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 library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License Version 2.1 as published by the Free Software Foundation.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 * Boston, MA 02111-1307, USA.
30 #include <sys/types.h>
35 #include <glib/gprintf.h>
48 #include "ltt-private.h"
49 #include <ltt/trace.h>
50 #include <ltt/event.h>
51 #include <ltt/ltt-types.h>
52 #include <ltt/marker.h>
54 #define DEFAULT_N_BLOCKS 32
57 extern long marker_update_fields_offsets(struct marker_info
*info
, const char *data
);
59 /* Tracefile names used in this file */
61 GQuark LTT_TRACEFILE_NAME_METADATA
;
68 #define __UNUSED__ __attribute__((__unused__))
70 #define g_info(format...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_INFO, format)
73 #define g_debug(format...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, format)
78 /* Those macros must be called from within a function where page_size is a known
80 #define PAGE_MASK (~(page_size-1))
81 #define PAGE_ALIGN(addr) (((addr)+page_size-1)&PAGE_MASK)
83 /* set the offset of the fields belonging to the event,
84 need the information of the archecture */
85 //void set_fields_offsets(LttTracefile *tf, LttEventType *event_type);
86 //size_t get_fields_offsets(LttTracefile *tf, LttEventType *event_type, void *data);
88 /* map a fixed size or a block information from the file (fd) */
89 static gint
map_block(LttTracefile
* tf
, guint block_num
);
91 /* calculate nsec per cycles for current block */
93 static guint32
calc_nsecs_per_cycle(LttTracefile
* t
);
94 static guint64
cycles_2_ns(LttTracefile
*tf
, guint64 cycles
);
97 /* go to the next event */
98 static int ltt_seek_next_event(LttTracefile
*tf
);
100 static int open_tracefiles(LttTrace
*trace
, gchar
*root_path
,
101 gchar
*relative_path
);
102 static int ltt_process_metadata_tracefile(LttTracefile
*tf
);
103 static void ltt_tracefile_time_span_get(LttTracefile
*tf
,
104 LttTime
*start
, LttTime
*end
);
105 static void group_time_span_get(GQuark name
, gpointer data
, gpointer user_data
);
106 static gint
map_block(LttTracefile
* tf
, guint block_num
);
107 static void ltt_update_event_size(LttTracefile
*tf
);
109 /* Enable event debugging */
110 static int a_event_debug
= 0;
112 void ltt_event_debug(int state
)
114 a_event_debug
= state
;
119 * Return value : 0 success, 1 bad tracefile
121 static int parse_trace_header(ltt_subbuffer_header_t
*header
,
122 LttTracefile
*tf
, LttTrace
*t
)
124 if (header
->magic_number
== LTT_MAGIC_NUMBER
)
126 else if(header
->magic_number
== LTT_REV_MAGIC_NUMBER
)
128 else /* invalid magic number, bad tracefile ! */
132 t
->ltt_major_version
= header
->major_version
;
133 t
->ltt_minor_version
= header
->minor_version
;
134 t
->arch_size
= header
->arch_size
;
136 tf
->alignment
= header
->alignment
;
138 /* Get float byte order : might be different from int byte order
139 * (or is set to 0 if the trace has no float (kernel trace)) */
140 tf
->float_word_order
= 0;
142 switch(header
->major_version
) {
145 g_warning("Unsupported trace version : %hhu.%hhu",
146 header
->major_version
, header
->minor_version
);
150 switch(header
->minor_version
) {
153 struct ltt_subbuffer_header_2_5
*vheader
= header
;
154 tf
->buffer_header_size
= ltt_subbuffer_header_size();
157 tf
->tsc_mask
= ((1ULL << tf
->tscbits
) - 1);
158 tf
->tsc_mask_next_bit
= (1ULL << tf
->tscbits
);
161 t
->start_freq
= ltt_get_uint64(LTT_GET_BO(tf
),
162 &vheader
->start_freq
);
163 t
->freq_scale
= ltt_get_uint32(LTT_GET_BO(tf
),
164 &vheader
->freq_scale
);
165 t
->start_tsc
= ltt_get_uint64(LTT_GET_BO(tf
),
166 &vheader
->cycle_count_begin
);
167 t
->start_monotonic
= 0;
168 t
->start_time
.tv_sec
= ltt_get_uint64(LTT_GET_BO(tf
),
169 &vheader
->start_time_sec
);
170 t
->start_time
.tv_nsec
= ltt_get_uint64(LTT_GET_BO(tf
),
171 &vheader
->start_time_usec
);
172 t
->start_time
.tv_nsec
*= 1000; /* microsec to nanosec */
174 t
->start_time_from_tsc
= ltt_time_from_uint64(
176 * 1000000000.0 * tf
->trace
->freq_scale
177 / (double)t
->start_freq
);
182 g_warning("Unsupported trace version : %hhu.%hhu",
183 header
->major_version
, header
->minor_version
);
188 g_warning("Unsupported trace version : %hhu.%hhu",
189 header
->major_version
, header
->minor_version
);
195 int get_block_offset_size(LttTracefile
*tf
, guint block_num
,
196 uint64_t *offset
, uint32_t *size
)
200 if (unlikely(block_num
>= tf
->num_blocks
))
203 offa
= g_array_index(tf
->buf_index
, uint64_t, block_num
);
204 if (likely(block_num
< tf
->num_blocks
- 1))
205 offb
= g_array_index(tf
->buf_index
, uint64_t, block_num
+ 1);
207 offb
= tf
->file_size
;
213 int ltt_trace_create_block_index(LttTracefile
*tf
)
215 int page_size
= getpagesize();
218 unsigned int header_map_size
= PAGE_ALIGN(ltt_subbuffer_header_size());
220 tf
->buf_index
= g_array_sized_new(FALSE
, TRUE
, sizeof(uint64_t),
223 g_assert(tf
->buf_index
->len
== i
);
225 while (offset
< tf
->file_size
) {
226 ltt_subbuffer_header_t
*header
;
229 tf
->buf_index
= g_array_set_size(tf
->buf_index
, i
+ 1);
230 off
= &g_array_index(tf
->buf_index
, uint64_t, i
);
233 /* map block header */
234 header
= mmap(0, header_map_size
, PROT_READ
,
235 MAP_PRIVATE
, tf
->fd
, (off_t
)offset
);
236 if(header
== MAP_FAILED
) {
237 perror("Error in allocating memory for buffer of tracefile");
241 /* read len, offset += len */
242 offset
+= ltt_get_uint32(LTT_GET_BO(tf
), &header
->sb_size
);
244 /* unmap block header */
245 if(munmap(header
, header_map_size
)) {
246 g_warning("unmap size : %u\n", header_map_size
);
247 perror("munmap error");
257 /*****************************************************************************
259 * ltt_tracefile_open : open a trace file, construct a LttTracefile
261 * t : the trace containing the tracefile
262 * fileName : path name of the trace file
263 * tf : the tracefile structure
265 * : 0 for success, -1 otherwise.
