X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=ltt%2Fbranches%2Fpoly%2Flttv%2Flttv%2Ftracecontext.c;h=5ecdae22b4f0af9499cca9be71b1d9ea396e856c;hb=f63ebe5196f36fcf40385d29cfc37288c4d70817;hp=89d792c5b86021a701b514eb06670b1c191d3230;hpb=d3e01c7a1f640d3b08fd896b29f4ad72e65033a9;p=lttv.git diff --git a/ltt/branches/poly/lttv/lttv/tracecontext.c b/ltt/branches/poly/lttv/lttv/tracecontext.c index 89d792c5..5ecdae22 100644 --- a/ltt/branches/poly/lttv/lttv/tracecontext.c +++ b/ltt/branches/poly/lttv/lttv/tracecontext.c @@ -16,43 +16,57 @@ * MA 02111-1307, USA. */ +#ifdef HAVE_CONFIG_H +#include +#endif +#include +#include #include #include #include #include #include +#include +#include - +#define min(a,b) (((a)<(b))?(a):(b)) gint compare_tracefile(gconstpointer a, gconstpointer b) { - gint comparison; - - LttvTracefileContext *trace_a = (LttvTracefileContext *)a; - - LttvTracefileContext *trace_b = (LttvTracefileContext *)b; - - if(trace_a == trace_b) return 0; - comparison = ltt_time_compare(trace_a->timestamp, trace_b->timestamp); - if(comparison != 0) return comparison; - if(trace_a->index < trace_b->index) return -1; - else if(trace_a->index > trace_b->index) return 1; - if(trace_a->t_context->index < trace_b->t_context->index) return -1; - else if(trace_a->t_context->index > trace_b->t_context->index) return 1; - g_assert(FALSE); + gint comparison = 0; + + const LttvTracefileContext *trace_a = (const LttvTracefileContext *)a; + const LttvTracefileContext *trace_b = (const LttvTracefileContext *)b; + + if(likely(trace_a != trace_b)) { + comparison = ltt_time_compare(trace_a->timestamp, trace_b->timestamp); + if(unlikely(comparison == 0)) { + if(trace_a->index < trace_b->index) comparison = -1; + else if(trace_a->index > trace_b->index) comparison = 1; + else if(trace_a->t_context->index < trace_b->t_context->index) + comparison = -1; + else if(trace_a->t_context->index > trace_b->t_context->index) + comparison = 1; + } + } + return comparison; } -struct _LttvTraceContextPosition { - LttEventPosition **tf_pos; /* Position in each tracefile */ - guint nb_tracefile; /* Number of tracefiles (check) */ -}; +typedef struct _LttvTracefileContextPosition { + LttEventPosition *event; + LttvTracefileContext *tfc; + gboolean used; /* Tells if the tfc is at end of traceset position */ +} LttvTracefileContextPosition; + struct _LttvTracesetContextPosition { - LttvTraceContextPosition *t_pos; /* Position in each trace */ - guint nb_trace; /* Number of traces (check) */ - LttTime timestamp; /* Current time at the saved position */ + GArray *tfcp; /* Array of LttvTracefileContextPosition */ + LttTime timestamp; /* Current time at the saved position */ + /* If ltt_time_infinite : no position is + * set, else, a position is set (may be end + * of trace, with ep->len == 0) */ }; void lttv_context_init(LttvTracesetContext *self, LttvTraceset *ts) @@ -121,6 +135,8 @@ static void lttv_traceset_context_compute_time_span( trace = tc->t; ltt_trace_time_span_get(trace, &s, &e); + tc->time_span.start_time = s; + tc->time_span.end_time = e; if(i==0){ time_span->start_time = s; @@ -138,17 +154,37 @@ static void lttv_traceset_context_compute_time_span( } } +static void init_tracefile_context(LttTracefile *tracefile, + LttvTraceContext *tc) +{ + LttvTracefileContext *tfc; + LttvTracesetContext *tsc = tc->ts_context; + + tfc = LTTV_TRACESET_CONTEXT_GET_CLASS(tsc)->new_tracefile_context(tsc); + + tfc->index = tc->tracefiles->len; + tc->tracefiles = g_array_append_val(tc->tracefiles, tfc); + + tfc->tf = tracefile; + + tfc->t_context = tc; + tfc->event = lttv_hooks_new(); + tfc->event_by_id = lttv_hooks_by_id_new(); + tfc->a = g_object_new(LTTV_ATTRIBUTE_TYPE, NULL); + tfc->target_pid = -1; +} + static void init(LttvTracesetContext *self, LttvTraceset *ts) { - guint i, j, nb_trace, nb_control, nb_per_cpu, nb_tracefile; + guint i, nb_trace; LttvTraceContext *tc; - LttvTracefileContext *tfc; + GData **tracefiles_groups; - LttTime null_time = {0, 0}; + struct compute_tracefile_group_args args; nb_trace = lttv_traceset_number(ts); self->ts = ts; @@ -165,6 +201,20 @@ init(LttvTracesetContext *self, LttvTraceset *ts) tc->t = lttv_trace(tc->vt); tc->a = g_object_new(LTTV_ATTRIBUTE_TYPE, NULL); tc->t_a = lttv_trace_attribute(tc->vt); + tc->tracefiles = g_array_sized_new(FALSE, TRUE, + sizeof(LttvTracefileContext*), 10); + + tracefiles_groups = ltt_trace_get_tracefiles_groups(tc->t); + if(tracefiles_groups != NULL) { + args.func = (ForEachTraceFileFunc)init_tracefile_context; + args.func_args = tc; + + g_datalist_foreach(tracefiles_groups, + (GDataForeachFunc)compute_tracefile_group, + &args); + } + +#if 0 nb_control = ltt_trace_control_tracefile_number(tc->t); nb_per_cpu = ltt_trace_per_cpu_tracefile_number(tc->t); nb_tracefile = nb_control + nb_per_cpu; @@ -183,15 +233,19 @@ init(LttvTracesetContext *self, LttvTraceset *ts) tfc->control = FALSE; tfc->tf = ltt_trace_per_cpu_tracefile_get(tc->t, j - nb_control); } + tfc->t_context = tc; tfc->e = ltt_event_new(); tfc->event = lttv_hooks_new(); tfc->event_by_id = lttv_hooks_by_id_new(); tfc->a = g_object_new(LTTV_ATTRIBUTE_TYPE, NULL); } +#endif //0 + } + self->sync_position = lttv_traceset_context_position_new(self); self->pqueue = g_tree_new(compare_tracefile); - lttv_process_traceset_seek_time(self, null_time); + lttv_process_traceset_seek_time(self, ltt_time_zero); lttv_traceset_context_compute_time_span(self, &self->time_span); } @@ -203,14 +257,13 @@ void fini(LttvTracesetContext *self) LttvTraceContext *tc; - LttvTracefileContext *tfc; + LttvTracefileContext **tfc; LttvTraceset *ts = self->ts; - //FIXME : segfault - g_tree_destroy(self->pqueue); g_object_unref(self->a); + lttv_traceset_context_position_destroy(self->sync_position); nb_trace = lttv_traceset_number(ts); @@ -219,18 +272,16 @@ void fini(LttvTracesetContext *self) g_object_unref(tc->a); - nb_tracefile = ltt_trace_control_tracefile_number(tc->t) + - ltt_trace_per_cpu_tracefile_number(tc->t); + nb_tracefile = tc->tracefiles->len; for(j = 0 ; j < nb_tracefile ; j++) { - tfc = tc->tracefiles[j]; - ltt_event_destroy(tfc->e); - lttv_hooks_destroy(tfc->event); - lttv_hooks_by_id_destroy(tfc->event_by_id); - g_object_unref(tfc->a); - g_object_unref(tfc); + tfc = &g_array_index(tc->tracefiles, LttvTracefileContext*, j); + lttv_hooks_destroy((*tfc)->event); + lttv_hooks_by_id_destroy((*tfc)->event_by_id); + g_object_unref((*tfc)->a); + g_object_unref(*tfc); } - g_free(tc->tracefiles); + g_array_free(tc->tracefiles, TRUE); g_object_unref(tc); } g_free(self->traces); @@ -303,15 +354,15 @@ void lttv_trace_context_add_hooks(LttvTraceContext *self, { guint i, nb_tracefile; - LttvTracefileContext *tfc; + LttvTracefileContext **tfc; lttv_hooks_call(before_trace, self); - nb_tracefile = ltt_trace_control_tracefile_number(self->t) + - ltt_trace_per_cpu_tracefile_number(self->t); + + nb_tracefile = self->tracefiles->len; for(i = 0 ; i < nb_tracefile ; i++) { - tfc = self->tracefiles[i]; - lttv_tracefile_context_add_hooks(tfc, + tfc = &g_array_index(self->tracefiles, LttvTracefileContext*, i); + lttv_tracefile_context_add_hooks(*tfc, before_tracefile, event, event_by_id); @@ -328,14 +379,13 @@ void lttv_trace_context_remove_hooks(LttvTraceContext *self, { guint i, nb_tracefile; - LttvTracefileContext *tfc; + LttvTracefileContext **tfc; - nb_tracefile = ltt_trace_control_tracefile_number(self->t) + - ltt_trace_per_cpu_tracefile_number(self->t); + nb_tracefile = self->tracefiles->len; for(i = 0 ; i < nb_tracefile ; i++) { - tfc = self->tracefiles[i]; - lttv_tracefile_context_remove_hooks(tfc, + tfc = &g_array_index(self->tracefiles, LttvTracefileContext*, i); + lttv_tracefile_context_remove_hooks(*tfc, after_tracefile, event, event_by_id); @@ -349,19 +399,19 @@ void lttv_tracefile_context_add_hooks(LttvTracefileContext *self, LttvHooks *event, LttvHooksById *event_by_id) { - guint i; + guint i, index; LttvHooks *hook; lttv_hooks_call(before_tracefile, self); lttv_hooks_add_list(self->event, event); - if(event_by_id != NULL) - for(i = 0; i < lttv_hooks_by_id_max_id(event_by_id); i++) { - hook = lttv_hooks_by_id_get(self->event_by_id, i); - if(hook != NULL) - lttv_hooks_remove_list(hook, lttv_hooks_by_id_get(event_by_id, i)); + if(event_by_id != NULL) { + for(i = 0; i < event_by_id->array->len; i++) { + index = g_array_index(event_by_id->array, guint, i); + hook = lttv_hooks_by_id_find(self->event_by_id, index); + lttv_hooks_add_list(hook, lttv_hooks_by_id_get(event_by_id, index)); } - + } } void lttv_tracefile_context_remove_hooks(LttvTracefileContext *self, @@ -369,17 +419,19 @@ void lttv_tracefile_context_remove_hooks(LttvTracefileContext *self, LttvHooks *event, LttvHooksById *event_by_id) { - guint i; + guint i, index; LttvHooks *hook; - lttv_hooks_remove_list(self->event, event); - if(event_by_id != NULL) - for(i = 0; i < lttv_hooks_by_id_max_id(event_by_id); i++) { - hook = lttv_hooks_by_id_find(self->event_by_id, i); - lttv_hooks_add_list(hook, lttv_hooks_by_id_get(event_by_id, i)); + if(event_by_id != NULL) { + for(i = 0; i < event_by_id->array->len; i++) { + index = g_array_index(event_by_id->array, guint, i); + hook = lttv_hooks_by_id_get(self->event_by_id, index); + if(hook != NULL) + lttv_hooks_remove_list(hook, lttv_hooks_by_id_get(event_by_id, index)); } + } lttv_hooks_call(after_tracefile, self); } @@ -465,7 +517,8 @@ lttv_traceset_context_get_type(void) NULL, /* class_data */ sizeof (LttvTracesetContext), 0, /* n_preallocs */ - (GInstanceInitFunc) traceset_context_instance_init /* instance_init */ + (GInstanceInitFunc) traceset_context_instance_init, /* instance_init */ + NULL /* Value handling */ }; type = g_type_register_static (G_TYPE_OBJECT, "LttvTracesetContextType", @@ -513,7 +566,8 @@ lttv_trace_context_get_type(void) NULL, /* class_data */ sizeof (LttvTraceContext), 0, /* n_preallocs */ - (GInstanceInitFunc) trace_context_instance_init /* instance_init */ + (GInstanceInitFunc) trace_context_instance_init, /* instance_init */ + NULL /* Value handling */ }; type = g_type_register_static (G_TYPE_OBJECT, "LttvTraceContextType", @@ -561,7 +615,8 @@ lttv_tracefile_context_get_type(void) NULL, /* class_data */ sizeof (LttvTracefileContext), 0, /* n_preallocs */ - (GInstanceInitFunc) tracefile_context_instance_init /* instance_init */ + (GInstanceInitFunc) tracefile_context_instance_init, /* instance_init */ + NULL /* Value handling */ }; type = g_type_register_static (G_TYPE_OBJECT, "LttvTracefileContextType", @@ -572,48 +627,40 @@ lttv_tracefile_context_get_type(void) -gboolean get_first(gpointer key, gpointer value, gpointer user_data) { +static gboolean get_first(gpointer key, gpointer value, gpointer user_data) { + g_assert(key == value); *((LttvTracefileContext **)user_data) = (LttvTracefileContext *)value; return TRUE; } +#ifdef DEBUG +// Test to see if pqueue is traversed in the right order. +static LttTime test_time; -/* Put all the tracefiles at the tracefile context position */ -void lttv_process_traceset_synchronize_tracefiles(LttvTracesetContext *self) -{ - guint iter_trace, nb_trace; +static gboolean test_tree(gpointer key, gpointer value, gpointer user_data) { - LttvTraceContext *tc; + LttvTracefileContext *tfc = (LttvTracefileContext *)key; - nb_trace = lttv_traceset_number(self->ts); + g_debug("Tracefile name %s, time %lu.