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/*
* Copyright (c) 2003, 2023, 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.
*/
package nsk.jvmti.GetClassFields;
import java.io.PrintStream;
import java.io.InputStream;
import java.util.List;
import java.util.ArrayList;
import jdk.internal.org.objectweb.asm.ClassReader;
import jdk.internal.org.objectweb.asm.ClassVisitor;
import jdk.internal.org.objectweb.asm.FieldVisitor;
import jdk.internal.org.objectweb.asm.Opcodes;
public class getclfld007 {
final static int JCK_STATUS_BASE = 95;
static {
try {
System.loadLibrary("getclfld007");
} catch (UnsatisfiedLinkError ule) {
System.err.println("Could not load getclfld007 library");
System.err.println("java.library.path:"
+ System.getProperty("java.library.path"));
throw ule;
}
}
native static void check(Class cls, String[] expectedFields);
native static int getRes();
public static void main(String args[]) {
args = nsk.share.jvmti.JVMTITest.commonInit(args);
// produce JCK-like exit status.
System.exit(run(args, System.out) + JCK_STATUS_BASE);
}
public static int run(String args[], PrintStream out) {
try {
check(Class.forName(InnerClass1.class.getName()));
check(Class.forName(InnerInterface.class.getName()));
check(Class.forName(InnerClass2.class.getName()));
check(Class.forName(OuterClass1.class.getName()));
check(Class.forName(OuterClass2.class.getName()));
check(Class.forName(OuterClass3.class.getName()));
check(Class.forName(OuterInterface1.class.getName()));
check(Class.forName(OuterInterface2.class.getName()));
check(Class.forName(OuterClass4.class.getName()));
check(Class.forName(OuterClass5.class.getName()));
} catch (Exception e) {
throw new RuntimeException(e);
}
return getRes();
}
static void check(Class cls) throws Exception {
FieldExplorer explorer = new FieldExplorer(cls);
List<String> fields = explorer.get();
check(cls, fields.toArray(new String[0]));
}
// helper class to get list of the class fields
// in the order they appear in the class file
static class FieldExplorer extends ClassVisitor {
private final Class cls;
private List<String> fieldNameAndSig = new ArrayList<>();
private FieldExplorer(Class cls) {
super(Opcodes.ASM7);
this.cls = cls;
}
@Override
public FieldVisitor visitField(int access, String name, String descriptor, String signature, Object value) {
System.out.println(" field '" + name + "', type = " + descriptor);
fieldNameAndSig.add(name);
fieldNameAndSig.add(descriptor);
return super.visitField(access, name, descriptor, signature, value);
}
private InputStream getClassBytes() throws Exception {
String clsName = cls.getName();
String clsPath = clsName.replace('.', '/') + ".class";
return cls.getClassLoader().getResourceAsStream(clsPath);
}
// each field is represented by 2 Strings in the list: name and type descriptor
public List<String> get() throws Exception {
System.out.println("Class " + cls.getName());
try (InputStream classBytes = getClassBytes()) {
ClassReader classReader = new ClassReader(classBytes);
classReader.accept(this, 0);
}
return fieldNameAndSig;
}
}
static class InnerClass1 {
String fld_1;
void meth(String s) {
fld_1 = s;
}
}
static interface InnerInterface {
int fld_n1 = 1;
public void meth();
}
static class InnerClass2 implements InnerInterface {
static int fld_n2 = 0;
public void meth() {
fld_n2++;
}
}
}
class OuterClass1 extends getclfld007 {
}
class OuterClass2 extends OuterClass1 {
int fld_o2;
}
class OuterClass3 {
int fld_o3;
int meth() {
return 3;
}
}
interface OuterInterface1 {
int fld_i1 = 0;
int meth_i1();
}
interface OuterInterface2 extends OuterInterface1 {
int fld_i2 = 0;
int meth_i2();
}
abstract class OuterClass4 extends OuterClass3 implements OuterInterface2 {
int fld_i2 = 2;
public int meth_i2() {
return 2;
}
}
// class with multiple fields to verify correctness of the field order
class OuterClass5 extends OuterClass4 {
int fld_i1 = 1;
String fld_s1 = "str";
int fld_i2 = 2;
String fld_s2 = "str2";
public int meth_i1() {
return 1;
}
}
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