Commit | Line | Data |
---|---|---|
d7ba1388 | 1 | /* |
21cf9b6b | 2 | * Copyright (C) 2011 EfficiOS Inc. |
d7ba1388 MD |
3 | * Copyright (C) 2014 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
4 | * | |
ab5be9fa | 5 | * SPDX-License-Identifier: GPL-2.0-only |
d7ba1388 | 6 | * |
d7ba1388 MD |
7 | */ |
8 | ||
28ab034a JG |
9 | #include <common/common.hpp> |
10 | #include <common/compat/endian.hpp> | |
11 | #include <common/spawn-viewer.hpp> | |
12 | #include <common/utils.hpp> | |
13 | ||
14 | #include <lttng/lttng.h> | |
15 | ||
16 | #include <ctype.h> | |
17 | #include <dirent.h> | |
18 | #include <fcntl.h> | |
d7ba1388 | 19 | #include <getopt.h> |
28ab034a | 20 | #include <inttypes.h> |
d7ba1388 | 21 | #include <signal.h> |
28ab034a | 22 | #include <stdbool.h> |
d7ba1388 MD |
23 | #include <stdio.h> |
24 | #include <stdlib.h> | |
25 | #include <string.h> | |
28ab034a | 26 | #include <sys/mman.h> |
d7ba1388 MD |
27 | #include <sys/stat.h> |
28 | #include <sys/types.h> | |
d7ba1388 MD |
29 | #include <sys/wait.h> |
30 | #include <unistd.h> | |
c9e313bc | 31 | #include <version.hpp> |
d7ba1388 | 32 | |
28ab034a JG |
33 | #define COPY_BUFLEN 4096 |
34 | #define RB_CRASH_DUMP_ABI_LEN 32 | |
d7ba1388 | 35 | |
28ab034a | 36 | #define RB_CRASH_DUMP_ABI_MAGIC_LEN 16 |
d7ba1388 MD |
37 | |
38 | /* | |
39 | * The 128-bit magic number is xor'd in the process data so it does not | |
40 | * cause a false positive when searching for buffers by scanning memory. | |
41 | * The actual magic number is: | |
42 | * 0x17, 0x7B, 0xF1, 0x77, 0xBF, 0x17, 0x7B, 0xF1, | |
43 | * 0x77, 0xBF, 0x17, 0x7B, 0xF1, 0x77, 0xBF, 0x17, | |
44 | */ | |
28ab034a JG |
45 | #define RB_CRASH_DUMP_ABI_MAGIC_XOR \ |
46 | { \ | |
47 | 0x17 ^ 0xFF, 0x7B ^ 0xFF, 0xF1 ^ 0xFF, 0x77 ^ 0xFF, 0xBF ^ 0xFF, 0x17 ^ 0xFF, \ | |
48 | 0x7B ^ 0xFF, 0xF1 ^ 0xFF, 0x77 ^ 0xFF, 0xBF ^ 0xFF, 0x17 ^ 0xFF, \ | |
49 | 0x7B ^ 0xFF, 0xF1 ^ 0xFF, 0x77 ^ 0xFF, 0xBF ^ 0xFF, 0x17 ^ 0xFF, \ | |
d7ba1388 MD |
50 | } |
51 | ||
4fc83d94 PP |
52 | static const char *help_msg = |
53 | #ifdef LTTNG_EMBED_HELP | |
54 | #include <lttng-crash.1.h> | |
55 | #else | |
cd9adb8b | 56 | nullptr |
4fc83d94 | 57 | #endif |
28ab034a | 58 | ; |
4fc83d94 | 59 | |
d7ba1388 MD |
60 | /* |
61 | * Non-static to ensure the compiler does not optimize away the xor. | |
62 | */ | |
63 | uint8_t lttng_crash_expected_magic_xor[] = RB_CRASH_DUMP_ABI_MAGIC_XOR; | |
64 | ||
28ab034a JG |
65 | #define RB_CRASH_ENDIAN 0x1234 |
66 | #define RB_CRASH_ENDIAN_REVERSE 0x3412 | |
d7ba1388 MD |
67 | |
68 | enum lttng_crash_type { | |
69 | LTTNG_CRASH_TYPE_UST = 0, | |
70 | LTTNG_CRASH_TYPE_KERNEL = 1, | |
71 | }; | |
72 | ||
73 | /* LTTng ring buffer defines (copied) */ | |
74 | ||
28ab034a | 75 | #define HALF_ULONG_BITS(wl) (((wl) *CHAR_BIT) >> 1) |
d7ba1388 | 76 | |
28ab034a JG |
77 | #define SB_ID_OFFSET_SHIFT(wl) (HALF_ULONG_BITS(wl) + 1) |
78 | #define SB_ID_OFFSET_COUNT(wl) (1UL << SB_ID_OFFSET_SHIFT(wl)) | |
79 | #define SB_ID_OFFSET_MASK(wl) (~(SB_ID_OFFSET_COUNT(wl) - 1)) | |
d7ba1388 MD |
80 | /* |
81 | * Lowest bit of top word half belongs to noref. Used only for overwrite mode. | |
82 | */ | |
28ab034a JG |
83 | #define SB_ID_NOREF_SHIFT(wl) (SB_ID_OFFSET_SHIFT(wl) - 1) |
84 | #define SB_ID_NOREF_COUNT(wl) (1UL << SB_ID_NOREF_SHIFT(wl)) | |
85 | #define SB_ID_NOREF_MASK(wl) SB_ID_NOREF_COUNT(wl) | |
d7ba1388 MD |
86 | /* |
87 | * In overwrite mode: lowest half of word is used for index. | |
88 | * Limit of 2^16 subbuffers per buffer on 32-bit, 2^32 on 64-bit. | |
89 | * In producer-consumer mode: whole word used for index. | |
90 | */ | |
28ab034a JG |
91 | #define SB_ID_INDEX_SHIFT(wl) 0 |
92 | #define SB_ID_INDEX_COUNT(wl) (1UL << SB_ID_INDEX_SHIFT(wl)) | |
93 | #define SB_ID_INDEX_MASK(wl) (SB_ID_NOREF_COUNT(wl) - 1) | |
d7ba1388 MD |
94 | |
95 | enum rb_modes { | |
28ab034a JG |
96 | RING_BUFFER_OVERWRITE = 0, /* Overwrite when buffer full */ |
97 | RING_BUFFER_DISCARD = 1, /* Discard when buffer full */ | |
d7ba1388 MD |
98 | }; |
99 | ||
f1494934 | 100 | namespace { |
d7ba1388 MD |
101 | struct crash_abi_unknown { |
102 | uint8_t magic[RB_CRASH_DUMP_ABI_MAGIC_LEN]; | |
28ab034a JG |
103 | uint64_t mmap_length; /* Overall length of crash record */ |
104 | uint16_t endian; /* | |
105 | * { 0x12, 0x34 }: big endian | |
106 | * { 0x34, 0x12 }: little endian | |
107 | */ | |
108 | uint16_t major; /* Major number. */ | |
109 | uint16_t minor; /* Minor number. */ | |
110 | uint8_t word_size; /* Word size (bytes). */ | |
111 | uint8_t layout_type; /* enum lttng_crash_layout */ | |
d7ba1388 MD |
112 | } __attribute__((packed)); |
113 | ||
114 | struct crash_abi_0_0 { | |
115 | struct crash_abi_unknown parent; | |
116 | ||
117 | struct { | |
118 | uint32_t prod_offset; | |
119 | uint32_t consumed_offset; | |
120 | uint32_t commit_hot_array; | |
121 | uint32_t commit_hot_seq; | |
122 | uint32_t buf_wsb_array; | |
123 | uint32_t buf_wsb_id; | |
124 | uint32_t sb_array; | |
125 | uint32_t sb_array_shmp_offset; | |
126 | uint32_t sb_backend_p_offset; | |
127 | uint32_t content_size; | |
128 | uint32_t packet_size; | |
129 | } __attribute__((packed)) offset; | |
130 | struct { | |
131 | uint8_t prod_offset; | |
132 | uint8_t consumed_offset; | |
133 | uint8_t commit_hot_seq; | |
134 | uint8_t buf_wsb_id; | |
135 | uint8_t sb_array_shmp_offset; | |
136 | uint8_t sb_backend_p_offset; | |
137 | uint8_t content_size; | |
138 | uint8_t packet_size; | |
139 | } __attribute__((packed)) length; | |
