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