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 /* set the offset of the fields belonging to the event,
80 need the information of the archecture */
81 void set_fields_offsets(LttTracefile
*tf
, LttEventType
*event_type
);
82 //size_t get_fields_offsets(LttTracefile *tf, LttEventType *event_type, void *data);
84 /* get the size of the field type according to
85 * The facility size information. */
86 static inline void preset_field_type_size(LttTracefile
*tf
,
87 LttEventType
*event_type
,
88 off_t offset_root
, off_t offset_parent
,
89 enum field_status
*fixed_root
, enum field_status
*fixed_parent
,
92 /* map a fixed size or a block information from the file (fd) */
93 static gint
map_block(LttTracefile
* tf
, guint block_num
);
95 /* calculate nsec per cycles for current block */
96 static double calc_nsecs_per_cycle(LttTracefile
* t
);
98 /* go to the next event */
99 static int ltt_seek_next_event(LttTracefile
*tf
);
101 void ltt_update_event_size(LttTracefile
*tf
);
104 /* Functions to parse system.xml file (using glib xml parser) */
105 static void parser_start_element (GMarkupParseContext __UNUSED__
*context
,
106 const gchar
*element_name
,
107 const gchar
**attribute_names
,
108 const gchar
**attribute_values
,
113 LttSystemDescription
* des
= (LttSystemDescription
* )user_data
;
114 if(strcmp("system", element_name
)){
115 *error
= g_error_new(G_MARKUP_ERROR
,
117 "This is not system.xml file");
121 while(attribute_names
[i
]){
122 if(strcmp("node_name", attribute_names
[i
])==0){
123 des
->node_name
= g_strdup(attribute_values
[i
]);
124 }else if(strcmp("domainname", attribute_names
[i
])==0){
125 des
->domain_name
= g_strdup(attribute_values
[i
]);
126 }else if(strcmp("cpu", attribute_names
[i
])==0){
127 des
->nb_cpu
= atoi(attribute_values
[i
]);
128 }else if(strcmp("arch_size", attribute_names
[i
])==0){
129 if(strcmp(attribute_values
[i
],"LP32") == 0) des
->size
= LTT_LP32
;
130 else if(strcmp(attribute_values
[i
],"ILP32") == 0) des
->size
= LTT_ILP32
;
131 else if(strcmp(attribute_values
[i
],"LP64") == 0) des
->size
= LTT_LP64
;
132 else if(strcmp(attribute_values
[i
],"ILP64") == 0) des
->size
= LTT_ILP64
;
133 else if(strcmp(attribute_values
[i
],"UNKNOWN") == 0) des
->size
= LTT_UNKNOWN
;
134 }else if(strcmp("endian", attribute_names
[i
])==0){
135 if(strcmp(attribute_values
[i
],"LITTLE_ENDIAN") == 0)
136 des
->endian
= LTT_LITTLE_ENDIAN
;
137 else if(strcmp(attribute_values
[i
],"BIG_ENDIAN") == 0)
138 des
->endian
= LTT_BIG_ENDIAN
;
139 }else if(strcmp("kernel_name", attribute_names
[i
])==0){
140 des
->kernel_name
= g_strdup(attribute_values
[i
]);
141 }else if(strcmp("kernel_release", attribute_names
[i
])==0){
142 des
->kernel_release
= g_strdup(attribute_values
[i
]);
143 }else if(strcmp("kernel_version", attribute_names
[i
])==0){
144 des
->kernel_version
= g_strdup(attribute_values
[i
]);
145 }else if(strcmp("machine", attribute_names
[i
])==0){
146 des
->machine
= g_strdup(attribute_values
[i
]);
147 }else if(strcmp("processor", attribute_names
[i
])==0){
148 des
->processor
= g_strdup(attribute_values
[i
]);
149 }else if(strcmp("hardware_platform", attribute_names
[i
])==0){
150 des
->hardware_platform
= g_strdup(attribute_values
[i
]);
151 }else if(strcmp("operating_system", attribute_names
[i
])==0){
152 des
->operating_system
= g_strdup(attribute_values
[i
]);
153 }else if(strcmp("ltt_major_version", attribute_names
[i
])==0){
154 des
->ltt_major_version
= atoi(attribute_values
[i
]);
155 }else if(strcmp("ltt_minor_version", attribute_names
[i
])==0){
156 des
->ltt_minor_version
= atoi(attribute_values
[i
]);
157 }else if(strcmp("ltt_block_size", attribute_names
[i
])==0){
158 des
->ltt_block_size
= atoi(attribute_values
[i
]);
160 *error
= g_error_new(G_MARKUP_ERROR
,
162 "Not a valid attribute");
169 static void parser_characters (GMarkupParseContext __UNUSED__
*context
,
171 gsize __UNUSED__ text_len
,
173 GError __UNUSED__
**error
)
175 LttSystemDescription
* des
= (LttSystemDescription
* )user_data
;
176 des
->description
= g_strdup(text
);
179 LttFacility
*ltt_trace_get_facility_by_num(LttTrace
*t
,
182 g_assert(num
< t
->facilities_by_num
->len
);
184 return &g_array_index(t
->facilities_by_num
, LttFacility
, num
);
188 guint
ltt_trace_get_num_cpu(LttTrace
*t
)
196 * Return value : 0 success, 1 bad tracefile
198 int parse_trace_header(void *header
, LttTracefile
*tf
, LttTrace
*t
)
200 guint32
*magic_number
= (guint32
*)header
;
201 struct ltt_trace_header_any
*any
= (struct ltt_trace_header_any
*)header
;
203 if(*magic_number
== LTT_MAGIC_NUMBER
)
205 else if(*magic_number
== LTT_REV_MAGIC_NUMBER
)
207 else /* invalid magic number, bad tracefile ! */
210 /* Get float byte order : might be different from int byte order
211 * (or is set to 0 if the trace has no float (kernel trace)) */
212 tf
->float_word_order
= any
->float_word_order
;
215 t
->arch_type
= ltt_get_uint32(LTT_GET_BO(tf
),
217 t
->arch_variant
= ltt_get_uint32(LTT_GET_BO(tf
),
219 t
->arch_size
= any
->arch_size
;
220 t
->ltt_major_version
= any
->major_version
;
221 t
->ltt_minor_version
= any
->minor_version
;
222 t
->flight_recorder
= any
->flight_recorder
;
223 t
->has_heartbeat
= any
->has_heartbeat
;
224 t
->has_alignment
= any
->has_alignment
;
225 t
->has_tsc
= any
->has_tsc
;
229 switch(any
->major_version
) {
232 switch(any
->minor_version
) {
235 tf
->buffer_header_size
=
236 sizeof(struct ltt_block_start_header
)
237 + sizeof(struct ltt_trace_header_0_3
);
238 g_warning("Unsupported trace version : %hhu.%hhu",
239 any
->major_version
, any
->minor_version
);
245 struct ltt_trace_header_0_4
*vheader
=
246 (struct ltt_trace_header_0_4
*)header
;
247 tf
->buffer_header_size
=
248 sizeof(struct ltt_block_start_header
)
249 + sizeof(struct ltt_trace_header_0_4
);
251 t
->start_monotonic
= ltt_get_uint64(LTT_GET_BO(tf
),
252 &vheader
->start_monotonic
);
253 t
->start_time
= ltt_get_time(LTT_GET_BO(tf
),
254 &vheader
->start_time
);
259 g_warning("Unsupported trace version : %hhu.%hhu",
260 any
->major_version
, any
->minor_version
);
266 g_warning("Unsupported trace version : %hhu.%hhu",
267 any
->major_version
, any
->minor_version
);
277 /*****************************************************************************
279 * ltt_tracefile_open : open a trace file, construct a LttTracefile
281 * t : the trace containing the tracefile
282 * fileName : path name of the trace file
283 * tf : the tracefile structure
285 * : 0 for success, -1 otherwise.
286 ****************************************************************************/
288 gint
ltt_tracefile_open(LttTrace
*t
, gchar
* fileName
, LttTracefile
*tf
)
290 struct stat lTDFStat
; /* Trace data file status */
291 struct ltt_block_start_header
*header
;
292 int page_size
= getpagesize();
295 tf
->long_name
= g_quark_from_string(fileName
);
297 tf
->fd
= open(fileName
, O_RDONLY
);
299 g_warning("Unable to open input data file %s\n", fileName
);
303 // Get the file's status
304 if(fstat(tf
->fd
, &lTDFStat
) < 0){
305 g_warning("Unable to get the status of the input data file %s\n", fileName
);
309 // Is the file large enough to contain a trace
310 if(lTDFStat
.st_size
<
311 (off_t
)(sizeof(struct ltt_block_start_header
)
312 + sizeof(struct ltt_trace_header_any
))){
313 g_print("The input data file %s does not contain a trace\n", fileName
);
317 /* Temporarily map the buffer start header to get trace information */
318 /* Multiple of pages aligned head */
319 tf
->buffer
.head
= mmap(0,
320 PAGE_ALIGN(sizeof(struct ltt_block_start_header
)
321 + sizeof(struct ltt_trace_header_any
)), PROT_READ
,
322 MAP_PRIVATE
, tf
->fd
, 0);
323 if(tf
->buffer
.head
== MAP_FAILED
) {
324 perror("Error in allocating memory for buffer of tracefile");
327 g_assert( ( (guint
)tf
->buffer
.head
&(8-1) ) == 0); // make sure it's aligned.
