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> | |
6ef14df5 | 40 | #include <common/utils.h> |
d7ba1388 MD |
41 | |
42 | #define DEFAULT_VIEWER "babeltrace" | |
43 | ||
44 | #define COPY_BUFLEN 4096 | |
45 | #define RB_CRASH_DUMP_ABI_LEN 32 | |
46 | ||
47 | #define RB_CRASH_DUMP_ABI_MAGIC_LEN 16 | |
48 | ||
49 | /* | |
50 | * The 128-bit magic number is xor'd in the process data so it does not | |
51 | * cause a false positive when searching for buffers by scanning memory. | |
52 | * The actual magic number is: | |
53 | * 0x17, 0x7B, 0xF1, 0x77, 0xBF, 0x17, 0x7B, 0xF1, | |
54 | * 0x77, 0xBF, 0x17, 0x7B, 0xF1, 0x77, 0xBF, 0x17, | |
55 | */ | |
56 | #define RB_CRASH_DUMP_ABI_MAGIC_XOR \ | |
57 | { \ | |
58 | 0x17 ^ 0xFF, 0x7B ^ 0xFF, 0xF1 ^ 0xFF, 0x77 ^ 0xFF, \ | |
59 | 0xBF ^ 0xFF, 0x17 ^ 0xFF, 0x7B ^ 0xFF, 0xF1 ^ 0xFF, \ | |
60 | 0x77 ^ 0xFF, 0xBF ^ 0xFF, 0x17 ^ 0xFF, 0x7B ^ 0xFF, \ | |
61 | 0xF1 ^ 0xFF, 0x77 ^ 0xFF, 0xBF ^ 0xFF, 0x17 ^ 0xFF, \ | |
62 | } | |
63 | ||
4fc83d94 PP |
64 | static const char *help_msg = |
65 | #ifdef LTTNG_EMBED_HELP | |
66 | #include <lttng-crash.1.h> | |
67 | #else | |
68 | NULL | |
69 | #endif | |
70 | ; | |
71 | ||
d7ba1388 MD |
72 | /* |
73 | * Non-static to ensure the compiler does not optimize away the xor. | |
74 | */ | |
75 | uint8_t lttng_crash_expected_magic_xor[] = RB_CRASH_DUMP_ABI_MAGIC_XOR; | |
76 | ||
77 | #define RB_CRASH_ENDIAN 0x1234 | |
78 | #define RB_CRASH_ENDIAN_REVERSE 0x3412 | |
79 | ||
80 | enum lttng_crash_type { | |
81 | LTTNG_CRASH_TYPE_UST = 0, | |
82 | LTTNG_CRASH_TYPE_KERNEL = 1, | |
83 | }; | |
84 | ||
85 | /* LTTng ring buffer defines (copied) */ | |
86 | ||
87 | #define HALF_ULONG_BITS(wl) (((wl) * CHAR_BIT) >> 1) | |
88 | ||
89 | #define SB_ID_OFFSET_SHIFT(wl) (HALF_ULONG_BITS(wl) + 1) | |
90 | #define SB_ID_OFFSET_COUNT(wl) (1UL << SB_ID_OFFSET_SHIFT(wl)) | |
91 | #define SB_ID_OFFSET_MASK(wl) (~(SB_ID_OFFSET_COUNT(wl) - 1)) | |
92 | /* | |
93 | * Lowest bit of top word half belongs to noref. Used only for overwrite mode. | |
94 | */ | |
95 | #define SB_ID_NOREF_SHIFT(wl) (SB_ID_OFFSET_SHIFT(wl) - 1) | |
96 | #define SB_ID_NOREF_COUNT(wl) (1UL << SB_ID_NOREF_SHIFT(wl)) | |
97 | #define SB_ID_NOREF_MASK(wl) SB_ID_NOREF_COUNT(wl) | |
98 | /* | |
99 | * In overwrite mode: lowest half of word is used for index. | |
100 | * Limit of 2^16 subbuffers per buffer on 32-bit, 2^32 on 64-bit. | |
101 | * In producer-consumer mode: whole word used for index. | |
102 | */ | |
103 | #define SB_ID_INDEX_SHIFT(wl) 0 | |
104 | #define SB_ID_INDEX_COUNT(wl) (1UL << SB_ID_INDEX_SHIFT(wl)) | |
105 | #define SB_ID_INDEX_MASK(wl) (SB_ID_NOREF_COUNT(wl) - 1) | |
106 | ||
107 | enum rb_modes { | |
108 | RING_BUFFER_OVERWRITE = 0, /* Overwrite when buffer full */ | |
109 | RING_BUFFER_DISCARD = 1, /* Discard when buffer full */ | |
110 | }; | |
111 | ||
112 | struct crash_abi_unknown { | |
113 | uint8_t magic[RB_CRASH_DUMP_ABI_MAGIC_LEN]; | |
8726a045 | 114 | uint64_t mmap_length; /* Overall length of crash record */ |
d7ba1388 MD |
115 | uint16_t endian; /* |
116 | * { 0x12, 0x34 }: big endian | |
117 | * { 0x34, 0x12 }: little endian | |
118 | */ | |
119 | uint16_t major; /* Major number. */ | |
120 | uint16_t minor; /* Minor number. */ | |
121 | uint8_t word_size; /* Word size (bytes). */ | |
122 | uint8_t layout_type; /* enum lttng_crash_layout */ | |
123 | } __attribute__((packed)); | |
124 | ||
125 | struct crash_abi_0_0 { | |
126 | struct crash_abi_unknown parent; | |
127 | ||
128 | struct { | |
129 | uint32_t prod_offset; | |
130 | uint32_t consumed_offset; | |
131 | uint32_t commit_hot_array; | |
132 | uint32_t commit_hot_seq; | |
133 | uint32_t buf_wsb_array; | |
134 | uint32_t buf_wsb_id; | |
135 | uint32_t sb_array; | |
136 | uint32_t sb_array_shmp_offset; | |
137 | uint32_t sb_backend_p_offset; | |
138 | uint32_t content_size; | |
139 | uint32_t packet_size; | |
140 | } __attribute__((packed)) offset; | |
141 | struct { | |
142 | uint8_t prod_offset; | |
143 | uint8_t consumed_offset; | |
144 | uint8_t commit_hot_seq; | |
145 | uint8_t buf_wsb_id; | |
146 | uint8_t sb_array_shmp_offset; | |
147 | uint8_t sb_backend_p_offset; | |
148 | uint8_t content_size; | |
149 | uint8_t packet_size; | |
150 | } __attribute__((packed)) length; | |
151 | struct { | |
152 | uint32_t commit_hot_array; | |
153 | uint32_t buf_wsb_array; | |
154 | uint32_t sb_array; | |
155 | } __attribute__((packed)) stride; | |
156 | ||
157 | uint64_t buf_size; /* Size of the buffer */ | |
158 | uint64_t subbuf_size; /* Sub-buffer size */ | |
159 | uint64_t num_subbuf; /* Number of sub-buffers for writer */ | |
160 | uint32_t mode; /* Buffer mode: 0: overwrite, 1: discard */ | |
161 | } __attribute__((packed)); | |
162 | ||
163 | struct lttng_crash_layout { | |
164 | struct { | |
165 | int prod_offset, consumed_offset, | |
166 | commit_hot_array, commit_hot_seq, | |
167 | buf_wsb_array, buf_wsb_id, | |
168 | sb_array, sb_array_shmp_offset, | |
169 | sb_backend_p_offset, content_size, | |
170 | packet_size; | |
171 | } offset; | |
172 | struct { | |
173 | int prod_offset, consumed_offset, | |
174 | commit_hot_seq, buf_wsb_id, | |
