Stephane Eranian | 9b07e27 | 2015-11-30 10:02:21 +0100 | [diff] [blame] | 1 | #include <sys/types.h> |
| 2 | #include <stdio.h> |
| 3 | #include <stdlib.h> |
| 4 | #include <string.h> |
| 5 | #include <fcntl.h> |
| 6 | #include <unistd.h> |
| 7 | #include <inttypes.h> |
| 8 | #include <byteswap.h> |
| 9 | #include <sys/stat.h> |
| 10 | #include <sys/mman.h> |
| 11 | |
| 12 | #include "util.h" |
| 13 | #include "event.h" |
| 14 | #include "debug.h" |
| 15 | #include "evlist.h" |
| 16 | #include "symbol.h" |
| 17 | #include "strlist.h" |
| 18 | #include <elf.h> |
| 19 | |
Adrian Hunter | 2a28e23 | 2016-03-08 10:38:50 +0200 | [diff] [blame] | 20 | #include "tsc.h" |
Stephane Eranian | 9b07e27 | 2015-11-30 10:02:21 +0100 | [diff] [blame] | 21 | #include "session.h" |
| 22 | #include "jit.h" |
| 23 | #include "jitdump.h" |
| 24 | #include "genelf.h" |
| 25 | #include "../builtin.h" |
| 26 | |
| 27 | struct jit_buf_desc { |
| 28 | struct perf_data_file *output; |
| 29 | struct perf_session *session; |
| 30 | struct machine *machine; |
| 31 | union jr_entry *entry; |
| 32 | void *buf; |
| 33 | uint64_t sample_type; |
| 34 | size_t bufsize; |
| 35 | FILE *in; |
| 36 | bool needs_bswap; /* handles cross-endianess */ |
Adrian Hunter | 2a28e23 | 2016-03-08 10:38:50 +0200 | [diff] [blame] | 37 | bool use_arch_timestamp; |
Stephane Eranian | 9b07e27 | 2015-11-30 10:02:21 +0100 | [diff] [blame] | 38 | void *debug_data; |
| 39 | size_t nr_debug_entries; |
| 40 | uint32_t code_load_count; |
| 41 | u64 bytes_written; |
| 42 | struct rb_root code_root; |
| 43 | char dir[PATH_MAX]; |
| 44 | }; |
| 45 | |
| 46 | struct debug_line_info { |
| 47 | unsigned long vma; |
| 48 | unsigned int lineno; |
| 49 | /* The filename format is unspecified, absolute path, relative etc. */ |
| 50 | char const filename[0]; |
| 51 | }; |
| 52 | |
| 53 | struct jit_tool { |
| 54 | struct perf_tool tool; |
| 55 | struct perf_data_file output; |
| 56 | struct perf_data_file input; |
| 57 | u64 bytes_written; |
| 58 | }; |
| 59 | |
| 60 | #define hmax(a, b) ((a) > (b) ? (a) : (b)) |
| 61 | #define get_jit_tool(t) (container_of(tool, struct jit_tool, tool)) |
| 62 | |
| 63 | static int |
| 64 | jit_emit_elf(char *filename, |
| 65 | const char *sym, |
| 66 | uint64_t code_addr, |
| 67 | const void *code, |
Stephane Eranian | 598b7c6 | 2015-11-30 10:02:23 +0100 | [diff] [blame] | 68 | int csize, |
| 69 | void *debug, |
| 70 | int nr_debug_entries) |
Stephane Eranian | 9b07e27 | 2015-11-30 10:02:21 +0100 | [diff] [blame] | 71 | { |
| 72 | int ret, fd; |
| 73 | |
| 74 | if (verbose > 0) |
| 75 | fprintf(stderr, "write ELF image %s\n", filename); |
| 76 | |
| 77 | fd = open(filename, O_CREAT|O_TRUNC|O_WRONLY, 0644); |
| 78 | if (fd == -1) { |
| 79 | pr_warning("cannot create jit ELF %s: %s\n", filename, strerror(errno)); |
| 80 | return -1; |
| 81 | } |
| 82 | |
Stephane Eranian | 598b7c6 | 2015-11-30 10:02:23 +0100 | [diff] [blame] | 83 | ret = jit_write_elf(fd, code_addr, sym, (const void *)code, csize, debug, nr_debug_entries); |
Stephane Eranian | 9b07e27 | 2015-11-30 10:02:21 +0100 | [diff] [blame] | 84 | |
| 85 | close(fd); |
