[PATCH 41/57] perf tests bp_account: Add dedicated checking helper is_supported()

Arnaldo Carvalho de Melo
2019-10-21T13:41:03Z

From: Leo Yan <leo.yan@linaro.org>

The arm architecture supports breakpoint accounting but it doesn't
support breakpoint overflow signal handling. The current code uses the
same checking helper, thus it disables both testings (bp_account and
bp_signal) for arm platform.

For handling two testings separately, this patch adds a dedicated
checking helper is_supported() for breakpoint accounting testing, thus
it allows supporting breakpoint accounting testing on arm platform; the
old helper test__bp_signal_is_supported() is only used to checking for
breakpoint overflow signal testing.

Signed-off-by: Leo Yan <leo.yan@linaro.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Brajeswar Ghosh <brajeswar.linux@gmail.com>
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Petlan <mpetlan@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: Souptick Joarder <jrdr.linux@gmail.com>
Cc: Will Deacon <will@kernel.org>
Link: http://lore.kernel.org/lkml/20191018085531.6348-2-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/tests/bp_account.c | 16 ++++++++++++++++
tools/perf/tests/builtin-test.c | 2 +-
tools/perf/tests/tests.h | 1 +
3 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/tools/perf/tests/bp_account.c b/tools/perf/tests/bp_account.c
index 52ff7a462670..d0b935356274 100644
--- a/tools/perf/tests/bp_account.c
+++ b/tools/perf/tests/bp_account.c
@@ -188,3 +188,19 @@ int test__bp_accounting(struct test *test __maybe_unused, int subtest __maybe_un

return bp_accounting(wp_cnt, share);
}
+
+bool test__bp_account_is_supported(void)
+{
+ /*
+ * PowerPC and S390 do not support creation of instruction
+ * breakpoints using the perf_event interface.
+ *
+ * Just disable the test for these architectures until these
+ * issues are resolved.
+ */
+#if defined(__powerpc__) || defined(__s390x__)
+ return false;
+#else
+ return true;
+#endif
+}
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 55774baffc2a..8b286e9b7549 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -121,7 +121,7 @@ static struct test generic_tests[] = {
{
.desc = "Breakpoint accounting",
.func = test__bp_accounting,
- .is_supported = test__bp_signal_is_supported,
+ .is_supported = test__bp_account_is_supported,
},
{
.desc = "Watchpoint",
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index 72912eb473cb..9837b6e93023 100644
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -111,6 +111,7 @@ int test__map_groups__merge_in(struct test *t, int subtest);
int test__time_utils(struct test *t, int subtest);

bool test__bp_signal_is_supported(void);
+bool test__bp_account_is_supported(void);
bool test__wp_is_supported(void);

#if defined(__arm__) || defined(__aarch64__)
--
2.21.0