1 /* This file is part of the Linux Trace Toolkit viewer
2 * Copyright (C) 2005 Mathieu Desnoyers
4 * Complete rewrite from the original version made by XangXiu Yang.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License Version 2 as
8 * published by the Free Software Foundation;
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
30 #include <sys/types.h>
45 #include "ltt-private.h"
46 #include <ltt/trace.h>
47 #include <ltt/facility.h>
48 #include <ltt/event.h>
50 #include <ltt/ltt-types.h>
53 /* Facility names used in this file */
55 GQuark LTT_FACILITY_NAME_HEARTBEAT
,
56 LTT_EVENT_NAME_HEARTBEAT
;
57 GQuark LTT_TRACEFILE_NAME_FACILITIES
;
64 #define __UNUSED__ __attribute__((__unused__))
66 #define g_info(format...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_INFO, format)
69 #define g_debug(format...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, format)
74 /* Those macros must be called from within a function where page_size is a known
76 #define PAGE_MASK (~(page_size-1))
77 #define PAGE_ALIGN(addr) (((addr)+page_size-1)&PAGE_MASK)
79 /* obtain the time of an event */
81 static inline LttTime
getEventTime(LttTracefile
* tf
);
84 /* set the offset of the fields belonging to the event,
85 need the information of the archecture */
86 void set_fields_offsets(LttTracefile
*tf
, LttEventType
*event_type
);
87 //size_t get_fields_offsets(LttTracefile *tf, LttEventType *event_type, void *data);
89 /* get the size of the field type according to
90 * The facility size information. */
91 static inline void preset_field_type_size(LttTracefile
*tf
,
92 LttEventType
*event_type
,
93 off_t offset_root
, off_t offset_parent
,
94 enum field_status
*fixed_root
, enum field_status
*fixed_parent
,
97 /* map a fixed size or a block information from the file (fd) */
98 static gint
map_block(LttTracefile
* tf
, guint block_num
);
100 /* calculate nsec per cycles for current block */
101 static double calc_nsecs_per_cycle(LttTracefile
* t
);
103 /* go to the next event */
104 static int ltt_seek_next_event(LttTracefile
*tf
);
106 void ltt_update_event_size(LttTracefile
*tf
);
109 /* Functions to parse system.xml file (using glib xml parser) */
110 static void parser_start_element (GMarkupParseContext __UNUSED__
*context
,
111 const gchar
*element_name
,
112 const gchar
**attribute_names
,
113 const gchar
**attribute_values
,
118 LttSystemDescription
* des
= (LttSystemDescription
* )user_data
;
119 if(strcmp("system", element_name
)){
120 *error
= g_error_new(G_MARKUP_ERROR
,
122 "This is not system.xml file");
126 while(attribute_names
[i
]){
127 if(strcmp("node_name", attribute_names
[i
])==0){
128 des
->node_name
= g_strdup(attribute_values
[i
]);
129 }else if(strcmp("domainname", attribute_names
[i
])==0){
130 des
->domain_name
= g_strdup(attribute_values
[i
]);
131 }else if(strcmp("cpu", attribute_names
[i
])==0){
132 des
->nb_cpu
= atoi(attribute_values
[i
]);
133 }else if(strcmp("arch_size", attribute_names
[i
])==0){
134 if(strcmp(attribute_values
[i
],"LP32") == 0) des
->size
= LTT_LP32
;
135 else if(strcmp(attribute_values
[i
],"ILP32") == 0) des
->size
= LTT_ILP32
;
136 else if(strcmp(attribute_values
[i
],"LP64") == 0) des
->size
= LTT_LP64
;
137 else if(strcmp(attribute_values
[i
],"ILP64") == 0) des
->size
= LTT_ILP64
;
138 else if(strcmp(attribute_values
[i
],"UNKNOWN") == 0) des
->size
= LTT_UNKNOWN
;
139 }else if(strcmp("endian", attribute_names
[i
])==0){
140 if(strcmp(attribute_values
[i
],"LITTLE_ENDIAN") == 0)
141 des
->endian
= LTT_LITTLE_ENDIAN
;
142 else if(strcmp(attribute_values
[i
],"BIG_ENDIAN") == 0)
143 des
->endian
= LTT_BIG_ENDIAN
;
144 }else if(strcmp("kernel_name", attribute_names
[i
])==0){
145 des
->kernel_name
= g_strdup(attribute_values
[i
]);
146 }else if(strcmp("kernel_release", attribute_names
[i
])==0){
147 des
->kernel_release
= g_strdup(attribute_values
[i
]);
148 }else if(strcmp("kernel_version", attribute_names
[i
])==0){
149 des
->kernel_version
= g_strdup(attribute_values
[i
]);
150 }else if(strcmp("machine", attribute_names
[i
])==0){
151 des
->machine
= g_strdup(attribute_values
[i
]);
152 }else if(strcmp("processor", attribute_names
[i
])==0){
153 des
->processor
= g_strdup(attribute_values
[i
]);
154 }else if(strcmp("hardware_platform", attribute_names
[i
])==0){
155 des
->hardware_platform
= g_strdup(attribute_values
[i
]);
156 }else if(strcmp("operating_system", attribute_names
[i
])==0){
157 des
->operating_system
= g_strdup(attribute_values
[i
]);
158 }else if(strcmp("ltt_major_version", attribute_names
[i
])==0){
159 des
->ltt_major_version
= atoi(attribute_values
[i
]);
160 }else if(strcmp("ltt_minor_version", attribute_names
[i
])==0){
161 des
->ltt_minor_version
= atoi(attribute_values
[i
]);
162 }else if(strcmp("ltt_block_size", attribute_names
[i
])==0){
163 des
->ltt_block_size
= atoi(attribute_values
[i
]);
165 *error
= g_error_new(G_MARKUP_ERROR
,
167 "Not a valid attribute");
174 static void parser_characters (GMarkupParseContext __UNUSED__
*context
,
176 gsize __UNUSED__ text_len
,
178 GError __UNUSED__
**error
)
180 LttSystemDescription
* des
= (LttSystemDescription
* )user_data
;
181 des
->description
= g_strdup(text
);
184 LttFacility
*ltt_trace_get_facility_by_num(LttTrace
*t
,
187 g_assert(num
< t
->facilities_by_num
->len
);
189 return &g_array_index(t
->facilities_by_num
, LttFacility
, num
);
194 /*****************************************************************************
196 * ltt_tracefile_open : open a trace file, construct a LttTracefile
198 * t : the trace containing the tracefile
199 * fileName : path name of the trace file
200 * tf : the tracefile structure
202 * : 0 for success, -1 otherwise.
203 ****************************************************************************/
205 gint
ltt_tracefile_open(LttTrace
*t
, gchar
* fileName
, LttTracefile
*tf
)
207 struct stat lTDFStat
; /* Trace data file status */
208 struct ltt_block_start_header
*header
;
209 int page_size
= getpagesize();
212 tf
->long_name
= g_quark_from_string(fileName
);
214 tf
->fd
= open(fileName
, O_RDONLY
);
216 g_warning("Unable to open input data file %s\n", fileName
);
220 // Get the file's status
221 if(fstat(tf
->fd
, &lTDFStat
) < 0){
222 g_warning("Unable to get the status of the input data file %s\n", fileName
);
226 // Is the file large enough to contain a trace
227 if(lTDFStat
.st_size
< (off_t
)(sizeof(struct ltt_block_start_header
))){
228 g_print("The input data file %s does not contain a trace\n", fileName
);
232 /* Temporarily map the buffer start header to get trace information */
233 /* Multiple of pages aligned head */
234 tf
->buffer
.head
= mmap(0,
235 PAGE_ALIGN(sizeof(struct ltt_block_start_header
)), PROT_READ
,
236 MAP_PRIVATE
, tf
->fd
, 0);
237 if(tf
->buffer
.head
== MAP_FAILED
) {
238 perror("Error in allocating memory for buffer of tracefile");
241 g_assert( ( (guint
)tf
->buffer
.head
&(8-1) ) == 0); // make sure it's aligned.
