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9b07e27f SE |
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 | ||
20 | #include "session.h" | |
21 | #include "jit.h" | |
22 | #include "jitdump.h" | |
23 | #include "genelf.h" | |
24 | #include "../builtin.h" | |
25 | ||
26 | struct jit_buf_desc { | |
27 | struct perf_data_file *output; | |
28 | struct perf_session *session; | |
29 | struct machine *machine; | |
30 | union jr_entry *entry; | |
31 | void *buf; | |
32 | uint64_t sample_type; | |
33 | size_t bufsize; | |
34 | FILE *in; | |
35 | bool needs_bswap; /* handles cross-endianess */ | |
36 | void *debug_data; | |
37 | size_t nr_debug_entries; | |
38 | uint32_t code_load_count; | |
39 | u64 bytes_written; | |
40 | struct rb_root code_root; | |
41 | char dir[PATH_MAX]; | |
42 | }; | |
43 | ||
44 | struct debug_line_info { | |
45 | unsigned long vma; | |
46 | unsigned int lineno; | |
47 | /* The filename format is unspecified, absolute path, relative etc. */ | |
48 | char const filename[0]; | |
49 | }; | |
50 | ||
51 | struct jit_tool { | |
52 | struct perf_tool tool; | |
53 | struct perf_data_file output; | |
54 | struct perf_data_file input; | |
55 | u64 bytes_written; | |
56 | }; | |
57 | ||
58 | #define hmax(a, b) ((a) > (b) ? (a) : (b)) | |
59 | #define get_jit_tool(t) (container_of(tool, struct jit_tool, tool)) | |
60 | ||
61 | static int | |
62 | jit_emit_elf(char *filename, | |
63 | const char *sym, | |
64 | uint64_t code_addr, | |
65 | const void *code, | |
598b7c69 SE |
66 | int csize, |
67 | void *debug, | |
68 | int nr_debug_entries) | |
9b07e27f SE |
69 | { |
70 | int ret, fd; | |
71 | ||
72 | if (verbose > 0) | |
73 | fprintf(stderr, "write ELF image %s\n", filename); | |
74 | ||
75 | fd = open(filename, O_CREAT|O_TRUNC|O_WRONLY, 0644); | |
76 | if (fd == -1) { | |
77 | pr_warning("cannot create jit ELF %s: %s\n", filename, strerror(errno)); | |
78 | return -1; | |
79 | } | |
80 | ||
598b7c69 | 81 | ret = jit_write_elf(fd, code_addr, sym, (const void *)code, csize, debug, nr_debug_entries); |
9b07e27f SE |
82 | |
83 | close(fd); | |
84 | ||
85 | if (ret) | |
86 | unlink(filename); | |
87 | ||
88 | return ret; | |
89 | } | |
90 | ||
91 | static void | |
92 | jit_close(struct jit_buf_desc *jd) | |
93 | { | |
94 | if (!(jd && jd->in)) | |
95 | return; | |
96 | funlockfile(jd->in); | |
97 | fclose(jd->in); | |
98 | jd->in = NULL; | |
99 | } | |
100 | ||
101 | static int | |
102 | jit_open(struct jit_buf_desc *jd, const char *name) | |
103 | { | |
104 | struct jitheader header; | |
105 | struct jr_prefix *prefix; | |
106 | ssize_t bs, bsz = 0; | |
107 | void *n, *buf = NULL; | |
108 | int ret, retval = -1; | |
109 | ||
110 | jd->in = fopen(name, "r"); | |
111 | if (!jd->in) | |
112 | return -1; | |
113 | ||
114 | bsz = hmax(sizeof(header), sizeof(*prefix)); | |
115 | ||
116 | buf = malloc(bsz); | |
117 | if (!buf) | |
118 | goto error; | |
119 | ||
120 | /* | |
121 | * protect from writer modifying the file while we are reading it | |
122 | */ | |
123 | flockfile(jd->in); | |
124 | ||
125 | ret = fread(buf, sizeof(header), 1, jd->in); | |
126 | if (ret != 1) | |
127 | goto error; | |
128 | ||
129 | memcpy(&header, buf, sizeof(header)); | |
130 | ||
