Commit | Line | Data |
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d7ba1388 MD |
1 | /* |
2 | * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca> | |
3 | * Copyright (C) 2014 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License, version 2 only, | |
7 | * as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along | |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
17 | */ | |
18 | ||
d7ba1388 MD |
19 | #include <getopt.h> |
20 | #include <signal.h> | |
21 | #include <stdio.h> | |
22 | #include <stdlib.h> | |
23 | #include <string.h> | |
24 | #include <sys/stat.h> | |
25 | #include <sys/types.h> | |
26 | #include <sys/stat.h> | |
27 | #include <sys/mman.h> | |
28 | #include <fcntl.h> | |
29 | #include <sys/wait.h> | |
30 | #include <unistd.h> | |
d7ba1388 MD |
31 | #include <ctype.h> |
32 | #include <dirent.h> | |
33 | #include <byteswap.h> | |
34 | #include <inttypes.h> | |
aa25d686 | 35 | #include <stdbool.h> |
d7ba1388 MD |
36 | |
37 | #include <version.h> | |
38 | #include <lttng/lttng.h> | |
39 | #include <common/common.h> | |
40 | ||
41 | #define DEFAULT_VIEWER "babeltrace" | |
42 | ||
43 | #define COPY_BUFLEN 4096 | |
44 | #define RB_CRASH_DUMP_ABI_LEN 32 | |
45 | ||
46 | #define RB_CRASH_DUMP_ABI_MAGIC_LEN 16 | |
47 | ||
48 | /* | |
49 | * The 128-bit magic number is xor'd in the process data so it does not | |
50 | * cause a false positive when searching for buffers by scanning memory. | |
51 | * The actual magic number is: | |
52 | * 0x17, 0x7B, 0xF1, 0x77, 0xBF, 0x17, 0x7B, 0xF1, | |
53 | * 0x77, 0xBF, 0x17, 0x7B, 0xF1, 0x77, 0xBF, 0x17, | |
54 | */ | |
55 | #define RB_CRASH_DUMP_ABI_MAGIC_XOR \ | |
56 | { \ | |
57 | 0x17 ^ 0xFF, 0x7B ^ 0xFF, 0xF1 ^ 0xFF, 0x77 ^ 0xFF, \ | |
58 | 0xBF ^ 0xFF, 0x17 ^ 0xFF, 0x7B ^ 0xFF, 0xF1 ^ 0xFF, \ | |
59 | 0x77 ^ 0xFF, 0xBF ^ 0xFF, 0x17 ^ 0xFF, 0x7B ^ 0xFF, \ | |
60 | 0xF1 ^ 0xFF, 0x77 ^ 0xFF, 0xBF ^ 0xFF, 0x17 ^ 0xFF, \ | |
61 | } | |
62 | ||
63 | /* | |
64 | * Non-static to ensure the compiler does not optimize away the xor. | |
65 | */ | |
66 | uint8_t lttng_crash_expected_magic_xor[] = RB_CRASH_DUMP_ABI_MAGIC_XOR; | |
67 | ||
68 | #define RB_CRASH_ENDIAN 0x1234 | |
69 | #define RB_CRASH_ENDIAN_REVERSE 0x3412 | |
70 | ||
71 | enum lttng_crash_type { | |
72 | LTTNG_CRASH_TYPE_UST = 0, | |
73 | LTTNG_CRASH_TYPE_KERNEL = 1, | |
74 | }; | |
75 | ||
76 | /* LTTng ring buffer defines (copied) */ | |
77 | ||
78 | #define HALF_ULONG_BITS(wl) (((wl) * CHAR_BIT) >> 1) | |
79 | ||
80 | #define SB_ID_OFFSET_SHIFT(wl) (HALF_ULONG_BITS(wl) + 1) | |
81 | #define SB_ID_OFFSET_COUNT(wl) (1UL << SB_ID_OFFSET_SHIFT(wl)) | |
82 | #define SB_ID_OFFSET_MASK(wl) (~(SB_ID_OFFSET_COUNT(wl) - 1)) | |
83 | /* | |
84 | * Lowest bit of top word half belongs to noref. Used only for overwrite mode. | |
85 | */ | |
86 | #define SB_ID_NOREF_SHIFT(wl) (SB_ID_OFFSET_SHIFT(wl) - 1) | |
87 | #define SB_ID_NOREF_COUNT(wl) (1UL << SB_ID_NOREF_SHIFT(wl)) | |
88 | #define SB_ID_NOREF_MASK(wl) SB_ID_NOREF_COUNT(wl) | |
89 | /* | |
90 | * In overwrite mode: lowest half of word is used for index. | |
91 | * Limit of 2^16 subbuffers per buffer on 32-bit, 2^32 on 64-bit. | |
92 | * In producer-consumer mode: whole word used for index. | |
93 | */ | |
94 | #define SB_ID_INDEX_SHIFT(wl) 0 | |
95 | #define SB_ID_INDEX_COUNT(wl) (1UL << SB_ID_INDEX_SHIFT(wl)) | |
96 | #define SB_ID_INDEX_MASK(wl) (SB_ID_NOREF_COUNT(wl) - 1) | |
97 | ||
98 | enum rb_modes { | |
99 | RING_BUFFER_OVERWRITE = 0, /* Overwrite when buffer full */ | |
100 | RING_BUFFER_DISCARD = 1, /* Discard when buffer full */ | |
101 | }; | |
102 | ||
103 | struct crash_abi_unknown { | |
104 | uint8_t magic[RB_CRASH_DUMP_ABI_MAGIC_LEN]; | |
8726a045 | 105 | uint64_t mmap_length; /* Overall length of crash record */ |
d7ba1388 MD |
106 | uint16_t endian; /* |
107 | * { 0x12, 0x34 }: big endian | |
108 | * { 0x34, 0x12 }: little endian | |
109 | */ | |
110 | uint16_t major; /* Major number. */ | |
111 | uint16_t minor; /* Minor number. */ | |
112 | uint8_t word_size; /* Word size (bytes). */ | |
113 | uint8_t layout_type; /* enum lttng_crash_layout */ | |
114 | } __attribute__((packed)); | |
115 | ||
116 | struct crash_abi_0_0 { | |
117 | struct crash_abi_unknown parent; | |
118 | ||
119 | struct { | |
120 | uint32_t prod_offset; | |
121 | uint32_t consumed_offset; | |
122 | uint32_t commit_hot_array; | |
123 | uint32_t commit_hot_seq; | |
124 | uint32_t buf_wsb_array; | |
125 | uint32_t buf_wsb_id; | |
126 | uint32_t sb_array; | |
127 | uint32_t sb_array_shmp_offset; | |
128 | uint32_t sb_backend_p_offset; | |
129 | uint32_t content_size; | |
130 | uint32_t packet_size; | |
131 | } __attribute__((packed)) offset; | |
132 | struct { | |
133 | uint8_t prod_offset; | |
134 | uint8_t consumed_offset; | |
135 | uint8_t commit_hot_seq; | |
136 | uint8_t buf_wsb_id; | |
137 | uint8_t sb_array_shmp_offset; | |
138 | uint8_t sb_backend_p_offset; | |
139 | uint8_t content_size; | |
140 | uint8_t packet_size; | |
141 | } __attribute__((packed)) length; | |
142 | struct { | |
143 | uint32_t commit_hot_array; | |
