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5 years agoperf trace augmented_syscalls: Augment bind's 'myaddr' sockaddr arg
Arnaldo Carvalho de Melo [Tue, 28 Aug 2018 20:03:53 +0000 (17:03 -0300)]
perf trace augmented_syscalls: Augment bind's 'myaddr' sockaddr arg

One more, to reuse the augmented_sockaddr_syscall_enter() macro
introduced from the augmentation of connect's sockaddr arg, also to get
a subset of the struct arg augmentations done using the manual method,
before switching to something automatic, using tracefs's format file or,
even better, BTF containing the syscall args structs.

  # perf trace -e tools/perf/examples/bpf/augmented_syscalls.c
     0.000 sshd/11479 bind(fd: 3<socket:[170336]>, umyaddr: { .family: NETLINK }, addrlen: 12)
     1.752 sshd/11479 bind(fd: 3<socket:[170336]>, umyaddr: { .family: INET, port: 22, addr: 0.0.0.0 }, addrlen: 16)
     1.924 sshd/11479 bind(fd: 4<socket:[170338]>, umyaddr: { .family: INET6, port: 22, addr: :: }, addrlen: 28)
  ^C#

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-a2drqpahpmc7uwb3n3gj2plu@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf trace augmented_syscalls: Add augmented_sockaddr_syscall_enter()
Arnaldo Carvalho de Melo [Tue, 28 Aug 2018 19:39:11 +0000 (16:39 -0300)]
perf trace augmented_syscalls: Add augmented_sockaddr_syscall_enter()

From the one for 'connect', so that we can use it with sendto and others
that receive a 'struct sockaddr'.

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-8bdqv1q0ndcjl1nqns5r5je2@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf trace augmented_syscalls: Augment connect's 'sockaddr' arg
Arnaldo Carvalho de Melo [Tue, 28 Aug 2018 19:24:44 +0000 (16:24 -0300)]
perf trace augmented_syscalls: Augment connect's 'sockaddr' arg

As the first example of augmenting something other than a 'filename',
augment the 'struct sockaddr' argument for the 'connect' syscall:

  # perf trace -e tools/perf/examples/bpf/augmented_syscalls.c ssh -6 fedorapeople.org
     0.000 ssh/29669 connect(fd: 3, uservaddr: { .family: LOCAL, path: /var/run/nscd/socket }, addrlen: 110)
     0.042 ssh/29669 connect(fd: 3, uservaddr: { .family: LOCAL, path: /var/run/nscd/socket }, addrlen: 110)
     1.329 ssh/29669 connect(fd: 3, uservaddr: { .family: LOCAL, path: /var/run/nscd/socket }, addrlen: 110)
     1.362 ssh/29669 connect(fd: 3, uservaddr: { .family: LOCAL, path: /var/run/nscd/socket }, addrlen: 110)
     1.458 ssh/29669 connect(fd: 3, uservaddr: { .family: LOCAL, path: /var/run/nscd/socket }, addrlen: 110)
     1.478 ssh/29669 connect(fd: 3, uservaddr: { .family: LOCAL, path: /var/run/nscd/socket }, addrlen: 110)
     1.683 ssh/29669 connect(fd: 3<socket:[125942]>, uservaddr: { .family: INET, port: 53, addr: 192.168.43.1 }, addrlen: 16)
     4.710 ssh/29669 connect(fd: 3<socket:[125942]>, uservaddr: { .family: INET6, port: 22, addr: 2610:28:3090:3001:5054:ff:fea7:9474 }, addrlen: 28)
  root@fedorapeople.org: Permission denied (publickey).
  #

This is still just augmenting the syscalls:sys_enter_connect part, later
we'll wire this up to augment the enter+exit combo, like in the
tradicional 'perf trace' and 'strace' outputs.

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-s7l541cbiqb22ifio6z7dpf6@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf bpf: Add linux/socket.h to the headers accessible to bpf proggies
Arnaldo Carvalho de Melo [Wed, 29 Aug 2018 20:41:53 +0000 (17:41 -0300)]
perf bpf: Add linux/socket.h to the headers accessible to bpf proggies

So that we don't have to define sockaddr_storage in the
augmented_syscalls.c bpf example when hooking into syscalls needing it,
idea is to mimic the system headers. Eventually we probably need to have
sys/socket.h, etc.  Start by having at least linux/socket.h.

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-yhzarcvsjue8pgpvkjhqgioc@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf bpf: Give precedence to bpf header dir
Arnaldo Carvalho de Melo [Thu, 30 Aug 2018 02:53:22 +0000 (23:53 -0300)]
perf bpf: Give precedence to bpf header dir

I need to check the need for $KERNEL_INC_OPTIONS when building eBPF
restricted C programs, for now just give precedence to
$PERF_BPF_INC_OPTIONS so that we can get a linux/socket.h usable
in eBPF programs.

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-5z7qw529sdebrn9y1xxqw9hf@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf trace: Add a etcsnoop.c augmented syscalls eBPF utility
Arnaldo Carvalho de Melo [Tue, 21 Aug 2018 18:02:09 +0000 (15:02 -0300)]
perf trace: Add a etcsnoop.c augmented syscalls eBPF utility

We need to put common stuff into a separate header in tools/perf/include/bpf/
for these augmented syscalls, but I couldn't resist adding a etcsnoop.c tool,
combining augmented syscalls + filtering, that in the future will be passed
from 'perf trace''s command line, to use in building the eBPF program to do
that specific filtering at the source, inside the kernel:

  Running system wide: (hope there isn't any embarassing stuff here...  ;-) )

  # perf trace -e tools/perf/examples/bpf/etcsnoop.c
       0.000 sed/21878 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
    1741.473 cat/21883 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
    1741.892 cat/21883 openat(dfd: CWD, filename: /etc/passwd)
    1748.948 sed/21886 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
    1777.136 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1777.738 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1778.158 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1778.528 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1778.595 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1778.901 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1778.939 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1778.966 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1778.992 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.019 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.045 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.071 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.095 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.121 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.148 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.175 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.202 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.229 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.254 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.279 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.309 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.336 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.363 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.388 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.414 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.442 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.470 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.500 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.529 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.557 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.586 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.617 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.648 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.679 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.706 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.739 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.769 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.798 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.823 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.844 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.862 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.880 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.911 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.942 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1779.972 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1780.004 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
    1780.035 gvfs-udisks2-v/2302 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
   13059.154 NetworkManager/1237 open(filename: /etc/passwd, flags: CLOEXEC)
   13060.739 NetworkManager/1237 open(filename: /etc/passwd, flags: CLOEXEC)
   13061.990 NetworkManager/1237 open(filename: /etc/passwd, flags: CLOEXEC)
   13063.177 NetworkManager/1237 open(filename: /etc/passwd, flags: CLOEXEC)
   13064.265 NetworkManager/1237 open(filename: /etc/passwd, flags: CLOEXEC)
   13065.483 NetworkManager/1237 open(filename: /etc/passwd, flags: CLOEXEC)
   13067.383 NetworkManager/1237 open(filename: /etc/passwd, flags: CLOEXEC)
   13068.902 NetworkManager/1237 open(filename: /etc/passwd, flags: CLOEXEC)
   13069.922 NetworkManager/1237 open(filename: /etc/passwd, flags: CLOEXEC)
   13070.915 NetworkManager/1237 open(filename: /etc/passwd, flags: CLOEXEC)
   13072.612 NetworkManager/1237 open(filename: /etc/passwd, flags: CLOEXEC)
   13074.816 NetworkManager/1237 open(filename: /etc/passwd, flags: CLOEXEC)
   13077.343 NetworkManager/1237 open(filename: /etc/passwd, flags: CLOEXEC)
   13078.731 NetworkManager/1237 open(filename: /etc/passwd, flags: CLOEXEC)
   13559.064 DNS Res~er #22/21054 open(filename: /etc/hosts, flags: CLOEXEC)
   22419.522 sed/21896 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   24473.313 git/21900 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   24491.988 less/21901 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   24493.793 git/21901 openat(dfd: CWD, filename: /etc/sysless)
   24565.772 sed/21924 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   25878.752 git/21928 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   26075.666 git/21928 open(filename: /etc/localtime, flags: CLOEXEC)
   26075.565 less/21929 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   26076.060 less/21929 openat(dfd: CWD, filename: /etc/sysless)
   26346.395 sed/21932 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   26483.583 sed/21938 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   26954.890 sed/21944 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   27016.165 gsd-color/1762 openat(dfd: CWD, filename: /etc/localtime)
   27016.414 gsd-color/1762 openat(dfd: CWD, filename: /etc/localtime)
   27712.313 gsd-color/2408 openat(dfd: CWD, filename: /etc/localtime)
   27712.616 gsd-color/2408 openat(dfd: CWD, filename: /etc/localtime)
   27829.035 gnome-shell/2125 openat(dfd: CWD, filename: /etc/localtime)
   27829.368 gnome-shell/2125 openat(dfd: CWD, filename: /etc/localtime)
   27829.584 gnome-shell/2125 openat(dfd: CWD, filename: /etc/localtime)
   27829.800 gnome-shell/2125 openat(dfd: CWD, filename: /etc/localtime)
   27830.107 gnome-shell/2125 openat(dfd: CWD, filename: /etc/localtime)
   27830.521 gnome-shell/2125 openat(dfd: CWD, filename: /etc/localtime)
   27961.516 git/21948 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   27987.568 less/21949 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   27988.948 bash/21949 openat(dfd: CWD, filename: /etc/sysless)
   28043.536 sed/21972 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   28736.008 sed/21978 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   34882.664 git/21991 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   34882.664 sort/21990 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   34884.441 uniq/21992 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   35593.098 git/21997 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   35638.839 git/21997 openat(dfd: CWD, filename: /etc/gitattributes)
   35702.851 sed/22000 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   36076.039 sed/22006 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   37569.049 git/22014 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   37673.712 git/22014 open(filename: /etc/localtime, flags: CLOEXEC)
   37781.710 vim/22040 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   37783.667 git/22040 openat(dfd: CWD, filename: /etc/vimrc)
   37792.394 git/22040 open(filename: /etc/nsswitch.conf, flags: CLOEXEC)
   37792.436 git/22040 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   37792.580 git/22040 open(filename: /etc/passwd, flags: CLOEXEC)
   43893.625 DNS Res~er #23/21365 open(filename: /etc/hosts, flags: CLOEXEC)
   48060.409 nm-dhcp-helper/22044 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   48071.745 systemd/1 openat(dfd: CWD, filename: /etc/systemd/system/dbus-org.freedesktop.nm-dispatcher.service, flags: CLOEXEC|NOFOLLOW|NOCTTY)
   48082.780 nm-dispatcher/22049 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   48111.418 systemd/22049 open(filename: /etc/NetworkManager/dispatcher.d, flags: CLOEXEC|DIRECTORY|NONBLOCK)
   48111.904 systemd/22049 open(filename: /etc/localtime, flags: CLOEXEC)
   48118.357 00-netreport/22052 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   48119.668 systemd/22052 open(filename: /etc/nsswitch.conf, flags: CLOEXEC)
   48119.762 systemd/22052 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   48119.887 systemd/22052 open(filename: /etc/passwd, flags: CLOEXEC)
   48120.025 systemd/22052 openat(dfd: CWD, filename: /etc/NetworkManager/dispatcher.d/00-netreport)
   48124.144 hostname/22054 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   48125.492 systemd/22052 openat(dfd: CWD, filename: /etc/init.d/functions)
   48127.253 systemd/22052 openat(dfd: CWD, filename: /etc/profile.d/lang.sh)
   48127.388 systemd/22052 openat(dfd: CWD, filename: /etc/locale.conf)
   48137.749 cat/22056 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   48143.519 04-iscsi/22058 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   48144.438 04-iscsi/22058 open(filename: /etc/nsswitch.conf, flags: CLOEXEC)
   48144.478 04-iscsi/22058 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   48144.577 04-iscsi/22058 open(filename: /etc/passwd, flags: CLOEXEC)
   48144.819 04-iscsi/22058 openat(dfd: CWD, filename: /etc/NetworkManager/dispatcher.d/04-iscsi)
   48145.620 10-ifcfg-rh-ro/22059 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   48146.169 systemd/22059 open(filename: /etc/nsswitch.conf, flags: CLOEXEC)
   48146.207 systemd/22059 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   48146.287 systemd/22059 open(filename: /etc/passwd, flags: CLOEXEC)
   48146.387 systemd/22059 openat(dfd: CWD, filename: /etc/NetworkManager/dispatcher.d/10-ifcfg-rh-routes.sh)
   48147.215 11-dhclient/22060 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   48147.787 11-dhclient/22060 open(filename: /etc/nsswitch.conf, flags: CLOEXEC)
   48147.813 11-dhclient/22060 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   48147.929 11-dhclient/22060 open(filename: /etc/passwd, flags: CLOEXEC)
   48148.016 11-dhclient/22060 openat(dfd: CWD, filename: /etc/NetworkManager/dispatcher.d/11-dhclient)
   48148.906 grep/22063 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   48151.165 11-dhclient/22060 openat(dfd: CWD, filename: /etc/sysconfig/network)
   48151.560 11-dhclient/22060 open(filename: /etc/dhcp/dhclient.d/, flags: CLOEXEC|DIRECTORY|NONBLOCK)
   48151.704 11-dhclient/22060 openat(dfd: CWD, filename: /etc/dhcp/dhclient.d/chrony.sh)
   48153.593 20-chrony/22065 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   48154.695 20-chrony/22065 open(filename: /etc/nsswitch.conf, flags: CLOEXEC)
   48154.756 20-chrony/22065 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   48154.914 20-chrony/22065 open(filename: /etc/passwd, flags: CLOEXEC)
   48155.067 20-chrony/22065 openat(dfd: CWD, filename: /etc/NetworkManager/dispatcher.d/20-chrony)
   48156.962 25-polipo/22066 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   48157.824 systemd/22066 open(filename: /etc/nsswitch.conf, flags: CLOEXEC)
   48157.866 systemd/22066 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
   48157.981 systemd/22066 open(filename: /etc/passwd, flags: CLOEXEC)
   48158.090 systemd/22066 openat(dfd: CWD, filename: /etc/NetworkManager/dispatcher.d/25-polipo)
   48533.616 gsd-housekeepi/2412 openat(dfd: CWD, filename: /etc/fstab, flags: CLOEXEC)
   87122.021 gsd-color/1762 openat(dfd: CWD, filename: /etc/localtime)
   87122.146 gsd-color/1762 openat(dfd: CWD, filename: /etc/localtime)
   87825.582 gsd-color/2408 openat(dfd: CWD, filename: /etc/localtime)
   87825.844 gsd-color/2408 openat(dfd: CWD, filename: /etc/localtime)
   87829.524 gnome-shell/2125 openat(dfd: CWD, filename: /etc/localtime)
   87830.531 gnome-shell/2125 openat(dfd: CWD, filename: /etc/localtime)
   87831.288 gnome-shell/2125 openat(dfd: CWD, filename: /etc/localtime)
   87832.011 gnome-shell/2125 openat(dfd: CWD, filename: /etc/localtime)
   87832.672 gnome-shell/2125 openat(dfd: CWD, filename: /etc/localtime)
   87833.276 gnome-shell/2125 openat(dfd: CWD, filename: /etc/localtime)
   ^C#

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-0o770jvdcy04ee6vhv6v471m@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf trace: Augment 'newstat' (aka 'stat') filename ptr
Arnaldo Carvalho de Melo [Tue, 21 Aug 2018 16:55:50 +0000 (13:55 -0300)]
perf trace: Augment 'newstat' (aka 'stat') filename ptr

This one will need some more work, that 'statbuf' pointer requires a
beautifier in 'perf trace'.

