2018-11-19 16:09:37 +01:00
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(** Frontend
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Clean printers, etc.
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*)
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let pp_int64_hex ppx number =
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let mask_short = Int64.(pred (shift_left one 16)) in
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let pp_short number =
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Format.fprintf ppx "%04x" Int64.(to_int (logand number mask_short))
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in
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List.iter pp_short @@ List.map (fun x ->
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Int64.(shift_right number (16*x))) [3;2;1;0]
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2018-11-19 18:11:20 +01:00
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let pp_cfa_change ppx addr pos = Simplest.(
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2018-11-19 16:09:37 +01:00
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let num_len num =
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let str_rep = Format.sprintf "%+d" num in
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String.length str_rep
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in
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let print_row cfa_reg int64_offset =
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let offset = Int64.to_int int64_offset in
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let post_offset_spaces = String.make (6 - num_len offset) ' ' in
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Format.fprintf ppx "%a %s%+d%sc-8@."
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pp_int64_hex addr cfa_reg offset post_offset_spaces
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in
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match pos with
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| RspOffset offset ->
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print_row "rsp" offset
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| RbpOffset offset ->
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print_row "rbp" offset
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| CfaLostTrack ->
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Format.fprintf ppx "%a u u@." pp_int64_hex addr
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)
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2018-11-20 16:55:56 +01:00
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let pp_pre_dwarf_readelf ppx (pre_dwarf: Simplest.subroutine_cfa_map) =
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Simplest.(
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Simplest.StrMap.iter (fun fde_name entry ->
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Format.fprintf ppx "FDE %s pc=%a..%a@."
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fde_name pp_int64_hex entry.beg_pos pp_int64_hex entry.end_pos;
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let cfa_entry = entry.cfa_changes_fde in
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if not (Simplest.AddrMap.is_empty cfa_entry) then (
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Format.fprintf ppx " LOC CFA ra@." ;
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Simplest.AddrMap.iter (pp_cfa_change ppx) cfa_entry ;
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Format.fprintf ppx "@.")
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)
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pre_dwarf
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)
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