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