| 86 | |
| 87 | if (ret) |
| 88 | unlink(filename); |
| 89 | |
| 90 | return ret; |
| 91 | } |
| 92 | |
| 93 | static void |
| 94 | jit_close(struct jit_buf_desc *jd) |
| 95 | { |
| 96 | if (!(jd && jd->in)) |
| 97 | return; |
| 98 | funlockfile(jd->in); |
| 99 | fclose(jd->in); |
| 100 | jd->in = NULL; |
| 101 | } |
| 102 | |
| 103 | static int |
Adrian Hunter | 4a018cc | 2016-03-07 16:44:41 -0300 | [diff] [blame] | 104 | jit_validate_events(struct perf_session *session) |
| 105 | { |
| 106 | struct perf_evsel *evsel; |
| 107 | |
| 108 | /* |
| 109 | * check that all events use CLOCK_MONOTONIC |
| 110 | */ |
Arnaldo Carvalho de Melo | e5cadb9 | 2016-06-23 11:26:15 -0300 | [diff] [blame^] | 111 | evlist__for_each_entry(session->evlist, evsel) { |
Adrian Hunter | 4a018cc | 2016-03-07 16:44:41 -0300 | [diff] [blame] | 112 | if (evsel->attr.use_clockid == 0 || evsel->attr.clockid != CLOCK_MONOTONIC) |
| 113 | return -1; |
| 114 | } |
| 115 | return 0; |
| 116 | } |
| 117 | |
| 118 | static int |
Stephane Eranian | 9b07e27 | 2015-11-30 10:02:21 +0100 | [diff] [blame] | 119 | jit_open(struct jit_buf_desc *jd, const char *name) |
| 120 | { |
| 121 | struct jitheader header; |
| 122 | struct jr_prefix *prefix; |
| 123 | ssize_t bs, bsz = 0; |
| 124 | void *n, *buf = NULL; |
| 125 | int ret, retval = -1; |
| 126 | |
| 127 | jd->in = fopen(name, "r"); |
| 128 | if (!jd->in) |
| 129 | return -1; |
| 130 | |
| 131 | bsz = hmax(sizeof(header), sizeof(*prefix)); |
| 132 | |
| 133 | buf = malloc(bsz); |
| 134 | if (!buf) |
| 135 | goto error; |
| 136 | |
| 137 | /* |
| 138 | * protect from writer modifying the file while we are reading it |
| 139 | */ |
| 140 | flockfile(jd->in); |
| 141 | |
| 142 | ret = fread(buf, sizeof(header), 1, jd->in); |
| 143 | if (ret != 1) |
| 144 | goto error; |
| 145 | |
| 146 | memcpy(&header, buf, sizeof(header)); |
| 147 | |
| 148 | if (header.magic != JITHEADER_MAGIC) { |
| 149 | if (header.magic != JITHEADER_MAGIC_SW) |
| 150 | goto error; |
| 151 | jd->needs_bswap = true; |
| 152 | } |
| 153 | |
| 154 | if (jd->needs_bswap) { |
| 155 | header.version = bswap_32(header.version); |
| 156 | header.total_size = bswap_32(header.total_size); |
| 157 | header.pid = bswap_32(header.pid); |
| 158 | header.elf_mach = bswap_32(header.elf_mach); |
| 159 | header.timestamp = bswap_64(header.timestamp); |
| 160 | header.flags = bswap_64(header.flags); |
| 161 | } |
| 162 | |
Adrian Hunter | 2a28e23 | 2016-03-08 10:38:50 +0200 | [diff] [blame] | 163 | jd->use_arch_timestamp = header.flags & JITDUMP_FLAGS_ARCH_TIMESTAMP; |
| 164 | |
Stephane Eranian | 9b07e27 | 2015-11-30 10:02:21 +0100 | [diff] [blame] | 165 | if (verbose > 2) |
Adrian Hunter | 2a28e23 | 2016-03-08 10:38:50 +0200 | [diff] [blame] | 166 | pr_debug("version=%u\nhdr.size=%u\nts=0x%llx\npid=%d\nelf_mach=%d\nuse_arch_timestamp=%d\n", |
Stephane Eranian | 9b07e27 | 2015-11-30 10:02:21 +0100 | [diff] [blame] | 167 | header.version, |
| 168 | header.total_size, |
| 169 | (unsigned long long)header.timestamp, |
| 170 | header.pid, |
Adrian Hunter | 2a28e23 | 2016-03-08 10:38:50 +0200 | [diff] [blame] | 171 | header.elf_mach, |