329 header
= (struct ltt_block_start_header
*)tf
->buffer
.head
;
331 if(parse_trace_header(header
->trace
, tf
, NULL
)) {
332 g_warning("parse_trace_header error");
336 //store the size of the file
337 tf
->file_size
= lTDFStat
.st_size
;
338 tf
->buf_size
= ltt_get_uint32(LTT_GET_BO(tf
), &header
->buf_size
);
339 tf
->num_blocks
= tf
->file_size
/ tf
->buf_size
;
341 if(munmap(tf
->buffer
.head
,
342 PAGE_ALIGN(sizeof(struct ltt_block_start_header
)
343 + sizeof(struct ltt_trace_header_any
)))) {
344 g_warning("unmap size : %u\n",
345 PAGE_ALIGN(sizeof(struct ltt_block_start_header
)
346 + sizeof(struct ltt_trace_header_any
)));
347 perror("munmap error");
350 tf
->buffer
.head
= NULL
;
352 //read the first block
353 if(map_block(tf
,0)) {
354 perror("Cannot map block for tracefile");
362 if(munmap(tf
->buffer
.head
,
363 PAGE_ALIGN(sizeof(struct ltt_block_start_header
)
364 + sizeof(struct ltt_trace_header_any
)))) {
365 g_warning("unmap size : %u\n",
366 PAGE_ALIGN(sizeof(struct ltt_block_start_header
)
367 + sizeof(struct ltt_trace_header_any
)));
368 perror("munmap error");
377 LttTrace
*ltt_tracefile_get_trace(LttTracefile
*tf
)
383 /*****************************************************************************
384 *Open control and per cpu tracefiles
385 ****************************************************************************/
387 void ltt_tracefile_open_cpu(LttTrace
*t
, gchar
* tracefile_name
)
390 tf
= ltt_tracefile_open(t
,tracefile_name
);
392 t
->per_cpu_tracefile_number
++;
393 g_ptr_array_add(t
->per_cpu_tracefiles
, tf
);
396 gint
ltt_tracefile_open_control(LttTrace
*t
, gchar
* control_name
)
405 tf
= ltt_tracefile_open(t
,control_name
);
407 g_warning("ltt_tracefile_open_control : bad file descriptor");
410 t
->control_tracefile_number
++;
411 g_ptr_array_add(t
->control_tracefiles
,tf
);
413 //parse facilities tracefile to get base_id
414 if(strcmp(&control_name
[strlen(control_name
)-10],"facilities") ==0){
416 if(!ltt_tracefile_read(tf
,&ev
)) return 0; // end of file
418 if(ev
.event_id
== TRACE_FACILITY_LOAD
){
420 fLoad
.name
= (gchar
*)pos
;
421 fLoad
.checksum
= *(LttChecksum
*)(pos
+ strlen(fLoad
.name
));
422 fLoad
.base_code
= *(guint32
*)(pos
+ strlen(fLoad
.name
) + sizeof(LttChecksum
));
424 for(i
=0;i
<t
->facility_number
;i
++){
425 f
= (LttFacility
*)g_ptr_array_index(t
->facilities
,i
);
426 if(strcmp(f
->name
,fLoad
.name
)==0 && fLoad
.checksum
==f
->checksum
){
427 f
->base_id
= fLoad
.base_code
;
431 if(i
==t
->facility_number
) {
432 g_warning("Facility: %s, checksum: %u is not found",
433 fLoad
.name
,(unsigned int)fLoad
.checksum
);
436 }else if(ev
.event_id
== TRACE_BLOCK_START
){
438 }else if(ev
.event_id
== TRACE_BLOCK_END
){
441 g_warning("Not valid facilities trace file");
450 /*****************************************************************************
452 * ltt_tracefile_close: close a trace file,
454 * t : tracefile which will be closed
455 ****************************************************************************/
457 void ltt_tracefile_close(LttTracefile
*t
)
459 int page_size
= getpagesize();
461 if(t
->buffer
.head
!= NULL
)
462 if(munmap(t
->buffer
.head
, PAGE_ALIGN(t
->buf_size
))) {
463 g_warning("unmap size : %u\n",
464 PAGE_ALIGN(t
->buf_size
));
465 perror("munmap error");
473 /*****************************************************************************
474 *Get system information
475 ****************************************************************************/
477 gint
getSystemInfo(LttSystemDescription
* des
, gchar
* pathname
)
484 GMarkupParseContext
* context
;
485 GError
* error
= NULL
;
486 GMarkupParser markup_parser
=
488 parser_start_element
,
491 NULL
, /* passthrough */
495 fd
= g_open(pathname
, O_RDONLY
, 0);
497 g_warning("Can not open file : %s\n", pathname
);
501 iochan
= g_io_channel_unix_new(fd
);
503 context
= g_markup_parse_context_new(&markup_parser
, 0, des
,NULL
);
505 //while(fgets(buf,DIR_NAME_SIZE, fp) != NULL){
506 while(g_io_channel_read_line(iochan
, &buf
, &length
, NULL
, &error
)
507 != G_IO_STATUS_EOF
) {
510 g_warning("Can not read xml file: \n%s\n", error
->message
);
513 if(!g_markup_parse_context_parse(context
, buf
, length
, &error
)){
515 g_warning("Can not parse xml file: \n%s\n", error
->message
);
518 g_markup_parse_context_free(context
);
520 g_io_channel_shutdown(iochan
, FALSE
, &error
); /* No flush */
522 g_warning("Can not close file: \n%s\n", error
->message
);
530 g_markup_parse_context_free(context
);
532 g_io_channel_shutdown(iochan
, FALSE
, &error
); /* No flush */
534 g_warning("Can not close file: \n%s\n", error
->message
);
545 /*****************************************************************************
546 *The following functions get facility/tracefile information
547 ****************************************************************************/
549 gint
getFacilityInfo(LttTrace
*t
, gchar
* eventdefs
)
556 gchar fullname
[DIR_NAME_SIZE
];
557 GError
* error
= NULL
;
559 dir
= g_dir_open(eventdefs
, 0, &error
);
562 g_warning("Can not open directory: %s, %s\n", eventdefs
, error
->message
);
567 while((name
= g_dir_read_name(dir
)) != NULL
){
568 if(!g_pattern_match_simple("*.xml", name
)) continue;
569 strcpy(fullname
,eventdefs
);
570 strcat(fullname
,name
);
571 ltt_facility_open(t
,fullname
);
575 for(j
=0;j
<t
->facility_number
;j
++){
576 f
= (LttFacility
*)g_ptr_array_index(t
->facilities
, j
);
577 for(i
=0; i
<f
->event_number
; i
++){
579 setFieldsOffset(NULL
, et
, NULL
, t
);
586 /*****************************************************************************
587 *A trace is specified as a pathname to the directory containing all the
588 *associated data (control tracefiles, per cpu tracefiles, event
591 *When a trace is closed, all the associated facilities, types and fields
592 *are released as well.
596 /****************************************************************************
597 * get_absolute_pathname
599 * return the unique pathname in the system
601 * MD : Fixed this function so it uses realpath, dealing well with
602 * forgotten cases (.. were not used correctly before).
604 ****************************************************************************/
605 void get_absolute_pathname(const gchar
*pathname
, gchar
* abs_pathname
)
607 abs_pathname
[0] = '\0';
609 if ( realpath (pathname
, abs_pathname
) != NULL
)
613 /* error, return the original path unmodified */
614 strcpy(abs_pathname
, pathname
);
620 /* Search for something like : .*_.*
622 * The left side is the name, the right side is the number.
625 int get_tracefile_name_number(const gchar
*raw_name
,
629 guint raw_name_len
= strlen(raw_name
);
630 gchar char_name
[PATH_MAX
];
636 for(i
=raw_name_len
-1;i
>=0;i
--) {
637 if(raw_name
[i
] == '_') break;
639 if(i
==0) /* Either not found or name length is 0 */
643 cpu_num
= strtol(raw_name
+underscore_pos
+1, &endptr
, 10);
645 if(endptr
== raw_name
+underscore_pos
+1)
646 return -1; /* No digit */
647 if(cpu_num
== LONG_MIN
|| cpu_num
== LONG_MAX
)
648 return -1; /* underflow / overflow */
650 strncpy(char_name
, raw_name
, underscore_pos
);
652 char_name
[underscore_pos
] = '\0';
654 *name
= g_quark_from_string(char_name
);
661 GData
**ltt_trace_get_tracefiles_groups(LttTrace
*trace
)
663 return &trace
->tracefiles
;
667 void compute_tracefile_group(GQuark key_id
,
669 struct compute_tracefile_group_args
*args
)
674 for(i
=0; i
<group
->len
; i
++) {
675 tf
= &g_array_index (group
, LttTracefile
, i
);
677 args
->func(tf
, args
->func_args
);
682 void ltt_tracefile_group_destroy(gpointer data
)
684 GArray
*group
= (GArray
*)data
;
688 for(i
=0; i
<group
->len
; i
++) {
689 tf
= &g_array_index (group
, LttTracefile
, i
);
691 ltt_tracefile_close(tf
);
693 g_array_free(group
, TRUE
);
696 gboolean
ltt_tracefile_group_has_cpu_online(gpointer data
)
698 GArray
*group
= (GArray
*)data
;
702 for(i
=0; i
<group
->len
; i
++) {
703 tf
= &g_array_index (group
, LttTracefile
, i
);
704 if(tf
->cpu_online
) return 1;
710 /* Open each tracefile under a specific directory. Put them in a
711 * GData : permits to access them using their tracefile group pathname.
