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49a7f010 | 1 | #include <sys/sysmacros.h> |
9b07e27f SE |
2 | #include <sys/types.h> |
3 | #include <stdio.h> | |
4 | #include <stdlib.h> | |
5 | #include <string.h> | |
6 | #include <fcntl.h> | |
7 | #include <unistd.h> | |
8 | #include <inttypes.h> | |
9 | #include <byteswap.h> | |
10 | #include <sys/stat.h> | |
11 | #include <sys/mman.h> | |
12 | ||
13 | #include "util.h" | |
14 | #include "event.h" | |
15 | #include "debug.h" | |
16 | #include "evlist.h" | |
17 | #include "symbol.h" | |
18 | #include "strlist.h" | |
19 | #include <elf.h> | |
20 | ||
2a28e230 | 21 | #include "tsc.h" |
9b07e27f SE |
22 | #include "session.h" |
23 | #include "jit.h" | |
24 | #include "jitdump.h" | |
25 | #include "genelf.h" | |
26 | #include "../builtin.h" | |
27 | ||
28 | struct jit_buf_desc { | |
29 | struct perf_data_file *output; | |
30 | struct perf_session *session; | |
31 | struct machine *machine; | |
32 | union jr_entry *entry; | |
33 | void *buf; | |
34 | uint64_t sample_type; | |
35 | size_t bufsize; | |
36 | FILE *in; | |
37 | bool needs_bswap; /* handles cross-endianess */ | |
2a28e230 | 38 | bool use_arch_timestamp; |
9b07e27f SE |
39 | void *debug_data; |
40 | size_t nr_debug_entries; | |
41 | uint32_t code_load_count; | |
42 | u64 bytes_written; | |
43 | struct rb_root code_root; | |
44 | char dir[PATH_MAX]; | |
45 | }; | |
46 | ||
47 | struct debug_line_info { | |
48 | unsigned long vma; | |
49 | unsigned int lineno; | |
50 | /* The filename format is unspecified, absolute path, relative etc. */ | |
51 | char const filename[0]; | |
52 | }; | |
53 | ||
54 | struct jit_tool { | |
55 | struct perf_tool tool; | |
56 | struct perf_data_file output; | |
57 | struct perf_data_file input; | |
58 | u64 bytes_written; | |
59 | }; | |
60 | ||
61 | #define hmax(a, b) ((a) > (b) ? (a) : (b)) | |
62 | #define get_jit_tool(t) (container_of(tool, struct jit_tool, tool)) | |
63 | ||
64 | static int | |
65 | jit_emit_elf(char *filename, | |
66 | const char *sym, | |
67 | uint64_t code_addr, | |
68 | const void *code, | |
598b7c69 SE |
69 | int csize, |
70 | void *debug, | |
71 | int nr_debug_entries) | |
9b07e27f SE |
72 | { |
73 | int ret, fd; | |
74 | ||
75 | if (verbose > 0) | |
76 | fprintf(stderr, "write ELF image %s\n", filename); | |
77 | ||
78 | fd = open(filename, O_CREAT|O_TRUNC|O_WRONLY, 0644); | |
79 | if (fd == -1) { | |
80 | pr_warning("cannot create jit ELF %s: %s\n", filename, strerror(errno)); | |
81 | return -1; | |
82 | } | |
83 | ||
598b7c69 | 84 | ret = jit_write_elf(fd, code_addr, sym, (const void *)code, csize, debug, nr_debug_entries); |
9b07e27f SE |
85 | |
86 | close(fd); | |
87 | ||
88 | if (ret) | |
89 | unlink(filename); | |
90 | ||
91 | return ret; | |
92 | } | |
93 | ||
94 | static void | |
95 | jit_close(struct jit_buf_desc *jd) | |
96 | { | |
97 | if (!(jd && jd->in)) | |
98 | return; | |
99 | funlockfile(jd->in); | |
100 | fclose(jd->in); | |
101 | jd->in = NULL; | |
102 | } | |
103 | ||
4a018cc4 AH |
104 | static int |
105 | jit_validate_events(struct perf_session *session) | |
106 | { | |
107 | struct perf_evsel *evsel; | |
108 | ||
109 | /* | |
