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 */
97 static guint32
calc_nsecs_per_cycle(LttTracefile
* t
);
98 static guint64
cycles_2_ns(LttTracefile
*tf
, guint64 cycles
);
101 /* go to the next event */
102 static int ltt_seek_next_event(LttTracefile
*tf
);
104 void ltt_update_event_size(LttTracefile
*tf
);
107 /* Functions to parse system.xml file (using glib xml parser) */
108 static void parser_start_element (GMarkupParseContext __UNUSED__
*context
,
109 const gchar
*element_name
,
110 const gchar
**attribute_names
,
111 const gchar
**attribute_values
,
116 LttSystemDescription
* des
= (LttSystemDescription
* )user_data
;
117 if(strcmp("system", element_name
)){
118 *error
= g_error_new(G_MARKUP_ERROR
,
120 "This is not system.xml file");
124 while(attribute_names
[i
]){
125 if(strcmp("node_name", attribute_names
[i
])==0){
126 des
->node_name
= g_strdup(attribute_values
[i
]);
127 }else if(strcmp("domainname", attribute_names
[i
])==0){
128 des
->domain_name
= g_strdup(attribute_values
[i
]);
129 }else if(strcmp("cpu", attribute_names
[i
])==0){
130 des
->nb_cpu
= atoi(attribute_values
[i
]);
131 }else if(strcmp("arch_size", attribute_names
[i
])==0){
132 if(strcmp(attribute_values
[i
],"LP32") == 0) des
->size
= LTT_LP32
;
133 else if(strcmp(attribute_values
[i
],"ILP32") == 0) des
->size
= LTT_ILP32
;
134 else if(strcmp(attribute_values
[i
],"LP64") == 0) des
->size
= LTT_LP64
;
135 else if(strcmp(attribute_values
[i
],"ILP64") == 0) des
->size
= LTT_ILP64
;
136 else if(strcmp(attribute_values
[i
],"UNKNOWN") == 0) des
->size
= LTT_UNKNOWN
;
137 }else if(strcmp("endian", attribute_names
[i
])==0){
138 if(strcmp(attribute_values
[i
],"LITTLE_ENDIAN") == 0)
139 des
->endian
= LTT_LITTLE_ENDIAN
;
140 else if(strcmp(attribute_values
[i
],"BIG_ENDIAN") == 0)
141 des
->endian
= LTT_BIG_ENDIAN
;
142 }else if(strcmp("kernel_name", attribute_names
[i
])==0){
143 des
->kernel_name
= g_strdup(attribute_values
[i
]);
144 }else if(strcmp("kernel_release", attribute_names
[i
])==0){
145 des
->kernel_release
= g_strdup(attribute_values
[i
]);
146 }else if(strcmp("kernel_version", attribute_names
[i
])==0){
147 des
->kernel_version
= g_strdup(attribute_values
[i
]);
148 }else if(strcmp("machine", attribute_names
[i
])==0){
149 des
->machine
= g_strdup(attribute_values
[i
]);
150 }else if(strcmp("processor", attribute_names
[i
])==0){
151 des
->processor
= g_strdup(attribute_values
[i
]);
152 }else if(strcmp("hardware_platform", attribute_names
[i
])==0){
153 des
->hardware_platform
= g_strdup(attribute_values
[i
]);
154 }else if(strcmp("operating_system", attribute_names
[i
])==0){
155 des
->operating_system
= g_strdup(attribute_values
[i
]);
156 }else if(strcmp("ltt_major_version", attribute_names
[i
])==0){
157 des
->ltt_major_version
= atoi(attribute_values
[i
]);
158 }else if(strcmp("ltt_minor_version", attribute_names
[i
])==0){
159 des
->ltt_minor_version
= atoi(attribute_values
[i
]);
160 }else if(strcmp("ltt_block_size", attribute_names
[i
])==0){
161 des
->ltt_block_size
= atoi(attribute_values
[i
]);
163 *error
= g_error_new(G_MARKUP_ERROR
,
165 "Not a valid attribute");
172 static void parser_characters (GMarkupParseContext __UNUSED__
*context
,
174 gsize __UNUSED__ text_len
,
176 GError __UNUSED__
**error
)
178 LttSystemDescription
* des
= (LttSystemDescription
* )user_data
;
179 des
->description
= g_strdup(text
);
182 LttFacility
*ltt_trace_get_facility_by_num(LttTrace
*t
,
185 g_assert(num
< t
->facilities_by_num
->len
);
187 return &g_array_index(t
->facilities_by_num
, LttFacility
, num
);
191 guint
ltt_trace_get_num_cpu(LttTrace
*t
)
199 * Return value : 0 success, 1 bad tracefile
201 int parse_trace_header(void *header
, LttTracefile
*tf
, LttTrace
*t
)
203 guint32
*magic_number
= (guint32
*)header
;
204 struct ltt_trace_header_any
*any
= (struct ltt_trace_header_any
*)header
;
206 if(*magic_number
== LTT_MAGIC_NUMBER
)
208 else if(*magic_number
== LTT_REV_MAGIC_NUMBER
)
210 else /* invalid magic number, bad tracefile ! */
213 /* Get float byte order : might be different from int byte order
214 * (or is set to 0 if the trace has no float (kernel trace)) */
215 tf
->float_word_order
= any
->float_word_order
;
218 t
->arch_type
= ltt_get_uint32(LTT_GET_BO(tf
),
220 t
->arch_variant
= ltt_get_uint32(LTT_GET_BO(tf
),
222 t
->arch_size
= any
->arch_size
;
223 t
->ltt_major_version
= any
->major_version
;
224 t
->ltt_minor_version
= any
->minor_version
;
225 t
->flight_recorder
= any
->flight_recorder
;
226 t
->has_heartbeat
= any
->has_heartbeat
;
227 t
->has_alignment
= any
->has_alignment
;
228 t
->has_tsc
= any
->has_tsc
;
232 switch(any
->major_version
) {
235 switch(any
->minor_version
) {
238 tf
->buffer_header_size
=
239 sizeof(struct ltt_block_start_header
)
240 + sizeof(struct ltt_trace_header_0_3
);
241 g_warning("Unsupported trace version : %hhu.%hhu",
242 any
->major_version
, any
->minor_version
);
248 struct ltt_trace_header_0_4
*vheader
=
249 (struct ltt_trace_header_0_4
*)header
;
250 tf
->buffer_header_size
=
251 sizeof(struct ltt_block_start_header
)
252 + sizeof(struct ltt_trace_header_0_4
);
254 t
->start_freq
= ltt_get_uint64(LTT_GET_BO(tf
),
255 &vheader
->start_freq
);
256 t
->start_tsc
= ltt_get_uint64(LTT_GET_BO(tf
),
257 &vheader
->start_tsc
);
258 t
->start_monotonic
= ltt_get_uint64(LTT_GET_BO(tf
),
259 &vheader
->start_monotonic
);
260 t
->start_time
= ltt_get_time(LTT_GET_BO(tf
),
261 &vheader
->start_time
);
262 t
->start_time_from_tsc
= ltt_time_from_uint64(
263 (double)t
->start_tsc
* 1000000.0 / (double)t
->start_freq
);
268 g_warning("Unsupported trace version : %hhu.%hhu",
269 any
->major_version
, any
->minor_version
);
275 g_warning("Unsupported trace version : %hhu.%hhu",
276 any
->major_version
, any
->minor_version
);
286 /*****************************************************************************
288 * ltt_tracefile_open : open a trace file, construct a LttTracefile
290 * t : the trace containing the tracefile
291 * fileName : path name of the trace file
292 * tf : the tracefile structure
294 * : 0 for success, -1 otherwise.
295 ****************************************************************************/
297 gint
ltt_tracefile_open(LttTrace
*t
, gchar
* fileName
, LttTracefile
*tf
)
299 struct stat lTDFStat
; /* Trace data file status */
300 struct ltt_block_start_header
*header
;
301 int page_size
= getpagesize();
304 tf
->long_name
= g_quark_from_string(fileName
);
306 tf
->fd
= open(fileName
, O_RDONLY
);
308 g_warning("Unable to open input data file %s\n", fileName
);
312 // Get the file's status
313 if(fstat(tf
->fd
, &lTDFStat
) < 0){
314 g_warning("Unable to get the status of the input data file %s\n", fileName
);
318 // Is the file large enough to contain a trace
319 if(lTDFStat
.st_size
<
320 (off_t
)(sizeof(struct ltt_block_start_header
)
321 + sizeof(struct ltt_trace_header_any
))){
322 g_print("The input data file %s does not contain a trace\n", fileName
);
326 /* Temporarily map the buffer start header to get trace information */
327 /* Multiple of pages aligned head */
328 tf
->buffer
.head
= mmap(0,
329 PAGE_ALIGN(sizeof(struct ltt_block_start_header
)
330 + sizeof(struct ltt_trace_header_any
)), PROT_READ
,
331 MAP_PRIVATE
, tf
->fd
, 0);
332 if(tf
->buffer
.head
== MAP_FAILED
) {
333 perror("Error in allocating memory for buffer of tracefile");
336 g_assert( ( (guint
)tf
->buffer
.head
&(8-1) ) == 0); // make sure it's aligned.
