Arnaldo Carvalho de Melo <[email protected]> writes: > Em Wed, Aug 26, 2015 at 07:56:47PM +0300, Alexander Shishkin escreveu: >> So I hacked stuff a bit [1] to accomodate some of the above >> ideas. The below diff shows how these ideas integrate with perf. The >> rest is in my github tree. >> >> - this exterr implementation allows its users to add arbitrary >> information to the call site structures and also pretty print them on >> the way out; in the example, perf stores perf_event_attr field name >> that is the source of trouble; it's a string rather than offsetof(), >> because half of our event attribute is a bit field; >> - the "way out" doesn't have to be syscall return path (although in the >> example it is); >> - userspace can fetch the extended error reports via prctl() like you >> suggested above; >> - error codes are still passed around in the [-EXT_ERRNO..-MAX_ERRNO] >> range until they are passed to userspace (which is where ext_err_code() >> converts them back to traditional errno.h values). > > Hey, can we see the builtin-record.c patch please?
Should be on the way to your inbox. Cheers, -- Alex -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
