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