6 #include <linux/errno.h>
8 #include <ltt/LTTTypes.h>
10 #include <ltt/trace.h>
12 #define DIR_NAME_SIZE 256
14 /* set the offset of the fields belonging to the event,
15 need the information of the archecture */
16 void setFieldsOffset(LttTracefile
*tf
,LttEventType
*evT
,void *evD
,LttTrace
*t
);
18 /* get the size of the field type according to the archtecture's
19 size and endian type(info of the archecture) */
20 int getFieldtypeSize(LttTracefile
* tf
, LttEventType
* evT
, int offsetRoot
,
21 int offsetParent
, LttField
*fld
, void *evD
, LttTrace
* t
);
23 /* read a fixed size or a block information from the file (fd) */
24 int readFile(int fd
, void * buf
, size_t size
, char * mesg
);
25 int readBlock(LttTracefile
* tf
, int whichBlock
);
27 /* calculate cycles per nsec for current block */
28 void getCyclePerNsec(LttTracefile
* t
);
30 /* reinitialize the info of the block which is already in the buffer */
31 void updateTracefile(LttTracefile
* tf
);
33 /* go to the next event */
34 int skipEvent(LttTracefile
* t
);
36 /* compare two time (LttTime), 0:t1=t2, -1:t1<t2, 1:t1>t2 */
37 int timecmp(LttTime
* t1
, LttTime
* t2
);
41 /*****************************************************************************
43 * ltt_tracefile_open : open a trace file, construct a LttTracefile
45 * t : the trace containing the tracefile
46 * fileName : path name of the trace file
48 * : a pointer to a tracefile
49 ****************************************************************************/
51 LttTracefile
* ltt_tracefile_open(LttTrace
* t
, char * fileName
)
54 struct stat lTDFStat
; /* Trace data file status */
55 BlockStart a_block_start
;
57 tf
= g_new(LttTracefile
, 1);
60 tf
->name
= g_strdup(fileName
);
62 tf
->fd
= open(fileName
, O_RDONLY
, 0);
64 g_error("Unable to open input data file %s\n", fileName
);
67 // Get the file's status
68 if(fstat(tf
->fd
, &lTDFStat
) < 0){
69 g_error("Unable to get the status of the input data file %s\n", fileName
);
72 // Is the file large enough to contain a trace
73 if(lTDFStat
.st_size
< sizeof(BlockStart
) + EVENT_HEADER_SIZE
){
74 g_print("The input data file %s does not contain a trace\n", fileName
);
81 //store the size of the file
82 tf
->file_size
= lTDFStat
.st_size
;
83 tf
->block_size
= t
->system_description
->ltt_block_size
;
84 tf
->block_number
= tf
->file_size
/ tf
->block_size
;
87 //allocate memory to contain the info of a block
88 tf
->buffer
= (void *) g_new(char, t
->system_description
->ltt_block_size
);
90 //read the first block
91 if(readBlock(tf
,1)) exit(1);
97 /*****************************************************************************
98 *Open control and per cpu tracefiles
99 ****************************************************************************/
101 void ltt_tracefile_open_cpu(LttTrace
*t
, char * tracefile_name
)
104 tf
= ltt_tracefile_open(t
,tracefile_name
);
106 t
->per_cpu_tracefile_number
++;
107 g_ptr_array_add(t
->per_cpu_tracefiles
, tf
);
110 void ltt_tracefile_open_control(LttTrace
*t
, char * control_name
)
120 tf
= ltt_tracefile_open(t
,control_name
);
122 t
->control_tracefile_number
++;
123 g_ptr_array_add(t
->control_tracefiles
,tf
);
125 //parse facilities tracefile to get base_id
126 if(strcmp(&control_name
[strlen(control_name
)-10],"facilities") ==0){
128 ev
= ltt_tracefile_read(tf
);
129 if(!ev
)return; // end of file
131 if(ev
->event_id
== TRACE_FACILITY_LOAD
){
133 fLoad
.name
= (char*)pos
;
134 fLoad
.checksum
= *(LttChecksum
*)(pos
+ strlen(fLoad
.name
));
135 fLoad
.base_code
= *(uint32_t*)(pos
+ strlen(fLoad
.name
) + sizeof(LttChecksum
));
137 for(i