140 | struct { | |
141 | uint32_t commit_hot_array; | |
142 | uint32_t buf_wsb_array; | |
143 | uint32_t sb_array; | |
144 | } __attribute__((packed)) stride; | |
145 | ||
28ab034a JG |
146 | uint64_t buf_size; /* Size of the buffer */ |
147 | uint64_t subbuf_size; /* Sub-buffer size */ | |
148 | uint64_t num_subbuf; /* Number of sub-buffers for writer */ | |
149 | uint32_t mode; /* Buffer mode: 0: overwrite, 1: discard */ | |
d7ba1388 MD |
150 | } __attribute__((packed)); |
151 | ||
152 | struct lttng_crash_layout { | |
153 | struct { | |
28ab034a JG |
154 | int prod_offset, consumed_offset, commit_hot_array, commit_hot_seq, buf_wsb_array, |
155 | buf_wsb_id, sb_array, sb_array_shmp_offset, sb_backend_p_offset, | |
156 | content_size, packet_size; | |
d7ba1388 MD |
157 | } offset; |
158 | struct { | |
28ab034a JG |
159 | int prod_offset, consumed_offset, commit_hot_seq, buf_wsb_id, sb_array_shmp_offset, |
160 | sb_backend_p_offset, content_size, packet_size; | |
d7ba1388 MD |
161 | } length; |
162 | struct { | |
163 | int commit_hot_array, buf_wsb_array, sb_array; | |
164 | } stride; | |
165 | ||
166 | int reverse_byte_order; | |
167 | int word_size; | |
168 | ||
28ab034a JG |
169 | uint64_t mmap_length; /* Length of crash record */ |
170 | uint64_t buf_size; /* Size of the buffer */ | |
171 | uint64_t subbuf_size; /* Sub-buffer size */ | |
172 | uint64_t num_subbuf; /* Number of sub-buffers for writer */ | |
173 | uint32_t mode; /* Buffer mode: 0: overwrite, 1: discard */ | |
d7ba1388 | 174 | }; |
f1494934 | 175 | } /* namespace */ |
d7ba1388 MD |
176 | |
177 | /* Variables */ | |
b53d4e59 | 178 | static const char *progname; |
cd9adb8b JG |
179 | static char *opt_viewer_path = nullptr; |
180 | static char *opt_output_path = nullptr; | |
d7ba1388 | 181 | |
40b4fee7 | 182 | static char *the_input_path; |
d7ba1388 MD |
183 | |
184 | int lttng_opt_quiet, lttng_opt_verbose, lttng_opt_mi; | |
185 | ||
186 | enum { | |
187 | OPT_DUMP_OPTIONS, | |
188 | }; | |
189 | ||
190 | /* Getopt options. No first level command. */ | |
191 | static struct option long_options[] = { | |
cd9adb8b JG |
192 | { "version", 0, nullptr, 'V' }, { "help", 0, nullptr, 'h' }, |
193 | { "verbose", 0, nullptr, 'v' }, { "viewer", 1, nullptr, 'e' }, | |
194 | { "extract", 1, nullptr, 'x' }, { "list-options", 0, nullptr, OPT_DUMP_OPTIONS }, | |
195 | { nullptr, 0, nullptr, 0 }, | |
d7ba1388 MD |
196 | }; |
197 | ||
cd9adb8b | 198 | static void usage() |
d7ba1388 | 199 | { |
4fc83d94 | 200 | int ret = utils_show_help(1, "lttng-crash", help_msg); |
6ef14df5 PP |
201 | |
202 | if (ret) { | |
4fc83d94 | 203 | ERR("Cannot show --help for `lttng-crash`"); |
6ef14df5 PP |
204 | perror("exec"); |
205 | exit(EXIT_FAILURE); | |
206 | } | |
d7ba1388 MD |
207 | } |
208 | ||
209 | static void version(FILE *ofp) | |
210 | { | |
28ab034a JG |
211 | fprintf(ofp, |
212 | "%s (LTTng Crash Trace Viewer) " VERSION " - " VERSION_NAME "%s%s\n", | |
213 | progname, | |
214 | GIT_VERSION[0] == '\0' ? "" : " - " GIT_VERSION, | |
215 | EXTRA_VERSION_NAME[0] == '\0' ? "" : " - " EXTRA_VERSION_NAME); | |
d7ba1388 MD |
216 | } |
217 | ||
218 | /* | |
219 | * list_options | |
220 | * | |
221 | * List options line by line. This is mostly for bash auto completion and to | |
222 | * avoid difficult parsing. | |
223 | */ | |
224 | static void list_options(FILE *ofp) | |
225 | { | |
226 | int i = 0; | |
cd9adb8b | 227 | struct option *option = nullptr; |
d7ba1388 MD |
228 | |
229 | option = &long_options[i]; | |
cd9adb8b | 230 | while (option->name != nullptr) { |
d7ba1388 MD |
231 | fprintf(ofp, "--%s\n", option->name); |
232 | ||
233 | if (isprint(option->val)) { | |
234 | fprintf(ofp, "-%c\n", option->val); | |
235 | } | |
236 | ||
237 | i++; | |
238 | option = &long_options[i]; | |
239 | } | |
240 | } | |
241 | ||
242 | /* | |
243 | * Parse command line arguments. | |
244 | * | |
245 | * Return 0 if OK, else -1 | |
246 | */ | |
247 | static int parse_args(int argc, char **argv) | |
248 | { | |
249 | int opt, ret = 0; | |
250 | ||
251 | if (argc < 2) { | |
6ef14df5 | 252 | usage(); |
d7ba1388 MD |
253 | exit(EXIT_FAILURE); |
254 | } | |
255 | ||
cd9adb8b | 256 | while ((opt = getopt_long(argc, argv, "+Vhve:x:", long_options, nullptr)) != -1) { |
d7ba1388 MD |
257 | switch (opt) { |
258 | case 'V': | |
259 | version(stdout); | |
260 | ret = 1; | |
261 | goto end; | |
262 | case 'h': | |
6ef14df5 | 263 | usage(); |
d7ba1388 MD |
264 | ret = 1; |
265 | goto end; | |
266 | case 'v': | |
267 | /* There is only 3 possible level of verbosity. (-vvv) */ | |
268 | if (lttng_opt_verbose < 3) { | |
269 | lttng_opt_verbose += 1; | |
270 | } | |
271 | break; | |
272 | case 'e': | |
9030e9a9 | 273 | free(opt_viewer_path); |
d7ba1388 MD |
274 | opt_viewer_path = strdup(optarg); |
275 | break; | |
276 | case 'x': | |
9030e9a9 | 277 | free(opt_output_path); |
d7ba1388 MD |
278 | opt_output_path = strdup(optarg); |
279 | break; | |
280 | case OPT_DUMP_OPTIONS: | |
281 | list_options(stdout); | |
282 | ret = 1; | |
283 | goto end; | |
284 | default: | |
6ef14df5 | 285 | ERR("Unknown command-line option"); |
d7ba1388 MD |
286 | goto error; |
287 | } | |
288 | } | |
289 | ||
a424227e | 290 | /* No leftovers, or more than one input path, print usage and quit */ |
6ef14df5 PP |
291 | if (argc - optind != 1) { |
292 | ERR("Command-line error: Specify exactly one input path"); | |
d7ba1388 MD |
293 | goto error; |
294 | } | |
295 | ||
40b4fee7 | 296 | the_input_path = argv[optind]; |