110 | * check that all events use CLOCK_MONOTONIC | |
111 | */ | |
e5cadb93 | 112 | evlist__for_each_entry(session->evlist, evsel) { |
4a018cc4 AH |
113 | if (evsel->attr.use_clockid == 0 || evsel->attr.clockid != CLOCK_MONOTONIC) |
114 | return -1; | |
115 | } | |
116 | return 0; | |
117 | } | |
118 | ||
9b07e27f SE |
119 | static int |
120 | jit_open(struct jit_buf_desc *jd, const char *name) | |
121 | { | |
122 | struct jitheader header; | |
123 | struct jr_prefix *prefix; | |
124 | ssize_t bs, bsz = 0; | |
125 | void *n, *buf = NULL; | |
126 | int ret, retval = -1; | |
127 | ||
128 | jd->in = fopen(name, "r"); | |
129 | if (!jd->in) | |
130 | return -1; | |
131 | ||
132 | bsz = hmax(sizeof(header), sizeof(*prefix)); | |
133 | ||
134 | buf = malloc(bsz); | |
135 | if (!buf) | |
136 | goto error; | |
137 | ||
138 | /* | |
139 | * protect from writer modifying the file while we are reading it | |
140 | */ | |
141 | flockfile(jd->in); | |
142 | ||
143 | ret = fread(buf, sizeof(header), 1, jd->in); | |
144 | if (ret != 1) | |
145 | goto error; | |
146 | ||
147 | memcpy(&header, buf, sizeof(header)); | |
148 | ||
149 | if (header.magic != JITHEADER_MAGIC) { | |
150 | if (header.magic != JITHEADER_MAGIC_SW) | |
151 | goto error; | |
152 | jd->needs_bswap = true; | |
153 | } | |
154 | ||
155 | if (jd->needs_bswap) { | |
156 | header.version = bswap_32(header.version); | |
157 | header.total_size = bswap_32(header.total_size); | |
158 | header.pid = bswap_32(header.pid); | |
159 | header.elf_mach = bswap_32(header.elf_mach); | |
160 | header.timestamp = bswap_64(header.timestamp); | |
161 | header.flags = bswap_64(header.flags); | |
162 | } | |
163 | ||
2a28e230 AH |
164 | jd->use_arch_timestamp = header.flags & JITDUMP_FLAGS_ARCH_TIMESTAMP; |
165 | ||
9b07e27f | 166 | if (verbose > 2) |
2a28e230 | 167 | pr_debug("version=%u\nhdr.size=%u\nts=0x%llx\npid=%d\nelf_mach=%d\nuse_arch_timestamp=%d\n", |
9b07e27f SE |
168 | header.version, |
169 | header.total_size, | |
170 | (unsigned long long)header.timestamp, | |
171 | header.pid, | |
2a28e230 AH |
172 | header.elf_mach, |
173 | jd->use_arch_timestamp); | |
9b07e27f SE |
174 | |
175 | if (header.flags & JITDUMP_FLAGS_RESERVED) { | |
176 | pr_err("jitdump file contains invalid or unsupported flags 0x%llx\n", | |
177 | (unsigned long long)header.flags & JITDUMP_FLAGS_RESERVED); | |
178 | goto error; | |
179 | } | |
180 | ||
2a28e230 AH |
181 | if (jd->use_arch_timestamp && !jd->session->time_conv.time_mult) { |
182 | pr_err("jitdump file uses arch timestamps but there is no timestamp conversion\n"); | |
183 | goto error; | |
184 | } | |
185 | ||
4a018cc4 AH |
186 | /* |
187 | * validate event is using the correct clockid | |
188 | */ | |
2a28e230 | 189 | if (!jd->use_arch_timestamp && jit_validate_events(jd->session)) { |
4a018cc4 AH |
190 | pr_err("error, jitted code must be sampled with perf record -k 1\n"); |
191 | goto error; | |
192 | } | |
193 | ||
9b07e27f SE |
194 | bs = header.total_size - sizeof(header); |
195 | ||
196 | if (bs > bsz) { | |
197 | n = realloc(buf, bs); | |
198 | if (!n) | |
199 | goto error; | |
200 | bsz = bs; | |
201 | buf = n; | |
202 | /* read extra we do not know about */ | |