712 * i.e. access control/modules tracefile group by index :
715 * relative path is the path relative to the trace root
716 * root path is the full path
718 * A tracefile group is simply an array where all the per cpu tracefiles sits.
721 static int open_tracefiles(LttTrace
*trace
, gchar
*root_path
,
722 gchar
*relative_path
)
724 DIR *dir
= opendir(root_path
);
725 struct dirent
*entry
;
726 struct stat stat_buf
;
729 gchar path
[PATH_MAX
];
734 gchar rel_path
[PATH_MAX
];
743 strncpy(path
, root_path
, PATH_MAX
-1);
744 path_len
= strlen(path
);
745 path
[path_len
] = '/';
747 path_ptr
= path
+ path_len
;
749 strncpy(rel_path
, relative_path
, PATH_MAX
-1);
750 rel_path_len
= strlen(rel_path
);
751 rel_path
[rel_path_len
] = '/';
753 rel_path_ptr
= rel_path
+ rel_path_len
;
755 while((entry
= readdir(dir
)) != NULL
) {
757 if(entry
->d_name
[0] == '.') continue;
759 strncpy(path_ptr
, entry
->d_name
, PATH_MAX
- path_len
);
760 strncpy(rel_path_ptr
, entry
->d_name
, PATH_MAX
- rel_path_len
);
762 ret
= stat(path
, &stat_buf
);
768 g_debug("Tracefile file or directory : %s\n", path
);
770 if(strcmp(rel_path
, "/eventdefs") == 0) continue;
772 if(S_ISDIR(stat_buf
.st_mode
)) {
774 g_debug("Entering subdirectory...\n");
775 ret
= open_tracefiles(trace
, path
, rel_path
);
776 if(ret
< 0) continue;
777 } else if(S_ISREG(stat_buf
.st_mode
)) {
782 if(get_tracefile_name_number(rel_path
, &name
, &num
))
783 continue; /* invalid name */
785 g_debug("Opening file.\n");
786 if(ltt_tracefile_open(trace
, path
, &tmp_tf
)) {
787 g_info("Error opening tracefile %s", path
);
789 continue; /* error opening the tracefile : bad magic number ? */
792 g_debug("Tracefile name is %s and number is %u",
793 g_quark_to_string(name
), num
);
795 tmp_tf
.cpu_online
= 1;
796 tmp_tf
.cpu_num
= num
;
799 group
= g_datalist_id_get_data(&trace
->tracefiles
, name
);
801 /* Elements are automatically cleared when the array is allocated.
802 * It makes the cpu_online variable set to 0 : cpu offline, by default.
804 group
= g_array_sized_new (FALSE
, TRUE
, sizeof(LttTracefile
), 10);
805 g_datalist_id_set_data_full(&trace
->tracefiles
, name
,
806 group
, ltt_tracefile_group_destroy
);
809 /* Add the per cpu tracefile to the named group */
810 unsigned int old_len
= group
->len
;
812 group
= g_array_set_size(group
, num
+1);
813 g_array_index (group
, LttTracefile
, num
) = tmp_tf
;
823 /* ltt_get_facility_description
825 * Opens the file corresponding to the requested facility (identified by fac_id
828 * The name searched is : %trace root%/eventdefs/facname_checksum.xml
830 * Returns 0 on success, or 1 on failure.
833 static int ltt_get_facility_description(LttFacility
*f
,
835 LttTracefile
*fac_tf
)
837 char desc_file_name
[PATH_MAX
];
842 text
= g_quark_to_string(t
->pathname
);
843 textlen
= strlen(text
);
845 if(textlen
>= PATH_MAX
) goto name_error
;
846 strcpy(desc_file_name
, text
);
848 text
= "/eventdefs/";
849 textlen
+=strlen(text
);
850 if(textlen
>= PATH_MAX
) goto name_error
;
851 strcat(desc_file_name
, text
);
853 text
= g_quark_to_string(f
->name
);
854 textlen
+=strlen(text
);
855 if(textlen
>= PATH_MAX
) goto name_error
;
856 strcat(desc_file_name
, text
);
859 textlen
+=strlen(text
);
860 if(textlen
>= PATH_MAX
) goto name_error
;
861 strcat(desc_file_name
, text
);
863 err
= snprintf(desc_file_name
+textlen
, PATH_MAX
-textlen
-1,
865 if(err
< 0) goto name_error
;
867 textlen
=strlen(desc_file_name
);
871 textlen
+=strlen(text
);
872 if(textlen
>= PATH_MAX
) goto name_error
;
873 strcat(desc_file_name
, text
);
875 err
= ltt_facility_open(f
, t
, desc_file_name
);
876 if(err
) goto facility_error
;
885 static void ltt_fac_ids_destroy(gpointer data
)
887 GArray
*fac_ids
= (GArray
*)data
;
889 g_array_free(fac_ids
, TRUE
);
893 /* Presumes the tracefile is already seeked at the beginning. It makes sense,
894 * because it must be done just after the opening */
895 static int ltt_process_facility_tracefile(LttTracefile
*tf
)
904 err
= ltt_tracefile_read_seek(tf
);
905 if(err
== EPERM
) goto seek_error
;
906 else if(err
== ERANGE
) break; /* End of tracefile */
908 err
= ltt_tracefile_read_update_event(tf
);
909 if(err
) goto update_error
;
911 /* We are on a facility load/or facility unload/ or heartbeat event */
913 * * facility 0 is hardcoded : this is the core facility. It will be shown
914 * in the facility array though, and is shown as "loaded builtin" in the
916 * It contains event :
918 * 1 : facility unload
919 * 2 : state dump facility load
922 if(tf
->event
.facility_id
!= LTT_FACILITY_CORE
) {
923 /* Should only contain core facility */
924 g_warning("Error in processing facility file %s, "
925 "should not contain facility id %u.", g_quark_to_string(tf
->name
),
926 tf
->event
.facility_id
);
931 struct LttFacilityLoad
*fac_load_data
;
932 struct LttStateDumpFacilityLoad
*fac_state_dump_load_data
;
936 switch((enum ltt_core_events
)tf
->event
.event_id
) {
937 case LTT_EVENT_FACILITY_LOAD
:
938 fac_name
= (char*)(tf
->event
.data
);
939 g_debug("Doing LTT_EVENT_FACILITY_LOAD of facility %s",
942 (struct LttFacilityLoad
*)
943 (tf
->event
.data
+ strlen(fac_name
) + 1);
944 fac
= &g_array_index (tf
->trace
->facilities_by_num
, LttFacility
,
945 ltt_get_uint32(LTT_GET_BO(tf
), &fac_load_data
->id
));
946 g_assert(fac
->exists
== 0);
947 fac
->name
= g_quark_from_string(fac_name
);
948 fac
->checksum
= ltt_get_uint32(LTT_GET_BO(tf
),
949 &fac_load_data
->checksum
);
950 fac
->id
= ltt_get_uint32(LTT_GET_BO(tf
), &fac_load_data
->id
);
951 fac
->pointer_size
= ltt_get_uint32(LTT_GET_BO(tf
),
952 &fac_load_data
->pointer_size
);
953 fac
->long_size
= ltt_get_uint32(LTT_GET_BO(tf
),
954 &fac_load_data
->long_size
);
955 fac
->size_t_size
= ltt_get_uint32(LTT_GET_BO(tf
),
956 &fac_load_data
->size_t_size
);
957 fac
->alignment
= ltt_get_uint32(LTT_GET_BO(tf
),
958 &fac_load_data
->alignment
);
960 if(ltt_get_facility_description(fac
, tf
->trace
, tf
))
961 continue; /* error opening description */
963 fac
->trace
= tf
->trace
;
965 /* Preset the field offsets */
966 for(i
=0; i
<fac
->events
->len
; i
++){
967 et
= &g_array_index(fac
->events
, LttEventType
, i
);
968 set_fields_offsets(tf
, et
);
973 fac_ids
= g_datalist_id_get_data(&tf
->trace
->facilities_by_name
,
975 if(fac_ids
== NULL
) {
976 fac_ids
= g_array_sized_new (FALSE
, TRUE
, sizeof(guint
), 1);
977 g_datalist_id_set_data_full(&tf
->trace
->facilities_by_name
,
979 fac_ids
, ltt_fac_ids_destroy
);
981 g_array_append_val(fac_ids
, fac
->id
);
984 case LTT_EVENT_FACILITY_UNLOAD
:
985 g_debug("Doing LTT_EVENT_FACILITY_UNLOAD");
986 /* We don't care about unload : facilities ID are valid for the whole
987 * trace. They simply won't be used after the unload. */
989 case LTT_EVENT_STATE_DUMP_FACILITY_LOAD
:
990 fac_name
= (char*)(tf
->event
.data
);
991 g_debug("Doing LTT_EVENT_STATE_DUMP_FACILITY_LOAD of facility %s",
