1 // SPDX-License-Identifier: GPL-2.0 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 #include "util/trace-event.h" 17 18 #include "tests.h" 19 20 #define COMP(m) do { \ 21 if (s1->m != s2->m) { \ 22 pr_debug("Samples differ at '"#m"'\n"); \ 23 return false; \ 24 } \ 25 } while (0) 26 27 #define MCOMP(m) do { \ 28 if (memcmp(&s1->m, &s2->m, sizeof(s1->m))) { \ 29 pr_debug("Samples differ at '"#m"'\n"); \ 30 return false; \ 31 } \ 32 } while (0) 33 34 /* 35 * Hardcode the expected values for branch_entry flags. 36 * These are based on the input value (213) specified 37 * in branch_stack variable. 38 */ 39 #define BS_EXPECTED_BE 0xa000d00000000000 40 #define BS_EXPECTED_LE 0xd5000000 41 #define FLAG(s) s->branch_stack->entries[i].flags 42 43 static bool samples_same(const struct perf_sample *s1, 44 const struct perf_sample *s2, 45 u64 type, u64 read_format, bool needs_swap) 46 { 47 size_t i; 48 49 if (type & PERF_SAMPLE_IDENTIFIER) 50 COMP(id); 51 52 if (type & PERF_SAMPLE_IP) 53 COMP(ip); 54 55 if (type & PERF_SAMPLE_TID) { 56 COMP(pid); 57 COMP(tid); 58 } 59 60 if (type & PERF_SAMPLE_TIME) 61 COMP(time); 62 63 if (type & PERF_SAMPLE_ADDR) 64 COMP(addr); 65 66 if (type & PERF_SAMPLE_ID) 67 COMP(id); 68 69 if (type & PERF_SAMPLE_STREAM_ID) 70 COMP(stream_id); 71 72 if (type & PERF_SAMPLE_CPU) 73 COMP(cpu); 74 75 if (type & PERF_SAMPLE_PERIOD) 76 COMP(period); 77 78 if (type & PERF_SAMPLE_READ) { 79 if (read_format & PERF_FORMAT_GROUP) 80 COMP(read.group.nr); 81 else 82 COMP(read.one.value); 83 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 84 COMP(read.time_enabled); 85 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 86 COMP(read.time_running); 87 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */ 88 if (read_format & PERF_FORMAT_GROUP) { 89 for (i = 0; i < s1->read.group.nr; i++) { 90 /* FIXME: check values without LOST */ 91 if (read_format & PERF_FORMAT_LOST) 92 MCOMP(read.group.values[i]); 93 } 94 } else { 95 COMP(read.one.id); 96 if (read_format & PERF_FORMAT_LOST) 97 COMP(read.one.lost); 98 } 99 } 100 101 if (type & PERF_SAMPLE_CALLCHAIN) { 102 COMP(callchain->nr); 103 for (i = 0; i < s1->callchain->nr; i++) 104 COMP(callchain->ips[i]); 105 } 106 107 if (type & PERF_SAMPLE_RAW) { 108 COMP(raw_size); 109 if (memcmp(s1->raw_data, s2->raw_data, s1->raw_size)) { 110 pr_debug("Samples differ at 'raw_data'\n"); 111 return false; 112 } 113 } 114 115 if (type & PERF_SAMPLE_BRANCH_STACK) { 116 COMP(branch_stack->nr); 117 COMP(branch_stack->hw_idx); 118 for (i = 0; i < s1->branch_stack->nr; i++) { 119 if (needs_swap) 120 return ((tep_is_bigendian()) ? 121 (FLAG(s2).value == BS_EXPECTED_BE) : 122 (FLAG(s2).value == BS_EXPECTED_LE)); 123 else 124 MCOMP(branch_stack->entries[i]); 125 } 126 } 127 128 if (type & PERF_SAMPLE_REGS_USER) { 129 size_t sz = hweight_long(s1->user_regs.mask) * sizeof(u64); 130 131 COMP(user_regs.mask); 132 COMP(user_regs.abi); 133 if (s1->user_regs.abi && 134 (!s1->user_regs.regs || !s2->user_regs.regs || 135 memcmp(s1->user_regs.regs, s2->user_regs.regs, sz))) { 136 pr_debug("Samples differ at 'user_regs'\n"); 137 return false; 138 } 139 } 140 141 if (type & PERF_SAMPLE_STACK_USER) { 142 COMP(user_stack.size); 143 if (memcmp(s1->user_stack.data, s2->user_stack.data, 144 s1->user_stack.size)) { 145 pr_debug("Samples differ at 'user_stack'\n"); 146 return false; 147 } 148 } 149 150 if (type & PERF_SAMPLE_WEIGHT) 151 COMP(weight); 152 153 if (type & PERF_SAMPLE_DATA_SRC) 154 COMP(data_src); 155 156 if (type & PERF_SAMPLE_TRANSACTION) 157 COMP(transaction); 158 159 if (type & PERF_SAMPLE_REGS_INTR) { 160 size_t sz = hweight_long(s1->intr_regs.mask) * sizeof(u64); 161 162 COMP(intr_regs.mask); 163 COMP(intr_regs.abi); 164 if (s1->intr_regs.abi && 165 (!s1->intr_regs.regs || !s2->intr_regs.regs || 166 memcmp(s1->intr_regs.regs, s2->intr_regs.regs, sz))) { 167 pr_debug("Samples differ at 'intr_regs'\n"); 168 return false; 169 } 170 } 171 172 if (type & PERF_SAMPLE_PHYS_ADDR) 173 COMP(phys_addr); 174 175 if (type & PERF_SAMPLE_CGROUP) 176 COMP(cgroup); 177 178 if (type & PERF_SAMPLE_DATA_PAGE_SIZE) 179 COMP(data_page_size); 180 181 if (type & PERF_SAMPLE_CODE_PAGE_SIZE) 182 COMP(code_page_size); 183 184 if (type & PERF_SAMPLE_AUX) { 185 COMP(aux_sample.size); 186 if (memcmp(s1->aux_sample.data, s2->aux_sample.data, 187 s1->aux_sample.size)) { 188 pr_debug("Samples differ at 'aux_sample'\n"); 189 return false; 190 } 191 } 192 193 return true; 194 } 195 196 static int do_test(u64 sample_type, u64 sample_regs, u64 read_format) 197 { 198 struct evsel evsel = { 199 .needs_swap = false, 200 .core = { 201 . attr = { 202 .sample_type = sample_type, 203 .read_format = read_format, 204 }, 205 }, 206 }; 207 union perf_event *event; 208 union { 209 struct ip_callchain callchain; 210 u64 data[64]; 211 } callchain = { 212 /* 3 ips */ 213 .data = {3, 201, 202, 203}, 214 }; 215 union { 216 struct branch_stack branch_stack; 217 u64 data[64]; 218 } branch_stack = { 219 /* 1 branch_entry */ 220 .data = {1, -1ULL, 211, 212, 213}, 221 }; 222 u64 regs[64]; 223 const u32 raw_data[] = {0x12345678, 0x0a0b0c0d, 0x11020304, 0x05060708, 0 }; 224 const u64 data[] = {0x2211443366558877ULL, 0, 0xaabbccddeeff4321ULL}; 225 const u64 aux_data[] = {0xa55a, 0, 0xeeddee, 0x0282028202820282}; 226 struct perf_sample sample = { 227 .ip = 101, 228 .pid = 102, 229 .tid = 103, 230 .time = 104, 231 .addr = 105, 232 .id = 106, 233 .stream_id = 107, 234 .period = 108, 235 .weight = 109, 236 .cpu = 110, 237 .raw_size = sizeof(raw_data), 238 .data_src = 111, 239 .transaction = 112, 240 .raw_data = (void *)raw_data, 241 .callchain = &callchain.callchain, 242 .no_hw_idx = false, 243 .branch_stack = &branch_stack.branch_stack, 244 .user_regs = { 245 .abi = PERF_SAMPLE_REGS_ABI_64, 246 .mask = sample_regs, 247 .regs = regs, 248 }, 249 .user_stack = { 250 .size = sizeof(data), 251 .data = (void *)data, 252 }, 253 .read = { 254 .time_enabled = 0x030a59d664fca7deULL, 255 .time_running = 0x011b6ae553eb98edULL, 256 }, 257 .intr_regs = { 258 .abi = PERF_SAMPLE_REGS_ABI_64, 259 .mask = sample_regs, 260 .regs = regs, 261 }, 262 .phys_addr = 113, 263 .cgroup = 114, 264 .data_page_size = 115, 265 .code_page_size = 116, 266 .aux_sample = { 267 .size = sizeof(aux_data), 268 .data = (void *)aux_data, 269 }, 270 }; 271 struct sample_read_value values[] = {{1, 5, 0}, {9, 3, 0}, {2, 7, 0}, {6, 4, 1},}; 272 struct perf_sample sample_out, sample_out_endian; 273 size_t i, sz, bufsz; 274 int err, ret = -1; 275 276 if (sample_type & PERF_SAMPLE_REGS_USER) 277 evsel.core.attr.sample_regs_user = sample_regs; 278 279 if (sample_type & PERF_SAMPLE_REGS_INTR) 280 evsel.core.attr.sample_regs_intr = sample_regs; 281 282 if (sample_type & PERF_SAMPLE_BRANCH_STACK) 283 evsel.core.attr.branch_sample_type |= PERF_SAMPLE_BRANCH_HW_INDEX; 284 285 for (i = 0; i < sizeof(regs); i++) 286 *(i + (u8 *)regs) = i & 0xfe; 287 288 if (read_format & PERF_FORMAT_GROUP) { 289 sample.read.group.nr = 4; 290 sample.read.group.values = values; 291 } else { 292 sample.read.one.value = 0x08789faeb786aa87ULL; 293 sample.read.one.id = 99; 294 sample.read.one.lost = 1; 295 } 296 297 sz = perf_event__sample_event_size(&sample, sample_type, read_format); 298 bufsz = sz + 4096; /* Add a bit for overrun checking */ 299 event = malloc(bufsz); 300 if (!event) { 301 pr_debug("malloc failed\n"); 302 return -1; 303 } 304 305 memset(event, 0xff, bufsz); 306 event->header.type = PERF_RECORD_SAMPLE; 307 event->header.misc = 0; 308 event->header.size = sz; 309 310 err = perf_event__synthesize_sample(event, sample_type, read_format, 