Llvm C++ API pass Pointer to Function to another Function

Question

How can I pass a pointer to function to another function? I have a function like this:

std::string PRINT_STATE_NAME(pPrintState func);

where pPrintState is a typedef like this:

typedef void (*pPrintState)(std::string* buffer);

So I JITed pPrintState and have its llvm::FunctionType available.

Next I want to call PRINT_STATE_NAME() as defined above from llvm C++ API. Unfortunately I can't figure out what parameter to pass to the call instruction. Atm I made an llvm::GlobalVariable with inner type of converted pPrintState. But what should I pass as initializer? Or am I completely on the wrong track here? Any help is appreciated! Thanks!

Anton Korobeynikov · Accepted Answer · 2014-02-25 07:23:57Z

1

You need to obtain the address of pPrintState (the JIT'ed one, via getPointerToFunction() or getPointerToNamedFunction()) cast this address (as integer) to pPrintState and pass as an argument.

answered Feb 25, 2014 at 7:23

Anton Korobeynikov

9,38928 silver badges29 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Llvm C++ API pass Pointer to Function to another Function

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related