d7ba1388 MD |
297 | end: |
298 | return ret; | |
299 | ||
300 | error: | |
301 | return -1; | |
302 | } | |
303 | ||
28ab034a | 304 | static int copy_file(const char *file_dest, const char *file_src) |
d7ba1388 | 305 | { |
8726a045 | 306 | int fd_src = -1, fd_dest = -1; |
d7ba1388 MD |
307 | ssize_t readlen, writelen; |
308 | char buf[COPY_BUFLEN]; | |
8726a045 | 309 | int ret; |
d7ba1388 MD |
310 | |
311 | DBG("Copy metadata file '%s' into '%s'", file_src, file_dest); | |
312 | ||
313 | fd_src = open(file_src, O_RDONLY); | |
314 | if (fd_src < 0) { | |
315 | PERROR("Error opening %s for reading", file_src); | |
8726a045 JR |
316 | ret = -errno; |
317 | goto error; | |
d7ba1388 | 318 | } |
28ab034a | 319 | fd_dest = open(file_dest, O_RDWR | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d7ba1388 MD |
320 | if (fd_dest < 0) { |
321 | PERROR("Error opening %s for writing", file_dest); | |
8726a045 JR |
322 | ret = -errno; |
323 | goto error; | |
d7ba1388 MD |
324 | } |
325 | ||
326 | for (;;) { | |
327 | readlen = lttng_read(fd_src, buf, COPY_BUFLEN); | |
328 | if (readlen < 0) { | |
329 | PERROR("Error reading input file"); | |
8726a045 JR |
330 | ret = -1; |
331 | goto error; | |
d7ba1388 MD |
332 | } |
333 | if (!readlen) { | |
334 | break; | |
335 | } | |
336 | writelen = lttng_write(fd_dest, buf, readlen); | |
337 | if (writelen < readlen) { | |
338 | PERROR("Error writing to output file"); | |
8726a045 JR |
339 | ret = -1; |
340 | goto error; | |
341 | } | |
342 | } | |
343 | ||
344 | ret = 0; | |
345 | error: | |
346 | if (fd_src >= 0) { | |
347 | if (close(fd_src) < 0) { | |
348 | PERROR("Error closing %s", file_src); | |
349 | } | |
350 | } | |
351 | ||
352 | if (fd_dest >= 0) { | |
353 | if (close(fd_dest) < 0) { | |
354 | PERROR("Error closing %s", file_dest); | |
d7ba1388 MD |
355 | } |
356 | } | |
8726a045 | 357 | return ret; |
d7ba1388 MD |
358 | } |
359 | ||
28ab034a JG |
360 | static uint64_t |
361 | _crash_get_field(const struct lttng_crash_layout *layout, const char *ptr, size_t size) | |
d7ba1388 MD |
362 | { |
363 | switch (size) { | |
28ab034a JG |
364 | case 1: |
365 | return *(uint8_t *) ptr; | |
366 | case 2: | |
367 | if (layout->reverse_byte_order) { | |
4ff128af | 368 | return bswap_16(*(uint16_t *) ptr); |
d7ba1388 MD |
369 | } else { |
370 | return *(uint16_t *) ptr; | |
d7ba1388 | 371 | } |
28ab034a JG |
372 | case 4: |
373 | if (layout->reverse_byte_order) { | |
4ff128af | 374 | return bswap_32(*(uint32_t *) ptr); |
d7ba1388 MD |
375 | } else { |
376 | return *(uint32_t *) ptr; | |
d7ba1388 | 377 | } |
28ab034a JG |
378 | case 8: |
379 | if (layout->reverse_byte_order) { | |
4ff128af | 380 | return bswap_64(*(uint64_t *) ptr); |
d7ba1388 MD |
381 | } else { |
382 | return *(uint64_t *) ptr; | |
383 | } | |
384 | default: | |
385 | abort(); | |
386 | return -1; | |
387 | } | |
d7ba1388 MD |
388 | } |
389 | ||
28ab034a | 390 | #define crash_get_field(layout, map, name) \ |
5c7248cd | 391 | _crash_get_field(layout, (map) + (layout)->offset.name, (layout)->length.name) |
28ab034a | 392 | |
5c7248cd JG |
393 | #define crash_get_array_field(layout, map, array_name, idx, field_name) \ |
394 | _crash_get_field(layout, \ | |
395 | (map) + (layout)->offset.array_name + \ | |
396 | ((idx) * (layout)->stride.array_name) + \ | |
397 | (layout)->offset.field_name, \ | |
28ab034a JG |
398 | (layout)->length.field_name) |
399 | ||
400 | #define crash_get_hdr_raw_field(layout, hdr, name) ((hdr)->name) | |
401 | ||
402 | #define crash_get_hdr_field(layout, hdr, name) \ | |
403 | _crash_get_field(layout, (const char *) &(hdr)->name, sizeof((hdr)->name)) | |
404 | ||
405 | #define crash_get_layout(layout, hdr, name) \ | |
406 | do { \ | |
407 | (layout)->name = crash_get_hdr_field(layout, hdr, name); \ | |
408 | DBG("layout.%s = %" PRIu64, #name, (uint64_t) (layout)->name); \ | |
d7ba1388 MD |
409 | } while (0) |
410 | ||
28ab034a | 411 | static int get_crash_layout_0_0(struct lttng_crash_layout *layout, char *map) |
d7ba1388 MD |
412 | { |
413 | const struct crash_abi_0_0 *abi = (const struct crash_abi_0_0 *) map; | |
414 | ||
415 | crash_get_layout(layout, abi, offset.prod_offset); | |
416 | crash_get_layout(layout, abi, offset.consumed_offset); | |
417 | crash_get_layout(layout, abi, offset.commit_hot_array); | |
418 | crash_get_layout(layout, abi, offset.commit_hot_seq); | |
419 | crash_get_layout(layout, abi, offset.buf_wsb_array); | |
420 | crash_get_layout(layout, abi, offset.buf_wsb_id); | |
421 | crash_get_layout(layout, abi, offset.sb_array); | |
422 | crash_get_layout(layout, abi, offset.sb_array_shmp_offset); | |
423 | crash_get_layout(layout, abi, offset.sb_backend_p_offset); | |
424 | crash_get_layout(layout, abi, offset.content_size); | |
425 | crash_get_layout(layout, abi, offset.packet_size); | |
426 | ||
427 | crash_get_layout(layout, abi, length.prod_offset); | |
428 | crash_get_layout(layout, abi, length.consumed_offset); | |
429 | crash_get_layout(layout, abi, length.commit_hot_seq); | |
430 | crash_get_layout(layout, abi, length.buf_wsb_id); | |
431 | crash_get_layout(layout, abi, length.sb_array_shmp_offset); | |
432 | crash_get_layout(layout, abi, length.sb_backend_p_offset); | |
433 | crash_get_layout(layout, abi, length.content_size); | |
434 | crash_get_layout(layout, abi, length.packet_size); | |
435 | ||
436 | crash_get_layout(layout, abi, stride.commit_hot_array); | |
437 | crash_get_layout(layout, abi, stride.buf_wsb_array); | |
438 | crash_get_layout(layout, abi, stride.sb_array); | |
439 | ||
440 | crash_get_layout(layout, abi, buf_size); | |
441 | crash_get_layout(layout, abi, subbuf_size); | |
442 | crash_get_layout(layout, abi, num_subbuf); | |
443 | crash_get_layout(layout, abi, mode); | |
444 | ||
445 | return 0; | |
446 | } | |
447 | ||
28ab034a | 448 | static void print_dbg_magic(const uint8_t *magic) |
d7ba1388 MD |
449 | { |
450 | DBG("magic: 0x%X%X%X%X%X%X%X%X%X%X%X%X%X%X%X%X", | |
28ab034a JG |
451 | magic[0], |
452 | magic[1], | |
453 | magic[2], | |
454 | magic[3], | |
455 | magic[4], | |
456 | magic[5], | |
457 | magic[6], | |
458 | magic[7], | |
459 | magic[8], | |
460 | magic[9], | |
461 | magic[10], | |
462 | magic[11], | |
463 | magic[12], | |
464 | magic[13], | |
465 | magic[14], | |
466 | magic[15]); | |
d7ba1388 MD |
467 | } |
468 | ||
28ab034a | 469 | static int check_magic(const uint8_t *magic) |
d7ba1388 MD |
470 | { |
471 | int i; | |
472 | ||
473 | for (i = 0; i < RB_CRASH_DUMP_ABI_MAGIC_LEN; i++) { | |
474 | if ((magic[i] ^ 0xFF) != lttng_crash_expected_magic_xor[i]) { | |
475 | return -1; | |
476 | } | |
477 | } | |
478 | return 0; | |
479 | } | |
480 | ||
28ab034a | 481 | static int get_crash_layout(struct lttng_crash_layout *layout, int fd, const char *input_file) |
d7ba1388 MD |
482 | { |
483 | char *map; | |
484 | int ret = 0, unmapret; | |
485 | const uint8_t *magic; | |
486 | uint64_t mmap_length; | |
487 | uint16_t major, minor; | |
488 | uint8_t word_size; | |
489 | const struct crash_abi_unknown *abi; | |
490 | uint16_t endian; | |
491 | enum lttng_crash_type layout_type; | |
e6c6e235 | 492 | struct stat stat; |
d7ba1388 | 493 | |
e6c6e235 MD |
494 | ret = fstat(fd, &stat); |
495 | if (ret < 0) { | |
496 | PERROR("Failed to fstat '%s'", input_file); | |
497 | return -1; | |
498 | } | |
499 | if (stat.st_size < RB_CRASH_DUMP_ABI_LEN) { | |
500 | ERR("File '%s' truncated: file length of %" PRIi64 | |
28ab034a JG |
501 | " bytes does not meet the minimal expected " |
502 | "length of %d bytes", | |
503 | input_file, | |
504 | (int64_t) stat.st_size, | |
505 | RB_CRASH_DUMP_ABI_LEN); | |
e6c6e235 MD |
506 | return -1; |
507 | } | |
cd9adb8b | 508 | map = (char *) mmap(nullptr, RB_CRASH_DUMP_ABI_LEN, PROT_READ, MAP_PRIVATE, fd, 0); |
d7ba1388 MD |
509 | if (map == MAP_FAILED) { |
510 | PERROR("Mapping file"); | |
511 | return -1; | |
512 | } | |
513 | abi = (const struct crash_abi_unknown *) map; | |
514 | magic = crash_get_hdr_raw_field(layout, abi, magic); | |
515 | print_dbg_magic(magic); | |
516 | if (check_magic(magic)) { | |
517 | DBG("Unknown magic number"); | |
28ab034a | 518 | ret = 1; /* positive return value, skip */ |
d7ba1388 MD |
519 | goto end; |
520 | } | |
521 | endian = crash_get_hdr_field(layout, abi, endian); | |
522 | switch (endian) { | |
523 | case RB_CRASH_ENDIAN: | |
524 | break; | |
525 | case RB_CRASH_ENDIAN_REVERSE: | |
526 | layout->reverse_byte_order = 1; | |
527 | break; | |
528 | default: | |
529 | DBG("Unknown endianness value: 0x%X", (unsigned int) endian); | |
28ab034a | 530 | ret = 1; /* positive return value, skip */ |
d7ba1388 MD |
531 | goto end; |
532 | } | |
533 | layout_type = (enum lttng_crash_type) crash_get_hdr_field(layout, abi, layout_type); | |
534 | switch (layout_type) { | |
535 | case LTTNG_CRASH_TYPE_UST: | |
536 | break; | |
537 | case LTTNG_CRASH_TYPE_KERNEL: | |
538 | ERR("lttng-modules buffer layout support not implemented"); | |
28ab034a | 539 | ret = 1; /* positive return value, skip */ |
d7ba1388 MD |
540 | goto end; |
541 | default: | |
542 | ERR("Unknown layout type %u", (unsigned int) layout_type); | |
28ab034a | 543 | ret = 1; /* positive return value, skip */ |
d7ba1388 MD |
544 | goto end; |
545 | } | |
546 | mmap_length = crash_get_hdr_field(layout, abi, mmap_length); | |
547 | DBG("mmap_length: %" PRIu64, mmap_length); | |
548 | layout->mmap_length = mmap_length; | |
549 | major = crash_get_hdr_field(layout, abi, major); | |
550 | DBG("major: %u", major); | |
551 | minor = crash_get_hdr_field(layout, abi, minor); | |
552 | DBG("minor: %u", minor); | |
553 | word_size = crash_get_hdr_field(layout, abi, word_size); | |
554 | DBG("word_size: %u", word_size); | |
555 | switch (major) { | |
556 | case 0: | |
557 | switch (minor) { | |
558 | case 0: | |
559 | ret = get_crash_layout_0_0(layout, map); | |
560 | if (ret) | |
561 | goto end; | |
562 | break; | |
563 | default: | |
564 | ret = -1; | |
565 | ERR("Unsupported crash ABI %u.%u\n", major, minor); | |
566 | goto end; | |
567 | } | |
568 | break; | |
569 | default: | |
570 | ERR("Unsupported crash ABI %u.%u\n", major, minor); | |
571 | ret = -1; | |
572 | goto end; | |
573 | } | |
574 | layout->word_size = word_size; | |
575 | end: | |
576 | unmapret = munmap(map, RB_CRASH_DUMP_ABI_LEN); | |
577 | if (unmapret) { | |
578 | PERROR("munmap"); | |
579 | } | |
580 | return ret; | |
581 | } | |
582 | ||
583 | /* buf_trunc mask selects only the buffer number. */ | |
28ab034a | 584 | static inline uint64_t buf_trunc(uint64_t offset, uint64_t buf_size) |
d7ba1388 MD |
585 | { |
586 | return offset & ~(buf_size - 1); | |
587 | } | |
588 | ||
589 | /* subbuf_trunc mask selects the subbuffer number. */ | |
28ab034a | 590 | static inline uint64_t subbuf_trunc(uint64_t offset, uint64_t subbuf_size) |
d7ba1388 MD |
591 | { |
592 | return offset & ~(subbuf_size - 1); | |
593 | } | |
594 | ||
595 | /* buf_offset mask selects only the offset within the current buffer. */ | |
28ab034a | 596 | static inline uint64_t buf_offset(uint64_t offset, uint64_t buf_size) |
d7ba1388 MD |
597 | { |
598 | return offset & (buf_size - 1); | |
599 | } | |
600 | ||
601 | /* subbuf_offset mask selects the offset within the current subbuffer. */ | |
28ab034a | 602 | static inline uint64_t subbuf_offset(uint64_t offset, uint64_t subbuf_size) |
d7ba1388 MD |
603 | { |
604 | return offset & (subbuf_size - 1); | |
605 | } | |
606 | ||
607 | /* subbuf_index returns the index of the current subbuffer within the buffer. */ | |
28ab034a | 608 | static inline uint64_t subbuf_index(uint64_t offset, uint64_t buf_size, uint64_t subbuf_size) |
d7ba1388 MD |
609 | { |
610 | return buf_offset(offset, buf_size) / subbuf_size; | |
611 | } | |
612 | ||
28ab034a | 613 | static inline uint64_t subbuffer_id_get_index(uint32_t mode, uint64_t id, unsigned int wl) |
d7ba1388 MD |
614 | { |
615 | if (mode == RING_BUFFER_OVERWRITE) | |
616 | return id & SB_ID_INDEX_MASK(wl); | |
617 | else | |
618 | return id; | |
619 | } | |
620 | ||
28ab034a JG |
621 | static int |
622 | copy_crash_subbuf(const struct lttng_crash_layout *layout, int fd_dest, char *buf, uint64_t offset) | |
d7ba1388 | 623 | { |
28ab034a JG |
624 | uint64_t buf_size, subbuf_size, num_subbuf, sbidx, id, sb_bindex, rpages_offset, p_offset, |
625 | seq_cc, committed, commit_count_mask, consumed_cur, packet_size; | |
d7ba1388 MD |
626 | char *subbuf_ptr; |
627 | ssize_t writelen; | |
628 | ||
629 | /* | |
630 | * Get the current subbuffer by applying the proper mask to | |
631 | * "offset", and looking up the subbuf location within the | |
632 | * source file buf. | |
633 | */ | |
634 | ||
635 | buf_size = layout->buf_size; | |
636 | subbuf_size = layout->subbuf_size; | |
637 | num_subbuf = layout->num_subbuf; | |
638 | ||
639 | switch (layout->word_size) { | |
28ab034a JG |
640 | case 4: |
641 | commit_count_mask = 0xFFFFFFFFULL / num_subbuf; | |
d7ba1388 | 642 | break; |
28ab034a JG |
643 | case 8: |
644 | commit_count_mask = 0xFFFFFFFFFFFFFFFFULL / num_subbuf; | |
d7ba1388 MD |
645 | break; |
646 | default: | |
28ab034a | 647 | ERR("Unsupported word size: %u", (unsigned int) layout->word_size); |
d7ba1388 MD |
648 | return -EINVAL; |
649 | } | |
650 | ||
5f98d630 | 651 | DBG("Copy crash subbuffer at offset %" PRIu64, offset); |
d7ba1388 MD |
652 | sbidx = subbuf_index(offset, buf_size, subbuf_size); |
653 | ||
654 | /* | |
655 | * Find where the seq cc is located. Compute length of data to | |
656 | * copy. | |
657 | */ | |
28ab034a | 658 | seq_cc = crash_get_array_field(layout, buf, commit_hot_array, sbidx, commit_hot_seq); |
d7ba1388 MD |
659 | consumed_cur = crash_get_field(layout, buf, consumed_offset); |
660 | ||
661 | /* | |
662 | * Check that the buffer we are getting is after or at | |
663 | * consumed_cur position. | |
664 | */ | |
28ab034a JG |
665 | if ((long) subbuf_trunc(offset, subbuf_size) - |
666 | (long) subbuf_trunc(consumed_cur, subbuf_size) < | |
667 | 0) { | |
d7ba1388 MD |
668 | DBG("No data: position is before consumed_cur"); |
669 | goto nodata; | |
670 | } | |
671 | ||
672 | /* | |
673 | * Check if subbuffer has been fully committed. | |
674 | */ | |
28ab034a JG |
675 | if (((seq_cc - subbuf_size) & commit_count_mask) - |
676 | (buf_trunc(offset, buf_size) / num_subbuf) == | |
677 | 0) { | |
d7ba1388 MD |
678 | committed = subbuf_size; |
679 | } else { | |
680 | committed = subbuf_offset(seq_cc, subbuf_size); | |
681 | if (!committed) { | |
682 | DBG("No data committed, seq_cc: %" PRIu64, seq_cc); | |
683 | goto nodata; | |
684 | } | |
685 | } | |
686 | ||
687 | /* Find actual physical offset in subbuffer table */ | |
28ab034a JG |
688 | id = crash_get_array_field(layout, buf, buf_wsb_array, sbidx, buf_wsb_id); |
689 | sb_bindex = subbuffer_id_get_index(layout->mode, id, layout->word_size); | |
690 | rpages_offset = | |
691 | crash_get_array_field(layout, buf, sb_array, sb_bindex, sb_array_shmp_offset); | |
692 | p_offset = crash_get_field(layout, buf + rpages_offset, sb_backend_p_offset); | |
d7ba1388 MD |
693 | subbuf_ptr = buf + p_offset; |
694 | ||
695 | if (committed == subbuf_size) { | |
696 | /* | |
697 | * Packet header can be used. | |
698 | */ | |
699 | if (layout->length.packet_size) { | |
700 | memcpy(&packet_size, | |
28ab034a JG |
701 | subbuf_ptr + layout->offset.packet_size, |
702 | layout->length.packet_size); | |
d7ba1388 | 703 | if (layout->reverse_byte_order) { |
4ff128af | 704 | packet_size = bswap_64(packet_size); |
d7ba1388 MD |
705 | } |
706 | packet_size /= CHAR_BIT; | |
707 | } else { | |
708 | packet_size = subbuf_size; | |
709 | } | |
710 | } else { | |
711 | uint64_t patch_size; | |
712 | ||
713 | /* | |
714 | * Find where to patch the sub-buffer header with actual | |
715 | * readable data len and packet len, derived from seq | |
716 | * cc. Patch it in our in-memory copy. | |
717 | */ | |
718 | patch_size = committed * CHAR_BIT; | |
719 | if (layout->reverse_byte_order) { | |
4ff128af | 720 | patch_size = bswap_64(patch_size); |
d7ba1388 MD |
721 | } |
722 | if (layout->length.content_size) { | |
723 | memcpy(subbuf_ptr + layout->offset.content_size, | |
28ab034a JG |
724 | &patch_size, |
725 | layout->length.content_size); | |
d7ba1388 MD |
726 | } |
727 | if (layout->length.packet_size) { | |
728 | memcpy(subbuf_ptr + layout->offset.packet_size, | |
28ab034a JG |
729 | &patch_size, |
730 | layout->length.packet_size); | |
d7ba1388 MD |
731 | } |
732 | packet_size = committed; | |
733 | } | |
734 | ||
735 | /* | |
736 | * Copy packet into fd_dest. | |
737 | */ | |
738 | writelen = lttng_write(fd_dest, subbuf_ptr, packet_size); | |
739 | if (writelen < packet_size) { | |
740 | PERROR("Error writing to output file"); | |
741 | return -1; | |
742 | } | |
743 | DBG("Copied %" PRIu64 " bytes of data", packet_size); | |
744 | return 0; | |
745 | ||
746 | nodata: | |
747 | return -ENODATA; | |
748 | } | |
749 | ||
28ab034a | 750 | static int copy_crash_data(const struct lttng_crash_layout *layout, int fd_dest, int fd_src) |
d7ba1388 MD |
751 | { |
752 | char *buf; | |
753 | int ret = 0, has_data = 0; | |
754 | struct stat statbuf; | |
755 | size_t src_file_len; | |
756 | uint64_t prod_offset, consumed_offset; | |
757 | uint64_t offset, subbuf_size; | |
758 | ssize_t readlen; | |
759 | ||
760 | ret = fstat(fd_src, &statbuf); | |
761 | if (ret) { | |
762 | return ret; | |
763 | } | |
764 | src_file_len = layout->mmap_length; | |
64803277 | 765 | buf = calloc<char>(src_file_len); |
d7ba1388 MD |
766 | if (!buf) { |
767 | return -1; | |
768 | } | |
769 | readlen = lttng_read(fd_src, buf, src_file_len); | |
770 | if (readlen < 0) { | |
771 | PERROR("Error reading input file"); | |
309fc9bf MD |
772 | ret = -1; |
773 | goto end; | |
d7ba1388 MD |
774 | } |
775 | ||
776 | prod_offset = crash_get_field(layout, buf, prod_offset); | |
777 | DBG("prod_offset: 0x%" PRIx64, prod_offset); | |
778 | consumed_offset = crash_get_field(layout, buf, consumed_offset); | |
779 | DBG("consumed_offset: 0x%" PRIx64, consumed_offset); | |
780 | subbuf_size = layout->subbuf_size; | |
781 | ||
28ab034a | 782 | for (offset = consumed_offset; offset < prod_offset; offset += subbuf_size) { |
d7ba1388 MD |
783 | ret = copy_crash_subbuf(layout, fd_dest, buf, offset); |
784 | if (!ret) { | |
785 | has_data = 1; | |
786 | } | |
787 | if (ret) { | |
788 | goto end; | |
789 | } | |
790 | } | |
791 | end: | |
792 | free(buf); | |
793 | if (ret && ret != -ENODATA) { | |
794 | return ret; | |
795 | } | |
796 | if (has_data) { | |
797 | return 0; | |
798 | } else { | |
799 | return -ENODATA; | |
800 | } | |
801 | } | |
802 | ||
28ab034a JG |
803 | static int |
804 | extract_file(int output_dir_fd, const char *output_file, int input_dir_fd, const char *input_file) | |
d7ba1388 MD |
805 | { |
806 | int fd_dest, fd_src, ret = 0, closeret; | |
807 | struct lttng_crash_layout layout; | |
808 | ||
28ab034a | 809 | layout.reverse_byte_order = 0; /* For reading magic number */ |
d7ba1388 MD |
810 | |
811 | DBG("Extract file '%s'", input_file); | |
812 | fd_src = openat(input_dir_fd, input_file, O_RDONLY); | |
813 | if (fd_src < 0) { | |
28ab034a | 814 | PERROR("Error opening '%s' for reading", input_file); |
d7ba1388 MD |
815 | ret = -1; |
816 | goto end; | |
817 | } | |
818 | ||
819 | /* Query the crash ABI layout */ | |
e6c6e235 | 820 | ret = get_crash_layout(&layout, fd_src, input_file); |
d7ba1388 MD |
821 | if (ret) { |
822 | goto close_src; | |
823 | } | |
824 | ||
28ab034a JG |
825 | fd_dest = openat(output_dir_fd, |
826 | output_file, | |
827 | O_RDWR | O_CREAT | O_EXCL, | |
828 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
d7ba1388 | 829 | if (fd_dest < 0) { |
28ab034a | 830 | PERROR("Error opening '%s' for writing", output_file); |
d7ba1388 MD |
831 | ret = -1; |
832 | goto close_src; | |
833 | } | |
834 | ||
835 | ret = copy_crash_data(&layout, fd_dest, fd_src); | |
836 | if (ret) { | |
837 | goto close_dest; | |
838 | } | |
839 | ||
840 | close_dest: | |
841 | closeret = close(fd_dest); | |
842 | if (closeret) { | |
843 | PERROR("close"); | |
844 | } | |
845 | if (ret == -ENODATA) { | |
846 | closeret = unlinkat(output_dir_fd, output_file, 0); | |
847 | if (closeret) { | |
848 | PERROR("unlinkat"); | |
849 | } | |
850 | } | |
851 | close_src: | |
852 | closeret = close(fd_src); | |
853 | if (closeret) { | |
854 | PERROR("close"); | |
855 | } | |
856 | end: | |
857 | return ret; | |
858 | } | |
859 | ||
28ab034a | 860 | static int extract_all_files(const char *output_path, const char *input_path) |
d7ba1388 MD |
861 | { |
862 | DIR *input_dir, *output_dir; | |
863 | int input_dir_fd, output_dir_fd, ret = 0, closeret; | |
28ab034a | 864 | struct dirent *entry; /* input */ |
d7ba1388 MD |
865 | |
866 | /* Open input directory */ | |
867 | input_dir = opendir(input_path); | |
868 | if (!input_dir) { | |
869 | PERROR("Cannot open '%s' path", input_path); | |
870 | return -1; | |
871 | } | |
872 | input_dir_fd = dirfd(input_dir); | |
873 | if (input_dir_fd < 0) { | |
874 | PERROR("dirfd"); | |
875 | return -1; | |
876 | } | |
877 | ||
878 | /* Open output directory */ | |
879 | output_dir = opendir(output_path); | |
880 | if (!output_dir) { | |
881 | PERROR("Cannot open '%s' path", output_path); | |
882 | return -1; | |
883 | } | |
884 | output_dir_fd = dirfd(output_dir); | |
885 | if (output_dir_fd < 0) { | |
886 | PERROR("dirfd"); | |
887 | return -1; | |
888 | } | |
889 | ||
890 | while ((entry = readdir(input_dir))) { | |
28ab034a | 891 | if (!strcmp(entry->d_name, ".") || !strcmp(entry->d_name, "..")) |
d7ba1388 | 892 | continue; |
28ab034a | 893 | ret = extract_file(output_dir_fd, entry->d_name, input_dir_fd, entry->d_name); |
d7ba1388 MD |
894 | if (ret == -ENODATA) { |
895 | DBG("No data in file '%s', skipping", entry->d_name); | |
896 | ret = 0; | |
897 | continue; | |
898 | } else if (ret < 0) { | |
899 | break; | |
900 | } else if (ret > 0) { | |