%lu, tfi %u, ti %u", + g_quark_to_string(ltt_tracefile_name(tfc->tf)), + tfc->timestamp.tv_sec, tfc->timestamp.tv_nsec, + tfc->index, tfc->t_context->index); - for(iter_trace = 0 ; iter_trace < nb_trace ; iter_trace++) { - tc = self->traces[iter_trace]; - { - /* each trace */ - guint iter_tf, nb_tracefile; - - LttvTracefileContext *tfc; - - nb_tracefile = ltt_trace_control_tracefile_number(tc->t) + - ltt_trace_per_cpu_tracefile_number(tc->t); - - for(iter_tf = 0 ; iter_tf < nb_tracefile ; iter_tf++) { - tfc = tc->tracefiles[iter_tf]; - { - /* each tracefile */ - //ltt_tracefile_copy(tfc->tf_sync_data, tfc->tf); - LttEventPosition *ep = ltt_event_position_new(); - - ltt_event_position(tfc->e, ep); - - ltt_tracefile_seek_position(tfc->tf, ep); - g_free(ep); - } - } - } + if(user_data != NULL) { + if(((LttvTracefileContext *)user_data) == (LttvTracefileContext *)value) { + g_assert(compare_tracefile(user_data, value) == 0); + } else + g_assert(compare_tracefile(user_data, value) != 0); } + g_assert(ltt_time_compare(test_time, tfc->timestamp) <= 0); + test_time.tv_sec = tfc->timestamp.tv_sec; + test_time.tv_nsec = tfc->timestamp.tv_nsec; + + + //g_assert(((LttvTracefileContext *)user_data) != (LttvTracefileContext *)value); + return FALSE; } +#endif //DEBUG @@ -636,6 +683,8 @@ void lttv_process_traceset_begin(LttvTracesetContext *self, } +//enum read_state { LAST_NONE, LAST_OK, LAST_EMPTY }; + /* Note : a _middle must be preceded from a _seek or another middle */ guint lttv_process_traceset_middle(LttvTracesetContext *self, LttTime end, @@ -644,13 +693,19 @@ guint lttv_process_traceset_middle(LttvTracesetContext *self, { GTree *pqueue = self->pqueue; - guint id; + guint fac_id, ev_id, id; LttvTracefileContext *tfc; + LttEvent *e; + unsigned count = 0; - gboolean last_ret = FALSE; /* return value of the last hook list called */ + guint read_ret; + + //enum read_state last_read_state = LAST_NONE; + + gint last_ret = 0; /* return value of the last hook list called */ /* Get the next event from the pqueue, call its hooks, reinsert in the pqueue the following event from the same tracefile @@ -661,7 +716,7 @@ guint lttv_process_traceset_middle(LttvTracesetContext *self, tfc = NULL; g_tree_foreach(pqueue, get_first, &tfc); /* End of traceset : tfc is NULL */ - if(tfc == NULL) + if(unlikely(tfc == NULL)) { return count; } @@ -674,29 +729,84 @@ guint lttv_process_traceset_middle(LttvTracesetContext *self, * break the loop. */ - if(last_ret == TRUE || - count >= nb_events || + if(unlikely(last_ret == TRUE || + ((count >= nb_events) && (nb_events != G_MAXULONG)) || (end_position!=NULL&<tv_traceset_context_ctx_pos_compare(self, end_position) == 0)|| - ltt_time_compare(tfc->timestamp, end) >= 0) + ltt_time_compare(end, tfc->timestamp) <= 0)) { return count; } - + /* Get the tracefile with an event for the smallest time found. If two or more tracefiles have events for the same time, hope that lookup and remove are consistent. */ - + +#ifdef DEBUG + test_time.tv_sec = 0; + test_time.tv_nsec = 0; + g_debug("test tree before remove"); + g_tree_foreach(pqueue, test_tree, tfc); +#endif //DEBUG g_tree_remove(pqueue, tfc); - count++; - id = ltt_event_eventtype_id(tfc->e); +#ifdef DEBUG + test_time.tv_sec = 0; + test_time.tv_nsec = 0; + g_debug("test tree after remove"); + g_tree_foreach(pqueue, test_tree, tfc); +#endif //DEBUG + + + e = ltt_tracefile_get_event(tfc->tf); + + //if(last_read_state != LAST_EMPTY) { + /* Only call hooks if the last read has given an event or if we are at the + * first pass (not if last read returned end of tracefile) */ + count++; + + fac_id = ltt_event_facility_id(e); + ev_id = ltt_event_eventtype_id(e); + id = GET_HOOK_ID(fac_id, ev_id); + tfc->target_pid = -1; /* unset target PID */ + /* Hooks : + * return values : 0 : continue read, 1 : go to next position and stop read, + * 2 : stay at the current position and stop read */ last_ret = lttv_hooks_call_merge(tfc->event, tfc, lttv_hooks_by_id_get(tfc->event_by_id, id), tfc); - if(ltt_tracefile_read(tfc->tf, tfc->e) != NULL) { - tfc->timestamp = ltt_event_time(tfc->e); +#if 0 + /* This is buggy : it won't work well with state computation */ + if(unlikely(last_ret == 2)) { + /* This is a case where we want to stay at this position and stop read. */ + g_tree_insert(pqueue, tfc, tfc); + return count - 1; + } +#endif //0 + read_ret = ltt_tracefile_read(tfc->tf); + + + if(likely(!read_ret)) { + //g_debug("An event is ready"); + tfc->timestamp = ltt_event_time(e); + g_assert(ltt_time_compare(tfc->timestamp, ltt_time_infinite) != 0); g_tree_insert(pqueue, tfc, tfc); +#ifdef DEBUG + test_time.tv_sec = 0; + test_time.tv_nsec = 0; + g_debug("test tree after event ready"); + g_tree_foreach(pqueue, test_tree, NULL); +#endif //DEBUG + + //last_read_state = LAST_OK; + } else { + tfc->timestamp = ltt_time_infinite; + + if(read_ret == ERANGE) { + // last_read_state = LAST_EMPTY; + g_debug("End of trace"); + } else + g_error("Error happened in lttv_process_traceset_middle"); } } } @@ -719,26 +829,49 @@ void lttv_process_traceset_end(LttvTracesetContext *self, event_by_id); } +/* Subtile modification : + * if tracefile has no event at or after the time requested, it is not put in + * the queue, as the next read would fail. + * + * Don't forget to empty the traceset pqueue before calling this. + */ void lttv_process_trace_seek_time(LttvTraceContext *self, LttTime start) { guint i, nb_tracefile; - LttvTracefileContext *tfc; + gint ret; + + LttvTracefileContext **tfc; - GTree *pqueue = self->ts_context->pqueue; + nb_tracefile = self->tracefiles->len; - nb_tracefile = ltt_trace_control_tracefile_number(self->t) + - ltt_trace_per_cpu_tracefile_number(self->t); + GTree *pqueue = self->ts_context->pqueue; for(i = 0 ; i < nb_tracefile ; i++) { - tfc = self->tracefiles[i]; - ltt_tracefile_seek_time(tfc->tf, start); - g_tree_remove(pqueue, tfc); - if(ltt_tracefile_read(tfc->tf, tfc->e) != NULL) { - tfc->timestamp = ltt_event_time(tfc->e); - g_tree_insert(pqueue, tfc, tfc); + tfc = &g_array_index(self->tracefiles, LttvTracefileContext*, i); + + g_tree_remove(pqueue, *tfc); + + ret = ltt_tracefile_seek_time((*tfc)->tf, start); + if(ret == EPERM) g_error("error in lttv_process_trace_seek_time seek"); + + if(ret == 0) { /* not ERANGE especially */ + (*tfc)->timestamp = ltt_event_time(ltt_tracefile_get_event((*tfc)->tf)); + g_assert(ltt_time_compare((*tfc)->timestamp, ltt_time_infinite) != 0); + g_tree_insert(pqueue, (*tfc), (*tfc)); + } else { + (*tfc)->timestamp = ltt_time_infinite; } } +#ifdef DEBUG + test_time.tv_sec = 0; + test_time.tv_nsec = 0; + g_debug("test tree after seek_time"); + g_tree_foreach(pqueue, test_tree, NULL); +#endif //DEBUG + + + } @@ -748,7 +881,8 @@ void lttv_process_traceset_seek_time(LttvTracesetContext *self, LttTime start) LttvTraceContext *tc; - LttvTracefileContext *tfc; + //g_tree_destroy(self->pqueue); + //self->pqueue = g_tree_new(compare_tracefile); nb_trace = lttv_traceset_number(self->ts); for(i = 0 ; i < nb_trace ; i++) { @@ -758,260 +892,359 @@ void lttv_process_traceset_seek_time(LttvTracesetContext *self, LttTime start) } -gboolean lttv_process_tracefile_seek_position(LttvTracefileContext *self, - const LttEventPosition *pos) +gboolean lttv_process_traceset_seek_position(LttvTracesetContext *self, + const LttvTracesetContextPosition *pos) { - LttvTracefileContext *tfc = self; - - LttEvent *event; + guint i; + /* If a position is set, seek the traceset to this position */ + if(ltt_time_compare(pos->timestamp, ltt_time_infinite) != 0) { + + /* Test to see if the traces has been added to the trace set : + * It should NEVER happen. Clear all positions if a new trace comes in. */ + /* FIXME I know this test is not optimal : should keep a number of + * tracefiles variable in the traceset.. eventually */ + guint num_traces = lttv_traceset_number(self->ts); + guint tf_count = 0; + for(i=0; itraces[i]->tracefiles; + guint j; + guint num_tracefiles = tracefiles->len; + for(j=0;jtfcp->len); + + + //g_tree_destroy(self->pqueue); + //self->pqueue = g_tree_new(compare_tracefile); + + for(i=0;itfcp->len; i++) { + LttvTracefileContextPosition *tfcp = + &g_array_index(pos->tfcp, LttvTracefileContextPosition, i); + + g_tree_remove(self->pqueue, tfcp->tfc); + + if(tfcp->used == TRUE) { + if(ltt_tracefile_seek_position(tfcp->tfc->tf, tfcp->event) != 0) + return 1; + tfcp->tfc->timestamp = + ltt_event_time(ltt_tracefile_get_event(tfcp->tfc->tf)); + g_assert(ltt_time_compare(tfcp->tfc->timestamp, + ltt_time_infinite) != 0); + g_tree_insert(self->pqueue, tfcp->tfc, tfcp->tfc); - GTree *pqueue = self->t_context->ts_context->pqueue; - - ltt_tracefile_seek_position(tfc->tf, pos); - g_tree_remove(pqueue, tfc); - if(ltt_tracefile_read(tfc->tf, tfc->e) != NULL) { - tfc->timestamp = ltt_event_time(tfc->e); - g_tree_insert(pqueue, tfc, tfc); + } else { + tfcp->tfc->timestamp = ltt_time_infinite; + } + } } +#ifdef DEBUG + test_time.tv_sec = 0; + test_time.tv_nsec = 0; + g_debug("test tree after seek_position"); + g_tree_foreach(self->pqueue, test_tree, NULL); +#endif //DEBUG -} - -gboolean lttv_process_trace_seek_position(LttvTraceContext *self, - const LttvTraceContextPosition *pos) -{ - guint i, nb_tracefile; - LttvTracefileContext *tfc; + return 0; +} - LttEvent *event; - nb_tracefile = ltt_trace_control_tracefile_number(self->t) + - ltt_trace_per_cpu_tracefile_number(self->t); - if(nb_tracefile != pos->nb_tracefile) - return FALSE; /* Error */ +static LttField * +find_field(LttEventType *et, const GQuark field) +{ + LttField *f; - for(i = 0 ; i < nb_tracefile ; i++) { - tfc = self->tracefiles[i]; - lttv_process_tracefile_seek_position(tfc, pos->tf_pos[i]); + if(field == 0) return NULL; + + f = ltt_eventtype_field_by_name(et, field); + if (!f) { + g_warning("Cannot find field %s in event %s.%s", g_quark_to_string(field), + g_quark_to_string(ltt_facility_name(ltt_eventtype_facility(et))), + g_quark_to_string(ltt_eventtype_name(et))); } - return TRUE; + return f; } - - -gboolean lttv_process_traceset_seek_position(LttvTracesetContext *self, - const LttvTracesetContextPosition *pos) +LttvTraceHookByFacility *lttv_trace_hook_get_fac(LttvTraceHook *th, + guint facility_id) { - guint i, nb_trace; - gboolean sum_ret = TRUE; + return &g_array_index(th->fac_index, LttvTraceHookByFacility, facility_id); +} - LttvTraceContext *tc; +/* Get the first facility corresponding to the name. As the types must be + * compatible, it is relevant to use the field name and sizes of the first + * facility to create data structures and assume the data will be compatible + * thorough the trace */ +LttvTraceHookByFacility *lttv_trace_hook_get_first(LttvTraceHook *th) +{ + g_assert(th->fac_list->len > 0); + return g_array_index(th->fac_list, LttvTraceHookByFacility*, 0); +} - LttvTracefileContext *tfc; - nb_trace = lttv_traceset_number(self->ts); - - if(nb_trace != pos->nb_trace) - return FALSE; /* Error */ +/* Returns 0 on success, -1 if fails. */ +gint +lttv_trace_find_hook(LttTrace *t, GQuark facility, GQuark event, + GQuark field1, GQuark field2, GQuark field3, LttvHook h, gpointer hook_data, + LttvTraceHook *th) +{ + LttFacility *f; - for(i = 0 ; i < nb_trace ; i++) { - tc = self->traces[i]; - sum_ret = sum_ret && lttv_process_trace_seek_position(tc, &pos->t_pos[i]); - } + LttEventType *et, *first_et; - return sum_ret; -} + GArray *facilities; + guint i, fac_id, ev_id; + LttvTraceHookByFacility *thf, *first_thf; -static LttField * -find_field(LttEventType *et, const char *field) -{ - LttType *t; + facilities = ltt_trace_facility_get_by_name(t, facility); - LttField *f; + if(unlikely(facilities == NULL)) goto facility_error; - guint