llvm dev - Mar 2019 - Annotate generated machine code / binary with LLVM basic block information

Hi everyone,
What I want to do is to generate an X86 binary that is annorated with LLVM
basic block information, which can be helpful for further trace-based
analysis. After I go through the documents, the only way I can think of is
writing a MachineFunctionPass and adding dummy instructions to the
beginning and end of each basic block that indicates its ID. Since this
requires a recompilation of entire LLVM, which is far from ideal, so I
follow the suggestion on the documentation and come and ask here first. I
am really new to LLVM, so any suggestions would be very appreciated!

Yizhou
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More specifically, I want to use two undefined instructions X86::UD2B and
X86::TRAP (declared in lib/Target/X86/X86InstrSystem.td) for annotation.
Since X86::UD2B can accept extra operands, we can put the basic block ID
there.

Yizhou Wei <787012293john at gmail.com> 于2019年3月1日周五 上午9:33写道：
> Hi everyone,
> What I want to do is to generate an X86 binary that is annorated with LLVM
> basic block information, which can be helpful for further trace-based
> analysis. After I go through the documents, the only way I can think of is
> writing a MachineFunctionPass and adding dummy instructions to the
> beginning and end of each basic block that indicates its ID. Since this
> requires a recompilation of entire LLVM, which is far from ideal, so I
> follow the suggestion on the documentation and come and ask here first. I
> am really new to LLVM, so any suggestions would be very appreciated!
>
> Yizhou
>
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