338 header
= (struct ltt_block_start_header
*)tf
->buffer
.head
;
340 if(parse_trace_header(header
->trace
, tf
, NULL
)) {
341 g_warning("parse_trace_header error");
345 //store the size of the file
346 tf
->file_size
= lTDFStat
.st_size
;
347 tf
->buf_size
= ltt_get_uint32(LTT_GET_BO(tf
), &header
->buf_size
);
348 tf
->num_blocks
= tf
->file_size
/ tf
->buf_size
;
350 if(munmap(tf
->buffer
.head
,
351 PAGE_ALIGN(sizeof(struct ltt_block_start_header
)
352 + sizeof(struct ltt_trace_header_any
)))) {
353 g_warning("unmap size : %u\n",
354 PAGE_ALIGN(sizeof(struct ltt_block_start_header
)
355 + sizeof(struct ltt_trace_header_any
)));
356 perror("munmap error");
359 tf
->buffer
.head
= NULL
;
361 //read the first block
362 if(map_block(tf
,0)) {
363 perror("Cannot map block for tracefile");
371 if(munmap(tf
->buffer
.head
,
372 PAGE_ALIGN(sizeof(struct ltt_block_start_header
)
373 + sizeof(struct ltt_trace_header_any
)))) {
374 g_warning("unmap size : %u\n",
375 PAGE_ALIGN(sizeof(struct ltt_block_start_header
)
376 + sizeof(struct ltt_trace_header_any
)));
377 perror("munmap error");
386 LttTrace
*ltt_tracefile_get_trace(LttTracefile
*tf
)
392 /*****************************************************************************
393 *Open control and per cpu tracefiles
394 ****************************************************************************/
396 void ltt_tracefile_open_cpu(LttTrace
*t
, gchar
* tracefile_name
)
399 tf
= ltt_tracefile_open(t
,tracefile_name
);
401 t
->per_cpu_tracefile_number
++;
402 g_ptr_array_add(t
->per_cpu_tracefiles
, tf
);
405 gint
ltt_tracefile_open_control(LttTrace
*t
, gchar
* control_name
)
414 tf
= ltt_tracefile_open(t
,control_name
);
416 g_warning("ltt_tracefile_open_control : bad file descriptor");
419 t
->control_tracefile_number
++;
420 g_ptr_array_add(t
->control_tracefiles
,tf
);
422 //parse facilities tracefile to get base_id
423 if(strcmp(&control_name
[strlen(control_name
)-10],"facilities") ==0){
425 if(!ltt_tracefile_read(tf
,&ev
)) return 0; // end of file
427 if(ev
.event_id
== TRACE_FACILITY_LOAD
){
429 fLoad
.name
= (gchar
*)pos
;
430 fLoad
.checksum
= *(LttChecksum
*)(pos
+ strlen(fLoad
.name
));
431 fLoad
.base_code
= *(guint32
*)(pos
+ strlen(fLoad
.name
) + sizeof(LttChecksum
));
433 for(i
=0;i
<t
->facility_number
;i
++){
434 f
= (LttFacility
*)g_ptr_array_index(t
->facilities
,i
);
435 if(strcmp(f
->name
,fLoad
.name
)==0 && fLoad
.checksum
==f
->checksum
){
436 f
->base_id
= fLoad
.base_code
;
440 if(i
==t
->facility_number
) {
441 g_warning("Facility: %s, checksum: %u is not found",
442 fLoad
.name
,(unsigned int)fLoad
.checksum
);
445 }else if(ev
.event_id
== TRACE_BLOCK_START
){
447 }else if(ev
.event_id
== TRACE_BLOCK_END
){
450 g_warning("Not valid facilities trace file");
459 /*****************************************************************************
461 * ltt_tracefile_close: close a trace file,
463 * t : tracefile which will be closed
464 ****************************************************************************/
466 void ltt_tracefile_close(LttTracefile
*t
)
468 int page_size
= getpagesize();
470 if(t
->buffer
.head
!= NULL
)
471 if(munmap(t
->buffer
.head
, PAGE_ALIGN(t
->buf_size
))) {
472 g_warning("unmap size : %u\n",
473 PAGE_ALIGN(t
->buf_size
));
474 perror("munmap error");
482 /*****************************************************************************
483 *Get system information
484 ****************************************************************************/
486 gint
getSystemInfo(LttSystemDescription
* des
, gchar
* pathname
)
493 GMarkupParseContext
* context
;
494 GError
* error
= NULL
;
495 GMarkupParser markup_parser
=
497 parser_start_element
,
500 NULL
, /* passthrough */
504 fd
= g_open(pathname
, O_RDONLY
, 0);
506 g_warning("Can not open file : %s\n", pathname
);
510 iochan
= g_io_channel_unix_new(fd
);
512 context
= g_markup_parse_context_new(&markup_parser
, 0, des
,NULL
);
514 //while(fgets(buf,DIR_NAME_SIZE, fp) != NULL){
515 while(g_io_channel_read_line(iochan
, &buf
, &length
, NULL
, &error
)
516 != G_IO_STATUS_EOF
) {
519 g_warning("Can not read xml file: \n%s\n", error
->message
);
522 if(!g_markup_parse_context_parse(context
, buf
, length
, &error
)){
524 g_warning("Can not parse xml file: \n%s\n", error
->message
);
527 g_markup_parse_context_free(context
);
529 g_io_channel_shutdown(iochan
, FALSE
, &error
); /* No flush */
531 g_warning("Can not close file: \n%s\n", error
->message
);
539 g_markup_parse_context_free(context
);
541 g_io_channel_shutdown(iochan
, FALSE
, &error
); /* No flush */
543 g_warning("Can not close file: \n%s\n", error
->message
);
554 /*****************************************************************************
555 *The following functions get facility/tracefile information
556 ****************************************************************************/
558 gint
getFacilityInfo(LttTrace
*t
, gchar
* eventdefs
)
565 gchar fullname
[DIR_NAME_SIZE
];
566 GError
* error
= NULL
;
568 dir
= g_dir_open(eventdefs
, 0, &error
);
571 g_warning("Can not open directory: %s, %s\n", eventdefs
, error
->message
);
576 while((name
= g_dir_read_name(dir
)) != NULL
){
577 if(!g_pattern_match_simple("*.xml", name
)) continue;
578 strcpy(fullname
,eventdefs
);
579 strcat(fullname
,name
);
580 ltt_facility_open(t
,fullname
);
584 for(j
=0;j
<t
->facility_number
;j
++){
585 f
= (LttFacility
*)g_ptr_array_index(t
->facilities
, j
);
586 for(i
=0; i
<f
->event_number
; i
++){
588 setFieldsOffset(NULL
, et
, NULL
, t
);
595 /*****************************************************************************
596 *A trace is specified as a pathname to the directory containing all the
597 *associated data (control tracefiles, per cpu tracefiles, event
600 *When a trace is closed, all the associated facilities, types and fields
601 *are released as well.
605 /****************************************************************************
606 * get_absolute_pathname
608 * return the unique pathname in the system
610 * MD : Fixed this function so it uses realpath, dealing well with
611 * forgotten cases (.. were not used correctly before).
613 ****************************************************************************/
614 void get_absolute_pathname(const gchar
*pathname
, gchar
* abs_pathname
)
616 abs_pathname
[0] = '\0';
618 if ( realpath (pathname
, abs_pathname
) != NULL
)
622 /* error, return the original path unmodified */
623 strcpy(abs_pathname
, pathname
);
629 /* Search for something like : .*_.*
631 * The left side is the name, the right side is the number.
634 int get_tracefile_name_number(const gchar
*raw_name
,
638 guint raw_name_len
= strlen(raw_name
);
639 gchar char_name
[PATH_MAX
];
645 for(i
=raw_name_len
-1;i
>=0;i
--) {
646 if(raw_name
[i
] == '_') break;
648 if(i
==0) /* Either not found or name length is 0 */
652 cpu_num
= strtol(raw_name
+underscore_pos
+1, &endptr
, 10);
654 if(endptr
== raw_name
+underscore_pos
+1)
655 return -1; /* No digit */
656 if(cpu_num
== LONG_MIN
|| cpu_num
== LONG_MAX
)
657 return -1; /* underflow / overflow */
659 strncpy(char_name
, raw_name
, underscore_pos
);
661 char_name
[underscore_pos
] = '\0';
663 *name
= g_quark_from_string(char_name
);
670 GData
**ltt_trace_get_tracefiles_groups(LttTrace
*trace
)
672 return &trace
->tracefiles
;
676 void compute_tracefile_group(GQuark key_id
,
678 struct compute_tracefile_group_args
*args
)
683 for(i
=0; i
<group
->len
; i
++) {
684 tf
= &g_array_index (group
, LttTracefile
, i
);
686 args
->func(tf
, args
->func_args
);
691 void ltt_tracefile_group_destroy(gpointer data
)
693 GArray
*group
= (GArray
*)data
;
697 for(i
=0; i
<group
->len
; i
++) {
698 tf
= &g_array_index (group
, LttTracefile
, i
);
700 ltt_tracefile_close(tf
);
702 g_array_free(group
, TRUE
);
705 gboolean
ltt_tracefile_group_has_cpu_online(gpointer data
)
707 GArray
*group
= (GArray
*)data
;
711 for(i
=0; i
<group
->len
; i
++) {
712 tf
= &g_array_index (group
, LttTracefile
, i
);
713 if(tf
->cpu_online
) return 1;
719 /* Open each tracefile under a specific directory. Put them in a
720 * GData : permits to access them using their tracefile group pathname.
721 * i.e. access control/modules tracefile group by index :
724 * relative path is the path relative to the trace root
725 * root path is the full path
727 * A tracefile group is simply an array where all the per cpu tracefiles sits.
