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liblttvtraceread: make static some functions that should be static
[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 #include <string.h>
38
39 // For realpath
40 #include <limits.h>
41 #include <stdlib.h>
42
43
44 #include <ltt/ltt.h>
45 #include "ltt-private.h"
46 #include <ltt/trace.h>
47 #include <ltt/event.h>
48 #include <ltt/ltt-types.h>
49 #include <ltt/marker.h>
50
51 /* Facility names used in this file */
52
53 GQuark LTT_FACILITY_NAME_HEARTBEAT,
54 LTT_EVENT_NAME_HEARTBEAT,
55 LTT_EVENT_NAME_HEARTBEAT_FULL;
56 GQuark LTT_TRACEFILE_NAME_FACILITIES;
57
58 #ifndef g_open
59 #define g_open open
60 #endif
61
62
63 #define __UNUSED__ __attribute__((__unused__))
64
65 #define g_info(format...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_INFO, format)
66
67 #ifndef g_debug
68 #define g_debug(format...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, format)
69 #endif
70
71 #define g_close close
72
73 /* Those macros must be called from within a function where page_size is a known
74 * variable */
75 #define PAGE_MASK (~(page_size-1))
76 #define PAGE_ALIGN(addr) (((addr)+page_size-1)&PAGE_MASK)
77
78 LttTrace *father_trace = NULL;
79
80 /* set the offset of the fields belonging to the event,
81 need the information of the archecture */
82 //void set_fields_offsets(LttTracefile *tf, LttEventType *event_type);
83 //size_t get_fields_offsets(LttTracefile *tf, LttEventType *event_type, void *data);
84
85 /* get the size of the field type according to
86 * The facility size information. */
87 #if 0
88 static inline void preset_field_type_size(LttTracefile *tf,
89 LttEventType *event_type,
90 off_t offset_root, off_t offset_parent,
91 enum field_status *fixed_root, enum field_status *fixed_parent,
92 LttField *field);
93 #endif //0
94
95 /* map a fixed size or a block information from the file (fd) */
96 static gint map_block(LttTracefile * tf, guint block_num);
97
98 /* calculate nsec per cycles for current block */
99 #if 0
100 static guint32 calc_nsecs_per_cycle(LttTracefile * t);
101 static guint64 cycles_2_ns(LttTracefile *tf, guint64 cycles);
102 #endif //0
103
104 /* go to the next event */
105 static int ltt_seek_next_event(LttTracefile *tf);
106
107 static int open_tracefiles(LttTrace *trace, gchar *root_path,
108 gchar *relative_path);
109 static int ltt_process_facility_tracefile(LttTracefile *tf);
110 static void ltt_tracefile_time_span_get(LttTracefile *tf,
111 LttTime *start, LttTime *end);
112 static void group_time_span_get(GQuark name, gpointer data, gpointer user_data);
113 static gint map_block(LttTracefile * tf, guint block_num);
114 static void ltt_update_event_size(LttTracefile *tf);
115
116 /* Enable event debugging */
117 static int a_event_debug = 0;
118
119 void ltt_event_debug(int state)
120 {
121 a_event_debug = state;
122 }
123
124 /* trace can be NULL
125 *
126 * Return value : 0 success, 1 bad tracefile
127 */
128 static int parse_trace_header(void *header, LttTracefile *tf, LttTrace *t)
129 {
130 guint32 *magic_number = (guint32*)header;
131 struct ltt_trace_header_any *any = (struct ltt_trace_header_any *)header;
132
133 if(*magic_number == LTT_MAGIC_NUMBER)
134 tf->reverse_bo = 0;
135 else if(*magic_number == LTT_REV_MAGIC_NUMBER)
136 tf->reverse_bo = 1;
137 else /* invalid magic number, bad tracefile ! */
138 return 1;
139
140 /* Get float byte order : might be different from int byte order
141 * (or is set to 0 if the trace has no float (kernel trace)) */
142 tf->float_word_order = any->float_word_order;
143 tf->alignment = any->alignment;
144 tf->has_heartbeat = any->has_heartbeat;
145
146 if(t) {
147 t->arch_type = ltt_get_uint32(LTT_GET_BO(tf),
148 &any->arch_type);
149 t->arch_variant = ltt_get_uint32(LTT_GET_BO(tf),
150 &any->arch_variant);
151 t->arch_size = any->arch_size;
152 t->ltt_major_version = any->major_version;
153 t->ltt_minor_version = any->minor_version;
154 t->flight_recorder = any->flight_recorder;
155 // t->compact_facilities = NULL;
156 }
157
158 switch(any->major_version) {
159
160 case 0:
161 g_warning("Unsupported trace version : %hhu.%hhu",
162 any->major_version, any->minor_version);
163 return 1;
164 break;
165 case 1:
166 switch(any->minor_version) {
167 case 0:
168 {
169 struct ltt_trace_header_1_0 *vheader =
170 (struct ltt_trace_header_1_0 *)header;
171 tf->buffer_header_size =
172 sizeof(struct ltt_block_start_header)
173 + sizeof(struct ltt_trace_header_1_0);
174 tf->tsc_lsb_truncate = vheader->tsc_lsb_truncate;
175 tf->tscbits = vheader->tscbits;
176 tf->tsc_msb_cutoff = 32 - tf->tsc_lsb_truncate - tf->tscbits;
177 tf->compact_event_bits = 32 - vheader->compact_data_shift;
178 tf->tsc_mask = ((1ULL << (tf->tscbits))-1);
179 tf->tsc_mask = tf->tsc_mask << tf->tsc_lsb_truncate;
180 tf->tsc_mask_next_bit = (1ULL<<(tf->tscbits));
181 tf->tsc_mask_next_bit = tf->tsc_mask_next_bit << tf->tsc_lsb_truncate;
182 if(t) {
183 t->start_freq = ltt_get_uint64(LTT_GET_BO(tf),
184 &vheader->start_freq);
185 t->freq_scale = ltt_get_uint32(LTT_GET_BO(tf),
186 &vheader->freq_scale);
187 if(father_trace) {
188 t->start_freq = father_trace->start_freq;
189 t->freq_scale = father_trace->freq_scale;
190 }
191 else {
192 father_trace = t;
193 }
194 t->start_tsc = ltt_get_uint64(LTT_GET_BO(tf),
195 &vheader->start_tsc);
196 t->start_monotonic = ltt_get_uint64(LTT_GET_BO(tf),
197 &vheader->start_monotonic);
198 t->start_time.tv_sec = ltt_get_uint64(LTT_GET_BO(tf),
199 &vheader->start_time_sec);
200 t->start_time.tv_nsec = ltt_get_uint64(LTT_GET_BO(tf),
201 &vheader->start_time_usec);
202 t->start_time.tv_nsec *= 1000; /* microsec to nanosec */
203
204 t->start_time_from_tsc = ltt_time_from_uint64(
205 (double)t->start_tsc
206 * (1000000000.0 / tf->trace->freq_scale)
207 / (double)t->start_freq);
208 }
209 }
210 break;
211 default:
212 g_warning("Unsupported trace version : %hhu.%hhu",
213 any->major_version, any->minor_version);
214 return 1;
215 }
216 break;
217 default:
218 g_warning("Unsupported trace version : %hhu.%hhu",
219 any->major_version, any->minor_version);
220 return 1;
221 }
222
223
224 return 0;
225 }
226
227
228
229 /*****************************************************************************
230 *Function name
231 * ltt_tracefile_open : open a trace file, construct a LttTracefile
232 *Input params
233 * t : the trace containing the tracefile
234 * fileName : path name of the trace file
235 * tf : the tracefile structure
236 *Return value
237 * : 0 for success, -1 otherwise.
238 ****************************************************************************/
239
240 static gint ltt_tracefile_open(LttTrace *t, gchar * fileName, LttTracefile *tf)
241 {
242 struct stat lTDFStat; /* Trace data file status */
243 struct ltt_block_start_header *header;
244 int page_size = getpagesize();
245
246 //open the file
247 tf->long_name = g_quark_from_string(fileName);
248 tf->trace = t;
249 tf->fd = open(fileName, O_RDONLY);
250 if(tf->fd < 0){
251 g_warning("Unable to open input data file %s\n", fileName);
252 goto end;
253 }
254
255 // Get the file's status
256 if(fstat(tf->fd, &lTDFStat) < 0){
257 g_warning("Unable to get the status of the input data file %s\n", fileName);
258 goto close_file;
259 }
260
261 // Is the file large enough to contain a trace
262 if(lTDFStat.st_size <
263 (off_t)(sizeof(struct ltt_block_start_header)
264 + sizeof(struct ltt_trace_header_any))){
265 g_print("The input data file %s does not contain a trace\n", fileName);
266 goto close_file;
267 }
268
269 /* Temporarily map the buffer start header to get trace information */
270 /* Multiple of pages aligned head */
271 tf->buffer.head = mmap(0,
272 PAGE_ALIGN(sizeof(struct ltt_block_start_header)
273 + sizeof(struct ltt_trace_header_any)), PROT_READ,
274 MAP_PRIVATE, tf->fd, 0);
275 if(tf->buffer.head == MAP_FAILED) {
276 perror("Error in allocating memory for buffer of tracefile");
277 goto close_file;
278 }
279 g_assert( ( (gulong)tf->buffer.head&(8-1) ) == 0); // make sure it's aligned.
280
281 header = (struct ltt_block_start_header*)tf->buffer.head;
282
283 if(parse_trace_header(header->trace, tf, NULL)) {
284 g_warning("parse_trace_header error");
285 goto unmap_file;
286 }
287
288 //store the size of the file
289 tf->file_size = lTDFStat.st_size;
290 tf->buf_size = ltt_get_uint32(LTT_GET_BO(tf), &header->buf_size);
291 tf->num_blocks = tf->file_size / tf->buf_size;
292
293 if(munmap(tf->buffer.head,
294 PAGE_ALIGN(sizeof(struct ltt_block_start_header)
295 + sizeof(struct ltt_trace_header_any)))) {
296 g_warning("unmap size : %u\n",
297 PAGE_ALIGN(sizeof(struct ltt_block_start_header)
298 + sizeof(struct ltt_trace_header_any)));
299 perror("munmap error");
300 g_assert(0);
301 }
302 tf->buffer.head = NULL;
303
304 //read the first block
305 if(map_block(tf,0)) {
306 perror("Cannot map block for tracefile");
307 goto close_file;
308 }
309
310 return 0;
311
312 /* Error */
313 unmap_file:
314 if(munmap(tf->buffer.head,
315 PAGE_ALIGN(sizeof(struct ltt_block_start_header)
316 + sizeof(struct ltt_trace_header_any)))) {
317 g_warning("unmap size : %u\n",
318 PAGE_ALIGN(sizeof(struct ltt_block_start_header)
319 + sizeof(struct ltt_trace_header_any)));
320 perror("munmap error");
321 g_assert(0);
322 }
323 close_file:
324 close(tf->fd);
325 end:
326 return -1;
327 }
328
329 #if 0
330 /*****************************************************************************
331 *Open control and per cpu tracefiles
332 ****************************************************************************/
333
334 void ltt_tracefile_open_cpu(LttTrace *t, gchar * tracefile_name)
335 {
336 LttTracefile * tf;
337 tf = ltt_tracefile_open(t,tracefile_name);
338 if(!tf) return;
339 t->per_cpu_tracefile_number++;
340 g_ptr_array_add(t->per_cpu_tracefiles, tf);
341 }
342
343 gint ltt_tracefile_open_control(LttTrace *t, gchar * control_name)
344 {
345 LttTracefile * tf;
346 LttEvent ev;
347 LttFacility * f;
348 void * pos;
349 FacilityLoad fLoad;
350 unsigned int i;
351
352 tf = ltt_tracefile_open(t,control_name);
353 if(!tf) {
354 g_warning("ltt_tracefile_open_control : bad file descriptor");
355 return -1;
356 }
357 t->control_tracefile_number++;
358 g_ptr_array_add(t->control_tracefiles,tf);
359
360 //parse facilities tracefile to get base_id
361 if(strcmp(&control_name[strlen(control_name)-10],"facilities") ==0){
362 while(1){
363 if(!ltt_tracefile_read(tf,&ev)) return 0; // end of file
364
365 if(ev.event_id == TRACE_FACILITY_LOAD){
366 pos = ev.data;
367 fLoad.name = (gchar*)pos;
368 fLoad.checksum = *(LttChecksum*)(pos + strlen(fLoad.name));
369 fLoad.base_code = *(guint32 *)(pos + strlen(fLoad.name) + sizeof(LttChecksum));
370
371 for(i=0;i<t->facility_number;i++){
372 f = (LttFacility*)g_ptr_array_index(t->facilities,i);
373 if(strcmp(f->name,fLoad.name)==0 && fLoad.checksum==f->checksum){
374 f->base_id = fLoad.base_code;
375 break;
376 }
377 }
378 if(i==t->facility_number) {
379 g_warning("Facility: %s, checksum: %u is not found",
380 fLoad.name,(unsigned int)fLoad.checksum);
381 return -1;
382 }
383 }else if(ev.event_id == TRACE_BLOCK_START){
384 continue;
385 }else if(ev.event_id == TRACE_BLOCK_END){
386 break;
387 }else {
388 g_warning("Not valid facilities trace file");
389 return -1;
390 }
391 }
392 }
393 return 0;
394 }
395 #endif //0
396
397 /*****************************************************************************
398 *Function name
399 * ltt_tracefile_close: close a trace file,
400 *Input params
401 * t : tracefile which will be closed
402 ****************************************************************************/
403
404 static void ltt_tracefile_close(LttTracefile *t)
405 {
406 int page_size = getpagesize();
407
408 if(t->buffer.head != NULL)
409 if(munmap(t->buffer.head, PAGE_ALIGN(t->buf_size))) {
410 g_warning("unmap size : %u\n",
411 PAGE_ALIGN(t->buf_size));
412 perror("munmap error");
413 g_assert(0);
414 }
415
416 close(t->fd);
417 }
418
419
420 /*****************************************************************************
421 *Get system information
422 ****************************************************************************/
423 #if 0
424 gint getSystemInfo(LttSystemDescription* des, gchar * pathname)
425 {
426 int fd;
427 GIOChannel *iochan;
428 gchar *buf = NULL;
429 gsize length;
430
431 GMarkupParseContext * context;
432 GError * error = NULL;
433 GMarkupParser markup_parser =
434 {
435 parser_start_element,
436 NULL,
437 parser_characters,
438 NULL, /* passthrough */
439 NULL /* error */
440 };
441
442 fd = g_open(pathname, O_RDONLY, 0);
443 if(fd == -1){
444 g_warning("Can not open file : %s\n", pathname);
445 return -1;
446 }
447
448 iochan = g_io_channel_unix_new(fd);
449
450 context = g_markup_parse_context_new(&markup_parser, 0, des,NULL);
451
452 //while(fgets(buf,DIR_NAME_SIZE, fp) != NULL){
453 while(g_io_channel_read_line(iochan, &buf, &length, NULL, &error)
454 != G_IO_STATUS_EOF) {
455
456 if(error != NULL) {
457 g_warning("Can not read xml file: \n%s\n", error->message);
458 g_error_free(error);
459 }
460 if(!g_markup_parse_context_parse(context, buf, length, &error)){
461 if(error != NULL) {
462 g_warning("Can not parse xml file: \n%s\n", error->message);
463 g_error_free(error);
464 }
465 g_markup_parse_context_free(context);
466
467 g_io_channel_shutdown(iochan, FALSE, &error); /* No flush */
468 if(error != NULL) {
469 g_warning("Can not close file: \n%s\n", error->message);
470 g_error_free(error);
471 }
472
473 close(fd);
474 return -1;
475 }
476 }
477 g_markup_parse_context_free(context);
478
479 g_io_channel_shutdown(iochan, FALSE, &error); /* No flush */
480 if(error != NULL) {
481 g_warning("Can not close file: \n%s\n", error->message);
482 g_error_free(error);
483 }
484
485 g_close(fd);
486
487 g_free(buf);
488 return 0;
489 }
490 #endif //0
491
492 /*****************************************************************************
493 *The following functions get facility/tracefile information
494 ****************************************************************************/
495 #if 0
496 gint getFacilityInfo(LttTrace *t, gchar* eventdefs)
497 {
498 GDir * dir;
499 const gchar * name;
500 unsigned int i,j;
501 LttFacility * f;
502 LttEventType * et;
503 gchar fullname[DIR_NAME_SIZE];
504 GError * error = NULL;
505
506 dir = g_dir_open(eventdefs, 0, &error);
507
508 if(error != NULL) {
509 g_warning("Can not open directory: %s, %s\n", eventdefs, error->message);
510 g_error_free(error);
511 return -1;
512 }
513
514 while((name = g_dir_read_name(dir)) != NULL){
515 if(!g_pattern_match_simple("*.xml", name)) continue;
516 strcpy(fullname,eventdefs);
517 strcat(fullname,name);
518 ltt_facility_open(t,fullname);
519 }
520 g_dir_close(dir);
521
522 for(j=0;j<t->facility_number;j++){
523 f = (LttFacility*)g_ptr_array_index(t->facilities, j);
524 for(i=0; i<f->event_number; i++){
525 et = f->events[i];
526 setFieldsOffset(NULL, et, NULL, t);
527 }
528 }
529 return 0;
530 }
531 #endif //0
532
533 /*****************************************************************************
534 *A trace is specified as a pathname to the directory containing all the
535 *associated data (control tracefiles, per cpu tracefiles, event
536 *descriptions...).
537 *
538 *When a trace is closed, all the associated facilities, types and fields
539 *are released as well.
540 */
541
542
543 /****************************************************************************
544 * get_absolute_pathname
545 *
546 * return the unique pathname in the system
547 *
548 * MD : Fixed this function so it uses realpath, dealing well with
549 * forgotten cases (.. were not used correctly before).
550 *
551 ****************************************************************************/
552 void get_absolute_pathname(const gchar *pathname, gchar * abs_pathname)
553 {
554 abs_pathname[0] = '\0';
555
556 if ( realpath (pathname, abs_pathname) != NULL)
557 return;
558 else
559 {
560 /* error, return the original path unmodified */
561 strcpy(abs_pathname, pathname);
562 return;
563 }
564 return;
565 }
566
567 /* Search for something like : .*_.*
568 *
569 * The left side is the name, the right side is the number.
570 */
571
572 static int get_tracefile_name_number(gchar *raw_name,
573 GQuark *name,
574 guint *num,
575 gulong *tid,
576 gulong *pgid,
577 guint64 *creation)
578 {
579 guint raw_name_len = strlen(raw_name);
580 gchar char_name[PATH_MAX];
581 int i;
582 int underscore_pos;
583 long int cpu_num;
584 gchar *endptr;
585 gchar *tmpptr;
586
587 for(i=raw_name_len-1;i>=0;i--) {
588 if(raw_name[i] == '_') break;
589 }
590 if(i==-1) { /* Either not found or name length is 0 */
591 /* This is a userspace tracefile */
592 strncpy(char_name, raw_name, raw_name_len);
593 char_name[raw_name_len] = '\0';
594 *name = g_quark_from_string(char_name);
595 *num = 0; /* unknown cpu */
596 for(i=0;i<raw_name_len;i++) {
597 if(raw_name[i] == '/') {
598 break;
599 }
600 }
601 i++;
602 for(;i<raw_name_len;i++) {
603 if(raw_name[i] == '/') {
604 break;
605 }
606 }
607 i++;
608 for(;i<raw_name_len;i++) {
609 if(raw_name[i] == '-') {
610 break;
611 }
612 }
613 if(i == raw_name_len) return -1;
614 i++;
615 tmpptr = &raw_name[i];
616 for(;i<raw_name_len;i++) {
617 if(raw_name[i] == '.') {
618 raw_name[i] = ' ';
619 break;
620 }
621 }
622 *tid = strtoul(tmpptr, &endptr, 10);
623 if(endptr == tmpptr)
624 return -1; /* No digit */
625 if(*tid == ULONG_MAX)
626 return -1; /* underflow / overflow */
627 i++;
628 tmpptr = &raw_name[i];
629 for(;i<raw_name_len;i++) {
630 if(raw_name[i] == '.') {
631 raw_name[i] = ' ';
632 break;
633 }
634 }
635 *pgid = strtoul(tmpptr, &endptr, 10);
636 if(endptr == tmpptr)
637 return -1; /* No digit */
638 if(*pgid == ULONG_MAX)
639 return -1; /* underflow / overflow */
640 i++;
641 tmpptr = &raw_name[i];
642 *creation = strtoull(tmpptr, &endptr, 10);
643 if(endptr == tmpptr)
644 return -1; /* No digit */
645 if(*creation == G_MAXUINT64)
646 return -1; /* underflow / overflow */
647 } else {
648 underscore_pos = i;
649
650 cpu_num = strtol(raw_name+underscore_pos+1, &endptr, 10);
651
652 if(endptr == raw_name+underscore_pos+1)
653 return -1; /* No digit */
654 if(cpu_num == LONG_MIN || cpu_num == LONG_MAX)
655 return -1; /* underflow / overflow */
656
657 strncpy(char_name, raw_name, underscore_pos);
658 char_name[underscore_pos] = '\0';
659
660 *name = g_quark_from_string(char_name);
661 *num = cpu_num;
662 }
663
664
665 return 0;
666 }
667
668
669 GData **ltt_trace_get_tracefiles_groups(LttTrace *trace)
670 {
671 return &trace->tracefiles;
672 }
673
674
675 void compute_tracefile_group(GQuark key_id,
676 GArray *group,
677 struct compute_tracefile_group_args *args)
678 {
679 int i;
680 LttTracefile *tf;
681
682 for(i=0; i<group->len; i++) {
683 tf = &g_array_index (group, LttTracefile, i);
684 if(tf->cpu_online)
685 args->func(tf, args->func_args);
686 }
687 }
688
689
690 static void ltt_tracefile_group_destroy(gpointer data)
691 {
692 GArray *group = (GArray *)data;
693 int i;
694 LttTracefile *tf;
695
696 for(i=0; i<group->len; i++) {
697 tf = &g_array_index (group, LttTracefile, i);
698 if(tf->cpu_online)
699 ltt_tracefile_close(tf);
700 }
701 g_array_free(group, TRUE);
702 }
703
704 static gboolean ltt_tracefile_group_has_cpu_online(gpointer data)
705 {
706 GArray *group = (GArray *)data;
707 int i;
708 LttTracefile *tf;
709
710 for(i=0; i<group->len; i++) {
711 tf = &g_array_index (group, LttTracefile, i);
712 if(tf->cpu_online)
713 return 1;
714 }
715 return 0;
716 }
717
718
719 /* Open each tracefile under a specific directory. Put them in a
720 * GData : permits to access them using their tracefile group pathname.
721 * i.e. access control/modules tracefile group by index :
722 * "control/module".
723 *
724 * relative path is the path relative to the trace root
725 * root path is the full path
726 *
727 * A tracefile group is simply an array where all the per cpu tracefiles sit.