144 | uint32_t buf_wsb_array; | |
145 | uint32_t sb_array; | |
146 | } __attribute__((packed)) stride; | |
147 | ||
148 | uint64_t buf_size; /* Size of the buffer */ | |
149 | uint64_t subbuf_size; /* Sub-buffer size */ | |
150 | uint64_t num_subbuf; /* Number of sub-buffers for writer */ | |
151 | uint32_t mode; /* Buffer mode: 0: overwrite, 1: discard */ | |
152 | } __attribute__((packed)); | |
153 | ||
154 | struct lttng_crash_layout { | |
155 | struct { | |
156 | int prod_offset, consumed_offset, | |
157 | commit_hot_array, commit_hot_seq, | |
158 | buf_wsb_array, buf_wsb_id, | |
159 | sb_array, sb_array_shmp_offset, | |
160 | sb_backend_p_offset, content_size, | |
161 | packet_size; | |
162 | } offset; | |
163 | struct { | |
164 | int prod_offset, consumed_offset, | |
165 | commit_hot_seq, buf_wsb_id, | |
166 | sb_array_shmp_offset, sb_backend_p_offset, | |
167 | content_size, packet_size; | |
168 | } length; | |
169 | struct { | |
170 | int commit_hot_array, buf_wsb_array, sb_array; | |
171 | } stride; | |
172 | ||
173 | int reverse_byte_order; | |
174 | int word_size; | |
175 | ||
176 | uint64_t mmap_length; /* Length of crash record */ | |
177 | uint64_t buf_size; /* Size of the buffer */ | |
178 | uint64_t subbuf_size; /* Sub-buffer size */ | |
179 | uint64_t num_subbuf; /* Number of sub-buffers for writer */ | |
180 | uint32_t mode; /* Buffer mode: 0: overwrite, 1: discard */ | |
181 | }; | |
182 | ||
183 | /* Variables */ | |
184 | static char *progname, | |
9030e9a9 AB |
185 | *opt_viewer_path = NULL, |
186 | *opt_output_path = NULL; | |
d7ba1388 | 187 | |
a424227e | 188 | static char *input_path; |
d7ba1388 MD |
189 | |
190 | int lttng_opt_quiet, lttng_opt_verbose, lttng_opt_mi; | |
191 | ||
192 | enum { | |
193 | OPT_DUMP_OPTIONS, | |
194 | }; | |
195 | ||
196 | /* Getopt options. No first level command. */ | |
197 | static struct option long_options[] = { | |
198 | { "version", 0, NULL, 'V' }, | |
199 | { "help", 0, NULL, 'h' }, | |
200 | { "verbose", 0, NULL, 'v' }, | |
201 | { "viewer", 1, NULL, 'e' }, | |
202 | { "extract", 1, NULL, 'x' }, | |
203 | { "list-options", 0, NULL, OPT_DUMP_OPTIONS }, | |
204 | { NULL, 0, NULL, 0 }, | |
205 | }; | |
206 | ||
207 | static void usage(FILE *ofp) | |
208 | { | |
209 | fprintf(ofp, "LTTng Crash Trace Viewer " VERSION " - " VERSION_NAME "%s\n\n", | |
210 | GIT_VERSION[0] == '\0' ? "" : " - " GIT_VERSION); | |
acade31f | 211 | fprintf(ofp, "usage: lttng-crash [OPTIONS] FILE\n"); |
d7ba1388 MD |
212 | fprintf(ofp, "\n"); |
213 | fprintf(ofp, "Options:\n"); | |
214 | fprintf(ofp, " -V, --version Show version.\n"); | |
215 | fprintf(ofp, " -h, --help Show this help.\n"); | |
216 | fprintf(ofp, " --list-options Simple listing of lttng-crash options.\n"); | |
217 | fprintf(ofp, " -v, --verbose Increase verbosity.\n"); | |
218 | fprintf(ofp, " -e, --viewer Specify viewer and/or options to use. This will\n" | |
219 | " completely override the default viewers so please\n" | |
220 | " make sure to specify the full command. The trace\n" | |
221 | " directory paths appended at the end to the\n" | |
222 | " arguments.\n"); | |
223 | fprintf(ofp, " -x, --extract PATH Extract trace(s) to specified path. Don't view\n" | |
224 | " trace.\n"); | |
225 | fprintf(ofp, "\n"); | |
226 | fprintf(ofp, "Please see the lttng-crash(1) man page for full documentation.\n"); | |
227 | fprintf(ofp, "See http://lttng.org for updates, bug reports and news.\n"); | |
228 | } | |
229 | ||
230 | static void version(FILE *ofp) | |
231 | { | |
232 | fprintf(ofp, "%s (LTTng Crash Trace Viewer) " VERSION " - " VERSION_NAME | |
233 | "%s\n", | |
234 | progname, | |
235 | GIT_VERSION[0] == '\0' ? "" : " - " GIT_VERSION); | |
236 | } | |
237 | ||
238 | /* | |
239 | * list_options | |
240 | * | |
241 | * List options line by line. This is mostly for bash auto completion and to | |
242 | * avoid difficult parsing. | |
243 | */ | |
244 | static void list_options(FILE *ofp) | |
245 | { | |
246 | int i = 0; | |
247 | struct option *option = NULL; | |
248 | ||
249 | option = &long_options[i]; | |
250 | while (option->name != NULL) { | |
251 | fprintf(ofp, "--%s\n", option->name); | |
252 | ||
253 | if (isprint(option->val)) { | |
254 | fprintf(ofp, "-%c\n", option->val); | |
255 | } | |
256 | ||
257 | i++; | |
258 | option = &long_options[i]; | |
259 | } | |
260 | } | |
261 | ||
262 | /* | |
263 | * Parse command line arguments. | |
264 | * | |
265 | * Return 0 if OK, else -1 | |
266 | */ | |
267 | static int parse_args(int argc, char **argv) | |
268 | { | |
269 | int opt, ret = 0; | |
270 | ||
271 | if (argc < 2) { | |
272 | usage(stderr); | |
273 | exit(EXIT_FAILURE); | |
274 | } | |
275 | ||
d07f3d99 | 276 | while ((opt = getopt_long(argc, argv, "+Vhve:x:", long_options, NULL)) != -1) { |
d7ba1388 MD |
277 | switch (opt) { |
278 | case 'V': | |
279 | version(stdout); | |
280 | ret = 1; | |
281 | goto end; | |
282 | case 'h': | |
283 | usage(stdout); | |
284 | ret = 1; | |
285 | goto end; | |
286 | case 'v': | |
287 | /* There is only 3 possible level of verbosity. (-vvv) */ | |