730 static int open_tracefiles(LttTrace
*trace
, gchar
*root_path
,
731 gchar
*relative_path
)
733 DIR *dir
= opendir(root_path
);
734 struct dirent
*entry
;
735 struct stat stat_buf
;
738 gchar path
[PATH_MAX
];
743 gchar rel_path
[PATH_MAX
];
752 strncpy(path
, root_path
, PATH_MAX
-1);
753 path_len
= strlen(path
);
754 path
[path_len
] = '/';
756 path_ptr
= path
+ path_len
;
758 strncpy(rel_path
, relative_path
, PATH_MAX
-1);
759 rel_path_len
= strlen(rel_path
);
760 rel_path
[rel_path_len
] = '/';
762 rel_path_ptr
= rel_path
+ rel_path_len
;
764 while((entry
= readdir(dir
)) != NULL
) {
766 if(entry
->d_name
[0] == '.') continue;
768 strncpy(path_ptr
, entry
->d_name
, PATH_MAX
- path_len
);
769 strncpy(rel_path_ptr
, entry
->d_name
, PATH_MAX
- rel_path_len
);
771 ret
= stat(path
, &stat_buf
);
777 g_debug("Tracefile file or directory : %s\n", path
);
779 if(strcmp(rel_path
, "/eventdefs") == 0) continue;
781 if(S_ISDIR(stat_buf
.st_mode
)) {
783 g_debug("Entering subdirectory...\n");
784 ret
= open_tracefiles(trace
, path
, rel_path
);
785 if(ret
< 0) continue;
786 } else if(S_ISREG(stat_buf
.st_mode
)) {
791 if(get_tracefile_name_number(rel_path
, &name
, &num
))
792 continue; /* invalid name */
794 g_debug("Opening file.\n");
795 if(ltt_tracefile_open(trace
, path
, &tmp_tf
)) {
796 g_info("Error opening tracefile %s", path
);
798 continue; /* error opening the tracefile : bad magic number ? */
801 g_debug("Tracefile name is %s and number is %u",
802 g_quark_to_string(name
), num
);
804 tmp_tf
.cpu_online
= 1;
805 tmp_tf
.cpu_num
= num
;
808 group
= g_datalist_id_get_data(&trace
->tracefiles
, name
);
810 /* Elements are automatically cleared when the array is allocated.
811 * It makes the cpu_online variable set to 0 : cpu offline, by default.
813 group
= g_array_sized_new (FALSE
, TRUE
, sizeof(LttTracefile
), 10);
814 g_datalist_id_set_data_full(&trace
->tracefiles
, name
,
815 group
, ltt_tracefile_group_destroy
);
818 /* Add the per cpu tracefile to the named group */
819 unsigned int old_len
= group
->len
;
821 group
= g_array_set_size(group
, num
+1);
822 g_array_index (group
, LttTracefile
, num
) = tmp_tf
;
832 /* ltt_get_facility_description
834 * Opens the file corresponding to the requested facility (identified by fac_id
837 * The name searched is : %trace root%/eventdefs/facname_checksum.xml
839 * Returns 0 on success, or 1 on failure.
842 static int ltt_get_facility_description(LttFacility
*f
,
844 LttTracefile
*fac_tf
)
846 char desc_file_name
[PATH_MAX
];
851 text
= g_quark_to_string(t
->pathname
);
852 textlen
= strlen(text
);
854 if(textlen
>= PATH_MAX
) goto name_error
;
855 strcpy(desc_file_name
, text
);
857 text
= "/eventdefs/";
858 textlen
+=strlen(text
);
859 if(textlen
>= PATH_MAX
) goto name_error
;
860 strcat(desc_file_name
, text
);
862 text
= g_quark_to_string(f
->name
);
863 textlen
+=strlen(text
);
864 if(textlen
>= PATH_MAX
) goto name_error
;
865 strcat(desc_file_name
, text
);
868 textlen
+=strlen(text
);
869 if(textlen
>= PATH_MAX
) goto name_error
;
870 strcat(desc_file_name
, text
);
872 err
= snprintf(desc_file_name
+textlen
, PATH_MAX
-textlen
-1,
874 if(err
< 0) goto name_error
;
876 textlen
=strlen(desc_file_name
);
880 textlen
+=strlen(text
);
881 if(textlen
>= PATH_MAX
) goto name_error
;
882 strcat(desc_file_name
, text
);
884 err
= ltt_facility_open(f
, t
, desc_file_name
);
885 if(err
) goto facility_error
;
894 static void ltt_fac_ids_destroy(gpointer data
)
896 GArray
*fac_ids
= (GArray
*)data
;
898 g_array_free(fac_ids
, TRUE
);
902 /* Presumes the tracefile is already seeked at the beginning. It makes sense,
903 * because it must be done just after the opening */
904 static int ltt_process_facility_tracefile(LttTracefile
*tf
)
913 err
= ltt_tracefile_read_seek(tf
);
914 if(err
== EPERM
) goto seek_error
;
915 else if(err
== ERANGE
) break; /* End of tracefile */
917 err
= ltt_tracefile_read_update_event(tf
);
918 if(err
) goto update_error
;
920 /* We are on a facility load/or facility unload/ or heartbeat event */
922 * * facility 0 is hardcoded : this is the core facility. It will be shown
923 * in the facility array though, and is shown as "loaded builtin" in the
925 * It contains event :
927 * 1 : facility unload
928 * 2 : state dump facility load
931 if(tf
->event
.facility_id
!= LTT_FACILITY_CORE
) {
932 /* Should only contain core facility */
933 g_warning("Error in processing facility file %s, "
934 "should not contain facility id %u.", g_quark_to_string(tf
->name
),
935 tf
->event
.facility_id
);
940 struct LttFacilityLoad
*fac_load_data
;
941 struct LttStateDumpFacilityLoad
*fac_state_dump_load_data
;
945 switch((enum ltt_core_events
)tf
->event
.event_id
) {
946 case LTT_EVENT_FACILITY_LOAD
:
947 fac_name
= (char*)(tf
->event
.data
);
948 g_debug("Doing LTT_EVENT_FACILITY_LOAD of facility %s",
951 (struct LttFacilityLoad
*)
952 (tf
->event
.data
+ strlen(fac_name
) + 1);
953 fac
= &g_array_index (tf
->trace
->facilities_by_num
, LttFacility
,
954 ltt_get_uint32(LTT_GET_BO(tf
), &fac_load_data
->id
));
955 g_assert(fac
->exists
== 0);
956 fac
->name
= g_quark_from_string(fac_name
);
957 fac
->checksum
= ltt_get_uint32(LTT_GET_BO(tf
),
958 &fac_load_data
->checksum
);
959 fac
->id
= ltt_get_uint32(LTT_GET_BO(tf
), &fac_load_data
->id
);
960 fac
->pointer_size
= ltt_get_uint32(LTT_GET_BO(tf
),
961 &fac_load_data
->pointer_size
);
962 fac
->long_size
= ltt_get_uint32(LTT_GET_BO(tf
),
963 &fac_load_data
->long_size
);
964 fac
->size_t_size
= ltt_get_uint32(LTT_GET_BO(tf
),
965 &fac_load_data
->size_t_size
);
966 fac
->alignment
= ltt_get_uint32(LTT_GET_BO(tf
),
967 &fac_load_data
->alignment
);
969 if(ltt_get_facility_description(fac
, tf
->trace
, tf
))
970 continue; /* error opening description */
972 fac
->trace
= tf
->trace
;
974 /* Preset the field offsets */
975 for(i
=0; i
<fac
->events
->len
; i
++){
976 et
= &g_array_index(fac
->events
, LttEventType
, i
);
977 set_fields_offsets(tf
, et
);
982 fac_ids
= g_datalist_id_get_data(&tf
->trace
->facilities_by_name
,
984 if(fac_ids
== NULL
) {
985 fac_ids
= g_array_sized_new (FALSE
, TRUE
, sizeof(guint
), 1);
986 g_datalist_id_set_data_full(&tf
->trace
->facilities_by_name
,
988 fac_ids
, ltt_fac_ids_destroy
);
990 g_array_append_val(fac_ids
, fac
->id
);
993 case LTT_EVENT_FACILITY_UNLOAD
:
994 g_debug("Doing LTT_EVENT_FACILITY_UNLOAD");
995 /* We don't care about unload : facilities ID are valid for the whole
996 * trace. They simply won't be used after the unload. */
998 case LTT_EVENT_STATE_DUMP_FACILITY_LOAD
:
999 fac_name
= (char*)(tf
->event
.data
);
1000 g_debug("Doing LTT_EVENT_STATE_DUMP_FACILITY_LOAD of facility %s",
1002 fac_state_dump_load_data
=
1003 (struct LttStateDumpFacilityLoad
*)
1004 (tf
->event
.data
+ strlen(fac_name
) + 1);
1005 fac
= &g_array_index (tf
->trace
->facilities_by_num
, LttFacility
,
1006 ltt_get_uint32(LTT_GET_BO(tf
), &fac_state_dump_load_data
->id
));
1007 g_assert(fac
->exists
== 0);
1008 fac
->name
= g_quark_from_string(fac_name
);
1009 fac
->checksum
= ltt_get_uint32(LTT_GET_BO(tf
),
1010 &fac_state_dump_load_data
->checksum
);
1011 fac
->id
= fac_state_dump_load_data
->id
;
1012 fac
->pointer_size
= ltt_get_uint32(LTT_GET_BO(tf
),
1013 &fac_state_dump_load_data
->pointer_size
);
1014 fac
->long_size
= ltt_get_uint32(LTT_GET_BO(tf
),
1015 &fac_state_dump_load_data
->long_size
);
1016 fac
->size_t_size
= ltt_get_uint32(LTT_GET_BO(tf
),
1017 &fac_state_dump_load_data
->size_t_size
);
1018 fac
->alignment
= ltt_get_uint32(LTT_GET_BO(tf
),
1019 &fac_state_dump_load_data
->alignment
);
1020 if(ltt_get_facility_description(fac
, tf
->trace
, tf
))
1021 continue; /* error opening description */
1023 fac
->trace
= tf
->trace
;
1025 /* Preset the field offsets */
1026 for(i
=0; i
<fac
->events
->len
; i
++){
1027 et
= &g_array_index(fac
->events
, LttEventType
, i
);
1028 set_fields_offsets(tf
, et
);
1033 fac_ids
= g_datalist_id_get_data(&tf
->trace
->facilities_by_name
,
1035 if(fac_ids
== NULL
) {
1036 fac_ids
= g_array_sized_new (FALSE
, TRUE
, sizeof(guint
), 1);
1037 g_datalist_id_set_data_full(&tf
->trace
->facilities_by_name
,
1039 fac_ids
, ltt_fac_ids_destroy
);
1041 g_array_append_val(fac_ids
, fac
->id
);
1044 case LTT_EVENT_HEARTBEAT
:
1047 g_warning("Error in processing facility file %s, "
1048 "unknown event id %hhu in core facility.",
1049 g_quark_to_string(tf
->name
),
1050 tf
->event
.event_id
);
1052 goto event_id_error
;
1058 /* Error handling */
1063 g_warning("An error occured in facility tracefile parsing");
1068 LttTrace
*ltt_trace_open(const gchar
*pathname
)
1070 gchar abs_path
[PATH_MAX
];
1075 struct ltt_block_start_header
*header
;
1077 struct dirent
*entry
;
1078 guint control_found
= 0;
1079 guint eventdefs_found
= 0;
1080 struct stat stat_buf
;
1081 gchar path
[PATH_MAX
];
1083 t
= g_new(LttTrace
, 1);
1084 if(!t
) goto alloc_error
;
1086 get_absolute_pathname(pathname
, abs_path
);
1087 t
->pathname
= g_quark_from_string(abs_path
);
1089 g_datalist_init(&t
->tracefiles
);
1091 /* Test to see if it looks like a trace */
1092 dir
= opendir(abs_path
);
1097 while((entry
= readdir(dir
)) != NULL
) {
1098 strcpy(path
, abs_path
);
1100 strcat(path
, entry
->d_name
);
1101 ret
= stat(path
, &stat_buf
);
1106 if(S_ISDIR(stat_buf
.st_mode
)) {
1107 if(strcmp(entry
->d_name
, "control") == 0) {
1110 if(strcmp(entry
->d_name
, "eventdefs") == 0) {
1111 eventdefs_found
= 1;
1117 if(!control_found
|| !eventdefs_found
) goto find_error
;
1119 /* Open all the tracefiles */
1120 if(open_tracefiles(t
, abs_path
, "")) {
1121 g_warning("Error opening tracefile %s", abs_path
);
1125 /* Prepare the facilities containers : array and mapping */
1126 /* Array is zeroed : the "exists" field is set to false by default */
1127 t
->facilities_by_num
= g_array_sized_new (FALSE
,
1128 TRUE
, sizeof(LttFacility
),
1130 t
->facilities_by_num
= g_array_set_size(t
->facilities_by_num
, NUM_FACILITIES
);
1132 g_datalist_init(&t
->facilities_by_name
);
1134 /* Parse each trace control/facilitiesN files : get runtime fac. info */
1135 group
= g_datalist_id_get_data(&t
->tracefiles
, LTT_TRACEFILE_NAME_FACILITIES
);
1137 g_error("Trace %s has no facility tracefile", abs_path
);
1139 goto facilities_error
;
1142 /* Get the trace information for the control/facility 0 tracefile */
1143 g_assert(group
->len
> 0);
1144 tf
= &g_array_index (group
, LttTracefile
, 0);
1145 header
= (struct ltt_block_start_header
*)tf
->buffer
.head
;
1146 g_assert(parse_trace_header(header
->trace
,
1149 t
->num_cpu
= group
->len
;
1151 for(i
=0; i
<group
->len
; i
++) {
1152 tf
= &g_array_index (group
, LttTracefile
, i
);
1153 if(ltt_process_facility_tracefile(tf
))
1154 goto facilities_error
;
1159 /* Error handling */
1161 g_datalist_clear(&t
->facilities_by_name
);
1162 g_array_free(t
->facilities_by_num
, TRUE
);
1164 g_datalist_clear(&t
->tracefiles
);
1172 GQuark
ltt_trace_name(const LttTrace
*t
)
1178 /******************************************************************************
1179 * When we copy a trace, we want all the opening actions to happen again :
1180 * the trace will be reopened and totally independant from the original.
1181 * That's why we call ltt_trace_open.
1182 *****************************************************************************/
1183 LttTrace
*ltt_trace_copy(LttTrace
*self
)
1185 return ltt_trace_open(g_quark_to_string(self
->pathname
));
1188 void ltt_trace_close(LttTrace
*t
)
1193 for(i
=0; i
<t
->facilities_by_num
->len
; i
++) {
1194 fac
= &g_array_index (t
->facilities_by_num
, LttFacility
, i
);
1196 ltt_facility_close(fac
);
1199 g_datalist_clear(&t
->facilities_by_name
);
1200 g_array_free(t
->facilities_by_num
, TRUE
);
1201 g_datalist_clear(&t
->tracefiles
);
1206 /*****************************************************************************
1207 *Get the system description of the trace
1208 ****************************************************************************/
1210 LttFacility
*ltt_trace_facility_by_id(LttTrace
*t
, guint8 id
)
1212 g_assert(id
< t
->facilities_by_num
->len
);
1213 return &g_array_index(t
->facilities_by_num
, LttFacility
, id
);
1216 /* ltt_trace_facility_get_by_name
1218 * Returns the GArray of facility indexes. All the fac_ids that matches the
1219 * requested facility name.
1221 * If name is not found, returns NULL.
1223 GArray
*ltt_trace_facility_get_by_name(LttTrace
*t
, GQuark name
)
1225 return g_datalist_id_get_data(&t
->facilities_by_name
, name
);
1228 /*****************************************************************************
1229 * Functions to discover all the event types in the trace
1230 ****************************************************************************/
1233 unsigned ltt_trace_eventtype_number(LttTrace
*t
)
1237 unsigned int num
= t
->facility_number
;
1241 f
= (LttFacility
*)g_ptr_array_index(t
->facilities
, i
);
1242 count
+= f
->event_number
;
1249 //use an iteration on all the trace facilities, and inside iteration on all the
1250 //event types in each facilities instead.
1251 LttEventType
*ltt_trace_eventtype_get(LttTrace
*t
, unsigned evId
)
1253 LttEventType
*event_type
;
1256 f
= ltt_trace_facility_by_id(t
,evId
);
1258 if(unlikely(!f
)) event_type
= NULL
;
1259 else event_type
= f
->events
[evId
- f
->base_id
];
1266 /*****************************************************************************
1267 * ltt_trace_find_tracefile
1269 * Find a tracefile by name and index in the group.
1271 * Returns a pointer to the tracefiles, else NULL.
1272 ****************************************************************************/
1274 LttTracefile
*ltt_trace_find_tracefile(LttTrace
*t
, const gchar
*name
)
1279 /*****************************************************************************
1280 * Get the start time and end time of the trace
1281 ****************************************************************************/
1283 static void ltt_tracefile_time_span_get(LttTracefile
*tf
,
1284 LttTime
*start
, LttTime
*end
)
1288 err
= map_block(tf
, 0);
1290 g_error("Can not map block");
1291 *start
= ltt_time_infinite
;
1293 *start
= tf
->buffer
.begin
.timestamp
;
1295 err
= map_block(tf
, tf
->num_blocks
- 1); /* Last block */
1297 g_error("Can not map block");
1298 *end
= ltt_time_zero
;
1300 *end
= tf
->buffer
.end
.timestamp
;
1303 struct tracefile_time_span_get_args
{
1309 static void group_time_span_get(GQuark name
, gpointer data
, gpointer user_data
)
1311 struct tracefile_time_span_get_args
*args
=
1312 (struct tracefile_time_span_get_args
*)user_data
;
1314 GArray
*group
= (GArray
*)data
;
1320 for(i
=0; i
<group
->len
; i
++) {
1321 tf
= &g_array_index (group
, LttTracefile
, i
);
1322 if(tf
->cpu_online
) {
1323 ltt_tracefile_time_span_get(tf
, &tmp_start
, &tmp_end
);
1324 if(ltt_time_compare(*args
->start
, tmp_start
)>0) *args
->start
= tmp_start
;
1325 if(ltt_time_compare(*args
->end
, tmp_end
)<0) *args
->end
= tmp_end
;
1330 void ltt_trace_time_span_get(LttTrace
*t
, LttTime
*start
, LttTime
*end
)
1332 LttTime min_start
= ltt_time_infinite
;
1333 LttTime max_end
= ltt_time_zero
;
1334 struct tracefile_time_span_get_args args
= { t
, &min_start
, &max_end
};
1336 g_datalist_foreach(&t
->tracefiles
, &group_time_span_get
, &args
);
1338 if(start
!= NULL
) *start
= min_start
;
1339 if(end
!= NULL
) *end
= max_end
;
1344 /*****************************************************************************
1345 *Get the name of a tracefile
1346 ****************************************************************************/
1348 GQuark
ltt_tracefile_name(const LttTracefile
*tf
)
1353 GQuark
ltt_tracefile_long_name(const LttTracefile
*tf
)
1355 return tf
->long_name
;
1360 guint
ltt_tracefile_num(LttTracefile
*tf
)
1365 /*****************************************************************************
1366 * Get the number of blocks in the tracefile
1367 ****************************************************************************/
1369 guint
ltt_tracefile_block_number(LttTracefile
*tf
)
1371 return tf
->num_blocks
;
1375 /* Seek to the first event in a tracefile that has a time equal or greater than
1376 * the time passed in parameter.
1378 * If the time parameter is outside the tracefile time span, seek to the first
1379 * event or if after, return ERANGE.
1381 * If the time parameter is before the first event, we have to seek specially to
1384 * If the time is after the end of the trace, return ERANGE.
1386 * Do a binary search to find the right block, then a sequential search in the
1387 * block to find the event.
1389 * In the special case where the time requested fits inside a block that has no
1390 * event corresponding to the requested time, the first event of the next block
1393 * IMPORTANT NOTE : // FIXME everywhere...
1395 * You MUST NOT do a ltt_tracefile_read right after a ltt_tracefile_seek_time :
1396 * you will jump over an event if you do.
1398 * Return value : 0 : no error, the tf->event can be used
1399 * ERANGE : time if after the last event of the trace
1400 * otherwise : this is an error.
1404 int ltt_tracefile_seek_time(LttTracefile
*tf
, LttTime time
)
1408 unsigned int block_num
, high
, low
;
1410 /* seek at the beginning of trace */
1411 err
= map_block(tf
, 0); /* First block */
1413 g_error("Can not map block");
1417 /* If the time is lower or equal the beginning of the trace,
1418 * go to the first event. */
1419 if(ltt_time_compare(time
, tf
->buffer
.begin
.timestamp
) <= 0) {
1420 ret
= ltt_tracefile_read(tf
);
1421 if(ret
== ERANGE
) goto range
;
1422 else if (ret
) goto fail
;
1423 goto found
; /* There is either no event in the trace or the event points
1424 to the first event in the trace */
1427 err
= map_block(tf
, tf
->num_blocks
- 1); /* Last block */
1429 g_error("Can not map block");
1433 /* If the time is after the end of the trace, return ERANGE. */
1434 if(ltt_time_compare(time
, tf
->buffer
.end
.timestamp
) > 0) {
1438 /* Binary search the block */
1439 high
= tf
->num_blocks
- 1;
1443 block_num
= ((high
-low
) / 2) + low
;
1445 err
= map_block(tf
, block_num
);
1447 g_error("Can not map block");
1451 /* We cannot divide anymore : this is what would happen if the time
1452 * requested was exactly between two consecutive buffers'end and start
1453 * timestamps. This is also what would happend if we didn't deal with out
1454 * of span cases prior in this function. */
1455 /* The event is right in the buffer!
1456 * (or in the next buffer first event) */
1458 ret
= ltt_tracefile_read(tf
);
1459 if(ret
== ERANGE
) goto range
; /* ERANGE or EPERM */
1460 else if(ret
) goto fail
;
1462 if(ltt_time_compare(time
, tf
->event
.event_time
) <= 0)
1466 } else if(ltt_time_compare(time
, tf
->buffer
.begin
.timestamp
) < 0) {
1467 /* go to lower part */
1468 high
= block_num
- 1;
1469 } else if(ltt_time_compare(time
, tf
->buffer
.end
.timestamp
) > 0) {
1470 /* go to higher part */
1471 low
= block_num
+ 1;
1472 } else {/* The event is right in the buffer!
1473 (or in the next buffer first event) */
1475 ret
= ltt_tracefile_read(tf
);
1476 if(ret
== ERANGE
) goto range
; /* ERANGE or EPERM */
1477 else if(ret
) goto fail
;
1479 if(ltt_time_compare(time
, tf
->event
.event_time
) <= 0)
1491 /* Error handling */
1493 g_error("ltt_tracefile_seek_time failed on tracefile %s",
1494 g_quark_to_string(tf
->name
));
1499 int ltt_tracefile_seek_position(LttTracefile
*tf
, const LttEventPosition
*ep
) {
1503 if(ep
->tracefile
!= tf
) {
1507 err
= map_block(tf
, ep
->block
);
1509 g_error("Can not map block");
1513 tf
->event
.offset
= ep
->offset
;
1515 err
= ltt_tracefile_read_update_event(tf
);
1517 err
= ltt_tracefile_read_op(tf
);
1523 g_error("ltt_tracefile_seek_time failed on tracefile %s",
1524 g_quark_to_string(tf
->name
));
1528 /* Calculate the real event time based on the buffer boundaries */
1529 LttTime
ltt_interpolate_time(LttTracefile
*tf
, LttEvent
*event
)
1533 g_assert(tf
->trace
->has_tsc
);
1535 // time = ltt_time_from_uint64(
1536 // cycles_2_ns(tf, (guint64)(tf->buffer.tsc - tf->buffer.begin.cycle_count)));
1537 time
= ltt_time_from_uint64(
1538 (double)(tf
->buffer
.tsc
- tf
->trace
->start_tsc
) * 1000000.0
1539 / (double)tf
->trace
->start_freq
);
1540 //time = ltt_time_add(tf->buffer.begin.timestamp, time);
1541 time
= ltt_time_add(tf
->trace
->start_time_from_tsc
, time
);
1547 /* Get the current event of the tracefile : valid until the next read */
1548 LttEvent
*ltt_tracefile_get_event(LttTracefile
*tf
)
1555 /*****************************************************************************
1557 * ltt_tracefile_read : Read the next event in the tracefile
1562 * Returns 0 if an event can be used in tf->event.
1563 * Returns ERANGE on end of trace. The event in tf->event still can be used
1564 * (if the last block was not empty).
1565 * Returns EPERM on error.
1567 * This function does make the tracefile event structure point to the event
1568 * currently pointed to by the tf->event.
1570 * Note : you must call a ltt_tracefile_seek to the beginning of the trace to
1571 * reinitialize it after an error if you want results to be coherent.
1572 * It would be the case if a end of trace last buffer has no event : the end
1573 * of trace wouldn't be returned, but an error.
1574 * We make the assumption there is at least one event per buffer.
1575 ****************************************************************************/
1577 int ltt_tracefile_read(LttTracefile
*tf
)
1581 err
= ltt_tracefile_read_seek(tf
);
1583 err
= ltt_tracefile_read_update_event(tf
);
1585 err
= ltt_tracefile_read_op(tf
);
1591 int ltt_tracefile_read_seek(LttTracefile
*tf
)
1595 /* Get next buffer until we finally have an event, or end of trace */
1597 err
= ltt_seek_next_event(tf
);
1598 if(unlikely(err
== ENOPROTOOPT
)) {
1602 /* Are we at the end of the buffer ? */
1604 if(unlikely(tf
->buffer
.index
== tf
->num_blocks
-1)){ /* end of trace ? */
1607 /* get next block */
1608 err
= map_block(tf
, tf
->buffer
.index
+ 1);
1610 g_error("Can not map block");
1614 } else break; /* We found an event ! */
1621 /* do specific operation on events */
1622 int ltt_tracefile_read_op(LttTracefile
*tf
)
1628 /* do event specific operation */
1630 /* do something if its an heartbeat event : increment the heartbeat count */
1631 //if(event->facility_id == LTT_FACILITY_CORE)
1632 // if(event->event_id == LTT_EVENT_HEARTBEAT)
1633 // tf->cur_heart_beat_number++;
1639 /* same as ltt_tracefile_read, but does not seek to the next event nor call
1640 * event specific operation. */
1641 int ltt_tracefile_read_update_event(LttTracefile
*tf
)
1647 pos
= tf
->buffer
.head
+ event
->offset
;
1649 /* Read event header */
1653 if(tf
->trace
->has_tsc
) {
1654 if(tf
->trace
->has_heartbeat
) {
1655 event
->time
.timestamp
= ltt_get_uint32(LTT_GET_BO(tf
),
1657 /* 32 bits -> 64 bits tsc */
1658 /* note : still works for seek and non seek cases. */
1659 if(event
->time
.timestamp
< (0xFFFFFFFFULL
&tf
->buffer
.tsc
)) {
1660 tf
->buffer
.tsc
= ((tf
->buffer
.tsc
&0xFFFFFFFF00000000ULL
)
1662 | (guint64
)event
->time
.timestamp
;
1663 event
->tsc
= tf
->buffer
.tsc
;
1666 tf
->buffer
.tsc
= (tf
->buffer
.tsc
&0xFFFFFFFF00000000ULL
)
1667 | (guint64
)event
->time
.timestamp
;
1668 event
->tsc
= tf
->buffer
.tsc
;
1670 pos
+= sizeof(guint32
);
1672 event
->tsc
= ltt_get_uint64(LTT_GET_BO(tf
), pos
);
1673 tf
->buffer
.tsc
= event
->tsc
;
1674 pos
+= sizeof(guint64
);
1677 event
->event_time
= ltt_interpolate_time(tf
, event
);
1679 event
->time
.delta
.tv_sec
= 0;
1680 event
->time
.delta
.tv_nsec
= ltt_get_uint32(LTT_GET_BO(tf
),
1681 pos
) * NSEC_PER_USEC
;
1683 event
->tsc
= tf
->buffer
.tsc
;
1685 event
->event_time
= ltt_time_add(tf
->buffer
.begin
.timestamp
,
1687 pos
+= sizeof(guint32
);
1690 event
->facility_id
= *(guint8
*)pos
;
1691 pos
+= sizeof(guint8
);
1693 event
->event_id
= *(guint8
*)pos
;
1694 pos
+= sizeof(guint8
);
1696 event
->event_size
= ltt_get_uint16(LTT_GET_BO(tf
), pos
);
1697 pos
+= sizeof(guint16
);
1701 /* get the data size and update the event fields with the current
1703 ltt_update_event_size(tf
);
1709 /****************************************************************************
1711 * map_block : map a block from the file
1713 * lttdes : ltt trace file
1714 * whichBlock : the block which will be read
1717 * EINVAL : lseek fail
1718 * EIO : can not read from the file
1719 ****************************************************************************/
1721 static gint
map_block(LttTracefile
* tf
, guint block_num
)
1723 int page_size
= getpagesize();
1724 struct ltt_block_start_header
*header
;
1726 g_assert(block_num
< tf
->num_blocks
);
1728 if(tf
->buffer
.head
!= NULL
) {
1729 if(munmap(tf
->buffer
.head
, PAGE_ALIGN(tf
->buf_size
))) {
1730 g_warning("unmap size : %u\n",
1731 PAGE_ALIGN(tf
->buf_size
));
1732 perror("munmap error");
1738 /* Multiple of pages aligned head */
1739 tf
->buffer
.head
= mmap(0,
1740 PAGE_ALIGN(tf
->buf_size
),
1741 PROT_READ
, MAP_PRIVATE
, tf
->fd
,
1742 PAGE_ALIGN((off_t
)tf
->buf_size
* (off_t
)block_num
));
1744 if(tf
->buffer
.head
== MAP_FAILED
) {
1745 perror("Error in allocating memory for buffer of tracefile");
1749 g_assert( ( (guint
)tf
->buffer
.head
&(8-1) ) == 0); // make sure it's aligned.
