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// SPDX-License-Identifier: GPL-2.0-only
#include <stdbool.h>
#include <inttypes.h>
#include <stdlib.h>
#include <string.h>
#include <linux/bitops.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include "event.h"
#include "evsel.h"
#include "debug.h"
#include "util/sample.h"
#include "util/synthetic-events.h"
#include "tests/tests.h"
#include "arch-tests.h"
#define COMP(m) do { \
if (s1->m != s2->m) { \
pr_debug("Samples differ at '"#m"'\n"); \
return false; \
} \
} while (0)
static bool samples_same(const struct perf_sample *s1,
const struct perf_sample *s2,
u64 type)
{
if (type & PERF_SAMPLE_WEIGHT_STRUCT) {
COMP(ins_lat);
COMP(retire_lat);
}
return true;
}
static int do_test(u64 sample_type)
{
struct evsel evsel = {
.needs_swap = false,
.core = {
. attr = {
.sample_type = sample_type,
.read_format = 0,
},
},
};
union perf_event *event;
struct perf_sample sample = {
.weight = 101,
.ins_lat = 102,
.retire_lat = 103,
};
struct perf_sample sample_out;
size_t i, sz, bufsz;
int err, ret = -1;
sz = perf_event__sample_event_size(&sample, sample_type, 0);
bufsz = sz + 4096; /* Add a bit for overrun checking */
event = malloc(bufsz);
if (!event) {
pr_debug("malloc failed\n");
return -1;
}
memset(event, 0xff, bufsz);
event->header.type = PERF_RECORD_SAMPLE;
event->header.misc = 0;
event->header.size = sz;
err = perf_event__synthesize_sample(event, sample_type, 0, &sample);
if (err) {
pr_debug("%s failed for sample_type %#"PRIx64", error %d\n",
"perf_event__synthesize_sample", sample_type, err);
goto out_free;
}
/* The data does not contain 0xff so we use that to check the size */
for (i = bufsz; i > 0; i--) {
if (*(i - 1 + (u8 *)event) != 0xff)
break;
}
if (i != sz) {
pr_debug("Event size mismatch: actual %zu vs expected %zu\n",
i, sz);
goto out_free;
}
evsel.sample_size = __evsel__sample_size(sample_type);
err = evsel__parse_sample(&evsel, event, &sample_out);
if (err) {
pr_debug("%s failed for sample_type %#"PRIx64", error %d\n",
"evsel__parse_sample", sample_type, err);
goto out_free;
}
if (!samples_same(&sample, &sample_out, sample_type)) {
pr_debug("parsing failed for sample_type %#"PRIx64"\n",
sample_type);
goto out_free;
}
ret = 0;
out_free:
free(event);
return ret;
}
/**
* test__x86_sample_parsing - test X86 specific sample parsing
*
* This function implements a test that synthesizes a sample event, parses it
* and then checks that the parsed sample matches the original sample. If the
* test passes %0 is returned, otherwise %-1 is returned.
*
* For now, the PERF_SAMPLE_WEIGHT_STRUCT is the only X86 specific sample type.
* The test only checks the PERF_SAMPLE_WEIGHT_STRUCT type.
*/
int test__x86_sample_parsing(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
{
return do_test(PERF_SAMPLE_WEIGHT_STRUCT);
}
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