  # perf trace -e tools/perf/examples/bpf/augmented_syscalls.c
     0.000 weechat/3596 stat(filename: /etc/localtime, statbuf: 0x7ffd87d11f60)
     0.186 perf/29818 openat(dfd: CWD, filename: /sys/kernel/debug/tracing/events/syscalls/sys_enter_stat/format)
     0.279 perf/29818 openat(dfd: CWD, filename: /sys/kernel/debug/tracing/events/syscalls/sys_enter_newstat/for)
     0.670 perf/29818 openat(dfd: CWD, filename: /sys/kernel/debug/tracing/events/syscalls/sys_enter_openat/form)
    60.805 DNS Res~er #20/21308 stat(filename: /etc/resolv.conf, statbuf: 0x7ffa733fe4a0)
    60.836 DNS Res~er #20/21308 open(filename: /etc/hosts, flags: CLOEXEC)
    60.931 perf/29818 openat(dfd: CWD, filename: /sys/kernel/debug/tracing/events/syscalls/sys_enter_open/format)
   607.070 DNS Res~er #21/29812 stat(filename: /etc/resolv.conf, statbuf: 0x7ffa5e1fe3f0)
   607.098 DNS Res~er #21/29812 open(filename: /etc/hosts, flags: CLOEXEC)
   999.336 weechat/3596 stat(filename: /etc/localtime, statbuf: 0x7ffd87d11f60)
^C#

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-4lhabe7m4uzo76lnqpyfmnvk@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf trace: Introduce augmented_filename_syscall_enter() declarator
Arnaldo Carvalho de Melo [Tue, 21 Aug 2018 16:44:49 +0000 (13:44 -0300)]
perf trace: Introduce augmented_filename_syscall_enter() declarator

Helping with tons of boilerplate for syscalls that only want to augment
a filename. Now supporting one such syscall is just a matter of
declaring its arguments struct + using:

  augmented_filename_syscall_enter(openat);

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-ls7ojdseu8fxw7fvj77ejpao@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf trace: Augment inotify_add_watch pathname syscall arg
Arnaldo Carvalho de Melo [Tue, 21 Aug 2018 16:21:36 +0000 (13:21 -0300)]
perf trace: Augment inotify_add_watch pathname syscall arg

Again, just changing tools/perf/examples/bpf/augmented_syscalls.c, that
is starting to have too much boilerplate, some macro will come to the
rescue.

  # perf trace -e tools/perf/examples/bpf/augmented_syscalls.c
     0.000 gmain/2590 inotify_add_watch(fd: 3<anon_inode:inotify>, pathname: /var/cache/app-info/yaml, mask: 16789454)
     0.023 gmain/2590 inotify_add_watch(fd: 3<anon_inode:inotify>, pathname: /var/lib/app-info/xmls, mask: 16789454)
     0.028 gmain/2590 inotify_add_watch(fd: 3<anon_inode:inotify>, pathname: /var/lib/app-info/yaml, mask: 16789454)
     0.032 gmain/2590 inotify_add_watch(fd: 3<anon_inode:inotify>, pathname: /usr/share/app-info/yaml, mask: 16789454)
     0.039 gmain/2590 inotify_add_watch(fd: 3<anon_inode:inotify>, pathname: /usr/local/share/app-info/xmls, mask: 16789454)
     0.045 gmain/2590 inotify_add_watch(fd: 3<anon_inode:inotify>, pathname: /usr/local/share/app-info/yaml, mask: 16789454)
     0.049 gmain/2590 inotify_add_watch(fd: 3<anon_inode:inotify>, pathname: /home/acme/.local/share/app-info/yaml, mask: 16789454)
     0.056 gmain/2590 inotify_add_watch(fd: 3<anon_inode:inotify>, pathname: , mask: 16789454)
     0.010 gmain/2245 inotify_add_watch(fd: 7<anon_inode:inotify>, pathname: /home/acme/~, mask: 16789454)
     0.087 perf/20116 openat(dfd: CWD, filename: /sys/kernel/debug/tracing/events/syscalls/sys_enter_inotify_add)
     0.436 perf/20116 openat(dfd: CWD, filename: /sys/kernel/debug/tracing/events/syscalls/sys_enter_openat/form)
    56.042 gmain/2791 inotify_add_watch(fd: 4<anon_inode:inotify>, pathname: /var/lib/fwupd/remotes.d/lvfs-testing, mask: 16789454)
   113.986 gmain/1721 inotify_add_watch(fd: 3<anon_inode:inotify>, pathname: /var/lib/gdm/~, mask: 16789454)
  3777.265 gsd-color/2408 openat(dfd: CWD, filename: /etc/localtime)
  3777.550 gsd-color/2408 openat(dfd: CWD, filename: /etc/localtime)
^C[root@jouet perf]#

Still not combining raw_syscalls:sys_enter + raw_syscalls:sys_exit, to
get it strace-like, but that probably will come very naturally with some
more wiring up...

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-ol83juin2cht9vzquynec5hz@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf trace: Augment the 'open' syscall 'filename' arg
Arnaldo Carvalho de Melo [Tue, 21 Aug 2018 15:20:06 +0000 (12:20 -0300)]
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>
5 years agoperf trace: Use the augmented filename, expanding syscall enter pointers
Arnaldo Carvalho de Melo [Tue, 21 Aug 2018 15:00:39 +0000 (12:00 -0300)]
perf trace: Use the augmented filename, expanding syscall enter pointers

This is the final touch in showing how a syscall argument beautifier can
access the augmented args put in place by the
tools/perf/examples/bpf/augmented_syscalls.c eBPF script, right after
the regular raw syscall args, i.e. the up to 6 long integer values in
the syscall interface.

With this we are able to show the 'openat' syscall arg, now with up to
64 bytes, but in time this will be configurable, just like with the
'strace -s strsize' argument, from 'strace''s man page:

  -s strsize  Specify the maximum string size to print (the default is 32).

This actually is the maximum string to _collect_ and store in the ring
buffer, not just print.

Before:

  # perf trace -e tools/perf/examples/bpf/augmented_syscalls.c,openat cat /etc/passwd > /dev/null
     0.000 (         ): cat/9658 openat(dfd: CWD, filename: 0x6626eda8, flags: CLOEXEC)
     0.017 ( 0.007 ms): cat/9658 openat(dfd: CWD, filename: 0x6626eda8, flags: CLOEXEC) = 3
     0.049 (         ): cat/9658 openat(dfd: CWD, filename: 0x66476ce0, flags: CLOEXEC)
     0.051 ( 0.007 ms): cat/9658 openat(dfd: CWD, filename: 0x66476ce0, flags: CLOEXEC) = 3
     0.377 (         ): cat/9658 openat(dfd: CWD, filename: 0x1e8f806b)
     0.379 ( 0.005 ms): cat/9658 openat(dfd: CWD, filename: 0x1e8f806b) = 3
  #

After:

  # perf trace -e tools/perf/examples/bpf/augmented_syscalls.c,openat cat /etc/passwd > /dev/null
     0.000 (         ): cat/11966 openat(dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC)
     0.006 ( 0.006 ms): cat/11966 openat(dfd: CWD, filename: 0x4bfdcda8, flags: CLOEXEC) = 3
     0.034 (         ): cat/11966 openat(dfd: CWD, filename: /lib64/libc.so.6, flags: CLOEXEC)
     0.036 ( 0.008 ms): cat/11966 openat(dfd: CWD, filename: 0x4c1e4ce0, flags: CLOEXEC) = 3
     0.375 (         ): cat/11966 openat(dfd: CWD, filename: /etc/passwd)
     0.377 ( 0.005 ms): cat/11966 openat(dfd: CWD, filename: 0xe87906b) = 3
  #

This cset should show all the aspects of establishing a protocol between
an eBPF syscall arg augmenter program, tools/perf/examples/bpf/augmented_syscalls.c and
a 'perf trace' beautifier, the one associated with all 'char *' point
syscall args with names that can heuristically be associated with
filenames.

Now to wire up 'open' to show a second syscall using this scheme, all we
have to do now is to change tools/perf/examples/bpf/augmented_syscalls.c,
as 'perf trace' will notice that the perf_sample.raw_size is more than
what is expected for a particular syscall payload as defined by its
tracefs format file and will then use the augmented payload in the
'filename' syscall arg beautifier.

The same protocol will be used for structs such as 'struct sockaddr *',
'struct pollfd', etc, with additions for handling arrays.

This will all be done under the hood when 'perf trace' realizes the
system has the necessary components, and also can be done by providing
a precompiled augmented_syscalls.c eBPF ELF object.

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-gj9kqb61wo7m3shtpzercbcr@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf trace: Show comm/tid for augmented_syscalls
Arnaldo Carvalho de Melo [Tue, 21 Aug 2018 14:47:44 +0000 (11:47 -0300)]
perf trace: Show comm/tid for augmented_syscalls

To get us a bit more like the sys_enter + sys_exit combo:

  # perf trace -e tools/perf/examples/bpf/augmented_syscalls.c,openat cat /etc/passwd > /dev/null
     0.000 (         ): openat(dfd: CWD, filename: 0x31b6dda8, flags: CLOEXEC)
     0.009 ( 0.009 ms): cat/3619 openat(dfd: CWD, filename: 0x31b6dda8, flags: CLOEXEC) = 3
     0.051 (         ): openat(dfd: CWD, filename: 0x31d75ce0, flags: CLOEXEC)
     0.054 ( 0.010 ms): cat/3619 openat(dfd: CWD, filename: 0x31d75ce0, flags: CLOEXEC) = 3
     0.539 (         ): openat(dfd: CWD, filename: 0xca71506b)
     0.543 ( 0.115 ms): cat/3619 openat(dfd: CWD, filename: 0xca71506b) = 3
  #

After:

  # perf trace -e tools/perf/examples/bpf/augmented_syscalls.c,openat cat /etc/passwd > /dev/null
     0.000 (         ): cat/4919 openat(dfd: CWD, filename: 0xc8358da8, flags: CLOEXEC)
     0.007 ( 0.005 ms): cat/4919 openat(dfd: CWD, filename: 0xc8358da8, flags: CLOEXEC) = 3
     0.032 (         ): cat/4919 openat(dfd: CWD, filename: 0xc8560ce0, flags: CLOEXEC)
     0.033 ( 0.006 ms): cat/4919 openat(dfd: CWD, filename: 0xc8560ce0, flags: CLOEXEC) = 3
     0.301 (         ): cat/4919 openat(dfd: CWD, filename: 0x91fa306b)
     0.304 ( 0.004 ms): cat/4919 openat(dfd: CWD, filename: 0x91fa306b) = 3
  #

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-6w8ytyo5y655a1hsyfpfily6@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf trace: Extract the comm/tid printing for syscall enter
Arnaldo Carvalho de Melo [Tue, 21 Aug 2018 14:40:09 +0000 (11:40 -0300)]
perf trace: Extract the comm/tid printing for syscall enter

Will be used with augmented syscalls, where we haven't transitioned
completely to combining sys_enter_FOO with sys_exit_FOO, so we'll go
as far as having it similar to the end result, strace like, as possible.

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-canomaoiybkswwnhj69u9ae4@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf trace: Print the syscall name for augmented_syscalls
Arnaldo Carvalho de Melo [Tue, 21 Aug 2018 14:44:23 +0000 (11:44 -0300)]
perf trace: Print the syscall name for augmented_syscalls

Since we copy all the payload for raw_syscalls:sys_enter plus add
expanded pointers, we can use the syscall id to get its name, etc:

  # grep 'field:.* id' /sys/kernel/debug/tracing/events/raw_syscalls/sys_enter/format
field:long id; offset:8; size:8; signed:1;
  #

Before:

  # perf trace -e tools/perf/examples/bpf/augmented_syscalls.c,openat cat /etc/passwd > /dev/null
     0.000 (         ): __augmented_syscalls__:dfd: CWD, filename: 0xec9f9da8, flags: CLOEXEC
     0.006 ( 0.006 ms): cat/2395 openat(dfd: CWD, filename: 0xec9f9da8, flags: CLOEXEC) = 3
     0.041 (         ): __augmented_syscalls__:dfd: CWD, filename: 0xecc01ce0, flags: CLOEXEC
     0.042 ( 0.007 ms): cat/2395 openat(dfd: CWD, filename: 0xecc01ce0, flags: CLOEXEC) = 3
     0.376 (         ): __augmented_syscalls__:dfd: CWD, filename: 0xac0a806b
     0.379 ( 0.006 ms): cat/2395 openat(dfd: CWD, filename: 0xac0a806b) = 3
  #

After:

  # perf trace -e tools/perf/examples/bpf/augmented_syscalls.c,openat cat /etc/passwd > /dev/null
     0.000 (         ): openat(dfd: CWD, filename: 0x31b6dda8, flags: CLOEXEC)
     0.009 ( 0.009 ms): cat/3619 openat(dfd: CWD, filename: 0x31b6dda8, flags: CLOEXEC) = 3
     0.051 (         ): openat(dfd: CWD, filename: 0x31d75ce0, flags: CLOEXEC)
     0.054 ( 0.010 ms): cat/3619 openat(dfd: CWD, filename: 0x31d75ce0, flags: CLOEXEC) = 3
     0.539 (         ): openat(dfd: CWD, filename: 0xca71506b)
     0.543 ( 0.115 ms): cat/3619 openat(dfd: CWD, filename: 0xca71506b) = 3
  #

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-epz6y9i0eavmerc5ha98t7gn@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf trace: Make the augmented_syscalls filter out the tracepoint event
Arnaldo Carvalho de Melo [Tue, 21 Aug 2018 14:14:15 +0000 (11:14 -0300)]
perf trace: Make the augmented_syscalls filter out the tracepoint event

When we attach a eBPF object to a tracepoint, if we return 1, then that
tracepoint will be stored in the perf's ring buffer. In the
augmented_syscalls.c case we want to just attach and _override_ the
tracepoint payload with an augmented, extended one.

