LttEventType * evT, gint offsetRoot,
gint offsetParent, LttField *fld, void *evD, LttTrace* t);
-/* read a fixed size or a block information from the file (fd) */
+/* map a fixed size or a block information from the file (fd) */
int map_block(LttTracefile * tf, unsigned int block_num);
/* calculate cycles per nsec for current block */
void getCyclePerNsec(LttTracefile * t);
-/* reinitialize the info of the block which is already in the buffer */
-void updateTracefile(LttTracefile * tf);
-
/* go to the next event */
-int skipEvent(LttTracefile * t);
-
+static int ltt_seek_next_event(LttTracefile *tf);
/* Functions to parse system.xml file (using glib xml parser) */
static void parser_start_element (GMarkupParseContext __UNUSED__ *context,
if(tf->cpu_online)
ltt_tracefile_close(tf);
}
+ g_array_free(group, TRUE);
}
gboolean ltt_tracefile_group_has_cpu_online(gpointer data)
/* Add the per cpu tracefile to the named group */
unsigned int old_len = group->len;
if(num+1 > old_len)
- g_array_set_size(group, num+1);
+ group = g_array_set_size(group, num+1);
tf = &g_array_index (group, LttTracefile, num);
if(ltt_tracefile_open(trace, path, tf)) {
return 0;
}
+/* ltt_get_facility_description
+ *
+ * Opens the trace corresponding to the requested facility (identified by fac_id
+ * and checksum).
+ *
+ * The name searched is : %trace root%/eventdefs/facname_checksum.xml
+ *
+ * Returns 0 on success, or 1 on failure.
+ */
+
+static int ltt_get_facility_description(LttFacility *f,
+ LttTrace *t)
+{
+ char desc_file_name[PATH_MAX];
+ char *text;
+ guint textlen;
+ gint err;
+
+ text = g_quark_to_string(t->pathname);
+ textlen = strlen(text);
+
+ if(textlen >= PATH_MAX) goto name_error;
+ strcpy(desc_file_name, text);
+
+ text = "/eventdefs/";
+ textlen+=strlen(text);
+ if(textlen >= PATH_MAX) goto name_error;
+ strcat(desc_file_name, text);
+
+ text = g_quark_to_string(f->name);
+ textlen+=strlen(text);
+ if(textlen >= PATH_MAX) goto name_error;
+ strcat(desc_file_name, text);
+
+ text = "_";
+ textlen+=strlen(text);
+ if(textlen >= PATH_MAX) goto name_error;
+ strcat(desc_file_name, text);
+
+ err = snprintf(desc_file_name+textlen, PATH_MAX-textlen-1,
+ "%u", f->checksum);
+ if(err) goto name_error;
+
+ textlen=strlen(desc_file_name);
+
+ text = ".xml";
+ textlen+=strlen(text);
+ if(textlen >= PATH_MAX) goto name_error;
+ strcat(desc_file_name, text);
+
+ err = ltt_facility_open(f, t, desc_file_name);
+ if(err) goto facility_error;
+
+ return 0;
+
+facility_error:
+name_error:
+ return 1;
+}
+
+static void ltt_tracefile_ids_destroy(gpointer data)
+{
+ GArray *fac_ids = (GArray *)data;
+ int i;
+ LttFacility *fac;
+
+ for(i=0; i<group->len; i++) {
+ fac = &g_array_index (fac_ids, LttFacility, i);
+ ltt_facility_close(fac);
+ }
+
+ g_array_free(array, TRUE);
+}
+
+
+/* Presumes the tracefile is already seeked at the beginning. It makes sense,
+ * because it must be done just after the opening */
+static int ltt_process_facility_tracefile(LttTracefile *tf)
+{
+ int err;
+ LttFacility *fac;
+ GArray *fac_ids;
+
+ while(1) {
+ err = ltt_tracefile_read_seek(tf);
+ if(err == EPERM) goto seek_error;;
+ else if(err == ERANGE) break; /* End of tracefile */
+
+ err = ltt_tracefile_read_update_event(tf);
+ if(err) goto update_error;
+
+ /* We are on a facility load/or facility unload/ or heartbeat event */
+ /* The rules are :
+ * * facility 0 is hardcoded : this is the core facility. It will be shown
+ * in the facility array though, and is shown as "loaded builtin" in the
+ * trace.