131 | if (header.magic != JITHEADER_MAGIC) { | |
132 | if (header.magic != JITHEADER_MAGIC_SW) | |
133 | goto error; | |
134 | jd->needs_bswap = true; | |
135 | } | |
136 | ||
137 | if (jd->needs_bswap) { | |
138 | header.version = bswap_32(header.version); | |
139 | header.total_size = bswap_32(header.total_size); | |
140 | header.pid = bswap_32(header.pid); | |
141 | header.elf_mach = bswap_32(header.elf_mach); | |
142 | header.timestamp = bswap_64(header.timestamp); | |
143 | header.flags = bswap_64(header.flags); | |
144 | } | |
145 | ||
146 | if (verbose > 2) | |
147 | pr_debug("version=%u\nhdr.size=%u\nts=0x%llx\npid=%d\nelf_mach=%d\n", | |
148 | header.version, | |
149 | header.total_size, | |
150 | (unsigned long long)header.timestamp, | |
151 | header.pid, | |
152 | header.elf_mach); | |
153 | ||
154 | if (header.flags & JITDUMP_FLAGS_RESERVED) { | |
155 | pr_err("jitdump file contains invalid or unsupported flags 0x%llx\n", | |
156 | (unsigned long long)header.flags & JITDUMP_FLAGS_RESERVED); | |
157 | goto error; | |
158 | } | |
159 | ||
160 | bs = header.total_size - sizeof(header); | |
161 | ||
162 | if (bs > bsz) { | |
163 | n = realloc(buf, bs); | |
164 | if (!n) | |
165 | goto error; | |
166 | bsz = bs; | |
167 | buf = n; | |
168 | /* read extra we do not know about */ | |
169 | ret = fread(buf, bs - bsz, 1, jd->in); | |
170 | if (ret != 1) | |
171 | goto error; | |
172 | } | |
173 | /* | |
174 | * keep dirname for generating files and mmap records | |
175 | */ | |
176 | strcpy(jd->dir, name); | |
177 | dirname(jd->dir); | |
178 | ||
179 | return 0; | |
180 | error: | |
181 | funlockfile(jd->in); | |
182 | fclose(jd->in); | |
183 | return retval; | |
184 | } | |
185 | ||
186 | static union jr_entry * | |
187 | jit_get_next_entry(struct jit_buf_desc *jd) | |
188 | { | |
189 | struct jr_prefix *prefix; | |
190 | union jr_entry *jr; | |
191 | void *addr; | |
192 | size_t bs, size; | |
193 | int id, ret; | |
194 | ||
195 | if (!(jd && jd->in)) | |
196 | return NULL; | |
197 | ||
198 | if (jd->buf == NULL) { | |
199 | size_t sz = getpagesize(); | |
200 | if (sz < sizeof(*prefix)) | |
201 | sz = sizeof(*prefix); | |
202 | ||
203 | jd->buf = malloc(sz); | |
204 | if (jd->buf == NULL) | |
205 | return NULL; | |
206 | ||
207 | jd->bufsize = sz; | |
208 | } | |
209 | ||
210 | prefix = jd->buf; | |
211 | ||
212 | /* | |
213 | * file is still locked at this point | |
214 | */ | |
215 | ret = fread(prefix, sizeof(*prefix), 1, jd->in); | |
216 | if (ret != 1) | |
217 | return NULL; | |
218 | ||
219 | if (jd->needs_bswap) { | |
220 | prefix->id = bswap_32(prefix->id); | |
221 | prefix->total_size = bswap_32(prefix->total_size); | |
222 | prefix->timestamp = bswap_64(prefix->timestamp); | |
223 | } | |
224 | id = prefix->id; | |
225 | size = prefix->total_size; | |
226 | ||
227 | bs = (size_t)size; | |
228 | if (bs < sizeof(*prefix)) | |
229 | return NULL; | |
230 | ||
231 | if (id >= JIT_CODE_MAX) { | |
232 | pr_warning("next_entry: unknown prefix %d, skipping\n", id); | |
233 | return NULL; | |
234 | } | |
235 | if (bs > jd->bufsize) { | |
236 | void *n; | |
237 | n = realloc(jd->buf, bs); | |
238 | if (!n) | |
239 | return NULL; | |
240 | jd->buf = n; | |
241 | jd->bufsize = bs; | |
242 | } | |
243 | ||
