Not sure how useful this will be, but I think it could be helpful to still
see section (2) functions in ktrace, even if there's magic to avoid that.
As proof of concept, if env LIBC_NOSYSWRAPPERS is set, the libc timecounters
are turned off. Now I see lots of gettimeofday syscalls in ktrace again.
Is this better than switching to ltrace? Combined ktrace and ltrace output
is fairly messy, but it seems to work. Setting it up to trace just a few
functions and all the system calls is a bit more involved.
Index: init.c
===================================================================
RCS file: /home/cvs/src/lib/libc/dlfcn/init.c,v
retrieving revision 1.8
diff -u -p -r1.8 init.c
--- init.c 6 Jul 2020 13:33:05 -0000 1.8
+++ init.c 8 Jul 2020 08:13:07 -0000
@@ -114,6 +114,8 @@ _libc_preinit(int argc, char **argv, cha
_timekeep->tk_version != TK_VERSION)
_timekeep = NULL;
}
+ if (issetugid() == 0 && getenv("LIBC_NOSYSWRAPPERS"))
+ _timekeep = NULL;
break;
}
}
