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Subject[PATCH 02/15] perf tools: Add AUX area sample parsing
Date
Add support for parsing samples containing AUX area data
i.e. PERF_SAMPLE_AUX.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
---
tools/perf/tests/sample-parsing.c | 16 +++++++++++++++-
tools/perf/util/event.h | 6 ++++++
tools/perf/util/evsel.c | 13 +++++++++++++
tools/perf/util/perf_event_attr_fprintf.c | 2 +-
tools/perf/util/synthetic-events.c | 12 ++++++++++++
5 files changed, 47 insertions(+), 2 deletions(-)

diff --git a/tools/perf/tests/sample-parsing.c b/tools/perf/tests/sample-parsing.c
index 3a02426db9a6..2762e1155238 100644
--- a/tools/perf/tests/sample-parsing.c
+++ b/tools/perf/tests/sample-parsing.c
@@ -150,6 +150,15 @@ static bool samples_same(const struct perf_sample *s1,
if (type & PERF_SAMPLE_PHYS_ADDR)
COMP(phys_addr);

+ if (type & PERF_SAMPLE_AUX) {
+ COMP(aux_sample.size);
+ if (memcmp(s1->aux_sample.data, s2->aux_sample.data,
+ s1->aux_sample.size)) {
+ pr_debug("Samples differ at 'aux_sample'\n");
+ return false;
+ }
+ }
+
return true;
}

@@ -182,6 +191,7 @@ static int do_test(u64 sample_type, u64 sample_regs, u64 read_format)
u64 regs[64];
const u64 raw_data[] = {0x123456780a0b0c0dULL, 0x1102030405060708ULL};
const u64 data[] = {0x2211443366558877ULL, 0, 0xaabbccddeeff4321ULL};
+ const u64 aux_data[] = {0xa55a, 0, 0xeeddee, 0x0282028202820282};
struct perf_sample sample = {
.ip = 101,
.pid = 102,
@@ -218,6 +228,10 @@ static int do_test(u64 sample_type, u64 sample_regs, u64 read_format)
.regs = regs,
},
.phys_addr = 113,
+ .aux_sample = {
+ .size = sizeof(aux_data),
+ .data = (void *)aux_data,
+ },
};
struct sample_read_value values[] = {{1, 5}, {9, 3}, {2, 7}, {6, 4},};
struct perf_sample sample_out;
@@ -317,7 +331,7 @@ int test__sample_parsing(struct test *test __maybe_unused, int subtest __maybe_u
* were added. Please actually update the test rather than just change
* the condition below.
*/
- if (PERF_SAMPLE_MAX > PERF_SAMPLE_PHYS_ADDR << 1) {
+ if (PERF_SAMPLE_MAX > PERF_SAMPLE_AUX << 1) {
pr_debug("sample format has changed, some new PERF_SAMPLE_ bit was introduced - test needs updating\n");
return -1;
}
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index a0a0c91cde4a..85223159737c 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -114,6 +114,11 @@ enum {

#define MAX_INSN 16

+struct aux_sample {
+ u64 size;
+ void *data;
+};
+
struct perf_sample {
u64 ip;
u32 pid, tid;
@@ -142,6 +147,7 @@ struct perf_sample {
struct regs_dump intr_regs;
struct stack_dump user_stack;
struct sample_read read;
+ struct aux_sample aux_sample;
};

#define PERF_MEM_DATA_SRC_NONE \
diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 1bf60f325608..772f4879c492 100644
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -2209,6 +2209,19 @@ int perf_evsel__parse_sample(struct evsel *evsel, union perf_event *event,
array++;
}

+ if (type & PERF_SAMPLE_AUX) {
+ OVERFLOW_CHECK_u64(array);
+ sz = *array++;
+
+ OVERFLOW_CHECK(array, sz, max_size);
+ /* Undo swap of data */
+ if (swapped)
+ mem_bswap_64((char *)array, sz);
+ data->aux_sample.size = sz;
+ data->aux_sample.data = (char *)array;
+ array = (void *)array + sz;
+ }
+
return 0;
}

diff --git a/tools/perf/util/perf_event_attr_fprintf.c b/tools/perf/util/perf_event_attr_fprintf.c
index 06add607e72d..651203126c71 100644
--- a/tools/perf/util/perf_event_attr_fprintf.c
+++ b/tools/perf/util/perf_event_attr_fprintf.c
@@ -34,7 +34,7 @@ static void __p_sample_type(char *buf, size_t size, u64 value)
bit_name(PERIOD), bit_name(STREAM_ID), bit_name(RAW),
bit_name(BRANCH_STACK), bit_name(REGS_USER), bit_name(STACK_USER),
bit_name(IDENTIFIER), bit_name(REGS_INTR), bit_name(DATA_SRC),
- bit_name(WEIGHT), bit_name(PHYS_ADDR),
+ bit_name(WEIGHT), bit_name(PHYS_ADDR), bit_name(AUX),
{ .name = NULL, }
};
#undef bit_name
diff --git a/tools/perf/util/synthetic-events.c b/tools/perf/util/synthetic-events.c
index cfa3c9f67141..48c3f8b9c852 100644
--- a/tools/perf/util/synthetic-events.c
+++ b/tools/perf/util/synthetic-events.c
@@ -1228,6 +1228,11 @@ size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type,
if (type & PERF_SAMPLE_PHYS_ADDR)
result += sizeof(u64);

+ if (type & PERF_SAMPLE_AUX) {
+ result += sizeof(u64);
+ result += sample->aux_sample.size;
+ }
+
return result;
}

@@ -1396,6 +1401,13 @@ int perf_event__synthesize_sample(union perf_event *event, u64 type, u64 read_fo
array++;
}

+ if (type & PERF_SAMPLE_AUX) {
+ sz = sample->aux_sample.size;
+ *array++ = sz;
+ memcpy(array, sample->aux_sample.data, sz);
+ array = (void *)array + sz;
+ }
+
return 0;
}

--
2.17.1
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