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