what is the use of art_quick_dexposed_invoke_handler?

[Juude]

Hello, I just read the source code and want to know what art_quick_dexposed_invoke_handler does.
And how do hook ArtMethod ?

[pcqpcq]

Talk is cheap, read the code youself.

btw, is this an issue? i don't think so.

[Juude]

• I don't think code can replace documents, which can give you a general understanding and read codes quickly.It would be very appreciate to have your explanation of how it works.
• sorry for giving the issue here, but cannot find another place to ask this question.

[pcqpcq]

I don't think code can replace documents

i agree with this, this repo is lack of documents for now. maybe they will complete it later.

[hwjump]

You can read the ART source code, how it do with Java Method invoke. art_quick_dexposed_invoke_handler is same as art_quick_invoke_stub in quick_entrypoints_arm.S.
It was just a bridge between C and Assembly. Almost all artmethod invoke need this process, because Art use specail protocol stack between C and Assembly.
Thank you!

[hwjump]

how it hook ArtMethod you can read https://github.com/alibaba/dexposed/blob/master/dexposed/dexposed_art/dexposed.cpp#L238

we use SetEntryPointFromQuickCompiledCode to change the ArtMethod entry.

[Juude]

very informative, thanks!