1 // SPDX-License-Identifier: GPL-2.0
4 #include <linux/bitops.h>
5 #include <linux/kernel.h>
6 #include <linux/types.h>
16 #define COMP(m) do { \
17 if (s1->m != s2->m) { \
18 pr_debug("Samples differ at '"#m"'\n"); \
23 #define MCOMP(m) do { \
24 if (memcmp(&s1->m, &s2->m, sizeof(s1->m))) { \
25 pr_debug("Samples differ at '"#m"'\n"); \
30 static bool samples_same(const struct perf_sample *s1,
31 const struct perf_sample *s2,
32 u64 type, u64 read_format)
36 if (type & PERF_SAMPLE_IDENTIFIER)
39 if (type & PERF_SAMPLE_IP)
42 if (type & PERF_SAMPLE_TID) {
47 if (type & PERF_SAMPLE_TIME)
50 if (type & PERF_SAMPLE_ADDR)
53 if (type & PERF_SAMPLE_ID)
56 if (type & PERF_SAMPLE_STREAM_ID)
59 if (type & PERF_SAMPLE_CPU)
62 if (type & PERF_SAMPLE_PERIOD)
65 if (type & PERF_SAMPLE_READ) {
66 if (read_format & PERF_FORMAT_GROUP)
70 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
71 COMP(read.time_enabled);
72 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
73 COMP(read.time_running);
74 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
75 if (read_format & PERF_FORMAT_GROUP) {
76 for (i = 0; i < s1->read.group.nr; i++)
77 MCOMP(read.group.values[i]);
83 if (type & PERF_SAMPLE_CALLCHAIN) {
85 for (i = 0; i < s1->callchain->nr; i++)
86 COMP(callchain->ips[i]);
89 if (type & PERF_SAMPLE_RAW) {
91 if (memcmp(s1->raw_data, s2->raw_data, s1->raw_size)) {
92 pr_debug("Samples differ at 'raw_data'\n");
97 if (type & PERF_SAMPLE_BRANCH_STACK) {
98 COMP(branch_stack->nr);
99 for (i = 0; i < s1->branch_stack->nr; i++)
100 MCOMP(branch_stack->entries[i]);
103 if (type & PERF_SAMPLE_REGS_USER) {
104 size_t sz = hweight_long(s1->user_regs.mask) * sizeof(u64);
106 COMP(user_regs.mask);
108 if (s1->user_regs.abi &&
109 (!s1->user_regs.regs || !s2->user_regs.regs ||
110 memcmp(s1->user_regs.regs, s2->user_regs.regs, sz))) {
111 pr_debug("Samples differ at 'user_regs'\n");
116 if (type & PERF_SAMPLE_STACK_USER) {
117 COMP(user_stack.size);
118 if (memcmp(s1->user_stack.data, s2->user_stack.data,
119 s1->user_stack.size)) {
120 pr_debug("Samples differ at 'user_stack'\n");
125 if (type & PERF_SAMPLE_WEIGHT)
128 if (type & PERF_SAMPLE_DATA_SRC)
131 if (type & PERF_SAMPLE_TRANSACTION)
134 if (type & PERF_SAMPLE_REGS_INTR) {
135 size_t sz = hweight_long(s1->intr_regs.mask) * sizeof(u64);
137 COMP(intr_regs.mask);
139 if (s1->intr_regs.abi &&
140 (!s1->intr_regs.regs || !s2->intr_regs.regs ||
141 memcmp(s1->intr_regs.regs, s2->intr_regs.regs, sz))) {
142 pr_debug("Samples differ at 'intr_regs'\n");
147 if (type & PERF_SAMPLE_PHYS_ADDR)
153 static int do_test(u64 sample_type, u64 sample_regs, u64 read_format)
155 struct perf_evsel evsel = {
158 .sample_type = sample_type,
159 .read_format = read_format,
162 union perf_event *event;
164 struct ip_callchain callchain;
168 .data = {3, 201, 202, 203},
171 struct branch_stack branch_stack;
175 .data = {1, 211, 212, 213},
178 const u64 raw_data[] = {0x123456780a0b0c0dULL, 0x1102030405060708ULL};
179 const u64 data[] = {0x2211443366558877ULL, 0, 0xaabbccddeeff4321ULL};
180 struct perf_sample sample = {
191 .raw_size = sizeof(raw_data),
194 .raw_data = (void *)raw_data,
195 .callchain = &callchain.callchain,
196 .branch_stack = &branch_stack.branch_stack,
198 .abi = PERF_SAMPLE_REGS_ABI_64,
203 .size = sizeof(data),
204 .data = (void *)data,
207 .time_enabled = 0x030a59d664fca7deULL,