243 header
= (struct ltt_block_start_header
*)tf
->buffer
.head
;
245 if(header
->trace
.magic_number
== LTT_MAGIC_NUMBER
)
247 else if(header
->trace
.magic_number
== LTT_REV_MAGIC_NUMBER
)
249 else /* invalid magic number, bad tracefile ! */
252 //store the size of the file
253 tf
->file_size
= lTDFStat
.st_size
;
254 tf
->block_size
= ltt_get_uint32(LTT_GET_BO(tf
), &header
->buf_size
);
255 tf
->num_blocks
= tf
->file_size
/ tf
->block_size
;
257 munmap(tf
->buffer
.head
, PAGE_ALIGN(sizeof(struct ltt_block_start_header
)));
258 tf
->buffer
.head
= NULL
;
260 //read the first block
261 if(map_block(tf
,0)) {
262 perror("Cannot map block for tracefile");
270 munmap(tf
->buffer
.head
, PAGE_ALIGN(sizeof(struct ltt_block_start_header
)));
277 LttTrace
*ltt_tracefile_get_trace(LttTracefile
*tf
)
283 /*****************************************************************************
284 *Open control and per cpu tracefiles
285 ****************************************************************************/
287 void ltt_tracefile_open_cpu(LttTrace
*t
, gchar
* tracefile_name
)
290 tf
= ltt_tracefile_open(t
,tracefile_name
);
292 t
->per_cpu_tracefile_number
++;
293 g_ptr_array_add(t
->per_cpu_tracefiles
, tf
);
296 gint
ltt_tracefile_open_control(LttTrace
*t
, gchar
* control_name
)
305 tf
= ltt_tracefile_open(t
,control_name
);
307 g_warning("ltt_tracefile_open_control : bad file descriptor");
310 t
->control_tracefile_number
++;
311 g_ptr_array_add(t
->control_tracefiles
,tf
);
313 //parse facilities tracefile to get base_id
314 if(strcmp(&control_name
[strlen(control_name
)-10],"facilities") ==0){
316 if(!ltt_tracefile_read(tf
,&ev
)) return 0; // end of file
318 if(ev
.event_id
== TRACE_FACILITY_LOAD
){
320 fLoad
.name
= (gchar
*)pos
;
321 fLoad
.checksum
= *(LttChecksum
*)(pos
+ strlen(fLoad
.name
));
322 fLoad
.base_code
= *(guint32
*)(pos
+ strlen(fLoad
.name
) + sizeof(LttChecksum
));
324 for(i
=0;i
<t
->facility_number
;i
++){
325 f
= (LttFacility
*)g_ptr_array_index(t
->facilities
,i
);
326 if(strcmp(f
->name
,fLoad
.name
)==0 && fLoad
.checksum
==f
->checksum
){
327 f
->base_id
= fLoad
.base_code
;
331 if(i
==t
->facility_number
) {
332 g_warning("Facility: %s, checksum: %u is not found",
333 fLoad
.name
,(unsigned int)fLoad
.checksum
);
336 }else if(ev
.event_id
== TRACE_BLOCK_START
){
338 }else if(ev
.event_id
== TRACE_BLOCK_END
){
341 g_warning("Not valid facilities trace file");
350 /*****************************************************************************
352 * ltt_tracefile_close: close a trace file,
354 * t : tracefile which will be closed
355 ****************************************************************************/
357 void ltt_tracefile_close(LttTracefile
*t
)
359 if(t
->buffer
.head
!= NULL
)
360 munmap(t
->buffer
.head
, t
->buf_size
);
365 /*****************************************************************************
366 *Get system information
367 ****************************************************************************/
369 gint
getSystemInfo(LttSystemDescription
* des
, gchar
* pathname
)
376 GMarkupParseContext
* context
;
377 GError
* error
= NULL
;
378 GMarkupParser markup_parser
=
380 parser_start_element
,
383 NULL
, /* passthrough */
387 fd
= g_open(pathname
, O_RDONLY
, 0);
389 g_warning("Can not open file : %s\n", pathname
);
393 iochan
= g_io_channel_unix_new(fd
);
395 context
= g_markup_parse_context_new(&markup_parser
, 0, des
,NULL
);
397 //while(fgets(buf,DIR_NAME_SIZE, fp) != NULL){
398 while(g_io_channel_read_line(iochan
, &buf
, &length
, NULL
, &error
)
399 != G_IO_STATUS_EOF
) {
402 g_warning("Can not read xml file: \n%s\n", error
->message
);
405 if(!g_markup_parse_context_parse(context
, buf
, length
, &error
)){
407 g_warning("Can not parse xml file: \n%s\n", error
->message
);
410 g_markup_parse_context_free(context
);
412 g_io_channel_shutdown(iochan
, FALSE
, &error
); /* No flush */
414 g_warning("Can not close file: \n%s\n", error
->message
);
422 g_markup_parse_context_free(context
);
424 g_io_channel_shutdown(iochan
, FALSE
, &error
); /* No flush */
426 g_warning("Can not close file: \n%s\n", error
->message
);
437 /*****************************************************************************
438 *The following functions get facility/tracefile information
439 ****************************************************************************/
441 gint
getFacilityInfo(LttTrace
*t
, gchar
* eventdefs
)
448 gchar fullname
[DIR_NAME_SIZE
];
449 GError
* error
= NULL
;
451 dir
= g_dir_open(eventdefs
, 0, &error
);
454 g_warning("Can not open directory: %s, %s\n", eventdefs
, error
->message
);
459 while((name
= g_dir_read_name(dir
)) != NULL
){
460 if(!g_pattern_match_simple("*.xml", name
)) continue;
461 strcpy(fullname
,eventdefs
);
462 strcat(fullname
,name
);
463 ltt_facility_open(t
,fullname
);
467 for(j
=0;j
<t
->facility_number
;j
++){
468 f
= (LttFacility
*)g_ptr_array_index(t
->facilities
, j
);
469 for(i
=0; i
<f
->event_number
; i
++){
471 setFieldsOffset(NULL
, et
, NULL
, t
);
478 /*****************************************************************************
479 *A trace is specified as a pathname to the directory containing all the
480 *associated data (control tracefiles, per cpu tracefiles, event
483 *When a trace is closed, all the associated facilities, types and fields
484 *are released as well.
488 /****************************************************************************
489 * get_absolute_pathname
491 * return the unique pathname in the system
493 * MD : Fixed this function so it uses realpath, dealing well with
494 * forgotten cases (.. were not used correctly before).
496 ****************************************************************************/
497 void get_absolute_pathname(const gchar
*pathname
, gchar
* abs_pathname
)
499 abs_pathname
[0] = '\0';
501 if ( realpath (pathname
, abs_pathname
) != NULL
)
505 /* error, return the original path unmodified */
506 strcpy(abs_pathname
, pathname
);
512 /* Search for something like : .*_.*
514 * The left side is the name, the right side is the number.
517 int get_tracefile_name_number(const gchar
*raw_name
,
521 guint raw_name_len
= strlen(raw_name
);
522 gchar char_name
[PATH_MAX
];
529 for(i
=raw_name_len
-1;i
>=0;i
--) {
530 if(raw_name
[i
] == '_') break;
532 if(i
==0) /* Either not found or name length is 0 */
536 cpu_num
= strtol(raw_name
+underscore_pos
+1, &endptr
, 10);
538 if(endptr
== raw_name
+underscore_pos
+1)
539 return -1; /* No digit */
540 if(cpu_num
== LONG_MIN
|| cpu_num
== LONG_MAX
)
541 return -1; /* underflow / overflow */
543 strncpy(char_name
, raw_name
, underscore_pos
);
545 *name
= g_quark_from_string(char_name
);
552 GData
**ltt_trace_get_tracefiles_groups(LttTrace
*trace
)
554 return &trace
->tracefiles
;
558 void compute_tracefile_group(GQuark key_id
,
560 struct compute_tracefile_group_args
*args
)
565 for(i
=0; i
<group
->len
; i
++) {
566 tf
= &g_array_index (group
, LttTracefile
, i
);
568 args
->func(tf
, args
->func_args
);
573 void ltt_tracefile_group_destroy(gpointer data
)
575 GArray
*group
= (GArray
*)data
;
579 for(i
=0; i
<group
->len
; i
++) {
580 tf
= &g_array_index (group
, LttTracefile
, i
);
582 ltt_tracefile_close(tf
);
584 g_array_free(group
, TRUE
);
587 gboolean
ltt_tracefile_group_has_cpu_online(gpointer data
)
589 GArray
*group
= (GArray
*)data
;
593 for(i
=0; i
<group
->len
; i
++) {
594 tf
= &g_array_index (group
, LttTracefile
, i
);
595 if(tf
->cpu_online
) return 1;
601 /* Open each tracefile under a specific directory. Put them in a
602 * GData : permits to access them using their tracefile group pathname.
603 * i.e. access control/modules tracefile group by index :
606 * relative path is the path relative to the trace root
607 * root path is the full path
609 * A tracefile group is simply an array where all the per cpu tracefiles sits.
