1 // SPDX-License-Identifier: GPL-2.0
4 #include <linux/kernel.h>
5 #include <linux/types.h>
14 #define COMP(m) do { \
15 if (s1->m != s2->m) { \
16 pr_debug("Samples differ at '"#m"'\n"); \
21 #define MCOMP(m) do { \
22 if (memcmp(&s1->m, &s2->m, sizeof(s1->m))) { \
23 pr_debug("Samples differ at '"#m"'\n"); \
28 static bool samples_same(const struct perf_sample *s1,
29 const struct perf_sample *s2,
30 u64 type, u64 read_format)
34 if (type & PERF_SAMPLE_IDENTIFIER)
37 if (type & PERF_SAMPLE_IP)
40 if (type & PERF_SAMPLE_TID) {
45 if (type & PERF_SAMPLE_TIME)
48 if (type & PERF_SAMPLE_ADDR)
51 if (type & PERF_SAMPLE_ID)
54 if (type & PERF_SAMPLE_STREAM_ID)
57 if (type & PERF_SAMPLE_CPU)
60 if (type & PERF_SAMPLE_PERIOD)
63 if (type & PERF_SAMPLE_READ) {
64 if (read_format & PERF_FORMAT_GROUP)
68 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
69 COMP(read.time_enabled);
70 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
71 COMP(read.time_running);
72 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */
73 if (read_format & PERF_FORMAT_GROUP) {
74 for (i = 0; i < s1->read.group.nr; i++)
75 MCOMP(read.group.values[i]);
81 if (type & PERF_SAMPLE_CALLCHAIN) {
83 for (i = 0; i < s1->callchain->nr; i++)
84 COMP(callchain->ips[i]);
87 if (type & PERF_SAMPLE_RAW) {
89 if (memcmp(s1->raw_data, s2->raw_data, s1->raw_size)) {
90 pr_debug("Samples differ at 'raw_data'\n");
95 if (type & PERF_SAMPLE_BRANCH_STACK) {
96 COMP(branch_stack->nr);
97 for (i = 0; i < s1->branch_stack->nr; i++)
98 MCOMP(branch_stack->entries[i]);
101 if (type & PERF_SAMPLE_REGS_USER) {
102 size_t sz = hweight_long(s1->user_regs.mask) * sizeof(u64);
104 COMP(user_regs.mask);
106 if (s1->user_regs.abi &&
107 (!s1->user_regs.regs || !s2->user_regs.regs ||
108 memcmp(s1->user_regs.regs, s2->user_regs.regs, sz))) {
109 pr_debug("Samples differ at 'user_regs'\n");
114 if (type & PERF_SAMPLE_STACK_USER) {
115 COMP(user_stack.size);
116 if (memcmp(s1->user_stack.data, s2->user_stack.data,
117 s1->user_stack.size)) {
118 pr_debug("Samples differ at 'user_stack'\n");
123 if (type & PERF_SAMPLE_WEIGHT)
126 if (type & PERF_SAMPLE_DATA_SRC)
129 if (type & PERF_SAMPLE_TRANSACTION)
132 if (type & PERF_SAMPLE_REGS_INTR) {
133 size_t sz = hweight_long(s1->intr_regs.mask) * sizeof(u64);
135 COMP(intr_regs.mask);
137 if (s1->intr_regs.abi &&
138 (!s1->intr_regs.regs || !s2->intr_regs.regs ||
139 memcmp(s1->intr_regs.regs, s2->intr_regs.regs, sz))) {
140 pr_debug("Samples differ at 'intr_regs'\n");
145 if (type & PERF_SAMPLE_PHYS_ADDR)
151 static int do_test(u64 sample_type, u64 sample_regs, u64 read_format)
153 struct perf_evsel evsel = {
156 .sample_type = sample_type,
157 .read_format = read_format,
160 union perf_event *event;
162 struct ip_callchain callchain;
166 .data = {3, 201, 202, 203},
169 struct branch_stack branch_stack;
173 .data = {1, 211, 212, 213},
176 const u32 raw_data[] = {0x12345678, 0x0a0b0c0d, 0x11020304, 0x05060708, 0 };
177 const u64 data[] = {0x2211443366558877ULL, 0, 0xaabbccddeeff4321ULL};
178 struct perf_sample sample = {
189 .raw_size = sizeof(raw_data),
192 .raw_data = (void *)raw_data,
193 .callchain = &callchain.callchain,
194 .branch_stack = &branch_stack.branch_stack,
196 .abi = PERF_SAMPLE_REGS_ABI_64,
201 .size = sizeof(data),
202 .data = (void *)data,
205 .time_enabled = 0x030a59d664fca7deULL,
