UBSan runtime options

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1

Hello,

I have several low priority UBSan questions...

(1) Is there a way for UBSan to print its output to a file that the user specified (e.g. via option) instead of dumping everything on stderr?

(2) Out of curiosity, why is the name of the option for printing the stacktrace spelled

"UBSAN_OPTIONS=print_stacktrace=1", though the allowed value is 1?
Since the only one value is accepted, maybe it's more practical (and intuitive) to spell it

"UBSAN_OPTIONS=print_stacktrace"

(4) Do you know if there is better (i.e. more complete) documentation for UBSan somewhere?
This one is pretty good, but it doesn't talk about many things. E.g. it doesn't describe the runtime options that are possible to pass to UBSan (like the one that I talked about earlier).
http://clang.llvm.org/docs/UsersManual.html
This page below doesn't seems to mention UBSan at all (unlike the others most commonly used sanitizers). Is it done on purpose? Or it's a work in progress?
http://clang.llvm.org/docs/

Thanks, Katya.

2

Hello,

I have several low priority UBSan questions…

(1) Is there a way for UBSan to print its output to a file that the user specified (e.g. via option) instead of dumping everything on stderr?

UBSAN_OPTIONS=log_path=YOUR_FILE

(2) Out of curiosity, why is the name of the option for printing the
stacktrace spelled

"UBSAN_OPTIONS=print_stacktrace=1", though the allowed value is 1?

the other allowed value is 0, and this is just a common syntax for all the

flags.

Since the only one value is accepted, maybe it's more practical (and
intuitive) to spell it

"UBSAN_OPTIONS=print_stacktrace"

(4) Do you know if there is better (i.e. more complete) documentation for
UBSan somewhere?

We hope to have clang.llvm.org/docs/UndefinedBehaviorSanitizer.html or some
such in at most ~2 weeks (yes, this is long overdue, sorry).

3

Excellent!

Thank you, Kostya.

Katya.