175 | sb_array_shmp_offset, sb_backend_p_offset, | |
176 | content_size, packet_size; | |
177 | } length; | |
178 | struct { | |
179 | int commit_hot_array, buf_wsb_array, sb_array; | |
180 | } stride; | |
181 | ||
182 | int reverse_byte_order; | |
183 | int word_size; | |
184 | ||
185 | uint64_t mmap_length; /* Length of crash record */ | |
186 | uint64_t buf_size; /* Size of the buffer */ | |
187 | uint64_t subbuf_size; /* Sub-buffer size */ | |
188 | uint64_t num_subbuf; /* Number of sub-buffers for writer */ | |
189 | uint32_t mode; /* Buffer mode: 0: overwrite, 1: discard */ | |
190 | }; | |
191 | ||
192 | /* Variables */ | |
193 | static char *progname, | |
9030e9a9 AB |
194 | *opt_viewer_path = NULL, |
195 | *opt_output_path = NULL; | |
d7ba1388 | 196 | |
a424227e | 197 | static char *input_path; |
d7ba1388 MD |
198 | |
199 | int lttng_opt_quiet, lttng_opt_verbose, lttng_opt_mi; | |
200 | ||
201 | enum { | |
202 | OPT_DUMP_OPTIONS, | |
203 | }; | |
204 | ||
205 | /* Getopt options. No first level command. */ | |
206 | static struct option long_options[] = { | |
207 | { "version", 0, NULL, 'V' }, | |
208 | { "help", 0, NULL, 'h' }, | |
209 | { "verbose", 0, NULL, 'v' }, | |
210 | { "viewer", 1, NULL, 'e' }, | |
211 | { "extract", 1, NULL, 'x' }, | |
212 | { "list-options", 0, NULL, OPT_DUMP_OPTIONS }, | |
213 | { NULL, 0, NULL, 0 }, | |
214 | }; | |
215 | ||
6ef14df5 | 216 | static void usage(void) |
d7ba1388 | 217 | { |
4fc83d94 | 218 | int ret = utils_show_help(1, "lttng-crash", help_msg); |
6ef14df5 PP |
219 | |
220 | if (ret) { | |
4fc83d94 | 221 | ERR("Cannot show --help for `lttng-crash`"); |
6ef14df5 PP |
222 | perror("exec"); |
223 | exit(EXIT_FAILURE); | |
224 | } | |
d7ba1388 MD |
225 | } |
226 | ||
227 | static void version(FILE *ofp) | |
228 | { | |
229 | fprintf(ofp, "%s (LTTng Crash Trace Viewer) " VERSION " - " VERSION_NAME | |
a3bc3918 | 230 | "%s%s\n", |
d7ba1388 | 231 | progname, |
a3bc3918 JR |
232 | GIT_VERSION[0] == '\0' ? "" : " - " GIT_VERSION, |
233 | EXTRA_VERSION_NAME[0] == '\0' ? "" : " - " EXTRA_VERSION_NAME); | |
d7ba1388 MD |
234 | } |
235 | ||
236 | /* | |
237 | * list_options | |
238 | * | |
239 | * List options line by line. This is mostly for bash auto completion and to | |
240 | * avoid difficult parsing. | |
241 | */ | |
242 | static void list_options(FILE *ofp) | |
243 | { | |
244 | int i = 0; | |
245 | struct option *option = NULL; | |
246 | ||
247 | option = &long_options[i]; | |
248 | while (option->name != NULL) { | |
249 | fprintf(ofp, "--%s\n", option->name); | |
250 | ||
251 | if (isprint(option->val)) { | |
252 | fprintf(ofp, "-%c\n", option->val); | |
253 | } | |
254 | ||
255 | i++; | |
256 | option = &long_options[i]; | |
257 | } | |
258 | } | |
259 | ||
260 | /* | |
261 | * Parse command line arguments. | |
262 | * | |
263 | * Return 0 if OK, else -1 | |
264 | */ | |
265 | static int parse_args(int argc, char **argv) | |
266 | { | |
267 | int opt, ret = 0; | |
268 | ||
269 | if (argc < 2) { | |
6ef14df5 | 270 | usage(); |
d7ba1388 MD |
271 | exit(EXIT_FAILURE); |
272 | } | |
273 | ||
d07f3d99 | 274 | while ((opt = getopt_long(argc, argv, "+Vhve:x:", long_options, NULL)) != -1) { |
d7ba1388 MD |
275 | switch (opt) { |
276 | case 'V': | |
277 | version(stdout); | |
278 | ret = 1; | |
279 | goto end; | |
280 | case 'h': | |
6ef14df5 | 281 | usage(); |
d7ba1388 MD |
282 | ret = 1; |
283 | goto end; | |
284 | case 'v': | |
285 | /* There is only 3 possible level of verbosity. (-vvv) */ | |
286 | if (lttng_opt_verbose < 3) { | |
287 | lttng_opt_verbose += 1; | |
288 | } | |
289 | break; | |
290 | case 'e': | |
9030e9a9 | 291 | free(opt_viewer_path); |
d7ba1388 MD |
292 | opt_viewer_path = strdup(optarg); |
293 | break; | |
294 | case 'x': | |
9030e9a9 | 295 | free(opt_output_path); |
d7ba1388 MD |
296 | opt_output_path = strdup(optarg); |
297 | break; | |
298 | case OPT_DUMP_OPTIONS: | |
299 | list_options(stdout); | |
300 | ret = 1; | |
301 | goto end; | |
302 | default: | |
6ef14df5 | 303 | ERR("Unknown command-line option"); |
d7ba1388 MD |
304 | goto error; |
305 | } | |
306 | } | |
307 | ||
9030e9a9 AB |
308 | if (!opt_viewer_path) { |
309 | opt_viewer_path = DEFAULT_VIEWER; | |
310 | } | |
311 | ||
a424227e | 312 | /* No leftovers, or more than one input path, print usage and quit */ |
6ef14df5 PP |
313 | if (argc - optind != 1) { |
314 | ERR("Command-line error: Specify exactly one input path"); | |
d7ba1388 MD |
315 | goto error; |
316 | } | |
317 | ||
a424227e | 318 | input_path = argv[optind]; |
d7ba1388 MD |
319 | end: |
320 | return ret; | |
321 | ||
322 | error: | |
323 | return -1; | |
324 | } | |
325 | ||
326 | static | |
327 | int copy_file(const char *file_dest, const char *file_src) | |
328 | { | |
8726a045 | 329 | int fd_src = -1, fd_dest = -1; |
d7ba1388 MD |
330 | ssize_t readlen, writelen; |
331 | char buf[COPY_BUFLEN]; | |
8726a045 | 332 | int ret; |
d7ba1388 MD |
333 | |
334 | DBG("Copy metadata file '%s' into '%s'", file_src, file_dest); | |
335 | ||
336 | fd_src = open(file_src, O_RDONLY); | |
337 | if (fd_src < 0) { | |
338 | PERROR("Error opening %s for reading", file_src); | |
8726a045 JR |
339 | ret = -errno; |
340 | goto error; | |