993 fac_state_dump_load_data
=
994 (struct LttStateDumpFacilityLoad
*)
995 (tf
->event
.data
+ strlen(fac_name
) + 1);
996 fac
= &g_array_index (tf
->trace
->facilities_by_num
, LttFacility
,
997 ltt_get_uint32(LTT_GET_BO(tf
), &fac_state_dump_load_data
->id
));
998 g_assert(fac
->exists
== 0);
999 fac
->name
= g_quark_from_string(fac_name
);
1000 fac
->checksum
= ltt_get_uint32(LTT_GET_BO(tf
),
1001 &fac_state_dump_load_data
->checksum
);
1002 fac
->id
= fac_state_dump_load_data
->id
;
1003 fac
->pointer_size
= ltt_get_uint32(LTT_GET_BO(tf
),
1004 &fac_state_dump_load_data
->pointer_size
);
1005 fac
->long_size
= ltt_get_uint32(LTT_GET_BO(tf
),
1006 &fac_state_dump_load_data
->long_size
);
1007 fac
->size_t_size
= ltt_get_uint32(LTT_GET_BO(tf
),
1008 &fac_state_dump_load_data
->size_t_size
);
1009 fac
->alignment
= ltt_get_uint32(LTT_GET_BO(tf
),
1010 &fac_state_dump_load_data
->alignment
);
1011 if(ltt_get_facility_description(fac
, tf
->trace
, tf
))
1012 continue; /* error opening description */
1014 fac
->trace
= tf
->trace
;
1016 /* Preset the field offsets */
1017 for(i
=0; i
<fac
->events
->len
; i
++){
1018 et
= &g_array_index(fac
->events
, LttEventType
, i
);
1019 set_fields_offsets(tf
, et
);
1024 fac_ids
= g_datalist_id_get_data(&tf
->trace
->facilities_by_name
,
1026 if(fac_ids
== NULL
) {
1027 fac_ids
= g_array_sized_new (FALSE
, TRUE
, sizeof(guint
), 1);
1028 g_datalist_id_set_data_full(&tf
->trace
->facilities_by_name
,
1030 fac_ids
, ltt_fac_ids_destroy
);
1032 g_array_append_val(fac_ids
, fac
->id
);
1035 case LTT_EVENT_HEARTBEAT
:
1038 g_warning("Error in processing facility file %s, "
1039 "unknown event id %hhu in core facility.",
1040 g_quark_to_string(tf
->name
),
1041 tf
->event
.event_id
);
1043 goto event_id_error
;
1049 /* Error handling */
1054 g_warning("An error occured in facility tracefile parsing");
1059 LttTrace
*ltt_trace_open(const gchar
*pathname
)
1061 gchar abs_path
[PATH_MAX
];
1066 struct ltt_block_start_header
*header
;
1068 struct dirent
*entry
;
1069 guint control_found
= 0;
1070 guint eventdefs_found
= 0;
1071 struct stat stat_buf
;
1072 gchar path
[PATH_MAX
];
1074 t
= g_new(LttTrace
, 1);
1075 if(!t
) goto alloc_error
;
1077 get_absolute_pathname(pathname
, abs_path
);
1078 t
->pathname
= g_quark_from_string(abs_path
);
1080 g_datalist_init(&t
->tracefiles
);
1082 /* Test to see if it looks like a trace */
1083 dir
= opendir(abs_path
);
1088 while((entry
= readdir(dir
)) != NULL
) {
1089 strcpy(path
, abs_path
);
1091 strcat(path
, entry
->d_name
);
1092 ret
= stat(path
, &stat_buf
);
1097 if(S_ISDIR(stat_buf
.st_mode
)) {
1098 if(strcmp(entry
->d_name
, "control") == 0) {
1101 if(strcmp(entry
->d_name
, "eventdefs") == 0) {
1102 eventdefs_found
= 1;
1108 if(!control_found
|| !eventdefs_found
) goto find_error
;
1110 /* Open all the tracefiles */
1111 if(open_tracefiles(t
, abs_path
, "")) {
1112 g_warning("Error opening tracefile %s", abs_path
);
1116 /* Prepare the facilities containers : array and mapping */
1117 /* Array is zeroed : the "exists" field is set to false by default */
1118 t
->facilities_by_num
= g_array_sized_new (FALSE
,
1119 TRUE
, sizeof(LttFacility
),
1121 t
->facilities_by_num
= g_array_set_size(t
->facilities_by_num
, NUM_FACILITIES
);
1123 g_datalist_init(&t
->facilities_by_name
);
1125 /* Parse each trace control/facilitiesN files : get runtime fac. info */
1126 group
= g_datalist_id_get_data(&t
->tracefiles
, LTT_TRACEFILE_NAME_FACILITIES
);
1128 g_error("Trace %s has no facility tracefile", abs_path
);
1130 goto facilities_error
;
1133 /* Get the trace information for the control/facility 0 tracefile */
1134 g_assert(group
->len
> 0);
1135 tf
= &g_array_index (group
, LttTracefile
, 0);
1136 header
= (struct ltt_block_start_header
*)tf
->buffer
.head
;
1137 g_assert(parse_trace_header(header
->trace
,
1140 t
->num_cpu
= group
->len
;
1142 for(i
=0; i
<group
->len
; i
++) {
1143 tf
= &g_array_index (group
, LttTracefile
, i
);
1144 if(ltt_process_facility_tracefile(tf
))
1145 goto facilities_error
;
1150 /* Error handling */
1152 g_datalist_clear(&t
->facilities_by_name
);
1153 g_array_free(t
->facilities_by_num
, TRUE
);
1155 g_datalist_clear(&t
->tracefiles
);
1163 GQuark
ltt_trace_name(const LttTrace
*t
)
1169 /******************************************************************************
1170 * When we copy a trace, we want all the opening actions to happen again :
1171 * the trace will be reopened and totally independant from the original.
1172 * That's why we call ltt_trace_open.
1173 *****************************************************************************/
1174 LttTrace
*ltt_trace_copy(LttTrace
*self
)
1176 return ltt_trace_open(g_quark_to_string(self
->pathname
));
1179 void ltt_trace_close(LttTrace
*t
)
1184 for(i
=0; i
<t
->facilities_by_num
->len
; i
++) {
1185 fac
= &g_array_index (t
->facilities_by_num
, LttFacility
, i
);
1187 ltt_facility_close(fac
);
1190 g_datalist_clear(&t
->facilities_by_name
);
1191 g_array_free(t
->facilities_by_num
, TRUE
);
1192 g_datalist_clear(&t
->tracefiles
);
1197 /*****************************************************************************
1198 *Get the system description of the trace
1199 ****************************************************************************/
1201 LttFacility
*ltt_trace_facility_by_id(LttTrace
*t
, guint8 id
)
1203 g_assert(id
< t
->facilities_by_num
->len
);
1204 return &g_array_index(t
->facilities_by_num
, LttFacility
, id
);
1207 /* ltt_trace_facility_get_by_name
1209 * Returns the GArray of facility indexes. All the fac_ids that matches the
1210 * requested facility name.
1212 * If name is not found, returns NULL.
1214 GArray
*ltt_trace_facility_get_by_name(LttTrace
*t
, GQuark name
)
1216 return g_datalist_id_get_data(&t
->facilities_by_name
, name
);
1219 /*****************************************************************************
1220 * Functions to discover all the event types in the trace
1221 ****************************************************************************/
1224 unsigned ltt_trace_eventtype_number(LttTrace
*t
)
1228 unsigned int num
= t
->facility_number
;
1232 f
= (LttFacility
*)g_ptr_array_index(t
->facilities
, i
);
1233 count
+= f
->event_number
;
1240 //use an iteration on all the trace facilities, and inside iteration on all the
1241 //event types in each facilities instead.
1242 LttEventType
*ltt_trace_eventtype_get(LttTrace
*t
, unsigned evId
)
1244 LttEventType
*event_type
;
1247 f
= ltt_trace_facility_by_id(t
,evId
);
1249 if(unlikely(!f
)) event_type
= NULL
;
1250 else event_type
= f
->events
[evId
- f
->base_id
];
1257 /*****************************************************************************
1258 * ltt_trace_find_tracefile
1260 * Find a tracefile by name and index in the group.
1262 * Returns a pointer to the tracefiles, else NULL.
