- .dex : Java to java bytecode through javac, android converts java bytecode to dalvik through dx or D8. This bytecode is wrapped into dex format. https://source.android.com/devices/tech/dalvik/dex-format.
- .odex :
- .vdex :
- .art :
- .oat :
Tools:
- dex2oat :
- dalvikvm :
- app_process :
Init runs /system/bin/app_process (a c++ program), and name this process as zygote.
As in init.rc:
service zygote /system/bin/app_process -Xzygote /system/bin --zygote --start-system-server
Usage of app_process is:
Usage: app_process [java-options] cmd-dir start-class-name [options]
app_process does runtime.start("com.android.internal.os.ZygoteInit", startSystemServer)
- https://developer.android.com/training/articles/perf-jni
- JNI Heap view in memory profile
https://developer.android.com/training/articles/perf-jni
- JavaVM
- JNIEnv: JNI Apis/functions as first argument. Used for thread local storage. Can't be shared b/w threads.