1752 tf
->buffer
.index
= block_num
;
1754 header
= (struct ltt_block_start_header
*)tf
->buffer
.head
;
1757 tf
->buffer
.begin
.timestamp
= ltt_time_add(
1758 ltt_time_from_uint64(
1759 ltt_get_uint64(LTT_GET_BO(tf
),
1760 &header
->begin
.timestamp
)
1761 - tf
->trace
->start_monotonic
),
1762 tf
->trace
->start_time
);
1764 //g_debug("block %u begin : %lu.%lu", block_num,
1765 // tf->buffer.begin.timestamp.tv_sec, tf->buffer.begin.timestamp.tv_nsec);
1766 tf
->buffer
.begin
.cycle_count
= ltt_get_uint64(LTT_GET_BO(tf
),
1767 &header
->begin
.cycle_count
);
1768 tf
->buffer
.begin
.freq
= ltt_get_uint64(LTT_GET_BO(tf
),
1769 &header
->begin
.freq
);
1770 tf
->buffer
.begin
.timestamp
= ltt_time_add(
1771 ltt_time_from_uint64(
1772 (double)(tf
->buffer
.begin
.cycle_count
1773 - tf
->trace
->start_tsc
) * 1000000.0
1774 / (double)tf
->trace
->start_freq
),
1775 tf
->trace
->start_time_from_tsc
);
1778 tf
->buffer
.end
.timestamp
= ltt_time_add(
1779 ltt_time_from_uint64(
1780 ltt_get_uint64(LTT_GET_BO(tf
),
1781 &header
->end
.timestamp
)
1782 - tf
->trace
->start_monotonic
),
1783 tf
->trace
->start_time
);
1785 //g_debug("block %u end : %lu.%lu", block_num,
1786 // tf->buffer.end.timestamp.tv_sec, tf->buffer.end.timestamp.tv_nsec);
1787 tf
->buffer
.end
.cycle_count
= ltt_get_uint64(LTT_GET_BO(tf
),
1788 &header
->end
.cycle_count
);
1789 tf
->buffer
.end
.freq
= ltt_get_uint64(LTT_GET_BO(tf
),
1791 tf
->buffer
.lost_size
= ltt_get_uint32(LTT_GET_BO(tf
),
1792 &header
->lost_size
);
1793 tf
->buffer
.end
.timestamp
= ltt_time_add(
1794 ltt_time_from_uint64(
1795 (double)(tf
->buffer
.end
.cycle_count
1796 - tf
->trace
->start_tsc
) * 1000000.0
1797 / (double)tf
->trace
->start_freq
),
1798 tf
->trace
->start_time_from_tsc
);
1800 tf
->buffer
.tsc
= tf
->buffer
.begin
.cycle_count
;
1801 tf
->event
.tsc
= tf
->buffer
.tsc
;
1802 tf
->buffer
.freq
= tf
->buffer
.begin
.freq
;
1805 * eventually support variable buffer size : will need a partial pre-read of
1806 * the headers to create an index when we open the trace... eventually. */
1807 g_assert(tf
->buf_size
== ltt_get_uint32(LTT_GET_BO(tf
),
1808 &header
->buf_size
));
1810 /* Now that the buffer is mapped, calculate the time interpolation for the
1813 // tf->buffer.nsecs_per_cycle = calc_nsecs_per_cycle(tf);
1814 //tf->buffer.cyc2ns_scale = calc_nsecs_per_cycle(tf);
1816 /* Make the current event point to the beginning of the buffer :
1817 * it means that the event read must get the first event. */
1818 tf
->event
.tracefile
= tf
;
1819 tf
->event
.block
= block_num
;
1820 tf
->event
.offset
= 0;
1829 /* It will update the fields offsets too */
1830 void ltt_update_event_size(LttTracefile
*tf
)
1834 /* Specific handling of core events : necessary to read the facility control
1836 LttFacility
*f
= ltt_trace_get_facility_by_num(tf
->trace
,
1837 tf
->event
.facility_id
);
1839 if(likely(tf
->event
.facility_id
== LTT_FACILITY_CORE
)) {
1840 switch((enum ltt_core_events
)tf
->event
.event_id
) {
1841 case LTT_EVENT_FACILITY_LOAD
:
1842 size
= strlen((char*)tf
->event
.data
) + 1;
1843 //g_debug("Update Event facility load of facility %s", (char*)tf->event.data);
1844 size
+= sizeof(struct LttFacilityLoad
);
1846 case LTT_EVENT_FACILITY_UNLOAD
:
1847 //g_debug("Update Event facility unload");
1848 size
= sizeof(struct LttFacilityUnload
);
1850 case LTT_EVENT_STATE_DUMP_FACILITY_LOAD
:
1851 size
= strlen((char*)tf
->event
.data
) + 1;
1852 //g_debug("Update Event facility load state dump of facility %s",
1853 // (char*)tf->event.data);
1854 size
+= sizeof(struct LttStateDumpFacilityLoad
);
1856 case LTT_EVENT_HEARTBEAT
:
1857 //g_debug("Update Event heartbeat");
1858 size
= sizeof(TimeHeartbeat
);
1861 g_warning("Error in getting event size : tracefile %s, "
1862 "unknown event id %hhu in core facility.",
1863 g_quark_to_string(tf
->name
),
1864 tf
->event
.event_id
);
1865 goto event_id_error
;
1870 g_error("Unknown facility %hhu (0x%hhx) in tracefile %s",
1871 tf
->event
.facility_id
,
1872 tf
->event
.facility_id
,
1873 g_quark_to_string(tf
->name
));
1874 goto facility_error
;
1877 LttEventType
*event_type
=
1878 ltt_facility_eventtype_get(f
, tf
->event
.event_id
);
1881 g_error("Unknown event id %hhu in facility %s in tracefile %s",
1883 g_quark_to_string(f
->name
),
1884 g_quark_to_string(tf
->name
));
1885 goto event_type_error
;
1888 if(event_type
->root_field
)
1889 size
= get_field_type_size(tf
, event_type
,
1890 0, 0, event_type
->root_field
, tf
->event
.data
);
1894 //g_debug("Event root field : f.e %hhu.%hhu size %zd",
1895 // tf->event.facility_id,
1896 // tf->event.event_id, size);
1899 tf
->event
.data_size
= size
;
1901 /* Check consistency between kernel and LTTV structure sizes */
1902 g_assert(tf
->event
.data_size
== tf
->event
.event_size
);
1909 tf
->event
.data_size
= 0;
1913 /* Take the tf current event offset and use the event facility id and event id
1914 * to figure out where is the next event offset.
1916 * This is an internal function not aiming at being used elsewhere : it will
1917 * not jump over the current block limits. Please consider using
1918 * ltt_tracefile_read to do this.
1920 * Returns 0 on success
1921 * ERANGE if we are at the end of the buffer.
1922 * ENOPROTOOPT if an error occured when getting the current event size.
