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_6
*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
=
175 ltt_time_from_uint64(tsc_to_uint64(t
->freq_scale
,
176 t
->start_freq
, t
->start_tsc
));
181 g_warning("Unsupported trace version : %hhu.%hhu",
182 header
->major_version
, header
->minor_version
);
187 g_warning("Unsupported trace version : %hhu.%hhu",
188 header
->major_version
, header
->minor_version
);
194 int get_block_offset_size(LttTracefile
*tf
, guint block_num
,
195 uint64_t *offset
, uint32_t *size
)
199 if (unlikely(block_num
>= tf
->num_blocks
))
202 offa
= g_array_index(tf
->buf_index
, uint64_t, block_num
);
203 if (likely(block_num
< tf
->num_blocks
- 1))
204 offb
= g_array_index(tf
->buf_index
, uint64_t, block_num
+ 1);
206 offb
= tf
->file_size
;
212 int ltt_trace_create_block_index(LttTracefile
*tf
)
214 int page_size
= getpagesize();
217 unsigned int header_map_size
= PAGE_ALIGN(ltt_subbuffer_header_size());
219 tf
->buf_index
= g_array_sized_new(FALSE
, TRUE
, sizeof(uint64_t),
222 g_assert(tf
->buf_index
->len
== i
);
224 while (offset
< tf
->file_size
) {
225 ltt_subbuffer_header_t
*header
;
228 tf
->buf_index
= g_array_set_size(tf
->buf_index
, i
+ 1);
229 off
= &g_array_index(tf
->buf_index
, uint64_t, i
);
232 /* map block header */
233 header
= mmap(0, header_map_size
, PROT_READ
,
234 MAP_PRIVATE
, tf
->fd
, (off_t
)offset
);
235 if(header
== MAP_FAILED
) {
236 perror("Error in allocating memory for buffer of tracefile");
240 /* read len, offset += len */
241 offset
+= ltt_get_uint32(LTT_GET_BO(tf
), &header
->sb_size
);
243 /* unmap block header */
244 if(munmap(header
, header_map_size
)) {
245 g_warning("unmap size : %u\n", header_map_size
);
246 perror("munmap error");
256 /*****************************************************************************
258 * ltt_tracefile_open : open a trace file, construct a LttTracefile
260 * t : the trace containing the tracefile
261 * fileName : path name of the trace file
262 * tf : the tracefile structure
264 * : 0 for success, -1 otherwise.
265 ****************************************************************************/
267 static gint
ltt_tracefile_open(LttTrace
*t
, gchar
* fileName
, LttTracefile
*tf
)
269 struct stat lTDFStat
; /* Trace data file status */
270 ltt_subbuffer_header_t
*header
;
271 int page_size
= getpagesize();
274 tf
->long_name
= g_quark_from_string(fileName
);
276 tf
->fd
= open(fileName
, O_RDONLY
);
277 tf
->buf_index
= NULL
;
279 g_warning("Unable to open input data file %s\n", fileName
);
283 // Get the file's status
284 if(fstat(tf
->fd
, &lTDFStat
) < 0){
285 g_warning("Unable to get the status of the input data file %s\n", fileName
);
289 // Is the file large enough to contain a trace
290 if(lTDFStat
.st_size
<
291 (off_t
)(ltt_subbuffer_header_size())){
292 g_print("The input data file %s does not contain a trace\n", fileName
);
296 /* Temporarily map the buffer start header to get trace information */
297 /* Multiple of pages aligned head */
298 tf
->buffer
.head
= mmap(0,
299 PAGE_ALIGN(ltt_subbuffer_header_size()), PROT_READ
,
300 MAP_PRIVATE
, tf
->fd
, 0);
301 if(tf
->buffer
.head
== MAP_FAILED
) {
302 perror("Error in allocating memory for buffer of tracefile");
305 g_assert( ( (gulong
)tf
->buffer
.head
&(8-1) ) == 0); // make sure it's aligned.
307 header
= (ltt_subbuffer_header_t
*)tf
->buffer
.head
;
309 if(parse_trace_header(header
, tf
, NULL
)) {
310 g_warning("parse_trace_header error");
314 //store the size of the file
315 tf
->file_size
= lTDFStat
.st_size
;
317 tf
->subbuf_corrupt
= 0;
319 if(munmap(tf
->buffer
.head
,
320 PAGE_ALIGN(ltt_subbuffer_header_size()))) {
321 g_warning("unmap size : %zu\n",
322 PAGE_ALIGN(ltt_subbuffer_header_size()));
323 perror("munmap error");
326 tf
->buffer
.head
= NULL
;
328 /* Create block index */
329 ltt_trace_create_block_index(tf
);
331 //read the first block
332 if(map_block(tf
,0)) {
333 perror("Cannot map block for tracefile");
341 if(munmap(tf
->buffer
.head
,
342 PAGE_ALIGN(ltt_subbuffer_header_size()))) {
343 g_warning("unmap size : %zu\n",
344 PAGE_ALIGN(ltt_subbuffer_header_size()));
345 perror("munmap error");
352 g_array_free(tf
->buf_index
, TRUE
);
357 /*****************************************************************************
359 * ltt_tracefile_close: close a trace file,
361 * t : tracefile which will be closed
362 ****************************************************************************/
364 static void ltt_tracefile_close(LttTracefile
*t
)
366 int page_size
= getpagesize();
368 if(t
->buffer
.head
!= NULL
)
369 if(munmap(t
->buffer
.head
, PAGE_ALIGN(t
->buffer
.size
))) {
370 g_warning("unmap size : %u\n",
371 PAGE_ALIGN(t
->buffer
.size
));
372 perror("munmap error");
378 g_array_free(t
->buf_index
, TRUE
);
381 /****************************************************************************
382 * get_absolute_pathname
384 * return the unique pathname in the system
386 * MD : Fixed this function so it uses realpath, dealing well with
387 * forgotten cases (.. were not used correctly before).
389 ****************************************************************************/
390 void get_absolute_pathname(const gchar
*pathname
, gchar
* abs_pathname
)
392 abs_pathname
[0] = '\0';
394 if (realpath(pathname
, abs_pathname
) != NULL
)
398 /* error, return the original path unmodified */
399 strcpy(abs_pathname
, pathname
);
405 /* Search for something like : .*_.*
407 * The left side is the name, the right side is the number.
409 * Exclude flight- prefix.