In this example, tools/perf/examples/bpf/augmented_syscalls.c, we are
attaching to the 'openat' syscall, and adding, after the
syscalls:sys_enter_openat usual payload as defined by
/sys/kernel/debug/tracing/events/syscalls/sys_enter_openat/format, a
snapshot of its sole pointer arg:

  # grep 'field:.*\*' /sys/kernel/debug/tracing/events/syscalls/sys_enter_openat/format
field:const char * filename; offset:24; size:8; signed:0;
  #

For now this is not being considered, the next csets will make use of
it, but as this is overriding the syscall tracepoint enter, we don't
want that event appearing on the ring buffer, just our synthesized one.

Before:

  # perf trace -e ~acme/git/perf/tools/perf/examples/bpf/augmented_syscalls.c,openat cat /etc/passwd > /dev/null
     0.000 (         ): __augmented_syscalls__:dfd: CWD, filename: /etc/ld.so.cache, flags: CLOEXEC
     0.006 (         ): syscalls:sys_enter_openat:dfd: CWD, filename: , flags: CLOEXEC
     0.007 ( 0.004 ms): cat/24044 openat(dfd: CWD, filename: 0x216dda8, flags: CLOEXEC                  ) = 3
     0.028 (         ): __augmented_syscalls__:dfd: CWD, filename: /lib64/libc.so.6, flags: CLOEXEC
     0.030 (         ): syscalls:sys_enter_openat:dfd: CWD, filename: , flags: CLOEXEC
     0.031 ( 0.006 ms): cat/24044 openat(dfd: CWD, filename: 0x2375ce0, flags: CLOEXEC                  ) = 3
     0.291 (         ): __augmented_syscalls__:dfd: CWD, filename: /etc/passwd
     0.293 (         ): syscalls:sys_enter_openat:dfd: CWD, filename:
     0.294 ( 0.004 ms): cat/24044 openat(dfd: CWD, filename: 0x637db06b                                 ) = 3
  #

After:

  # perf trace -e ~acme/git/perf/tools/perf/examples/bpf/augmented_syscalls.c,openat cat /etc/passwd > /dev/null
     0.000 (         ): __augmented_syscalls__:dfd: CWD, filename: 0x9c6a1da8, flags: CLOEXEC
     0.005 ( 0.015 ms): cat/27341 openat(dfd: CWD, filename: 0x9c6a1da8, flags: CLOEXEC                 ) = 3
     0.040 (         ): __augmented_syscalls__:dfd: CWD, filename: 0x9c8a9ce0, flags: CLOEXEC
     0.041 ( 0.006 ms): cat/27341 openat(dfd: CWD, filename: 0x9c8a9ce0, flags: CLOEXEC                 ) = 3
     0.294 (         ): __augmented_syscalls__:dfd: CWD, filename: 0x482a706b
     0.296 ( 0.067 ms): cat/27341 openat(dfd: CWD, filename: 0x482a706b                                 ) = 3
  #

Now lets replace that __augmented_syscalls__ name with the syscall name,
using:

  # grep 'field:.*syscall_nr' /sys/kernel/debug/tracing/events/syscalls/sys_enter_openat/format
field:int __syscall_nr; offset:8; size:4; signed:1;
  #

That the synthesized payload has exactly where the syscall enter
tracepoint puts it.

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-og4r9k87mzp9hv7el046idmd@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf trace: Pass augmented args to the arg formatters when available
Arnaldo Carvalho de Melo [Mon, 20 Aug 2018 20:58:17 +0000 (17:58 -0300)]
perf trace: Pass augmented args to the arg formatters when available

If the tracepoint payload is bigger than what a syscall expected from
what is in its format file in tracefs, then that will be used as
augmented args, i.e. the expansion of syscall arg pointers, with things
like a filename, structs, etc.

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-bsbqx7xi2ot4q9bf570f7tqs@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf annotate: Fix parsing aarch64 branch instructions after objdump update
Kim Phillips [Mon, 27 Aug 2018 17:53:40 +0000 (12:53 -0500)]
perf annotate: Fix parsing aarch64 branch instructions after objdump update

Starting with binutils 2.28, aarch64 objdump adds comments to the
disassembly output to show the alternative names of a condition code
[1].

It is assumed that commas in objdump comments could occur in other
arches now or in the future, so this fix is arch-independent.

The fix could have been done with arm64 specific jump__parse and
jump__scnprintf functions, but the jump__scnprintf instruction would
have to have its comment character be a literal, since the scnprintf
functions cannot receive a struct arch easily.

This inconvenience also applies to the generic jump__scnprintf, which is
why we add a raw_comment pointer to struct ins_operands, so the __parse
function assigns it to be re-used by its corresponding __scnprintf
function.

Example differences in 'perf annotate --stdio2' output on an aarch64
perf.data file:

BEFORE: â†’ b.cs   ffff200008133d1c <unwind_frame+0x18c>  // b.hs, dffff7ecc47b
AFTER : â†“ b.cs   18c

BEFORE: â†’ b.cc   ffff200008d8d9cc <get_alloc_profile+0x31c>  // b.lo, b.ul, dffff727295b
AFTER : â†“ b.cc   31c

The branch target labels 18c and 31c also now appear in the output:

BEFORE:        add    x26, x29, #0x80
AFTER : 18c:   add    x26, x29, #0x80

BEFORE:        add    x21, x21, #0x8
AFTER : 31c:   add    x21, x21, #0x8

The Fixes: tag below is added so stable branches will get the update; it
doesn't necessarily mean that commit was broken at the time, rather it
didn't withstand the aarch64 objdump update.

Tested no difference in output for sample x86_64, power arch perf.data files.

[1] https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=commit;h=bb7eff5206e4795ac79c177a80fe9f4630aaf730

Signed-off-by: Kim Phillips <kim.phillips@arm.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Anton Blanchard <anton@samba.org>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Taeung Song <treeze.taeung@gmail.com>
Cc: linux-arm-kernel@lists.infradead.org
Fixes: b13bbeee5ee6 ("perf annotate: Fix branch instruction with multiple operands")
Link: http://lkml.kernel.org/r/20180827125340.a2f7e291901d17cea05daba4@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf probe powerpc: Ignore SyS symbols irrespective of endianness
Sandipan Das [Tue, 28 Aug 2018 09:08:48 +0000 (14:38 +0530)]
perf probe powerpc: Ignore SyS symbols irrespective of endianness

This makes sure that the SyS symbols are ignored for any powerpc system,
not just the big endian ones.

Reported-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Sandipan Das <sandipan@linux.ibm.com>
Reviewed-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Acked-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Ravi Bangoria <ravi.bangoria@linux.ibm.com>
Fixes: fb6d59423115 ("perf probe ppc: Use the right prefix when ignoring SyS symbols on ppc")
Link: http://lkml.kernel.org/r/20180828090848.1914-1-sandipan@linux.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf event-parse: Use fixed size string for comms
Chris Phlipot [Thu, 30 Aug 2018 02:19:50 +0000 (19:19 -0700)]
perf event-parse: Use fixed size string for comms

Some implementations of libc do not support the 'm' width modifier as
part of the scanf string format specifier. This can cause the parsing to
fail.  Since the parser never checks if the scanf parsing was
successesful, this can result in a crash.

Change the comm string to be allocated as a fixed size instead of
dynamically using 'm' scanf width modifier. This can be safely done
since comm size is limited to 16 bytes by TASK_COMM_LEN within the
kernel.

This change prevents perf from crashing when linked against bionic as
well as reduces the total number of heap allocations and frees invoked
while accomplishing the same task.

Signed-off-by: Chris Phlipot <cphlipot0@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180830021950.15563-1-cphlipot0@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf util: Fix bad memory access in trace info.
Chris Phlipot [Wed, 29 Aug 2018 06:19:54 +0000 (23:19 -0700)]
perf util: Fix bad memory access in trace info.

In the write to the output_fd in the error condition of
record_saved_cmdline(), we are writing 8 bytes from a memory location on
the stack that contains a primitive that is only 4 bytes in size.
Change the primitive to 8 bytes in size to match the size of the write
in order to avoid reading unknown memory from the stack.

Signed-off-by: Chris Phlipot <cphlipot0@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180829061954.18871-1-cphlipot0@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf tools: Streamline bpf examples and headers installation
Arnaldo Carvalho de Melo [Wed, 29 Aug 2018 20:31:52 +0000 (17:31 -0300)]
perf tools: Streamline bpf examples and headers installation

We were emitting 4 lines, two of them misleading:

  make: Entering directory '/home/acme/git/perf/tools/perf'
  <SNIP>
    INSTALL  lib
    INSTALL  include/bpf
    INSTALL  lib
    INSTALL  examples/bpf
  <SNIP>
  make: Leaving directory '/home/acme/git/perf/tools/perf'

Make it more compact by showing just two lines:

  make: Entering directory '/home/acme/git/perf/tools/perf'
    INSTALL  bpf-headers
    INSTALL  bpf-examples
  make: Leaving directory '/home/acme/git/perf/tools/perf'

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-0nvkyciqdkrgy829lony5925@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf evsel: Fix potential null pointer dereference in perf_evsel__new_idx()
Hisao Tanabe [Fri, 24 Aug 2018 15:45:56 +0000 (00:45 +0900)]
perf evsel: Fix potential null pointer dereference in perf_evsel__new_idx()

If evsel is NULL, we should return NULL to avoid a NULL pointer
dereference a bit later in the code.

Signed-off-by: Hisao Tanabe <xtanabe@gmail.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Wang Nan <wangnan0@huawei.com>
Fixes: 03e0a7df3efd ("perf tools: Introduce bpf-output event")
LPU-Reference: 20180824154556.23428-1-xtanabe@gmail.com
Link: https://lkml.kernel.org/n/tip-e5plzjhx6595a5yjaf22jss3@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf arm64: Fix include path for asm-generic/unistd.h
Kim Phillips [Mon, 6 Aug 2018 22:28:00 +0000 (17:28 -0500)]
perf arm64: Fix include path for asm-generic/unistd.h

The new syscall table support for arm64 mistakenly used the system's
asm-generic/unistd.h file when processing the
tools/arch/arm64/include/uapi/asm/unistd.h file's include directive:

#include <asm-generic/unistd.h>

See "Committer notes" section of commit 2b5882435606 "perf arm64:
Generate system call table from asm/unistd.h" for more details.

This patch removes the committer's temporary workaround, and instructs
the host compiler to search the build tree's include path for the right
copy of the unistd.h file, instead of the one on the system's
/usr/include path.

It thus fixes the committer's test that cross-builds an arm64 perf on an
x86 platform running Ubuntu 14.04.5 LTS with an old toolchain:

$ tools/perf/arch/arm64/entry/syscalls/mksyscalltbl /gcc-linaro-5.4.1-2017.05-x86_64_aarch64-linux-gnu/bin/aarch64-linux-gnu-gcc gcc `pwd`/tools tools/arch/arm64/include/uapi/asm/unistd.h | grep bpf
[280] = "bpf",

Signed-off-by: Kim Phillips <kim.phillips@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Cc: Thomas Richter <tmricht@linux.vnet.ibm.com>
Fixes: 2b5882435606 ("perf arm64: Generate system call table from asm/unistd.h")
Link: http://lkml.kernel.org/r/20180806172800.bbcec3cfcc51e2facc978bf2@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf/hw_breakpoint: Simplify breakpoint enable in perf_event_modify_breakpoint
Jiri Olsa [Mon, 27 Aug 2018 09:12:28 +0000 (11:12 +0200)]
perf/hw_breakpoint: Simplify breakpoint enable in perf_event_modify_breakpoint

We can safely enable the breakpoint back for both the fail and success
paths by checking only the bp->attr.disabled, which either holds the new
'requested' disabled state or the original breakpoint state.

Committer testing:

At the end of the series, the 'perf test' entry introduced as the first
patch now runs to completion without finding the fixed issues:

  # perf test "bp modify"
  62: x86 bp modify                                         : Ok
  #

In verbose mode:

  # perf test -v "bp modify"
  62: x86 bp modify                                         :
  --- start ---
  test child forked, pid 5161
  rip 5950a0, bp_1 0x5950a0
  in bp_1
  rip 5950a0, bp_1 0x5950a0
  in bp_1
  test child finished with 0
  ---- end ----
  x86 bp modify: Ok

Suggested-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Milind Chabbi <chabbi.milind@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180827091228.2878-6-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf/hw_breakpoint: Enable breakpoint in modify_user_hw_breakpoint
Jiri Olsa [Mon, 27 Aug 2018 09:12:27 +0000 (11:12 +0200)]
perf/hw_breakpoint: Enable breakpoint in modify_user_hw_breakpoint

Currently we enable the breakpoint back only if the breakpoint
modification was successful. If it fails we can leave the breakpoint in
disabled state with attr->disabled == 0.

We can safely enable the breakpoint back for both the fail and success
paths by checking the bp->attr.disabled, which either holds the new
'requested' disabled state or the original breakpoint state.

Suggested-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Frederic Weisbecker <frederic@kernel.org>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Milind Chabbi <chabbi.milind@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180827091228.2878-5-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf/hw_breakpoint: Remove superfluous bp->attr.disabled = 0
Jiri Olsa [Mon, 27 Aug 2018 09:12:26 +0000 (11:12 +0200)]
perf/hw_breakpoint: Remove superfluous bp->attr.disabled = 0

Once the breakpoint was succesfully modified, the attr->disabled value
is in bp->attr.disabled. So there's no reason to set it again, removing
that.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Frederic Weisbecker <frederic@kernel.org>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Milind Chabbi <chabbi.milind@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180827091228.2878-4-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf/hw_breakpoint: Modify breakpoint even if the new attr has disabled set
Jiri Olsa [Mon, 27 Aug 2018 09:12:25 +0000 (11:12 +0200)]
perf/hw_breakpoint: Modify breakpoint even if the new attr has disabled set

We need to change the breakpoint even if the attr with new fields has
disabled set to true.