1924 static int ltt_seek_next_event(LttTracefile
*tf
)
1929 /* seek over the buffer header if we are at the buffer start */
1930 if(tf
->event
.offset
== 0) {
1931 tf
->event
.offset
+= tf
->buffer_header_size
;
1933 if(tf
->event
.offset
== tf
->buf_size
- tf
->buffer
.lost_size
) {
1940 pos
= tf
->event
.data
;
1942 if(tf
->event
.data_size
< 0) goto error
;
1944 pos
+= (size_t)tf
->event
.data_size
;
1946 tf
->event
.offset
= pos
- tf
->buffer
.head
;
1948 if(tf
->event
.offset
== tf
->buf_size
- tf
->buffer
.lost_size
) {
1952 g_assert(tf
->event
.offset
< tf
->buf_size
- tf
->buffer
.lost_size
);
1958 g_error("Error in ltt_seek_next_event for tracefile %s",
1959 g_quark_to_string(tf
->name
));
1964 /*****************************************************************************
1966 * calc_nsecs_per_cycle : calculate nsecs per cycle for current block
1968 * 1.0 / (freq(khz) *1000) * 1000000000
1971 ****************************************************************************/
1972 /* from timer_tsc.c */
1973 #define CYC2NS_SCALE_FACTOR 10
1974 static guint32
calc_nsecs_per_cycle(LttTracefile
* tf
)
1976 //return 1e6 / (double)tf->buffer.freq;
1977 guint32 cpu_mhz
= tf
->buffer
.freq
/ 1000;
1978 guint32 cyc2ns_scale
= (1000 << CYC2NS_SCALE_FACTOR
)/cpu_mhz
;
1980 return cyc2ns_scale
;
1981 // return 1e6 / (double)tf->buffer.freq;
1984 static guint64
cycles_2_ns(LttTracefile
*tf
, guint64 cycles
)
1986 return (cycles
* tf
->buffer
.cyc2ns_scale
) >> CYC2NS_SCALE_FACTOR
;
1991 void setFieldsOffset(LttTracefile
*tf
, LttEventType
*evT
,void *evD
)
1993 LttField
* rootFld
= evT
->root_field
;
1994 // rootFld->base_address = evD;
1997 rootFld
->field_size
= getFieldtypeSize(tf
, evT
->facility
,
1998 evT
, 0,0,rootFld
, evD
);
2002 /*****************************************************************************
2004 * set_fields_offsets : set the precomputable offset of the fields
2006 * tracefile : opened trace file
2007 * event_type : the event type
2008 ****************************************************************************/
2010 void set_fields_offsets(LttTracefile
*tf
, LttEventType
*event_type
)
2012 LttField
*field
= event_type
->root_field
;
2013 enum field_status fixed_root
= FIELD_FIXED
, fixed_parent
= FIELD_FIXED
;
2016 preset_field_type_size(tf
, event_type
, 0, 0,
2017 &fixed_root
, &fixed_parent
,
2023 /*****************************************************************************
2025 * preset_field_type_size : set the fixed sizes of the field type
2028 * event_type : event type
2029 * offset_root : offset from the root
2030 * offset_parent : offset from the parent
2031 * fixed_root : Do we know a fixed offset to the root ?
2032 * fixed_parent : Do we know a fixed offset to the parent ?
2034 ****************************************************************************/
2035 void preset_field_type_size(LttTracefile
*tf
, LttEventType
*event_type
,
2036 off_t offset_root
, off_t offset_parent
,
2037 enum field_status
*fixed_root
, enum field_status
*fixed_parent
,
2040 enum field_status local_fixed_root
, local_fixed_parent
;
2044 g_assert(field
->fixed_root
== FIELD_UNKNOWN
);
2045 g_assert(field
->fixed_parent
== FIELD_UNKNOWN
);
2046 g_assert(field
->fixed_size
== FIELD_UNKNOWN
);
2048 type
= field
->field_type
;
2050 field
->fixed_root
= *fixed_root
;
2051 if(field
->fixed_root
== FIELD_FIXED
)
2052 field
->offset_root
= offset_root
;
2054 field
->offset_root
= 0;
2056 field
->fixed_parent
= *fixed_parent
;
2057 if(field
->fixed_parent
== FIELD_FIXED
)
2058 field
->offset_parent
= offset_parent
;
2060 field
->offset_parent
= 0;
2062 size_t current_root_offset
;
2063 size_t current_offset
;
2064 enum field_status current_child_status
, final_child_status
;
2067 switch(type
->type_class
) {
2072 field
->field_size
= ltt_type_size(tf
->trace
, type
);
2073 field
->fixed_size
= FIELD_FIXED
;
2076 field
->field_size
= (off_t
)event_type
->facility
->pointer_size
;
2077 field
->fixed_size
= FIELD_FIXED
;
2081 field
->field_size
= (off_t
)event_type
->facility
->long_size
;
2082 field
->fixed_size
= FIELD_FIXED
;
2087 field
->field_size
= (off_t
)event_type
->facility
->size_t_size
;
2088 field
->fixed_size
= FIELD_FIXED
;
2091 local_fixed_root
= FIELD_VARIABLE
;
2092 local_fixed_parent
= FIELD_VARIABLE
;
2093 preset_field_type_size(tf
, event_type
,
2095 &local_fixed_root
, &local_fixed_parent
,
2097 field
->fixed_size
= FIELD_VARIABLE
;
2098 field
->field_size
= 0;
2099 *fixed_root
= FIELD_VARIABLE
;
2100 *fixed_parent
= FIELD_VARIABLE
;
2103 field
->fixed_size
= FIELD_VARIABLE
;
2104 field
->field_size
= 0;
2105 *fixed_root
= FIELD_VARIABLE
;
2106 *fixed_parent
= FIELD_VARIABLE
;
2109 local_fixed_root
= FIELD_VARIABLE
;
2110 local_fixed_parent
= FIELD_VARIABLE
;
2111 preset_field_type_size(tf
, event_type
,
2113 &local_fixed_root
, &local_fixed_parent
,
2115 field
->fixed_size
= field
->child
[0]->fixed_size
;
2116 if(field
->fixed_size
== FIELD_FIXED
) {
2117 field
->field_size
= type
->element_number
* field
->child
[0]->field_size
;
2119 field
->field_size
= 0;
2120 *fixed_root
= FIELD_VARIABLE
;
2121 *fixed_parent
= FIELD_VARIABLE
;
2125 current_root_offset
= field
->offset_root
;
2127 current_child_status
= FIELD_FIXED
;
2128 for(i
=0;i
<type
->element_number
;i
++) {
2129 preset_field_type_size(tf
, event_type
,
2130 current_root_offset
, current_offset
,
2131 fixed_root
, ¤t_child_status
,
2133 if(current_child_status
== FIELD_FIXED
) {
2134 current_root_offset
+= field
->child
[i
]->field_size
;
2135 current_offset
+= field
->child
[i
]->field_size
;
2137 current_root_offset
= 0;
2141 if(current_child_status
!= FIELD_FIXED
) {
2142 *fixed_parent
= current_child_status
;
2143 field
->field_size
= 0;
2144 field
->fixed_size
= current_child_status
;
2146 field
->field_size
= current_offset
;
2147 field
->fixed_size
= FIELD_FIXED
;
2151 current_root_offset
= field
->offset_root
;
2154 final_child_status
= FIELD_FIXED
;
2155 for(i
=0;i
<type
->element_number
;i
++) {
2156 enum field_status current_root_child_status
= FIELD_FIXED
;
2157 enum field_status current_child_status
= FIELD_FIXED
;
2158 preset_field_type_size(tf
, event_type
,
2159 current_root_offset
, current_offset
,
2160 ¤t_root_child_status
, ¤t_child_status
,
2162 if(current_child_status
!= FIELD_FIXED
)
2163 final_child_status
= current_child_status
;
2165 max_size
= max(max_size
, field
->child
[i
]->field_size
);
2167 if(final_child_status
!= FIELD_FIXED
) {
2168 *fixed_root
= final_child_status
;
2169 *fixed_parent
= final_child_status
;
2170 field
->field_size
= 0;
2171 field
->fixed_size
= current_child_status
;
2173 field
->field_size
= max_size
;
2174 field
->fixed_size
= FIELD_FIXED
;
2182 /*****************************************************************************
2184 * check_fields_compatibility : Check for compatibility between two fields :
2185 * do they use the same inner structure ?
