1
2#include <stdbool.h>
3#include <inttypes.h>
4#include <stdlib.h>
5#include <string.h>
6#include <linux/bitops.h>
7#include <linux/kernel.h>
8#include <linux/types.h>
9
10#include "map_symbol.h"
11#include "branch.h"
12#include "event.h"
13#include "evsel.h"
14#include "debug.h"
15#include "util/synthetic-events.h"
16
17#include "tests.h"
18
19#define COMP(m) do { \
20 if (s1->m != s2->m) { \
21 pr_debug("Samples differ at '"#m"'\n"); \
22 return false; \
23 } \
24} while (0)
25
26#define MCOMP(m) do { \
27 if (memcmp(&s1->m, &s2->m, sizeof(s1->m))) { \
28 pr_debug("Samples differ at '"#m"'\n"); \
29 return false; \
30 } \
31} while (0)
32
33static bool samples_same(const struct perf_sample *s1,
34 const struct perf_sample *s2,
35 u64 type, u64 read_format)
36{
37 size_t i;
38
39 if (type & PERF_SAMPLE_IDENTIFIER)
40 COMP(id);
41
42 if (type & PERF_SAMPLE_IP)
43 COMP(ip);
44
45 if (type & PERF_SAMPLE_TID) {
46 COMP(pid);
47 COMP(tid);
48 }
49
50 if (type & PERF_SAMPLE_TIME)
51 COMP(time);
52
53 if (type & PERF_SAMPLE_ADDR)
54 COMP(addr);
55
56 if (type & PERF_SAMPLE_ID)
57 COMP(id);
58
59 if (type & PERF_SAMPLE_STREAM_ID)
60 COMP(stream_id);
61
62 if (type & PERF_SAMPLE_CPU)
63 COMP(cpu);
64
65 if (type & PERF_SAMPLE_PERIOD)
66 COMP(period);
67
68 if (type & PERF_SAMPLE_READ) {
69 if (read_format & PERF_FORMAT_GROUP)
70 COMP(read.group.nr);
71 else
72 COMP(read.one.value);
73 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
74 COMP(read.time_enabled);
75 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
76 COMP(read.time_running);
77
78 if (read_format & PERF_FORMAT_GROUP) {
79 for (i = 0; i < s1->read.group.nr; i++)
80 MCOMP(read.group.values[i]);
81 } else {
82 COMP(read.one.id);
83 }
84 }
85
86 if (type & PERF_SAMPLE_CALLCHAIN) {
87 COMP(callchain->nr);
88 for (i = 0; i < s1->callchain->nr; i++)
89 COMP(callchain->ips[i]);
90 }
91
92 if (type & PERF_SAMPLE_RAW) {
93 COMP(raw_size);
94 if (memcmp(s1->raw_data, s2->raw_data, s1->raw_size)) {
95 pr_debug("Samples differ at 'raw_data'\n");
96 return false;
97 }
98 }
99
100 if (type & PERF_SAMPLE_BRANCH_STACK) {
101 COMP(branch_stack->nr);
102 COMP(branch_stack->hw_idx);
103 for (i = 0; i < s1->branch_stack->nr; i++)
104 MCOMP(branch_stack->entries[i]);
105 }
106
107 if (type & PERF_SAMPLE_REGS_USER) {
108 size_t sz = hweight_long(s1->user_regs.mask) * sizeof(u64);
109
110 COMP(user_regs.mask);
111 COMP(user_regs.abi);
112 if (s1->user_regs.abi &&
113 (!s1->user_regs.regs || !s2->user_regs.regs ||
114 memcmp(s1->user_regs.regs, s2->user_regs.regs, sz))) {
115 pr_debug("Samples differ at 'user_regs'\n");
116 return false;
117 }
118 }
119
120 if (type & PERF_SAMPLE_STACK_USER) {
121 COMP(user_stack.size);
122 if (memcmp(s1->user_stack.data, s2->user_stack.data,
123 s1->user_stack.size)) {
124 pr_debug("Samples differ at 'user_stack'\n");
125 return false;
126 }
127 }
128
129 if (type & PERF_SAMPLE_WEIGHT)
130 COMP(weight);
131
132 if (type & PERF_SAMPLE_DATA_SRC)
133 COMP(data_src);
