[PATCH] ubsan: Do not run the testsuite if ubsan does not work at all

[Eric Botcazou]

> I normally build with --disable-libsanitizer, because the sanitizers
> testresults are very unreproducable, so just annoying noise.  This however
> makes most (all?) ubsan testcases fail, since they want to load a shared
> library that does not exist.

Same here, but I also have the problem with tsan testcases.

> gcc/testsuite/
> 	* lib/ubsan-dg.exp (check_effective_target_fsanitize_undefined):
> 	Check if testcases run without errors, not just if they compile.

I additionally need:

        * lib/tsan-dg.exp (check_effective_target_fsanitize_thread):
        Check if testcases run without errors, not just if they compile.


-- 
Eric Botcazou
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