The datasym workload is to check if perf mem command gets the data
addresses precisely. This is needed for data symbol test.
$ perf test -w datasym
I had to keep the buf1 in the data section, otherwise it could end
up in the BSS and was mmaped as a separate //anon region, then it
was not symbolized at all. It needs to be fixed separately.
Committer notes:
Add a -U _FORTIFY_SOURCE to the datasym CFLAGS, as the main perf flags
set it and it requires building with optimization, and this new test has
a -O0.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
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: James Clark <james.clark@arm.com>
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/20221116233854.1596378-12-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
&workload__leafloop,
&workload__sqrtloop,
&workload__brstack,
+ &workload__datasym,
};
static int num_subtests(const struct test_suite *t)
DECLARE_WORKLOAD(leafloop);
DECLARE_WORKLOAD(sqrtloop);
DECLARE_WORKLOAD(brstack);
+DECLARE_WORKLOAD(datasym);
#endif /* TESTS_H */
perf-y += leafloop.o
perf-y += sqrtloop.o
perf-y += brstack.o
+perf-y += datasym.o
CFLAGS_sqrtloop.o = -g -O0 -fno-inline -U_FORTIFY_SOURCE
CFLAGS_leafloop.o = -g -O0 -fno-inline -fno-omit-frame-pointer -U_FORTIFY_SOURCE
CFLAGS_brstack.o = -g -O0 -fno-inline -U_FORTIFY_SOURCE
+CFLAGS_datasym.o = -g -O0 -fno-inline -U_FORTIFY_SOURCE
--- /dev/null
+#include <linux/compiler.h>
+#include "../tests.h"
+
+typedef struct _buf {
+ char data1;
+ char reserved[55];
+ char data2;
+} buf __attribute__((aligned(64)));
+
+static buf buf1 = {
+ /* to have this in the data section */
+ .reserved[0] = 1,
+};
+
+static int datasym(int argc __maybe_unused, const char **argv __maybe_unused)
+{
+ for (;;) {
+ buf1.data1++;
+ buf1.data2 += buf1.data1;
+ }
+ return 0;
+}
+
+DEFINE_WORKLOAD(datasym);