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daa1284af3
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>
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| README | ||
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.