288 | if (lttng_opt_verbose < 3) { | |
289 | lttng_opt_verbose += 1; | |
290 | } | |
291 | break; | |
292 | case 'e': | |
9030e9a9 | 293 | free(opt_viewer_path); |
d7ba1388 MD |
294 | opt_viewer_path = strdup(optarg); |
295 | break; | |
296 | case 'x': | |
9030e9a9 | 297 | free(opt_output_path); |
d7ba1388 MD |
298 | opt_output_path = strdup(optarg); |
299 | break; | |
300 | case OPT_DUMP_OPTIONS: | |
301 | list_options(stdout); | |
302 | ret = 1; | |
303 | goto end; | |
304 | default: | |
305 | usage(stderr); | |
306 | goto error; | |
307 | } | |
308 | } | |
309 | ||
9030e9a9 AB |
310 | if (!opt_viewer_path) { |
311 | opt_viewer_path = DEFAULT_VIEWER; | |
312 | } | |
313 | ||
a424227e MD |
314 | /* No leftovers, or more than one input path, print usage and quit */ |
315 | if ((argc - optind) == 0 || (argc - optind) > 1) { | |
d7ba1388 MD |
316 | usage(stderr); |
317 | goto error; | |
318 | } | |
319 | ||
a424227e | 320 | input_path = argv[optind]; |
d7ba1388 MD |
321 | end: |
322 | return ret; | |
323 | ||
324 | error: | |
325 | return -1; | |
326 | } | |
327 | ||
328 | static | |
329 | int copy_file(const char *file_dest, const char *file_src) | |
330 | { | |
8726a045 | 331 | int fd_src = -1, fd_dest = -1; |
d7ba1388 MD |
332 | ssize_t readlen, writelen; |
333 | char buf[COPY_BUFLEN]; | |
8726a045 | 334 | int ret; |
d7ba1388 MD |
335 | |
336 | DBG("Copy metadata file '%s' into '%s'", file_src, file_dest); | |
337 | ||
338 | fd_src = open(file_src, O_RDONLY); | |
339 | if (fd_src < 0) { | |
340 | PERROR("Error opening %s for reading", file_src); | |
8726a045 JR |
341 | ret = -errno; |
342 | goto error; | |
d7ba1388 MD |
343 | } |
344 | fd_dest = open(file_dest, O_RDWR | O_CREAT | O_EXCL, | |
345 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
346 | if (fd_dest < 0) { | |
347 | PERROR("Error opening %s for writing", file_dest); | |
8726a045 JR |
348 | ret = -errno; |
349 | goto error; | |
d7ba1388 MD |
350 | } |
351 | ||
352 | for (;;) { | |
353 | readlen = lttng_read(fd_src, buf, COPY_BUFLEN); | |
354 | if (readlen < 0) { | |
355 | PERROR("Error reading input file"); | |
8726a045 JR |
356 | ret = -1; |
357 | goto error; | |
d7ba1388 MD |
358 | } |
359 | if (!readlen) { | |
360 | break; | |
361 | } | |
362 | writelen = lttng_write(fd_dest, buf, readlen); | |
363 | if (writelen < readlen) { | |
364 | PERROR("Error writing to output file"); | |
8726a045 JR |
365 | ret = -1; |
366 | goto error; | |
367 | } | |
368 | } | |
369 | ||
370 | ret = 0; | |
371 | error: | |
372 | if (fd_src >= 0) { | |
373 | if (close(fd_src) < 0) { | |
374 | PERROR("Error closing %s", file_src); | |
375 | } | |
376 | } | |
377 | ||
378 | if (fd_dest >= 0) { | |
379 | if (close(fd_dest) < 0) { | |
380 | PERROR("Error closing %s", file_dest); | |
d7ba1388 MD |
381 | } |
382 | } | |
8726a045 | 383 | return ret; |
d7ba1388 MD |
384 | } |
385 | ||
386 | static | |
387 | uint64_t _crash_get_field(const struct lttng_crash_layout *layout, | |
388 | const char *ptr, size_t size) | |
389 | { | |
390 | switch (size) { | |
391 | case 1: return *(uint8_t *) ptr; | |
392 | case 2: if (layout->reverse_byte_order) { | |
393 | return __bswap_16(*(uint16_t *) ptr); | |
394 | } else { | |
395 | return *(uint16_t *) ptr; | |
396 | ||
397 | } | |
398 | case 4: if (layout->reverse_byte_order) { | |
399 | return __bswap_32(*(uint32_t *) ptr); | |
400 | } else { | |
401 | return *(uint32_t *) ptr; | |
402 | ||
403 | } | |
404 | case 8: if (layout->reverse_byte_order) { | |
405 | return __bswap_64(*(uint64_t *) ptr); | |
406 | } else { | |
407 | return *(uint64_t *) ptr; | |
408 | } | |
409 | default: | |
410 | abort(); | |
411 | return -1; | |
412 | } | |
413 | ||
414 | } | |
415 | ||
416 | #define crash_get_field(layout, map, name) \ | |
417 | _crash_get_field(layout, (map) + (layout)->offset.name, \ | |
418 | layout->length.name) | |
419 | ||
420 | #define crash_get_array_field(layout, map, array_name, idx, field_name) \ | |
421 | _crash_get_field(layout, \ | |
422 | (map) + (layout)->offset.array_name \ | |
423 | + (idx * (layout)->stride.array_name) \ | |
424 | + (layout)->offset.field_name, \ | |
425 | (layout)->length.field_name) | |
426 | ||
427 | #define crash_get_hdr_raw_field(layout, hdr, name) ((hdr)->name) | |
428 | ||
429 | #define crash_get_hdr_field(layout, hdr, name) \ | |
430 | _crash_get_field(layout, (const char *) &(hdr)->name, \ | |
431 | sizeof((hdr)->name)) | |
432 | ||
433 | #define crash_get_layout(layout, hdr, name) \ | |
434 | do { \ | |
435 | (layout)->name = crash_get_hdr_field(layout, hdr, \ | |
436 | name); \ | |
437 | DBG("layout.%s = %" PRIu64, #name, \ | |
438 | (uint64_t) (layout)->name); \ | |
439 | } while (0) | |
440 | ||
441 | static | |
442 | int get_crash_layout_0_0(struct lttng_crash_layout *layout, | |
443 | char *map) | |
444 | { | |
445 | const struct crash_abi_0_0 *abi = (const struct crash_abi_0_0 *) map; | |
446 | ||
447 | crash_get_layout(layout, abi, offset.prod_offset); | |
448 | crash_get_layout(layout, abi, offset.consumed_offset); | |
449 | crash_get_layout(layout, abi, offset.commit_hot_array); | |
