When guest code attempts to access symbolic data, S2E translates it to LLVM up to the next control flow instruction. This block of LLVM code is packaged in a function called tcg-llvm-xxx-xxx. Some instructions are so complex that they resort to calling external helpers to perform their jobs. This results in calls to helper_xxx functions. Helpers can call standard library functions, e.g., log(). In this case, the interpreter didn't manage to find it .
If you could run "s2e export_project" and attach the file, it
would help debugging.
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在 2021年4月13日，上午5:18，Vitaly Chipounov <vit...@cyberhaven.com> 写道：
Thanks, I added the issue here: https://github.com/S2E/s2e-env/issues/435
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In this case, grepping the error message and the helper name
should give you the location.
By the way, I've just remembered that there was a very similar issue before and a PR to fix it, which didn't get merged unfortunately. Perhaps you could take it over. I updated the issue on Github.
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