266 ****************************************************************************/
268 static gint
ltt_tracefile_open(LttTrace
*t
, gchar
* fileName
, LttTracefile
*tf
)
270 struct stat lTDFStat
; /* Trace data file status */
271 ltt_subbuffer_header_t
*header
;
272 int page_size
= getpagesize();
275 tf
->long_name
= g_quark_from_string(fileName
);
277 tf
->fd
= open(fileName
, O_RDONLY
);
278 tf
->buf_index
= NULL
;
280 g_warning("Unable to open input data file %s\n", fileName
);
284 // Get the file's status
285 if(fstat(tf
->fd
, &lTDFStat
) < 0){
286 g_warning("Unable to get the status of the input data file %s\n", fileName
);
290 // Is the file large enough to contain a trace
291 if(lTDFStat
.st_size
<
292 (off_t
)(ltt_subbuffer_header_size())){
293 g_print("The input data file %s does not contain a trace\n", fileName
);
297 /* Temporarily map the buffer start header to get trace information */
298 /* Multiple of pages aligned head */
299 tf
->buffer
.head
= mmap(0,
300 PAGE_ALIGN(ltt_subbuffer_header_size()), PROT_READ
,
301 MAP_PRIVATE
, tf
->fd
, 0);
302 if(tf
->buffer
.head
== MAP_FAILED
) {
303 perror("Error in allocating memory for buffer of tracefile");
306 g_assert( ( (gulong
)tf
->buffer
.head
&(8-1) ) == 0); // make sure it's aligned.
308 header
= (ltt_subbuffer_header_t
*)tf
->buffer
.head
;
310 if(parse_trace_header(header
, tf
, NULL
)) {
311 g_warning("parse_trace_header error");
315 //store the size of the file
316 tf
->file_size
= lTDFStat
.st_size
;
318 tf
->subbuf_corrupt
= 0;
320 if(munmap(tf
->buffer
.head
,
321 PAGE_ALIGN(ltt_subbuffer_header_size()))) {
322 g_warning("unmap size : %zu\n",
323 PAGE_ALIGN(ltt_subbuffer_header_size()));
324 perror("munmap error");
327 tf
->buffer
.head
= NULL
;
329 /* Create block index */
330 ltt_trace_create_block_index(tf
);
332 //read the first block
333 if(map_block(tf
,0)) {
334 perror("Cannot map block for tracefile");
342 if(munmap(tf
->buffer
.head
,
343 PAGE_ALIGN(ltt_subbuffer_header_size()))) {
344 g_warning("unmap size : %zu\n",
345 PAGE_ALIGN(ltt_subbuffer_header_size()));
346 perror("munmap error");
353 g_array_free(tf
->buf_index
, TRUE
);
358 /*****************************************************************************
360 * ltt_tracefile_close: close a trace file,
362 * t : tracefile which will be closed
363 ****************************************************************************/
365 static void ltt_tracefile_close(LttTracefile
*t
)
367 int page_size
= getpagesize();
369 if(t
->buffer
.head
!= NULL
)
370 if(munmap(t
->buffer
.head
, PAGE_ALIGN(t
->buffer
.size
))) {
371 g_warning("unmap size : %u\n",
372 PAGE_ALIGN(t
->buffer
.size
));
373 perror("munmap error");
379 g_array_free(t
->buf_index
, TRUE
);
382 /****************************************************************************
383 * get_absolute_pathname
385 * return the unique pathname in the system
387 * MD : Fixed this function so it uses realpath, dealing well with
388 * forgotten cases (.. were not used correctly before).
390 ****************************************************************************/
391 void get_absolute_pathname(const gchar
*pathname
, gchar
* abs_pathname
)
393 abs_pathname
[0] = '\0';
395 if (realpath(pathname
, abs_pathname
) != NULL
)
399 /* error, return the original path unmodified */
400 strcpy(abs_pathname
, pathname
);
406 /* Search for something like : .*_.*
408 * The left side is the name, the right side is the number.
410 * Exclude flight- prefix.
413 static int get_tracefile_name_number(gchar
*raw_name
,
420 guint raw_name_len
= strlen(raw_name
);
421 gchar char_name
[PATH_MAX
];
429 for(i
= 0; i
< raw_name_len
-1;i
++) {
430 if(raw_name
[i
] != '/')
433 raw_name
= &raw_name
[i
];
434 raw_name_len
= strlen(raw_name
);
436 for(i
=raw_name_len
-1;i
>=0;i
--) {
437 if(raw_name
[i
] == '_') break;
439 if(i
==-1) { /* Either not found or name length is 0 */
440 /* This is a userspace tracefile */
441 strncpy(char_name
, raw_name
, raw_name_len
);
442 char_name
[raw_name_len
] = '\0';
443 *name
= g_quark_from_string(char_name
);
444 *num
= 0; /* unknown cpu */
445 for(i
=0;i
<raw_name_len
;i
++) {
446 if(raw_name
[i
] == '/') {
451 for(;i
<raw_name_len
;i
++) {
452 if(raw_name
[i
] == '/') {
457 for(;i
<raw_name_len
;i
++) {
458 if(raw_name
[i
] == '-') {
462 if(i
== raw_name_len
