linux.git/tools/perf/scripts/python/Perf-Trace-Util/Context.c, branch v6.12.80

perf thread: Add accessor functions for thread

2023-06-12T18:57:53+00:00

Using accessors will make it easier to add reference count checking in
later patches.

Committer notes:

thread->nsinfo wasn't wrapped as it is used together with
nsinfo__zput(), where does a trick to set the field with a refcount
being dropped to NULL, and that doesn't work well with using
thread__nsinfo(thread), that loses the &thread->nsinfo pointer.

When refcount checking is added to 'struct thread', later in this
series, nsinfo__zput(RC_CHK_ACCESS(thread)->nsinfo) will be used to
check the thread pointer.

Signed-off-by: Ian Rogers 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Ali Saidi 
Cc: Andi Kleen 
Cc: Athira Rajeev 
Cc: Brian Robbins 
Cc: Changbin Du 
Cc: Dmitrii Dolgov <9erthalion6@gmail.com>
Cc: Fangrui Song 
Cc: German Gomez 
Cc: Ingo Molnar 
Cc: Ivan Babrou 
Cc: James Clark 
Cc: Jing Zhang 
Cc: Jiri Olsa 
Cc: John Garry 
Cc: K Prateek Nayak 
Cc: Kan Liang 
Cc: Leo Yan 
Cc: Liam Howlett 
Cc: Mark Rutland 
Cc: Miguel Ojeda 
Cc: Mike Leach 
Cc: Namhyung Kim 
Cc: Naveen N. Rao 
Cc: Peter Zijlstra 
Cc: Ravi Bangoria 
Cc: Sean Christopherson 
Cc: Steinar H. Gunderson 
Cc: Suzuki Poulouse 
Cc: Wenyu Liu 
Cc: Will Deacon 
Cc: Yang Jihong 
Cc: Ye Xingchen 
Cc: Yuan Can 
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Link: https://lore.kernel.org/r/20230608232823.4027869-4-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo

perf map: Add accessor for dso

2023-04-04T19:41:57+00:00

Later changes will add reference count checking for struct map, with
dso being the most frequently accessed variable. Add an accessor so
that the reference count check is only necessary in one place.

Additional changes:
 - add a dso variable to avoid repeated map__dso calls.
 - in builtin-mem.c dump_raw_samples, code only partially tested for
   dso == NULL. Make the possibility of NULL consistent.
 - in thread.c thread__memcpy fix use of spaces and use tabs.

Committer notes:

Did missing conversions on these files:

   tools/perf/arch/powerpc/util/skip-callchain-idx.c
   tools/perf/arch/powerpc/util/sym-handling.c
   tools/perf/ui/browsers/hists.c
   tools/perf/ui/gtk/annotate.c
   tools/perf/util/cs-etm.c
   tools/perf/util/thread.c
   tools/perf/util/unwind-libunwind-local.c
   tools/perf/util/unwind-libunwind.c

Signed-off-by: Ian Rogers 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Alexey Bayduraev 
Cc: Andi Kleen 
Cc: Andrew Morton 
Cc: Andy Shevchenko 
Cc: Darren Hart 
Cc: Davidlohr Bueso 
Cc: Dmitriy Vyukov 
Cc: Eric Dumazet 
Cc: German Gomez 
Cc: Hao Luo 
Cc: Ingo Molnar 
Cc: James Clark 
Cc: Jiri Olsa 
Cc: John Garry 
Cc: Kajol Jain 
Cc: Kan Liang 
Cc: Leo Yan 
Cc: Madhavan Srinivasan 
Cc: Mark Rutland 
Cc: Masami Hiramatsu 
Cc: Miaoqian Lin 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Riccardo Mancini 
Cc: Shunsuke Nakamura 
Cc: Song Liu 
Cc: Stephane Eranian 
Cc: Stephen Brennan 
Cc: Steven Rostedt (VMware) 
Cc: Thomas Gleixner 
Cc: Thomas Richter 
Cc: Yury Norov 
Link: https://lore.kernel.org/r/20230320212248.1175731-2-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo

perf maps: Add functions to access maps

2023-04-04T18:45:38+00:00

Introduce functions to access struct maps. These functions reduce the
number of places reference counting is necessary. While tidying APIs do
some small const-ification, in particlar to unwind_libunwind_ops.

Committer notes:

Fixed up tools/perf/util/unwind-libunwind.c:

-               return ops->get_entries(cb, arg, thread, data, max_stack);
+               return ops->get_entries(cb, arg, thread, data, max_stack, best_effort);

Signed-off-by: Ian Rogers 
Cc: Adrian Hunter 
Cc: Alexander Shishkin 
Cc: Alexey Bayduraev 
Cc: Andi Kleen 
Cc: Andrew Morton 
Cc: Andy Shevchenko 
Cc: Darren Hart 
Cc: Davidlohr Bueso 
Cc: Dmitriy Vyukov 
Cc: Eric Dumazet 
Cc: German Gomez 
Cc: Hao Luo 
Cc: Ingo Molnar 
Cc: James Clark 
Cc: Jiri Olsa 
Cc: John Garry 
Cc: Kajol Jain 
Cc: Kan Liang 
Cc: Leo Yan 
Cc: Madhavan Srinivasan 
Cc: Mark Rutland 
Cc: Masami Hiramatsu 
Cc: Miaoqian Lin 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Cc: Riccardo Mancini 
Cc: Shunsuke Nakamura 
Cc: Song Liu 
Cc: Stephane Eranian 
Cc: Stephen Brennan 
Cc: Steven Rostedt (VMware) 
Cc: Thomas Gleixner 
Cc: Thomas Richter 
Cc: Yury Norov 
Link: https://lore.kernel.org/r/20230320212248.1175731-2-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo

perf script: Fix Python support when no libtraceevent

2023-03-15T13:27:07+00:00

Python scripting can be used without libtraceevent. In particular,
scripting for Intel PT does not use tracepoints, and so does not need
libtraceevent support.

