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