10 #define COMP(m) do { \
11 if (s1->m != s2->m) { \
12 pr_debug("Samples differ at '"#m"'\n"); \
17 #define MCOMP(m) do { \
18 if (memcmp(&s1->m, &s2->m, sizeof(s1->m))) { \
19 pr_debug("Samples differ at '"#m"'\n"); \
24 static bool samples_same(const struct perf_sample *s1,
25 const struct perf_sample *s2, u64 type, u64 regs_user,
30 if (type & PERF_SAMPLE_IDENTIFIER)
33 if (type & PERF_SAMPLE_IP)
36 if (type & PERF_SAMPLE_TID) {
41 if (type & PERF_SAMPLE_TIME)
44 if (type & PERF_SAMPLE_ADDR)
47 if (type & PERF_SAMPLE_ID)
50 if (type & PERF_SAMPLE_STREAM_ID)
53 if (type & PERF_SAMPLE_CPU)
56 if (type & PERF_SAMPLE_PERIOD)
59 if (type & PERF_SAMPLE_READ) {
60 if (read_format & PERF_FORMAT_GROUP)
64 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
65 COMP(read.time_enabled);
66 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
67 COMP(read.time_running);
68 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
69 if (read_format & PERF_FORMAT_GROUP) {
70 for (i = 0; i < s1->read.group.nr; i++)
71 MCOMP(read.group.values[i]);
77 if (type & PERF_SAMPLE_CALLCHAIN) {
79 for (i = 0; i < s1->callchain->nr; i++)
80 COMP(callchain->ips[i]);
83 if (type & PERF_SAMPLE_RAW) {
85 if (memcmp(s1->raw_data, s2->raw_data, s1->raw_size)) {
86 pr_debug("Samples differ at 'raw_data'\n");
91 if (type & PERF_SAMPLE_BRANCH_STACK) {
92 COMP(branch_stack->nr);
93 for (i = 0; i < s1->branch_stack->nr; i++)
94 MCOMP(branch_stack->entries[i]);
97 if (type & PERF_SAMPLE_REGS_USER) {
98 size_t sz = hweight_long(regs_user) * sizeof(u64);
101 if (s1->user_regs.abi &&
102 (!s1->user_regs.regs || !s2->user_regs.regs ||
103 memcmp(s1->user_regs.regs, s2->user_regs.regs, sz))) {
104 pr_debug("Samples differ at 'user_regs'\n");
109 if (type & PERF_SAMPLE_STACK_USER) {
110 COMP(user_stack.size);
111 if (memcmp(s1->user_stack.data, s1->user_stack.data,
112 s1->user_stack.size)) {
113 pr_debug("Samples differ at 'user_stack'\n");
118 if (type & PERF_SAMPLE_WEIGHT)
121 if (type & PERF_SAMPLE_DATA_SRC)
127 static int do_test(u64 sample_type, u64 sample_regs_user, u64 read_format)
129 struct perf_evsel evsel = {
132 .sample_type = sample_type,
133 .sample_regs_user = sample_regs_user,
134 .read_format = read_format,
137 union perf_event *event;
139 struct ip_callchain callchain;
143 .data = {3, 201, 202, 203},
146 struct branch_stack branch_stack;
150 .data = {1, 211, 212, 213},
153 const u64 raw_data[] = {0x123456780a0b0c0dULL, 0x1102030405060708ULL};
154 const u64 data[] = {0x2211443366558877ULL, 0, 0xaabbccddeeff4321ULL};
155 struct perf_sample sample = {
166 .raw_size = sizeof(raw_data),
168 .raw_data = (void *)raw_data,
169 .callchain = &callchain.callchain,
170 .branch_stack = &branch_stack.branch_stack,
172 .abi = PERF_SAMPLE_REGS_ABI_64,
176 .size = sizeof(data),
177 .data = (void *)data,
180 .time_enabled = 0x030a59d664fca7deULL,
181 .time_running = 0x011b6ae553eb98edULL,
184 struct sample_read_value values[] = {{1, 5}, {9, 3}, {2, 7}, {6, 4},};
185 struct perf_sample sample_out;
189 for (i = 0; i < sizeof(user_regs); i++)
190 *(i + (u8 *)user_regs) = i & 0xfe;
192 if (read_format & PERF_FORMAT_GROUP) {
193 sample.read.group.nr = 4;
194 sample.read.group.values = values;
196 sample.read.one.value = 0x08789faeb786aa87ULL;
197 sample.read.one.id = 99;
200 sz = perf_event__sample_event_size(&sample, sample_type,
201 sample_regs_user, read_format);
202 bufsz = sz + 4096; /* Add a bit for overrun checking */
203 event = malloc(bufsz);
205 pr_debug("malloc failed\n");
209 memset(event, 0xff, bufsz);
210 event->header.type = PERF_RECORD_SAMPLE;
211 event->header.misc = 0;
212 event->header.size = sz;
214 err = perf_event__synthesize_sample(event, sample_type,
215 sample_regs_user, read_format,
218 pr_debug("%s failed for sample_type %#"PRIx64", error %d\n",
219 "perf_event__synthesize_sample", sample_type, err);
223 /* The data does not contain 0xff so we use that to check the size */
224 for (i = bufsz; i > 0; i--) {
225 if (*(i - 1 + (u8 *)event) != 0xff)
229 pr_debug("Event size mismatch: actual %zu vs expected %zu\n",
234 evsel.sample_size = __perf_evsel__sample_size(sample_type);
236 err = perf_evsel__parse_sample(&evsel, event, &sample_out);
238 pr_debug("%s failed for sample_type %#"PRIx64", error %d\n",
239 "perf_evsel__parse_sample", sample_type, err);
243 if (!samples_same(&sample, &sample_out, sample_type,
244 sample_regs_user, read_format)) {
245 pr_debug("parsing failed for sample_type %#"PRIx64"\n",
253 if (ret && read_format)
254 pr_debug("read_format %#"PRIx64"\n", read_format);
259 * test__sample_parsing - test sample parsing.
261 * This function implements a test that synthesizes a sample event, parses it
262 * and then checks that the parsed sample matches the original sample. The test
263 * checks sample format bits separately and together. If the test passes %0 is
264 * returned, otherwise %-1 is returned.
266 int test__sample_parsing(void)
268 const u64 rf[] = {4, 5, 6, 7, 12, 13, 14, 15};
270 u64 sample_regs_user;
275 * Fail the test if it has not been updated when new sample format bits
278 if (PERF_SAMPLE_MAX > PERF_SAMPLE_IDENTIFIER << 1) {
279 pr_debug("sample format has changed - test needs updating\n");
283 /* Test each sample format bit separately */
284 for (sample_type = 1; sample_type != PERF_SAMPLE_MAX;
286 /* Test read_format variations */
287 if (sample_type == PERF_SAMPLE_READ) {
288 for (i = 0; i < ARRAY_SIZE(rf); i++) {
289 err = do_test(sample_type, 0, rf[i]);
296 if (sample_type == PERF_SAMPLE_REGS_USER)
297 sample_regs_user = 0x3fff;
299 sample_regs_user = 0;
301 err = do_test(sample_type, sample_regs_user, 0);
306 /* Test all sample format bits together */
307 sample_type = PERF_SAMPLE_MAX - 1;
308 sample_regs_user = 0x3fff;
309 for (i = 0; i < ARRAY_SIZE(rf); i++) {
310 err = do_test(sample_type, sample_regs_user, rf[i]);