+ * It contains event :
+ * 0 : facility load
+ * 1 : facility unload
+ * 2 : state dump facility load
+ * Facility 1 : (heartbeat)
+ * 0 : heartbeat
+ */
+ if(tf->event.facility_id > 1) { /* Should only contain core and heartbeat
+ facilities */
+ g_warning("Error in processing facility file %s, "
+ "should not contain facility id %u.", g_quark_to_string(tf->name),
+ tf->event.facility_id);
+ err = EPERM;
+ goto fac_id_error;
+ } else if(tf->event.facility_id == 0) {
+
+ // FIXME align
+ switch((enum ltt_core_events)tf->event.event_id) {
+ case LTT_EVENT_FACILITY_LOAD:
+ struct LttFacilityLoad *fac_load_data =
+ (struct LttFacilityLoad *)tf->event.data;
+ char *fac_name =
+ (char*)(tf->event.data + sizeof(struct LttFacilityLoad));
+ fac = &g_array_index (tf->facilities_by_num, LttTracefile,
+ tf->event.);
+ g_assert(fac->exists == 0);
+ fac->name = g_quark_from_string(fac_name);
+ fac->checksum = ltt_get_uint32(LTT_GET_BO(tf),
+ fac_load_data->checksum);
+ fac->id = ltt_get_uint8(LTT_GET_BO(tf), fac_load_data->id);
+ fac->pointer_size = ltt_get_uint32(LTT_GET_BO(tf),
+ fac_load_data->pointer_size);
+ fac->size_t_size = ltt_get_uin32(LTT_GET_BO(tf),
+ fac_load_data->size_t_size);
+ fac->alignment = ltt_get_uint32(LTT_GET_BO(tf),
+ fac_load_data->alignment);
+
+ if(ltt_get_facility_description(fac, tf->trace))
+ goto facility_error;
+
+ fac->exists = 1;
+
+ fac_ids = g_datalist_get_data(tf->facilities_by_name, fac->name);
+ if(fac_ids == NULL) {
+ fac_ids = g_array_sized_new (FALSE, TRUE, sizeof(guint), 1);
+ g_datalist_set_data_full(tf->facilities_by_name, fac->name,
+ fac_ids, ltt_fac_ids_destroy);
+ }
+ g_array_append_val(fac_ids, fac->id);
+
+ break;
+ case LTT_EVENT_FACILITY_UNLOAD:
+ /* We don't care about unload : facilities ID are valid for the whole
+ * trace. They simply won't be used after the unload. */
+ break;
+ case LTT_EVENT_STATE_DUMP_FACILITY_LOAD:
+ struct LttFacilityLoad *fac_load_data =
+ (struct LttFacilityLoad *)tf->event.data;
+ char *fac_name =
+ (char*)(tf->event.data + sizeof(struct LttFacilityLoad));
+ fac = &g_array_index (tf->facilities_by_num, LttTracefile,
+ tf->event.);
+ g_assert(fac->exists == 0);
+ fac->name = g_quark_from_string(fac_name);
+ fac->checksum = ltt_get_uint32(LTT_GET_BO(tf),
+ fac_load_data->checksum);
+ fac->id = ltt_get_uint8(LTT_GET_BO(tf), fac_load_data->id);
+ fac->pointer_size = ltt_get_uint32(LTT_GET_BO(tf),
+ fac_load_data->pointer_size);
+ fac->size_t_size = ltt_get_uin32(LTT_GET_BO(tf),
+ fac_load_data->size_t_size);
+ fac->alignment = ltt_get_uint32(LTT_GET_BO(tf),
+ fac_load_data->alignment);
+ fac->events;
+ fac->named_types;
+ fac->named_types_number;
+ fac->exists = 1;
+
+ fac_ids = g_datalist_get_data(tf->facilities_by_name, fac->name);
+ if(fac_ids == NULL) {
+ fac_ids = g_array_sized_new (FALSE, TRUE, sizeof(guint), 1);
+ g_datalist_set_data_full(tf->facilities_by_name, fac->name,
+ fac_ids, ltt_fac_ids_destroy);
+ }
+ g_array_append_val(fac_ids, fac->id);
+
+ break;
+ default:
+ g_warning("Error in processing facility file %s, "
+ "unknown event id %hhu in core facility.",
+ g_quark_to_string(tf->name),
+ tf->event.event_id);
+ err = EPERM;
+ goto event_id_error;
+ }
+ } else if(tf->event.facility_id == 1) {
+
+ switch((enum ltt_heartbeat_events)tf->event.event_id) {
+ case LTT_EVENT_HEARTBEAT:
+ break;
+ default:
+ g_warning("Error in processing facility file %s, "
+ "unknown event id %hhu in heartbeat facility.",
+ g_quark_to_string(tf->name),
+ tf->event.event_id);
+ err = EPERM;
+ goto event_id_error;
+ }
+ }
+ }
+ return 0;
+
+ /* Error handling */
+facility_error:
+event_id_error:
+fac_id_error:
+update_error:
+seek_error:
+ return err;
+}
+
+
LttTrace *ltt_trace_open(const gchar *pathname)
{
gchar abs_path[PATH_MAX];
LttTrace * t;
- LttTracefile tf;
+ LttTracefile *tf;
GArray *group;
int i;
if(open_tracefiles(t, abs_path, t->tracefiles))
goto open_error;
+ /* Prepare the facilities containers : array and mapping */
+ /* Array is zeroed : the "exists" field is set to false by default */
+ t->facilities_by_num = g_array_sized_new (FALSE,
+ TRUE, sizeof(LttFacility),
+ NUM_FACILITIES);
+ t->facilities_by_num = g_array_set_size(t->facilities_by_num, NUM_FACILITIES);
+
+ g_datalist_init(t->tracefiles_by_name);
+
/* Load trace XML event descriptions */
//TODO
for(i=0; i<group->len; i++) {
tf = &g_array_index (group, LttTracefile, i);
- //TODO
- process_facility_tracefile(tf);
+ if(ltt_process_facility_tracefile(tf))
+ goto facilities_error;
}
/* Error handling */
facilities_error:
+ g_datalist_free(t->tracefiles_by_name);
+ g_array_free(t->facilities_by_num, TRUE);
open_error:
g_datalist_clear(t->tracefiles);
g_free(t);
alloc_error:
return NULL;
-
-
- LttSystemDescription * sys_description;
- gchar eventdefs[DIR_NAME_SIZE];
- gchar info[DIR_NAME_SIZE];
- gchar cpu[DIR_NAME_SIZE];
- gchar tmp[DIR_NAME_SIZE];
- gboolean has_slash = FALSE;
-
- //establish the pathname to different directories
- if(abs_path[strlen(abs_path)-1] == '/')has_slash = TRUE;
- strcpy(eventdefs,abs_path);
- if(!has_slash)strcat(eventdefs,"/");
- strcat(eventdefs,"eventdefs/");
-
- strcpy(info,abs_path);
- if(!has_slash)strcat(info,"/");
- strcat(info,"info/");
-
- strcpy(control,abs_path);
- if(!has_slash)strcat(control,"/");
- strcat(control,"control/");
-
- strcpy(cpu,abs_path);
- if(!has_slash)strcat(cpu,"/");
- strcat(cpu,"cpu/");
-
- //new trace
- sys_description = g_new(LttSystemDescription, 1);
- t = g_new(LttTrace, 1);
- t->pathname = g_strdup(abs_path);
- t->facility_number = 0;
- t->control_tracefile_number = 0;
- t->per_cpu_tracefile_number = 0;
- t->system_description = sys_description;
- t->control_tracefiles = g_ptr_array_new();
- t->per_cpu_tracefiles = g_ptr_array_new();
- t->facilities = g_ptr_array_new();
- //getDataEndianType(&(t->my_arch_size), &(t->my_arch_endian));
-
- //get system description
- strcpy(tmp,info);
- strcat(tmp,"system.xml");
- if(getSystemInfo(sys_description, tmp)) {
- g_ptr_array_free(t->facilities, TRUE);
- g_ptr_array_free(t->per_cpu_tracefiles, TRUE);
- g_ptr_array_free(t->control_tracefiles, TRUE);
- g_free(sys_description);
- g_free(t->pathname);
- g_free(t);
- return NULL;
- }
-
- /* Set the reverse byte order between trace and reader */
- if(sys_description->endian == LTT_LITTLE_ENDIAN
- && G_BYTE_ORDER != G_LITTLE_ENDIAN) {
- t->reverse_byte_order = 1;
- } else if(sys_description->endian == LTT_BIG_ENDIAN
- && G_BYTE_ORDER != G_BIG_ENDIAN) {
- t->reverse_byte_order = 1;
- } else t->reverse_byte_order = 0;
-
- //get facilities info
- if(getFacilityInfo(t,eventdefs)) {
- g_ptr_array_free(t->facilities, TRUE);
- g_ptr_array_free(t->per_cpu_tracefiles, TRUE);
- g_ptr_array_free(t->control_tracefiles, TRUE);
- g_free(sys_description);
- g_free(t->pathname);
- g_free(t);
- return NULL;
- }
-
- //get control tracefile info
- getControlFileInfo(t,control);
- /*
- if(getControlFileInfo(t,control)) {
- g_ptr_array_free(t->facilities, TRUE);
- g_ptr_array_free(t->per_cpu_tracefiles, TRUE);
- g_ptr_array_free(t->control_tracefiles, TRUE);
- g_free(sys_description);
- g_free(t->pathname);
- g_free(t);
- return NULL;
- }*/ // With fatal error
-
- //get cpu tracefile info
- if(getCpuFileInfo(t,cpu)) {
- g_ptr_array_free(t->facilities, TRUE);
