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/*
* Copyright (c) 2005, 2015, 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 5024104
* @summary Test ReferenceType.majorVersion(), minorVersion, constantPoolCount and ConstantPool apis.
* @author Swamy Venkataramanappa
*
* @run build TestScaffold VMConnection
* @run compile -g ConstantPoolInfo.java
* @run driver ConstantPoolInfo
*/
import com.sun.jdi.*;
import com.sun.jdi.event.*;
import com.sun.jdi.request.*;
import java.util.*;
import java.io.*;
/********** target program **********/
class ConstantPoolTarg {
public static void main(String[] args){
System.out.println("Howdy!"); // don't change the string value "Howdy!" it is
// used to test the constant pool entry
}
}
/********** test program **********/
public class ConstantPoolInfo extends TestScaffold {
ReferenceType targetClass;
ThreadReference mainThread;
int cpool_count;
byte[] cpbytes;
static int expectedMajorVersion;
static int expectedMinorVersion;
static int expectedCpoolCount;
/* Class File Constants */
public static final int JAVA_MAGIC = 0xcafebabe;
/* Constant table : copied from sun/javap */
public static final int CONSTANT_UTF8 = 1;
public static final int CONSTANT_UNICODE = 2;
public static final int CONSTANT_INTEGER = 3;
public static final int CONSTANT_FLOAT = 4;
public static final int CONSTANT_LONG = 5;
public static final int CONSTANT_DOUBLE = 6;
public static final int CONSTANT_CLASS = 7;
public static final int CONSTANT_STRING = 8;
public static final int CONSTANT_FIELD = 9;
public static final int CONSTANT_METHOD = 10;
public static final int CONSTANT_INTERFACEMETHOD = 11;
public static final int CONSTANT_NAMEANDTYPE = 12;
ConstantPoolInfo (String args[]) {
super(args);
}
public static void main(String[] args) throws Exception {
new ConstantPoolInfo(args).startTests();
}
/********** test core **********/
protected void runTests() throws Exception {
/*
* Get to the top of main()
* to determine targetClass and mainThread
*/
BreakpointEvent bpe = startToMain("ConstantPoolTarg");
targetClass = bpe.location().declaringType();
mainThread = bpe.thread();
String targPathname = System.getProperty("test.classes") + File.separator + "ConstantPoolTarg.class";
readClassData(new FileInputStream(targPathname));
/* Test constant pool apis
*/
if (vm().canGetClassFileVersion()) {
if (expectedMajorVersion != targetClass.majorVersion()) {
failure("unexpected major version: actual value: " + targetClass.majorVersion()
+ "expected value :" + expectedMajorVersion);
}
if (expectedMinorVersion != targetClass.minorVersion()) {
failure("unexpected minor version: actual value: " + targetClass.minorVersion()
+ "expected value :" + expectedMinorVersion);
}
} else {
System.out.println("can get class version not supported");
}
if (vm().canGetConstantPool()) {
cpool_count = targetClass.constantPoolCount();
cpbytes = targetClass.constantPool();
try {
printcp();
} catch (IOException x){
System.out.println("IOexception reading cpool bytes " + x);
}
if (expectedCpoolCount != cpool_count) {
failure("unexpected constant pool count: actual value: " + cpool_count
+ "expected value :" + expectedCpoolCount);
}
} else {
System.out.println("can get constant pool version not supported");
}
/*
* resume until end
*/
listenUntilVMDisconnect();
/*
* deal with results of test
* if anything has called failure("foo") testFailed will be true
*/
if (!testFailed) {
println("ConstantPoolInfo: passed");
} else {
throw new Exception("ConstantPoolInfo: failed");
}
}
public void printcp() throws IOException {
boolean found = false;
ByteArrayInputStream bytesStream = new ByteArrayInputStream(cpbytes);
DataInputStream in = new DataInputStream(bytesStream);
for (int i = 1; i < cpool_count; i++) {
int tag = in.readByte();
System.out.print("const #" + i + ": ");
switch(tag) {
case CONSTANT_UTF8:
String str=in.readUTF();
System.out.println("Asciz " + str);
// "Howdy!" is an expected constant pool entry
// of test program. It should exist.
if (str.compareTo("Howdy!") == 0) {
found = true;
}
break;
case CONSTANT_INTEGER:
System.out.println("int " + in.readInt());
break;
case CONSTANT_FLOAT:
System.out.println("Float " + in.readFloat());
break;
case CONSTANT_LONG:
System.out.println("Long " + in.readLong());
break;
case CONSTANT_DOUBLE:
System.out.println("Double " + in.readDouble());
break;
case CONSTANT_CLASS:
System.out.println("Class " + in.readUnsignedShort());
break;
case CONSTANT_STRING:
System.out.println("String " + in.readUnsignedShort());
break;
case CONSTANT_FIELD:
System.out.println("Field " + in.readUnsignedShort() + " " + in.readUnsignedShort());
break;
case CONSTANT_METHOD:
System.out.println("Method " + in.readUnsignedShort() + " " + in.readUnsignedShort());
break;
case CONSTANT_INTERFACEMETHOD:
System.out.println("InterfaceMethod " + in.readUnsignedShort() + " " + in.readUnsignedShort());
break;
case CONSTANT_NAMEANDTYPE:
System.out.println("NameAndType " + in.readUnsignedShort() + " " + in.readUnsignedShort());
break;
case 0:
default:
System.out.println("class format error");
}
}
if (!found) {
failure("expected string \"Howdy!\" not found in constant pool");
}
}
/**
* Read classfile
*/
void readClassData(InputStream infile){
try{
this.read(new DataInputStream(infile));
}catch (FileNotFoundException ee) {
failure("cant read file");
}catch (Error ee) {
ee.printStackTrace();
failure("fatal error");
} catch (Exception ee) {
ee.printStackTrace();
failure("fatal exception");
}
}
/**
* Read major, minor and cp count.
*/
public void read(DataInputStream in) throws IOException {
int magic = in.readInt();
if (magic != JAVA_MAGIC) {
failure("fatal bad class file format");
}
expectedMinorVersion = in.readShort();;
expectedMajorVersion = in.readShort();
expectedCpoolCount = in.readUnsignedShort();
in.close();
} // end read()
}
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