projects / lttv.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Make sure libtraceread is completely licensed LGPL
[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 library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License Version 2.1 as published by the Free Software Foundation.
9 *
10 * This library 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 GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 * Boston, MA 02111-1307, USA.
19 */
20
21 #ifdef HAVE_CONFIG_H
22 #include <config.h>
23 #endif
24
25 #include <stdio.h>
26 #include <fcntl.h>
27 #include <string.h>
28 #include <dirent.h>
29 #include <sys/stat.h>
30 #include <sys/types.h>
31 #include <errno.h>
32 #include <unistd.h>
33 #include <math.h>
34 #include <glib.h>
35 #include <malloc.h>
36 #include <sys/mman.h>
37
38 // For realpath
39 #include <limits.h>
40 #include <stdlib.h>
41
42
43 #include "parser.h"
44 #include <ltt/ltt.h>
45 #include "ltt-private.h"
46 #include <ltt/trace.h>
47 #include <ltt/facility.h>
48 #include <ltt/event.h>
49 #include <ltt/type.h>
50 #include <ltt/ltt-types.h>
51
52
53 /* Facility names used in this file */
54
55 GQuark LTT_FACILITY_NAME_HEARTBEAT,
56 LTT_EVENT_NAME_HEARTBEAT;
57 GQuark LTT_TRACEFILE_NAME_FACILITIES;
58
59 #ifndef g_open
60 #define g_open open
61 #endif
62
63
64 #define __UNUSED__ __attribute__((__unused__))
65
66 #define g_info(format...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_INFO, format)
67
68 #ifndef g_debug
69 #define g_debug(format...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, format)
70 #endif
71
72 #define g_close close
73
74 /* Those macros must be called from within a function where page_size is a known
75 * variable */
76 #define PAGE_MASK (~(page_size-1))
77 #define PAGE_ALIGN(addr) (((addr)+page_size-1)&PAGE_MASK)
78
79 /* set the offset of the fields belonging to the event,
80 need the information of the archecture */
81 //void set_fields_offsets(LttTracefile *tf, LttEventType *event_type);
82 //size_t get_fields_offsets(LttTracefile *tf, LttEventType *event_type, void *data);
83
84 /* get the size of the field type according to
85 * The facility size information. */
86 #if 0
87 static inline void preset_field_type_size(LttTracefile *tf,
88 LttEventType *event_type,
89 off_t offset_root, off_t offset_parent,
90 enum field_status *fixed_root, enum field_status *fixed_parent,
91 LttField *field);
92 #endif //0
93
94 /* map a fixed size or a block information from the file (fd) */
95 static gint map_block(LttTracefile * tf, guint block_num);
96
97 /* calculate nsec per cycles for current block */
98 #if 0
99 static guint32 calc_nsecs_per_cycle(LttTracefile * t);
100 static guint64 cycles_2_ns(LttTracefile *tf, guint64 cycles);
101 #endif //0
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
109 void precompute_offsets(LttFacility *fac, LttEventType *event);
110
111 #if 0
112 /* Functions to parse system.xml file (using glib xml parser) */
113 static void parser_start_element (GMarkupParseContext __UNUSED__ *context,
114 const gchar *element_name,
115 const gchar **attribute_names,
116 const gchar **attribute_values,
117 gpointer user_data,
118 GError **error)
119 {
120 int i=0;
121 LttSystemDescription* des = (LttSystemDescription* )user_data;
122 if(strcmp("system", element_name)){
123 *error = g_error_new(G_MARKUP_ERROR,
124 G_LOG_LEVEL_WARNING,
125 "This is not system.xml file");
126 return;
127 }
128
129 while(attribute_names[i]){
130 if(strcmp("node_name", attribute_names[i])==0){
131 des->node_name = g_strdup(attribute_values[i]);
132 }else if(strcmp("domainname", attribute_names[i])==0){
133 des->domain_name = g_strdup(attribute_values[i]);
134 }else if(strcmp("cpu", attribute_names[i])==0){
135 des->nb_cpu = atoi(attribute_values[i]);
136 }else if(strcmp("arch_size", attribute_names[i])==0){
137 if(strcmp(attribute_values[i],"LP32") == 0) des->size = LTT_LP32;
138 else if(strcmp(attribute_values[i],"ILP32") == 0) des->size = LTT_ILP32;
139 else if(strcmp(attribute_values[i],"LP64") == 0) des->size = LTT_LP64;
140 else if(strcmp(attribute_values[i],"ILP64") == 0) des->size = LTT_ILP64;
141 else if(strcmp(attribute_values[i],"UNKNOWN") == 0) des->size = LTT_UNKNOWN;
142 }else if(strcmp("endian", attribute_names[i])==0){
143 if(strcmp(attribute_values[i],"LITTLE_ENDIAN") == 0)
144 des->endian = LTT_LITTLE_ENDIAN;
145 else if(strcmp(attribute_values[i],"BIG_ENDIAN") == 0)
146 des->endian = LTT_BIG_ENDIAN;
147 }else if(strcmp("kernel_name", attribute_names[i])==0){
148 des->kernel_name = g_strdup(attribute_values[i]);
149 }else if(strcmp("kernel_release", attribute_names[i])==0){
150 des->kernel_release = g_strdup(attribute_values[i]);
151 }else if(strcmp("kernel_version", attribute_names[i])==0){
152 des->kernel_version = g_strdup(attribute_values[i]);
153 }else if(strcmp("machine", attribute_names[i])==0){
154 des->machine = g_strdup(attribute_values[i]);
155 }else if(strcmp("processor", attribute_names[i])==0){
156 des->processor = g_strdup(attribute_values[i]);
157 }else if(strcmp("hardware_platform", attribute_names[i])==0){
158 des->hardware_platform = g_strdup(attribute_values[i]);
159 }else if(strcmp("operating_system", attribute_names[i])==0){
160 des->operating_system = g_strdup(attribute_values[i]);
161 }else if(strcmp("ltt_major_version", attribute_names[i])==0){
162 des->ltt_major_version = atoi(attribute_values[i]);
163 }else if(strcmp("ltt_minor_version", attribute_names[i])==0){
164 des->ltt_minor_version = atoi(attribute_values[i]);
165 }else if(strcmp("ltt_block_size", attribute_names[i])==0){
166 des->ltt_block_size = atoi(attribute_values[i]);
167 }else{
168 *error = g_error_new(G_MARKUP_ERROR,
169 G_LOG_LEVEL_WARNING,
170 "Not a valid attribute");
171 return;
172 }
173 i++;
174 }
175 }
176
177 static void parser_characters (GMarkupParseContext __UNUSED__ *context,
178 const gchar *text,
179 gsize __UNUSED__ text_len,
180 gpointer user_data,
181 GError __UNUSED__ **error)
182 {
183 LttSystemDescription* des = (LttSystemDescription* )user_data;
184 des->description = g_strdup(text);
185 }
186 #endif //0
187
188
189 LttFacility *ltt_trace_get_facility_by_num(LttTrace *t,
190 guint num)
191 {
192 g_assert(num < t->facilities_by_num->len);
193
194 return &g_array_index(t->facilities_by_num, LttFacility, num);
195
196 }
197
198 guint ltt_trace_get_num_cpu(LttTrace *t)
199 {
200 return t->num_cpu;
201 }
202
203
204 /* trace can be NULL
205 *
206 * Return value : 0 success, 1 bad tracefile
207 */
208 int parse_trace_header(void *header, LttTracefile *tf, LttTrace *t)
209 {
210 guint32 *magic_number = (guint32*)header;
211 struct ltt_trace_header_any *any = (struct ltt_trace_header_any *)header;
212
213 if(*magic_number == LTT_MAGIC_NUMBER)
214 tf->reverse_bo = 0;
215 else if(*magic_number == LTT_REV_MAGIC_NUMBER)
216 tf->reverse_bo = 1;
217 else /* invalid magic number, bad tracefile ! */
218 return 1;
219
220 /* Get float byte order : might be different from int byte order
221 * (or is set to 0 if the trace has no float (kernel trace)) */
222 tf->float_word_order = any->float_word_order;
223 tf->has_alignment = any->has_alignment;
224
225 if(t) {
226 t->arch_type = ltt_get_uint32(LTT_GET_BO(tf),
227 &any->arch_type);
228 t->arch_variant = ltt_get_uint32(LTT_GET_BO(tf),
229 &any->arch_variant);
230 t->arch_size = any->arch_size;
231 t->ltt_major_version = any->major_version;
232 t->ltt_minor_version = any->minor_version;
233 t->flight_recorder = any->flight_recorder;
234 t->has_heartbeat = any->has_heartbeat;
235 t->has_tsc = any->has_tsc;
236 }
237
238
239 switch(any->major_version) {
240
241 case 0:
242 switch(any->minor_version) {
243 case 3:
244 {
245 tf->buffer_header_size =
246 sizeof(struct ltt_block_start_header)
247 + sizeof(struct ltt_trace_header_0_3);
248 g_warning("Unsupported trace version : %hhu.%hhu",
249 any->major_version, any->minor_version);
250 return 1;
251 }
252 break;
253 case 6:
254 {
255 struct ltt_trace_header_0_6 *vheader =
256 (struct ltt_trace_header_0_6 *)header;
257 tf->buffer_header_size =
258 sizeof(struct ltt_block_start_header)
259 + sizeof(struct ltt_trace_header_0_6);
260 if(t) {
261 t->start_freq = ltt_get_uint64(LTT_GET_BO(tf),
262 &vheader->start_freq);
263 t->start_tsc = ltt_get_uint64(LTT_GET_BO(tf),
264 &vheader->start_tsc);
265 t->start_monotonic = ltt_get_uint64(LTT_GET_BO(tf),
266 &vheader->start_monotonic);
267 t->start_time.tv_sec = ltt_get_uint64(LTT_GET_BO(tf),
268 &vheader->start_time_sec);
269 t->start_time.tv_nsec = ltt_get_uint64(LTT_GET_BO(tf),
270 &vheader->start_time_usec);
271 t->start_time.tv_nsec *= 1000; /* microsec to nanosec */
272
273 t->start_time_from_tsc = ltt_time_from_uint64(
274 (double)t->start_tsc * 1000000.0 / (double)t->start_freq);
275 }
276 }
277 break;
278 default:
279 g_warning("Unsupported trace version : %hhu.%hhu",
280 any->major_version, any->minor_version);
281 return 1;
282 }
283 break;
284
285 default:
286 g_warning("Unsupported trace version : %hhu.%hhu",
287 any->major_version, any->minor_version);
288 return 1;
289 }
290
291
292 return 0;
293 }
294
295
296
297 /*****************************************************************************
298 *Function name
299 * ltt_tracefile_open : open a trace file, construct a LttTracefile
300 *Input params
301 * t : the trace containing the tracefile
302 * fileName : path name of the trace file
303 * tf : the tracefile structure
304 *Return value
305 * : 0 for success, -1 otherwise.
306 ****************************************************************************/
307
308 gint ltt_tracefile_open(LttTrace *t, gchar * fileName, LttTracefile *tf)
309 {
310 struct stat lTDFStat; /* Trace data file status */
311 struct ltt_block_start_header *header;
312 int page_size = getpagesize();
313
314 //open the file
315 tf->long_name = g_quark_from_string(fileName);
316 tf->trace = t;
317 tf->fd = open(fileName, O_RDONLY);
318 if(tf->fd < 0){
319 g_warning("Unable to open input data file %s\n", fileName);
320 goto end;
321 }
322
323 // Get the file's status
324 if(fstat(tf->fd, &lTDFStat) < 0){
325 g_warning("Unable to get the status of the input data file %s\n", fileName);
326 goto close_file;
327 }
328
329 // Is the file large enough to contain a trace
330 if(lTDFStat.st_size <
331 (off_t)(sizeof(struct ltt_block_start_header)
332 + sizeof(struct ltt_trace_header_any))){
333 g_print("The input data file %s does not contain a trace\n", fileName);
334 goto close_file;
335 }
336
337 /* Temporarily map the buffer start header to get trace information */
338 /* Multiple of pages aligned head */
339 tf->buffer.head = mmap(0,
340 PAGE_ALIGN(sizeof(struct ltt_block_start_header)
341 + sizeof(struct ltt_trace_header_any)), PROT_READ,
342 MAP_PRIVATE, tf->fd, 0);
343 if(tf->buffer.head == MAP_FAILED) {
344 perror("Error in allocating memory for buffer of tracefile");
345 goto close_file;
346 }
347 g_assert( ( (guint)tf->buffer.head&(8-1) ) == 0); // make sure it's aligned.
