Class SystemPropertiesRuntime

  • All Implemented Interfaces:
    IExecutionDataAccessorGenerator, IRuntime

    public class SystemPropertiesRuntime
    extends AbstractRuntime
    This IRuntime implementation makes the execution data available through a special entry in the System.getProperties() hash table. The advantage is, that the instrumented classes do not get dependencies to other classes than the JRE library itself. This runtime may cause problems in environments with security restrictions, in applications that replace the system properties or in applications that fail if non-String values are placed in the system properties.
    • Field Summary

      Fields 
      Modifier and Type Field Description
      private java.lang.String key  
      private static java.lang.String KEYPREFIX  
    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      int generateDataAccessor​(long classid, java.lang.String classname, int probecount, org.objectweb.asm.MethodVisitor mv)
      This method generates the byte code required to obtain the coverage data structure for the class with the given id.
      void shutdown()
      Allows the coverage runtime to cleanup internals.
      void startup​(RuntimeData data)
      Subclasses must call this method when overwriting it.
      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
    • Field Detail

      • key

        private final java.lang.String key
    • Constructor Detail

      • SystemPropertiesRuntime

        public SystemPropertiesRuntime()
        Creates a new runtime.
    • Method Detail

      • generateDataAccessor

        public int generateDataAccessor​(long classid,
                                        java.lang.String classname,
                                        int probecount,
                                        org.objectweb.asm.MethodVisitor mv)
        Description copied from interface: IExecutionDataAccessorGenerator
        This method generates the byte code required to obtain the coverage data structure for the class with the given id. Typically the instrumentation process will embed this code into a method that is called on class initialization. This method can be called at any time even outside the target VM. The generated code must push a boolean[] instance to the operand stack. Except this result object the generated code must not make any assumptions about the structure of the embedding method or class. The generated code must not use or allocate local variables.
        Parameters:
        classid - identifier of the class
        classname - VM class name
        probecount - probe count for this class
        mv - code output
        Returns:
        additional stack size required by the implementation, including the instance pushed to the stack
      • startup

        public void startup​(RuntimeData data)
                     throws java.lang.Exception
        Description copied from class: AbstractRuntime
        Subclasses must call this method when overwriting it.
        Specified by:
        startup in interface IRuntime
        Overrides:
        startup in class AbstractRuntime
        Parameters:
        data - the execution data for this runtime
        Throws:
        java.lang.Exception - any internal problem during startup
      • shutdown

        public void shutdown()
        Description copied from interface: IRuntime
        Allows the coverage runtime to cleanup internals. This class should be called when classes instrumented for this runtime are not used any more.