continue implementation of resourceview
[lttv.git] / ltt / branches / poly / lttv / lttv / state.c
index 914ab728b86cc032185a0d4464568b933a0fc03d..ff388014da07c0e7a28bfd7399f5b24702d0b279 100644 (file)
@@ -47,9 +47,8 @@
 GQuark
     LTT_FACILITY_KERNEL,
     LTT_FACILITY_KERNEL_ARCH,
-    LTT_FACILITY_PROCESS,
+    LTT_FACILITY_LIST,
     LTT_FACILITY_FS,
-    LTT_FACILITY_STATEDUMP,
     LTT_FACILITY_USER_GENERIC;
 
 /* Events Quarks */
@@ -63,13 +62,14 @@ GQuark
     LTT_EVENT_IRQ_EXIT,
     LTT_EVENT_SOFT_IRQ_ENTRY,
     LTT_EVENT_SOFT_IRQ_EXIT,
-    LTT_EVENT_SCHEDCHANGE,
-    LTT_EVENT_FORK,
-    LTT_EVENT_KERNEL_THREAD,
-    LTT_EVENT_EXIT,
-    LTT_EVENT_FREE,
+    LTT_EVENT_SCHED_SCHEDULE,
+    LTT_EVENT_PROCESS_FORK,
+    LTT_EVENT_KTHREAD_CREATE,
+    LTT_EVENT_PROCESS_EXIT,
+    LTT_EVENT_PROCESS_FREE,
     LTT_EVENT_EXEC,
-    LTT_EVENT_ENUM_PROCESS_STATE,
+    LTT_EVENT_PROCESS_STATE,
+    LTT_EVENT_STATEDUMP_END,
     LTT_EVENT_FUNCTION_ENTRY,
     LTT_EVENT_FUNCTION_EXIT,
     LTT_EVENT_THREAD_BRAND;
@@ -81,13 +81,14 @@ GQuark
     LTT_FIELD_TRAP_ID,
     LTT_FIELD_IRQ_ID,
     LTT_FIELD_SOFT_IRQ_ID,
-    LTT_FIELD_OUT,
-    LTT_FIELD_IN,
-    LTT_FIELD_OUT_STATE,
+    LTT_FIELD_PREV_PID,
+    LTT_FIELD_NEXT_PID,
+    LTT_FIELD_PREV_STATE,
     LTT_FIELD_PARENT_PID,
     LTT_FIELD_CHILD_PID,
     LTT_FIELD_PID,
     LTT_FIELD_TGID,
+    LTT_FIELD_CHILD_TGID,
     LTT_FIELD_FILENAME,
     LTT_FIELD_NAME,
     LTT_FIELD_TYPE,
@@ -111,7 +112,6 @@ LttvExecutionSubmode
 
 LttvProcessStatus
   LTTV_STATE_UNNAMED,
-  LTTV_STATE_UNBRANDED,
   LTTV_STATE_WAIT_FORK,
   LTTV_STATE_WAIT_CPU,
   LTTV_STATE_EXIT,
@@ -120,10 +120,18 @@ LttvProcessStatus
   LTTV_STATE_RUN,
   LTTV_STATE_DEAD;
 
+GQuark
+  LTTV_STATE_UNBRANDED;
+
 LttvProcessType
   LTTV_STATE_USER_THREAD,
   LTTV_STATE_KERNEL_THREAD;
 
+LttvCPUMode
+  LTTV_CPU_UNKNOWN,
+  LTTV_CPU_IDLE,
+  LTTV_CPU_BUSY;
+
 static GQuark
   LTTV_STATE_TRACEFILES,
   LTTV_STATE_PROCESSES,
@@ -254,8 +262,9 @@ restore_init_state(LttvTraceState *self)
       &g_array_index(self->running_process[i]->execution_stack,
         LttvExecutionState, 0);
     es->t = LTTV_STATE_MODE_UNKNOWN;
+    es->s = LTTV_STATE_UNNAMED;
 
-    self->running_process[i]->state->s = LTTV_STATE_RUN;
+    //self->running_process[i]->state->s = LTTV_STATE_RUN;
     self->running_process[i]->cpu = i;
   }
   
@@ -342,6 +351,7 @@ state_load_saved_states(LttvTraceState *tcs)
   } while(1);
 