) return -1;
464 tmpptr
= &raw_name
[i
];
465 for(;i
<raw_name_len
;i
++) {
466 if(raw_name
[i
] == '.') {
471 *tid
= strtoul(tmpptr
, &endptr
, 10);
473 return -1; /* No digit */
474 if(*tid
== ULONG_MAX
)
475 return -1; /* underflow / overflow */
477 tmpptr
= &raw_name
[i
];
478 for(;i
<raw_name_len
;i
++) {
479 if(raw_name
[i
] == '.') {
484 *pgid
= strtoul(tmpptr
, &endptr
, 10);
486 return -1; /* No digit */
487 if(*pgid
== ULONG_MAX
)
488 return -1; /* underflow / overflow */
490 tmpptr
= &raw_name
[i
];
491 *creation
= strtoull(tmpptr
, &endptr
, 10);
493 return -1; /* No digit */
494 if(*creation
== G_MAXUINT64
)
495 return -1; /* underflow / overflow */
499 cpu_num
= strtol(raw_name
+underscore_pos
+1, &endptr
, 10);
501 if(endptr
== raw_name
+underscore_pos
+1)
502 return -1; /* No digit */
503 if(cpu_num
== LONG_MIN
|| cpu_num
== LONG_MAX
)
504 return -1; /* underflow / overflow */
506 if (!strncmp(raw_name
, "flight-", sizeof("flight-") - 1)) {
507 raw_name
+= sizeof("flight-") - 1;
508 underscore_pos
-= sizeof("flight-") - 1;
510 strncpy(char_name
, raw_name
, underscore_pos
);
511 char_name
[underscore_pos
] = '\0';
512 *name
= g_quark_from_string(char_name
);
521 GData
**ltt_trace_get_tracefiles_groups(LttTrace
*trace
)
523 return &trace
->tracefiles
;
527 void compute_tracefile_group(GQuark key_id
,
529 struct compute_tracefile_group_args
*args
)
534 for(i
=0; i
<group
->len
; i
++) {
535 tf
= &g_array_index (group
, LttTracefile
, i
);
537 args
->func(tf
, args
->func_args
);
542 static void ltt_tracefile_group_destroy(gpointer data
)
544 GArray
*group
= (GArray
*)data
;
549 destroy_marker_data(g_array_index (group
, LttTracefile
, 0).mdata
);
550 for(i
=0; i
<group
->len
; i
++) {
551 tf
= &g_array_index (group
, LttTracefile
, i
);
553 ltt_tracefile_close(tf
);
555 g_array_free(group
, TRUE
);
558 static __attribute__ ((__unused__
)) gboolean
ltt_tracefile_group_has_cpu_online(gpointer data
)
560 GArray
*group
= (GArray
*)data
;
564 for(i
=0; i
<group
->len
; i
++) {
565 tf
= &g_array_index (group
, LttTracefile
, i
);
573 /* Open each tracefile under a specific directory. Put them in a
574 * GData : permits to access them using their tracefile group pathname.
575 * i.e. access control/modules tracefile group by index :
578 * relative path is the path relative to the trace root
579 * root path is the full path
581 * A tracefile group is simply an array where all the per cpu tracefiles sit.
584 static int open_tracefiles(LttTrace
*trace
, gchar
*root_path
, gchar
*relative_path
)
586 DIR *dir
= opendir(root_path
);
587 struct dirent
*entry
;
588 struct stat stat_buf
;
590 struct marker_data
*mdata
;
592 gchar path
[PATH_MAX
];
597 gchar rel_path
[PATH_MAX
];
606 strncpy(path
, root_path
, PATH_MAX
-1);
607 path_len
= strlen(path
);
608 path
[path_len
] = '/';
610 path_ptr
= path
+ path_len
;
612 strncpy(rel_path
, relative_path
, PATH_MAX
-1);
613 rel_path_len
= strlen(rel_path
);
614 rel_path
[rel_path_len
] = '/';
616 rel_path_ptr
= rel_path
+ rel_path_len
;
618 while((entry
= readdir(dir
)) != NULL
) {
620 if(entry
->d_name
[0] == '.') continue;
622 strncpy(path_ptr
, entry
->d_name
, PATH_MAX
- path_len
);
623 strncpy(rel_path_ptr
, entry
->d_name
, PATH_MAX
- rel_path_len
);
625 ret
= stat(path
, &stat_buf
);
631 g_debug("Tracefile file or directory : %s\n", path
);
633 // if(strcmp(rel_path, "/eventdefs") == 0) continue;
635 if(S_ISDIR(stat_buf
.st_mode
)) {
637 g_debug("Entering subdirectory...\n");
638 ret
= open_tracefiles(trace
, path
, rel_path
);
639 if(ret
< 0) continue;
640 } else if(S_ISREG(stat_buf
.st_mode
)) {
649 if(get_tracefile_name_number(rel_path
, &name
, &num
, &tid
, &pgid
, &creation
))
650 continue; /* invalid name */
652 g_debug("Opening file.\n");
653 if(ltt_tracefile_open(trace
, path
, &tmp_tf
)) {
654 g_info("Error opening tracefile %s", path
);
656 continue; /* error opening the tracefile : bad magic number ? */
659 g_debug("Tracefile name is %s and number is %u",
660 g_quark_to_string(name
), num
);
663 tmp_tf
.cpu_online
= 1;
664 tmp_tf
.cpu_num
= num
;
668 tmp_tf
.creation
= creation
;
669 group
= g_datalist_id_get_data(&trace
->tracefiles
, name
);
671 /* Elements are automatically cleared when the array is allocated.
672 * It makes the cpu_online variable set to 0 : cpu offline, by default.
