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