612 static int open_tracefiles(LttTrace
*trace
, char *root_path
,
615 DIR *dir
= opendir(root_path
);
616 struct dirent
*entry
;
617 struct stat stat_buf
;
625 char rel_path
[PATH_MAX
];
634 strncpy(path
, root_path
, PATH_MAX
-1);
635 path_len
= strlen(path
);
636 path
[path_len
] = '/';
638 path_ptr
= path
+ path_len
;
640 strncpy(rel_path
, relative_path
, PATH_MAX
-1);
641 rel_path_len
= strlen(rel_path
);
642 rel_path
[rel_path_len
] = '/';
644 rel_path_ptr
= rel_path
+ rel_path_len
;
646 while((entry
= readdir(dir
)) != NULL
) {
648 if(entry
->d_name
[0] == '.') continue;
650 strncpy(path_ptr
, entry
->d_name
, PATH_MAX
- path_len
);
651 strncpy(rel_path_ptr
, entry
->d_name
, PATH_MAX
- rel_path_len
);
653 ret
= stat(path
, &stat_buf
);
659 g_debug("Tracefile file or directory : %s\n", path
);
661 if(S_ISDIR(stat_buf
.st_mode
)) {
663 g_debug("Entering subdirectory...\n");
664 ret
= open_tracefiles(trace
, path
, rel_path
);
665 if(ret
< 0) continue;
666 } else if(S_ISREG(stat_buf
.st_mode
)) {
673 if(get_tracefile_name_number(rel_path
, &name
, &num
))
674 continue; /* invalid name */
676 g_debug("Opening file.\n");
677 if(ltt_tracefile_open(trace
, path
, &tmp_tf
)) {
678 g_info("Error opening tracefile %s", path
);
680 continue; /* error opening the tracefile : bad magic number ? */
683 g_debug("Tracefile name is %s and number is %u",
684 g_quark_to_string(name
), num
);
686 tmp_tf
.cpu_online
= 1;
687 tmp_tf
.cpu_num
= num
;
690 group
= g_datalist_id_get_data(&trace
->tracefiles
, name
);
692 /* Elements are automatically cleared when the array is allocated.
693 * It makes the cpu_online variable set to 0 : cpu offline, by default.
695 group
= g_array_sized_new (FALSE
, TRUE
, sizeof(LttTracefile
), 10);
696 g_datalist_id_set_data_full(&trace
->tracefiles
, name
,
697 group
, ltt_tracefile_group_destroy
);
700 /* Add the per cpu tracefile to the named group */
701 unsigned int old_len
= group
->len
;
703 group
= g_array_set_size(group
, num
+1);
704 g_array_index (group
, LttTracefile
, num
) = tmp_tf
;
714 /* ltt_get_facility_description
716 * Opens the trace corresponding to the requested facility (identified by fac_id
719 * The name searched is : %trace root%/eventdefs/facname_checksum.xml
721 * Returns 0 on success, or 1 on failure.
724 static int ltt_get_facility_description(LttFacility
*f
,
726 LttTracefile
*fac_tf
)
728 char desc_file_name
[PATH_MAX
];
733 text
= g_quark_to_string(t
->pathname
);
734 textlen
= strlen(text
);
736 if(textlen
>= PATH_MAX
) goto name_error
;
737 strcpy(desc_file_name
, text
);
739 text
= "/eventdefs/";
740 textlen
+=strlen(text
);
741 if(textlen
>= PATH_MAX
) goto name_error
;
742 strcat(desc_file_name
, text
);
744 text
= g_quark_to_string(f
->name
);
745 textlen
+=strlen(text
);
746 if(textlen
>= PATH_MAX
) goto name_error
;
747 strcat(desc_file_name
, text
);
750 textlen
+=strlen(text
);
751 if(textlen
>= PATH_MAX
) goto name_error
;
752 strcat(desc_file_name
, text
);
754 err
= snprintf(desc_file_name
+textlen
, PATH_MAX
-textlen
-1,
756 if(err
< 0) goto name_error
;
758 textlen
=strlen(desc_file_name
);
761 textlen
+=strlen(text
);
762 if(textlen
>= PATH_MAX
) goto name_error
;
763 strcat(desc_file_name
, text
);
765 err
= ltt_facility_open(f
, t
, desc_file_name
);
766 if(err
) goto facility_error
;
775 static void ltt_fac_ids_destroy(gpointer data
)
777 GArray
*fac_ids
= (GArray
*)data
;
779 g_array_free(fac_ids
, TRUE
);
783 /* Presumes the tracefile is already seeked at the beginning. It makes sense,
784 * because it must be done just after the opening */
785 static int ltt_process_facility_tracefile(LttTracefile
*tf
)
794 err
= ltt_tracefile_read_seek(tf
);
795 if(err
== EPERM
) goto seek_error
;
796 else if(err
== ERANGE
) break; /* End of tracefile */
798 err
= ltt_tracefile_read_update_event(tf
);
799 if(err
) goto update_error
;
801 /* We are on a facility load/or facility unload/ or heartbeat event */
803 * * facility 0 is hardcoded : this is the core facility. It will be shown
804 * in the facility array though, and is shown as "loaded builtin" in the
806 * It contains event :
808 * 1 : facility unload
809 * 2 : state dump facility load
812 if(tf
->event
.facility_id
!= LTT_FACILITY_CORE
) {
813 /* Should only contain core facility */
814 g_warning("Error in processing facility file %s, "
815 "should not contain facility id %u.", g_quark_to_string(tf
->name
),
816 tf
->event
.facility_id
);
821 struct LttFacilityLoad
*fac_load_data
;
822 struct LttStateDumpFacilityLoad
*fac_state_dump_load_data
;
826 switch((enum ltt_core_events
)tf
->event
.event_id
) {
827 case LTT_EVENT_FACILITY_LOAD
:
828 fac_name
= (char*)(tf
->event
.data
);
829 g_debug("Doing LTT_EVENT_FACILITY_LOAD of facility %s",
832 (struct LttFacilityLoad
*)
833 (tf
->event
.data
+ strlen(fac_name
) + 1);
834 fac
= &g_array_index (tf
->trace
->facilities_by_num
, LttFacility
,
835 ltt_get_uint32(LTT_GET_BO(tf
), &fac_load_data
->id
));
836 g_assert(fac
->exists
== 0);
837 fac
->name
= g_quark_from_string(fac_name
);
838 fac
->checksum
= ltt_get_uint32(LTT_GET_BO(tf
),
839 &fac_load_data
->checksum
);
840 fac
->id
= ltt_get_uint32(LTT_GET_BO(tf
), &fac_load_data
->id
);
841 fac
->pointer_size
= ltt_get_uint32(LTT_GET_BO(tf
),
842 &fac_load_data
->pointer_size
);
843 fac
->long_size
= ltt_get_uint32(LTT_GET_BO(tf
),
844 &fac_load_data
->long_size
);
845 fac
->size_t_size
= ltt_get_uint32(LTT_GET_BO(tf
),
846 &fac_load_data
->size_t_size
);
847 fac
->alignment
= ltt_get_uint32(LTT_GET_BO(tf
),
848 &fac_load_data
->alignment
);
850 if(ltt_get_facility_description(fac
, tf
->trace
, tf
))
851 continue; /* error opening description */
853 fac
->trace
= tf
->trace
;
855 /* Preset the field offsets */
856 for(i
=0; i
<fac
->events
->len
; i
++){
857 et
= &g_array_index(fac
->events
, LttEventType
, i
);
858 set_fields_offsets(tf
, et
);
863 fac_ids
= g_datalist_id_get_data(&tf
->trace
->facilities_by_name
,
865 if(fac_ids
== NULL
) {
866 fac_ids
= g_array_sized_new (FALSE
, TRUE
, sizeof(guint
), 1);
867 g_datalist_id_set_data_full(&tf
->trace
->facilities_by_name
,
869 fac_ids
, ltt_fac_ids_destroy
);
871 g_array_append_val(fac_ids
, fac
->id
);
874 case LTT_EVENT_FACILITY_UNLOAD
:
875 g_debug("Doing LTT_EVENT_FACILITY_UNLOAD");
876 /* We don't care about unload : facilities ID are valid for the whole
877 * trace. They simply won't be used after the unload. */
879 case LTT_EVENT_STATE_DUMP_FACILITY_LOAD
:
880 fac_name
= (char*)(tf
->event
.data
);
881 g_debug("Doing LTT_EVENT_STATE_DUMP_FACILITY_LOAD of facility %s",
883 fac_state_dump_load_data
=
884 (struct LttStateDumpFacilityLoad
*)
885 (tf
->event
.data
+ strlen(fac_name
) + 1);
886 fac
= &g_array_index (tf
->trace
->facilities_by_num
, LttFacility
,
887 ltt_get_uint32(LTT_GET_BO(tf
), &fac_state_dump_load_data
->id
));
888 g_assert(fac
->exists
== 0);
889 fac
->name
= g_quark_from_string(fac_name
);
890 fac
->checksum
= ltt_get_uint32(LTT_GET_BO(tf
),
891 &fac_state_dump_load_data
->checksum
);
892 fac
->id
= fac_state_dump_load_data
->id
;
893 fac
->pointer_size
= ltt_get_uint32(LTT_GET_BO(tf
),
894 &fac_state_dump_load_data
->pointer_size
);
895 fac
->long_size
= ltt_get_uint32(LTT_GET_BO(tf
),
896 &fac_state_dump_load_data
->long_size
);
897 fac
->size_t_size
= ltt_get_uint32(LTT_GET_BO(tf
),
898 &fac_state_dump_load_data
->size_t_size
);
899 fac
->alignment
= ltt_get_uint32(LTT_GET_BO(tf
),
900 &fac_state_dump_load_data
->alignment
);
901 if(ltt_get_facility_description(fac
, tf
->trace
, tf
))
902 continue; /* error opening description */
904 fac
->trace
= tf
->trace
;
906 /* Preset the field offsets */
907 for(i
=0; i
<fac
->events
->len
; i
++){
908 et
= &g_array_index(fac
->events
, LttEventType
, i
);
909 set_fields_offsets(tf
, et
);
914 fac_ids
= g_datalist_id_get_data(&tf
->trace
->facilities_by_name