674 group
= g_array_sized_new (FALSE
, TRUE
, sizeof(LttTracefile
), 10);
675 g_datalist_id_set_data_full(&trace
->tracefiles
, name
,
676 group
, ltt_tracefile_group_destroy
);
677 mdata
= allocate_marker_data();
679 g_error("Error in allocating marker data");
682 /* Add the per cpu tracefile to the named group */
683 unsigned int old_len
= group
->len
;
685 group
= g_array_set_size(group
, num
+1);
687 g_assert(group
->len
> 0);
689 mdata
= g_array_index (group
, LttTracefile
, 0).mdata
;
691 g_array_index (group
, LttTracefile
, num
) = tmp_tf
;
692 g_array_index (group
, LttTracefile
, num
).event
.tracefile
=
693 &g_array_index (group
, LttTracefile
, num
);
694 for (i
= 0; i
< group
->len
; i
++)
695 g_array_index (group
, LttTracefile
, i
).mdata
= mdata
;
705 /* Presumes the tracefile is already seeked at the beginning. It makes sense,
706 * because it must be done just after the opening */
707 static int ltt_process_metadata_tracefile(LttTracefile
*tf
)
712 err
= ltt_tracefile_read_seek(tf
);
713 if(err
== EPERM
) goto seek_error
;
714 else if(err
== ERANGE
) break; /* End of tracefile */
716 err
= ltt_tracefile_read_update_event(tf
);
717 if(err
) goto update_error
;
720 * It contains only core events :
722 * 1 : set_marker_format
724 if(tf
->event
.event_id
>= MARKER_CORE_IDS
) {
725 /* Should only contain core events */
726 g_warning("Error in processing metadata file %s, "
727 "should not contain event id %u.", g_quark_to_string(tf
->name
),
733 const char *channel_name
, *marker_name
, *format
;
735 guint8 int_size
, long_size
, pointer_size
, size_t_size
, alignment
;
737 switch((enum marker_id
)tf
->event
.event_id
) {
738 case MARKER_ID_SET_MARKER_ID
:
739 channel_name
= pos
= tf
->event
.data
;
740 pos
+= strlen(channel_name
) + 1;
742 g_debug("Doing MARKER_ID_SET_MARKER_ID of marker %s.%s",
743 channel_name
, marker_name
);
744 pos
+= strlen(marker_name
) + 1;
745 pos
+= ltt_align((size_t)pos
, sizeof(guint16
), tf
->alignment
);
746 id
= ltt_get_uint16(LTT_GET_BO(tf
), pos
);
747 g_debug("In MARKER_ID_SET_MARKER_ID of marker %s.%s id %hu",
748 channel_name
, marker_name
, id
);
749 pos
+= sizeof(guint16
);
750 int_size
= *(guint8
*)pos
;
751 pos
+= sizeof(guint8
);
752 long_size
= *(guint8
*)pos
;
753 pos
+= sizeof(guint8
);
754 pointer_size
= *(guint8
*)pos
;
755 pos
+= sizeof(guint8
);
756 size_t_size
= *(guint8
*)pos
;
757 pos
+= sizeof(guint8
);
758 alignment
= *(guint8
*)pos
;
759 pos
+= sizeof(guint8
);
760 marker_id_event(tf
->trace
,
761 g_quark_from_string(channel_name
),
762 g_quark_from_string(marker_name
),
763 id
, int_size
, long_size
,
764 pointer_size
, size_t_size
, alignment
);
766 case MARKER_ID_SET_MARKER_FORMAT
:
767 channel_name
= pos
= tf
->event
.data
;
768 pos
+= strlen(channel_name
) + 1;
770 g_debug("Doing MARKER_ID_SET_MARKER_FORMAT of marker %s.%s",
771 channel_name
, marker_name
);
772 pos
+= strlen(marker_name
) + 1;
774 pos
+= strlen(format
) + 1;
775 marker_format_event(tf
->trace
,
776 g_quark_from_string(channel_name
),
777 g_quark_from_string(marker_name
),
779 /* get information from dictionary TODO */
782 g_warning("Error in processing metadata file %s, "
783 "unknown event id %hhu.",
784 g_quark_to_string(tf
->name
),
797 g_warning("An error occured in metadata tracefile parsing");
802 * Open a trace and return its LttTrace handle.
804 * pathname must be the directory of the trace
807 LttTrace
*ltt_trace_open(const gchar
*pathname
)
809 gchar abs_path
[PATH_MAX
];
815 ltt_subbuffer_header_t
*header
;
817 struct dirent
*entry
;
818 struct stat stat_buf
;
819 gchar path
[PATH_MAX
];
821 t
= g_new(LttTrace
, 1);
822 if(!t
) goto alloc_error
;
824 get_absolute_pathname(pathname
, abs_path
);
825 t
->pathname
= g_quark_from_string(abs_path
);
827 g_datalist_init(&t
->tracefiles
);
829 /* Test to see if it looks like a trace */
830 dir
= opendir(abs_path
);
835 while((entry
= readdir(dir
)) != NULL
) {
836 strcpy(path
, abs_path
);
838 strcat(path
, entry
->d_name
);
839 ret
= stat(path
, &stat_buf
);
847 /* Open all the tracefiles */
849 if(open_tracefiles(t
, abs_path
, "")) {
850 g_warning("Error opening tracefile %s", abs_path
);
854 /* Parse each trace metadata_N files : get runtime fac. info */
855 group
= g_datalist_id_get_data(&t
->tracefiles
, LTT_TRACEFILE_NAME_METADATA
);
857 g_warning("Trace %s has no metadata tracefile", abs_path
);
862 * Get the trace information for the metadata_0 tracefile.
863 * Getting a correct trace start_time and start_tsc is insured by the fact
864 * that no subbuffers are supposed to be lost in the metadata channel.
865 * Therefore, the first subbuffer contains the start_tsc timestamp in its
868 g_assert(group
->len
> 0);
869 tf
= &g_array_index (group
, LttTracefile
, 0);
870 header
= (ltt_subbuffer_header_t
*)tf
->buffer
.head
;
871 ret
= parse_trace_header(header
, tf
, t
);
874 t
->num_cpu
= group
->len
;
876 //ret = allocate_marker_data(t);
878 // g_error("Error in allocating marker data");
880 for(i
=0; i
<group
->len
; i
++) {
881 tf
= &g_array_index (group
, LttTracefile
, i
);
883 if(ltt_process_metadata_tracefile(tf
))
885 // goto metadata_error;
892 // destroy_marker_data(t);
894 g_datalist_clear(&t
->tracefiles
);
902 /* Open another, completely independant, instance of a trace.
904 * A read on this new instance will read the first event of the trace.
906 * When we copy a trace, we want all the opening actions to happen again :
907 * the trace will be reopened and totally independant from the original.
908 * That's why we call ltt_trace_open.
910 LttTrace
*ltt_trace_copy(LttTrace
*self
)
912 return ltt_trace_open(g_quark_to_string(self
->pathname
));
919 void ltt_trace_close(LttTrace
*t
)
921 g_datalist_clear(&t
->tracefiles
);
926 /*****************************************************************************
927 * Get the start time and end time of the trace
928 ****************************************************************************/
930 void ltt_tracefile_time_span_get(LttTracefile
*tf
,
931 LttTime
*start
, LttTime
*end
)
935 err
= map_block(tf
, 0);
937 g_error("Can not map block");
938 *start
= ltt_time_infinite
;
940 *start
= tf
->buffer
.begin
.timestamp
;
942 err
= map_block(tf
, tf
->num_blocks
- 1); /* Last block */
944 g_error("Can not map block");
945 *end
= ltt_time_zero
;
947 *end
= tf
->buffer
.end
.timestamp
;
949 g_assert(end
->tv_sec
<= G_MAXUINT
);
952 struct tracefile_time_span_get_args
{
958 static void group_time_span_get(GQuark name
, gpointer data
, gpointer user_data
)
960 struct tracefile_time_span_get_args
*args
=
961 (struct tracefile_time_span_get_args
*)user_data
;
963 GArray
*group
= (GArray
*)data
;
969 for(i
=0; i
<group
->len
; i
++) {
970 tf
= &g_array_index (group
, LttTracefile
, i
);
972 ltt_tracefile_time_span_get(tf
, &tmp_start
, &tmp_end
);
973 if(ltt_time_compare(*args
->start
, tmp_start
)>0) *args
->start
= tmp_start
;
974 if(ltt_time_compare(*args
->end
, tmp_end
)<0) *args
->end
= tmp_end
;
979 /* return the start and end time of a trace */
981 void ltt_trace_time_span_get(LttTrace
*t
, LttTime
*start
, LttTime
*end
)
983 LttTime min_start
= ltt_time_infinite
;
984 LttTime max_end
= ltt_time_zero
;
985 struct tracefile_time_span_get_args args
= { t
, &min_start
, &max_end
};
987 g_datalist_foreach(&t
->tracefiles
, &group_time_span_get
, &args
);
989 if(start
!= NULL
) *start
= min_start
;
990 if(end
!= NULL
) *end
= max_end
;
995 /* Seek to the first event in a tracefile that has a time equal or greater than
996 * the time passed in parameter.