244 | addr = ((void *)jd->buf) + sizeof(*prefix); | |
245 | ||
246 | ret = fread(addr, bs - sizeof(*prefix), 1, jd->in); | |
247 | if (ret != 1) | |
248 | return NULL; | |
249 | ||
250 | jr = (union jr_entry *)jd->buf; | |
251 | ||
252 | switch(id) { | |
253 | case JIT_CODE_DEBUG_INFO: | |
254 | if (jd->needs_bswap) { | |
255 | uint64_t n; | |
256 | jr->info.code_addr = bswap_64(jr->info.code_addr); | |
257 | jr->info.nr_entry = bswap_64(jr->info.nr_entry); | |
258 | for (n = 0 ; n < jr->info.nr_entry; n++) { | |
259 | jr->info.entries[n].addr = bswap_64(jr->info.entries[n].addr); | |
260 | jr->info.entries[n].lineno = bswap_32(jr->info.entries[n].lineno); | |
261 | jr->info.entries[n].discrim = bswap_32(jr->info.entries[n].discrim); | |
262 | } | |
263 | } | |
264 | break; | |
265 | case JIT_CODE_CLOSE: | |
266 | break; | |
267 | case JIT_CODE_LOAD: | |
268 | if (jd->needs_bswap) { | |
269 | jr->load.pid = bswap_32(jr->load.pid); | |
270 | jr->load.tid = bswap_32(jr->load.tid); | |
271 | jr->load.vma = bswap_64(jr->load.vma); | |
272 | jr->load.code_addr = bswap_64(jr->load.code_addr); | |
273 | jr->load.code_size = bswap_64(jr->load.code_size); | |
274 | jr->load.code_index= bswap_64(jr->load.code_index); | |
275 | } | |
276 | jd->code_load_count++; | |
277 | break; | |
278 | case JIT_CODE_MOVE: | |
279 | if (jd->needs_bswap) { | |
280 | jr->move.pid = bswap_32(jr->move.pid); | |
281 | jr->move.tid = bswap_32(jr->move.tid); | |
282 | jr->move.vma = bswap_64(jr->move.vma); | |
283 | jr->move.old_code_addr = bswap_64(jr->move.old_code_addr); | |
284 | jr->move.new_code_addr = bswap_64(jr->move.new_code_addr); | |
285 | jr->move.code_size = bswap_64(jr->move.code_size); | |
286 | jr->move.code_index = bswap_64(jr->move.code_index); | |
287 | } | |
288 | break; | |
289 | case JIT_CODE_MAX: | |
290 | default: | |
291 | return NULL; | |
292 | } | |
293 | return jr; | |
294 | } | |
295 | ||
296 | static int | |
297 | jit_inject_event(struct jit_buf_desc *jd, union perf_event *event) | |
298 | { | |
299 | ssize_t size; | |
300 | ||
301 | size = perf_data_file__write(jd->output, event, event->header.size); | |
302 | if (size < 0) | |
303 | return -1; | |
304 | ||
305 | jd->bytes_written += size; | |
306 | return 0; | |
307 | } | |
308 | ||
309 | static int jit_repipe_code_load(struct jit_buf_desc *jd, union jr_entry *jr) | |
310 | { | |
311 | struct perf_sample sample; | |
312 | union perf_event *event; | |
313 | struct perf_tool *tool = jd->session->tool; | |
314 | uint64_t code, addr; | |
315 | uintptr_t uaddr; | |
316 | char *filename; | |
317 | struct stat st; | |
318 | size_t size; | |
319 | u16 idr_size; | |
320 | const char *sym; | |
321 | uint32_t count; | |
322 | int ret, csize; | |
323 | pid_t pid, tid; | |
324 | struct { | |
325 | u32 pid, tid; | |
326 | u64 time; | |
327 | } *id; | |
328 | ||
329 | pid = jr->load.pid; | |
330 | tid = jr->load.tid; | |
331 | csize = jr->load.code_size; | |
332 | addr = jr->load.code_addr; | |
333 | sym = (void *)((unsigned long)jr + sizeof(jr->load)); | |
334 | code = (unsigned long)jr + jr->load.p.total_size - csize; | |
335 | count = jr->load.code_index; | |
336 | idr_size = jd->machine->id_hdr_size; | |
337 | ||
338 | event = calloc(1, sizeof(*event) + idr_size); | |