206 .time_running = 0x011b6ae553eb98edULL,
209 .abi = PERF_SAMPLE_REGS_ABI_64,
215 struct sample_read_value values[] = {{1, 5}, {9, 3}, {2, 7}, {6, 4},};
216 struct perf_sample sample_out;
220 if (sample_type & PERF_SAMPLE_REGS_USER)
221 evsel.attr.sample_regs_user = sample_regs;
223 if (sample_type & PERF_SAMPLE_REGS_INTR)
224 evsel.attr.sample_regs_intr = sample_regs;
226 for (i = 0; i < sizeof(regs); i++)
227 *(i + (u8 *)regs) = i & 0xfe;
229 if (read_format & PERF_FORMAT_GROUP) {
230 sample.read.group.nr = 4;
231 sample.read.group.values = values;
233 sample.read.one.value = 0x08789faeb786aa87ULL;
234 sample.read.one.id = 99;
237 sz = perf_event__sample_event_size(&sample, sample_type, read_format);
238 bufsz = sz + 4096; /* Add a bit for overrun checking */
239 event = malloc(bufsz);
241 pr_debug("malloc failed\n");
245 memset(event, 0xff, bufsz);
246 event->header.type = PERF_RECORD_SAMPLE;
247 event->header.misc = 0;
248 event->header.size = sz;
250 err = perf_event__synthesize_sample(event, sample_type, read_format,
253 pr_debug("%s failed for sample_type %#"PRIx64", error %d\n",
254 "perf_event__synthesize_sample", sample_type, err);
258 /* The data does not contain 0xff so we use that to check the size */
259 for (i = bufsz; i > 0; i--) {
260 if (*(i - 1 + (u8 *)event) != 0xff)
264 pr_debug("Event size mismatch: actual %zu vs expected %zu\n",
269 evsel.sample_size = __perf_evsel__sample_size(sample_type);
271 err = perf_evsel__parse_sample(&evsel, event, &sample_out);
273 pr_debug("%s failed for sample_type %#"PRIx64", error %d\n",
274 "perf_evsel__parse_sample", sample_type, err);
278 if (!samples_same(&sample, &sample_out, sample_type, read_format)) {
279 pr_debug("parsing failed for sample_type %#"PRIx64"\n",
287 if (ret && read_format)
288 pr_debug("read_format %#"PRIx64"\n", read_format);
293 * test__sample_parsing - test sample parsing.
295 * This function implements a test that synthesizes a sample event, parses it
296 * and then checks that the parsed sample matches the original sample. The test
297 * checks sample format bits separately and together. If the test passes %0 is
298 * returned, otherwise %-1 is returned.
300 int test__sample_parsing(struct test *test __maybe_unused, int subtest __maybe_unused)
302 const u64 rf[] = {4, 5, 6, 7, 12, 13, 14, 15};
309 * Fail the test if it has not been updated when new sample format bits
310 * were added. Please actually update the test rather than just change
311 * the condition below.
313 if (PERF_SAMPLE_MAX > PERF_SAMPLE_PHYS_ADDR << 1) {
314 pr_debug("sample format has changed, some new PERF_SAMPLE_ bit was introduced - test needs updating\n");
318 /* Test each sample format bit separately */
319 for (sample_type = 1; sample_type != PERF_SAMPLE_MAX;
321 /* Test read_format variations */
322 if (sample_type == PERF_SAMPLE_READ) {
323 for (i = 0; i < ARRAY_SIZE(rf); i++) {
324 err = do_test(sample_type, 0, rf[i]);
332 if (sample_type == PERF_SAMPLE_REGS_USER)
333 sample_regs = 0x3fff;
335 if (sample_type == PERF_SAMPLE_REGS_INTR)
336 sample_regs = 0xff0fff;
338 err = do_test(sample_type, sample_regs, 0);
343 /* Test all sample format bits together */
344 sample_type = PERF_SAMPLE_MAX - 1;
345 sample_regs = 0x3fff; /* shared yb intr and user regs */
346 for (i = 0; i < ARRAY_SIZE(rf); i++) {
347 err = do_test(sample_type, sample_regs, rf[i]);