b7woreo / jvmti_demo

android p jvmti/android studio apply change

JVMTI_Sample

代码fork自 https://github.com/AndroidAdvanceWithGeektime/JVMTI_Sample

感谢原作者分享！

该例子主要展示了JVM TI支持的几种功能：

1. Memory Alloc Tracker
2. GC Event Tracker
3. JNI Method Rebind
4. Class Retransform
5. getObjectSize
6. RedefineClasses (实现android studio 3.5的apply change功能)

注意：例子最好在9.0上测试，支持模拟器，8.0下修改 Class 功能无效

运行界面

产生的日志可以在 Logcat 中查看

I/jvmti: ==========alloc callback======= [I {size:32}
I/jvmti: ==========alloc callback======= java.lang.ref.WeakReference {size:24}
I/jvmti: ==========alloc callback======= java.lang.ref.WeakReference {size:24}
I/jvmti: ==========alloc callback======= [Ljava.lang.Object; {size:16}
I/jvmti: ==========触发 GCStart=======
I/jvmti: ==========触发 GCFinish=======