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

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 2 along with this work; if not, write to the Free Software Foundation,
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/*
 * @test
 * @bug 4955930
 * @summary The "method0" StackMap attribute should have two entries instead of three
 * @library /tools/lib
 * @modules jdk.compiler/com.sun.tools.javac.api
 *          jdk.compiler/com.sun.tools.javac.main
 *          jdk.jdeps/com.sun.tools.javap
 * @build toolbox.ToolBox toolbox.JavapTask
 * @run compile StackMapTest.java
 * @run main StackMapTest
 */

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

import toolbox.JavapTask;
import toolbox.Task;
import toolbox.ToolBox;

// 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 {
        ToolBox tb = new ToolBox();
        Path pathToClass = Paths.get(ToolBox.testClasses, "StackMapTest$Test.class");
        String javapOut = new JavapTask(tb)
                .options("-v")
                .classes(pathToClass.toString())
                .run()
                .getOutput(Task.OutputKind.DIRECT);

        if (!javapOut.contains("StackMapTable: number_of_entries = 2"))
            throw new AssertionError("The number of entries of the stack map "
                    + "table should be equal to 2");
    }

}