728 */
729
730 static int open_tracefiles(LttTrace *trace, gchar *root_path, gchar *relative_path)
731 {
732 DIR *dir = opendir(root_path);
733 struct dirent *entry;
734 struct stat stat_buf;
735 int ret;
736
737 gchar path[PATH_MAX];
738 int path_len;
739 gchar *path_ptr;
740
741 int rel_path_len;
742 gchar rel_path[PATH_MAX];
743 gchar *rel_path_ptr;
744 LttTracefile tmp_tf;
745
746 if(dir == NULL) {
747 perror(root_path);
748 return ENOENT;
749 }
750
751 strncpy(path, root_path, PATH_MAX-1);
752 path_len = strlen(path);
753 path[path_len] = '/';
754 path_len++;
755 path_ptr = path + path_len;
756
757 strncpy(rel_path, relative_path, PATH_MAX-1);
758 rel_path_len = strlen(rel_path);
759 rel_path[rel_path_len] = '/';
760 rel_path_len++;
761 rel_path_ptr = rel_path + rel_path_len;
762
763 while((entry = readdir(dir)) != NULL) {
764
765 if(entry->d_name[0] == '.') continue;
766
767 strncpy(path_ptr, entry->d_name, PATH_MAX - path_len);
768 strncpy(rel_path_ptr, entry->d_name, PATH_MAX - rel_path_len);
769
770 ret = stat(path, &stat_buf);
771 if(ret == -1) {
772 perror(path);
773 continue;
774 }
775
776 g_debug("Tracefile file or directory : %s\n", path);
777
778 // if(strcmp(rel_path, "/eventdefs") == 0) continue;
779
780 if(S_ISDIR(stat_buf.st_mode)) {
781
782 g_debug("Entering subdirectory...\n");
783 ret = open_tracefiles(trace, path, rel_path);
784 if(ret < 0) continue;
785 } else if(S_ISREG(stat_buf.st_mode)) {
786 GQuark name;
787 guint num;
788 gulong tid, pgid;
789 guint64 creation;
790 GArray *group;
791 num = 0;
792 tid = pgid = 0;
793 creation = 0;
794 if(get_tracefile_name_number(rel_path, &name, &num, &tid, &pgid, &creation))
795 continue; /* invalid name */
796
797 g_debug("Opening file.\n");
798 if(ltt_tracefile_open(trace, path, &tmp_tf)) {
799 g_info("Error opening tracefile %s", path);
800
801 continue; /* error opening the tracefile : bad magic number ? */
802 }
803
804 g_debug("Tracefile name is %s and number is %u",
805 g_quark_to_string(name), num);
806
807 tmp_tf.cpu_online = 1;
808 tmp_tf.cpu_num = num;
809 tmp_tf.name = name;
810 tmp_tf.tid = tid;
811 tmp_tf.pgid = pgid;
812 tmp_tf.creation = creation;
813 if(tmp_tf.name == g_quark_from_string("/compact")
814 || tmp_tf.name == g_quark_from_string("/flight-compact"))
815 tmp_tf.compact = 1;
816 else
817 tmp_tf.compact = 0;
818 group = g_datalist_id_get_data(&trace->tracefiles, name);
819 if(group == NULL) {
820 /* Elements are automatically cleared when the array is allocated.
821 * It makes the cpu_online variable set to 0 : cpu offline, by default.
822 */
823 group = g_array_sized_new (FALSE, TRUE, sizeof(LttTracefile), 10);
824 g_datalist_id_set_data_full(&trace->tracefiles, name,
825 group, ltt_tracefile_group_destroy);
826 }
827
828 /* Add the per cpu tracefile to the named group */
829 unsigned int old_len = group->len;
830 if(num+1 > old_len)
831 group = g_array_set_size(group, num+1);
832 g_array_index (group, LttTracefile, num) = tmp_tf;
833 g_array_index (group, LttTracefile, num).event.tracefile =
834 &g_array_index (group, LttTracefile, num);
835 }
836 }
837
838 closedir(dir);
839
840 return 0;
841 }
842
843
844 /* Presumes the tracefile is already seeked at the beginning. It makes sense,
845 * because it must be done just after the opening */
846 static int ltt_process_facility_tracefile(LttTracefile *tf)
847 {
848 int err;
849 //LttFacility *fac;
850 //GArray *fac_ids;
851 guint i;
852 //LttEventType *et;
853
854 while(1) {
855 err = ltt_tracefile_read_seek(tf);
856 if(err == EPERM) goto seek_error;
857 else if(err == ERANGE) break; /* End of tracefile */
858
859 err = ltt_tracefile_read_update_event(tf);
860 if(err) goto update_error;
861
862 /* We are on a facility load/or facility unload/ or heartbeat event */
863 /* The rules are :
864 * * facility 0 is hardcoded : this is the core facility. It will be shown
865 * in the facility array though, and is shown as "loaded builtin" in the
866 * trace.
867 * It contains event :
868 * 0 : facility load
869 * 1 : facility unload
870 * 2 : state dump facility load
871 * 3 : heartbeat
872 */
873 if(tf->event.event_id >= MARKER_CORE_IDS) {
874 /* Should only contain core facility */
875 g_warning("Error in processing facility file %s, "
876 "should not contain event id %u.", g_quark_to_string(tf->name),
877 tf->event.event_id);
878 err = EPERM;
879 goto event_id_error;
880 } else {
881
882 char *pos;
883 const char *marker_name, *format;
884 uint16_t id;
885 guint8 int_size, long_size, pointer_size, size_t_size, alignment;
886
887 // FIXME align
888 switch((enum marker_id)tf->event.event_id) {
889 case MARKER_ID_SET_MARKER_ID:
890 marker_name = pos = tf->event.data;
891 g_debug("Doing MARKER_ID_SET_MARKER_ID of marker %s", marker_name);
892 pos += strlen(marker_name) + 1;
893 //remove genevent compatibility
894 //pos += ltt_align((size_t)pos, tf->trace->arch_size, tf->alignment);
895 pos += ltt_align((size_t)pos, sizeof(uint16_t), tf->alignment);
896 id = ltt_get_uint16(LTT_GET_BO(tf), pos);
897 g_debug("In MARKER_ID_SET_MARKER_ID of marker %s id %hu",
898 marker_name, id);
899 pos += sizeof(guint16);
900 int_size = *(guint8*)pos;
901 pos += sizeof(guint8);
902 long_size = *(guint8*)pos;
903 pos += sizeof(guint8);
904 pointer_size = *(guint8*)pos;
905 pos += sizeof(guint8);
906 size_t_size = *(guint8*)pos;
907 pos += sizeof(guint8);
908 alignment = *(guint8*)pos;
909 pos += sizeof(guint8);
910 marker_id_event(tf->trace, g_quark_from_string(marker_name),
911 id, int_size, long_size,
912 pointer_size, size_t_size, alignment);
913 break;
914 case MARKER_ID_SET_MARKER_FORMAT:
915 marker_name = pos = tf->event.data;
916 g_debug("Doing MARKER_ID_SET_MARKER_FORMAT of marker %s",
917 marker_name);
918 pos += strlen(marker_name) + 1;
919 //break genevent.
920 //pos += ltt_align((size_t)pos, tf->trace->arch_size, tf->alignment);
921 format = pos;
922 pos += strlen(format) + 1;
923 //break genevent
924 //pos += ltt_align((size_t)pos, tf->trace->arch_size, tf->alignment);
925 marker_format_event(tf->trace, g_quark_from_string(marker_name),
926 format);
927 /* get information from dictionnary TODO */
928 break;
929 case MARKER_ID_HEARTBEAT_32:
930 case MARKER_ID_HEARTBEAT_64:
931 break;
932 default:
933 g_warning("Error in processing facility file %s, "
934 "unknown event id %hhu.",
935 g_quark_to_string(tf->name),
936 tf->event.event_id);
937 err = EPERM;
938 goto event_id_error;
939 }
940 }
941 }
942 return 0;
943
944 /* Error handling */
945 event_id_error:
946 update_error:
947 seek_error:
948 g_warning("An error occured in facility tracefile parsing");
949 return err;
950 }
951
952
953 LttTrace *ltt_trace_open(const gchar *pathname)
954 {
955 gchar abs_path[PATH_MAX];
956 LttTrace * t;
957 LttTracefile *tf;
958 GArray *group;
959 int i, ret;
960 struct ltt_block_start_header *header;
961 DIR *dir;
962 struct dirent *entry;
963 guint control_found = 0;
964 struct stat stat_buf;
965 gchar path[PATH_MAX];
966
967 t = g_new(LttTrace, 1);
968 if(!t) goto alloc_error;
969
970 get_absolute_pathname(pathname, abs_path);
971 t->pathname = g_quark_from_string(abs_path);
972
973 g_datalist_init(&t->tracefiles);
974
975 /* Test to see if it looks like a trace */
976 dir = opendir(abs_path);
977 if(dir == NULL) {
978 perror(abs_path);
979 goto open_error;
980 }
981 while((entry = readdir(dir)) != NULL) {
982 strcpy(path, abs_path);
983 strcat(path, "/");
984 strcat(path, entry->d_name);
985 ret = stat(path, &stat_buf);
986 if(ret == -1) {
987 perror(path);
988 continue;
989 }
990 if(S_ISDIR(stat_buf.st_mode)) {
991 if(strcmp(entry->d_name, "control") == 0) {
992 control_found = 1;
993 }
994 }
995 }
996 closedir(dir);
997
998 if(!control_found) goto find_error;
999
1000 /* Open all the tracefiles */
1001 if(open_tracefiles(t, abs_path, "")) {
1002 g_warning("Error opening tracefile %s", abs_path);
1003 goto find_error;
1004 }
1005
1006 /* Parse each trace control/facilitiesN files : get runtime fac. info */
1007 group = g_datalist_id_get_data(&t->tracefiles, LTT_TRACEFILE_NAME_FACILITIES);
1008 if(group == NULL) {
1009 g_error("Trace %s has no facility tracefile", abs_path);
1010 g_assert(0);
1011 goto facilities_error;
1012 }
1013
1014 /* Get the trace information for the control/facility 0 tracefile */
1015 g_assert(group->len > 0);
1016 tf = &g_array_index (group, LttTracefile, 0);
1017 header = (struct ltt_block_start_header*)tf->buffer.head;
1018 g_assert(parse_trace_header(header->trace,
1019 tf, t) == 0);
1020
1021 t->num_cpu = group->len;
1022
1023 ret = allocate_marker_data(t);
1024 if (ret)
1025 g_error("Error in allocating marker data");
1026
1027 for(i=0; i<group->len; i++) {
1028 tf = &g_array_index (group, LttTracefile, i);
1029 if(ltt_process_facility_tracefile(tf))
1030 goto facilities_error;
1031 }
1032
1033 return t;
1034
1035 /* Error handling */
1036 facilities_error:
1037 destroy_marker_data(t);
1038 find_error:
1039 g_datalist_clear(&t->tracefiles);
1040 open_error:
1041 g_free(t);
1042 alloc_error:
1043 return NULL;
1044
1045 }
1046
1047 /******************************************************************************
1048 * When we copy a trace, we want all the opening actions to happen again :
1049 * the trace will be reopened and totally independant from the original.
1050 * That's why we call ltt_trace_open.
1051 *****************************************************************************/
1052 LttTrace *ltt_trace_copy(LttTrace *self)
1053 {
1054 return ltt_trace_open(g_quark_to_string(self->pathname));
1055 }
1056
1057 void ltt_trace_close(LttTrace *t)
1058 {
1059 g_datalist_clear(&t->tracefiles);
1060 g_free(t);
1061 }
1062
1063
1064 /*****************************************************************************
1065 * Get the start time and end time of the trace
1066 ****************************************************************************/
1067
1068 void ltt_tracefile_time_span_get(LttTracefile *tf,
1069 LttTime *start, LttTime *end)
1070 {
1071 int err;
1072
1073 err = map_block(tf, 0);
1074 if(unlikely(err)) {
1075 g_error("Can not map block");
1076 *start = ltt_time_infinite;
1077 } else
1078 *start = tf->buffer.begin.timestamp;
1079
1080 err = map_block(tf, tf->num_blocks - 1); /* Last block */
1081 if(unlikely(err)) {
1082 g_error("Can not map block");
1083 *end = ltt_time_zero;
1084 } else
1085 *end = tf->buffer.end.timestamp;
1086 }
1087
1088 struct tracefile_time_span_get_args {
1089 LttTrace *t;
1090 LttTime *start;
1091 LttTime *end;
1092 };
1093
1094 static void group_time_span_get(GQuark name, gpointer data, gpointer user_data)
1095 {
1096 struct tracefile_time_span_get_args *args =
1097 (struct tracefile_time_span_get_args*)user_data;
1098
1099 GArray *group = (GArray *)data;
1100 int i;
1101 LttTracefile *tf;
1102 LttTime tmp_start;
1103 LttTime tmp_end;
1104
1105 for(i=0; i<group->len; i++) {
1106 tf = &g_array_index (group, LttTracefile, i);
1107 if(tf->cpu_online) {
1108 ltt_tracefile_time_span_get(tf, &tmp_start, &tmp_end);
1109 if(ltt_time_compare(*args->start, tmp_start)>0) *args->start = tmp_start;
1110 if(ltt_time_compare(*args->end, tmp_end)<0) *args->end = tmp_end;
1111 }
1112 }
1113 }
1114
1115 /* return the start and end time of a trace */
1116
1117 void ltt_trace_time_span_get(LttTrace *t, LttTime *start, LttTime *end)
1118 {
1119 LttTime min_start = ltt_time_infinite;
1120 LttTime max_end = ltt_time_zero;
1121 struct tracefile_time_span_get_args args = { t, &min_start, &max_end };
1122
1123 g_datalist_foreach(&t->tracefiles, &group_time_span_get, &args);
1124
1125 if(start != NULL) *start = min_start;
1126 if(end != NULL) *end = max_end;
1127
1128 }
1129
1130
1131 /* Seek to the first event in a tracefile that has a time equal or greater than
1132 * the time passed in parameter.
1133 *
1134 * If the time parameter is outside the tracefile time span, seek to the first
1135 * event or if after, return ERANGE.
1136 *
1137 * If the time parameter is before the first event, we have to seek specially to
1138 * there.
1139 *
1140 * If the time is after the end of the trace, return ERANGE.
1141 *
1142 * Do a binary search to find the right block, then a sequential search in the
1143 * block to find the event.
1144 *
1145 * In the special case where the time requested fits inside a block that has no
1146 * event corresponding to the requested time, the first event of the next block
1147 * will be seeked.
1148 *
1149 * IMPORTANT NOTE : // FIXME everywhere...
1150 *
1151 * You MUST NOT do a ltt_tracefile_read right after a ltt_tracefile_seek_time :
1152 * you will jump over an event if you do.
1153 *
1154 * Return value : 0 : no error, the tf->event can be used
1155 * ERANGE : time if after the last event of the trace
1156 * otherwise : this is an error.
1157 *
1158 * */
1159
1160 int ltt_tracefile_seek_time(LttTracefile *tf, LttTime time)
1161 {
1162 int ret = 0;
1163 int err;
1164 unsigned int block_num, high, low;
1165
1166 /* seek at the beginning of trace */
1167 err = map_block(tf, 0); /* First block */
1168 if(unlikely(err)) {
1169 g_error("Can not map block");
1170 goto fail;
1171 }
1172
1173 /* If the time is lower or equal the beginning of the trace,
1174 * go to the first event. */
1175 if(ltt_time_compare(time, tf->buffer.begin.timestamp) <= 0) {
1176 ret = ltt_tracefile_read(tf);
1177 if(ret == ERANGE) goto range;
1178 else if (ret) goto fail;
1179 goto found; /* There is either no event in the trace or the event points
1180 to the first event in the trace */
1181 }
1182
1183 err = map_block(tf, tf->num_blocks - 1); /* Last block */
1184 if(unlikely(err)) {
1185 g_error("Can not map block");
1186 goto fail;
1187 }
1188
1189 /* If the time is after the end of the trace, return ERANGE. */
1190 if(ltt_time_compare(time, tf->buffer.end.timestamp) > 0) {
1191 goto range;
1192 }
1193
1194 /* Binary search the block */
1195 high = tf->num_blocks - 1;
1196 low = 0;
1197
1198 while(1) {
1199 block_num = ((high-low) / 2) + low;
1200
1201 err = map_block(tf, block_num);
1202 if(unlikely(err)) {
1203 g_error("Can not map block");
1204 goto fail;
1205 }
1206 if(high == low) {
1207 /* We cannot divide anymore : this is what would happen if the time
1208 * requested was exactly between two consecutive buffers'end and start
1209 * timestamps. This is also what would happend if we didn't deal with out
1210 * of span cases prior in this function. */
1211 /* The event is right in the buffer!
1212 * (or in the next buffer first event) */
1213 while(1) {
1214 ret = ltt_tracefile_read(tf);
1215 if(ret == ERANGE) goto range; /* ERANGE or EPERM */
1216 else if(ret) goto fail;
1217
1218 if(ltt_time_compare(time, tf->event.event_time) <= 0)
1219 goto found;
1220 }
1221
1222 } else if(ltt_time_compare(time, tf->buffer.begin.timestamp) < 0) {
1223 /* go to lower part */
1224 high = block_num - 1;
1225 } else if(ltt_time_compare(time, tf->buffer.end.timestamp) > 0) {
1226 /* go to higher part */
1227 low = block_num + 1;
1228 } else {/* The event is right in the buffer!
1229 (or in the next buffer first event) */
1230 while(1) {
1231 ret = ltt_tracefile_read(tf);
1232 if(ret == ERANGE) goto range; /* ERANGE or EPERM */
1233 else if(ret) goto fail;
1234
1235 if(ltt_time_compare(time, tf->event.event_time) <= 0)
1236 break;
1237 }
1238 goto found;
1239 }
1240 }
1241
1242 found:
1243 return 0;
1244 range:
1245 return ERANGE;
1246
1247 /* Error handling */
1248 fail:
1249 g_error("ltt_tracefile_seek_time failed on tracefile %s",
1250 g_quark_to_string(tf->name));
1251 return EPERM;
1252 }
1253
1254
1255 int ltt_tracefile_seek_position(LttTracefile *tf, const LttEventPosition *ep)
1256 {
1257 int err;
1258
1259 if(ep->tracefile != tf) {
1260 goto fail;
1261 }
1262
1263 err = map_block(tf, ep->block);
1264 if(unlikely(err)) {
1265 g_error("Can not map block");
1266 goto fail;
1267 }
1268
1269 tf->event.offset = ep->offset;
1270
1271 /* Put back the event real tsc */
1272 tf->event.tsc = ep->tsc;
1273 tf->buffer.tsc = ep->tsc;
1274
1275 err = ltt_tracefile_read_update_event(tf);
1276 if(err) goto fail;
1277 err = ltt_tracefile_read_op(tf);
1278 if(err) goto fail;
1279
1280 return 0;
1281
1282 fail:
1283 g_error("ltt_tracefile_seek_time failed on tracefile %s",
1284 g_quark_to_string(tf->name));
1285 return 1;
1286 }
1287
1288 LttTime ltt_interpolate_time_from_tsc(LttTracefile *tf, guint64 tsc)
1289 {
1290 LttTime time;
1291
1292 if(tsc > tf->trace->start_tsc) {
1293 time = ltt_time_from_uint64(
1294 (double)(tsc - tf->trace->start_tsc)
1295 * (1000000000.0 / tf->trace->freq_scale)
1296 / (double)tf->trace->start_freq);
1297 time = ltt_time_add(tf->trace->start_time_from_tsc, time);
1298 } else {
1299 time = ltt_time_from_uint64(
1300 (double)(tf->trace->start_tsc - tsc)
1301 * (1000000000.0 / tf->trace->freq_scale)
1302 / (double)tf->trace->start_freq);
1303 time = ltt_time_sub(tf->trace->start_time_from_tsc, time);
1304 }
1305 return time;
1306 }
1307
1308 /* Calculate the real event time based on the buffer boundaries */
1309 LttTime ltt_interpolate_time(LttTracefile *tf, LttEvent *event)
1310 {
1311 return ltt_interpolate_time_from_tsc(tf, tf->buffer.tsc);
1312 }
1313
1314
1315 /* Get the current event of the tracefile : valid until the next read */
1316 LttEvent *ltt_tracefile_get_event(LttTracefile *tf)
1317 {
1318 return &tf->event;
1319 }
1320
1321
1322
1323 /*****************************************************************************
1324 *Function name
1325 * ltt_tracefile_read : Read the next event in the tracefile
1326 *Input params
1327 * t : tracefile
1328 *Return value
1329 *
1330 * Returns 0 if an event can be used in tf->event.
1331 * Returns ERANGE on end of trace. The event in tf->event still can be used
1332 * (if the last block was not empty).
1333 * Returns EPERM on error.
1334 *
1335 * This function does make the tracefile event structure point to the event
1336 * currently pointed to by the tf->event.
1337 *
1338 * Note : you must call a ltt_tracefile_seek to the beginning of the trace to
1339 * reinitialize it after an error if you want results to be coherent.
1340 * It would be the case if a end of trace last buffer has no event : the end
1341 * of trace wouldn't be returned, but an error.
1342 * We make the assumption there is at least one event per buffer.
1343 ****************************************************************************/
1344
1345 int ltt_tracefile_read(LttTracefile *tf)
1346 {
1347 int err;
1348
1349 err = ltt_tracefile_read_seek(tf);
1350 if(err) return err;
1351 err = ltt_tracefile_read_update_event(tf);
1352 if(err) return err;
1353 err = ltt_tracefile_read_op(tf);
1354 if(err) return err;
1355
1356 return 0;
1357 }
1358
1359 int ltt_tracefile_read_seek(LttTracefile *tf)
1360 {
1361 int err;
1362
1363 /* Get next buffer until we finally have an event, or end of trace */
1364 while(1) {
1365 err = ltt_seek_next_event(tf);
1366 if(unlikely(err == ENOPROTOOPT)) {
1367 return EPERM;
1368 }
1369
1370 /* Are we at the end of the buffer ? */
1371 if(err == ERANGE) {
1372 if(unlikely(tf->buffer.index == tf->num_blocks-1)){ /* end of trace ? */
1373 return ERANGE;
1374 } else {
1375 /* get next block */
1376 err = map_block(tf, tf->buffer.index + 1);
1377 if(unlikely(err)) {
1378 g_error("Can not map block");
1379 return EPERM;
1380 }
1381 }
1382 } else break; /* We found an event ! */
1383 }
1384
1385 return 0;
1386 }
1387
1388
1389 /* do specific operation on events */
1390 int ltt_tracefile_read_op(LttTracefile *tf)
1391 {
1392 LttEvent *event;
1393
1394 event = &tf->event;
1395
1396 /* do event specific operation */
1397
1398 /* do something if its an heartbeat event : increment the heartbeat count */
1399 //if(event->facility_id == LTT_FACILITY_CORE)
1400 // if(event->event_id == LTT_EVENT_HEARTBEAT)
1401 // tf->cur_heart_beat_number++;
1402
1403 return 0;
1404 }
1405
1406 static void print_debug_event_header(LttEvent *ev, void *start_pos, void *end_pos)
1407 {
1408 unsigned int offset = 0;
1409 int i, j;
1410
1411 g_printf("Event header (tracefile %s offset %llx):\n",
1412 g_quark_to_string(ev->tracefile->long_name),
1413 ((uint64_t)ev->tracefile->buffer.index * ev->tracefile->buf_size)
1414 + (long)start_pos - (long)ev->tracefile->buffer.head);
1415
1416 while (offset < (long)end_pos - (long)start_pos) {
1417 g_printf("%8lx", (long)start_pos - (long)ev->tracefile->buffer.head + offset);
1418 g_printf(" ");
1419
1420 for (i = 0; i < 4 ; i++) {
1421 for (j = 0; j < 4; j++) {
1422 if (offset + ((i * 4) + j) <
1423 (long)end_pos - (long)start_pos)
1424 g_printf("%02hhX",
1425 ((char*)start_pos)[offset + ((i * 4) + j)]);
1426 else
1427 g_printf(" ");
1428 g_printf(" ");
1429 }
1430 if (i < 4)
1431 g_printf(" ");
1432 }
1433 offset+=16;
1434 g_printf("\n");
1435 }
1436 }
1437
1438
1439 /* same as ltt_tracefile_read, but does not seek to the next event nor call
1440 * event specific operation. */
1441 int ltt_tracefile_read_update_event(LttTracefile *tf)
1442 {
1443 void * pos;
1444 LttEvent *event;
1445 void *pos_aligned;
1446
1447 event = &tf->event;
1448 pos = tf->buffer.head + event->offset;
1449
1450 /* Read event header */
1451
1452 /* Align the head */
1453 if(!tf->compact)
1454 pos += ltt_align((size_t)pos, tf->trace->arch_size, tf->alignment);
1455 else {
1456 g_assert(tf->has_heartbeat);
1457 pos += ltt_align((size_t)pos, sizeof(uint32_t), tf->alignment);
1458 }
1459 pos_aligned = pos;
1460
1461 if(tf->has_heartbeat) {
1462 event->timestamp = ltt_get_uint32(LTT_GET_BO(tf),
1463 pos);
1464 if(!tf->compact) {
1465 /* 32 bits -> 64 bits tsc */
1466 /* note : still works for seek and non seek cases. */
1467 if(event->timestamp < (0xFFFFFFFFULL&tf->buffer.tsc)) {
1468 tf->buffer.tsc = ((tf->buffer.tsc&0xFFFFFFFF00000000ULL)
1469 + 0x100000000ULL)
1470 | (guint64)event->timestamp;
1471 event->tsc = tf->buffer.tsc;
1472 } else {
1473 /* no overflow */
1474 tf->buffer.tsc = (tf->buffer.tsc&0xFFFFFFFF00000000ULL)
1475 | (guint64)event->timestamp;
1476 event->tsc = tf->buffer.tsc;
1477 event->compact_data = 0;
1478 }
1479 } else {
1480 /* Compact header */
1481 /* We keep the LSB of the previous timestamp, to make sure
1482 * we never go back */
1483 event->event_id = event->timestamp >> tf->tscbits;
1484 event->event_id = event->event_id & ((1 << tf->compact_event_bits) - 1);
1485 event->compact_data = event->timestamp >>
1486 (tf->compact_event_bits + tf->tscbits);
1487 //printf("tsc bits %u, ev bits %u init data %u\n",
1488 // tf->tscbits, tf->trace->compact_event_bits, event->compact_data);
1489 /* Put the compact data back in original endianness */
1490 event->compact_data = ltt_get_uint32(LTT_GET_BO(tf), &event->compact_data);
1491 event->event_size = 0xFFFF;
1492 //printf("Found compact event %d\n", event->event_id);
1493 //printf("Compact data %d\n", event->compact_data);
1494 event->timestamp = event->timestamp << tf->tsc_lsb_truncate;
1495 event->timestamp = event->timestamp & tf->tsc_mask;
1496 //printf("timestamp 0x%lX\n", event->timestamp);
1497 //printf("mask 0x%llX\n", tf->tsc_mask);
1498 //printf("mask_next 0x%llX\n", tf->tsc_mask_next_bit);
1499 //printf("previous tsc 0x%llX\n", tf->buffer.tsc);
1500 //printf("previous tsc&mask 0x%llX\n", tf->tsc_mask&tf->buffer.tsc);
1501 //printf("previous tsc&(~mask) 0x%llX\n", tf->buffer.tsc&(~tf->tsc_mask));
1502 if(event->timestamp < (tf->tsc_mask&tf->buffer.tsc)) {
1503 //printf("wrap\n");
1504 tf->buffer.tsc = ((tf->buffer.tsc&(~tf->tsc_mask))
1505 + tf->tsc_mask_next_bit)
1506 | (guint64)event->timestamp;
1507 event->tsc = tf->buffer.tsc;
1508 } else {
1509 //printf("no wrap\n");
1510 /* no overflow */
1511 tf->buffer.tsc = (tf->buffer.tsc&(~tf->tsc_mask))
1512 | (guint64)event->timestamp;
1513 event->tsc = tf->buffer.tsc;
1514 }
1515 //printf("current tsc 0x%llX\n", tf->buffer.tsc);
1516 }
1517 pos += sizeof(guint32);
1518 } else {
1519 event->tsc = ltt_get_uint64(LTT_GET_BO(tf), pos);
1520 tf->buffer.tsc = event->tsc;
1521 event->compact_data = 0;
1522 pos += sizeof(guint64);
1523 }
1524 event->event_time = ltt_interpolate_time(tf, event);
1525
1526 if(!tf->compact) {
1527 event->event_id = ltt_get_uint16(LTT_GET_BO(tf), pos);
1528 pos += sizeof(guint16);
1529
1530 event->event_size = ltt_get_uint16(LTT_GET_BO(tf), pos);
1531 pos += sizeof(guint16);
1532 } else {
1533 /* Compact event */
1534 event->event_size = 0xFFFF;
1535 }
1536
1537 if (a_event_debug)
1538 print_debug_event_header(event, pos_aligned, pos);
1539
1540 /* Align the head */
1541 if(!tf->compact)
1542 pos += ltt_align((size_t)pos, tf->trace->arch_size, tf->alignment);
1543
1544 event->data = pos;
1545
1546 /* get the data size and update the event fields with the current
1547 * information. Also update the time if a heartbeat_full event is found. */
1548 ltt_update_event_size(tf);
1549
1550 return 0;
1551 }
1552
1553
1554 /****************************************************************************
1555 *Function name
1556 * map_block : map a block from the file
1557 *Input Params
1558 * lttdes : ltt trace file
1559 * whichBlock : the block which will be read
1560 *return value
1561 * 0 : success
1562 * EINVAL : lseek fail
1563 * EIO : can not read from the file
1564 ****************************************************************************/
1565
1566 static gint map_block(LttTracefile * tf, guint block_num)
1567 {
1568 int page_size = getpagesize();
1569 struct ltt_block_start_header *header;
1570
1571 g_assert(block_num < tf->num_blocks);
1572
1573 if(tf->buffer.head != NULL) {
1574 if(munmap(tf->buffer.head, PAGE_ALIGN(tf->buf_size))) {
1575 g_warning("unmap size : %u\n",
1576 PAGE_ALIGN(tf->buf_size));
1577 perror("munmap error");
1578 g_assert(0);
1579 }
1580 }
1581
1582
1583 /* Multiple of pages aligned head */
1584 tf->buffer.head = mmap(0,
1585 PAGE_ALIGN(tf->buf_size),
1586 PROT_READ, MAP_PRIVATE, tf->fd,
1587 PAGE_ALIGN((off_t)tf->buf_size * (off_t)block_num));
1588
1589 if(tf->buffer.head == MAP_FAILED) {
1590 perror("Error in allocating memory for buffer of tracefile");
1591 g_assert(0);
1592 goto map_error;
1593 }
1594 g_assert( ( (gulong)tf->buffer.head&(8-1) ) == 0); // make sure it's aligned.
1595
1596
1597 tf->buffer.index = block_num;
1598
1599 header = (struct ltt_block_start_header*)tf->buffer.head;
1600
1601 #if 0
1602 tf->buffer.begin.timestamp = ltt_time_add(
1603 ltt_time_from_uint64(
1604 ltt_get_uint64(LTT_GET_BO(tf),
1605 &header->begin.timestamp)
1606 - tf->trace->start_monotonic),
1607 tf->trace->start_time);
1608 #endif //0
1609 //g_debug("block %u begin : %lu.%lu", block_num,
1610 // tf->buffer.begin.timestamp.tv_sec, tf->buffer.begin.timestamp.tv_nsec);
1611 tf->buffer.begin.cycle_count = ltt_get_uint64(LTT_GET_BO(tf),
1612 &header->begin.cycle_count);
1613 tf->buffer.begin.freq = ltt_get_uint64(LTT_GET_BO(tf),
1614 &header->begin.freq);
1615 if(tf->buffer.begin.freq == 0)
1616 tf->buffer.begin.freq = tf->trace->start_freq;
1617
1618 tf->buffer.begin.timestamp = ltt_interpolate_time_from_tsc(tf,
1619 tf->buffer.begin.cycle_count);
1620 #if 0
1621 ltt_time_add(
1622 ltt_time_from_uint64(
1623 (double)(tf->buffer.begin.cycle_count
1624 - tf->trace->start_tsc) * 1000000.0
1625 / (double)tf->trace->start_freq),
1626 tf->trace->start_time_from_tsc);
1627 #endif //0
1628 #if 0
1629
1630 tf->buffer.end.timestamp = ltt_time_add(
1631 ltt_time_from_uint64(
1632 ltt_get_uint64(LTT_GET_BO(tf),
1633 &header->end.timestamp)
1634 - tf->trace->start_monotonic),
1635 tf->trace->start_time);
1636 #endif //0
1637 //g_debug("block %u end : %lu.%lu", block_num,
1638 // tf->buffer.end.timestamp.tv_sec, tf->buffer.end.timestamp.tv_nsec);
1639 tf->buffer.end.cycle_count = ltt_get_uint64(LTT_GET_BO(tf),
1640 &header->end.cycle_count);
1641 tf->buffer.end.freq = ltt_get_uint64(LTT_GET_BO(tf),
1642 &header->end.freq);
1643 if(tf->buffer.end.freq == 0)
1644 tf->buffer.end.freq = tf->trace->start_freq;
1645
1646 tf->buffer.lost_size = ltt_get_uint32(LTT_GET_BO(tf),
1647 &header->lost_size);
1648 tf->buffer.end.timestamp = ltt_interpolate_time_from_tsc(tf,
1649 tf->buffer.end.cycle_count);
1650 #if 0
1651 ltt_time_add(
1652 ltt_time_from_uint64(
1653 (double)(tf->buffer.end.cycle_count
1654 - tf->trace->start_tsc) * 1000000.0
1655 / (double)tf->trace->start_freq),
1656 tf->trace->start_time_from_tsc);
1657 #endif //0
1658 tf->buffer.tsc = tf->buffer.begin.cycle_count;
1659 tf->event.tsc = tf->buffer.tsc;
1660 tf->buffer.freq = tf->buffer.begin.freq;
1661
1662 /* FIXME
1663 * eventually support variable buffer size : will need a partial pre-read of
1664 * the headers to create an index when we open the trace... eventually. */
1665 g_assert(tf->buf_size == ltt_get_uint32(LTT_GET_BO(tf),
1666 &header->buf_size));
1667
1668 /* Now that the buffer is mapped, calculate the time interpolation for the
1669 * block. */
1670
1671 // tf->buffer.nsecs_per_cycle = calc_nsecs_per_cycle(tf);
1672 //tf->buffer.cyc2ns_scale = calc_nsecs_per_cycle(tf);
1673
1674 /* Make the current event point to the beginning of the buffer :
1675 * it means that the event read must get the first event. */
1676 tf->event.tracefile = tf;
1677 tf->event.block = block_num;
1678 tf->event.offset = 0;
1679
1680 return 0;
1681
1682 map_error:
1683 return -errno;
1684
1685 }
1686
1687 static void print_debug_event_data(LttEvent *ev)
1688 {
1689 unsigned int offset = 0;
1690 int i, j;
1691
1692 if (!max(ev->event_size, ev->data_size))
1693 return;
1694
1695 g_printf("Event data (tracefile %s offset %llx):\n",
1696 g_quark_to_string(ev->tracefile->long_name),
1697 ((uint64_t)ev->tracefile->buffer.index * ev->tracefile->buf_size)
1698 + (long)ev->data - (long)ev->tracefile->buffer.head);
1699
1700 while (offset < max(ev->event_size, ev->data_size)) {
1701 g_printf("%8lx", (long)ev->data + offset
1702 - (long)ev->tracefile->buffer.head);
1703 g_printf(" ");
1704
1705 for (i = 0; i < 4 ; i++) {
1706 for (j = 0; j < 4; j++) {
1707 if (offset + ((i * 4) + j) < max(ev->event_size, ev->data_size))
1708 g_printf("%02hhX", ((char*)ev->data)[offset + ((i * 4) + j)]);
1709 else
1710 g_printf(" ");
1711 g_printf(" ");
1712 }
1713 if (i < 4)
1714 g_printf(" ");
1715 }
1716
1717 g_printf(" ");
1718
1719 for (i = 0; i < 4; i++) {
1720 for (j = 0; j < 4; j++) {
1721 if (offset + ((i * 4) + j) < max(ev->event_size, ev->data_size)) {
1722 if (isprint(((char*)ev->data)[offset + ((i * 4) + j)]))
1723 g_printf("%c", ((char*)ev->data)[offset + ((i * 4) + j)]);
1724 else
1725 g_printf(".");
1726 } else
1727 g_printf(" ");
1728 }
1729 }
1730 offset+=16;
1731 g_printf("\n");
1732 }
1733 }
1734
1735 /* It will update the fields offsets too */
1736 void ltt_update_event_size(LttTracefile *tf)
1737 {
1738 off_t size = 0;
1739 char *tscdata;
1740 struct marker_info *info;
1741
1742 switch((enum marker_id)tf->event.event_id) {
1743 case MARKER_ID_SET_MARKER_ID:
1744 size = strlen((char*)tf->event.data) + 1;
1745 g_debug("marker %s id set", (char*)tf->event.data);
1746 size += ltt_align(size, sizeof(guint16), tf->alignment);
1747 size += sizeof(guint16);
1748 size += sizeof(guint8);
1749 size += sizeof(guint8);
1750 size += sizeof(guint8);
1751 size += sizeof(guint8);
1752 size += sizeof(guint8);
1753 break;
1754 case MARKER_ID_SET_MARKER_FORMAT:
1755 g_debug("marker %s format set", (char*)tf->event.data);
1756 size = strlen((char*)tf->event.data) + 1;
1757 size += strlen((char*)tf->event.data + size) + 1;
1758 break;
1759 case MARKER_ID_HEARTBEAT_32:
1760 g_debug("Update Event heartbeat 32 bits");
1761 break;
1762 case MARKER_ID_HEARTBEAT_64:
1763 g_debug("Update Event heartbeat 64 bits");
1764 tscdata = (char*)(tf->event.data);
1765 tf->event.tsc = ltt_get_uint64(LTT_GET_BO(tf), tscdata);
1766 tf->buffer.tsc = tf->event.tsc;
1767 tf->event.event_time = ltt_interpolate_time(tf, &tf->event);
1768 size = ltt_align(size, sizeof(guint64), tf->alignment);
1769 size += sizeof(guint64);
1770 break;
1771 }
1772
1773 info = marker_get_info_from_id(tf->trace, tf->event.event_id);
1774
1775 if (tf->event.event_id >= MARKER_CORE_IDS)
1776 g_assert(info != NULL);
1777
1778 /* Do not update field offsets of core markers when initially reading the
1779 * facility tracefile when the infos about these markers do not exist yet.