339 | if (!event) | |
340 | return -1; | |
341 | ||
342 | filename = event->mmap2.filename; | |
343 | size = snprintf(filename, PATH_MAX, "%s/jitted-%d-%u.so", | |
344 | jd->dir, | |
345 | pid, | |
346 | count); | |
347 | ||
348 | size++; /* for \0 */ | |
349 | ||
350 | size = PERF_ALIGN(size, sizeof(u64)); | |
351 | uaddr = (uintptr_t)code; | |
598b7c69 | 352 | ret = jit_emit_elf(filename, sym, addr, (const void *)uaddr, csize, jd->debug_data, jd->nr_debug_entries); |
9b07e27f SE |
353 | |
354 | if (jd->debug_data && jd->nr_debug_entries) { | |
355 | free(jd->debug_data); | |
356 | jd->debug_data = NULL; | |
357 | jd->nr_debug_entries = 0; | |
358 | } | |
359 | ||
360 | if (ret) { | |
361 | free(event); | |
362 | return -1; | |
363 | } | |
364 | if (stat(filename, &st)) | |
365 | memset(&st, 0, sizeof(stat)); | |
366 | ||
367 | event->mmap2.header.type = PERF_RECORD_MMAP2; | |
368 | event->mmap2.header.misc = PERF_RECORD_MISC_USER; | |
369 | event->mmap2.header.size = (sizeof(event->mmap2) - | |
370 | (sizeof(event->mmap2.filename) - size) + idr_size); | |
371 | ||
372 | event->mmap2.pgoff = GEN_ELF_TEXT_OFFSET; | |
373 | event->mmap2.start = addr; | |
374 | event->mmap2.len = csize; | |
375 | event->mmap2.pid = pid; | |
376 | event->mmap2.tid = tid; | |
377 | event->mmap2.ino = st.st_ino; | |
378 | event->mmap2.maj = major(st.st_dev); | |
379 | event->mmap2.min = minor(st.st_dev); | |
380 | event->mmap2.prot = st.st_mode; | |
381 | event->mmap2.flags = MAP_SHARED; | |
382 | event->mmap2.ino_generation = 1; | |
383 | ||
384 | id = (void *)((unsigned long)event + event->mmap.header.size - idr_size); | |
385 | if (jd->sample_type & PERF_SAMPLE_TID) { | |
386 | id->pid = pid; | |
387 | id->tid = tid; | |
388 | } | |
389 | if (jd->sample_type & PERF_SAMPLE_TIME) | |
390 | id->time = jr->load.p.timestamp; | |
391 | ||
392 | /* | |
393 | * create pseudo sample to induce dso hit increment | |
394 | * use first address as sample address | |
395 | */ | |
396 | memset(&sample, 0, sizeof(sample)); | |
397 | sample.pid = pid; | |
398 | sample.tid = tid; | |
399 | sample.time = id->time; | |
400 | sample.ip = addr; | |
401 | ||
402 | ret = perf_event__process_mmap2(tool, event, &sample, jd->machine); | |
403 | if (ret) | |
404 | return ret; | |
405 | ||
406 | ret = jit_inject_event(jd, event); | |
407 | /* | |
408 | * mark dso as use to generate buildid in the header | |
409 | */ | |
410 | if (!ret) | |
411 | build_id__mark_dso_hit(tool, event, &sample, NULL, jd->machine); | |
412 | ||
413 | return ret; | |
414 | } | |
415 | ||
416 | static int jit_repipe_code_move(struct jit_buf_desc *jd, union jr_entry *jr) | |
417 | { | |
418 | struct perf_sample sample; | |
419 | union perf_event *event; | |
420 | struct perf_tool *tool = jd->session->tool; | |
421 | char *filename; | |
422 | size_t size; | |
423 | struct stat st; | |
424 | u16 idr_size; | |
425 | int ret; | |
426 | pid_t pid, tid; | |
427 | struct { | |
428 | u32 pid, tid; | |
429 | u64 time; | |
430 | } *id; | |
431 | ||
432 | pid = jr->move.pid; | |
433 | tid = jr->move.tid; | |
434 | idr_size = jd->machine->id_hdr_size; | |
435 | ||
436 | /* | |
437 | * +16 to account for sample_id_all (hack) | |
438 | */ | |
