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thunk_target
2014 Nov 29
3
[LLVMdev] Frontend: How to use Member to Function Pointer as callbacks
...mory can't be
modified (and also not have to embed/use LLVM at runtime, just like a plain
C/C++ executable).
One (rather complicated) option I was thinking is:
- Define a maximum number of those callback alive (let's say 4096) -- it's
not per function signature, but global
- Define i8* thunkTargets[4096]
- Define i8* ThunkIdToFuncPtr[4096]
- Define 4096 funcs (not even sure how to do that with LLVM, might need to
emit assembly?)
Thunk0: jmp thunkTargets[0];
Thunk1: jmp thunkTargets[1];
...
Thunk4095: jmp thunkTargets[4095];
- When I call a C function from C# with a callback,...