=0;i
<t
->facility_number
;i
++){
138 f
= (LttFacility
*)g_ptr_array_index(t
->facilities
,i
);
139 if(strcmp(f
->name
,fLoad
.name
)==0 && fLoad
.checksum
==f
->checksum
){
140 f
->base_id
= fLoad
.base_code
;
144 if(i
==t
->facility_number
)
145 g_error("Facility: %s, checksum: %d is not founded\n",
146 fLoad
.name
,fLoad
.checksum
);
147 }else if(ev
->event_id
== TRACE_BLOCK_START
){
149 }else if(ev
->event_id
== TRACE_BLOCK_END
){
151 }else g_error("Not valid facilities trace file\n");
157 /*****************************************************************************
159 * ltt_tracefile_close: close a trace file,
161 * t : tracefile which will be closed
162 ****************************************************************************/
164 void ltt_tracefile_close(LttTracefile
*t
)
173 /*****************************************************************************
174 *Get system information
175 ****************************************************************************/
176 void getSystemInfo(LttSystemDescription
* des
, char * pathname
)
180 int entry_number
= 15;
181 char buf
[DIR_NAME_SIZE
];
182 char description
[4*DIR_NAME_SIZE
];
185 fp
= fopen(pathname
,"r");
187 g_error("Can not open file : %s\n", pathname
);
190 while(fgets(buf
,DIR_NAME_SIZE
, fp
)!= NULL
){
192 while(isspace(*ptr
)) ptr
++;
193 if(strlen(ptr
) == 0) continue;
197 if(strlen(ptr
) == 0) g_error("Not a valid file: %s\n", pathname
);
198 if(strncmp("<system",ptr
,7) !=0)g_error("Not a valid file: %s\n", pathname
);
200 for(i
=0;i
<entry_number
;i
++){
201 if(fgets(buf
,DIR_NAME_SIZE
, fp
)== NULL
)
202 g_error("Not a valid file: %s\n", pathname
);
203 buf
[strlen(buf
)-1] = '\0';
205 while(isspace(*ptr
)) ptr
++;
208 if(strncmp("node_name=",ptr
,10)!=0)
209 g_error("Not a valid file: %s\n", pathname
);
210 des
->node_name
= g_strdup(ptr
+10);
213 if(strncmp("domainname=",ptr
,11)!=0)
214 g_error("Not a valid file: %s\n", pathname
);
215 des
->domain_name
= g_strdup(ptr
+11);
218 if(strncmp("cpu=",ptr
,4)!=0)
219 g_error("Not a valid file: %s\n", pathname
);
220 des
->nb_cpu
= (unsigned)atoi(ptr
+4);
223 if(strncmp("arch_size=",ptr
,10)!=0)
224 g_error("Not a valid file: %s\n", pathname
);
225 if(strcmp(ptr
+10,"\"LP32\"") == 0) des
->size
= LTT_LP32
;
226 else if(strcmp(ptr
+10,"\"ILP32\"") == 0) des
->size
= LTT_ILP32
;
227 else if(strcmp(ptr
+10,"\"LP64\"") == 0) des
->size
= LTT_LP64
;
228 else if(strcmp(ptr
+10,"\"ILP64\"") == 0) des
->size
= LTT_ILP64
;
229 else if(strcmp(ptr
+10,"\"UNKNOWN\"") == 0) des
->size
= LTT_UNKNOWN
;
232 if(strncmp("endian=",ptr
,7)!=0)
233 g_error("Not a valid file: %s\n", pathname
);
234 if(strcmp(ptr
+7,"\"LITTLE_ENDIAN\"") == 0)
235 des
->endian
= LTT_LITTLE_ENDIAN
;
236 else if(strcmp(ptr
+7,"\"BIG_ENDIAN\"") == 0)
237 des
->endian
= LTT_BIG_ENDIAN
;
240 if(strncmp("kernel_name=",ptr
,12)!=0)
241 g_error("Not a valid file: %s\n", pathname
);
242 des
->kernel_name
= g_strdup(ptr
+12);
245 if(strncmp("kernel_release=",ptr
,15)!=0)
246 g_error("Not a valid file: %s\n", pathname
);
247 des
->kernel_release
= g_strdup(ptr
+15);
250 if(strncmp("kernel_version=",ptr
,15)!=0)
251 g_error("Not a valid file: %s\n", pathname
);
252 des
->kernel_version
= g_strdup(ptr
+15);
255 if(strncmp("machine=",ptr
,8)!=0)
256 g_error("Not a valid file: %s\n", pathname
);
257 des
->machine
= g_strdup(ptr
+8);
260 if(strncmp("processor=",ptr
,10)!=0)
261 g_error("Not a valid file: %s\n", pathname
);
262 des
->processor
= g_strdup(ptr
+10);
265 if(strncmp("hardware_platform=",ptr
,18)!=0)
266 g_error("Not a valid file: %s\n", pathname
);
267 des