203 | ret = fread(buf, bs - bsz, 1, jd->in); | |
204 | if (ret != 1) | |
205 | goto error; | |
206 | } | |
207 | /* | |
208 | * keep dirname for generating files and mmap records | |
209 | */ | |
210 | strcpy(jd->dir, name); | |
211 | dirname(jd->dir); | |
212 | ||
213 | return 0; | |
214 | error: | |
215 | funlockfile(jd->in); | |
216 | fclose(jd->in); | |
217 | return retval; | |
218 | } | |
219 | ||
220 | static union jr_entry * | |
221 | jit_get_next_entry(struct jit_buf_desc *jd) | |
222 | { | |
223 | struct jr_prefix *prefix; | |
224 | union jr_entry *jr; | |
225 | void *addr; | |
226 | size_t bs, size; | |
227 | int id, ret; | |
228 | ||
229 | if (!(jd && jd->in)) | |
230 | return NULL; | |
231 | ||
232 | if (jd->buf == NULL) { | |
233 | size_t sz = getpagesize(); | |
234 | if (sz < sizeof(*prefix)) | |
235 | sz = sizeof(*prefix); | |
236 | ||
237 | jd->buf = malloc(sz); | |
238 | if (jd->buf == NULL) | |
239 | return NULL; | |
240 | ||
241 | jd->bufsize = sz; | |
242 | } | |
243 | ||
244 | prefix = jd->buf; | |
245 | ||
246 | /* | |
247 | * file is still locked at this point | |
248 | */ | |
249 | ret = fread(prefix, sizeof(*prefix), 1, jd->in); | |
250 | if (ret != 1) | |
251 | return NULL; | |
252 | ||
253 | if (jd->needs_bswap) { | |
254 | prefix->id = bswap_32(prefix->id); | |
255 | prefix->total_size = bswap_32(prefix->total_size); | |
256 | prefix->timestamp = bswap_64(prefix->timestamp); | |
257 | } | |
258 | id = prefix->id; | |
259 | size = prefix->total_size; | |
260 | ||
261 | bs = (size_t)size; | |
262 | if (bs < sizeof(*prefix)) | |
263 | return NULL; | |
264 | ||
265 | if (id >= JIT_CODE_MAX) { | |
266 | pr_warning("next_entry: unknown prefix %d, skipping\n", id); | |
267 | return NULL; | |
268 | } | |
269 | if (bs > jd->bufsize) { | |
270 | void *n; | |
271 | n = realloc(jd->buf, bs); | |
272 | if (!n) | |
273 | return NULL; | |
274 | jd->buf = n; | |
275 | jd->bufsize = bs; | |
276 | } | |
277 | ||
278 | addr = ((void *)jd->buf) + sizeof(*prefix); | |
279 | ||
280 | ret = fread(addr, bs - sizeof(*prefix), 1, jd->in); | |
281 | if (ret != 1) | |
282 | return NULL; | |
283 | ||
284 | jr = (union jr_entry *)jd->buf; | |
285 | ||
286 | switch(id) { | |
287 | case JIT_CODE_DEBUG_INFO: | |
288 | if (jd->needs_bswap) { | |
289 | uint64_t n; | |
290 | jr->info.code_addr = bswap_64(jr->info.code_addr); | |
291 | jr->info.nr_entry = bswap_64(jr->info.nr_entry); | |
292 | for (n = 0 ; n < jr->info.nr_entry; n++) { | |
293 | jr->info.entries[n].addr = bswap_64(jr->info.entries[n].addr); | |
294 | jr->info.entries[n].lineno = bswap_32(jr->info.entries[n].lineno); | |
295 | jr->info.entries[n].discrim = bswap_32(jr->info.entries[n].discrim); | |
296 | } | |
297 | } | |
298 | break; | |
299 | case JIT_CODE_CLOSE: | |
300 | break; | |
301 | case JIT_CODE_LOAD: | |
302 | if (jd->needs_bswap) { | |
303 | jr->load.pid = bswap_32(jr->load.pid); | |
304 | jr->load.tid = bswap_32(jr->load.tid); | |
305 | jr->load.vma = bswap_64(jr->load.vma); | |
306 | jr->load.code_addr = bswap_64(jr->load.code_addr); | |
307 | jr->load.code_size = bswap_64(jr->load.code_size); | |
308 | jr->load.code_index= bswap_64(jr->load.code_index); | |