| 172 | jd->use_arch_timestamp); |
Stephane Eranian | 9b07e27 | 2015-11-30 10:02:21 +0100 | [diff] [blame] | 173 | |
| 174 | if (header.flags & JITDUMP_FLAGS_RESERVED) { |
| 175 | pr_err("jitdump file contains invalid or unsupported flags 0x%llx\n", |
| 176 | (unsigned long long)header.flags & JITDUMP_FLAGS_RESERVED); |
| 177 | goto error; |
| 178 | } |
| 179 | |
Adrian Hunter | 2a28e23 | 2016-03-08 10:38:50 +0200 | [diff] [blame] | 180 | if (jd->use_arch_timestamp && !jd->session->time_conv.time_mult) { |
| 181 | pr_err("jitdump file uses arch timestamps but there is no timestamp conversion\n"); |
| 182 | goto error; |
| 183 | } |
| 184 | |
Adrian Hunter | 4a018cc | 2016-03-07 16:44:41 -0300 | [diff] [blame] | 185 | /* |
| 186 | * validate event is using the correct clockid |
| 187 | */ |
Adrian Hunter | 2a28e23 | 2016-03-08 10:38:50 +0200 | [diff] [blame] | 188 | if (!jd->use_arch_timestamp && jit_validate_events(jd->session)) { |
Adrian Hunter | 4a018cc | 2016-03-07 16:44:41 -0300 | [diff] [blame] | 189 | pr_err("error, jitted code must be sampled with perf record -k 1\n"); |
| 190 | goto error; |
| 191 | } |
| 192 | |
Stephane Eranian | 9b07e27 | 2015-11-30 10:02:21 +0100 | [diff] [blame] | 193 | bs = header.total_size - sizeof(header); |
| 194 | |
| 195 | if (bs > bsz) { |
| 196 | n = realloc(buf, bs); |
| 197 | if (!n) |
| 198 | goto error; |
| 199 | bsz = bs; |
| 200 | buf = n; |
| 201 | /* read extra we do not know about */ |
| 202 | ret = fread(buf, bs - bsz, 1, jd->in); |
| 203 | if (ret != 1) |
| 204 | goto error; |
| 205 | } |
| 206 | /* |
| 207 | * keep dirname for generating files and mmap records |
| 208 | */ |
| 209 | strcpy(jd->dir, name); |
| 210 | dirname(jd->dir); |
| 211 | |
| 212 | return 0; |
| 213 | error: |
| 214 | funlockfile(jd->in); |
| 215 | fclose(jd->in); |
| 216 | return retval; |
| 217 | } |
| 218 | |
| 219 | static union jr_entry * |
| 220 | jit_get_next_entry(struct jit_buf_desc *jd) |
| 221 | { |
| 222 | struct jr_prefix *prefix; |
| 223 | union jr_entry *jr; |
| 224 | void *addr; |
| 225 | size_t bs, size; |
| 226 | int id, ret; |
| 227 | |
| 228 | if (!(jd && jd->in)) |
| 229 | return NULL; |
| 230 | |
| 231 | if (jd->buf == NULL) { |
| 232 | size_t sz = getpagesize(); |
| 233 | if (sz < sizeof(*prefix)) |
| 234 | sz = sizeof(*prefix); |
| 235 | |
| 236 | jd->buf = malloc(sz); |
| 237 | if (jd->buf == NULL) |
| 238 | return NULL; |
| 239 | |
| 240 | jd->bufsize = sz; |
| 241 | } |
| 242 | |
| 243 | prefix = jd->buf; |
| 244 | |
| 245 | /* |
| 246 | * file is still locked at this point |
| 247 | */ |
| 248 | ret = fread(prefix, sizeof(*prefix), 1, jd->in); |
| 249 | if (ret != 1) |
| 250 | return NULL; |
| 251 | |
| 252 | if (jd->needs_bswap) { |
| 253 | prefix->id = bswap_32(prefix->id); |
| 254 | prefix->total_size = bswap_32(prefix->total_size); |
| 255 | prefix->timestamp = bswap_64(prefix->timestamp); |
| 256 | } |
| 257 | id = prefix->id; |
| 258 | size = prefix->total_size; |
| 259 | |
| 260 | bs = (size_t)size; |
| 261 | if (bs < sizeof(*prefix)) |
| 262 | return NULL; |
| 263 | |
| 264 | if (id >= JIT_CODE_MAX) { |