Alter the build and employ conditional compilation to allow Python
scripting without libtraceevent.

Example:

 Before:

    $ ldd `which perf` | grep -i python
    $ ldd `which perf` | grep -i libtraceevent
    $ perf record -e intel_pt//u uname
    Linux
    [ perf record: Woken up 1 times to write data ]
    [ perf record: Captured and wrote 0.031 MB perf.data ]
    $ perf script intel-pt-events.py |& head -3
      Error: Couldn't find script `intel-pt-events.py'

     See perf script -l for available scripts.

 After:

    $ ldd `which perf` | grep -i python
            libpython3.10.so.1.0 => /lib/x86_64-linux-gnu/libpython3.10.so.1.0 (0x00007f4bac400000)
    $ ldd `which perf` | grep -i libtraceevent
    $ perf script intel-pt-events.py | head
    Intel PT Branch Trace, Power Events, Event Trace and PTWRITE
         Switch In    8021/8021  [000]     11234.097713404     0/0
           perf-exec  8021/8021  [000]     11234.098041726       psb                        offset: 0x0                0 [unknown] ([unknown])
           perf-exec  8021/8021  [000]     11234.098041726       cbr                         45  freq: 4505 MHz  (161%)                0 [unknown] ([unknown])
               uname  8021/8021  [000]     11234.098082170  branches:uH  tr strt                              0 [unknown] ([unknown]) => 7f3a8b9422b0 _start+0x0 (/usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2)
               uname  8021/8021  [000]     11234.098082379  branches:uH  tr end                    7f3a8b9422b0 _start+0x0 (/usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2) => 0 [unknown] ([unknown])
               uname  8021/8021  [000]     11234.098083629  branches:uH  tr strt                              0 [unknown] ([unknown]) => 7f3a8b9422b0 _start+0x0 (/usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2)
               uname  8021/8021  [000]     11234.098083629  branches:uH  call                      7f3a8b9422b3 _start+0x3 (/usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2) => 7f3a8b943050 _dl_start+0x0 (/usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2)
               uname  8021/8021  [000]     11234.098083837  branches:uH  tr end                    7f3a8b943060 _dl_start+0x10 (/usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2) => 0 [unknown] ([unknown])  IPC: 0.01 (9/938)
               uname  8021/8021  [000]     11234.098084670  branches:uH  tr strt                              0 [unknown] ([unknown]) => 7f3a8b943060 _dl_start+0x10 (/usr/lib/x86_64-linux-gnu/ld-linux-x86-64.so.2)

Fixes: 378ef0f5d9d7f465 ("perf build: Use libtraceevent from the system")
Signed-off-by: Adrian Hunter 
Cc: Ian Rogers 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Link: https://lore.kernel.org/r/20230315084321.14563-1-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf scripting python: Add perf_sample_srcline() and perf_sample_srccode()

2021-06-01T13:04:35+00:00

Add perf_sample_srcline() and perf_sample_srccode() to the
perf_trace_context module so that a script can get the srcline or srccode
information.

Signed-off-by: Adrian Hunter 
Cc: Andi Kleen 
Cc: Jiri Olsa 
Link: https://lore.kernel.org/r/20210530192308.7382-11-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf scripting python: Add perf_set_itrace_options()

2021-06-01T13:04:24+00:00

Add perf_set_itrace_options() to the perf_trace_context module so that a
script can set the itrace options for a session if they have not been set
already.

Signed-off-by: Adrian Hunter 
Cc: Andi Kleen 
Cc: Jiri Olsa 
Link: https://lore.kernel.org/r/20210530192308.7382-10-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf scripting python: Add perf_sample_insn()

2021-06-01T13:03:58+00:00

Add perf_sample_insn() to the perf_trace_context module so that a script
can get the instruction bytes.

Signed-off-by: Adrian Hunter 
Cc: Andi Kleen 
Cc: Jiri Olsa 
Link: https://lore.kernel.org/r/20210530192308.7382-8-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf scripting python: Assign perf_script_context

2021-06-01T13:03:33+00:00

The scripting_context pointer itself does not change and nor does it need
to. Put it directly into the script as a variable at the start so it does
not have to be passed on each call into the script.

Signed-off-by: Adrian Hunter 
Cc: Andi Kleen 
Cc: Jiri Olsa 
Link: https://lore.kernel.org/r/20210530192308.7382-6-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf scripting python: Simplify perf-trace-context module functions

2021-06-01T13:02:47+00:00

Simplify perf-trace-context module functions by factoring out some
common code.

Signed-off-by: Adrian Hunter 
Cc: Andi Kleen 
Cc: Jiri Olsa 
Link: https://lore.kernel.org/r/20210530192308.7382-3-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo

perf scripting python: Remove unnecessary 'static'

2021-06-01T13:02:25+00:00

The variables are always assigned before use, making the 'static'
storage class unnecessary.

Signed-off-by: Adrian Hunter 
Cc: Arnaldo Carvalho de Melo 
Cc: Andi Kleen 
Cc: Jiri Olsa 
Link: https://lore.kernel.org/r/20210530192308.7382-2-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo