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add trace verification at opening
[lttv.git] / ltt / branches / poly / ltt / tracefile.c
1 /* This file is part of the Linux Trace Toolkit viewer
2 * Copyright (C) 2005 Mathieu Desnoyers
3 *
4 * Complete rewrite from the original version made by XangXiu Yang.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License Version 2 as
8 * published by the Free Software Foundation;
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
18 * MA 02111-1307, USA.
19 */
20
21 #ifdef HAVE_CONFIG_H
22 #include <config.h>
23 #endif
24
25 #include <stdio.h>
26 #include <fcntl.h>
27 #include <string.h>
28 #include <dirent.h>
29 #include <sys/stat.h>
30 #include <sys/types.h>
31 #include <errno.h>
32 #include <unistd.h>
33 #include <math.h>
34 #include <glib.h>
35 #include <malloc.h>
36 #include <sys/mman.h>
37
38 // For realpath
39 #include <limits.h>
40 #include <stdlib.h>
41
42
43 #include "parser.h"
44 #include <ltt/ltt.h>
45 #include "ltt-private.h"
46 #include <ltt/trace.h>
47 #include <ltt/facility.h>
48 #include <ltt/event.h>
49 #include <ltt/type.h>
50 #include <ltt/ltt-types.h>
51
52
53 /* Facility names used in this file */
54
55 GQuark LTT_FACILITY_NAME_HEARTBEAT,
56 LTT_EVENT_NAME_HEARTBEAT;
57 GQuark LTT_TRACEFILE_NAME_FACILITIES;
58
59 #ifndef g_open
60 #define g_open open
61 #endif
62
63
64 #define __UNUSED__ __attribute__((__unused__))
65
66 #define g_info(format...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_INFO, format)
67
68 #ifndef g_debug
69 #define g_debug(format...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, format)
70 #endif
71
72 #define g_close close
73
74 /* Those macros must be called from within a function where page_size is a known
75 * variable */
76 #define PAGE_MASK (~(page_size-1))
77 #define PAGE_ALIGN(addr) (((addr)+page_size-1)&PAGE_MASK)
78
79 /* set the offset of the fields belonging to the event,
80 need the information of the archecture */
81 void set_fields_offsets(LttTracefile *tf, LttEventType *event_type);
82 //size_t get_fields_offsets(LttTracefile *tf, LttEventType *event_type, void *data);
83
84 /* get the size of the field type according to
85 * The facility size information. */
86 static inline void preset_field_type_size(LttTracefile *tf,
87 LttEventType *event_type,
88 off_t offset_root, off_t offset_parent,
89 enum field_status *fixed_root, enum field_status *fixed_parent,
90 LttField *field);
91
92 /* map a fixed size or a block information from the file (fd) */
93 static gint map_block(LttTracefile * tf, guint block_num);
94
95 /* calculate nsec per cycles for current block */
96 static double calc_nsecs_per_cycle(LttTracefile * t);
97
98 /* go to the next event */
99 static int ltt_seek_next_event(LttTracefile *tf);
100
101 void ltt_update_event_size(LttTracefile *tf);
102
103 #if 0
104 /* Functions to parse system.xml file (using glib xml parser) */
105 static void parser_start_element (GMarkupParseContext __UNUSED__ *context,
106 const gchar *element_name,
107 const gchar **attribute_names,
108 const gchar **attribute_values,
109 gpointer user_data,
110 GError **error)
111 {
112 int i=0;
113 LttSystemDescription* des = (LttSystemDescription* )user_data;
114 if(strcmp("system", element_name)){
115 *error = g_error_new(G_MARKUP_ERROR,
116 G_LOG_LEVEL_WARNING,
117 "This is not system.xml file");
118 return;
119 }
120
121 while(attribute_names[i]){
122 if(strcmp("node_name", attribute_names[i])==0){
123 des->node_name = g_strdup(attribute_values[i]);
124 }else if(strcmp("domainname", attribute_names[i])==0){
125 des->domain_name = g_strdup(attribute_values[i]);
126 }else if(strcmp("cpu", attribute_names[i])==0){
127 des->nb_cpu = atoi(attribute_values[i]);
128 }else if(strcmp("arch_size", attribute_names[i])==0){
129 if(strcmp(attribute_values[i],"LP32") == 0) des->size = LTT_LP32;
130 else if(strcmp(attribute_values[i],"ILP32") == 0) des->size = LTT_ILP32;
131 else if(strcmp(attribute_values[i],"LP64") == 0) des->size = LTT_LP64;
132 else if(strcmp(attribute_values[i],"ILP64") == 0) des->size = LTT_ILP64;
133 else if(strcmp(attribute_values[i],"UNKNOWN") == 0) des->size = LTT_UNKNOWN;
134 }else if(strcmp("endian", attribute_names[i])==0){
135 if(strcmp(attribute_values[i],"LITTLE_ENDIAN") == 0)
136 des->endian = LTT_LITTLE_ENDIAN;
137 else if(strcmp(attribute_values[i],"BIG_ENDIAN") == 0)
138 des->endian = LTT_BIG_ENDIAN;
139 }else if(strcmp("kernel_name", attribute_names[i])==0){
140 des->kernel_name = g_strdup(attribute_values[i]);
141 }else if(strcmp("kernel_release", attribute_names[i])==0){
142 des->kernel_release = g_strdup(attribute_values[i]);
143 }else if(strcmp("kernel_version", attribute_names[i])==0){
144 des->kernel_version = g_strdup(attribute_values[i]);
145 }else if(strcmp("machine", attribute_names[i])==0){
146 des->machine = g_strdup(attribute_values[i]);
147 }else if(strcmp("processor", attribute_names[i])==0){
148 des->processor = g_strdup(attribute_values[i]);
149 }else if(strcmp("hardware_platform", attribute_names[i])==0){
150 des->hardware_platform = g_strdup(attribute_values[i]);
151 }else if(strcmp("operating_system", attribute_names[i])==0){
152 des->operating_system = g_strdup(attribute_values[i]);
153 }else if(strcmp("ltt_major_version", attribute_names[i])==0){
154 des->ltt_major_version = atoi(attribute_values[i]);
155 }else if(strcmp("ltt_minor_version", attribute_names[i])==0){
156 des->ltt_minor_version = atoi(attribute_values[i]);
157 }else if(strcmp("ltt_block_size", attribute_names[i])==0){
158 des->ltt_block_size = atoi(attribute_values[i]);
159 }else{
160 *error = g_error_new(G_MARKUP_ERROR,
161 G_LOG_LEVEL_WARNING,
162 "Not a valid attribute");
163 return;
164 }
165 i++;
166 }
167 }
168
169 static void parser_characters (GMarkupParseContext __UNUSED__ *context,
170 const gchar *text,
171 gsize __UNUSED__ text_len,
172 gpointer user_data,
173 GError __UNUSED__ **error)
174 {
175 LttSystemDescription* des = (LttSystemDescription* )user_data;
176 des->description = g_strdup(text);
177 }
178 #endif //0
179 LttFacility *ltt_trace_get_facility_by_num(LttTrace *t,
180 guint num)
181 {
182 g_assert(num < t->facilities_by_num->len);
183
184 return &g_array_index(t->facilities_by_num, LttFacility, num);
185
186 }
187
188 guint ltt_trace_get_num_cpu(LttTrace *t)
189 {
190 return t->num_cpu;
191 }
192
193
194 /*****************************************************************************
195 *Function name
196 * ltt_tracefile_open : open a trace file, construct a LttTracefile
197 *Input params
198 * t : the trace containing the tracefile
199 * fileName : path name of the trace file
200 * tf : the tracefile structure
201 *Return value
202 * : 0 for success, -1 otherwise.
203 ****************************************************************************/
204
205 gint ltt_tracefile_open(LttTrace *t, gchar * fileName, LttTracefile *tf)
206 {
207 struct stat lTDFStat; /* Trace data file status */
208 struct ltt_block_start_header *header;
209 int page_size = getpagesize();
210
211 //open the file
212 tf->long_name = g_quark_from_string(fileName);
213 tf->trace = t;
214 tf->fd = open(fileName, O_RDONLY);
215 if(tf->fd < 0){
216 g_warning("Unable to open input data file %s\n", fileName);
217 goto end;
218 }
219
220 // Get the file's status
221 if(fstat(tf->fd, &lTDFStat) < 0){
222 g_warning("Unable to get the status of the input data file %s\n", fileName);
223 goto close_file;
224 }
225
226 // Is the file large enough to contain a trace
227 if(lTDFStat.st_size < (off_t)(sizeof(struct ltt_block_start_header))){
228 g_print("The input data file %s does not contain a trace\n", fileName);
229 goto close_file;
230 }
231
232 /* Temporarily map the buffer start header to get trace information */
233 /* Multiple of pages aligned head */
234 tf->buffer.head = mmap(0,
235 PAGE_ALIGN(sizeof(struct ltt_block_start_header)), PROT_READ,
236 MAP_PRIVATE, tf->fd, 0);
237 if(tf->buffer.head == MAP_FAILED) {
238 perror("Error in allocating memory for buffer of tracefile");
239 goto close_file;
240 }
241 g_assert( ( (guint)tf->buffer.head&(8-1) ) == 0); // make sure it's aligned.
242
243 header = (struct ltt_block_start_header*)tf->buffer.head;
244
245 if(header->trace.magic_number == LTT_MAGIC_NUMBER)
246 tf->reverse_bo = 0;
247 else if(header->trace.magic_number == LTT_REV_MAGIC_NUMBER)
248 tf->reverse_bo = 1;
249 else /* invalid magic number, bad tracefile ! */
250 goto unmap_file;
251
252 //store the size of the file
253 tf->file_size = lTDFStat.st_size;
254 tf->buf_size = ltt_get_uint32(LTT_GET_BO(tf), &header->buf_size);
255 tf->num_blocks = tf->file_size / tf->buf_size;
256
257 if(munmap(tf->buffer.head,
258 PAGE_ALIGN(sizeof(struct ltt_block_start_header)))) {
259 g_warning("unmap size : %u\n",
260 PAGE_ALIGN(sizeof(struct ltt_block_start_header)));
261 perror("munmap error");
262 g_assert(0);
263 }
264 tf->buffer.head = NULL;
265
266 //read the first block
267 if(map_block(tf,0)) {
268 perror("Cannot map block for tracefile");
269 goto close_file;
270 }
271
272 return 0;
273
274 /* Error */
275 unmap_file:
276 if(munmap(tf->buffer.head,
277 PAGE_ALIGN(sizeof(struct ltt_block_start_header)))) {
278 g_warning("unmap size : %u\n",
279 PAGE_ALIGN(sizeof(struct ltt_block_start_header)));
280 perror("munmap error");
281 g_assert(0);
282 }
283 close_file:
284 close(tf->fd);
285 end:
286 return -1;
287 }
288
289 LttTrace *ltt_tracefile_get_trace(LttTracefile *tf)
290 {
291 return tf->trace;
292 }
293
294 #if 0
295 /*****************************************************************************
296 *Open control and per cpu tracefiles
297 ****************************************************************************/
298
299 void ltt_tracefile_open_cpu(LttTrace *t, gchar * tracefile_name)
300 {
301 LttTracefile * tf;
302 tf = ltt_tracefile_open(t,tracefile_name);
303 if(!tf) return;
304 t->per_cpu_tracefile_number++;
305 g_ptr_array_add(t->per_cpu_tracefiles, tf);
306 }
307
308 gint ltt_tracefile_open_control(LttTrace *t, gchar * control_name)
309 {
310 LttTracefile * tf;
311 LttEvent ev;
312 LttFacility * f;
313 void * pos;
314 FacilityLoad fLoad;
315 unsigned int i;
316
317 tf = ltt_tracefile_open(t,control_name);
318 if(!tf) {
319 g_warning("ltt_tracefile_open_control : bad file descriptor");
320 return -1;
321 }
322 t->control_tracefile_number++;
323 g_ptr_array_add(t->control_tracefiles,tf);
324
325 //parse facilities tracefile to get base_id
326 if(strcmp(&control_name[strlen(control_name)-10],"facilities") ==0){
327 while(1){
328 if(!ltt_tracefile_read(tf,&ev)) return 0; // end of file
329
330 if(ev.event_id == TRACE_FACILITY_LOAD){
331 pos = ev.data;
332 fLoad.name = (gchar*)pos;
333 fLoad.checksum = *(LttChecksum*)(pos + strlen(fLoad.name));
334 fLoad.base_code = *(guint32 *)(pos + strlen(fLoad.name) + sizeof(LttChecksum));
335
336 for(i=0;i<t->facility_number;i++){
337 f = (LttFacility*)g_ptr_array_index(t->facilities,i);
338 if(strcmp(f->name,fLoad.name)==0 && fLoad.checksum==f->checksum){
339 f->base_id = fLoad.base_code;
340 break;
341 }
342 }
343 if(i==t->facility_number) {
344 g_warning("Facility: %s, checksum: %u is not found",
345 fLoad.name,(unsigned int)fLoad.checksum);
346 return -1;
347 }
348 }else if(ev.event_id == TRACE_BLOCK_START){
349 continue;
350 }else if(ev.event_id == TRACE_BLOCK_END){
351 break;
352 }else {
353 g_warning("Not valid facilities trace file");
354 return -1;
355 }
356 }
357 }
358 return 0;
359 }
360 #endif //0
361
362 /*****************************************************************************
363 *Function name
364 * ltt_tracefile_close: close a trace file,
365 *Input params
366 * t : tracefile which will be closed
367 ****************************************************************************/
368
369 void ltt_tracefile_close(LttTracefile *t)
370 {
371 int page_size = getpagesize();
372
373 if(t->buffer.head != NULL)
374 if(munmap(t->buffer.head, PAGE_ALIGN(t->buf_size))) {
375 g_warning("unmap size : %u\n",
376 PAGE_ALIGN(t->buf_size));
377 perror("munmap error");
378 g_assert(0);
379 }
380
381 close(t->fd);
382 }
383
384
385 /*****************************************************************************
386 *Get system information
387 ****************************************************************************/
388 #if 0
389 gint getSystemInfo(LttSystemDescription* des, gchar * pathname)
390 {
391 int fd;
392 GIOChannel *iochan;
393 gchar *buf = NULL;
394 gsize length;
395
396 GMarkupParseContext * context;
397 GError * error = NULL;
398 GMarkupParser markup_parser =
399 {
400 parser_start_element,
401 NULL,
402 parser_characters,
403 NULL, /* passthrough */
404 NULL /* error */
405 };
406
407 fd = g_open(pathname, O_RDONLY, 0);
408 if(fd == -1){
409 g_warning("Can not open file : %s\n", pathname);
410 return -1;
411 }
412
413 iochan = g_io_channel_unix_new(fd);
414
415 context = g_markup_parse_context_new(&markup_parser, 0, des,NULL);
416
417 //while(fgets(buf,DIR_NAME_SIZE, fp) != NULL){
418 while(g_io_channel_read_line(iochan, &buf, &length, NULL, &error)
419 != G_IO_STATUS_EOF) {
420
421 if(error != NULL) {
422 g_warning("Can not read xml file: \n%s\n", error->message);
423 g_error_free(error);
424 }
425 if(!g_markup_parse_context_parse(context, buf, length, &error)){
426 if(error != NULL) {
427 g_warning("Can not parse xml file: \n%s\n", error->message);
428 g_error_free(error);
429 }
430 g_markup_parse_context_free(context);
431
432 g_io_channel_shutdown(iochan, FALSE, &error); /* No flush */
433 if(error != NULL) {
434 g_warning("Can not close file: \n%s\n", error->message);
435 g_error_free(error);
436 }
437
438 close(fd);
439 return -1;
440 }
441 }
442 g_markup_parse_context_free(context);
443
444 g_io_channel_shutdown(iochan, FALSE, &error); /* No flush */
445 if(error != NULL) {
446 g_warning("Can not close file: \n%s\n", error->message);
447 g_error_free(error);
448 }
449
450 g_close(fd);
451
452 g_free(buf);
453 return 0;
454 }
455 #endif //0
456
457 /*****************************************************************************
458 *The following functions get facility/tracefile information
459 ****************************************************************************/
460 #if 0
461 gint getFacilityInfo(LttTrace *t, gchar* eventdefs)
462 {
463 GDir * dir;
464 const gchar * name;
465 unsigned int i,j;
466 LttFacility * f;
467 LttEventType * et;
468 gchar fullname[DIR_NAME_SIZE];
469 GError * error = NULL;
470
471 dir = g_dir_open(eventdefs, 0, &error);
472
473 if(error != NULL) {
474 g_warning("Can not open directory: %s, %s\n", eventdefs, error->message);
475 g_error_free(error);
476 return -1;
477 }
478
479 while((name = g_dir_read_name(dir)) != NULL){
480 if(!g_pattern_match_simple("*.xml", name)) continue;
481 strcpy(fullname,eventdefs);
482 strcat(fullname,name);
483 ltt_facility_open(t,fullname);
484 }
485 g_dir_close(dir);
486
487 for(j=0;j<t->facility_number;j++){
488 f = (LttFacility*)g_ptr_array_index(t->facilities, j);
489 for(i=0; i<f->event_number; i++){
490 et = f->events[i];
491 setFieldsOffset(NULL, et, NULL, t);
492 }
493 }
494 return 0;
495 }
496 #endif //0
497
498 /*****************************************************************************
499 *A trace is specified as a pathname to the directory containing all the
500 *associated data (control tracefiles, per cpu tracefiles, event
501 *descriptions...).
502 *
503 *When a trace is closed, all the associated facilities, types and fields
504 *are released as well.
505 */
506
507
508 /****************************************************************************
509 * get_absolute_pathname
510 *
511 * return the unique pathname in the system
512 *
513 * MD : Fixed this function so it uses realpath, dealing well with
514 * forgotten cases (.. were not used correctly before).
515 *
516 ****************************************************************************/
517 void get_absolute_pathname(const gchar *pathname, gchar * abs_pathname)
518 {
519 abs_pathname[0] = '\0';
520
521 if ( realpath (pathname, abs_pathname) != NULL)
522 return;
523 else
524 {
525 /* error, return the original path unmodified */
526 strcpy(abs_pathname, pathname);
527 return;
528 }
529 return;
530 }
531
532 /* Search for something like : .*_.*
533 *
534 * The left side is the name, the right side is the number.
535 */
536
537 int get_tracefile_name_number(const gchar *raw_name,
538 GQuark *name,
539 guint *num)
540 {
541 guint raw_name_len = strlen(raw_name);
542 gchar char_name[PATH_MAX];
543 int i;
544 int underscore_pos;
545 long int cpu_num;
546 gchar *endptr;
547
548 for(i=raw_name_len-1;i>=0;i--) {
549 if(raw_name[i] == '_') break;
550 }
551 if(i==0) /* Either not found or name length is 0 */
552 return -1;
553 underscore_pos = i;
554
555 cpu_num = strtol(raw_name+underscore_pos+1, &endptr, 10);
556
557 if(endptr == raw_name+underscore_pos+1)
558 return -1; /* No digit */
559 if(cpu_num == LONG_MIN || cpu_num == LONG_MAX)
560 return -1; /* underflow / overflow */
561
562 strncpy(char_name, raw_name, underscore_pos);
563
564 char_name[underscore_pos] = '\0';
565
566 *name = g_quark_from_string(char_name);
567 *num = cpu_num;
568
569 return 0;
570 }
571
572
573 GData **ltt_trace_get_tracefiles_groups(LttTrace *trace)
574 {
575 return &trace->tracefiles;
576 }
577
578
579 void compute_tracefile_group(GQuark key_id,
580 GArray *group,
581 struct compute_tracefile_group_args *args)
582 {
583 int i;
584 LttTracefile *tf;
585
586 for(i=0; i<group->len; i++) {
587 tf = &g_array_index (group, LttTracefile, i);
588 if(tf->cpu_online)
589 args->func(tf, args->func_args);
590 }
591 }
592
593
594 void ltt_tracefile_group_destroy(gpointer data)
595 {
596 GArray *group = (GArray *)data;
597 int i;
598 LttTracefile *tf;
599
600 for(i=0; i<group->len; i++) {
601 tf = &g_array_index (group, LttTracefile, i);
602 if(tf->cpu_online)
603 ltt_tracefile_close(tf);
604 }
605 g_array_free(group, TRUE);
606 }
607
608 gboolean ltt_tracefile_group_has_cpu_online(gpointer data)
609 {
610 GArray *group = (GArray *)data;
611 int i;
612 LttTracefile *tf;
613
614 for(i=0; i<group->len; i++) {
615 tf = &g_array_index (group, LttTracefile, i);
616 if(tf->cpu_online) return 1;
617 }
618 return 0;
619 }
620
621
622 /* Open each tracefile under a specific directory. Put them in a
623 * GData : permits to access them using their tracefile group pathname.
624 * i.e. access control/modules tracefile group by index :
625 * "control/module".
626 *
627 * relative path is the path relative to the trace root
628 * root path is the full path
629 *
630 * A tracefile group is simply an array where all the per cpu tracefiles sits.
631 */
632
633 static int open_tracefiles(LttTrace *trace, gchar *root_path,
634 gchar *relative_path)
635 {
636 DIR *dir = opendir(root_path);
637 struct dirent *entry;
638 struct stat stat_buf;
639 int ret;
640
641 gchar path[PATH_MAX];
642 int path_len;
643 gchar *path_ptr;
644
645 int rel_path_len;
646 gchar rel_path[PATH_MAX];
647 gchar *rel_path_ptr;
648 LttTracefile tmp_tf;
649
650 if(dir == NULL) {
651 perror(root_path);
652 return ENOENT;
653 }
654
655 strncpy(path, root_path, PATH_MAX-1);
656 path_len = strlen(path);
657 path[path_len] = '/';
658 path_len++;
659 path_ptr = path + path_len;
660
661 strncpy(rel_path, relative_path, PATH_MAX-1);
662 rel_path_len = strlen(rel_path);
663 rel_path[rel_path_len] = '/';
664 rel_path_len++;
665 rel_path_ptr = rel_path + rel_path_len;
666
667 while((entry = readdir(dir)) != NULL) {
668
669 if(entry->d_name[0] == '.') continue;
670
671 strncpy(path_ptr, entry->d_name, PATH_MAX - path_len);
672 strncpy(rel_path_ptr, entry->d_name, PATH_MAX - rel_path_len);
673
674 ret = stat(path, &stat_buf);
675 if(ret == -1) {
676 perror(path);
677 continue;
678 }
679
680 g_debug("Tracefile file or directory : %s\n", path);
681
682 if(S_ISDIR(stat_buf.st_mode)) {
683
684 g_debug("Entering subdirectory...\n");
685 ret = open_tracefiles(trace, path, rel_path);
686 if(ret < 0) continue;
687 } else if(S_ISREG(stat_buf.st_mode)) {
688 GQuark name;
689 guint num;
690 GArray *group;
691
692 if(get_tracefile_name_number(rel_path, &name, &num))
693 continue; /* invalid name */
694
695 g_debug("Opening file.\n");
696 if(ltt_tracefile_open(trace, path, &tmp_tf)) {
697 g_info("Error opening tracefile %s", path);
698
699 continue; /* error opening the tracefile : bad magic number ? */
700 }
701
702 g_debug("Tracefile name is %s and number is %u",
703 g_quark_to_string(name), num);
704
705 tmp_tf.cpu_online = 1;
706 tmp_tf.cpu_num = num;
707 tmp_tf.name = name;
708
709 group = g_datalist_id_get_data(&trace->tracefiles, name);
710 if(group == NULL) {
711 /* Elements are automatically cleared when the array is allocated.
712 * It makes the cpu_online variable set to 0 : cpu offline, by default.
713 */
714 group = g_array_sized_new (FALSE, TRUE, sizeof(LttTracefile), 10);
715 g_datalist_id_set_data_full(&trace->tracefiles, name,
716 group, ltt_tracefile_group_destroy);
717 }
718
719 /* Add the per cpu tracefile to the named group */
720 unsigned int old_len = group->len;
721 if(num+1 > old_len)
722 group = g_array_set_size(group, num+1);
723 g_array_index (group, LttTracefile, num) = tmp_tf;
724
725 }
726 }
727
728 closedir(dir);
729
730 return 0;
731 }
732
733 /* ltt_get_facility_description
734 *
735 * Opens the trace corresponding to the requested facility (identified by fac_id
736 * and checksum).
737 *
738 * The name searched is : %trace root%/eventdefs/facname_checksum.xml
739 *
740 * Returns 0 on success, or 1 on failure.
741 */
742
743 static int ltt_get_facility_description(LttFacility *f,
744 LttTrace *t,
745 LttTracefile *fac_tf)
746 {
747 char desc_file_name[PATH_MAX];
748 const gchar *text;
749 guint textlen;
750 gint err;
751
752 text = g_quark_to_string(t->pathname);
753 textlen = strlen(text);
754
755 if(textlen >= PATH_MAX) goto name_error;
756 strcpy(desc_file_name, text);
757
758 text = "/eventdefs/";
759 textlen+=strlen(text);
760 if(textlen >= PATH_MAX) goto name_error;
761 strcat(desc_file_name, text);
762
763 text = g_quark_to_string(f->name);
764 textlen+=strlen(text);
765 if(textlen >= PATH_MAX) goto name_error;
766 strcat(desc_file_name, text);
767
768 text = "_";
769 textlen+=strlen(text);
770 if(textlen >= PATH_MAX) goto name_error;
771 strcat(desc_file_name, text);
772
773 err = snprintf(desc_file_name+textlen, PATH_MAX-textlen-1,
774 "%u", f->checksum);
775 if(err < 0) goto name_error;
776
777 textlen=strlen(desc_file_name);
778
779 text = ".xml";
780 textlen+=strlen(text);
781 if(textlen >= PATH_MAX) goto name_error;
782 strcat(desc_file_name, text);
783
784 err = ltt_facility_open(f, t, desc_file_name);
785 if(err) goto facility_error;
786
787 return 0;
788
789 facility_error:
790 name_error:
791 return 1;
792 }
793
794 static void ltt_fac_ids_destroy(gpointer data)
795 {
796 GArray *fac_ids = (GArray *)data;
797
798 g_array_free(fac_ids, TRUE);
799 }
800
801
802 /* Presumes the tracefile is already seeked at the beginning. It makes sense,
803 * because it must be done just after the opening */
804 static int ltt_process_facility_tracefile(LttTracefile *tf)
805 {
806 int err;
807 LttFacility *fac;
808 GArray *fac_ids;
809 guint i;
810 LttEventType *et;
811
812 while(1) {
813 err = ltt_tracefile_read_seek(tf);
814 if(err == EPERM) goto seek_error;
815 else if(err == ERANGE) break; /* End of tracefile */
816
817 err = ltt_tracefile_read_update_event(tf);
818 if(err) goto update_error;
819
820 /* We are on a facility load/or facility unload/ or heartbeat event */
821 /* The rules are :
822 * * facility 0 is hardcoded : this is the core facility. It will be shown
823 * in the facility array though, and is shown as "loaded builtin" in the
824 * trace.
825 * It contains event :
826 * 0 : facility load
827 * 1 : facility unload
828 * 2 : state dump facility load
829 * 3 : heartbeat
830 */
831 if(tf->event.facility_id != LTT_FACILITY_CORE) {
832 /* Should only contain core facility */
833 g_warning("Error in processing facility file %s, "
834 "should not contain facility id %u.", g_quark_to_string(tf->name),
835 tf->event.facility_id);
836 err = EPERM;
837 goto fac_id_error;
838 } else {
839
840 struct LttFacilityLoad *fac_load_data;
841 struct LttStateDumpFacilityLoad *fac_state_dump_load_data;
842 char *fac_name;
843
844 // FIXME align
845 switch((enum ltt_core_events)tf->event.event_id) {
846 case LTT_EVENT_FACILITY_LOAD:
847 fac_name = (char*)(tf->event.data);
848 g_debug("Doing LTT_EVENT_FACILITY_LOAD of facility %s",
849 fac_name);
850 fac_load_data =
851 (struct LttFacilityLoad *)
852 (tf->event.data + strlen(fac_name) + 1);
853 fac = &g_array_index (tf->trace->facilities_by_num, LttFacility,
854 ltt_get_uint32(LTT_GET_BO(tf), &fac_load_data->id));
855 g_assert(fac->exists == 0);
856 fac->name = g_quark_from_string(fac_name);
857 fac->checksum = ltt_get_uint32(LTT_GET_BO(tf),
858 &fac_load_data->checksum);
859 fac->id = ltt_get_uint32(LTT_GET_BO(tf), &fac_load_data->id);
860 fac->pointer_size = ltt_get_uint32(LTT_GET_BO(tf),
861 &fac_load_data->pointer_size);
862 fac->long_size = ltt_get_uint32(LTT_GET_BO(tf),
863 &fac_load_data->long_size);
864 fac->size_t_size = ltt_get_uint32(LTT_GET_BO(tf),
865 &fac_load_data->size_t_size);
866 fac->alignment = ltt_get_uint32(LTT_GET_BO(tf),
867 &fac_load_data->alignment);
868
869 if(ltt_get_facility_description(fac, tf->trace, tf))
870 continue; /* error opening description */
871
872 fac->trace = tf->trace;
873
874 /* Preset the field offsets */
875 for(i=0; i<fac->events->len; i++){
876 et = &g_array_index(fac->events, LttEventType, i);
877 set_fields_offsets(tf, et);
878 }
879
880 fac->exists = 1;
881
882 fac_ids = g_datalist_id_get_data(&tf->trace->facilities_by_name,
883 fac->name);
884 if(fac_ids == NULL) {
885 fac_ids = g_array_sized_new (FALSE, TRUE, sizeof(guint), 1);
886 g_datalist_id_set_data_full(&tf->trace->facilities_by_name,
887 fac->name,
888 fac_ids, ltt_fac_ids_destroy);
889 }
890 g_array_append_val(fac_ids, fac->id);
891
892 break;
893 case LTT_EVENT_FACILITY_UNLOAD:
894 g_debug("Doing LTT_EVENT_FACILITY_UNLOAD");
895 /* We don't care about unload : facilities ID are valid for the whole
896 * trace. They simply won't be used after the unload. */
897 break;
898 case LTT_EVENT_STATE_DUMP_FACILITY_LOAD:
899 fac_name = (char*)(tf->event.data);
900 g_debug("Doing LTT_EVENT_STATE_DUMP_FACILITY_LOAD of facility %s",
901 fac_name);
902 fac_state_dump_load_data =
903 (struct LttStateDumpFacilityLoad *)
904 (tf->event.data + strlen(fac_name) + 1);
905 fac = &g_array_index (tf->trace->facilities_by_num, LttFacility,
906 ltt_get_uint32(LTT_GET_BO(tf), &fac_state_dump_load_data->id));
907 g_assert(fac->exists == 0);
908 fac->name = g_quark_from_string(fac_name);
909 fac->checksum = ltt_get_uint32(LTT_GET_BO(tf),
910 &fac_state_dump_load_data->checksum);
911 fac->id = fac_state_dump_load_data->id;
912 fac->pointer_size = ltt_get_uint32(LTT_GET_BO(tf),
913 &fac_state_dump_load_data->pointer_size);
914 fac->long_size = ltt_get_uint32(LTT_GET_BO(tf),
915 &fac_state_dump_load_data->long_size);
916 fac->size_t_size = ltt_get_uint32(LTT_GET_BO(tf),
917 &fac_state_dump_load_data->size_t_size);
918 fac->alignment = ltt_get_uint32(LTT_GET_BO(tf),
919 &fac_state_dump_load_data->alignment);
920 if(ltt_get_facility_description(fac, tf->trace, tf))
921 continue; /* error opening description */
922
923 fac->trace = tf->trace;
924
925 /* Preset the field offsets */
926 for(i=0; i<fac->events->len; i++){
927 et = &g_array_index(fac->events, LttEventType, i);
928 set_fields_offsets(tf, et);
929 }
930
931 fac->exists = 1;
932
933 fac_ids = g_datalist_id_get_data(&tf->trace->facilities_by_name,
934 fac->name);
935 if(fac_ids == NULL) {
936 fac_ids = g_array_sized_new (FALSE, TRUE, sizeof(guint), 1);
937 g_datalist_id_set_data_full(&tf->trace->facilities_by_name,
938 fac->name,
939 fac_ids, ltt_fac_ids_destroy);
940 }
941 g_array_append_val(fac_ids, fac->id);
942
943 break;
944 case LTT_EVENT_HEARTBEAT:
945 break;
946 default:
947 g_warning("Error in processing facility file %s, "
948 "unknown event id %hhu in core facility.",
949 g_quark_to_string(tf->name),
950 tf->event.event_id);
951 err = EPERM;
952 goto event_id_error;
953 }
954 }
955 }
956 return 0;
957
958 /* Error handling */
959 event_id_error:
960 fac_id_error:
961 update_error:
962 seek_error:
963 g_warning("An error occured in facility tracefile parsing");
964 return err;
965 }
966
967
968 LttTrace *ltt_trace_open(const gchar *pathname)
969 {
970 gchar abs_path[PATH_MAX];
971 LttTrace * t;
972 LttTracefile *tf;
973 GArray *group;
974 int i, ret;
975 struct ltt_block_start_header *header;
976 DIR *dir;
977 struct dirent *entry;
978 guint control_found = 0;
979 guint eventdefs_found = 0;
980 struct stat stat_buf;
981 gchar path[PATH_MAX];
982
983 t = g_new(LttTrace, 1);
984 if(!t) goto alloc_error;
985
986 get_absolute_pathname(pathname, abs_path);
987 t->pathname = g_quark_from_string(abs_path);
988
989 g_datalist_init(&t->tracefiles);
990
991 /* Test to see if it looks like a trace */
992 dir = opendir(abs_path);
993 if(dir == NULL) {
994 perror(abs_path);
995 goto open_error;
996 }
997 while((entry = readdir(dir)) != NULL) {
998 strcpy(path, abs_path);
999 strcat(path, "/");
1000 strcat(path, entry->d_name);
1001 ret = stat(path, &stat_buf);
1002 if(ret == -1) {
1003 perror(path);
1004 continue;
1005 }
1006 if(S_ISDIR(stat_buf.st_mode)) {
1007 if(strcmp(entry->d_name, "control") == 0) {
1008 control_found = 1;
1009 }
1010 if(strcmp(entry->d_name, "eventdefs") == 0) {
1011 eventdefs_found = 1;
1012 }
1013 }
1014 }
1015 closedir(dir);
1016
1017 if(!control_found || !eventdefs_found) goto find_error;
1018
1019 /* Open all the tracefiles */
1020 if(open_tracefiles(t, abs_path, "")) {
1021 g_warning("Error opening tracefile %s", abs_path);
1022 goto find_error;
1023 }
1024
1025 /* Prepare the facilities containers : array and mapping */
1026 /* Array is zeroed : the "exists" field is set to false by default */
1027 t->facilities_by_num = g_array_sized_new (FALSE,
1028 TRUE, sizeof(LttFacility),
1029 NUM_FACILITIES);
1030 t->facilities_by_num = g_array_set_size(t->facilities_by_num, NUM_FACILITIES);
1031
1032 g_datalist_init(&t->facilities_by_name);
1033
1034 /* Parse each trace control/facilitiesN files : get runtime fac. info */
1035 group = g_datalist_id_get_data(&t->tracefiles, LTT_TRACEFILE_NAME_FACILITIES);
1036 if(group == NULL) {
1037 g_error("Trace %s has no facility tracefile", abs_path);
1038 g_assert(0);
1039 goto facilities_error;
1040 }
1041
1042 /* Get the trace information for the control/facility 0 tracefile */
1043 g_assert(group->len > 0);
1044 tf = &g_array_index (group, LttTracefile, 0);
1045 header = (struct ltt_block_start_header*)tf->buffer.head;
1046 t->arch_type = ltt_get_uint32(LTT_GET_BO(tf), &header->trace.arch_type);
1047 t->arch_variant = ltt_get_uint32(LTT_GET_BO(tf), &header->trace.arch_variant);
1048 t->arch_size = header->trace.arch_size;
1049 t->ltt_major_version = header->trace.major_version;
1050 t->ltt_minor_version = header->trace.minor_version;
1051 t->flight_recorder = header->trace.flight_recorder;
1052 t->has_heartbeat = header->trace.has_heartbeat;
1053 t->has_alignment = header->trace.has_alignment;
1054 t->has_tsc = header->trace.has_tsc;
1055
1056 t->num_cpu = group->len;
1057
1058 for(i=0; i<group->len; i++) {
1059 tf = &g_array_index (group, LttTracefile, i);
1060 if(ltt_process_facility_tracefile(tf))
1061 goto facilities_error;
1062 }
1063
1064 return t;
1065
1066 /* Error handling */
1067 facilities_error:
1068 g_datalist_clear(&t->facilities_by_name);
1069 g_array_free(t->facilities_by_num, TRUE);
1070 find_error:
1071 g_datalist_clear(&t->tracefiles);
1072 open_error:
1073 g_free(t);
1074 alloc_error:
1075 return NULL;
1076
1077 }
1078
1079 GQuark ltt_trace_name(const LttTrace *t)
1080 {
1081 return t->pathname;
1082 }
1083
1084
1085 /******************************************************************************
1086 * When we copy a trace, we want all the opening actions to happen again :
1087 * the trace will be reopened and totally independant from the original.
1088 * That's why we call ltt_trace_open.
1089 *****************************************************************************/
1090 LttTrace *ltt_trace_copy(LttTrace *self)
1091 {
1092 return ltt_trace_open(g_quark_to_string(self->pathname));
1093 }
1094
1095 void ltt_trace_close(LttTrace *t)
1096 {
1097 guint i;
1098 LttFacility *fac;
1099
1100 for(i=0; i<t->facilities_by_num->len; i++) {
1101 fac = &g_array_index (t->facilities_by_num, LttFacility, i);
1102 if(fac->exists)
1103 ltt_facility_close(fac);
1104 }
1105
1106 g_datalist_clear(&t->facilities_by_name);
1107 g_array_free(t->facilities_by_num, TRUE);
1108 g_datalist_clear(&t->tracefiles);
1109 g_free(t);
1110 }
1111
1112
1113 /*****************************************************************************
1114 *Get the system description of the trace
1115 ****************************************************************************/
1116
1117 LttFacility *ltt_trace_facility_by_id(LttTrace *t, guint8 id)
1118 {
1119 g_assert(id < t->facilities_by_num->len);
1120 return &g_array_index(t->facilities_by_num, LttFacility, id);
1121 }
1122
1123 /* ltt_trace_facility_get_by_name
1124 *
1125 * Returns the GArray of facility indexes. All the fac_ids that matches the
1126 * requested facility name.
1127 *
1128 * If name is not found, returns NULL.
1129 */
1130 GArray *ltt_trace_facility_get_by_name(LttTrace *t, GQuark name)
1131 {
1132 return g_datalist_id_get_data(&t->facilities_by_name, name);
1133 }
1134
1135 /*****************************************************************************
1136 * Functions to discover all the event types in the trace
1137 ****************************************************************************/
1138
1139 #if 0
1140 unsigned ltt_trace_eventtype_number(LttTrace *t)
1141 {
1142 unsigned int i;
1143 unsigned count = 0;
1144 unsigned int num = t->facility_number;
1145 LttFacility * f;
1146
1147 for(i=0;i<num;i++){
1148 f = (LttFacility*)g_ptr_array_index(t->facilities, i);
1149 count += f->event_number;
1150 }
1151 return count;
1152 }
1153 #endif //0
1154
1155 #if 0
1156 //use an iteration on all the trace facilities, and inside iteration on all the
1157 //event types in each facilities instead.
1158 LttEventType *ltt_trace_eventtype_get(LttTrace *t, unsigned evId)
1159 {
1160 LttEventType *event_type;
1161
1162 LttFacility * f;
1163 f = ltt_trace_facility_by_id(t,evId);
1164
1165 if(unlikely(!f)) event_type = NULL;
1166 else event_type = f->events[evId - f->base_id];
1167
1168 return event_type;
1169 }
1170 #endif //0
1171
1172 #if 0
1173 /*****************************************************************************
1174 * ltt_trace_find_tracefile
1175 *
1176 * Find a tracefile by name and index in the group.
1177 *
1178 * Returns a pointer to the tracefiles, else NULL.
1179 ****************************************************************************/
1180
1181 LttTracefile *ltt_trace_find_tracefile(LttTrace *t, const gchar *name)
1182 {
1183 }
1184 #endif //0
1185
1186 /*****************************************************************************
1187 * Get the start time and end time of the trace
1188 ****************************************************************************/
1189
1190 static void ltt_tracefile_time_span_get(LttTracefile *tf,
1191 LttTime *start, LttTime *end)
1192 {
1193 int err;
1194
1195 err = map_block(tf, 0);
1196 if(unlikely(err)) {
1197 g_error("Can not map block");
1198 *start = ltt_time_infinite;
1199 } else
1200 *start = tf->buffer.begin.timestamp;
1201
1202 err = map_block(tf, tf->num_blocks - 1); /* Last block */
1203 if(unlikely(err)) {
1204 g_error("Can not map block");
1205 *end = ltt_time_zero;
1206 } else
1207 *end = tf->buffer.end.timestamp;
1208 }
1209
1210 struct tracefile_time_span_get_args {
1211 LttTrace *t;
1212 LttTime *start;
1213 LttTime *end;
1214 };
1215
1216 static void group_time_span_get(GQuark name, gpointer data, gpointer user_data)
1217 {
1218 struct tracefile_time_span_get_args *args =
1219 (struct tracefile_time_span_get_args*)user_data;
1220
1221 GArray *group = (GArray *)data;
1222 int i;
1223 LttTracefile *tf;
1224 LttTime tmp_start;
1225 LttTime tmp_end;
1226
1227 for(i=0; i<group->len; i++) {
1228 tf = &g_array_index (group, LttTracefile, i);
1229 if(tf->cpu_online) {
1230 ltt_tracefile_time_span_get(tf, &tmp_start, &tmp_end);
1231 if(ltt_time_compare(*args->start, tmp_start)>0) *args->start = tmp_start;
1232 if(ltt_time_compare(*args->end, tmp_end)<0) *args->end = tmp_end;
1233 }
1234 }
1235 }
1236
1237 void ltt_trace_time_span_get(LttTrace *t, LttTime *start, LttTime *end)
1238 {
1239 LttTime min_start = ltt_time_infinite;
1240 LttTime max_end = ltt_time_zero;
1241 struct tracefile_time_span_get_args args = { t, &min_start, &max_end };
1242
1243 g_datalist_foreach(&t->tracefiles, &group_time_span_get, &args);
1244
1245 if(start != NULL) *start = min_start;
1246 if(end != NULL) *end = max_end;
1247
1248 }
1249
1250
1251 /*****************************************************************************
1252 *Get the name of a tracefile
1253 ****************************************************************************/
1254
1255 GQuark ltt_tracefile_name(LttTracefile *tf)
1256 {
1257 return tf->name;
1258 }
1259
1260
1261 guint ltt_tracefile_num(LttTracefile *tf)
1262 {
1263 return tf->cpu_num;
1264 }
1265
1266 /*****************************************************************************
1267 * Get the number of blocks in the tracefile
1268 ****************************************************************************/
1269
1270 guint ltt_tracefile_block_number(LttTracefile *tf)
1271 {
1272 return tf->num_blocks;
1273 }
1274
1275
1276 /* Seek to the first event in a tracefile that has a time equal or greater than
1277 * the time passed in parameter.
1278 *
1279 * If the time parameter is outside the tracefile time span, seek to the first
1280 * event or if after, return ERANGE.
1281 *
1282 * If the time parameter is before the first event, we have to seek specially to
1283 * there.
1284 *
1285 * If the time is after the end of the trace, return ERANGE.
1286 *
1287 * Do a binary search to find the right block, then a sequential search in the
1288 * block to find the event.
1289 *
1290 * In the special case where the time requested fits inside a block that has no
1291 * event corresponding to the requested time, the first event of the next block
1292 * will be seeked.
1293 *
1294 * IMPORTANT NOTE : // FIXME everywhere...
1295 *
1296 * You MUST NOT do a ltt_tracefile_read right after a ltt_tracefile_seek_time :
1297 * you will jump over an event if you do.
1298 *
1299 * Return value : 0 : no error, the tf->event can be used
1300 * ERANGE : time if after the last event of the trace
1301 * otherwise : this is an error.
1302 *
1303 * */
1304
1305 int ltt_tracefile_seek_time(LttTracefile *tf, LttTime time)
1306 {
1307 int ret = 0;
1308 int err;
1309 unsigned int block_num, high, low;
1310
1311 /* seek at the beginning of trace */
1312 err = map_block(tf, 0); /* First block */
1313 if(unlikely(err)) {
1314 g_error("Can not map block");
1315 goto fail;
1316 }
1317
1318 /* If the time is lower or equal the beginning of the trace,
1319 * go to the first event. */
1320 if(ltt_time_compare(time, tf->buffer.begin.timestamp) <= 0) {
1321 ret = ltt_tracefile_read(tf);
1322 if(ret == ERANGE) goto range;
1323 else if (ret) goto fail;
1324 goto found; /* There is either no event in the trace or the event points
1325 to the first event in the trace */
1326 }
1327
1328 err = map_block(tf, tf->num_blocks - 1); /* Last block */
1329 if(unlikely(err)) {
1330 g_error("Can not map block");
1331 goto fail;
1332 }
1333
1334 /* If the time is after the end of the trace, return ERANGE. */
1335 if(ltt_time_compare(time, tf->buffer.end.timestamp) > 0) {
1336 goto range;
1337 }
1338
1339 /* Binary search the block */
1340 high = tf->num_blocks - 1;
1341 low = 0;
1342
1343 while(1) {
1344 block_num = ((high-low) / 2) + low;
1345
1346 err = map_block(tf, block_num);
1347 if(unlikely(err)) {
1348 g_error("Can not map block");
1349 goto fail;
1350 }
1351 if(high == low) {
1352 /* We cannot divide anymore : this is what would happen if the time
1353 * requested was exactly between two consecutive buffers'end and start
1354 * timestamps. This is also what would happend if we didn't deal with out
1355 * of span cases prior in this function. */
1356 /* The event is right in the buffer!
1357 * (or in the next buffer first event) */
1358 while(1) {
1359 ret = ltt_tracefile_read(tf);
1360 if(ret == ERANGE) goto range; /* ERANGE or EPERM */
1361 else if(ret) goto fail;
1362
1363 if(ltt_time_compare(time, tf->event.event_time) >= 0)
1364 goto found;
1365 }
1366
1367 } else if(ltt_time_compare(time, tf->buffer.begin.timestamp) < 0) {
1368 /* go to lower part */
1369 high = block_num;
1370 } else if(ltt_time_compare(time, tf->buffer.end.timestamp) > 0) {
1371 /* go to higher part */
1372 low = block_num;
1373 } else {/* The event is right in the buffer!
1374 (or in the next buffer first event) */
1375 while(1) {
1376 ret = ltt_tracefile_read(tf);
1377 if(ret == ERANGE) goto range; /* ERANGE or EPERM */
1378 else if(ret) goto fail;
1379
1380 if(ltt_time_compare(time, tf->event.event_time) >= 0)
1381 break;
1382 }
1383 goto found;
1384 }
1385 }
1386
1387 found:
1388 return 0;
1389 range:
1390 return ERANGE;
1391
1392 /* Error handling */
1393 fail:
1394 g_error("ltt_tracefile_seek_time failed on tracefile %s",
1395 g_quark_to_string(tf->name));
1396 return EPERM;
1397 }
1398
1399
1400 int ltt_tracefile_seek_position(LttTracefile *tf, const LttEventPosition *ep) {
1401
1402 int err;
1403
1404 if(ep->tracefile != tf) {
1405 goto fail;
1406 }
1407
1408 err = map_block(tf, ep->block);
1409 if(unlikely(err)) {
1410 g_error("Can not map block");
1411 goto fail;
1412 }
1413
1414 tf->event.offset = ep->offset;
1415
1416 err = ltt_tracefile_read_update_event(tf);
1417 if(err) goto fail;
1418 err = ltt_tracefile_read_op(tf);
1419 if(err) goto fail;
1420
1421 return 0;
1422
1423 fail:
1424 g_error("ltt_tracefile_seek_time failed on tracefile %s",
1425 g_quark_to_string(tf->name));
1426 return 1;
1427 }
1428
1429 /* Calculate the real event time based on the buffer boundaries */
1430 LttTime ltt_interpolate_time(LttTracefile *tf, LttEvent *event)
1431 {
1432 LttTime time;
1433
1434 g_assert(tf->trace->has_tsc);
1435
1436 time = ltt_time_from_uint64(
1437 (guint64)(tf->buffer.tsc - tf->buffer.begin.cycle_count) *
1438 tf->buffer.nsecs_per_cycle);
1439 time = ltt_time_add(tf->buffer.begin.timestamp, time);
1440
1441 return time;
1442 }
1443
1444
1445 /* Get the current event of the tracefile : valid until the next read */
1446 LttEvent *ltt_tracefile_get_event(LttTracefile *tf)
1447 {
1448 return &tf->event;
1449 }
1450
1451
1452
1453 /*****************************************************************************
1454 *Function name
1455 * ltt_tracefile_read : Read the next event in the tracefile
1456 *Input params
1457 * t : tracefile
1458 *Return value
1459 *
1460 * Returns 0 if an event can be used in tf->event.
1461 * Returns ERANGE on end of trace. The event in tf->event still can be used
1462 * (if the last block was not empty).
1463 * Returns EPERM on error.
1464 *
1465 * This function does make the tracefile event structure point to the event
1466 * currently pointed to by the tf->event.
1467 *
1468 * Note : you must call a ltt_tracefile_seek to the beginning of the trace to
1469 * reinitialize it after an error if you want results to be coherent.
1470 * It would be the case if a end of trace last buffer has no event : the end
1471 * of trace wouldn't be returned, but an error.
1472 * We make the assumption there is at least one event per buffer.
1473 ****************************************************************************/
1474
1475 int ltt_tracefile_read(LttTracefile *tf)
1476 {
1477 int err;
1478
1479 err = ltt_tracefile_read_seek(tf);
1480 if(err) return err;
1481 err = ltt_tracefile_read_update_event(tf);
1482 if(err) return err;
1483 err = ltt_tracefile_read_op(tf);
1484 if(err) return err;
1485
1486 return 0;
1487 }
1488
1489 int ltt_tracefile_read_seek(LttTracefile *tf)
1490 {
1491 int err;
1492
1493 /* Get next buffer until we finally have an event, or end of trace */
1494 while(1) {
1495 err = ltt_seek_next_event(tf);
1496 if(unlikely(err == ENOPROTOOPT)) {
1497 return EPERM;
1498 }
1499
1500 /* Are we at the end of the buffer ? */
1501 if(err == ERANGE) {
1502 if(unlikely(tf->buffer.index == tf->num_blocks-1)){ /* end of trace ? */
1503 return ERANGE;
1504 } else {
1505 /* get next block */
1506 err = map_block(tf, tf->buffer.index + 1);
1507 if(unlikely(err)) {
1508 g_error("Can not map block");
1509 return EPERM;
1510 }
1511 }
1512 } else break; /* We found an event ! */
1513 }
1514
1515 return 0;
1516 }
1517
1518
1519 /* do specific operation on events */
1520 int ltt_tracefile_read_op(LttTracefile *tf)
1521 {
1522 LttEvent *event;
1523
1524 event = &tf->event;
1525
1526 /* do event specific operation */
1527
1528 /* do something if its an heartbeat event : increment the heartbeat count */
1529 //if(event->facility_id == LTT_FACILITY_CORE)
1530 // if(event->event_id == LTT_EVENT_HEARTBEAT)
1531 // tf->cur_heart_beat_number++;
1532
1533 return 0;
1534 }
1535
1536
1537 /* same as ltt_tracefile_read, but does not seek to the next event nor call
1538 * event specific operation. */
1539 int ltt_tracefile_read_update_event(LttTracefile *tf)
1540 {
1541 void * pos;
1542 LttEvent *event;
1543
1544 event = &tf->event;
1545 pos = tf->buffer.head + event->offset;
1546
1547 /* Read event header */
1548
1549 //TODO align
1550
1551 if(tf->trace->has_tsc) {
1552 if(tf->trace->has_heartbeat) {
1553 event->time.timestamp = ltt_get_uint32(LTT_GET_BO(tf),
1554 pos);
1555 /* 32 bits -> 64 bits tsc */
1556 /* note : still works for seek and non seek cases. */
1557 if(event->time.timestamp < (0xFFFFFFFFULL&tf->buffer.tsc)) {
1558 tf->buffer.tsc = ((tf->buffer.tsc&0xFFFFFFFF00000000ULL)
1559 + 0x100000000ULL)
1560 | (guint64)event->time.timestamp;
1561 event->tsc = tf->buffer.tsc;
1562 } else {
1563 /* no overflow */
1564 tf->buffer.tsc = (tf->buffer.tsc&0xFFFFFFFF00000000ULL)
1565 | (guint64)event->time.timestamp;
1566 event->tsc = tf->buffer.tsc;
1567 }
1568 pos += sizeof(guint32);
1569 } else {
1570 event->tsc = ltt_get_uint64(LTT_GET_BO(tf), pos);
1571 tf->buffer.tsc = event->tsc;
1572 pos += sizeof(guint64);
1573 }
1574
1575 event->event_time = ltt_interpolate_time(tf, event);
1576 } else {
1577 event->time.delta.tv_sec = 0;
1578 event->time.delta.tv_nsec = ltt_get_uint32(LTT_GET_BO(tf),
1579 pos) * NSEC_PER_USEC;
1580 tf->buffer.tsc = 0;
1581 event->tsc = tf->buffer.tsc;
1582
1583 event->event_time = ltt_time_add(tf->buffer.begin.timestamp,
1584 event->time.delta);
1585 pos += sizeof(guint32);
1586 }
1587
1588 event->facility_id = *(guint8*)pos;
1589 pos += sizeof(guint8);
1590
1591 event->event_id = *(guint8*)pos;
1592 pos += sizeof(guint8);
1593
1594 event->event_size = ltt_get_uint16(LTT_GET_BO(tf), pos);
1595 pos += sizeof(guint16);
1596
1597 event->data = pos;
1598
1599 /* get the data size and update the event fields with the current
1600 * information */
1601 ltt_update_event_size(tf);
1602
1603 return 0;
1604 }
1605
1606
1607 /****************************************************************************
1608 *Function name
1609 * map_block : map a block from the file
1610 *Input Params
1611 * lttdes : ltt trace file
1612 * whichBlock : the block which will be read
1613 *return value
1614 * 0 : success
1615 * EINVAL : lseek fail
1616 * EIO : can not read from the file
1617 ****************************************************************************/
1618
1619 static gint map_block(LttTracefile * tf, guint block_num)
1620 {
1621 int page_size = getpagesize();
1622 struct ltt_block_start_header *header;
1623
1624 g_assert(block_num < tf->num_blocks);
1625
1626 if(tf->buffer.head != NULL) {
1627 if(munmap(tf->buffer.head, PAGE_ALIGN(tf->buf_size))) {
1628 g_warning("unmap size : %u\n",
1629 PAGE_ALIGN(tf->buf_size));
1630 perror("munmap error");
1631 g_assert(0);
1632 }
1633 }
1634
1635
1636 /* Multiple of pages aligned head */
1637 tf->buffer.head = mmap(0,
1638 PAGE_ALIGN(tf->buf_size),
1639 PROT_READ, MAP_PRIVATE, tf->fd,
1640 PAGE_ALIGN((off_t)tf->buf_size * (off_t)block_num));
1641
1642 if(tf->buffer.head == MAP_FAILED) {
1643 perror("Error in allocating memory for buffer of tracefile");
1644 g_assert(0);
1645 goto map_error;
1646 }
1647 g_assert( ( (guint)tf->buffer.head&(8-1) ) == 0); // make sure it's aligned.
1648
1649
1650 tf->buffer.index = block_num;
1651
1652 header = (struct ltt_block_start_header*)tf->buffer.head;
1653
1654 tf->buffer.begin.timestamp = ltt_get_time(LTT_GET_BO(tf),
1655 &header->begin.timestamp);
1656 tf->buffer.begin.timestamp.tv_nsec *= NSEC_PER_USEC;
1657 g_debug("block %u begin : %lu.%lu", block_num,
1658 tf->buffer.begin.timestamp.tv_sec, tf->buffer.begin.timestamp.tv_nsec);
1659 tf->buffer.begin.cycle_count = ltt_get_uint64(LTT_GET_BO(tf),
1660 &header->begin.cycle_count);
1661 tf->buffer.end.timestamp = ltt_get_time(LTT_GET_BO(tf),
1662 &header->end.timestamp);
1663 tf->buffer.end.timestamp.tv_nsec *= NSEC_PER_USEC;
1664 g_debug("block %u end : %lu.%lu", block_num,
1665 tf->buffer.end.timestamp.tv_sec, tf->buffer.end.timestamp.tv_nsec);
1666 tf->buffer.end.cycle_count = ltt_get_uint64(LTT_GET_BO(tf),
1667 &header->end.cycle_count);
1668 tf->buffer.lost_size = ltt_get_uint32(LTT_GET_BO(tf),
1669 &header->lost_size);
1670
1671 tf->buffer.tsc = tf->buffer.begin.cycle_count;
1672 tf->event.tsc = tf->buffer.tsc;
1673
1674 /* FIXME
1675 * eventually support variable buffer size : will need a partial pre-read of
1676 * the headers to create an index when we open the trace... eventually. */
1677 g_assert(tf->buf_size == ltt_get_uint32(LTT_GET_BO(tf),
1678 &header->buf_size));
1679
1680 /* Now that the buffer is mapped, calculate the time interpolation for the
1681 * block. */
1682
1683 tf->buffer.nsecs_per_cycle = calc_nsecs_per_cycle(tf);
1684
1685 /* Make the current event point to the beginning of the buffer :
1686 * it means that the event read must get the first event. */
1687 tf->event.tracefile = tf;
1688 tf->event.block = block_num;
1689 tf->event.offset = 0;
1690
1691 return 0;
1692
1693 map_error:
1694 return -errno;
1695
1696 }
1697
1698 /* It will update the fields offsets too */
1699 void ltt_update_event_size(LttTracefile *tf)
1700 {
1701 ssize_t size = 0;
1702
1703 /* Specific handling of core events : necessary to read the facility control
1704 * tracefile. */
1705 LttFacility *f = ltt_trace_get_facility_by_num(tf->trace,
1706 tf->event.facility_id);
1707
1708 if(likely(tf->event.facility_id == LTT_FACILITY_CORE)) {
1709 switch((enum ltt_core_events)tf->event.event_id) {
1710 case LTT_EVENT_FACILITY_LOAD:
1711 size = strlen((char*)tf->event.data) + 1;
1712 g_debug("Update Event facility load of facility %s", (char*)tf->event.data);
1713 size += sizeof(struct LttFacilityLoad);
1714 break;
1715 case LTT_EVENT_FACILITY_UNLOAD:
1716 g_debug("Update Event facility unload");
1717 size = sizeof(struct LttFacilityUnload);
1718 break;
1719 case LTT_EVENT_STATE_DUMP_FACILITY_LOAD:
1720 size = strlen((char*)tf->event.data) + 1;
1721 g_debug("Update Event facility load state dump of facility %s",
1722 (char*)tf->event.data);
1723 size += sizeof(struct LttStateDumpFacilityLoad);
1724 break;
1725 case LTT_EVENT_HEARTBEAT:
1726 g_debug("Update Event heartbeat");
1727 size = sizeof(TimeHeartbeat);
1728 break;
1729 default:
1730 g_warning("Error in getting event size : tracefile %s, "
1731 "unknown event id %hhu in core facility.",
1732 g_quark_to_string(tf->name),
1733 tf->event.event_id);
1734 goto event_id_error;
1735
1736 }
1737 } else {
1738 if(!f->exists) {
1739 g_error("Unknown facility %hhu (0x%hhx) in tracefile %s",
1740 tf->event.facility_id,
1741 tf->event.facility_id,
1742 g_quark_to_string(tf->name));
1743 goto facility_error;
1744 }
1745
1746 LttEventType *event_type =
1747 ltt_facility_eventtype_get(f, tf->event.event_id);
1748
1749 if(!event_type) {
1750 g_error("Unknown event id %hhu in facility %s in tracefile %s",
1751 tf->event.event_id,
1752 g_quark_to_string(f->name),
1753 g_quark_to_string(tf->name));
1754 goto event_type_error;
1755 }
1756
1757 if(event_type->root_field)
1758 size = get_field_type_size(tf, event_type,
1759 0, 0, event_type->root_field, tf->event.data);
1760 else
1761 size = 0;
1762
1763 g_debug("Event root field : f.e %hhu.%hhu size %zd",
1764 tf->event.facility_id,
1765 tf->event.event_id, size);
1766 }
1767
1768 tf->event.data_size = size;
1769
1770 /* Check consistency between kernel and LTTV structure sizes */
1771 g_assert(tf->event.data_size == tf->event.event_size);
1772
1773 return;
1774
1775 facility_error:
1776 event_type_error:
1777 event_id_error:
1778 tf->event.data_size = 0;
1779 }
1780
1781
1782 /* Take the tf current event offset and use the event facility id and event id
1783 * to figure out where is the next event offset.
1784 *
1785 * This is an internal function not aiming at being used elsewhere : it will
1786 * not jump over the current block limits. Please consider using
1787 * ltt_tracefile_read to do this.
1788 *
1789 * Returns 0 on success
1790 * ERANGE if we are at the end of the buffer.
1791 * ENOPROTOOPT if an error occured when getting the current event size.
1792 */
1793 static int ltt_seek_next_event(LttTracefile *tf)
1794 {
1795 int ret = 0;
1796 void *pos;
1797
1798 /* seek over the buffer header if we are at the buffer start */
1799 if(tf->event.offset == 0) {
1800 tf->event.offset += sizeof(struct ltt_block_start_header);
1801
1802 if(tf->event.offset == tf->buf_size - tf->buffer.lost_size) {
1803 ret = ERANGE;
1804 }
1805 goto found;
1806 }
1807
1808
1809 pos = tf->event.data;
1810
1811 if(tf->event.data_size < 0) goto error;
1812
1813 pos += (size_t)tf->event.data_size;
1814
1815 tf->event.offset = pos - tf->buffer.head;
1816
1817 if(tf->event.offset == tf->buf_size - tf->buffer.lost_size) {
1818 ret = ERANGE;
1819 goto found;
1820 }
1821
1822 found:
1823 return ret;
1824
1825 error:
1826 g_error("Error in ltt_seek_next_event for tracefile %s",
1827 g_quark_to_string(tf->name));
1828 return ENOPROTOOPT;
1829 }
1830
1831
1832 /*****************************************************************************
1833 *Function name
1834 * calc_nsecs_per_cycle : calculate nsecs per cycle for current block
1835 *Input Params
1836 * t : tracefile
1837 ****************************************************************************/
1838
1839 static double calc_nsecs_per_cycle(LttTracefile * tf)
1840 {
1841 LttTime lBufTotalTime; /* Total time for this buffer */
1842 double lBufTotalNSec; /* Total time for this buffer in nsecs */
1843 LttCycleCount lBufTotalCycle;/* Total cycles for this buffer */
1844
1845 /* Calculate the total time for this buffer */
1846 lBufTotalTime = ltt_time_sub(tf->buffer.end.timestamp,
1847 tf->buffer.begin.timestamp);
1848
1849 /* Calculate the total cycles for this bufffer */
1850 lBufTotalCycle = tf->buffer.end.cycle_count;
1851 lBufTotalCycle -= tf->buffer.begin.cycle_count;
1852
1853 /* Convert the total time to double */
1854 lBufTotalNSec = ltt_time_to_double(lBufTotalTime);
1855
1856 return lBufTotalNSec / (double)lBufTotalCycle;
1857
1858 }
1859 #if 0
1860 void setFieldsOffset(LttTracefile *tf, LttEventType *evT,void *evD)
1861 {
1862 LttField * rootFld = evT->root_field;
1863 // rootFld->base_address = evD;
1864
1865 if(likely(rootFld))
1866 rootFld->field_size = getFieldtypeSize(tf, evT->facility,
1867 evT, 0,0,rootFld, evD);
1868 }
1869 #endif //0
1870
1871 /*****************************************************************************
1872 *Function name
1873 * set_fields_offsets : set the precomputable offset of the fields
1874 *Input params
1875 * tracefile : opened trace file
1876 * event_type : the event type
1877 ****************************************************************************/
1878
1879 void set_fields_offsets(LttTracefile *tf, LttEventType *event_type)
1880 {
1881 LttField *field = event_type->root_field;
1882 enum field_status fixed_root = FIELD_FIXED, fixed_parent = FIELD_FIXED;
1883
1884 if(likely(field))
1885 preset_field_type_size(tf, event_type, 0, 0,
1886 &fixed_root, &fixed_parent,
1887 field);
1888
1889 }
1890
1891
1892 /*****************************************************************************
1893 *Function name
1894 * preset_field_type_size : set the fixed sizes of the field type
1895 *Input params
1896 * tf : tracefile
1897 * event_type : event type
1898 * offset_root : offset from the root
1899 * offset_parent : offset from the parent
1900 * fixed_root : Do we know a fixed offset to the root ?
1901 * fixed_parent : Do we know a fixed offset to the parent ?
1902 * field : field
1903 ****************************************************************************/
1904 void preset_field_type_size(LttTracefile *tf, LttEventType *event_type,
1905 off_t offset_root, off_t offset_parent,
1906 enum field_status *fixed_root, enum field_status *fixed_parent,
1907 LttField *field)
1908 {
1909 enum field_status local_fixed_root, local_fixed_parent;
1910 guint i;
1911 LttType *type;
1912
1913 g_assert(field->fixed_root == FIELD_UNKNOWN);
1914 g_assert(field->fixed_parent == FIELD_UNKNOWN);
1915 g_assert(field->fixed_size == FIELD_UNKNOWN);
1916
1917 type = field->field_type;
1918
1919 field->fixed_root = *fixed_root;
1920 if(field->fixed_root == FIELD_FIXED)
1921 field->offset_root = offset_root;
1922 else
1923 field->offset_root = 0;
1924
1925 field->fixed_parent = *fixed_parent;
1926 if(field->fixed_parent == FIELD_FIXED)
1927 field->offset_parent = offset_parent;
1928 else
1929 field->offset_parent = 0;
1930
1931 size_t current_root_offset;
1932 size_t current_offset;
1933 enum field_status current_child_status, final_child_status;
1934 size_t max_size;
1935
1936 switch(type->type_class) {
1937 case LTT_INT:
1938 case LTT_UINT:
1939 case LTT_FLOAT:
1940 case LTT_ENUM:
1941 field->field_size = ltt_type_size(tf->trace, type);
1942 field->fixed_size = FIELD_FIXED;
1943 break;
1944 case LTT_POINTER:
1945 field->field_size = (off_t)event_type->facility->pointer_size;
1946 field->fixed_size = FIELD_FIXED;
1947 break;
1948 case LTT_LONG:
1949 case LTT_ULONG:
1950 field->field_size = (off_t)event_type->facility->long_size;
1951 field->fixed_size = FIELD_FIXED;
1952 break;
1953 case LTT_SIZE_T:
1954 case LTT_SSIZE_T:
1955 case LTT_OFF_T:
1956 field->field_size = (off_t)event_type->facility->size_t_size;
1957 field->fixed_size = FIELD_FIXED;
1958 break;
1959 case LTT_SEQUENCE:
1960 local_fixed_root = FIELD_VARIABLE;
1961 local_fixed_parent = FIELD_VARIABLE;
1962 preset_field_type_size(tf, event_type,
1963 0, 0,
1964 &local_fixed_root, &local_fixed_parent,
1965 field->child[0]);
1966 field->fixed_size = FIELD_VARIABLE;
1967 field->field_size = 0;
1968 *fixed_root = FIELD_VARIABLE;
1969 *fixed_parent = FIELD_VARIABLE;
1970 break;
1971 case LTT_STRING:
1972 field->fixed_size = FIELD_VARIABLE;
1973 field->field_size = 0;
1974 *fixed_root = FIELD_VARIABLE;
1975 *fixed_parent = FIELD_VARIABLE;
1976 break;
1977 case LTT_ARRAY:
1978 local_fixed_root = FIELD_VARIABLE;
1979 local_fixed_parent = FIELD_VARIABLE;
1980 preset_field_type_size(tf, event_type,
1981 0, 0,
1982 &local_fixed_root, &local_fixed_parent,
1983 field->child[0]);
1984 field->fixed_size = field->child[0]->fixed_size;
1985 if(field->fixed_size == FIELD_FIXED) {
1986 field->field_size = type->element_number * field->child[0]->field_size;
1987 } else {
1988 field->field_size = 0;
1989 *fixed_root = FIELD_VARIABLE;
1990 *fixed_parent = FIELD_VARIABLE;
1991 }
1992 break;
1993 case LTT_STRUCT:
1994 current_root_offset = field->offset_root;
1995 current_offset = 0;
1996 current_child_status = FIELD_FIXED;
1997 for(i=0;i<type->element_number;i++) {
1998 preset_field_type_size(tf, event_type,
1999 current_root_offset, current_offset,
2000 fixed_root, &current_child_status,
2001 field->child[i]);
2002 if(current_child_status == FIELD_FIXED) {
2003 current_root_offset += field->child[i]->field_size;
2004 current_offset += field->child[i]->field_size;
2005 } else {
2006 current_root_offset = 0;
2007 current_offset = 0;
2008 }
2009 }
2010 if(current_child_status != FIELD_FIXED) {
2011 *fixed_parent = current_child_status;
2012 field->field_size = 0;
2013 field->fixed_size = current_child_status;
2014 } else {
2015 field->field_size = current_offset;
2016 field->fixed_size = FIELD_FIXED;
2017 }
2018 break;
2019 case LTT_UNION:
2020 current_root_offset = field->offset_root;
2021 current_offset = 0;
2022 max_size = 0;
2023 final_child_status = FIELD_FIXED;
2024 for(i=0;i<type->element_number;i++) {
2025 enum field_status current_root_child_status = FIELD_FIXED;
2026 enum field_status current_child_status = FIELD_FIXED;
2027 preset_field_type_size(tf, event_type,
2028 current_root_offset, current_offset,
2029 &current_root_child_status, &current_child_status,
2030 field->child[i]);
2031 if(current_child_status != FIELD_FIXED)
2032 final_child_status = current_child_status;
2033 else
2034 max_size = max(max_size, field->child[i]->field_size);
2035 }
2036 if(final_child_status != FIELD_FIXED) {
2037 *fixed_root = final_child_status;
2038 *fixed_parent = final_child_status;
2039 field->field_size = 0;
2040 field->fixed_size = current_child_status;
2041 } else {
2042 field->field_size = max_size;
2043 field->fixed_size = FIELD_FIXED;
2044 }
2045 break;
2046 }
2047
2048 }
2049
2050
2051 /*****************************************************************************
2052 *Function name
2053 * check_fields_compatibility : Check for compatibility between two fields :
2054 * do they use the same inner structure ?
2055 *Input params
2056 * event_type1 : event type
2057 * event_type2 : event type
2058 * field1 : field
2059 * field2 : field
2060 *Returns : 0 if identical
2061 * 1 if not.