| 265 | pr_warning("next_entry: unknown prefix %d, skipping\n", id); |
| 266 | return NULL; |
| 267 | } |
| 268 | if (bs > jd->bufsize) { |
| 269 | void *n; |
| 270 | n = realloc(jd->buf, bs); |
| 271 | if (!n) |
| 272 | return NULL; |
| 273 | jd->buf = n; |
| 274 | jd->bufsize = bs; |
| 275 | } |
| 276 | |
| 277 | addr = ((void *)jd->buf) + sizeof(*prefix); |
| 278 | |
| 279 | ret = fread(addr, bs - sizeof(*prefix), 1, jd->in); |
| 280 | if (ret != 1) |
| 281 | return NULL; |
| 282 | |
| 283 | jr = (union jr_entry *)jd->buf; |
| 284 | |
| 285 | switch(id) { |
| 286 | case JIT_CODE_DEBUG_INFO: |
| 287 | if (jd->needs_bswap) { |
| 288 | uint64_t n; |
| 289 | jr->info.code_addr = bswap_64(jr->info.code_addr); |
| 290 | jr->info.nr_entry = bswap_64(jr->info.nr_entry); |
| 291 | for (n = 0 ; n < jr->info.nr_entry; n++) { |
| 292 | jr->info.entries[n].addr = bswap_64(jr->info.entries[n].addr); |
| 293 | jr->info.entries[n].lineno = bswap_32(jr->info.entries[n].lineno); |
| 294 | jr->info.entries[n].discrim = bswap_32(jr->info.entries[n].discrim); |
| 295 | } |
| 296 | } |
| 297 | break; |
| 298 | case JIT_CODE_CLOSE: |
| 299 | break; |
| 300 | case JIT_CODE_LOAD: |
| 301 | if (jd->needs_bswap) { |
| 302 | jr->load.pid = bswap_32(jr->load.pid); |
| 303 | jr->load.tid = bswap_32(jr->load.tid); |
| 304 | jr->load.vma = bswap_64(jr->load.vma); |
| 305 | jr->load.code_addr = bswap_64(jr->load.code_addr); |
| 306 | jr->load.code_size = bswap_64(jr->load.code_size); |
| 307 | jr->load.code_index= bswap_64(jr->load.code_index); |
| 308 | } |
| 309 | jd->code_load_count++; |
| 310 | break; |
| 311 | case JIT_CODE_MOVE: |
| 312 | if (jd->needs_bswap) { |
| 313 | jr->move.pid = bswap_32(jr->move.pid); |
| 314 | jr->move.tid = bswap_32(jr->move.tid); |
| 315 | jr->move.vma = bswap_64(jr->move.vma); |
| 316 | jr->move.old_code_addr = bswap_64(jr->move.old_code_addr); |
| 317 | jr->move.new_code_addr = bswap_64(jr->move.new_code_addr); |
| 318 | jr->move.code_size = bswap_64(jr->move.code_size); |
| 319 | jr->move.code_index = bswap_64(jr->move.code_index); |
| 320 | } |
| 321 | break; |
| 322 | case JIT_CODE_MAX: |
| 323 | default: |
| 324 | return NULL; |
| 325 | } |
| 326 | return jr; |
| 327 | } |
| 328 | |
| 329 | static int |
| 330 | jit_inject_event(struct jit_buf_desc *jd, union perf_event *event) |
| 331 | { |
| 332 | ssize_t size; |
| 333 | |
| 334 | size = perf_data_file__write(jd->output, event, event->header.size); |
| 335 | if (size < 0) |
| 336 | return -1; |
| 337 | |
| 338 | jd->bytes_written += size; |
| 339 | return 0; |
| 340 | } |
| 341 | |
Adrian Hunter | 2a28e23 | 2016-03-08 10:38:50 +0200 | [diff] [blame] | 342 | static uint64_t convert_timestamp(struct jit_buf_desc *jd, uint64_t timestamp) |
| 343 | { |
| 344 | struct perf_tsc_conversion tc; |
| 345 | |
| 346 | if (!jd->use_arch_timestamp) |
| 347 | return timestamp; |
| 348 | |
| 349 | tc.time_shift = jd->session->time_conv.time_shift; |
| 350 | tc.time_mult = jd->session->time_conv.time_mult; |
| 351 | tc.time_zero = jd->session->time_conv.time_zero; |
| 352 | |
| 353 | if (!tc.time_mult) |
| 354 | return 0; |