1780 */
1781 if (likely(info && info->fields)) {
1782 if (info->size != -1)
1783 size = info->size;
1784 else
1785 size = marker_update_fields_offsets(marker_get_info_from_id(tf->trace,
1786 tf->event.event_id), tf->event.data);
1787 }
1788
1789 tf->event.data_size = size;
1790
1791 /* Check consistency between kernel and LTTV structure sizes */
1792 if(tf->event.event_size == 0xFFFF) {
1793 /* Event size too big to fit in the event size field */
1794 tf->event.event_size = tf->event.data_size;
1795 }
1796
1797 if (a_event_debug)
1798 print_debug_event_data(&tf->event);
1799
1800 /* Having a marker load or marker format event out of the facilities
1801 * tracefiles is a serious bug. */
1802 switch((enum marker_id)tf->event.event_id) {
1803 case MARKER_ID_SET_MARKER_ID:
1804 case MARKER_ID_SET_MARKER_FORMAT:
1805 if (tf->name != g_quark_from_string("/control/facilities"))
1806 g_error("Trace inconsistency : metadata event found in data "
1807 "tracefile %s", g_quark_to_string(tf->long_name));
1808 }
1809
1810 if (tf->event.data_size != tf->event.event_size) {
1811 struct marker_info *info = marker_get_info_from_id(tf->trace,
1812 tf->event.event_id);
1813 g_error("Kernel/LTTV event size differs for event %s: kernel %u, LTTV %u",
1814 g_quark_to_string(info->name),
1815 tf->event.event_size, tf->event.data_size);
1816 exit(-1);
1817 }
1818 }
1819
1820
1821 /* Take the tf current event offset and use the event facility id and event id
1822 * to figure out where is the next event offset.
1823 *
1824 * This is an internal function not aiming at being used elsewhere : it will
1825 * not jump over the current block limits. Please consider using
1826 * ltt_tracefile_read to do this.
1827 *
1828 * Returns 0 on success
1829 * ERANGE if we are at the end of the buffer.
1830 * ENOPROTOOPT if an error occured when getting the current event size.
1831 */
1832 static int ltt_seek_next_event(LttTracefile *tf)
1833 {
1834 int ret = 0;
1835 void *pos;
1836
1837 /* seek over the buffer header if we are at the buffer start */
1838 if(tf->event.offset == 0) {
1839 tf->event.offset += tf->buffer_header_size;
1840
1841 if(tf->event.offset == tf->buf_size - tf->buffer.lost_size) {
1842 ret = ERANGE;
1843 }
1844 goto found;
1845 }
1846
1847
1848 pos = tf->event.data;
1849
1850 if(tf->event.data_size < 0) goto error;
1851
1852 pos += (size_t)tf->event.data_size;
1853
1854 tf->event.offset = pos - tf->buffer.head;
1855
1856 if(tf->event.offset == tf->buf_size - tf->buffer.lost_size) {
1857 ret = ERANGE;
1858 goto found;
1859 }
1860 g_assert(tf->event.offset < tf->buf_size - tf->buffer.lost_size);
1861
1862 found:
1863 return ret;
1864
1865 error:
1866 g_error("Error in ltt_seek_next_event for tracefile %s",
1867 g_quark_to_string(tf->name));
1868 return ENOPROTOOPT;
1869 }
1870
1871 #if 0
1872 /*****************************************************************************
1873 *Function name
1874 * calc_nsecs_per_cycle : calculate nsecs per cycle for current block
1875 *
1876 * 1.0 / (freq(khz) *1000) * 1000000000
1877 *Input Params
1878 * t : tracefile
1879 ****************************************************************************/
1880 /* from timer_tsc.c */
1881 #define CYC2NS_SCALE_FACTOR 10
1882 static guint32 calc_nsecs_per_cycle(LttTracefile * tf)
1883 {
1884 //return 1e6 / (double)tf->buffer.freq;
1885 guint32 cpu_mhz = tf->buffer.freq / 1000;
1886 guint32 cyc2ns_scale = (1000 << CYC2NS_SCALE_FACTOR)/cpu_mhz;
1887
1888 return cyc2ns_scale;
1889 // return 1e6 / (double)tf->buffer.freq;
1890 }
1891
1892 static guint64 cycles_2_ns(LttTracefile *tf, guint64 cycles)
1893 {
1894 return (cycles * tf->buffer.cyc2ns_scale) >> CYC2NS_SCALE_FACTOR;
1895 }
1896 #endif //0
1897
1898 #if 0
1899 void setFieldsOffset(LttTracefile *tf, LttEventType *evT,void *evD)
1900 {
1901 LttField * rootFld = evT->root_field;
1902 // rootFld->base_address = evD;
1903
1904 if(likely(rootFld))
1905 rootFld->field_size = getFieldtypeSize(tf, evT->facility,
1906 evT, 0,0,rootFld, evD);
1907 }
1908 #endif //0
1909 #if 0
1910 /*****************************************************************************
1911 *Function name
1912 * set_fields_offsets : set the precomputable offset of the fields
1913 *Input params
1914 * tracefile : opened trace file
1915 * event_type : the event type
1916 ****************************************************************************/
1917
1918 void set_fields_offsets(LttTracefile *tf, LttEventType *event_type)
1919 {
1920 LttField *field = event_type->root_field;
1921 enum field_status fixed_root = FIELD_FIXED, fixed_parent = FIELD_FIXED;
1922
1923 if(likely(field))
1924 preset_field_type_size(tf, event_type, 0, 0,
1925 &fixed_root, &fixed_parent,
1926 field);
1927
1928 }
1929 #endif //0
1930
1931
1932 /*****************************************************************************
1933 *Function name
1934 * get_alignment : Get the alignment needed for a field.
1935 *Input params
1936 * field : field
1937 *
1938 * returns : The size on which it must be aligned.
1939 *
1940 ****************************************************************************/
1941 #if 0
1942 off_t get_alignment(LttField *field)
1943 {
1944 LttType *type = &field->field_type;
1945
1946 switch(type->type_class) {
1947 case LTT_INT_FIXED:
1948 case LTT_UINT_FIXED:
1949 case LTT_POINTER:
1950 case LTT_CHAR:
1951 case LTT_UCHAR:
1952 case LTT_SHORT:
1953 case LTT_USHORT:
1954 case LTT_INT:
1955 case LTT_UINT:
1956 case LTT_LONG:
1957 case LTT_ULONG:
1958 case LTT_SIZE_T:
1959 case LTT_SSIZE_T:
1960 case LTT_OFF_T:
1961 case LTT_FLOAT:
1962 case LTT_ENUM:
1963 /* Align offset on type size */
1964 g_assert(field->field_size != 0);
1965 return field->field_size;
1966 break;
1967 case LTT_STRING:
1968 return 1;
1969 break;
1970 case LTT_ARRAY:
1971 g_assert(type->fields->len == 1);
1972 {
1973 LttField *child = &g_array_index(type->fields, LttField, 0);
1974 return get_alignment(child);
1975 }
1976 break;
1977 case LTT_SEQUENCE:
1978 g_assert(type->fields->len == 2);
1979 {
1980 off_t localign = 1;
1981 LttField *child = &g_array_index(type->fields, LttField, 0);
1982
1983 localign = max(localign, get_alignment(child));
1984
1985 child = &g_array_index(type->fields, LttField, 1);
1986 localign = max(localign, get_alignment(child));
1987
1988 return localign;
1989 }
1990 break;
1991 case LTT_STRUCT:
1992 case LTT_UNION:
1993 {
1994 guint i;
1995 off_t localign = 1;
1996
1997 for(i=0; i<type->fields->len; i++) {
1998 LttField *child = &g_array_index(type->fields, LttField, i);
1999 localign = max(localign, get_alignment(child));
2000 }
2001 return localign;
2002 }
2003 break;
2004 case LTT_NONE:
2005 default:
2006 g_error("get_alignment : unknown type");
2007 return -1;
2008 }
2009 }
2010
2011 #endif //0
2012
2013 /*****************************************************************************
2014 *Function name
2015 * field_compute_static_size : Determine the size of fields known by their
2016 * sole definition. Unions, arrays and struct sizes might be known, but
2017 * the parser does not give that information.
2018 *Input params
2019 * tf : tracefile
2020 * field : field
2021 *
2022 ****************************************************************************/
2023 #if 0
2024 void field_compute_static_size(LttFacility *fac, LttField *field)
2025 {
2026 LttType *type = &field->field_type;
2027
2028 switch(type->type_class) {
2029 case LTT_INT_FIXED:
2030 case LTT_UINT_FIXED:
2031 case LTT_POINTER:
2032 case LTT_CHAR:
2033 case LTT_UCHAR:
2034 case LTT_SHORT:
2035 case LTT_USHORT:
2036 case LTT_INT:
2037 case LTT_UINT:
2038 case LTT_LONG:
2039 case LTT_ULONG:
2040 case LTT_SIZE_T:
2041 case LTT_SSIZE_T:
2042 case LTT_OFF_T:
2043 case LTT_FLOAT:
2044 case LTT_ENUM:
2045 case LTT_STRING:
2046 /* nothing to do */
2047 break;
2048 case LTT_ARRAY:
2049 /* note this : array type size is the number of elements in the array,
2050 * while array field size of the length of the array in bytes */
2051 g_assert(type->fields->len == 1);
2052 {
2053 LttField *child = &g_array_index(type->fields, LttField, 0);
2054 field_compute_static_size(fac, child);
2055
2056 if(child->field_size != 0) {
2057 field->field_size = type->size * child->field_size;
2058 field->dynamic_offsets = g_array_sized_new(FALSE, TRUE,
2059 sizeof(off_t), type->size);
2060 } else {
2061 field->field_size = 0;
2062 }
2063 }
2064 break;
2065 case LTT_SEQUENCE:
2066 g_assert(type->fields->len == 2);
2067 {
2068 off_t local_offset = 0;
2069 LttField *child = &g_array_index(type->fields, LttField, 1);
2070 field_compute_static_size(fac, child);
2071 field->field_size = 0;
2072 type->size = 0;
2073 if(child->field_size != 0) {
2074 field->dynamic_offsets = g_array_sized_new(FALSE, TRUE,
2075 sizeof(off_t), SEQUENCE_AVG_ELEMENTS);
2076 }
2077 }
2078 break;
2079 case LTT_STRUCT:
2080 case LTT_UNION:
2081 {
2082 guint i;
2083 for(i=0;i<type->fields->len;i++) {
2084 LttField *child = &g_array_index(type->fields, LttField, i);
2085 field_compute_static_size(fac, child);
2086 if(child->field_size != 0) {
2087 type->size += ltt_align(type->size, get_alignment(child),
2088 fac->alignment);
2089 type->size += child->field_size;
2090 } else {
2091 /* As soon as we find a child with variable size, we have
2092 * a variable size */
2093 type->size = 0;
2094 break;
2095 }
2096 }
2097 field->field_size = type->size;
2098 }
2099 break;
2100 default:
2101 g_error("field_static_size : unknown type");
2102 }
2103
2104 }
2105 #endif //0
2106
2107
2108 /*****************************************************************************
2109 *Function name
2110 * precompute_fields_offsets : set the precomputable offset of the fields
2111 *Input params
2112 * fac : facility
2113 * field : the field
2114 * offset : pointer to the current offset, must be incremented
2115 *
2116 * return : 1 : found a variable length field, stop the processing.
2117 * 0 otherwise.
2118 ****************************************************************************/
2119
2120 #if 0
2121 gint precompute_fields_offsets(LttFacility *fac, LttField *field, off_t *offset, gint is_compact)
2122 {
2123 LttType *type = &field->field_type;
2124
2125 if(unlikely(is_compact)) {
2126 g_assert(field->field_size != 0);
2127 /* FIXME THIS IS A HUUUUUGE hack :
2128 * offset is between the compact_data field in struct LttEvent
2129 * and the address of the field root in the memory map.