412 static int get_tracefile_name_number(gchar
*raw_name
,
419 guint raw_name_len
= strlen(raw_name
);
420 gchar char_name
[PATH_MAX
];
428 for(i
= 0; i
< raw_name_len
-1;i
++) {
429 if(raw_name
[i
] != '/')
432 raw_name
= &raw_name
[i
];
433 raw_name_len
= strlen(raw_name
);
435 for(i
=raw_name_len
-1;i
>=0;i
--) {
436 if(raw_name
[i
] == '_') break;
438 if(i
==-1) { /* Either not found or name length is 0 */
439 /* This is a userspace tracefile */
440 strncpy(char_name
, raw_name
, raw_name_len
);
441 char_name
[raw_name_len
] = '\0';
442 *name
= g_quark_from_string(char_name
);
443 *num
= 0; /* unknown cpu */
444 for(i
=0;i
<raw_name_len
;i
++) {
445 if(raw_name
[i
] == '/') {
450 for(;i
<raw_name_len
;i
++) {
451 if(raw_name
[i
] == '/') {
456 for(;i
<raw_name_len
;i
++) {
457 if(raw_name
[i
] == '-') {
461 if(i
== raw_name_len
) return -1;
463 tmpptr
= &raw_name
[i
];
464 for(;i
<raw_name_len
;i
++) {
465 if(raw_name
[i
] == '.') {
470 *tid
= strtoul(tmpptr
, &endptr
, 10);
472 return -1; /* No digit */
473 if(*tid
== ULONG_MAX
)
474 return -1; /* underflow / overflow */
476 tmpptr
= &raw_name
[i
];
477 for(;i
<raw_name_len
;i
++) {
478 if(raw_name
[i
] == '.') {
483 *pgid
= strtoul(tmpptr
, &endptr
, 10);
485 return -1; /* No digit */
486 if(*pgid
== ULONG_MAX
)
487 return -1; /* underflow / overflow */
489 tmpptr
= &raw_name
[i
];
490 *creation
= strtoull(tmpptr
, &endptr
, 10);
492 return -1; /* No digit */
493 if(*creation
== G_MAXUINT64
)
494 return -1; /* underflow / overflow */
498 cpu_num
= strtol(raw_name
+underscore_pos
+1, &endptr
, 10);
500 if(endptr
== raw_name
+underscore_pos
+1)
501 return -1; /* No digit */
502 if(cpu_num
== LONG_MIN
|| cpu_num
== LONG_MAX
)
503 return -1; /* underflow / overflow */
505 if (!strncmp(raw_name
, "flight-", sizeof("flight-") - 1)) {
506 raw_name
+= sizeof("flight-") - 1;
507 underscore_pos
-= sizeof("flight-") - 1;
509 strncpy(char_name
, raw_name
, underscore_pos
);
510 char_name
[underscore_pos
] = '\0';
511 *name
= g_quark_from_string(char_name
);
520 GData
**ltt_trace_get_tracefiles_groups(LttTrace
*trace
)
522 return &trace
->tracefiles
;
526 void compute_tracefile_group(GQuark key_id
,
528 struct compute_tracefile_group_args
*args
)
533 for(i
=0; i
<group
->len
; i
++) {
534 tf
= &g_array_index (group
, LttTracefile
, i
);
536 args
->func(tf
, args
->func_args
);
541 static void ltt_tracefile_group_destroy(gpointer data
)
543 GArray
*group
= (GArray
*)data
;
547 for(i
=0; i
<group
->len
; i
++) {
548 tf
= &g_array_index (group
, LttTracefile
, i
);
550 destroy_marker_data(tf
->mdata
);
551 ltt_tracefile_close(tf
);
554 g_array_free(group
, TRUE
);
557 static __attribute__ ((__unused__
)) gboolean
ltt_tracefile_group_has_cpu_online(gpointer data
)
559 GArray
*group
= (GArray
*)data
;
563 for(i
=0; i
<group
->len
; i
++) {
564 tf
= &g_array_index (group
, LttTracefile
, i
);
572 /* Open each tracefile under a specific directory. Put them in a
573 * GData : permits to access them using their tracefile group pathname.
574 * i.e. access control/modules tracefile group by index :
577 * relative path is the path relative to the trace root
578 * root path is the full path
580 * A tracefile group is simply an array where all the per cpu tracefiles sit.
583 static int open_tracefiles(LttTrace
*trace
, gchar
*root_path
, gchar
*relative_path
)
585 DIR *dir
= opendir(root_path
);
586 struct dirent
*entry
;
587 struct stat stat_buf
;
590 gchar path
[PATH_MAX
];
595 gchar rel_path
[PATH_MAX
];
598 struct marker_data
**mdata
;
605 strncpy(path
, root_path
, PATH_MAX
-1);
606 path_len
= strlen(path
);
607 path
[path_len
] = '/';
609 path_ptr
= path
+ path_len
;
611 strncpy(rel_path
, relative_path
, PATH_MAX
-1);
612 rel_path_len
= strlen(rel_path
);
613 rel_path
[rel_path_len
] = '/';
615 rel_path_ptr
= rel_path
+ rel_path_len
;
617 while((entry
= readdir(dir
)) != NULL
) {
619 if(entry
->d_name
[0] == '.') continue;
621 strncpy(path_ptr
, entry
->d_name
, PATH_MAX
- path_len
);
622 strncpy(rel_path_ptr
, entry
->d_name
, PATH_MAX
- rel_path_len
);
624 ret
= stat(path
, &stat_buf
);
630 g_debug("Tracefile file or directory : %s\n", path
);
632 // if(strcmp(rel_path, "/eventdefs") == 0) continue;
634 if(S_ISDIR(stat_buf
.st_mode
)) {
636 g_debug("Entering subdirectory...\n");
637 ret
= open_tracefiles(trace
, path
, rel_path
);
638 if(ret
< 0) continue;
639 } else if(S_ISREG(stat_buf
.st_mode
)) {
648 if(get_tracefile_name_number(rel_path
, &name
, &num
, &tid
, &pgid
, &creation
))
649 continue; /* invalid name */
651 g_debug("Opening file.\n");
652 if(ltt_tracefile_open(trace
, path
, &tmp_tf
)) {
653 g_info("Error opening tracefile %s", path
);
655 continue; /* error opening the tracefile : bad magic number ? */
658 g_debug("Tracefile name is %s and number is %u",
659 g_quark_to_string(name
), num
);
661 tmp_tf
.cpu_online
= 1;
662 tmp_tf
.cpu_num
= num
;
666 tmp_tf
.creation
= creation
;
667 group
= g_datalist_id_get_data(&trace
->tracefiles
, name
);
669 /* Elements are automatically cleared when the array is allocated.
