android dynamic loader

android Application Dynamic Loader Using InmemoryDexClassLoader It can be used to make Android App Packer

How to Use

build example

. ./build.sh Multidex

Adjusting in Android 8.0(Oreo)

ClassLoader Routine in Android

java

dalvik.system.Dexfile.openDexFile()

c++

DexFile_openDexFileNative

runtime->GetOatFileManager().OpenDexFilesFromOat

context = ClassLoaderContext::CreateContextForClassLoader(class_loader, dex_elements);

std::unique_ptr<ClassLoaderContext> result(new ClassLoaderContext(/*owns_the_dex_files*/ false));

if (result->AddInfoToContextFromClassLoader(soa, h_class_loader, h_dex_elements))

Inheritance structure

java.lang.Object

↳ java.lang.ClassLoader

↳    dalvik.system.BaseDexClassLoader

    ↳    dalvik.system.InMemoryDexClassLoader



java.lang.Object

    ↳    java.lang.ClassLoader

        ↳    dalvik.system.BaseDexClassLoader
    
            ↳    dalvik.system.PathClassLoader
        
                ↳    dalvik.system.DelegateLastClassLoader


java.lang.Object

    ↳ java.lang.ClassLoader

        ↳    dalvik.system.BaseDexClassLoader
    
            ↳    dalvik.system.DexClassLoader

java.lang.Object

    ↳ java.lang.ClassLoader

        ↳    dalvik.system.BaseDexClassLoader
    
            ↳    dalvik.system.PathClassLoader
        
                ↳    dalvik.system.DelegateLastClassLoader


기존 ClassLoader parent classloader -> child classloader

DelegateLastClassLoader child classloader -> parent classloader

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