2130 * ark. Both will stay at the same addresses while the event
2131 * is readable, so it's ok.
2132 */
2133 field->offset_root = 0;
2134 field->fixed_root = FIELD_FIXED;
2135 return 0;
2136 }
2137
2138 switch(type->type_class) {
2139 case LTT_INT_FIXED:
2140 case LTT_UINT_FIXED:
2141 case LTT_POINTER:
2142 case LTT_CHAR:
2143 case LTT_UCHAR:
2144 case LTT_SHORT:
2145 case LTT_USHORT:
2146 case LTT_INT:
2147 case LTT_UINT:
2148 case LTT_LONG:
2149 case LTT_ULONG:
2150 case LTT_SIZE_T:
2151 case LTT_SSIZE_T:
2152 case LTT_OFF_T:
2153 case LTT_FLOAT:
2154 case LTT_ENUM:
2155 g_assert(field->field_size != 0);
2156 /* Align offset on type size */
2157 *offset += ltt_align(*offset, get_alignment(field),
2158 fac->alignment);
2159 /* remember offset */
2160 field->offset_root = *offset;
2161 field->fixed_root = FIELD_FIXED;
2162 /* Increment offset */
2163 *offset += field->field_size;
2164 return 0;
2165 break;
2166 case LTT_STRING:
2167 field->offset_root = *offset;
2168 field->fixed_root = FIELD_FIXED;
2169 return 1;
2170 break;
2171 case LTT_ARRAY:
2172 g_assert(type->fields->len == 1);
2173 {
2174 LttField *child = &g_array_index(type->fields, LttField, 0);
2175
2176 *offset += ltt_align(*offset, get_alignment(field),
2177 fac->alignment);
2178
2179 /* remember offset */
2180 field->offset_root = *offset;
2181 field->array_offset = *offset;
2182 field->fixed_root = FIELD_FIXED;
2183
2184 /* Let the child be variable */
2185 //precompute_fields_offsets(tf, child, offset);
2186
2187 if(field->field_size != 0) {
2188 /* Increment offset */
2189 /* field_size is the array size in bytes */
2190 *offset += field->field_size;
2191 return 0;
2192 } else {
2193 return 1;
2194 }
2195 }
2196 break;
2197 case LTT_SEQUENCE:
2198 g_assert(type->fields->len == 2);
2199 {
2200 LttField *child;
2201 guint ret;
2202
2203 *offset += ltt_align(*offset, get_alignment(field),
2204 fac->alignment);
2205
2206 /* remember offset */
2207 field->offset_root = *offset;
2208 field->fixed_root = FIELD_FIXED;
2209
2210 child = &g_array_index(type->fields, LttField, 0);
2211 ret = precompute_fields_offsets(fac, child, offset, is_compact);
2212 g_assert(ret == 0); /* Seq len cannot have variable len */
2213
2214 child = &g_array_index(type->fields, LttField, 1);
2215 *offset += ltt_align(*offset, get_alignment(child),
2216 fac->alignment);
2217 field->array_offset = *offset;
2218 /* Let the child be variable. */
2219 //ret = precompute_fields_offsets(fac, child, offset);
2220
2221 /* Cannot precompute fields offsets of sequence members, and has
2222 * variable length. */
2223 return 1;
2224 }
2225 break;
2226 case LTT_STRUCT:
2227 {
2228 LttField *child;
2229 guint i;
2230 gint ret=0;
2231
2232 *offset += ltt_align(*offset, get_alignment(field),
2233 fac->alignment);
2234 /* remember offset */
2235 field->offset_root = *offset;
2236 field->fixed_root = FIELD_FIXED;
2237
2238 for(i=0; i< type->fields->len; i++) {
2239 child = &g_array_index(type->fields, LttField, i);
2240 ret = precompute_fields_offsets(fac, child, offset, is_compact);
2241
2242 if(ret) break;
2243 }
2244 return ret;
2245 }
2246 break;
2247 case LTT_UNION:
2248 {
2249 LttField *child;
2250 guint i;
2251 gint ret=0;
2252
2253 *offset += ltt_align(*offset, get_alignment(field),
2254 fac->alignment);
2255 /* remember offset */
2256 field->offset_root = *offset;
2257 field->fixed_root = FIELD_FIXED;
2258
2259 for(i=0; i< type->fields->len; i++) {
2260 *offset = field->offset_root;
2261 child = &g_array_index(type->fields, LttField, i);
2262 ret = precompute_fields_offsets(fac, child, offset, is_compact);
2263
2264 if(ret) break;
2265 }
2266 *offset = field->offset_root + field->field_size;
2267 return ret;
2268 }
2269
2270 break;
2271 case LTT_NONE:
2272 default:
2273 g_error("precompute_fields_offsets : unknown type");
2274 return 1;
2275 }
2276
2277 }
2278
2279 #endif //0
2280
2281 #if 0
2282 /*****************************************************************************
2283 *Function name
2284 * precompute_offsets : set the precomputable offset of an event type
2285 *Input params
2286 * tf : tracefile
2287 * event : event type
2288 *
2289 ****************************************************************************/
2290 void precompute_offsets(LttFacility *fac, LttEventType *event)
2291 {
2292 guint i;
2293 off_t offset = 0;
2294 gint ret;
2295
2296 /* First, compute the size of fixed size fields. Will determine size for
2297 * arrays, struct and unions, which is not done by the parser */
2298 for(i=0; i<event->fields->len; i++) {
2299 LttField *field = &g_array_index(event->fields, LttField, i);
2300 field_compute_static_size(fac, field);
2301 }
2302
2303 /* Precompute all known offsets */
2304 for(i=0; i<event->fields->len; i++) {
2305 LttField *field = &g_array_index(event->fields, LttField, i);
2306 if(event->has_compact_data && i == 0)
2307 ret = precompute_fields_offsets(fac, field, &offset, 1);
2308 else
2309 ret = precompute_fields_offsets(fac, field, &offset, 0);
2310 if(ret) break;
2311 }
2312 }
2313 #endif //0
2314
2315
2316
2317 /*****************************************************************************
2318 *Function name
2319 * preset_field_type_size : set the fixed sizes of the field type
2320 *Input params
2321 * tf : tracefile
2322 * event_type : event type
2323 * offset_root : offset from the root
2324 * offset_parent : offset from the parent
2325 * fixed_root : Do we know a fixed offset to the root ?
2326 * fixed_parent : Do we know a fixed offset to the parent ?
2327 * field : field
2328 ****************************************************************************/
2329
2330
2331
2332 // preset the fixed size offsets. Calculate them just like genevent-new : an
2333 // increment of a *to value that represents the offset from the start of the
2334 // event data.
2335 // The preset information is : offsets up to (and including) the first element
2336 // of variable size. All subsequent fields must be flagged "VARIABLE OFFSET".
2337 #if 0
2338 void preset_field_type_size(LttTracefile *tf, LttEventType *event_type,
2339 off_t offset_root, off_t offset_parent,
2340 enum field_status *fixed_root, enum field_status *fixed_parent,
2341 LttField *field)
2342 {
2343 enum field_status local_fixed_root, local_fixed_parent;
2344 guint i;
2345 LttType *type;
2346
2347 g_assert(field->fixed_root == FIELD_UNKNOWN);
2348 g_assert(field->fixed_parent == FIELD_UNKNOWN);
2349 g_assert(field->fixed_size == FIELD_UNKNOWN);
2350
2351 type = field->field_type;
2352
2353 field->fixed_root = *fixed_root;
2354 if(field->fixed_root == FIELD_FIXED)
2355 field->offset_root = offset_root;
2356 else
2357 field->offset_root = 0;
2358
2359 field->fixed_parent = *fixed_parent;
2360 if(field->fixed_parent == FIELD_FIXED)
2361 field->offset_parent = offset_parent;
2362 else
2363 field->offset_parent = 0;
2364
2365 size_t current_root_offset;
2366 size_t current_offset;
2367 enum field_status current_child_status, final_child_status;
2368 size_t max_size;
2369
2370 switch(type->type_class) {
2371 case LTT_INT_FIXED:
2372 case LTT_UINT_FIXED:
2373 case LTT_CHAR:
2374 case LTT_UCHAR:
2375 case LTT_SHORT:
2376 case LTT_USHORT:
2377 case LTT_INT:
2378 case LTT_UINT:
2379 case LTT_FLOAT:
2380 case LTT_ENUM:
2381 field->field_size = ltt_type_size(tf->trace, type);
2382 field->fixed_size = FIELD_FIXED;
2383 break;
2384 case LTT_POINTER:
2385 field->field_size = (off_t)event_type->facility->pointer_size;
2386 field->fixed_size = FIELD_FIXED;
2387 break;
2388 case LTT_LONG:
2389 case LTT_ULONG:
2390 field->field_size = (off_t)event_type->facility->long_size;
2391 field->fixed_size = FIELD_FIXED;
2392 break;
2393 case LTT_SIZE_T:
2394 case LTT_SSIZE_T:
2395 case LTT_OFF_T:
2396 field->field_size = (off_t)event_type->facility->size_t_size;
2397 field->fixed_size = FIELD_FIXED;
2398 break;
2399 case LTT_SEQUENCE:
2400 local_fixed_root = FIELD_VARIABLE;
2401 local_fixed_parent = FIELD_VARIABLE;
2402 preset_field_type_size(tf, event_type,
2403 0, 0,
2404 &local_fixed_root, &local_fixed_parent,
2405 field->child[0]);
2406 field->fixed_size = FIELD_VARIABLE;
2407 field->field_size = 0;
2408 *fixed_root = FIELD_VARIABLE;
2409 *fixed_parent = FIELD_VARIABLE;
2410 break;
2411 case LTT_STRING:
2412 field->fixed_size = FIELD_VARIABLE;
2413 field->field_size = 0;
2414 *fixed_root = FIELD_VARIABLE;
2415 *fixed_parent = FIELD_VARIABLE;
2416 break;
2417 case LTT_ARRAY:
2418 local_fixed_root = FIELD_VARIABLE;
2419 local_fixed_parent = FIELD_VARIABLE;
2420 preset_field_type_size(tf, event_type,
2421 0, 0,
2422 &local_fixed_root, &local_fixed_parent,
2423 field->child[0]);
2424 field->fixed_size = field->child[0]->fixed_size;
2425 if(field->fixed_size == FIELD_FIXED) {
2426 field->field_size = type->element_number * field->child[0]->field_size;
2427 } else {
2428 field->field_size = 0;
2429 *fixed_root = FIELD_VARIABLE;
2430 *fixed_parent = FIELD_VARIABLE;
2431 }
2432 break;
2433 case LTT_STRUCT:
2434 current_root_offset = field->offset_root;
2435 current_offset = 0;
2436 current_child_status = FIELD_FIXED;
2437 for(i=0;i<type->element_number;i++) {
2438 preset_field_type_size(tf, event_type,
2439 current_root_offset, current_offset,
2440 fixed_root, &current_child_status,
2441 field->child[i]);
2442 if(current_child_status == FIELD_FIXED) {
2443 current_root_offset += field->child[i]->field_size;
2444 current_offset += field->child[i]->field_size;
2445 } else {
2446 current_root_offset = 0;
2447 current_offset = 0;
2448 }
2449 }
2450 if(current_child_status != FIELD_FIXED) {
2451 *fixed_parent = current_child_status;
2452 field->field_size = 0;
2453 field->fixed_size = current_child_status;
2454 } else {
2455 field->field_size = current_offset;
2456 field->fixed_size = FIELD_FIXED;
2457 }
2458 break;
2459 case LTT_UNION:
2460 current_root_offset = field->offset_root;
2461 current_offset = 0;
2462 max_size = 0;
2463 final_child_status = FIELD_FIXED;
2464 for(i=0;i<type->element_number;i++) {
2465 enum field_status current_root_child_status = FIELD_FIXED;
2466 enum field_status current_child_status = FIELD_FIXED;
2467 preset_field_type_size(tf, event_type,
2468 current_root_offset, current_offset,
2469 &current_root_child_status, &current_child_status,
2470 field->child[i]);
2471 if(current_child_status != FIELD_FIXED)
2472 final_child_status = current_child_status;
2473 else
2474 max_size = max(max_size, field->child[i]->field_size);
2475 }
2476 if(final_child_status != FIELD_FIXED) {
2477 g_error("LTTV does not support variable size fields in unions.");
2478 /* This will stop the application. */
2479 *fixed_root = final_child_status;
2480 *fixed_parent = final_child_status;
2481 field->field_size = 0;
2482 field->fixed_size = current_child_status;
2483 } else {
2484 field->field_size = max_size;
2485 field->fixed_size = FIELD_FIXED;
2486 }
2487 break;
2488 case LTT_NONE:
2489 g_error("unexpected type NONE");
2490 break;
2491 }
2492
2493 }
2494 #endif //0
2495
2496 /*****************************************************************************
2497 *Function name
2498 * check_fields_compatibility : Check for compatibility between two fields :
2499 * do they use the same inner structure ?