450 | crash_get_layout(layout, abi, offset.commit_hot_seq); | |
451 | crash_get_layout(layout, abi, offset.buf_wsb_array); | |
452 | crash_get_layout(layout, abi, offset.buf_wsb_id); | |
453 | crash_get_layout(layout, abi, offset.sb_array); | |
454 | crash_get_layout(layout, abi, offset.sb_array_shmp_offset); | |
455 | crash_get_layout(layout, abi, offset.sb_backend_p_offset); | |
456 | crash_get_layout(layout, abi, offset.content_size); | |
457 | crash_get_layout(layout, abi, offset.packet_size); | |
458 | ||
459 | crash_get_layout(layout, abi, length.prod_offset); | |
460 | crash_get_layout(layout, abi, length.consumed_offset); | |
461 | crash_get_layout(layout, abi, length.commit_hot_seq); | |
462 | crash_get_layout(layout, abi, length.buf_wsb_id); | |
463 | crash_get_layout(layout, abi, length.sb_array_shmp_offset); | |
464 | crash_get_layout(layout, abi, length.sb_backend_p_offset); | |
465 | crash_get_layout(layout, abi, length.content_size); | |
466 | crash_get_layout(layout, abi, length.packet_size); | |
467 | ||
468 | crash_get_layout(layout, abi, stride.commit_hot_array); | |
469 | crash_get_layout(layout, abi, stride.buf_wsb_array); | |
470 | crash_get_layout(layout, abi, stride.sb_array); | |
471 | ||
472 | crash_get_layout(layout, abi, buf_size); | |
473 | crash_get_layout(layout, abi, subbuf_size); | |
474 | crash_get_layout(layout, abi, num_subbuf); | |
475 | crash_get_layout(layout, abi, mode); | |
476 | ||
477 | return 0; | |
478 | } | |
479 | ||
480 | static | |
481 | void print_dbg_magic(const uint8_t *magic) | |
482 | { | |
483 | DBG("magic: 0x%X%X%X%X%X%X%X%X%X%X%X%X%X%X%X%X", | |
484 | magic[0], magic[1], magic[2], magic[3], | |
485 | magic[4], magic[5], magic[6], magic[7], | |
486 | magic[8], magic[9], magic[10], magic[11], | |
487 | magic[12], magic[13], magic[14], magic[15]); | |
488 | } | |
489 | ||
490 | static | |
491 | int check_magic(const uint8_t *magic) | |
492 | { | |
493 | int i; | |
494 | ||
495 | for (i = 0; i < RB_CRASH_DUMP_ABI_MAGIC_LEN; i++) { | |
496 | if ((magic[i] ^ 0xFF) != lttng_crash_expected_magic_xor[i]) { | |
497 | return -1; | |
498 | } | |
499 | } | |
500 | return 0; | |
501 | } | |
502 | ||
503 | static | |
504 | int get_crash_layout(struct lttng_crash_layout *layout, int fd) | |
505 | { | |
506 | char *map; | |
507 | int ret = 0, unmapret; | |
508 | const uint8_t *magic; | |
509 | uint64_t mmap_length; | |
510 | uint16_t major, minor; | |
511 | uint8_t word_size; | |
512 | const struct crash_abi_unknown *abi; | |
513 | uint16_t endian; | |
514 | enum lttng_crash_type layout_type; | |
515 | ||
516 | map = mmap(NULL, RB_CRASH_DUMP_ABI_LEN, PROT_READ, MAP_PRIVATE, | |
517 | fd, 0); | |
518 | if (map == MAP_FAILED) { | |
519 | PERROR("Mapping file"); | |
520 | return -1; | |
521 | } | |
522 | abi = (const struct crash_abi_unknown *) map; | |
523 | magic = crash_get_hdr_raw_field(layout, abi, magic); | |
524 | print_dbg_magic(magic); | |
525 | if (check_magic(magic)) { | |
526 | DBG("Unknown magic number"); | |
527 | ret = 1; /* positive return value, skip */ | |
528 | goto end; | |
529 | } | |
530 | endian = crash_get_hdr_field(layout, abi, endian); | |
531 | switch (endian) { | |
532 | case RB_CRASH_ENDIAN: | |
533 | break; | |
534 | case RB_CRASH_ENDIAN_REVERSE: | |
535 | layout->reverse_byte_order = 1; | |
536 | break; | |
537 | default: | |
538 | DBG("Unknown endianness value: 0x%X", (unsigned int) endian); | |
539 | ret = 1; /* positive return value, skip */ | |
540 | goto end; | |
541 | } | |
542 | layout_type = (enum lttng_crash_type) crash_get_hdr_field(layout, abi, layout_type); | |
543 | switch (layout_type) { | |
544 | case LTTNG_CRASH_TYPE_UST: | |
545 | break; | |
546 | case LTTNG_CRASH_TYPE_KERNEL: | |
547 | ERR("lttng-modules buffer layout support not implemented"); | |
548 | ret = 1; /* positive return value, skip */ | |
549 | goto end; | |
550 | default: | |
551 | ERR("Unknown layout type %u", (unsigned int) layout_type); | |
552 | ret = 1; /* positive return value, skip */ | |
553 | goto end; | |
554 | } | |
555 | mmap_length = crash_get_hdr_field(layout, abi, mmap_length); | |
556 | DBG("mmap_length: %" PRIu64, mmap_length); | |
557 | layout->mmap_length = mmap_length; | |
558 | major = crash_get_hdr_field(layout, abi, major); | |
559 | DBG("major: %u", major); | |
560 | minor = crash_get_hdr_field(layout, abi, minor); | |
561 | DBG("minor: %u", minor); | |
562 | word_size = crash_get_hdr_field(layout, abi, word_size); | |
563 | DBG("word_size: %u", word_size); | |
564 | switch (major) { | |
565 | case 0: | |
566 | switch (minor) { | |
567 | case 0: | |
568 | ret = get_crash_layout_0_0(layout, map); | |
569 | if (ret) | |
570 | goto end; | |
571 | break; | |
572 | default: | |
573 | ret = -1; | |
574 | ERR("Unsupported crash ABI %u.%u\n", major, minor); | |
575 | goto end; | |
576 | } | |
577 | break; | |
578 | default: | |
579 | ERR("Unsupported crash ABI %u.%u\n", major, minor); | |
580 | ret = -1; | |
581 | goto end; | |
582 | } | |
583 | layout->word_size = word_size; | |
584 | end: | |
585 | unmapret = munmap(map, RB_CRASH_DUMP_ABI_LEN); | |
586 | if (unmapret) { | |
587 | PERROR("munmap"); | |
588 | } | |
589 | return ret; | |
590 | } | |
591 | ||
592 | /* buf_trunc mask selects only the buffer number. */ | |
593 | static inline | |
594 | uint64_t buf_trunc(uint64_t offset, uint64_t buf_size) | |
595 | { | |
596 | return offset & ~(buf_size - 1); | |
597 | } | |
598 | ||
599 | /* subbuf_trunc mask selects the subbuffer number. */ | |
600 | static inline | |
601 | uint64_t subbuf_trunc(uint64_t offset, uint64_t subbuf_size) | |
602 | { | |
603 | return offset & ~(subbuf_size - 1); | |
604 | } | |
605 | ||
606 | /* buf_offset mask selects only the offset within the current buffer. */ | |
607 | static inline | |
608 | uint64_t buf_offset(uint64_t offset, uint64_t buf_size) | |
609 | { | |
610 | return offset & (buf_size - 1); | |
611 | } | |
612 | ||
613 | /* subbuf_offset mask selects the offset within the current subbuffer. */ | |
614 | static inline | |
615 | uint64_t subbuf_offset(uint64_t offset, uint64_t subbuf_size) | |
616 | { | |
617 | return offset & (subbuf_size - 1); | |
618 | } | |
619 | ||
620 | /* subbuf_index returns the index of the current subbuffer within the buffer. */ | |
621 | static inline | |
622 | uint64_t subbuf_index(uint64_t offset, uint64_t buf_size, uint64_t subbuf_size) | |
623 | { | |
624 | return buf_offset(offset, buf_size) / subbuf_size; | |
625 | } | |
626 | ||
627 | static inline | |
628 | uint64_t subbuffer_id_get_index(uint32_t mode, uint64_t id, | |
629 | unsigned int wl) | |
630 | { | |
631 | if (mode == RING_BUFFER_OVERWRITE) | |
632 | return id & SB_ID_INDEX_MASK(wl); | |
633 | else | |
634 | return id; | |
635 | } | |
636 | ||
637 | static | |
638 | int copy_crash_subbuf(const struct lttng_crash_layout *layout, | |
639 | int fd_dest, char *buf, uint64_t offset) | |
640 | { | |
641 | uint64_t buf_size, subbuf_size, num_subbuf, sbidx, id, | |
642 | sb_bindex, rpages_offset, p_offset, seq_cc, | |
643 | committed, commit_count_mask, consumed_cur, | |
644 | packet_size; | |
645 | char *subbuf_ptr; | |
646 | ssize_t writelen; | |
647 | ||
648 | /* | |
649 | * Get the current subbuffer by applying the proper mask to | |
650 | * "offset", and looking up the subbuf location within the | |
651 | * source file buf. | |
652 | */ | |
653 | ||
654 | buf_size = layout->buf_size; | |
655 | subbuf_size = layout->subbuf_size; | |
656 | num_subbuf = layout->num_subbuf; | |
657 | ||
658 | switch (layout->word_size) { | |
659 | case 4: commit_count_mask = 0xFFFFFFFFULL / num_subbuf; | |
660 | break; | |
661 | case 8: commit_count_mask = 0xFFFFFFFFFFFFFFFFULL / num_subbuf; | |
662 | break; | |
663 | default: | |
664 | ERR("Unsupported word size: %u", | |
665 | (unsigned int) layout->word_size); | |
666 | return -EINVAL; | |
667 | } | |
668 | ||
5f98d630 | 669 | DBG("Copy crash subbuffer at offset %" PRIu64, offset); |
d7ba1388 MD |
670 | sbidx = subbuf_index(offset, buf_size, subbuf_size); |
671 | ||
672 | /* | |
673 | * Find where the seq cc is located. Compute length of data to | |
674 | * copy. | |
675 | */ | |
676 | seq_cc = crash_get_array_field(layout, buf, commit_hot_array, | |
677 | sbidx, commit_hot_seq); | |
678 | consumed_cur = crash_get_field(layout, buf, consumed_offset); | |
679 | ||
680 | /* | |
681 | * Check that the buffer we are getting is after or at | |
682 | * consumed_cur position. | |
683 | */ | |
684 | if ((long) subbuf_trunc(offset, subbuf_size) | |
685 | - (long) subbuf_trunc(consumed_cur, subbuf_size) < 0) { | |
686 | DBG("No data: position is before consumed_cur"); | |
687 | goto nodata; | |
688 | } | |
689 | ||
690 | /* | |
691 | * Check if subbuffer has been fully committed. | |
692 | */ | |
693 | if (((seq_cc - subbuf_size) & commit_count_mask) | |
694 | - (buf_trunc(offset, buf_size) / num_subbuf) | |
695 | == 0) { | |
696 | committed = subbuf_size; | |
697 | } else { | |
698 | committed = subbuf_offset(seq_cc, subbuf_size); | |
699 | if (!committed) { | |
700 | DBG("No data committed, seq_cc: %" PRIu64, seq_cc); | |
701 | goto nodata; | |
702 | } | |
703 | } | |
704 | ||
705 | /* Find actual physical offset in subbuffer table */ | |
706 | id = crash_get_array_field(layout, buf, buf_wsb_array, | |
707 | sbidx, buf_wsb_id); | |
708 | sb_bindex = subbuffer_id_get_index(layout->mode, id, | |
709 | layout->word_size); | |
710 | rpages_offset = crash_get_array_field(layout, buf, sb_array, | |
711 | sb_bindex, sb_array_shmp_offset); | |
712 | p_offset = crash_get_field(layout, buf + rpages_offset, | |
713 | sb_backend_p_offset); | |
714 | subbuf_ptr = buf + p_offset; | |
715 | ||
716 | if (committed == subbuf_size) { | |
717 | /* | |
718 | * Packet header can be used. | |
719 | */ | |
720 | if (layout->length.packet_size) { | |
721 | memcpy(&packet_size, | |
722 | subbuf_ptr + layout->offset.packet_size, | |
723 | layout->length.packet_size); | |
724 | if (layout->reverse_byte_order) { | |
725 | packet_size = __bswap_64(packet_size); | |
726 | } | |
727 | packet_size /= CHAR_BIT; | |
728 | } else { | |
729 | packet_size = subbuf_size; | |
730 | } | |
731 | } else { | |
732 | uint64_t patch_size; | |
733 | ||
734 | /* | |
735 | * Find where to patch the sub-buffer header with actual | |
736 | * readable data len and packet len, derived from seq | |
737 | * cc. Patch it in our in-memory copy. | |
738 | */ | |
739 | patch_size = committed * CHAR_BIT; | |
740 | if (layout->reverse_byte_order) { | |
741 | patch_size = __bswap_64(patch_size); | |
742 | } | |
743 | if (layout->length.content_size) { | |
744 | memcpy(subbuf_ptr + layout->offset.content_size, | |
745 | &patch_size, layout->length.content_size); | |
746 | } | |
747 | if (layout->length.packet_size) { | |
748 | memcpy(subbuf_ptr + layout->offset.packet_size, | |
749 | &patch_size, layout->length.packet_size); | |
750 | } | |
751 | packet_size = committed; | |
752 | } | |
753 | ||
754 | /* | |
755 | * Copy packet into fd_dest. | |
756 | */ | |
757 | writelen = lttng_write(fd_dest, subbuf_ptr, packet_size); | |
758 | if (writelen < packet_size) { | |
759 | PERROR("Error writing to output file"); | |
760 | return -1; | |
761 | } | |
762 | DBG("Copied %" PRIu64 " bytes of data", packet_size); | |
763 | return 0; | |
764 | ||
765 | nodata: | |
766 | return -ENODATA; | |
767 | } | |
768 | ||
769 | static | |
770 | int copy_crash_data(const struct lttng_crash_layout *layout, int fd_dest, | |
771 | int fd_src) | |
772 | { | |
773 | char *buf; | |
774 | int ret = 0, has_data = 0; | |
775 | struct stat statbuf; | |
776 | size_t src_file_len; | |
777 | uint64_t prod_offset, consumed_offset; | |
778 | uint64_t offset, subbuf_size; | |
779 | ssize_t readlen; | |
780 | ||
781 | ret = fstat(fd_src, &statbuf); | |
782 | if (ret) { | |
783 | return ret; | |
784 | } | |
785 | src_file_len = layout->mmap_length; | |
786 | buf = zmalloc(src_file_len); | |
787 | if (!buf) { | |
788 | return -1; | |
789 | } | |
790 | readlen = lttng_read(fd_src, buf, src_file_len); | |
791 | if (readlen < 0) { | |
792 | PERROR("Error reading input file"); | |
309fc9bf MD |
793 | ret = -1; |
794 | goto end; | |
d7ba1388 MD |
795 | } |
796 | ||
797 | prod_offset = crash_get_field(layout, buf, prod_offset); | |
798 | DBG("prod_offset: 0x%" PRIx64, prod_offset); | |
799 | consumed_offset = crash_get_field(layout, buf, consumed_offset); | |
800 | DBG("consumed_offset: 0x%" PRIx64, consumed_offset); | |
801 | subbuf_size = layout->subbuf_size; | |
802 | ||
803 | for (offset = consumed_offset; offset < prod_offset; | |
804 | offset += subbuf_size) { | |
805 | ret = copy_crash_subbuf(layout, fd_dest, buf, offset); | |
806 | if (!ret) { | |
807 | has_data = 1; | |
808 | } | |
809 | if (ret) { | |
810 | goto end; | |
811 | } | |
812 | } | |
813 | end: | |
814 | free(buf); | |
815 | if (ret && ret != -ENODATA) { | |
816 | return ret; | |
817 | } | |
818 | if (has_data) { | |
819 | return 0; | |
820 | } else { | |
821 | return -ENODATA; | |
822 | } | |
823 | } | |
824 | ||
825 | static | |
826 | int extract_file(int output_dir_fd, const char *output_file, | |
827 | int input_dir_fd, const char *input_file) | |
828 | { | |
829 | int fd_dest, fd_src, ret = 0, closeret; | |
830 | struct lttng_crash_layout layout; | |
831 | ||
832 | layout.reverse_byte_order = 0; /* For reading magic number */ | |
833 | ||
834 | DBG("Extract file '%s'", input_file); | |
835 | fd_src = openat(input_dir_fd, input_file, O_RDONLY); | |
836 | if (fd_src < 0) { | |
837 | PERROR("Error opening '%s' for reading", | |
838 | input_file); | |
839 | ret = -1; | |
840 | goto end; | |
841 | } | |
842 | ||
843 | /* Query the crash ABI layout */ | |
844 | ret = get_crash_layout(&layout, fd_src); | |
845 | if (ret) { | |
846 | goto close_src; | |
847 | } | |
848 | ||
849 | fd_dest = openat(output_dir_fd, output_file, | |
850 | O_RDWR | O_CREAT | O_EXCL, | |
851 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
852 | if (fd_dest < 0) { | |
853 | PERROR("Error opening '%s' for writing", | |
854 | output_file); | |
855 | ret = -1; | |
856 | goto close_src; | |
857 | } | |
858 | ||
859 | ret = copy_crash_data(&layout, fd_dest, fd_src); | |
860 | if (ret) { | |
861 | goto close_dest; | |
862 | } | |
863 | ||
864 | close_dest: | |
865 | closeret = close(fd_dest); | |
866 | if (closeret) { | |
867 | PERROR("close"); | |
868 | } | |
869 | if (ret == -ENODATA) { | |
870 | closeret = unlinkat(output_dir_fd, output_file, 0); | |
871 | if (closeret) { | |
872 | PERROR("unlinkat"); | |
873 | } | |
874 | } | |
875 | close_src: | |
876 | closeret = close(fd_src); | |
877 | if (closeret) { | |
878 | PERROR("close"); | |
879 | } | |
880 | end: | |
881 | return ret; | |
882 | } | |
883 | ||
884 | static | |
885 | int extract_all_files(const char *output_path, | |
886 | const char *input_path) | |
887 | { | |
888 | DIR *input_dir, *output_dir; | |
889 | int input_dir_fd, output_dir_fd, ret = 0, closeret; | |
890 | struct dirent *entry; /* input */ | |
891 | ||
892 | /* Open input directory */ | |
893 | input_dir = opendir(input_path); | |
894 | if (!input_dir) { | |
895 | PERROR("Cannot open '%s' path", input_path); | |
896 | return -1; | |
897 | } | |
898 | input_dir_fd = dirfd(input_dir); | |
