perf tests: Skip pipe test if noploop symbol is missing

perf pipe recording and injection test depends on finding symbol noploop in
perf, and fails if perf has been stripped and no debug object is available.
In that case, skip the test instead.

Example:

Before:

$ strip tools/perf/perf
$ tools/perf/perf buildid-cache -p `realpath tools/perf/perf`
$ tools/perf/perf test -v pipe
86: perf pipe recording and injection test :
--- start ---
test child forked, pid 47734
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.000 MB - ]
47741 47741 -1 |perf
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.000 MB - ]
cannot find noploop function in pipe #1
test child finished with -1
---- end ----
perf pipe recording and injection test: FAILED!

After:

$ tools/perf/perf test -v pipe
86: perf pipe recording and injection test :
--- start ---
test child forked, pid 48996
perf does not have symbol 'noploop'
perf is missing symbols - skipping test
test child finished with -2
---- end ----
perf pipe recording and injection test: Skip

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Ian Rogers <irogers@google.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20231123075848.9652-4-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

perf test: Replace pipe test workload with noploop

So that it can get rid of requirement of a compiler.
Also define and use more local symbols to ease future changes.

$ sudo ./perf test -v pipe
87: perf pipe recording and injection test :
--- start ---
test child forked, pid 748003
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.000 MB - ]
748014 748014 -1 |perf
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.000 MB - ]
99.83% perf perf [.] noploop
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.000 MB - ]
99.85% perf perf [.] noploop
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.160 MB /tmp/perf.data.2XYPdw (4007 samples) ]
99.83% perf perf [.] noploop
test child finished with 0
---- end ----
perf pipe recording and injection test: Ok

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: James Clark <james.clark@arm.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Zhengjun Xing <zhengjun.xing@linux.intel.com>
Link: https://lore.kernel.org/r/20221116233854.1596378-3-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

perf tools: Add pipe_test.sh to verify pipe operations

It builds a test program and use it to verify pipe behavior with perf
record, inject and report.

$ perf test pipe -v
80: perf pipe recording and injection test :
--- start ---
test child forked, pid 1109301
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.000 MB - ]
1109315 1109315 -1 |test.file.MGNff
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.000 MB - ]
99.99% test.file.MGNff test.file.MGNffM [.] noploop
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.000 MB - ]
99.99% test.file.MGNff test.file.MGNffM [.] noploop
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.153 MB /tmp/perf.data.dmsnlx (3995 samples) ]
99.99% test.file.MGNff test.file.MGNffM [.] noploop
test child finished with 0
---- end ----
perf pipe recording and injection test: Ok

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20210719223153.1618812-6-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>