348
349 header = (struct ltt_block_start_header*)tf->buffer.head;
350
351 if(parse_trace_header(header->trace, tf, NULL)) {
352 g_warning("parse_trace_header error");
353 goto unmap_file;
354 }
355
356 //store the size of the file
357 tf->file_size = lTDFStat.st_size;
358 tf->buf_size = ltt_get_uint32(LTT_GET_BO(tf), &header->buf_size);
359 tf->num_blocks = tf->file_size / tf->buf_size;
360
361 if(munmap(tf->buffer.head,
362 PAGE_ALIGN(sizeof(struct ltt_block_start_header)
363 + sizeof(struct ltt_trace_header_any)))) {
364 g_warning("unmap size : %u\n",
365 PAGE_ALIGN(sizeof(struct ltt_block_start_header)
366 + sizeof(struct ltt_trace_header_any)));
367 perror("munmap error");
368 g_assert(0);
369 }
370 tf->buffer.head = NULL;
371
372 //read the first block
373 if(map_block(tf,0)) {
374 perror("Cannot map block for tracefile");
375 goto close_file;
376 }
377
378 return 0;
379
380 /* Error */
381 unmap_file:
382 if(munmap(tf->buffer.head,
383 PAGE_ALIGN(sizeof(struct ltt_block_start_header)
384 + sizeof(struct ltt_trace_header_any)))) {
385 g_warning("unmap size : %u\n",
386 PAGE_ALIGN(sizeof(struct ltt_block_start_header)
387 + sizeof(struct ltt_trace_header_any)));
388 perror("munmap error");
389 g_assert(0);
390 }
391 close_file:
392 close(tf->fd);
393 end:
394 return -1;
395 }
396
397 LttTrace *ltt_tracefile_get_trace(LttTracefile *tf)
398 {
399 return tf->trace;
400 }
401
402 #if 0
403 /*****************************************************************************
404 *Open control and per cpu tracefiles
405 ****************************************************************************/
406
407 void ltt_tracefile_open_cpu(LttTrace *t, gchar * tracefile_name)
408 {
409 LttTracefile * tf;
410 tf = ltt_tracefile_open(t,tracefile_name);
411 if(!tf) return;
412 t->per_cpu_tracefile_number++;
413 g_ptr_array_add(t->per_cpu_tracefiles, tf);
414 }
415
416 gint ltt_tracefile_open_control(LttTrace *t, gchar * control_name)
417 {
418 LttTracefile * tf;
419 LttEvent ev;
420 LttFacility * f;
421 void * pos;
422 FacilityLoad fLoad;
423 unsigned int i;
424
425 tf = ltt_tracefile_open(t,control_name);
426 if(!tf) {
427 g_warning("ltt_tracefile_open_control : bad file descriptor");
428 return -1;
429 }
430 t->control_tracefile_number++;
431 g_ptr_array_add(t->control_tracefiles,tf);
432
433 //parse facilities tracefile to get base_id
434 if(strcmp(&control_name[strlen(control_name)-10],"facilities") ==0){
435 while(1){
436 if(!ltt_tracefile_read(tf,&ev)) return 0; // end of file
437
438 if(ev.event_id == TRACE_FACILITY_LOAD){
439 pos = ev.data;
440 fLoad.name = (gchar*)pos;
441 fLoad.checksum = *(LttChecksum*)(pos + strlen(fLoad.name));
442 fLoad.base_code = *(guint32 *)(pos + strlen(fLoad.name) + sizeof(LttChecksum));
443
444 for(i=0;i<t->facility_number;i++){
445 f = (LttFacility*)g_ptr_array_index(t->facilities,i);
446 if(strcmp(f->name,fLoad.name)==0 && fLoad.checksum==f->checksum){
447 f->base_id = fLoad.base_code;
448 break;
449 }
450 }
451 if(i==t->facility_number) {
452 g_warning("Facility: %s, checksum: %u is not found",
453 fLoad.name,(unsigned int)fLoad.checksum);
454 return -1;
455 }
456 }else if(ev.event_id == TRACE_BLOCK_START){
457 continue;
458 }else if(ev.event_id == TRACE_BLOCK_END){
459 break;
460 }else {
461 g_warning("Not valid facilities trace file");
462 return -1;
463 }
464 }
465 }
466 return 0;
467 }
468 #endif //0
469
470 /*****************************************************************************
471 *Function name
472 * ltt_tracefile_close: close a trace file,
473 *Input params
474 * t : tracefile which will be closed
475 ****************************************************************************/
476
477 void ltt_tracefile_close(LttTracefile *t)
478 {
479 int page_size = getpagesize();
480
481 if(t->buffer.head != NULL)
482 if(munmap(t->buffer.head, PAGE_ALIGN(t->buf_size))) {
483 g_warning("unmap size : %u\n",
484 PAGE_ALIGN(t->buf_size));
485 perror("munmap error");
486 g_assert(0);
487 }
488
489 close(t->fd);
490 }
491
492
493 /*****************************************************************************
494 *Get system information
495 ****************************************************************************/
496 #if 0
497 gint getSystemInfo(LttSystemDescription* des, gchar * pathname)
498 {
499 int fd;
500 GIOChannel *iochan;
501 gchar *buf = NULL;
502 gsize length;
503
504 GMarkupParseContext * context;
505 GError * error = NULL;
506 GMarkupParser markup_parser =
507 {
508 parser_start_element,
509 NULL,
510 parser_characters,
511 NULL, /* passthrough */
512 NULL /* error */
513 };
514
515 fd = g_open(pathname, O_RDONLY, 0);
516 if(fd == -1){
517 g_warning("Can not open file : %s\n", pathname);
518 return -1;
519 }
520
521 iochan = g_io_channel_unix_new(fd);
522
523 context = g_markup_parse_context_new(&markup_parser, 0, des,NULL);
524
525 //while(fgets(buf,DIR_NAME_SIZE, fp) != NULL){
526 while(g_io_channel_read_line(iochan, &buf, &length, NULL, &error)
527 != G_IO_STATUS_EOF) {
528
529 if(error != NULL) {
530 g_warning("Can not read xml file: \n%s\n", error->message);
531 g_error_free(error);
532 }
533 if(!g_markup_parse_context_parse(context, buf, length, &error)){
534 if(error != NULL) {
535 g_warning("Can not parse xml file: \n%s\n", error->message);
536 g_error_free(error);
537 }
538 g_markup_parse_context_free(context);
539
540 g_io_channel_shutdown(iochan, FALSE, &error); /* No flush */
541 if(error != NULL) {
542 g_warning("Can not close file: \n%s\n", error->message);
543 g_error_free(error);
544 }
545
546 close(fd);
547 return -1;
548 }
549 }
550 g_markup_parse_context_free(context);
551
552 g_io_channel_shutdown(iochan, FALSE, &error); /* No flush */
553 if(error != NULL) {
554 g_warning("Can not close file: \n%s\n", error->message);
555 g_error_free(error);
556 }
557
558 g_close(fd);
559
560 g_free(buf);
561 return 0;
562 }
563 #endif //0
564
565 /*****************************************************************************
566 *The following functions get facility/tracefile information
567 ****************************************************************************/
568 #if 0
569 gint getFacilityInfo(LttTrace *t, gchar* eventdefs)
570 {
571 GDir * dir;
572 const gchar * name;
573 unsigned int i,j;
574 LttFacility * f;
575 LttEventType * et;
576 gchar fullname[DIR_NAME_SIZE];
577 GError * error = NULL;
578
579 dir = g_dir_open(eventdefs, 0, &error);
580
581 if(error != NULL) {
582 g_warning("Can not open directory: %s, %s\n", eventdefs, error->message);
583 g_error_free(error);
584 return -1;
585 }
586
587 while((name = g_dir_read_name(dir)) != NULL){
588 if(!g_pattern_match_simple("*.xml", name)) continue;
589 strcpy(fullname,eventdefs);
590 strcat(fullname,name);
591 ltt_facility_open(t,fullname);
592 }
593 g_dir_close(dir);
594
595 for(j=0;j<t->facility_number;j++){
596 f = (LttFacility*)g_ptr_array_index(t->facilities, j);
597 for(i=0; i<f->event_number; i++){
598 et = f->events[i];
599 setFieldsOffset(NULL, et, NULL, t);
600 }
601 }
602 return 0;
603 }
604 #endif //0
605
606 /*****************************************************************************
607 *A trace is specified as a pathname to the directory containing all the
608 *associated data (control tracefiles, per cpu tracefiles, event
609 *descriptions...).
610 *
611 *When a trace is closed, all the associated facilities, types and fields
612 *are released as well.
613 */
614
615
616 /****************************************************************************
617 * get_absolute_pathname
618 *
619 * return the unique pathname in the system
620 *
621 * MD : Fixed this function so it uses realpath, dealing well with
622 * forgotten cases (.. were not used correctly before).
623 *
624 ****************************************************************************/
625 void get_absolute_pathname(const gchar *pathname, gchar * abs_pathname)
626 {
627 abs_pathname[0] = '\0';
628
629 if ( realpath (pathname, abs_pathname) != NULL)
630 return;
631 else
632 {
633 /* error, return the original path unmodified */
634 strcpy(abs_pathname, pathname);
635 return;
636 }
637 return;
638 }
639
640 /* Search for something like : .*_.*
641 *
642 * The left side is the name, the right side is the number.
643 */
644
645 int get_tracefile_name_number(const gchar *raw_name,
646 GQuark *name,
647 guint *num)
648 {
649 guint raw_name_len = strlen(raw_name);
650 gchar char_name[PATH_MAX];
651 int i;
652 int underscore_pos;
653 long int cpu_num;
654 gchar *endptr;
655
656 for(i=raw_name_len-1;i>=0;i--) {
657 if(raw_name[i] == '_') break;
658 }
659 if(i==0) /* Either not found or name length is 0 */
660 return -1;
661 underscore_pos = i;
662
663 cpu_num = strtol(raw_name+underscore_pos+1, &endptr, 10);
664
665 if(endptr == raw_name+underscore_pos+1)
666 return -1; /* No digit */
667 if(cpu_num == LONG_MIN || cpu_num == LONG_MAX)
668 return -1; /* underflow / overflow */
669
670 strncpy(char_name, raw_name, underscore_pos);
671
672 char_name[underscore_pos] = '\0';
673
674 *name = g_quark_from_string(char_name);
675 *num = cpu_num;
676
677 return 0;
678 }
679
680
681 GData **ltt_trace_get_tracefiles_groups(LttTrace *trace)
682 {
683 return &trace->tracefiles;
684 }
685
686
687 void compute_tracefile_group(GQuark key_id,
688 GArray *group,
689 struct compute_tracefile_group_args *args)
690 {
691 int i;
692 LttTracefile *tf;
693
694 for(i=0; i<group->len; i++) {
695 tf = &g_array_index (group, LttTracefile, i);
696 if(tf->cpu_online)
697 args->func(tf, args->func_args);
698 }
699 }
700
701
702 void ltt_tracefile_group_destroy(gpointer data)
703 {
704 GArray *group = (GArray *)data;
705 int i;
706 LttTracefile *tf;
707
708 for(i=0; i<group->len; i++) {
709 tf = &g_array_index (group, LttTracefile, i);
710 if(tf->cpu_online)
711 ltt_tracefile_close(tf);
712 }
713 g_array_free(group, TRUE);
714 }
715
716 gboolean ltt_tracefile_group_has_cpu_online(gpointer data)
717 {
718 GArray *group = (GArray *)data;
719 int i;
720 LttTracefile *tf;
721
722 for(i=0; i<group->len; i++) {
723 tf = &g_array_index (group, LttTracefile, i);
724 if(tf->cpu_online) return 1;
725 }
726 return 0;
727 }
728
729
730 /* Open each tracefile under a specific directory. Put them in a
731 * GData : permits to access them using their tracefile group pathname.
732 * i.e. access control/modules tracefile group by index :
733 * "control/module".
734 *
735 * relative path is the path relative to the trace root
736 * root path is the full path
737 *
738 * A tracefile group is simply an array where all the per cpu tracefiles sits.
739 */
740
741 static int open_tracefiles(LttTrace *trace, gchar *root_path,
742 gchar *relative_path)
743 {
744 DIR *dir = opendir(root_path);
745 struct dirent *entry;
746 struct stat stat_buf;
747 int ret;
748
749 gchar path[PATH_MAX];
750 int path_len;
751 gchar *path_ptr;
752
753 int rel_path_len;
754 gchar rel_path[PATH_MAX];
755 gchar *rel_path_ptr;
756 LttTracefile tmp_tf;
757
758 if(dir == NULL) {
759 perror(root_path);
760 return ENOENT;
761 }
762
763 strncpy(path, root_path, PATH_MAX-1);
764 path_len = strlen(path);
765 path[path_len] = '/';
766 path_len++;
767 path_ptr = path + path_len;
768
769 strncpy(rel_path, relative_path, PATH_MAX-1);
770 rel_path_len = strlen(rel_path);
771 rel_path[rel_path_len] = '/';
772 rel_path_len++;
773 rel_path_ptr = rel_path + rel_path_len;
774
775 while((entry = readdir(dir)) != NULL) {
776
777 if(entry->d_name[0] == '.') continue;
778
779 strncpy(path_ptr, entry->d_name, PATH_MAX - path_len);
780 strncpy(rel_path_ptr, entry->d_name, PATH_MAX - rel_path_len);
781
782 ret = stat(path, &stat_buf);
783 if(ret == -1) {
784 perror(path);
785 continue;
786 }
787
788 g_debug("Tracefile file or directory : %s\n", path);
789
790 if(strcmp(rel_path, "/eventdefs") == 0) continue;
791
792 if(S_ISDIR(stat_buf.st_mode)) {
793
794 g_debug("Entering subdirectory...\n");
795 ret = open_tracefiles(trace, path, rel_path);
796 if(ret < 0) continue;
797 } else if(S_ISREG(stat_buf.st_mode)) {
798 GQuark name;
799 guint num;
800 GArray *group;
801
802 if(get_tracefile_name_number(rel_path, &name, &num))
803 continue; /* invalid name */
804
805 g_debug("Opening file.\n");
806 if(ltt_tracefile_open(trace, path, &tmp_tf)) {
807 g_info("Error opening tracefile %s", path);
808
809 continue; /* error opening the tracefile : bad magic number ? */
810 }
811
812 g_debug("Tracefile name is %s and number is %u",
813 g_quark_to_string(name), num);
814
815 tmp_tf.cpu_online = 1;
816 tmp_tf.cpu_num = num;
817 tmp_tf.name = name;
818
819 group = g_datalist_id_get_data(&trace->tracefiles, name);
820 if(group == NULL) {
821 /* Elements are automatically cleared when the array is allocated.
822 * It makes the cpu_online variable set to 0 : cpu offline, by default.
823 */
824 group = g_array_sized_new (FALSE, TRUE, sizeof(LttTracefile), 10);
825 g_datalist_id_set_data_full(&trace->tracefiles, name,
826 group, ltt_tracefile_group_destroy);
827 }
828
829 /* Add the per cpu tracefile to the named group */
830 unsigned int old_len = group->len;
831 if(num+1 > old_len)
832 group = g_array_set_size(group, num+1);
833 g_array_index (group, LttTracefile, num) = tmp_tf;
834
835 }
836 }
837
838 closedir(dir);
839
840 return 0;
841 }
842
843 /* ltt_get_facility_description
844 *
845 * Opens the file corresponding to the requested facility (identified by fac_id
846 * and checksum).
847 *
848 * The name searched is : %trace root%/eventdefs/facname_checksum.xml
849 *
850 * Returns 0 on success, or 1 on failure.
851 */
852
853 static int ltt_get_facility_description(LttFacility *f,
854 LttTrace *t,
855 LttTracefile *fac_tf)
856 {
857 char desc_file_name[PATH_MAX];
858 const gchar *text;
859 guint textlen;
860 gint err;
861 gint arch_spec;
862 gint fac_name_len;
863
864 text = g_quark_to_string(t->pathname);
865 textlen = strlen(text);
866
867 if(textlen >= PATH_MAX) goto name_error;
868 strcpy(desc_file_name, text);
869
870 text = "/eventdefs/";
871 textlen+=strlen(text);
872 if(textlen >= PATH_MAX) goto name_error;
873 strcat(desc_file_name, text);
874
875 text = g_quark_to_string(f->name);
876 fac_name_len = strlen(text);
877 textlen+=fac_name_len;
878 if(textlen >= PATH_MAX) goto name_error;
879 strcat(desc_file_name, text);
880
881 /* arch specific facilities are named like this : name_arch */
882 if(fac_name_len+1 < sizeof("_arch"))
883 arch_spec = 0;
884 else {
885 if(!strcmp(&text[fac_name_len+1-sizeof("_arch")], "_arch"))
886 arch_spec = 1;
887 else
888 arch_spec = 0;
889 }
890
891 #if 0
892 text = "_";
893 textlen+=strlen(text);
894 if(textlen >= PATH_MAX) goto name_error;
895 strcat(desc_file_name, text);
896
897 err = snprintf(desc_file_name+textlen, PATH_MAX-textlen-1,
898 "%u", f->checksum);
899 if(err < 0) goto name_error;
900
901 textlen=strlen(desc_file_name);
902
903 #endif //0
904
905 if(arch_spec) {
906 switch(t->arch_type) {
907 case LTT_ARCH_TYPE_I386:
908 text = "_i386";
909 break;
910 case LTT_ARCH_TYPE_PPC:
911 text = "_ppc";
912 break;
913 case LTT_ARCH_TYPE_SH:
914 text = "_sh";
915 break;
916 case LTT_ARCH_TYPE_S390:
917 text = "_s390";
918 break;
919 case LTT_ARCH_TYPE_MIPS:
920 text = "_mips";
921 break;
922 case LTT_ARCH_TYPE_ARM:
923 text = "_arm";
924 case LTT_ARCH_TYPE_PPC64:
925 text = "_ppc64";
926 case LTT_ARCH_TYPE_X86_64:
927 text = "_x86_64";
928 break;
929 default:
930 g_error("Trace from unsupported architecture.");
931 }
932 textlen+=strlen(text);
933 if(textlen >= PATH_MAX) goto name_error;
934 strcat(desc_file_name, text);
935 }
936
937 text = ".xml";
938 textlen+=strlen(text);
939 if(textlen >= PATH_MAX) goto name_error;
940 strcat(desc_file_name, text);
941
942 err = ltt_facility_open(f, t, desc_file_name);
943 if(err) goto facility_error;
944
945 return 0;
946
947 facility_error:
948 name_error:
949 return 1;
950 }
951
952 static void ltt_fac_ids_destroy(gpointer data)
953 {
954 GArray *fac_ids = (GArray *)data;
955
956 g_array_free(fac_ids, TRUE);
957 }
958
959
960 /* Presumes the tracefile is already seeked at the beginning. It makes sense,
961 * because it must be done just after the opening */
962 static int ltt_process_facility_tracefile(LttTracefile *tf)
963 {
964 int err;
965 LttFacility *fac;
966 GArray *fac_ids;
967 guint i;
968 LttEventType *et;
969
970 while(1) {
971 err = ltt_tracefile_read_seek(tf);
972 if(err == EPERM) goto seek_error;
973 else if(err == ERANGE) break; /* End of tracefile */
974
975 err = ltt_tracefile_read_update_event(tf);
976 if(err) goto update_error;
977
978 /* We are on a facility load/or facility unload/ or heartbeat event */
979 /* The rules are :
980 * * facility 0 is hardcoded : this is the core facility. It will be shown
981 * in the facility array though, and is shown as "loaded builtin" in the
982 * trace.
983 * It contains event :
984 * 0 : facility load
985 * 1 : facility unload
986 * 2 : state dump facility load
987 * 3 : heartbeat
988 */
989 if(tf->event.facility_id != LTT_FACILITY_CORE) {
990 /* Should only contain core facility */
991 g_warning("Error in processing facility file %s, "
992 "should not contain facility id %u.", g_quark_to_string(tf->name),
993 tf->event.facility_id);
994 err = EPERM;
995 goto fac_id_error;
996 } else {
997
998 struct LttFacilityLoad *fac_load_data;
999 struct LttStateDumpFacilityLoad *fac_state_dump_load_data;
1000 char *fac_name;
1001 void *pos;
1002
1003 // FIXME align
1004 switch((enum ltt_core_events)tf->event.event_id) {
1005 case LTT_EVENT_FACILITY_LOAD:
1006 fac_name = (char*)(tf->event.data);
1007 g_debug("Doing LTT_EVENT_FACILITY_LOAD of facility %s",
1008 fac_name);
1009 pos = (tf->event.data + strlen(fac_name) + 1);
1010 pos += ltt_align((size_t)pos, sizeof(guint32), tf->has_alignment);
1011 fac_load_data = (struct LttFacilityLoad *)pos;
1012
1013 fac = &g_array_index (tf->trace->facilities_by_num, LttFacility,
1014 ltt_get_uint32(LTT_GET_BO(tf), &fac_load_data->id));
1015 /* facility may already exist if trace is paused/unpaused */
1016 if(fac->exists) continue;
1017 fac->name = g_quark_from_string(fac_name);
1018 fac->checksum = ltt_get_uint32(LTT_GET_BO(tf),
1019 &fac_load_data->checksum);
1020 fac->id = ltt_get_uint32(LTT_GET_BO(tf), &fac_load_data->id);
1021 fac->pointer_size = ltt_get_uint32(LTT_GET_BO(tf),
1022 &fac_load_data->pointer_size);
1023 fac->int_size = ltt_get_uint32(LTT_GET_BO(tf),
1024 &fac_load_data->int_size);
1025 fac->long_size = ltt_get_uint32(LTT_GET_BO(tf),
1026 &fac_load_data->long_size);
1027 fac->size_t_size = ltt_get_uint32(LTT_GET_BO(tf),
1028 &fac_load_data->size_t_size);
1029 fac->alignment = ltt_get_uint32(LTT_GET_BO(tf),
1030 &fac_load_data->has_alignment);
1031
1032 if(ltt_get_facility_description(fac, tf->trace, tf))
1033 continue; /* error opening description */
1034
1035 fac->trace = tf->trace;
1036
1037 /* Preset the field offsets */
1038 for(i=0; i<fac->events->len; i++){
1039 et = &g_array_index(fac->events, LttEventType, i);
1040 precompute_offsets(fac, et);
1041 }
1042
1043 fac->exists = 1;
1044
1045 fac_ids = g_datalist_id_get_data(&tf->trace->facilities_by_name,
1046 fac->name);
1047 if(fac_ids == NULL) {
1048 fac_ids = g_array_sized_new (FALSE, TRUE, sizeof(guint), 1);
1049 g_datalist_id_set_data_full(&tf->trace->facilities_by_name,
1050 fac->name,
1051 fac_ids, ltt_fac_ids_destroy);
1052 }
1053 g_array_append_val(fac_ids, fac->id);
1054
1055 break;
1056 case LTT_EVENT_FACILITY_UNLOAD:
1057 g_debug("Doing LTT_EVENT_FACILITY_UNLOAD");
1058 /* We don't care about unload : facilities ID are valid for the whole
1059 * trace. They simply won't be used after the unload. */
1060 break;
1061 case LTT_EVENT_STATE_DUMP_FACILITY_LOAD:
1062 fac_name = (char*)(tf->event.data);
1063 g_debug("Doing LTT_EVENT_STATE_DUMP_FACILITY_LOAD of facility %s",
1064 fac_name);
1065 pos = (tf->event.data + strlen(fac_name) + 1);
1066 pos += ltt_align((size_t)pos, sizeof(guint32), tf->has_alignment);
1067 fac_state_dump_load_data = (struct LttStateDumpFacilityLoad *)pos;
1068
1069 fac = &g_array_index (tf->trace->facilities_by_num, LttFacility,
1070 ltt_get_uint32(LTT_GET_BO(tf), &fac_state_dump_load_data->id));
1071 /* facility may already exist if trace is paused/unpaused */
1072 if(fac->exists) continue;
1073 fac->name = g_quark_from_string(fac_name);
1074 fac->checksum = ltt_get_uint32(LTT_GET_BO(tf),
1075 &fac_state_dump_load_data->checksum);
1076 fac->id = ltt_get_uint32(LTT_GET_BO(tf),
1077 &fac_state_dump_load_data->id);
1078 fac->pointer_size = ltt_get_uint32(LTT_GET_BO(tf),
1079 &fac_state_dump_load_data->pointer_size);
1080 fac->int_size = ltt_get_uint32(LTT_GET_BO(tf),
1081 &fac_state_dump_load_data->int_size);
1082 fac->long_size = ltt_get_uint32(LTT_GET_BO(tf),
1083 &fac_state_dump_load_data->long_size);
1084 fac->size_t_size = ltt_get_uint32(LTT_GET_BO(tf),
1085 &fac_state_dump_load_data->size_t_size);
1086 fac->alignment = ltt_get_uint32(LTT_GET_BO(tf),
1087 &fac_state_dump_load_data->has_alignment);
1088 if(ltt_get_facility_description(fac, tf->trace, tf))
1089 continue; /* error opening description */
1090
1091 fac->trace = tf->trace;
1092
1093 /* Preset the field offsets */
1094 for(i=0; i<fac->events->len; i++){
1095 et = &g_array_index(fac->events, LttEventType, i);
1096 precompute_offsets(fac, et);
1097 }
1098
1099 fac->exists = 1;
1100
1101 fac_ids = g_datalist_id_get_data(&tf->trace->facilities_by_name,
1102 fac->name);
1103 if(fac_ids == NULL) {
1104 fac_ids = g_array_sized_new (FALSE, TRUE, sizeof(guint), 1);
1105 g_datalist_id_set_data_full(&tf->trace->facilities_by_name,
1106 fac->name,
1107 fac_ids, ltt_fac_ids_destroy);
1108 }
1109 g_array_append_val(fac_ids, fac->id);
1110
1111 break;
1112 case LTT_EVENT_HEARTBEAT:
1113 break;
1114 default:
1115 g_warning("Error in processing facility file %s, "
1116 "unknown event id %hhu in core facility.",
1117 g_quark_to_string(tf->name),
1118 tf->event.event_id);
1119 err = EPERM;
1120 goto event_id_error;
1121 }
1122 }
1123 }
1124 return 0;
1125
1126 /* Error handling */
1127 event_id_error:
1128 fac_id_error:
1129 update_error:
1130 seek_error:
1131 g_warning("An error occured in facility tracefile parsing");
1132 return err;
1133 }
1134
1135
1136 LttTrace *ltt_trace_open(const gchar *pathname)
1137 {
1138 gchar abs_path[PATH_MAX];
1139 LttTrace * t;
1140 LttTracefile *tf;
1141 GArray *group;
1142 int i, ret;
1143 struct ltt_block_start_header *header;
1144 DIR *dir;
1145 struct dirent *entry;
1146 guint control_found = 0;
1147 guint eventdefs_found = 0;
1148 struct stat stat_buf;
1149 gchar path[PATH_MAX];
1150
1151 t = g_new(LttTrace, 1);
1152 if(!t) goto alloc_error;
1153
1154 get_absolute_pathname(pathname, abs_path);
1155 t->pathname = g_quark_from_string(abs_path);
1156
1157 g_datalist_init(&t->tracefiles);
1158
1159 /* Test to see if it looks like a trace */
1160 dir = opendir(abs_path);
1161 if(dir == NULL) {
1162 perror(abs_path);
1163 goto open_error;
1164 }
1165 while((entry = readdir(dir)) != NULL) {
1166 strcpy(path, abs_path);
1167 strcat(path, "/");
1168 strcat(path, entry->d_name);
1169 ret = stat(path, &stat_buf);
1170 if(ret == -1) {
1171 perror(path);
1172 continue;
1173 }
1174 if(S_ISDIR(stat_buf.st_mode)) {
1175 if(strcmp(entry->d_name, "control") == 0) {
1176 control_found = 1;
1177 }
1178 if(strcmp(entry->d_name, "eventdefs") == 0) {
1179 eventdefs_found = 1;
1180 }
1181 }
1182 }
1183 closedir(dir);
1184
1185 if(!control_found || !eventdefs_found) goto find_error;
1186
1187 /* Open all the tracefiles */
1188 if(open_tracefiles(t, abs_path, "")) {
1189 g_warning("Error opening tracefile %s", abs_path);
1190 goto find_error;
1191 }
1192
1193 /* Prepare the facilities containers : array and mapping */
1194 /* Array is zeroed : the "exists" field is set to false by default */
1195 t->facilities_by_num = g_array_sized_new (FALSE,
1196 TRUE, sizeof(LttFacility),
1197 NUM_FACILITIES);
1198 t->facilities_by_num = g_array_set_size(t->facilities_by_num, NUM_FACILITIES);
1199
1200 g_datalist_init(&t->facilities_by_name);
1201
1202 /* Parse each trace control/facilitiesN files : get runtime fac. info */
1203 group = g_datalist_id_get_data(&t->tracefiles, LTT_TRACEFILE_NAME_FACILITIES);
1204 if(group == NULL) {
1205 g_error("Trace %s has no facility tracefile", abs_path);
1206 g_assert(0);
1207 goto facilities_error;
1208 }
1209
1210 /* Get the trace information for the control/facility 0 tracefile */
1211 g_assert(group->len > 0);
1212 tf = &g_array_index (group, LttTracefile, 0);
1213 header = (struct ltt_block_start_header*)tf->buffer.head;
1214 g_assert(parse_trace_header(header->trace,
1215 tf, t) == 0);
1216
1217 t->num_cpu = group->len;
1218
1219 for(i=0; i<group->len; i++) {
1220 tf = &g_array_index (group, LttTracefile, i);
1221 if(ltt_process_facility_tracefile(tf))
1222 goto facilities_error;
1223 }
1224
1225 return t;
1226
1227 /* Error handling */
1228 facilities_error:
1229 g_datalist_clear(&t->facilities_by_name);
1230 g_array_free(t->facilities_by_num, TRUE);
1231 find_error:
1232 g_datalist_clear(&t->tracefiles);
1233 open_error:
1234 g_free(t);
1235 alloc_error:
1236 return NULL;
1237
1238 }
1239
1240 GQuark ltt_trace_name(const LttTrace *t)
1241 {
1242 return t->pathname;
1243 }
1244
1245
1246 /******************************************************************************
1247 * When we copy a trace, we want all the opening actions to happen again :
1248 * the trace will be reopened and totally independant from the original.
1249 * That's why we call ltt_trace_open.
1250 *****************************************************************************/
1251 LttTrace *ltt_trace_copy(LttTrace *self)
1252 {
1253 return ltt_trace_open(g_quark_to_string(self->pathname));
1254 }
1255
1256 void ltt_trace_close(LttTrace *t)
1257 {
1258 guint i;
1259 LttFacility *fac;
1260
1261 for(i=0; i<t->facilities_by_num->len; i++) {
1262 fac = &g_array_index (t->facilities_by_num, LttFacility, i);
1263 if(fac->exists)
1264 ltt_facility_close(fac);
1265 }
1266
1267 g_datalist_clear(&t->facilities_by_name);
1268 g_array_free(t->facilities_by_num, TRUE);
1269 g_datalist_clear(&t->tracefiles);
1270 g_free(t);
1271 }
1272
1273
1274 /*****************************************************************************
1275 *Get the system description of the trace
1276 ****************************************************************************/
1277
1278 LttFacility *ltt_trace_facility_by_id(LttTrace *t, guint8 id)
1279 {
1280 g_assert(id < t->facilities_by_num->len);
1281 return &g_array_index(t->facilities_by_num, LttFacility, id);
1282 }
1283
1284 /* ltt_trace_facility_get_by_name
1285 *
1286 * Returns the GArray of facility indexes. All the fac_ids that matches the
1287 * requested facility name.
1288 *
1289 * If name is not found, returns NULL.
1290 */
1291 GArray *ltt_trace_facility_get_by_name(LttTrace *t, GQuark name)
1292 {
1293 return g_datalist_id_get_data(&t->facilities_by_name, name);
1294 }
1295
1296 /*****************************************************************************
1297 * Functions to discover all the event types in the trace
1298 ****************************************************************************/
1299
1300 #if 0
1301 unsigned ltt_trace_eventtype_number(LttTrace *t)
1302 {
1303 unsigned int i;
1304 unsigned count = 0;
1305 unsigned int num = t->facility_number;
1306 LttFacility * f;
1307
1308 for(i=0;i<num;i++){
1309 f = (LttFacility*)g_ptr_array_index(t->facilities, i);
1310 count += f->event_number;
1311 }
1312 return count;
1313 }
1314 #endif //0
1315
1316 #if 0
1317 //use an iteration on all the trace facilities, and inside iteration on all the
1318 //event types in each facilities instead.
1319 LttEventType *ltt_trace_eventtype_get(LttTrace *t, unsigned evId)
1320 {
1321 LttEventType *event_type;
1322
1323 LttFacility * f;
1324 f = ltt_trace_facility_by_id(t,evId);
1325
1326 if(unlikely(!f)) event_type = NULL;
1327 else event_type = f->events[evId - f->base_id];
1328
1329 return event_type;
1330 }
1331 #endif //0
1332
1333 #if 0
1334 /*****************************************************************************
1335 * ltt_trace_find_tracefile
1336 *
1337 * Find a tracefile by name and index in the group.
1338 *
1339 * Returns a pointer to the tracefiles, else NULL.
1340 ****************************************************************************/
1341
1342 LttTracefile *ltt_trace_find_tracefile(LttTrace *t, const gchar *name)
1343 {
1344 }
1345 #endif //0
1346
1347 /*****************************************************************************
1348 * Get the start time and end time of the trace
1349 ****************************************************************************/
1350
1351 static void ltt_tracefile_time_span_get(LttTracefile *tf,
1352 LttTime *start, LttTime *end)
1353 {
1354 int err;
1355
1356 err = map_block(tf, 0);
1357 if(unlikely(err)) {
1358 g_error("Can not map block");
1359 *start = ltt_time_infinite;
1360 } else
1361 *start = tf->buffer.begin.timestamp;
1362
1363 err = map_block(tf, tf->num_blocks - 1); /* Last block */
1364 if(unlikely(err)) {
1365 g_error("Can not map block");
1366 *end = ltt_time_zero;
1367 } else
1368 *end = tf->buffer.end.timestamp;
1369 }
1370
1371 struct tracefile_time_span_get_args {
1372 LttTrace *t;
1373 LttTime *start;
1374 LttTime *end;
1375 };
1376
1377 static void group_time_span_get(GQuark name, gpointer data, gpointer user_data)
1378 {
1379 struct tracefile_time_span_get_args *args =
1380 (struct tracefile_time_span_get_args*)user_data;
1381
1382 GArray *group = (GArray *)data;
1383 int i;
1384 LttTracefile *tf;
1385 LttTime tmp_start;
1386 LttTime tmp_end;
1387
1388 for(i=0; i<group->len; i++) {
1389 tf = &g_array_index (group, LttTracefile, i);
1390 if(tf->cpu_online) {
1391 ltt_tracefile_time_span_get(tf, &tmp_start, &tmp_end);
1392 if(ltt_time_compare(*args->start, tmp_start)>0) *args->start = tmp_start;
1393 if(ltt_time_compare(*args->end, tmp_end)<0) *args->end = tmp_end;
1394 }
1395 }
1396 }
1397
1398 void ltt_trace_time_span_get(LttTrace *t, LttTime *start, LttTime *end)
1399 {
1400 LttTime min_start = ltt_time_infinite;
1401 LttTime max_end = ltt_time_zero;
1402 struct tracefile_time_span_get_args args = { t, &min_start, &max_end };
1403
1404 g_datalist_foreach(&t->tracefiles, &group_time_span_get, &args);
1405
1406 if(start != NULL) *start = min_start;
1407 if(end != NULL) *end = max_end;
1408
1409 }
1410
1411
1412 /*****************************************************************************
1413 *Get the name of a tracefile
1414 ****************************************************************************/
1415
1416 GQuark ltt_tracefile_name(const LttTracefile *tf)
1417 {
1418 return tf->name;
1419 }
1420
1421 GQuark ltt_tracefile_long_name(const LttTracefile *tf)
1422 {
1423 return tf->long_name;
1424 }
1425
1426
1427
1428 guint ltt_tracefile_num(LttTracefile *tf)
1429 {
1430 return tf->cpu_num;
1431 }
1432
1433 /*****************************************************************************
1434 * Get the number of blocks in the tracefile
1435 ****************************************************************************/
1436
1437 guint ltt_tracefile_block_number(LttTracefile *tf)
1438 {
1439 return tf->num_blocks;
1440 }
1441
1442
1443 /* Seek to the first event in a tracefile that has a time equal or greater than
1444 * the time passed in parameter.
1445 *
1446 * If the time parameter is outside the tracefile time span, seek to the first
1447 * event or if after, return ERANGE.
1448 *
1449 * If the time parameter is before the first event, we have to seek specially to
1450 * there.
1451 *
1452 * If the time is after the end of the trace, return ERANGE.
1453 *
1454 * Do a binary search to find the right block, then a sequential search in the
1455 * block to find the event.
1456 *
1457 * In the special case where the time requested fits inside a block that has no
1458 * event corresponding to the requested time, the first event of the next block
1459 * will be seeked.
1460 *
1461 * IMPORTANT NOTE : // FIXME everywhere...
1462 *
1463 * You MUST NOT do a ltt_tracefile_read right after a ltt_tracefile_seek_time :
1464 * you will jump over an event if you do.
1465 *
1466 * Return value : 0 : no error, the tf->event can be used
1467 * ERANGE : time if after the last event of the trace
1468 * otherwise : this is an error.