1263 ****************************************************************************/
1265 LttTracefile
*ltt_trace_find_tracefile(LttTrace
*t
, const gchar
*name
)
1270 /*****************************************************************************
1271 * Get the start time and end time of the trace
1272 ****************************************************************************/
1274 static void ltt_tracefile_time_span_get(LttTracefile
*tf
,
1275 LttTime
*start
, LttTime
*end
)
1279 err
= map_block(tf
, 0);
1281 g_error("Can not map block");
1282 *start
= ltt_time_infinite
;
1284 *start
= tf
->buffer
.begin
.timestamp
;
1286 err
= map_block(tf
, tf
->num_blocks
- 1); /* Last block */
1288 g_error("Can not map block");
1289 *end
= ltt_time_zero
;
1291 *end
= tf
->buffer
.end
.timestamp
;
1294 struct tracefile_time_span_get_args
{
1300 static void group_time_span_get(GQuark name
, gpointer data
, gpointer user_data
)
1302 struct tracefile_time_span_get_args
*args
=
1303 (struct tracefile_time_span_get_args
*)user_data
;
1305 GArray
*group
= (GArray
*)data
;
1311 for(i
=0; i
<group
->len
; i
++) {
1312 tf
= &g_array_index (group
, LttTracefile
, i
);
1313 if(tf
->cpu_online
) {
1314 ltt_tracefile_time_span_get(tf
, &tmp_start
, &tmp_end
);
1315 if(ltt_time_compare(*args
->start
, tmp_start
)>0) *args
->start
= tmp_start
;
1316 if(ltt_time_compare(*args
->end
, tmp_end
)<0) *args
->end
= tmp_end
;
1321 void ltt_trace_time_span_get(LttTrace
*t
, LttTime
*start
, LttTime
*end
)
1323 LttTime min_start
= ltt_time_infinite
;
1324 LttTime max_end
= ltt_time_zero
;
1325 struct tracefile_time_span_get_args args
= { t
, &min_start
, &max_end
};
1327 g_datalist_foreach(&t
->tracefiles
, &group_time_span_get
, &args
);
1329 if(start
!= NULL
) *start
= min_start
;
1330 if(end
!= NULL
) *end
= max_end
;
1335 /*****************************************************************************
1336 *Get the name of a tracefile
1337 ****************************************************************************/
1339 GQuark
ltt_tracefile_name(const LttTracefile
*tf
)
1344 GQuark
ltt_tracefile_long_name(const LttTracefile
*tf
)
1346 return tf
->long_name
;
1351 guint
ltt_tracefile_num(LttTracefile
*tf
)
1356 /*****************************************************************************
1357 * Get the number of blocks in the tracefile
1358 ****************************************************************************/
1360 guint
ltt_tracefile_block_number(LttTracefile
*tf
)
1362 return tf
->num_blocks
;
1366 /* Seek to the first event in a tracefile that has a time equal or greater than
1367 * the time passed in parameter.
1369 * If the time parameter is outside the tracefile time span, seek to the first
1370 * event or if after, return ERANGE.
1372 * If the time parameter is before the first event, we have to seek specially to
1375 * If the time is after the end of the trace, return ERANGE.
1377 * Do a binary search to find the right block, then a sequential search in the
1378 * block to find the event.
1380 * In the special case where the time requested fits inside a block that has no
1381 * event corresponding to the requested time, the first event of the next block
1384 * IMPORTANT NOTE : // FIXME everywhere...
1386 * You MUST NOT do a ltt_tracefile_read right after a ltt_tracefile_seek_time :
1387 * you will jump over an event if you do.
1389 * Return value : 0 : no error, the tf->event can be used
1390 * ERANGE : time if after the last event of the trace
1391 * otherwise : this is an error.
1395 int ltt_tracefile_seek_time(LttTracefile
*tf
, LttTime time
)
1399 unsigned int block_num
, high
, low
;
1401 /* seek at the beginning of trace */
1402 err
= map_block(tf
, 0); /* First block */
1404 g_error("Can not map block");
1408 /* If the time is lower or equal the beginning of the trace,
1409 * go to the first event. */
1410 if(ltt_time_compare(time
, tf
->buffer
.begin
.timestamp
) <= 0) {
1411 ret
= ltt_tracefile_read(tf
);
1412 if(ret
== ERANGE
) goto range
;
1413 else if (ret
) goto fail
;
1414 goto found
; /* There is either no event in the trace or the event points
1415 to the first event in the trace */
1418 err
= map_block(tf
, tf
->num_blocks
- 1); /* Last block */
1420 g_error("Can not map block");
1424 /* If the time is after the end of the trace, return ERANGE. */
1425 if(ltt_time_compare(time
, tf
->buffer
.end
.timestamp
) > 0) {
1429 /* Binary search the block */
1430 high
= tf
->num_blocks
- 1;
1434 block_num
= ((high
-low
) / 2) + low
;
1436 err
= map_block(tf
, block_num
);
1438 g_error("Can not map block");
1442 /* We cannot divide anymore : this is what would happen if the time
1443 * requested was exactly between two consecutive buffers'end and start
1444 * timestamps. This is also what would happend if we didn't deal with out
1445 * of span cases prior in this function. */
1446 /* The event is right in the buffer!
1447 * (or in the next buffer first event) */
1449 ret
= ltt_tracefile_read(tf
);
1450 if(ret
== ERANGE
) goto range
; /* ERANGE or EPERM */
1451 else if(ret
) goto fail
;
1453 if(ltt_time_compare(time
, tf
->event
.event_time
) <= 0)
1457 } else if(ltt_time_compare(time
, tf
->buffer
.begin
.timestamp
) < 0) {
1458 /* go to lower part */
1459 high
= block_num
- 1;
1460 } else if(ltt_time_compare(time
, tf
->buffer
.end
.timestamp
) > 0) {
1461 /* go to higher part */
1462 low
= block_num
+ 1;
1463 } else {/* The event is right in the buffer!
1464 (or in the next buffer first event) */
1466 ret
= ltt_tracefile_read(tf
);
1467 if(ret
== ERANGE
) goto range
; /* ERANGE or EPERM */
1468 else if(ret
) goto fail
;
1470 if(ltt_time_compare(time
, tf
->event
.event_time
) <= 0)
1482 /* Error handling */
1484 g_error("ltt_tracefile_seek_time failed on tracefile %s",
1485 g_quark_to_string(tf
->name
));
1490 int ltt_tracefile_seek_position(LttTracefile
*tf
, const LttEventPosition
*ep
) {
1494 if(ep
->tracefile
!= tf
) {
1498 err
= map_block(tf
, ep
->block
);
1500 g_error("Can not map block");
1504 tf
->event
.offset
= ep
->offset
;
1506 err
= ltt_tracefile_read_update_event(tf
);
1508 err
= ltt_tracefile_read_op(tf
);
1514 g_error("ltt_tracefile_seek_time failed on tracefile %s",
1515 g_quark_to_string(tf
->name
));
1519 /* Calculate the real event time based on the buffer boundaries */
1520 LttTime
ltt_interpolate_time(LttTracefile
*tf
, LttEvent
*event
)
1524 g_assert(tf
->trace
->has_tsc
);
1526 time
= ltt_time_from_uint64(
1527 (guint64
)(tf
->buffer
.tsc
- tf
->buffer
.begin
.cycle_count
) *
1528 tf
->buffer
.nsecs_per_cycle
);
1529 time
= ltt_time_add(tf
->buffer
.begin
.timestamp
, time
);
1535 /* Get the current event of the tracefile : valid until the next read */
1536 LttEvent
*ltt_tracefile_get_event(LttTracefile
*tf
)
1543 /*****************************************************************************
1545 * ltt_tracefile_read : Read the next event in the tracefile
1550 * Returns 0 if an event can be used in tf->event.
1551 * Returns ERANGE on end of trace. The event in tf->event still can be used
1552 * (if the last block was not empty).
1553 * Returns EPERM on error.
1555 * This function does make the tracefile event structure point to the event
1556 * currently pointed to by the tf->event.
1558 * Note : you must call a ltt_tracefile_seek to the beginning of the trace to
1559 * reinitialize it after an error if you want results to be coherent.
1560 * It would be the case if a end of trace last buffer has no event : the end
1561 * of trace wouldn't be returned, but an error.
1562 * We make the assumption there is at least one event per buffer.
