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