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 for (i = 0; i < s1->branch_stack->nr; i++)
103 MCOMP(branch_stack->entries[i]);
104 }
105
106 if (type & PERF_SAMPLE_REGS_USER) {
107 size_t sz = hweight_long(s1->user_regs.mask) * sizeof(u64);
108
109 COMP(user_regs.mask);
110 COMP(user_regs.abi);
111 if (s1->user_regs.abi &&
112 (!s1->user_regs.regs || !s2->user_regs.regs ||
113 memcmp(s1->user_regs.regs, s2->user_regs.regs, sz))) {
114 pr_debug("Samples differ at 'user_regs'\n");
115 return false;
116 }
117 }
118
119 if (type & PERF_SAMPLE_STACK_USER) {
120 COMP(user_stack.size);
121 if (memcmp(s1->user_stack.data, s2->user_stack.data,
122 s1->user_stack.size)) {
123 pr_debug("Samples differ at 'user_stack'\n");
124 return false;
125 }
126 }
127
128 if (type & PERF_SAMPLE_WEIGHT)
129 COMP(weight);
130
131 if (type & PERF_SAMPLE_DATA_SRC)
132 COMP(data_src);
133
134 if (type & PERF_SAMPLE_TRANSACTION)
135 COMP(transaction);
136
137 if (type & PERF_SAMPLE_REGS_INTR) {
138 size_t sz = hweight_long(s1->intr_regs.mask) * sizeof(u64);
139
140 COMP(intr_regs.mask);
141 COMP(intr_regs.abi);
142 if (s1->intr_regs.abi &&
143 (!s1->intr_regs.regs || !s2->intr_regs.regs ||
144 memcmp(s1->intr_regs.regs, s2->intr_regs.regs, sz))) {
145 pr_debug("Samples differ at 'intr_regs'\n");
146 return false;
147 }
148 }
149
150 if (type & PERF_SAMPLE_PHYS_ADDR)
151 COMP(phys_addr);
152
153 if (type & PERF_SAMPLE_AUX) {
154 COMP(aux_sample.size);
155 if (memcmp(s1->aux_sample.data, s2->aux_sample.data,
156 s1->aux_sample.size)) {
157 pr_debug("Samples differ at 'aux_sample'\n");
158 return false;
159 }
160 }
161
162 return true;
163}
164
165static int do_test(u64 sample_type, u64 sample_regs, u64 read_format)
166{
167 struct evsel evsel = {
168 .needs_swap = false,
169 .core = {
170 . attr = {
171 .sample_type = sample_type,
172 .read_format = read_format,
173 },
174 },
175 };
176 union perf_event *event;
177 union {
178 struct ip_callchain callchain;
179 u64 data[64];
180 } callchain = {
181
182 .data = {3, 201, 202, 203},
183 };
184 union {
185 struct branch_stack branch_stack;
186 u64 data[64];
187 } branch_stack = {
188
189 .data = {1, 211, 212, 213},
190 };
191 u64 regs[64];
192 const u64 raw_data[] = {0x123456780a0b0c0dULL, 0x1102030405060708ULL};
193 const u64 data[] = {0x2211443366558877ULL, 0, 0xaabbccddeeff4321ULL};
194 const u64 aux_data[] = {0xa55a, 0, 0xeeddee, 0x0282028202820282};
195 struct perf_sample sample = {
196 .ip = 101,
197 .pid = 102,
198 .tid = 103,
199 .time = 104,
200 .addr = 105,
201 .id = 106,
202 .stream_id = 107,
203 .period = 108,
204 .weight = 109,
205 .cpu = 110,
206 .raw_size = sizeof(raw_data),
207 .data_src = 111,
208 .transaction = 112,
209 .raw_data = (void *)raw_data,
210 .callchain = &callchain.callchain,
211 .branch_stack = &branch_stack.branch_stack,
212 .user_regs = {
213 .abi = PERF_SAMPLE_REGS_ABI_64,
214 .mask = sample_regs,
215 .regs = regs,
216 },
217 .user_stack = {
218 .size = sizeof(data),
219 .data = (void *)data,
220 },
221 .read = {
222 .time_enabled = 0x030a59d664fca7deULL,
223 .time_running = 0x011b6ae553eb98edULL,
224 },
225 .intr_regs = {
226 .abi = PERF_SAMPLE_REGS_ABI_64,
227 .mask = sample_regs,
228 .regs = regs,
229 },
230 .phys_addr = 113,
231 .aux_sample = {
232 .size = sizeof(aux_data),
233 .data = (void *)aux_data,