439 | event = calloc(1, sizeof(*event) + 16); | |
440 | if (!event) | |
441 | return -1; | |
442 | ||
443 | filename = event->mmap2.filename; | |
444 | size = snprintf(filename, PATH_MAX, "%s/jitted-%d-%"PRIu64, | |
445 | jd->dir, | |
446 | pid, | |
447 | jr->move.code_index); | |
448 | ||
449 | size++; /* for \0 */ | |
450 | ||
451 | if (stat(filename, &st)) | |
452 | memset(&st, 0, sizeof(stat)); | |
453 | ||
454 | size = PERF_ALIGN(size, sizeof(u64)); | |
455 | ||
456 | event->mmap2.header.type = PERF_RECORD_MMAP2; | |
457 | event->mmap2.header.misc = PERF_RECORD_MISC_USER; | |
458 | event->mmap2.header.size = (sizeof(event->mmap2) - | |
459 | (sizeof(event->mmap2.filename) - size) + idr_size); | |
460 | event->mmap2.pgoff = GEN_ELF_TEXT_OFFSET; | |
461 | event->mmap2.start = jr->move.new_code_addr; | |
462 | event->mmap2.len = jr->move.code_size; | |
463 | event->mmap2.pid = pid; | |
464 | event->mmap2.tid = tid; | |
465 | event->mmap2.ino = st.st_ino; | |
466 | event->mmap2.maj = major(st.st_dev); | |
467 | event->mmap2.min = minor(st.st_dev); | |
468 | event->mmap2.prot = st.st_mode; | |
469 | event->mmap2.flags = MAP_SHARED; | |
470 | event->mmap2.ino_generation = 1; | |
471 | ||
472 | id = (void *)((unsigned long)event + event->mmap.header.size - idr_size); | |
473 | if (jd->sample_type & PERF_SAMPLE_TID) { | |
474 | id->pid = pid; | |
475 | id->tid = tid; | |
476 | } | |
477 | if (jd->sample_type & PERF_SAMPLE_TIME) | |
478 | id->time = jr->load.p.timestamp; | |
479 | ||
480 | /* | |
481 | * create pseudo sample to induce dso hit increment | |
482 | * use first address as sample address | |
483 | */ | |
484 | memset(&sample, 0, sizeof(sample)); | |
485 | sample.pid = pid; | |
486 | sample.tid = tid; | |
487 | sample.time = id->time; | |
488 | sample.ip = jr->move.new_code_addr; | |
489 | ||
490 | ret = perf_event__process_mmap2(tool, event, &sample, jd->machine); | |
491 | if (ret) | |
492 | return ret; | |
493 | ||
494 | ret = jit_inject_event(jd, event); | |
495 | if (!ret) | |
496 | build_id__mark_dso_hit(tool, event, &sample, NULL, jd->machine); | |
497 | ||
498 | return ret; | |
499 | } | |
500 | ||
501 | static int jit_repipe_debug_info(struct jit_buf_desc *jd, union jr_entry *jr) | |
502 | { | |
503 | void *data; | |
504 | size_t sz; | |
505 | ||
506 | if (!(jd && jr)) | |
507 | return -1; | |
508 | ||
509 | sz = jr->prefix.total_size - sizeof(jr->info); | |
510 | data = malloc(sz); | |
511 | if (!data) | |
512 | return -1; | |
513 | ||
514 | memcpy(data, &jr->info.entries, sz); | |
515 | ||
516 | jd->debug_data = data; | |
517 | ||
518 | /* | |
519 | * we must use nr_entry instead of size here because | |
520 | * we cannot distinguish actual entry from padding otherwise | |
521 | */ | |
522 | jd->nr_debug_entries = jr->info.nr_entry; | |
523 | ||
524 | return 0; | |
525 | } | |
526 | ||
527 | static int | |
528 | jit_process_dump(struct jit_buf_desc *jd) | |
529 | { | |
530 | union jr_entry *jr; | |
531 | int ret; | |
532 | ||
533 | while ((jr = jit_get_next_entry(jd))) { | |
534 | switch(jr->prefix.id) { | |
535 | case JIT_CODE_LOAD: | |
536 | ret = jit_repipe_code_load(jd, jr); | |
537 | break; | |
538 | case JIT_CODE_MOVE: | |
539 | ret = jit_repipe_code_move(jd, jr); | |
540 | break; | |