->hardware_platform
= g_strdup(ptr
+18);
270 if(strncmp("operating_system=",ptr
,17)!=0)
271 g_error("Not a valid file: %s\n", pathname
);
272 des
->operating_system
= g_strdup(ptr
+17);
275 if(strncmp("ltt_major_version=",ptr
,18)!=0)
276 g_error("Not a valid file: %s\n", pathname
);
278 // ptr++;//skip begining "
279 // ptr[strlen(ptr)-1] = '\0'; //get rid of the ending "
280 des
->ltt_major_version
= (unsigned)atoi(ptr
);
283 if(strncmp("ltt_minor_version=",ptr
,18)!=0)
284 g_error("Not a valid file: %s\n", pathname
);
286 // ptr++;//skip begining "
287 // ptr[strlen(ptr)-1] = '\0'; //get rid of the ending "
288 des
->ltt_minor_version
= (unsigned)atoi(ptr
);
291 if(strncmp("ltt_block_size=",ptr
,15)!=0)
292 g_error("Not a valid file: %s\n", pathname
);
294 // ptr++;//skip begining "
295 // ptr[strlen(ptr)-1] = '\0'; //get rid of the ending "
296 des
->ltt_block_size
= (unsigned)atoi(ptr
);
299 g_error("Not a valid file: %s\n", pathname
);
304 description
[0] = '\0';
305 if(fgets(buf
,DIR_NAME_SIZE
, fp
)== NULL
)
306 g_error("Not a valid file: %s\n", pathname
);
308 while(isspace(*ptr
)) ptr
++;
309 if(*ptr
!= '>') g_error("Not a valid file: %s\n", pathname
);
310 while((ptr
=fgets(buf
,DIR_NAME_SIZE
, fp
))!= NULL
){
312 while(isspace(*ptr
)) ptr
++;
313 if(strncmp("</system>",ptr
,9) == 0 )break;
314 strcat(description
, buf
);
316 if(!ptr
)g_error("Not a valid file: %s\n", pathname
);
317 if(description
[0] = '\0')des
->description
= NULL
;
318 des
->description
= g_strdup(description
);
323 /*****************************************************************************
324 *The following functions get facility/tracefile information
325 ****************************************************************************/
327 void getFacilityInfo(LttTrace
*t
, char* eventdefs
)
330 struct dirent
*entry
;
335 char name
[DIR_NAME_SIZE
];
337 dir
= opendir(eventdefs
);
338 if(!dir
) g_error("Can not open directory: %s\n", eventdefs
);
340 while((entry
= readdir(dir
)) != NULL
){
341 ptr
= &entry
->d_name
[strlen(entry
->d_name
)-4];
342 if(strcmp(ptr
,".xml") != 0) continue;
343 strcpy(name
,eventdefs
);
344 strcat(name
,entry
->d_name
);
345 ltt_facility_open(t
,name
);
349 for(j
=0;j
<t
->facility_number
;j
++){
350 f
= (LttFacility
*)g_ptr_array_index(t
->facilities
, j
);
351 for(i
=0; i
<f
->event_number
; i
++){
353 setFieldsOffset(NULL
, et
, NULL
, t
);
358 void getControlFileInfo(LttTrace
*t
, char* control
)
361 struct dirent
*entry
;
362 char name
[DIR_NAME_SIZE
];
364 dir
= opendir(control
);
365 if(!dir
) g_error("Can not open directory: %s\n", control
);
367 while((entry
= readdir(dir
)) != NULL
){
368 if(strcmp(entry
->d_name
,"facilities") != 0 &&
369 strcmp(entry
->d_name
,"interrupts") != 0 &&
370 strcmp(entry
->d_name
,"processes") != 0) continue;
372 strcpy(name
,control
);
373 strcat(name
,entry
->d_name
);
374 ltt_tracefile_open_control(t
,name
);
379 void getCpuFileInfo(LttTrace
*t
, char* cpu
)
382 struct dirent
*entry
;
383 char name
[DIR_NAME_SIZE
];
386 if(!dir
) g_error("Can not open directory: %s\n", cpu
);
388 while((entry
= readdir(dir
)) != NULL
){
389 if(strcmp(entry
->d_name
,".") != 0 &&
390 strcmp(entry
->d_name
,"..") != 0 ){
392 strcat(name
,entry
->d_name
);
393 ltt_tracefile_open_cpu(t
,name
);
399 /*****************************************************************************
400 *A trace is specified as a pathname to the directory containing all the
401 *associated data (control tracefiles, per cpu tracefiles, event
404 *When a trace is closed, all the associated facilities, types and fields
405 *are released as well.
406 ****************************************************************************/
408 LttTrace
*ltt_trace_open(char *pathname
)
411 LttSystemDescription
* sys_description
;
412 char eventdefs
[DIR_NAME_SIZE
];
413 char info
[DIR_NAME_SIZE
];
414 char control
[DIR_NAME_SIZE
];
415 char cpu
[DIR_NAME_SIZE
];
416 char tmp
[DIR_NAME_SIZE
];
417 gboolean has_slash
= FALSE
;
419 //establish the pathname to different directories
420 if(pathname
[strlen(pathname
)-1] == '/')has_slash
= TRUE
;
421 strcpy(eventdefs
,pathname
);
422 if(!has_slash
)strcat(eventdefs
,"/");
423 strcat(eventdefs
,"eventdefs/");
425 strcpy(info
,pathname
);
426 if(!has_slash
)strcat(info
,"/");
427 strcat(info
,"info/");
429 strcpy(control
,pathname
);
430 if(!has_slash
)strcat(control
,"/");
431 strcat(control
,"control/");
433 strcpy(cpu
,pathname
);
434 if(!has_slash
)strcat(cpu
,"/");
438 t
= g_new(LttTrace
, 1);
439 sys_description
= g_new(LttSystemDescription
, 1);
440 t
->pathname
= g_strdup(pathname
);
441 t
->facility_number
= 0;
442 t
->control_tracefile_number
= 0;
443 t
->per_cpu_tracefile_number
= 0;
444 t
->system_description
= sys_description
;
445 t
->control_tracefiles
= g_ptr_array_new();
446 t
->per_cpu_tracefiles
= g_ptr_array_new();
447 t
->facilities
= g_ptr_array_new();
448 getDataEndianType(&(t
->my_arch_size
), &(t
->my_arch_endian
));
450 //get system description
452 strcat(tmp
,"system.xml");
453 getSystemInfo(sys_description
, tmp
);
455 //get facilities info
456 getFacilityInfo(t
,eventdefs
);
458 //get control tracefile info
459 getControlFileInfo(t
,control
);
461 //get cpu tracefile info
462 getCpuFileInfo(t
,cpu
);
467 void ltt_trace_close(LttTrace
*t
)
475 //free system_description
476 g_free(t
->system_description
->description
);
477 g_free(t
->system_description
->node_name
);
478 g_free(t
->system_description
->domain_name
);
479 g_free(t
->system_description
->kernel_name
);
480 g_free(t
->system_description
->kernel_release
);
481 g_free(t
->system_description
->kernel_version
);
482 g_free(t
->system_description
->machine
);
483 g_free(t
->system_description
->processor
);
484 g_free(t
->system_description
->hardware_platform
);
485 g_free(t
->system_description
->operating_system
);
486 g_free(t
->system_description
);
488 //free control_tracefiles
489 for(i
=0;i
<t
->control_tracefile_number
;i
++){
490 tf
= (LttTracefile
*)g_ptr_array_index(t
->control_tracefiles
,i
);
491 ltt_tracefile_close(tf
);
493 g_ptr_array_free(t
->control_tracefiles
, TRUE
);
495 //free per_cpu_tracefiles
496 for(i
=0;i
<t
->per_cpu_tracefile_number
;i
++){
497 tf
= (LttTracefile
*)g_ptr_array_index(t
->per_cpu_tracefiles
,i
);
498 ltt_tracefile_close(tf
);
500 g_ptr_array_free(t
->per_cpu_tracefiles
, TRUE
);
503 for(i
=0;i
<t
->facility_number
;i
++){
504 f
= (LttFacility
*)g_ptr_array_index(t
->facilities
,i
);
505 ltt_facility_close(f
);
507 g_ptr_array_free(t
->facilities
, TRUE
);
515 /*****************************************************************************
516 *Get the system description of the trace
517 ****************************************************************************/
519 LttSystemDescription
*ltt_trace_system_description(LttTrace
*t
)
521 return t
->system_description
;
524 /*****************************************************************************
525 * The following functions discover the facilities of the trace
526 ****************************************************************************/
528 unsigned ltt_trace_facility_number(LttTrace
*t
)
530 return (unsigned)(t
->facility_number
);
533 LttFacility
*ltt_trace_facility_get(LttTrace
*t
, unsigned i
)
535 return (LttFacility
*)g_ptr_array_index(t
->facilities
, i
);
538 /*****************************************************************************
540 * ltt_trace_facility_find : find facilities in the trace
543 * name : facility name
545 * position : position of the facility in the trace
547 * : the number of facilities
548 ****************************************************************************/
550 unsigned ltt_trace_facility_find(LttTrace
*t
, char *name
, unsigned *position
)
554 for(i
=0;i
=t
->facility_number
;i
++){
555 f
= (LttFacility
*)g_ptr_array_index(t
->facilities
, i
);
556 if(strcmp(f
->name
,name
)==0){
558 if(count
==1) *position
= i
;
566 /*****************************************************************************
567 * Functions to discover all the event types in the trace
568 ****************************************************************************/
570 unsigned ltt_trace_eventtype_number(LttTrace
*t
)
575 for(i
=0;i
=t
->facility_number
;i
++){
576 f
= (LttFacility
*)g_ptr_array_index(t
->facilities
, i
);
577 count
+= f
->event_number
;
582 LttFacility
* ltt_trace_facility_by_id(LttTrace
* trace
, unsigned id
)
584 LttFacility
* facility
;
586 for(i
=0;i
<trace
->facility_number
;i
++){
587 facility
= (LttFacility
*) g_ptr_array_index(trace
->facilities
,i
);
588 if(id
>= facility
->base_id
&&
589 id
< facility
->base_id
+ facility
->event_number
)
592 if(i
==trace
->facility_number
) return NULL
;
593 else return facility
;
596 LttEventType
*ltt_trace_eventtype_get(LttTrace
*t
, unsigned evId
)
599 f
= ltt_trace_facility_by_id(t
,evId
);
601 return f
->events
[evId
- f
->base_id
];
604 /*****************************************************************************
605 *There is one "per cpu" tracefile for each CPU, numbered from 0 to
606 *the maximum number of CPU in the system. When the number of CPU installed
607 *is less than the maximum, some positions are unused. There are also a
608 *number of "control" tracefiles (facilities, interrupts...).
