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, s1->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 return true;
130}
131
132static int do_test(u64 sample_type, u64 sample_regs_user, u64 read_format)
133{
134 struct perf_evsel evsel = {
135 .needs_swap = false,
136 .attr = {
137 .sample_type = sample_type,
138 .sample_regs_user = sample_regs_user,
139 .read_format = read_format,
140 },
141 };
142 union perf_event *event;
143 union {
144 struct ip_callchain callchain;
145 u64 data[64];
146 } callchain = {
147
148 .data = {3, 201, 202, 203},
149 };
150 union {
151 struct branch_stack branch_stack;
152 u64 data[64];
153 } branch_stack = {
154
155 .data = {1, 211, 212, 213},
156 };
157 u64 user_regs[64];
158 const u64 raw_data[] = {0x123456780a0b0c0dULL, 0x1102030405060708ULL};
159 const u64 data[] = {0x2211443366558877ULL, 0, 0xaabbccddeeff4321ULL};
160 struct perf_sample sample = {
161 .ip = 101,
162 .pid = 102,
163 .tid = 103,
164 .time = 104,
165 .addr = 105,
166 .id = 106,
167 .stream_id = 107,
168 .period = 108,
169 .weight = 109,
170 .cpu = 110,
171 .raw_size = sizeof(raw_data),
172 .data_src = 111,
173 .transaction = 112,
174 .raw_data = (void *)raw_data,
175 .callchain = &callchain.callchain,
176 .branch_stack = &branch_stack.branch_stack,
177 .user_regs = {
178 .abi = PERF_SAMPLE_REGS_ABI_64,
179 .mask = sample_regs_user,
180 .regs = user_regs,
181 },
182 .user_stack = {
183 .size = sizeof(data),
184 .data = (void *)data,
185 },
186 .read = {
187 .time_enabled = 0x030a59d664fca7deULL,
188 .time_running = 0x011b6ae553eb98edULL,
189 },
190 };
191 struct sample_read_value values[] = {{1, 5}, {9, 3}, {2, 7}, {6, 4},};
192 struct perf_sample sample_out;
193 size_t i, sz, bufsz;
194 int err, ret = -1;
195
196 for (i = 0; i < sizeof(user_regs); i++)
197 *(i + (u8 *)user_regs) = i & 0xfe;
198
199 if (read_format & PERF_FORMAT_GROUP) {
200 sample.read.group.nr = 4;
201 sample.read.group.values = values;
202 } else {
203 sample.read.one.value = 0x08789faeb786aa87ULL;
204 sample.read.one.id = 99;
205 }
206
207 sz = perf_event__sample_event_size(&sample, sample_type, read_format);
208 bufsz = sz + 4096;
209 event = malloc(bufsz);
210 if (!event) {
211 pr_debug("malloc failed\n");
212 return -1;
213 }
214
215 memset(event, 0xff, bufsz);
216 event->header.type = PERF_RECORD_SAMPLE;
217 event->header.misc = 0;
218 event->header.size = sz;
219
220 err = perf_event__synthesize_sample(event, sample_type, read_format,
221 &sample, false);
222 if (err) {
223 pr_debug("%s failed for sample_type %#"PRIx64", error %d\n",
224 "perf_event__synthesize_sample", sample_type, err);
225 goto out_free;
226 }
227
228
229 for (i = bufsz; i > 0; i--) {
230 if (*(i - 1 + (u8 *)event) != 0xff)
231 break;
232 }
233 if (i != sz) {
234 pr_debug("Event size mismatch: actual %zu vs expected %zu\n",
235 i, sz);
236 goto out_free;
237 }
238
239 evsel.sample_size = __perf_evsel__sample_size(sample_type);
240
241 err = perf_evsel__parse_sample(&evsel, event, &sample_out);
242 if (err) {
243 pr_debug("%s failed for sample_type %#"PRIx64", error %d\n",
244 "perf_evsel__parse_sample", sample_type, err);
245 goto out_free;
246 }
247
248 if (!samples_same(&sample, &sample_out, sample_type, read_format)) {
249 pr_debug("parsing failed for sample_type %#"PRIx64"\n",
250 sample_type);
251 goto out_free;
252 }
253
254 ret = 0;
255out_free:
256 free(event);
257 if (ret && read_format)
258 pr_debug("read_format %#"PRIx64"\n", read_format);
259 return ret;
260}
261
262
263
264
265
266
267
268
269
270int test__sample_parsing(void)
271{
272 const u64 rf[] = {4, 5, 6, 7, 12, 13, 14, 15};
273 u64 sample_type;
274 u64 sample_regs_user;
275 size_t i;
276 int err;
277
278
279
280
281
282
283 if (PERF_SAMPLE_MAX > PERF_SAMPLE_TRANSACTION << 1) {
284 pr_debug("sample format has changed, some new PERF_SAMPLE_ bit was introduced - test needs updating\n");
285 return -1;
286 }
287
288
289 for (sample_type = 1; sample_type != PERF_SAMPLE_MAX;
290 sample_type <<= 1) {
291
292 if (sample_type == PERF_SAMPLE_READ) {
293 for (i = 0; i < ARRAY_SIZE(rf); i++) {
294 err = do_test(sample_type, 0, rf[i]);
295 if (err)
296 return err;
297 }
298 continue;
299 }
300
301 if (sample_type == PERF_SAMPLE_REGS_USER)
302 sample_regs_user = 0x3fff;
303 else
304 sample_regs_user = 0;
305
306 err = do_test(sample_type, sample_regs_user, 0);
307 if (err)
308 return err;
309 }
310
311
312 sample_type = PERF_SAMPLE_MAX - 1;
313 sample_regs_user = 0x3fff;
314 for (i = 0; i < ARRAY_SIZE(rf); i++) {
315 err = do_test(sample_type, sample_regs_user, rf[i]);
316 if (err)
317 return err;
318 }
319
320 return 0;
321}
322