   fclose(fp);
+
   // saved_states : open, test
   strncpy(path, trace_path, PATH_MAX-1);
   count = strnlen(trace_path, PATH_MAX-1);
@@ -405,6 +415,8 @@ init(LttvTracesetState *self, LttvTraceset *ts)
     tcs->usertraces = NULL;
     tcs->running_process = g_new(LttvProcessState*, 
                                  ltt_trace_get_num_cpu(tc->t));
+    tcs->cpu_states = g_new(LttvCPUState, 
+                                 ltt_trace_get_num_cpu(tc->t));
     restore_init_state(tcs);
     for(j = 0 ; j < nb_tracefile ; j++) {
       tfcs = 
@@ -412,6 +424,7 @@ init(LttvTracesetState *self, LttvTraceset *ts)
                                           LttvTracefileContext*, j));
       tfcs->tracefile_name = ltt_tracefile_name(tfcs->parent.tf);
       tfcs->cpu = ltt_tracefile_cpu(tfcs->parent.tf);
+      tfcs->cpu_state = &(tcs->cpu_states[tfcs->cpu]);
       if(ltt_tracefile_tid(tfcs->parent.tf) != 0) {
         /* It's a Usertrace */
         guint tid = ltt_tracefile_tid(tfcs->parent.tf);
@@ -782,8 +795,13 @@ static void read_process_state_raw(LttvTraceState *self, FILE *fp,
     /* We must link to the parent */
     parent_process = lttv_state_find_process_or_create(self, ANY_CPU, tmp.ppid,
         &ltt_time_zero);
-    process = lttv_state_find_process_or_create(self, tmp.cpu, tmp.pid,
-        &tmp.creation_time);
+    process = lttv_state_find_process(self, ANY_CPU, tmp.pid);
+    if(process == NULL) {
+      process = lttv_state_create_process(self, parent_process, tmp.cpu,
+      tmp.pid, tmp.tgid,
+      g_quark_from_string((gchar*)g_ptr_array_index(quarktable, tmp.name)),
+          &tmp.creation_time);
+    }
   }
   process->insertion_time = tmp.insertion_time;
   process->creation_time = tmp.creation_time;
@@ -796,6 +814,7 @@ static void read_process_state_raw(LttvTraceState *self, FILE *fp,
   process->name = 
     g_quark_from_string((gchar*)g_ptr_array_index(quarktable, tmp.name));
 
+
   do {
     if(feof(fp) || ferror(fp)) goto end_loop;
 
@@ -809,6 +828,7 @@ static void read_process_state_raw(LttvTraceState *self, FILE *fp,
                            process->execution_stack->len + 1);
         es = &g_array_index(process->execution_stack, LttvExecutionState,
                 process->execution_stack->len-1);
+        process->state = es;
 
         fread(&es->t, sizeof(es->t), 1, fp);
         es->t = g_quark_from_string(
@@ -864,6 +884,7 @@ void lttv_state_read_raw(LttvTraceState *self, FILE *fp, GPtrArray *quarktable)
   LttvAttribute *saved_states_tree, *saved_state_tree;
 
   LttvAttributeValue value;
+  GTree *pqueue = self->parent.ts_context->pqueue;
   ep = ltt_event_position_new();
   
   restore_init_state(self);
@@ -920,6 +941,7 @@ end_loop:
   //  fprintf(fp, "  <TRACEFILE TIMESTAMP_S=%lu TIMESTAMP_NS=%lu", 
   //      tfcs->parent.timestamp.tv_sec, 
   //      tfcs->parent.timestamp.tv_nsec);
+    g_tree_remove(pqueue, &tfcs->parent);
     hdr = fgetc(fp);
     g_assert(hdr == HDR_TRACEFILE);
     fread(&tfcs->parent.timestamp, sizeof(tfcs->parent.timestamp), 1, fp);
@@ -932,6 +954,7 @@ end_loop:
       ltt_event_position_set(ep, tfcs->parent.tf, nb_block, offset, tsc);
       gint ret = ltt_tracefile_seek_position(tfcs->parent.tf, ep);
       g_assert(ret == 0);
+      g_tree_insert(pqueue, &tfcs->parent, &tfcs->parent);
     }
   }
   g_free(ep);
@@ -949,6 +972,7 @@ end_loop:
     t.tv_nsec);
 
   *(self->max_time_state_recomputed_in_seek) = t;
+
 }
 
 /* Called when a HDR_TRACE is found */
@@ -987,8 +1011,10 @@ void lttv_trace_states_read_raw(LttvTraceState *tcs, FILE *fp,
     };
   } while(1);
 end_loop:
-
   *(tcs->max_time_state_recomputed_in_seek) = tcs->parent.time_span.end_time;
+  restore_init_state(tcs);
+  lttv_process_trace_seek_time(tcs, ltt_time_zero);
+  return;
 }
 
 
@@ -1340,7 +1366,9 @@ typedef struct _LttvNameTables {
   GQuark *trap_names;
   guint nb_traps;
   GQuark *irq_names;
+  guint nb_irqs;
   GQuark *soft_irq_names;
+  guint nb_softirqs;
 } LttvNameTables;
 
 
@@ -1398,6 +1426,12 @@ create_name_tables(LttvTraceState *tcs)
 
     for(i = 0 ; i < nb ; i++) {
       name_tables->syscall_names[i] = ltt_enum_string_get(t, i);
+      if(!name_tables->syscall_names[i]) {
+        GString *string = g_string_new("");
+        g_string_printf(string, "syscall %u", i);
+        name_tables->syscall_names[i] = g_quark_from_string(string->str);
+        g_string_free(string, TRUE);
+      }
     }
 
     //name_tables->syscall_names = g_new(GQuark, 256);
@@ -1410,7 +1444,7 @@ create_name_tables(LttvTraceState *tcs)
     name_tables->nb_syscalls = 0;
   }
 
-  if(!lttv_trace_find_hook(tcs->parent.t, LTT_FACILITY_KERNEL,
+  if(!lttv_trace_find_hook(tcs->parent.t, LTT_FACILITY_KERNEL_ARCH,
         LTT_EVENT_TRAP_ENTRY,
         LTT_FIELD_TRAP_ID, 0, 0,
         NULL, NULL, &h)) {
@@ -1459,12 +1493,14 @@ create_name_tables(LttvTraceState *tcs)
     }
     */
 