d7ba1388 MD |
341 | } |
342 | fd_dest = open(file_dest, O_RDWR | O_CREAT | O_EXCL, | |
343 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
344 | if (fd_dest < 0) { | |
345 | PERROR("Error opening %s for writing", file_dest); | |
8726a045 JR |
346 | ret = -errno; |
347 | goto error; | |
d7ba1388 MD |
348 | } |
349 | ||
350 | for (;;) { | |
351 | readlen = lttng_read(fd_src, buf, COPY_BUFLEN); | |
352 | if (readlen < 0) { | |
353 | PERROR("Error reading input file"); | |
8726a045 JR |
354 | ret = -1; |
355 | goto error; | |
d7ba1388 MD |
356 | } |
357 | if (!readlen) { | |
358 | break; | |
359 | } | |
360 | writelen = lttng_write(fd_dest, buf, readlen); | |
361 | if (writelen < readlen) { | |
362 | PERROR("Error writing to output file"); | |
8726a045 JR |
363 | ret = -1; |
364 | goto error; | |
365 | } | |
366 | } | |
367 | ||
368 | ret = 0; | |
369 | error: | |
370 | if (fd_src >= 0) { | |
371 | if (close(fd_src) < 0) { | |
372 | PERROR("Error closing %s", file_src); | |
373 | } | |
374 | } | |
375 | ||
376 | if (fd_dest >= 0) { | |
377 | if (close(fd_dest) < 0) { | |
378 | PERROR("Error closing %s", file_dest); | |
d7ba1388 MD |
379 | } |
380 | } | |
8726a045 | 381 | return ret; |
d7ba1388 MD |
382 | } |
383 | ||
384 | static | |
385 | uint64_t _crash_get_field(const struct lttng_crash_layout *layout, | |
386 | const char *ptr, size_t size) | |
387 | { | |
388 | switch (size) { | |
389 | case 1: return *(uint8_t *) ptr; | |
390 | case 2: if (layout->reverse_byte_order) { | |
391 | return __bswap_16(*(uint16_t *) ptr); | |
392 | } else { | |
393 | return *(uint16_t *) ptr; | |
394 | ||
395 | } | |
396 | case 4: if (layout->reverse_byte_order) { | |
397 | return __bswap_32(*(uint32_t *) ptr); | |
398 | } else { | |
399 | return *(uint32_t *) ptr; | |
400 | ||
401 | } | |
402 | case 8: if (layout->reverse_byte_order) { | |
403 | return __bswap_64(*(uint64_t *) ptr); | |
404 | } else { | |
405 | return *(uint64_t *) ptr; | |
406 | } | |
407 | default: | |
408 | abort(); | |
409 | return -1; | |
410 | } | |
411 | ||
412 | } | |
413 | ||
414 | #define crash_get_field(layout, map, name) \ | |
415 | _crash_get_field(layout, (map) + (layout)->offset.name, \ | |
416 | layout->length.name) | |
417 | ||
418 | #define crash_get_array_field(layout, map, array_name, idx, field_name) \ | |
419 | _crash_get_field(layout, \ | |
420 | (map) + (layout)->offset.array_name \ | |
421 | + (idx * (layout)->stride.array_name) \ | |
422 | + (layout)->offset.field_name, \ | |
423 | (layout)->length.field_name) | |
424 | ||
425 | #define crash_get_hdr_raw_field(layout, hdr, name) ((hdr)->name) | |
426 | ||
427 | #define crash_get_hdr_field(layout, hdr, name) \ | |
428 | _crash_get_field(layout, (const char *) &(hdr)->name, \ | |
429 | sizeof((hdr)->name)) | |
430 | ||
431 | #define crash_get_layout(layout, hdr, name) \ | |
432 | do { \ | |
433 | (layout)->name = crash_get_hdr_field(layout, hdr, \ | |
434 | name); \ | |
435 | DBG("layout.%s = %" PRIu64, #name, \ | |
436 | (uint64_t) (layout)->name); \ | |
437 | } while (0) | |
438 | ||
439 | static | |
440 | int get_crash_layout_0_0(struct lttng_crash_layout *layout, | |
441 | char *map) | |
442 | { | |
443 | const struct crash_abi_0_0 *abi = (const struct crash_abi_0_0 *) map; | |
444 | ||
445 | crash_get_layout(layout, abi, offset.prod_offset); | |
446 | crash_get_layout(layout, abi, offset.consumed_offset); | |
447 | crash_get_layout(layout, abi, offset.commit_hot_array); | |
448 | crash_get_layout(layout, abi, offset.commit_hot_seq); | |
449 | crash_get_layout(layout, abi, offset.buf_wsb_array); | |
450 | crash_get_layout(layout, abi, offset.buf_wsb_id); | |
451 | crash_get_layout(layout, abi, offset.sb_array); | |
452 | crash_get_layout(layout, abi, offset.sb_array_shmp_offset); | |
453 | crash_get_layout(layout, abi, offset.sb_backend_p_offset); | |
454 | crash_get_layout(layout, abi, offset.content_size); | |
455 | crash_get_layout(layout, abi, offset.packet_size); | |
456 | ||
457 | crash_get_layout(layout, abi, length.prod_offset); | |
458 | crash_get_layout(layout, abi, length.consumed_offset); | |
459 | crash_get_layout(layout, abi, length.commit_hot_seq); | |
460 | crash_get_layout(layout, abi, length.buf_wsb_id); | |
461 | crash_get_layout(layout, abi, length.sb_array_shmp_offset); | |
462 | crash_get_layout(layout, abi, length.sb_backend_p_offset); | |
463 | crash_get_layout(layout, abi, length.content_size); | |
464 | crash_get_layout(layout, abi, length.packet_size); | |
465 | ||
466 | crash_get_layout(layout, abi, stride.commit_hot_array); | |
467 | crash_get_layout(layout, abi, stride.buf_wsb_array); | |
468 | crash_get_layout(layout, abi, stride.sb_array); | |
469 | ||
470 | crash_get_layout(layout, abi, buf_size); | |
471 | crash_get_layout(layout, abi, subbuf_size); | |
472 | crash_get_layout(layout, abi, num_subbuf); | |
473 | crash_get_layout(layout, abi, mode); | |
474 | ||
475 | return 0; | |
476 | } | |
477 | ||
478 | static | |
479 | void print_dbg_magic(const uint8_t *magic) | |
480 | { | |
481 | DBG("magic: 0x%X%X%X%X%X%X%X%X%X%X%X%X%X%X%X%X", | |
482 | magic[0], magic[1], magic[2], magic[3], | |