2187 * event_type1 : event type
2188 * event_type2 : event type
2191 *Returns : 0 if identical
2193 ****************************************************************************/
2194 gint
check_fields_compatibility(LttEventType
*event_type1
,
2195 LttEventType
*event_type2
,
2196 LttField
*field1
, LttField
*field2
)
2198 guint different
= 0;
2203 if(field1
== NULL
) {
2204 if(field2
== NULL
) goto end
;
2209 } else if(field2
== NULL
) {
2214 g_assert(field1
->fixed_root
!= FIELD_UNKNOWN
);
2215 g_assert(field2
->fixed_root
!= FIELD_UNKNOWN
);
2216 g_assert(field1
->fixed_parent
!= FIELD_UNKNOWN
);
2217 g_assert(field2
->fixed_parent
!= FIELD_UNKNOWN
);
2218 g_assert(field1
->fixed_size
!= FIELD_UNKNOWN
);
2219 g_assert(field2
->fixed_size
!= FIELD_UNKNOWN
);
2221 type1
= field1
->field_type
;
2222 type2
= field2
->field_type
;
2224 if(type1
->type_class
!= type2
->type_class
) {
2228 if(type1
->element_name
!= type2
->element_name
) {
2233 switch(type1
->type_class
) {
2243 if(field1
->field_size
!= field2
->field_size
) {
2249 if(type1
->element_number
!= type2
->element_number
) {
2253 for(i
=0;i
<type1
->element_number
;i
++) {
2254 if(type1
->enum_strings
[i
] != type2
->enum_strings
[i
]) {
2261 /* Two elements : size and child */
2262 g_assert(type1
->element_number
!= type2
->element_number
);
2263 for(i
=0;i
<type1
->element_number
;i
++) {
2264 if(check_fields_compatibility(event_type1
, event_type2
,
2265 field1
->child
[0], field2
->child
[0])) {
2274 if(field1
->field_size
!= field2
->field_size
) {
2278 /* Two elements : size and child */
2279 g_assert(type1
->element_number
!= type2
->element_number
);
2280 for(i
=0;i
<type1
->element_number
;i
++) {
2281 if(check_fields_compatibility(event_type1
, event_type2
,
2282 field1
->child
[0], field2
->child
[0])) {
2290 if(type1
->element_number
!= type2
->element_number
) {
2294 for(i
=0;i
<type1
->element_number
;i
++) {
2295 if(check_fields_compatibility(event_type1
, event_type2
,
2296 field1
->child
[0], field2
->child
[0])) {
2311 /*****************************************************************************
2313 * getFieldtypeSize: get the size of the field type (primitive type)
2316 * offsetRoot : offset from the root
2317 * offsetParent : offset from the parrent
2319 * evD : event data, it may be NULL
2321 * int : size of the field
2322 ****************************************************************************/
2324 static inline gint
getFieldtypeSize(LttTracefile
*tf
,
2325 LttEventType
* evT
, gint offsetRoot
,
2326 gint offsetParent
, LttField
* fld
, void *evD
)
2328 gint size
, size1
, element_number
, i
, offset1
, offset2
;
2329 LttType
* type
= fld
->field_type
;
2331 /* This likely has been tested with gcov : half of them.. */
2332 if(unlikely(fld
->field_fixed
== 1)){
2334 if(unlikely(fld
== evT
->root_field
)) {
2335 size
= fld
->field_size
;
2336 goto end_getFieldtypeSize
;
2340 /* From gcov profiling : half string, half struct, can we gain something
2341 * from that ? (Mathieu) */
2342 switch(type
->type_class
) {
2344 element_number
= (int) type
->element_number
;
2345 if(fld
->field_fixed
== -1){
2346 size
= getFieldtypeSize(tf
, evT
, offsetRoot
,
2347 0,fld
->child
[0], NULL
);
2348 if(size
== 0){ //has string or sequence
2349 fld
->field_fixed
= 0;
2351 fld
->field_fixed
= 1;
2352 size
*= element_number
;
2354 }else if(fld
->field_fixed
== 0){// has string or sequence
2356 for(i
=0;i
<element_number
;i
++){
2357 size
+= getFieldtypeSize(tf
, evT
, offsetRoot
+size
,size
,
2358 fld
->child
[0], evD
+size
);
2360 }else size
= fld
->field_size
;
2362 fld
->fixed_root
= (offsetRoot
==-1) ? 0 : 1;
2363 fld
->fixed_parent
= (offsetParent
==-1) ? 0 : 1;
2369 size1
= (int) ltt_type_size(fac
, type
);
2370 if(fld
->field_fixed
== -1){
2371 fld
->sequ_number_size
= size1
;
2372 fld
->field_fixed
= 0;
2373 size
= getFieldtypeSize(evT
, offsetRoot
,
2374 0,fld
->child
[0], NULL
);
2375 fld
->element_size
= size
;
2377 element_number
= getIntNumber(tf
,size1
,evD
);
2378 type
->element_number
= element_number
;
2379 if(fld
->element_size
> 0){
2380 size
= element_number
* fld
->element_size
;
2381 }else{//sequence has string or sequence
2383 for(i
=0;i
<element_number
;i
++){
2384 size
+= getFieldtypeSize(tf
, evT
,
2385 offsetRoot
+size
+size1
,size
+size1
,
2386 fld
->child
[0], evD
+size
+size1
);
2392 fld
->fixed_root
= (offsetRoot
==-1) ? 0 : 1;
2393 fld
->fixed_parent
= (offsetParent
==-1) ? 0 : 1;
2400 if(fld
->field_fixed
== -1){
2401 fld
->field_fixed
= 0;
2403 /* Hope my implementation is faster than strlen (Mathieu) */
2404 char *ptr
=(char*)evD
;
2406 /* from gcov : many many strings are empty, make it the common case.*/
2407 while(unlikely(*ptr
!= '\0')) { size
++; ptr
++; }
2408 //size = ptr - (char*)evD + 1; //include end : '\0'
2410 fld
->fixed_root
= (offsetRoot
==-1) ? 0 : 1;
2411 fld
->fixed_parent
= (offsetParent
==-1) ? 0 : 1;
2416 element_number
= (int) type
->element_number
;
2418 /* tested with gcov */
2419 if(unlikely(fld
->field_fixed
== -1)){
2420 offset1
= offsetRoot
;
2422 for(i
=0;i
<element_number
;i
++){
2423 size1
=getFieldtypeSize(tf
, evT
,offset1
,offset2
,
2424 fld
->child
[i
], NULL
);
2425 if(likely(size1
> 0 && size
>= 0)){
2427 if(likely(offset1
>= 0)) offset1
+= size1
;
2435 if(unlikely(size
== -1)){
2436 fld
->field_fixed
= 0;
2438 }else fld
->field_fixed
= 1;
2439 }else if(likely(fld
->field_fixed
== 0)){
2440 offset1
= offsetRoot
;
2442 for(i
=0;unlikely(i
<element_number
);i
++){
2443 size
=getFieldtypeSize(tf
, evT
, offset1
, offset2
,
2444 fld
->child
[i
], evD
+offset2
);
2449 }else size
= fld
->field_size
;
2450 fld
->fixed_root
= (offsetRoot
==-1) ? 0 : 1;
2451 fld
->fixed_parent
= (offsetParent
==-1) ? 0 : 1;
2455 if(unlikely(fld
->field_fixed
== -1)){
2456 size
= (int) ltt_type_size(LTT_GET_BO(tf
), type
);
2457 fld
->field_fixed
= 1;
2458 }else size
= fld
->field_size
;
2460 fld
->fixed_root
= (offsetRoot
==-1) ? 0 : 1;
2461 fld
->fixed_parent
= (offsetParent
==-1) ? 0 : 1;
2466 fld
->offset_root
= offsetRoot
;
2467 fld
->offset_parent
= offsetParent
;
2468 fld
->field_size
= size
;
2470 end_getFieldtypeSize
:
2476 /*****************************************************************************
2478 * ltt_get_int : get an integer number
2480 * reverse_byte_order: must we reverse the byte order ?
2481 * size : the size of the integer
2482 * ptr : the data pointer
2484 * gint64 : a 64 bits integer
2485 ****************************************************************************/
2487 gint64
ltt_get_int(gboolean reverse_byte_order
, gint size
, void *data
)
2492 case 1: val
= *((gint8
*)data
); break;
2493 case 2: val
= ltt_get_int16(reverse_byte_order
, data
); break;
2494 case 4: val
= ltt_get_int32(reverse_byte_order
, data
); break;
2495 case 8: val
= ltt_get_int64(reverse_byte_order
, data
); break;
2496 default: val
= ltt_get_int64(reverse_byte_order
, data
);
2497 g_critical("get_int : integer size %d unknown", size
);
2504 /*****************************************************************************
2506 * ltt_get_uint : get an unsigned integer number
2508 * reverse_byte_order: must we reverse the byte order ?
2509 * size : the size of the integer
2510 * ptr : the data pointer
2512 * guint64 : a 64 bits unsigned integer
2513 ****************************************************************************/
2515 guint64
ltt_get_uint(gboolean reverse_byte_order
, gint size
, void *data
)
2520 case 1: val
= *((gint8
*)data
); break;
2521 case 2: val
= ltt_get_uint16(reverse_byte_order
, data
); break;
2522 case 4: val
= ltt_get_uint32(reverse_byte_order
, data
); break;
2523 case 8: val
= ltt_get_uint64(reverse_byte_order
, data
); break;
2524 default: val
= ltt_get_uint64(reverse_byte_order
, data
);
2525 g_critical("get_uint : unsigned integer size %d unknown",
2534 /* get the node name of the system */
2536 char * ltt_trace_system_description_node_name (LttSystemDescription
* s
)
2538 return s
->node_name
;
2542 /* get the domain name of the system */
2544 char * ltt_trace_system_description_domain_name (LttSystemDescription
* s
)
2546 return s
->domain_name
;
2550 /* get the description of the system */
2552 char * ltt_trace_system_description_description (LttSystemDescription
* s
)
2554 return s
->description
;
2558 /* get the start time of the trace */
2560 LttTime
ltt_trace_system_description_trace_start_time(LttSystemDescription
*s
)
2562 return s
->trace_start
;
2566 LttTracefile
*ltt_tracefile_new()
2568 return g_new(LttTracefile
, 1);
2571 void ltt_tracefile_destroy(LttTracefile
*tf
)
2576 void ltt_tracefile_copy(LttTracefile
*dest
, const LttTracefile
*src
)
2581 /* Before library loading... */
2583 static void __attribute__((constructor
)) init(void)
2585 LTT_FACILITY_NAME_HEARTBEAT
= g_quark_from_string("heartbeat");
2586 LTT_EVENT_NAME_HEARTBEAT
= g_quark_from_string("heartbeat");
2588 LTT_TRACEFILE_NAME_FACILITIES
= g_quark_from_string("/control/facilities");