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