+    name_tables->nb_irqs = 256;
     name_tables->irq_names = g_new(GQuark, 256);
     for(i = 0 ; i < 256 ; i++) {
       g_string_printf(fe_name, "irq %d", i);
       name_tables->irq_names[i] = g_quark_from_string(fe_name->str);
     }
   } else {
+    name_tables->nb_irqs = 0;
     name_tables->irq_names = NULL;
   }
   /*
@@ -1474,6 +1510,7 @@ create_name_tables(LttvTraceState *tcs)
   }
   */
 
+  name_tables->nb_softirqs = 256;
   name_tables->soft_irq_names = g_new(GQuark, 256);
   for(i = 0 ; i < 256 ; i++) {
     g_string_printf(fe_name, "softirq %d", i);
@@ -1503,6 +1540,8 @@ get_name_tables(LttvTraceState *tcs)
   tcs->nb_traps = name_tables->nb_traps;
   tcs->irq_names = name_tables->irq_names;
   tcs->soft_irq_names = name_tables->soft_irq_names;
+  tcs->nb_irqs = name_tables->nb_irqs;
+  tcs->nb_softirqs = name_tables->nb_softirqs;
 }
 
 
@@ -1788,8 +1827,12 @@ lttv_state_find_process_or_create(LttvTraceState *ts, guint cpu, guint pid,
                 NULL, cpu, pid, 0, LTTV_STATE_UNNAMED, timestamp);
     /* We are not sure is it's a kernel thread or normal thread, put the
       * bottom stack state to unknown */
-    es = &g_array_index(process->execution_stack, LttvExecutionState, 0);
+    process->execution_stack = 
+      g_array_set_size(process->execution_stack, 1);
+    process->state = es =
+      &g_array_index(process->execution_stack, LttvExecutionState, 0);
     es->t = LTTV_STATE_MODE_UNKNOWN;
+    es->s = LTTV_STATE_UNNAMED;
   }
   return process;
 }
@@ -1925,9 +1968,19 @@ static gboolean irq_entry(void *hook_data, void *call_data)
   LttField *f = thf->f1;
 
   LttvExecutionSubmode submode;
+  guint64 irq = ltt_event_get_long_unsigned(e, f);
+  guint64 nb_irqs = ((LttvTraceState *)(s->parent.t_context))->nb_irqs;
+  GString *string;
 
-  submode = ((LttvTraceState *)(s->parent.t_context))->irq_names[
-      ltt_event_get_unsigned(e, f)];
+  if(irq < nb_irqs) {
+    submode = ((LttvTraceState *)(s->parent.t_context))->irq_names[irq];
+  } else {
+    /* Fixup an incomplete irq table */
+    GString *string = g_string_new("");
+    g_string_printf(string, "irq %llu", irq);
+    submode = g_quark_from_string(string->str);
+    g_string_free(string, TRUE);
+  }
 
   /* Do something with the info about being in user or system mode when int? */
   push_state(s, LTTV_STATE_IRQ, submode);
@@ -1965,9 +2018,19 @@ static gboolean soft_irq_entry(void *hook_data, void *call_data)
   LttField *f = thf->f1;
 
   LttvExecutionSubmode submode;
+  guint64 softirq = ltt_event_get_long_unsigned(e, f);
+  guint64 nb_softirqs = ((LttvTraceState *)(s->parent.t_context))->nb_softirqs;
+  GString *string;
 
-  submode = ((LttvTraceState *)(s->parent.t_context))->soft_irq_names[
-      ltt_event_get_long_unsigned(e, f)];
+  if(softirq < nb_softirqs) {
+    submode = ((LttvTraceState *)(s->parent.t_context))->soft_irq_names[softirq];
+  } else {
+    /* Fixup an incomplete irq table */
+    GString *string = g_string_new("");
+    g_string_printf(string, "softirq %llu", softirq);
+    submode = g_quark_from_string(string->str);
+    g_string_free(string, TRUE);
+  }
 
   /* Do something with the info about being in user or system mode when int? */
   push_state(s, LTTV_STATE_SOFT_IRQ, submode);
@@ -2069,11 +2132,11 @@ static gboolean schedchange(void *hook_data, void *call_data)
   LttEvent *e = ltt_tracefile_get_event(s->parent.tf);
   LttvTraceHookByFacility *thf = (LttvTraceHookByFacility *)hook_data;
   guint pid_in, pid_out;
-  gint state_out;
+  gint64 state_out;
 
   pid_out = ltt_event_get_unsigned(e, thf->f1);
   pid_in = ltt_event_get_unsigned(e, thf->f2);
-  state_out = ltt_event_get_int(e, thf->f3);
+  state_out = ltt_event_get_long_int(e, thf->f3);
   
