/*
* Copyright ( c ) 2010 , 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 6932496
* @ summary incorrect deopt of jsr subroutine on 64 bit c1
* @ modules java . base / jdk . internal . org . objectweb . asm
*
* @ run main / othervm - Xcomp
* - XX : CompileCommand = compileonly , compiler . c1 . Test6932496 : : test
* compiler . c1 . Test6932496
*/
package compiler.c1;
import jdk.internal.org.objectweb.asm.ClassWriter;
import jdk.internal.org.objectweb.asm.FieldVisitor;
import jdk.internal.org.objectweb.asm.Label;
import jdk.internal.org.objectweb.asm.MethodVisitor;
import jdk.internal.org.objectweb.asm.Opcodes;
import jdk.internal.org.objectweb.asm.Type;
import java.io.IOException;
import java.lang.reflect.Method;
import java.nio.file.Files;
import java.nio.file.Paths;
public class Test6932496 extends ClassLoader {
private static final int CLASS_FILE_VERSION = 49 ;
private static final String CLASS_TEST = "Test" ;
private static final String CLASS_OBJECT = "java/lang/Object" ;
private static final String METHOD_INIT = "<init>" ;
private static final String METHOD_TEST = "test" ;
private static final String DESC_VOID_METHOD = "()V" ;
private static final String FIELD_FLAG = "flag" ;
public static void main(String[] args) {
Test6932496 test = new Test6932496();
test.execute();
}
private void execute() {
byte [] bytecode = Test6932496.generateTestClass();
try {
Files.write(Paths.get("Test.class.dump" ), bytecode);
} catch (IOException e) {
System.err.println("classfile dump failed : " + e.getMessage());
e.printStackTrace();
}
try {
Class aClass = defineClass(CLASS_TEST, bytecode, 0 , bytecode.length);
Method test = aClass.getDeclaredMethod(METHOD_TEST);
test.invoke(null );
} catch (ClassFormatError | IllegalArgumentException
| ReflectiveOperationException e) {
throw new RuntimeException("TESTBUG : generated class is invalid" , e);
}
}
/*
public class Test {
volatile boolean flag = false ;
public static void m ( ) {
try {
} finally {
Test test = new Test ( ) ;
test . flag = true ;
}
}
}
*/
private static byte [] generateTestClass() {
ClassWriter cw = new ClassWriter(0 );
cw.visit(CLASS_FILE_VERSION, Opcodes.ACC_PUBLIC + Opcodes.ACC_SUPER,
CLASS_TEST, null , CLASS_OBJECT, null );
// volatile boolean flag;
{
FieldVisitor fv = cw.visitField(Opcodes.ACC_VOLATILE, FIELD_FLAG,
Type.BOOLEAN_TYPE.getDescriptor(),
/* signature = */ null, /* value = */ null);
}
/*
public Test ( ) {
flag = false ;
}
*/
{
MethodVisitor mv = cw.visitMethod(Opcodes.ACC_PUBLIC,
METHOD_INIT, DESC_VOID_METHOD,
/* signature = */ null, /* exceptions = */ null);
mv.visitCode();
mv.visitVarInsn(Opcodes.ALOAD, 0 );
mv.visitMethodInsn(Opcodes.INVOKESPECIAL, CLASS_OBJECT, METHOD_INIT,
DESC_VOID_METHOD, false );
mv.visitVarInsn(Opcodes.ALOAD, 0 );
mv.visitInsn(Opcodes.ICONST_0);
mv.visitFieldInsn(Opcodes.PUTFIELD, CLASS_TEST, FIELD_FLAG,
Type.BOOLEAN_TYPE.getDescriptor());
mv.visitInsn(Opcodes.RETURN );
mv.visitMaxs(/* stack = */ 2, /* locals = */ 1);
mv.visitEnd();
}
/*
public static void m ( ) {
try {
} finally {
Test test = new Test ( ) ;
test . flag = true ;
}
}
*/
{
MethodVisitor mv = cw.visitMethod(
Opcodes.ACC_STATIC + Opcodes.ACC_PUBLIC,
METHOD_TEST, DESC_VOID_METHOD,
/* signature = */ null, /* exceptions = */ null);
Label beginLabel = new Label();
Label block1EndLabel = new Label();
Label handlerLabel = new Label();
Label block2EndLabel = new Label();
Label label = new Label();
Label endLabel = new Label();
mv.visitCode();
mv.visitTryCatchBlock(beginLabel, block1EndLabel, handlerLabel,
/* type = <any> */ null);
mv.visitTryCatchBlock(handlerLabel, block2EndLabel, handlerLabel,
/* type = <any> */ null);
mv.visitLabel(beginLabel);
mv.visitJumpInsn(Opcodes.JSR, label);
mv.visitLabel(block1EndLabel);
mv.visitJumpInsn(Opcodes.GOTO , endLabel);
mv.visitLabel(handlerLabel);
mv.visitVarInsn(Opcodes.ASTORE, 0 );
mv.visitJumpInsn(Opcodes.JSR, label);
mv.visitLabel(block2EndLabel);
mv.visitVarInsn(Opcodes.ALOAD, 0 );
mv.visitInsn(Opcodes.ATHROW);
mv.visitLabel(label);
mv.visitVarInsn(Opcodes.ASTORE, 1 );
mv.visitTypeInsn(Opcodes.NEW , CLASS_TEST);
mv.visitInsn(Opcodes.DUP);
mv.visitMethodInsn(Opcodes.INVOKESPECIAL, CLASS_TEST, METHOD_INIT,
DESC_VOID_METHOD);
mv.visitVarInsn(Opcodes.ASTORE, 2 );
mv.visitVarInsn(Opcodes.ALOAD, 2 );
mv.visitInsn(Opcodes.ICONST_1);
mv.visitFieldInsn(Opcodes.PUTFIELD, CLASS_TEST, FIELD_FLAG,
Type.BOOLEAN_TYPE.getDescriptor());
mv.visitVarInsn(Opcodes.RET, 1 );
mv.visitLabel(endLabel);
mv.visitInsn(Opcodes.RETURN );
mv.visitMaxs(/* stack = */ 2, /* locals = */ 3);
mv.visitEnd();
}
cw.visitEnd();
return cw.toByteArray();
}
}
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(vorverarbeitet am 2026-10-01)
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