309 | } | |
310 | jd->code_load_count++; | |
311 | break; | |
312 | case JIT_CODE_MOVE: | |
313 | if (jd->needs_bswap) { | |
314 | jr->move.pid = bswap_32(jr->move.pid); | |
315 | jr->move.tid = bswap_32(jr->move.tid); | |
316 | jr->move.vma = bswap_64(jr->move.vma); | |
317 | jr->move.old_code_addr = bswap_64(jr->move.old_code_addr); | |
318 | jr->move.new_code_addr = bswap_64(jr->move.new_code_addr); | |
319 | jr->move.code_size = bswap_64(jr->move.code_size); | |
320 | jr->move.code_index = bswap_64(jr->move.code_index); | |
321 | } | |
322 | break; | |
323 | case JIT_CODE_MAX: | |
324 | default: | |
325 | return NULL; | |
326 | } | |
327 | return jr; | |
328 | } | |
329 | ||
330 | static int | |
331 | jit_inject_event(struct jit_buf_desc *jd, union perf_event *event) | |
332 | { | |
333 | ssize_t size; | |
334 | ||
335 | size = perf_data_file__write(jd->output, event, event->header.size); | |
336 | if (size < 0) | |
337 | return -1; | |
338 | ||
339 | jd->bytes_written += size; | |
340 | return 0; | |
341 | } | |
342 | ||
2a28e230 AH |
343 | static uint64_t convert_timestamp(struct jit_buf_desc *jd, uint64_t timestamp) |
344 | { | |
345 | struct perf_tsc_conversion tc; | |
346 | ||
347 | if (!jd->use_arch_timestamp) | |
348 | return timestamp; | |
349 | ||
350 | tc.time_shift = jd->session->time_conv.time_shift; | |
351 | tc.time_mult = jd->session->time_conv.time_mult; | |
352 | tc.time_zero = jd->session->time_conv.time_zero; | |
353 | ||
354 | if (!tc.time_mult) | |
355 | return 0; | |
356 | ||
357 | return tsc_to_perf_time(timestamp, &tc); | |
358 | } | |
359 | ||
9b07e27f SE |
360 | static int jit_repipe_code_load(struct jit_buf_desc *jd, union jr_entry *jr) |
361 | { | |
362 | struct perf_sample sample; | |
363 | union perf_event *event; | |
364 | struct perf_tool *tool = jd->session->tool; | |
365 | uint64_t code, addr; | |
366 | uintptr_t uaddr; | |
367 | char *filename; | |
368 | struct stat st; | |
369 | size_t size; | |
370 | u16 idr_size; | |
371 | const char *sym; | |
372 | uint32_t count; | |
373 | int ret, csize; | |
374 | pid_t pid, tid; | |
375 | struct { | |
376 | u32 pid, tid; | |
377 | u64 time; | |
378 | } *id; | |
379 | ||
380 | pid = jr->load.pid; | |
381 | tid = jr->load.tid; | |
382 | csize = jr->load.code_size; | |
383 | addr = jr->load.code_addr; | |
384 | sym = (void *)((unsigned long)jr + sizeof(jr->load)); | |
385 | code = (unsigned long)jr + jr->load.p.total_size - csize; | |
386 | count = jr->load.code_index; | |
387 | idr_size = jd->machine->id_hdr_size; | |
388 | ||
389 | event = calloc(1, sizeof(*event) + idr_size); | |
390 | if (!event) | |
391 | return -1; | |
392 | ||
393 | filename = event->mmap2.filename; | |
394 | size = snprintf(filename, PATH_MAX, "%s/jitted-%d-%u.so", | |
395 | jd->dir, | |
396 | pid, | |
397 | count); | |
398 | ||
399 | size++; /* for \0 */ | |
400 | ||
401 | size = PERF_ALIGN(size, sizeof(u64)); | |
402 | uaddr = (uintptr_t)code; | |
598b7c69 | 403 | ret = jit_emit_elf(filename, sym, addr, (const void *)uaddr, csize, jd->debug_data, jd->nr_debug_entries); |
9b07e27f SE |
404 | |
405 | if (jd->debug_data && jd->nr_debug_entries) { | |
