Java.enumerateLoadedClasses throws an error (access violation) about frida-node

[oleavr]

Let's keep tracking this at frida/frida-java-bridge#7.

[enovella]

Getting something very similar with latest Frida & r2frida (all in latest versions v12.2.12)

Unhandled message: {"type":"error","description":"Error: access violation accessing 0x0","stack":"Error: access violation accessing 0x0\n    at input:1\n    at frida/node_modules/frida-java/index.js:339\n    at input:1","fileName":"input","lineNumber":1,"columnNumber":1}

Any regression or something? It is only happens in the newer version of the app I'm working with. With the previous everything works fine.

[enovella]

If I clear the cache and data of the app before starting the app, the error doesn't show up anymore. But this need to be done everytime before running Frida/r2frida.

[oleavr]

Interesting. The only recent change is that we hook one additional method when Java.perform() is called early in the process lifetime. However, I have heard of such crashes happening randomly in other cases, so my gut feeling is that the recent change just amplified an existing bug. Now we just have to find it. ;-) At least it's gotten more reproducible.

Did you try running the code on our V8-based runtime just for kicks? If you want to try this on r2frida you can add frida_session_enable_jit_sync (session, NULL); before the first script is created.