org.robolectric.internal.bytecode

Class InstrumentingClassWriter

java.lang.Object

org.objectweb.asm.ClassVisitor

org.objectweb.asm.ClassWriter

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

Method Summary

Modifier and Type	Method and Description
protected java.lang.String	getCommonSuperClass(java.lang.String type1, java.lang.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, visitSource, visitTypeAnnotation

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

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 java.lang.String getCommonSuperClass(java.lang.String type1,
                                               java.lang.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