2500 *Input params
2501 * event_type1 : event type
2502 * event_type2 : event type
2503 * field1 : field
2504 * field2 : field
2505 *Returns : 0 if identical
2506 * 1 if not.
2507 ****************************************************************************/
2508 // this function checks for equality of field types. Therefore, it does not use
2509 // per se offsets. For instance, an aligned version of a structure is
2510 // compatible with an unaligned version of the same structure.
2511 #if 0
2512 gint check_fields_compatibility(LttEventType *event_type1,
2513 LttEventType *event_type2,
2514 LttField *field1, LttField *field2)
2515 {
2516 guint different = 0;
2517 LttType *type1;
2518 LttType *type2;
2519
2520 if(field1 == NULL) {
2521 if(field2 == NULL) goto end;
2522 else {
2523 different = 1;
2524 goto end;
2525 }
2526 } else if(field2 == NULL) {
2527 different = 1;
2528 goto end;
2529 }
2530
2531 type1 = &field1->field_type;
2532 type2 = &field2->field_type;
2533
2534 if(type1->type_class != type2->type_class) {
2535 different = 1;
2536 goto end;
2537 }
2538 if(type1->network != type2->network) {
2539 different = 1;
2540 goto end;
2541 }
2542
2543 switch(type1->type_class) {
2544 case LTT_INT_FIXED:
2545 case LTT_UINT_FIXED:
2546 case LTT_POINTER:
2547 case LTT_CHAR:
2548 case LTT_UCHAR:
2549 case LTT_SHORT:
2550 case LTT_USHORT:
2551 case LTT_INT:
2552 case LTT_UINT:
2553 case LTT_LONG:
2554 case LTT_ULONG:
2555 case LTT_SIZE_T:
2556 case LTT_SSIZE_T:
2557 case LTT_OFF_T:
2558 case LTT_FLOAT:
2559 case LTT_ENUM:
2560 if(field1->field_size != field2->field_size)
2561 different = 1;
2562 break;
2563 case LTT_STRING:
2564 break;
2565 case LTT_ARRAY:
2566 {
2567 LttField *child1 = &g_array_index(type1->fields, LttField, 0);
2568 LttField *child2 = &g_array_index(type2->fields, LttField, 0);
2569
2570 if(type1->size != type2->size)
2571 different = 1;
2572 if(check_fields_compatibility(event_type1, event_type2, child1, child2))
2573 different = 1;
2574 }
2575 break;
2576 case LTT_SEQUENCE:
2577 {
2578 LttField *child1 = &g_array_index(type1->fields, LttField, 1);
2579 LttField *child2 = &g_array_index(type2->fields, LttField, 1);
2580
2581 if(check_fields_compatibility(event_type1, event_type2, child1, child2))
2582 different = 1;
2583 }
2584 break;
2585 case LTT_STRUCT:
2586 case LTT_UNION:
2587 {
2588 LttField *child;
2589 guint i;
2590
2591 if(type1->fields->len != type2->fields->len) {
2592 different = 1;
2593 goto end;
2594 }
2595
2596 for(i=0; i< type1->fields->len; i++) {
2597 LttField *child1;
2598 LttField *child2;
2599 child1 = &g_array_index(type1->fields, LttField, i);
2600 child2 = &g_array_index(type2->fields, LttField, i);
2601 different = check_fields_compatibility(event_type1,
2602 event_type2, child1, child2);
2603
2604 if(different) break;
2605 }
2606 }
2607 break;
2608 case LTT_NONE:
2609 default:
2610 g_error("check_fields_compatibility : unknown type");
2611 }
2612
2613 end:
2614 return different;
2615 }
2616 #endif //0
2617
2618 #if 0
2619 gint check_fields_compatibility(LttEventType *event_type1,
2620 LttEventType *event_type2,
2621 LttField *field1, LttField *field2)
2622 {
2623 guint different = 0;
2624 guint i;
2625 LttType *type1;
2626 LttType *type2;
2627
2628 if(field1 == NULL) {
2629 if(field2 == NULL) goto end;
2630 else {
2631 different = 1;
2632 goto end;
2633 }
2634 } else if(field2 == NULL) {
2635 different = 1;
2636 goto end;
2637 }
2638
2639 g_assert(field1->fixed_root != FIELD_UNKNOWN);
2640 g_assert(field2->fixed_root != FIELD_UNKNOWN);
2641 g_assert(field1->fixed_parent != FIELD_UNKNOWN);
2642 g_assert(field2->fixed_parent != FIELD_UNKNOWN);
2643 g_assert(field1->fixed_size != FIELD_UNKNOWN);
2644 g_assert(field2->fixed_size != FIELD_UNKNOWN);
2645
2646 type1 = field1->field_type;
2647 type2 = field2->field_type;
2648
2649 if(type1->type_class != type2->type_class) {
2650 different = 1;
2651 goto end;
2652 }
2653 if(type1->element_name != type2->element_name) {
2654 different = 1;
2655 goto end;
2656 }
2657
2658 switch(type1->type_class) {
2659 case LTT_INT_FIXED:
2660 case LTT_UINT_FIXED:
2661 case LTT_POINTER:
2662 case LTT_CHAR:
2663 case LTT_UCHAR:
2664 case LTT_SHORT:
2665 case LTT_USHORT:
2666 case LTT_INT:
2667 case LTT_UINT:
2668 case LTT_FLOAT:
2669 case LTT_POINTER:
2670 case LTT_LONG:
2671 case LTT_ULONG:
2672 case LTT_SIZE_T:
2673 case LTT_SSIZE_T:
2674 case LTT_OFF_T:
2675 if(field1->field_size != field2->field_size) {
2676 different = 1;
2677 goto end;
2678 }
2679 break;
2680 case LTT_ENUM:
2681 if(type1->element_number != type2->element_number) {
2682 different = 1;
2683 goto end;
2684 }
2685 for(i=0;i<type1->element_number;i++) {
2686 if(type1->enum_strings[i] != type2->enum_strings[i]) {
2687 different = 1;
2688 goto end;
2689 }
2690 }
2691 break;
2692 case LTT_SEQUENCE:
2693 /* Two elements : size and child */
2694 g_assert(type1->element_number != type2->element_number);
2695 for(i=0;i<type1->element_number;i++) {
2696 if(check_fields_compatibility(event_type1, event_type2,
2697 field1->child[0], field2->child[0])) {
2698 different = 1;
2699 goto end;
2700 }
2701 }
2702 break;
2703 case LTT_STRING:
2704 break;
2705 case LTT_ARRAY:
2706 if(field1->field_size != field2->field_size) {
2707 different = 1;
2708 goto end;
2709 }
2710 /* Two elements : size and child */
2711 g_assert(type1->element_number != type2->element_number);
2712 for(i=0;i<type1->element_number;i++) {
2713 if(check_fields_compatibility(event_type1, event_type2,
2714 field1->child[0], field2->child[0])) {
2715 different = 1;
2716 goto end;
2717 }
2718 }
2719 break;
2720 case LTT_STRUCT:
2721 case LTT_UNION:
2722 if(type1->element_number != type2->element_number) {
2723 different = 1;
2724 break;
2725 }
2726 for(i=0;i<type1->element_number;i++) {
2727 if(check_fields_compatibility(event_type1, event_type2,
2728 field1->child[0], field2->child[0])) {
2729 different = 1;
2730 goto end;
2731 }
2732 }
2733 break;
2734 }
2735 end:
2736 return different;
2737 }
2738 #endif //0
2739
2740
2741 /*****************************************************************************
2742 *Function name
2743 * ltt_get_int : get an integer number
2744 *Input params
2745 * reverse_byte_order: must we reverse the byte order ?
2746 * size : the size of the integer
2747 * ptr : the data pointer
2748 *Return value
2749 * gint64 : a 64 bits integer
2750 ****************************************************************************/
2751
2752 gint64 ltt_get_int(gboolean reverse_byte_order, gint size, void *data)
2753 {
2754 gint64 val;
2755
2756 switch(size) {
2757 case 1: val = *((gint8*)data); break;
2758 case 2: val = ltt_get_int16(reverse_byte_order, data); break;
2759 case 4: val = ltt_get_int32(reverse_byte_order, data); break;
2760 case 8: val = ltt_get_int64(reverse_byte_order, data); break;
2761 default: val = ltt_get_int64(reverse_byte_order, data);
2762 g_critical("get_int : integer size %d unknown", size);
2763 break;
2764 }
2765
2766 return val;
2767 }
2768
2769 /*****************************************************************************
2770 *Function name
2771 * ltt_get_uint : get an unsigned integer number
2772 *Input params
2773 * reverse_byte_order: must we reverse the byte order ?
2774 * size : the size of the integer
2775 * ptr : the data pointer
2776 *Return value
2777 * guint64 : a 64 bits unsigned integer
2778 ****************************************************************************/
2779
2780 guint64 ltt_get_uint(gboolean reverse_byte_order, gint size, void *data)
2781 {
2782 guint64 val;
2783
2784 switch(size) {
2785 case 1: val = *((gint8*)data); break;
2786 case 2: val = ltt_get_uint16(reverse_byte_order, data); break;
2787 case 4: val = ltt_get_uint32(reverse_byte_order, data); break;
2788 case 8: val = ltt_get_uint64(reverse_byte_order, data); break;
2789 default: val = ltt_get_uint64(reverse_byte_order, data);
2790 g_critical("get_uint : unsigned integer size %d unknown",
2791 size);
2792 break;
2793 }
2794
2795 return val;
2796 }
2797
2798
2799 /* get the node name of the system */
2800
2801 char * ltt_trace_system_description_node_name (LttSystemDescription * s)
2802 {
2803 return s->node_name;
2804 }
2805
2806
2807 /* get the domain name of the system */
2808
2809 char * ltt_trace_system_description_domain_name (LttSystemDescription * s)
2810 {
2811 return s->domain_name;
2812 }
2813
2814
2815 /* get the description of the system */
2816
2817 char * ltt_trace_system_description_description (LttSystemDescription * s)
2818 {
2819 return s->description;
2820 }
2821
2822
2823 /* get the NTP corrected start time of the trace */
2824 LttTime ltt_trace_start_time(LttTrace *t)
2825 {
2826 return t->start_time;
2827 }
2828
2829 /* get the monotonic start time of the trace */
2830 LttTime ltt_trace_start_time_monotonic(LttTrace *t)
2831 {
2832 return t->start_time_from_tsc;
2833 }
2834
2835 static LttTracefile *ltt_tracefile_new()
2836 {
2837 LttTracefile *tf;
2838 tf = g_new(LttTracefile, 1);
2839 tf->event.tracefile = tf;
2840 return tf;
2841 }
2842
2843 static void ltt_tracefile_destroy(LttTracefile *tf)
2844 {
2845 g_free(tf);
2846 }
2847
2848 static void ltt_tracefile_copy(LttTracefile *dest, const LttTracefile *src)
2849 {
2850 *dest = *src;
2851 }
2852
2853 /* Before library loading... */
2854
2855 static __attribute__((constructor)) void init(void)
2856 {
2857 LTT_FACILITY_NAME_HEARTBEAT = g_quark_from_string("heartbeat");
2858 LTT_EVENT_NAME_HEARTBEAT = g_quark_from_string("heartbeat");
2859 LTT_EVENT_NAME_HEARTBEAT_FULL = g_quark_from_string("heartbeat_full");
2860
2861 LTT_TRACEFILE_NAME_FACILITIES = g_quark_from_string("/control/facilities");
2862 }
LTTng 2.x Viewer (LTTV)
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