| /* |
| * 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() |
| } |