llvm dev - Jan 2019 - Is there a way to trace what code block in a bitcode file is run?

Hi Peng,


Do you require basic block coverage? As far as I know, there is no such trace
provided in LLVM.



If  you just want simple basic block trace (without overhead), you could  try
instrument all basic blocks and print information you want.



If you have higher expectations and care about performance overhead, it's
better to check academic paper for existing solutions.


BTW, Clang 9 has a new feature (with coverage):
https://clang.llvm.org/docs/SanitizerCoverage.html


Cheers,
Yushan
 
------------------ Original ------------------
From:  "Peng Yu via llvm-dev"<llvm-dev at lists.llvm.org>;
Date:  Tue, Jan 22, 2019 01:10 AM
To:  "llvm-dev"<llvm-dev at lists.llvm.org>; 
Subject:  [llvm-dev] Is there a way to trace what code block in a bitcode file
is run?

 
Hi,

The cfg pass is only a static analysis of a bitcode file. Is there a
way to trace what code blocks in a bitcode file actually run? Thanks.

-- 
Regards,
Peng
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