,
916 if(fac_ids
== NULL
) {
917 fac_ids
= g_array_sized_new (FALSE
, TRUE
, sizeof(guint
), 1);
918 g_datalist_id_set_data_full(&tf
->trace
->facilities_by_name
,
920 fac_ids
, ltt_fac_ids_destroy
);
922 g_array_append_val(fac_ids
, fac
->id
);
925 case LTT_EVENT_HEARTBEAT
:
928 g_warning("Error in processing facility file %s, "
929 "unknown event id %hhu in core facility.",
930 g_quark_to_string(tf
->name
),
945 g_warning("An error occured in facility tracefile parsing");
950 LttTrace
*ltt_trace_open(const gchar
*pathname
)
952 gchar abs_path
[PATH_MAX
];
957 struct ltt_block_start_header
*header
;
959 t
= g_new(LttTrace
, 1);
960 if(!t
) goto alloc_error
;
962 get_absolute_pathname(pathname
, abs_path
);
963 t
->pathname
= g_quark_from_string(abs_path
);
965 /* Open all the tracefiles */
966 g_datalist_init(&t
->tracefiles
);
967 if(open_tracefiles(t
, abs_path
, ""))
970 /* Prepare the facilities containers : array and mapping */
971 /* Array is zeroed : the "exists" field is set to false by default */
972 t
->facilities_by_num
= g_array_sized_new (FALSE
,
973 TRUE
, sizeof(LttFacility
),
975 t
->facilities_by_num
= g_array_set_size(t
->facilities_by_num
, NUM_FACILITIES
);
977 g_datalist_init(&t
->facilities_by_name
);
979 /* Parse each trace control/facilitiesN files : get runtime fac. info */
980 group
= g_datalist_id_get_data(&t
->tracefiles
, LTT_TRACEFILE_NAME_FACILITIES
);
982 g_error("Trace %s has no facility tracefile", abs_path
);
984 goto facilities_error
;
987 /* Get the trace information for the control/facility 0 tracefile */
988 g_assert(group
->len
> 0);
989 tf
= &g_array_index (group
, LttTracefile
, 0);
990 header
= (struct ltt_block_start_header
*)tf
->buffer
.head
;
991 t
->arch_type
= ltt_get_uint32(LTT_GET_BO(tf
), &header
->trace
.arch_type
);
992 t
->arch_variant
= ltt_get_uint32(LTT_GET_BO(tf
), &header
->trace
.arch_variant
);
993 t
->arch_size
= header
->trace
.arch_size
;
994 t
->ltt_major_version
= header
->trace
.major_version
;
995 t
->ltt_minor_version
= header
->trace
.minor_version
;
996 t
->flight_recorder
= header
->trace
.flight_recorder
;
997 t
->has_heartbeat
= header
->trace
.has_heartbeat
;
998 t
->has_alignment
= header
->trace
.has_alignment
;
999 t
->has_tsc
= header
->trace
.has_tsc
;
1002 for(i
=0; i
<group
->len
; i
++) {
1003 tf
= &g_array_index (group
, LttTracefile
, i
);
1004 if(ltt_process_facility_tracefile(tf
))
1005 goto facilities_error
;
1010 /* Error handling */
1012 g_datalist_clear(&t
->facilities_by_name
);
1013 g_array_free(t
->facilities_by_num
, TRUE
);
1015 g_datalist_clear(&t
->tracefiles
);
1022 GQuark
ltt_trace_name(LttTrace
*t
)
1028 /******************************************************************************
1029 * When we copy a trace, we want all the opening actions to happen again :
1030 * the trace will be reopened and totally independant from the original.
1031 * That's why we call ltt_trace_open.
1032 *****************************************************************************/
1033 LttTrace
*ltt_trace_copy(LttTrace
*self
)
1035 return ltt_trace_open(g_quark_to_string(self
->pathname
));
1038 void ltt_trace_close(LttTrace
*t
)
1043 for(i
=0; i
<t
->facilities_by_num
->len
; i
++) {
1044 fac
= &g_array_index (t
->facilities_by_num
, LttFacility
, i
);
1046 ltt_facility_close(fac
);
1049 g_datalist_clear(&t
->facilities_by_name
);
1050 g_array_free(t
->facilities_by_num
, TRUE
);
1051 g_datalist_clear(&t
->tracefiles
);
1056 /*****************************************************************************
1057 *Get the system description of the trace
1058 ****************************************************************************/
1060 LttFacility
*ltt_trace_facility_by_id(LttTrace
*t
, guint8 id
)
1062 g_assert(id
< t
->facilities_by_num
->len
);
1063 return &g_array_index(t
->facilities_by_num
, LttFacility
, id
);
1066 /* ltt_trace_facility_get_by_name
1068 * Returns the GArray of facility indexes. All the fac_ids that matches the
1069 * requested facility name.
1071 * If name is not found, returns NULL.
1073 GArray
*ltt_trace_facility_get_by_name(LttTrace
*t
, GQuark name
)
1075 return g_datalist_id_get_data(&t
->facilities_by_name
, name
);
1078 /*****************************************************************************
1079 * Functions to discover all the event types in the trace
1080 ****************************************************************************/
1083 unsigned ltt_trace_eventtype_number(LttTrace
*t
)
1087 unsigned int num
= t
->facility_number
;
1091 f
= (LttFacility
*)g_ptr_array_index(t
->facilities
, i
);
1092 count
+= f
->event_number
;
1099 //use an iteration on all the trace facilities, and inside iteration on all the
1100 //event types in each facilities instead.
1101 LttEventType
*ltt_trace_eventtype_get(LttTrace
*t
, unsigned evId
)
1103 LttEventType
*event_type
;
1106 f
= ltt_trace_facility_by_id(t
,evId
);
1108 if(unlikely(!f
)) event_type
= NULL
;
1109 else event_type
= f
->events
[evId
- f
->base_id
];
1116 /*****************************************************************************
1117 * ltt_trace_find_tracefile
1119 * Find a tracefile by name and index in the group.
1121 * Returns a pointer to the tracefiles, else NULL.
1122 ****************************************************************************/
1124 LttTracefile
*ltt_trace_find_tracefile(LttTrace
*t
, const gchar
*name
)
1129 /*****************************************************************************
1130 * Get the start time and end time of the trace
1131 ****************************************************************************/
1133 static void ltt_tracefile_time_span_get(LttTracefile
*tf
,
1134 LttTime
*start
, LttTime
*end
)
1136 struct ltt_block_start_header
* header
;
1139 err
= map_block(tf
, 0);
1141 g_error("Can not map block");
1142 *start
= ltt_time_infinite
;
1144 *start
= tf
->buffer
.begin
.timestamp
;
1146 err
= map_block(tf
, tf
->num_blocks
- 1); /* Last block */
1148 g_error("Can not map block");
1149 *end
= ltt_time_zero
;
1151 *end
= tf
->buffer
.end
.timestamp
;
1154 struct tracefile_time_span_get_args
{
1160 static void group_time_span_get(GQuark name
, gpointer data
, gpointer user_data
)
1162 struct tracefile_time_span_get_args
*args
=
1163 (struct tracefile_time_span_get_args
*)user_data
;
1165 GArray
*group
= (GArray
*)data
;
1171 for(i
=0; i
<group
->len
; i
++) {
1172 tf
= &g_array_index (group
, LttTracefile
, i
);
1173 if(tf
->cpu_online
) {
1174 ltt_tracefile_time_span_get(tf
, &tmp_start
, &tmp_end
);
1175 if(ltt_time_compare(*args
->start
, tmp_start
)>0) *args
->start
= tmp_start
;
1176 if(ltt_time_compare(*args
->end
, tmp_end
)<0) *args
->end
= tmp_end
;
1181 void ltt_trace_time_span_get(LttTrace
*t
, LttTime
*start
, LttTime
*end
)
1183 LttTime min_start
= ltt_time_infinite
;
1184 LttTime max_end
= ltt_time_zero
;
1185 struct tracefile_time_span_get_args args
= { t
, &min_start
, &max_end
};
1187 g_datalist_foreach(&t
->tracefiles
, &group_time_span_get
, &args
);
1189 if(start
!= NULL
) *start
= min_start
;
1190 if(end
!= NULL
) *end
= max_end
;
1195 /*****************************************************************************
1196 *Get the name of a tracefile
1197 ****************************************************************************/
1199 GQuark
ltt_tracefile_name(LttTracefile
*tf
)
1205 guint
ltt_tracefile_num(LttTracefile
*tf
)
1210 /*****************************************************************************
1211 * Get the number of blocks in the tracefile
1212 ****************************************************************************/
1214 guint
ltt_tracefile_block_number(LttTracefile
*tf
)
1216 return tf
->num_blocks
;
1220 /* Seek to the first event in a tracefile that has a time equal or greater than
1221 * the time passed in parameter.