| 355 | |
| 356 | return tsc_to_perf_time(timestamp, &tc); |
| 357 | } |
| 358 | |
Stephane Eranian | 9b07e27 | 2015-11-30 10:02:21 +0100 | [diff] [blame] | 359 | static int jit_repipe_code_load(struct jit_buf_desc *jd, union jr_entry *jr) |
| 360 | { |
| 361 | struct perf_sample sample; |
| 362 | union perf_event *event; |
| 363 | struct perf_tool *tool = jd->session->tool; |
| 364 | uint64_t code, addr; |
| 365 | uintptr_t uaddr; |
| 366 | char *filename; |
| 367 | struct stat st; |
| 368 | size_t size; |
| 369 | u16 idr_size; |
| 370 | const char *sym; |
| 371 | uint32_t count; |
| 372 | int ret, csize; |
| 373 | pid_t pid, tid; |
| 374 | struct { |
| 375 | u32 pid, tid; |
| 376 | u64 time; |
| 377 | } *id; |
| 378 | |
| 379 | pid = jr->load.pid; |
| 380 | tid = jr->load.tid; |
| 381 | csize = jr->load.code_size; |
| 382 | addr = jr->load.code_addr; |
| 383 | sym = (void *)((unsigned long)jr + sizeof(jr->load)); |
| 384 | code = (unsigned long)jr + jr->load.p.total_size - csize; |
| 385 | count = jr->load.code_index; |
| 386 | idr_size = jd->machine->id_hdr_size; |
| 387 | |
| 388 | event = calloc(1, sizeof(*event) + idr_size); |
| 389 | if (!event) |
| 390 | return -1; |
| 391 | |
| 392 | filename = event->mmap2.filename; |
| 393 | size = snprintf(filename, PATH_MAX, "%s/jitted-%d-%u.so", |
| 394 | jd->dir, |
| 395 | pid, |
| 396 | count); |
| 397 | |
| 398 | size++; /* for \0 */ |
| 399 | |
| 400 | size = PERF_ALIGN(size, sizeof(u64)); |
| 401 | uaddr = (uintptr_t)code; |
Stephane Eranian | 598b7c6 | 2015-11-30 10:02:23 +0100 | [diff] [blame] | 402 | ret = jit_emit_elf(filename, sym, addr, (const void *)uaddr, csize, jd->debug_data, jd->nr_debug_entries); |
Stephane Eranian | 9b07e27 | 2015-11-30 10:02:21 +0100 | [diff] [blame] | 403 | |
| 404 | if (jd->debug_data && jd->nr_debug_entries) { |
| 405 | free(jd->debug_data); |
| 406 | jd->debug_data = NULL; |
| 407 | jd->nr_debug_entries = 0; |
| 408 | } |
| 409 | |
| 410 | if (ret) { |
| 411 | free(event); |
| 412 | return -1; |
| 413 | } |
| 414 | if (stat(filename, &st)) |
Colin Ian King | f56ebf2 | 2016-04-19 00:07:18 +0100 | [diff] [blame] | 415 | memset(&st, 0, sizeof(st)); |
Stephane Eranian | 9b07e27 | 2015-11-30 10:02:21 +0100 | [diff] [blame] | 416 | |
| 417 | event->mmap2.header.type = PERF_RECORD_MMAP2; |
| 418 | event->mmap2.header.misc = PERF_RECORD_MISC_USER; |
| 419 | event->mmap2.header.size = (sizeof(event->mmap2) - |
| 420 | (sizeof(event->mmap2.filename) - size) + idr_size); |
| 421 | |
| 422 | event->mmap2.pgoff = GEN_ELF_TEXT_OFFSET; |
| 423 | event->mmap2.start = addr; |
| 424 | event->mmap2.len = csize; |
| 425 | event->mmap2.pid = pid; |
| 426 | event->mmap2.tid = tid; |
| 427 | event->mmap2.ino = st.st_ino; |
| 428 | event->mmap2.maj = major(st.st_dev); |
| 429 | event->mmap2.min = minor(st.st_dev); |
| 430 | event->mmap2.prot = st.st_mode; |
| 431 | event->mmap2.flags = MAP_SHARED; |
| 432 | event->mmap2.ino_generation = 1; |
| 433 | |
| 434 | id = (void *)((unsigned long)event + event->mmap.header.size - idr_size); |
| 435 | if (jd->sample_type & PERF_SAMPLE_TID) { |
| 436 | id->pid = pid; |