234 },
235 };
236 struct sample_read_value values[] = {{1, 5}, {9, 3}, {2, 7}, {6, 4},};
237 struct perf_sample sample_out;
238 size_t i, sz, bufsz;
239 int err, ret = -1;
240
241 if (sample_type & PERF_SAMPLE_REGS_USER)
242 evsel.core.attr.sample_regs_user = sample_regs;
243
244 if (sample_type & PERF_SAMPLE_REGS_INTR)
245 evsel.core.attr.sample_regs_intr = sample_regs;
246
247 for (i = 0; i < sizeof(regs); i++)
248 *(i + (u8 *)regs) = i & 0xfe;
249
250 if (read_format & PERF_FORMAT_GROUP) {
251 sample.read.group.nr = 4;
252 sample.read.group.values = values;
253 } else {
254 sample.read.one.value = 0x08789faeb786aa87ULL;
255 sample.read.one.id = 99;
256 }
257
258 sz = perf_event__sample_event_size(&sample, sample_type, read_format);
259 bufsz = sz + 4096;
260 event = malloc(bufsz);
261 if (!event) {
262 pr_debug("malloc failed\n");
263 return -1;
264 }
265
266 memset(event, 0xff, bufsz);
267 event->header.type = PERF_RECORD_SAMPLE;
268 event->header.misc = 0;
269 event->header.size = sz;
270
271 err = perf_event__synthesize_sample(event, sample_type, read_format,
272 &sample);
273 if (err) {
274 pr_debug("%s failed for sample_type %#"PRIx64", error %d\n",
275 "perf_event__synthesize_sample", sample_type, err);
276 goto out_free;
277 }
278
279
280 for (i = bufsz; i > 0; i--) {
281 if (*(i - 1 + (u8 *)event) != 0xff)
282 break;
283 }
284 if (i != sz) {
285 pr_debug("Event size mismatch: actual %zu vs expected %zu\n",
286 i, sz);
287 goto out_free;
288 }
289
290 evsel.sample_size = __perf_evsel__sample_size(sample_type);
291
292 err = perf_evsel__parse_sample(&evsel, event, &sample_out);
293 if (err) {
294 pr_debug("%s failed for sample_type %#"PRIx64", error %d\n",
295 "perf_evsel__parse_sample", sample_type, err);
296 goto out_free;
297 }
298
299 if (!samples_same(&sample, &sample_out, sample_type, read_format)) {
300 pr_debug("parsing failed for sample_type %#"PRIx64"\n",
301 sample_type);
302 goto out_free;
303 }
304
305 ret = 0;
306out_free:
307 free(event);
308 if (ret && read_format)
309 pr_debug("read_format %#"PRIx64"\n", read_format);
310 return ret;
311}
312
313
314
315
316
317
318
319
320
321int test__sample_parsing(struct test *test __maybe_unused, int subtest __maybe_unused)
322{
323 const u64 rf[] = {4, 5, 6, 7, 12, 13, 14, 15};
324 u64 sample_type;
325 u64 sample_regs;
326 size_t i;
327 int err;
328
329
330
331
332
333
334 if (PERF_SAMPLE_MAX > PERF_SAMPLE_AUX << 1) {
335 pr_debug("sample format has changed, some new PERF_SAMPLE_ bit was introduced - test needs updating\n");
336 return -1;
337 }
338
339
340 for (sample_type = 1; sample_type != PERF_SAMPLE_MAX;
341 sample_type <<= 1) {
342
343 if (sample_type == PERF_SAMPLE_READ) {
344 for (i = 0; i < ARRAY_SIZE(rf); i++) {
345 err = do_test(sample_type, 0, rf[i]);
346 if (err)
347 return err;
348 }
349 continue;
350 }
351 sample_regs = 0;
352
353 if (sample_type == PERF_SAMPLE_REGS_USER)
354 sample_regs = 0x3fff;
355
356 if (sample_type == PERF_SAMPLE_REGS_INTR)
357 sample_regs = 0xff0fff;
358
359 err = do_test(sample_type, sample_regs, 0);
360 if (err)
361 return err;
362 }
363
364
365 sample_type = PERF_SAMPLE_MAX - 1;
366 sample_regs = 0x3fff;
367 for (i = 0; i < ARRAY_SIZE(rf); i++) {
368 err = do_test(sample_type, sample_regs, rf[i]);
369 if (err)
370 return err;
371 }
372
373 return 0;
374}
375