406 | free(jd->debug_data); | |
407 | jd->debug_data = NULL; | |
408 | jd->nr_debug_entries = 0; | |
409 | } | |
410 | ||
411 | if (ret) { | |
412 | free(event); | |
413 | return -1; | |
414 | } | |
415 | if (stat(filename, &st)) | |
f56ebf20 | 416 | memset(&st, 0, sizeof(st)); |
9b07e27f SE |
417 | |
418 | event->mmap2.header.type = PERF_RECORD_MMAP2; | |
419 | event->mmap2.header.misc = PERF_RECORD_MISC_USER; | |
420 | event->mmap2.header.size = (sizeof(event->mmap2) - | |
421 | (sizeof(event->mmap2.filename) - size) + idr_size); | |
422 | ||
423 | event->mmap2.pgoff = GEN_ELF_TEXT_OFFSET; | |
424 | event->mmap2.start = addr; | |
425 | event->mmap2.len = csize; | |
426 | event->mmap2.pid = pid; | |
427 | event->mmap2.tid = tid; | |
428 | event->mmap2.ino = st.st_ino; | |
429 | event->mmap2.maj = major(st.st_dev); | |
430 | event->mmap2.min = minor(st.st_dev); | |
431 | event->mmap2.prot = st.st_mode; | |
432 | event->mmap2.flags = MAP_SHARED; | |
433 | event->mmap2.ino_generation = 1; | |
434 | ||
435 | id = (void *)((unsigned long)event + event->mmap.header.size - idr_size); | |
436 | if (jd->sample_type & PERF_SAMPLE_TID) { | |
437 | id->pid = pid; | |
438 | id->tid = tid; | |
439 | } | |
440 | if (jd->sample_type & PERF_SAMPLE_TIME) | |
2a28e230 | 441 | id->time = convert_timestamp(jd, jr->load.p.timestamp); |
9b07e27f SE |
442 | |
443 | /* | |
444 | * create pseudo sample to induce dso hit increment | |
445 | * use first address as sample address | |
446 | */ | |
447 | memset(&sample, 0, sizeof(sample)); | |
3ea223ad | 448 | sample.cpumode = PERF_RECORD_MISC_USER; |
9b07e27f SE |
449 | sample.pid = pid; |
450 | sample.tid = tid; | |
451 | sample.time = id->time; | |
452 | sample.ip = addr; | |
453 | ||
454 | ret = perf_event__process_mmap2(tool, event, &sample, jd->machine); | |
455 | if (ret) | |
456 | return ret; | |
457 | ||
458 | ret = jit_inject_event(jd, event); | |
459 | /* | |
460 | * mark dso as use to generate buildid in the header | |
461 | */ | |
462 | if (!ret) | |
463 | build_id__mark_dso_hit(tool, event, &sample, NULL, jd->machine); | |
464 | ||
465 | return ret; | |
466 | } | |
467 | ||
468 | static int jit_repipe_code_move(struct jit_buf_desc *jd, union jr_entry *jr) | |
469 | { | |
470 | struct perf_sample sample; | |
471 | union perf_event *event; | |
472 | struct perf_tool *tool = jd->session->tool; | |
473 | char *filename; | |
474 | size_t size; | |
475 | struct stat st; | |
476 | u16 idr_size; | |
477 | int ret; | |
478 | pid_t pid, tid; | |
479 | struct { | |
480 | u32 pid, tid; | |
481 | u64 time; | |
482 | } *id; | |
483 | ||
484 | pid = jr->move.pid; | |
485 | tid = jr->move.tid; | |
486 | idr_size = jd->machine->id_hdr_size; | |
487 | ||
488 | /* | |
489 | * +16 to account for sample_id_all (hack) | |
490 | */ | |
491 | event = calloc(1, sizeof(*event) + 16); | |
492 | if (!event) | |
493 | return -1; | |
494 | ||
495 | filename = event->mmap2.filename; | |
496 | size = snprintf(filename, PATH_MAX, "%s/jitted-%d-%"PRIu64, | |
497 | jd->dir, | |
498 | pid, | |
499 | jr->move.code_index); | |
500 | ||
501 | size++; /* for \0 */ | |
502 | ||
503 | if (stat(filename, &st)) | |