901 | DBG("Skipping file '%s'", entry->d_name); | |
902 | ret = 0; | |
903 | continue; | |
904 | } | |
905 | } | |
906 | closeret = closedir(output_dir); | |
907 | if (closeret) { | |
908 | PERROR("closedir"); | |
909 | } | |
910 | closeret = closedir(input_dir); | |
911 | if (closeret) { | |
912 | PERROR("closedir"); | |
913 | } | |
914 | return ret; | |
915 | } | |
916 | ||
28ab034a | 917 | static int extract_one_trace(const char *output_path, const char *input_path) |
d7ba1388 MD |
918 | { |
919 | char dest[PATH_MAX], src[PATH_MAX]; | |
920 | int ret; | |
921 | ||
922 | DBG("Extract crash trace '%s' into '%s'", input_path, output_path); | |
923 | ||
924 | /* Copy metadata */ | |
925 | strncpy(dest, output_path, PATH_MAX); | |
926 | dest[PATH_MAX - 1] = '\0'; | |
927 | strncat(dest, "/metadata", PATH_MAX - strlen(dest) - 1); | |
928 | ||
929 | strncpy(src, input_path, PATH_MAX); | |
930 | src[PATH_MAX - 1] = '\0'; | |
931 | strncat(src, "/metadata", PATH_MAX - strlen(dest) - 1); | |
932 | ||
933 | ret = copy_file(dest, src); | |
934 | if (ret) { | |
935 | return ret; | |
936 | } | |
937 | ||
938 | /* Extract each other file that has expected header */ | |
939 | return extract_all_files(output_path, input_path); | |
940 | } | |
941 | ||
28ab034a | 942 | static int extract_trace_recursive(const char *output_path, const char *input_path) |
d7ba1388 | 943 | { |
a424227e MD |
944 | DIR *dir; |
945 | int dir_fd, ret = 0, closeret; | |
946 | struct dirent *entry; | |
88ae485a | 947 | size_t path_len; |
d7ba1388 MD |
948 | int has_warning = 0; |
949 | ||
a424227e MD |
950 | /* Open directory */ |
951 | dir = opendir(input_path); | |
952 | if (!dir) { | |
953 | PERROR("Cannot open '%s' path", input_path); | |
954 | return -1; | |
955 | } | |
88ae485a JR |
956 | |
957 | path_len = strlen(input_path); | |
958 | ||
a424227e MD |
959 | dir_fd = dirfd(dir); |
960 | if (dir_fd < 0) { | |
961 | PERROR("dirfd"); | |
d7ba1388 MD |
962 | return -1; |
963 | } | |
964 | ||
a424227e | 965 | while ((entry = readdir(dir))) { |
88ae485a JR |
966 | struct stat st; |
967 | size_t name_len; | |
968 | char filename[PATH_MAX]; | |
969 | ||
28ab034a | 970 | if (!strcmp(entry->d_name, ".") || !strcmp(entry->d_name, "..")) { |
a424227e MD |
971 | continue; |
972 | } | |
88ae485a JR |
973 | |
974 | name_len = strlen(entry->d_name); | |
975 | if (path_len + name_len + 2 > sizeof(filename)) { | |
976 | ERR("Failed to remove file: path name too long (%s/%s)", | |
28ab034a JG |
977 | input_path, |
978 | entry->d_name); | |
88ae485a JR |
979 | continue; |
980 | } | |
981 | ||
28ab034a | 982 | if (snprintf(filename, sizeof(filename), "%s/%s", input_path, entry->d_name) < 0) { |
88ae485a JR |
983 | ERR("Failed to format path."); |
984 | continue; | |
985 | } | |
986 | ||
987 | if (stat(filename, &st)) { | |
988 | PERROR("stat"); | |
989 | continue; | |
990 | } | |
991 | ||
992 | if (S_ISDIR(st.st_mode)) { | |
a424227e MD |
993 | char output_subpath[PATH_MAX]; |
994 | char input_subpath[PATH_MAX]; | |
995 | ||
28ab034a | 996 | strncpy(output_subpath, output_path, sizeof(output_subpath)); |
a424227e | 997 | output_subpath[sizeof(output_subpath) - 1] = '\0'; |
28ab034a JG |
998 | strncat(output_subpath, |
999 | "/", | |
a424227e | 1000 | sizeof(output_subpath) - strlen(output_subpath) - 1); |
28ab034a JG |
1001 | strncat(output_subpath, |
1002 | entry->d_name, | |
a424227e MD |
1003 | sizeof(output_subpath) - strlen(output_subpath) - 1); |
1004 | ||
1005 | ret = mkdir(output_subpath, S_IRWXU | S_IRWXG); | |
1006 | if (ret) { | |
1007 | PERROR("mkdir"); | |
1008 | has_warning = 1; | |
1009 | goto end; | |
1010 | } | |
1011 | ||
28ab034a | 1012 | strncpy(input_subpath, input_path, sizeof(input_subpath)); |
a424227e | 1013 | input_subpath[sizeof(input_subpath) - 1] = '\0'; |
28ab034a JG |
1014 | strncat(input_subpath, |
1015 | "/", | |
a424227e | 1016 | sizeof(input_subpath) - strlen(input_subpath) - 1); |
28ab034a JG |
1017 | strncat(input_subpath, |
1018 | entry->d_name, | |
a424227e MD |
1019 | sizeof(input_subpath) - strlen(input_subpath) - 1); |
1020 | ||
28ab034a | 1021 | ret = extract_trace_recursive(output_subpath, input_subpath); |
29786dfa JG |
1022 | if (ret) { |
1023 | has_warning = 1; | |
1024 | } | |
88ae485a | 1025 | } else if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode)) { |
a424227e | 1026 | if (!strcmp(entry->d_name, "metadata")) { |
28ab034a | 1027 | ret = extract_one_trace(output_path, input_path); |
a424227e MD |
1028 | if (ret) { |
1029 | WARN("Error extracting trace '%s', continuing anyway.", | |
28ab034a | 1030 | input_path); |
a424227e MD |
1031 | has_warning = 1; |
1032 | } | |
1033 | } | |
88ae485a | 1034 | } else { |
d7ba1388 | 1035 | has_warning = 1; |
a424227e | 1036 | goto end; |
d7ba1388 MD |
1037 | } |
1038 | } | |
a424227e MD |
1039 | end: |
1040 | closeret = closedir(dir); | |
1041 | if (closeret) { | |
1042 | PERROR("closedir"); | |
1043 | } | |
d7ba1388 MD |
1044 | return has_warning; |
1045 | } | |
1046 | ||
28ab034a | 1047 | static int delete_dir_recursive(const char *path) |
d7ba1388 | 1048 | { |
afe4fd7c JR |
1049 | DIR *dir; |
1050 | int dir_fd, ret = 0, closeret; | |
88ae485a | 1051 | size_t path_len; |
d7ba1388 MD |
1052 | struct dirent *entry; |
1053 | ||
1054 | /* Open trace directory */ | |
afe4fd7c JR |
1055 | dir = opendir(path); |
1056 | if (!dir) { | |
1057 | PERROR("Cannot open '%s' path", path); | |
920a187e | 1058 | ret = -errno; |
28ab034a | 1059 | goto end_no_closedir; |