i, nb; + th->fac_index = g_array_sized_new(FALSE, TRUE, + sizeof(LttvTraceHookByFacility), + NUM_FACILITIES); + th->fac_index = g_array_set_size(th->fac_index, NUM_FACILITIES); - char *name; + th->fac_list = g_array_sized_new(FALSE, TRUE, + sizeof(LttvTraceHookByFacility*), + facilities->len); + th->fac_list = g_array_set_size(th->fac_list, facilities->len); + + fac_id = g_array_index(facilities, guint, 0); + f = ltt_trace_get_facility_by_num(t, fac_id); - if(field == NULL) return NULL; + et = ltt_facility_eventtype_get_by_name(f, event); + if(unlikely(et == NULL)) goto event_error; + + thf = &g_array_index(th->fac_index, LttvTraceHookByFacility, fac_id); + g_array_index(th->fac_list, LttvTraceHookByFacility*, 0) = thf; - f = ltt_eventtype_field(et); - t = ltt_eventtype_type(et); - g_assert(ltt_type_class(t) == LTT_STRUCT); - nb = ltt_type_member_number(t); - for(i = 0 ; i < nb ; i++) { - ltt_type_member_type(t, i, &name); - if(strcmp(name, field) == 0) break; + ev_id = ltt_eventtype_id(et); + + thf->h = h; + thf->id = GET_HOOK_ID(fac_id, ev_id); + thf->f1 = find_field(et, field1); + thf->f2 = find_field(et, field2); + thf->f3 = find_field(et, field3); + thf->hook_data = hook_data; + + first_thf = thf; + first_et = et; + + /* Check for type compatibility too */ + for(i=1;ilen;i++) { + fac_id = g_array_index(facilities, guint, i); + f = ltt_trace_get_facility_by_num(t, fac_id); + + et = ltt_facility_eventtype_get_by_name(f, event); + if(unlikely(et == NULL)) goto event_error; + + thf = &g_array_index(th->fac_index, LttvTraceHookByFacility, fac_id); + g_array_index(th->fac_list, LttvTraceHookByFacility*, i) = thf; + ev_id = ltt_eventtype_id(et); + thf->h = h; + thf->id = GET_HOOK_ID(fac_id, ev_id); + thf->f1 = find_field(et, field1); + if(check_fields_compatibility(first_et, et, + first_thf->f1, thf->f1)) + goto type_error; + + thf->f2 = find_field(et, field2); + if(check_fields_compatibility(first_et, et, + first_thf->f2, thf->f2)) + goto type_error; + + thf->f3 = find_field(et, field3); + if(check_fields_compatibility(first_et, et, + first_thf->f3, thf->f3)) + goto type_error; + thf->hook_data = hook_data; } - g_assert(i < nb); - return ltt_field_member(f, i); -} - - -void -lttv_trace_find_hook(LttTrace *t, char *facility, char *event_type, - char *field1, char *field2, char *field3, LttvHook h, LttvTraceHook *th) -{ - LttFacility *f; - LttEventType *et; + return 0; - guint nb, pos, i; +type_error: + goto free; +event_error: + g_error("Event type does not exist for event %s", + g_quark_to_string(event)); + goto free; +facility_error: + //Ignore this type of error : some facilities are not required. + //g_error("No %s facility", g_quark_to_string(facility)); + return -1; +free: + g_array_free(th->fac_index, TRUE); + g_array_free(th->fac_list, TRUE); + th->fac_index = NULL; + th->fac_list = NULL; + return -1; +} - char *name; +void lttv_trace_hook_destroy(LttvTraceHook *th) +{ + g_array_free(th->fac_index, TRUE); + g_array_free(th->fac_list, TRUE); +} - nb = ltt_trace_facility_find(t, facility, &pos); - if(nb < 1) g_error("No %s facility", facility); - f = ltt_trace_facility_get(t, pos); - et = ltt_facility_eventtype_get_by_name(f, event_type); - if(et == NULL) g_error("Event %s does not exist", event_type); - th->h = h; - th->id = ltt_eventtype_id(et); - th->f1 = find_field(et, field1); - th->f2 = find_field(et, field2); - th->f3 = find_field(et, field3); -} -LttvTracesetContextPosition *lttv_traceset_context_position_new() +LttvTracesetContextPosition *lttv_traceset_context_position_new( + const LttvTracesetContext *self) { - return g_new(LttvTracesetContextPosition,1); -} + guint num_traces = lttv_traceset_number(self->ts); + guint tf_count = 0; + guint i; + + for(i=0; itraces[i]->tracefiles; + guint j; + guint num_tracefiles = tracefiles->len; + for(j=0;jtfcp = g_array_sized_new(FALSE, TRUE, + sizeof(LttvTracefileContextPosition), + tf_count); + g_array_set_size(pos->tfcp, tf_count); + for(i=0;itfcp->len;i++) { + LttvTracefileContextPosition *tfcp = + &g_array_index(pos->tfcp, LttvTracefileContextPosition, i); + tfcp->event = ltt_event_position_new(); + } + pos->timestamp = ltt_time_infinite; + return pos; +} +/* Save all positions, the ones with infinite time will have NULL + * ep. */ +/* note : a position must be destroyed when a trace is added/removed from a + * traceset */ void lttv_traceset_context_position_save(const LttvTracesetContext *self, LttvTracesetContextPosition *pos) { - guint nb_trace, nb_tracefile; - guint iter_trace, iter_tracefile; - - LttvTraceContext *tc; + guint i; + guint num_traces = lttv_traceset_number(self->ts); + guint tf_count = 0; - LttvTracefileContext *tfc; - - LttEvent *event; - - LttTime timestamp = self->time_span.end_time; - - pos->nb_trace = nb_trace = lttv_traceset_number(self->ts); - pos->t_pos = g_new(LttvTraceContextPosition, nb_trace); + pos->timestamp = ltt_time_infinite; - for(iter_trace = 0 ; iter_trace < nb_trace ; iter_trace++) { - tc = self->traces[iter_trace]; - pos->t_pos[iter_trace].nb_tracefile = nb_tracefile = - ltt_trace_control_tracefile_number(tc->t) + - ltt_trace_per_cpu_tracefile_number(tc->t); - - pos->t_pos[iter_trace].tf_pos = g_new(LttEventPosition*, nb_tracefile); - for(iter_tracefile = 0; iter_tracefile < nb_tracefile; iter_tracefile++) { - tfc = tc->tracefiles[iter_tracefile]; - event = tfc->e; - if(event!