f56ebf20 | 504 | memset(&st, 0, sizeof(st)); |
9b07e27f SE |
505 | |
506 | size = PERF_ALIGN(size, sizeof(u64)); | |
507 | ||
508 | event->mmap2.header.type = PERF_RECORD_MMAP2; | |
509 | event->mmap2.header.misc = PERF_RECORD_MISC_USER; | |
510 | event->mmap2.header.size = (sizeof(event->mmap2) - | |
511 | (sizeof(event->mmap2.filename) - size) + idr_size); | |
512 | event->mmap2.pgoff = GEN_ELF_TEXT_OFFSET; | |
513 | event->mmap2.start = jr->move.new_code_addr; | |
514 | event->mmap2.len = jr->move.code_size; | |
515 | event->mmap2.pid = pid; | |
516 | event->mmap2.tid = tid; | |
517 | event->mmap2.ino = st.st_ino; | |
518 | event->mmap2.maj = major(st.st_dev); | |
519 | event->mmap2.min = minor(st.st_dev); | |
520 | event->mmap2.prot = st.st_mode; | |
521 | event->mmap2.flags = MAP_SHARED; | |
522 | event->mmap2.ino_generation = 1; | |
523 | ||
524 | id = (void *)((unsigned long)event + event->mmap.header.size - idr_size); | |
525 | if (jd->sample_type & PERF_SAMPLE_TID) { | |
526 | id->pid = pid; | |
527 | id->tid = tid; | |
528 | } | |
529 | if (jd->sample_type & PERF_SAMPLE_TIME) | |
2a28e230 | 530 | id->time = convert_timestamp(jd, jr->load.p.timestamp); |
9b07e27f SE |
531 | |
532 | /* | |
533 | * create pseudo sample to induce dso hit increment | |
534 | * use first address as sample address | |
535 | */ | |
536 | memset(&sample, 0, sizeof(sample)); | |
3ea223ad | 537 | sample.cpumode = PERF_RECORD_MISC_USER; |
9b07e27f SE |
538 | sample.pid = pid; |
539 | sample.tid = tid; | |
540 | sample.time = id->time; | |
541 | sample.ip = jr->move.new_code_addr; | |
542 | ||
543 | ret = perf_event__process_mmap2(tool, event, &sample, jd->machine); | |
544 | if (ret) | |
545 | return ret; | |
546 | ||
547 | ret = jit_inject_event(jd, event); | |
548 | if (!ret) | |
549 | build_id__mark_dso_hit(tool, event, &sample, NULL, jd->machine); | |
550 | ||
551 | return ret; | |
552 | } | |
553 | ||
554 | static int jit_repipe_debug_info(struct jit_buf_desc *jd, union jr_entry *jr) | |
555 | { | |
556 | void *data; | |
557 | size_t sz; | |
558 | ||
559 | if (!(jd && jr)) | |
560 | return -1; | |
561 | ||
562 | sz = jr->prefix.total_size - sizeof(jr->info); | |
563 | data = malloc(sz); | |
564 | if (!data) | |
565 | return -1; | |
566 | ||
567 | memcpy(data, &jr->info.entries, sz); | |
568 | ||
569 | jd->debug_data = data; | |
570 | ||
571 | /* | |
572 | * we must use nr_entry instead of size here because | |
573 | * we cannot distinguish actual entry from padding otherwise | |
574 | */ | |
575 | jd->nr_debug_entries = jr->info.nr_entry; | |
576 | ||
577 | return 0; | |
578 | } | |
579 | ||
580 | static int | |
581 | jit_process_dump(struct jit_buf_desc *jd) | |
582 | { | |
583 | union jr_entry *jr; | |
584 | int ret; | |
585 | ||
586 | while ((jr = jit_get_next_entry(jd))) { | |
587 | switch(jr->prefix.id) { | |
588 | case JIT_CODE_LOAD: | |
589 | ret = jit_repipe_code_load(jd, jr); | |
590 | break; | |
591 | case JIT_CODE_MOVE: | |
592 | ret = jit_repipe_code_move(jd, jr); | |
593 | break; | |
594 | case JIT_CODE_DEBUG_INFO: | |
595 | ret = jit_repipe_debug_info(jd, jr); | |
596 | break; | |
597 | default: | |
598 | ret = 0; | |
599 | continue; | |