899 | if (input_dir_fd < 0) { | |
900 | PERROR("dirfd"); | |
901 | return -1; | |
902 | } | |
903 | ||
904 | /* Open output directory */ | |
905 | output_dir = opendir(output_path); | |
906 | if (!output_dir) { | |
907 | PERROR("Cannot open '%s' path", output_path); | |
908 | return -1; | |
909 | } | |
910 | output_dir_fd = dirfd(output_dir); | |
911 | if (output_dir_fd < 0) { | |
912 | PERROR("dirfd"); | |
913 | return -1; | |
914 | } | |
915 | ||
916 | while ((entry = readdir(input_dir))) { | |
917 | if (!strcmp(entry->d_name, ".") | |
918 | || !strcmp(entry->d_name, "..")) | |
919 | continue; | |
920 | ret = extract_file(output_dir_fd, entry->d_name, | |
921 | input_dir_fd, entry->d_name); | |
922 | if (ret == -ENODATA) { | |
923 | DBG("No data in file '%s', skipping", entry->d_name); | |
924 | ret = 0; | |
925 | continue; | |
926 | } else if (ret < 0) { | |
927 | break; | |
928 | } else if (ret > 0) { | |
929 | DBG("Skipping file '%s'", entry->d_name); | |
930 | ret = 0; | |
931 | continue; | |
932 | } | |
933 | } | |
934 | closeret = closedir(output_dir); | |
935 | if (closeret) { | |
936 | PERROR("closedir"); | |
937 | } | |
938 | closeret = closedir(input_dir); | |
939 | if (closeret) { | |
940 | PERROR("closedir"); | |
941 | } | |
942 | return ret; | |
943 | } | |
944 | ||
945 | static | |
946 | int extract_one_trace(const char *output_path, | |
947 | const char *input_path) | |
948 | { | |
949 | char dest[PATH_MAX], src[PATH_MAX]; | |
950 | int ret; | |
951 | ||
952 | DBG("Extract crash trace '%s' into '%s'", input_path, output_path); | |
953 | ||
954 | /* Copy metadata */ | |
955 | strncpy(dest, output_path, PATH_MAX); | |
956 | dest[PATH_MAX - 1] = '\0'; | |
957 | strncat(dest, "/metadata", PATH_MAX - strlen(dest) - 1); | |
958 | ||
959 | strncpy(src, input_path, PATH_MAX); | |
960 | src[PATH_MAX - 1] = '\0'; | |
961 | strncat(src, "/metadata", PATH_MAX - strlen(dest) - 1); | |
962 | ||
963 | ret = copy_file(dest, src); | |
964 | if (ret) { | |
965 | return ret; | |
966 | } | |
967 | ||
968 | /* Extract each other file that has expected header */ | |
969 | return extract_all_files(output_path, input_path); | |
970 | } | |
971 | ||
972 | static | |
a424227e MD |
973 | int extract_trace_recursive(const char *output_path, |
974 | const char *input_path) | |
d7ba1388 | 975 | { |
a424227e MD |
976 | DIR *dir; |
977 | int dir_fd, ret = 0, closeret; | |
978 | struct dirent *entry; | |
d7ba1388 MD |
979 | int has_warning = 0; |
980 | ||
a424227e MD |
981 | /* Open directory */ |
982 | dir = opendir(input_path); | |
983 | if (!dir) { | |
984 | PERROR("Cannot open '%s' path", input_path); | |
985 | return -1; | |
986 | } | |
987 | dir_fd = dirfd(dir); | |
988 | if (dir_fd < 0) { | |
989 | PERROR("dirfd"); | |
d7ba1388 MD |
990 | return -1; |
991 | } | |
992 | ||
a424227e MD |
993 | while ((entry = readdir(dir))) { |
994 | if (!strcmp(entry->d_name, ".") | |
995 | || !strcmp(entry->d_name, "..")) { | |
996 | continue; | |
997 | } | |
998 | switch (entry->d_type) { | |
999 | case DT_DIR: | |
1000 | { | |
1001 | char output_subpath[PATH_MAX]; | |
1002 | char input_subpath[PATH_MAX]; | |
1003 | ||
1004 | strncpy(output_subpath, output_path, | |
1005 | sizeof(output_subpath)); | |
1006 | output_subpath[sizeof(output_subpath) - 1] = '\0'; | |
1007 | strncat(output_subpath, "/", | |
1008 | sizeof(output_subpath) - strlen(output_subpath) - 1); | |
1009 | strncat(output_subpath, entry->d_name, | |
1010 | sizeof(output_subpath) - strlen(output_subpath) - 1); | |
1011 | ||
1012 | ret = mkdir(output_subpath, S_IRWXU | S_IRWXG); | |
1013 | if (ret) { | |
1014 | PERROR("mkdir"); | |
1015 | has_warning = 1; | |
1016 | goto end; | |
1017 | } | |
1018 | ||
1019 | strncpy(input_subpath, input_path, | |
1020 | sizeof(input_subpath)); | |
1021 | input_subpath[sizeof(input_subpath) - 1] = '\0'; | |
1022 | strncat(input_subpath, "/", | |
1023 | sizeof(input_subpath) - strlen(input_subpath) - 1); | |
1024 | strncat(input_subpath, entry->d_name, | |
1025 | sizeof(input_subpath) - strlen(input_subpath) - 1); | |
1026 | ||
1027 | ret = extract_trace_recursive(output_subpath, | |
1028 | input_subpath); | |
29786dfa JG |
1029 | if (ret) { |
1030 | has_warning = 1; | |
1031 | } | |
a424227e MD |
1032 | break; |
1033 | } | |
1034 | case DT_REG: | |
93c4b583 | 1035 | case DT_LNK: |
a424227e MD |
1036 | if (!strcmp(entry->d_name, "metadata")) { |
1037 | ret = extract_one_trace(output_path, | |
1038 | input_path); | |
1039 | if (ret) { | |
1040 | WARN("Error extracting trace '%s', continuing anyway.", | |
1041 | input_path); | |
1042 | has_warning = 1; | |
1043 | } | |
1044 | } | |
1045 | /* Ignore other files */ | |
1046 | break; | |
1047 | default: | |
d7ba1388 | 1048 | has_warning = 1; |
a424227e | 1049 | goto end; |
d7ba1388 MD |
1050 | } |
1051 | } | |
a424227e MD |
1052 | end: |
1053 | closeret = closedir(dir); | |
1054 | if (closeret) { | |
1055 | PERROR("closedir"); | |
1056 | } | |
d7ba1388 MD |
1057 | return has_warning; |
1058 | } | |
1059 | ||
1060 | static | |
afe4fd7c | 1061 | int delete_dir_recursive(const char *path) |