   if(likely(process != NULL)) {
 
@@ -2089,24 +2152,31 @@ static gboolean schedchange(void *hook_data, void *call_data)
     //if(unlikely(process->pid != pid_out)) {
     //  g_assert(process->pid == 0);
     //}
-    if(process->pid == 0 && process->state->t == LTTV_STATE_MODE_UNKNOWN) {
-      /* Scheduling out of pid 0 at beginning of the trace :
-       * we know for sure it is in syscall mode at this point. */
-      g_assert(process->execution_stack->len == 1);
-      process->state->t = LTTV_STATE_SYSCALL;
-    }
-    if(unlikely(process->state->s == LTTV_STATE_EXIT)) {
-      process->state->s = LTTV_STATE_ZOMBIE;
-      process->state->change = s->parent.timestamp;
+    if(process->pid == 0
+      && process->state->t == LTTV_STATE_MODE_UNKNOWN) {
+      if(pid_out == 0) {
+        /* Scheduling out of pid 0 at beginning of the trace :
+         * we know for sure it is in syscall mode at this point. */
+        g_assert(process->execution_stack->len == 1);
+        process->state->t = LTTV_STATE_SYSCALL;
+        process->state->s = LTTV_STATE_WAIT;
+        process->state->change = s->parent.timestamp;
+        process->state->entry = s->parent.timestamp;
+      }
     } else {
-      if(unlikely(state_out == 0)) process->state->s = LTTV_STATE_WAIT_CPU;
-      else process->state->s = LTTV_STATE_WAIT;
-      process->state->change = s->parent.timestamp;
+      if(unlikely(process->state->s == LTTV_STATE_EXIT)) {
+        process->state->s = LTTV_STATE_ZOMBIE;
+        process->state->change = s->parent.timestamp;
+      } else {
+        if(unlikely(state_out == 0)) process->state->s = LTTV_STATE_WAIT_CPU;
+        else process->state->s = LTTV_STATE_WAIT;
+        process->state->change = s->parent.timestamp;
+      }
+      
+      if(state_out == 32 || state_out == 128)
+         exit_process(s, process); /* EXIT_DEAD || TASK_DEAD */
+            /* see sched.h for states */
     }
-    
-    if(state_out == 32)
-       exit_process(s, process); /* EXIT_DEAD */
-          /* see sched.h for states */
   }
   process = ts->running_process[cpu] =
               lttv_state_find_process_or_create(
@@ -2119,6 +2189,13 @@ static gboolean schedchange(void *hook_data, void *call_data)
     process->usertrace->cpu = cpu;
  // process->last_cpu_index = ltt_tracefile_num(((LttvTracefileContext*)s)->tf);
   process->state->change = s->parent.timestamp;
+
+  /* update cpu status */
+  if(pid_in == 0)
+    s->cpu_state->present_state = LTTV_CPU_IDLE;
+  else
+    s->cpu_state->present_state = LTTV_CPU_BUSY;
+
   return FALSE;
 }
 
@@ -2195,7 +2272,8 @@ static gboolean process_fork(void *hook_data, void *call_data)
   return FALSE;
 }
 
-/* We stamp a newly created process as kernel_thread */
+/* We stamp a newly created process as kernel_thread.
+ * The thread should not be running yet. */
 static gboolean process_kernel_thread(void *hook_data, void *call_data)
 {
   LttvTracefileState *s = (LttvTracefileState *)call_data;
@@ -2208,11 +2286,15 @@ static gboolean process_kernel_thread(void *hook_data, void *call_data)
   LttvExecutionState *es;
 
   /* PID */
-  pid = ltt_event_get_unsigned(e, thf->f1);
+  pid = (guint)ltt_event_get_long_unsigned(e, thf->f1);
   s->parent.target_pid = pid;
 
-  process = lttv_state_find_process(ts, ANY_CPU, pid);
-  es = &g_array_index(process->execution_stack, LttvExecutionState, 0);
+  process = lttv_state_find_process_or_create(ts, ANY_CPU, pid,
+               &ltt_time_zero);
+  process->execution_stack = 
+    g_array_set_size(process->execution_stack, 1);
+  es = process->state =
+    &g_array_index(process->execution_stack, LttvExecutionState, 0);
   es->t = LTTV_STATE_SYSCALL;
   process->type = LTTV_STATE_KERNEL_THREAD;
 
@@ -2300,6 +2382,7 @@ static gboolean process_exec(void *hook_data, void *call_data)
   guint cpu = s->cpu;
   LttvProcessState *process = ts->running_process[cpu];
 
+#if 0//how to use a sequence that must be transformed in a string
   /* PID of the process to release */
   guint64 name_len = ltt_event_field_element_number(e, thf->f1);
   //name = ltt_event_get_string(e, thf->f1);
@@ -2309,10 +2392,12 @@ static gboolean process_exec(void *hook_data, void *call_data)
   gchar *null_term_name = g_new(gchar, name_len+1);
   memcpy(null_term_name, name_begin, name_len);
   null_term_name[name_len] = '\0';
-
   process->name = g_quark_from_string(null_term_name);
+#endif //0
+
+  process->name = g_quark_from_string(ltt_event_get_string(e, thf->f1));
   process->brand = LTTV_STATE_UNBRANDED;
-  g_free(null_term_name);
+  //g_free(null_term_name);
   return FALSE;
 }
 
@@ -2332,6 +2417,74 @@ static gboolean thread_brand(void *hook_data, void *call_data)
   return FALSE;
 }
 