2062 ****************************************************************************/
2063 gint check_fields_compatibility(LttEventType *event_type1,
2064 LttEventType *event_type2,
2065 LttField *field1, LttField *field2)
2066 {
2067 guint different = 0;
2068 guint i;
2069 LttType *type1;
2070 LttType *type2;
2071
2072 if(field1 == NULL) {
2073 if(field2 == NULL) goto end;
2074 else {
2075 different = 1;
2076 goto end;
2077 }
2078 } else if(field2 == NULL) {
2079 different = 1;
2080 goto end;
2081 }
2082
2083 g_assert(field1->fixed_root != FIELD_UNKNOWN);
2084 g_assert(field2->fixed_root != FIELD_UNKNOWN);
2085 g_assert(field1->fixed_parent != FIELD_UNKNOWN);
2086 g_assert(field2->fixed_parent != FIELD_UNKNOWN);
2087 g_assert(field1->fixed_size != FIELD_UNKNOWN);
2088 g_assert(field2->fixed_size != FIELD_UNKNOWN);
2089
2090 type1 = field1->field_type;
2091 type2 = field2->field_type;
2092
2093 if(type1->type_class != type2->type_class) {
2094 different = 1;
2095 goto end;
2096 }
2097 if(type1->element_name != type2->element_name) {
2098 different = 1;
2099 goto end;
2100 }
2101
2102 switch(type1->type_class) {
2103 case LTT_INT:
2104 case LTT_UINT:
2105 case LTT_FLOAT:
2106 case LTT_POINTER:
2107 case LTT_LONG:
2108 case LTT_ULONG:
2109 case LTT_SIZE_T:
2110 case LTT_SSIZE_T:
2111 case LTT_OFF_T:
2112 if(field1->field_size != field2->field_size) {
2113 different = 1;
2114 goto end;
2115 }
2116 break;
2117 case LTT_ENUM:
2118 if(type1->element_number != type2->element_number) {
2119 different = 1;
2120 goto end;
2121 }
2122 for(i=0;i<type1->element_number;i++) {
2123 if(type1->enum_strings[i] != type2->enum_strings[i]) {
2124 different = 1;
2125 goto end;
2126 }
2127 }
2128 break;
2129 case LTT_SEQUENCE:
2130 /* Two elements : size and child */
2131 g_assert(type1->element_number != type2->element_number);
2132 for(i=0;i<type1->element_number;i++) {
2133 if(check_fields_compatibility(event_type1, event_type2,
2134 field1->child[0], field2->child[0])) {
2135 different = 1;
2136 goto end;
2137 }
2138 }
2139 break;
2140 case LTT_STRING:
2141 break;
2142 case LTT_ARRAY:
2143 if(field1->field_size != field2->field_size) {
2144 different = 1;
2145 goto end;
2146 }
2147 /* Two elements : size and child */
2148 g_assert(type1->element_number != type2->element_number);
2149 for(i=0;i<type1->element_number;i++) {
2150 if(check_fields_compatibility(event_type1, event_type2,
2151 field1->child[0], field2->child[0])) {
2152 different = 1;
2153 goto end;
2154 }
2155 }
2156 break;
2157 case LTT_STRUCT:
2158 case LTT_UNION:
2159 if(type1->element_number != type2->element_number) {
2160 different = 1;
2161 break;
2162 }
2163 for(i=0;i<type1->element_number;i++) {
2164 if(check_fields_compatibility(event_type1, event_type2,
2165 field1->child[0], field2->child[0])) {
2166 different = 1;
2167 goto end;
2168 }
2169 }
2170 break;
2171 }
2172 end:
2173 return different;
2174 }
2175
2176
2177
2178
2179 #if 0
2180 /*****************************************************************************
2181 *Function name
2182 * getFieldtypeSize: get the size of the field type (primitive type)
2183 *Input params
2184 * evT : event type
2185 * offsetRoot : offset from the root
2186 * offsetParent : offset from the parrent
2187 * fld : field
2188 * evD : event data, it may be NULL
2189 *Return value
2190 * int : size of the field
2191 ****************************************************************************/
2192
2193 static inline gint getFieldtypeSize(LttTracefile *tf,
2194 LttEventType * evT, gint offsetRoot,
2195 gint offsetParent, LttField * fld, void *evD)
2196 {
2197 gint size, size1, element_number, i, offset1, offset2;
2198 LttType * type = fld->field_type;
2199
2200 /* This likely has been tested with gcov : half of them.. */
2201 if(unlikely(fld->field_fixed == 1)){
2202 /* tested : none */
2203 if(unlikely(fld == evT->root_field)) {
2204 size = fld->field_size;
2205 goto end_getFieldtypeSize;
2206 }
2207 }
2208
2209 /* From gcov profiling : half string, half struct, can we gain something
2210 * from that ? (Mathieu) */
2211 switch(type->type_class) {
2212 case LTT_ARRAY:
2213 element_number = (int) type->element_number;
2214 if(fld->field_fixed == -1){
2215 size = getFieldtypeSize(tf, evT, offsetRoot,
2216 0,fld->child[0], NULL);
2217 if(size == 0){ //has string or sequence
2218 fld->field_fixed = 0;
2219 }else{
2220 fld->field_fixed = 1;
2221 size *= element_number;
2222 }
2223 }else if(fld->field_fixed == 0){// has string or sequence
2224 size = 0;
2225 for(i=0;i<element_number;i++){
2226 size += getFieldtypeSize(tf, evT, offsetRoot+size,size,
2227 fld->child[0], evD+size);
2228 }
2229 }else size = fld->field_size;
2230 if(unlikely(!evD)){
2231 fld->fixed_root = (offsetRoot==-1) ? 0 : 1;
2232 fld->fixed_parent = (offsetParent==-1) ? 0 : 1;
2233 }
2234
2235 break;
2236
2237 case LTT_SEQUENCE:
2238 size1 = (int) ltt_type_size(fac, type);
2239 if(fld->field_fixed == -1){
2240 fld->sequ_number_size = size1;
2241 fld->field_fixed = 0;
2242 size = getFieldtypeSize(evT, offsetRoot,
2243 0,fld->child[0], NULL);
2244 fld->element_size = size;
2245 }else{//0: sequence
2246 element_number = getIntNumber(tf,size1,evD);
2247 type->element_number = element_number;
2248 if(fld->element_size > 0){
2249 size = element_number * fld->element_size;
2250 }else{//sequence has string or sequence
2251 size = 0;
2252 for(i=0;i<element_number;i++){
2253 size += getFieldtypeSize(tf, evT,
2254 offsetRoot+size+size1,size+size1,
2255 fld->child[0], evD+size+size1);
2256 }
2257 }
2258 size += size1;
2259 }
2260 if(unlikely(!evD)){
2261 fld->fixed_root = (offsetRoot==-1) ? 0 : 1;
2262 fld->fixed_parent = (offsetParent==-1) ? 0 : 1;
2263 }
2264
2265 break;
2266
2267 case LTT_STRING:
2268 size = 0;
2269 if(fld->field_fixed == -1){
2270 fld->field_fixed = 0;
2271 }else{//0: string
2272 /* Hope my implementation is faster than strlen (Mathieu) */
2273 char *ptr=(char*)evD;
2274 size = 1;
2275 /* from gcov : many many strings are empty, make it the common case.*/
2276 while(unlikely(*ptr != '\0')) { size++; ptr++; }
2277 //size = ptr - (char*)evD + 1; //include end : '\0'
2278 }
2279 fld->fixed_root = (offsetRoot==-1) ? 0 : 1;
2280 fld->fixed_parent = (offsetParent==-1) ? 0 : 1;
2281
2282 break;
2283
2284 case LTT_STRUCT:
2285 element_number = (int) type->element_number;
2286 size = 0;
2287 /* tested with gcov */
2288 if(unlikely(fld->field_fixed == -1)){
2289 offset1 = offsetRoot;
2290 offset2 = 0;
2291 for(i=0;i<element_number;i++){
2292 size1=getFieldtypeSize(tf, evT,offset1,offset2,
2293 fld->child[i], NULL);
2294 if(likely(size1 > 0 && size >= 0)){
2295 size += size1;
2296 if(likely(offset1 >= 0)) offset1 += size1;
2297 offset2 += size1;
2298 }else{
2299 size = -1;
2300 offset1 = -1;
2301 offset2 = -1;
2302 }
2303 }
2304 if(unlikely(size == -1)){
2305 fld->field_fixed = 0;
2306 size = 0;
2307 }else fld->field_fixed = 1;
2308 }else if(likely(fld->field_fixed == 0)){
2309 offset1 = offsetRoot;
2310 offset2 = 0;
2311 for(i=0;unlikely(i<element_number);i++){
2312 size=getFieldtypeSize(tf, evT, offset1, offset2,
2313 fld->child[i], evD+offset2);
2314 offset1 += size;
2315 offset2 += size;
2316 }
2317 size = offset2;
2318 }else size = fld->field_size;
2319 fld->fixed_root = (offsetRoot==-1) ? 0 : 1;
2320 fld->fixed_parent = (offsetParent==-1) ? 0 : 1;
2321 break;
2322
2323 default:
2324 if(unlikely(fld->field_fixed == -1)){
2325 size = (int) ltt_type_size(LTT_GET_BO(tf), type);
2326 fld->field_fixed = 1;
2327 }else size = fld->field_size;
2328 if(unlikely(!evD)){
2329 fld->fixed_root = (offsetRoot==-1) ? 0 : 1;
2330 fld->fixed_parent = (offsetParent==-1) ? 0 : 1;
2331 }
2332 break;
2333 }
2334
2335 fld->offset_root = offsetRoot;
2336 fld->offset_parent = offsetParent;
2337 fld->field_size = size;
2338
2339 end_getFieldtypeSize:
2340
2341 return size;
2342 }
2343 #endif //0
2344
2345 /*****************************************************************************
2346 *Function name
2347 * ltt_get_int : get an integer number
2348 *Input params
2349 * reverse_byte_order: must we reverse the byte order ?
2350 * size : the size of the integer
2351 * ptr : the data pointer
2352 *Return value
2353 * gint64 : a 64 bits integer
2354 ****************************************************************************/
2355
2356 gint64 ltt_get_int(gboolean reverse_byte_order, gint size, void *data)
2357 {
2358 gint64 val;
2359
2360 switch(size) {
2361 case 1: val = *((gint8*)data); break;
2362 case 2: val = ltt_get_int16(reverse_byte_order, data); break;
2363 case 4: val = ltt_get_int32(reverse_byte_order, data); break;
2364 case 8: val = ltt_get_int64(reverse_byte_order, data); break;
2365 default: val = ltt_get_int64(reverse_byte_order, data);
2366 g_critical("get_int : integer size %d unknown", size);
2367 break;
2368 }
2369
2370 return val;
2371 }
2372
2373 /*****************************************************************************
2374 *Function name
2375 * ltt_get_uint : get an unsigned integer number
2376 *Input params
2377 * reverse_byte_order: must we reverse the byte order ?
2378 * size : the size of the integer
2379 * ptr : the data pointer
2380 *Return value
2381 * guint64 : a 64 bits unsigned integer
2382 ****************************************************************************/
2383
2384 guint64 ltt_get_uint(gboolean reverse_byte_order, gint size, void *data)
2385 {
2386 guint64 val;
2387
2388 switch(size) {
2389 case 1: val = *((gint8*)data); break;
2390 case 2: val = ltt_get_uint16(reverse_byte_order, data); break;
2391 case 4: val = ltt_get_uint32(reverse_byte_order, data); break;
2392 case 8: val = ltt_get_uint64(reverse_byte_order, data); break;
2393 default: val = ltt_get_uint64(reverse_byte_order, data);
2394 g_critical("get_uint : unsigned integer size %d unknown",
2395 size);
2396 break;
2397 }
2398
2399 return val;
2400 }
2401
2402
2403 /* get the node name of the system */
2404
2405 char * ltt_trace_system_description_node_name (LttSystemDescription * s)
2406 {
2407 return s->node_name;
2408 }
2409
2410
2411 /* get the domain name of the system */
2412
2413 char * ltt_trace_system_description_domain_name (LttSystemDescription * s)
2414 {
2415 return s->domain_name;
2416 }
2417
2418
2419 /* get the description of the system */
2420
2421 char * ltt_trace_system_description_description (LttSystemDescription * s)
2422 {
2423 return s->description;
2424 }
2425
2426
2427 /* get the start time of the trace */
2428
2429 LttTime ltt_trace_system_description_trace_start_time(LttSystemDescription *s)
2430 {
2431 return s->trace_start;
2432 }
2433
2434
2435 LttTracefile *ltt_tracefile_new()
2436 {
2437 return g_new(LttTracefile, 1);
2438 }
2439
2440 void ltt_tracefile_destroy(LttTracefile *tf)
2441 {
2442 g_free(tf);
2443 }
2444
2445 void ltt_tracefile_copy(LttTracefile *dest, const LttTracefile *src)
2446 {
2447 *dest = *src;
2448 }
2449
2450 /* Before library loading... */
2451
2452 static void __attribute__((constructor)) init(void)
2453 {
2454 LTT_FACILITY_NAME_HEARTBEAT = g_quark_from_string("heartbeat");
2455 LTT_EVENT_NAME_HEARTBEAT = g_quark_from_string("heartbeat");
2456
2457 LTT_TRACEFILE_NAME_FACILITIES = g_quark_from_string("/control/facilities");
2458 }
2459
LTTng 2.x Viewer (LTTV)
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