d7ba1388 | 1062 | { |
afe4fd7c JR |
1063 | DIR *dir; |
1064 | int dir_fd, ret = 0, closeret; | |
d7ba1388 MD |
1065 | struct dirent *entry; |
1066 | ||
1067 | /* Open trace directory */ | |
afe4fd7c JR |
1068 | dir = opendir(path); |
1069 | if (!dir) { | |
1070 | PERROR("Cannot open '%s' path", path); | |
920a187e JG |
1071 | ret = -errno; |
1072 | goto end; | |
d7ba1388 | 1073 | } |
afe4fd7c JR |
1074 | dir_fd = dirfd(dir); |
1075 | if (dir_fd < 0) { | |
d7ba1388 | 1076 | PERROR("dirfd"); |
920a187e JG |
1077 | ret = -errno; |
1078 | goto end; | |
d7ba1388 MD |
1079 | } |
1080 | ||
afe4fd7c | 1081 | while ((entry = readdir(dir))) { |
d7ba1388 | 1082 | if (!strcmp(entry->d_name, ".") |
a424227e | 1083 | || !strcmp(entry->d_name, "..")) { |
d7ba1388 | 1084 | continue; |
a424227e | 1085 | } |
d7ba1388 MD |
1086 | switch (entry->d_type) { |
1087 | case DT_DIR: | |
afe4fd7c JR |
1088 | { |
1089 | char *subpath = zmalloc(PATH_MAX); | |
1090 | ||
1091 | if (!subpath) { | |
1092 | PERROR("zmalloc path"); | |
1093 | ret = -1; | |
1094 | goto end; | |
1095 | } | |
1096 | strncpy(subpath, path, PATH_MAX); | |
1097 | subpath[PATH_MAX - 1] = '\0'; | |
1098 | strncat(subpath, "/", | |
1099 | PATH_MAX - strlen(subpath) - 1); | |
1100 | strncat(subpath, entry->d_name, | |
1101 | PATH_MAX - strlen(subpath) - 1); | |
1102 | ||
1103 | ret = delete_dir_recursive(subpath); | |
1104 | free(subpath); | |
1105 | if (ret) { | |
1106 | /* Error occured, abort traversal. */ | |
1107 | goto end; | |
1108 | } | |
d7ba1388 | 1109 | break; |
afe4fd7c | 1110 | } |
d7ba1388 | 1111 | case DT_REG: |
afe4fd7c JR |
1112 | ret = unlinkat(dir_fd, entry->d_name, 0); |
1113 | if (ret) { | |
1114 | PERROR("Unlinking '%s'", entry->d_name); | |
1115 | goto end; | |
1116 | } | |
d7ba1388 MD |
1117 | break; |
1118 | default: | |
1119 | ret = -EINVAL; | |
1120 | goto end; | |
1121 | } | |
1122 | } | |
1123 | end: | |
afe4fd7c JR |
1124 | if (!ret) { |
1125 | ret = rmdir(path); | |
1126 | if (ret) { | |
1127 | PERROR("rmdir '%s'", path); | |
1128 | } | |
1129 | } | |
1130 | closeret = closedir(dir); | |
d7ba1388 MD |
1131 | if (closeret) { |
1132 | PERROR("closedir"); | |
1133 | } | |
d7ba1388 MD |
1134 | return ret; |
1135 | } | |
1136 | ||
d7ba1388 MD |
1137 | static |
1138 | int view_trace(const char *viewer_path, const char *trace_path) | |
1139 | { | |
1140 | pid_t pid; | |
1141 | ||
1142 | pid = fork(); | |
1143 | if (pid < 0) { | |
1144 | /* Error */ | |
1145 | PERROR("fork"); | |
1146 | return -1; | |
1147 | } else if (pid > 0) { | |
1148 | /* Parent */ | |
1149 | int status; | |
1150 | ||
1151 | pid = waitpid(pid, &status, 0); | |
1152 | if (pid < 0 || !WIFEXITED(status)) { | |
1153 | return -1; | |
1154 | } | |
1155 | } else { | |
1156 | /* Child */ | |
1157 | int ret; | |
1158 | ||
1159 | ret = execlp(viewer_path, viewer_path, | |
1160 | trace_path, (char *) NULL); | |
1161 | if (ret) { | |
1162 | PERROR("execlp"); | |
1163 | exit(EXIT_FAILURE); | |
1164 | } | |
1165 | exit(EXIT_SUCCESS); /* Never reached */ | |
1166 | } | |
1167 | return 0; | |
1168 | } | |
1169 | ||
1170 | /* | |
1171 | * main | |
1172 | */ | |
1173 | int main(int argc, char *argv[]) | |
1174 | { | |
aa25d686 JG |
1175 | int ret; |
1176 | bool has_warning = false; | |
d7ba1388 MD |
1177 | const char *output_path = NULL; |
1178 | char tmppath[] = "/tmp/lttng-crash-XXXXXX"; | |
1179 | ||
1180 | progname = argv[0] ? argv[0] : "lttng-crash"; | |
1181 | ||
1182 | ret = parse_args(argc, argv); | |
1183 | if (ret > 0) { | |
aa25d686 | 1184 | goto end; |
d7ba1388 | 1185 | } else if (ret < 0) { |
aa25d686 JG |
1186 | has_warning = true; |
1187 | goto end; | |
d7ba1388 MD |
1188 | } |
1189 | ||
1190 | if (opt_output_path) { | |
1191 | output_path = opt_output_path; | |
1192 | ret = mkdir(output_path, S_IRWXU | S_IRWXG); | |
1193 | if (ret) { | |
1194 | PERROR("mkdir"); | |
aa25d686 JG |
1195 | has_warning = true; |
1196 | goto end; | |
d7ba1388 MD |
1197 | } |
1198 | } else { | |
1199 | output_path = mkdtemp(tmppath); | |
1200 | if (!output_path) { | |
1201 | PERROR("mkdtemp"); | |
aa25d686 JG |
1202 | has_warning = true; |
1203 | goto end; | |
d7ba1388 MD |
1204 | } |
1205 | } | |
1206 | ||
a424227e | 1207 | ret = extract_trace_recursive(output_path, input_path); |
d7ba1388 | 1208 | if (ret < 0) { |
aa25d686 JG |
1209 | has_warning = true; |
1210 | goto end; | |
d7ba1388 | 1211 | } else if (ret > 0) { |
aa25d686 JG |
1212 | /* extract_trace_recursive reported a warning. */ |
1213 | has_warning = true; | |
d7ba1388 MD |
1214 | } |
1215 | if (!opt_output_path) { | |
1216 | /* View trace */ | |
1217 | ret = view_trace(opt_viewer_path, output_path); | |
aa25d686 JG |
1218 | if (ret) { |
1219 | has_warning = true; | |
1220 | } | |
d7ba1388 | 1221 | /* unlink temporary trace */ |
afe4fd7c | 1222 | ret = delete_dir_recursive(output_path); |
aa25d686 JG |
1223 | if (ret) { |
1224 | has_warning = true; | |
1225 | } | |
d7ba1388 | 1226 | } |
aa25d686 JG |
1227 | end: |
1228 | exit(has_warning ? EXIT_FAILURE : EXIT_SUCCESS); | |
d7ba1388 | 1229 | } |