Arnaldo Carvalho de Melo daa1284af3 perf trace: Augment the 'open' syscall 'filename' arg ... As described in the previous cset, all we had to do was to touch the augmented_syscalls.c eBPF program, fire up 'perf trace' with that new eBPF script in system wide mode and wait for 'open' syscalls, in addition to 'openat' ones to see that it works: # perf trace -e tools/perf/examples/bpf/augmented_syscalls.c 0.000 StreamT~s #200/16150 openat(dfd: CWD, filename: /home/acme/.mozilla/firefox/fqxhj76d.default/prefs.js, flags: CREAT|EXCL|TRUNC|WRONLY, mode: IRUSR|IWUSR) 0.065 StreamT~s #200/16150 openat(dfd: CWD, filename: /home/acme/.mozilla/firefox/fqxhj76d.default/prefs-1.js, flags: CREAT|EXCL|TRUNC|WRONLY, mode: IRUSR|IWUSR) 0.435 StreamT~s #200/16150 openat(dfd: CWD, filename: /home/acme/.mozilla/firefox/fqxhj76d.default/prefs-1.js, flags: CREAT|TRUNC|WRONLY, mode: IRUSR|IWUSR) 1.875 perf/16772 openat(dfd: CWD, filename: /sys/kernel/debug/tracing/events/syscalls/sys_enter_openat/form) 1227.260 gnome-shell/1463 openat(dfd: CWD, filename: /proc/self/stat) 1227.397 gnome-shell/2125 openat(dfd: CWD, filename: /proc/self/stat) 7227.619 gnome-shell/1463 openat(dfd: CWD, filename: /proc/self/stat) 7227.661 gnome-shell/2125 openat(dfd: CWD, filename: /proc/self/stat) 10018.079 gnome-shell/1463 openat(dfd: CWD, filename: /proc/self/stat) 10018.514 perf/16772 openat(dfd: CWD, filename: /proc/1237/status) 10018.568 perf/16772 openat(dfd: CWD, filename: /proc/1237/status) 10022.409 gnome-shell/2125 openat(dfd: CWD, filename: /proc/self/stat) 10090.044 NetworkManager/1237 openat(dfd: CWD, filename: /proc/2125/stat) 10090.351 NetworkManager/1237 open(filename: /etc/passwd, flags: CLOEXEC) 10090.407 perf/16772 openat(dfd: CWD, filename: /sys/kernel/debug/tracing/events/syscalls/sys_enter_open/format) 10091.763 NetworkManager/1237 openat(dfd: CWD, filename: /proc/2125/stat) 10091.812 NetworkManager/1237 open(filename: /etc/passwd, flags: CLOEXEC) 10092.807 NetworkManager/1237 openat(dfd: CWD, filename: /proc/2125/stat) 10092.851 NetworkManager/1237 open(filename: /etc/passwd, flags: CLOEXEC) 10094.650 NetworkManager/1237 openat(dfd: CWD, filename: /proc/1463/stat) 10094.926 NetworkManager/1237 open(filename: /etc/passwd, flags: CLOEXEC) 10096.010 NetworkManager/1237 openat(dfd: CWD, filename: /proc/1463/stat) 10096.057 NetworkManager/1237 open(filename: /etc/passwd, flags: CLOEXEC) 10097.056 NetworkManager/1237 openat(dfd: CWD, filename: /proc/1463/stat) 10097.099 NetworkManager/1237 open(filename: /etc/passwd, flags: CLOEXEC) 13228.345 gnome-shell/1463 openat(dfd: CWD, filename: /proc/self/stat) 13232.734 gnome-shell/2125 openat(dfd: CWD, filename: /proc/self/stat) 15198.956 lighttpd/16748 open(filename: /proc/loadavg, mode: ISGID|IXOTH) ^C# It even catches 'perf' itself looking at the sys_enter_open and sys_enter_openat tracefs format dictionaries when it first finds them in the trace... :-) Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-upmogc57uatljr6el6u8537l@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>		2018-08-30 15:52:19 -03:00
..
5sec.c	perf bpf: Add probe() helper to reduce kprobes boilerplate	2018-05-15 14:31:24 -03:00
augmented_syscalls.c	perf trace: Augment the 'open' syscall 'filename' arg	2018-08-30 15:52:19 -03:00
empty.c	perf bpf: Add license(NAME) helper	2018-05-15 14:31:24 -03:00
hello.c	perf bpf: Add bpf/stdio.h wrapper to bpf_perf_event_output function	2018-08-08 15:55:55 -03:00
sys_enter_openat.c	perf bpf: Add 'syscall_enter' probe helper for syscall enter tracepoints	2018-08-08 15:55:44 -03:00