1223 * If the time parameter is outside the tracefile time span, seek to the first
1224 * event or if after, return ERANGE.
1226 * If the time parameter is before the first event, we have to seek specially to
1229 * If the time is after the end of the trace, return ERANGE.
1231 * Do a binary search to find the right block, then a sequential search in the
1232 * block to find the event.
1234 * In the special case where the time requested fits inside a block that has no
1235 * event corresponding to the requested time, the first event of the next block
1238 * IMPORTANT NOTE : // FIXME everywhere...
1240 * You MUST NOT do a ltt_tracefile_read right after a ltt_tracefile_seek_time :
1241 * you will jump over an event if you do.
1243 * Return value : 0 : no error, the tf->event can be used
1244 * ERANGE : time if after the last event of the trace
1245 * otherwise : this is an error.
1249 int ltt_tracefile_seek_time(LttTracefile
*tf
, LttTime time
)
1253 unsigned int block_num
, high
, low
;
1255 /* seek at the beginning of trace */
1256 err
= map_block(tf
, 0); /* First block */
1258 g_error("Can not map block");
1262 /* If the time is lower or equal the beginning of the trace,
1263 * go to the first event. */
1264 if(ltt_time_compare(time
, tf
->buffer
.begin
.timestamp
) <= 0) {
1265 ret
= ltt_tracefile_read(tf
);
1266 if(ret
== ERANGE
) goto range
;
1267 else if (ret
) goto fail
;
1268 goto found
; /* There is either no event in the trace or the event points
1269 to the first event in the trace */
1272 err
= map_block(tf
, tf
->num_blocks
- 1); /* Last block */
1274 g_error("Can not map block");
1278 /* If the time is after the end of the trace, return ERANGE. */
1279 if(ltt_time_compare(time
, tf
->buffer
.end
.timestamp
) > 0) {
1283 /* Binary search the block */
1284 high
= tf
->num_blocks
- 1;
1288 block_num
= ((high
-low
) / 2) + low
;
1290 err
= map_block(tf
, block_num
);
1292 g_error("Can not map block");
1296 /* We cannot divide anymore : this is what would happen if the time
1297 * requested was exactly between two consecutive buffers'end and start
1298 * timestamps. This is also what would happend if we didn't deal with out
1299 * of span cases prior in this function. */
1300 /* The event is right in the buffer!
1301 * (or in the next buffer first event) */
1303 ret
= ltt_tracefile_read(tf
);
1304 if(ret
== ERANGE
) goto range
; /* ERANGE or EPERM */
1305 else if(ret
) goto fail
;
1307 if(ltt_time_compare(time
, tf
->event
.event_time
) >= 0)
1311 } else if(ltt_time_compare(time
, tf
->buffer
.begin
.timestamp
) < 0) {
1312 /* go to lower part */
1314 } else if(ltt_time_compare(time
, tf
->buffer
.end
.timestamp
) > 0) {
1315 /* go to higher part */
1317 } else {/* The event is right in the buffer!
1318 (or in the next buffer first event) */
1320 ret
= ltt_tracefile_read(tf
);
1321 if(ret
== ERANGE
) goto range
; /* ERANGE or EPERM */
1322 else if(ret
) goto fail
;
1324 if(ltt_time_compare(time
, tf
->event
.event_time
) >= 0)
1336 /* Error handling */
1338 g_error("ltt_tracefile_seek_time failed on tracefile %s",
1339 g_quark_to_string(tf
->name
));
1344 int ltt_tracefile_seek_position(LttTracefile
*tf
, const LttEventPosition
*ep
) {
1348 if(ep
->tracefile
!= tf
) {
1352 err
= map_block(tf
, ep
->block
);
1354 g_error("Can not map block");
1358 tf
->event
.offset
= ep
->offset
;
1360 err
= ltt_tracefile_read_update_event(tf
);
1362 err
= ltt_tracefile_read_op(tf
);
1368 g_error("ltt_tracefile_seek_time failed on tracefile %s",
1369 g_quark_to_string(tf
->name
));
1372 /* Calculate the real event time based on the buffer boundaries */
1373 LttTime
ltt_interpolate_time(LttTracefile
*tf
, LttEvent
*event
)
1377 g_assert(tf
->trace
->has_tsc
);
1379 time
= ltt_time_from_uint64(
1380 (guint64
)tf
->buffer
.tsc
*tf
->buffer
.nsecs_per_cycle
);
1381 time
= ltt_time_add(tf
->buffer
.begin
.timestamp
, time
);
1387 /* Get the current event of the tracefile : valid until the next read */
1388 LttEvent
*ltt_tracefile_get_event(LttTracefile
*tf
)
1395 /*****************************************************************************
1397 * ltt_tracefile_read : Read the next event in the tracefile
1402 * Returns 0 if an event can be used in tf->event.
1403 * Returns ERANGE on end of trace. The event in tf->event still can be used.
1404 * Returns EPERM on error.
1406 * This function does make the tracefile event structure point to the event
1407 * currently pointed to by the tf->event.
1409 * Note : you must call a ltt_tracefile_seek to the beginning of the trace to
1410 * reinitialize it after an error if you want results to be coherent.
1411 * It would be the case if a end of trace last buffer has no event : the end
1412 * of trace wouldn't be returned, but an error.
1413 * We make the assumption there is at least one event per buffer.
1414 ****************************************************************************/
1416 int ltt_tracefile_read(LttTracefile
*tf
)
1420 err
= ltt_tracefile_read_seek(tf
);
1422 err
= ltt_tracefile_read_update_event(tf
);
1424 err
= ltt_tracefile_read_op(tf
);
1430 int ltt_tracefile_read_seek(LttTracefile
*tf
)
1434 /* Get next buffer until we finally have an event, or end of trace */
1436 err
= ltt_seek_next_event(tf
);
1437 if(unlikely(err
== ENOPROTOOPT
)) {
1441 /* Are we at the end of the buffer ? */
1443 if(unlikely(tf
->buffer
.index
== tf
->num_blocks
-1)){ /* end of trace ? */
1446 /* get next block */
1447 err
= map_block(tf
, tf
->buffer
.index
+ 1);
1449 g_error("Can not map block");
1453 } else break; /* We found an event ! */
1460 /* do specific operation on events */
1461 int ltt_tracefile_read_op(LttTracefile
*tf
)
1470 /* do event specific operation */
1472 /* do something if its an heartbeat event : increment the heartbeat count */
1473 //if(event->facility_id == LTT_FACILITY_CORE)
1474 // if(event->event_id == LTT_EVENT_HEARTBEAT)
1475 // tf->cur_heart_beat_number++;
1481 /* same as ltt_tracefile_read, but does not seek to the next event nor call
1482 * event specific operation. */
1483 int ltt_tracefile_read_update_event(LttTracefile
*tf
)
1491 pos
= tf
->buffer
.head
+ event
->offset
;
1493 /* Read event header */
1497 if(tf
->trace
->has_tsc
) {
1498 if(tf
->trace
->has_heartbeat
) {
1499 event
->time
.timestamp
= ltt_get_uint32(LTT_GET_BO(tf
),
1501 /* 32 bits -> 64 bits tsc */
1502 /* note : still works for seek and non seek cases. */
1503 if(event
->time
.timestamp
< (0xFFFFFFFFULL
&tf
->buffer
.tsc
)) {
1504 tf
->buffer
.tsc
= ((tf
->buffer
.tsc
&0xFFFFFFFF00000000ULL
)
1506 | (guint64
)event
->time
.timestamp
;
1507 event
->tsc
= tf
->buffer
.tsc
;
1510 tf
->buffer
.tsc
= (tf
->buffer
.tsc
&0xFFFFFFFF00000000ULL
)
1511 | (guint64
)event
->time
.timestamp
;
1512 event
->tsc
= tf
->buffer
.tsc
;
1514 pos
+= sizeof(guint32
);
1516 event
->tsc
= ltt_get_uint64(LTT_GET_BO(tf
), pos
);
1517 tf
->buffer
.tsc
= event
->tsc
;
1518 pos
+= sizeof(guint64
);
1521 event
->event_time
= ltt_interpolate_time(tf
, event
);
1523 event
->time
.delta
.tv_sec
= 0;
1524 event
->time
.delta
.tv_nsec
= ltt_get_uint32(LTT_GET_BO(tf
),
1525 pos
) * NSEC_PER_USEC
;
1527 event
->tsc
= tf
->buffer
.tsc
;
1529 event
->event_time
= ltt_time_add(tf
->buffer
.begin
.timestamp
,
1531 pos
+= sizeof(guint32
);
1534 event
->facility_id
= *(guint8
*)pos
;
1535 pos
+= sizeof(guint8
);
1537 event
->event_id
= *(guint8
*)pos
;
1538 pos
+= sizeof(guint8
);
1540 event
->event_size
= ltt_get_uint16(LTT_GET_BO(tf
), pos
);
1541 pos
+= sizeof(guint16
);
1545 /* get the data size and update the event fields with the current
1547 ltt_update_event_size(tf
);
1553 /****************************************************************************
1555 * map_block : map a block from the file
1557 * lttdes : ltt trace file
1558 * whichBlock : the block which will be read
1561 * EINVAL : lseek fail
1562 * EIO : can not read from the file
1563 ****************************************************************************/
1565 static gint
map_block(LttTracefile
* tf
, guint block_num
)
1567 int page_size
= getpagesize();
1568 struct ltt_block_start_header
*header
;
1570 g_assert(block_num
< tf
->num_blocks
);
1572 if(tf
->buffer
.head
!= NULL
)
1573 munmap(tf
->buffer
.head
, PAGE_ALIGN(tf
->buf_size
));
1575 /* Multiple of pages aligned head */
1576 tf
->buffer
.head
= mmap(0,
1577 PAGE_ALIGN(tf
->block_size
),
1578 PROT_READ
, MAP_PRIVATE
, tf
->fd
,
1579 PAGE_ALIGN((off_t
)tf
->block_size
* (off_t
)block_num
));
1581 if(tf
->buffer
.head
== MAP_FAILED
) {
1582 perror("Error in allocating memory for buffer of tracefile");
1586 g_assert( ( (guint
)tf
->buffer
.head
&(8-1) ) == 0); // make sure it's aligned.
