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*
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* version 2 for more details (a copy is included in the LICENSE file that
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*
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* 2 along with this work; if not, write to the Free Software Foundation,
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/**
* @test
* @bug 6330997
* @summary javac should accept class files with major version of the next release
* @author Wei Tao
* @clean T1 T2
* @compile T1.java
* @compile T2.java
* @run main/othervm T6330997
*/
import java.nio.*;
import java.io.*;
import java.nio.channels.*;
import com.sun.tools.javac.api.JavacTaskImpl;
import com.sun.tools.javac.jvm.ClassReader.BadClassFile;
import com.sun.tools.javac.main.JavaCompiler;
import javax.tools.ToolProvider;
public class T6330997 {
public static void main(String... args) {
increaseMajor("T1.class", 1);
increaseMajor("T2.class", 2);
javax.tools.JavaCompiler tool = ToolProvider.getSystemJavaCompiler();
JavacTaskImpl task = (JavacTaskImpl)tool.getTask(null, null, null, null, null, null);
JavaCompiler compiler = JavaCompiler.instance(task.getContext());
try {
compiler.resolveIdent("T1").complete();
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException("Failed: unexpected exception while reading class T1");
}
try {
compiler.resolveIdent("T2").complete();
} catch (BadClassFile e) {
System.err.println("Passed: expected completion failure " + e.getClass().getName());
return;
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException("Failed: unexpected exception while reading class T2");
}
throw new RuntimeException("Failed: no error reported");
}
// Increase class file cfile's major version by delta
static void increaseMajor(String cfile, int delta) {
try {
RandomAccessFile cls = new RandomAccessFile(
new File(System.getProperty("test.classes", "."), cfile), "rw");
FileChannel fc = cls.getChannel();
ByteBuffer rbuf = ByteBuffer.allocate(2);
fc.read(rbuf, 6);
ByteBuffer wbuf = ByteBuffer.allocate(2);
wbuf.putShort(0, (short)(rbuf.getShort(0) + delta));
fc.write(wbuf, 6);
fc.force(false);
cls.close();
} catch (Exception e){
e.printStackTrace();
throw new RuntimeException("Failed: unexpected exception");
}
}
}