- g_ptr_array_free(t->per_cpu_tracefiles, TRUE);
- g_ptr_array_free(t->control_tracefiles, TRUE);
- g_free(sys_description);
- g_free(t->pathname);
- g_free(t);
- return NULL;
- }
-
- return t;
}
-char * ltt_trace_name(LttTrace *t)
+GQuark ltt_trace_name(LttTrace *t)
{
return t->pathname;
}
return ltt_trace_open(self->pathname);
}
+//FIXME TODO
void ltt_trace_close(LttTrace *t)
{
unsigned int i;
*Get the system description of the trace
****************************************************************************/
-LttSystemDescription *ltt_trace_system_description(LttTrace *t)
+LttFacility *ltt_trace_facility_by_id(LttTrace *t, guint8 id)
{
- return t->system_description;
+ g_assert(index < t->facilities_by_num->len);
+ return &g_array_index(t->facilities_by_num, LttFacility, id);
}
-/*****************************************************************************
- * The following functions discover the facilities of the trace
- ****************************************************************************/
-
-unsigned ltt_trace_facility_number(LttTrace *t)
-{
- return (unsigned)(t->facility_number);
-}
-
-LttFacility *ltt_trace_facility_get(LttTrace *t, unsigned i)
-{
- return (LttFacility*)g_ptr_array_index(t->facilities, i);
-}
-
-/*****************************************************************************
- *Function name
- * ltt_trace_facility_find : find facilities in the trace
- *Input params
- * t : the trace
- * name : facility name
- *Output params
- * position : position of the facility in the trace
- *Return value
- * : the number of facilities
- ****************************************************************************/
-
-unsigned ltt_trace_facility_find(LttTrace *t, char *name, unsigned *position)
+/* ltt_trace_facility_get_by_name
+ *
+ * Returns the GArray of facility indexes. All the fac_ids that matches the
+ * requested facility name.
+ *
+ * If name is not found, returns NULL.
+ */
+GArray *ltt_trace_facility_get_by_name(LttTrace *t, GQuark name)
{
- unsigned int i, count=0;
- LttFacility * f;
- for(i=0;i<t->facility_number;i++){
- f = (LttFacility*)g_ptr_array_index(t->facilities, i);
- if(strcmp(f->name,name)==0){
- count++;
- if(count==1) *position = i;
- }else{
- if(count) break;
- }
- }
- return count;
+ return g_datalist_id_get_data(t->facilities_by_name, name);
}
/*****************************************************************************
return count;
}
-/* FIXME : performances could be improved with a better design for this
- * function : sequential search through a container has never been the
- * best on the critical path. */
-LttFacility * ltt_trace_facility_by_id(LttTrace * trace, unsigned id)
-{
- LttFacility * facility = NULL;
- unsigned int i;
- unsigned int num = trace->facility_number;
- GPtrArray *facilities = trace->facilities;
-
- for(i=0;unlikely(i<num);){
- LttFacility *iter_facility =
- (LttFacility*) g_ptr_array_index(facilities,i);
- unsigned base_id = iter_facility->base_id;
-
- if(likely(id >= base_id &&
- id < base_id + iter_facility->event_number)) {
- facility = iter_facility;
- break;
- } else {
- i++;
- }
- }
-
- return facility;
-}
-
LttEventType *ltt_trace_eventtype_get(LttTrace *t, unsigned evId)
{
LttEventType *event_type;
return event_type;
}
+#if 0
/*****************************************************************************
- *There is one "per cpu" tracefile for each CPU, numbered from 0 to
- *the maximum number of CPU in the system. When the number of CPU installed
- *is less than the maximum, some positions are unused. There are also a
- *number of "control" tracefiles (facilities, interrupts...).