=NULL) { - pos->t_pos[iter_trace].tf_pos[iter_tracefile] - = ltt_event_position_new(); - ltt_event_position(event, - pos->t_pos[iter_trace].tf_pos[iter_tracefile]); + for(i=0; itraces[i]->tracefiles; + guint j; + guint num_tracefiles = tracefiles->len; + + for(j=0;jtfcp->len); + LttvTracefileContext **tfc = &g_array_index(tracefiles, + LttvTracefileContext*, j); + LttvTracefileContextPosition *tfcp = + &g_array_index(pos->tfcp, LttvTracefileContextPosition, tf_count); + + tfcp->tfc = *tfc; + + if(ltt_time_compare((*tfc)->timestamp, ltt_time_infinite) != 0) { + LttEvent *event = ltt_tracefile_get_event((*tfc)->tf); + ltt_event_position(event, tfcp->event); + if(ltt_time_compare((*tfc)->timestamp, pos->timestamp) < 0) + pos->timestamp = (*tfc)->timestamp; + tfcp->used = TRUE; } else { - pos->t_pos[iter_trace].tf_pos[iter_tracefile] = NULL; + tfcp->used = FALSE; } - if(ltt_time_compare(tfc->timestamp, timestamp) < 0) - timestamp = tfc->timestamp; + + //g_array_append_val(pos->tfc, *tfc); + //g_array_append_val(pos->ep, ep); + tf_count++; } + } - pos->timestamp = timestamp; } void lttv_traceset_context_position_destroy(LttvTracesetContextPosition *pos) { - guint nb_trace, nb_tracefile; - guint iter_trace, iter_tracefile; - - nb_trace = pos->nb_trace; + int i; - for(iter_trace = 0 ; iter_trace < nb_trace ; iter_trace++) { - for(iter_tracefile = 0; iter_tracefile < - pos->t_pos[iter_trace].nb_tracefile; - iter_tracefile++) { - if(pos->t_pos[iter_trace].tf_pos[iter_tracefile] != NULL) - g_free(pos->t_pos[iter_trace].tf_pos[iter_tracefile]); - } - g_free(pos->t_pos[iter_trace].tf_pos); + for(i=0;itfcp->len;i++) { + LttvTracefileContextPosition *tfcp = + &g_array_index(pos->tfcp, LttvTracefileContextPosition, i); + g_free(tfcp->event); + tfcp->event = NULL; + tfcp->used = FALSE; } - g_free(pos->t_pos); - + g_array_free(pos->tfcp, TRUE); + g_free(pos); } void lttv_traceset_context_position_copy(LttvTracesetContextPosition *dest, const LttvTracesetContextPosition *src) { - guint nb_trace, nb_tracefile; - guint iter_trace, iter_tracefile; + int i; + LttvTracefileContextPosition *src_tfcp, *dest_tfcp; - nb_trace = dest->nb_trace = src->nb_trace; - dest->t_pos = g_new(LttvTraceContextPosition, nb_trace); - - for(iter_trace = 0 ; iter_trace < nb_trace ; iter_trace++) { - - nb_tracefile = dest->t_pos[iter_trace].nb_tracefile = - src->t_pos[iter_trace].nb_tracefile; - - for(iter_tracefile = 0; iter_tracefile < nb_tracefile; iter_tracefile++) { - dest->t_pos[iter_trace].tf_pos[iter_tracefile] = - ltt_event_position_new(); - if(src->t_pos[iter_trace].tf_pos[iter_tracefile] != NULL) - ltt_event_position_copy( - dest->t_pos[iter_trace].tf_pos[iter_tracefile], - src->t_pos[iter_trace].tf_pos[iter_tracefile]); - else - dest->t_pos[iter_trace].tf_pos[iter_tracefile] = NULL; + g_assert(src->tfcp->len == src->tfcp->len); + + for(i=0;itfcp->len;i++) { + src_tfcp = + &g_array_index(src->tfcp, LttvTracefileContextPosition, i); + dest_tfcp = + &g_array_index(dest->tfcp, LttvTracefileContextPosition, i); + + dest_tfcp->used = src_tfcp->used; + dest_tfcp->tfc = src_tfcp->tfc; + + if(src_tfcp->used) { + ltt_event_position_copy( + dest_tfcp->event, + src_tfcp->event); } } - dest->timestamp = src->timestamp; } gint lttv_traceset_context_ctx_pos_compare(const LttvTracesetContext *self, const LttvTracesetContextPosition *pos) { - guint nb_trace, nb_tracefile; - guint iter_trace, iter_tracefile; - gint ret; - - LttvTraceContext *tc; + int i; + int ret = 0; - LttvTracefileContext *tfc; - - LttEvent *event; - - nb_trace = lttv_traceset_number(self->ts); - - if(pos->nb_trace != nb_trace) - g_error("lttv_traceset_context_ctx_pos_compare : nb_trace does not match."); + if(pos->tfcp->len == 0) { + if(lttv_traceset_number(self->ts) == 0) return 0; + else return 1; + } + if(lttv_traceset_number(self->ts) == 0) + return -1; - for(iter_trace = 0 ; iter_trace < nb_trace ; iter_trace++) { - tc = self->traces[iter_trace]; - nb_tracefile = ltt_trace_control_tracefile_number(tc->t) + - ltt_trace_per_cpu_tracefile_number(tc->t); - - if(pos->t_pos[iter_trace].nb_tracefile != nb_tracefile) - g_error("lttv_traceset_context_ctx_pos_compare : nb_tracefile does not match."); - - for(iter_tracefile = 0; iter_tracefile < nb_tracefile; iter_tracefile++) { - tfc = tc->tracefiles[iter_tracefile]; - event = tfc->e; - if( - ret = - ltt_event_event_position_compare(event, - pos->t_pos[iter_trace].tf_pos[iter_tracefile]) - != 0) - return ret; + for(i=0;itfcp->len;i++) { + LttvTracefileContextPosition *tfcp = + &g_array_index(pos->tfcp, LttvTracefileContextPosition, i); + + if(tfcp->used == FALSE) { + if(ltt_time_compare(tfcp->tfc->timestamp, ltt_time_infinite) < 0) { + ret = -1; + } + } else { + if(ltt_time_compare(tfcp->tfc->timestamp, ltt_time_infinite) == 0) { + ret = 1; + } else { + LttEvent *event = ltt_tracefile_get_event(tfcp->tfc->tf); + + ret = ltt_event_position_compare((LttEventPosition*)event, + tfcp->event); + } } + if(ret != 0) return ret; + } return 0; } @@ -1021,28 +1254,46 @@ gint lttv_traceset_context_pos_pos_compare( const LttvTracesetContextPosition *pos1, const LttvTracesetContextPosition *pos2) { - guint nb_trace, nb_tracefile; - guint iter_trace, iter_tracefile; + int i, j; + int ret = 0; - gint ret; - - nb_trace = pos1->nb_trace; - if(nb_trace != pos2->nb_trace) - g_error("lttv_traceset_context_pos_pos_compare : nb_trace does not match."); - - for(iter_trace = 0 ; iter_trace < nb_trace ; iter_trace++) { + if(ltt_time_compare(pos1->timestamp, ltt_time_infinite) == 0) { + if(ltt_time_compare(pos2->timestamp, ltt_time_infinite) == 0) + return 0; + else + return 1; + } + if(ltt_time_compare(pos2->timestamp, ltt_time_infinite) == 0) + return -1; + + for(i=0;itfcp->len;i++) { + LttvTracefileContextPosition *tfcp1 = + &g_array_index(pos1->tfcp, LttvTracefileContextPosition, i); + + if(tfcp1->used == TRUE) { + for(j=0;jtfcp->len;j++) { + LttvTracefileContextPosition *tfcp2 = + &g_array_index(pos2->tfcp, LttvTracefileContextPosition, j); + + if(tfcp1->tfc == tfcp2->tfc) { + if(tfcp2->used == TRUE) + ret = ltt_event_position_compare(tfcp1->event, tfcp2->event); + else + ret = -1; + + if(ret != 0) return ret; + } + } - nb_tracefile = pos1->t_pos[iter_trace].nb_tracefile; - if(nb_tracefile != pos2->t_pos[iter_trace].nb_tracefile) - g_error("lttv_traceset_context_ctx_pos_compare : nb_tracefile does not match."); + } else { + for(j=0;jtfcp->len;j++) { + LttvTracefileContextPosition *tfcp2 = + &g_array_index(pos2->tfcp, LttvTracefileContextPosition, j); - for(iter_tracefile = 0; iter_tracefile < nb_tracefile; iter_tracefile++) { - if(ret = - ltt_event_position_compare( - pos1->t_pos[iter_trace].tf_pos[iter_tracefile], - pos2->t_pos[iter_trace].tf_pos[iter_tracefile]) - != 0) - return ret; + if(tfcp1->tfc == tfcp2->tfc) + if(tfcp2->used == TRUE) ret = 1; + if(ret != 0) return ret; + } } } return 0; @@ -1065,3 +1316,362 @@ LttvTracefileContext *lttv_traceset_context_get_current_tfc(LttvTracesetContext return tfc; } + +/* lttv_process_traceset_synchronize_tracefiles + * + * Use the sync_position field of the trace set context to synchronize each + * tracefile with the previously saved position. + * + * If no previous position has been saved, it simply does nothing. + */ +void lttv_process_traceset_synchronize_tracefiles(LttvTracesetContext *tsc) +{ + g_assert(lttv_process_traceset_seek_position(tsc, tsc->sync_position) == 0); +} + + + + +void lttv_process_traceset_get_sync_data(LttvTracesetContext *tsc) +{ + lttv_traceset_context_position_save(tsc, tsc->sync_position); +} + +struct seek_back_data { + guint first_event; /* Index of the first event in the array : we will always + overwrite at this position : this is a circular array. + */ + guint events_found; + guint n; /* number of events requested */ + GPtrArray *array; /* array of LttvTracesetContextPositions pointers */ + LttvFilter *filter1; + LttvFilter *filter2; + LttvFilter *filter3; + gpointer data; + check_handler *check; + gboolean *stop_flag; + guint raw_event_count; +}; + +static gint seek_back_event_hook(void *hook_data, void* call_data) +{ + struct seek_back_data *sd = (struct seek_back_data*)hook_data; + LttvTracefileContext *tfc = (LttvTracefileContext*)call_data; + LttvTracesetContext *tsc = tfc->t_context->ts_context; + LttvTracesetContextPosition *pos; + + if(sd->check && sd->check(sd->raw_event_count, sd->stop_flag, sd->data)) + return TRUE; + sd->raw_event_count++; + + if(sd->filter1 != NULL && sd->filter1->head != NULL && + !lttv_filter_tree_parse(sd->filter1->head, + ltt_tracefile_get_event(tfc->tf), + tfc->tf, + tfc->t_context->t, + tfc,NULL,NULL)) { + return FALSE; + } + if(sd->filter2 != NULL && sd->filter2->head != NULL && + !lttv_filter_tree_parse(sd->filter2->head, + ltt_tracefile_get_event(tfc->tf), + tfc->tf, + tfc->t_context->t, + tfc,NULL,NULL)) { + return FALSE; + } + if(sd->filter3 != NULL && sd->filter3->head != NULL && + !lttv_filter_tree_parse(sd->filter3->head, + ltt_tracefile_get_event(tfc->tf), + tfc->tf, + tfc->t_context->t, + tfc,NULL,NULL)) { + return FALSE; + } + + pos = (LttvTracesetContextPosition*)g_ptr_array_index (sd->array, + sd->first_event); + + lttv_traceset_context_position_save(tsc, pos); + + if(sd->first_event >= sd->array->len - 1) sd->first_event = 0; + else sd->first_event++; + + sd->events_found = min(sd->n, sd->events_found + 1); + + return FALSE; +} + +/* Seek back n events back from the current position. + * + * Parameters : + * @self The trace set context + * @n number of events to jump over + * @first_offset The initial offset value used. + * never put first_offset at ltt_time_zero. + * @time_seeker Function pointer of the function to use to seek time : + * either lttv_process_traceset_seek_time + * or lttv_state_traceset_seek_time_closest + * @filter The filter to call. + * + * Return value : the number of events found (might be lower than the number + * requested if beginning of traceset is reached). + * + * The first search will go back first_offset and try to find the last n events + * matching the filter. If there are not enough, it will try to go back from the + * new trace point from first_offset*2, and so on, until beginning of trace or n + * events are found. + * + * Note : this function does not take in account the LttvFilter : use the + * similar function found in state.c instead. + * + * Note2 : the caller must make sure that the LttvTracesetContext does not + * contain any hook, as process_traceset_middle is used in this routine. + */ +guint lttv_process_traceset_seek_n_backward(LttvTracesetContext *self, + guint n, LttTime first_offset, + seek_time_fct time_seeker, + check_handler *check, + gboolean *stop_flag, + LttvFilter *filter1, + LttvFilter *filter2, + LttvFilter *filter3, + gpointer data) +{ + if(lttv_traceset_number(self->ts) == 0) return 0; + g_assert(ltt_time_compare(first_offset, ltt_time_zero) != 0); + + guint i; + LttvTracesetContextPosition *next_iter_end_pos = + lttv_traceset_context_position_new(self); + LttvTracesetContextPosition *end_pos = + lttv_traceset_context_position_new(self); + LttvTracesetContextPosition *saved_pos = + lttv_traceset_context_position_new(self); + LttTime time; + LttTime asked_time; + LttTime time_offset; + struct seek_back_data sd; + LttvHooks *hooks = lttv_hooks_new(); + + sd.first_event = 0; + sd.events_found = 0; + sd.array = g_ptr_array_sized_new(n); + sd.filter1 = filter1; + sd.filter2 = filter2; + sd.filter3 = filter3; + sd.data = data; + sd.n = n; + sd.check = check; + sd.stop_flag = stop_flag; + sd.raw_event_count = 0; + g_ptr_array_set_size(sd.array, n); + for(i=0;itime_span.end_time) > 0) { + time = self->time_span.end_time; + } + asked_time = time; + time_offset = first_offset; + + lttv_hooks_add(hooks, seek_back_event_hook, &sd, LTTV_PRIO_DEFAULT); + + lttv_process_traceset_begin(self, NULL, NULL, NULL, hooks, NULL); + + while(1) { + /* stop