670 * It makes the cpu_online variable set to 0 : cpu offline, by default.
672 group
= g_array_sized_new (FALSE
, TRUE
, sizeof(LttTracefile
), 10);
673 g_datalist_id_set_data_full(&trace
->tracefiles
, name
,
674 group
, ltt_tracefile_group_destroy
);
677 /* Add the per cpu tracefile to the named group */
678 unsigned int old_len
= group
->len
;
680 group
= g_array_set_size(group
, num
+1);
682 g_array_index (group
, LttTracefile
, num
) = tmp_tf
;
683 g_array_index (group
, LttTracefile
, num
).event
.tracefile
=
684 &g_array_index (group
, LttTracefile
, num
);
685 mdata
= &g_array_index (group
, LttTracefile
, num
).mdata
;
686 *mdata
= allocate_marker_data();
688 g_error("Error in allocating marker data");
698 /* Presumes the tracefile is already seeked at the beginning. It makes sense,
699 * because it must be done just after the opening */
700 static int ltt_process_metadata_tracefile(LttTracefile
*tf
)
705 err
= ltt_tracefile_read_seek(tf
);
706 if(err
== EPERM
) goto seek_error
;
707 else if(err
== ERANGE
) break; /* End of tracefile */
709 err
= ltt_tracefile_read_update_event(tf
);
710 if(err
) goto update_error
;
713 * It contains only core events :
715 * 1 : set_marker_format
717 if(tf
->event
.event_id
>= MARKER_CORE_IDS
) {
718 /* Should only contain core events */
719 g_warning("Error in processing metadata file %s, "
720 "should not contain event id %u.", g_quark_to_string(tf
->name
),
726 const char *channel_name
, *marker_name
, *format
;
728 guint8 int_size
, long_size
, pointer_size
, size_t_size
, alignment
;
730 switch((enum marker_id
)tf
->event
.event_id
) {
731 case MARKER_ID_SET_MARKER_ID
:
732 channel_name
= pos
= tf
->event
.data
;
733 pos
+= strlen(channel_name
) + 1;
735 g_debug("Doing MARKER_ID_SET_MARKER_ID of marker %s.%s",
736 channel_name
, marker_name
);
737 pos
+= strlen(marker_name
) + 1;
738 pos
+= ltt_align((size_t)pos
, sizeof(guint16
), tf
->alignment
);
739 id
= ltt_get_uint16(LTT_GET_BO(tf
), pos
);
740 g_debug("In MARKER_ID_SET_MARKER_ID of marker %s.%s id %hu",
741 channel_name
, marker_name
, id
);
742 pos
+= sizeof(guint16
);
743 int_size
= *(guint8
*)pos
;
744 pos
+= sizeof(guint8
);
745 long_size
= *(guint8
*)pos
;
746 pos
+= sizeof(guint8
);
747 pointer_size
= *(guint8
*)pos
;
748 pos
+= sizeof(guint8
);
749 size_t_size
= *(guint8
*)pos
;
750 pos
+= sizeof(guint8
);
751 alignment
= *(guint8
*)pos
;
752 pos
+= sizeof(guint8
);
753 marker_id_event(tf
->trace
,
754 g_quark_from_string(channel_name
),
755 g_quark_from_string(marker_name
),
756 id
, int_size
, long_size
,
757 pointer_size
, size_t_size
, alignment
);
759 case MARKER_ID_SET_MARKER_FORMAT
:
760 channel_name
= pos
= tf
->event
.data
;
761 pos
+= strlen(channel_name
) + 1;
763 g_debug("Doing MARKER_ID_SET_MARKER_FORMAT of marker %s.%s",
764 channel_name
, marker_name
);
765 pos
+= strlen(marker_name
) + 1;
767 pos
+= strlen(format
) + 1;
768 marker_format_event(tf
->trace
,
769 g_quark_from_string(channel_name
),
770 g_quark_from_string(marker_name
),
772 /* get information from dictionary TODO */
775 g_warning("Error in processing metadata file %s, "
776 "unknown event id %hhu.",
777 g_quark_to_string(tf
->name
),
790 g_warning("An error occured in metadata tracefile parsing");
795 * Open a trace and return its LttTrace handle.
797 * pathname must be the directory of the trace
800 LttTrace
*ltt_trace_open(const gchar
*pathname
)
802 gchar abs_path
[PATH_MAX
];
808 ltt_subbuffer_header_t
*header
;
810 struct dirent
*entry
;
811 struct stat stat_buf
;
812 gchar path
[PATH_MAX
];
814 t
= g_new(LttTrace
, 1);
815 if(!t
) goto alloc_error
;
817 get_absolute_pathname(pathname
, abs_path
);
818 t
->pathname
= g_quark_from_string(abs_path
);
820 g_datalist_init(&t
->tracefiles
);
822 /* Test to see if it looks like a trace */
823 dir
= opendir(abs_path
);
828 while((entry
= readdir(dir
)) != NULL
) {
829 strcpy(path
, abs_path
);
831 strcat(path
, entry
->d_name
);
832 ret
= stat(path
, &stat_buf
);
840 /* Open all the tracefiles */
842 if(open_tracefiles(t
, abs_path
, "")) {
843 g_warning("Error opening tracefile %s", abs_path
);
847 /* Parse each trace metadata_N files : get runtime fac. info */
848 group
= g_datalist_id_get_data(&t
->tracefiles
, LTT_TRACEFILE_NAME_METADATA
);
850 g_warning("Trace %s has no metadata tracefile", abs_path
);
855 * Get the trace information for the metadata_0 tracefile.
856 * Getting a correct trace start_time and start_tsc is insured by the fact
857 * that no subbuffers are supposed to be lost in the metadata channel.