- ****************************************************************************/
-unsigned ltt_trace_control_tracefile_number(LttTrace *t)
-{
- return t->control_tracefile_number;
-}
-
-unsigned ltt_trace_per_cpu_tracefile_number(LttTrace *t)
-{
- return t->per_cpu_tracefile_number;
-}
-
-/*****************************************************************************
- *It is possible to search for the tracefiles by name or by CPU position.
- *The index within the tracefiles of the same type is returned if found
- *and a negative value otherwise.
- ****************************************************************************/
-
-int ltt_trace_control_tracefile_find(LttTrace *t, const gchar *name)
-{
- LttTracefile * tracefile;
- unsigned int i;
- for(i=0;i<t->control_tracefile_number;i++){
- tracefile = (LttTracefile*)g_ptr_array_index(t->control_tracefiles, i);
- if(strcmp(tracefile->name, name)==0)break;
- }
- if(i == t->control_tracefile_number) return -1;
- return i;
-}
-
-/* not really useful. We just have to know that cpu tracefiles
- * comes before control tracefiles.
- */
-int ltt_trace_per_cpu_tracefile_find(LttTrace *t, const gchar *name)
-{
- LttTracefile * tracefile;
- unsigned int i;
- for(i=0;i<t->per_cpu_tracefile_number;i++){
- tracefile = (LttTracefile*)g_ptr_array_index(t->per_cpu_tracefiles, i);
- if(strcmp(tracefile->name, name)==0)break;
- }
- if(i == t->per_cpu_tracefile_number) return -1;
- return i;
-}
-
-/*****************************************************************************
- *Get a specific tracefile
+ * ltt_trace_find_tracefile
+ *
+ * Find a tracefile by name and index in the group.
+ *
+ * Returns a pointer to the tracefiles, else NULL.
****************************************************************************/
-LttTracefile *ltt_trace_control_tracefile_get(LttTrace *t, unsigned i)
+LttTracefile *ltt_trace_find_tracefile(LttTrace *t, const gchar *name)
{
- return (LttTracefile*)g_ptr_array_index(t->control_tracefiles, i);
-}
-
-LttTracefile *ltt_trace_per_cpu_tracefile_get(LttTrace *t, unsigned i)
-{
- return (LttTracefile*)g_ptr_array_index(t->per_cpu_tracefiles, i);
}
+#endif //0
/*****************************************************************************
* Get the start time and end time of the trace
*Get the name of a tracefile
****************************************************************************/
-char *ltt_tracefile_name(LttTracefile *tf)
+GQuark ltt_tracefile_name(LttTracefile *tf)
{
return tf->name;
}
* Get the number of blocks in the tracefile
****************************************************************************/
-unsigned ltt_tracefile_block_number(LttTracefile *tf)
+guint ltt_tracefile_block_number(LttTracefile *tf)
{
return tf->block_number;
}
* You MUST NOT do a ltt_tracefile_read right after a ltt_tracefile_seek_time :
* you will jump over an event if you do.
*
+ * Return value : 0 : no error, the tf->event can be used
+ * otherwise : this is an error.
+ *
* */
-void ltt_tracefile_seek_time(LttTracefile *tf, LttTime time)
+int ltt_tracefile_seek_time(LttTracefile *tf, LttTime time)
{
+ int ret = 0;
int err;
unsigned int block_num, high, low;
/* If the time is lower or equal the beginning of the trace,
* go to the first event. */
if(ltt_time_compare(time, tf->buffer.start.timestamp) <= 0) {
- ltt_tracefile_read(tf)
+ ret = ltt_tracefile_read(tf)
goto found; /* There is either no event in the trace or the event points
to the first event in the trace */
}
/* If the time is after the end of the trace, get the last event. */
if(ltt_time_compare(time, tf->buffer.end.timestamp) >= 0) {
- /* While the ltt_tracefile_read_event doesn't return NULL, continue reading
+ /* While the ltt_tracefile_read doesn't return ERANGE or EPERM,
+ * continue reading.
*/
- while(ltt_tracefile_read(tf));
- goto found;
+ while(1) {
+ ret = ltt_tracefile_read(tf);
+ if(ret == ERANGE) goto found; /* ERANGE or EPERM */
+ else if(ret) goto fail;
+ }
}
/* Binary search the block */
/* The event is right in the buffer!