609 ****************************************************************************/
610 unsigned ltt_trace_control_tracefile_number(LttTrace
*t
)
612 return t
->control_tracefile_number
;
615 unsigned ltt_trace_per_cpu_tracefile_number(LttTrace
*t
)
617 return t
->per_cpu_tracefile_number
;
620 /*****************************************************************************
621 *It is possible to search for the tracefiles by name or by CPU position.
622 *The index within the tracefiles of the same type is returned if found
623 *and a negative value otherwise.
624 ****************************************************************************/
626 int ltt_trace_control_tracefile_find(LttTrace
*t
, char *name
)
628 LttTracefile
* tracefile
;
630 for(i
=0;i
<t
->control_tracefile_number
;i
++){
631 tracefile
= (LttTracefile
*)g_ptr_array_index(t
->control_tracefiles
, i
);
632 if(strcmp(tracefile
->name
, name
)==0)break;
634 if(i
== t
->control_tracefile_number
) return -1;
638 int ltt_trace_per_cpu_tracefile_find(LttTrace
*t
, unsigned i
)
640 LttTracefile
* tracefile
;
642 for(j
=0;j
<t
->per_cpu_tracefile_number
;j
++){
643 tracefile
= (LttTracefile
*)g_ptr_array_index(t
->per_cpu_tracefiles
, j
);
644 name
= atoi(tracefile
->name
);
645 if(name
== (int)i
)break;
647 if(j
== t
->per_cpu_tracefile_number
) return -1;
651 /*****************************************************************************
652 *Get a specific tracefile
653 ****************************************************************************/
655 LttTracefile
*ltt_trace_control_tracefile_get(LttTrace
*t
, unsigned i
)
657 return (LttTracefile
*)g_ptr_array_index(t
->per_cpu_tracefiles
, i
);
660 LttTracefile
*ltt_trace_per_cpu_tracefile_get(LttTrace
*t
, unsigned i
)
662 return (LttTracefile
*)g_ptr_array_index(t
->per_cpu_tracefiles
, i
);
665 /*****************************************************************************
666 *Get the name of a tracefile
667 ****************************************************************************/
669 char *ltt_tracefile_name(LttTracefile
*tf
)
674 /*****************************************************************************
676 * ltt_tracefile_seek_time: seek to the first event of the trace with time
677 * larger or equal to time
680 * time : criteria of the time
681 ****************************************************************************/
683 void ltt_tracefile_seek_time(LttTracefile
*t
, LttTime time
)
687 int headTime
= timecmp(&(t
->a_block_start
->time
), &time
);
688 int tailTime
= timecmp(&(t
->a_block_end
->time
), &time
);
691 if(headTime
< 0 && tailTime
> 0){
692 lttTime
= getEventTime(t
);
693 err
= timecmp(<tTime
, &time
);
695 if(t
->which_event
==2 || timecmp(&t
->prev_event_time
,&time
)<0){
699 return ltt_tracefile_seek_time(t
, time
);
703 ev
= ltt_tracefile_read(t
);
705 g_print("End of file\n");
709 lttTime
= getEventTime(t
);
710 err
= timecmp(<tTime
, &time
);
714 }else if(headTime
> 0){
715 if(t
->which_block
== 1){
718 if(timecmp(&(t
->prev_block_end_time
),&time
) >= 0 ){
719 err
=readBlock(t
,t
->which_block
-1);
720 if(err
) g_error("Can not read tracefile: %s\n", t
->name
);
721 return ltt_tracefile_seek_time(t
, time
) ;
726 }else if(tailTime
< 0){
727 if(t
->which_block
!= t
->block_number
){
728 err
=readBlock(t
,t
->which_block
+1);
729 if(err
) g_error("Can not read tracefile: %s\n", t
->name
);
731 g_print("End of file\n");
734 if(tailTime
< 0) return ltt_tracefile_seek_time(t
, time
);
735 }else if(headTime
== 0){
737 }else if(tailTime
== 0){
738 t
->cur_event_pos
= t
->a_block_end
- EVENT_HEADER_SIZE
;
739 t
->current_event_time
= time
;
740 t
->cur_heart_beat_number
= 0;
741 t
->prev_event_time
.tv_sec
= 0;
742 t
->prev_event_time
.tv_nsec
= 0;
747 /*****************************************************************************
749 * ltt_tracefile_read : read the current event, set the pointer to the next
753 * LttEvent * : an event to be processed
754 ****************************************************************************/
756 LttEvent
*ltt_tracefile_read(LttTracefile
*t
)
758 LttEvent
* lttEvent
= (LttEvent
*)g_new(LttEvent
, 1);
761 lttEvent
->event_id
= (int)(*(uint16_t *)(t
->cur_event_pos
));
762 if(lttEvent
->event_id
== TRACE_TIME_HEARTBEAT
)
763 t
->cur_heart_beat_number
++;
765 t