1469 *
1470 * */
1471
1472 int ltt_tracefile_seek_time(LttTracefile *tf, LttTime time)
1473 {
1474 int ret = 0;
1475 int err;
1476 unsigned int block_num, high, low;
1477
1478 /* seek at the beginning of trace */
1479 err = map_block(tf, 0); /* First block */
1480 if(unlikely(err)) {
1481 g_error("Can not map block");
1482 goto fail;
1483 }
1484
1485 /* If the time is lower or equal the beginning of the trace,
1486 * go to the first event. */
1487 if(ltt_time_compare(time, tf->buffer.begin.timestamp) <= 0) {
1488 ret = ltt_tracefile_read(tf);
1489 if(ret == ERANGE) goto range;
1490 else if (ret) goto fail;
1491 goto found; /* There is either no event in the trace or the event points
1492 to the first event in the trace */
1493 }
1494
1495 err = map_block(tf, tf->num_blocks - 1); /* Last block */
1496 if(unlikely(err)) {
1497 g_error("Can not map block");
1498 goto fail;
1499 }
1500
1501 /* If the time is after the end of the trace, return ERANGE. */
1502 if(ltt_time_compare(time, tf->buffer.end.timestamp) > 0) {
1503 goto range;
1504 }
1505
1506 /* Binary search the block */
1507 high = tf->num_blocks - 1;
1508 low = 0;
1509
1510 while(1) {
1511 block_num = ((high-low) / 2) + low;
1512
1513 err = map_block(tf, block_num);
1514 if(unlikely(err)) {
1515 g_error("Can not map block");
1516 goto fail;
1517 }
1518 if(high == low) {
1519 /* We cannot divide anymore : this is what would happen if the time
1520 * requested was exactly between two consecutive buffers'end and start
1521 * timestamps. This is also what would happend if we didn't deal with out
1522 * of span cases prior in this function. */
1523 /* The event is right in the buffer!
1524 * (or in the next buffer first event) */
1525 while(1) {
1526 ret = ltt_tracefile_read(tf);
1527 if(ret == ERANGE) goto range; /* ERANGE or EPERM */
1528 else if(ret) goto fail;
1529
1530 if(ltt_time_compare(time, tf->event.event_time) <= 0)
1531 goto found;
1532 }
1533
1534 } else if(ltt_time_compare(time, tf->buffer.begin.timestamp) < 0) {
1535 /* go to lower part */
1536 high = block_num - 1;
1537 } else if(ltt_time_compare(time, tf->buffer.end.timestamp) > 0) {
1538 /* go to higher part */
1539 low = block_num + 1;
1540 } else {/* The event is right in the buffer!
1541 (or in the next buffer first event) */
1542 while(1) {
1543 ret = ltt_tracefile_read(tf);
1544 if(ret == ERANGE) goto range; /* ERANGE or EPERM */
1545 else if(ret) goto fail;
1546
1547 if(ltt_time_compare(time, tf->event.event_time) <= 0)
1548 break;
1549 }
1550 goto found;
1551 }
1552 }
1553
1554 found:
1555 return 0;
1556 range:
1557 return ERANGE;
1558
1559 /* Error handling */
1560 fail:
1561 g_error("ltt_tracefile_seek_time failed on tracefile %s",
1562 g_quark_to_string(tf->name));
1563 return EPERM;
1564 }
1565
1566
1567 int ltt_tracefile_seek_position(LttTracefile *tf, const LttEventPosition *ep) {
1568
1569 int err;
1570
1571 if(ep->tracefile != tf) {
1572 goto fail;
1573 }
1574
1575 err = map_block(tf, ep->block);
1576 if(unlikely(err)) {
1577 g_error("Can not map block");
1578 goto fail;
1579 }
1580
1581 tf->event.offset = ep->offset;
1582
1583 err = ltt_tracefile_read_update_event(tf);
1584 if(err) goto fail;
1585 err = ltt_tracefile_read_op(tf);
1586 if(err) goto fail;
1587
1588 return 0;
1589
1590 fail:
1591 g_error("ltt_tracefile_seek_time failed on tracefile %s",
1592 g_quark_to_string(tf->name));
1593 return 1;
1594 }
1595
1596 /* Calculate the real event time based on the buffer boundaries */
1597 LttTime ltt_interpolate_time(LttTracefile *tf, LttEvent *event)
1598 {
1599 LttTime time;
1600
1601 g_assert(tf->trace->has_tsc);
1602
1603 // time = ltt_time_from_uint64(
1604 // cycles_2_ns(tf, (guint64)(tf->buffer.tsc - tf->buffer.begin.cycle_count)));
1605 time = ltt_time_from_uint64(
1606 (double)(tf->buffer.tsc - tf->trace->start_tsc) * 1000000.0
1607 / (double)tf->trace->start_freq);
1608 //time = ltt_time_add(tf->buffer.begin.timestamp, time);
1609 time = ltt_time_add(tf->trace->start_time_from_tsc, time);
1610
1611 return time;
1612 }
1613
1614
1615 /* Get the current event of the tracefile : valid until the next read */
1616 LttEvent *ltt_tracefile_get_event(LttTracefile *tf)
1617 {
1618 return &tf->event;
1619 }
1620
1621
1622
1623 /*****************************************************************************
1624 *Function name
1625 * ltt_tracefile_read : Read the next event in the tracefile
1626 *Input params
1627 * t : tracefile
1628 *Return value
1629 *
1630 * Returns 0 if an event can be used in tf->event.
1631 * Returns ERANGE on end of trace. The event in tf->event still can be used
1632 * (if the last block was not empty).
1633 * Returns EPERM on error.
1634 *
1635 * This function does make the tracefile event structure point to the event
1636 * currently pointed to by the tf->event.
1637 *
1638 * Note : you must call a ltt_tracefile_seek to the beginning of the trace to
1639 * reinitialize it after an error if you want results to be coherent.
1640 * It would be the case if a end of trace last buffer has no event : the end
1641 * of trace wouldn't be returned, but an error.
1642 * We make the assumption there is at least one event per buffer.
1643 ****************************************************************************/
1644
1645 int ltt_tracefile_read(LttTracefile *tf)
1646 {
1647 int err;
1648
1649 err = ltt_tracefile_read_seek(tf);
1650 if(err) return err;
1651 err = ltt_tracefile_read_update_event(tf);
1652 if(err) return err;
1653 err = ltt_tracefile_read_op(tf);
1654 if(err) return err;
1655
1656 return 0;
1657 }
1658
1659 int ltt_tracefile_read_seek(LttTracefile *tf)
1660 {
1661 int err;
1662
1663 /* Get next buffer until we finally have an event, or end of trace */
1664 while(1) {
1665 err = ltt_seek_next_event(tf);
1666 if(unlikely(err == ENOPROTOOPT)) {
1667 return EPERM;
1668 }
1669
1670 /* Are we at the end of the buffer ? */
1671 if(err == ERANGE) {
1672 if(unlikely(tf->buffer.index == tf->num_blocks-1)){ /* end of trace ? */
1673 return ERANGE;
1674 } else {
1675 /* get next block */
1676 err = map_block(tf, tf->buffer.index + 1);
1677 if(unlikely(err)) {
1678 g_error("Can not map block");
1679 return EPERM;
1680 }
1681 }
1682 } else break; /* We found an event ! */
1683 }
1684
1685 return 0;
1686 }
1687
1688
1689 /* do specific operation on events */
1690 int ltt_tracefile_read_op(LttTracefile *tf)
1691 {
1692 LttEvent *event;
1693
1694 event = &tf->event;
1695
1696 /* do event specific operation */
1697
1698 /* do something if its an heartbeat event : increment the heartbeat count */
1699 //if(event->facility_id == LTT_FACILITY_CORE)
1700 // if(event->event_id == LTT_EVENT_HEARTBEAT)
1701 // tf->cur_heart_beat_number++;
1702
1703 return 0;
1704 }
1705
1706
1707 /* same as ltt_tracefile_read, but does not seek to the next event nor call
1708 * event specific operation. */
1709 int ltt_tracefile_read_update_event(LttTracefile *tf)
1710 {
1711 void * pos;
1712 LttEvent *event;
1713
1714 event = &tf->event;
1715 pos = tf->buffer.head + event->offset;
1716
1717 /* Read event header */
1718
1719 /* Align the head */
1720 pos += ltt_align((size_t)pos, tf->trace->arch_size, tf->has_alignment);
1721
1722 if(tf->trace->has_tsc) {
1723 if(tf->trace->has_heartbeat) {
1724 event->time.timestamp = ltt_get_uint32(LTT_GET_BO(tf),
1725 pos);
1726 /* 32 bits -> 64 bits tsc */
1727 /* note : still works for seek and non seek cases. */
1728 if(event->time.timestamp < (0xFFFFFFFFULL&tf->buffer.tsc)) {
1729 tf->buffer.tsc = ((tf->buffer.tsc&0xFFFFFFFF00000000ULL)
1730 + 0x100000000ULL)
1731 | (guint64)event->time.timestamp;
1732 event->tsc = tf->buffer.tsc;
1733 } else {
1734 /* no overflow */
1735 tf->buffer.tsc = (tf->buffer.tsc&0xFFFFFFFF00000000ULL)
1736 | (guint64)event->time.timestamp;
1737 event->tsc = tf->buffer.tsc;
1738 }
1739 pos += sizeof(guint32);
1740 } else {
1741 event->tsc = ltt_get_uint64(LTT_GET_BO(tf), pos);
1742 tf->buffer.tsc = event->tsc;
1743 pos += sizeof(guint64);
1744 }
1745
1746 event->event_time = ltt_interpolate_time(tf, event);
1747 } else {
1748 event->time.delta.tv_sec = 0;
1749 event->time.delta.tv_nsec = ltt_get_uint32(LTT_GET_BO(tf),
1750 pos) * NSEC_PER_USEC;
1751 tf->buffer.tsc = 0;
1752 event->tsc = tf->buffer.tsc;
1753
1754 event->event_time = ltt_time_add(tf->buffer.begin.timestamp,
1755 event->time.delta);
1756 pos += sizeof(guint32);
1757 }
1758
1759 event->facility_id = *(guint8*)pos;
1760 pos += sizeof(guint8);
1761
1762 event->event_id = *(guint8*)pos;
1763 pos += sizeof(guint8);
1764
1765 event->event_size = ltt_get_uint16(LTT_GET_BO(tf), pos);
1766 pos += sizeof(guint16);
1767
1768 /* Align the head */
1769 pos += ltt_align((size_t)pos, tf->trace->arch_size, tf->has_alignment);
1770
1771 event->data = pos;
1772
1773 /* get the data size and update the event fields with the current
1774 * information */
1775 ltt_update_event_size(tf);
1776
1777 return 0;
1778 }
1779
1780
1781 /****************************************************************************
1782 *Function name
1783 * map_block : map a block from the file
1784 *Input Params
1785 * lttdes : ltt trace file
1786 * whichBlock : the block which will be read
1787 *return value
1788 * 0 : success
1789 * EINVAL : lseek fail
1790 * EIO : can not read from the file
1791 ****************************************************************************/
1792
1793 static gint map_block(LttTracefile * tf, guint block_num)
1794 {
1795 int page_size = getpagesize();
1796 struct ltt_block_start_header *header;
1797
1798 g_assert(block_num < tf->num_blocks);
1799
1800 if(tf->buffer.head != NULL) {
1801 if(munmap(tf->buffer.head, PAGE_ALIGN(tf->buf_size))) {
1802 g_warning("unmap size : %u\n",
1803 PAGE_ALIGN(tf->buf_size));
1804 perror("munmap error");
1805 g_assert(0);
1806 }
1807 }
1808
1809
1810 /* Multiple of pages aligned head */
1811 tf->buffer.head = mmap(0,
1812 PAGE_ALIGN(tf->buf_size),
1813 PROT_READ, MAP_PRIVATE, tf->fd,
1814 PAGE_ALIGN((off_t)tf->buf_size * (off_t)block_num));
1815
1816 if(tf->buffer.head == MAP_FAILED) {
1817 perror("Error in allocating memory for buffer of tracefile");
1818 g_assert(0);
1819 goto map_error;
1820 }
1821 g_assert( ( (guint)tf->buffer.head&(8-1) ) == 0); // make sure it's aligned.