* (or in the next buffer first event) */
while(1) {
- ltt_tracefile_read(tf);
+ ret = ltt_tracefile_read(tf);
+ if(ret == ERANGE) goto found; /* ERANGE or EPERM */
+ else if(ret) goto fail;
+
if(ltt_time_compare(time, tf->event.event_time) >= 0)
break;
}
(or in the next buffer first event) */
while(1) {
ltt_tracefile_read(tf);
+ if(ret == ERANGE) goto found; /* ERANGE or EPERM */
+ else if(ret) goto fail;
+
if(ltt_time_compare(time, tf->event.event_time) >= 0)
break;
}
}
found:
-
- return;
+ return 0;
/* Error handling */
fail:
g_error("ltt_tracefile_seek_time failed on tracefile %s",
g_quark_to_string(tf->name));
+ return EPERM;
}
tf->event.offset = ep->offset;
- if(!ltt_tracefile_read(tf)) goto fail;
-
+ err = ltt_tracefile_read_update_event(tf);
+ if(err) goto fail;
+ err = ltt_tracefile_read_op(tf);
+ if(err) goto fail;
+
return;
fail:
g_quark_to_string(tf->name));
}
-
-
-/*****************************************************************************
- * Seek to the first event with position equal or larger to ep
- *
- * Modified by Mathieu Desnoyers to used faster offset position instead of
- * re-reading the whole buffer.
- ****************************************************************************/
-
-void ltt_tracefile_seek_position(LttTracefile *t, const LttEventPosition *ep)
-{
- //if we are at the right place, just return
- if(likely(t->which_block == ep->block_num && t->which_event == ep->event_num))
- return;
-
- if(likely(t->which_block == ep->block_num)) updateTracefile(t);
- else readBlock(t,ep->block_num);
- //event offset is available
- if(likely(ep->old_position)){
- int err;
-
- t->which_event = ep->event_num;
- t->cur_event_pos = t->buffer + ep->event_offset;
- t->prev_event_time = ep->event_time;
- t->current_event_time = ep->event_time;
- t->cur_heart_beat_number = ep->heart_beat_number;
- t->cur_cycle_count = ep->event_cycle_count;
-
- /* This is a workaround for fast position seek */
- t->last_event_pos = ep->last_event_pos;
- t->prev_block_end_time = ep->prev_block_end_time;
- t->prev_event_time = ep->prev_event_time;
- t->pre_cycle_count = ep->pre_cycle_count;
- t->count = ep->count;
- t->overflow_nsec = ep->overflow_nsec;
- t->last_heartbeat = ep->last_heartbeat;
- /* end of workaround */
-
- //update the fields of the current event and go to the next event
- err = skipEvent(t);
- if(unlikely(err == ERANGE)) g_error("event id is out of range\n");
-
- return;
- }
-
- //only block number and event index are available
- //MD: warning : this is slow!
- g_warning("using slow O(n) tracefile seek position");
-
- LttEvent event;
- while(likely(t->which_event < ep->event_num)) ltt_tracefile_read(t, &event);
-
- return;
-}
-
/* Calculate the real event time based on the buffer boundaries */
LttTime ltt_interpolate_time(LttTracefile *tf, LttEvent *event)
{
return time;
}
-
/*****************************************************************************
*Function name
* ltt_tracefile_read : Read the next event in the tracefile
*Input params
* t : tracefile
*Return value
- * LttEvent * : an event to be processed
- * Note : it points to the current tf->event. It will be overwritten
- * by the next call to ltt_tracefile_read or any map_block.
- *
- * Returns NULL on end of trace (or error).
*
+ * Returns 0 if an event can be used in tf->event.
+ * Returns ERANGE on end of trace. The event in tf->event still can be used.
+ * Returns EPERM on error.
*
* This function does make the tracefile event structure point to the event
- * currently pointed to by the
+ * currently pointed to by the tf->event.
+ *
+ * Note : you must call a ltt_tracefile_seek to the beginning of the trace to
+ * reinitialize it after an error if you want results to be coherent.
+ * It would be the case if a end of trace last buffer has no event : the end
+ * of trace wouldn't be returned, but an error.
+ * We make the assumption there is at least one event per buffer.