Current code prevents following user code to change the breakpoint
address:

  ptrace(PTRACE_POKEUSER, child, offsetof(struct user, u_debugreg[0]), addr_1)
  ptrace(PTRACE_POKEUSER, child, offsetof(struct user, u_debugreg[0]), addr_2)
  ptrace(PTRACE_POKEUSER, child, offsetof(struct user, u_debugreg[7]), dr7)

The first PTRACE_POKEUSER creates the breakpoint with attr.disabled set
to true:

  ptrace_set_breakpoint_addr(nr = 0)
    struct perf_event *bp = t->ptrace_bps[nr];

    ptrace_register_breakpoint(..., disabled = true)
      ptrace_fill_bp_fields(..., disabled)
      register_user_hw_breakpoint

So the second PTRACE_POKEUSER will be omitted:

  ptrace_set_breakpoint_addr(nr = 0)
    struct perf_event *bp = t->ptrace_bps[nr];
    struct perf_event_attr attr = bp->attr;

    modify_user_hw_breakpoint(bp, &attr)
      if (!attr->disabled)
        modify_user_hw_breakpoint_check

Reported-by: Milind Chabbi <chabbi.milind@gmail.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Frederic Weisbecker <frederic@kernel.org>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180827091228.2878-3-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf tests: Add breakpoint modify tests
Jiri Olsa [Mon, 27 Aug 2018 09:12:24 +0000 (11:12 +0200)]
perf tests: Add breakpoint modify tests

Adding to tests that aims on kernel breakpoint modification bugs.

First test creates HW breakpoint, tries to change it and checks it was
properly changed. It aims on kernel issue that prevents HW breakpoint to
be changed via ptrace interface.

The first test forks, the child sets itself as ptrace tracee and waits
in signal for parent to trace it, then it calls bp_1 and quits.

The parent does following steps:

 - creates a new breakpoint (id 0) for bp_2 function
 - changes that breakpoint to bp_1 function
 - waits for the breakpoint to hit and checks
   it has proper rip of bp_1 function

This test aims on an issue in kernel preventing to change disabled
breakpoints

Second test mimics the first one except for few steps
in the parent:
 - creates a new breakpoint (id 0) for bp_1 function
 - changes that breakpoint to bogus (-1) address
 - waits for the breakpoint to hit and checks
   it has proper rip of bp_1 function

This test aims on an issue in kernel disabling enabled
breakpoint after unsuccesful change.

Committer testing:

  # uname -a
  Linux jouet 4.18.0-rc8-00002-g1236568ee3cb #12 SMP Tue Aug 7 14:08:26 -03 2018 x86_64 x86_64 x86_64 GNU/Linux
  # perf test -v "bp modify"
  62: x86 bp modify                                         :
  --- start ---
  test child forked, pid 25671
  in bp_1
  tracee exited prematurely 2
  FAILED arch/x86/tests/bp-modify.c:209 modify test 1 failed

  test child finished with -1
  ---- end ----
  x86 bp modify: FAILED!
  #

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Milind Chabbi <chabbi.milind@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180827091228.2878-2-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf annotate: Properly interpret indirect call
Martin Liška [Thu, 23 Aug 2018 12:29:34 +0000 (14:29 +0200)]
perf annotate: Properly interpret indirect call

The patch changes the parsing of:

callq  *0x8(%rbx)

from:

  0.26 â”‚     â†’ callq  *8

to:

  0.26 â”‚     â†’ callq  *0x8(%rbx)

in this case an address is followed by a register, thus one can't parse
only the address.

Committer testing:

1) run 'perf record sleep 10'
2) before applying the patch, run:

     perf annotate --stdio2 > /tmp/before

3) after applying the patch, run:

     perf annotate --stdio2 > /tmp/after

4) diff /tmp/before /tmp/after:
  --- /tmp/before 2018-08-28 11:16:03.238384143 -0300
  +++ /tmp/after  2018-08-28 11:15:39.335341042 -0300
  @@ -13274,7 +13274,7 @@
                â†“ jle    128
                  hash_value = hash_table->hash_func (key);
                  mov    0x8(%rsp),%rdi
  -  0.91       â†’ callq  *30
  +  0.91       â†’ callq  *0x30(%r12)
                  mov    $0x2,%r8d
                  cmp    $0x2,%eax
                  node_hash = hash_table->hashes[node_index];
  @@ -13848,7 +13848,7 @@
                   mov    %r14,%rdi
                   sub    %rbx,%r13
                   mov    %r13,%rdx
  -              â†’ callq  *38
  +              â†’ callq  *0x38(%r15)
                   cmp    %rax,%r13
     1.91        â†“ je     240
            1b4:   mov    $0xffffffff,%r13d
  @@ -14026,7 +14026,7 @@
                   mov    %rcx,-0x500(%rbp)
                   mov    %r15,%rsi
                   mov    %r14,%rdi
  -              â†’ callq  *38
  +              â†’ callq  *0x38(%rax)
                   mov    -0x500(%rbp),%rcx
                   cmp    %rax,%rcx
                 â†“ jne    9b0
<SNIP tons of other such cases>

Signed-off-by: Martin Liška <mliska@suse.cz>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: Kim Phillips <kim.phillips@arm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/bd1f3932-be2b-85f9-7582-111ee0a43b07@suse.cz
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoMerge tag 'perf-core-for-mingo-4.19-20180820' of git://git.kernel.org/pub/scm/linux...
Ingo Molnar [Thu, 23 Aug 2018 08:29:19 +0000 (10:29 +0200)]
Merge tag 'perf-core-for-mingo-4.19-20180820' of git://git./linux/kernel/git/acme/linux into perf/urgent

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

LLVM/clang/eBPF: (Arnaldo Carvalho de Melo)

 - Allow passing options to llc in addition to to clang.

Hardware tracing: (Jack Henschel)

 - Improve error message for PMU address filters, clarifying availability of
   that feature in hardware having hardware tracing such as Intel PT.

Python interface: (Jiri Olsa)

 - Fix read_on_cpu() interface.

ELF/DWARF libraries: (Jiri Olsa)

 - Fix handling of the combo compressed module file + decompressed associated
   debuginfo file.

Build (Rasmus Villemoes)

 - Disable parallelism for 'make clean', avoiding multiple submakes deleting
   the same files and causing the build to fail on systems such as Yocto.

Kernel ABI copies: (Arnaldo Carvalho de Melo)

 - Update tools's copy of x86's cpufeatures.h.

 - Update arch/x86/lib/memcpy_64.S copy used in 'perf bench mem memcpy'.

Miscellaneous: (Steven Rostedt)

 - Change libtraceevent to SPDX License format.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
5 years agotools arch: Update arch/x86/lib/memcpy_64.S copy used in 'perf bench mem memcpy'
Arnaldo Carvalho de Melo [Mon, 20 Aug 2018 13:17:14 +0000 (10:17 -0300)]
tools arch: Update arch/x86/lib/memcpy_64.S copy used in 'perf bench mem memcpy'

To bring in the change made in this cset:

Fixes: a7bea8308933 ("x86/asm/64: Use 32-bit XOR to zero registers")

  CC       /tmp/build/perf/bench/mem-memcpy-x86-64-asm.o
  LD       /tmp/build/perf/bench/perf-in.o
  LD       /tmp/build/perf/perf-in.o
  LINK     /tmp/build/perf/perf

Silencing this perf build warning:

  Warning: Kernel ABI header at 'tools/arch/x86/lib/memcpy_64.S' differs from latest version at 'arch/x86/lib/memcpy_64.S'
  diff -u tools/arch/x86/lib/memcpy_64.S arch/x86/lib/memcpy_64.S

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jan Beulich <JBeulich@suse.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-sad22dudoz71qr3tsnlqtkia@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agotools arch x86: Update tools's copy of cpufeatures.h
Arnaldo Carvalho de Melo [Mon, 20 Aug 2018 13:13:13 +0000 (10:13 -0300)]
tools arch x86: Update tools's copy of cpufeatures.h

To get the changes in the following csets:

  301d328a6f8b ("x86/cpufeatures: Add EPT_AD feature bit")
  706d51681d63 ("x86/speculation: Support Enhanced IBRS on future CPUs")

No tools were affected, copy it to silence this perf tool build warning:

  Warning: Kernel ABI header at 'tools/arch/x86/include/asm/cpufeatures.h' differs from latest version at 'arch/x86/include/asm/cpufeatures.h'
  diff -u tools/arch/x86/include/asm/cpufeatures.h arch/x86/include/asm/cpufeatures.h

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: Peter Feiner <pfeiner@google.com>
Cc: Sai Praneeth <sai.praneeth.prakhya@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wang Nan <wangnan0@huawei.com>
Link: https://lkml.kernel.org/n/tip-bvs8wgd5wp4lz9f0xf1iug5r@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf python: Fix pyrf_evlist__read_on_cpu() interface
Jiri Olsa [Fri, 17 Aug 2018 11:45:56 +0000 (13:45 +0200)]
perf python: Fix pyrf_evlist__read_on_cpu() interface

Jaroslav reported errors from valgrind over perf python script:

  # echo 0 > /sys/devices/system/cpu/cpu4/online
  # valgrind ./test.py
  ==7524== Memcheck, a memory error detector
  ...
  ==7524== Command: ./test.py
  ==7524==
  pid 7526 exited
  ==7524== Invalid read of size 8
  ==7524==    at 0xCC2C2B3: perf_mmap__read_forward (evlist.c:780)
  ==7524==    by 0xCC2A681: pyrf_evlist__read_on_cpu (python.c:959)
  ...
  ==7524==  Address 0x65c4868 is 16 bytes after a block of size 459,36..
  ==7524==    at 0x4C2B955: calloc (vg_replace_malloc.c:711)
  ==7524==    by 0xCC2F484: zalloc (util.h:35)
  ==7524==    by 0xCC2F484: perf_evlist__alloc_mmap (evlist.c:978)
  ...

The reason for this is in the python interface, that allows a script to
pass arbitrary cpu number, which is then used to access struct
perf_evlist::mmap array. That's obviously wrong and works only when if
all cpus are available and fails if some cpu is missing, like in the
example above.

This patch makes pyrf_evlist__read_on_cpu() search the evlist's maps
array for the proper map to access.

It's linear search at the moment. Based on the way how is the
read_on_cpu used, I don't think we need to be fast in here.  But we
could add some hash in the middle to make it fast/er.

We don't allow python interface to set write_backward event attribute,
so it's safe to check only evlist's mmaps.

Reported-by: Jaroslav Å karvada <jskarvad@redhat.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Joe Mario <jmario@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180817114556.28000-3-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf mmap: Store real cpu number in 'struct perf_mmap'
Jiri Olsa [Fri, 17 Aug 2018 11:45:55 +0000 (13:45 +0200)]
perf mmap: Store real cpu number in 'struct perf_mmap'

Store the real cpu number in 'struct perf_mmap', which will be used by
python interface that allows user to read a particular memory map for
given cpu.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jaroslav Å karvada <jskarvad@redhat.com>
Cc: Joe Mario <jmario@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180817114556.28000-2-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf tools: Remove ext from struct kmod_path
Jiri Olsa [Fri, 17 Aug 2018 09:48:13 +0000 (11:48 +0200)]
perf tools: Remove ext from struct kmod_path

Having comp carrying the compression ID, we no longer need return the
extension. Removing it and updating the automated test.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180817094813.15086-14-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf tools: Add gzip_is_compressed function
Jiri Olsa [Fri, 17 Aug 2018 09:48:12 +0000 (11:48 +0200)]
perf tools: Add gzip_is_compressed function

Add implementation of the is_compressed callback for gzip.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180817094813.15086-13-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf tools: Add lzma_is_compressed function
Jiri Olsa [Fri, 17 Aug 2018 09:48:11 +0000 (11:48 +0200)]
perf tools: Add lzma_is_compressed function

Add implementation of the is_compressed callback for lzma.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180817094813.15086-12-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf tools: Add is_compressed callback to compressions array
Jiri Olsa [Fri, 17 Aug 2018 09:48:10 +0000 (11:48 +0200)]
perf tools: Add is_compressed callback to compressions array

Add is_compressed callback to the compressions array, that returns 0 if
the file is compressed or != 0 if not.

The new callback is used to recognize the situation when we have a
'compressed' object, like:

  /lib/modules/.../drivers/net/ethernet/intel/igb/igb.ko.xz

but we need to read its debug data from debuginfo files, which might not
be compressed, like:

  /root/.debug/.build-id/d6/...c4b301f/debug

So even for a 'compressed' object we read debug data from a plain
uncompressed object. To keep this transparent, we detect this in
decompress_kmodule() and return the file descriptor to the uncompressed
file.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180817094813.15086-11-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf tools: Move the temp file processing into decompress_kmodule
Jiri Olsa [Fri, 17 Aug 2018 09:48:09 +0000 (11:48 +0200)]
perf tools: Move the temp file processing into decompress_kmodule

We will add a compression check in the following patch and it makes it
easier if the file processing is done in a single place. It also makes
the current code simpler.

The decompress_kmodule function now returns the fd of the uncompressed
file and the file name in the pathname arg, if it's provided.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180817094813.15086-10-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf tools: Use compression id in decompress_kmodule()
Jiri Olsa [Fri, 17 Aug 2018 09:48:08 +0000 (11:48 +0200)]
perf tools: Use compression id in decompress_kmodule()

Once we parsed out the compression ID, we dont need to iterate all
available compressions and we can call it directly.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180817094813.15086-9-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf tools: Store compression id into struct dso
Jiri Olsa [Fri, 17 Aug 2018 09:48:07 +0000 (11:48 +0200)]
perf tools: Store compression id into struct dso

Add comp to 'struct dso' to hold the compression index.  It will be used
in the following patches.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180817094813.15086-8-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf tools: Add compression id into 'struct kmod_path'
Jiri Olsa [Fri, 17 Aug 2018 09:48:06 +0000 (11:48 +0200)]
perf tools: Add compression id into 'struct kmod_path'

Store a decompression ID in 'struct kmod_path', so it can be later
stored in 'struct dso'.

Switch 'struct kmod_path's 'comp' from 'bool' to 'int' to return the
compressions array index. Add 0 index item into compressions array, so
that the comp usage stays as it was: 0 - no compression, != 0
compression index.

Update the kmod_path tests.