+static void fix_process(gpointer key, gpointer value,
+   gpointer user_data)
+{
+  LttvProcessState *process;
+  LttvExecutionState *es;
+  process = (LttvProcessState *)value;
+  LttvTracefileContext *tfc = (LttvTracefileContext *)user_data;
+  LttTime *timestamp = (LttTime*)user_data;
+
+  if(process->type == LTTV_STATE_KERNEL_THREAD) {
+    es = &g_array_index(process->execution_stack, LttvExecutionState, 0);
+    if(es->t == LTTV_STATE_MODE_UNKNOWN) {
+      es->t = LTTV_STATE_SYSCALL;
+      es->n = LTTV_STATE_SUBMODE_NONE;
+      es->entry = *timestamp;
+      es->change = *timestamp;
+      es->cum_cpu_time = ltt_time_zero;
+      if(es->s == LTTV_STATE_UNNAMED)
+        es->s = LTTV_STATE_WAIT;
+    }
+  } else {
+    es = &g_array_index(process->execution_stack, LttvExecutionState, 0);
+    if(es->t == LTTV_STATE_MODE_UNKNOWN) {
+      es->t = LTTV_STATE_USER_MODE;
+      es->n = LTTV_STATE_SUBMODE_NONE;
+      es->entry = *timestamp;
+      //g_assert(timestamp->tv_sec != 0);
+      es->change = *timestamp;
+      es->cum_cpu_time = ltt_time_zero;
+      if(es->s == LTTV_STATE_UNNAMED)
+        es->s = LTTV_STATE_RUN;
+
+      if(process->execution_stack->len == 1) {
+        /* Still in bottom unknown mode, means never did a system call
+        * May be either in user mode, syscall mode, running or waiting.*/
+       /* FIXME : we may be tagging syscall mode when being user mode */
+        process->execution_stack =
+          g_array_set_size(process->execution_stack, 2);
+        es = process->state = &g_array_index(process->execution_stack, 
+          LttvExecutionState, 1);
+        es->t = LTTV_STATE_SYSCALL;
+        es->n = LTTV_STATE_SUBMODE_NONE;
+        es->entry = *timestamp;
+        //g_assert(timestamp->tv_sec != 0);
+        es->change = *timestamp;
+        es->cum_cpu_time = ltt_time_zero;
+       if(es->s == LTTV_STATE_WAIT_FORK)
+          es->s = LTTV_STATE_WAIT;
+      }
+    }
+  }
+}
+
+static gboolean statedump_end(void *hook_data, void *call_data)
+{
+  LttvTracefileState *s = (LttvTracefileState *)call_data;
+  LttvTraceState *ts = (LttvTraceState*)s->parent.t_context;
+  LttvTracefileContext *tfc = (LttvTracefileContext *)call_data;
+  LttEvent *e = ltt_tracefile_get_event(s->parent.tf);
+  LttvTraceHookByFacility *thf = (LttvTraceHookByFacility *)hook_data;
+  
+  /* For all processes */
+    /* if kernel thread, if stack[0] is unknown, set to syscall mode, wait */
+    /* else, if stack[0] is unknown, set to user mode, running */
+
+  g_hash_table_foreach(ts->processes, fix_process, &tfc->timestamp);
+}
+
 static gboolean enum_process_state(void *hook_data, void *call_data)
 {
   LttvTracefileState *s = (LttvTracefileState *)call_data;
@@ -2351,6 +2504,7 @@ static gboolean enum_process_state(void *hook_data, void *call_data)
   LttField *f4, *f5, *f6, *f7, *f8;
   GQuark type, mode, submode, status;
   LttvExecutionState *es;
+  guint i, nb_cpus;
 
   /* PID */
   pid = ltt_event_get_unsigned(e, thf->f1);
@@ -2387,57 +2541,111 @@ static gboolean enum_process_state(void *hook_data, void *call_data)
   if(f8) tgid = ltt_event_get_unsigned(e, f8);
   else tgid = 0;
 