d7ba1388 | 1060 | } |
88ae485a JR |
1061 | |
1062 | path_len = strlen(path); | |
1063 | ||
afe4fd7c JR |
1064 | dir_fd = dirfd(dir); |
1065 | if (dir_fd < 0) { | |
d7ba1388 | 1066 | PERROR("dirfd"); |
920a187e JG |
1067 | ret = -errno; |
1068 | goto end; | |
d7ba1388 MD |
1069 | } |
1070 | ||
afe4fd7c | 1071 | while ((entry = readdir(dir))) { |
88ae485a JR |
1072 | struct stat st; |
1073 | size_t name_len; | |
1074 | char filename[PATH_MAX]; | |
1075 | ||
28ab034a | 1076 | if (!strcmp(entry->d_name, ".") || !strcmp(entry->d_name, "..")) { |
d7ba1388 | 1077 | continue; |
a424227e | 1078 | } |
88ae485a JR |
1079 | |
1080 | name_len = strlen(entry->d_name); | |
1081 | if (path_len + name_len + 2 > sizeof(filename)) { | |
1082 | ERR("Failed to remove file: path name too long (%s/%s)", | |
28ab034a JG |
1083 | path, |
1084 | entry->d_name); | |
88ae485a JR |
1085 | continue; |
1086 | } | |
1087 | ||
28ab034a | 1088 | if (snprintf(filename, sizeof(filename), "%s/%s", path, entry->d_name) < 0) { |
88ae485a JR |
1089 | ERR("Failed to format path."); |
1090 | continue; | |
1091 | } | |
1092 | ||
1093 | if (stat(filename, &st)) { | |
1094 | PERROR("stat"); | |
1095 | continue; | |
1096 | } | |
1097 | ||
1098 | if (S_ISDIR(st.st_mode)) { | |
64803277 | 1099 | char *subpath = calloc<char>(PATH_MAX); |
afe4fd7c JR |
1100 | |
1101 | if (!subpath) { | |
1102 | PERROR("zmalloc path"); | |
1103 | ret = -1; | |
1104 | goto end; | |
1105 | } | |
1106 | strncpy(subpath, path, PATH_MAX); | |
1107 | subpath[PATH_MAX - 1] = '\0'; | |
28ab034a JG |
1108 | strncat(subpath, "/", PATH_MAX - strlen(subpath) - 1); |
1109 | strncat(subpath, entry->d_name, PATH_MAX - strlen(subpath) - 1); | |
afe4fd7c JR |
1110 | |
1111 | ret = delete_dir_recursive(subpath); | |
1112 | free(subpath); | |
1113 | if (ret) { | |
83f4233d | 1114 | /* Error occurred, abort traversal. */ |
afe4fd7c JR |
1115 | goto end; |
1116 | } | |
88ae485a | 1117 | } else if (S_ISREG(st.st_mode)) { |
afe4fd7c JR |
1118 | ret = unlinkat(dir_fd, entry->d_name, 0); |
1119 | if (ret) { | |
1120 | PERROR("Unlinking '%s'", entry->d_name); | |
1121 | goto end; | |
1122 | } | |
88ae485a | 1123 | } else { |
d7ba1388 MD |
1124 | ret = -EINVAL; |
1125 | goto end; | |
1126 | } | |
1127 | } | |
1128 | end: | |
afe4fd7c JR |
1129 | if (!ret) { |
1130 | ret = rmdir(path); | |
1131 | if (ret) { | |
1132 | PERROR("rmdir '%s'", path); | |
1133 | } | |
1134 | } | |
1135 | closeret = closedir(dir); | |
d7ba1388 MD |
1136 | if (closeret) { |
1137 | PERROR("closedir"); | |
1138 | } | |
ef6fc488 | 1139 | end_no_closedir: |
d7ba1388 MD |
1140 | return ret; |
1141 | } | |
1142 | ||
28ab034a | 1143 | static int view_trace(const char *trace_path, char *viewer_path) |
d7ba1388 MD |
1144 | { |
1145 | pid_t pid; | |
1146 | ||
1147 | pid = fork(); | |
1148 | if (pid < 0) { | |
1149 | /* Error */ | |
1150 | PERROR("fork"); | |
1151 | return -1; | |
1152 | } else if (pid > 0) { | |
1153 | /* Parent */ | |
1154 | int status; | |
1155 | ||
1156 | pid = waitpid(pid, &status, 0); | |
1157 | if (pid < 0 || !WIFEXITED(status)) { | |
1158 | return -1; | |
1159 | } | |
1160 | } else { | |
1161 | /* Child */ | |
1162 | int ret; | |
1163 | ||
53866dcb | 1164 | ret = spawn_viewer(trace_path, viewer_path, false); |
d7ba1388 | 1165 | if (ret) { |
d7ba1388 MD |
1166 | exit(EXIT_FAILURE); |
1167 | } | |
53866dcb FD |
1168 | /* Never reached */ |
1169 | exit(EXIT_SUCCESS); | |
d7ba1388 MD |
1170 | } |
1171 | return 0; | |
1172 | } | |
1173 | ||
1174 | /* | |
1175 | * main | |
1176 | */ | |
1177 | int main(int argc, char *argv[]) | |
1178 | { | |
aa25d686 JG |
1179 | int ret; |
1180 | bool has_warning = false; | |
cd9adb8b | 1181 | const char *output_path = nullptr; |
d7ba1388 MD |
1182 | char tmppath[] = "/tmp/lttng-crash-XXXXXX"; |
1183 | ||
1184 | progname = argv[0] ? argv[0] : "lttng-crash"; | |
1185 | ||
1186 | ret = parse_args(argc, argv); | |
1187 | if (ret > 0) { | |
aa25d686 | 1188 | goto end; |
d7ba1388 | 1189 | } else if (ret < 0) { |
aa25d686 JG |
1190 | has_warning = true; |
1191 | goto end; | |
d7ba1388 MD |
1192 | } |
1193 | ||
1194 | if (opt_output_path) { | |
1195 | output_path = opt_output_path; | |
1196 | ret = mkdir(output_path, S_IRWXU | S_IRWXG); | |
1197 | if (ret) { | |
1198 | PERROR("mkdir"); | |
aa25d686 JG |
1199 | has_warning = true; |
1200 | goto end; | |
d7ba1388 MD |
1201 | } |
1202 | } else { | |
1203 | output_path = mkdtemp(tmppath); | |
1204 | if (!output_path) { | |
1205 | PERROR("mkdtemp"); | |
aa25d686 JG |
1206 | has_warning = true; |
1207 | goto end; | |
d7ba1388 MD |
1208 | } |
1209 | } | |
1210 | ||
40b4fee7 | 1211 | ret = extract_trace_recursive(output_path, the_input_path); |
d7ba1388 | 1212 | if (ret < 0) { |
aa25d686 JG |
1213 | has_warning = true; |
1214 | goto end; | |
d7ba1388 | 1215 | } else if (ret > 0) { |
aa25d686 JG |
1216 | /* extract_trace_recursive reported a warning. */ |
1217 | has_warning = true; | |
d7ba1388 MD |
1218 | } |
1219 | if (!opt_output_path) { | |
1220 | /* View trace */ | |
53866dcb | 1221 | ret = view_trace(output_path, opt_viewer_path); |
aa25d686 JG |
1222 | if (ret) { |
1223 | has_warning = true; | |
1224 | } | |
d7ba1388 | 1225 | /* unlink temporary trace */ |
afe4fd7c | 1226 | ret = delete_dir_recursive(output_path); |
aa25d686 JG |
1227 | if (ret) { |
1228 | has_warning = true; | |
1229 | } | |
d7ba1388 | 1230 | } |
aa25d686 JG |
1231 | end: |
1232 | exit(has_warning ? EXIT_FAILURE : EXIT_SUCCESS); | |
d7ba1388 | 1233 | } |