On 03/30/2015 06:02 AM, Dmitry V. Levin wrote: > On Sun, Mar 29, 2015 at 10:37:33PM -0400, Andrew Guertin wrote: >> When running the command >> `strace -e trace=file man` >> I don't get filenames in the output. For all other executables I've >> tried, strace works fine. Only man has problems. > > I suppose /usr/bin/man is installed as a privileged executable in your > system, and process_vm_readv syscall fails.
Looks like that's true: -r-xr-s--x 1 root man 53152 Oct 25 01:42 man In the changelog for 3af224c (the commit that implemented use of process_vm_readv) I see > This change uses it in umoven() and umovestr() functions if possible, > with fallback to old method if process_vm_readv() fails. > If it returns ENOSYS, we don't try to use it anymore, eliminating > overhead of trying it on older kernels. ...so it looks like that fallback broke in 9700592. ------------------------------------------------------------------------------ Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ Strace-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/strace-devel