-  /* The process might exist if a process was forked while performing the state 
-   * dump. */
-  process = lttv_state_find_process(ts, ANY_CPU, pid);
-  if(process == NULL) {
-    parent_process = lttv_state_find_process(ts, ANY_CPU, parent_pid);
-    process = lttv_state_create_process(ts, parent_process, cpu,
-                              pid, tgid, g_quark_from_string(command),
-                              &s->parent.timestamp);
-  
-    /* Keep the stack bottom : a running user mode */
-    /* Disabled because of inconsistencies in the current statedump states. */
-    if(type == LTTV_STATE_KERNEL_THREAD) {
-      /* Only keep the bottom */
-      process->execution_stack = g_array_set_size(process->execution_stack, 1);
-      es = process->state = &g_array_index(process->execution_stack, 
-          LttvExecutionState, 0);
-      es->t = LTTV_STATE_SYSCALL;
-      es->s = status;
-      es->n = submode;
-    } else {
-      /* On top of it : */
-      es = process->state = &g_array_index(process->execution_stack, 
-          LttvExecutionState, 1);
-      es->t = LTTV_STATE_USER_MODE;
-      es->s = status;
-      es->n = submode;
+
+  if(pid == 0) {
+    nb_cpus = ltt_trace_get_num_cpu(ts->parent.t);
+    for(i=0; i<nb_cpus; i++) {
+      process = lttv_state_find_process(ts, i, pid);
+      g_assert(process != NULL);
+
+      process->ppid = parent_pid;
+      process->tgid = tgid;
+      process->name = g_quark_from_string(command);
+      es =
+        &g_array_index(process->execution_stack, LttvExecutionState, 0);
+      process->type = LTTV_STATE_KERNEL_THREAD;
     }
+
+  } else {
+    /* The process might exist if a process was forked while performing the
+     * state dump. */
+    process = lttv_state_find_process(ts, ANY_CPU, pid);
+    if(process == NULL) {
+      parent_process = lttv_state_find_process(ts, ANY_CPU, parent_pid);
+      process = lttv_state_create_process(ts, parent_process, cpu,
+                                pid, tgid, g_quark_from_string(command),
+                                &s->parent.timestamp);
+    
+      /* Keep the stack bottom : a running user mode */
+      /* Disabled because of inconsistencies in the current statedump states. */
+      if(type == LTTV_STATE_KERNEL_THREAD) {
+        /* Only keep the bottom 
+         * FIXME Kernel thread : can be in syscall or interrupt or trap. */
+        /* Will cause expected trap when in fact being syscall (even after end of
+         * statedump event)
+         * Will cause expected interrupt when being syscall. (only before end of
+         * statedump event) */
+        // This will cause a "popping last state on stack, ignoring it."
+        process->execution_stack = g_array_set_size(process->execution_stack, 1);
+        es = process->state = &g_array_index(process->execution_stack, 
+            LttvExecutionState, 0);
+        process->type = LTTV_STATE_KERNEL_THREAD;
+        es->t = LTTV_STATE_MODE_UNKNOWN;
+        es->s = LTTV_STATE_UNNAMED;
+        es->n = LTTV_STATE_SUBMODE_UNKNOWN;
+  #if 0
+        es->t = LTTV_STATE_SYSCALL;
+        es->s = status;
+        es->n = submode;
+  #endif //0
+      } else {
+        /* User space process :
+         * bottom : user mode
+         * either currently running or scheduled out.
+         * can be scheduled out because interrupted in (user mode or in syscall)
+         * or because of an explicit call to the scheduler in syscall. Note that
+         * the scheduler call comes after the irq_exit, so never in interrupt
+         * context. */
+        // temp workaround : set size to 1 : only have user mode bottom of stack.
+        // will cause g_info message of expected syscall mode when in fact being
+        // in user mode. Can also cause expected trap when in fact being user
+        // mode in the event of a page fault reenabling interrupts in the handler.
+        // Expected syscall and trap can also happen after the end of statedump
+        // This will cause a "popping last state on stack, ignoring it."
+        process->execution_stack = g_array_set_size(process->execution_stack, 1);
+        es = process->state = &g_array_index(process->execution_stack, 
+            LttvExecutionState, 0);
+        es->t = LTTV_STATE_MODE_UNKNOWN;
+        es->s = LTTV_STATE_UNNAMED;
+        es->n = LTTV_STATE_SUBMODE_UNKNOWN;
+  #if 0
+        es->t = LTTV_STATE_USER_MODE;
+        es->s = status;
+        es->n = submode;
+  #endif //0
+      }
+  #if 0
+      /* UNKNOWN STATE */
+      {
+        es = process->state = &g_array_index(process->execution_stack, 
+            LttvExecutionState, 1);
+        es->t = LTTV_STATE_MODE_UNKNOWN;
+        es->s = LTTV_STATE_UNNAMED;
+        es->n = LTTV_STATE_SUBMODE_UNKNOWN;
+      }
+  #endif //0
+    } else {
+      /* The process has already been created :
+       * Probably was forked while dumping the process state or
+       * was simply scheduled in prior to get the state dump event.
+       */
+      process->ppid = parent_pid;
+      process->tgid = tgid;
+      process->name = g_quark_from_string(command);
+      process->type = type;
+      es =
+        &g_array_index(process->execution_stack, LttvExecutionState, 0);
 #if 0
-    /* UNKNOWN STATE */
-    {
-      es = process->state = &g_array_index(process->execution_stack, 
-          LttvExecutionState, 1);
-      es->t = LTTV_STATE_MODE_UNKNOWN;
-      es->s = LTTV_STATE_UNNAMED;
-      es->n = LTTV_STATE_SUBMODE_UNKNOWN;
-    }
+      if(es->t == LTTV_STATE_MODE_UNKNOWN) {
+        if(type == LTTV_STATE_KERNEL_THREAD)
+          es->t = LTTV_STATE_SYSCALL;
+        else
+          es->t = LTTV_STATE_USER_MODE;
+      }
 #endif //0
-  } else {
-    /* The process has already been created :
-     * Probably was forked while dumping the process state or
-     * was simply scheduled in prior to get the state dump event.
-     * We know for sure if it is a user space thread.
-     */
-    process->ppid = parent_pid;
-    process->tgid = tgid;
-    process->name = g_quark_from_string(command);
-    es = &g_array_index(process->execution_stack, LttvExecutionState, 0);
-    if(type != LTTV_STATE_KERNEL_THREAD)
-      es->t = LTTV_STATE_USER_MODE;
-    /* Don't mess around with the stack, it will eventually become
-     * ok after the end of state dump. */
+      /* Don't mess around with the stack, it will eventually become
+       * ok after the end of state dump. */
+    }
   }
   
   return FALSE;
@@ -2477,13 +2685,11 @@ void lttv_state_add_event_hooks(LttvTracesetState *self)
   for(i = 0 ; i < nb_trace ; i++) {
     ts = (LttvTraceState *)self->parent.traces[i];
 
-    if(ts->has_precomputed_states) continue;
-
     /* Find the eventtype id for the following events and register the
        associated by id hooks. */
 