858 * Therefore, the first subbuffer contains the start_tsc timestamp in its
861 g_assert(group
->len
> 0);
862 tf
= &g_array_index (group
, LttTracefile
, 0);
863 header
= (ltt_subbuffer_header_t
*)tf
->buffer
.head
;
864 ret
= parse_trace_header(header
, tf
, t
);
867 t
->num_cpu
= group
->len
;
871 //ret = allocate_marker_data(t);
873 // g_error("Error in allocating marker data");
875 for(i
=0; i
<group
->len
; i
++) {
876 tf
= &g_array_index (group
, LttTracefile
, i
);
878 if(ltt_process_metadata_tracefile(tf
))
880 // goto metadata_error;
887 // destroy_marker_data(t);
889 g_datalist_clear(&t
->tracefiles
);
897 /* Open another, completely independant, instance of a trace.
899 * A read on this new instance will read the first event of the trace.
901 * When we copy a trace, we want all the opening actions to happen again :
902 * the trace will be reopened and totally independant from the original.
903 * That's why we call ltt_trace_open.
905 LttTrace
*ltt_trace_copy(LttTrace
*self
)
907 return ltt_trace_open(g_quark_to_string(self
->pathname
));
914 void ltt_trace_close(LttTrace
*t
)
916 g_datalist_clear(&t
->tracefiles
);
921 /*****************************************************************************
922 * Get the start time and end time of the trace
923 ****************************************************************************/
925 void ltt_tracefile_time_span_get(LttTracefile
*tf
,
926 LttTime
*start
, LttTime
*end
)
930 err
= map_block(tf
, 0);
932 g_error("Can not map block");
933 *start
= ltt_time_infinite
;
935 *start
= tf
->buffer
.begin
.timestamp
;
937 err
= map_block(tf
, tf
->num_blocks
- 1); /* Last block */
939 g_error("Can not map block");
940 *end
= ltt_time_zero
;
942 *end
= tf
->buffer
.end
.timestamp
;
944 g_assert(end
->tv_sec
<= G_MAXUINT
);
947 struct tracefile_time_span_get_args
{
953 static void group_time_span_get(GQuark name
, gpointer data
, gpointer user_data
)
955 struct tracefile_time_span_get_args
*args
=
956 (struct tracefile_time_span_get_args
*)user_data
;
958 GArray
*group
= (GArray
*)data
;
964 for(i
=0; i
<group
->len
; i
++) {
965 tf
= &g_array_index (group
, LttTracefile
, i
);
967 ltt_tracefile_time_span_get(tf
, &tmp_start
, &tmp_end
);
968 if(ltt_time_compare(*args
->start
, tmp_start
)>0) *args
->start
= tmp_start
;
969 if(ltt_time_compare(*args
->end
, tmp_end
)<0) *args
->end
= tmp_end
;
974 /* return the start and end time of a trace */
976 void ltt_trace_time_span_get(LttTrace
*t
, LttTime
*start
, LttTime
*end
)
978 LttTime min_start
= ltt_time_infinite
;
979 LttTime max_end
= ltt_time_zero
;
980 struct tracefile_time_span_get_args args
= { t
, &min_start
, &max_end
};
982 g_datalist_foreach(&t
->tracefiles
, &group_time_span_get
, &args
);
984 if(start
!= NULL
) *start
= min_start
;
985 if(end
!= NULL
) *end
= max_end
;
990 /* Seek to the first event in a tracefile that has a time equal or greater than
991 * the time passed in parameter.
993 * If the time parameter is outside the tracefile time span, seek to the first
994 * event or if after, return ERANGE.
996 * If the time parameter is before the first event, we have to seek specially to
999 * If the time is after the end of the trace, return ERANGE.
1001 * Do a binary search to find the right block, then a sequential search in the
1002 * block to find the event.
1004 * In the special case where the time requested fits inside a block that has no
1005 * event corresponding to the requested time, the first event of the next block
1008 * IMPORTANT NOTE : // FIXME everywhere...
1010 * You MUST NOT do a ltt_tracefile_read right after a ltt_tracefile_seek_time :
1011 * you will jump over an event if you do.
1013 * Return value : 0 : no error, the tf->event can be used
1014 * ERANGE : time if after the last event of the trace
1015 * otherwise : this is an error.
1019 int ltt_tracefile_seek_time(LttTracefile
*tf
, LttTime time
)
1023 unsigned int block_num
, high
, low
;
1025 /* seek at the beginning of trace */
1026 err
= map_block(tf
, 0); /* First block */
1028 g_error("Can not map block");
1032 /* If the time is lower or equal the beginning of the trace,
1033 * go to the first event. */
1034 if(ltt_time_compare(time
, tf
->buffer
.begin
.timestamp
) <= 0) {
1035 ret
= ltt_tracefile_read(tf
);
1036 if(ret
== ERANGE
) goto range
;
1037 else if (ret
) goto fail
;
1038 goto found
; /* There is either no event in the trace or the event points
1039 to the first event in the trace */
1042 err
= map_block(tf
, tf
->num_blocks
- 1); /* Last block */
1044 g_error("Can not map block");
1048 /* If the time is after the end of the trace, return ERANGE. */
1049 if(ltt_time_compare(time
, tf
->buffer
.end
.timestamp
) > 0) {
1053 /* Binary search the block */
1054 high
= tf
->num_blocks
- 1;
1058 block_num
= ((high
-low
) / 2) + low
;
1060 err
= map_block(tf
, block_num
);
1062 g_error("Can not map block");
1066 /* We cannot divide anymore : this is what would happen if the time
1067 * requested was exactly between two consecutive buffers'end and start
1068 * timestamps. This is also what would happend if we didn't deal with out
1069 * of span cases prior in this function. */
1070 /* The event is right in the buffer!
1071 * (or in the next buffer first event) */
1073 ret
= ltt_tracefile_read(tf
);
1074 if(ret
== ERANGE
) goto range
; /* ERANGE or EPERM */
1075 else if(ret
) goto fail
;
1077 if(ltt_time_compare(time
, tf
->event
.event_time
) <= 0)
1081 } else if(ltt_time_compare(time
, tf
->buffer
.begin
.timestamp
) < 0) {
1082 /* go to lower part */
1083 high
= block_num
- 1;
1084 } else if(ltt_time_compare(time
, tf
->buffer
.end
.timestamp
) > 0) {
1085 /* go to higher part */
1086 low
= block_num
+ 1;
1087 } else {/* The event is right in the buffer!