998 * If the time parameter is outside the tracefile time span, seek to the first
999 * event or if after, return ERANGE.
1001 * If the time parameter is before the first event, we have to seek specially to
1004 * If the time is after the end of the trace, return ERANGE.
1006 * Do a binary search to find the right block, then a sequential search in the
1007 * block to find the event.
1009 * In the special case where the time requested fits inside a block that has no
1010 * event corresponding to the requested time, the first event of the next block
1013 * IMPORTANT NOTE : // FIXME everywhere...
1015 * You MUST NOT do a ltt_tracefile_read right after a ltt_tracefile_seek_time :
1016 * you will jump over an event if you do.
1018 * Return value : 0 : no error, the tf->event can be used
1019 * ERANGE : time if after the last event of the trace
1020 * otherwise : this is an error.
1024 int ltt_tracefile_seek_time(LttTracefile
*tf
, LttTime time
)
1028 unsigned int block_num
, high
, low
;
1030 /* seek at the beginning of trace */
1031 err
= map_block(tf
, 0); /* First block */
1033 g_error("Can not map block");
1037 /* If the time is lower or equal the beginning of the trace,
1038 * go to the first event. */
1039 if(ltt_time_compare(time
, tf
->buffer
.begin
.timestamp
) <= 0) {
1040 ret
= ltt_tracefile_read(tf
);
1041 if(ret
== ERANGE
) goto range
;
1042 else if (ret
) goto fail
;
1043 goto found
; /* There is either no event in the trace or the event points
1044 to the first event in the trace */
1047 err
= map_block(tf
, tf
->num_blocks
- 1); /* Last block */
1049 g_error("Can not map block");
1053 /* If the time is after the end of the trace, return ERANGE. */
1054 if(ltt_time_compare(time
, tf
->buffer
.end
.timestamp
) > 0) {
1058 /* Binary search the block */
1059 high
= tf
->num_blocks
- 1;
1063 block_num
= ((high
-low
) / 2) + low
;
1065 err
= map_block(tf
, block_num
);
1067 g_error("Can not map block");
1071 /* We cannot divide anymore : this is what would happen if the time
1072 * requested was exactly between two consecutive buffers'end and start
1073 * timestamps. This is also what would happend if we didn't deal with out
1074 * of span cases prior in this function. */
1075 /* The event is right in the buffer!
1076 * (or in the next buffer first event) */
1078 ret
= ltt_tracefile_read(tf
);
1079 if(ret
== ERANGE
) goto range
; /* ERANGE or EPERM */
1080 else if(ret
) goto fail
;
1082 if(ltt_time_compare(time
, tf
->event
.event_time
) <= 0)
1086 } else if(ltt_time_compare(time
, tf
->buffer
.begin
.timestamp
) < 0) {
1087 /* go to lower part */
1088 high
= block_num
- 1;
1089 } else if(ltt_time_compare(time
, tf
->buffer
.end
.timestamp
) > 0) {
1090 /* go to higher part */
1091 low
= block_num
+ 1;
1092 } else {/* The event is right in the buffer!
1093 (or in the next buffer first event) */
1095 ret
= ltt_tracefile_read(tf
);
1096 if(ret
== ERANGE
) goto range
; /* ERANGE or EPERM */
1097 else if(ret
) goto fail
;
1099 if(ltt_time_compare(time
, tf
->event
.event_time
) <= 0)
1111 /* Error handling */
1113 g_error("ltt_tracefile_seek_time failed on tracefile %s",
1114 g_quark_to_string(tf
->name
));
1118 /* Seek to a position indicated by an LttEventPosition
1121 int ltt_tracefile_seek_position(LttTracefile
*tf
, const LttEventPosition
*ep
)
1125 if(ep
->tracefile
!= tf
) {
1129 err
= map_block(tf
, ep
->block
);
1131 g_error("Can not map block");
1135 tf
->event
.offset
= ep
->offset
;
1137 /* Put back the event real tsc */
1138 tf
->event
.tsc
= ep
->tsc
;
1139 tf
->buffer
.tsc
= ep
->tsc
;
1141 err
= ltt_tracefile_read_update_event(tf
);
1144 /* deactivate this, as it does nothing for now
1145 err = ltt_tracefile_read_op(tf);
1152 g_error("ltt_tracefile_seek_time failed on tracefile %s",
1153 g_quark_to_string(tf
->name
));
1157 /* Given a TSC value, return the LttTime (seconds,nanoseconds) it
1161 LttTime
ltt_interpolate_time_from_tsc(LttTracefile
*tf
, guint64 tsc
)
1165 if(tsc
> tf
->trace
->start_tsc
) {
1166 time
= ltt_time_from_uint64(
1167 (double)(tsc
- tf
->trace
->start_tsc
)
1168 * 1000000000.0 * tf
->trace
->freq_scale
1169 / (double)tf
->trace
->start_freq
);
1170 time
= ltt_time_add(tf
->trace
->start_time_from_tsc
, time
);
1172 time
= ltt_time_from_uint64(
1173 (double)(tf
->trace
->start_tsc
- tsc
)
1174 * 1000000000.0 * tf
->trace
->freq_scale
1175 / (double)tf
->trace
->start_freq
);
1176 time
= ltt_time_sub(tf
->trace
->start_time_from_tsc
, time
);
1181 /* Calculate the real event time based on the buffer boundaries */
1182 LttTime
ltt_interpolate_time(LttTracefile
*tf
, LttEvent
*event
)
1184 return ltt_interpolate_time_from_tsc(tf
, tf
->buffer
.tsc
);
1188 /* Get the current event of the tracefile : valid until the next read */
1189 LttEvent
*ltt_tracefile_get_event(LttTracefile
*tf
)
1196 /*****************************************************************************
1198 * ltt_tracefile_read : Read the next event in the tracefile
1203 * Returns 0 if an event can be used in tf->event.