-    hooks = g_array_sized_new(FALSE, FALSE, sizeof(LttvTraceHook), 18);
-    hooks = g_array_set_size(hooks, 18); // Max possible number of hooks.
+    hooks = g_array_sized_new(FALSE, FALSE, sizeof(LttvTraceHook), 19);
+    hooks = g_array_set_size(hooks, 19); // Max possible number of hooks.
     hn = 0;
 
     ret = lttv_trace_find_hook(ts->parent.t,
@@ -2499,13 +2705,13 @@ void lttv_state_add_event_hooks(LttvTracesetState *self)
     if(ret) hn--;
 
     ret = lttv_trace_find_hook(ts->parent.t,
-        LTT_FACILITY_KERNEL, LTT_EVENT_TRAP_ENTRY,
+        LTT_FACILITY_KERNEL_ARCH, LTT_EVENT_TRAP_ENTRY,
         LTT_FIELD_TRAP_ID, 0, 0,
         trap_entry, NULL, &g_array_index(hooks, LttvTraceHook, hn++));
     if(ret) hn--;
 
     ret = lttv_trace_find_hook(ts->parent.t,
-        LTT_FACILITY_KERNEL, LTT_EVENT_TRAP_EXIT,
+        LTT_FACILITY_KERNEL_ARCH, LTT_EVENT_TRAP_EXIT,
         0, 0, 0, 
         trap_exit, NULL, &g_array_index(hooks, LttvTraceHook, hn++));
     if(ret) hn--;
@@ -2535,32 +2741,32 @@ void lttv_state_add_event_hooks(LttvTracesetState *self)
     if(ret) hn--;
 
     ret = lttv_trace_find_hook(ts->parent.t,
-        LTT_FACILITY_PROCESS, LTT_EVENT_SCHEDCHANGE,
-        LTT_FIELD_OUT, LTT_FIELD_IN, LTT_FIELD_OUT_STATE,
+        LTT_FACILITY_KERNEL, LTT_EVENT_SCHED_SCHEDULE,
+        LTT_FIELD_PREV_PID, LTT_FIELD_NEXT_PID, LTT_FIELD_PREV_STATE,
         schedchange, NULL, &g_array_index(hooks, LttvTraceHook, hn++));
     if(ret) hn--;
 
     ret = lttv_trace_find_hook(ts->parent.t,
-        LTT_FACILITY_PROCESS, LTT_EVENT_FORK,
-        LTT_FIELD_PARENT_PID, LTT_FIELD_CHILD_PID, LTT_FIELD_TGID,
+        LTT_FACILITY_KERNEL, LTT_EVENT_PROCESS_FORK,
+        LTT_FIELD_PARENT_PID, LTT_FIELD_CHILD_PID, LTT_FIELD_CHILD_TGID,
         process_fork, NULL, &g_array_index(hooks, LttvTraceHook, hn++));
     if(ret) hn--;
 
     ret = lttv_trace_find_hook(ts->parent.t,
-        LTT_FACILITY_PROCESS, LTT_EVENT_KERNEL_THREAD,
+        LTT_FACILITY_KERNEL_ARCH, LTT_EVENT_KTHREAD_CREATE,
         LTT_FIELD_PID, 0, 0,
         process_kernel_thread, NULL, &g_array_index(hooks, LttvTraceHook,
           hn++));
     if(ret) hn--;
 
     ret = lttv_trace_find_hook(ts->parent.t,
-        LTT_FACILITY_PROCESS, LTT_EVENT_EXIT,
+        LTT_FACILITY_KERNEL, LTT_EVENT_PROCESS_EXIT,
         LTT_FIELD_PID, 0, 0,
         process_exit, NULL, &g_array_index(hooks, LttvTraceHook, hn++));
     if(ret) hn--;
     
     ret = lttv_trace_find_hook(ts->parent.t,
-        LTT_FACILITY_PROCESS, LTT_EVENT_FREE,
+        LTT_FACILITY_KERNEL, LTT_EVENT_PROCESS_FREE,
         LTT_FIELD_PID, 0, 0,
         process_free, NULL, &g_array_index(hooks, LttvTraceHook, hn++));
     if(ret) hn--;
@@ -2579,11 +2785,17 @@ void lttv_state_add_event_hooks(LttvTracesetState *self)
 
      /* statedump-related hooks */
     ret = lttv_trace_find_hook(ts->parent.t,
-        LTT_FACILITY_STATEDUMP, LTT_EVENT_ENUM_PROCESS_STATE,
+        LTT_FACILITY_LIST, LTT_EVENT_PROCESS_STATE,
         LTT_FIELD_PID, LTT_FIELD_PARENT_PID, LTT_FIELD_NAME,
         enum_process_state, NULL, &g_array_index(hooks, LttvTraceHook, hn++));
     if(ret) hn--;
 
+    ret = lttv_trace_find_hook(ts->parent.t,
+        LTT_FACILITY_LIST, LTT_EVENT_STATEDUMP_END,
+        0, 0, 0,
+        statedump_end, NULL, &g_array_index(hooks, LttvTraceHook, hn++));
+    if(ret) hn--;
+
     ret = lttv_trace_find_hook(ts->parent.t,
         LTT_FACILITY_USER_GENERIC, LTT_EVENT_FUNCTION_ENTRY,
         LTT_FIELD_THIS_FN, LTT_FIELD_CALL_SITE, 0,
@@ -2655,8 +2867,6 @@ void lttv_state_remove_event_hooks(LttvTracesetState *self)
   for(i = 0 ; i < nb_trace ; i++) {
     ts = LTTV_TRACE_STATE(self->parent.traces[i]);
 
-    if(ts->has_precomputed_states) continue;
-
     lttv_attribute_find(ts->parent.a, LTTV_STATE_HOOKS, LTTV_POINTER, &val);
     hooks = *(val.v_pointer);
 
