[llvm-dev] Where does the LLVM implement the Ubsan's instrumentations?

Shi, Steven via llvm-dev
2017-07-21T01:46:15Z

Hello,
I'm investigating on enabling the Ubsan in my firmware. I have two questions
about Ubsan:
1.            I see the Ubsan run-time lib functions are defined in
http://llvm.org/svn/llvm-project/compiler-rt/trunk/lib/ubsan/ubsan_interface.inc,
but I cannot find how the LLVM implement the Ubsan instrumentations. I see the
Asan's instrumentation lib is in
http://llvm.org/svn/llvm-project/llvm/trunk/lib/Transforms/Instrumentation/AddressSanitizer.cpp,
but where is the Ubsan instrumentation lib?
2.            My firmware usage scenario is quite sensitive to the code size.
Does the Ubsan have the build option to use callbacks instead of inline code for
the Ubsan instrumentations (like Asan's
-asan-instrumentation-with-call-threshold=0) ?

Thanks
Steven
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