1563 ****************************************************************************/
1565 int ltt_tracefile_read(LttTracefile
*tf
)
1569 err
= ltt_tracefile_read_seek(tf
);
1571 err
= ltt_tracefile_read_update_event(tf
);
1573 err
= ltt_tracefile_read_op(tf
);
1579 int ltt_tracefile_read_seek(LttTracefile
*tf
)
1583 /* Get next buffer until we finally have an event, or end of trace */
1585 err
= ltt_seek_next_event(tf
);
1586 if(unlikely(err
== ENOPROTOOPT
)) {
1590 /* Are we at the end of the buffer ? */
1592 if(unlikely(tf
->buffer
.index
== tf
->num_blocks
-1)){ /* end of trace ? */
1595 /* get next block */
1596 err
= map_block(tf
, tf
->buffer
.index
+ 1);
1598 g_error("Can not map block");
1602 } else break; /* We found an event ! */
1609 /* do specific operation on events */
1610 int ltt_tracefile_read_op(LttTracefile
*tf
)
1616 /* do event specific operation */
1618 /* do something if its an heartbeat event : increment the heartbeat count */
1619 //if(event->facility_id == LTT_FACILITY_CORE)
1620 // if(event->event_id == LTT_EVENT_HEARTBEAT)
1621 // tf->cur_heart_beat_number++;
1627 /* same as ltt_tracefile_read, but does not seek to the next event nor call
1628 * event specific operation. */
1629 int ltt_tracefile_read_update_event(LttTracefile
*tf
)
1635 pos
= tf
->buffer
.head
+ event
->offset
;
1637 /* Read event header */
1641 if(tf
->trace
->has_tsc
) {
1642 if(tf
->trace
->has_heartbeat
) {
1643 event
->time
.timestamp
= ltt_get_uint32(LTT_GET_BO(tf
),
1645 /* 32 bits -> 64 bits tsc */
1646 /* note : still works for seek and non seek cases. */
1647 if(event
->time
.timestamp
< (0xFFFFFFFFULL
&tf
->buffer
.tsc
)) {
1648 tf
->buffer
.tsc
= ((tf
->buffer
.tsc
&0xFFFFFFFF00000000ULL
)
1650 | (guint64
)event
->time
.timestamp
;
1651 event
->tsc
= tf
->buffer
.tsc
;
1654 tf
->buffer
.tsc
= (tf
->buffer
.tsc
&0xFFFFFFFF00000000ULL
)
1655 | (guint64
)event
->time
.timestamp
;
1656 event
->tsc
= tf
->buffer
.tsc
;
1658 pos
+= sizeof(guint32
);
1660 event
->tsc
= ltt_get_uint64(LTT_GET_BO(tf
), pos
);
1661 tf
->buffer
.tsc
= event
->tsc
;
1662 pos
+= sizeof(guint64
);
1665 event
->event_time
= ltt_interpolate_time(tf
, event
);
1667 event
->time
.delta
.tv_sec
= 0;
1668 event
->time
.delta
.tv_nsec
= ltt_get_uint32(LTT_GET_BO(tf
),
1669 pos
) * NSEC_PER_USEC
;
1671 event
->tsc
= tf
->buffer
.tsc
;
1673 event
->event_time
= ltt_time_add(tf
->buffer
.begin
.timestamp
,
1675 pos
+= sizeof(guint32
);
1678 event
->facility_id
= *(guint8
*)pos
;
1679 pos
+= sizeof(guint8
);
1681 event
->event_id
= *(guint8
*)pos
;
1682 pos
+= sizeof(guint8
);
1684 event
->event_size
= ltt_get_uint16(LTT_GET_BO(tf
), pos
);
1685 pos
+= sizeof(guint16
);
1689 /* get the data size and update the event fields with the current
1691 ltt_update_event_size(tf
);
1697 /****************************************************************************
1699 * map_block : map a block from the file
1701 * lttdes : ltt trace file
1702 * whichBlock : the block which will be read
1705 * EINVAL : lseek fail
1706 * EIO : can not read from the file
1707 ****************************************************************************/
1709 static gint
map_block(LttTracefile
* tf
, guint block_num
)
1711 int page_size
= getpagesize();
1712 struct ltt_block_start_header
*header
;
1714 g_assert(block_num
< tf
->num_blocks
);
1716 if(tf
->buffer
.head
!= NULL
) {
1717 if(munmap(tf
->buffer
.head
, PAGE_ALIGN(tf
->buf_size
))) {
1718 g_warning("unmap size : %u\n",
1719 PAGE_ALIGN(tf
->buf_size
));
1720 perror("munmap error");
1726 /* Multiple of pages aligned head */
1727 tf
->buffer
.head
= mmap(0,
1728 PAGE_ALIGN(tf
->buf_size
),
1729 PROT_READ
, MAP_PRIVATE
, tf
->fd
,
1730 PAGE_ALIGN((off_t
)tf
->buf_size
* (off_t
)block_num
));
1732 if(tf
->buffer
.head
== MAP_FAILED
) {
1733 perror("Error in allocating memory for buffer of tracefile");
1737 g_assert( ( (guint
)tf
->buffer
.head
&(8-1) ) == 0); // make sure it's aligned.
1740 tf
->buffer
.index
= block_num
;
1742 header
= (struct ltt_block_start_header
*)tf
->buffer
.head
;
1744 tf
->buffer
.begin
.timestamp
= ltt_time_add(
1745 ltt_time_from_uint64(
1746 ltt_get_uint64(LTT_GET_BO(tf
),
1747 &header
->begin
.timestamp
)
1748 - tf
->trace
->start_monotonic
),
1749 tf
->trace
->start_time
);
1750 //g_debug("block %u begin : %lu.%lu", block_num,
1751 // tf->buffer.begin.timestamp.tv_sec, tf->buffer.begin.timestamp.tv_nsec);
1752 tf
->buffer
.begin
.cycle_count
= ltt_get_uint64(LTT_GET_BO(tf
),
1753 &header
->begin
.cycle_count
);
1754 tf
->buffer
.begin
.freq
= ltt_get_uint64(LTT_GET_BO(tf
),
1755 &header
->begin
.freq
);
1756 tf
->buffer
.end
.timestamp
= ltt_time_add(
1757 ltt_time_from_uint64(
1758 ltt_get_uint64(LTT_GET_BO(tf
),
1759 &header
->end
.timestamp
)
1760 - tf
->trace
->start_monotonic
),
1761 tf
->trace
->start_time
);
1763 //g_debug("block %u end : %lu.%lu", block_num,
1764 // tf->buffer.end.timestamp.tv_sec, tf->buffer.end.timestamp.tv_nsec);
1765 tf
->buffer
.end
.cycle_count
= ltt_get_uint64(LTT_GET_BO(tf
),
1766 &header
->end
.cycle_count
);
1767 tf
->buffer
.end
.freq
= ltt_get_uint64(LTT_GET_BO(tf
),
1769 tf
->buffer
.lost_size
= ltt_get_uint32(LTT_GET_BO(tf
),
1770 &header
->lost_size
);
1772 tf
->buffer
.tsc
= tf
->buffer
.begin
.cycle_count
;
1773 tf
->event
.tsc
= tf
->buffer
.tsc
;
1774 tf
->buffer
.freq
= tf
->buffer
.begin
.freq
;
1777 * eventually support variable buffer size : will need a partial pre-read of
1778 * the headers to create an index when we open the trace... eventually. */
1779 g_assert(tf
->buf_size
== ltt_get_uint32(LTT_GET_BO(tf
),
1780 &header
->buf_size
));
1782 /* Now that the buffer is mapped, calculate the time interpolation for the
1785 tf
->buffer
.nsecs_per_cycle
= calc_nsecs_per_cycle(tf
);
1787 /* Make the current event point to the beginning of the buffer :
1788 * it means that the event read must get the first event. */
1789 tf
->event
.tracefile
= tf
;
1790 tf
->event
.block
= block_num
;
1791 tf
->event
.offset
= 0;
1800 /* It will update the fields offsets too */
1801 void ltt_update_event_size(LttTracefile
*tf
)
1805 /* Specific handling of core events : necessary to read the facility control
1807 LttFacility
*f
= ltt_trace_get_facility_by_num(tf
->trace
,
1808 tf
->event
.facility_id
);
1810 if(likely(tf
->event
.facility_id
== LTT_FACILITY_CORE
)) {
1811 switch((enum ltt_core_events
)tf
->event
.event_id
) {
1812 case LTT_EVENT_FACILITY_LOAD
:
1813 size
= strlen((char*)tf
->event
.data
) + 1;
1814 //g_debug("Update Event facility load of facility %s", (char*)tf->event.data);
1815 size
+= sizeof(struct LttFacilityLoad
);
1817 case LTT_EVENT_FACILITY_UNLOAD
:
1818 //g_debug("Update Event facility unload");
1819 size
= sizeof(struct LttFacilityUnload
);
1821 case LTT_EVENT_STATE_DUMP_FACILITY_LOAD
:
1822 size
= strlen((char*)tf
->event
.data
) + 1;
1823 //g_debug("Update Event facility load state dump of facility %s",
1824 // (char*)tf->event.data);
1825 size
+= sizeof(struct LttStateDumpFacilityLoad
);
1827 case LTT_EVENT_HEARTBEAT
:
1828 //g_debug("Update Event heartbeat");
1829 size
= sizeof(TimeHeartbeat
);
1832 g_warning("Error in getting event size : tracefile %s, "
1833 "unknown event id %hhu in core facility.",
1834 g_quark_to_string(tf
->name
),
1835 tf
->event
.event_id
);
1836 goto event_id_error
;
1841 g_error("Unknown facility %hhu (0x%hhx) in tracefile %s",
1842 tf
->event
.facility_id
,
1843 tf
->event
.facility_id
,
1844 g_quark_to_string(tf
->name
));
1845 goto facility_error
;
1848 LttEventType
*event_type
=
1849 ltt_facility_eventtype_get(f
, tf
->event
.event_id
);
1852 g_error("Unknown event id %hhu in facility %s in tracefile %s",
1854 g_quark_to_string(f
->name
),
1855 g_quark_to_string(tf
->name
));
1856 goto event_type_error
;
1859 if(event_type
->root_field
)
1860 size
= get_field_type_size(tf
, event_type
,
1861 0, 0, event_type
->root_field
, tf
->event
.data
);
1865 //g_debug("Event root field : f.e %hhu.%hhu size %zd",
1866 // tf->event.facility_id,
1867 // tf->event.event_id, size);
1870 tf
->event
.data_size
= size
;
1872 /* Check consistency between kernel and LTTV structure sizes */
1873 g_assert(tf
->event
.data_size
== tf
->event
.event_size
);
1880 tf
->event
.data_size
= 0;
1884 /* Take the tf current event offset and use the event facility id and event id
1885 * to figure out where is the next event offset.
1887 * This is an internal function not aiming at being used elsewhere : it will
1888 * not jump over the current block limits. Please consider using
1889 * ltt_tracefile_read to do this.
1891 * Returns 0 on success
1892 * ERANGE if we are at the end of the buffer.
1893 * ENOPROTOOPT if an error occured when getting the current event size.