****************************************************************************/
-LttEvent *ltt_tracefile_read(LttTracefile *tf)
+int ltt_tracefile_read(LttTracefile *tf)
+{
+ int err;
+
+ err = ltt_tracefile_read_seek(tf);
+ if(err) return err;
+ err = ltt_tracefile_read_update_event(tf);
+ if(err) return err;
+ err = ltt_tracefile_read_op(tf);
+ if(err) return err;
+
+ return 0;
+}
+
+int ltt_tracefile_read_seek(LttTracefile *tf)
+{
+ int err;
+
+ /* Get next buffer until we finally have an event, or end of trace */
+ while(1) {
+ err = ltt_seek_next_event(tf);
+ if(unlikely(err == ENOPROTOOPT)) {
+ return EPERM;
+ }
+
+ /* Are we at the end of the buffer ? */
+ if(err == ERANGE) {
+ if(unlikely(tf->buffer.index == tf->num_blocks-1)){ /* end of trace ? */
+ return ERANGE;
+ } else {
+ /* get next block */
+ err = map_block(tf, tf->buffer.index + 1);
+ if(unlikely(err)) {
+ g_error("Can not map block");
+ return EPERM;
+ }
+ }
+ } else break; /* We found an event ! */
+ }
+
+ return 0;
+}
+
+
+/* do specific operation on events */
+int ltt_tracefile_read_op(LttTracefile *tf)
{
int err;
LttFacility *f;
void * pos;
-
- /* Skip the current event to go to the next, or point to the
- * t->buffer.head + t->buffer.lost_size if we were on the last
- * event of a buffer.
- */
- err = ltt_seek_next_event(tf);
- if(unlikely(err == ERANGE)) {
- g_error("event id is out of range\n");
- return NULL;
- }
+ LttEvent *event;
- pos = tf->event.offset;
+ event = &tf->event;
- /* Are we at the end of the buffer ? */
- if(unlikely(pos == tf->buffer.head + tf->buffer.lost_size)) {
- if(unlikely(tf->buffer.index == tf->num_blocks-1)){ /* end of trace ? */
- return NULL;
- } else {
- /* get next block */
- err = map_block(tf, tf->buffer.index + 1);
- if(unlikely(err)) {
- g_error("Can not map block");
- return NULL;
- }
- /* seek to the first event */
- err = ltt_seek_next_event(tf);
- if(unlikely(err == ERANGE)) {
- g_error("event id is out of range\n");
- return NULL;
- }
+ /* do event specific operation */
+
+ /* do something if its an heartbeat event : increment the heartbeat count */
+ if(event->facility_id != 0) { /* except core */
+ f = (LttFacility*)g_ptr_array_index(tf->trace->facilities,
+ event->facility_id);
+ g_assert(f != NULL);
- pos = tf->event.offset;
+ if(unlikely(ltt_facility_name(f)
+ != LTT_FACILITY_NAME_HEARTBEAT)) {
+ LttEventType *et = ltt_facility_eventtype_get_by_name(f,
+ LTT_EVENT_NAME_HEARTBEAT);
+ if(et->id == event->event_id)
+ t->cur_heart_beat_number++;
}
}
+
+ return 0;
+}
+
+
+/* same as ltt_tracefile_read, but does not seek to the next event nor call
+ * event specific operation. */
+int ltt_tracefile_read_update_event(LttTracefile *tf)
+{
+ int err;
+ LttFacility *f;
+ void * pos;
+ LttEvent *event;
+
+ event = &tf->event;
+ pos = event->offset;
/* Read event header */
if(tf->trace->has_tsc) {
event->time.timestamp = ltt_get_uint32(LTT_GET_BO(t),
- tf->cur_event_pos);
+ pos);
/* 32 bits -> 64 bits tsc */
+ /* note : still works for seek and non seek cases. */
if(event->time.timestamp < (0xFFFFFFFFULL&tf->buffer.tsc)) {
tf->buffer.tsc = ((tf->buffer.tsc&0xFFFFFFFF00000000ULL)
+ 0x100000000ULL)
| (guint64)event->time.timestamp;
-
- event->event_time = ltt_interpolate_time(tf, event);
} else {
/* no overflow */
tf->buffer.tsc = (tf->buffer.tsc&0xFFFFFFFF00000000ULL)
| (guint64)event->time.timestamp;
}
+
+ event->event_time = ltt_interpolate_time(tf, event);
+
pos += sizeof(uint32);
} else {
event->time.delta = ltt_get_uint32(LTT_GET_BO(tf),
- tf->cur_event_pos);
+ pos);
tf->buffer.tsc = 0;
event->event_time = ltt_time_add(tf->buffer.begin.timestamp,
event->data = pos;
- /* do event specific operation */
-
- /* do something if its an heartbeat event : increment the heartbeat count */
- if(event->facility_id != 0) { /* except core */
- f = (LttFacility*)g_ptr_array_index(tf->trace->facilities,
- event->facility_id);
- g_assert(f != NULL);
-
- if(unlikely(ltt_facility_name(f)
- != LTT_FACILITY_NAME_HEARTBEAT)) {