1589 tf
->buffer
.index
= block_num
;
1591 header
= (struct ltt_block_start_header
*)tf
->buffer
.head
;
1593 tf
->buffer
.begin
.timestamp
= ltt_get_time(LTT_GET_BO(tf
),
1594 &header
->begin
.timestamp
);
1595 tf
->buffer
.begin
.timestamp
.tv_nsec
*= NSEC_PER_USEC
;
1596 tf
->buffer
.begin
.cycle_count
= ltt_get_uint64(LTT_GET_BO(tf
),
1597 &header
->begin
.cycle_count
);
1598 tf
->buffer
.end
.timestamp
= ltt_get_time(LTT_GET_BO(tf
),
1599 &header
->end
.timestamp
);
1600 tf
->buffer
.end
.timestamp
.tv_nsec
*= NSEC_PER_USEC
;
1601 tf
->buffer
.end
.cycle_count
= ltt_get_uint64(LTT_GET_BO(tf
),
1602 &header
->end
.cycle_count
);
1603 tf
->buffer
.lost_size
= ltt_get_uint32(LTT_GET_BO(tf
),
1604 &header
->lost_size
);
1606 tf
->buffer
.tsc
= tf
->buffer
.begin
.cycle_count
;
1607 tf
->event
.tsc
= tf
->buffer
.tsc
;
1610 * eventually support variable buffer size : will need a partial pre-read of
1611 * the headers to create an index when we open the trace... eventually. */
1612 g_assert(tf
->block_size
== ltt_get_uint32(LTT_GET_BO(tf
),
1613 &header
->buf_size
));
1615 /* Now that the buffer is mapped, calculate the time interpolation for the
1618 tf
->buffer
.nsecs_per_cycle
= calc_nsecs_per_cycle(tf
);
1620 /* Make the current event point to the beginning of the buffer :
1621 * it means that the event read must get the first event. */
1622 tf
->event
.tracefile
= tf
;
1623 tf
->event
.block
= block_num
;
1624 tf
->event
.offset
= 0;
1633 /* It will update the fields offsets too */
1634 void ltt_update_event_size(LttTracefile
*tf
)
1638 /* Specific handling of core events : necessary to read the facility control
1640 LttFacility
*f
= ltt_trace_get_facility_by_num(tf
->trace
,
1641 tf
->event
.facility_id
);
1643 if(likely(tf
->event
.facility_id
== LTT_FACILITY_CORE
)) {
1644 switch((enum ltt_core_events
)tf
->event
.event_id
) {
1645 case LTT_EVENT_FACILITY_LOAD
:
1646 size
= strlen((char*)tf
->event
.data
) + 1;
1647 g_debug("Update Event facility load of facility %s", (char*)tf
->event
.data
);
1648 size
+= sizeof(struct LttFacilityLoad
);
1650 case LTT_EVENT_FACILITY_UNLOAD
:
1651 g_debug("Update Event facility unload");
1652 size
= sizeof(struct LttFacilityUnload
);
1654 case LTT_EVENT_STATE_DUMP_FACILITY_LOAD
:
1655 size
= strlen((char*)tf
->event
.data
) + 1;
1656 g_debug("Update Event facility load state dump of facility %s",
1657 (char*)tf
->event
.data
);
1658 size
+= sizeof(struct LttStateDumpFacilityLoad
);
1660 case LTT_EVENT_HEARTBEAT
:
1661 g_debug("Update Event heartbeat");
1662 size
= sizeof(TimeHeartbeat
);
1665 g_warning("Error in getting event size : tracefile %s, "
1666 "unknown event id %hhu in core facility.",
1667 g_quark_to_string(tf
->name
),
1668 tf
->event
.event_id
);
1669 goto event_id_error
;
1674 g_error("Unknown facility %hhu (0x%hhx) in tracefile %s",
1675 tf
->event
.facility_id
,
1676 tf
->event
.facility_id
,
1677 g_quark_to_string(tf
->name
));
1678 goto facility_error
;
1681 LttEventType
*event_type
=
1682 ltt_facility_eventtype_get(f
, tf
->event
.event_id
);
1685 g_error("Unknown event id %hhu in facility %s in tracefile %s",
1687 g_quark_to_string(f
->name
),
1688 g_quark_to_string(tf
->name
));
1689 goto event_type_error
;
1692 if(event_type
->root_field
)
1693 size
= get_field_type_size(tf
, event_type
,
1694 0, 0, event_type
->root_field
, tf
->event
.data
);
1698 g_debug("Event root field : f.e %hhu.%hhu size %lu", tf
->event
.facility_id
,
1699 tf
->event
.event_id
, size
);
1702 tf
->event
.data_size
= size
;
1704 /* Check consistency between kernel and LTTV structure sizes */
1705 g_assert(tf
->event
.data_size
== tf
->event
.event_size
);
1712 tf
->event
.data_size
= 0;
1716 /* Take the tf current event offset and use the event facility id and event id
1717 * to figure out where is the next event offset.
1719 * This is an internal function not aiming at being used elsewhere : it will
1720 * not jump over the current block limits. Please consider using
1721 * ltt_tracefile_read to do this.
1723 * Returns 0 on success
1724 * ERANGE if we are at the end of the buffer.
1725 * ENOPROTOOPT if an error occured when getting the current event size.
1727 static int ltt_seek_next_event(LttTracefile
*tf
)
1733 /* seek over the buffer header if we are at the buffer start */
1734 if(tf
->event
.offset
== 0) {
1735 tf
->event
.offset
+= sizeof(struct ltt_block_start_header
);
1737 if(tf
->event
.offset
== tf
->block_size
- tf
->buffer
.lost_size
) {
1744 pos
= tf
->event
.data
;
1746 if(tf
->event
.data_size
< 0) goto error
;
1748 pos
+= (size_t)tf
->event
.data_size
;
1750 tf
->event
.offset
= pos
- tf
->buffer
.head
;
1752 if(tf
->event
.offset
== tf
->block_size
- tf
->buffer
.lost_size
) {
1761 g_error("Error in ltt_seek_next_event for tracefile %s",
1762 g_quark_to_string(tf
->name
));
1767 /*****************************************************************************
1769 * calc_nsecs_per_cycle : calculate nsecs per cycle for current block
1772 ****************************************************************************/
1774 static double calc_nsecs_per_cycle(LttTracefile
* tf
)
1776 LttTime lBufTotalTime
; /* Total time for this buffer */
1777 double lBufTotalNSec
; /* Total time for this buffer in nsecs */
1778 LttCycleCount lBufTotalCycle
;/* Total cycles for this buffer */
1780 /* Calculate the total time for this buffer */
1781 lBufTotalTime
= ltt_time_sub(
1782 ltt_get_time(LTT_GET_BO(tf
), &tf
->buffer
.end
.timestamp
),
1783 ltt_get_time(LTT_GET_BO(tf
), &tf
->buffer
.begin
.timestamp
));
1785 /* Calculate the total cycles for this bufffer */
1786 lBufTotalCycle
= ltt_get_uint64(LTT_GET_BO(tf
), &tf
->buffer
.end
.cycle_count
);
1787 lBufTotalCycle
-= ltt_get_uint64(LTT_GET_BO(tf
),
1788 &tf
->buffer
.begin
.cycle_count
);
1790 /* Convert the total time to double */
1791 lBufTotalNSec
= ltt_time_to_double(lBufTotalTime
);
1793 return lBufTotalNSec
/ (double)lBufTotalCycle
;
1797 void setFieldsOffset(LttTracefile
*tf
, LttEventType
*evT
,void *evD
)
1799 LttField
* rootFld
= evT
->root_field
;
1800 // rootFld->base_address = evD;
1803 rootFld
->field_size
= getFieldtypeSize(tf
, evT
->facility
,
1804 evT
, 0,0,rootFld
, evD
);
1808 /*****************************************************************************
1810 * set_fields_offsets : set the precomputable offset of the fields
1812 * tracefile : opened trace file
1813 * event_type : the event type
1814 ****************************************************************************/
1816 void set_fields_offsets(LttTracefile
*tf
, LttEventType
*event_type
)
1818 LttField
*field
= event_type
->root_field
;
1819 enum field_status fixed_root
= FIELD_FIXED
, fixed_parent
= FIELD_FIXED
;
1822 preset_field_type_size(tf
, event_type
, 0, 0,
1823 &fixed_root
, &fixed_parent
,
1829 /*****************************************************************************
1831 * preset_field_type_size : set the fixed sizes of the field type
1834 * event_type : event type
1835 * offset_root : offset from the root
1836 * offset_parent : offset from the parent
1837 * fixed_root : Do we know a fixed offset to the root ?
