https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=235611
--- Comment #2 from Michael Tuexen <tue...@freebsd.org> ---
The problem is that calling clang with -fsanitize-coverage=trace-pc,trace-cmp
-fno-sanitize=all does not turn off the coverage sanitizer.
This can be demonstrated:
tuexen@epyc:~ % cat test.c
int main(void)
{
return (0);
}
tuexen@epyc:~ % cc -fsanitize-coverage=trace-pc,trace-cmp -o test_1.o -c test.c
tuexen@epyc:~ % cc -fsanitize-coverage=trace-pc,trace-cmp
-fno-sanitize-coverage=trace-pc,trace-cmp -o test_2.o -c test.c
tuexen@epyc:~ % cc -fsanitize-coverage=trace-pc,trace-cmp -fno-sanitize=all -o
test_3.o -c test.c
tuexen@epyc:~ % ls -l test_?.o
-rw-r--r-- 1 tuexen wheel 1928 Feb 9 11:44 test_1.o
-rw-r--r-- 1 tuexen wheel 1016 Feb 9 11:44 test_2.o
-rw-r--r-- 1 tuexen wheel 1928 Feb 9 11:44 test_3.o
tuexen@epyc:~ % diff test_1.o test_3.o
So wither this is a bug in clang or you can't use -fno-sanitize=all to turn off
the coverage sanitizers.
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