483 | magic[4], magic[5], magic[6], magic[7], | |
484 | magic[8], magic[9], magic[10], magic[11], | |
485 | magic[12], magic[13], magic[14], magic[15]); | |
486 | } | |
487 | ||
488 | static | |
489 | int check_magic(const uint8_t *magic) | |
490 | { | |
491 | int i; | |
492 | ||
493 | for (i = 0; i < RB_CRASH_DUMP_ABI_MAGIC_LEN; i++) { | |
494 | if ((magic[i] ^ 0xFF) != lttng_crash_expected_magic_xor[i]) { | |
495 | return -1; | |
496 | } | |
497 | } | |
498 | return 0; | |
499 | } | |
500 | ||
501 | static | |
e6c6e235 MD |
502 | int get_crash_layout(struct lttng_crash_layout *layout, int fd, |
503 | const char *input_file) | |
d7ba1388 MD |
504 | { |
505 | char *map; | |
506 | int ret = 0, unmapret; | |
507 | const uint8_t *magic; | |
508 | uint64_t mmap_length; | |
509 | uint16_t major, minor; | |
510 | uint8_t word_size; | |
511 | const struct crash_abi_unknown *abi; | |
512 | uint16_t endian; | |
513 | enum lttng_crash_type layout_type; | |
e6c6e235 | 514 | struct stat stat; |
d7ba1388 | 515 | |
e6c6e235 MD |
516 | ret = fstat(fd, &stat); |
517 | if (ret < 0) { | |
518 | PERROR("Failed to fstat '%s'", input_file); | |
519 | return -1; | |
520 | } | |
521 | if (stat.st_size < RB_CRASH_DUMP_ABI_LEN) { | |
522 | ERR("File '%s' truncated: file length of %" PRIi64 | |
523 | " bytes does not meet the minimal expected " | |
524 | "length of %d bytes", | |
525 | input_file, (int64_t) stat.st_size, | |
526 | RB_CRASH_DUMP_ABI_LEN); | |
527 | return -1; | |
528 | } | |
d7ba1388 MD |
529 | map = mmap(NULL, RB_CRASH_DUMP_ABI_LEN, PROT_READ, MAP_PRIVATE, |
530 | fd, 0); | |
531 | if (map == MAP_FAILED) { | |
532 | PERROR("Mapping file"); | |
533 | return -1; | |
534 | } | |
535 | abi = (const struct crash_abi_unknown *) map; | |
536 | magic = crash_get_hdr_raw_field(layout, abi, magic); | |
537 | print_dbg_magic(magic); | |
538 | if (check_magic(magic)) { | |
539 | DBG("Unknown magic number"); | |
540 | ret = 1; /* positive return value, skip */ | |
541 | goto end; | |
542 | } | |
543 | endian = crash_get_hdr_field(layout, abi, endian); | |
544 | switch (endian) { | |
545 | case RB_CRASH_ENDIAN: | |
546 | break; | |
547 | case RB_CRASH_ENDIAN_REVERSE: | |
548 | layout->reverse_byte_order = 1; | |
549 | break; | |
550 | default: | |
551 | DBG("Unknown endianness value: 0x%X", (unsigned int) endian); | |
552 | ret = 1; /* positive return value, skip */ | |
553 | goto end; | |
554 | } | |
555 | layout_type = (enum lttng_crash_type) crash_get_hdr_field(layout, abi, layout_type); | |
556 | switch (layout_type) { | |
557 | case LTTNG_CRASH_TYPE_UST: | |
558 | break; | |
559 | case LTTNG_CRASH_TYPE_KERNEL: | |
560 | ERR("lttng-modules buffer layout support not implemented"); | |
561 | ret = 1; /* positive return value, skip */ | |
562 | goto end; | |
563 | default: | |
564 | ERR("Unknown layout type %u", (unsigned int) layout_type); | |
565 | ret = 1; /* positive return value, skip */ | |
566 | goto end; | |
567 | } | |
568 | mmap_length = crash_get_hdr_field(layout, abi, mmap_length); | |
569 | DBG("mmap_length: %" PRIu64, mmap_length); | |
570 | layout->mmap_length = mmap_length; | |
571 | major = crash_get_hdr_field(layout, abi, major); | |
572 | DBG("major: %u", major); | |
573 | minor = crash_get_hdr_field(layout, abi, minor); | |
574 | DBG("minor: %u", minor); | |
575 | word_size = crash_get_hdr_field(layout, abi, word_size); | |
576 | DBG("word_size: %u", word_size); | |
577 | switch (major) { | |
578 | case 0: | |
579 | switch (minor) { | |
580 | case 0: | |
581 | ret = get_crash_layout_0_0(layout, map); | |
582 | if (ret) | |
583 | goto end; | |
584 | break; | |
585 | default: | |
586 | ret = -1; | |
587 | ERR("Unsupported crash ABI %u.%u\n", major, minor); | |
588 | goto end; | |
589 | } | |
590 | break; | |
591 | default: | |
592 | ERR("Unsupported crash ABI %u.%u\n", major, minor); | |
593 | ret = -1; | |
594 | goto end; | |
595 | } | |
596 | layout->word_size = word_size; | |
597 | end: | |
598 | unmapret = munmap(map, RB_CRASH_DUMP_ABI_LEN); | |
599 | if (unmapret) { | |
600 | PERROR("munmap"); | |
601 | } | |
602 | return ret; | |
603 | } | |
604 | ||
605 | /* buf_trunc mask selects only the buffer number. */ | |
606 | static inline | |
607 | uint64_t buf_trunc(uint64_t offset, uint64_t buf_size) | |
608 | { | |
609 | return offset & ~(buf_size - 1); | |
610 | } | |
611 | ||
612 | /* subbuf_trunc mask selects the subbuffer number. */ | |
613 | static inline | |
614 | uint64_t subbuf_trunc(uint64_t offset, uint64_t subbuf_size) | |
615 | { | |
616 | return offset & ~(subbuf_size - 1); | |
617 | } | |
618 | ||
619 | /* buf_offset mask selects only the offset within the current buffer. */ | |
620 | static inline | |
621 | uint64_t buf_offset(uint64_t offset, uint64_t buf_size) | |
622 | { | |
623 | return offset & (buf_size - 1); | |
624 | } | |
625 | ||
626 | /* subbuf_offset mask selects the offset within the current subbuffer. */ | |
627 | static inline | |
628 | uint64_t subbuf_offset(uint64_t offset, uint64_t subbuf_size) | |
629 | { | |
630 | return offset & (subbuf_size - 1); | |
631 | } | |
632 | ||
633 | /* subbuf_index returns the index of the current subbuffer within the buffer. */ | |