Committer notes:

Use a designated initializer + terminating comma, e.g. { .fmt = NULL, }, to fix
the build in several distros:

  centos:6:       util/dso.c:201: error: missing initializer
  centos:6:       util/dso.c:201: error: (near initialization for 'compressions[0].decompress')
  debian:9:       util/dso.c:201:24: error: missing field 'decompress' initializer [-Werror,-Wmissing-field-initializers]
  fedora:25:      util/dso.c:201:24: error: missing field 'decompress' initializer [-Werror,-Wmissing-field-initializers]
  fedora:26:      util/dso.c:201:24: error: missing field 'decompress' initializer [-Werror,-Wmissing-field-initializers]
  fedora:27:      util/dso.c:201:24: error: missing field 'decompress' initializer [-Werror,-Wmissing-field-initializers]
  oraclelinux:6:  util/dso.c:201: error: missing initializer
  oraclelinux:6:  util/dso.c:201: error: (near initialization for 'compressions[0].decompress')
  ubuntu:12.04.5: util/dso.c:201:2: error: missing initializer [-Werror=missing-field-initializers]
  ubuntu:12.04.5: util/dso.c:201:2: error: (near initialization for 'compressions[0].decompress') [-Werror=missing-field-initializers]
  ubuntu:16.04:   util/dso.c:201:24: error: missing field 'decompress' initializer [-Werror,-Wmissing-field-initializers]
  ubuntu:16.10:   util/dso.c:201:24: error: missing field 'decompress' initializer [-Werror,-Wmissing-field-initializers]
  ubuntu:16.10:   util/dso.c:201:24: error: missing field 'decompress' initializer [-Werror,-Wmissing-field-initializers]
  ubuntu:17.10:   util/dso.c:201:24: error: missing field 'decompress' initializer [-Werror,-Wmissing-field-initializers]

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180817094813.15086-7-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf tools: Make is_supported_compression() static
Jiri Olsa [Fri, 17 Aug 2018 09:48:05 +0000 (11:48 +0200)]
perf tools: Make is_supported_compression() static

There's no outside user of it.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180817094813.15086-6-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf tools: Make decompress_to_file() function static
Jiri Olsa [Fri, 17 Aug 2018 09:48:04 +0000 (11:48 +0200)]
perf tools: Make decompress_to_file() function static

There's no outside user of it.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180817094813.15086-5-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf tools: Get rid of dso__needs_decompress() call in __open_dso()
Jiri Olsa [Fri, 17 Aug 2018 09:48:03 +0000 (11:48 +0200)]
perf tools: Get rid of dso__needs_decompress() call in __open_dso()

There's no need to call dso__needs_decompress() twice in the function.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180817094813.15086-4-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf tools: Get rid of dso__needs_decompress() call in symbol__disassemble()
Jiri Olsa [Fri, 17 Aug 2018 09:48:02 +0000 (11:48 +0200)]
perf tools: Get rid of dso__needs_decompress() call in symbol__disassemble()

There's no need to call dso__needs_decompress() twice in the function.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180817094813.15086-3-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf tools: Get rid of dso__needs_decompress() call in read_object_code()
Jiri Olsa [Fri, 17 Aug 2018 09:48:01 +0000 (11:48 +0200)]
perf tools: Get rid of dso__needs_decompress() call in read_object_code()

There's no need to call dso__needs_decompress() twice in the function.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180817094813.15086-2-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agotools lib traceevent: Change to SPDX License format
Steven Rostedt (VMware) [Thu, 16 Aug 2018 15:10:15 +0000 (11:10 -0400)]
tools lib traceevent: Change to SPDX License format

Replace the GPL text with SPDX tags in the tools/lib/traceevent files.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com>
Cc: linux-trace-devel@vger.kernel.org
Link: http://lkml.kernel.org/r/20180816111015.125e0f25@gandalf.local.home
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf llvm: Allow passing options to llc in addition to clang
Arnaldo Carvalho de Melo [Wed, 15 Aug 2018 20:07:01 +0000 (17:07 -0300)]
perf llvm: Allow passing options to llc in addition to clang

The newly added 'llvm.opts' variable allows passing options directly to
llc, like needed to get sane DWARF in BPF ELF debug sections:

With:

  [root@seventh perf]# cat ~/.perfconfig
  [llvm]
  dump-obj = true
clang-opt = -g
  [root@seventh perf]#

We get:

  [root@seventh perf]# perf trace -e tools/perf/examples/bpf/hello.c cat /etc/passwd > /dev/null
  LLVM: dumping tools/perf/examples/bpf/hello.o
       0.000 __bpf_stdout__:Hello, world
       0.015 __bpf_stdout__:Hello, world
       0.187 __bpf_stdout__:Hello, world
  [root@seventh perf]# pahole tools/perf/examples/bpf/hello.o
  struct clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566eefef9c3777bd780ec4cbb9efa764633b76c) {
  clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566e.org clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566eefef9c3777bd780ec4cbb9efa764633b76c); /*     0     4 */
  clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566e.org clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566eefef9c3777bd780ec4cbb9efa764633b76c); /*     4     4 */
  clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566e.org clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566eefef9c3777bd780ec4cbb9efa764633b76c); /*     8     4 */
  clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566e.org clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566eefef9c3777bd780ec4cbb9efa764633b76c); /*    12     4 */
  clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566e.org clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566eefef9c3777bd780ec4cbb9efa764633b76c); /*    16     4 */
  clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566e.org clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566eefef9c3777bd780ec4cbb9efa764633b76c); /*    20     4 */
  clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566e.org clang version 8.0.0 (http://llvm.org/git/clang.git 8587270a739ee30c926a76d5657e65e85b560f6e) (http://llvm.org/git/llvm.git 0566eefef9c3777bd780ec4cbb9efa764633b76c); /*    24     4 */

  /* size: 28, cachelines: 1, members: 7 */
  /* last cacheline: 28 bytes */
  };
  [root@seventh perf]#

Adding these options to be passed to llvm's llc:

  [root@seventh perf]# cat ~/.perfconfig
  [llvm]
  dump-obj = true
  clang-opt = -g
  opts = -mattr=dwarfris
  [root@seventh perf]#

We get sane output:

  [root@seventh perf]# perf trace -e tools/perf/examples/bpf/hello.c cat /etc/passwd > /dev/null
  LLVM: dumping tools/perf/examples/bpf/hello.o
       0.000 __bpf_stdout__:Hello, world
       0.015 __bpf_stdout__:Hello, world
       0.185 __bpf_stdout__:Hello, world
  [root@seventh perf]# pahole tools/perf/examples/bpf/hello.o
  struct bpf_map {
  unsigned int               type;                 /*     0     4 */
  unsigned int               key_size;             /*     4     4 */
  unsigned int               value_size;           /*     8     4 */
  unsigned int               max_entries;          /*    12     4 */
  unsigned int               map_flags;            /*    16     4 */
  unsigned int               inner_map_idx;        /*    20     4 */
  unsigned int               numa_node;            /*    24     4 */

  /* size: 28, cachelines: 1, members: 7 */
  /* last cacheline: 28 bytes */
  };
  [root@seventh perf]#

Cc: Alexei Starovoitov <ast@fb.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Martin KaFai Lau <kafai@fb.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>,
Cc: Yonghong Song <yhs@fb.com>
Link: https://lkml.kernel.org/n/tip-0lrwmrip4dru1651rm8xa7tq@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf parser: Improve error message for PMU address filters
Jack Henschel [Wed, 4 Jul 2018 12:13:45 +0000 (14:13 +0200)]
perf parser: Improve error message for PMU address filters

This is the second version of a patch that improves the error message of
the perf events parser when the PMU hardware does not support address
filters.

Previously, the perf returned the following error:

  $ perf record -e intel_pt// --filter 'filter sys_write'
  --filter option should follow a -e tracepoint or HW tracer option

This implies there is some syntax error present in the command line,
which is not true. Rather, notify the user that the CPU does not have
support for this feature.

For example, Intel chips based on the Broadwell micro-archticture have
the Intel PT PMU, but do not support address filtering.

Now, perf prints the following error message:

  $ perf record -e intel_pt// --filter 'filter sys_write'
  This CPU does not support address filtering

Signed-off-by: Jack Henschel <jackdev@mailbox.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180704121345.19025-1-jackdev@mailbox.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf tools: Disable parallelism for 'make clean'
Rasmus Villemoes [Thu, 5 Jul 2018 13:15:27 +0000 (15:15 +0200)]
perf tools: Disable parallelism for 'make clean'

The Yocto build system does a 'make clean' when rebuilding due to
changed dependencies, and that consistently fails for me (causing the
whole BSP build to fail) with errors such as

| find: '[...]/perf/1.0-r9/perf-1.0/plugin_mac80211.so': No such file or directory
| find: '[...]/perf/1.0-r9/perf-1.0/plugin_mac80211.so': No such file or directory
| find: find: '[...]/perf/1.0-r9/perf-1.0/libtraceevent.a''[...]/perf/1.0-r9/perf-1.0/libtraceevent.a': No such file or directory: No such file or directory
|
[...]
| find: cannot delete '/mnt/xfs/devel/pil/yocto/tmp-glibc/work/wandboard-oe-linux-gnueabi/perf/1.0-r9/perf-1.0/util/.pstack.o.cmd': No such file or directory

Apparently (despite the comment), 'make clean' ends up launching
multiple sub-makes that all want to remove the same things - perhaps
this only happens in combination with a O=... parameter. In any case, we
don't lose much by explicitly disabling the parallelism for the clean
target, and it makes automated builds much more reliable.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180705131527.19749-1-linux@rasmusvillemoes.dk
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoMerge tag 'perf-core-for-mingo-4.19-20180815' of git://git.kernel.org/pub/scm/linux...
Ingo Molnar [Sat, 18 Aug 2018 11:11:51 +0000 (13:11 +0200)]
Merge tag 'perf-core-for-mingo-4.19-20180815' of git://git./linux/kernel/git/acme/linux into perf/urgent

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

kernel:

- kallsyms, x86: Export addresses of PTI entry trampolines (Alexander Shishkin)

- kallsyms: Simplify update_iter_mod() (Adrian Hunter)

- x86: Add entry trampolines to kcore (Adrian Hunter)

Hardware tracing:

- Fix auxtrace queue resize (Adrian Hunter)

Arch specific:

- Fix uninitialized ARM SPE record error variable (Kim Phillips)

- Fix trace event post-processing in powerpc (Sandipan Das)

Build:

- Fix check-headers.sh AND list path of execution (Alexander Kapshuk)

- Remove -mcet and -fcf-protection when building the python binding
  with older clang versions (Arnaldo Carvalho de Melo)

- Make check-headers.sh check based on kernel dir (Jiri Olsa)

- Move syscall_64.tbl check into check-headers.sh (Jiri Olsa)

Infrastructure:

- Check for null when copying nsinfo.  (Benno Evers)

Libraries:

- Rename libtraceevent prefixes, prep work for making it a shared
  library generaly available (Tzvetomir Stoyanov (VMware))

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agox86: Add entry trampolines to kcore
Adrian Hunter [Wed, 6 Jun 2018 12:54:11 +0000 (15:54 +0300)]
x86: Add entry trampolines to kcore

Without program headers for PTI entry trampoline pages, the trampoline
virtual addresses do not map to anything.

Example before:

 sudo gdb --quiet vmlinux /proc/kcore
 Reading symbols from vmlinux...done.
 [New process 1]
 Core was generated by `BOOT_IMAGE=/boot/vmlinuz-4.16.0 root=UUID=a6096b83-b763-4101-807e-f33daff63233'.
 #0  0x0000000000000000 in irq_stack_union ()
 (gdb) x /21ib 0xfffffe0000006000
    0xfffffe0000006000:  Cannot access memory at address 0xfffffe0000006000
 (gdb) quit

After:

 sudo gdb --quiet vmlinux /proc/kcore
 [sudo] password for ahunter:
 Reading symbols from vmlinux...done.
 [New process 1]
 Core was generated by `BOOT_IMAGE=/boot/vmlinuz-4.16.0-fix-4-00005-gd6e65a8b4072 root=UUID=a6096b83-b7'.
 #0  0x0000000000000000 in irq_stack_union ()
 (gdb) x /21ib 0xfffffe0000006000
    0xfffffe0000006000:  swapgs
    0xfffffe0000006003:  mov    %rsp,-0x3e12(%rip)        # 0xfffffe00000021f8
    0xfffffe000000600a:  xchg   %ax,%ax
    0xfffffe000000600c:  mov    %cr3,%rsp
    0xfffffe000000600f:  bts    $0x3f,%rsp
    0xfffffe0000006014:  and    $0xffffffffffffe7ff,%rsp
    0xfffffe000000601b:  mov    %rsp,%cr3
    0xfffffe000000601e:  mov    -0x3019(%rip),%rsp        # 0xfffffe000000300c
    0xfffffe0000006025:  pushq  $0x2b
    0xfffffe0000006027:  pushq  -0x3e35(%rip)        # 0xfffffe00000021f8
    0xfffffe000000602d:  push   %r11
    0xfffffe000000602f:  pushq  $0x33
    0xfffffe0000006031:  push   %rcx
    0xfffffe0000006032:  push   %rdi
    0xfffffe0000006033:  mov    $0xffffffff91a00010,%rdi
    0xfffffe000000603a:  callq  0xfffffe0000006046
    0xfffffe000000603f:  pause
    0xfffffe0000006041:  lfence
    0xfffffe0000006044:  jmp    0xfffffe000000603f
    0xfffffe0000006046:  mov    %rdi,(%rsp)
    0xfffffe000000604a:  retq
 (gdb) quit

In addition, entry trampolines all map to the same page.  Represent that
by giving the corresponding program headers in kcore the same offset.

This has the benefit that, when perf tools uses /proc/kcore as a source
for kernel object code, samples from different CPU trampolines are
aggregated together.  Note, such aggregation is normal for profiling
i.e. people want to profile the object code, not every different virtual
address the object code might be mapped to (across different processes
for example).

Notes by PeterZ:

This also adds the KCORE_REMAP functionality.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: x86@kernel.org
Link: http://lkml.kernel.org/r/1528289651-4113-4-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agokallsyms, x86: Export addresses of PTI entry trampolines
Alexander Shishkin [Wed, 6 Jun 2018 12:54:10 +0000 (15:54 +0300)]
kallsyms, x86: Export addresses of PTI entry trampolines

Currently, the addresses of PTI entry trampolines are not exported to
user space. Kernel profiling tools need these addresses to identify the
kernel code, so add a symbol and address for each CPU's PTI entry
trampoline.

Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Acked-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: x86@kernel.org
Link: http://lkml.kernel.org/r/1528289651-4113-3-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agokallsyms: Simplify update_iter_mod()
Adrian Hunter [Wed, 6 Jun 2018 12:54:09 +0000 (15:54 +0300)]
kallsyms: Simplify update_iter_mod()

The logic in update_iter_mod() is overcomplicated and gets worse every
time another get_ksymbol_* function is added.

In preparation for adding another get_ksymbol_* function, simplify logic
in update_iter_mod().

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: (ftrace changes only) Steven Rostedt (VMware) <rostedt@goodmis.org>
Acked-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: x86@kernel.org
Link: http://lkml.kernel.org/r/1528289651-4113-2-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf auxtrace: Fix queue resize
Adrian Hunter [Tue, 14 Aug 2018 08:46:08 +0000 (11:46 +0300)]
perf auxtrace: Fix queue resize

When the number of queues grows beyond 32, the array of queues is
resized but not all members were being copied. Fix by also copying
'tid', 'cpu' and 'set'.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: stable@vger.kernel.org
Fixes: e502789302a6e ("perf auxtrace: Add helpers for queuing AUX area tracing data")
Link: http://lkml.kernel.org/r/20180814084608.6563-1-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf python: Remove -mcet and -fcf-protection when building with clang
Arnaldo Carvalho de Melo [Tue, 14 Aug 2018 21:00:40 +0000 (18:00 -0300)]
perf python: Remove -mcet and -fcf-protection when building with clang

These options are not present in older clang versions, so when we build
for a distro that has a gcc new enough to have these options and that
the distro python build config settings use them but clang doesn't
support, b00m.

This is the case with fedora 28 and rawhide, so check if clang has the
options and remove the missing ones from CFLAGS.

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-7asds7yn6gzg6ns1lw17ukul@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf arm spe: Fix uninitialized record error variable
Kim Phillips [Fri, 10 Aug 2018 22:45:12 +0000 (17:45 -0500)]
perf arm spe: Fix uninitialized record error variable

The auxtrace init variable 'err' was not being initialized, leading perf
to abort early in an SPE record command when there was no explicit
error, rather only based whatever memory contents were on the stack.
Initialize it explicitly on getting an SPE successfully, the same way
cs-etm does.

Signed-off-by: Kim Phillips <kim.phillips@arm.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Dongjiu Geng <gengdongjiu@huawei.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Fixes: ffd3d18c20b8 ("perf tools: Add ARM Statistical Profiling Extensions (SPE) support")
Link: http://lkml.kernel.org/r/20180810174512.52900813e57cbccf18ce99a2@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf tools: Move syscall_64.tbl check into check-headers.sh
Jiri Olsa [Mon, 13 Aug 2018 11:15:04 +0000 (13:15 +0200)]
perf tools: Move syscall_64.tbl check into check-headers.sh

Probably leftover from the time we introducd the check-headers.sh script.

Committer testing:

Remove the 'rseq' syscall from tools/perf/arch/x86/entry/syscalls/syscall_64.tbl
to fake a diff:

make: Entering directory '/home/acme/git/perf/tools/perf'
  BUILD:   Doing 'make -j4' parallel build
Warning: Kernel ABI header at 'tools/perf/arch/x86/entry/syscalls/syscall_64.tbl' differs from latest version at 'arch/x86/entry/syscalls/syscall_64.tbl'
diff -u tools/perf/arch/x86/entry/syscalls/syscall_64.tbl arch/x86/entry/syscalls/syscall_64.tbl
  CC       /tmp/build/perf/util/syscalltbl.o
  INSTALL  trace_plugins
<SNIP>
  $ diff -u tools/perf/arch/x86/entry/syscalls/syscall_64.tbl arch/x86/entry/syscalls/syscall_64.tbl
  --- tools/perf/arch/x86/entry/syscalls/syscall_64.tbl 2018-08-13 15:49:50.896585176 -0300
  +++ arch/x86/entry/syscalls/syscall_64.tbl 2018-07-20 12:04:04.536858304 -0300
  @@ -342,6 +342,7 @@
   331 common pkey_free __x64_sys_pkey_free
   332 common statx __x64_sys_statx
   333 common io_pgetevents __x64_sys_io_pgetevents
  +334 common rseq __x64_sys_rseq

  #
  # x32-specific system call numbers start at 512 to avoid cache impact
  $

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Kapshuk <alexander.kapshuk@gmail.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180813111504.3568-2-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf tools: Make check-headers.sh check based on kernel dir
Jiri Olsa [Mon, 13 Aug 2018 11:15:03 +0000 (13:15 +0200)]
perf tools: Make check-headers.sh check based on kernel dir

Changing the logic to compare files with paths relative to kernel source
base dir. This way we can keep the output message for 2 unrelated files,
which is coming in following patch.

Committer testing:

Remove a line from tools/arch/x86/lib/memcpy_64.S to have it detected:

make: Entering directory '/home/acme/git/perf/tools/perf'
  BUILD:   Doing 'make -j4' parallel build
Warning: Kernel ABI header at 'tools/arch/x86/lib/memcpy_64.S' differs from latest version at 'arch/x86/lib/memcpy_64.S'
diff -u tools/arch/x86/lib/memcpy_64.S arch/x86/lib/memcpy_64.S
  INSTALL  GTK UI
  INSTALL  binaries

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Kapshuk <alexander.kapshuk@gmail.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180813111504.3568-1-jolsa@kernel.org
Link: http://lkml.kernel.org/r/20180814072726.GA13931@krava
[ Do not use pushd/popd, its a bashism, reported by Michael Ellerman, fixed by Jiri Olsa ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoMerge branch 'x86-timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Tue, 14 Aug 2018 01:28:19 +0000 (18:28 -0700)]
Merge branch 'x86-timers-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 timer updates from Thomas Gleixner:
 "Early TSC based time stamping to allow better boot time analysis.

  This comes with a general cleanup of the TSC calibration code which
  grew warts and duct taping over the years and removes 250 lines of
  code. Initiated and mostly implemented by Pavel with help from various
  folks"

* 'x86-timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (37 commits)
  x86/kvmclock: Mark kvm_get_preset_lpj() as __init
  x86/tsc: Consolidate init code
  sched/clock: Disable interrupts when calling generic_sched_clock_init()
  timekeeping: Prevent false warning when persistent clock is not available
  sched/clock: Close a hole in sched_clock_init()
  x86/tsc: Make use of tsc_calibrate_cpu_early()
  x86/tsc: Split native_calibrate_cpu() into early and late parts
  sched/clock: Use static key for sched_clock_running
  sched/clock: Enable sched clock early
  sched/clock: Move sched clock initialization and merge with generic clock
  x86/tsc: Use TSC as sched clock early
  x86/tsc: Initialize cyc2ns when tsc frequency is determined
  x86/tsc: Calibrate tsc only once
  ARM/time: Remove read_boot_clock64()
  s390/time: Remove read_boot_clock64()
  timekeeping: Default boot time offset to local_clock()
  timekeeping: Replace read_boot_clock64() with read_persistent_wall_and_boot_offset()
  s390/time: Add read_persistent_wall_and_boot_offset()
  x86/xen/time: Output xen sched_clock time from 0
  x86/xen/time: Initialize pv xen time in init_hypervisor_platform()
  ...

5 years agoMerge branch 'x86/pti' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Linus Torvalds [Tue, 14 Aug 2018 00:54:17 +0000 (17:54 -0700)]
Merge branch 'x86/pti' of git://git./linux/kernel/git/tip/tip

Pull x86 PTI updates from Thomas Gleixner:
 "The Speck brigade sadly provides yet another large set of patches
  destroying the perfomance which we carefully built and preserved

   - PTI support for 32bit PAE. The missing counter part to the 64bit
     PTI code implemented by Joerg.

   - A set of fixes for the Global Bit mechanics for non PCID CPUs which
     were setting the Global Bit too widely and therefore possibly
     exposing interesting memory needlessly.

   - Protection against userspace-userspace SpectreRSB

   - Support for the upcoming Enhanced IBRS mode, which is preferred
     over IBRS. Unfortunately we dont know the performance impact of
     this, but it's expected to be less horrible than the IBRS
     hammering.

   - Cleanups and simplifications"

* 'x86/pti' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (60 commits)
  x86/mm/pti: Move user W+X check into pti_finalize()
  x86/relocs: Add __end_rodata_aligned to S_REL
  x86/mm/pti: Clone kernel-image on PTE level for 32 bit
  x86/mm/pti: Don't clear permissions in pti_clone_pmd()
  x86/mm/pti: Fix 32 bit PCID check
  x86/mm/init: Remove freed kernel image areas from alias mapping
  x86/mm/init: Add helper for freeing kernel image pages
  x86/mm/init: Pass unconverted symbol addresses to free_init_pages()
  mm: Allow non-direct-map arguments to free_reserved_area()
  x86/mm/pti: Clear Global bit more aggressively
  x86/speculation: Support Enhanced IBRS on future CPUs
  x86/speculation: Protect against userspace-userspace spectreRSB
  x86/kexec: Allocate 8k PGDs for PTI
  Revert "perf/core: Make sure the ring-buffer is mapped in all page-tables"
  x86/mm: Remove in_nmi() warning from vmalloc_fault()
  x86/entry/32: Check for VM86 mode in slow-path check
  perf/core: Make sure the ring-buffer is mapped in all page-tables
  x86/pti: Check the return value of pti_user_pagetable_walk_pmd()
  x86/pti: Check the return value of pti_user_pagetable_walk_p4d()
  x86/entry/32: Add debug code to check entry/exit CR3
  ...

5 years agoMerge branch 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Tue, 14 Aug 2018 00:50:17 +0000 (17:50 -0700)]
Merge branch 'x86-vdso-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 vdso update from Thomas Gleixner:
 "Use LD to link the VDSO libs instead of indirecting trough CC which
  causes build failures with Clang"

* 'x86-vdso-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86: vdso: Use $LD instead of $CC to link

5 years agoMerge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Tue, 14 Aug 2018 00:01:03 +0000 (17:01 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip

Pull misc x86 fixes from Thomas Gleixner:
 "Two fixes for x86:

   - Provide a declaration for native_save_fl() which unbreaks the
     wreckage caused by making it 'extern inline'.

   - Fix the failing paravirt patching which is supposed to replace
     indirect with direct calls. The wreckage is caused by an incorrect
     clobber test"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/paravirt: Fix spectre-v2 mitigations for paravirt guests
  x86/irqflags: Provide a declaration for native_save_fl

5 years agoMerge branch 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Mon, 13 Aug 2018 23:29:35 +0000 (16:29 -0700)]
Merge branch 'x86-mm-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 mm updates from Thomas Gleixner:

 - Make lazy TLB mode even lazier to avoid pointless switch_mm()
   operations, which reduces CPU load by 1-2% for memcache workloads

 - Small cleanups and improvements all over the place

* 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mm: Remove redundant check for kmem_cache_create()
  arm/asm/tlb.h: Fix build error implicit func declaration
  x86/mm/tlb: Make clear_asid_other() static
  x86/mm/tlb: Skip atomic operations for 'init_mm' in switch_mm_irqs_off()
  x86/mm/tlb: Always use lazy TLB mode
  x86/mm/tlb: Only send page table free TLB flush to lazy TLB CPUs
  x86/mm/tlb: Make lazy TLB mode lazier
  x86/mm/tlb: Restructure switch_mm_irqs_off()
  x86/mm/tlb: Leave lazy TLB mode at page table free time
  mm: Allocate the mm_cpumask (mm->cpu_bitmap[]) dynamically based on nr_cpu_ids
  x86/mm: Add TLB purge to free pmd/pte page interfaces
  ioremap: Update pgtable free interfaces with addr
  x86/mm: Disable ioremap free page handling on x86-PAE

5 years agoMerge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Mon, 13 Aug 2018 23:08:26 +0000 (16:08 -0700)]
Merge branch 'x86-platform-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 platform updates from Thomas Gleixner:
 "Trivial cleanups and improvements"

* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/platform/UV: Remove redundant check of p == q
  x86/platform/olpc: Use PTR_ERR_OR_ZERO()
  x86/platform/UV: Mark memblock related init code and data correctly

5 years agoMerge branch 'x86-cache-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Mon, 13 Aug 2018 23:01:46 +0000 (16:01 -0700)]
Merge branch 'x86-cache-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 cache QoS (RDT/CAR) updates from Thomas Gleixner:
 "Add support for pseudo-locked cache regions.

  Cache Allocation Technology (CAT) allows on certain CPUs to isolate a
  region of cache and 'lock' it. Cache pseudo-locking builds on the fact
  that a CPU can still read and write data pre-allocated outside its
  current allocated area on cache hit. With cache pseudo-locking data
  can be preloaded into a reserved portion of cache that no application
  can fill, and from that point on will only serve cache hits. The cache
  pseudo-locked memory is made accessible to user space where an
  application can map it into its virtual address space and thus have a
  region of memory with reduced average read latency.

  The locking is not perfect and gets totally screwed by WBINDV and
  similar mechanisms, but it provides a reasonable enhancement for
  certain types of latency sensitive applications.

  The implementation extends the current CAT mechanism and provides a
  generally useful exclusive CAT mode on which it builds the extra
  pseude-locked regions"

* 'x86-cache-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (45 commits)
  x86/intel_rdt: Disable PMU access
  x86/intel_rdt: Fix possible circular lock dependency
  x86/intel_rdt: Make CPU information accessible for pseudo-locked regions
  x86/intel_rdt: Support restoration of subset of permissions
  x86/intel_rdt: Fix cleanup of plr structure on error
  x86/intel_rdt: Move pseudo_lock_region_clear()
  x86/intel_rdt: Limit C-states dynamically when pseudo-locking active
  x86/intel_rdt: Support L3 cache performance event of Broadwell
  x86/intel_rdt: More precise L2 hit/miss measurements
  x86/intel_rdt: Create character device exposing pseudo-locked region
  x86/intel_rdt: Create debugfs files for pseudo-locking testing
  x86/intel_rdt: Create resctrl debug area
  x86/intel_rdt: Ensure RDT cleanup on exit
  x86/intel_rdt: Resctrl files reflect pseudo-locked information
  x86/intel_rdt: Support creation/removal of pseudo-locked region
  x86/intel_rdt: Pseudo-lock region creation/removal core
  x86/intel_rdt: Discover supported platforms via prefetch disable bits
  x86/intel_rdt: Add utilities to test pseudo-locked region possibility
  x86/intel_rdt: Split resource group removal in two
  x86/intel_rdt: Enable entering of pseudo-locksetup mode
  ...