134
135 if (type & PERF_SAMPLE_TRANSACTION)
136 COMP(transaction);
137
138 if (type & PERF_SAMPLE_REGS_INTR) {
139 size_t sz = hweight_long(s1->intr_regs.mask) * sizeof(u64);
140
141 COMP(intr_regs.mask);
142 COMP(intr_regs.abi);
143 if (s1->intr_regs.abi &&
144 (!s1->intr_regs.regs || !s2->intr_regs.regs ||
145 memcmp(s1->intr_regs.regs, s2->intr_regs.regs, sz))) {
146 pr_debug("Samples differ at 'intr_regs'\n");
147 return false;
148 }
149 }
150
151 if (type & PERF_SAMPLE_PHYS_ADDR)
152 COMP(phys_addr);
153
154 if (type & PERF_SAMPLE_CGROUP)
155 COMP(cgroup);
156
157 if (type & PERF_SAMPLE_AUX) {
158 COMP(aux_sample.size);
159 if (memcmp(s1->aux_sample.data, s2->aux_sample.data,
160 s1->aux_sample.size)) {
161 pr_debug("Samples differ at 'aux_sample'\n");
162 return false;
163 }
164 }
165
166 return true;
167}
168
169static int do_test(u64 sample_type, u64 sample_regs, u64 read_format)
170{
171 struct evsel evsel = {
172 .needs_swap = false,
173 .core = {
174 . attr = {
175 .sample_type = sample_type,
176 .read_format = read_format,
177 },
178 },
179 };
180 union perf_event *event;
181 union {
182 struct ip_callchain callchain;
183 u64 data[64];
184 } callchain = {
185
186 .data = {3, 201, 202, 203},
187 };
188 union {
189 struct branch_stack branch_stack;
190 u64 data[64];
191 } branch_stack = {
192
193 .data = {1, -1ULL, 211, 212, 213},
194 };
195 u64 regs[64];
196 const u64 raw_data[] = {0x123456780a0b0c0dULL, 0x1102030405060708ULL};
197 const u64 data[] = {0x2211443366558877ULL, 0, 0xaabbccddeeff4321ULL};
198 const u64 aux_data[] = {0xa55a, 0, 0xeeddee, 0x0282028202820282};
199 struct perf_sample sample = {
200 .ip = 101,
201 .pid = 102,
202 .tid = 103,
203 .time = 104,
204 .addr = 105,
205 .id = 106,
206 .stream_id = 107,
207 .period = 108,
208 .weight = 109,
209 .cpu = 110,
210 .raw_size = sizeof(raw_data),
211 .data_src = 111,
212 .transaction = 112,
213 .raw_data = (void *)raw_data,
214 .callchain = &callchain.callchain,
215 .no_hw_idx = false,
216 .branch_stack = &branch_stack.branch_stack,
217 .user_regs = {
218 .abi = PERF_SAMPLE_REGS_ABI_64,
219 .mask = sample_regs,
220 .regs = regs,
221 },
222 .user_stack = {
223 .size = sizeof(data),
224 .data = (void *)data,
225 },
226 .read = {
227 .time_enabled = 0x030a59d664fca7deULL,
228 .time_running = 0x011b6ae553eb98edULL,
229 },
230 .intr_regs = {
231 .abi = PERF_SAMPLE_REGS_ABI_64,
232 .mask = sample_regs,
233 .regs = regs,
234 },
235 .phys_addr = 113,
236 .cgroup = 114,
237 .aux_sample = {
238 .size = sizeof(aux_data),
239 .data = (void *)aux_data,
240 },
241 };
242 struct sample_read_value values[] = {{1, 5}, {9, 3}, {2, 7}, {6, 4},};
243 struct perf_sample sample_out;
244 size_t i, sz, bufsz;
245 int err, ret = -1;
246
247 if (sample_type & PERF_SAMPLE_REGS_USER)
248 evsel.core.attr.sample_regs_user = sample_regs;
249
250 if (sample_type & PERF_SAMPLE_REGS_INTR)
251 evsel.core.attr.sample_regs_intr = sample_regs;
252
253 if (sample_type & PERF_SAMPLE_BRANCH_STACK)
