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...> LLVM/statepoint GC does not support option (2), but the CoreCLR’s GC-table Encoding has an interface designed to suite both modes. > void DefineCallSites(UINT32* pCallSites, BYTE* pCallSiteSizes, UINT32 numCallSites) > > Therefore, it is helpful to have Call-Site size specified in StackMapRecord. > I agree with Andy, that the call-site size should include all bytes between the start of the call instruction and the start of the next instruction. I suggested this because we want to support a dynamic callback that determines the patchpoint size (given the set of register arguments), and i...

...Registers uint16 : Frame Register Index uint16 : Num StackMap Records uint16 : StackMap Record Index } align to 4 bytes FrameRegister[] { uint16 : Dwarf RegNum int16 : Offset uint8 : Size in Bytes uint8 : Flags { bool : IsSpilled bool : Reserved [7] } } align to 8 bytes StackMapRecord[] { uint64 : PatchPoint ID uint32 : Instruction Offset uint8 : Call size (bytes) uint8 : Flags { bool : HasLiveOutInfo bool : Reserved [7] } uint16 : Num Locations uint16 : Location Index uint16 : Num LiveOuts uint16 : LiveOut Index } align to 4 bytes Location[] { uin...