| 437 | id->tid = tid; |
| 438 | } |
| 439 | if (jd->sample_type & PERF_SAMPLE_TIME) |
Adrian Hunter | 2a28e23 | 2016-03-08 10:38:50 +0200 | [diff] [blame] | 440 | id->time = convert_timestamp(jd, jr->load.p.timestamp); |
Stephane Eranian | 9b07e27 | 2015-11-30 10:02:21 +0100 | [diff] [blame] | 441 | |
| 442 | /* |
| 443 | * create pseudo sample to induce dso hit increment |
| 444 | * use first address as sample address |
| 445 | */ |
| 446 | memset(&sample, 0, sizeof(sample)); |
Arnaldo Carvalho de Melo | 3ea223a | 2016-03-29 18:46:04 -0300 | [diff] [blame] | 447 | sample.cpumode = PERF_RECORD_MISC_USER; |
Stephane Eranian | 9b07e27 | 2015-11-30 10:02:21 +0100 | [diff] [blame] | 448 | sample.pid = pid; |
| 449 | sample.tid = tid; |
| 450 | sample.time = id->time; |
| 451 | sample.ip = addr; |
| 452 | |
| 453 | ret = perf_event__process_mmap2(tool, event, &sample, jd->machine); |
| 454 | if (ret) |
| 455 | return ret; |
| 456 | |
| 457 | ret = jit_inject_event(jd, event); |
| 458 | /* |
| 459 | * mark dso as use to generate buildid in the header |
| 460 | */ |
| 461 | if (!ret) |
| 462 | build_id__mark_dso_hit(tool, event, &sample, NULL, jd->machine); |
| 463 | |
| 464 | return ret; |
| 465 | } |
| 466 | |
| 467 | static int jit_repipe_code_move(struct jit_buf_desc *jd, union jr_entry *jr) |
| 468 | { |
| 469 | struct perf_sample sample; |
| 470 | union perf_event *event; |
| 471 | struct perf_tool *tool = jd->session->tool; |
| 472 | char *filename; |
| 473 | size_t size; |
| 474 | struct stat st; |
| 475 | u16 idr_size; |
| 476 | int ret; |
| 477 | pid_t pid, tid; |
| 478 | struct { |
| 479 | u32 pid, tid; |
| 480 | u64 time; |
| 481 | } *id; |
| 482 | |
| 483 | pid = jr->move.pid; |
| 484 | tid = jr->move.tid; |
| 485 | idr_size = jd->machine->id_hdr_size; |
| 486 | |
| 487 | /* |
| 488 | * +16 to account for sample_id_all (hack) |
| 489 | */ |
| 490 | event = calloc(1, sizeof(*event) + 16); |
| 491 | if (!event) |
| 492 | return -1; |
| 493 | |
| 494 | filename = event->mmap2.filename; |
| 495 | size = snprintf(filename, PATH_MAX, "%s/jitted-%d-%"PRIu64, |
| 496 | jd->dir, |
| 497 | pid, |
| 498 | jr->move.code_index); |
| 499 | |
| 500 | size++; /* for \0 */ |
| 501 | |
| 502 | if (stat(filename, &st)) |
Colin Ian King | f56ebf2 | 2016-04-19 00:07:18 +0100 | [diff] [blame] | 503 | memset(&st, 0, sizeof(st)); |
Stephane Eranian | 9b07e27 | 2015-11-30 10:02:21 +0100 | [diff] [blame] | 504 | |
| 505 | size = PERF_ALIGN(size, sizeof(u64)); |
| 506 | |
| 507 | event->mmap2.header.type = PERF_RECORD_MMAP2; |
| 508 | event->mmap2.header.misc = PERF_RECORD_MISC_USER; |
| 509 | event->mmap2.header.size = (sizeof(event->mmap2) - |
| 510 | (sizeof(event->mmap2.filename) - size) + idr_size); |
| 511 | event->mmap2.pgoff = GEN_ELF_TEXT_OFFSET; |
| 512 | event->mmap2.start = jr->move.new_code_addr; |
| 513 | event->mmap2.len = jr->move.code_size; |
| 514 | event->mmap2.pid = pid; |
| 515 | event->mmap2.tid = tid; |
| 516 | event->mmap2.ino = st.st_ino; |
| 517 | event->mmap2.maj = major(st.st_dev); |
| 518 | event->mmap2.min = minor(st.st_dev); |
| 519 | event->mmap2.prot = st.st_mode; |
