langtools/test/tools/javac/stackmap/StackMapTest.java

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/*
 * @test
 * @bug 4955930
 * @summary The "method0" StackMap attribute should have two entries instead of three
 * @library /tools/javac/lib
 * @build ToolBox
 * @run compile -source 6 -target 6 StackMapTest.java
 * @run main StackMapTest
 */

import java.nio.file.Path;
import java.nio.file.Paths;

//original test: test/tools/javac/stackmap/T4955930.sh
public class StackMapTest {

    class Test {
        void method0(boolean aboolean) throws Exception {
            label_0:
            while (true) {
                if (aboolean) ;
                else break label_0;
            }
        }
    }

    public static void main(String args[]) throws Exception {
//    "${TESTJAVA}${FS}bin${FS}javac" ${TESTTOOLVMOPTS} -source 6 -target 6 T4955930.java

//    "${TESTJAVA}${FS}bin${FS}javap" ${TESTTOOLVMOPTS} -verbose T4955930 > ${TMP1}
        Path pathToClass = Paths.get(System.getProperty("test.classes"),
                "StackMapTest$Test.class");
        ToolBox.JavaToolArgs javapArgs =
                new ToolBox.JavaToolArgs().setAllArgs("-v", pathToClass.toString());

//        grep "StackMapTable: number_of_entries = 2" ${TMP1}
        if (!ToolBox.javap(javapArgs).contains("StackMapTable: number_of_entries = 2"))
            throw new AssertionError("The number of entries of the stack map "
                    + "table should be equal to 2");
    }

}