1204 * Returns ERANGE on end of trace. The event in tf->event still can be used
1205 * (if the last block was not empty).
1206 * Returns EPERM on error.
1208 * This function does make the tracefile event structure point to the event
1209 * currently pointed to by the tf->event.
1211 * Note : you must call a ltt_tracefile_seek to the beginning of the trace to
1212 * reinitialize it after an error if you want results to be coherent.
1213 * It would be the case if a end of trace last buffer has no event : the end
1214 * of trace wouldn't be returned, but an error.
1215 * We make the assumption there is at least one event per buffer.
1216 ****************************************************************************/
1218 int ltt_tracefile_read(LttTracefile
*tf
)
1222 err
= ltt_tracefile_read_seek(tf
);
1224 err
= ltt_tracefile_read_update_event(tf
);
1227 /* deactivate this, as it does nothing for now
1228 err = ltt_tracefile_read_op(tf);
1235 int ltt_tracefile_read_seek(LttTracefile
*tf
)
1239 /* Get next buffer until we finally have an event, or end of trace */
1241 err
= ltt_seek_next_event(tf
);
1242 if(unlikely(err
== ENOPROTOOPT
)) {
1246 /* Are we at the end of the buffer ? */
1248 if(unlikely(tf
->buffer
.index
== tf
->num_blocks
-1)){ /* end of trace ? */
1251 /* get next block */
1252 err
= map_block(tf
, tf
->buffer
.index
+ 1);
1254 g_error("Can not map block");
1258 } else break; /* We found an event ! */
1264 /* do an operation when reading a new event */
1266 /* This function does nothing for now */
1268 int ltt_tracefile_read_op(LttTracefile
*tf
)
1274 /* do event specific operation */
1282 static void print_debug_event_header(LttEvent
*ev
, void *start_pos
, void *end_pos
)
1284 unsigned int offset
= 0;
1287 g_printf("Event header (tracefile %s offset %" PRIx64
"):\n",
1288 g_quark_to_string(ev
->tracefile
->long_name
),
1289 (uint64_t)ev
->tracefile
->buffer
.offset
+
1290 (long)start_pos
- (long)ev
->tracefile
->buffer
.head
);
1292 while (offset
< (long)end_pos
- (long)start_pos
) {
1293 g_printf("%8lx", (long)start_pos
- (long)ev
->tracefile
->buffer
.head
+ offset
);
1296 for (i
= 0; i
< 4 ; i
++) {
1297 for (j
= 0; j
< 4; j
++) {
1298 if (offset
+ ((i
* 4) + j
) <
1299 (long)end_pos
- (long)start_pos
)
1301 ((char*)start_pos
)[offset
+ ((i
* 4) + j
)]);
1315 /* same as ltt_tracefile_read, but does not seek to the next event nor call
1316 * event specific operation. */
1317 int ltt_tracefile_read_update_event(LttTracefile
*tf
)
1322 guint16 packed_evid
; /* event id reader from the 5 bits in header */
1325 pos
= tf
->buffer
.head
+ event
->offset
;
1327 /* Read event header */
1329 /* Align the head */
1330 pos
+= ltt_align((size_t)pos
, sizeof(guint32
), tf
->alignment
);
1333 event
->timestamp
= ltt_get_uint32(LTT_GET_BO(tf
), pos
);
1334 event
->event_id
= packed_evid
= event
->timestamp
>> tf
->tscbits
;
1335 event
->timestamp
= event
->timestamp
& tf
->tsc_mask
;
1336 pos
+= sizeof(guint32
);
1338 switch (packed_evid
) {
1339 case 29: /* LTT_RFLAG_ID_SIZE_TSC */
1340 event
->event_id
= ltt_get_uint16(LTT_GET_BO(tf
), pos
);
1341 pos
+= sizeof(guint16
);
1342 event
->event_size
= ltt_get_uint16(LTT_GET_BO(tf
), pos
);
1343 pos
+= sizeof(guint16
);
1344 if (event
->event_size
== 0xFFFF) {
1345 event
->event_size
= ltt_get_uint32(LTT_GET_BO(tf
), pos
);
1346 pos
+= sizeof(guint32
);
1348 pos
+= ltt_align((size_t)pos
, sizeof(guint64
), tf
->alignment
);
1349 tf
->buffer
.tsc
= ltt_get_uint64(LTT_GET_BO(tf
), pos
);
1350 pos
+= sizeof(guint64
);
1352 case 30: /* LTT_RFLAG_ID_SIZE */
1353 event
->event_id
= ltt_get_uint16(LTT_GET_BO(tf
), pos
);
1354 pos
+= sizeof(guint16
);
1355 event
->event_size
= ltt_get_uint16(LTT_GET_BO(tf
), pos
);
1356 pos
+= sizeof(guint16
);
1357 if (event
->event_size
== 0xFFFF) {
1358 event
->event_size
= ltt_get_uint32(LTT_GET_BO(tf
), pos
);
1359 pos
+= sizeof(guint32
);
1362 case 31: /* LTT_RFLAG_ID */
1363 event
->event_id
= ltt_get_uint16(LTT_GET_BO(tf
), pos
);
1364 pos
+= sizeof(guint16
);
1365 event
->event_size
= G_MAXUINT
;
1368 event
->event_size
= G_MAXUINT
;
1372 if (likely(packed_evid
!= 29)) {
1373 /* No extended timestamp */
1374 if (event
->timestamp
< (tf
->buffer
.tsc
& tf
->tsc_mask
))
1375 tf
->buffer
.tsc
= ((tf
->buffer
.tsc
& ~tf
->tsc_mask
) /* overflow */
1376 + tf
->tsc_mask_next_bit
)
1377 | (guint64
)event
->timestamp
;
1379 tf
->buffer
.tsc
= (tf
->buffer
.tsc
& ~tf
->tsc_mask
) /* no overflow */
1380 | (guint64
)event
->timestamp
;
1382 event
->tsc
= tf
->buffer
.tsc
;
1384 event
->event_time
= ltt_interpolate_time(tf
, event
);
1387 print_debug_event_header(event
, pos_aligned
, pos
);
1392 * Let ltt_update_event_size update event->data according to the largest
1393 * alignment within the payload.
