[PATCH v3 19/22] perf test: BP tests, remove is_supported use

From: Ian Rogers
Date: Thu Nov 04 2021 - 02:45:32 EST


Migrate the is_supported functionality to returning TEST_SKIP.
Motivation is kunit has no is_supported function.

Signed-off-by: Ian Rogers <irogers@xxxxxxxxxx>
---
tools/perf/tests/bp_account.c | 45 +++++++++++----------------
tools/perf/tests/bp_signal.c | 43 ++++---------------------
tools/perf/tests/bp_signal_overflow.c | 16 ++++------
tools/perf/tests/tests.h | 21 ++++++++++++-
4 files changed, 51 insertions(+), 74 deletions(-)

diff --git a/tools/perf/tests/bp_account.c b/tools/perf/tests/bp_account.c
index e4f7b635ffef..d1ebb5561e5b 100644
--- a/tools/perf/tests/bp_account.c
+++ b/tools/perf/tests/bp_account.c
@@ -19,6 +19,19 @@
#include "../perf-sys.h"
#include "cloexec.h"

+/*
+ * 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__)
+#define BP_ACCOUNT_IS_SUPPORTED 0
+#else
+#define BP_ACCOUNT_IS_SUPPORTED 1
+#endif
+
static volatile long the_var;

static noinline int test_function(void)
@@ -180,6 +193,11 @@ static int test__bp_accounting(struct test_suite *test __maybe_unused, int subte
int bp_cnt = detect_cnt(true);
int share = detect_share(wp_cnt, bp_cnt);

+ if (!BP_ACCOUNT_IS_SUPPORTED) {
+ pr_debug("Test not supported on this architecture");
+ return TEST_SKIP;
+ }
+
pr_debug("watchpoints count %d, breakpoints count %d, has_ioctl %d, share %d\n",
wp_cnt, bp_cnt, has_ioctl, share);

@@ -189,29 +207,4 @@ static int test__bp_accounting(struct test_suite *test __maybe_unused, int subte
return bp_accounting(wp_cnt, share);
}

-static 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
-}
-
-static struct test_case bp_accounting_tests[] = {
- TEST_CASE("Breakpoint accounting", bp_accounting),
- { .name = NULL, }
-};
-
-struct test_suite suite__bp_accounting = {
- .desc = "Breakpoint accounting",
- .test_cases = bp_accounting_tests,
- .is_supported = test__bp_account_is_supported,
-};
+DEFINE_SUITE("Breakpoint accounting", bp_accounting);
diff --git a/tools/perf/tests/bp_signal.c b/tools/perf/tests/bp_signal.c
index 1676e3a11906..1f2908f02389 100644
--- a/tools/perf/tests/bp_signal.c
+++ b/tools/perf/tests/bp_signal.c
@@ -166,6 +166,11 @@ static int test__bp_signal(struct test_suite *test __maybe_unused, int subtest _
struct sigaction sa;
long long count1, count2, count3;

+ if (!BP_SIGNAL_IS_SUPPORTED) {
+ pr_debug("Test not supported on this architecture");
+ return TEST_SKIP;
+ }
+
/* setup SIGIO signal handler */
memset(&sa, 0, sizeof(struct sigaction));
sa.sa_sigaction = (void *) sig_handler;
@@ -285,40 +290,4 @@ static int test__bp_signal(struct test_suite *test __maybe_unused, int subtest _
TEST_OK : TEST_FAIL;
}

-bool test__bp_signal_is_supported(void)
-{
- /*
- * PowerPC and S390 do not support creation of instruction
- * breakpoints using the perf_event interface.
- *
- * ARM requires explicit rounding down of the instruction
- * pointer in Thumb mode, and then requires the single-step
- * to be handled explicitly in the overflow handler to avoid
- * stepping into the SIGIO handler and getting stuck on the
- * breakpointed instruction.
- *
- * Since arm64 has the same issue with arm for the single-step
- * handling, this case also gets stuck on the breakpointed
- * instruction.
- *
- * Just disable the test for these architectures until these
- * issues are resolved.
- */
-#if defined(__powerpc__) || defined(__s390x__) || defined(__arm__) || \
- defined(__aarch64__)
- return false;
-#else
- return true;
-#endif
-}
-
-static struct test_case bp_signal_tests[] = {
- TEST_CASE("Breakpoint overflow signal handler", bp_signal),
- { .name = NULL, }
-};
-
-struct test_suite suite__bp_signal = {
- .desc = "Breakpoint overflow signal handler",
- .test_cases = bp_signal_tests,
- .is_supported = test__bp_signal_is_supported,
-};
+DEFINE_SUITE("Breakpoint overflow signal handler", bp_signal);
diff --git a/tools/perf/tests/bp_signal_overflow.c b/tools/perf/tests/bp_signal_overflow.c
index bc1f13851750..4e897c2cf26b 100644
--- a/tools/perf/tests/bp_signal_overflow.c
+++ b/tools/perf/tests/bp_signal_overflow.c
@@ -66,6 +66,11 @@ static int test__bp_signal_overflow(struct test_suite *test __maybe_unused, int
long long count;
int fd, i, fails = 0;

+ if (!BP_SIGNAL_IS_SUPPORTED) {
+ pr_debug("Test not supported on this architecture");
+ return TEST_SKIP;
+ }
+
/* setup SIGIO signal handler */
memset(&sa, 0, sizeof(struct sigaction));
sa.sa_sigaction = (void *) sig_handler;
@@ -134,13 +139,4 @@ static int test__bp_signal_overflow(struct test_suite *test __maybe_unused, int
return fails ? TEST_FAIL : TEST_OK;
}

-static struct test_case bp_signal_overflow_tests[] = {
- TEST_CASE("Breakpoint overflow sampling", bp_signal_overflow),
- { .name = NULL, }
-};
-
-struct test_suite suite__bp_signal_overflow = {
- .desc = "Breakpoint overflow sampling",
- .test_cases = bp_signal_overflow_tests,
- .is_supported = test__bp_signal_is_supported,
-};
+DEFINE_SUITE("Breakpoint overflow sampling", bp_signal_overflow);
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
index cae33c375d55..958f94dcc94c 100644
--- a/tools/perf/tests/tests.h
+++ b/tools/perf/tests/tests.h
@@ -151,7 +151,26 @@ DECLARE_SUITE(expand_cgroup_events);
DECLARE_SUITE(perf_time_to_tsc);
DECLARE_SUITE(dlfilter);

-bool test__bp_signal_is_supported(void);
+/*
+ * PowerPC and S390 do not support creation of instruction breakpoints using the
+ * perf_event interface.
+ *
+ * ARM requires explicit rounding down of the instruction pointer in Thumb mode,
+ * and then requires the single-step to be handled explicitly in the overflow
+ * handler to avoid stepping into the SIGIO handler and getting stuck on the
+ * breakpointed instruction.
+ *
+ * Since arm64 has the same issue with arm for the single-step handling, this
+ * case also gets stuck on the breakpointed instruction.
+ *
+ * Just disable the test for these architectures until these issues are
+ * resolved.
+ */
+#if defined(__powerpc__) || defined(__s390x__) || defined(__arm__) || defined(__aarch64__)
+#define BP_SIGNAL_IS_SUPPORTED 0
+#else
+#define BP_SIGNAL_IS_SUPPORTED 1
+#endif

#ifdef HAVE_DWARF_UNWIND_SUPPORT
struct thread;
--
2.33.1.1089.g2158813163f-goog