5 years agoMerge branch 'x86-hyperv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Mon, 13 Aug 2018 22:49:04 +0000 (15:49 -0700)]
Merge branch 'x86-hyperv-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86/hyper-v update from Thomas Gleixner:
 "Add fast hypercall support for guest running on the Microsoft HyperV(isor)"

* 'x86-hyperv-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/hyper-v: Fix wrong merge conflict resolution
  x86/hyper-v: Check for VP_INVAL in hyperv_flush_tlb_others()
  x86/hyper-v: Check cpumask_to_vpset() return value in hyperv_flush_tlb_others_ex()
  x86/hyper-v: Trace PV IPI send
  x86/hyper-v: Use cheaper HVCALL_SEND_IPI hypercall when possible
  x86/hyper-v: Use 'fast' hypercall for HVCALL_SEND_IPI
  x86/hyper-v: Implement hv_do_fast_hypercall16
  x86/hyper-v: Use cheaper HVCALL_FLUSH_VIRTUAL_ADDRESS_{LIST,SPACE} hypercalls when possible

5 years agoMerge branch 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Mon, 13 Aug 2018 22:21:12 +0000 (15:21 -0700)]
Merge branch 'x86-debug-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 dump printing cleanup from Thomas Gleixner:
 "Clean up the show_opcodes() printout so nested dumps can be properly
  differentiated"

* 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86: Avoid pr_cont() in show_opcodes()

5 years agoMerge branch 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Mon, 13 Aug 2018 21:41:53 +0000 (14:41 -0700)]
Merge branch 'x86-cpu-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 cpu updates from Thomas Gleixner:
 "Two small updates for the CPU code:

   - Improve NUMA emulation

   - Add the EPT_AD CPU feature bit"

* 'x86-cpu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/cpufeatures: Add EPT_AD feature bit
  x86/numa_emulation: Introduce uniform split capability
  x86/numa_emulation: Fix emulated-to-physical node mapping

5 years agoMerge branch 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Mon, 13 Aug 2018 21:13:53 +0000 (14:13 -0700)]
Merge branch 'x86-cleanups-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 cleanups from Thomas Gleixner:
 "Trival cleanups"

* 'x86-cleanups-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/iommu: Use NULL instead of 0
  x86/platform/pcspeaker: Use PTR_ERR_OR_ZERO() to fix ptr_ret.cocci warning

5 years agoMerge branch 'x86-build-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Mon, 13 Aug 2018 21:12:24 +0000 (14:12 -0700)]
Merge branch 'x86-build-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 build cleanup from Thomas Gleixner:
 "Remove a stale quirk for a no longer supported GCC version"

* 'x86-build-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/build: Remove old -funit-at-a-time GCC quirk

5 years agoMerge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Mon, 13 Aug 2018 20:35:26 +0000 (13:35 -0700)]
Merge branch 'x86-asm-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 asm updates from Thomas Gleixner:
 "The lowlevel and ASM code updates for x86:

   - Make stack trace unwinding more reliable

   - ASM instruction updates for better code generation

   - Various cleanups"

* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/entry/64: Add two more instruction suffixes
  x86/asm/64: Use 32-bit XOR to zero registers
  x86/build/vdso: Simplify 'cmd_vdso2c'
  x86/build/vdso: Remove unused vdso-syms.lds
  x86/stacktrace: Enable HAVE_RELIABLE_STACKTRACE for the ORC unwinder
  x86/unwind/orc: Detect the end of the stack
  x86/stacktrace: Do not fail for ORC with regs on stack
  x86/stacktrace: Clarify the reliable success paths
  x86/stacktrace: Remove STACKTRACE_DUMP_ONCE
  x86/stacktrace: Do not unwind after user regs
  x86/asm: Use CC_SET/CC_OUT in percpu_cmpxchg8b_double() to micro-optimize code generation

5 years agoMerge branch 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Mon, 13 Aug 2018 20:32:42 +0000 (13:32 -0700)]
Merge branch 'x86-boot-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 boot updates from Thomas Gleixner:
 "Boot code updates for x86:

   - Allow to skip a given amount of huge pages for address layout
     randomization on the kernel command line to prevent regressions in
     the huge page allocation with small memory sizes

   - Various cleanups"

* 'x86-boot-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/boot: Use CC_SET()/CC_OUT() instead of open coding it
  x86/boot/KASLR: Make local variable mem_limit static
  x86/boot/KASLR: Skip specified number of 1GB huge pages when doing physical randomization (KASLR)
  x86/boot/KASLR: Add two new functions for 1GB huge pages handling

5 years agoMerge branch 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Mon, 13 Aug 2018 20:31:08 +0000 (13:31 -0700)]
Merge branch 'x86-apic-for-linus' of git://git./linux/kernel/git/tip/tip

Pull x86 apic update from Thomas Gleixner:
 "Trivial cleanups of the APIC related code"

* 'x86-apic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/apic: Trivial coding style fixes
  x86/vector: Merge allocate_vector() into assign_vector_locked()

5 years agoMerge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Mon, 13 Aug 2018 20:02:31 +0000 (13:02 -0700)]
Merge branch 'timers-core-for-linus' of git://git./linux/kernel/git/tip/tip

Pull timer updates from Thomas Gleixner:
 "The timers departement more or less proudly presents:

   - More Y2038 timekeeping work mostly in the core code. The work is
     slowly, but steadily targeting the actuall syscalls.

   - Enhanced timekeeping suspend/resume support by utilizing
     clocksources which do not stop during suspend, but are otherwise
     not the main timekeeping clocksources.

   - Make NTP adjustmets more accurate and immediate when the frequency
     is set directly and not incrementally.

   - Sanitize the overrung handing of posix timers

   - A new timer driver for Mediatek SoCs

   - The usual pile of fixes and updates all over the place"

* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (32 commits)
  clockevents: Warn if cpu_all_mask is used as cpumask
  tick/broadcast-hrtimer: Use cpu_possible_mask for ce_broadcast_hrtimer
  clocksource/drivers/arm_arch_timer: Fix bogus cpu_all_mask usage
  clocksource: ti-32k: Remove CLOCK_SOURCE_SUSPEND_NONSTOP flag
  timers: Clear timer_base::must_forward_clk with timer_base::lock held
  clocksource/drivers/sprd: Register one always-on timer to compensate suspend time
  clocksource/drivers/timer-mediatek: Add support for system timer
  clocksource/drivers/timer-mediatek: Convert the driver to timer-of
  clocksource/drivers/timer-mediatek: Use specific prefix for GPT
  clocksource/drivers/timer-mediatek: Rename mtk_timer to timer-mediatek
  clocksource/drivers/timer-mediatek: Add system timer bindings
  clocksource/drivers: Set clockevent device cpumask to cpu_possible_mask
  time: Introduce one suspend clocksource to compensate the suspend time
  time: Fix extra sleeptime injection when suspend fails
  timekeeping/ntp: Constify some function arguments
  ntp: Use kstrtos64 for s64 variable
  ntp: Remove redundant arguments
  timer: Fix coding style
  ktime: Provide typesafe ktime_to_ns()
  hrtimer: Improve kernel message printing
  ...

5 years agoMerge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Mon, 13 Aug 2018 19:55:49 +0000 (12:55 -0700)]
Merge branch 'perf-core-for-linus' of git://git./linux/kernel/git/tip/tip

Pull perf update from Thomas Gleixner:
 "The perf crowd presents:

  Kernel updates:

   - Removal of jprobes

   - Cleanup and consolidatation the handling of kprobes

   - Cleanup and consolidation of hardware breakpoints

   - The usual pile of fixes and updates to PMUs and event descriptors

  Tooling updates:

   - Updates and improvements all over the place. Nothing outstanding,
     just the (good) boring incremental grump work"

* 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (103 commits)
  perf trace: Do not require --no-syscalls to suppress strace like output
  perf bpf: Include uapi/linux/bpf.h from the 'perf trace' script's bpf.h
  perf tools: Allow overriding MAX_NR_CPUS at compile time
  perf bpf: Show better message when failing to load an object
  perf list: Unify metric group description format with PMU event description
  perf vendor events arm64: Update ThunderX2 implementation defined pmu core events
  perf cs-etm: Generate branch sample for CS_ETM_TRACE_ON packet
  perf cs-etm: Generate branch sample when receiving a CS_ETM_TRACE_ON packet
  perf cs-etm: Support dummy address value for CS_ETM_TRACE_ON packet
  perf cs-etm: Fix start tracing packet handling
  perf build: Fix installation directory for eBPF
  perf c2c report: Fix crash for empty browser
  perf tests: Fix indexing when invoking subtests
  perf trace: Beautify the AF_INET & AF_INET6 'socket' syscall 'protocol' args
  perf trace beauty: Add beautifiers for 'socket''s 'protocol' arg
  perf trace beauty: Do not print NULL strarray entries
  perf beauty: Add a generator for IPPROTO_ socket's protocol constants
  tools include uapi: Grab a copy of linux/in.h
  perf tests: Fix complex event name parsing
  perf evlist: Fix error out while applying initial delay and LBR
  ...

5 years agoMerge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Mon, 13 Aug 2018 19:23:39 +0000 (12:23 -0700)]
Merge branch 'locking-core-for-linus' of git://git./linux/kernel/git/tip/tip

Pull locking/atomics update from Thomas Gleixner:
 "The locking, atomics and memory model brains delivered:

   - A larger update to the atomics code which reworks the ordering
     barriers, consolidates the atomic primitives, provides the new
     atomic64_fetch_add_unless() primitive and cleans up the include
     hell.

   - Simplify cmpxchg() instrumentation and add instrumentation for
     xchg() and cmpxchg_double().

   - Updates to the memory model and documentation"

* 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (48 commits)
  locking/atomics: Rework ordering barriers
  locking/atomics: Instrument cmpxchg_double*()
  locking/atomics: Instrument xchg()
  locking/atomics: Simplify cmpxchg() instrumentation
  locking/atomics/x86: Reduce arch_cmpxchg64*() instrumentation
  tools/memory-model: Rename litmus tests to comply to norm7
  tools/memory-model/Documentation: Fix typo, smb->smp
  sched/Documentation: Update wake_up() & co. memory-barrier guarantees
  locking/spinlock, sched/core: Clarify requirements for smp_mb__after_spinlock()
  sched/core: Use smp_mb() in wake_woken_function()
  tools/memory-model: Add informal LKMM documentation to MAINTAINERS
  locking/atomics/Documentation: Describe atomic_set() as a write operation
  tools/memory-model: Make scripts executable
  tools/memory-model: Remove ACCESS_ONCE() from model
  tools/memory-model: Remove ACCESS_ONCE() from recipes
  locking/memory-barriers.txt/kokr: Update Korean translation to fix broken DMA vs. MMIO ordering example
  MAINTAINERS: Add Daniel Lustig as an LKMM reviewer
  tools/memory-model: Fix ISA2+pooncelock+pooncelock+pombonce name
  tools/memory-model: Add litmus test for full multicopy atomicity
  locking/refcount: Always allow checked forms
  ...

5 years agoMerge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Mon, 13 Aug 2018 19:21:46 +0000 (12:21 -0700)]
Merge branch 'smp-hotplug-for-linus' of git://git./linux/kernel/git/tip/tip

Pull CPU hotplug update from Thomas Gleixner:
 "A trivial name fix for the hotplug state machine"

* 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  cpu/hotplug: Clarify CPU hotplug step name for timers

5 years agoperf tools: Fix check-headers.sh AND list path of execution
Alexander Kapshuk [Sat, 11 Aug 2018 08:39:15 +0000 (11:39 +0300)]
perf tools: Fix check-headers.sh AND list path of execution

The '||' path of execution in the 'test' block of the check_2() function
may also be taken if file2 does not exist, in which case the warning
message about the ABI headers being different would still be printed
where it should not be.  See below.

  % file1=file1; file2=file2
  % cmd="echo diff $file1 $file2"
  % test -f $file2 && \
    eval $cmd || echo "Warning: Kernel ABI header at 'tools/$file1'
                       differs from latest version at '$file2'" >&2
                       Warning: Kernel ABI header at 'tools/file1' differs from latest
                       version at 'file2'

The proposed patch converts the code following the '&&' operator into a
compound list to be executed in the current process environment only if file2
does exist. Should the files being compared differ, a diff command to compare
the files concerned is printed on standard output. E.g.

  $ diff -u tools/arch/x86/lib/memcpy_64.S arch/x86/lib/memcpy_64.S

Committer testing:

Remove a line from that tools/arch/x86/lib/memcpy_64.S file to test
this:

  BUILD:   Doing 'make -j4' parallel build
Warning: Kernel ABI header at 'tools/arch/x86/lib/memcpy_64.S' differs from latest version at 'arch/x86/lib/memcpy_64.S'
diff -u tools/arch/x86/lib/memcpy_64.S arch/x86/lib/memcpy_64.S
  CC       /tmp/build/perf/bench/mem-memcpy-x86-64-asm.o

Signed-off-by: Alexander Kapshuk <alexander.kapshuk@gmail.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180811083915.17471-1-alexander.kapshuk@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoperf tools: Check for null when copying nsinfo.
Benno Evers [Fri, 10 Aug 2018 13:36:13 +0000 (15:36 +0200)]
perf tools: Check for null when copying nsinfo.

The argument to nsinfo__copy() was assumed to be valid, but some code paths
exist that will lead to NULL being passed.

In particular, running 'perf script -D' on a perf.data file containing an
PERF_RECORD_MMAP event associating the '[vdso]' dso with pid 0 earlier in
the event stream will lead to a segfault.

Since all calling code is already checking for a non-null return value,
just return NULL for this case as well.