634 | static inline | |
635 | uint64_t subbuf_index(uint64_t offset, uint64_t buf_size, uint64_t subbuf_size) | |
636 | { | |
637 | return buf_offset(offset, buf_size) / subbuf_size; | |
638 | } | |
639 | ||
640 | static inline | |
641 | uint64_t subbuffer_id_get_index(uint32_t mode, uint64_t id, | |
642 | unsigned int wl) | |
643 | { | |
644 | if (mode == RING_BUFFER_OVERWRITE) | |
645 | return id & SB_ID_INDEX_MASK(wl); | |
646 | else | |
647 | return id; | |
648 | } | |
649 | ||
650 | static | |
651 | int copy_crash_subbuf(const struct lttng_crash_layout *layout, | |
652 | int fd_dest, char *buf, uint64_t offset) | |
653 | { | |
654 | uint64_t buf_size, subbuf_size, num_subbuf, sbidx, id, | |
655 | sb_bindex, rpages_offset, p_offset, seq_cc, | |
656 | committed, commit_count_mask, consumed_cur, | |
657 | packet_size; | |
658 | char *subbuf_ptr; | |
659 | ssize_t writelen; | |
660 | ||
661 | /* | |
662 | * Get the current subbuffer by applying the proper mask to | |
663 | * "offset", and looking up the subbuf location within the | |
664 | * source file buf. | |
665 | */ | |
666 | ||
667 | buf_size = layout->buf_size; | |
668 | subbuf_size = layout->subbuf_size; | |
669 | num_subbuf = layout->num_subbuf; | |
670 | ||
671 | switch (layout->word_size) { | |
672 | case 4: commit_count_mask = 0xFFFFFFFFULL / num_subbuf; | |
673 | break; | |
674 | case 8: commit_count_mask = 0xFFFFFFFFFFFFFFFFULL / num_subbuf; | |
675 | break; | |
676 | default: | |
677 | ERR("Unsupported word size: %u", | |
678 | (unsigned int) layout->word_size); | |
679 | return -EINVAL; | |
680 | } | |
681 | ||
5f98d630 | 682 | DBG("Copy crash subbuffer at offset %" PRIu64, offset); |
d7ba1388 MD |
683 | sbidx = subbuf_index(offset, buf_size, subbuf_size); |
684 | ||
685 | /* | |
686 | * Find where the seq cc is located. Compute length of data to | |
687 | * copy. | |
688 | */ | |
689 | seq_cc = crash_get_array_field(layout, buf, commit_hot_array, | |
690 | sbidx, commit_hot_seq); | |
691 | consumed_cur = crash_get_field(layout, buf, consumed_offset); | |
692 | ||
693 | /* | |
694 | * Check that the buffer we are getting is after or at | |
695 | * consumed_cur position. | |
696 | */ | |
697 | if ((long) subbuf_trunc(offset, subbuf_size) | |
698 | - (long) subbuf_trunc(consumed_cur, subbuf_size) < 0) { | |
699 | DBG("No data: position is before consumed_cur"); | |
700 | goto nodata; | |
701 | } | |
702 | ||
703 | /* | |
704 | * Check if subbuffer has been fully committed. | |
705 | */ | |
706 | if (((seq_cc - subbuf_size) & commit_count_mask) | |
707 | - (buf_trunc(offset, buf_size) / num_subbuf) | |
708 | == 0) { | |
709 | committed = subbuf_size; | |
710 | } else { | |
711 | committed = subbuf_offset(seq_cc, subbuf_size); | |
712 | if (!committed) { | |
713 | DBG("No data committed, seq_cc: %" PRIu64, seq_cc); | |
714 | goto nodata; | |
715 | } | |
716 | } | |
717 | ||
718 | /* Find actual physical offset in subbuffer table */ | |
719 | id = crash_get_array_field(layout, buf, buf_wsb_array, | |
720 | sbidx, buf_wsb_id); | |
721 | sb_bindex = subbuffer_id_get_index(layout->mode, id, | |
722 | layout->word_size); | |
723 | rpages_offset = crash_get_array_field(layout, buf, sb_array, | |
724 | sb_bindex, sb_array_shmp_offset); | |
725 | p_offset = crash_get_field(layout, buf + rpages_offset, | |
726 | sb_backend_p_offset); | |
727 | subbuf_ptr = buf + p_offset; | |
728 | ||
729 | if (committed == subbuf_size) { | |
730 | /* | |
731 | * Packet header can be used. | |
732 | */ | |
733 | if (layout->length.packet_size) { | |
734 | memcpy(&packet_size, | |
735 | subbuf_ptr + layout->offset.packet_size, | |
736 | layout->length.packet_size); | |
737 | if (layout->reverse_byte_order) { | |
738 | packet_size = __bswap_64(packet_size); | |
739 | } | |
740 | packet_size /= CHAR_BIT; | |
741 | } else { | |
742 | packet_size = subbuf_size; | |
743 | } | |
744 | } else { | |
745 | uint64_t patch_size; | |
746 | ||
747 | /* | |
748 | * Find where to patch the sub-buffer header with actual | |
749 | * readable data len and packet len, derived from seq | |
750 | * cc. Patch it in our in-memory copy. | |
751 | */ | |
752 | patch_size = committed * CHAR_BIT; | |
753 | if (layout->reverse_byte_order) { | |
754 | patch_size = __bswap_64(patch_size); | |
755 | } | |
756 | if (layout->length.content_size) { | |
757 | memcpy(subbuf_ptr + layout->offset.content_size, | |
758 | &patch_size, layout->length.content_size); | |
759 | } | |
760 | if (layout->length.packet_size) { | |
761 | memcpy(subbuf_ptr + layout->offset.packet_size, | |
762 | &patch_size, layout->length.packet_size); | |
763 | } | |
764 | packet_size = committed; | |
765 | } | |
766 | ||
767 | /* | |
768 | * Copy packet into fd_dest. | |
769 | */ | |
770 | writelen = lttng_write(fd_dest, subbuf_ptr, packet_size); | |
771 | if (writelen < packet_size) { | |
772 | PERROR("Error writing to output file"); | |
773 | return -1; | |
774 | } | |
775 | DBG("Copied %" PRIu64 " bytes of data", packet_size); | |
776 | return 0; | |
777 | ||
778 | nodata: | |
779 | return -ENODATA; | |
780 | } | |
781 | ||
782 | static | |
783 | int copy_crash_data(const struct lttng_crash_layout *layout, int fd_dest, | |