->prev_event_time
= t
->current_event_time
;
766 // t->current_event_time = getEventTime(t);
768 lttEvent
->time_delta
= *(uint32_t*)(t
->cur_event_pos
+ EVENT_ID_SIZE
);
769 lttEvent
->event_time
= t
->current_event_time
;
771 lttEvent
->event_cycle_count
= ((uint64_t)1)<<32 * t
->cur_heart_beat_number
772 + lttEvent
->time_delta
;
774 lttEvent
->tracefile
= t
;
775 lttEvent
->data
= t
->cur_event_pos
+ EVENT_HEADER_SIZE
;
776 lttEvent
->which_block
= t
->which_block
;
777 lttEvent
->which_event
= t
->which_event
;
779 //update the fields of the current event and go to the next event
785 if(err
== ENOENT
) return lttEvent
;
786 if(err
== ERANGE
) g_error("event id is out of range\n");
787 if(err
)g_error("Can not read tracefile\n");
792 /****************************************************************************
794 * readFile : wrap function to read from a file
796 * fd : file descriptor
797 * buf : buf to contain the content
798 * size : number of bytes to be read
799 * mesg : message to be printed if some thing goes wrong
802 * EIO : can not read from the file
803 ****************************************************************************/
805 int readFile(int fd
, void * buf
, size_t size
, char * mesg
)
808 nbBytes
= read(fd
, buf
, size
);
816 /****************************************************************************
818 * readBlock : read a block from the file
820 * lttdes : ltt trace file
821 * whichBlock : the block which will be read
824 * EINVAL : lseek fail
825 * EIO : can not read from the file
826 ****************************************************************************/
828 int readBlock(LttTracefile
* tf
, int whichBlock
)
833 if(whichBlock
- tf
->which_block
== 1 && tf
->which_block
!= 0){
834 tf
->prev_block_end_time
= tf
->a_block_end
->time
;
835 tf
->prev_event_time
= tf
->a_block_end
->time
;
837 tf
->prev_block_end_time
.tv_sec
= 0;
838 tf
->prev_block_end_time
.tv_nsec
= 0;
839 tf
->prev_event_time
.tv_sec
= 0;
840 tf
->prev_event_time
.tv_nsec
= 0;
843 nbBytes
=lseek(tf
->fd
,(off_t
)((whichBlock
-1)*tf
->block_size
), SEEK_SET
);
844 if(nbBytes
== -1) return EINVAL
;
846 if(readFile(tf
->fd
,tf
->buffer
,tf
->block_size
,"Unable to read a block"))
849 tf
->a_block_start
=(BlockStart
*) (tf
->buffer
+ EVENT_HEADER_SIZE
);
850 lostSize
= *(uint32_t*)(tf
->buffer
+ tf
->block_size
- sizeof(uint32_t));
851 tf
->a_block_end
=(BlockEnd
*)(tf
->buffer
+ tf
->block_size
-
852 lostSize
+ EVENT_HEADER_SIZE
);
854 tf
->which_block
= whichBlock
;
856 tf
->cur_event_pos
= tf
->buffer
;//the beginning of the block, block start ev
857 tf
->cur_heart_beat_number
= 0;
861 tf
->current_event_time
= getEventTime(tf
);
866 /*****************************************************************************
868 * updateTracefile : reinitialize the info of the block which is already
872 ****************************************************************************/
874 void updateTracefile(LttTracefile
* tf
)
877 tf
->cur_event_pos
= tf
->buffer
;
878 tf
->current_event_time
= getEventTime(tf
);
879 tf
->cur_heart_beat_number
= 0;
881 tf
->prev_event_time
.tv_sec
= 0;
882 tf
->prev_event_time
.tv_nsec
= 0;
885 /*****************************************************************************
887 * skipEvent : go to the next event, update the fields of the current event
892 * EINVAL : lseek fail
893 * EIO : can not read from the file
894 * ENOMEM : end of file
895 * ENOENT : last event
896 * ERANGE : event id is out of range
897 ****************************************************************************/
899 int skipEvent(LttTracefile
* t
)
905 static int evCount
= 0;
908 if(t
->which_block
== t
->block_number
&&
909 evCount
== t
->which_event
){
914 evId
= (int)(*(uint16_t *)(t
->cur_event_pos
));
915 evData
= t
->cur_event_pos
+ EVENT_HEADER_SIZE
;
917 evT
= ltt_trace_eventtype_get(t
->trace
,(unsigned)evId
);
919 if(evT
) rootFld
= evT
->root_field
;
923 //event has string/sequence or the last event is not the same event
924 if((evT
->latest_block
!=t
->which_block
|| evT
->latest_event
!=t
->which_event
)
925 && rootFld
->field_fixed
== 0){
926 setFieldsOffset(t
, evT
, evData
, t
->trace
);
928 t
->cur_event_pos
+= EVENT_HEADER_SIZE
+ rootFld
->field_size
;
929 }else t
->cur_event_pos
+= EVENT_HEADER_SIZE
;
931 evT
->latest_block