1838 * fixed_parent : Do we know a fixed offset to the parent ?
1840 ****************************************************************************/
1841 void preset_field_type_size(LttTracefile
*tf
, LttEventType
*event_type
,
1842 off_t offset_root
, off_t offset_parent
,
1843 enum field_status
*fixed_root
, enum field_status
*fixed_parent
,
1846 enum field_status local_fixed_root
, local_fixed_parent
;
1850 g_assert(field
->fixed_root
== FIELD_UNKNOWN
);
1851 g_assert(field
->fixed_parent
== FIELD_UNKNOWN
);
1852 g_assert(field
->fixed_size
== FIELD_UNKNOWN
);
1854 type
= field
->field_type
;
1856 field
->fixed_root
= *fixed_root
;
1857 if(field
->fixed_root
== FIELD_FIXED
)
1858 field
->offset_root
= offset_root
;
1860 field
->offset_root
= 0;
1862 field
->fixed_parent
= *fixed_parent
;
1863 if(field
->fixed_parent
== FIELD_FIXED
)
1864 field
->offset_parent
= offset_parent
;
1866 field
->offset_parent
= 0;
1868 size_t current_root_offset
;
1869 size_t current_offset
;
1870 enum field_status current_child_status
, final_child_status
;
1873 switch(type
->type_class
) {
1878 field
->field_size
= ltt_type_size(tf
->trace
, type
);
1879 field
->fixed_size
= FIELD_FIXED
;
1882 field
->field_size
= (off_t
)event_type
->facility
->pointer_size
;
1883 field
->fixed_size
= FIELD_FIXED
;
1887 field
->field_size
= (off_t
)event_type
->facility
->long_size
;
1888 field
->fixed_size
= FIELD_FIXED
;
1893 field
->field_size
= (off_t
)event_type
->facility
->size_t_size
;
1894 field
->fixed_size
= FIELD_FIXED
;
1897 local_fixed_root
= FIELD_VARIABLE
;
1898 local_fixed_parent
= FIELD_VARIABLE
;
1899 preset_field_type_size(tf
, event_type
,
1901 &local_fixed_root
, &local_fixed_parent
,
1903 field
->fixed_size
= FIELD_VARIABLE
;
1904 field
->field_size
= 0;
1905 *fixed_root
= FIELD_VARIABLE
;
1906 *fixed_parent
= FIELD_VARIABLE
;
1909 field
->fixed_size
= FIELD_VARIABLE
;
1910 field
->field_size
= 0;
1911 *fixed_root
= FIELD_VARIABLE
;
1912 *fixed_parent
= FIELD_VARIABLE
;
1915 local_fixed_root
= FIELD_VARIABLE
;
1916 local_fixed_parent
= FIELD_VARIABLE
;
1917 preset_field_type_size(tf
, event_type
,
1919 &local_fixed_root
, &local_fixed_parent
,
1921 field
->fixed_size
= field
->child
[0]->fixed_size
;
1922 if(field
->fixed_size
== FIELD_FIXED
) {
1923 field
->field_size
= type
->element_number
* field
->child
[0]->field_size
;
1925 field
->field_size
= 0;
1926 *fixed_root
= FIELD_VARIABLE
;
1927 *fixed_parent
= FIELD_VARIABLE
;
1931 current_root_offset
= field
->offset_root
;
1933 current_child_status
= FIELD_FIXED
;
1934 for(i
=0;i
<type
->element_number
;i
++) {
1935 preset_field_type_size(tf
, event_type
,
1936 current_root_offset
, current_offset
,
1937 fixed_root
, ¤t_child_status
,
1939 if(current_child_status
== FIELD_FIXED
) {
1940 current_root_offset
+= field
->child
[i
]->field_size
;
1941 current_offset
+= field
->child
[i
]->field_size
;
1943 current_root_offset
= 0;
1947 if(current_child_status
!= FIELD_FIXED
) {
1948 *fixed_parent
= current_child_status
;
1949 field
->field_size
= 0;
1950 field
->fixed_size
= current_child_status
;
1952 field
->field_size
= current_offset
;
1953 field
->fixed_size
= FIELD_FIXED
;
1957 current_root_offset
= field
->offset_root
;
1960 final_child_status
= FIELD_FIXED
;
1961 for(i
=0;i
<type
->element_number
;i
++) {
1962 enum field_status current_root_child_status
= FIELD_FIXED
;
1963 enum field_status current_child_status
= FIELD_FIXED
;
1964 preset_field_type_size(tf
, event_type
,
1965 current_root_offset
, current_offset
,
1966 ¤t_root_child_status
, ¤t_child_status
,
1968 if(current_child_status
!= FIELD_FIXED
)
1969 final_child_status
= current_child_status
;
1971 max_size
= max(max_size
, field
->child
[i
]->field_size
);
1973 if(final_child_status
!= FIELD_FIXED
) {
1974 *fixed_root
= final_child_status
;
1975 *fixed_parent
= final_child_status
;
1976 field
->field_size
= 0;
1977 field
->fixed_size
= current_child_status
;
1979 field
->field_size
= max_size
;
1980 field
->fixed_size
= FIELD_FIXED
;
1988 /*****************************************************************************
1990 * check_fields_compatibility : Check for compatibility between two fields :
1991 * do they use the same inner structure ?
