1 // SPDX-License-Identifier: GPL-2.0
6 #include <linux/bitops.h>
7 #include <linux/kernel.h>
8 #include <linux/types.h>
18 #define COMP(m) do { \
19 if (s1->m != s2->m) { \
20 pr_debug("Samples differ at '"#m"'\n"); \
25 #define MCOMP(m) do { \
26 if (memcmp(&s1->m, &s2->m, sizeof(s1->m))) { \
27 pr_debug("Samples differ at '"#m"'\n"); \
32 static bool samples_same(const struct perf_sample *s1,
33 const struct perf_sample *s2,
34 u64 type, u64 read_format)
38 if (type & PERF_SAMPLE_IDENTIFIER)
41 if (type & PERF_SAMPLE_IP)
44 if (type & PERF_SAMPLE_TID) {
49 if (type & PERF_SAMPLE_TIME)
52 if (type & PERF_SAMPLE_ADDR)
55 if (type & PERF_SAMPLE_ID)
58 if (type & PERF_SAMPLE_STREAM_ID)
61 if (type & PERF_SAMPLE_CPU)
64 if (type & PERF_SAMPLE_PERIOD)
67 if (type & PERF_SAMPLE_READ) {
68 if (read_format & PERF_FORMAT_GROUP)
72 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
73 COMP(read.time_enabled);
74 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
75 COMP(read.time_running);
76 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
77 if (read_format & PERF_FORMAT_GROUP) {
78 for (i = 0; i < s1->read.group.nr; i++)
79 MCOMP(read.group.values[i]);
85 if (type & PERF_SAMPLE_CALLCHAIN) {
87 for (i = 0; i < s1->callchain->nr; i++)
88 COMP(callchain->ips[i]);
91 if (type & PERF_SAMPLE_RAW) {
93 if (memcmp(s1->raw_data, s2->raw_data, s1->raw_size)) {
94 pr_debug("Samples differ at 'raw_data'\n");
99 if (type & PERF_SAMPLE_BRANCH_STACK) {
100 COMP(branch_stack->nr);
101 for (i = 0; i < s1->branch_stack->nr; i++)
102 MCOMP(branch_stack->entries[i]);
105 if (type & PERF_SAMPLE_REGS_USER) {
106 size_t sz = hweight_long(s1->user_regs.mask) * sizeof(u64);
108 COMP(user_regs.mask);
110 if (s1->user_regs.abi &&
111 (!s1->user_regs.regs || !s2->user_regs.regs ||
112 memcmp(s1->user_regs.regs, s2->user_regs.regs, sz))) {
113 pr_debug("Samples differ at 'user_regs'\n");
118 if (type & PERF_SAMPLE_STACK_USER) {
119 COMP(user_stack.size);
120 if (memcmp(s1->user_stack.data, s2->user_stack.data,
121 s1->user_stack.size)) {
122 pr_debug("Samples differ at 'user_stack'\n");
127 if (type & PERF_SAMPLE_WEIGHT)
130 if (type & PERF_SAMPLE_DATA_SRC)
133 if (type & PERF_SAMPLE_TRANSACTION)
136 if (type & PERF_SAMPLE_REGS_INTR) {
137 size_t sz = hweight_long(s1->intr_regs.mask) * sizeof(u64);
139 COMP(intr_regs.mask);
141 if (s1->intr_regs.abi &&
142 (!s1->intr_regs.regs || !s2->intr_regs.regs ||
143 memcmp(s1->intr_regs.regs, s2->intr_regs.regs, sz))) {
144 pr_debug("Samples differ at 'intr_regs'\n");
149 if (type & PERF_SAMPLE_PHYS_ADDR)
155 static int do_test(u64 sample_type, u64 sample_regs, u64 read_format)
157 struct evsel evsel = {
161 .sample_type = sample_type,
162 .read_format = read_format,
166 union perf_event *event;
168 struct ip_callchain callchain;
172 .data = {3, 201, 202, 203},
175 struct branch_stack branch_stack;
179 .data = {1, 211, 212, 213},
182 const u64 raw_data[] = {0x123456780a0b0c0dULL, 0x1102030405060708ULL};
183 const u64 data[] = {0x2211443366558877ULL, 0, 0xaabbccddeeff4321ULL};
184 struct perf_sample sample = {
195 .raw_size = sizeof(raw_data),
198 .raw_data = (void *)raw_data,
199 .callchain = &callchain.callchain,
200 .branch_stack = &branch_stack.branch_stack,
202 .abi = PERF_SAMPLE_REGS_ABI_64,
207 .size = sizeof(data),
208 .data = (void *)data,
211 .time_enabled = 0x030a59d664fca7deULL,