541 | case JIT_CODE_DEBUG_INFO: | |
542 | ret = jit_repipe_debug_info(jd, jr); | |
543 | break; | |
544 | default: | |
545 | ret = 0; | |
546 | continue; | |
547 | } | |
548 | } | |
549 | return ret; | |
550 | } | |
551 | ||
552 | static int | |
553 | jit_inject(struct jit_buf_desc *jd, char *path) | |
554 | { | |
555 | int ret; | |
556 | ||
557 | if (verbose > 0) | |
558 | fprintf(stderr, "injecting: %s\n", path); | |
559 | ||
560 | ret = jit_open(jd, path); | |
561 | if (ret) | |
562 | return -1; | |
563 | ||
564 | ret = jit_process_dump(jd); | |
565 | ||
566 | jit_close(jd); | |
567 | ||
568 | if (verbose > 0) | |
569 | fprintf(stderr, "injected: %s (%d)\n", path, ret); | |
570 | ||
571 | return 0; | |
572 | } | |
573 | ||
574 | /* | |
575 | * File must be with pattern .../jit-XXXX.dump | |
576 | * where XXXX is the PID of the process which did the mmap() | |
577 | * as captured in the RECORD_MMAP record | |
578 | */ | |
579 | static int | |
580 | jit_detect(char *mmap_name, pid_t pid) | |
581 | { | |
582 | char *p; | |
583 | char *end = NULL; | |
584 | pid_t pid2; | |
585 | ||
586 | if (verbose > 2) | |
587 | fprintf(stderr, "jit marker trying : %s\n", mmap_name); | |
588 | /* | |
589 | * get file name | |
590 | */ | |
591 | p = strrchr(mmap_name, '/'); | |
592 | if (!p) | |
593 | return -1; | |
594 | ||
595 | /* | |
596 | * match prefix | |
597 | */ | |
598 | if (strncmp(p, "/jit-", 5)) | |
599 | return -1; | |
600 | ||
601 | /* | |
602 | * skip prefix | |
603 | */ | |
604 | p += 5; | |
605 | ||
606 | /* | |
607 | * must be followed by a pid | |
608 | */ | |
609 | if (!isdigit(*p)) | |
610 | return -1; | |
611 | ||
612 | pid2 = (int)strtol(p, &end, 10); | |
613 | if (!end) | |
614 | return -1; | |
615 | ||
616 | /* | |
617 | * pid does not match mmap pid | |
618 | * pid==0 in system-wide mode (synthesized) | |
619 | */ | |
620 | if (pid && pid2 != pid) | |
621 | return -1; | |
622 | /* | |
623 | * validate suffix | |
624 | */ | |
625 | if (strcmp(end, ".dump")) | |
626 | return -1; | |
627 | ||
628 | if (verbose > 0) | |
629 | fprintf(stderr, "jit marker found: %s\n", mmap_name); | |
630 | ||
631 | return 0; | |
632 | } | |
633 | ||
634 | int | |
635 | jit_process(struct perf_session *session, | |
636 | struct perf_data_file *output, | |
637 | struct machine *machine, | |
638 | char *filename, | |
639 | pid_t pid, | |
640 | u64 *nbytes) | |
641 | { | |
642 | struct perf_evsel *first; | |
643 | struct jit_buf_desc jd; | |
644 | int ret; | |
645 | ||
646 | /* | |
647 | * first, detect marker mmap (i.e., the jitdump mmap) | |
648 | */ | |
649 | if (jit_detect(filename, pid)) | |
650 | return -1; | |
651 | ||
652 | memset(&jd, 0, sizeof(jd)); | |
653 | ||
654 | jd.session = session; | |
655 | jd.output = output; | |
656 | jd.machine = machine; | |
657 | ||
658 | /* | |
659 | * track sample_type to compute id_all layout | |
660 | * perf sets the same sample type to all events as of now | |
661 | */ | |
662 | first = perf_evlist__first(session->evlist); | |
663 | jd.sample_type = first->attr.sample_type; | |
664 | ||
665 | *nbytes = 0; | |
666 | ||
667 | ret = jit_inject(&jd, filename); | |
668 | if (!ret) | |
669 | *nbytes = jd.bytes_written; | |
670 | ||
671 | return ret; | |
672 | } |