@@ -2880,6 +3090,8 @@ void lttv_state_save_add_event_hooks(LttvTracesetState *self)
     ts = (LttvTraceState *)self->parent.traces[i];
     nb_tracefile = ts->parent.tracefiles->len;
 
+    if(ts->has_precomputed_states) continue;
+
     guint *event_count = g_new(guint, 1);
     *event_count = 0;
 
@@ -2977,6 +3189,8 @@ void lttv_state_save_remove_event_hooks(LttvTracesetState *self)
     ts = (LttvTraceState *)self->parent.traces[i];
     nb_tracefile = ts->parent.tracefiles->len;
 
+    if(ts->has_precomputed_states) continue;
+
     guint *event_count = NULL;
 
     for(j = 0 ; j < nb_tracefile ; j++) {
@@ -3267,9 +3481,8 @@ static void module_init()
   
   LTT_FACILITY_KERNEL     = g_quark_from_string("kernel");
   LTT_FACILITY_KERNEL_ARCH = g_quark_from_string("kernel_arch");
-  LTT_FACILITY_PROCESS    = g_quark_from_string("process");
   LTT_FACILITY_FS    = g_quark_from_string("fs");
-  LTT_FACILITY_STATEDUMP    = g_quark_from_string("statedump");
+  LTT_FACILITY_LIST = g_quark_from_string("list");
   LTT_FACILITY_USER_GENERIC    = g_quark_from_string("user_generic");
 
   
@@ -3281,13 +3494,14 @@ static void module_init()
   LTT_EVENT_IRQ_EXIT      = g_quark_from_string("irq_exit");
   LTT_EVENT_SOFT_IRQ_ENTRY     = g_quark_from_string("soft_irq_entry");
   LTT_EVENT_SOFT_IRQ_EXIT      = g_quark_from_string("soft_irq_exit");
-  LTT_EVENT_SCHEDCHANGE   = g_quark_from_string("schedchange");
-  LTT_EVENT_FORK          = g_quark_from_string("fork");
-  LTT_EVENT_KERNEL_THREAD = g_quark_from_string("kernel_thread");
-  LTT_EVENT_EXIT          = g_quark_from_string("exit");
-  LTT_EVENT_FREE          = g_quark_from_string("free");
+  LTT_EVENT_SCHED_SCHEDULE   = g_quark_from_string("sched_schedule");
+  LTT_EVENT_PROCESS_FORK          = g_quark_from_string("process_fork");
+  LTT_EVENT_KTHREAD_CREATE = g_quark_from_string("kthread_create");
+  LTT_EVENT_PROCESS_EXIT          = g_quark_from_string("process_exit");
+  LTT_EVENT_PROCESS_FREE          = g_quark_from_string("process_free");
   LTT_EVENT_EXEC          = g_quark_from_string("exec");
-  LTT_EVENT_ENUM_PROCESS_STATE  = g_quark_from_string("enumerate_process_state");
+  LTT_EVENT_PROCESS_STATE  = g_quark_from_string("process_state");
+  LTT_EVENT_STATEDUMP_END  = g_quark_from_string("statedump_end");
   LTT_EVENT_FUNCTION_ENTRY  = g_quark_from_string("function_entry");
   LTT_EVENT_FUNCTION_EXIT  = g_quark_from_string("function_exit");
   LTT_EVENT_THREAD_BRAND  = g_quark_from_string("thread_brand");
@@ -3297,13 +3511,14 @@ static void module_init()
   LTT_FIELD_TRAP_ID       = g_quark_from_string("trap_id");
   LTT_FIELD_IRQ_ID        = g_quark_from_string("irq_id");
   LTT_FIELD_SOFT_IRQ_ID        = g_quark_from_string("softirq_id");
-  LTT_FIELD_OUT           = g_quark_from_string("out");
-  LTT_FIELD_IN            = g_quark_from_string("in");
-  LTT_FIELD_OUT_STATE     = g_quark_from_string("out_state");
+  LTT_FIELD_PREV_PID            = g_quark_from_string("prev_pid");
+  LTT_FIELD_NEXT_PID           = g_quark_from_string("next_pid");
+  LTT_FIELD_PREV_STATE     = g_quark_from_string("prev_state");
   LTT_FIELD_PARENT_PID    = g_quark_from_string("parent_pid");
   LTT_FIELD_CHILD_PID     = g_quark_from_string("child_pid");
   LTT_FIELD_PID           = g_quark_from_string("pid");
   LTT_FIELD_TGID          = g_quark_from_string("tgid");
+  LTT_FIELD_CHILD_TGID    = g_quark_from_string("child_tgid");
   LTT_FIELD_FILENAME      = g_quark_from_string("filename");
   LTT_FIELD_NAME          = g_quark_from_string("name");
   LTT_FIELD_TYPE          = g_quark_from_string("type");
@@ -3313,6 +3528,9 @@ static void module_init()
   LTT_FIELD_THIS_FN       = g_quark_from_string("this_fn");
   LTT_FIELD_CALL_SITE     = g_quark_from_string("call_site");
   
+  LTTV_CPU_UNKNOWN = g_quark_from_string("unknown");
+  LTTV_CPU_IDLE = g_quark_from_string("idle");
+  LTTV_CPU_BUSY = g_quark_from_string("busy");
 }
 
 static void module_destroy() 
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