= t
->which_block
;
932 evT
->latest_event
= t
->which_event
;
934 //the next event is in the next block
935 if(evId
== TRACE_BLOCK_END
){
936 if(t
->which_block
== t
->block_number
){
938 evCount
= t
->which_event
;
941 err
= readBlock(t
, t
->which_block
+ 1);
945 t
->current_event_time
= getEventTime(t
);
951 /*****************************************************************************
953 * getCyclePerNsec : calculate cycles per nsec for current block
956 ****************************************************************************/
958 void getCyclePerNsec(LttTracefile
* t
)
960 LttTime lBufTotalTime
; /* Total time for this buffer */
961 LttCycleCount lBufTotalNSec
; /* Total time for this buffer in nsecs */
962 LttCycleCount lBufTotalCycle
;/* Total cycles for this buffer */
964 /* Calculate the total time for this buffer */
965 TimeSub(lBufTotalTime
,t
->a_block_end
->time
, t
->a_block_start
->time
);
967 /* Calculate the total cycles for this bufffer */
968 lBufTotalCycle
= t
->a_block_end
->cycle_count
969 - t
->a_block_start
->cycle_count
;
971 /* Convert the total time to nsecs */
972 lBufTotalNSec
= lBufTotalTime
.tv_sec
* 1000000000 + lBufTotalTime
.tv_nsec
;
974 t
->cycle_per_nsec
= (double)lBufTotalCycle
/ (double)lBufTotalNSec
;
977 /****************************************************************************
979 * getEventTime : obtain the time of an event
983 * LttTime : the time of the event
984 ****************************************************************************/
986 LttTime
getEventTime(LttTracefile
* tf
)
989 LttCycleCount cycle_count
; // cycle count for the current event
990 LttCycleCount lEventTotalCycle
; // Total cycles from start for event
991 double lEventNSec
; // Total usecs from start for event
992 LttTime lTimeOffset
; // Time offset in struct LttTime
995 evId
= *(uint16_t*)tf
->cur_event_pos
;
996 if(evId
== TRACE_BLOCK_START
)
997 return tf
->a_block_start
->time
;
998 else if(evId
== TRACE_BLOCK_END
)
999 return tf
->a_block_end
->time
;
1002 // Calculate total time in cycles from start of buffer for this event
1003 cycle_count
= (LttCycleCount
)*(uint32_t*)(tf
->cur_event_pos
+ EVENT_ID_SIZE
);
1004 if(tf
->cur_heart_beat_number
)
1005 cycle_count
+= ((uint64_t)1)<<32 * tf
->cur_heart_beat_number
;
1006 lEventTotalCycle
= cycle_count
- tf
->a_block_start
->cycle_count
;
1008 // Convert it to nsecs
1009 lEventNSec
= lEventTotalCycle
/ tf
->cycle_per_nsec
;
1011 // Determine offset in struct LttTime
1012 lTimeOffset
.tv_nsec
= (long)lEventNSec
% 1000000000;
1013 lTimeOffset
.tv_sec
= (long)lEventNSec
/ 1000000000;
1015 TimeAdd(time
, tf
->a_block_start
->time
, lTimeOffset
);
1020 /*****************************************************************************
1022 * setFieldsOffset : set offset of the fields
1024 * tracefile : opened trace file
1025 * evT : the event type
1026 * evD : event data, it may be NULL
1027 ****************************************************************************/
1029 void setFieldsOffset(LttTracefile
*tf
,LttEventType
*evT
,void *evD
,LttTrace
* t
)
1031 LttField
* rootFld
= evT
->root_field
;
1032 // rootFld->base_address = evD;
1035 rootFld
->field_size
= getFieldtypeSize(tf
, evT
, 0,0,rootFld
, evD
,t
);
1038 /*****************************************************************************
1040 * getFieldtypeSize: get the size of the field type (primitive type)
1042 * tracefile : opened trace file
1044 * offsetRoot : offset from the root
1045 * offsetParent : offset from the parrent
1047 * evD : event data, it may be NULL
1049 * int : size of the field
1050 ****************************************************************************/
1052 int getFieldtypeSize(LttTracefile
* t
, LttEventType
* evT
, int offsetRoot
,
1053 int offsetParent
, LttField
* fld
, void *evD
, LttTrace
*trace
)
1055 int size
, size1
, element_number
, i
, offset1
, offset2
;
1056 LttType
* type
= fld
->field_type
;
1059 if(evT
->latest_block
==t
->which_block
&& evT
->latest_event
==t
->which_event
){
1060 return fld
->field_size
;
1064 if(fld
->field_fixed
== 1){
1065 if(fld
== evT
->root_field
) return fld
->field_size
;
1068 if(type
->type_class
!= LTT_STRUCT
&& type
->type_class
!= LTT_ARRAY
&&
1069 type
->type_class
!= LTT_SEQUENCE
&& type
->type_class
!= LTT_STRING
){