| 520 | event->mmap2.flags = MAP_SHARED; |
| 521 | event->mmap2.ino_generation = 1; |
| 522 | |
| 523 | id = (void *)((unsigned long)event + event->mmap.header.size - idr_size); |
| 524 | if (jd->sample_type & PERF_SAMPLE_TID) { |
| 525 | id->pid = pid; |
| 526 | id->tid = tid; |
| 527 | } |
| 528 | if (jd->sample_type & PERF_SAMPLE_TIME) |
Adrian Hunter | 2a28e23 | 2016-03-08 10:38:50 +0200 | [diff] [blame] | 529 | id->time = convert_timestamp(jd, jr->load.p.timestamp); |
Stephane Eranian | 9b07e27 | 2015-11-30 10:02:21 +0100 | [diff] [blame] | 530 | |
| 531 | /* |
| 532 | * create pseudo sample to induce dso hit increment |
| 533 | * use first address as sample address |
| 534 | */ |
| 535 | memset(&sample, 0, sizeof(sample)); |
Arnaldo Carvalho de Melo | 3ea223a | 2016-03-29 18:46:04 -0300 | [diff] [blame] | 536 | sample.cpumode = PERF_RECORD_MISC_USER; |
Stephane Eranian | 9b07e27 | 2015-11-30 10:02:21 +0100 | [diff] [blame] | 537 | sample.pid = pid; |
| 538 | sample.tid = tid; |
| 539 | sample.time = id->time; |
| 540 | sample.ip = jr->move.new_code_addr; |
| 541 | |
| 542 | ret = perf_event__process_mmap2(tool, event, &sample, jd->machine); |
| 543 | if (ret) |
| 544 | return ret; |
| 545 | |
| 546 | ret = jit_inject_event(jd, event); |
| 547 | if (!ret) |
| 548 | build_id__mark_dso_hit(tool, event, &sample, NULL, jd->machine); |
| 549 | |
| 550 | return ret; |
| 551 | } |
| 552 | |
| 553 | static int jit_repipe_debug_info(struct jit_buf_desc *jd, union jr_entry *jr) |
| 554 | { |
| 555 | void *data; |
| 556 | size_t sz; |
| 557 | |
| 558 | if (!(jd && jr)) |
| 559 | return -1; |
| 560 | |
| 561 | sz = jr->prefix.total_size - sizeof(jr->info); |
| 562 | data = malloc(sz); |
| 563 | if (!data) |
| 564 | return -1; |
| 565 | |
| 566 | memcpy(data, &jr->info.entries, sz); |
| 567 | |
| 568 | jd->debug_data = data; |
| 569 | |
| 570 | /* |
| 571 | * we must use nr_entry instead of size here because |
| 572 | * we cannot distinguish actual entry from padding otherwise |
| 573 | */ |
| 574 | jd->nr_debug_entries = jr->info.nr_entry; |
| 575 | |
| 576 | return 0; |
| 577 | } |
| 578 | |
| 579 | static int |
| 580 | jit_process_dump(struct jit_buf_desc *jd) |
| 581 | { |
| 582 | union jr_entry *jr; |
| 583 | int ret; |
| 584 | |
| 585 | while ((jr = jit_get_next_entry(jd))) { |
| 586 | switch(jr->prefix.id) { |
| 587 | case JIT_CODE_LOAD: |
| 588 | ret = jit_repipe_code_load(jd, jr); |
| 589 | break; |
| 590 | case JIT_CODE_MOVE: |
| 591 | ret = jit_repipe_code_move(jd, jr); |
| 592 | break; |
| 593 | case JIT_CODE_DEBUG_INFO: |
| 594 | ret = jit_repipe_debug_info(jd, jr); |
| 595 | break; |
| 596 | default: |
| 597 | ret = 0; |
| 598 | continue; |
| 599 | } |
| 600 | } |
| 601 | return ret; |
| 602 | } |
| 603 | |
| 604 | static int |
| 605 | jit_inject(struct jit_buf_desc *jd, char *path) |
| 606 | { |
| 607 | int ret; |
| 608 | |
| 609 | if (verbose > 0) |
| 610 | fprintf(stderr, "injecting: %s\n", path); |
| 611 | |
| 612 | ret = jit_open(jd, path); |
| 613 | if (ret) |
| 614 | return -1; |
| 615 | |
| 616 | ret = jit_process_dump(jd); |
| 617 | |
| 618 | jit_close(jd); |