212 .time_running = 0x011b6ae553eb98edULL,
215 .abi = PERF_SAMPLE_REGS_ABI_64,
221 struct sample_read_value values[] = {{1, 5}, {9, 3}, {2, 7}, {6, 4},};
222 struct perf_sample sample_out;
226 if (sample_type & PERF_SAMPLE_REGS_USER)
227 evsel.core.attr.sample_regs_user = sample_regs;
229 if (sample_type & PERF_SAMPLE_REGS_INTR)
230 evsel.core.attr.sample_regs_intr = sample_regs;
232 for (i = 0; i < sizeof(regs); i++)
233 *(i + (u8 *)regs) = i & 0xfe;
235 if (read_format & PERF_FORMAT_GROUP) {
236 sample.read.group.nr = 4;
237 sample.read.group.values = values;
239 sample.read.one.value = 0x08789faeb786aa87ULL;
240 sample.read.one.id = 99;
243 sz = perf_event__sample_event_size(&sample, sample_type, read_format);
244 bufsz = sz + 4096; /* Add a bit for overrun checking */
245 event = malloc(bufsz);
247 pr_debug("malloc failed\n");
251 memset(event, 0xff, bufsz);
252 event->header.type = PERF_RECORD_SAMPLE;
253 event->header.misc = 0;
254 event->header.size = sz;
256 err = perf_event__synthesize_sample(event, sample_type, read_format,
259 pr_debug("%s failed for sample_type %#"PRIx64", error %d\n",
260 "perf_event__synthesize_sample", sample_type, err);
264 /* The data does not contain 0xff so we use that to check the size */
265 for (i = bufsz; i > 0; i--) {
266 if (*(i - 1 + (u8 *)event) != 0xff)
270 pr_debug("Event size mismatch: actual %zu vs expected %zu\n",
275 evsel.sample_size = __perf_evsel__sample_size(sample_type);
277 err = perf_evsel__parse_sample(&evsel, event, &sample_out);
279 pr_debug("%s failed for sample_type %#"PRIx64", error %d\n",
280 "perf_evsel__parse_sample", sample_type, err);
284 if (!samples_same(&sample, &sample_out, sample_type, read_format)) {
285 pr_debug("parsing failed for sample_type %#"PRIx64"\n",
293 if (ret && read_format)
294 pr_debug("read_format %#"PRIx64"\n", read_format);
299 * test__sample_parsing - test sample parsing.
301 * This function implements a test that synthesizes a sample event, parses it
302 * and then checks that the parsed sample matches the original sample. The test
303 * checks sample format bits separately and together. If the test passes %0 is
304 * returned, otherwise %-1 is returned.
306 int test__sample_parsing(struct test *test __maybe_unused, int subtest __maybe_unused)
308 const u64 rf[] = {4, 5, 6, 7, 12, 13, 14, 15};
315 * Fail the test if it has not been updated when new sample format bits
316 * were added. Please actually update the test rather than just change
317 * the condition below.
319 if (PERF_SAMPLE_MAX > PERF_SAMPLE_PHYS_ADDR << 1) {
320 pr_debug("sample format has changed, some new PERF_SAMPLE_ bit was introduced - test needs updating\n");
324 /* Test each sample format bit separately */
325 for (sample_type = 1; sample_type != PERF_SAMPLE_MAX;
327 /* Test read_format variations */
328 if (sample_type == PERF_SAMPLE_READ) {
329 for (i = 0; i < ARRAY_SIZE(rf); i++) {
330 err = do_test(sample_type, 0, rf[i]);
338 if (sample_type == PERF_SAMPLE_REGS_USER)
339 sample_regs = 0x3fff;
341 if (sample_type == PERF_SAMPLE_REGS_INTR)
342 sample_regs = 0xff0fff;
344 err = do_test(sample_type, sample_regs, 0);
349 /* Test all sample format bits together */
350 sample_type = PERF_SAMPLE_MAX - 1;
351 sample_regs = 0x3fff; /* shared yb intr and user regs */
352 for (i = 0; i < ARRAY_SIZE(rf); i++) {
353 err = do_test(sample_type, sample_regs, rf[i]);