1070 if(fld
->field_fixed
== -1){
1071 size
= (int) ltt_type_size(trace
, type
);
1072 fld
->field_fixed
= 1;
1073 }else size
= fld
->field_size
;
1075 }else if(type
->type_class
== LTT_ARRAY
){
1076 element_number
= (int) type
->element_number
;
1077 if(fld
->field_fixed
== -1){
1078 size
= getFieldtypeSize(t
, evT
, offsetRoot
,0,fld
->child
[0], NULL
, trace
);
1079 if(size
== 0){ //has string or sequence
1080 fld
->field_fixed
= 0;
1082 fld
->field_fixed
= 1;
1083 size
*= element_number
;
1085 }else if(fld
->field_fixed
== 0){// has string or sequence
1087 for(i
=0;i
<element_number
;i
++){
1088 size
+= getFieldtypeSize(t
, evT
, offsetRoot
+size
,size
,
1089 fld
->child
[0], evD
+size
, trace
);
1091 }else size
= fld
->field_size
;
1093 }else if(type
->type_class
== LTT_SEQUENCE
){
1094 size1
= (int) ltt_type_size(trace
, type
);
1095 if(fld
->field_fixed
== -1){
1096 fld
->sequ_number_size
= size1
;
1097 fld
->field_fixed
= 0;
1098 size
= getFieldtypeSize(t
, evT
, offsetRoot
,0,fld
->child
[0], NULL
, trace
);
1099 fld
->element_size
= size
;
1101 element_number
= getIntNumber(size1
,evD
);
1102 type
->element_number
= element_number
;
1103 if(fld
->element_size
> 0){
1104 size
= element_number
* fld
->element_size
;
1105 }else{//sequence has string or sequence
1107 for(i
=0;i
<element_number
;i
++){
1108 size
+= getFieldtypeSize(t
, evT
, offsetRoot
+size
+size1
,size
+size1
,
1109 fld
->child
[0], evD
+size
+size1
, trace
);
1115 }else if(type
->type_class
== LTT_STRING
){
1117 if(fld
->field_fixed
== -1){
1118 fld
->field_fixed
= 0;
1120 size
= strlen((char*)evD
) + 1; //include end : '\0'
1123 }else if(type
->type_class
== LTT_STRUCT
){
1124 element_number
= (int) type
->element_number
;
1126 if(fld
->field_fixed
== -1){
1127 offset1
= offsetRoot
;
1129 for(i
=0;i
<element_number
;i
++){
1130 size1
=getFieldtypeSize(t
, evT
,offset1
,offset2
, fld
->child
[i
], NULL
, trace
);
1131 if(size1
> 0 && size
>= 0){
1133 if(offset1
>= 0) offset1
+= size1
;
1142 fld
->field_fixed
= 0;
1144 }else fld
->field_fixed
= 1;
1145 }else if(fld
->field_fixed
== 0){
1146 offset1
= offsetRoot
;
1148 for(i
=0;i
<element_number
;i
++){
1149 size
=getFieldtypeSize(t
,evT
,offset1
,offset2
,fld
->child
[i
],evD
+offset2
, trace
);
1154 }else size
= fld
->field_size
;
1157 fld
->offset_root
= offsetRoot
;
1158 fld
->offset_parent
= offsetParent
;
1160 fld
->fixed_root
= (offsetRoot
==-1) ? 0 : 1;
1161 fld
->fixed_parent
= (offsetParent
==-1) ? 0 : 1;
1163 fld
->field_size
= size
;
1168 /*****************************************************************************
1170 * timecmp : compare two time
1175 * int : 0: t1 == t2; -1: t1 < t2; 1: t1 > t2
1176 ****************************************************************************/
1178 int timecmp(LttTime
* t1
, LttTime
* t2
)
1181 TimeSub(T
, *t1
, *t2
);
1182 if(T
.tv_sec
== 0 && T
.tv_nsec
== 0) return 0;
1183 else if(T
.tv_sec
> 0 || (T
.tv_sec
==0 && T
.tv_nsec
> 0)) return 1;
1187 /*****************************************************************************
1189 * getIntNumber : get an integer number
1191 * size : the size of the integer
1192 * evD : the event data
1195 ****************************************************************************/
1197 int getIntNumber(int size
, void *evD
)
1200 if(size
== 1) i
= *(int8_t *)evD
;
1201 else if(size
== 2) i
= *(int16_t *)evD
;
1202 else if(size
== 4) i
= *(int32_t *)evD
;
1203 else if(size
== 8) i
= *(int64_t *)evD
;
1208 /*****************************************************************************
1210 * getDataEndianType : get the data type size and endian type of the local
1213 * size : size of data type
1214 * endian : endian type, little or big
1215 ****************************************************************************/
1217 void getDataEndianType(LttArchSize
* size
, LttArchEndian
* endian
)
1221 int sizeInt
=sizeof(int), sizeLong
=sizeof(long), sizePointer
=sizeof(void *);
1223 if(c
== 1) *endian
= LTT_LITTLE_ENDIAN
;
1224 else *endian
= LTT_BIG_ENDIAN
;
1226 if(sizeInt
== 2 && sizeLong
== 4 && sizePointer
== 4)
1228 else if(sizeInt
== 4 && sizeLong
== 4 && sizePointer
== 4)
1230 else if(sizeInt
== 4 && sizeLong
== 8 && sizePointer
== 8)
1232 else if(sizeInt
== 8 && sizeLong
== 8 && sizePointer
== 8)
1234 else *size
= LTT_UNKNOWN
;