1895 static int ltt_seek_next_event(LttTracefile
*tf
)
1900 /* seek over the buffer header if we are at the buffer start */
1901 if(tf
->event
.offset
== 0) {
1902 tf
->event
.offset
+= tf
->buffer_header_size
;
1904 if(tf
->event
.offset
== tf
->buf_size
- tf
->buffer
.lost_size
) {
1911 pos
= tf
->event
.data
;
1913 if(tf
->event
.data_size
< 0) goto error
;
1915 pos
+= (size_t)tf
->event
.data_size
;
1917 tf
->event
.offset
= pos
- tf
->buffer
.head
;
1919 if(tf
->event
.offset
== tf
->buf_size
- tf
->buffer
.lost_size
) {
1923 g_assert(tf
->event
.offset
< tf
->buf_size
- tf
->buffer
.lost_size
);
1929 g_error("Error in ltt_seek_next_event for tracefile %s",
1930 g_quark_to_string(tf
->name
));
1935 /*****************************************************************************
1937 * calc_nsecs_per_cycle : calculate nsecs per cycle for current block
1939 * 1.0 / (freq(khz) *1000) * 1000000000
1942 ****************************************************************************/
1943 /* from timer_tsc.c */
1944 #define CYC2NS_SCALE_FACTOR 10
1945 static double calc_nsecs_per_cycle(LttTracefile
* tf
)
1947 //return 1e6 / (double)tf->buffer.freq;
1948 guint64 cpu_mhz
= tf
->buffer
.freq
/ 1000;
1949 guint64 cyc2ns_scale
= (1000 << CYC2NS_SCALE_FACTOR
)/cpu_mhz
;
1951 return cyc2ns_scale
>> CYC2NS_SCALE_FACTOR
;
1952 // return 1e6 / (double)tf->buffer.freq;
1955 void setFieldsOffset(LttTracefile
*tf
, LttEventType
*evT
,void *evD
)
1957 LttField
* rootFld
= evT
->root_field
;
1958 // rootFld->base_address = evD;
1961 rootFld
->field_size
= getFieldtypeSize(tf
, evT
->facility
,
1962 evT
, 0,0,rootFld
, evD
);
1966 /*****************************************************************************
1968 * set_fields_offsets : set the precomputable offset of the fields
1970 * tracefile : opened trace file
1971 * event_type : the event type
1972 ****************************************************************************/
1974 void set_fields_offsets(LttTracefile
*tf
, LttEventType
*event_type
)
1976 LttField
*field
= event_type
->root_field
;
1977 enum field_status fixed_root
= FIELD_FIXED
, fixed_parent
= FIELD_FIXED
;
1980 preset_field_type_size(tf
, event_type
, 0, 0,
1981 &fixed_root
, &fixed_parent
,
1987 /*****************************************************************************
1989 * preset_field_type_size : set the fixed sizes of the field type
1992 * event_type : event type
1993 * offset_root : offset from the root
1994 * offset_parent : offset from the parent
1995 * fixed_root : Do we know a fixed offset to the root ?
1996 * fixed_parent : Do we know a fixed offset to the parent ?
1998 ****************************************************************************/
1999 void preset_field_type_size(LttTracefile
*tf
, LttEventType
*event_type
,
2000 off_t offset_root
, off_t offset_parent
,
2001 enum field_status
*fixed_root
, enum field_status
*fixed_parent
,
2004 enum field_status local_fixed_root
, local_fixed_parent
;
2008 g_assert(field
->fixed_root
== FIELD_UNKNOWN
);
2009 g_assert(field
->fixed_parent
== FIELD_UNKNOWN
);
2010 g_assert(field
->fixed_size
== FIELD_UNKNOWN
);
2012 type
= field
->field_type
;
2014 field
->fixed_root
= *fixed_root
;
2015 if(field
->fixed_root
== FIELD_FIXED
)
2016 field
->offset_root
= offset_root
;
2018 field
->offset_root
= 0;
2020 field
->fixed_parent
= *fixed_parent
;
2021 if(field
->fixed_parent
== FIELD_FIXED
)
2022 field
->offset_parent
= offset_parent
;
2024 field
->offset_parent
= 0;
2026 size_t current_root_offset
;
2027 size_t current_offset
;
2028 enum field_status current_child_status
, final_child_status
;
2031 switch(type
->type_class
) {
2036 field
->field_size
= ltt_type_size(tf
->trace
, type
);
2037 field
->fixed_size
= FIELD_FIXED
;
2040 field
->field_size
= (off_t
)event_type
->facility
->pointer_size
;
2041 field
->fixed_size
= FIELD_FIXED
;
2045 field
->field_size
= (off_t
)event_type
->facility
->long_size
;
2046 field
->fixed_size
= FIELD_FIXED
;
2051 field
->field_size
= (off_t
)event_type
->facility
->size_t_size
;
2052 field
->fixed_size
= FIELD_FIXED
;
2055 local_fixed_root
= FIELD_VARIABLE
;
2056 local_fixed_parent
= FIELD_VARIABLE
;
2057 preset_field_type_size(tf
, event_type
,
2059 &local_fixed_root
, &local_fixed_parent
,
2061 field
->fixed_size
= FIELD_VARIABLE
;
2062 field
->field_size
= 0;
2063 *fixed_root
= FIELD_VARIABLE
;
2064 *fixed_parent
= FIELD_VARIABLE
;
2067 field
->fixed_size
= FIELD_VARIABLE
;
2068 field
->field_size
= 0;
2069 *fixed_root
= FIELD_VARIABLE
;
2070 *fixed_parent
= FIELD_VARIABLE
;
2073 local_fixed_root
= FIELD_VARIABLE
;
2074 local_fixed_parent
= FIELD_VARIABLE
;
2075 preset_field_type_size(tf
, event_type
,
2077 &local_fixed_root
, &local_fixed_parent
,
2079 field
->fixed_size
= field
->child
[0]->fixed_size
;
2080 if(field
->fixed_size
== FIELD_FIXED
) {
2081 field
->field_size
= type
->element_number
* field
->child
[0]->field_size
;
2083 field
->field_size
= 0;
2084 *fixed_root
= FIELD_VARIABLE
;
2085 *fixed_parent
= FIELD_VARIABLE
;
2089 current_root_offset
= field
->offset_root
;
2091 current_child_status
= FIELD_FIXED
;
2092 for(i
=0;i
<type
->element_number
;i
++) {
2093 preset_field_type_size(tf
, event_type
,
2094 current_root_offset
, current_offset
,
2095 fixed_root
, ¤t_child_status
,
2097 if(current_child_status
== FIELD_FIXED
) {
2098 current_root_offset
+= field
->child
[i
]->field_size
;
2099 current_offset
+= field
->child
[i
]->field_size
;
2101 current_root_offset
= 0;
2105 if(current_child_status
!= FIELD_FIXED
) {
2106 *fixed_parent
= current_child_status
;
2107 field
->field_size
= 0;
2108 field
->fixed_size
= current_child_status
;
2110 field
->field_size
= current_offset
;
2111 field
->fixed_size
= FIELD_FIXED
;
2115 current_root_offset
= field
->offset_root
;
2118 final_child_status
= FIELD_FIXED
;
2119 for(i
=0;i
<type
->element_number
;i
++) {
2120 enum field_status current_root_child_status
= FIELD_FIXED
;
2121 enum field_status current_child_status
= FIELD_FIXED
;
2122 preset_field_type_size(tf
, event_type
,
2123 current_root_offset
, current_offset
,
2124 ¤t_root_child_status
, ¤t_child_status
,
2126 if(current_child_status
!= FIELD_FIXED
)
2127 final_child_status
= current_child_status
;
2129 max_size
= max(max_size
, field
->child
[i
]->field_size
);
2131 if(final_child_status
!= FIELD_FIXED
) {
2132 *fixed_root
= final_child_status
;
2133 *fixed_parent
= final_child_status
;
2134 field
->field_size
= 0;
2135 field
->fixed_size
= current_child_status
;
2137 field
->field_size
= max_size
;
2138 field
->fixed_size
= FIELD_FIXED
;
2146 /*****************************************************************************
2148 * check_fields_compatibility : Check for compatibility between two fields :
2149 * do they use the same inner structure ?