254 evsel.core.attr.branch_sample_type |= PERF_SAMPLE_BRANCH_HW_INDEX;
255
256 for (i = 0; i < sizeof(regs); i++)
257 *(i + (u8 *)regs) = i & 0xfe;
258
259 if (read_format & PERF_FORMAT_GROUP) {
260 sample.read.group.nr = 4;
261 sample.read.group.values = values;
262 } else {
263 sample.read.one.value = 0x08789faeb786aa87ULL;
264 sample.read.one.id = 99;
265 }
266
267 sz = perf_event__sample_event_size(&sample, sample_type, read_format);
268 bufsz = sz + 4096;
269 event = malloc(bufsz);
270 if (!event) {
271 pr_debug("malloc failed\n");
272 return -1;
273 }
274
275 memset(event, 0xff, bufsz);
276 event->header.type = PERF_RECORD_SAMPLE;
277 event->header.misc = 0;
278 event->header.size = sz;
279
280 err = perf_event__synthesize_sample(event, sample_type, read_format,
281 &sample);
282 if (err) {
283 pr_debug("%s failed for sample_type %#"PRIx64", error %d\n",
284 "perf_event__synthesize_sample", sample_type, err);
285 goto out_free;
286 }
287
288
289 for (i = bufsz; i > 0; i--) {
290 if (*(i - 1 + (u8 *)event) != 0xff)
291 break;
292 }
293 if (i != sz) {
294 pr_debug("Event size mismatch: actual %zu vs expected %zu\n",
295 i, sz);
296 goto out_free;
297 }
298
299 evsel.sample_size = __evsel__sample_size(sample_type);
300
301 err = evsel__parse_sample(&evsel, event, &sample_out);
302 if (err) {
303 pr_debug("%s failed for sample_type %#"PRIx64", error %d\n",
304 "evsel__parse_sample", sample_type, err);
305 goto out_free;
306 }
307
308 if (!samples_same(&sample, &sample_out, sample_type, read_format)) {
309 pr_debug("parsing failed for sample_type %#"PRIx64"\n",
310 sample_type);
311 goto out_free;
312 }
313
314 ret = 0;
315out_free:
316 free(event);
317 if (ret && read_format)
318 pr_debug("read_format %#"PRIx64"\n", read_format);
319 return ret;
320}
321
322
323
324
325
326
327
328
329
330int test__sample_parsing(struct test *test __maybe_unused, int subtest __maybe_unused)
331{
332 const u64 rf[] = {4, 5, 6, 7, 12, 13, 14, 15};
333 u64 sample_type;
334 u64 sample_regs;
335 size_t i;
336 int err;
337
338
339
340
341
342
343 if (PERF_SAMPLE_MAX > PERF_SAMPLE_CGROUP << 1) {
344 pr_debug("sample format has changed, some new PERF_SAMPLE_ bit was introduced - test needs updating\n");
345 return -1;
346 }
347
348
349 for (sample_type = 1; sample_type != PERF_SAMPLE_MAX;
350 sample_type <<= 1) {
351
352 if (sample_type == PERF_SAMPLE_READ) {
353 for (i = 0; i < ARRAY_SIZE(rf); i++) {
354 err = do_test(sample_type, 0, rf[i]);
355 if (err)
356 return err;
357 }
358 continue;
359 }
360 sample_regs = 0;
361
362 if (sample_type == PERF_SAMPLE_REGS_USER)
363 sample_regs = 0x3fff;
364
365 if (sample_type == PERF_SAMPLE_REGS_INTR)
366 sample_regs = 0xff0fff;
367
368 err = do_test(sample_type, sample_regs, 0);
369 if (err)
370 return err;
371 }
372
373
374 sample_type = PERF_SAMPLE_MAX - 1;
375 sample_regs = 0x3fff;
376 for (i = 0; i < ARRAY_SIZE(rf); i++) {
377 err = do_test(sample_type, sample_regs, rf[i]);
378 if (err)
379 return err;
380 }
381
382 return 0;
383}
384