600 | } | |
601 | } | |
602 | return ret; | |
603 | } | |
604 | ||
605 | static int | |
606 | jit_inject(struct jit_buf_desc *jd, char *path) | |
607 | { | |
608 | int ret; | |
609 | ||
610 | if (verbose > 0) | |
611 | fprintf(stderr, "injecting: %s\n", path); | |
612 | ||
613 | ret = jit_open(jd, path); | |
614 | if (ret) | |
615 | return -1; | |
616 | ||
617 | ret = jit_process_dump(jd); | |
618 | ||
619 | jit_close(jd); | |
620 | ||
621 | if (verbose > 0) | |
622 | fprintf(stderr, "injected: %s (%d)\n", path, ret); | |
623 | ||
624 | return 0; | |
625 | } | |
626 | ||
627 | /* | |
628 | * File must be with pattern .../jit-XXXX.dump | |
629 | * where XXXX is the PID of the process which did the mmap() | |
630 | * as captured in the RECORD_MMAP record | |
631 | */ | |
632 | static int | |
633 | jit_detect(char *mmap_name, pid_t pid) | |
634 | { | |
635 | char *p; | |
636 | char *end = NULL; | |
637 | pid_t pid2; | |
638 | ||
639 | if (verbose > 2) | |
640 | fprintf(stderr, "jit marker trying : %s\n", mmap_name); | |
641 | /* | |
642 | * get file name | |
643 | */ | |
644 | p = strrchr(mmap_name, '/'); | |
645 | if (!p) | |
646 | return -1; | |
647 | ||
648 | /* | |
649 | * match prefix | |
650 | */ | |
651 | if (strncmp(p, "/jit-", 5)) | |
652 | return -1; | |
653 | ||
654 | /* | |
655 | * skip prefix | |
656 | */ | |
657 | p += 5; | |
658 | ||
659 | /* | |
660 | * must be followed by a pid | |
661 | */ | |
662 | if (!isdigit(*p)) | |
663 | return -1; | |
664 | ||
665 | pid2 = (int)strtol(p, &end, 10); | |
666 | if (!end) | |
667 | return -1; | |
668 | ||
669 | /* | |
670 | * pid does not match mmap pid | |
671 | * pid==0 in system-wide mode (synthesized) | |
672 | */ | |
673 | if (pid && pid2 != pid) | |
674 | return -1; | |
675 | /* | |
676 | * validate suffix | |
677 | */ | |
678 | if (strcmp(end, ".dump")) | |
679 | return -1; | |
680 | ||
681 | if (verbose > 0) | |
682 | fprintf(stderr, "jit marker found: %s\n", mmap_name); | |
683 | ||
684 | return 0; | |
685 | } | |
686 | ||
687 | int | |
688 | jit_process(struct perf_session *session, | |
689 | struct perf_data_file *output, | |
690 | struct machine *machine, | |
691 | char *filename, | |
692 | pid_t pid, | |
693 | u64 *nbytes) | |
694 | { | |
695 | struct perf_evsel *first; | |
696 | struct jit_buf_desc jd; | |
697 | int ret; | |
698 | ||
699 | /* | |
700 | * first, detect marker mmap (i.e., the jitdump mmap) | |
701 | */ | |
702 | if (jit_detect(filename, pid)) | |
570735b3 | 703 | return 0; |
9b07e27f SE |
704 | |
705 | memset(&jd, 0, sizeof(jd)); | |
706 | ||
707 | jd.session = session; | |
708 | jd.output = output; | |
709 | jd.machine = machine; | |
710 | ||
711 | /* | |
712 | * track sample_type to compute id_all layout | |
713 | * perf sets the same sample type to all events as of now | |
714 | */ | |
715 | first = perf_evlist__first(session->evlist); | |
716 | jd.sample_type = first->attr.sample_type; | |
717 | ||
718 | *nbytes = 0; | |
719 | ||
720 | ret = jit_inject(&jd, filename); | |
570735b3 | 721 | if (!ret) { |
9b07e27f | 722 | *nbytes = jd.bytes_written; |
570735b3 AH |
723 | ret = 1; |
724 | } | |
9b07e27f SE |
725 | |
726 | return ret; | |
727 | } |