2151 * event_type1 : event type
2152 * event_type2 : event type
2155 *Returns : 0 if identical
2157 ****************************************************************************/
2158 gint
check_fields_compatibility(LttEventType
*event_type1
,
2159 LttEventType
*event_type2
,
2160 LttField
*field1
, LttField
*field2
)
2162 guint different
= 0;
2167 if(field1
== NULL
) {
2168 if(field2
== NULL
) goto end
;
2173 } else if(field2
== NULL
) {
2178 g_assert(field1
->fixed_root
!= FIELD_UNKNOWN
);
2179 g_assert(field2
->fixed_root
!= FIELD_UNKNOWN
);
2180 g_assert(field1
->fixed_parent
!= FIELD_UNKNOWN
);
2181 g_assert(field2
->fixed_parent
!= FIELD_UNKNOWN
);
2182 g_assert(field1
->fixed_size
!= FIELD_UNKNOWN
);
2183 g_assert(field2
->fixed_size
!= FIELD_UNKNOWN
);
2185 type1
= field1
->field_type
;
2186 type2
= field2
->field_type
;
2188 if(type1
->type_class
!= type2
->type_class
) {
2192 if(type1
->element_name
!= type2
->element_name
) {
2197 switch(type1
->type_class
) {
2207 if(field1
->field_size
!= field2
->field_size
) {
2213 if(type1
->element_number
!= type2
->element_number
) {
2217 for(i
=0;i
<type1
->element_number
;i
++) {
2218 if(type1
->enum_strings
[i
] != type2
->enum_strings
[i
]) {
2225 /* Two elements : size and child */
2226 g_assert(type1
->element_number
!= type2
->element_number
);
2227 for(i
=0;i
<type1
->element_number
;i
++) {
2228 if(check_fields_compatibility(event_type1
, event_type2
,
2229 field1
->child
[0], field2
->child
[0])) {
2238 if(field1
->field_size
!= field2
->field_size
) {
2242 /* Two elements : size and child */
2243 g_assert(type1
->element_number
!= type2
->element_number
);
2244 for(i
=0;i
<type1
->element_number
;i
++) {
2245 if(check_fields_compatibility(event_type1
, event_type2
,
2246 field1
->child
[0], field2
->child
[0])) {
2254 if(type1
->element_number
!= type2
->element_number
) {
2258 for(i
=0;i
<type1
->element_number
;i
++) {
2259 if(check_fields_compatibility(event_type1
, event_type2
,
2260 field1
->child
[0], field2
->child
[0])) {
2275 /*****************************************************************************
2277 * getFieldtypeSize: get the size of the field type (primitive type)
2280 * offsetRoot : offset from the root
2281 * offsetParent : offset from the parrent
2283 * evD : event data, it may be NULL
2285 * int : size of the field
2286 ****************************************************************************/
2288 static inline gint
getFieldtypeSize(LttTracefile
*tf
,
2289 LttEventType
* evT
, gint offsetRoot
,
2290 gint offsetParent
, LttField
* fld
, void *evD
)
2292 gint size
, size1
, element_number
, i
, offset1
, offset2
;
2293 LttType
* type
= fld
->field_type
;
2295 /* This likely has been tested with gcov : half of them.. */
2296 if(unlikely(fld
->field_fixed
== 1)){
2298 if(unlikely(fld
== evT
->root_field
)) {
2299 size
= fld
->field_size
;
2300 goto end_getFieldtypeSize
;
2304 /* From gcov profiling : half string, half struct, can we gain something
2305 * from that ? (Mathieu) */
2306 switch(type
->type_class
) {
2308 element_number
= (int) type
->element_number
;
2309 if(fld
->field_fixed
== -1){
2310 size
= getFieldtypeSize(tf
, evT
, offsetRoot
,
2311 0,fld
->child
[0], NULL
);
2312 if(size
== 0){ //has string or sequence
2313 fld
->field_fixed
= 0;
2315 fld
->field_fixed
= 1;
2316 size
*= element_number
;
2318 }else if(fld
->field_fixed
== 0){// has string or sequence
2320 for(i
=0;i
<element_number
;i
++){
2321 size
+= getFieldtypeSize(tf
, evT
, offsetRoot
+size
,size
,
2322 fld
->child
[0], evD
+size
);
2324 }else size
= fld
->field_size
;
2326 fld
->fixed_root
= (offsetRoot
==-1) ? 0 : 1;
2327 fld
->fixed_parent
= (offsetParent
==-1) ? 0 : 1;
2333 size1
= (int) ltt_type_size(fac
, type
);
2334 if(fld
->field_fixed
== -1){
2335 fld
->sequ_number_size
= size1
;
2336 fld
->field_fixed
= 0;
2337 size
= getFieldtypeSize(evT
, offsetRoot
,
2338 0,fld
->child
[0], NULL
);
2339 fld
->element_size
= size
;
2341 element_number
= getIntNumber(tf
,size1
,evD
);
2342 type
->element_number
= element_number
;
2343 if(fld
->element_size
> 0){
2344 size
= element_number
* fld
->element_size
;
2345 }else{//sequence has string or sequence
2347 for(i
=0;i
<element_number
;i
++){
2348 size
+= getFieldtypeSize(tf
, evT
,
2349 offsetRoot
+size
+size1
,size
+size1
,
2350 fld
->child
[0], evD
+size
+size1
);
2356 fld
->fixed_root
= (offsetRoot
==-1) ? 0 : 1;
2357 fld
->fixed_parent
= (offsetParent
==-1) ? 0 : 1;
2364 if(fld
->field_fixed
== -1){
2365 fld
->field_fixed
= 0;
2367 /* Hope my implementation is faster than strlen (Mathieu) */
2368 char *ptr
=(char*)evD
;
2370 /* from gcov : many many strings are empty, make it the common case.*/
2371 while(unlikely(*ptr
!= '\0')) { size
++; ptr
++; }
2372 //size = ptr - (char*)evD + 1; //include end : '\0'
2374 fld
->fixed_root
= (offsetRoot
==-1) ? 0 : 1;
2375 fld
->fixed_parent
= (offsetParent
==-1) ? 0 : 1;
2380 element_number
= (int) type
->element_number
;
2382 /* tested with gcov */
2383 if(unlikely(fld
->field_fixed
== -1)){
2384 offset1
= offsetRoot
;
2386 for(i
=0;i
<element_number
;i
++){
2387 size1
=getFieldtypeSize(tf
, evT
,offset1
,offset2
,
2388 fld
->child
[i
], NULL
);
2389 if(likely(size1
> 0 && size
>= 0)){
2391 if(likely(offset1
>= 0)) offset1
+= size1
;
2399 if(unlikely(size
== -1)){
2400 fld
->field_fixed
= 0;
2402 }else fld
->field_fixed
= 1;
2403 }else if(likely(fld
->field_fixed
== 0)){
2404 offset1
= offsetRoot
;
2406 for(i
=0;unlikely(i
<element_number
);i
++){
2407 size
=getFieldtypeSize(tf
, evT
, offset1
, offset2
,
2408 fld
->child
[i
], evD
+offset2
);
2413 }else size
= fld
->field_size
;
2414 fld
->fixed_root
= (offsetRoot
==-1) ? 0 : 1;
2415 fld
->fixed_parent
= (offsetParent
==-1) ? 0 : 1;
2419 if(unlikely(fld
->field_fixed
== -1)){
2420 size
= (int) ltt_type_size(LTT_GET_BO(tf
), type
);
2421 fld
->field_fixed
= 1;
2422 }else size
= fld
->field_size
;
2424 fld
->fixed_root
= (offsetRoot
==-1) ? 0 : 1;
2425 fld
->fixed_parent
= (offsetParent
==-1) ? 0 : 1;
2430 fld
->offset_root
= offsetRoot
;
2431 fld
->offset_parent
= offsetParent
;
2432 fld
->field_size
= size
;
2434 end_getFieldtypeSize
:
2440 /*****************************************************************************
2442 * ltt_get_int : get an integer number
2444 * reverse_byte_order: must we reverse the byte order ?
2445 * size : the size of the integer
2446 * ptr : the data pointer
2448 * gint64 : a 64 bits integer
2449 ****************************************************************************/
2451 gint64
ltt_get_int(gboolean reverse_byte_order
, gint size
, void *data
)
2456 case 1: val
= *((gint8
*)data
); break;
2457 case 2: val
= ltt_get_int16(reverse_byte_order
, data
); break;
2458 case 4: val
= ltt_get_int32(reverse_byte_order
, data
); break;
2459 case 8: val
= ltt_get_int64(reverse_byte_order
, data
); break;
2460 default: val
= ltt_get_int64(reverse_byte_order
, data
);
2461 g_critical("get_int : integer size %d unknown", size
);
2468 /*****************************************************************************
2470 * ltt_get_uint : get an unsigned integer number
2472 * reverse_byte_order: must we reverse the byte order ?
2473 * size : the size of the integer
2474 * ptr : the data pointer
2476 * guint64 : a 64 bits unsigned integer
2477 ****************************************************************************/
2479 guint64
ltt_get_uint(gboolean reverse_byte_order
, gint size
, void *data
)
2484 case 1: val
= *((gint8
*)data
); break;
2485 case 2: val
= ltt_get_uint16(reverse_byte_order
, data
); break;
2486 case 4: val
= ltt_get_uint32(reverse_byte_order
, data
); break;
2487 case 8: val
= ltt_get_uint64(reverse_byte_order
, data
); break;
2488 default: val
= ltt_get_uint64(reverse_byte_order
, data
);
2489 g_critical("get_uint : unsigned integer size %d unknown",
2498 /* get the node name of the system */
2500 char * ltt_trace_system_description_node_name (LttSystemDescription
* s
)
2502 return s
->node_name
;
2506 /* get the domain name of the system */
2508 char * ltt_trace_system_description_domain_name (LttSystemDescription
* s
)
2510 return s
->domain_name
;
2514 /* get the description of the system */
2516 char * ltt_trace_system_description_description (LttSystemDescription
* s
)
2518 return s
->description
;
2522 /* get the start time of the trace */
2524 LttTime
ltt_trace_system_description_trace_start_time(LttSystemDescription
*s
)
2526 return s
->trace_start
;
2530 LttTracefile
*ltt_tracefile_new()
2532 return g_new(LttTracefile
, 1);
2535 void ltt_tracefile_destroy(LttTracefile
*tf
)
2540 void ltt_tracefile_copy(LttTracefile
*dest
, const LttTracefile
*src
)
2545 /* Before library loading... */
2547 static void __attribute__((constructor
)) init(void)
2549 LTT_FACILITY_NAME_HEARTBEAT
= g_quark_from_string("heartbeat");
2550 LTT_EVENT_NAME_HEARTBEAT
= g_quark_from_string("heartbeat");
2552 LTT_TRACEFILE_NAME_FACILITIES
= g_quark_from_string("/control/facilities");