criteria : - n events found + * - asked_time < beginning of trace */ + if(ltt_time_compare(asked_time, self->time_span.start_time) < 0) break; + + lttv_traceset_context_position_copy(end_pos, next_iter_end_pos); + + /* We must seek the traceset back to time - time_offset */ + /* this time becomes the new reference time */ + time = ltt_time_sub(time, time_offset); + asked_time = time; + + time_seeker(self, time); + lttv_traceset_context_position_save(self, next_iter_end_pos); + /* Resync the time in case of a seek_closest */ + time = lttv_traceset_context_position_get_time(next_iter_end_pos); + if(ltt_time_compare(time, self->time_span.end_time) > 0) { + time = self->time_span.end_time; + } + + /* Process the traceset, calling a hook which adds events + * to the array, overwriting the tail. It changes first_event and + * events_found too. */ + /* We would like to have a clean context here : no other hook than our's */ + + lttv_process_traceset_middle(self, ltt_time_infinite, + G_MAXUINT, end_pos); + + if(sd.events_found < n) { + if(sd.first_event > 0) { + /* Save the first position */ + LttvTracesetContextPosition *pos = + (LttvTracesetContextPosition*)g_ptr_array_index (sd.array, 0); + lttv_traceset_context_position_copy(saved_pos, pos); + } + g_assert(n-sd.events_found <= sd.array->len); + /* Change array size to n - events_found */ + for(i=n-sd.events_found;ilen;i++) { + LttvTracesetContextPosition *pos = + (LttvTracesetContextPosition*)g_ptr_array_index (sd.array, i); + lttv_traceset_context_position_destroy(pos); + } + g_ptr_array_set_size(sd.array, n-sd.events_found); + sd.first_event = 0; + + } else break; /* Second end criterion : n events found */ + + time_offset = ltt_time_mul(time_offset, BACKWARD_SEEK_MUL); + } + + lttv_traceset_context_position_destroy(end_pos); + lttv_traceset_context_position_destroy(next_iter_end_pos); + + lttv_process_traceset_end(self, NULL, NULL, NULL, hooks, NULL); + + if(sd.events_found >= n) { + /* Seek the traceset to the first event in the circular array */ + LttvTracesetContextPosition *pos = + (LttvTracesetContextPosition*)g_ptr_array_index (sd.array, + sd.first_event); + g_assert(lttv_process_traceset_seek_position(self, pos) == 0); + } else { + /* Will seek to the last saved position : in the worst case, it will be the + * original position (if events_found is 0) */ + g_assert(lttv_process_traceset_seek_position(self, saved_pos) == 0); + } + + for(i=0;ilen;i++) { + LttvTracesetContextPosition *pos = + (LttvTracesetContextPosition*)g_ptr_array_index (sd.array, i); + lttv_traceset_context_position_destroy(pos); + } + g_ptr_array_free(sd.array, TRUE); + + lttv_hooks_destroy(hooks); + + lttv_traceset_context_position_destroy(saved_pos); + + return sd.events_found; +} + + +struct seek_forward_data { + guint event_count; /* event counter */ + guint n; /* requested number of events to jump over */ + LttvFilter *filter1; + LttvFilter *filter2; + LttvFilter *filter3; + gpointer data; + check_handler *check; + gboolean *stop_flag; + guint raw_event_count; /* event counter */ +}; + +static gint seek_forward_event_hook(void *hook_data, void* call_data) +{ + struct seek_forward_data *sd = (struct seek_forward_data*)hook_data; + LttvTracefileContext *tfc = (LttvTracefileContext*)call_data; + + if(sd->check && sd->check(sd->raw_event_count, sd->stop_flag, sd->data)) + return TRUE; + sd->raw_event_count++; + + if(sd->filter1 != NULL && sd->filter1->head != NULL && + !lttv_filter_tree_parse(sd->filter1->head, + ltt_tracefile_get_event(tfc->tf), + tfc->tf, + tfc->t_context->t, + tfc,NULL,NULL)) { + return FALSE; + } + if(sd->filter2 != NULL && sd->filter2->head != NULL && + !lttv_filter_tree_parse(sd->filter2->head, + ltt_tracefile_get_event(tfc->tf), + tfc->tf, + tfc->t_context->t, + tfc,NULL,NULL)) { + return FALSE; + } + if(sd->filter3 != NULL && sd->filter3->head != NULL && + !lttv_filter_tree_parse(sd->filter3->head, + ltt_tracefile_get_event(tfc->tf), + tfc->tf, + tfc->t_context->t, + tfc,NULL,NULL)) { + return FALSE; + } + + sd->event_count++; + if(sd->event_count >= sd->n) + return TRUE; +} + +/* Seek back n events forward from the current position (1 to n) + * 0 is ok too, but it will actually do nothing. + * + * Parameters : + * @self the trace set context + * @n number of events to jump over + * @filter filter to call. + * + * returns : the number of events jumped over (may be less than requested if end + * of traceset reached) */ +guint lttv_process_traceset_seek_n_forward(LttvTracesetContext *self, + guint n, + check_handler *check, + gboolean *stop_flag, + LttvFilter *filter1, + LttvFilter *filter2, + LttvFilter *filter3, + gpointer data) +{ + struct seek_forward_data sd; + sd.event_count = 0; + sd.n = n; + sd.filter1 = filter1; + sd.filter2 = filter2; + sd.filter3 = filter3; + sd.data = data; + sd.check = check; + sd.stop_flag = stop_flag; + sd.raw_event_count = 0; + + if(sd.event_count >= sd.n) return sd.event_count; + + LttvHooks *hooks = lttv_hooks_new(); + + lttv_hooks_add(hooks, seek_forward_event_hook, &sd, LTTV_PRIO_DEFAULT); + + lttv_process_traceset_begin(self, NULL, NULL, NULL, hooks, NULL); + + /* it will end on the end of traceset, or the fact that the + * hook returns TRUE. + */ + lttv_process_traceset_middle(self, ltt_time_infinite, + G_MAXUINT, NULL); + + /* Here, our position is either the end of traceset, or the exact position + * after n events : leave it like this. This might be placed on an event that + * will be filtered out, we don't care : all we know is that the following + * event filtered in will be the right one. */ + + lttv_process_traceset_end(self, NULL, NULL, NULL, hooks, NULL); + + lttv_hooks_destroy(hooks); + + return sd.event_count; +} + +