1822
1823
1824 tf->buffer.index = block_num;
1825
1826 header = (struct ltt_block_start_header*)tf->buffer.head;
1827
1828 #if 0
1829 tf->buffer.begin.timestamp = ltt_time_add(
1830 ltt_time_from_uint64(
1831 ltt_get_uint64(LTT_GET_BO(tf),
1832 &header->begin.timestamp)
1833 - tf->trace->start_monotonic),
1834 tf->trace->start_time);
1835 #endif //0
1836 //g_debug("block %u begin : %lu.%lu", block_num,
1837 // tf->buffer.begin.timestamp.tv_sec, tf->buffer.begin.timestamp.tv_nsec);
1838 tf->buffer.begin.cycle_count = ltt_get_uint64(LTT_GET_BO(tf),
1839 &header->begin.cycle_count);
1840 tf->buffer.begin.freq = ltt_get_uint64(LTT_GET_BO(tf),
1841 &header->begin.freq);
1842 tf->buffer.begin.timestamp = ltt_time_add(
1843 ltt_time_from_uint64(
1844 (double)(tf->buffer.begin.cycle_count
1845 - tf->trace->start_tsc) * 1000000.0
1846 / (double)tf->trace->start_freq),
1847 tf->trace->start_time_from_tsc);
1848 #if 0
1849
1850 tf->buffer.end.timestamp = ltt_time_add(
1851 ltt_time_from_uint64(
1852 ltt_get_uint64(LTT_GET_BO(tf),
1853 &header->end.timestamp)
1854 - tf->trace->start_monotonic),
1855 tf->trace->start_time);
1856 #endif //0
1857 //g_debug("block %u end : %lu.%lu", block_num,
1858 // tf->buffer.end.timestamp.tv_sec, tf->buffer.end.timestamp.tv_nsec);
1859 tf->buffer.end.cycle_count = ltt_get_uint64(LTT_GET_BO(tf),
1860 &header->end.cycle_count);
1861 tf->buffer.end.freq = ltt_get_uint64(LTT_GET_BO(tf),
1862 &header->end.freq);
1863 tf->buffer.lost_size = ltt_get_uint32(LTT_GET_BO(tf),
1864 &header->lost_size);
1865 tf->buffer.end.timestamp = ltt_time_add(
1866 ltt_time_from_uint64(
1867 (double)(tf->buffer.end.cycle_count
1868 - tf->trace->start_tsc) * 1000000.0
1869 / (double)tf->trace->start_freq),
1870 tf->trace->start_time_from_tsc);
1871
1872 tf->buffer.tsc = tf->buffer.begin.cycle_count;
1873 tf->event.tsc = tf->buffer.tsc;
1874 tf->buffer.freq = tf->buffer.begin.freq;
1875
1876 /* FIXME
1877 * eventually support variable buffer size : will need a partial pre-read of
1878 * the headers to create an index when we open the trace... eventually. */
1879 g_assert(tf->buf_size == ltt_get_uint32(LTT_GET_BO(tf),
1880 &header->buf_size));
1881
1882 /* Now that the buffer is mapped, calculate the time interpolation for the
1883 * block. */
1884
1885 // tf->buffer.nsecs_per_cycle = calc_nsecs_per_cycle(tf);
1886 //tf->buffer.cyc2ns_scale = calc_nsecs_per_cycle(tf);
1887
1888 /* Make the current event point to the beginning of the buffer :
1889 * it means that the event read must get the first event. */
1890 tf->event.tracefile = tf;
1891 tf->event.block = block_num;
1892 tf->event.offset = 0;
1893
1894 return 0;
1895
1896 map_error:
1897 return -errno;
1898
1899 }
1900
1901 /* It will update the fields offsets too */
1902 void ltt_update_event_size(LttTracefile *tf)
1903 {
1904 off_t size = 0;
1905
1906 /* Specific handling of core events : necessary to read the facility control
1907 * tracefile. */
1908 LttFacility *f = ltt_trace_get_facility_by_num(tf->trace,
1909 tf->event.facility_id);
1910
1911 if(likely(tf->event.facility_id == LTT_FACILITY_CORE)) {
1912 switch((enum ltt_core_events)tf->event.event_id) {
1913 case LTT_EVENT_FACILITY_LOAD:
1914 size = strlen((char*)tf->event.data) + 1;
1915 //g_debug("Update Event facility load of facility %s", (char*)tf->event.data);
1916 size += ltt_align(size, sizeof(guint32), tf->has_alignment);
1917 size += sizeof(struct LttFacilityLoad);
1918 break;
1919 case LTT_EVENT_FACILITY_UNLOAD:
1920 //g_debug("Update Event facility unload");
1921 size = sizeof(struct LttFacilityUnload);
1922 break;
1923 case LTT_EVENT_STATE_DUMP_FACILITY_LOAD:
1924 size = strlen((char*)tf->event.data) + 1;
1925 size += ltt_align(size, sizeof(guint32), tf->has_alignment);
1926 //g_debug("Update Event facility load state dump of facility %s",
1927 // (char*)tf->event.data);
1928 size += sizeof(struct LttStateDumpFacilityLoad);
1929 break;
1930 case LTT_EVENT_HEARTBEAT:
1931 //g_debug("Update Event heartbeat");
1932 size = sizeof(TimeHeartbeat);
1933 break;
1934 default:
1935 g_warning("Error in getting event size : tracefile %s, "
1936 "unknown event id %hhu in core facility.",
1937 g_quark_to_string(tf->name),
1938 tf->event.event_id);
1939 goto event_id_error;
1940
1941 }
1942 } else {
1943 if(!f->exists) {
1944 g_error("Unknown facility %hhu (0x%hhx) in tracefile %s",
1945 tf->event.facility_id,
1946 tf->event.facility_id,
1947 g_quark_to_string(tf->name));
1948 goto facility_error;
1949 }
1950
1951 LttEventType *event_type =
1952 ltt_facility_eventtype_get(f, tf->event.event_id);
1953
1954 if(!event_type) {
1955 g_error("Unknown event id %hhu in facility %s in tracefile %s",
1956 tf->event.event_id,
1957 g_quark_to_string(f->name),
1958 g_quark_to_string(tf->name));
1959 goto event_type_error;
1960 }
1961
1962 /* Compute the dynamic offsets */
1963 compute_offsets(tf, f, event_type, &size, tf->event.data);
1964
1965 //g_debug("Event root field : f.e %hhu.%hhu size %zd",
1966 // tf->event.facility_id,
1967 // tf->event.event_id, size);
1968 }
1969
1970 tf->event.data_size = size;
1971
1972 /* Check consistency between kernel and LTTV structure sizes */
1973 g_assert(tf->event.data_size == tf->event.event_size);
1974
1975 return;
1976
1977 facility_error:
1978 event_type_error:
1979 event_id_error:
1980 tf->event.data_size = 0;
1981 }
1982
1983
1984 /* Take the tf current event offset and use the event facility id and event id
1985 * to figure out where is the next event offset.
1986 *
1987 * This is an internal function not aiming at being used elsewhere : it will
1988 * not jump over the current block limits. Please consider using
1989 * ltt_tracefile_read to do this.
1990 *
1991 * Returns 0 on success
1992 * ERANGE if we are at the end of the buffer.
1993 * ENOPROTOOPT if an error occured when getting the current event size.
1994 */
1995 static int ltt_seek_next_event(LttTracefile *tf)
1996 {
1997 int ret = 0;
1998 void *pos;
1999
2000 /* seek over the buffer header if we are at the buffer start */
2001 if(tf->event.offset == 0) {
2002 tf->event.offset += tf->buffer_header_size;
2003
2004 if(tf->event.offset == tf->buf_size - tf->buffer.lost_size) {
2005 ret = ERANGE;
2006 }
2007 goto found;
2008 }
2009
2010
2011 pos = tf->event.data;
2012
2013 if(tf->event.data_size < 0) goto error;
2014
2015 pos += (size_t)tf->event.data_size;
2016
2017 tf->event.offset = pos - tf->buffer.head;
2018
2019 if(tf->event.offset == tf->buf_size - tf->buffer.lost_size) {
2020 ret = ERANGE;
2021 goto found;
2022 }
2023 g_assert(tf->event.offset < tf->buf_size - tf->buffer.lost_size);
2024
2025 found:
2026 return ret;
2027
2028 error:
2029 g_error("Error in ltt_seek_next_event for tracefile %s",
2030 g_quark_to_string(tf->name));
2031 return ENOPROTOOPT;
2032 }
2033
2034 #if 0
2035 /*****************************************************************************
2036 *Function name
2037 * calc_nsecs_per_cycle : calculate nsecs per cycle for current block
2038 *
2039 * 1.0 / (freq(khz) *1000) * 1000000000
2040 *Input Params
2041 * t : tracefile
2042 ****************************************************************************/
2043 /* from timer_tsc.c */
2044 #define CYC2NS_SCALE_FACTOR 10
2045 static guint32 calc_nsecs_per_cycle(LttTracefile * tf)
2046 {
2047 //return 1e6 / (double)tf->buffer.freq;
2048 guint32 cpu_mhz = tf->buffer.freq / 1000;
2049 guint32 cyc2ns_scale = (1000 << CYC2NS_SCALE_FACTOR)/cpu_mhz;
2050
2051 return cyc2ns_scale;
2052 // return 1e6 / (double)tf->buffer.freq;
2053 }
2054
2055 static guint64 cycles_2_ns(LttTracefile *tf, guint64 cycles)
2056 {
2057 return (cycles * tf->buffer.cyc2ns_scale) >> CYC2NS_SCALE_FACTOR;
2058 }
2059 #endif //0
2060
2061 #if 0
2062 void setFieldsOffset(LttTracefile *tf, LttEventType *evT,void *evD)
2063 {
2064 LttField * rootFld = evT->root_field;
2065 // rootFld->base_address = evD;
2066
2067 if(likely(rootFld))
2068 rootFld->field_size = getFieldtypeSize(tf, evT->facility,
2069 evT, 0,0,rootFld, evD);
2070 }
2071 #endif //0
2072 #if 0
2073 /*****************************************************************************
2074 *Function name
2075 * set_fields_offsets : set the precomputable offset of the fields
2076 *Input params
2077 * tracefile : opened trace file
2078 * event_type : the event type
2079 ****************************************************************************/
2080
2081 void set_fields_offsets(LttTracefile *tf, LttEventType *event_type)
2082 {
2083 LttField *field = event_type->root_field;
2084 enum field_status fixed_root = FIELD_FIXED, fixed_parent = FIELD_FIXED;
2085
2086 if(likely(field))
2087 preset_field_type_size(tf, event_type, 0, 0,
2088 &fixed_root, &fixed_parent,
2089 field);
2090
2091 }
2092 #endif //0
2093
2094
2095 /*****************************************************************************
2096 *Function name
2097 * get_alignment : Get the alignment needed for a field.
2098 *Input params
2099 * field : field
2100 *
2101 * returns : The size on which it must be aligned.
2102 *
2103 ****************************************************************************/
2104 off_t get_alignment(LttField *field)
2105 {
2106 LttType *type = &field->field_type;
2107
2108 switch(type->type_class) {
2109 case LTT_INT_FIXED:
2110 case LTT_UINT_FIXED:
2111 case LTT_POINTER:
2112 case LTT_CHAR:
2113 case LTT_UCHAR:
2114 case LTT_SHORT:
2115 case LTT_USHORT:
2116 case LTT_INT:
2117 case LTT_UINT:
2118 case LTT_LONG:
2119 case LTT_ULONG:
2120 case LTT_SIZE_T:
2121 case LTT_SSIZE_T:
2122 case LTT_OFF_T:
2123 case LTT_FLOAT:
2124 case LTT_ENUM:
2125 /* Align offset on type size */
2126 return field->field_size;
2127 break;
2128 case LTT_STRING:
2129 return 0;
2130 break;
2131 case LTT_ARRAY:
2132 g_assert(type->fields->len == 1);
2133 {
2134 LttField *child = &g_array_index(type->fields, LttField, 0);
2135 return get_alignment(child);
2136 }
2137 break;
2138 case LTT_SEQUENCE:
2139 g_assert(type->fields->len == 2);
2140 {
2141 off_t localign = 0;
2142 LttField *child = &g_array_index(type->fields, LttField, 0);
2143
2144 localign = max(localign, get_alignment(child));
2145
2146 child = &g_array_index(type->fields, LttField, 1);
2147 localign = max(localign, get_alignment(child));
2148
2149 return localign;
2150 }
2151 break;
2152 case LTT_STRUCT:
2153 case LTT_UNION:
2154 {
2155 guint i;
2156 off_t localign = 0;
2157
2158 for(i=0; i<type->fields->len; i++) {
2159 LttField *child = &g_array_index(type->fields, LttField, i);
2160 localign = max(localign, get_alignment(child));
2161 }
2162 return localign;
2163 }
2164 break;
2165 case LTT_NONE:
2166 default:
2167 g_error("get_alignment : unknown type");
2168 }
2169
2170 }
2171
2172 /*****************************************************************************
2173 *Function name
2174 * field_compute_static_size : Determine the size of fields known by their
2175 * sole definition. Unions, arrays and struct sizes might be known, but
2176 * the parser does not give that information.