784 | int fd_src) | |
785 | { | |
786 | char *buf; | |
787 | int ret = 0, has_data = 0; | |
788 | struct stat statbuf; | |
789 | size_t src_file_len; | |
790 | uint64_t prod_offset, consumed_offset; | |
791 | uint64_t offset, subbuf_size; | |
792 | ssize_t readlen; | |
793 | ||
794 | ret = fstat(fd_src, &statbuf); | |
795 | if (ret) { | |
796 | return ret; | |
797 | } | |
798 | src_file_len = layout->mmap_length; | |
799 | buf = zmalloc(src_file_len); | |
800 | if (!buf) { | |
801 | return -1; | |
802 | } | |
803 | readlen = lttng_read(fd_src, buf, src_file_len); | |
804 | if (readlen < 0) { | |
805 | PERROR("Error reading input file"); | |
309fc9bf MD |
806 | ret = -1; |
807 | goto end; | |
d7ba1388 MD |
808 | } |
809 | ||
810 | prod_offset = crash_get_field(layout, buf, prod_offset); | |
811 | DBG("prod_offset: 0x%" PRIx64, prod_offset); | |
812 | consumed_offset = crash_get_field(layout, buf, consumed_offset); | |
813 | DBG("consumed_offset: 0x%" PRIx64, consumed_offset); | |
814 | subbuf_size = layout->subbuf_size; | |
815 | ||
816 | for (offset = consumed_offset; offset < prod_offset; | |
817 | offset += subbuf_size) { | |
818 | ret = copy_crash_subbuf(layout, fd_dest, buf, offset); | |
819 | if (!ret) { | |
820 | has_data = 1; | |
821 | } | |
822 | if (ret) { | |
823 | goto end; | |
824 | } | |
825 | } | |
826 | end: | |
827 | free(buf); | |
828 | if (ret && ret != -ENODATA) { | |
829 | return ret; | |
830 | } | |
831 | if (has_data) { | |
832 | return 0; | |
833 | } else { | |
834 | return -ENODATA; | |
835 | } | |
836 | } | |
837 | ||
838 | static | |
839 | int extract_file(int output_dir_fd, const char *output_file, | |
840 | int input_dir_fd, const char *input_file) | |
841 | { | |
842 | int fd_dest, fd_src, ret = 0, closeret; | |
843 | struct lttng_crash_layout layout; | |
844 | ||
845 | layout.reverse_byte_order = 0; /* For reading magic number */ | |
846 | ||
847 | DBG("Extract file '%s'", input_file); | |
848 | fd_src = openat(input_dir_fd, input_file, O_RDONLY); | |
849 | if (fd_src < 0) { | |
850 | PERROR("Error opening '%s' for reading", | |
851 | input_file); | |
852 | ret = -1; | |
853 | goto end; | |
854 | } | |
855 | ||
856 | /* Query the crash ABI layout */ | |
e6c6e235 | 857 | ret = get_crash_layout(&layout, fd_src, input_file); |
d7ba1388 MD |
858 | if (ret) { |
859 | goto close_src; | |
860 | } | |
861 | ||
862 | fd_dest = openat(output_dir_fd, output_file, | |
863 | O_RDWR | O_CREAT | O_EXCL, | |
864 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
865 | if (fd_dest < 0) { | |
866 | PERROR("Error opening '%s' for writing", | |
867 | output_file); | |
868 | ret = -1; | |
869 | goto close_src; | |
870 | } | |
871 | ||
872 | ret = copy_crash_data(&layout, fd_dest, fd_src); | |
873 | if (ret) { | |
874 | goto close_dest; | |
875 | } | |
876 | ||
877 | close_dest: | |
878 | closeret = close(fd_dest); | |
879 | if (closeret) { | |
880 | PERROR("close"); | |
881 | } | |
882 | if (ret == -ENODATA) { | |
883 | closeret = unlinkat(output_dir_fd, output_file, 0); | |
884 | if (closeret) { | |
885 | PERROR("unlinkat"); | |
886 | } | |
887 | } | |
888 | close_src: | |
889 | closeret = close(fd_src); | |
890 | if (closeret) { | |
891 | PERROR("close"); | |
892 | } | |
893 | end: | |
894 | return ret; | |
895 | } | |
896 | ||
897 | static | |
898 | int extract_all_files(const char *output_path, | |
899 | const char *input_path) | |
900 | { | |
901 | DIR *input_dir, *output_dir; | |
902 | int input_dir_fd, output_dir_fd, ret = 0, closeret; | |
903 | struct dirent *entry; /* input */ | |
904 | ||
905 | /* Open input directory */ | |
906 | input_dir = opendir(input_path); | |
907 | if (!input_dir) { | |
908 | PERROR("Cannot open '%s' path", input_path); | |
909 | return -1; | |
910 | } | |
911 | input_dir_fd = dirfd(input_dir); | |
912 | if (input_dir_fd < 0) { | |
913 | PERROR("dirfd"); | |
914 | return -1; | |
915 | } | |
916 | ||
917 | /* Open output directory */ | |
918 | output_dir = opendir(output_path); | |
919 | if (!output_dir) { | |
920 | PERROR("Cannot open '%s' path", output_path); | |
921 | return -1; | |
922 | } | |
923 | output_dir_fd = dirfd(output_dir); | |
924 | if (output_dir_fd < 0) { | |
925 | PERROR("dirfd"); | |
926 | return -1; | |
927 | } | |
928 | ||
929 | while ((entry = readdir(input_dir))) { | |
930 | if (!strcmp(entry->d_name, ".") | |
931 | || !strcmp(entry->d_name, "..")) | |
932 | continue; | |
933 | ret = extract_file(output_dir_fd, entry->d_name, | |
934 | input_dir_fd, entry->d_name); | |
935 | if (ret == -ENODATA) { | |
936 | DBG("No data in file '%s', skipping", entry->d_name); | |
937 | ret = 0; | |
938 | continue; | |
939 | } else if (ret < 0) { | |
940 | break; | |
941 | } else if (ret > 0) { | |
942 | DBG("Skipping file '%s'", entry->d_name); | |
943 | ret = 0; | |
944 | continue; | |
945 | } | |
946 | } | |
947 | closeret = closedir(output_dir); | |
948 | if (closeret) { | |
949 | PERROR("closedir"); | |
950 | } | |
951 | closeret = closedir(input_dir); | |
952 | if (closeret) { | |
953 | PERROR("closedir"); | |
954 | } | |
955 | return ret; | |
956 | } | |
957 | ||
958 | static | |