| 619 | |
| 620 | if (verbose > 0) |
| 621 | fprintf(stderr, "injected: %s (%d)\n", path, ret); |
| 622 | |
| 623 | return 0; |
| 624 | } |
| 625 | |
| 626 | /* |
| 627 | * File must be with pattern .../jit-XXXX.dump |
| 628 | * where XXXX is the PID of the process which did the mmap() |
| 629 | * as captured in the RECORD_MMAP record |
| 630 | */ |
| 631 | static int |
| 632 | jit_detect(char *mmap_name, pid_t pid) |
| 633 | { |
| 634 | char *p; |
| 635 | char *end = NULL; |
| 636 | pid_t pid2; |
| 637 | |
| 638 | if (verbose > 2) |
| 639 | fprintf(stderr, "jit marker trying : %s\n", mmap_name); |
| 640 | /* |
| 641 | * get file name |
| 642 | */ |
| 643 | p = strrchr(mmap_name, '/'); |
| 644 | if (!p) |
| 645 | return -1; |
| 646 | |
| 647 | /* |
| 648 | * match prefix |
| 649 | */ |
| 650 | if (strncmp(p, "/jit-", 5)) |
| 651 | return -1; |
| 652 | |
| 653 | /* |
| 654 | * skip prefix |
| 655 | */ |
| 656 | p += 5; |
| 657 | |
| 658 | /* |
| 659 | * must be followed by a pid |
| 660 | */ |
| 661 | if (!isdigit(*p)) |
| 662 | return -1; |
| 663 | |
| 664 | pid2 = (int)strtol(p, &end, 10); |
| 665 | if (!end) |
| 666 | return -1; |
| 667 | |
| 668 | /* |
| 669 | * pid does not match mmap pid |
| 670 | * pid==0 in system-wide mode (synthesized) |
| 671 | */ |
| 672 | if (pid && pid2 != pid) |
| 673 | return -1; |
| 674 | /* |
| 675 | * validate suffix |
| 676 | */ |
| 677 | if (strcmp(end, ".dump")) |
| 678 | return -1; |
| 679 | |
| 680 | if (verbose > 0) |
| 681 | fprintf(stderr, "jit marker found: %s\n", mmap_name); |
| 682 | |
| 683 | return 0; |
| 684 | } |
| 685 | |
| 686 | int |
| 687 | jit_process(struct perf_session *session, |
| 688 | struct perf_data_file *output, |
| 689 | struct machine *machine, |
| 690 | char *filename, |
| 691 | pid_t pid, |
| 692 | u64 *nbytes) |
| 693 | { |
| 694 | struct perf_evsel *first; |
| 695 | struct jit_buf_desc jd; |
| 696 | int ret; |
| 697 | |
| 698 | /* |
| 699 | * first, detect marker mmap (i.e., the jitdump mmap) |
| 700 | */ |
| 701 | if (jit_detect(filename, pid)) |
Adrian Hunter | 570735b | 2016-03-07 16:44:40 -0300 | [diff] [blame] | 702 | return 0; |
Stephane Eranian | 9b07e27 | 2015-11-30 10:02:21 +0100 | [diff] [blame] | 703 | |
| 704 | memset(&jd, 0, sizeof(jd)); |
| 705 | |
| 706 | jd.session = session; |
| 707 | jd.output = output; |
| 708 | jd.machine = machine; |
| 709 | |
| 710 | /* |
| 711 | * track sample_type to compute id_all layout |
| 712 | * perf sets the same sample type to all events as of now |
| 713 | */ |
| 714 | first = perf_evlist__first(session->evlist); |
| 715 | jd.sample_type = first->attr.sample_type; |
| 716 | |
| 717 | *nbytes = 0; |
| 718 | |
| 719 | ret = jit_inject(&jd, filename); |
Adrian Hunter | 570735b | 2016-03-07 16:44:40 -0300 | [diff] [blame] | 720 | if (!ret) { |
Stephane Eranian | 9b07e27 | 2015-11-30 10:02:21 +0100 | [diff] [blame] | 721 | *nbytes = jd.bytes_written; |
Adrian Hunter | 570735b | 2016-03-07 16:44:40 -0300 | [diff] [blame] | 722 | ret = 1; |
| 723 | } |
Stephane Eranian | 9b07e27 | 2015-11-30 10:02:21 +0100 | [diff] [blame] | 724 | |
| 725 | return ret; |
| 726 | } |