2177 *Input params
2178 * tf : tracefile
2179 * field : field
2180 *
2181 ****************************************************************************/
2182
2183 void field_compute_static_size(LttFacility *fac, LttField *field)
2184 {
2185 LttType *type = &field->field_type;
2186
2187 switch(type->type_class) {
2188 case LTT_INT_FIXED:
2189 case LTT_UINT_FIXED:
2190 case LTT_POINTER:
2191 case LTT_CHAR:
2192 case LTT_UCHAR:
2193 case LTT_SHORT:
2194 case LTT_USHORT:
2195 case LTT_INT:
2196 case LTT_UINT:
2197 case LTT_LONG:
2198 case LTT_ULONG:
2199 case LTT_SIZE_T:
2200 case LTT_SSIZE_T:
2201 case LTT_OFF_T:
2202 case LTT_FLOAT:
2203 case LTT_ENUM:
2204 case LTT_STRING:
2205 /* nothing to do */
2206 break;
2207 case LTT_ARRAY:
2208 /* note this : array type size is the number of elements in the array,
2209 * while array field size of the length of the array in bytes */
2210 g_assert(type->fields->len == 1);
2211 {
2212 LttField *child = &g_array_index(type->fields, LttField, 0);
2213 field_compute_static_size(fac, child);
2214
2215 if(child->field_size != 0) {
2216 field->field_size = type->size * child->field_size;
2217 field->dynamic_offsets = g_array_sized_new(FALSE, TRUE,
2218 sizeof(off_t), type->size);
2219 } else {
2220 field->field_size = 0;
2221 }
2222 }
2223 break;
2224 case LTT_SEQUENCE:
2225 g_assert(type->fields->len == 2);
2226 {
2227 off_t local_offset = 0;
2228 LttField *child = &g_array_index(type->fields, LttField, 1);
2229 field_compute_static_size(fac, child);
2230 field->field_size = 0;
2231 type->size = 0;
2232 if(child->field_size != 0) {
2233 field->dynamic_offsets = g_array_sized_new(FALSE, TRUE,
2234 sizeof(off_t), SEQUENCE_AVG_ELEMENTS);
2235 }
2236 }
2237 break;
2238 case LTT_STRUCT:
2239 case LTT_UNION:
2240 {
2241 guint i;
2242 for(i=0;i<type->fields->len;i++) {
2243 LttField *child = &g_array_index(type->fields, LttField, i);
2244 field_compute_static_size(fac, child);
2245 if(child->field_size != 0) {
2246 type->size += ltt_align(type->size, get_alignment(child),
2247 fac->alignment);
2248 type->size += child->field_size;
2249 } else {
2250 /* As soon as we find a child with variable size, we have
2251 * a variable size */
2252 type->size = 0;
2253 break;
2254 }
2255 }
2256 field->field_size = type->size;
2257 }
2258 break;
2259 default:
2260 g_error("field_static_size : unknown type");
2261 }
2262
2263 }
2264
2265
2266
2267 /*****************************************************************************
2268 *Function name
2269 * precompute_fields_offsets : set the precomputable offset of the fields
2270 *Input params
2271 * fac : facility
2272 * field : the field
2273 * offset : pointer to the current offset, must be incremented
2274 *
2275 * return : 1 : found a variable length field, stop the processing.
2276 * 0 otherwise.
2277 ****************************************************************************/
2278
2279
2280 gint precompute_fields_offsets(LttFacility *fac, LttField *field, off_t *offset)
2281 {
2282 LttType *type = &field->field_type;
2283
2284 switch(type->type_class) {
2285 case LTT_INT_FIXED:
2286 case LTT_UINT_FIXED:
2287 case LTT_POINTER:
2288 case LTT_CHAR:
2289 case LTT_UCHAR:
2290 case LTT_SHORT:
2291 case LTT_USHORT:
2292 case LTT_INT:
2293 case LTT_UINT:
2294 case LTT_LONG:
2295 case LTT_ULONG:
2296 case LTT_SIZE_T:
2297 case LTT_SSIZE_T:
2298 case LTT_OFF_T:
2299 case LTT_FLOAT:
2300 case LTT_ENUM:
2301 g_assert(field->field_size != 0);
2302 /* Align offset on type size */
2303 *offset += ltt_align(*offset, get_alignment(field),
2304 fac->alignment);
2305 /* remember offset */
2306 field->offset_root = *offset;
2307 field->fixed_root = FIELD_FIXED;
2308 /* Increment offset */
2309 *offset += field->field_size;
2310 return 0;
2311 break;
2312 case LTT_STRING:
2313 field->offset_root = *offset;
2314 field->fixed_root = FIELD_FIXED;
2315 return 1;
2316 break;
2317 case LTT_ARRAY:
2318 g_assert(type->fields->len == 1);
2319 {
2320 LttField *child = &g_array_index(type->fields, LttField, 0);
2321
2322 *offset += ltt_align(*offset, get_alignment(field),
2323 fac->alignment);
2324
2325 /* remember offset */
2326 field->offset_root = *offset;
2327 field->array_offset = *offset;
2328 field->fixed_root = FIELD_FIXED;
2329
2330 /* Let the child be variable */
2331 //precompute_fields_offsets(tf, child, offset);
2332
2333 if(field->field_size != 0) {
2334 /* Increment offset */
2335 /* field_size is the array size in bytes */
2336 *offset += field->field_size;
2337 return 0;
2338 } else {
2339 return 1;
2340 }
2341 }
2342 break;
2343 case LTT_SEQUENCE:
2344 g_assert(type->fields->len == 2);
2345 {
2346 LttField *child;
2347 guint ret;
2348
2349 *offset += ltt_align(*offset, get_alignment(field),
2350 fac->alignment);
2351
2352 /* remember offset */
2353 field->offset_root = *offset;
2354 field->fixed_root = FIELD_FIXED;
2355
2356 child = &g_array_index(type->fields, LttField, 0);
2357 ret = precompute_fields_offsets(fac, child, offset);
2358 g_assert(ret == 0); /* Seq len cannot have variable len */
2359
2360 child = &g_array_index(type->fields, LttField, 1);
2361 *offset += ltt_align(*offset, get_alignment(child),
2362 fac->alignment);
2363 field->array_offset = *offset;
2364 /* Let the child be variable. */
2365 //ret = precompute_fields_offsets(fac, child, offset);
2366
2367 /* Cannot precompute fields offsets of sequence members, and has
2368 * variable length. */
2369 return 1;
2370 }
2371 break;
2372 case LTT_STRUCT:
2373 {
2374 LttField *child;
2375 guint i;
2376 gint ret=0;
2377
2378 *offset += ltt_align(*offset, get_alignment(field),
2379 fac->alignment);
2380 /* remember offset */
2381 field->offset_root = *offset;
2382 field->fixed_root = FIELD_FIXED;
2383
2384 for(i=0; i< type->fields->len; i++) {
2385 child = &g_array_index(type->fields, LttField, i);
2386 ret = precompute_fields_offsets(fac, child, offset);
2387
2388 if(ret) break;
2389 }
2390 return ret;
2391 }
2392 break;
2393 case LTT_UNION:
2394 {
2395 LttField *child;
2396 guint i;
2397 gint ret=0;
2398
2399 *offset += ltt_align(*offset, get_alignment(field),
2400 fac->alignment);
2401 /* remember offset */
2402 field->offset_root = *offset;
2403 field->fixed_root = FIELD_FIXED;
2404
2405 for(i=0; i< type->fields->len; i++) {
2406 *offset = field->offset_root;
2407 child = &g_array_index(type->fields, LttField, i);
2408 ret = precompute_fields_offsets(fac, child, offset);
2409
2410 if(ret) break;
2411 }
2412 *offset = field->offset_root + field->field_size;
2413 return ret;
2414 }
2415
2416 break;
2417 case LTT_NONE:
2418 default:
2419 g_error("precompute_fields_offsets : unknown type");
2420 return 1;
2421 }
2422
2423 }
2424
2425
2426 /*****************************************************************************
2427 *Function name
2428 * precompute_offsets : set the precomputable offset of an event type
2429 *Input params
2430 * tf : tracefile
2431 * event : event type
2432 *
2433 ****************************************************************************/
2434 void precompute_offsets(LttFacility *fac, LttEventType *event)
2435 {
2436 guint i;
2437 off_t offset = 0;
2438 gint ret;
2439
2440 /* First, compute the size of fixed size fields. Will determine size for
2441 * arrays, struct and unions, which is not done by the parser */
2442 for(i=0; i<event->fields->len; i++) {
2443 LttField *field = &g_array_index(event->fields, LttField, i);
2444 field_compute_static_size(fac, field);
2445 }
2446
2447 /* Precompute all known offsets */
2448 for(i=0; i<event->fields->len; i++) {
2449 LttField *field = &g_array_index(event->fields, LttField, i);
2450 ret = precompute_fields_offsets(fac, field, &offset);
2451 if(ret) break;
2452 }
2453 }
2454
2455
2456
2457
2458 /*****************************************************************************
2459 *Function name
2460 * preset_field_type_size : set the fixed sizes of the field type
2461 *Input params
2462 * tf : tracefile
2463 * event_type : event type
2464 * offset_root : offset from the root
2465 * offset_parent : offset from the parent
2466 * fixed_root : Do we know a fixed offset to the root ?
2467 * fixed_parent : Do we know a fixed offset to the parent ?
2468 * field : field
2469 ****************************************************************************/
2470
2471
2472
2473 // preset the fixed size offsets. Calculate them just like genevent-new : an
2474 // increment of a *to value that represents the offset from the start of the
2475 // event data.
2476 // The preset information is : offsets up to (and including) the first element
2477 // of variable size. All subsequent fields must be flagged "VARIABLE OFFSET".
2478 #if 0
2479 void preset_field_type_size(LttTracefile *tf, LttEventType *event_type,
2480 off_t offset_root, off_t offset_parent,
2481 enum field_status *fixed_root, enum field_status *fixed_parent,
2482 LttField *field)
2483 {
2484 enum field_status local_fixed_root, local_fixed_parent;
2485 guint i;
2486 LttType *type;
2487
2488 g_assert(field->fixed_root == FIELD_UNKNOWN);
2489 g_assert(field->fixed_parent == FIELD_UNKNOWN);
2490 g_assert(field->fixed_size == FIELD_UNKNOWN);
2491
2492 type = field->field_type;
2493
2494 field->fixed_root = *fixed_root;
2495 if(field->fixed_root == FIELD_FIXED)
2496 field->offset_root = offset_root;
2497 else
2498 field->offset_root = 0;
2499
2500 field->fixed_parent = *fixed_parent;
2501 if(field->fixed_parent == FIELD_FIXED)
2502 field->offset_parent = offset_parent;
2503 else
2504 field->offset_parent = 0;
2505
2506 size_t current_root_offset;
2507 size_t current_offset;
2508 enum field_status current_child_status, final_child_status;
2509 size_t max_size;
2510
2511 switch(type->type_class) {
2512 case LTT_INT:
2513 case LTT_UINT:
2514 case LTT_FLOAT:
2515 case LTT_ENUM:
2516 field->field_size = ltt_type_size(tf->trace, type);
2517 field->fixed_size = FIELD_FIXED;
2518 break;
2519 case LTT_POINTER:
2520 field->field_size = (off_t)event_type->facility->pointer_size;
2521 field->fixed_size = FIELD_FIXED;
2522 break;
2523 case LTT_LONG:
2524 case LTT_ULONG:
2525 field->field_size = (off_t)event_type->facility->long_size;
2526 field->fixed_size = FIELD_FIXED;
2527 break;
2528 case LTT_SIZE_T:
2529 case LTT_SSIZE_T:
2530 case LTT_OFF_T:
2531 field->field_size = (off_t)event_type->facility->size_t_size;
2532 field->fixed_size = FIELD_FIXED;
2533 break;
2534 case LTT_SEQUENCE:
2535 local_fixed_root = FIELD_VARIABLE;
2536 local_fixed_parent = FIELD_VARIABLE;
2537 preset_field_type_size(tf, event_type,
2538 0, 0,
2539 &local_fixed_root, &local_fixed_parent,
2540 field->child[0]);
2541 field->fixed_size = FIELD_VARIABLE;
2542 field->field_size = 0;
2543 *fixed_root = FIELD_VARIABLE;
2544 *fixed_parent = FIELD_VARIABLE;
2545 break;
2546 case LTT_STRING:
2547 field->fixed_size = FIELD_VARIABLE;
2548 field->field_size = 0;
2549 *fixed_root = FIELD_VARIABLE;
2550 *fixed_parent = FIELD_VARIABLE;
2551 break;
2552 case LTT_ARRAY:
2553 local_fixed_root = FIELD_VARIABLE;
2554 local_fixed_parent = FIELD_VARIABLE;
2555 preset_field_type_size(tf, event_type,
2556 0, 0,
2557 &local_fixed_root, &local_fixed_parent,
2558 field->child[0]);
2559 field->fixed_size = field->child[0]->fixed_size;
2560 if(field->fixed_size == FIELD_FIXED) {
2561 field->field_size = type->element_number * field->child[0]->field_size;
2562 } else {
2563 field->field_size = 0;
2564 *fixed_root = FIELD_VARIABLE;
2565 *fixed_parent = FIELD_VARIABLE;
2566 }
2567 break;
2568 case LTT_STRUCT:
2569 current_root_offset = field->offset_root;
2570 current_offset = 0;
2571 current_child_status = FIELD_FIXED;
2572 for(i=0;i<type->element_number;i++) {
2573 preset_field_type_size(tf, event_type,
2574 current_root_offset, current_offset,
2575 fixed_root, &current_child_status,
2576 field->child[i]);
2577 if(current_child_status == FIELD_FIXED) {
2578 current_root_offset += field->child[i]->field_size;
2579 current_offset += field->child[i]->field_size;
2580 } else {
2581 current_root_offset = 0;
2582 current_offset = 0;
2583 }
2584 }
2585 if(current_child_status != FIELD_FIXED) {
2586 *fixed_parent = current_child_status;
2587 field->field_size = 0;
2588 field->fixed_size = current_child_status;
2589 } else {
2590 field->field_size = current_offset;
2591 field->fixed_size = FIELD_FIXED;
2592 }
2593 break;
2594 case LTT_UNION:
2595 current_root_offset = field->offset_root;
2596 current_offset = 0;
2597 max_size = 0;
2598 final_child_status = FIELD_FIXED;
2599 for(i=0;i<type->element_number;i++) {
2600 enum field_status current_root_child_status = FIELD_FIXED;
2601 enum field_status current_child_status = FIELD_FIXED;
2602 preset_field_type_size(tf, event_type,
2603 current_root_offset, current_offset,
2604 &current_root_child_status, &current_child_status,
2605 field->child[i]);
2606 if(current_child_status != FIELD_FIXED)
2607 final_child_status = current_child_status;
2608 else
2609 max_size = max(max_size, field->child[i]->field_size);
2610 }
2611 if(final_child_status != FIELD_FIXED) {
2612 g_error("LTTV does not support variable size fields in unions.");
2613 /* This will stop the application. */
2614 *fixed_root = final_child_status;
2615 *fixed_parent = final_child_status;
2616 field->field_size = 0;
2617 field->fixed_size = current_child_status;
2618 } else {
2619 field->field_size = max_size;
2620 field->fixed_size = FIELD_FIXED;
2621 }
2622 break;
2623 }
2624
2625 }
2626 #endif //0
2627
2628 /*****************************************************************************
2629 *Function name
2630 * check_fields_compatibility : Check for compatibility between two fields :
2631 * do they use the same inner structure ?