1394 * Get the data size and update the event fields with the current
1396 ltt_update_event_size(tf
);
1402 /****************************************************************************
1404 * map_block : map a block from the file
1406 * lttdes : ltt trace file
1407 * whichBlock : the block which will be read
1410 * EINVAL : lseek fail
1411 * EIO : can not read from the file
1412 ****************************************************************************/
1414 static gint
map_block(LttTracefile
* tf
, guint block_num
)
1416 int page_size
= getpagesize();
1417 ltt_subbuffer_header_t
*header
;
1422 g_assert(block_num
< tf
->num_blocks
);
1424 if(tf
->buffer
.head
!= NULL
) {
1425 if(munmap(tf
->buffer
.head
, PAGE_ALIGN(tf
->buffer
.size
))) {
1426 g_warning("unmap size : %u\n",
1427 PAGE_ALIGN(tf
->buffer
.size
));
1428 perror("munmap error");
1433 ret
= get_block_offset_size(tf
, block_num
, &offset
, &size
);
1436 g_debug("Map block %u, offset %llu, size %u\n", block_num
,
1437 (unsigned long long)offset
, (unsigned int)size
);
1439 /* Multiple of pages aligned head */
1440 tf
->buffer
.head
= mmap(0, (size_t)size
, PROT_READ
, MAP_PRIVATE
,
1441 tf
->fd
, (off_t
)offset
);
1443 if(tf
->buffer
.head
== MAP_FAILED
) {
1444 perror("Error in allocating memory for buffer of tracefile");
1448 g_assert( ( (gulong
)tf
->buffer
.head
&(8-1) ) == 0); // make sure it's aligned.
1450 tf
->buffer
.index
= block_num
;
1452 header
= (ltt_subbuffer_header_t
*)tf
->buffer
.head
;
1454 tf
->buffer
.begin
.cycle_count
= ltt_get_uint64(LTT_GET_BO(tf
),
1455 &header
->cycle_count_begin
);
1456 tf
->buffer
.end
.cycle_count
= ltt_get_uint64(LTT_GET_BO(tf
),
1457 &header
->cycle_count_end
);
1458 tf
->buffer
.offset
= offset
;
1459 tf
->buffer
.size
= ltt_get_uint32(LTT_GET_BO(tf
),
1461 tf
->buffer
.data_size
= ltt_get_uint32(LTT_GET_BO(tf
),
1462 &header
->data_size
);
1463 tf
->buffer
.tsc
= tf
->buffer
.begin
.cycle_count
;
1464 tf
->event
.tsc
= tf
->buffer
.tsc
;
1465 tf
->buffer
.freq
= tf
->buffer
.begin
.freq
;
1467 g_assert(size
== tf
->buffer
.size
);
1468 g_assert(tf
->buffer
.data_size
<= tf
->buffer
.size
);
1470 if (tf
->trace
->start_freq
)
1472 tf
->buffer
.begin
.freq
= tf
->trace
->start_freq
;
1473 tf
->buffer
.begin
.timestamp
= ltt_interpolate_time_from_tsc(tf
,
1474 tf
->buffer
.begin
.cycle_count
);
1475 tf
->buffer
.end
.freq
= tf
->trace
->start_freq
;
1476 tf
->buffer
.end
.timestamp
= ltt_interpolate_time_from_tsc(tf
,
1477 tf
->buffer
.end
.cycle_count
);
1480 /* Make the current event point to the beginning of the buffer :
1481 * it means that the event read must get the first event. */
1482 tf
->event
.tracefile
= tf
;
1483 tf
->event
.block
= block_num
;
1484 tf
->event
.offset
= 0;
1486 if (header
->events_lost
) {
1487 g_warning("%d events lost so far in tracefile %s at block %u",
1488 (guint
)header
->events_lost
,
1489 g_quark_to_string(tf
->long_name
),
1491 tf
->events_lost
= header
->events_lost
;
1493 if (header
->subbuf_corrupt
) {
1494 g_warning("%d subbuffer(s) corrupted so far in tracefile %s at block %u",
1495 (guint
)header
->subbuf_corrupt
,
1496 g_quark_to_string(tf
->long_name
),
1498 tf
->subbuf_corrupt
= header
->subbuf_corrupt
;
1507 static void print_debug_event_data(LttEvent
*ev
)
1509 unsigned int offset
= 0;
1512 if (!max(ev
->event_size
, ev
->data_size
))
1515 g_printf("Event data (tracefile %s offset %" PRIx64
"):\n",
1516 g_quark_to_string(ev
->tracefile
->long_name
),
1517 (uint64_t)ev
->tracefile
->buffer
.offset
1518 + (long)ev
->data
- (long)ev
->tracefile
->buffer
.head
);
1520 while (offset
< max(ev
->event_size
, ev
->data_size
)) {
1521 g_printf("%8lx", (long)ev
->data
+ offset
1522 - (long)ev
->tracefile
->buffer
.head
);
1525 for (i
= 0; i
< 4 ; i
++) {
1526 for (j
= 0; j
< 4; j
++) {
1527 if (offset
+ ((i
* 4) + j
) < max(ev
->event_size
, ev
->data_size
))
1528 g_printf("%02hhX", ((char*)ev
->data
)[offset
+ ((i
* 4) + j
)]);
1539 for (i
= 0; i
< 4; i
++) {
1540 for (j
= 0; j
< 4; j
++) {
1541 if (offset
+ ((i
* 4) + j
) < max(ev
->event_size
, ev
->data_size
)) {
1542 if (isprint(((char*)ev
->data
)[offset
+ ((i
* 4) + j
)]))
1543 g_printf("%c", ((char*)ev
->data
)[offset
+ ((i
* 4) + j
)]);
1555 /* It will update the fields offsets too */
1556 void ltt_update_event_size(LttTracefile
*tf
)
1559 struct marker_info
*info
;
1561 if (tf
->name
== LTT_TRACEFILE_NAME_METADATA
) {
1562 switch((enum marker_id
)tf
->event
.event_id
) {
1563 case MARKER_ID_SET_MARKER_ID
:
1564 size
= strlen((char*)tf
->event
.data
) + 1;
1565 g_debug("marker %s id set", (char*)tf
->event
.data
+ size
);
1566 size
+= strlen((char*)tf
->event
.data
+ size
) + 1;
1567 size
+= ltt_align(size
, sizeof(guint16
), tf
->alignment
);
1568 size
+= sizeof(guint16
);
1569 size
+= sizeof(guint8
);
1570 size
+= sizeof(guint8
);
1571 size
+= sizeof(guint8
);
1572 size
+= sizeof(guint8
);
1573 size
+= sizeof(guint8
);
1575 case MARKER_ID_SET_MARKER_FORMAT
:
1576 size
= strlen((char*)tf
->event
.data
) + 1;
1577 g_debug("marker %s format set", (char*)tf
->event
.data
);
1578 size
+= strlen((char*)tf
->event
.data
+ size
) + 1;
1579 size
+= strlen((char*)tf
->event
.data
+ size
) + 1;
1584 info
= marker_get_info_from_id(tf
->mdata
, tf
->event
.event_id
);
1586 if (tf
->event
.event_id
>= MARKER_CORE_IDS
)
1587 g_assert(info
!= NULL
);
1589 /* Do not update field offsets of core markers when initially reading the
1590 * metadata tracefile when the infos about these markers do not exist yet.