1088 (or in the next buffer first event) */
1090 ret
= ltt_tracefile_read(tf
);
1091 if(ret
== ERANGE
) goto range
; /* ERANGE or EPERM */
1092 else if(ret
) goto fail
;
1094 if(ltt_time_compare(time
, tf
->event
.event_time
) <= 0)
1106 /* Error handling */
1108 g_error("ltt_tracefile_seek_time failed on tracefile %s",
1109 g_quark_to_string(tf
->name
));
1113 /* Seek to a position indicated by an LttEventPosition
1116 int ltt_tracefile_seek_position(LttTracefile
*tf
, const LttEventPosition
*ep
)
1120 if(ep
->tracefile
!= tf
) {
1124 err
= map_block(tf
, ep
->block
);
1126 g_error("Can not map block");
1130 tf
->event
.offset
= ep
->offset
;
1132 /* Put back the event real tsc */
1133 tf
->event
.tsc
= ep
->tsc
;
1134 tf
->buffer
.tsc
= ep
->tsc
;
1136 err
= ltt_tracefile_read_update_event(tf
);
1139 /* deactivate this, as it does nothing for now
1140 err = ltt_tracefile_read_op(tf);
1147 g_error("ltt_tracefile_seek_time failed on tracefile %s",
1148 g_quark_to_string(tf
->name
));
1153 * Convert a value in "TSC scale" to a value in nanoseconds
1155 guint64
tsc_to_uint64(guint32 freq_scale
, uint64_t start_freq
, guint64 tsc
)
1157 return (double) tsc
* NANOSECONDS_PER_SECOND
* freq_scale
/ start_freq
;
1160 /* Given a TSC value, return the LttTime (seconds,nanoseconds) it
1163 LttTime
ltt_interpolate_time_from_tsc(LttTracefile
*tf
, guint64 tsc
)
1165 return ltt_time_from_uint64(tsc_to_uint64(tf
->trace
->freq_scale
,
1166 tf
->trace
->start_freq
, tf
->trace
->drift
* tsc
+
1167 tf
->trace
->offset
));
1170 /* Calculate the real event time based on the buffer boundaries */
1171 LttTime
ltt_interpolate_time(LttTracefile
*tf
, LttEvent
*event
)
1173 return ltt_interpolate_time_from_tsc(tf
, tf
->buffer
.tsc
);
1177 /* Get the current event of the tracefile : valid until the next read */
1178 LttEvent
*ltt_tracefile_get_event(LttTracefile
*tf
)
1185 /*****************************************************************************
1187 * ltt_tracefile_read : Read the next event in the tracefile
1192 * Returns 0 if an event can be used in tf->event.
1193 * Returns ERANGE on end of trace. The event in tf->event still can be used
1194 * (if the last block was not empty).
1195 * Returns EPERM on error.
1197 * This function does make the tracefile event structure point to the event
1198 * currently pointed to by the tf->event.
1200 * Note : you must call a ltt_tracefile_seek to the beginning of the trace to
1201 * reinitialize it after an error if you want results to be coherent.
1202 * It would be the case if a end of trace last buffer has no event : the end
1203 * of trace wouldn't be returned, but an error.
1204 * We make the assumption there is at least one event per buffer.
1205 ****************************************************************************/
1207 int ltt_tracefile_read(LttTracefile
*tf
)
1211 err
= ltt_tracefile_read_seek(tf
);
1213 err
= ltt_tracefile_read_update_event(tf
);
1216 /* deactivate this, as it does nothing for now
1217 err = ltt_tracefile_read_op(tf);
1224 int ltt_tracefile_read_seek(LttTracefile
*tf
)
1228 /* Get next buffer until we finally have an event, or end of trace */
1230 err
= ltt_seek_next_event(tf
);
1231 if(unlikely(err
== ENOPROTOOPT
)) {
1235 /* Are we at the end of the buffer ? */
1237 if(unlikely(tf
->buffer
.index
== tf
->num_blocks
-1)){ /* end of trace ? */
1240 /* get next block */
1241 err
= map_block(tf
, tf
->buffer
.index
+ 1);
1243 g_error("Can not map block");
1247 } else break; /* We found an event ! */
1253 /* do an operation when reading a new event */
1255 /* This function does nothing for now */
1257 int ltt_tracefile_read_op(LttTracefile
*tf
)
1263 /* do event specific operation */
1271 static void print_debug_event_header(LttEvent
*ev
, void *start_pos
, void *end_pos
)
1273 unsigned int offset
= 0;
1276 g_printf("Event header (tracefile %s offset %" PRIx64
"):\n",
1277 g_quark_to_string(ev
->tracefile
->long_name
),
1278 (uint64_t)ev
->tracefile
->buffer
.offset
+
1279 (long)start_pos
- (long)ev
->tracefile
->buffer
.head
);
1281 while (offset
< (long)end_pos
- (long)start_pos
) {
1282 g_printf("%8lx", (long)start_pos
- (long)ev
->tracefile
->buffer
.head
+ offset
);
1285 for (i
= 0; i
< 4 ; i
++) {
1286 for (j
= 0; j
< 4; j
++) {
1287 if (offset
+ ((i
* 4) + j
) <
1288 (long)end_pos
- (long)start_pos
)
1290 ((char*)start_pos
)[offset
+ ((i
* 4) + j
)]);
1304 /* same as ltt_tracefile_read, but does not seek to the next event nor call
1305 * event specific operation. */
1306 int ltt_tracefile_read_update_event(LttTracefile
*tf
)
1311 guint16 packed_evid
; /* event id reader from the 5 bits in header */
1314 pos
= tf
->buffer
.head
+ event
->offset
;
1316 /* Read event header */
1318 /* Align the head */
1319 pos
+= ltt_align((size_t)pos
, sizeof(guint32
), tf
->alignment
);
1322 event
->timestamp
= ltt_get_uint32(LTT_GET_BO(tf
), pos
);
1323 event
->event_id
= packed_evid