959 | int extract_one_trace(const char *output_path, | |
960 | const char *input_path) | |
961 | { | |
962 | char dest[PATH_MAX], src[PATH_MAX]; | |
963 | int ret; | |
964 | ||
965 | DBG("Extract crash trace '%s' into '%s'", input_path, output_path); | |
966 | ||
967 | /* Copy metadata */ | |
968 | strncpy(dest, output_path, PATH_MAX); | |
969 | dest[PATH_MAX - 1] = '\0'; | |
970 | strncat(dest, "/metadata", PATH_MAX - strlen(dest) - 1); | |
971 | ||
972 | strncpy(src, input_path, PATH_MAX); | |
973 | src[PATH_MAX - 1] = '\0'; | |
974 | strncat(src, "/metadata", PATH_MAX - strlen(dest) - 1); | |
975 | ||
976 | ret = copy_file(dest, src); | |
977 | if (ret) { | |
978 | return ret; | |
979 | } | |
980 | ||
981 | /* Extract each other file that has expected header */ | |
982 | return extract_all_files(output_path, input_path); | |
983 | } | |
984 | ||
985 | static | |
a424227e MD |
986 | int extract_trace_recursive(const char *output_path, |
987 | const char *input_path) | |
d7ba1388 | 988 | { |
a424227e MD |
989 | DIR *dir; |
990 | int dir_fd, ret = 0, closeret; | |
991 | struct dirent *entry; | |
88ae485a | 992 | size_t path_len; |
d7ba1388 MD |
993 | int has_warning = 0; |
994 | ||
a424227e MD |
995 | /* Open directory */ |
996 | dir = opendir(input_path); | |
997 | if (!dir) { | |
998 | PERROR("Cannot open '%s' path", input_path); | |
999 | return -1; | |
1000 | } | |
88ae485a JR |
1001 | |
1002 | path_len = strlen(input_path); | |
1003 | ||
a424227e MD |
1004 | dir_fd = dirfd(dir); |
1005 | if (dir_fd < 0) { | |
1006 | PERROR("dirfd"); | |
d7ba1388 MD |
1007 | return -1; |
1008 | } | |
1009 | ||
a424227e | 1010 | while ((entry = readdir(dir))) { |
88ae485a JR |
1011 | struct stat st; |
1012 | size_t name_len; | |
1013 | char filename[PATH_MAX]; | |
1014 | ||
a424227e MD |
1015 | if (!strcmp(entry->d_name, ".") |
1016 | || !strcmp(entry->d_name, "..")) { | |
1017 | continue; | |
1018 | } | |
88ae485a JR |
1019 | |
1020 | name_len = strlen(entry->d_name); | |
1021 | if (path_len + name_len + 2 > sizeof(filename)) { | |
1022 | ERR("Failed to remove file: path name too long (%s/%s)", | |
1023 | input_path, entry->d_name); | |
1024 | continue; | |
1025 | } | |
1026 | ||
1027 | if (snprintf(filename, sizeof(filename), "%s/%s", | |
1028 | input_path, entry->d_name) < 0) { | |
1029 | ERR("Failed to format path."); | |
1030 | continue; | |
1031 | } | |
1032 | ||
1033 | if (stat(filename, &st)) { | |
1034 | PERROR("stat"); | |
1035 | continue; | |
1036 | } | |
1037 | ||
1038 | if (S_ISDIR(st.st_mode)) { | |
a424227e MD |
1039 | char output_subpath[PATH_MAX]; |
1040 | char input_subpath[PATH_MAX]; | |
1041 | ||
1042 | strncpy(output_subpath, output_path, | |
1043 | sizeof(output_subpath)); | |
1044 | output_subpath[sizeof(output_subpath) - 1] = '\0'; | |
1045 | strncat(output_subpath, "/", | |
1046 | sizeof(output_subpath) - strlen(output_subpath) - 1); | |
1047 | strncat(output_subpath, entry->d_name, | |
1048 | sizeof(output_subpath) - strlen(output_subpath) - 1); | |
1049 | ||
1050 | ret = mkdir(output_subpath, S_IRWXU | S_IRWXG); | |
1051 | if (ret) { | |
1052 | PERROR("mkdir"); | |
1053 | has_warning = 1; | |
1054 | goto end; | |
1055 | } | |
1056 | ||
1057 | strncpy(input_subpath, input_path, | |
1058 | sizeof(input_subpath)); | |
1059 | input_subpath[sizeof(input_subpath) - 1] = '\0'; | |
1060 | strncat(input_subpath, "/", | |
1061 | sizeof(input_subpath) - strlen(input_subpath) - 1); | |
1062 | strncat(input_subpath, entry->d_name, | |
1063 | sizeof(input_subpath) - strlen(input_subpath) - 1); | |
1064 | ||
1065 | ret = extract_trace_recursive(output_subpath, | |
1066 | input_subpath); | |
29786dfa JG |
1067 | if (ret) { |
1068 | has_warning = 1; | |
1069 | } | |
88ae485a | 1070 | } else if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode)) { |
a424227e MD |
1071 | if (!strcmp(entry->d_name, "metadata")) { |
1072 | ret = extract_one_trace(output_path, | |
1073 | input_path); | |
1074 | if (ret) { | |
1075 | WARN("Error extracting trace '%s', continuing anyway.", | |
1076 | input_path); | |
1077 | has_warning = 1; | |
1078 | } | |
1079 | } | |
88ae485a | 1080 | } else { |
d7ba1388 | 1081 | has_warning = 1; |
a424227e | 1082 | goto end; |
d7ba1388 MD |
1083 | } |
1084 | } | |
a424227e MD |
1085 | end: |
1086 | closeret = closedir(dir); | |
1087 | if (closeret) { | |
1088 | PERROR("closedir"); | |
1089 | } | |
d7ba1388 MD |
1090 | return has_warning; |
1091 | } | |
1092 | ||
1093 | static | |
afe4fd7c | 1094 | int delete_dir_recursive(const char *path) |
d7ba1388 | 1095 | { |
afe4fd7c JR |
1096 | DIR *dir; |
1097 | int dir_fd, ret = 0, closeret; | |
88ae485a | 1098 | size_t path_len; |
d7ba1388 MD |
1099 | struct dirent *entry; |
1100 | ||
1101 | /* Open trace directory */ | |
afe4fd7c JR |
1102 | dir = opendir(path); |
1103 | if (!dir) { | |
1104 | PERROR("Cannot open '%s' path", path); | |
920a187e | 1105 | ret = -errno; |
ef6fc488 | 1106 | goto end_no_closedir; |
d7ba1388 | 1107 | } |
88ae485a JR |
1108 | |
1109 | path_len = strlen(path); | |
1110 | ||
afe4fd7c JR |
1111 | dir_fd = dirfd(dir); |
1112 | if (dir_fd < 0) { | |
d7ba1388 | 1113 | PERROR("dirfd"); |
920a187e JG |
1114 | ret = -errno; |