311 &sample); 312 if (err) { 313 pr_debug("%s failed for sample_type %#"PRIx64", error %d\n", 314 "perf_event__synthesize_sample", sample_type, err); 315 goto out_free; 316 } 317 318 /* The data does not contain 0xff so we use that to check the size */ 319 for (i = bufsz; i > 0; i--) { 320 if (*(i - 1 + (u8 *)event) != 0xff) 321 break; 322 } 323 if (i != sz) { 324 pr_debug("Event size mismatch: actual %zu vs expected %zu\n", 325 i, sz); 326 goto out_free; 327 } 328 329 evsel.sample_size = __evsel__sample_size(sample_type); 330 331 err = evsel__parse_sample(&evsel, event, &sample_out); 332 if (err) { 333 pr_debug("%s failed for sample_type %#"PRIx64", error %d\n", 334 "evsel__parse_sample", sample_type, err); 335 goto out_free; 336 } 337 338 if (!samples_same(&sample, &sample_out, sample_type, read_format, evsel.needs_swap)) { 339 pr_debug("parsing failed for sample_type %#"PRIx64"\n", 340 sample_type); 341 goto out_free; 342 } 343 344 if (sample_type == PERF_SAMPLE_BRANCH_STACK) { 345 evsel.needs_swap = true; 346 evsel.sample_size = __evsel__sample_size(sample_type); 347 err = evsel__parse_sample(&evsel, event, &sample_out_endian); 348 if (err) { 349 pr_debug("%s failed for sample_type %#"PRIx64", error %d\n", 350 "evsel__parse_sample", sample_type, err); 351 goto out_free; 352 } 353 354 if (!samples_same(&sample, &sample_out_endian, sample_type, read_format, evsel.needs_swap)) { 355 pr_debug("parsing failed for sample_type %#"PRIx64"\n", 356 sample_type); 357 goto out_free; 358 } 359 } 360 361 ret = 0; 362 out_free: 363 free(event); 364 if (ret && read_format) 365 pr_debug("read_format %#"PRIx64"\n", read_format); 366 return ret; 367 } 368 369 /** 370 * test__sample_parsing - test sample parsing. 371 * 372 * This function implements a test that synthesizes a sample event, parses it 373 * and then checks that the parsed sample matches the original sample. The test 374 * checks sample format bits separately and together. If the test passes %0 is 375 * returned, otherwise %-1 is returned. 376 */ 377 static int test__sample_parsing(struct test_suite *test __maybe_unused, int subtest __maybe_unused) 378 { 379 const u64 rf[] = {4, 5, 6, 7, 12, 13, 14, 15, 20, 21, 22, 28, 29, 30, 31}; 380 u64 sample_type; 381 u64 sample_regs; 382 size_t i; 383 int err; 384 385 /* 386 * Fail the test if it has not been updated when new sample format bits 387 * were added. Please actually update the test rather than just change 388 * the condition below. 389 */ 390 if (PERF_SAMPLE_MAX > PERF_SAMPLE_WEIGHT_STRUCT << 1) { 391 pr_debug("sample format has changed, some new PERF_SAMPLE_ bit was introduced - test needs updating\n"); 392 return -1; 393 } 394 395 /* Test each sample format bit separately */ 396 for (sample_type = 1; sample_type != PERF_SAMPLE_MAX; 397 sample_type <<= 1) { 398 /* Test read_format variations */ 399 if (sample_type == PERF_SAMPLE_READ) { 400 for (i = 0; i < ARRAY_SIZE(rf); i++) { 401 err = do_test(sample_type, 0, rf[i]); 402 if (err) 403 return err; 404 } 405 continue; 406 } 407 sample_regs = 0; 408 409 if (sample_type == PERF_SAMPLE_REGS_USER) 410 sample_regs = 0x3fff; 411 412 if (sample_type == PERF_SAMPLE_REGS_INTR) 413 sample_regs = 0xff0fff; 414 415 err = do_test(sample_type, sample_regs, 0); 416 if (err) 417 return err; 418 } 419 420 /* 421 * Test all sample format bits together 422 * Note: PERF_SAMPLE_WEIGHT and PERF_SAMPLE_WEIGHT_STRUCT cannot 423 * be set simultaneously. 424 */ 425 sample_type = (PERF_SAMPLE_MAX - 1) & ~PERF_SAMPLE_WEIGHT; 426 sample_regs = 0x3fff; /* shared yb intr and user regs */ 427 for (i = 0; i < ARRAY_SIZE(rf); i++) { 428 err = do_test(sample_type, sample_regs, rf[i]); 429 if (err) 430 return err; 431 } 432 433 return 0; 434 } 435 436 DEFINE_SUITE("Sample parsing", sample_parsing); 437