSTANT_INTERFACEMETHOD:
case CONSTANT_NAMEANDTYPE:
skip(4);
break;
case CONSTANT_METHODHANDLE:
skip(3);
break;
case CONSTANT_METHODTYPE:
skip(2);
break;
case CONSTANT_INVOKEDYNAMIC:
skip(4);
break;
case 0:
default:
throw new ClassFormatError("invalid constant type: " + tag);
}
}
}
}
}