= event
->timestamp
>> tf
->tscbits
;
1324 event
->timestamp
= event
->timestamp
& tf
->tsc_mask
;
1325 pos
+= sizeof(guint32
);
1327 switch (packed_evid
) {
1328 case 29: /* LTT_RFLAG_ID_SIZE_TSC */
1329 event
->event_id
= ltt_get_uint16(LTT_GET_BO(tf
), pos
);
1330 pos
+= sizeof(guint16
);
1331 event
->event_size
= ltt_get_uint16(LTT_GET_BO(tf
), pos
);
1332 pos
+= sizeof(guint16
);
1333 if (event
->event_size
== 0xFFFF) {
1334 event
->event_size
= ltt_get_uint32(LTT_GET_BO(tf
), pos
);
1335 pos
+= sizeof(guint32
);
1337 pos
+= ltt_align((size_t)pos
, sizeof(guint64
), tf
->alignment
);
1338 tf
->buffer
.tsc
= ltt_get_uint64(LTT_GET_BO(tf
), pos
);
1339 pos
+= sizeof(guint64
);
1341 case 30: /* LTT_RFLAG_ID_SIZE */
1342 event
->event_id
= ltt_get_uint16(LTT_GET_BO(tf
), pos
);
1343 pos
+= sizeof(guint16
);
1344 event
->event_size
= ltt_get_uint16(LTT_GET_BO(tf
), pos
);
1345 pos
+= sizeof(guint16
);
1346 if (event
->event_size
== 0xFFFF) {
1347 event
->event_size
= ltt_get_uint32(LTT_GET_BO(tf
), pos
);
1348 pos
+= sizeof(guint32
);
1351 case 31: /* LTT_RFLAG_ID */
1352 event
->event_id
= ltt_get_uint16(LTT_GET_BO(tf
), pos
);
1353 pos
+= sizeof(guint16
);
1354 event
->event_size
= G_MAXUINT
;
1357 event
->event_size
= G_MAXUINT
;
1361 if (likely(packed_evid
!= 29)) {
1362 /* No extended timestamp */
1363 if (event
->timestamp
< (tf
->buffer
.tsc
& tf
->tsc_mask
))
1364 tf
->buffer
.tsc
= ((tf
->buffer
.tsc
& ~tf
->tsc_mask
) /* overflow */
1365 + tf
->tsc_mask_next_bit
)
1366 | (guint64
)event
->timestamp
;
1368 tf
->buffer
.tsc
= (tf
->buffer
.tsc
& ~tf
->tsc_mask
) /* no overflow */
1369 | (guint64
)event
->timestamp
;
1371 event
->tsc
= tf
->buffer
.tsc
;
1373 event
->event_time
= ltt_interpolate_time(tf
, event
);
1376 print_debug_event_header(event
, pos_aligned
, pos
);
1381 * Let ltt_update_event_size update event->data according to the largest
1382 * alignment within the payload.
1383 * Get the data size and update the event fields with the current
1385 ltt_update_event_size(tf
);
1391 /****************************************************************************
1393 * map_block : map a block from the file
1395 * lttdes : ltt trace file
1396 * whichBlock : the block which will be read
1399 * EINVAL : lseek fail
1400 * EIO : can not read from the file
1401 ****************************************************************************/
1403 static gint
map_block(LttTracefile
* tf
, guint block_num
)
1405 int page_size
= getpagesize();
1406 ltt_subbuffer_header_t
*header
;
1411 g_assert(block_num
< tf
->num_blocks
);
1413 if(tf
->buffer
.head
!= NULL
) {
1414 if(munmap(tf
->buffer
.head
, PAGE_ALIGN(tf
->buffer
.size
))) {
1415 g_warning("unmap size : %u\n",
1416 PAGE_ALIGN(tf
->buffer
.size
));
1417 perror("munmap error");
1422 ret
= get_block_offset_size(tf
, block_num
, &offset
, &size
);
1425 g_debug("Map block %u, offset %llu, size %u\n", block_num
,
1426 (unsigned long long)offset
, (unsigned int)size
);
1428 /* Multiple of pages aligned head */
1429 tf
->buffer
.head
= mmap(0, (size_t)size
, PROT_READ
, MAP_PRIVATE
,
1430 tf
->fd
, (off_t
)offset
);
1432 if(tf
->buffer
.head
== MAP_FAILED
) {
1433 perror("Error in allocating memory for buffer of tracefile");
1437 g_assert( ( (gulong
)tf
->buffer
.head
&(8-1) ) == 0); // make sure it's aligned.
1439 tf
->buffer
.index
= block_num
;
1441 header
= (ltt_subbuffer_header_t
*)tf
->buffer
.head
;
1443 tf
->buffer
.begin
.cycle_count
= ltt_get_uint64(LTT_GET_BO(tf
),
1444 &header
->cycle_count_begin
);
1445 tf
->buffer
.end
.cycle_count
= ltt_get_uint64(LTT_GET_BO(tf
),
1446 &header
->cycle_count_end
);
1447 tf
->buffer
.offset
= offset
;
1448 tf
->buffer
.size
= ltt_get_uint32(LTT_GET_BO(tf
),
1450 tf
->buffer
.data_size
= ltt_get_uint32(LTT_GET_BO(tf
),
1451 &header
->data_size
);
1452 tf
->buffer
.tsc
= tf
->buffer
.begin
.cycle_count
;
1453 tf
->event
.tsc
= tf
->buffer
.tsc
;
1454 tf
->buffer
.freq
= tf
->buffer
.begin
.freq
;
1456 g_assert(size
== tf
->buffer
.size
);
1457 g_assert(tf
->buffer
.data_size
<= tf
->buffer
.size
);
1459 if (tf
->trace
->start_freq
)
1461 tf
->buffer
.begin
.freq
= tf
->trace
->start_freq
;
1462 tf
->buffer
.begin
.timestamp
= ltt_interpolate_time_from_tsc(tf
,
1463 tf
->buffer
.begin
.cycle_count
);
1464 tf
->buffer
.end
.freq
= tf
->trace
->start_freq
;
1465 tf
->buffer
.end
.timestamp
= ltt_interpolate_time_from_tsc(tf
,
1466 tf
->buffer
.end
.cycle_count
);
1469 /* Make the current event point to the beginning of the buffer :
1470 * it means that the event read must get the first event. */
1471 tf
->event
.tracefile
= tf
;
1472 tf
->event
.block
= block_num
;
1473 tf
->event
.offset
= 0;
1475 if (header
->events_lost
) {
1476 g_warning("%d events lost so far in tracefile %s at block %u",
1477 (guint
)header
->events_lost
,
1478 g_quark_to_string(tf
->long_name
),
1480 tf
->events_lost
= header
->events_lost
;
1482 if (header