- LttEventType *et = ltt_facility_eventtype_get_by_name(f,
- LTT_EVENT_NAME_HEARTBEAT);
- if(et->id == event->event_id)
- t->cur_heart_beat_number++;
-
- }
- }
-
- return event;
+ return 0;
}
-/****************************************************************************
- *Function name
- * readFile : wrap function to read from a file
- *Input Params
- * fd : file descriptor
- * buf : buf to contain the content
- * size : number of bytes to be read
- * mesg : message to be printed if some thing goes wrong
- *return value
- * 0 : success
- * EIO : can not read from the file
- ****************************************************************************/
-#if 0
-int readFile(int fd, void * buf, size_t size, char * mesg)
-{
- ssize_t nbBytes = read(fd, buf, size);
-
- if((size_t)nbBytes != size) {
- if(nbBytes < 0) {
- perror("Error in readFile : ");
- } else {
- g_warning("%s",mesg);
- }
- return EIO;
- }
- return 0;
-}
-#endif //0
/****************************************************************************
*Function name
}
-/*****************************************************************************
- *Function name
- * updateTracefile : reinitialize the info of the block which is already
- * in the buffer
- *Input params
- * tf : tracefile
- ****************************************************************************/
-
-void updateTracefile(LttTracefile * tf)
-{
- tf->which_event = 1;
- tf->cur_event_pos = tf->buffer;
- tf->current_event_time = getEventTime(tf);
- tf->cur_heart_beat_number = 0;
-
- tf->prev_event_time.tv_sec = 0;
- tf->prev_event_time.tv_nsec = 0;
- tf->count = 0;
-
- tf->overflow_nsec =
- (-((double)ltt_get_uint64(tf->trace->reverse_byte_order,
- &tf->a_block_start->cycle_count))
- * tf->nsec_per_cycle);
-
-}
-
/* Take the tf current event offset and use the event facility id and event id
* to figure out where is the next event offset.
*
*
* Returns 0 on success
* ERANGE if we are at the end of the buffer.
+ * ENOPROTOOPT if an error occured when getting the current event size.
*/
static int ltt_seek_next_event(LttTracefile *tf)
{
+ int ret = 0;
void *pos;
/* seek over the buffer header if we are at the buffer start */
goto found;
}
- /* if we are at the end of a buffer, generate an error, not supposed to
- * happen. */
- if(tf->event.offset == tf->buffer.head + tf->buffer.lost_size)
- goto error;
+
+ if(tf->event.offset == tf->buffer.head + tf->buffer.lost_size) {
+ ret = ERANGE;
+ goto found;
+ }
pos = tf->event.data;
+ /* FIXME : do this function. Remember to hardcode the sizes of heartbeat and
+ * core */
pos += ltt_facility_get_event_size(tf->event.facility_id, tf->event.event_id);
+ on error : goto error;
tf->event.offset = pos;
found:
- return 0;
+ return ret;
error:
g_error("Error in ltt_seek_next_event for tracefile %s",
g_quark_to_string(tf->name));
- return ERANGE;
+ return ENOPROTOOPT;
}
return i;
}
-#if 0
-/*****************************************************************************
- *Function name
- * getDataEndianType : get the data type size and endian type of the local
- * machine
- *Input params
- * size : size of data type
- * endian : endian type, little or big
- ****************************************************************************/
-void getDataEndianType(LttArchSize * size, LttArchEndian * endian)
-{
- int i = 1;
- char c = (char) i;
- int sizeInt=sizeof(int), sizeLong=sizeof(long), sizePointer=sizeof(void *);
-
- if(c == 1) *endian = LTT_LITTLE_ENDIAN;
- else *endian = LTT_BIG_ENDIAN;
-
- if(sizeInt == 2 && sizeLong == 4 && sizePointer == 4)
- *size = LTT_LP32;
- else if(sizeInt == 4 && sizeLong == 4 && sizePointer == 4)
- *size = LTT_ILP32;
- else if(sizeInt == 4 && sizeLong == 8 && sizePointer == 8)
- *size = LTT_LP64;
- else if(sizeInt == 8 && sizeLong == 8 && sizePointer == 8)
- *size = LTT_ILP64;
- else *size = LTT_UNKNOWN;
-}
-#endif //0
/* get the node name of the system */
char * ltt_trace_system_description_node_name (LttSystemDescription * s)
projects / lttv.git / blobdiff