1592 if (likely(info
&& info
->fields
)) {
1594 tf
->event
.data
+= ltt_align((off_t
)(unsigned long)tf
->event
.data
,
1595 info
->largest_align
,
1597 /* size, dynamically computed */
1598 if (info
->size
!= -1)
1601 size
= marker_update_fields_offsets(marker_get_info_from_id(tf
->mdata
,
1602 tf
->event
.event_id
), tf
->event
.data
);
1605 tf
->event
.data_size
= size
;
1607 /* Check consistency between kernel and LTTV structure sizes */
1608 if(tf
->event
.event_size
== G_MAXUINT
) {
1609 /* Event size too big to fit in the event size field */
1610 tf
->event
.event_size
= tf
->event
.data_size
;
1614 print_debug_event_data(&tf
->event
);
1616 if (tf
->event
.data_size
!= tf
->event
.event_size
) {
1617 struct marker_info
*info
= marker_get_info_from_id(tf
->mdata
,
1618 tf
->event
.event_id
);
1620 g_error("Undescribed event %hhu in channel %s", tf
->event
.event_id
,
1621 g_quark_to_string(tf
->name
));
1622 g_error("Kernel/LTTV event size differs for event %s: kernel %u, LTTV %u",
1623 g_quark_to_string(info
->name
),
1624 tf
->event
.event_size
, tf
->event
.data_size
);
1630 /* Take the tf current event offset and use the event id to figure out where is
1631 * the next event offset.
1633 * This is an internal function not aiming at being used elsewhere : it will
1634 * not jump over the current block limits. Please consider using
1635 * ltt_tracefile_read to do this.
1637 * Returns 0 on success
1638 * ERANGE if we are at the end of the buffer.
1639 * ENOPROTOOPT if an error occured when getting the current event size.
1641 static int ltt_seek_next_event(LttTracefile
*tf
)
1646 /* seek over the buffer header if we are at the buffer start */
1647 if(tf
->event
.offset
== 0) {
1648 tf
->event
.offset
+= tf
->buffer_header_size
;
1650 if(tf
->event
.offset
== tf
->buffer
.data_size
) {
1656 pos
= tf
->event
.data
;
1658 if(tf
->event
.data_size
< 0) goto error
;
1660 pos
+= (size_t)tf
->event
.data_size
;
1662 tf
->event
.offset
= pos
- tf
->buffer
.head
;
1664 if(tf
->event
.offset
== tf
->buffer
.data_size
) {
1668 g_assert(tf
->event
.offset
< tf
->buffer
.data_size
);
1674 g_error("Error in ltt_seek_next_event for tracefile %s",
1675 g_quark_to_string(tf
->name
));
1680 /*****************************************************************************
1682 * ltt_get_int : get an integer number
1684 * reverse_byte_order: must we reverse the byte order ?
1685 * size : the size of the integer
1686 * ptr : the data pointer
1688 * gint64 : a 64 bits integer
1689 ****************************************************************************/
1691 gint64
ltt_get_int(gboolean reverse_byte_order
, gint size
, void *data
)
1696 case 1: val
= *((gint8
*)data
); break;
1697 case 2: val
= ltt_get_int16(reverse_byte_order
, data
); break;
1698 case 4: val
= ltt_get_int32(reverse_byte_order
, data
); break;
1699 case 8: val
= ltt_get_int64(reverse_byte_order
, data
); break;
1700 default: val
= ltt_get_int64(reverse_byte_order
, data
);
1701 g_critical("get_int : integer size %d unknown", size
);
1708 /*****************************************************************************
1710 * ltt_get_uint : get an unsigned integer number
1712 * reverse_byte_order: must we reverse the byte order ?
1713 * size : the size of the integer
1714 * ptr : the data pointer
1716 * guint64 : a 64 bits unsigned integer
1717 ****************************************************************************/
1719 guint64
ltt_get_uint(gboolean reverse_byte_order
, gint size
, void *data
)
1724 case 1: val
= *((gint8
*)data
); break;
1725 case 2: val
= ltt_get_uint16(reverse_byte_order
, data
); break;
1726 case 4: val
= ltt_get_uint32(reverse_byte_order
, data
); break;
1727 case 8: val
= ltt_get_uint64(reverse_byte_order
, data
); break;
1728 default: val
= ltt_get_uint64(reverse_byte_order
, data
);
1729 g_critical("get_uint : unsigned integer size %d unknown",
1738 /* get the node name of the system */
1740 char * ltt_trace_system_description_node_name (LttSystemDescription
* s
)
1742 return s
->node_name
;
1746 /* get the domain name of the system */
1748 char * ltt_trace_system_description_domain_name (LttSystemDescription
* s
)
1750 return s
->domain_name
;
1754 /* get the description of the system */
1756 char * ltt_trace_system_description_description (LttSystemDescription
* s
)
1758 return s
->description
;
1762 /* get the NTP corrected start time of the trace */
1763 LttTime
ltt_trace_start_time(LttTrace
*t
)
1765 return t
->start_time
;
1768 /* get the monotonic start time of the trace */
1769 LttTime
ltt_trace_start_time_monotonic(LttTrace
*t
)
1771 return t
->start_time_from_tsc
;
1774 static __attribute__ ((__unused__
)) LttTracefile
*ltt_tracefile_new()
1777 tf
= g_new(LttTracefile
, 1);
1778 tf
->event
.tracefile
= tf
;
1782 static __attribute__ ((__unused__
)) void ltt_tracefile_destroy(LttTracefile
*tf
)
1787 static __attribute__ ((__unused__
)) void ltt_tracefile_copy(LttTracefile
*dest
, const LttTracefile
*src
)
1792 /* Before library loading... */
1794 static __attribute__((constructor
)) void init(void)
1796 LTT_TRACEFILE_NAME_METADATA
= g_quark_from_string("metadata");