->subbuf_corrupt
) {
1483 g_warning("%d subbuffer(s) corrupted so far in tracefile %s at block %u",
1484 (guint
)header
->subbuf_corrupt
,
1485 g_quark_to_string(tf
->long_name
),
1487 tf
->subbuf_corrupt
= header
->subbuf_corrupt
;
1496 static void print_debug_event_data(LttEvent
*ev
)
1498 unsigned int offset
= 0;
1501 if (!max(ev
->event_size
, ev
->data_size
))
1504 g_printf("Event data (tracefile %s offset %" PRIx64
"):\n",
1505 g_quark_to_string(ev
->tracefile
->long_name
),
1506 (uint64_t)ev
->tracefile
->buffer
.offset
1507 + (long)ev
->data
- (long)ev
->tracefile
->buffer
.head
);
1509 while (offset
< max(ev
->event_size
, ev
->data_size
)) {
1510 g_printf("%8lx", (long)ev
->data
+ offset
1511 - (long)ev
->tracefile
->buffer
.head
);
1514 for (i
= 0; i
< 4 ; i
++) {
1515 for (j
= 0; j
< 4; j
++) {
1516 if (offset
+ ((i
* 4) + j
) < max(ev
->event_size
, ev
->data_size
))
1517 g_printf("%02hhX", ((char*)ev
->data
)[offset
+ ((i
* 4) + j
)]);
1528 for (i
= 0; i
< 4; i
++) {
1529 for (j
= 0; j
< 4; j
++) {
1530 if (offset
+ ((i
* 4) + j
) < max(ev
->event_size
, ev
->data_size
)) {
1531 if (isprint(((char*)ev
->data
)[offset
+ ((i
* 4) + j
)]))
1532 g_printf("%c", ((char*)ev
->data
)[offset
+ ((i
* 4) + j
)]);
1544 /* It will update the fields offsets too */
1545 void ltt_update_event_size(LttTracefile
*tf
)
1548 struct marker_info
*info
;
1550 if (tf
->name
== LTT_TRACEFILE_NAME_METADATA
) {
1551 switch((enum marker_id
)tf
->event
.event_id
) {
1552 case MARKER_ID_SET_MARKER_ID
:
1553 size
= strlen((char*)tf
->event
.data
) + 1;
1554 g_debug("marker %s id set", (char*)tf
->event
.data
+ size
);
1555 size
+= strlen((char*)tf
->event
.data
+ size
) + 1;
1556 size
+= ltt_align(size
, sizeof(guint16
), tf
->alignment
);
1557 size
+= sizeof(guint16
);
1558 size
+= sizeof(guint8
);
1559 size
+= sizeof(guint8
);
1560 size
+= sizeof(guint8
);
1561 size
+= sizeof(guint8
);
1562 size
+= sizeof(guint8
);
1564 case MARKER_ID_SET_MARKER_FORMAT
:
1565 size
= strlen((char*)tf
->event
.data
) + 1;
1566 g_debug("marker %s format set", (char*)tf
->event
.data
);
1567 size
+= strlen((char*)tf
->event
.data
+ size
) + 1;
1568 size
+= strlen((char*)tf
->event
.data
+ size
) + 1;
1573 info
= marker_get_info_from_id(tf
->mdata
, tf
->event
.event_id
);
1575 if (tf
->event
.event_id
>= MARKER_CORE_IDS
)
1576 g_assert(info
!= NULL
);
1578 /* Do not update field offsets of core markers when initially reading the
1579 * metadata tracefile when the infos about these markers do not exist yet.
1581 if (likely(info
&& info
->fields
)) {
1583 tf
->event
.data
+= ltt_align((off_t
)(unsigned long)tf
->event
.data
,
1584 info
->largest_align
,
1586 /* size, dynamically computed */
1587 if (info
->size
!= -1)
1590 size
= marker_update_fields_offsets(marker_get_info_from_id(tf
->mdata
,
1591 tf
->event
.event_id
), tf
->event
.data
);
1594 tf
->event
.data_size
= size
;
1596 /* Check consistency between kernel and LTTV structure sizes */
1597 if(tf
->event
.event_size
== G_MAXUINT
) {
1598 /* Event size too big to fit in the event size field */
1599 tf
->event
.event_size
= tf
->event
.data_size
;
1603 print_debug_event_data(&tf
->event
);
1605 if (tf
->event
.data_size
!= tf
->event
.event_size
) {
1606 struct marker_info
*info
= marker_get_info_from_id(tf
->mdata
,
1607 tf
->event
.event_id
);
1609 g_error("Undescribed event %hhu in channel %s", tf
->event
.event_id
,
1610 g_quark_to_string(tf
->name
));
1611 g_error("Kernel/LTTV event size differs for event %s: kernel %u, LTTV %u",
1612 g_quark_to_string(info
->name
),
1613 tf
->event
.event_size
, tf
->event
.data_size
);
1619 /* Take the tf current event offset and use the event id to figure out where is
1620 * the next event offset.
1622 * This is an internal function not aiming at being used elsewhere : it will
1623 * not jump over the current block limits. Please consider using
1624 * ltt_tracefile_read to do this.
1626 * Returns 0 on success
1627 * ERANGE if we are at the end of the buffer.
1628 * ENOPROTOOPT if an error occured when getting the current event size.
1630 static int ltt_seek_next_event(LttTracefile
*tf
)
1635 /* seek over the buffer header if we are at the buffer start */
1636 if(tf
->event
.offset
== 0) {
1637 tf
->event
.offset
+= tf
->buffer_header_size
;
1639 if(tf
->event
.offset
== tf
->buffer
.data_size
) {
1645 pos
= tf
->event
.data
;
1647 if(tf
->event
.data_size
< 0) goto error
;
1649 pos
+= (size_t)tf
->event
.data_size
;
1651 tf
->event
.offset
= pos
- tf
->buffer
.head
;
1653 if(tf
->event
.offset
== tf
->buffer
.data_size
) {
1657 g_assert(tf
->event
.offset
< tf
->buffer
.data_size
);
1663 g_error("Error in ltt_seek_next_event for tracefile %s",
1664 g_quark_to_string(tf
->name
));
1669 /*****************************************************************************
1671 * ltt_get_int : get an integer number
1673 * reverse_byte_order: must we reverse the byte order ?