1993 * event_type1 : event type
1994 * event_type2 : event type
1997 *Returns : 0 if identical
1999 ****************************************************************************/
2000 gint
check_fields_compatibility(LttEventType
*event_type1
,
2001 LttEventType
*event_type2
,
2002 LttField
*field1
, LttField
*field2
)
2004 guint different
= 0;
2005 enum field_status local_fixed_root
, local_fixed_parent
;
2010 if(field1
== NULL
) {
2011 if(field2
== NULL
) goto end
;
2016 } else if(field2
== NULL
) {
2021 g_assert(field1
->fixed_root
!= FIELD_UNKNOWN
);
2022 g_assert(field2
->fixed_root
!= FIELD_UNKNOWN
);
2023 g_assert(field1
->fixed_parent
!= FIELD_UNKNOWN
);
2024 g_assert(field2
->fixed_parent
!= FIELD_UNKNOWN
);
2025 g_assert(field1
->fixed_size
!= FIELD_UNKNOWN
);
2026 g_assert(field2
->fixed_size
!= FIELD_UNKNOWN
);
2028 type1
= field1
->field_type
;
2029 type2
= field2
->field_type
;
2031 size_t current_root_offset
;
2032 size_t current_offset
;
2033 enum field_status current_child_status
, final_child_status
;
2036 if(type1
->type_class
!= type2
->type_class
) {
2040 if(type1
->element_name
!= type2
->element_name
) {
2045 switch(type1
->type_class
) {
2055 if(field1
->field_size
!= field2
->field_size
) {
2061 if(type1
->element_number
!= type2
->element_number
) {
2065 for(i
=0;i
<type1
->element_number
;i
++) {
2066 if(type1
->enum_strings
[i
] != type2
->enum_strings
[i
]) {
2073 /* Two elements : size and child */
2074 g_assert(type1
->element_number
!= type2
->element_number
);
2075 for(i
=0;i
<type1
->element_number
;i
++) {
2076 if(check_fields_compatibility(event_type1
, event_type2
,
2077 field1
->child
[0], field2
->child
[0])) {
2086 if(field1
->field_size
!= field2
->field_size
) {
2090 /* Two elements : size and child */
2091 g_assert(type1
->element_number
!= type2
->element_number
);
2092 for(i
=0;i
<type1
->element_number
;i
++) {
2093 if(check_fields_compatibility(event_type1
, event_type2
,
2094 field1
->child
[0], field2
->child
[0])) {
2102 if(type1
->element_number
!= type2
->element_number
) {
2106 for(i
=0;i
<type1
->element_number
;i
++) {
2107 if(check_fields_compatibility(event_type1
, event_type2
,
2108 field1
->child
[0], field2
->child
[0])) {
2123 /*****************************************************************************
2125 * getFieldtypeSize: get the size of the field type (primitive type)
2128 * offsetRoot : offset from the root
2129 * offsetParent : offset from the parrent
2131 * evD : event data, it may be NULL
2133 * int : size of the field
2134 ****************************************************************************/
2136 static inline gint
getFieldtypeSize(LttTracefile
*tf
,
2137 LttEventType
* evT
, gint offsetRoot
,
2138 gint offsetParent
, LttField
* fld
, void *evD
)
2140 gint size
, size1
, element_number
, i
, offset1
, offset2
;
2141 LttType
* type
= fld
->field_type
;
2143 /* This likely has been tested with gcov : half of them.. */
2144 if(unlikely(fld
->field_fixed
== 1)){
2146 if(unlikely(fld
== evT
->root_field
)) {
2147 size
= fld
->field_size
;
2148 goto end_getFieldtypeSize
;
2152 /* From gcov profiling : half string, half struct, can we gain something
2153 * from that ? (Mathieu) */
2154 switch(type
->type_class
) {
2156 element_number
= (int) type
->element_number
;
2157 if(fld
->field_fixed
== -1){
2158 size
= getFieldtypeSize(tf
, evT
, offsetRoot
,
2159 0,fld
->child
[0], NULL
);
2160 if(size
== 0){ //has string or sequence
2161 fld
->field_fixed
= 0;
2163 fld
->field_fixed
= 1;
2164 size
*= element_number
;
2166 }else if(fld
->field_fixed
== 0){// has string or sequence
2168 for(i
=0;i
<element_number
;i
++){
2169 size
+= getFieldtypeSize(tf
, evT
, offsetRoot
+size
,size
,
2170 fld
->child
[0], evD
+size
);
2172 }else size
= fld
->field_size
;
2174 fld
->fixed_root
= (offsetRoot
==-1) ? 0 : 1;
2175 fld
->fixed_parent
= (offsetParent
==-1) ? 0 : 1;
2181 size1
= (int) ltt_type_size(fac
, type
);
2182 if(fld
->field_fixed
== -1){
2183 fld
->sequ_number_size
= size1
;
2184 fld
->field_fixed
= 0;
2185 size
= getFieldtypeSize(evT
, offsetRoot
,
2186 0,fld
->child
[0], NULL
);
2187 fld
->element_size
= size
;
2189 element_number
= getIntNumber(tf
,size1
,evD
);
2190 type
->element_number
= element_number
;
2191 if(fld
->element_size
> 0){
2192 size
= element_number
* fld
->element_size
;
2193 }else{//sequence has string or sequence
2195 for(i
=0;i
<element_number
;i
++){
2196 size
+= getFieldtypeSize(tf
, evT
,
2197 offsetRoot
+size
+size1
,size
+size1
,
2198 fld
->child
[0], evD
+size
+size1
);
2204 fld
->fixed_root
= (offsetRoot
==-1) ? 0 : 1;
2205 fld
->fixed_parent
= (offsetParent
==-1) ? 0 : 1;
2212 if(fld
->field_fixed
== -1){
2213 fld
->field_fixed
= 0;
2215 /* Hope my implementation is faster than strlen (Mathieu) */
2216 char *ptr
=(char*)evD
;
2218 /* from gcov : many many strings are empty, make it the common case.*/
2219 while(unlikely(*ptr
!= '\0')) { size
++; ptr
++; }
2220 //size = ptr - (char*)evD + 1; //include end : '\0'
2222 fld
->fixed_root
= (offsetRoot
==-1) ? 0 : 1;
2223 fld
->fixed_parent
= (offsetParent
==-1) ? 0 : 1;
2228 element_number
= (int) type
->element_number
;
2230 /* tested with gcov */
2231 if(unlikely(fld
->field_fixed
== -1)){
2232 offset1
= offsetRoot
;
2234 for(i
=0;i
<element_number
;i
++){
2235 size1
=getFieldtypeSize(tf
, evT
,offset1
,offset2
,
2236 fld
->child
[i
], NULL
);
2237 if(likely(size1
> 0 && size
>= 0)){
2239 if(likely(offset1
>= 0)) offset1
+= size1
;
2247 if(unlikely(size
== -1)){
2248 fld
->field_fixed
= 0;
2250 }else fld
->field_fixed
= 1;
2251 }else if(likely(fld
->field_fixed
== 0)){
2252 offset1
= offsetRoot
;
2254 for(i
=0;unlikely(i
<element_number
);i
++){
2255 size
=getFieldtypeSize(tf
, evT
, offset1
, offset2
,
2256 fld
->child
[i
], evD
+offset2
);
2261 }else size
= fld
->field_size
;
2262 fld
->fixed_root
= (offsetRoot
==-1) ? 0 : 1;
2263 fld
->fixed_parent
= (offsetParent
==-1) ? 0 : 1;
2267 if(unlikely(fld
->field_fixed
== -1)){
2268 size
= (int) ltt_type_size(LTT_GET_BO(tf
), type
);
2269 fld
->field_fixed
= 1;
2270 }else size
= fld
->field_size
;
2272 fld
->fixed_root
= (offsetRoot
==-1) ? 0 : 1;
2273 fld
->fixed_parent
= (offsetParent
==-1) ? 0 : 1;
2278 fld
->offset_root
= offsetRoot
;
2279 fld
->offset_parent
= offsetParent
;
2280 fld
->field_size
= size
;
2282 end_getFieldtypeSize
:
2288 /*****************************************************************************
2290 * ltt_get_int : get an integer number
2292 * reverse_byte_order: must we reverse the byte order ?
2293 * size : the size of the integer
2294 * ptr : the data pointer
2296 * gint64 : a 64 bits integer
2297 ****************************************************************************/
2299 gint64
ltt_get_int(gboolean reverse_byte_order
, gint size
, void *data
)
2304 case 1: val
= *((gint8
*)data
); break;
2305 case 2: val
= ltt_get_int16(reverse_byte_order
, data
); break;
2306 case 4: val
= ltt_get_int32(reverse_byte_order
, data
); break;
2307 case 8: val
= ltt_get_int64(reverse_byte_order
, data
); break;
2308 default: val
= ltt_get_int64(reverse_byte_order
, data
);
2309 g_critical("get_int : integer size %d unknown", size
);
2316 /*****************************************************************************
2318 * ltt_get_uint : get an unsigned integer number
2320 * reverse_byte_order: must we reverse the byte order ?
2321 * size : the size of the integer
2322 * ptr : the data pointer
2324 * guint64 : a 64 bits unsigned integer
2325 ****************************************************************************/
2327 guint64
ltt_get_uint(gboolean reverse_byte_order
, gint size
, void *data
)
2332 case 1: val
= *((gint8
*)data
); break;
2333 case 2: val
= ltt_get_uint16(reverse_byte_order
, data
); break;
2334 case 4: val
= ltt_get_uint32(reverse_byte_order
, data
); break;
2335 case 8: val
= ltt_get_uint64(reverse_byte_order
, data
); break;
2336 default: val
= ltt_get_uint64(reverse_byte_order
, data
);
2337 g_critical("get_uint : unsigned integer size %d unknown",
2346 /* get the node name of the system */
2348 char * ltt_trace_system_description_node_name (LttSystemDescription
* s
)
2350 return s
->node_name
;
2354 /* get the domain name of the system */
2356 char * ltt_trace_system_description_domain_name (LttSystemDescription
* s
)
2358 return s
->domain_name
;
2362 /* get the description of the system */
2364 char * ltt_trace_system_description_description (LttSystemDescription
* s
)
2366 return s
->description
;
2370 /* get the start time of the trace */
2372 LttTime
ltt_trace_system_description_trace_start_time(LttSystemDescription
*s
)
2374 return s
->trace_start
;
2378 LttTracefile
*ltt_tracefile_new()
2380 return g_new(LttTracefile
, 1);
2383 void ltt_tracefile_destroy(LttTracefile
*tf
)
2388 void ltt_tracefile_copy(LttTracefile
*dest
, const LttTracefile
*src
)
2393 /* Before library loading... */
2395 static void __attribute__((constructor
)) init(void)
2397 LTT_FACILITY_NAME_HEARTBEAT
= g_quark_from_string("heartbeat");
2398 LTT_EVENT_NAME_HEARTBEAT
= g_quark_from_string("heartbeat");
2400 LTT_TRACEFILE_NAME_FACILITIES
= g_quark_from_string("/control/facilities");