208 .time_running = 0x011b6ae553eb98edULL,
211 .abi = PERF_SAMPLE_REGS_ABI_64,
217 struct sample_read_value values[] = {{1, 5}, {9, 3}, {2, 7}, {6, 4},};
218 struct perf_sample sample_out;
222 if (sample_type & PERF_SAMPLE_REGS_USER)
223 evsel.attr.sample_regs_user = sample_regs;
225 if (sample_type & PERF_SAMPLE_REGS_INTR)
226 evsel.attr.sample_regs_intr = sample_regs;
228 for (i = 0; i < sizeof(regs); i++)
229 *(i + (u8 *)regs) = i & 0xfe;
231 if (read_format & PERF_FORMAT_GROUP) {
232 sample.read.group.nr = 4;
233 sample.read.group.values = values;
235 sample.read.one.value = 0x08789faeb786aa87ULL;
236 sample.read.one.id = 99;
239 sz = perf_event__sample_event_size(&sample, sample_type, read_format);
240 bufsz = sz + 4096; /* Add a bit for overrun checking */
241 event = malloc(bufsz);
243 pr_debug("malloc failed\n");
247 memset(event, 0xff, bufsz);
248 event->header.type = PERF_RECORD_SAMPLE;
249 event->header.misc = 0;
250 event->header.size = sz;
252 err = perf_event__synthesize_sample(event, sample_type, read_format,
255 pr_debug("%s failed for sample_type %#"PRIx64", error %d\n",
256 "perf_event__synthesize_sample", sample_type, err);
260 /* The data does not contain 0xff so we use that to check the size */
261 for (i = bufsz; i > 0; i--) {
262 if (*(i - 1 + (u8 *)event) != 0xff)
266 pr_debug("Event size mismatch: actual %zu vs expected %zu\n",
271 evsel.sample_size = __perf_evsel__sample_size(sample_type);
273 err = perf_evsel__parse_sample(&evsel, event, &sample_out);
275 pr_debug("%s failed for sample_type %#"PRIx64", error %d\n",
276 "perf_evsel__parse_sample", sample_type, err);
280 if (!samples_same(&sample, &sample_out, sample_type, read_format)) {
281 pr_debug("parsing failed for sample_type %#"PRIx64"\n",
289 if (ret && read_format)
290 pr_debug("read_format %#"PRIx64"\n", read_format);
295 * test__sample_parsing - test sample parsing.
297 * This function implements a test that synthesizes a sample event, parses it
298 * and then checks that the parsed sample matches the original sample. The test
299 * checks sample format bits separately and together. If the test passes %0 is
300 * returned, otherwise %-1 is returned.
302 int test__sample_parsing(struct test *test __maybe_unused, int subtest __maybe_unused)
304 const u64 rf[] = {4, 5, 6, 7, 12, 13, 14, 15};
311 * Fail the test if it has not been updated when new sample format bits
312 * were added. Please actually update the test rather than just change
313 * the condition below.
315 if (PERF_SAMPLE_MAX > PERF_SAMPLE_PHYS_ADDR << 1) {
316 pr_debug("sample format has changed, some new PERF_SAMPLE_ bit was introduced - test needs updating\n");
320 /* Test each sample format bit separately */
321 for (sample_type = 1; sample_type != PERF_SAMPLE_MAX;
323 /* Test read_format variations */
324 if (sample_type == PERF_SAMPLE_READ) {
325 for (i = 0; i < ARRAY_SIZE(rf); i++) {
326 err = do_test(sample_type, 0, rf[i]);
334 if (sample_type == PERF_SAMPLE_REGS_USER)
335 sample_regs = 0x3fff;
337 if (sample_type == PERF_SAMPLE_REGS_INTR)
338 sample_regs = 0xff0fff;
340 err = do_test(sample_type, sample_regs, 0);
345 /* Test all sample format bits together */
346 sample_type = PERF_SAMPLE_MAX - 1;
347 sample_regs = 0x3fff; /* shared yb intr and user regs */
348 for (i = 0; i < ARRAY_SIZE(rf); i++) {
349 err = do_test(sample_type, sample_regs, rf[i]);