2632 *Input params
2633 * event_type1 : event type
2634 * event_type2 : event type
2635 * field1 : field
2636 * field2 : field
2637 *Returns : 0 if identical
2638 * 1 if not.
2639 ****************************************************************************/
2640 // this function checks for equality of field types. Therefore, it does not use
2641 // per se offsets. For instance, an aligned version of a structure is
2642 // compatible with an unaligned version of the same structure.
2643 gint check_fields_compatibility(LttEventType *event_type1,
2644 LttEventType *event_type2,
2645 LttField *field1, LttField *field2)
2646 {
2647 guint different = 0;
2648 LttType *type1;
2649 LttType *type2;
2650
2651 if(field1 == NULL) {
2652 if(field2 == NULL) goto end;
2653 else {
2654 different = 1;
2655 goto end;
2656 }
2657 } else if(field2 == NULL) {
2658 different = 1;
2659 goto end;
2660 }
2661
2662 type1 = &field1->field_type;
2663 type2 = &field2->field_type;
2664
2665 if(type1->type_class != type2->type_class) {
2666 different = 1;
2667 goto end;
2668 }
2669
2670 switch(type1->type_class) {
2671 case LTT_INT_FIXED:
2672 case LTT_UINT_FIXED:
2673 case LTT_POINTER:
2674 case LTT_CHAR:
2675 case LTT_UCHAR:
2676 case LTT_SHORT:
2677 case LTT_USHORT:
2678 case LTT_INT:
2679 case LTT_UINT:
2680 case LTT_LONG:
2681 case LTT_ULONG:
2682 case LTT_SIZE_T:
2683 case LTT_SSIZE_T:
2684 case LTT_OFF_T:
2685 case LTT_FLOAT:
2686 case LTT_ENUM:
2687 if(field1->field_size != field2->field_size)
2688 different = 1;
2689 break;
2690 case LTT_STRING:
2691 break;
2692 case LTT_ARRAY:
2693 {
2694 LttField *child1 = &g_array_index(type1->fields, LttField, 0);
2695 LttField *child2 = &g_array_index(type2->fields, LttField, 0);
2696
2697 if(type1->size != type2->size)
2698 different = 1;
2699 if(check_fields_compatibility(event_type1, event_type2, child1, child2))
2700 different = 1;
2701 }
2702 break;
2703 case LTT_SEQUENCE:
2704 {
2705 LttField *child1 = &g_array_index(type1->fields, LttField, 1);
2706 LttField *child2 = &g_array_index(type2->fields, LttField, 1);
2707
2708 if(check_fields_compatibility(event_type1, event_type2, child1, child2))
2709 different = 1;
2710 }
2711 break;
2712 case LTT_STRUCT:
2713 case LTT_UNION:
2714 {
2715 LttField *child;
2716 guint i;
2717
2718 if(type1->fields->len != type2->fields->len) {
2719 different = 1;
2720 goto end;
2721 }
2722
2723 for(i=0; i< type1->fields->len; i++) {
2724 LttField *child1;
2725 LttField *child2;
2726 child1 = &g_array_index(type1->fields, LttField, i);
2727 child2 = &g_array_index(type2->fields, LttField, i);
2728 different = check_fields_compatibility(event_type1,
2729 event_type2, child1, child2);
2730
2731 if(different) break;
2732 }
2733 }
2734 break;
2735 case LTT_NONE:
2736 default:
2737 g_error("precompute_fields_offsets : unknown type");
2738 }
2739
2740 end:
2741 return different;
2742 }
2743
2744
2745 #if 0
2746 gint check_fields_compatibility(LttEventType *event_type1,
2747 LttEventType *event_type2,
2748 LttField *field1, LttField *field2)
2749 {
2750 guint different = 0;
2751 guint i;
2752 LttType *type1;
2753 LttType *type2;
2754
2755 if(field1 == NULL) {
2756 if(field2 == NULL) goto end;
2757 else {
2758 different = 1;
2759 goto end;
2760 }
2761 } else if(field2 == NULL) {
2762 different = 1;
2763 goto end;
2764 }
2765
2766 g_assert(field1->fixed_root != FIELD_UNKNOWN);
2767 g_assert(field2->fixed_root != FIELD_UNKNOWN);
2768 g_assert(field1->fixed_parent != FIELD_UNKNOWN);
2769 g_assert(field2->fixed_parent != FIELD_UNKNOWN);
2770 g_assert(field1->fixed_size != FIELD_UNKNOWN);
2771 g_assert(field2->fixed_size != FIELD_UNKNOWN);
2772
2773 type1 = field1->field_type;
2774 type2 = field2->field_type;
2775
2776 if(type1->type_class != type2->type_class) {
2777 different = 1;
2778 goto end;
2779 }
2780 if(type1->element_name != type2->element_name) {
2781 different = 1;
2782 goto end;
2783 }
2784
2785 switch(type1->type_class) {
2786 case LTT_INT:
2787 case LTT_UINT:
2788 case LTT_FLOAT:
2789 case LTT_POINTER:
2790 case LTT_LONG:
2791 case LTT_ULONG:
2792 case LTT_SIZE_T:
2793 case LTT_SSIZE_T:
2794 case LTT_OFF_T:
2795 if(field1->field_size != field2->field_size) {
2796 different = 1;
2797 goto end;
2798 }
2799 break;
2800 case LTT_ENUM:
2801 if(type1->element_number != type2->element_number) {
2802 different = 1;
2803 goto end;
2804 }
2805 for(i=0;i<type1->element_number;i++) {
2806 if(type1->enum_strings[i] != type2->enum_strings[i]) {
2807 different = 1;
2808 goto end;
2809 }
2810 }
2811 break;
2812 case LTT_SEQUENCE:
2813 /* Two elements : size and child */
2814 g_assert(type1->element_number != type2->element_number);
2815 for(i=0;i<type1->element_number;i++) {
2816 if(check_fields_compatibility(event_type1, event_type2,
2817 field1->child[0], field2->child[0])) {
2818 different = 1;
2819 goto end;
2820 }
2821 }
2822 break;
2823 case LTT_STRING:
2824 break;
2825 case LTT_ARRAY:
2826 if(field1->field_size != field2->field_size) {
2827 different = 1;
2828 goto end;
2829 }
2830 /* Two elements : size and child */
2831 g_assert(type1->element_number != type2->element_number);
2832 for(i=0;i<type1->element_number;i++) {
2833 if(check_fields_compatibility(event_type1, event_type2,
2834 field1->child[0], field2->child[0])) {
2835 different = 1;
2836 goto end;
2837 }
2838 }
2839 break;
2840 case LTT_STRUCT:
2841 case LTT_UNION:
2842 if(type1->element_number != type2->element_number) {
2843 different = 1;
2844 break;
2845 }
2846 for(i=0;i<type1->element_number;i++) {
2847 if(check_fields_compatibility(event_type1, event_type2,
2848 field1->child[0], field2->child[0])) {
2849 different = 1;
2850 goto end;
2851 }
2852 }
2853 break;
2854 }
2855 end:
2856 return different;
2857 }
2858 #endif //0
2859
2860
2861 /*****************************************************************************
2862 *Function name
2863 * ltt_get_int : get an integer number
2864 *Input params
2865 * reverse_byte_order: must we reverse the byte order ?
2866 * size : the size of the integer
2867 * ptr : the data pointer
2868 *Return value
2869 * gint64 : a 64 bits integer
2870 ****************************************************************************/
2871
2872 gint64 ltt_get_int(gboolean reverse_byte_order, gint size, void *data)
2873 {
2874 gint64 val;
2875
2876 switch(size) {
2877 case 1: val = *((gint8*)data); break;
2878 case 2: val = ltt_get_int16(reverse_byte_order, data); break;
2879 case 4: val = ltt_get_int32(reverse_byte_order, data); break;
2880 case 8: val = ltt_get_int64(reverse_byte_order, data); break;
2881 default: val = ltt_get_int64(reverse_byte_order, data);
2882 g_critical("get_int : integer size %d unknown", size);
2883 break;
2884 }
2885
2886 return val;
2887 }
2888
2889 /*****************************************************************************
2890 *Function name
2891 * ltt_get_uint : get an unsigned integer number
2892 *Input params
2893 * reverse_byte_order: must we reverse the byte order ?
2894 * size : the size of the integer
2895 * ptr : the data pointer
2896 *Return value
2897 * guint64 : a 64 bits unsigned integer
2898 ****************************************************************************/
2899
2900 guint64 ltt_get_uint(gboolean reverse_byte_order, gint size, void *data)
2901 {
2902 guint64 val;
2903
2904 switch(size) {
2905 case 1: val = *((gint8*)data); break;
2906 case 2: val = ltt_get_uint16(reverse_byte_order, data); break;
2907 case 4: val = ltt_get_uint32(reverse_byte_order, data); break;
2908 case 8: val = ltt_get_uint64(reverse_byte_order, data); break;
2909 default: val = ltt_get_uint64(reverse_byte_order, data);
2910 g_critical("get_uint : unsigned integer size %d unknown",
2911 size);
2912 break;
2913 }
2914
2915 return val;
2916 }
2917
2918
2919 /* get the node name of the system */
2920
2921 char * ltt_trace_system_description_node_name (LttSystemDescription * s)
2922 {
2923 return s->node_name;
2924 }
2925
2926
2927 /* get the domain name of the system */
2928
2929 char * ltt_trace_system_description_domain_name (LttSystemDescription * s)
2930 {
2931 return s->domain_name;
2932 }
2933
2934
2935 /* get the description of the system */
2936
2937 char * ltt_trace_system_description_description (LttSystemDescription * s)
2938 {
2939 return s->description;
2940 }
2941
2942
2943 /* get the NTP corrected start time of the trace */
2944 LttTime ltt_trace_start_time(LttTrace *t)
2945 {
2946 return t->start_time;
2947 }
2948
2949 /* get the monotonic start time of the trace */
2950 LttTime ltt_trace_start_time_monotonic(LttTrace *t)
2951 {
2952 return t->start_time_from_tsc;
2953 }
2954
2955 LttTracefile *ltt_tracefile_new()
2956 {
2957 return g_new(LttTracefile, 1);
2958 }
2959
2960 void ltt_tracefile_destroy(LttTracefile *tf)
2961 {
2962 g_free(tf);
2963 }
2964
2965 void ltt_tracefile_copy(LttTracefile *dest, const LttTracefile *src)
2966 {
2967 *dest = *src;
2968 }
2969
2970 /* Before library loading... */
2971
2972 static void __attribute__((constructor)) init(void)
2973 {
2974 LTT_FACILITY_NAME_HEARTBEAT = g_quark_from_string("heartbeat");
2975 LTT_EVENT_NAME_HEARTBEAT = g_quark_from_string("heartbeat");
2976
2977 LTT_TRACEFILE_NAME_FACILITIES = g_quark_from_string("/control/facilities");
2978 }
2979
LTTng 2.x Viewer (LTTV)
This page took 0.128162 seconds and 5 git commands to generate.