1115 | goto end; | |
d7ba1388 MD |
1116 | } |
1117 | ||
afe4fd7c | 1118 | while ((entry = readdir(dir))) { |
88ae485a JR |
1119 | struct stat st; |
1120 | size_t name_len; | |
1121 | char filename[PATH_MAX]; | |
1122 | ||
d7ba1388 | 1123 | if (!strcmp(entry->d_name, ".") |
a424227e | 1124 | || !strcmp(entry->d_name, "..")) { |
d7ba1388 | 1125 | continue; |
a424227e | 1126 | } |
88ae485a JR |
1127 | |
1128 | name_len = strlen(entry->d_name); | |
1129 | if (path_len + name_len + 2 > sizeof(filename)) { | |
1130 | ERR("Failed to remove file: path name too long (%s/%s)", | |
1131 | path, entry->d_name); | |
1132 | continue; | |
1133 | } | |
1134 | ||
1135 | if (snprintf(filename, sizeof(filename), "%s/%s", | |
1136 | path, entry->d_name) < 0) { | |
1137 | ERR("Failed to format path."); | |
1138 | continue; | |
1139 | } | |
1140 | ||
1141 | if (stat(filename, &st)) { | |
1142 | PERROR("stat"); | |
1143 | continue; | |
1144 | } | |
1145 | ||
1146 | if (S_ISDIR(st.st_mode)) { | |
afe4fd7c JR |
1147 | char *subpath = zmalloc(PATH_MAX); |
1148 | ||
1149 | if (!subpath) { | |
1150 | PERROR("zmalloc path"); | |
1151 | ret = -1; | |
1152 | goto end; | |
1153 | } | |
1154 | strncpy(subpath, path, PATH_MAX); | |
1155 | subpath[PATH_MAX - 1] = '\0'; | |
1156 | strncat(subpath, "/", | |
1157 | PATH_MAX - strlen(subpath) - 1); | |
1158 | strncat(subpath, entry->d_name, | |
1159 | PATH_MAX - strlen(subpath) - 1); | |
1160 | ||
1161 | ret = delete_dir_recursive(subpath); | |
1162 | free(subpath); | |
1163 | if (ret) { | |
83f4233d | 1164 | /* Error occurred, abort traversal. */ |
afe4fd7c JR |
1165 | goto end; |
1166 | } | |
88ae485a | 1167 | } else if (S_ISREG(st.st_mode)) { |
afe4fd7c JR |
1168 | ret = unlinkat(dir_fd, entry->d_name, 0); |
1169 | if (ret) { | |
1170 | PERROR("Unlinking '%s'", entry->d_name); | |
1171 | goto end; | |
1172 | } | |
88ae485a | 1173 | } else { |
d7ba1388 MD |
1174 | ret = -EINVAL; |
1175 | goto end; | |
1176 | } | |
1177 | } | |
1178 | end: | |
afe4fd7c JR |
1179 | if (!ret) { |
1180 | ret = rmdir(path); | |
1181 | if (ret) { | |
1182 | PERROR("rmdir '%s'", path); | |
1183 | } | |
1184 | } | |
1185 | closeret = closedir(dir); | |
d7ba1388 MD |
1186 | if (closeret) { |
1187 | PERROR("closedir"); | |
1188 | } | |
ef6fc488 | 1189 | end_no_closedir: |
d7ba1388 MD |
1190 | return ret; |
1191 | } | |
1192 | ||
d7ba1388 MD |
1193 | static |
1194 | int view_trace(const char *viewer_path, const char *trace_path) | |
1195 | { | |
1196 | pid_t pid; | |
1197 | ||
1198 | pid = fork(); | |
1199 | if (pid < 0) { | |
1200 | /* Error */ | |
1201 | PERROR("fork"); | |
1202 | return -1; | |
1203 | } else if (pid > 0) { | |
1204 | /* Parent */ | |
1205 | int status; | |
1206 | ||
1207 | pid = waitpid(pid, &status, 0); | |
1208 | if (pid < 0 || !WIFEXITED(status)) { | |
1209 | return -1; | |
1210 | } | |
1211 | } else { | |
1212 | /* Child */ | |
1213 | int ret; | |
1214 | ||
1215 | ret = execlp(viewer_path, viewer_path, | |
1216 | trace_path, (char *) NULL); | |
1217 | if (ret) { | |
1218 | PERROR("execlp"); | |
1219 | exit(EXIT_FAILURE); | |
1220 | } | |
1221 | exit(EXIT_SUCCESS); /* Never reached */ | |
1222 | } | |
1223 | return 0; | |
1224 | } | |
1225 | ||
1226 | /* | |
1227 | * main | |
1228 | */ | |
1229 | int main(int argc, char *argv[]) | |
1230 | { | |
aa25d686 JG |
1231 | int ret; |
1232 | bool has_warning = false; | |
d7ba1388 MD |
1233 | const char *output_path = NULL; |
1234 | char tmppath[] = "/tmp/lttng-crash-XXXXXX"; | |
1235 | ||
1236 | progname = argv[0] ? argv[0] : "lttng-crash"; | |
1237 | ||
1238 | ret = parse_args(argc, argv); | |
1239 | if (ret > 0) { | |
aa25d686 | 1240 | goto end; |
d7ba1388 | 1241 | } else if (ret < 0) { |
aa25d686 JG |
1242 | has_warning = true; |
1243 | goto end; | |
d7ba1388 MD |
1244 | } |
1245 | ||
1246 | if (opt_output_path) { | |
1247 | output_path = opt_output_path; | |
1248 | ret = mkdir(output_path, S_IRWXU | S_IRWXG); | |
1249 | if (ret) { | |
1250 | PERROR("mkdir"); | |
aa25d686 JG |
1251 | has_warning = true; |
1252 | goto end; | |
d7ba1388 MD |
1253 | } |
1254 | } else { | |
1255 | output_path = mkdtemp(tmppath); | |
1256 | if (!output_path) { | |
1257 | PERROR("mkdtemp"); | |
aa25d686 JG |
1258 | has_warning = true; |
1259 | goto end; | |
d7ba1388 MD |
1260 | } |
1261 | } | |
1262 | ||
a424227e | 1263 | ret = extract_trace_recursive(output_path, input_path); |
d7ba1388 | 1264 | if (ret < 0) { |
aa25d686 JG |
1265 | has_warning = true; |
1266 | goto end; | |
d7ba1388 | 1267 | } else if (ret > 0) { |
aa25d686 JG |
1268 | /* extract_trace_recursive reported a warning. */ |
1269 | has_warning = true; | |
d7ba1388 MD |
1270 | } |
1271 | if (!opt_output_path) { | |
1272 | /* View trace */ | |
1273 | ret = view_trace(opt_viewer_path, output_path); | |
aa25d686 JG |
1274 | if (ret) { |
1275 | has_warning = true; | |
1276 | } | |
d7ba1388 | 1277 | /* unlink temporary trace */ |
afe4fd7c | 1278 | ret = delete_dir_recursive(output_path); |
aa25d686 JG |
1279 | if (ret) { |
1280 | has_warning = true; | |
1281 | } | |
d7ba1388 | 1282 | } |
aa25d686 JG |
1283 | end: |
1284 | exit(has_warning ? EXIT_FAILURE : EXIT_SUCCESS); | |
d7ba1388 | 1285 | } |