Signed-off-by: Benno Evers <bevers@mesosphere.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Krister Johansen <kjlx@templeofstupid.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180810133614.9925-1-bevers@mesosphere.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agotools lib traceevent: Rename static variables and functions in event-parse.c
Tzvetomir Stoyanov (VMware) [Wed, 8 Aug 2018 18:03:09 +0000 (14:03 -0400)]
tools lib traceevent: Rename static variables and functions in event-parse.c

In order to make libtraceevent into a proper library, variables, data
structures and functions require a unique prefix to prevent name space
conflicts. That prefix will be "tep_" and not "pevent_". This changes
static variables and functions in event-parse.c: pevent_func_params,
__pevent_parse_format, __pevent_parse_event, pevent_error_str, pevent_search_event

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com>
Cc: linux-trace-devel@vger.kernel.org
Link: http://lkml.kernel.org/r/20180808180703.575392642@goodmis.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agotools lib traceevent: Rename various pevent APIs
Tzvetomir Stoyanov (VMware) [Wed, 8 Aug 2018 18:03:08 +0000 (14:03 -0400)]
tools lib traceevent: Rename various pevent APIs

In order to make libtraceevent into a proper library, variables, data
structures and functions require a unique prefix to prevent name space
conflicts. That prefix will be "tep_" and not "pevent_". This changes
APIs: pevent_reset_function_resolver, pevent_strerror, pevent_list_events,
pevent_event_common_fields, pevent_event_fields, pevent_ref, pevent_unref

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com>
Cc: linux-trace-devel@vger.kernel.org
Link: http://lkml.kernel.org/r/20180808180703.426198047@goodmis.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agotools lib traceevent: Rename internal parser related APIs
Tzvetomir Stoyanov (VMware) [Wed, 8 Aug 2018 18:03:07 +0000 (14:03 -0400)]
tools lib traceevent: Rename internal parser related APIs

In order to make libtraceevent into a proper library, variables, data
structures and functions require a unique prefix to prevent name space
conflicts. That prefix will be "tep_" and not "pevent_". This changes
APIs: pevent_buffer_init, pevent_read_token, pevent_free_token,
pevent_peek_char, pevent_get_input_buf, pevent_get_input_buf_ptr

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com>
Cc: linux-trace-devel@vger.kernel.org
Link: http://lkml.kernel.org/r/20180808180703.275281085@goodmis.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agotools lib traceevent: Rename various pevent get/set/is APIs
Tzvetomir Stoyanov (VMware) [Wed, 8 Aug 2018 18:03:06 +0000 (14:03 -0400)]
tools lib traceevent: Rename various pevent get/set/is APIs

In order to make libtraceevent into a proper library, variables, data
structures and functions require a unique prefix to prevent name space
conflicts. That prefix will be "tep_" and not "pevent_". This changes
APIs: pevent_pid_is_registered, pevent_get_cpus, pevent_set_cpus,
pevent_is_file_bigendian, pevent_is_host_bigendian, pevent_is_latency_format,
pevent_set_latency_format

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com>
Cc: linux-trace-devel@vger.kernel.org
Link: http://lkml.kernel.org/r/20180808180703.114110715@goodmis.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agotools lib traceevent: Rename pevent_find_* APIs
Tzvetomir Stoyanov (VMware) [Wed, 8 Aug 2018 18:03:05 +0000 (14:03 -0400)]
tools lib traceevent: Rename pevent_find_* APIs

In order to make libtraceevent into a proper library, variables, data
structures and functions require a unique prefix to prevent name space
conflicts. That prefix will be "tep_" and not "pevent_". This changes
APIs: pevent_find_function, pevent_find_function_address,
pevent_find_event_by_name, pevent_find_event_by_record

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com>
Cc: linux-trace-devel@vger.kernel.org
Link: http://lkml.kernel.org/r/20180808180702.966965051@goodmis.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agotools lib traceevent: Rename pevent field APIs
Tzvetomir Stoyanov (VMware) [Wed, 8 Aug 2018 18:03:04 +0000 (14:03 -0400)]
tools lib traceevent: Rename pevent field APIs

In order to make libtraceevent into a proper library, variables, data
structures and functions require a unique prefix to prevent name space
conflicts. That prefix will be "tep_" and not "pevent_". This changes
APIs: pevent_free_format, pevent_free_format_field, pevent_get_field_raw,
pevent_get_field_val, pevent_get_common_field_val, pevent_get_any_field_val

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com>
Cc: linux-trace-devel@vger.kernel.org
Link: http://lkml.kernel.org/r/20180808180702.821244942@goodmis.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agotools lib traceevent: Rename pevent_data_ APIs
Tzvetomir Stoyanov (VMware) [Wed, 8 Aug 2018 18:03:03 +0000 (14:03 -0400)]
tools lib traceevent: Rename pevent_data_ APIs

In order to make libtraceevent into a proper library, variables, data
structures and functions require a unique prefix to prevent name space
conflicts. That prefix will be "tep_" and not "pevent_". This changes
APIs: pevent_data_lat_fmt, pevent_data_type, pevent_data_event_from_type,
pevent_data_pid, pevent_data_preempt_count, pevent_data_flags,
pevent_data_comm_from_pid, pevent_data_pid_from_comm, pevent_cmdline_pid

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com>
Cc: linux-trace-devel@vger.kernel.org
Link: http://lkml.kernel.org/r/20180808180702.678020020@goodmis.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agotools lib traceevent: Rename pevent_register / unregister APIs
Tzvetomir Stoyanov (VMware) [Wed, 8 Aug 2018 18:03:02 +0000 (14:03 -0400)]
tools lib traceevent: Rename pevent_register / unregister APIs

In order to make libtraceevent into a proper library, variables, data
structures and functions require a unique prefix to prevent name space
conflicts. That prefix will be "tep_" and not "pevent_". This changes
APIs: pevent_register_print_function, pevent_unregister_print_function,
pevent_register_event_handler, pevent_unregister_event_handler,
pevent_register_function, pevent_register_trace_clock

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com>
Cc: linux-trace-devel@vger.kernel.org
Link: http://lkml.kernel.org/r/20180808180702.524813185@goodmis.org
Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agotools lib traceevent: Rename pevent_filter* APIs
Tzvetomir Stoyanov (VMware) [Wed, 8 Aug 2018 18:03:01 +0000 (14:03 -0400)]
tools lib traceevent: Rename pevent_filter* APIs

In order to make libtraceevent into a proper library, variables, data
structures and functions require a unique prefix to prevent name space
conflicts. That prefix will be "tep_" and not "pevent_". This changes
APIs: PEVENT_FILTER_ERROR_BUFSZ, pevent_filter_alloc,
pevent_filter_add_filter_str, pevent_filter_match, pevent_filter_strerror,
pevent_event_filtered, pevent_filter_reset, pevent_filter_clear_trivial,
pevent_filter_free, pevent_filter_make_string, pevent_filter_remove_event,
pevent_filter_event_has_trivial, pevent_filter_copy, pevent_update_trivial,
pevent_filter_compare

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com>
Cc: linux-trace-devel@vger.kernel.org
Link: http://lkml.kernel.org/r/20180808180702.370659353@goodmis.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agotools lib traceevent, perf tools: Rename traceevent_plugin_* APIs
Tzvetomir Stoyanov (VMware) [Wed, 8 Aug 2018 18:03:00 +0000 (14:03 -0400)]
tools lib traceevent,  perf tools: Rename traceevent_plugin_* APIs

In order to make libtraceevent into a proper library, variables, data
structures and functions require a unique prefix to prevent name space
conflicts. That prefix will be "tep_" and not "traceevent_". This changes
APIs: traceevent_plugin_list_options, traceevent_plugin_free_options_list,
traceevent_plugin_add_options, traceevent_plugin_remove_options,
traceevent_print_plugins

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com>
Cc: linux-trace-devel@vger.kernel.org
Link: http://lkml.kernel.org/r/20180808180702.089951638@goodmis.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agoMerge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Mon, 13 Aug 2018 18:25:07 +0000 (11:25 -0700)]
Merge branch 'sched-core-for-linus' of git://git./linux/kernel/git/tip/tip

Pull scheduler updates from Thomas Gleixner:

 - Cleanup and improvement of NUMA balancing

 - Refactoring and improvements to the PELT (Per Entity Load Tracking)
   code

 - Watchdog simplification and related cleanups

 - The usual pile of small incremental fixes and improvements

* 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (41 commits)
  watchdog: Reduce message verbosity
  stop_machine: Reflow cpu_stop_queue_two_works()
  sched/numa: Move task_numa_placement() closer to numa_migrate_preferred()
  sched/numa: Use group_weights to identify if migration degrades locality
  sched/numa: Update the scan period without holding the numa_group lock
  sched/numa: Remove numa_has_capacity()
  sched/numa: Modify migrate_swap() to accept additional parameters
  sched/numa: Remove unused task_capacity from 'struct numa_stats'
  sched/numa: Skip nodes that are at 'hoplimit'
  sched/debug: Reverse the order of printing faults
  sched/numa: Use task faults only if numa_group is not yet set up
  sched/numa: Set preferred_node based on best_cpu
  sched/numa: Simplify load_too_imbalanced()
  sched/numa: Evaluate move once per node
  sched/numa: Remove redundant field
  sched/debug: Show the sum wait time of a task group
  sched/fair: Remove #ifdefs from scale_rt_capacity()
  sched/core: Remove get_cpu() from sched_fork()
  sched/cpufreq: Clarify sugov_get_util()
  sched/sysctl: Remove unused sched_time_avg_ms sysctl
  ...

5 years agotools lib traceevent: Rename pevent_function* APIs
Tzvetomir Stoyanov (VMware) [Wed, 8 Aug 2018 18:02:59 +0000 (14:02 -0400)]
tools lib traceevent: Rename pevent_function* APIs

In order to make libtraceevent into a proper library, variables, data
structures and functions require a unique prefix to prevent name space
conflicts. That prefix will be "tep_" and not "pevent_". This changes
APIs: pevent_function_handler, pevent_func_handler,
pevent_func_arg_type, PEVENT_FUNC_ARG_VOID, PEVENT_FUNC_ARG_INT,
PEVENT_FUNC_ARG_LONG, PEVENT_FUNC_ARG_STRING, PEVENT_FUNC_ARG_PTRS,
PEVENT_FUNC_ARG_MAX_TYPES

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com>
Cc: linux-trace-devel@vger.kernel.org
Link: http://lkml.kernel.org/r/20180808180701.935881193@goodmis.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agotools lib traceevent, tools lib lockdep: Rename 'enum pevent_errno' to 'enum tep_errno'
Tzvetomir Stoyanov (VMware) [Wed, 8 Aug 2018 18:02:58 +0000 (14:02 -0400)]
tools lib traceevent, tools lib lockdep: Rename 'enum pevent_errno' to 'enum tep_errno'

In order to make libtraceevent into a proper library, variables, data
structures and functions require a unique prefix to prevent name space
conflicts. That prefix will be "tep_" and not "pevent_". This changes
'enum pevent_errno' to 'enum tep_errno'.

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com>
Cc: linux-trace-devel@vger.kernel.org
Link: http://lkml.kernel.org/r/20180808180701.770475059@goodmis.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agotools lib traceevent, perf tools: Rename 'enum pevent_flag' to 'enum tep_flag'
Tzvetomir Stoyanov (VMware) [Wed, 8 Aug 2018 18:02:57 +0000 (14:02 -0400)]
tools lib traceevent, perf tools: Rename 'enum pevent_flag' to 'enum tep_flag'

In order to make libtraceevent into a proper library, variables, data
structures and functions require a unique prefix to prevent name space
conflicts. That prefix will be "tep_" and not "pevent_". This changes
pevent_get_page_size API and enum pevent_flag to enum tep_flag

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com>
Cc: linux-trace-devel@vger.kernel.org
Link: http://lkml.kernel.org/r/20180808180701.623942406@goodmis.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agotools lib traceevent, perf tools: Rename traceevent_* APIs
Tzvetomir Stoyanov (VMware) [Wed, 8 Aug 2018 18:02:56 +0000 (14:02 -0400)]
tools lib traceevent, perf tools: Rename traceevent_* APIs

In order to make libtraceevent into a proper library, variables, data
structures and functions require a unique prefix to prevent name space
conflicts. That prefix will be "tep_" and not "traceevent_". This
changes APIs: traceevent_host_bigendian, traceevent_load_plugins and
traceevent_unload_plugins

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com>
Cc: linux-trace-devel@vger.kernel.org
Link: http://lkml.kernel.org/r/20180808180701.484691639@goodmis.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agotools lib traceevent, perf tools: Rename pevent_set_* APIs
Tzvetomir Stoyanov (VMware) [Wed, 8 Aug 2018 18:02:55 +0000 (14:02 -0400)]
tools lib traceevent, perf tools: Rename pevent_set_* APIs

In order to make libtraceevent into a proper library, variables, data
structures and functions require a unique prefix to prevent name space
conflicts. That prefix will be "tep_" and not "pevent_". This changes
APIs: pevent_set_file_bigendian, pevent_set_flag,
pevent_set_function_resolver, pevent_set_host_bigendian,
pevent_set_long_size, pevent_set_page_size and pevent_get_long_size

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com>
Cc: linux-trace-devel@vger.kernel.org
Link: http://lkml.kernel.org/r/20180808180701.256265951@goodmis.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agotools lib traceevent, perf tools: Rename pevent_register_* APIs
Tzvetomir Stoyanov (VMware) [Wed, 8 Aug 2018 18:02:54 +0000 (14:02 -0400)]
tools lib traceevent, perf tools: Rename pevent_register_* APIs

In order to make libtraceevent into a proper library, variables, data
structures and functions require a unique prefix to prevent name space
conflicts. That prefix will be "tep_" and not "pevent_". This changes
APIs: pevent_register_comm, pevent_register_print_string

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com>
Cc: linux-trace-devel@vger.kernel.org
Link: http://lkml.kernel.org/r/20180808180700.948980691@goodmis.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agotools lib traceevent, perf tools: Rename pevent_read_number_* APIs
Tzvetomir Stoyanov (VMware) [Wed, 8 Aug 2018 18:02:53 +0000 (14:02 -0400)]
tools lib traceevent, perf tools: Rename pevent_read_number_* APIs

In order to make libtraceevent into a proper library, variables, data
structures and functions require a unique prefix to prevent name space
conflicts. That prefix will be "tep_" and not "pevent_". This changes
APIs: pevent_read_number, pevent_read_number_field

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com>
Cc: linux-trace-devel@vger.kernel.org
Link: http://lkml.kernel.org/r/20180808180700.804271434@goodmis.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
5 years agotools lib traceevent, perf tools: Rename pevent print APIs
Tzvetomir Stoyanov (VMware) [Wed, 8 Aug 2018 18:02:52 +0000 (14:02 -0400)]
tools lib traceevent, perf tools: Rename pevent print APIs

In order to make libtraceevent into a proper library, variables, data
structures and functions require a unique prefix to prevent name space
conflicts. That prefix will be "tep_" and not "pevent_". This changes
APIs: pevent_print_field, pevent_print_fields, pevent_print_funcs,
pevent_print_printk

Signed-off-by: Tzvetomir Stoyanov (VMware) <tz.stoyanov@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Yordan Karadzhov (VMware) <y.karadz@gmail.com>
Cc: linux-trace-devel@vger.kernel.org
Link: http://lkml.kernel.org/r/20180808180700.654453763@goodmis.org
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>