1674 * size : the size of the integer
1675 * ptr : the data pointer
1677 * gint64 : a 64 bits integer
1678 ****************************************************************************/
1680 gint64
ltt_get_int(gboolean reverse_byte_order
, gint size
, void *data
)
1685 case 1: val
= *((gint8
*)data
); break;
1686 case 2: val
= ltt_get_int16(reverse_byte_order
, data
); break;
1687 case 4: val
= ltt_get_int32(reverse_byte_order
, data
); break;
1688 case 8: val
= ltt_get_int64(reverse_byte_order
, data
); break;
1689 default: val
= ltt_get_int64(reverse_byte_order
, data
);
1690 g_critical("get_int : integer size %d unknown", size
);
1697 /*****************************************************************************
1699 * ltt_get_uint : get an unsigned integer number
1701 * reverse_byte_order: must we reverse the byte order ?
1702 * size : the size of the integer
1703 * ptr : the data pointer
1705 * guint64 : a 64 bits unsigned integer
1706 ****************************************************************************/
1708 guint64
ltt_get_uint(gboolean reverse_byte_order
, gint size
, void *data
)
1713 case 1: val
= *((gint8
*)data
); break;
1714 case 2: val
= ltt_get_uint16(reverse_byte_order
, data
); break;
1715 case 4: val
= ltt_get_uint32(reverse_byte_order
, data
); break;
1716 case 8: val
= ltt_get_uint64(reverse_byte_order
, data
); break;
1717 default: val
= ltt_get_uint64(reverse_byte_order
, data
);
1718 g_critical("get_uint : unsigned integer size %d unknown",
1727 /* get the node name of the system */
1729 char * ltt_trace_system_description_node_name (LttSystemDescription
* s
)
1731 return s
->node_name
;
1735 /* get the domain name of the system */
1737 char * ltt_trace_system_description_domain_name (LttSystemDescription
* s
)
1739 return s
->domain_name
;
1743 /* get the description of the system */
1745 char * ltt_trace_system_description_description (LttSystemDescription
* s
)
1747 return s
->description
;
1751 /* get the NTP corrected start time of the trace */
1752 LttTime
ltt_trace_start_time(LttTrace
*t
)
1754 return t
->start_time
;
1757 /* get the monotonic start time of the trace */
1758 LttTime
ltt_trace_start_time_monotonic(LttTrace
*t
)
1760 return t
->start_time_from_tsc
;
1763 static __attribute__ ((__unused__
)) LttTracefile
*ltt_tracefile_new()
1766 tf
= g_new(LttTracefile
, 1);
1767 tf
->event
.tracefile
= tf
;
1771 static __attribute__ ((__unused__
)) void ltt_tracefile_destroy(LttTracefile
*tf
)
1776 static __attribute__ ((__unused__
)) void ltt_tracefile_copy(LttTracefile
*dest
, const LttTracefile
*src
)
1781 /* Before library loading... */
1783 static __attribute__((constructor
)) void init(void)
1785 LTT_TRACEFILE_NAME_METADATA
= g_quark_from_string("metadata");
1788 /*****************************************************************************
1790 * ltt_tracefile_open_header : based on ltt_tracefile_open but it stops
1791 * when it gets the header
1793 * fileName : path to the tracefile
1794 * tf : the tracefile (metadata_0) where the header will be read
1796 * ltt_subbuffer_header_t : the header containing the version number
1797 ****************************************************************************/
1798 static ltt_subbuffer_header_t
* ltt_tracefile_open_header(gchar
*fileName
, LttTracefile
*tf
)
1800 struct stat lTDFStat
; /* Trace data file status */
1801 ltt_subbuffer_header_t
*header
;
1802 int page_size
= getpagesize();
1805 tf
->long_name
= g_quark_from_string(fileName
);
1806 tf
->fd
= open(fileName
, O_RDONLY
);
1808 g_warning("Unable to open input data file %s\n", fileName
);
1812 /* Get the file's status */
1813 if(fstat(tf
->fd
, &lTDFStat
) < 0){
1814 g_warning("Unable to get the status of the input data file %s\n", fileName
);
1818 /* Is the file large enough to contain a trace */
1819 if(lTDFStat
.st_size
< (off_t
)(ltt_subbuffer_header_size())) {
1820 g_print("The input data file %s does not contain a trace\n", fileName
);
1824 /* Temporarily map the buffer start header to get trace information */
1825 /* Multiple of pages aligned head */
1826 tf
->buffer
.head
= mmap(0,PAGE_ALIGN(ltt_subbuffer_header_size()), PROT_READ
, MAP_PRIVATE
, tf
->fd
, 0);
1828 if(tf
->buffer
.head
== MAP_FAILED
) {
1829 perror("Error in allocating memory for buffer of tracefile");
1832 g_assert( ( (gulong
)tf
->buffer
.head
&(8-1) ) == 0); // make sure it's aligned.
1834 header
= (ltt_subbuffer_header_t
*)tf
->buffer
.head
;
1845 /*****************************************************************************
1847 * get_version : get the trace version from a metadata_0 trace file
1849 * pathname : path to the trace
1850 * version_number : the struct that will get the version number
1852 * int : 1 if succeed, -1 if error
1853 ****************************************************************************/
1854 int ltt_get_trace_version(const gchar
*pathname
, struct LttTraceVersion
*version_number
)
1856 gchar abs_path
[PATH_MAX
];
1859 struct dirent
*entry
;
1860 struct stat stat_buf
;
1861 gchar path
[PATH_MAX
];
1863 LttTracefile tmp_tf
;
1865 ltt_subbuffer_header_t
*header
;
1867 t
= g_new(LttTrace
, 1);
1869 get_absolute_pathname(pathname
, abs_path
);
1871 /* Test to see if it looks like a trace */
1872 dir
= opendir(abs_path
);
1879 while((entry
= readdir(dir
)) != NULL
) {
1880 strcpy(path
, abs_path
);
1882 strcat(path
, entry
->d_name
);
1883 ret
= stat(path
, &stat_buf
);
1891 dir
= opendir(abs_path
);
1893 while((entry
= readdir(dir
)) != NULL
) {
1894 if(entry
->d_name
[0] == '.') continue;
1895 if(g_strcmp0(entry
->d_name
, "metadata_0") != 0) continue;
1897 strcpy(path
, abs_path
);
1899 strcat(path
, entry
->d_name
);
1905 header
= ltt_tracefile_open_header(path
, &tmp_tf
);
1907 if(header
== NULL
) {
1908 g_info("Error getting the header %s", path
);
1909 continue; /* error opening the tracefile : bad magic number ? */
1912 version_number
->ltt_major_version
= header
->major_version
;
1913 version_number
->ltt_minor_version
= header
->minor_version
;