Package org.robolectric.internal.bytecode

Class InstrumentingClassWriter

  • public class InstrumentingClassWriter
extends org.objectweb.asm.ClassWriter
    ClassWriter implementation that verifies classes by comparing type information obtained from loading the classes as resources. This was taken from the ASM ClassWriter unit tests.

    • Field Summary

      • Fields inherited from class org.objectweb.asm.ClassWriter

        COMPUTE_FRAMES, COMPUTE_MAXS

      • Fields inherited from class org.objectweb.asm.ClassVisitor

        api, cv

    • Constructor Summary

      Constructors 
      Constructor Description
      InstrumentingClassWriter​(ClassNodeProvider classNodeProvider, org.objectweb.asm.tree.ClassNode classNode)
      Preserve stack map frames for V51 and newer bytecode.

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      protected String getCommonSuperClass​(String type1, String type2)
      Returns the common super type of the two given types without actually loading the classes in the ClassLoader.

      • Methods inherited from class org.objectweb.asm.ClassWriter

        getClassLoader, newClass, newConst, newConstantDynamic, newField, newHandle, newHandle, newInvokeDynamic, newMethod, newMethodType, newModule, newNameType, newPackage, newUTF8, toByteArray, visit, visitAnnotation, visitAttribute, visitEnd, visitField, visitInnerClass, visitMethod, visitModule, visitNestHost, visitNestMember, visitOuterClass, visitPermittedSubclass, visitRecordComponent, visitSource, visitTypeAnnotation

    • Constructor Detail

      • InstrumentingClassWriter

        public InstrumentingClassWriter​(ClassNodeProvider classNodeProvider,
                                org.objectweb.asm.tree.ClassNode classNode)
        Preserve stack map frames for V51 and newer bytecode. This fixes class verification errors for JDK7 and JDK8. The option to disable bytecode verification was removed in JDK8.

        Don't bother for V50 and earlier bytecode, because it doesn't contain stack map frames, and also because ASM's stack map frame handling doesn't support the JSR and RET instructions present in legacy bytecode.

    • Method Detail

      • getCommonSuperClass

        protected String getCommonSuperClass​(String type1,
                                     String type2)
        Returns the common super type of the two given types without actually loading the classes in the ClassLoader.
        Overrides:
        getCommonSuperClass in class org.objectweb.asm.ClassWriter