Question

我使用新的cobertura (2.0.2..)获得以下异常。我想这与新块中的新对象创建有关。

WARN   instrumentClass, Unable to instrument file c:\apps\ijprojects\TrickyInstrument\out\production\TrickyInstrument\InstrumentationFailsOnFirstNewClassInTryBlock.class
java.lang.RuntimeException: java.lang.ClassNotFoundException: DataAccess
        at org.objectweb.asm.ClassWriter.getCommonSuperClass(Unknown Source)
        at org.objectweb.asm.ClassWriter.a(Unknown Source)
        at org.objectweb.asm.Frame.a(Unknown Source)
        at org.objectweb.asm.Frame.a(Unknown Source)
        at org.objectweb.asm.MethodWriter.visitMaxs(Unknown Source)
        at org.objectweb.asm.MethodVisitor.visitMaxs(Unknown Source)
        at org.objectweb.asm.util.CheckMethodAdapter.visitMaxs(Unknown Source)
        at org.objectweb.asm.MethodVisitor.visitMaxs(Unknown Source)
        at org.objectweb.asm.commons.LocalVariablesSorter.visitMaxs(Unknown Source)
        at org.objectweb.asm.tree.MethodNode.accept(Unknown Source)
        at org.objectweb.asm.util.CheckMethodAdapter$1.visitEnd(Unknown Source)
        at org.objectweb.asm.MethodVisitor.visitEnd(Unknown Source)
        at org.objectweb.asm.util.CheckMethodAdapter.visitEnd(Unknown Source)
        at org.objectweb.asm.ClassReader.b(Unknown Source)
        at org.objectweb.asm.ClassReader.accept(Unknown Source)
        at org.objectweb.asm.ClassReader.accept(Unknown Source)
        at net.sourceforge.cobertura.instrument.CoberturaInstrumenter.instrumentClass(CoberturaInstrumenter.java:204)
        at net.sourceforge.cobertura.instrument.CoberturaInstrumenter.instrumentClass(CoberturaInstrumenter.java:121)
        at net.sourceforge.cobertura.instrument.CoberturaInstrumenter.addInstrumentationToSingleClass(CoberturaInstrumenter.java:233)
        at net.sourceforge.cobertura.instrument.Main.addInstrumentationToSingleClass(Main.java:274)
        at net.sourceforge.cobertura.instrument.Main.addInstrumentation(Main.java:283)
        at net.sourceforge.cobertura.instrument.Main.addInstrumentation(Main.java:292)
        at net.sourceforge.cobertura.instrument.Main.parseArguments(Main.java:373)
        at net.sourceforge.cobertura.instrument.Main.main(Main.java:395)
8 Jul, 2013 2:05:07 PM net.sourceforge.cobertura.coveragedata.CoverageDataFileHandler saveCoverageData
INFO: Cobertura: Saved information on 2 classes.

以下是与上述异常相关的代码。

public class InstrumentationFailsOnFirstNewClassInTryBlock {


    public void saveToDatabase() {
        //
        try {
//            boolean b=false;
//            if ( b) {
//                System.out.println("no action");
//            }
            DataAccess da = new DataAccess();
            System.out.println("nothing");

        } catch (Exception e) {


        }
    }
}
  class DataAccess {
    public DataAccess() {
        //To change body of created methods use File | Settings | File Templates.
    }
}

如果我取消注释代码阻止一些虚拟语句，那么检测工作正常。有谁见过这个？任何可能的修复？

编辑：java6和java7发生错误。

Answer 1

原始问题是由于Cobertura缺陷造成的。它不是固定的。 Cobertura现在支持auxillary classpath.的另一个论点。这将用于解决检测所需的任何类。

cobertura-ant task documentation

添加auxClasspath

auxClasspath参数旨在删除ClassNotFoundException   仪器仪表期间。看到   https://github.com/cobertura/cobertura/wiki/FAQ#classnotfoundexception-during-instrumentation   有关此论点的更多信息

Answer 2

我有类似的问题，可能是个错误，请参阅：https://github.com/cobertura/cobertura/issues/49

您的测试用例可能对调试问题很有用......

Answer 3

来自https://github.com/cobertura/cobertura/wiki/FAQ#classnotfoundexception-during-instrumentation：

＆＃34;这是因为在cobertura 2.0中的检测期间，我们使用ASM来重建.class文件。我们重建了stackmap，这是与java 7以及之后的任何东西兼容的要求。这并不意味着我们重新编译代码，但ASM要求我们提供其他类的二进制文件，以防它需要查找任何超级方法。为了解决这个问题，我们使用了一个名为auxClasspath的参数。＆＃34;

将以下代码添加到ant文件（build.xml）应解决此问题。

<path id="cobertura.auxpath">
<pathelement location="${bin}"/>
    </path>

    <target name="instrument_coverage" depends="init_coverage"
        description="Instruments source code for coverage measurement">
        <cobertura-instrument datafile="${coverage.datafile}">
            <fileset refid="coverage-files"/>
        <auxClasspath>
              <path refid="cobertura.auxpath" />
            </auxClasspath>
        </cobertura-instrument>
    </target>

这对我有用。

java.lang.RuntimeException：java.lang.ClassNotFoundException：<org.objectweb.asm.classwriter.getcommonsuperclass（unknown source）=“”> </org.objectweb.asm.classwriter.getcommonsuperclass（unknown>

3 个答案: