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38d3ba4a5f8d8cfd6264428b1f72336e3dea0a59
[lttv.git] / lttv / lttv / state.c
1 /* This file is part of the Linux Trace Toolkit viewer
2 * Copyright (C) 2003-2004 Michel Dagenais
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License Version 2 as
6 * published by the Free Software Foundation;
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public License
14 * along with this program; if not, write to the Free Software
15 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
16 * MA 02111-1307, USA.
17 */
18
19 #define _GNU_SOURCE
20 #ifdef HAVE_CONFIG_H
21 #include <config.h>
22 #endif
23
24 #include <glib.h>
25 #include <lttv/lttv.h>
26 #include <lttv/module.h>
27 #include <lttv/state.h>
28 #include <ltt/trace.h>
29 #include <ltt/event.h>
30 #include <ltt/ltt.h>
31 #include <ltt/marker-desc.h>
32 #include <stdio.h>
33 #include <string.h>
34 #include <ltt/ltt-private.h>
35 #include <inttypes.h>
36
37 /* Comment :
38 * Mathieu Desnoyers
39 * usertrace is there only to be able to update the current CPU of the
40 * usertraces when there is a schedchange. it is a way to link the ProcessState
41 * to the associated usertrace. Link only created upon thread creation.
42 *
43 * The cpu id is necessary : it gives us back the current ProcessState when we
44 * are considering data from the usertrace.
45 */
46
47 #define PREALLOCATED_EXECUTION_STACK 10
48
49 /* Channel Quarks */
50
51 GQuark
52 LTT_CHANNEL_FD_STATE,
53 LTT_CHANNEL_GLOBAL_STATE,
54 LTT_CHANNEL_IRQ_STATE,
55 LTT_CHANNEL_MODULE_STATE,
56 LTT_CHANNEL_NETIF_STATE,
57 LTT_CHANNEL_SOFTIRQ_STATE,
58 LTT_CHANNEL_SWAP_STATE,
59 LTT_CHANNEL_SYSCALL_STATE,
60 LTT_CHANNEL_TASK_STATE,
61 LTT_CHANNEL_VM_STATE,
62 LTT_CHANNEL_KPROBE_STATE,
63 LTT_CHANNEL_FS,
64 LTT_CHANNEL_KERNEL,
65 LTT_CHANNEL_MM,
66 LTT_CHANNEL_USERSPACE,
67 LTT_CHANNEL_BLOCK;
68
69 /* Events Quarks */
70
71 GQuark
72 LTT_EVENT_SYSCALL_ENTRY,
73 LTT_EVENT_SYSCALL_EXIT,
74 LTT_EVENT_PAGE_FAULT_NOSEM_ENTRY,
75 LTT_EVENT_PAGE_FAULT_NOSEM_EXIT,
76 LTT_EVENT_PAGE_FAULT_ENTRY,
77 LTT_EVENT_PAGE_FAULT_EXIT,
78 LTT_EVENT_TRAP_ENTRY,
79 LTT_EVENT_TRAP_EXIT,
80 LTT_EVENT_IRQ_ENTRY,
81 LTT_EVENT_IRQ_EXIT,
82 LTT_EVENT_SOFT_IRQ_RAISE,
83 LTT_EVENT_SOFT_IRQ_ENTRY,
84 LTT_EVENT_SOFT_IRQ_EXIT,
85 LTT_EVENT_SCHED_SCHEDULE,
86 LTT_EVENT_SCHED_TRY_WAKEUP,
87 LTT_EVENT_PROCESS_FORK,
88 LTT_EVENT_KTHREAD_CREATE,
89 LTT_EVENT_PROCESS_EXIT,
90 LTT_EVENT_PROCESS_FREE,
91 LTT_EVENT_EXEC,
92 LTT_EVENT_PROCESS_STATE,
93 LTT_EVENT_STATEDUMP_END,
94 LTT_EVENT_FUNCTION_ENTRY,
95 LTT_EVENT_FUNCTION_EXIT,
96 LTT_EVENT_THREAD_BRAND,
97 LTT_EVENT_REQUEST_ISSUE,
98 LTT_EVENT_REQUEST_COMPLETE,
99 LTT_EVENT_LIST_INTERRUPT,
100 LTT_EVENT_SYS_CALL_TABLE,
101 LTT_EVENT_SOFTIRQ_VEC,
102 LTT_EVENT_KPROBE_TABLE,
103 LTT_EVENT_KPROBE,
104 LTT_EVENT_OPEN,
105 LTT_EVENT_READ,
106 LTT_EVENT_POLL_EVENT;
107
108 /* Fields Quarks */
109
110 GQuark
111 LTT_FIELD_SYSCALL_ID,
112 LTT_FIELD_TRAP_ID,
113 LTT_FIELD_IRQ_ID,
114 LTT_FIELD_SOFT_IRQ_ID,
115 LTT_FIELD_PREV_PID,
116 LTT_FIELD_NEXT_PID,
117 LTT_FIELD_PREV_STATE,
118 LTT_FIELD_PARENT_PID,
119 LTT_FIELD_CHILD_PID,
120 LTT_FIELD_PID,
121 LTT_FIELD_TGID,
122 LTT_FIELD_CHILD_TGID,
123 LTT_FIELD_FILENAME,
124 LTT_FIELD_NAME,
125 LTT_FIELD_TYPE,
126 LTT_FIELD_MODE,
127 LTT_FIELD_SUBMODE,
128 LTT_FIELD_STATUS,
129 LTT_FIELD_THIS_FN,
130 LTT_FIELD_CALL_SITE,
131 LTT_FIELD_MINOR,
132 LTT_FIELD_MAJOR,
133 LTT_FIELD_OPERATION,
134 LTT_FIELD_ACTION,
135 LTT_FIELD_ID,
136 LTT_FIELD_ADDRESS,
137 LTT_FIELD_SYMBOL,
138 LTT_FIELD_IP,
139 LTT_FIELD_FD,
140 LTT_FIELD_STATE,
141 LTT_FIELD_CPU_ID;
142
143 LttvExecutionMode
144 LTTV_STATE_MODE_UNKNOWN,
145 LTTV_STATE_USER_MODE,
146 LTTV_STATE_MAYBE_USER_MODE,
147 LTTV_STATE_SYSCALL,
148 LTTV_STATE_MAYBE_SYSCALL,
149 LTTV_STATE_TRAP,
150 LTTV_STATE_MAYBE_TRAP,
151 LTTV_STATE_IRQ,
152 LTTV_STATE_SOFT_IRQ;
153
154 LttvExecutionSubmode
155 LTTV_STATE_SUBMODE_UNKNOWN,
156 LTTV_STATE_SUBMODE_NONE;
157
158 LttvProcessStatus
159 LTTV_STATE_UNNAMED,
160 LTTV_STATE_WAIT_FORK,
161 LTTV_STATE_WAIT_CPU,
162 LTTV_STATE_EXIT,
163 LTTV_STATE_ZOMBIE,
164 LTTV_STATE_WAIT,
165 LTTV_STATE_RUN,
166 LTTV_STATE_DEAD;
167
168 GQuark
169 LTTV_STATE_UNBRANDED;
170
171 LttvProcessType
172 LTTV_STATE_USER_THREAD,
173 LTTV_STATE_KERNEL_THREAD;
174
175 LttvCPUMode
176 LTTV_CPU_UNKNOWN,
177 LTTV_CPU_IDLE,
178 LTTV_CPU_BUSY,
179 LTTV_CPU_IRQ,
180 LTTV_CPU_SOFT_IRQ,
181 LTTV_CPU_TRAP;
182
183 LttvIRQMode
184 LTTV_IRQ_UNKNOWN,
185 LTTV_IRQ_IDLE,
186 LTTV_IRQ_BUSY;
187
188 LttvBdevMode
189 LTTV_BDEV_UNKNOWN,
190 LTTV_BDEV_IDLE,
191 LTTV_BDEV_BUSY_READING,
192 LTTV_BDEV_BUSY_WRITING;
193
194 static GQuark
195 LTTV_STATE_TRACEFILES,
196 LTTV_STATE_PROCESSES,
197 LTTV_STATE_PROCESS,
198 LTTV_STATE_RUNNING_PROCESS,
199 LTTV_STATE_EVENT,
200 LTTV_STATE_SAVED_STATES,
201 LTTV_STATE_SAVED_STATES_TIME,
202 LTTV_STATE_TIME,
203 LTTV_STATE_HOOKS,
204 LTTV_STATE_NAME_TABLES,
205 LTTV_STATE_TRACE_STATE_USE_COUNT,
206 LTTV_STATE_RESOURCE_CPUS,
207 LTTV_STATE_RESOURCE_CPUS_COUNT,
208 LTTV_STATE_RESOURCE_IRQS,
209 LTTV_STATE_RESOURCE_SOFT_IRQS,
210 LTTV_STATE_RESOURCE_TRAPS,
211 LTTV_STATE_RESOURCE_BLKDEVS;
212
213 static void create_max_time(LttvTraceState *tcs);
214
215 static void get_max_time(LttvTraceState *tcs);
216
217 static void free_max_time(LttvTraceState *tcs);
218
219 static void create_name_tables(LttvTraceState *tcs);
220
221 static void get_name_tables(LttvTraceState *tcs);
222
223 static void free_name_tables(LttvTraceState *tcs);
224
225 static void free_saved_state(LttvTraceState *tcs);
226
227 static void lttv_state_free_process_table(GHashTable *processes);
228
229 static void lttv_trace_states_read_raw(LttvTraceState *tcs, FILE *fp,
230 GPtrArray *quarktable);
231
232 /* Resource function prototypes */
233 static LttvBdevState *get_hashed_bdevstate(LttvTraceState *ts, guint32 devcode);
234 static LttvBdevState *bdevstate_new(void);
235 static void bdevstate_free(LttvBdevState *);
236 static void bdevstate_free_cb(gpointer key, gpointer value, gpointer user_data);
237 static LttvBdevState *bdevstate_copy(LttvBdevState *bds);
238
239
240 #if (__WORDSIZE == 32)
241 guint guint64_hash(gconstpointer key)
242 {
243 guint64 ukey = *(const guint64 *)key;
244
245 return (guint)ukey ^ (guint)(ukey >> 32);
246 }
247
248 gboolean guint64_equal(gconstpointer a, gconstpointer b)
249 {
250 guint64 ua = *(const guint64 *)a;
251 guint64 ub = *(const guint64 *)b;
252
253 return ua == ub;
254 }
255 #endif
256
257 void lttv_state_save(LttvTraceState *self, LttvAttribute *container)
258 {
259 LTTV_TRACE_STATE_GET_CLASS(self)->state_save(self, container);
260 }
261
262
263 void lttv_state_restore(LttvTraceState *self, LttvAttribute *container)
264 {
265 LTTV_TRACE_STATE_GET_CLASS(self)->state_restore(self, container);
266 }
267
268
269 void lttv_state_state_saved_free(LttvTraceState *self,
270 LttvAttribute *container)
271 {
272 LTTV_TRACE_STATE_GET_CLASS(self)->state_saved_free(self, container);
273 }
274
275
276 guint process_hash(gconstpointer key)
277 {
278 guint pid = ((const LttvProcessState *)key)->pid;
279 return (pid>>8 ^ pid>>4 ^ pid>>2 ^ pid) ;
280 }
281
282
283 /* If the hash table hash function is well distributed,
284 * the process_equal should compare different pid */
285 gboolean process_equal(gconstpointer a, gconstpointer b)
286 {
287 const LttvProcessState *process_a, *process_b;
288 gboolean ret = TRUE;
289
290 process_a = (const LttvProcessState *)a;
291 process_b = (const LttvProcessState *)b;
292
293 if(likely(process_a->pid != process_b->pid)) ret = FALSE;
294 else if(likely(process_a->pid == 0 &&
295 process_a->cpu != process_b->cpu)) ret = FALSE;
296
297 return ret;
298 }
299
300 static void delete_usertrace(gpointer key, gpointer value, gpointer user_data)
301 {
302 g_tree_destroy((GTree*)value);
303 }
304
305 static void lttv_state_free_usertraces(GHashTable *usertraces)
306 {
307 g_hash_table_foreach(usertraces, delete_usertrace, NULL);
308 g_hash_table_destroy(usertraces);
309 }
310
311 gboolean rettrue(gpointer key, gpointer value, gpointer user_data)
312 {
313 return TRUE;
314 }
315
316 static guint check_expand(nb, id)
317 {
318 if(likely(nb > id))
319 return nb;
320 else
321 return max(id + 1, nb * 2);
322 }
323
324 static void expand_name_table(LttvTraceState *ts, GQuark **table,
325 guint nb, guint new_nb)
326 {
327 /* Expand an incomplete table */
328 GQuark *old_table = *table;
329 *table = g_new(GQuark, new_nb);
330 memcpy(*table, old_table, nb * sizeof(GQuark));
331 g_free(old_table);
332 }
333
334 static void fill_name_table(LttvTraceState *ts, GQuark *table, guint nb,
335 guint new_nb, const char *def_string)
336 {
337 guint i;
338 GString *fe_name = g_string_new("");
339 for(i = nb; i < new_nb; i++) {
340 g_string_printf(fe_name, "%s %d", def_string, i);
341 table[i] = g_quark_from_string(fe_name->str);
342 }
343 g_string_free(fe_name, TRUE);
344 }
345
346 static void expand_syscall_table(LttvTraceState *ts, int id)
347 {
348 LttvNameTables *nt = ts->name_tables;
349 guint new_nb;
350
351 new_nb = check_expand(nt->nb_syscalls, id);
352 if(likely(new_nb == nt->nb_syscalls))
353 return;
354 expand_name_table(ts, &nt->syscall_names, nt->nb_syscalls, new_nb);
355 fill_name_table(ts, nt->syscall_names, nt->nb_syscalls, new_nb, "syscall");
356 /* Update the table size */
357 nt->nb_syscalls = new_nb;
358 }
359
360 static void expand_kprobe_table(LttvTraceState *ts, guint64 ip, char *symbol)
361 {
362 LttvNameTables *nt = ts->name_tables;
363 #if (__WORDSIZE == 32)
364 guint64 *ip_ptr = g_new(guint64, 1);
365 g_hash_table_insert(nt->kprobe_hash, ip_ptr,
366 (gpointer)(glong)g_quark_from_string(symbol));
367 #else
368 g_hash_table_insert(nt->kprobe_hash, (gpointer)ip,
369 (gpointer)(glong)g_quark_from_string(symbol));
370 #endif
371 }
372
373 static void expand_trap_table(LttvTraceState *ts, int id)
374 {
375 LttvNameTables *nt = ts->name_tables;
376 LttvTrapState *old_table;
377 guint new_nb, i;
378
379 new_nb = check_expand(nt->nb_traps, id);
380 if(likely(new_nb == nt->nb_traps))
381 return;
382
383 expand_name_table(ts, &nt->trap_names, nt->nb_traps, new_nb);
384 fill_name_table(ts, nt->trap_names, nt->nb_traps, new_nb, "trap");
385
386 old_table = ts->trap_states;
387 ts->trap_states = g_new(LttvTrapState, new_nb);
388 memcpy(ts->trap_states, old_table, nt->nb_traps * sizeof(LttvTrapState));
389 g_free(old_table);
390 for(i = nt->nb_traps; i < new_nb; i++)
391 ts->trap_states[i].running = 0;
392
393 /* Update the table size */
394 nt->nb_traps = new_nb;
395 }
396
397 static void expand_irq_table(LttvTraceState *ts, int id)
398 {
399 LttvNameTables *nt = ts->name_tables;
400 LttvIRQState *old_table;
401 guint new_nb, i;
402
403 new_nb = check_expand(nt->nb_irqs, id);
404 if(likely(new_nb == nt->nb_irqs))
405 return;
406
407 expand_name_table(ts, &nt->irq_names, nt->nb_irqs, new_nb);
408 fill_name_table(ts, nt->irq_names, nt->nb_irqs, new_nb, "irq");
409
410 old_table = ts->irq_states;
411 ts->irq_states = g_new(LttvIRQState, new_nb);
412 memcpy(ts->irq_states, old_table, nt->nb_irqs * sizeof(LttvIRQState));
413 g_free(old_table);
414 for(i = nt->nb_irqs; i < new_nb; i++)
415 ts->irq_states[i].mode_stack =
416 g_array_new(FALSE, FALSE, sizeof(LttvIRQMode));
417
418 /* Update the table size */
419 nt->nb_irqs = new_nb;
420 }
421
422 static void expand_soft_irq_table(LttvTraceState *ts, int id)
423 {
424 LttvNameTables *nt = ts->name_tables;
425 LttvSoftIRQState *old_table;
426 guint new_nb, i;
427
428 new_nb = check_expand(nt->nb_soft_irqs, id);
429 if(likely(new_nb == nt->nb_soft_irqs))
430 return;
431
432 expand_name_table(ts, &nt->soft_irq_names, nt->nb_soft_irqs, new_nb);
433 fill_name_table(ts, nt->soft_irq_names, nt->nb_soft_irqs, new_nb, "softirq");
434
435 old_table = ts->soft_irq_states;
436 ts->soft_irq_states = g_new(LttvSoftIRQState, new_nb);
437 memcpy(ts->soft_irq_states, old_table,
438 nt->nb_soft_irqs * sizeof(LttvSoftIRQState));
439 g_free(old_table);
440 for(i = nt->nb_soft_irqs; i < new_nb; i++)
441 ts->soft_irq_states[i].running = 0;
442
443 /* Update the table size */
444 nt->nb_soft_irqs = new_nb;
445 }
446
447 static void restore_init_state(LttvTraceState *self)
448 {
449 guint i, nb_cpus, nb_irqs, nb_soft_irqs, nb_traps;
450
451 //LttvTracefileState *tfcs;
452
453 LttTime start_time, end_time;
454
455 /* Free the process tables */
456 if(self->processes != NULL) lttv_state_free_process_table(self->processes);
457 if(self->usertraces != NULL) lttv_state_free_usertraces(self->usertraces);
458 self->processes = g_hash_table_new(process_hash, process_equal);
459 self->usertraces = g_hash_table_new(g_direct_hash, g_direct_equal);
460 self->nb_event = 0;
461
462 /* Seek time to beginning */
463 // Mathieu : fix : don't seek traceset here : causes inconsistency in seek
464 // closest. It's the tracecontext job to seek the trace to the beginning
465 // anyway : the init state might be used at the middle of the trace as well...
466 //g_tree_destroy(self->parent.ts_context->pqueue);
467 //self->parent.ts_context->pqueue = g_tree_new(compare_tracefile);
468
469 ltt_trace_time_span_get(self->parent.t, &start_time, &end_time);
470
471 //lttv_process_trace_seek_time(&self->parent, ltt_time_zero);
472
473 nb_cpus = ltt_trace_get_num_cpu(self->parent.t);
474 nb_irqs = self->name_tables->nb_irqs;
475 nb_soft_irqs = self->name_tables->nb_soft_irqs;
476 nb_traps = self->name_tables->nb_traps;
477
478 /* Put the per cpu running_process to beginning state : process 0. */
479 for(i=0; i< nb_cpus; i++) {
480 LttvExecutionState *es;
481 self->running_process[i] = lttv_state_create_process(self, NULL, i, 0, 0,
482 LTTV_STATE_UNNAMED, &start_time);
483 /* We are not sure is it's a kernel thread or normal thread, put the
484 * bottom stack state to unknown */
485 self->running_process[i]->execution_stack =
486 g_array_set_size(self->running_process[i]->execution_stack, 1);
487 es = self->running_process[i]->state =
488 &g_array_index(self->running_process[i]->execution_stack,
489 LttvExecutionState, 0);
490 es->t = LTTV_STATE_MODE_UNKNOWN;
491 es->s = LTTV_STATE_UNNAMED;
492
493 //self->running_process[i]->state->s = LTTV_STATE_RUN;
494 self->running_process[i]->cpu = i;
495
496 /* reset cpu states */
497 if(self->cpu_states[i].mode_stack->len > 0) {
498 g_array_remove_range(self->cpu_states[i].mode_stack, 0,
499 self->cpu_states[i].mode_stack->len);
500 if(self->cpu_states[i].irq_stack->len)
501 g_array_remove_range(self->cpu_states[i].irq_stack, 0,
502 self->cpu_states[i].irq_stack->len);
503 if(self->cpu_states[i].softirq_stack->len)
504 g_array_remove_range(self->cpu_states[i].softirq_stack, 0,
505 self->cpu_states[i].softirq_stack->len);
506 if(self->cpu_states[i].trap_stack->len)
507 g_array_remove_range(self->cpu_states[i].trap_stack, 0,
508 self->cpu_states[i].trap_stack->len);
509 }
510 }
511
512 /* reset irq states */
513 for(i=0; i<nb_irqs; i++) {
514 if(self->irq_states[i].mode_stack->len > 0)
515 g_array_remove_range(self->irq_states[i].mode_stack, 0,
516 self->irq_states[i].mode_stack->len);
517 }
518
519 /* reset softirq states */
520 for(i=0; i<nb_soft_irqs; i++) {
521 self->soft_irq_states[i].pending = 0;
522 self->soft_irq_states[i].running = 0;
523 }
524
525 /* reset trap states */
526 for(i=0; i<nb_traps; i++) {
527 self->trap_states[i].running = 0;
528 }
529
530 /* reset bdev states */
531 g_hash_table_foreach(self->bdev_states, bdevstate_free_cb, NULL);
532 //g_hash_table_steal_all(self->bdev_states);
533 g_hash_table_foreach_steal(self->bdev_states, rettrue, NULL);
534
535 #if 0
536 nb_tracefile = self->parent.tracefiles->len;
537
538 for(i = 0 ; i < nb_tracefile ; i++) {
539 tfcs =
540 LTTV_TRACEFILE_STATE(g_array_index(self->parent.tracefiles,
541 LttvTracefileContext*, i));
542 ltt_trace_time_span_get(self->parent.t, &tfcs->parent.timestamp, NULL);
543 // tfcs->saved_position = 0;
544 tfcs->process = lttv_state_create_process(tfcs, NULL,0);
545 tfcs->process->state->s = LTTV_STATE_RUN;
546 tfcs->process->last_cpu = tfcs->cpu_name;
547 tfcs->process->last_cpu_index = ltt_tracefile_num(((LttvTracefileContext*)tfcs)->tf);
548 }
549 #endif //0
550 }
551
552 //static LttTime time_zero = {0,0};
553
554 static gint compare_usertraces(gconstpointer a, gconstpointer b,
555 gpointer user_data)
556 {
557 const LttTime *t1 = (const LttTime *)a;
558 const LttTime *t2 = (const LttTime *)b;
559
560 return ltt_time_compare(*t1, *t2);
561 }
562
563 static void free_usertrace_key(gpointer data)
564 {
565 g_free(data);
566 }
567
568 #define MAX_STRING_LEN 4096
569
570 static void state_load_saved_states(LttvTraceState *tcs)
571 {
572 FILE *fp;
573 GPtrArray *quarktable;
574 const char *trace_path;
575 char path[PATH_MAX];
576 guint count;
577 guint i;
578 tcs->has_precomputed_states = FALSE;
579 GQuark q;
580 gchar *string;
581 gint hdr;
582 gchar buf[MAX_STRING_LEN];
583 guint len;
584 size_t res;
585
586 trace_path = g_quark_to_string(ltt_trace_name(tcs->parent.t));
587 strncpy(path, trace_path, PATH_MAX-1);
588 count = strnlen(trace_path, PATH_MAX-1);
589 // quarktable : open, test
590 strncat(path, "/precomputed/quarktable", PATH_MAX-count-1);
591 fp = fopen(path, "r");
592 if(!fp) return;
593 quarktable = g_ptr_array_sized_new(4096);
594
595 /* Index 0 is null */
596 hdr = fgetc(fp);
597 if(hdr == EOF) return;
598 g_assert(hdr == HDR_QUARKS);
599 q = 1;
600 do {
601 hdr = fgetc(fp);
602 if(hdr == EOF) break;
603 g_assert(hdr == HDR_QUARK);
604 g_ptr_array_set_size(quarktable, q+1);
605 i=0;
606 while(1) {
607 res = fread(&buf[i], sizeof(gchar), 1, fp);
608 g_assert(res == 1);
609 if(buf[i] == '\0' || feof(fp)) break;
610 i++;
611 }
612 len = strnlen(buf, MAX_STRING_LEN-1);
613 g_ptr_array_index (quarktable, q) = g_new(gchar, len+1);
614 strncpy(g_ptr_array_index (quarktable, q), buf, len+1);
615 q++;
616 } while(1);
617
618 fclose(fp);
619
620 // saved_states : open, test
621 strncpy(path, trace_path, PATH_MAX-1);
622 count = strnlen(trace_path, PATH_MAX-1);
623 strncat(path, "/precomputed/states", PATH_MAX-count-1);
624 fp = fopen(path, "r");
625 if(!fp) return;
626
627 hdr = fgetc(fp);
628 if(hdr != HDR_TRACE) goto end;
629
630 lttv_trace_states_read_raw(tcs, fp, quarktable);
631
632 tcs->has_precomputed_states = TRUE;
633
634 end:
635 fclose(fp);
636
637 /* Free the quarktable */
638 for(i=0; i<quarktable->len; i++) {
639 string = g_ptr_array_index (quarktable, i);
640 g_free(string);
641 }
642 g_ptr_array_free(quarktable, TRUE);
643 return;
644 }
645
646 static void init(LttvTracesetState *self, LttvTraceset *ts)
647 {
648 guint i, j, nb_trace, nb_tracefile, nb_cpu;
649 guint64 nb_irq;
650
651 LttvTraceContext *tc;
652
653 LttvTraceState *tcs;
654
655 LttvTracefileState *tfcs;
656
657 LttvAttributeValue v;
658
659 LTTV_TRACESET_CONTEXT_CLASS(g_type_class_peek(LTTV_TRACESET_CONTEXT_TYPE))->
660 init((LttvTracesetContext *)self, ts);
661
662 nb_trace = lttv_traceset_number(ts);
663 for(i = 0 ; i < nb_trace ; i++) {
664 tc = self->parent.traces[i];
665 tcs = LTTV_TRACE_STATE(tc);
666 tcs->save_interval = LTTV_STATE_SAVE_INTERVAL;
667 lttv_attribute_find(tcs->parent.t_a, LTTV_STATE_TRACE_STATE_USE_COUNT,
668 LTTV_UINT, &v);
669 (*v.v_uint)++;
670
671 if(*(v.v_uint) == 1) {
672 create_name_tables(tcs);
673 create_max_time(tcs);
674 }
675 get_name_tables(tcs);
676 get_max_time(tcs);
677
678 nb_tracefile = tc->tracefiles->len;
679 nb_cpu = ltt_trace_get_num_cpu(tc->t);
680 nb_irq = tcs->name_tables->nb_irqs;
681 tcs->processes = NULL;
682 tcs->usertraces = NULL;
683 tcs->running_process = g_new(LttvProcessState*, nb_cpu);
684
685 /* init cpu resource stuff */
686 tcs->cpu_states = g_new(LttvCPUState, nb_cpu);
687 for(j = 0; j<nb_cpu; j++) {
688 tcs->cpu_states[j].mode_stack = g_array_new(FALSE, FALSE, sizeof(LttvCPUMode));
689 tcs->cpu_states[j].irq_stack = g_array_new(FALSE, FALSE, sizeof(gint));
690 tcs->cpu_states[j].softirq_stack = g_array_new(FALSE, FALSE, sizeof(gint));
691 tcs->cpu_states[j].trap_stack = g_array_new(FALSE, FALSE, sizeof(gint));
692 g_assert(tcs->cpu_states[j].mode_stack != NULL);
693 }
694
695 /* init irq resource stuff */
696 tcs->irq_states = g_new(LttvIRQState, nb_irq);
697 for(j = 0; j<nb_irq; j++) {
698 tcs->irq_states[j].mode_stack = g_array_new(FALSE, FALSE, sizeof(LttvIRQMode));
699 g_assert(tcs->irq_states[j].mode_stack != NULL);
700 }
701
702 /* init soft irq stuff */
703 /* the kernel has a statically fixed max of 32 softirqs */
704 tcs->soft_irq_states = g_new(LttvSoftIRQState, tcs->name_tables->nb_soft_irqs);
705
706 /* init trap stuff */
707 tcs->trap_states = g_new(LttvTrapState, tcs->name_tables->nb_traps);
708
709 /* init bdev resource stuff */
710 tcs->bdev_states = g_hash_table_new(g_int_hash, g_int_equal);
711
712 restore_init_state(tcs);
713 for(j = 0 ; j < nb_tracefile ; j++) {
714 tfcs =
715 LTTV_TRACEFILE_STATE(g_array_index(tc->tracefiles,
716 LttvTracefileContext*, j));
717 tfcs->tracefile_name = ltt_tracefile_name(tfcs->parent.tf);
718 tfcs->cpu = ltt_tracefile_cpu(tfcs->parent.tf);
719 tfcs->cpu_state = &(tcs->cpu_states[tfcs->cpu]);
720 if(ltt_tracefile_tid(tfcs->parent.tf) != 0) {
721 /* It's a Usertrace */
722 guint tid = ltt_tracefile_tid(tfcs->parent.tf);
723 GTree *usertrace_tree = (GTree*)g_hash_table_lookup(tcs->usertraces,
724 GUINT_TO_POINTER(tid));
725 if(!usertrace_tree) {
726 usertrace_tree = g_tree_new_full(compare_usertraces,
727 NULL, free_usertrace_key, NULL);
728 g_hash_table_insert(tcs->usertraces,
729 GUINT_TO_POINTER(tid), usertrace_tree);
730 }
731 LttTime *timestamp = g_new(LttTime, 1);
732 *timestamp = ltt_interpolate_time_from_tsc(tfcs->parent.tf,
733 ltt_tracefile_creation(tfcs->parent.tf));
734 g_tree_insert(usertrace_tree, timestamp, tfcs);
735 }
736 }
737
738 /* See if the trace has saved states */
739 state_load_saved_states(tcs);
740 }
741 }
742
743 static void fini(LttvTracesetState *self)
744 {
745 guint i, nb_trace;
746
747 LttvTraceState *tcs;
748
749 //LttvTracefileState *tfcs;
750
751 LttvAttributeValue v;
752
753 nb_trace = lttv_traceset_number(LTTV_TRACESET_CONTEXT(self)->ts);
754 for(i = 0 ; i < nb_trace ; i++) {
755 tcs = (LttvTraceState *)(LTTV_TRACESET_CONTEXT(self)->traces[i]);
756 lttv_attribute_find(tcs->parent.t_a, LTTV_STATE_TRACE_STATE_USE_COUNT,
757 LTTV_UINT, &v);
758
759 g_assert(*(v.v_uint) != 0);
760 (*v.v_uint)--;
761
762 if(*(v.v_uint) == 0) {
763 free_name_tables(tcs);
764 free_max_time(tcs);
765 free_saved_state(tcs);
766 }
767 g_free(tcs->running_process);
768 tcs->running_process = NULL;
769 lttv_state_free_process_table(tcs->processes);
770 lttv_state_free_usertraces(tcs->usertraces);
771 tcs->processes = NULL;
772 tcs->usertraces = NULL;
773 }
774 LTTV_TRACESET_CONTEXT_CLASS(g_type_class_peek(LTTV_TRACESET_CONTEXT_TYPE))->
775 fini((LttvTracesetContext *)self);
776 }
777
778
779 static LttvTracesetContext *new_traceset_context(LttvTracesetContext *self)
780 {
781 return LTTV_TRACESET_CONTEXT(g_object_new(LTTV_TRACESET_STATE_TYPE, NULL));
782 }
783
784
785 static LttvTraceContext *new_trace_context(LttvTracesetContext *self)
786 {
787 return LTTV_TRACE_CONTEXT(g_object_new(LTTV_TRACE_STATE_TYPE, NULL));
788 }
789
790
791 static LttvTracefileContext *new_tracefile_context(LttvTracesetContext *self)
792 {
793 return LTTV_TRACEFILE_CONTEXT(g_object_new(LTTV_TRACEFILE_STATE_TYPE, NULL));
794 }
795
796
797 /* Write the process state of the trace */
798
799 static void write_process_state(gpointer key, gpointer value,
800 gpointer user_data)
801 {
802 LttvProcessState *process;
803
804 LttvExecutionState *es;
805
806 FILE *fp = (FILE *)user_data;
807
808 guint i;
809 guint64 address;
810
811 process = (LttvProcessState *)value;
812 fprintf(fp," <PROCESS CORE=%p PID=%u TGID=%u PPID=%u TYPE=\"%s\" CTIME_S=%lu CTIME_NS=%lu ITIME_S=%lu ITIME_NS=%lu NAME=\"%s\" BRAND=\"%s\" CPU=\"%u\" FREE_EVENTS=\"%u\">\n",
813 process, process->pid, process->tgid, process->ppid,
814 g_quark_to_string(process->type),
815 process->creation_time.tv_sec,
816 process->creation_time.tv_nsec,
817 process->insertion_time.tv_sec,
818 process->insertion_time.tv_nsec,
819 g_quark_to_string(process->name),
820 g_quark_to_string(process->brand),
821 process->cpu, process->free_events);
822
823 for(i = 0 ; i < process->execution_stack->len; i++) {
824 es = &g_array_index(process->execution_stack, LttvExecutionState, i);
825 fprintf(fp, " <ES MODE=\"%s\" SUBMODE=\"%s\" ENTRY_S=%lu ENTRY_NS=%lu",
826 g_quark_to_string(es->t), g_quark_to_string(es->n),
827 es->entry.tv_sec, es->entry.tv_nsec);
828 fprintf(fp, " CHANGE_S=%lu CHANGE_NS=%lu STATUS=\"%s\"/>\n",
829 es->change.tv_sec, es->change.tv_nsec, g_quark_to_string(es->s));
830 }
831
832 for(i = 0 ; i < process->user_stack->len; i++) {
833 address = g_array_index(process->user_stack, guint64, i);
834 fprintf(fp, " <USER_STACK ADDRESS=\"%" PRIu64 "\"/>\n", address);
835 }
836
837 if(process->usertrace) {
838 fprintf(fp, " <USERTRACE NAME=\"%s\" CPU=%u\n/>",
839 g_quark_to_string(process->usertrace->tracefile_name),
840 process->usertrace->cpu);
841 }
842
843
844 fprintf(fp, " </PROCESS>\n");
845 }
846
847
848 void lttv_state_write(LttvTraceState *self, LttTime t, FILE *fp)
849 {
850 guint i, nb_tracefile, nb_block, offset;
851 guint64 tsc;
852
853 LttvTracefileState *tfcs;
854
855 LttTracefile *tf;
856
857 LttEventPosition *ep;
858
859 guint nb_cpus;
860
861 ep = ltt_event_position_new();
862
863 fprintf(fp,"<PROCESS_STATE TIME_S=%lu TIME_NS=%lu>\n", t.tv_sec, t.tv_nsec);
864
865 g_hash_table_foreach(self->processes, write_process_state, fp);
866
867 nb_cpus = ltt_trace_get_num_cpu(self->parent.t);
868 for(i=0;i<nb_cpus;i++) {
869 fprintf(fp," <CPU NUM=%u RUNNING_PROCESS=%u>\n",
870 i, self->running_process[i]->pid);
871 }
872
873 nb_tracefile = self->parent.tracefiles->len;
874
875 for(i = 0 ; i < nb_tracefile ; i++) {
876 tfcs =
877 LTTV_TRACEFILE_STATE(g_array_index(self->parent.tracefiles,
878 LttvTracefileContext*, i));
879 fprintf(fp, " <TRACEFILE TIMESTAMP_S=%lu TIMESTAMP_NS=%lu",
880 tfcs->parent.timestamp.tv_sec,
881 tfcs->parent.timestamp.tv_nsec);
882 LttEvent *e = ltt_tracefile_get_event(tfcs->parent.tf);
883 if(e == NULL) fprintf(fp,"/>\n");
884 else {
885 ltt_event_position(e, ep);
886 ltt_event_position_get(ep, &tf, &nb_block, &offset, &tsc);
887 fprintf(fp, " BLOCK=%u OFFSET=%u TSC=%" PRIu64 "/>\n", nb_block, offset,
888 tsc);
889 }
890 }
891 g_free(ep);
892 fprintf(fp,"</PROCESS_STATE>\n");
893 }
894
895
896 static void write_process_state_raw(gpointer key, gpointer value,
897 gpointer user_data)
898 {
899 LttvProcessState *process;
900
901 LttvExecutionState *es;
902
903 FILE *fp = (FILE *)user_data;
904
905 guint i;
906 guint64 address;
907
908 process = (LttvProcessState *)value;
909 fputc(HDR_PROCESS, fp);
910 //fwrite(&header, sizeof(header), 1, fp);
911 //fprintf(fp, "%s", g_quark_to_string(process->type));
912 //fputc('\0', fp);
913 fwrite(&process->type, sizeof(process->type), 1, fp);
914 //fprintf(fp, "%s", g_quark_to_string(process->name));
915 //fputc('\0', fp);
916 fwrite(&process->name, sizeof(process->name), 1, fp);
917 //fprintf(fp, "%s", g_quark_to_string(process->brand));
918 //fputc('\0', fp);
919 fwrite(&process->brand, sizeof(process->brand), 1, fp);
920 fwrite(&process->pid, sizeof(process->pid), 1, fp);
921 fwrite(&process->free_events, sizeof(process->free_events), 1, fp);
922 fwrite(&process->tgid, sizeof(process->tgid), 1, fp);
923 fwrite(&process->ppid, sizeof(process->ppid), 1, fp);
924 fwrite(&process->cpu, sizeof(process->cpu), 1, fp);
925 fwrite(&process->creation_time, sizeof(process->creation_time), 1, fp);
926 fwrite(&process->insertion_time, sizeof(process->insertion_time), 1, fp);
927
928 #if 0
929 fprintf(fp," <PROCESS CORE=%p PID=%u TGID=%u PPID=%u TYPE=\"%s\" CTIME_S=%lu CTIME_NS=%lu ITIME_S=%lu ITIME_NS=%lu NAME=\"%s\" BRAND=\"%s\" CPU=\"%u\" PROCESS_TYPE=%u>\n",
930 process, process->pid, process->tgid, process->ppid,
931 g_quark_to_string(process->type),
932 process->creation_time.tv_sec,
933 process->creation_time.tv_nsec,
934 process->insertion_time.tv_sec,
935 process->insertion_time.tv_nsec,
936 g_quark_to_string(process->name),
937 g_quark_to_string(process->brand),
938 process->cpu);
939 #endif //0
940
941 for(i = 0 ; i < process->execution_stack->len; i++) {
942 es = &g_array_index(process->execution_stack, LttvExecutionState, i);
943
944 fputc(HDR_ES, fp);
945 //fprintf(fp, "%s", g_quark_to_string(es->t));
946 //fputc('\0', fp);
947 fwrite(&es->t, sizeof(es->t), 1, fp);
948 //fprintf(fp, "%s", g_quark_to_string(es->n));
949 //fputc('\0', fp);
950 fwrite(&es->n, sizeof(es->n), 1, fp);
951 //fprintf(fp, "%s", g_quark_to_string(es->s));
952 //fputc('\0', fp);
953 fwrite(&es->s, sizeof(es->s), 1, fp);
954 fwrite(&es->entry, sizeof(es->entry), 1, fp);
955 fwrite(&es->change, sizeof(es->change), 1, fp);
956 fwrite(&es->cum_cpu_time, sizeof(es->cum_cpu_time), 1, fp);
957 #if 0
958 fprintf(fp, " <ES MODE=\"%s\" SUBMODE=\"%s\" ENTRY_S=%lu ENTRY_NS=%lu",
959 g_quark_to_string(es->t), g_quark_to_string(es->n),
960 es->entry.tv_sec, es->entry.tv_nsec);
961 fprintf(fp, " CHANGE_S=%lu CHANGE_NS=%lu STATUS=\"%s\"/>\n",
962 es->change.tv_sec, es->change.tv_nsec, g_quark_to_string(es->s));
963 #endif //0
964 }
965
966 for(i = 0 ; i < process->user_stack->len; i++) {
967 address = g_array_index(process->user_stack, guint64, i);
968 fputc(HDR_USER_STACK, fp);
969 fwrite(&address, sizeof(address), 1, fp);
970 #if 0
971 fprintf(fp, " <USER_STACK ADDRESS=\"%llu\"/>\n", address);
972 #endif //0
973 }
974
975 if(process->usertrace) {
976 fputc(HDR_USERTRACE, fp);
977 //fprintf(fp, "%s", g_quark_to_string(process->usertrace->tracefile_name));
978 //fputc('\0', fp);
979 fwrite(&process->usertrace->tracefile_name,
980 sizeof(process->usertrace->tracefile_name), 1, fp);
981 fwrite(&process->usertrace->cpu, sizeof(process->usertrace->cpu), 1, fp);
982 #if 0
983 fprintf(fp, " <USERTRACE NAME=\"%s\" CPU=%u\n/>",
984 g_quark_to_string(process->usertrace->tracefile_name),
985 process->usertrace->cpu);
986 #endif //0
987 }
988
989 }
990
991
992 void lttv_state_write_raw(LttvTraceState *self, LttTime t, FILE *fp)
993 {
994 guint i, nb_tracefile, nb_block, offset;
995 guint64 tsc;
996
997 LttvTracefileState *tfcs;
998
999 LttTracefile *tf;
1000
1001 LttEventPosition *ep;
1002
1003 guint nb_cpus;
1004
1005 ep = ltt_event_position_new();
1006
1007 //fprintf(fp,"<PROCESS_STATE TIME_S=%lu TIME_NS=%lu>\n", t.tv_sec, t.tv_nsec);
1008 fputc(HDR_PROCESS_STATE, fp);
1009 fwrite(&t, sizeof(t), 1, fp);
1010
1011 g_hash_table_foreach(self->processes, write_process_state_raw, fp);
1012
1013 nb_cpus = ltt_trace_get_num_cpu(self->parent.t);
1014 for(i=0;i<nb_cpus;i++) {
1015 fputc(HDR_CPU, fp);
1016 fwrite(&i, sizeof(i), 1, fp); /* cpu number */
1017 fwrite(&self->running_process[i]->pid,
1018 sizeof(self->running_process[i]->pid), 1, fp);
1019 //fprintf(fp," <CPU NUM=%u RUNNING_PROCESS=%u>\n",
1020 // i, self->running_process[i]->pid);
1021 }
1022
1023 nb_tracefile = self->parent.tracefiles->len;
1024
1025 for(i = 0 ; i < nb_tracefile ; i++) {
1026 tfcs =
1027 LTTV_TRACEFILE_STATE(g_array_index(self->parent.tracefiles,
1028 LttvTracefileContext*, i));
1029 // fprintf(fp, " <TRACEFILE TIMESTAMP_S=%lu TIMESTAMP_NS=%lu",
1030 // tfcs->parent.timestamp.tv_sec,
1031 // tfcs->parent.timestamp.tv_nsec);
1032 fputc(HDR_TRACEFILE, fp);
1033 fwrite(&tfcs->parent.timestamp, sizeof(tfcs->parent.timestamp), 1, fp);
1034 /* Note : if timestamp if LTT_TIME_INFINITE, there will be no
1035 * position following : end of trace */
1036 LttEvent *e = ltt_tracefile_get_event(tfcs->parent.tf);
1037 if(e != NULL) {
1038 ltt_event_position(e, ep);
1039 ltt_event_position_get(ep, &tf, &nb_block, &offset, &tsc);
1040 //fprintf(fp, " BLOCK=%u OFFSET=%u TSC=%llu/>\n", nb_block, offset,
1041 // tsc);
1042 fwrite(&nb_block, sizeof(nb_block), 1, fp);
1043 fwrite(&offset, sizeof(offset), 1, fp);
1044 fwrite(&tsc, sizeof(tsc), 1, fp);
1045 }
1046 }
1047 g_free(ep);
1048 }
1049
1050
1051 /* Read process state from a file */
1052
1053 /* Called because a HDR_PROCESS was found */
1054 static void read_process_state_raw(LttvTraceState *self, FILE *fp,
1055 GPtrArray *quarktable)
1056 {
1057 LttvExecutionState *es;
1058 LttvProcessState *process, *parent_process;
1059 LttvProcessState tmp;
1060 GQuark tmpq;
1061 size_t res;
1062
1063 guint64 *address;
1064
1065 res = fread(&tmp.type, sizeof(tmp.type), 1, fp);
1066 res += fread(&tmp.name, sizeof(tmp.name), 1, fp);
1067 res += fread(&tmp.brand, sizeof(tmp.brand), 1, fp);
1068 res += fread(&tmp.pid, sizeof(tmp.pid), 1, fp);
1069 res += fread(&tmp.free_events, sizeof(tmp.free_events), 1, fp);
1070 res += fread(&tmp.tgid, sizeof(tmp.tgid), 1, fp);
1071 res += fread(&tmp.ppid, sizeof(tmp.ppid), 1, fp);
1072 res += fread(&tmp.cpu, sizeof(tmp.cpu), 1, fp);
1073 res += fread(&tmp.creation_time, sizeof(tmp.creation_time), 1, fp);
1074 res += fread(&tmp.insertion_time, sizeof(tmp.insertion_time), 1, fp);
1075 g_assert(res == 10);
1076
1077 if(tmp.pid == 0) {
1078 process = lttv_state_find_process(self, tmp.cpu, tmp.pid);
1079 } else {
1080 /* We must link to the parent */
1081 parent_process = lttv_state_find_process_or_create(self, ANY_CPU, tmp.ppid,
1082 &ltt_time_zero);
1083 process = lttv_state_find_process(self, ANY_CPU, tmp.pid);
1084 if(process == NULL) {
1085 process = lttv_state_create_process(self, parent_process, tmp.cpu,
1086 tmp.pid, tmp.tgid,
1087 g_quark_from_string((gchar*)g_ptr_array_index(quarktable, tmp.name)),
1088 &tmp.creation_time);
1089 }
1090 }
1091 process->insertion_time = tmp.insertion_time;
1092 process->creation_time = tmp.creation_time;
1093 process->type = g_quark_from_string(
1094 (gchar*)g_ptr_array_index(quarktable, tmp.type));
1095 process->tgid = tmp.tgid;
1096 process->ppid = tmp.ppid;
1097 process->brand = g_quark_from_string(
1098 (gchar*)g_ptr_array_index(quarktable, tmp.brand));
1099 process->name =
1100 g_quark_from_string((gchar*)g_ptr_array_index(quarktable, tmp.name));
1101 process->free_events = tmp.free_events;
1102
1103 do {
1104 if(feof(fp) || ferror(fp)) goto end_loop;
1105
1106 gint hdr = fgetc(fp);
1107 if(hdr == EOF) goto end_loop;
1108
1109 switch(hdr) {
1110 case HDR_ES:
1111 process->execution_stack =
1112 g_array_set_size(process->execution_stack,
1113 process->execution_stack->len + 1);
1114 es = &g_array_index(process->execution_stack, LttvExecutionState,
1115 process->execution_stack->len-1);
1116 process->state = es;
1117
1118 res = fread(&es->t, sizeof(es->t), 1, fp);
1119 g_assert(res == 1);
1120 es->t = g_quark_from_string(
1121 (gchar*)g_ptr_array_index(quarktable, es->t));
1122 res = fread(&es->n, sizeof(es->n), 1, fp);
1123 g_assert(res == 1);
1124 es->n = g_quark_from_string(
1125 (gchar*)g_ptr_array_index(quarktable, es->n));
1126 res = fread(&es->s, sizeof(es->s), 1, fp);
1127 g_assert(res == 1);
1128 es->s = g_quark_from_string(
1129 (gchar*)g_ptr_array_index(quarktable, es->s));
1130 res = fread(&es->entry, sizeof(es->entry), 1, fp);
1131 res += fread(&es->change, sizeof(es->change), 1, fp);
1132 res += fread(&es->cum_cpu_time, sizeof(es->cum_cpu_time), 1, fp);
1133 g_assert(res == 3);
1134 break;
1135
1136 case HDR_USER_STACK:
1137 process->user_stack = g_array_set_size(process->user_stack,
1138 process->user_stack->len + 1);
1139 address = &g_array_index(process->user_stack, guint64,
1140 process->user_stack->len-1);
1141 res = fread(address, sizeof(address), 1, fp);
1142 g_assert(res == 1);
1143 process->current_function = *address;
1144 break;
1145
1146 case HDR_USERTRACE:
1147 res = fread(&tmpq, sizeof(tmpq), 1, fp);
1148 res += fread(&process->usertrace->cpu,
1149 sizeof(process->usertrace->cpu), 1, fp);
1150 g_assert(res == 2);
1151 break;
1152
1153 default:
1154 ungetc(hdr, fp);
1155 goto end_loop;
1156 };
1157 } while(1);
1158 end_loop:
1159 return;
1160 }
1161
1162
1163 /* Called because a HDR_PROCESS_STATE was found */
1164 /* Append a saved state to the trace states */
1165 void lttv_state_read_raw(LttvTraceState *self, FILE *fp, GPtrArray *quarktable)
1166 {
1167 guint i, nb_tracefile, nb_block, offset;
1168 guint64 tsc;
1169 LttvTracefileState *tfcs;
1170
1171 LttEventPosition *ep;
1172
1173 guint nb_cpus;
1174
1175 int hdr;
1176 size_t res;
1177
1178 LttTime t;
1179
1180 LttvAttribute *saved_states_tree, *saved_state_tree;
1181
1182 LttvAttributeValue value;
1183 GTree *pqueue = self->parent.ts_context->pqueue;
1184 ep = ltt_event_position_new();
1185
1186 restore_init_state(self);
1187
1188 res = fread(&t, sizeof(t), 1, fp);
1189 g_assert(res == 1);
1190
1191 do {
1192 if(feof(fp) || ferror(fp)) goto end_loop;
1193 hdr = fgetc(fp);
1194 if(hdr == EOF) goto end_loop;
1195
1196 switch(hdr) {
1197 case HDR_PROCESS:
1198 /* Call read_process_state_raw */
1199 read_process_state_raw(self, fp, quarktable);
1200 break;
1201 case HDR_TRACEFILE:
1202 case HDR_TRACESET:
1203 case HDR_TRACE:
1204 case HDR_QUARKS:
1205 case HDR_QUARK:
1206 case HDR_ES:
1207 case HDR_USER_STACK:
1208 case HDR_USERTRACE:
1209 case HDR_PROCESS_STATE:
1210 case HDR_CPU:
1211 ungetc(hdr, fp);
1212 goto end_loop;
1213 break;
1214 default:
1215 g_error("Error while parsing saved state file : unknown data header %d",
1216 hdr);
1217 };
1218 } while(1);
1219 end_loop:
1220
1221 nb_cpus = ltt_trace_get_num_cpu(self->parent.t);
1222 for(i=0;i<nb_cpus;i++) {
1223 int cpu_num;
1224 hdr = fgetc(fp);
1225 g_assert(hdr == HDR_CPU);
1226 res = fread(&cpu_num, sizeof(cpu_num), 1, fp); /* cpu number */
1227 g_assert(res == 1);
1228 g_assert(i == cpu_num);
1229 res = fread(&self->running_process[i]->pid,
1230 sizeof(self->running_process[i]->pid), 1, fp);
1231 g_assert(res == 1);
1232 }
1233
1234 nb_tracefile = self->parent.tracefiles->len;
1235
1236 for(i = 0 ; i < nb_tracefile ; i++) {
1237 tfcs =
1238 LTTV_TRACEFILE_STATE(g_array_index(self->parent.tracefiles,
1239 LttvTracefileContext*, i));
1240 // fprintf(fp, " <TRACEFILE TIMESTAMP_S=%lu TIMESTAMP_NS=%lu",
1241 // tfcs->parent.timestamp.tv_sec,
1242 // tfcs->parent.timestamp.tv_nsec);
1243 g_tree_remove(pqueue, &tfcs->parent);
1244 hdr = fgetc(fp);
1245 g_assert(hdr == HDR_TRACEFILE);
1246 res = fread(&tfcs->parent.timestamp, sizeof(tfcs->parent.timestamp), 1, fp);
1247 g_assert(res == 1);
1248 /* Note : if timestamp if LTT_TIME_INFINITE, there will be no
1249 * position following : end of trace */
1250 if(ltt_time_compare(tfcs->parent.timestamp, ltt_time_infinite) != 0) {
1251 res = fread(&nb_block, sizeof(nb_block), 1, fp);
1252 res += fread(&offset, sizeof(offset), 1, fp);
1253 res += fread(&tsc, sizeof(tsc), 1, fp);
1254 g_assert(res == 3);
1255 ltt_event_position_set(ep, tfcs->parent.tf, nb_block, offset, tsc);
1256 gint ret = ltt_tracefile_seek_position(tfcs->parent.tf, ep);
1257 g_assert(ret == 0);
1258 g_tree_insert(pqueue, &tfcs->parent, &tfcs->parent);
1259 }
1260 }
1261 g_free(ep);
1262
1263 saved_states_tree = lttv_attribute_find_subdir(self->parent.t_a,
1264 LTTV_STATE_SAVED_STATES);
1265 saved_state_tree = g_object_new(LTTV_ATTRIBUTE_TYPE, NULL);
1266 value = lttv_attribute_add(saved_states_tree,
1267 lttv_attribute_get_number(saved_states_tree), LTTV_GOBJECT);
1268 *(value.v_gobject) = (GObject *)saved_state_tree;
1269 value = lttv_attribute_add(saved_state_tree, LTTV_STATE_TIME, LTTV_TIME);
1270 *(value.v_time) = t;
1271 lttv_state_save(self, saved_state_tree);
1272 g_debug("Saving state at time %lu.%lu", t.tv_sec,
1273 t.tv_nsec);
1274
1275 *(self->max_time_state_recomputed_in_seek) = t;
1276
1277 }
1278
1279 /* Called when a HDR_TRACE is found */
1280 void lttv_trace_states_read_raw(LttvTraceState *tcs, FILE *fp,
1281 GPtrArray *quarktable)
1282 {
1283 int hdr;
1284
1285 do {
1286 if(feof(fp) || ferror(fp)) goto end_loop;
1287 hdr = fgetc(fp);
1288 if(hdr == EOF) goto end_loop;
1289
1290 switch(hdr) {
1291 case HDR_PROCESS_STATE:
1292 /* Call read_process_state_raw */
1293 lttv_state_read_raw(tcs, fp, quarktable);
1294 break;
1295 case HDR_TRACEFILE:
1296 case HDR_TRACESET:
1297 case HDR_TRACE:
1298 case HDR_QUARKS:
1299 case HDR_QUARK:
1300 case HDR_ES:
1301 case HDR_USER_STACK:
1302 case HDR_USERTRACE:
1303 case HDR_PROCESS:
1304 case HDR_CPU:
1305 g_error("Error while parsing saved state file :"
1306 " unexpected data header %d",
1307 hdr);
1308 break;
1309 default:
1310 g_error("Error while parsing saved state file : unknown data header %d",
1311 hdr);
1312 };
1313 } while(1);
1314 end_loop:
1315 *(tcs->max_time_state_recomputed_in_seek) = tcs->parent.time_span.end_time;
1316 restore_init_state(tcs);
1317 lttv_process_trace_seek_time(&tcs->parent, ltt_time_zero);
1318 return;
1319 }
1320
1321
1322
1323 /* Copy each process from an existing hash table to a new one */
1324
1325 static void copy_process_state(gpointer key, gpointer value,gpointer user_data)
1326 {
1327 LttvProcessState *process, *new_process;
1328
1329 GHashTable *new_processes = (GHashTable *)user_data;
1330
1331 guint i;
1332
1333 process = (LttvProcessState *)value;
1334 new_process = g_new(LttvProcessState, 1);
1335 *new_process = *process;
1336 new_process->execution_stack = g_array_sized_new(FALSE, FALSE,
1337 sizeof(LttvExecutionState), PREALLOCATED_EXECUTION_STACK);
1338 new_process->execution_stack =
1339 g_array_set_size(new_process->execution_stack,
1340 process->execution_stack->len);
1341 for(i = 0 ; i < process->execution_stack->len; i++) {
1342 g_array_index(new_process->execution_stack, LttvExecutionState, i) =
1343 g_array_index(process->execution_stack, LttvExecutionState, i);
1344 }
1345 new_process->state = &g_array_index(new_process->execution_stack,
1346 LttvExecutionState, new_process->execution_stack->len - 1);
1347 new_process->user_stack = g_array_sized_new(FALSE, FALSE,
1348 sizeof(guint64), 0);
1349 new_process->user_stack = g_array_set_size(new_process->user_stack,
1350 process->user_stack->len);
1351 for(i = 0 ; i < process->user_stack->len; i++) {
1352 g_array_index(new_process->user_stack, guint64, i) =
1353 g_array_index(process->user_stack, guint64, i);
1354 }
1355 new_process->current_function = process->current_function;
1356
1357 /* fd hash table stuff */
1358 {
1359 GHashTableIter it;
1360 gpointer key;
1361 gpointer value;
1362
1363 /* copy every item in the hash table */
1364 new_process->fds = g_hash_table_new(g_direct_hash, g_direct_equal);
1365
1366 g_hash_table_iter_init(&it, process->fds);
1367 while (g_hash_table_iter_next (&it, (void *)&key, (void *)&value)) {
1368 g_hash_table_insert(new_process->fds, key, value);
1369 }
1370 }
1371
1372 /* When done creating the new process state, insert it in the
1373 * hash table */
1374 g_hash_table_insert(new_processes, new_process, new_process);
1375 }
1376
1377
1378 static GHashTable *lttv_state_copy_process_table(GHashTable *processes)
1379 {
1380 GHashTable *new_processes = g_hash_table_new(process_hash, process_equal);
1381
1382 g_hash_table_foreach(processes, copy_process_state, new_processes);
1383 return new_processes;
1384 }
1385
1386 static LttvCPUState *lttv_state_copy_cpu_states(LttvCPUState *states, guint n)
1387 {
1388 guint i,j;
1389 LttvCPUState *retval;
1390
1391 retval = g_new(LttvCPUState, n);
1392
1393 for(i=0; i<n; i++) {
1394 retval[i].irq_stack = g_array_new(FALSE, FALSE, sizeof(gint));
1395 g_array_set_size(retval[i].irq_stack, states[i].irq_stack->len);
1396 for(j=0; j<states[i].irq_stack->len; j++) {
1397 g_array_index(retval[i].irq_stack, gint, j) =
1398 g_array_index(states[i].irq_stack, gint, j);
1399 }
1400
1401 retval[i].softirq_stack = g_array_new(FALSE, FALSE, sizeof(gint));
1402 g_array_set_size(retval[i].softirq_stack, states[i].softirq_stack->len);
1403 for(j=0; j<states[i].softirq_stack->len; j++) {
1404 g_array_index(retval[i].softirq_stack, gint, j) =
1405 g_array_index(states[i].softirq_stack, gint, j);
1406 }
1407
1408 retval[i].trap_stack = g_array_new(FALSE, FALSE, sizeof(gint));
1409 g_array_set_size(retval[i].trap_stack, states[i].trap_stack->len);
1410 for(j=0; j<states[i].trap_stack->len; j++) {
1411 g_array_index(retval[i].trap_stack, gint, j) =
1412 g_array_index(states[i].trap_stack, gint, j);
1413 }
1414
1415 retval[i].mode_stack = g_array_new(FALSE, FALSE, sizeof(LttvCPUMode));
1416 g_array_set_size(retval[i].mode_stack, states[i].mode_stack->len);
1417 for(j=0; j<states[i].mode_stack->len; j++) {
1418 g_array_index(retval[i].mode_stack, GQuark, j) =
1419 g_array_index(states[i].mode_stack, GQuark, j);
1420 }
1421 }
1422
1423 return retval;
1424 }
1425
1426 static void lttv_state_free_cpu_states(LttvCPUState *states, guint n)
1427 {
1428 guint i;
1429
1430 for(i=0; i<n; i++) {
1431 g_array_free(states[i].mode_stack, TRUE);
1432 g_array_free(states[i].irq_stack, TRUE);
1433 g_array_free(states[i].softirq_stack, TRUE);
1434 g_array_free(states[i].trap_stack, TRUE);
1435 }
1436
1437 g_free(states);
1438 }
1439
1440 static LttvIRQState *lttv_state_copy_irq_states(LttvIRQState *states, guint n)
1441 {
1442 guint i,j;
1443 LttvIRQState *retval;
1444
1445 retval = g_new(LttvIRQState, n);
1446
1447 for(i=0; i<n; i++) {
1448 retval[i].mode_stack = g_array_new(FALSE, FALSE, sizeof(LttvIRQMode));
1449 g_array_set_size(retval[i].mode_stack, states[i].mode_stack->len);
1450 for(j=0; j<states[i].mode_stack->len; j++) {
1451 g_array_index(retval[i].mode_stack, GQuark, j) =
1452 g_array_index(states[i].mode_stack, GQuark, j);
1453 }
1454 }
1455
1456 return retval;
1457 }
1458
1459 static void lttv_state_free_irq_states(LttvIRQState *states, guint n)
1460 {
1461 guint i;
1462
1463 for(i=0; i<n; i++) {
1464 g_array_free(states[i].mode_stack, TRUE);
1465 }
1466
1467 g_free(states);
1468 }
1469
1470 static LttvSoftIRQState *
1471 lttv_state_copy_soft_irq_states(LttvSoftIRQState *states, guint n)
1472 {
1473 guint i;
1474 LttvSoftIRQState *retval;
1475
1476 retval = g_new(LttvSoftIRQState, n);
1477
1478 for(i=0; i<n; i++) {
1479 retval[i].pending = states[i].pending;
1480 retval[i].running = states[i].running;
1481 }
1482
1483 return retval;
1484 }
1485
1486 static void lttv_state_free_soft_irq_states(LttvSoftIRQState *states, guint n)
1487 {
1488 g_free(states);
1489 }
1490
1491 static LttvTrapState *
1492 lttv_state_copy_trap_states(LttvTrapState *states, guint n)
1493 {
1494 guint i;
1495 LttvTrapState *retval;
1496
1497 retval = g_new(LttvTrapState, n);
1498
1499 for(i=0; i<n; i++) {
1500 retval[i].running = states[i].running;
1501 }
1502
1503 return retval;
1504 }
1505
1506 static void lttv_state_free_trap_states(LttvTrapState *states, guint n)
1507 {
1508 g_free(states);
1509 }
1510
1511 /* bdevstate stuff */
1512
1513 static LttvBdevState *get_hashed_bdevstate(LttvTraceState *ts, guint32 devcode)
1514 {
1515 gint devcode_gint = devcode;
1516 gpointer bdev = g_hash_table_lookup(ts->bdev_states, &devcode_gint);
1517 if(bdev == NULL) {
1518 LttvBdevState *bdevstate = g_new(LttvBdevState, 1);
1519 bdevstate->mode_stack = g_array_new(FALSE, FALSE, sizeof(GQuark));
1520
1521 gint * key = g_new(gint, 1);
1522 *key = devcode;
1523 g_hash_table_insert(ts->bdev_states, key, bdevstate);
1524
1525 bdev = bdevstate;
1526 }
1527
1528 return bdev;
1529 }
1530
1531 static LttvBdevState *bdevstate_new(void)
1532 {
1533 LttvBdevState *retval;
1534 retval = g_new(LttvBdevState, 1);
1535 retval->mode_stack = g_array_new(FALSE, FALSE, sizeof(GQuark));
1536
1537 return retval;
1538 }
1539
1540 static void bdevstate_free(LttvBdevState *bds)
1541 {
1542 g_array_free(bds->mode_stack, TRUE);
1543 g_free(bds);
1544 }
1545
1546 static void bdevstate_free_cb(gpointer key, gpointer value, gpointer user_data)
1547 {
1548 LttvBdevState *bds = (LttvBdevState *) value;
1549
1550 bdevstate_free(bds);
1551 }
1552
1553 static LttvBdevState *bdevstate_copy(LttvBdevState *bds)
1554 {
1555 LttvBdevState *retval;
1556
1557 retval = bdevstate_new();
1558 g_array_insert_vals(retval->mode_stack, 0, bds->mode_stack->data,
1559 bds->mode_stack->len);
1560
1561 return retval;
1562 }
1563
1564 static void insert_and_copy_bdev_state(gpointer k, gpointer v, gpointer u)
1565 {
1566 //GHashTable *ht = (GHashTable *)u;
1567 LttvBdevState *bds = (LttvBdevState *)v;
1568 LttvBdevState *newbds;
1569
1570 newbds = bdevstate_copy(bds);
1571
1572 g_hash_table_insert(u, k, newbds);
1573 }
1574
1575 static GHashTable *lttv_state_copy_blkdev_hashtable(GHashTable *ht)
1576 {
1577 GHashTable *retval;
1578
1579 retval = g_hash_table_new(g_int_hash, g_int_equal);
1580
1581 g_hash_table_foreach(ht, insert_and_copy_bdev_state, retval);
1582
1583 return retval;
1584 }
1585
1586 /* Free a hashtable and the LttvBdevState structures its values
1587 * point to. */
1588
1589 static void lttv_state_free_blkdev_hashtable(GHashTable *ht)
1590 {
1591 g_hash_table_foreach(ht, bdevstate_free_cb, NULL);
1592 g_hash_table_destroy(ht);
1593 }
1594
1595 /* The saved state for each trace contains a member "processes", which
1596 stores a copy of the process table, and a member "tracefiles" with
1597 one entry per tracefile. Each tracefile has a "process" member pointing
1598 to the current process and a "position" member storing the tracefile
1599 position (needed to seek to the current "next" event. */
1600
1601 static void state_save(LttvTraceState *self, LttvAttribute *container)
1602 {
1603 guint i, nb_tracefile, nb_cpus, nb_irqs, nb_soft_irqs, nb_traps;
1604
1605 LttvTracefileState *tfcs;
1606
1607 LttvAttribute *tracefiles_tree, *tracefile_tree;
1608
1609 guint *running_process;
1610
1611 LttvAttributeValue value;
1612
1613 LttEventPosition *ep;
1614
1615 tracefiles_tree = lttv_attribute_find_subdir(container,
1616 LTTV_STATE_TRACEFILES);
1617
1618 value = lttv_attribute_add(container, LTTV_STATE_PROCESSES,
1619 LTTV_POINTER);
1620 *(value.v_pointer) = lttv_state_copy_process_table(self->processes);
1621
1622 /* Add the currently running processes array */
1623 nb_cpus = ltt_trace_get_num_cpu(self->parent.t);
1624 running_process = g_new(guint, nb_cpus);
1625 for(i=0;i<nb_cpus;i++) {
1626 running_process[i] = self->running_process[i]->pid;
1627 }
1628 value = lttv_attribute_add(container, LTTV_STATE_RUNNING_PROCESS,
1629 LTTV_POINTER);
1630 *(value.v_pointer) = running_process;
1631
1632 g_info("State save");
1633
1634 nb_tracefile = self->parent.tracefiles->len;
1635
1636 for(i = 0 ; i < nb_tracefile ; i++) {
1637 tfcs =
1638 LTTV_TRACEFILE_STATE(g_array_index(self->parent.tracefiles,
1639 LttvTracefileContext*, i));
1640 tracefile_tree = g_object_new(LTTV_ATTRIBUTE_TYPE, NULL);
1641 value = lttv_attribute_add(tracefiles_tree, i,
1642 LTTV_GOBJECT);
1643 *(value.v_gobject) = (GObject *)tracefile_tree;
1644 #if 0
1645 value = lttv_attribute_add(tracefile_tree, LTTV_STATE_PROCESS,
1646 LTTV_UINT);
1647 *(value.v_uint) = tfcs->process->pid;
1648 #endif //0
1649 value = lttv_attribute_add(tracefile_tree, LTTV_STATE_EVENT,
1650 LTTV_POINTER);
1651 /* Only save the position if the tfs has not infinite time. */
1652 //if(!g_tree_lookup(self->parent.ts_context->pqueue, &tfcs->parent)
1653 // && current_tfcs != tfcs) {
1654 if(ltt_time_compare(tfcs->parent.timestamp, ltt_time_infinite) == 0) {
1655 *(value.v_pointer) = NULL;
1656 } else {
1657 LttEvent *e = ltt_tracefile_get_event(tfcs->parent.tf);
1658 ep = ltt_event_position_new();
1659 ltt_event_position(e, ep);
1660 *(value.v_pointer) = ep;
1661
1662 guint nb_block, offset;
1663 guint64 tsc;
1664 LttTracefile *tf;
1665 ltt_event_position_get(ep, &tf, &nb_block, &offset, &tsc);
1666 g_info("Block %u offset %u tsc %" PRIu64 " time %lu.%lu", nb_block,
1667 offset, tsc, tfcs->parent.timestamp.tv_sec,
1668 tfcs->parent.timestamp.tv_nsec);
1669 }
1670 }
1671
1672 /* save the cpu state */
1673 {
1674 value = lttv_attribute_add(container, LTTV_STATE_RESOURCE_CPUS_COUNT,
1675 LTTV_UINT);
1676 *(value.v_uint) = nb_cpus;
1677
1678 value = lttv_attribute_add(container, LTTV_STATE_RESOURCE_CPUS,
1679 LTTV_POINTER);
1680 *(value.v_pointer) = lttv_state_copy_cpu_states(self->cpu_states, nb_cpus);
1681 }
1682
1683 /* save the irq state */
1684 nb_irqs = self->name_tables->nb_irqs;
1685 {
1686 value = lttv_attribute_add(container, LTTV_STATE_RESOURCE_IRQS,
1687 LTTV_POINTER);
1688 *(value.v_pointer) = lttv_state_copy_irq_states(self->irq_states, nb_irqs);
1689 }
1690
1691 /* save the soft irq state */
1692 nb_soft_irqs = self->name_tables->nb_soft_irqs;
1693 {
1694 value = lttv_attribute_add(container, LTTV_STATE_RESOURCE_SOFT_IRQS,
1695 LTTV_POINTER);
1696 *(value.v_pointer) = lttv_state_copy_soft_irq_states(self->soft_irq_states, nb_soft_irqs);
1697 }
1698
1699 /* save the trap state */
1700 nb_traps = self->name_tables->nb_traps;
1701 {
1702 value = lttv_attribute_add(container, LTTV_STATE_RESOURCE_TRAPS,
1703 LTTV_POINTER);
1704 *(value.v_pointer) = lttv_state_copy_trap_states(self->trap_states, nb_traps);
1705 }
1706
1707 /* save the blkdev states */
1708 value = lttv_attribute_add(container, LTTV_STATE_RESOURCE_BLKDEVS,
1709 LTTV_POINTER);
1710 *(value.v_pointer) = lttv_state_copy_blkdev_hashtable(self->bdev_states);
1711 }
1712
1713
1714 static void state_restore(LttvTraceState *self, LttvAttribute *container)
1715 {
1716 guint i, nb_tracefile, pid, nb_cpus, nb_irqs, nb_soft_irqs, nb_traps;
1717
1718 LttvTracefileState *tfcs;
1719
1720 LttvAttribute *tracefiles_tree, *tracefile_tree;
1721
1722 guint *running_process;
1723
1724 LttvAttributeType type;
1725
1726 LttvAttributeValue value;
1727
1728 LttvAttributeName name;
1729
1730 gboolean is_named;
1731
1732 LttEventPosition *ep;
1733
1734 LttvTracesetContext *tsc = self->parent.ts_context;
1735 int retval;
1736
1737 tracefiles_tree = lttv_attribute_find_subdir(container,
1738 LTTV_STATE_TRACEFILES);
1739
1740 type = lttv_attribute_get_by_name(container, LTTV_STATE_PROCESSES,
1741 &value);
1742 g_assert(type == LTTV_POINTER);
1743 lttv_state_free_process_table(self->processes);
1744 self->processes = lttv_state_copy_process_table(*(value.v_pointer));
1745
1746 /* Add the currently running processes array */
1747 nb_cpus = ltt_trace_get_num_cpu(self->parent.t);
1748 type = lttv_attribute_get_by_name(container, LTTV_STATE_RUNNING_PROCESS,
1749 &value);
1750 g_assert(type == LTTV_POINTER);
1751 running_process = *(value.v_pointer);
1752 for(i=0;i<nb_cpus;i++) {
1753 pid = running_process[i];
1754 self->running_process[i] = lttv_state_find_process(self, i, pid);
1755 g_assert(self->running_process[i] != NULL);
1756 }
1757
1758 nb_tracefile = self->parent.tracefiles->len;
1759
1760 //g_tree_destroy(tsc->pqueue);
1761 //tsc->pqueue = g_tree_new(compare_tracefile);
1762
1763 /* restore cpu resource states */
1764 type = lttv_attribute_get_by_name(container, LTTV_STATE_RESOURCE_CPUS, &value);
1765 g_assert(type == LTTV_POINTER);
1766 lttv_state_free_cpu_states(self->cpu_states, nb_cpus);
1767 self->cpu_states = lttv_state_copy_cpu_states(*(value.v_pointer), nb_cpus);
1768
1769 /* restore irq resource states */
1770 nb_irqs = self->name_tables->nb_irqs;
1771 type = lttv_attribute_get_by_name(container, LTTV_STATE_RESOURCE_IRQS, &value);
1772 g_assert(type == LTTV_POINTER);
1773 lttv_state_free_irq_states(self->irq_states, nb_irqs);
1774 self->irq_states = lttv_state_copy_irq_states(*(value.v_pointer), nb_irqs);
1775
1776 /* restore soft irq resource states */
1777 nb_soft_irqs = self->name_tables->nb_soft_irqs;
1778 type = lttv_attribute_get_by_name(container, LTTV_STATE_RESOURCE_SOFT_IRQS, &value);
1779 g_assert(type == LTTV_POINTER);
1780 lttv_state_free_soft_irq_states(self->soft_irq_states, nb_soft_irqs);
1781 self->soft_irq_states = lttv_state_copy_soft_irq_states(*(value.v_pointer), nb_soft_irqs);
1782
1783 /* restore trap resource states */
1784 nb_traps = self->name_tables->nb_traps;
1785 type = lttv_attribute_get_by_name(container, LTTV_STATE_RESOURCE_TRAPS, &value);
1786 g_assert(type == LTTV_POINTER);
1787 lttv_state_free_trap_states(self->trap_states, nb_traps);
1788 self->trap_states = lttv_state_copy_trap_states(*(value.v_pointer), nb_traps);
1789
1790 /* restore the blkdev states */
1791 type = lttv_attribute_get_by_name(container, LTTV_STATE_RESOURCE_BLKDEVS, &value);
1792 g_assert(type == LTTV_POINTER);
1793 lttv_state_free_blkdev_hashtable(self->bdev_states);
1794 self->bdev_states = lttv_state_copy_blkdev_hashtable(*(value.v_pointer));
1795
1796 for(i = 0 ; i < nb_tracefile ; i++) {
1797 tfcs =
1798 LTTV_TRACEFILE_STATE(g_array_index(self->parent.tracefiles,
1799 LttvTracefileContext*, i));
1800 type = lttv_attribute_get(tracefiles_tree, i, &name, &value, &is_named);
1801 g_assert(type == LTTV_GOBJECT);
1802 tracefile_tree = *((LttvAttribute **)(value.v_gobject));
1803 #if 0
1804 type = lttv_attribute_get_by_name(tracefile_tree, LTTV_STATE_PROCESS,
1805 &value);
1806 g_assert(type == LTTV_UINT);
1807 pid = *(value.v_uint);
1808 tfcs->process = lttv_state_find_process_or_create(tfcs, pid);
1809 #endif //0
1810 type = lttv_attribute_get_by_name(tracefile_tree, LTTV_STATE_EVENT,
1811 &value);
1812 g_assert(type == LTTV_POINTER);
1813 //g_assert(*(value.v_pointer) != NULL);
1814 ep = *(value.v_pointer);
1815 g_assert(tfcs->parent.t_context != NULL);
1816
1817 tfcs->cpu_state = &self->cpu_states[tfcs->cpu];
1818
1819 LttvTracefileContext *tfc = LTTV_TRACEFILE_CONTEXT(tfcs);
1820 g_tree_remove(tsc->pqueue, tfc);
1821
1822 if(ep != NULL) {
1823 retval= ltt_tracefile_seek_position(tfc->tf, ep);
1824 g_assert_cmpint(retval, ==, 0);
1825 tfc->timestamp = ltt_event_time(ltt_tracefile_get_event(tfc->tf));
1826 g_assert_cmpint(ltt_time_compare(tfc->timestamp, ltt_time_infinite),
1827 !=, 0);
1828 g_tree_insert(tsc->pqueue, tfc, tfc);
1829 g_info("Restoring state for a tf at time %lu.%lu",
1830 tfc->timestamp.tv_sec, tfc->timestamp.tv_nsec);
1831 } else {
1832 tfc->timestamp = ltt_time_infinite;
1833 }
1834 }
1835 }
1836
1837
1838 static void state_saved_free(LttvTraceState *self, LttvAttribute *container)
1839 {
1840 guint i, nb_tracefile, nb_cpus, nb_irqs, nb_soft_irqs;
1841
1842 LttvAttribute *tracefiles_tree, *tracefile_tree;
1843
1844 guint *running_process;
1845
1846 LttvAttributeType type;
1847
1848 LttvAttributeValue value;
1849
1850 LttvAttributeName name;
1851
1852 gboolean is_named;
1853
1854 tracefiles_tree = lttv_attribute_find_subdir(container,
1855 LTTV_STATE_TRACEFILES);
1856 g_object_ref(G_OBJECT(tracefiles_tree));
1857 lttv_attribute_remove_by_name(container, LTTV_STATE_TRACEFILES);
1858
1859 type = lttv_attribute_get_by_name(container, LTTV_STATE_PROCESSES,
1860 &value);
1861 g_assert(type == LTTV_POINTER);
1862 lttv_state_free_process_table(*(value.v_pointer));
1863 *(value.v_pointer) = NULL;
1864 lttv_attribute_remove_by_name(container, LTTV_STATE_PROCESSES);
1865
1866 /* Free running processes array */
1867 type = lttv_attribute_get_by_name(container, LTTV_STATE_RUNNING_PROCESS,
1868 &value);
1869 g_assert(type == LTTV_POINTER);
1870 running_process = *(value.v_pointer);
1871 g_free(running_process);
1872
1873 /* free cpu resource states */
1874 type = lttv_attribute_get_by_name(container, LTTV_STATE_RESOURCE_CPUS_COUNT, &value);
1875 g_assert(type == LTTV_UINT);
1876 nb_cpus = *value.v_uint;
1877 type = lttv_attribute_get_by_name(container, LTTV_STATE_RESOURCE_CPUS, &value);
1878 g_assert(type == LTTV_POINTER);
1879 lttv_state_free_cpu_states(*(value.v_pointer), nb_cpus);
1880
1881 /* free irq resource states */
1882 nb_irqs = self->name_tables->nb_irqs;
1883 type = lttv_attribute_get_by_name(container, LTTV_STATE_RESOURCE_IRQS, &value);
1884 g_assert(type == LTTV_POINTER);
1885 lttv_state_free_irq_states(*(value.v_pointer), nb_irqs);
1886
1887 /* free softirq resource states */
1888 nb_soft_irqs = self->name_tables->nb_soft_irqs;
1889 type = lttv_attribute_get_by_name(container, LTTV_STATE_RESOURCE_SOFT_IRQS, &value);
1890 g_assert(type == LTTV_POINTER);
1891 lttv_state_free_soft_irq_states(*(value.v_pointer), nb_soft_irqs);
1892
1893 /* free the blkdev states */
1894 type = lttv_attribute_get_by_name(container, LTTV_STATE_RESOURCE_BLKDEVS, &value);
1895 g_assert(type == LTTV_POINTER);
1896 lttv_state_free_blkdev_hashtable(*(value.v_pointer));
1897
1898 nb_tracefile = self->parent.tracefiles->len;
1899
1900 for(i = 0 ; i < nb_tracefile ; i++) {
1901
1902 type = lttv_attribute_get(tracefiles_tree, i, &name, &value, &is_named);
1903 g_assert(type == LTTV_GOBJECT);
1904 tracefile_tree = *((LttvAttribute **)(value.v_gobject));
1905
1906 type = lttv_attribute_get_by_name(tracefile_tree, LTTV_STATE_EVENT,
1907 &value);
1908 g_assert(type == LTTV_POINTER);
1909 if(*(value.v_pointer) != NULL) g_free(*(value.v_pointer));
1910 }
1911 g_object_unref(G_OBJECT(tracefiles_tree));
1912 }
1913
1914
1915 static void free_saved_state(LttvTraceState *self)
1916 {
1917 guint i, nb;
1918
1919 LttvAttributeType type;
1920
1921 LttvAttributeValue value;
1922
1923 LttvAttributeName name;
1924
1925 gboolean is_named;
1926
1927 LttvAttribute *saved_states;
1928
1929 saved_states = lttv_attribute_find_subdir(self->parent.t_a,
1930 LTTV_STATE_SAVED_STATES);
1931
1932 nb = lttv_attribute_get_number(saved_states);
1933 for(i = 0 ; i < nb ; i++) {
1934 type = lttv_attribute_get(saved_states, i, &name, &value, &is_named);
1935 g_assert(type == LTTV_GOBJECT);
1936 state_saved_free(self, *((LttvAttribute **)value.v_gobject));
1937 }
1938
1939 lttv_attribute_remove_by_name(self->parent.t_a, LTTV_STATE_SAVED_STATES);
1940 }
1941
1942
1943 static void create_max_time(LttvTraceState *tcs)
1944 {
1945 LttvAttributeValue v;
1946
1947 lttv_attribute_find(tcs->parent.t_a, LTTV_STATE_SAVED_STATES_TIME,
1948 LTTV_POINTER, &v);
1949 g_assert(*(v.v_pointer) == NULL);
1950 *(v.v_pointer) = g_new(LttTime,1);
1951 *((LttTime *)*(v.v_pointer)) = ltt_time_zero;
1952 }
1953
1954
1955 static void get_max_time(LttvTraceState *tcs)
1956 {
1957 LttvAttributeValue v;
1958
1959 lttv_attribute_find(tcs->parent.t_a, LTTV_STATE_SAVED_STATES_TIME,
1960 LTTV_POINTER, &v);
1961 g_assert(*(v.v_pointer) != NULL);
1962 tcs->max_time_state_recomputed_in_seek = (LttTime *)*(v.v_pointer);
1963 }
1964
1965
1966 static void free_max_time(LttvTraceState *tcs)
1967 {
1968 LttvAttributeValue v;
1969
1970 lttv_attribute_find(tcs->parent.t_a, LTTV_STATE_SAVED_STATES_TIME,
1971 LTTV_POINTER, &v);
1972 g_free(*(v.v_pointer));
1973 *(v.v_pointer) = NULL;
1974 }
1975
1976 static void create_name_tables(LttvTraceState *tcs)
1977 {
1978 int i;
1979
1980 GString *fe_name = g_string_new("");
1981
1982 LttvNameTables *name_tables = g_new(LttvNameTables, 1);
1983
1984 LttvAttributeValue v;
1985
1986 GArray *hooks;
1987
1988 lttv_attribute_find(tcs->parent.t_a, LTTV_STATE_NAME_TABLES,
1989 LTTV_POINTER, &v);
1990 g_assert(*(v.v_pointer) == NULL);
1991 *(v.v_pointer) = name_tables;
1992
1993 hooks = g_array_sized_new(FALSE, FALSE, sizeof(LttvTraceHook), 1);
1994
1995 if(!lttv_trace_find_hook(tcs->parent.t,
1996 LTT_CHANNEL_KERNEL,
1997 LTT_EVENT_SYSCALL_ENTRY,
1998 FIELD_ARRAY(LTT_FIELD_SYSCALL_ID),
1999 NULL, NULL, &hooks)) {
2000
2001 // th = lttv_trace_hook_get_first(&th);
2002 //
2003 // t = ltt_field_type(lttv_trace_get_hook_field(th, 0));
2004 // nb = ltt_type_element_number(t);
2005 //
2006 // name_tables->syscall_names = g_new(GQuark, nb);
2007 // name_tables->nb_syscalls = nb;
2008 //
2009 // for(i = 0 ; i < nb ; i++) {
2010 // name_tables->syscall_names[i] = ltt_enum_string_get(t, i);
2011 // if(!name_tables->syscall_names[i]) {
2012 // GString *string = g_string_new("");
2013 // g_string_printf(string, "syscall %u", i);
2014 // name_tables->syscall_names[i] = g_quark_from_string(string->str);
2015 // g_string_free(string, TRUE);
2016 // }
2017 // }
2018
2019 name_tables->nb_syscalls = PREALLOC_NB_SYSCALLS;
2020 name_tables->syscall_names = g_new(GQuark, name_tables->nb_syscalls);
2021 for(i = 0 ; i < name_tables->nb_syscalls; i++) {
2022 g_string_printf(fe_name, "syscall %d", i);
2023 name_tables->syscall_names[i] = g_quark_from_string(fe_name->str);
2024 }
2025 } else {
2026 name_tables->syscall_names = NULL;
2027 name_tables->nb_syscalls = 0;
2028 }
2029 lttv_trace_hook_remove_all(&hooks);
2030
2031 if(!lttv_trace_find_hook(tcs->parent.t,
2032 LTT_CHANNEL_KERNEL,
2033 LTT_EVENT_TRAP_ENTRY,
2034 FIELD_ARRAY(LTT_FIELD_TRAP_ID),
2035 NULL, NULL, &hooks) ||
2036 !lttv_trace_find_hook(tcs->parent.t,
2037 LTT_CHANNEL_KERNEL,
2038 LTT_EVENT_PAGE_FAULT_ENTRY,
2039 FIELD_ARRAY(LTT_FIELD_TRAP_ID),
2040 NULL, NULL, &hooks)) {
2041
2042 // th = lttv_trace_hook_get_first(&th);
2043 //
2044 // t = ltt_field_type(lttv_trace_get_hook_field(th, 0));
2045 // //nb = ltt_type_element_number(t);
2046 //
2047 // name_tables->trap_names = g_new(GQuark, nb);
2048 // for(i = 0 ; i < nb ; i++) {
2049 // name_tables->trap_names[i] = g_quark_from_string(
2050 // ltt_enum_string_get(t, i));
2051 // }
2052
2053 name_tables->nb_traps = PREALLOC_NB_TRAPS;
2054 name_tables->trap_names = g_new(GQuark, name_tables->nb_traps);
2055 for(i = 0 ; i < name_tables->nb_traps; i++) {
2056 g_string_printf(fe_name, "trap %d", i);
2057 name_tables->trap_names[i] = g_quark_from_string(fe_name->str);
2058 }
2059 } else {
2060 name_tables->trap_names = NULL;
2061 name_tables->nb_traps = 0;
2062 }
2063 lttv_trace_hook_remove_all(&hooks);
2064
2065 if(!lttv_trace_find_hook(tcs->parent.t,
2066 LTT_CHANNEL_KERNEL,
2067 LTT_EVENT_IRQ_ENTRY,
2068 FIELD_ARRAY(LTT_FIELD_IRQ_ID),
2069 NULL, NULL, &hooks)) {
2070
2071 /*
2072 name_tables->irq_names = g_new(GQuark, nb);
2073 for(i = 0 ; i < nb ; i++) {
2074 name_tables->irq_names[i] = g_quark_from_string(ltt_enum_string_get(t, i));
2075 }
2076 */
2077 /* FIXME: LttvIRQState *irq_states should become a g_array */
2078
2079 name_tables->nb_irqs = PREALLOC_NB_IRQS;
2080 name_tables->irq_names = g_new(GQuark, name_tables->nb_irqs);
2081 for(i = 0 ; i < name_tables->nb_irqs; i++) {
2082 g_string_printf(fe_name, "irq %d", i);
2083 name_tables->irq_names[i] = g_quark_from_string(fe_name->str);
2084 }
2085 } else {
2086 name_tables->nb_irqs = 0;
2087 name_tables->irq_names = NULL;
2088 }
2089 lttv_trace_hook_remove_all(&hooks);
2090 /*
2091 name_tables->soft_irq_names = g_new(GQuark, nb);
2092 for(i = 0 ; i < nb ; i++) {
2093 name_tables->soft_irq_names[i] = g_quark_from_string(ltt_enum_string_get(t, i));
2094 }
2095 */
2096
2097 name_tables->nb_soft_irqs = PREALLOC_NB_SOFT_IRQS;
2098 name_tables->soft_irq_names = g_new(GQuark, name_tables->nb_soft_irqs);
2099 for(i = 0 ; i < name_tables->nb_soft_irqs ; i++) {
2100 g_string_printf(fe_name, "softirq %d", i);
2101 name_tables->soft_irq_names[i] = g_quark_from_string(fe_name->str);
2102 }
2103 g_array_free(hooks, TRUE);
2104
2105 g_string_free(fe_name, TRUE);
2106
2107 #if (__WORDSIZE == 32)
2108 name_tables->kprobe_hash = g_hash_table_new_full(guint64_hash, guint64_equal,
2109 g_free, NULL);
2110 #else
2111 name_tables->kprobe_hash = g_hash_table_new(g_direct_hash, g_direct_equal);
2112 #endif
2113 }
2114
2115
2116 static void get_name_tables(LttvTraceState *tcs)
2117 {
2118 LttvAttributeValue v;
2119
2120 lttv_attribute_find(tcs->parent.t_a, LTTV_STATE_NAME_TABLES,
2121 LTTV_POINTER, &v);
2122 g_assert(*(v.v_pointer) != NULL);
2123 tcs->name_tables = (LttvNameTables *)*(v.v_pointer);
2124 }
2125
2126
2127 static void free_name_tables(LttvTraceState *tcs)
2128 {
2129 LttvNameTables *name_tables;
2130
2131 LttvAttributeValue v;
2132
2133 lttv_attribute_find(tcs->parent.t_a, LTTV_STATE_NAME_TABLES,
2134 LTTV_POINTER, &v);
2135 name_tables = (LttvNameTables *)*(v.v_pointer);
2136 *(v.v_pointer) = NULL;
2137
2138 // g_free(name_tables->eventtype_names);
2139 if(name_tables->syscall_names) g_free(name_tables->syscall_names);
2140 if(name_tables->trap_names) g_free(name_tables->trap_names);
2141 if(name_tables->irq_names) g_free(name_tables->irq_names);
2142 if(name_tables->soft_irq_names) g_free(name_tables->soft_irq_names);
2143 g_hash_table_destroy(name_tables->kprobe_hash);
2144 g_free(name_tables);
2145 }
2146
2147 #ifdef HASH_TABLE_DEBUG
2148
2149 static void test_process(gpointer key, gpointer value, gpointer user_data)
2150 {
2151 LttvProcessState *process = (LttvProcessState *)value;
2152
2153 /* Test for process corruption */
2154 guint stack_len = process->execution_stack->len;
2155 }
2156
2157 static void hash_table_check(GHashTable *table)
2158 {
2159 g_hash_table_foreach(table, test_process, NULL);
2160 }
2161
2162
2163 #endif
2164
2165 /* clears the stack and sets the state passed as argument */
2166 static void cpu_set_base_mode(LttvCPUState *cpust, LttvCPUMode state)
2167 {
2168 g_array_set_size(cpust->mode_stack, 1);
2169 ((GQuark *)cpust->mode_stack->data)[0] = state;
2170 }
2171
2172 static void cpu_push_mode(LttvCPUState *cpust, LttvCPUMode state)
2173 {
2174 g_array_set_size(cpust->mode_stack, cpust->mode_stack->len + 1);
2175 ((GQuark *)cpust->mode_stack->data)[cpust->mode_stack->len - 1] = state;
2176 }
2177
2178 static void cpu_pop_mode(LttvCPUState *cpust)
2179 {
2180 if(cpust->mode_stack->len <= 1)
2181 cpu_set_base_mode(cpust, LTTV_CPU_UNKNOWN);
2182 else
2183 g_array_set_size(cpust->mode_stack, cpust->mode_stack->len - 1);
2184 }
2185
2186 /* clears the stack and sets the state passed as argument */
2187 static void bdev_set_base_mode(LttvBdevState *bdevst, LttvBdevMode state)
2188 {
2189 g_array_set_size(bdevst->mode_stack, 1);
2190 ((GQuark *)bdevst->mode_stack->data)[0] = state;
2191 }
2192
2193 static void bdev_push_mode(LttvBdevState *bdevst, LttvBdevMode state)
2194 {
2195 g_array_set_size(bdevst->mode_stack, bdevst->mode_stack->len + 1);
2196 ((GQuark *)bdevst->mode_stack->data)[bdevst->mode_stack->len - 1] = state;
2197 }
2198
2199 static void bdev_pop_mode(LttvBdevState *bdevst)
2200 {
2201 if(bdevst->mode_stack->len <= 1)
2202 bdev_set_base_mode(bdevst, LTTV_BDEV_UNKNOWN);
2203 else
2204 g_array_set_size(bdevst->mode_stack, bdevst->mode_stack->len - 1);
2205 }
2206
2207 static void irq_set_base_mode(LttvIRQState *irqst, LttvIRQMode state)
2208 {
2209 g_array_set_size(irqst->mode_stack, 1);
2210 ((GQuark *)irqst->mode_stack->data)[0] = state;
2211 }
2212
2213 static void irq_push_mode(LttvIRQState *irqst, LttvIRQMode state)
2214 {
2215 g_array_set_size(irqst->mode_stack, irqst->mode_stack->len + 1);
2216 ((GQuark *)irqst->mode_stack->data)[irqst->mode_stack->len - 1] = state;
2217 }
2218
2219 static void irq_pop_mode(LttvIRQState *irqst)
2220 {
2221 if(irqst->mode_stack->len <= 1)
2222 irq_set_base_mode(irqst, LTTV_IRQ_UNKNOWN);
2223 else
2224 g_array_set_size(irqst->mode_stack, irqst->mode_stack->len - 1);
2225 }
2226
2227 static void push_state(LttvTracefileState *tfs, LttvExecutionMode t,
2228 guint state_id)
2229 {
2230 LttvExecutionState *es;
2231
2232 LttvTraceState *ts = (LttvTraceState*)tfs->parent.t_context;
2233 guint cpu = tfs->cpu;
2234
2235 #ifdef HASH_TABLE_DEBUG
2236 hash_table_check(ts->processes);
2237 #endif
2238 LttvProcessState *process = ts->running_process[cpu];
2239
2240 guint depth = process->execution_stack->len;
2241
2242 process->execution_stack =
2243 g_array_set_size(process->execution_stack, depth + 1);
2244 /* Keep in sync */
2245 process->state =
2246 &g_array_index(process->execution_stack, LttvExecutionState, depth - 1);
2247
2248 es = &g_array_index(process->execution_stack, LttvExecutionState, depth);
2249 es->t = t;
2250 es->n = state_id;
2251 es->entry = es->change = tfs->parent.timestamp;
2252 es->cum_cpu_time = ltt_time_zero;
2253 es->s = process->state->s;
2254 process->state = es;
2255 }
2256
2257 /* pop state
2258 * return 1 when empty, else 0 */
2259 int
2260 lttv_state_pop_state_cleanup(LttvProcessState *process, LttvTracefileState *tfs)
2261 {
2262 guint depth = process->execution_stack->len;
2263
2264 if(depth == 1){
2265 return 1;
2266 }
2267
2268 process->execution_stack =
2269 g_array_set_size(process->execution_stack, depth - 1);
2270 process->state = &g_array_index(process->execution_stack, LttvExecutionState,
2271 depth - 2);
2272 process->state->change = tfs->parent.timestamp;
2273
2274 return 0;
2275 }
2276
2277 static void pop_state(LttvTracefileState *tfs, LttvExecutionMode t)
2278 {
2279 guint cpu = tfs->cpu;
2280 LttvTraceState *ts = (LttvTraceState*)tfs->parent.t_context;
2281 LttvProcessState *process = ts->running_process[cpu];
2282
2283 guint depth = process->execution_stack->len;
2284
2285 if(process->state->t != t){
2286 g_info("Different execution mode type (%lu.%09lu): ignore it\n",
2287 tfs->parent.timestamp.tv_sec, tfs->parent.timestamp.tv_nsec);
2288 g_info("process state has %s when pop_int is %s\n",
2289 g_quark_to_string(process->state->t),
2290 g_quark_to_string(t));
2291 g_info("{ %u, %u, %s, %s, %s }\n",
2292 process->pid,
2293 process->ppid,
2294 g_quark_to_string(process->name),
2295 g_quark_to_string(process->brand),
2296 g_quark_to_string(process->state->s));
2297 return;
2298 }
2299
2300 if(depth == 1){
2301 g_info("Trying to pop last state on stack (%lu.%09lu): ignore it\n",
2302 tfs->parent.timestamp.tv_sec, tfs->parent.timestamp.tv_nsec);
2303 return;
2304 }
2305
2306 process->execution_stack =
2307 g_array_set_size(process->execution_stack, depth - 1);
2308 process->state = &g_array_index(process->execution_stack, LttvExecutionState,
2309 depth - 2);
2310 process->state->change = tfs->parent.timestamp;
2311 }
2312
2313 struct search_result {
2314 const LttTime *time; /* Requested time */
2315 LttTime *best; /* Best result */
2316 };
2317
2318 static gint search_usertrace(gconstpointer a, gconstpointer b)
2319 {
2320 const LttTime *elem_time = (const LttTime*)a;
2321 /* Explicit non const cast */
2322 struct search_result *res = (struct search_result *)b;
2323
2324 if(ltt_time_compare(*elem_time, *(res->time)) < 0) {
2325 /* The usertrace was created before the schedchange */
2326 /* Get larger keys */
2327 return 1;
2328 } else if(ltt_time_compare(*elem_time, *(res->time)) >= 0) {
2329 /* The usertrace was created after the schedchange time */
2330 /* Get smaller keys */
2331 if(res->best) {
2332 if(ltt_time_compare(*elem_time, *res->best) < 0) {
2333 res->best = (LttTime *)elem_time;
2334 }
2335 } else {
2336 res->best = (LttTime *)elem_time;
2337 }
2338 return -1;
2339 }
2340 return 0;
2341 }
2342
2343 static LttvTracefileState *ltt_state_usertrace_find(LttvTraceState *tcs,
2344 guint pid, const LttTime *timestamp)
2345 {
2346 LttvTracefileState *tfs = NULL;
2347 struct search_result res;
2348 /* Find the usertrace associated with a pid and time interval.
2349 * Search in the usertraces by PID (within a hash) and then, for each
2350 * corresponding element of the array, find the first one with creation
2351 * timestamp the lowest, but higher or equal to "timestamp". */
2352 res.time = timestamp;
2353 res.best = NULL;
2354 GTree *usertrace_tree = g_hash_table_lookup(tcs->usertraces,
2355 GUINT_TO_POINTER(pid));
2356 if(usertrace_tree) {
2357 g_tree_search(usertrace_tree, search_usertrace, &res);
2358 if(res.best)
2359 tfs = g_tree_lookup(usertrace_tree, res.best);
2360 }
2361
2362 return tfs;
2363 }
2364
2365 /* Return a new and initialized LttvProcessState structure */
2366
2367 LttvProcessState *lttv_state_create_process(LttvTraceState *tcs,
2368 LttvProcessState *parent, guint cpu, guint pid,
2369 guint tgid, GQuark name, const LttTime *timestamp)
2370 {
2371 LttvProcessState *process = g_new(LttvProcessState, 1);
2372
2373 LttvExecutionState *es;
2374
2375 char buffer[128];
2376
2377 process->pid = pid;
2378 process->tgid = tgid;
2379 process->cpu = cpu;
2380 process->name = name;
2381 process->brand = LTTV_STATE_UNBRANDED;
2382 //process->last_cpu = tfs->cpu_name;
2383 //process->last_cpu_index = ltt_tracefile_num(((LttvTracefileContext*)tfs)->tf);
2384 process->type = LTTV_STATE_USER_THREAD;
2385 process->usertrace = ltt_state_usertrace_find(tcs, pid, timestamp);
2386 process->current_function = 0; //function 0x0 by default.
2387
2388 g_info("Process %u, core %p", process->pid, process);
2389 g_hash_table_insert(tcs->processes, process, process);
2390
2391 if(parent) {
2392 process->ppid = parent->pid;
2393 process->creation_time = *timestamp;
2394 }
2395
2396 /* No parent. This process exists but we are missing all information about
2397 its creation. The birth time is set to zero but we remember the time of
2398 insertion */
2399
2400 else {
2401 process->ppid = 0;
2402 process->creation_time = ltt_time_zero;
2403 }
2404
2405 process->insertion_time = *timestamp;
2406 sprintf(buffer,"%d-%lu.%lu",pid, process->creation_time.tv_sec,
2407 process->creation_time.tv_nsec);
2408 process->pid_time = g_quark_from_string(buffer);
2409 process->cpu = cpu;
2410 process->free_events = 0;
2411 //process->last_cpu = tfs->cpu_name;
2412 //process->last_cpu_index = ltt_tracefile_num(((LttvTracefileContext*)tfs)->tf);
2413 process->execution_stack = g_array_sized_new(FALSE, FALSE,
2414 sizeof(LttvExecutionState), PREALLOCATED_EXECUTION_STACK);
2415 process->execution_stack = g_array_set_size(process->execution_stack, 2);
2416 es = process->state = &g_array_index(process->execution_stack,
2417 LttvExecutionState, 0);
2418 es->t = LTTV_STATE_USER_MODE;
2419 es->n = LTTV_STATE_SUBMODE_NONE;
2420 es->entry = *timestamp;
2421 //g_assert(timestamp->tv_sec != 0);
2422 es->change = *timestamp;
2423 es->cum_cpu_time = ltt_time_zero;
2424 es->s = LTTV_STATE_RUN;
2425
2426 es = process->state = &g_array_index(process->execution_stack,
2427 LttvExecutionState, 1);
2428 es->t = LTTV_STATE_SYSCALL;
2429 es->n = LTTV_STATE_SUBMODE_NONE;
2430 es->entry = *timestamp;
2431 //g_assert(timestamp->tv_sec != 0);
2432 es->change = *timestamp;
2433 es->cum_cpu_time = ltt_time_zero;
2434 es->s = LTTV_STATE_WAIT_FORK;
2435
2436 /* Allocate an empty function call stack. If it's empty, use 0x0. */
2437 process->user_stack = g_array_sized_new(FALSE, FALSE,
2438 sizeof(guint64), 0);
2439
2440 process->fds = g_hash_table_new(g_direct_hash, g_direct_equal);
2441
2442 return process;
2443 }
2444
2445 LttvProcessState *
2446 lttv_state_find_process(LttvTraceState *ts, guint cpu, guint pid)
2447 {
2448 LttvProcessState key;
2449 LttvProcessState *process;
2450
2451 key.pid = pid;
2452 key.cpu = cpu;
2453 process = g_hash_table_lookup(ts->processes, &key);
2454 return process;
2455 }
2456
2457 LttvProcessState *lttv_state_find_process_or_create(LttvTraceState *ts,
2458 guint cpu, guint pid, const LttTime *timestamp)
2459 {
2460 LttvProcessState *process = lttv_state_find_process(ts, cpu, pid);
2461 LttvExecutionState *es;
2462
2463 /* Put ltt_time_zero creation time for unexisting processes */
2464 if(unlikely(process == NULL)) {
2465 process = lttv_state_create_process(ts,
2466 NULL, cpu, pid, 0, LTTV_STATE_UNNAMED, timestamp);
2467 /* We are not sure is it's a kernel thread or normal thread, put the
2468 * bottom stack state to unknown */
2469 process->execution_stack =
2470 g_array_set_size(process->execution_stack, 1);
2471 process->state = es =
2472 &g_array_index(process->execution_stack, LttvExecutionState, 0);
2473 es->t = LTTV_STATE_MODE_UNKNOWN;
2474 es->s = LTTV_STATE_UNNAMED;
2475 }
2476 return process;
2477 }
2478
2479 /* FIXME : this function should be called when we receive an event telling that
2480 * release_task has been called in the kernel. In happens generally when
2481 * the parent waits for its child termination, but may also happens in special
2482 * cases in the child's exit : when the parent ignores its children SIGCCHLD or
2483 * has the flag SA_NOCLDWAIT. It can also happen when the child is part
2484 * of a killed thread group, but isn't the leader.
2485 */
2486 static int exit_process(LttvTracefileState *tfs, LttvProcessState *process)
2487 {
2488 LttvTraceState *ts = LTTV_TRACE_STATE(tfs->parent.t_context);
2489 LttvProcessState key;
2490
2491 /* Wait for both schedule with exit dead and process free to happen.
2492 * They can happen in any order. */
2493 if (++(process->free_events) < 2)
2494 return 0;
2495
2496 key.pid = process->pid;
2497 key.cpu = process->cpu;
2498 g_hash_table_remove(ts->processes, &key);
2499 g_array_free(process->execution_stack, TRUE);
2500 g_array_free(process->user_stack, TRUE);
2501
2502 /* the following also clears the content */
2503 g_hash_table_destroy(process->fds);
2504
2505 g_free(process);
2506 return 1;
2507 }
2508
2509
2510 static void free_process_state(gpointer key, gpointer value,gpointer user_data)
2511 {
2512 g_array_free(((LttvProcessState *)value)->execution_stack, TRUE);
2513 g_array_free(((LttvProcessState *)value)->user_stack, TRUE);
2514
2515 /* the following also clears the content */
2516 g_hash_table_destroy(((LttvProcessState *)value)->fds);
2517
2518 g_free(value);
2519 }
2520
2521
2522 static void lttv_state_free_process_table(GHashTable *processes)
2523 {
2524 g_hash_table_foreach(processes, free_process_state, NULL);
2525 g_hash_table_destroy(processes);
2526 }
2527
2528
2529 static gboolean syscall_entry(void *hook_data, void *call_data)
2530 {
2531 LttvTracefileState *s = (LttvTracefileState *)call_data;
2532 guint cpu = s->cpu;
2533 LttvTraceState *ts = (LttvTraceState*)s->parent.t_context;
2534 LttvProcessState *process = ts->running_process[cpu];
2535 LttEvent *e = ltt_tracefile_get_event(s->parent.tf);
2536 LttvTraceHook *th = (LttvTraceHook *)hook_data;
2537 struct marker_field *f = lttv_trace_get_hook_field(th, 0);
2538 LttvExecutionSubmode submode;
2539 LttvNameTables *nt = ((LttvTraceState *)(s->parent.t_context))->name_tables;
2540
2541 guint syscall = ltt_event_get_unsigned(e, f);
2542 expand_syscall_table(ts, syscall);
2543 submode = nt->syscall_names[syscall];
2544 /* There can be no system call from PID 0 : unknown state */
2545 if(process->pid != 0)
2546 push_state(s, LTTV_STATE_SYSCALL, submode);
2547 return FALSE;
2548 }
2549
2550
2551 static gboolean syscall_exit(void *hook_data, void *call_data)
2552 {
2553 LttvTracefileState *s = (LttvTracefileState *)call_data;
2554 guint cpu = s->cpu;
2555 LttvTraceState *ts = (LttvTraceState*)s->parent.t_context;
2556 LttvProcessState *process = ts->running_process[cpu];
2557
2558 /* There can be no system call from PID 0 : unknown state */
2559 if(process->pid != 0)
2560 pop_state(s, LTTV_STATE_SYSCALL);
2561 return FALSE;
2562 }
2563
2564
2565 static gboolean trap_entry(void *hook_data, void *call_data)
2566 {
2567 LttvTracefileState *s = (LttvTracefileState *)call_data;
2568 LttvTraceState *ts = (LttvTraceState *)s->parent.t_context;
2569 LttEvent *e = ltt_tracefile_get_event(s->parent.tf);
2570 LttvTraceHook *th = (LttvTraceHook *)hook_data;
2571 struct marker_field *f = lttv_trace_get_hook_field(th, 0);
2572 LttvNameTables *nt = ((LttvTraceState *)(s->parent.t_context))->name_tables;
2573
2574 LttvExecutionSubmode submode;
2575
2576 guint64 trap = ltt_event_get_long_unsigned(e, f);
2577
2578 expand_trap_table(ts, trap);
2579
2580 submode = nt->trap_names[trap];
2581
2582 push_state(s, LTTV_STATE_TRAP, submode);
2583
2584 /* update cpu status */
2585 cpu_push_mode(s->cpu_state, LTTV_CPU_TRAP);
2586
2587 /* update trap status */
2588 g_array_append_val(s->cpu_state->trap_stack, trap);
2589 ts->trap_states[trap].running++;
2590
2591 return FALSE;
2592 }
2593
2594 static gboolean trap_exit(void *hook_data, void *call_data)
2595 {
2596 LttvTracefileState *s = (LttvTracefileState *)call_data;
2597 LttvTraceState *ts = (LttvTraceState *)s->parent.t_context;
2598
2599 pop_state(s, LTTV_STATE_TRAP);
2600
2601 /* update cpu status */
2602 cpu_pop_mode(s->cpu_state);
2603
2604 /* update trap status */
2605 if (s->cpu_state->trap_stack->len > 0) {
2606 gint last = g_array_index(s->cpu_state->trap_stack, gint,
2607 s->cpu_state->trap_stack->len-1);
2608 if(ts->trap_states[last].running)
2609 ts->trap_states[last].running--;
2610 g_array_remove_index(s->cpu_state->trap_stack,
2611 s->cpu_state->trap_stack->len-1);
2612 }
2613 return FALSE;
2614 }
2615
2616 static gboolean irq_entry(void *hook_data, void *call_data)
2617 {
2618 LttvTracefileState *s = (LttvTracefileState *)call_data;
2619 LttvTraceState *ts = (LttvTraceState *)s->parent.t_context;
2620 LttEvent *e = ltt_tracefile_get_event(s->parent.tf);
2621 //guint8 ev_id = ltt_event_eventtype_id(e);
2622 LttvTraceHook *th = (LttvTraceHook *)hook_data;
2623 struct marker_field *f = lttv_trace_get_hook_field(th, 0);
2624 LttvNameTables *nt = ((LttvTraceState *)(s->parent.t_context))->name_tables;
2625
2626 LttvExecutionSubmode submode;
2627 guint64 irq = ltt_event_get_long_unsigned(e, f);
2628
2629 expand_irq_table(ts, irq);
2630
2631 submode = nt->irq_names[irq];
2632
2633 /* Do something with the info about being in user or system mode when int? */
2634 push_state(s, LTTV_STATE_IRQ, submode);
2635
2636 /* update cpu status */
2637 cpu_push_mode(s->cpu_state, LTTV_CPU_IRQ);
2638
2639 /* update irq status */
2640 g_array_append_val(s->cpu_state->irq_stack, irq);
2641 irq_push_mode(&ts->irq_states[irq], LTTV_IRQ_BUSY);
2642
2643 return FALSE;
2644 }
2645
2646 static gboolean soft_irq_exit(void *hook_data, void *call_data)
2647 {
2648 LttvTracefileState *s = (LttvTracefileState *)call_data;
2649 LttvTraceState *ts = (LttvTraceState *)s->parent.t_context;
2650
2651 pop_state(s, LTTV_STATE_SOFT_IRQ);
2652
2653 /* update cpu status */
2654 cpu_pop_mode(s->cpu_state);
2655
2656 /* update softirq status */
2657 if (s->cpu_state->softirq_stack->len > 0) {
2658 gint last = g_array_index(s->cpu_state->softirq_stack, gint, s->cpu_state->softirq_stack->len-1);
2659 if(ts->soft_irq_states[last].running)
2660 ts->soft_irq_states[last].running--;
2661 g_array_remove_index(s->cpu_state->softirq_stack, s->cpu_state->softirq_stack->len-1);
2662 }
2663 return FALSE;
2664 }
2665
2666 static gboolean irq_exit(void *hook_data, void *call_data)
2667 {
2668 LttvTracefileState *s = (LttvTracefileState *)call_data;
2669 LttvTraceState *ts = (LttvTraceState *)s->parent.t_context;
2670
2671 pop_state(s, LTTV_STATE_IRQ);
2672
2673 /* update cpu status */
2674 cpu_pop_mode(s->cpu_state);
2675
2676 /* update irq status */
2677 if (s->cpu_state->irq_stack->len > 0) {
2678 gint last = g_array_index(s->cpu_state->irq_stack, gint, s->cpu_state->irq_stack->len-1);
2679 g_array_remove_index(s->cpu_state->irq_stack, s->cpu_state->irq_stack->len-1);
2680 irq_pop_mode(&ts->irq_states[last]);
2681 }
2682
2683 return FALSE;
2684 }
2685
2686 static gboolean soft_irq_raise(void *hook_data, void *call_data)
2687 {
2688 LttvTracefileState *s = (LttvTracefileState *)call_data;
2689 LttvTraceState *ts = (LttvTraceState *)s->parent.t_context;
2690 LttEvent *e = ltt_tracefile_get_event(s->parent.tf);
2691 //guint8 ev_id = ltt_event_eventtype_id(e);
2692 LttvTraceHook *th = (LttvTraceHook *)hook_data;
2693 struct marker_field *f = lttv_trace_get_hook_field(th, 0);
2694
2695 guint64 softirq = ltt_event_get_long_unsigned(e, f);
2696
2697 expand_soft_irq_table(ts, softirq);
2698
2699 /* update softirq status */
2700 /* a soft irq raises are not cumulative */
2701 ts->soft_irq_states[softirq].pending=1;
2702
2703 return FALSE;
2704 }
2705
2706 static gboolean soft_irq_entry(void *hook_data, void *call_data)
2707 {
2708 LttvTracefileState *s = (LttvTracefileState *)call_data;
2709 LttvTraceState *ts = (LttvTraceState *)s->parent.t_context;
2710 LttEvent *e = ltt_tracefile_get_event(s->parent.tf);
2711 //guint8 ev_id = ltt_event_eventtype_id(e);
2712 LttvTraceHook *th = (LttvTraceHook *)hook_data;
2713 struct marker_field *f = lttv_trace_get_hook_field(th, 0);
2714 LttvExecutionSubmode submode;
2715 guint64 softirq = ltt_event_get_long_unsigned(e, f);
2716 expand_soft_irq_table(ts, softirq);
2717 LttvNameTables *nt = ((LttvTraceState *)(s->parent.t_context))->name_tables;
2718 submode = nt->soft_irq_names[softirq];
2719
2720 /* Do something with the info about being in user or system mode when int? */
2721 push_state(s, LTTV_STATE_SOFT_IRQ, submode);
2722
2723 /* update cpu status */
2724 cpu_push_mode(s->cpu_state, LTTV_CPU_SOFT_IRQ);
2725
2726 /* update softirq status */
2727 g_array_append_val(s->cpu_state->softirq_stack, softirq);
2728 if(ts->soft_irq_states[softirq].pending)
2729 ts->soft_irq_states[softirq].pending--;
2730 ts->soft_irq_states[softirq].running++;
2731
2732 return FALSE;
2733 }
2734
2735 static gboolean enum_interrupt(void *hook_data, void *call_data)
2736 {
2737 LttvTracefileState *s = (LttvTracefileState *)call_data;
2738 LttvTraceState *ts = (LttvTraceState *)s->parent.t_context;
2739 LttvNameTables *nt = ts->name_tables;
2740 LttEvent *e = ltt_tracefile_get_event(s->parent.tf);
2741 //guint8 ev_id = ltt_event_eventtype_id(e);
2742 LttvTraceHook *th = (LttvTraceHook *)hook_data;
2743
2744 GQuark action = g_quark_from_string(ltt_event_get_string(e,
2745 lttv_trace_get_hook_field(th, 0)));
2746 guint irq = ltt_event_get_long_unsigned(e, lttv_trace_get_hook_field(th, 1));
2747
2748 expand_irq_table(ts, irq);
2749 nt->irq_names[irq] = action;
2750
2751 return FALSE;
2752 }
2753
2754
2755 static gboolean bdev_request_issue(void *hook_data, void *call_data)
2756 {
2757 LttvTracefileState *s = (LttvTracefileState *)call_data;
2758 LttvTraceState *ts = (LttvTraceState *)s->parent.t_context;
2759 LttEvent *e = ltt_tracefile_get_event(s->parent.tf);
2760 //guint8 ev_id = ltt_event_eventtype_id(e);
2761 LttvTraceHook *th = (LttvTraceHook *)hook_data;
2762
2763 guint major = ltt_event_get_long_unsigned(e,
2764 lttv_trace_get_hook_field(th, 0));
2765 guint minor = ltt_event_get_long_unsigned(e,
2766 lttv_trace_get_hook_field(th, 1));
2767 guint oper = ltt_event_get_long_unsigned(e,
2768 lttv_trace_get_hook_field(th, 2));
2769 guint32 devcode = MKDEV(major,minor);
2770
2771 /* have we seen this block device before? */
2772 gpointer bdev = get_hashed_bdevstate(ts, devcode);
2773
2774 if(oper == 0)
2775 bdev_push_mode(bdev, LTTV_BDEV_BUSY_READING);
2776 else
2777 bdev_push_mode(bdev, LTTV_BDEV_BUSY_WRITING);
2778
2779 return FALSE;
2780 }
2781
2782 static gboolean bdev_request_complete(void *hook_data, void *call_data)
2783 {
2784 LttvTracefileState *s = (LttvTracefileState *)call_data;
2785 LttvTraceState *ts = (LttvTraceState *)s->parent.t_context;
2786 LttEvent *e = ltt_tracefile_get_event(s->parent.tf);
2787 LttvTraceHook *th = (LttvTraceHook *)hook_data;
2788
2789 guint major = ltt_event_get_long_unsigned(e,
2790 lttv_trace_get_hook_field(th, 0));
2791 guint minor = ltt_event_get_long_unsigned(e,
2792 lttv_trace_get_hook_field(th, 1));
2793 //guint oper = ltt_event_get_long_unsigned(e,
2794 // lttv_trace_get_hook_field(th, 2));
2795 guint32 devcode = MKDEV(major,minor);
2796
2797 /* have we seen this block device before? */
2798 gpointer bdev = get_hashed_bdevstate(ts, devcode);
2799
2800 /* update block device */
2801 bdev_pop_mode(bdev);
2802
2803 return FALSE;
2804 }
2805
2806 static void push_function(LttvTracefileState *tfs, guint64 funcptr)
2807 {
2808 guint64 *new_func;
2809
2810 LttvTraceState *ts = (LttvTraceState*)tfs->parent.t_context;
2811 guint cpu = tfs->cpu;
2812 LttvProcessState *process = ts->running_process[cpu];
2813
2814 guint depth = process->user_stack->len;
2815
2816 process->user_stack =
2817 g_array_set_size(process->user_stack, depth + 1);
2818
2819 new_func = &g_array_index(process->user_stack, guint64, depth);
2820 *new_func = funcptr;
2821 process->current_function = funcptr;
2822 }
2823
2824 static void pop_function(LttvTracefileState *tfs, guint64 funcptr)
2825 {
2826 guint cpu = tfs->cpu;
2827 LttvTraceState *ts = (LttvTraceState*)tfs->parent.t_context;
2828 LttvProcessState *process = ts->running_process[cpu];
2829
2830 if(process->current_function != funcptr){
2831 g_info("Different functions (%lu.%09lu): ignore it\n",
2832 tfs->parent.timestamp.tv_sec, tfs->parent.timestamp.tv_nsec);
2833 g_info("process state has %" PRIu64 " when pop_function is %" PRIu64 "\n",
2834 process->current_function, funcptr);
2835 g_info("{ %u, %u, %s, %s, %s }\n",
2836 process->pid,
2837 process->ppid,
2838 g_quark_to_string(process->name),
2839 g_quark_to_string(process->brand),
2840 g_quark_to_string(process->state->s));
2841 return;
2842 }
2843 guint depth = process->user_stack->len;
2844
2845 if(depth == 0){
2846 g_info("Trying to pop last function on stack (%lu.%09lu): ignore it\n",
2847 tfs->parent.timestamp.tv_sec, tfs->parent.timestamp.tv_nsec);
2848 return;
2849 }
2850
2851 process->user_stack =
2852 g_array_set_size(process->user_stack, depth - 1);
2853 process->current_function =
2854 g_array_index(process->user_stack, guint64, depth - 2);
2855 }
2856
2857
2858 static gboolean function_entry(void *hook_data, void *call_data)
2859 {
2860 LttvTracefileState *s = (LttvTracefileState *)call_data;
2861 LttEvent *e = ltt_tracefile_get_event(s->parent.tf);
2862 //guint8 ev_id = ltt_event_eventtype_id(e);
2863 LttvTraceHook *th = (LttvTraceHook *)hook_data;
2864 struct marker_field *f = lttv_trace_get_hook_field(th, 0);
2865 guint64 funcptr = ltt_event_get_long_unsigned(e, f);
2866
2867 push_function(s, funcptr);
2868 return FALSE;
2869 }
2870
2871 static gboolean function_exit(void *hook_data, void *call_data)
2872 {
2873 LttvTracefileState *s = (LttvTracefileState *)call_data;
2874 LttEvent *e = ltt_tracefile_get_event(s->parent.tf);
2875 //guint8 ev_id = ltt_event_eventtype_id(e);
2876 LttvTraceHook *th = (LttvTraceHook *)hook_data;
2877 struct marker_field *f = lttv_trace_get_hook_field(th, 0);
2878 guint64 funcptr = ltt_event_get_long_unsigned(e, f);
2879
2880 pop_function(s, funcptr);
2881 return FALSE;
2882 }
2883
2884 static gboolean dump_syscall(void *hook_data, void *call_data)
2885 {
2886 LttvTracefileState *s = (LttvTracefileState *)call_data;
2887 LttvTraceState *ts = (LttvTraceState*)s->parent.t_context;
2888 LttvNameTables *nt = ts->name_tables;
2889 LttEvent *e = ltt_tracefile_get_event(s->parent.tf);
2890 LttvTraceHook *th = (LttvTraceHook *)hook_data;
2891 guint id;
2892 char *symbol;
2893
2894 id = ltt_event_get_unsigned(e, lttv_trace_get_hook_field(th, 0));
2895 symbol = ltt_event_get_string(e, lttv_trace_get_hook_field(th, 2));
2896
2897 expand_syscall_table(ts, id);
2898 nt->syscall_names[id] = g_quark_from_string(symbol);
2899
2900 return FALSE;
2901 }
2902
2903 static gboolean dump_kprobe(void *hook_data, void *call_data)
2904 {
2905 LttvTracefileState *s = (LttvTracefileState *)call_data;
2906 LttvTraceState *ts = (LttvTraceState*)s->parent.t_context;
2907 LttEvent *e = ltt_tracefile_get_event(s->parent.tf);
2908 LttvTraceHook *th = (LttvTraceHook *)hook_data;
2909 guint64 ip;
2910 char *symbol;
2911
2912 ip = ltt_event_get_long_unsigned(e, lttv_trace_get_hook_field(th, 0));
2913 symbol = ltt_event_get_string(e, lttv_trace_get_hook_field(th, 1));
2914
2915 expand_kprobe_table(ts, ip, symbol);
2916
2917 return FALSE;
2918 }
2919
2920 static gboolean dump_softirq(void *hook_data, void *call_data)
2921 {
2922 LttvTracefileState *s = (LttvTracefileState *)call_data;
2923 LttvTraceState *ts = (LttvTraceState*)s->parent.t_context;
2924 LttvNameTables *nt = ts->name_tables;
2925 LttEvent *e = ltt_tracefile_get_event(s->parent.tf);
2926 LttvTraceHook *th = (LttvTraceHook *)hook_data;
2927 guint id;
2928 char *symbol;
2929
2930 id = ltt_event_get_unsigned(e, lttv_trace_get_hook_field(th, 0));
2931 symbol = ltt_event_get_string(e, lttv_trace_get_hook_field(th, 2));
2932
2933 expand_soft_irq_table(ts, id);
2934 nt->soft_irq_names[id] = g_quark_from_string(symbol);
2935
2936 return FALSE;
2937 }
2938
2939 static gboolean sched_try_wakeup(void *hook_data, void *call_data)
2940 {
2941 LttvTracefileState *s = (LttvTracefileState *)call_data;
2942 LttEvent *e = ltt_tracefile_get_event(s->parent.tf);
2943 LttvTraceHook *th = (LttvTraceHook *)hook_data;
2944 LttvProcessState *process;
2945 gint woken_pid;
2946 guint woken_cpu;
2947
2948 woken_pid = ltt_event_get_int(e, lttv_trace_get_hook_field(th, 0));
2949 woken_cpu = ltt_event_get_unsigned(e, lttv_trace_get_hook_field(th, 1));
2950
2951 process = lttv_state_find_process_or_create(
2952 (LttvTraceState*)s->parent.t_context,
2953 woken_cpu, woken_pid,
2954 &s->parent.timestamp);
2955
2956 if (process->state->s == LTTV_STATE_WAIT || process->state->s == LTTV_STATE_WAIT_FORK)
2957 {
2958 process->state->s = LTTV_STATE_WAIT_CPU;
2959 process->state->change = s->parent.timestamp;
2960 }
2961
2962 g_debug("Wakeup: process %d on CPU %u\n", woken_pid, woken_cpu);
2963
2964 return FALSE;
2965 }
2966
2967 static gboolean schedchange(void *hook_data, void *call_data)
2968 {
2969 LttvTracefileState *s = (LttvTracefileState *)call_data;
2970 guint cpu = s->cpu;
2971 LttvTraceState *ts = (LttvTraceState*)s->parent.t_context;
2972 LttvProcessState *process = ts->running_process[cpu];
2973 //LttvProcessState *old_process = ts->running_process[cpu];
2974
2975 LttEvent *e = ltt_tracefile_get_event(s->parent.tf);
2976 LttvTraceHook *th = (LttvTraceHook *)hook_data;
2977 guint pid_in, pid_out;
2978 gint64 state_out;
2979
2980 pid_out = ltt_event_get_unsigned(e, lttv_trace_get_hook_field(th, 0));
2981 pid_in = ltt_event_get_unsigned(e, lttv_trace_get_hook_field(th, 1));
2982 state_out = ltt_event_get_long_int(e, lttv_trace_get_hook_field(th, 2));
2983
2984 if(likely(process != NULL)) {
2985
2986 /* We could not know but it was not the idle process executing.
2987 This should only happen at the beginning, before the first schedule
2988 event, and when the initial information (current process for each CPU)
2989 is missing. It is not obvious how we could, after the fact, compensate
2990 the wrongly attributed statistics. */
2991
2992 //This test only makes sense once the state is known and if there is no
2993 //missing events. We need to silently ignore schedchange coming after a
2994 //process_free, or it causes glitches. (FIXME)
2995 //if(unlikely(process->pid != pid_out)) {
2996 // g_assert(process->pid == 0);
2997 //}
2998 if(process->pid == 0
2999 && process->state->t == LTTV_STATE_MODE_UNKNOWN) {
3000 if(pid_out == 0) {
3001 /*
3002 * Scheduling out of pid 0 at beginning of the trace.
3003 * We are typically in system call mode at this point although
3004 * (FIXME) we might be in a trap handler.
3005 */
3006 g_assert(process->execution_stack->len == 1);
3007 process->state->t = LTTV_STATE_SYSCALL;
3008 process->state->s = LTTV_STATE_WAIT;
3009 process->state->change = s->parent.timestamp;
3010 process->state->entry = s->parent.timestamp;
3011 }
3012 } else {
3013 if(unlikely(process->state->s == LTTV_STATE_EXIT)) {
3014 process->state->s = LTTV_STATE_ZOMBIE;
3015 process->state->change = s->parent.timestamp;
3016 } else {
3017 if(unlikely(state_out == 0)) process->state->s = LTTV_STATE_WAIT_CPU;
3018 else process->state->s = LTTV_STATE_WAIT;
3019 process->state->change = s->parent.timestamp;
3020 }
3021
3022 if(state_out == 32 || state_out == 64) { /* EXIT_DEAD || TASK_DEAD */
3023 /* see sched.h for states */
3024 if (!exit_process(s, process)) {
3025 process->state->s = LTTV_STATE_DEAD;
3026 process->state->change = s->parent.timestamp;
3027 }
3028 }
3029 }
3030 }
3031 process = ts->running_process[cpu] = lttv_state_find_process_or_create(
3032 (LttvTraceState*)s->parent.t_context,
3033 cpu, pid_in,
3034 &s->parent.timestamp);
3035 process->state->s = LTTV_STATE_RUN;
3036 process->cpu = cpu;
3037 if(process->usertrace)
3038 process->usertrace->cpu = cpu;
3039 // process->last_cpu_index = ltt_tracefile_num(((LttvTracefileContext*)s)->tf);
3040 process->state->change = s->parent.timestamp;
3041
3042 /* update cpu status */
3043 if(pid_in == 0)
3044 /* going to idle task */
3045 cpu_set_base_mode(s->cpu_state, LTTV_CPU_IDLE);
3046 else {
3047 /* scheduling a real task.
3048 * we must be careful here:
3049 * if we just schedule()'ed to a process that is
3050 * in a trap, we must put the cpu in trap mode
3051 */
3052 cpu_set_base_mode(s->cpu_state, LTTV_CPU_BUSY);
3053 if(process->state->t == LTTV_STATE_TRAP)
3054 cpu_push_mode(s->cpu_state, LTTV_CPU_TRAP);
3055 }
3056
3057 return FALSE;
3058 }
3059
3060 static gboolean process_fork(void *hook_data, void *call_data)
3061 {
3062 LttvTracefileState *s = (LttvTracefileState *)call_data;
3063 LttEvent *e = ltt_tracefile_get_event(s->parent.tf);
3064 LttvTraceHook *th = (LttvTraceHook *)hook_data;
3065 guint child_pid; /* In the Linux Kernel, there is one PID per thread. */
3066 guint child_tgid; /* tgid in the Linux kernel is the "real" POSIX PID. */
3067 //LttvProcessState *zombie_process;
3068 guint cpu = s->cpu;
3069 LttvTraceState *ts = (LttvTraceState*)s->parent.t_context;
3070 LttvProcessState *process = ts->running_process[cpu];
3071 LttvProcessState *child_process;
3072 struct marker_field *f;
3073
3074 /* Skip Parent PID param */
3075
3076 /* Child PID */
3077 child_pid = ltt_event_get_unsigned(e, lttv_trace_get_hook_field(th, 1));
3078 s->parent.target_pid = child_pid;
3079
3080 /* Child TGID */
3081 f = lttv_trace_get_hook_field(th, 2);
3082 if (likely(f))
3083 child_tgid = ltt_event_get_unsigned(e, f);
3084 else
3085 child_tgid = 0;
3086
3087 /* Mathieu : it seems like the process might have been scheduled in before the
3088 * fork, and, in a rare case, might be the current process. This might happen
3089 * in a SMP case where we don't have enough precision on the clocks.
3090 *
3091 * Test reenabled after precision fixes on time. (Mathieu) */
3092 #if 0
3093 zombie_process = lttv_state_find_process(ts, ANY_CPU, child_pid);
3094
3095 if(unlikely(zombie_process != NULL)) {
3096 /* Reutilisation of PID. Only now we are sure that the old PID
3097 * has been released. FIXME : should know when release_task happens instead.
3098 */
3099 guint num_cpus = ltt_trace_get_num_cpu(ts->parent.t);
3100 guint i;
3101 for(i=0; i< num_cpus; i++) {
3102 g_assert(zombie_process != ts->running_process[i]);
3103 }
3104
3105 exit_process(s, zombie_process);
3106 }
3107 #endif //0
3108 g_assert(process->pid != child_pid);
3109 // FIXME : Add this test in the "known state" section
3110 // g_assert(process->pid == parent_pid);
3111 child_process = lttv_state_find_process(ts, ANY_CPU, child_pid);
3112 if(child_process == NULL) {
3113 child_process = lttv_state_create_process(ts, process, cpu,
3114 child_pid, child_tgid,
3115 LTTV_STATE_UNNAMED, &s->parent.timestamp);
3116 } else {
3117 /* The process has already been created : due to time imprecision between
3118 * multiple CPUs : it has been scheduled in before creation. Note that we
3119 * shouldn't have this kind of imprecision.
3120 *
3121 * Simply put a correct parent.
3122 */
3123 g_error("Process %u has been created at [%lu.%09lu] "
3124 "and inserted at [%lu.%09lu] before \n"
3125 "fork on cpu %u[%lu.%09lu].\n"
3126 "Probably an unsynchronized TSC problem on the traced machine.",
3127 child_pid,
3128 child_process->creation_time.tv_sec,
3129 child_process->creation_time.tv_nsec,
3130 child_process->insertion_time.tv_sec,
3131 child_process->insertion_time.tv_nsec,
3132 cpu, ltt_event_time(e).tv_sec, ltt_event_time(e).tv_nsec);
3133 //g_assert(0); /* This is a problematic case : the process has been created
3134 // before the fork event */
3135 child_process->ppid = process->pid;
3136 child_process->tgid = child_tgid;
3137 }
3138 g_assert(child_process->name == LTTV_STATE_UNNAMED);
3139 child_process->name = process->name;
3140 child_process->brand = process->brand;
3141
3142 return FALSE;
3143 }
3144
3145 /* We stamp a newly created process as kernel_thread.
3146 * The thread should not be running yet. */
3147 static gboolean process_kernel_thread(void *hook_data, void *call_data)
3148 {
3149 LttvTracefileState *s = (LttvTracefileState *)call_data;
3150 LttEvent *e = ltt_tracefile_get_event(s->parent.tf);
3151 LttvTraceHook *th = (LttvTraceHook *)hook_data;
3152 guint pid;
3153 LttvTraceState *ts = (LttvTraceState*)s->parent.t_context;
3154 LttvProcessState *process;
3155 LttvExecutionState *es;
3156
3157 /* PID */
3158 pid = (guint)ltt_event_get_long_unsigned(e, lttv_trace_get_hook_field(th, 0));
3159 s->parent.target_pid = pid;
3160
3161 process = lttv_state_find_process_or_create(ts, ANY_CPU, pid,
3162 &ltt_time_zero);
3163 if (process->state->s != LTTV_STATE_DEAD) {
3164 process->execution_stack =
3165 g_array_set_size(process->execution_stack, 1);
3166 es = process->state =
3167 &g_array_index(process->execution_stack, LttvExecutionState, 0);
3168 es->t = LTTV_STATE_SYSCALL;
3169 }
3170 process->type = LTTV_STATE_KERNEL_THREAD;
3171
3172 return FALSE;
3173 }
3174
3175 static gboolean process_exit(void *hook_data, void *call_data)
3176 {
3177 LttvTracefileState *s = (LttvTracefileState *)call_data;
3178 LttEvent *e = ltt_tracefile_get_event(s->parent.tf);
3179 LttvTraceHook *th = (LttvTraceHook *)hook_data;
3180 guint pid;
3181 LttvTraceState *ts = (LttvTraceState*)s->parent.t_context;
3182 LttvProcessState *process; // = ts->running_process[cpu];
3183
3184 pid = ltt_event_get_unsigned(e, lttv_trace_get_hook_field(th, 0));
3185 s->parent.target_pid = pid;
3186
3187 // FIXME : Add this test in the "known state" section
3188 // g_assert(process->pid == pid);
3189
3190 process = lttv_state_find_process(ts, ANY_CPU, pid);
3191 if(likely(process != NULL)) {
3192 process->state->s = LTTV_STATE_EXIT;
3193 }
3194 return FALSE;
3195 }
3196
3197 static gboolean process_free(void *hook_data, void *call_data)
3198 {
3199 LttvTracefileState *s = (LttvTracefileState *)call_data;
3200 LttvTraceState *ts = (LttvTraceState*)s->parent.t_context;
3201 LttEvent *e = ltt_tracefile_get_event(s->parent.tf);
3202 LttvTraceHook *th = (LttvTraceHook *)hook_data;
3203 guint release_pid;
3204 LttvProcessState *process;
3205
3206 /* PID of the process to release */
3207 release_pid = ltt_event_get_unsigned(e, lttv_trace_get_hook_field(th, 0));
3208 s->parent.target_pid = release_pid;
3209
3210 g_assert(release_pid != 0);
3211
3212 process = lttv_state_find_process(ts, ANY_CPU, release_pid);
3213 if(likely(process != NULL))
3214 exit_process(s, process);
3215 return FALSE;
3216 //DISABLED
3217 if(likely(process != NULL)) {
3218 /* release_task is happening at kernel level : we can now safely release
3219 * the data structure of the process */
3220 //This test is fun, though, as it may happen that
3221 //at time t : CPU 0 : process_free
3222 //at time t+150ns : CPU 1 : schedule out
3223 //Clearly due to time imprecision, we disable it. (Mathieu)
3224 //If this weird case happen, we have no choice but to put the
3225 //Currently running process on the cpu to 0.
3226 //I re-enable it following time precision fixes. (Mathieu)
3227 //Well, in the case where an process is freed by a process on another CPU
3228 //and still scheduled, it happens that this is the schedchange that will
3229 //drop the last reference count. Do not free it here!
3230 guint num_cpus = ltt_trace_get_num_cpu(ts->parent.t);
3231 guint i;
3232 for(i=0; i< num_cpus; i++) {
3233 //g_assert(process != ts->running_process[i]);
3234 if(process == ts->running_process[i]) {
3235 //ts->running_process[i] = lttv_state_find_process(ts, i, 0);
3236 break;
3237 }
3238 }
3239 if(i == num_cpus) /* process is not scheduled */
3240 exit_process(s, process);
3241 }
3242
3243 return FALSE;
3244 }
3245
3246
3247 static gboolean process_exec(void *hook_data, void *call_data)
3248 {
3249 LttvTracefileState *s = (LttvTracefileState *)call_data;
3250 LttvTraceState *ts = (LttvTraceState*)s->parent.t_context;
3251 LttEvent *e = ltt_tracefile_get_event(s->parent.tf);
3252 LttvTraceHook *th = (LttvTraceHook *)hook_data;
3253 //gchar *name;
3254 guint cpu = s->cpu;
3255 LttvProcessState *process = ts->running_process[cpu];
3256
3257 #if 0//how to use a sequence that must be transformed in a string
3258 /* PID of the process to release */
3259 guint64 name_len = ltt_event_field_element_number(e,
3260 lttv_trace_get_hook_field(th, 0));
3261 //name = ltt_event_get_string(e, lttv_trace_get_hook_field(th, 0));
3262 LttField *child = ltt_event_field_element_select(e,
3263 lttv_trace_get_hook_field(th, 0), 0);
3264 gchar *name_begin =
3265 (gchar*)(ltt_event_data(e)+ltt_event_field_offset(e, child));
3266 gchar *null_term_name = g_new(gchar, name_len+1);
3267 memcpy(null_term_name, name_begin, name_len);
3268 null_term_name[name_len] = '\0';
3269 process->name = g_quark_from_string(null_term_name);
3270 #endif //0
3271
3272 process->name = g_quark_from_string(ltt_event_get_string(e,
3273 lttv_trace_get_hook_field(th, 0)));
3274 process->brand = LTTV_STATE_UNBRANDED;
3275 //g_free(null_term_name);
3276 return FALSE;
3277 }
3278
3279 static gboolean thread_brand(void *hook_data, void *call_data)
3280 {
3281 LttvTracefileState *s = (LttvTracefileState *)call_data;
3282 LttvTraceState *ts = (LttvTraceState*)s->parent.t_context;
3283 LttEvent *e = ltt_tracefile_get_event(s->parent.tf);
3284 LttvTraceHook *th = (LttvTraceHook *)hook_data;
3285 gchar *name;
3286 guint cpu = s->cpu;
3287 LttvProcessState *process = ts->running_process[cpu];
3288
3289 name = ltt_event_get_string(e, lttv_trace_get_hook_field(th, 0));
3290 process->brand = g_quark_from_string(name);
3291
3292 return FALSE;
3293 }
3294
3295 static gboolean fs_open(void *hook_data, void *call_data)
3296 {
3297 LttvTracefileState *s = (LttvTracefileState *)call_data;
3298 LttvTraceState *ts = (LttvTraceState *)s->parent.t_context;
3299 LttEvent *e = ltt_tracefile_get_event(s->parent.tf);
3300 LttvTraceHook *th = (LttvTraceHook *)hook_data;
3301 struct marker_field *f;
3302 guint cpu = s->cpu;
3303 int fd;
3304 char *filename;
3305 LttvProcessState *process = ts->running_process[cpu];
3306
3307 f = lttv_trace_get_hook_field(th, 0);
3308 fd = ltt_event_get_int(e, f);
3309
3310 f = lttv_trace_get_hook_field(th, 1);
3311 filename = ltt_event_get_string(e, f);
3312
3313 g_hash_table_insert(process->fds, (gpointer)(long)fd,
3314 (gpointer)(unsigned long)g_quark_from_string(filename));
3315
3316 return FALSE;
3317 }
3318
3319 static void print_stack(LttvProcessState *process)
3320 {
3321 LttvExecutionState *es;
3322 int i;
3323
3324 g_debug("Execution stack for process %u %s:\n",
3325 process->pid, g_quark_to_string(process->name));
3326
3327 for (i = 0; i < process->execution_stack->len; i++) {
3328 es = &g_array_index(process->execution_stack,
3329 LttvExecutionState, i);
3330 g_debug("Depth %d mode %s submode %s status %s\n",
3331 i, g_quark_to_string(es->t),
3332 g_quark_to_string(es->n),
3333 g_quark_to_string(es->s));
3334 }
3335
3336 }
3337
3338 static void fix_process(gpointer key, gpointer value, gpointer user_data)
3339 {
3340 LttvProcessState *process;
3341 LttvExecutionState *es;
3342 process = (LttvProcessState *)value;
3343 LttTime *timestamp = (LttTime*)user_data;
3344
3345 print_stack(process);
3346
3347 if(process->type == LTTV_STATE_KERNEL_THREAD) {
3348 es = &g_array_index(process->execution_stack, LttvExecutionState, 0);
3349 if(es->t == LTTV_STATE_MAYBE_SYSCALL) {
3350 es->t = LTTV_STATE_SYSCALL;
3351 es->n = LTTV_STATE_SUBMODE_NONE;
3352 es->entry = *timestamp;
3353 es->change = *timestamp;
3354 es->cum_cpu_time = ltt_time_zero;
3355 if(es->s == LTTV_STATE_UNNAMED)
3356 es->s = LTTV_STATE_WAIT;
3357 }
3358 } else {
3359 es = &g_array_index(process->execution_stack, LttvExecutionState, 0);
3360 if(es->t == LTTV_STATE_MAYBE_USER_MODE) {
3361 es->t = LTTV_STATE_USER_MODE;
3362 es->n = LTTV_STATE_SUBMODE_NONE;
3363 es->entry = *timestamp;
3364 //g_assert(timestamp->tv_sec != 0);
3365 es->change = *timestamp;
3366 es->cum_cpu_time = ltt_time_zero;
3367 if(es->s == LTTV_STATE_UNNAMED)
3368 es->s = LTTV_STATE_RUN;
3369
3370 if(process->execution_stack->len == 1) {
3371 /* Still in bottom unknown mode, means we either:
3372 * - never did a system call
3373 * - are scheduled out from user mode.
3374 * May be either in user mode, syscall mode, running or waiting.*/
3375 /* CHECK : we may be tagging syscall mode when being user mode
3376 * (should be fixed now) */
3377 if (es->s == LTTV_STATE_WAIT_CPU) {
3378 /* nothing to do: scheduled out from userspace */
3379 } else {
3380 process->execution_stack =
3381 g_array_set_size(process->execution_stack, 2);
3382 es = process->state = &g_array_index(process->execution_stack,
3383 LttvExecutionState, 1);
3384 es->t = LTTV_STATE_SYSCALL;
3385 es->n = LTTV_STATE_SUBMODE_NONE;
3386 es->entry = *timestamp;
3387 //g_assert(timestamp->tv_sec != 0);
3388 es->change = *timestamp;
3389 es->cum_cpu_time = ltt_time_zero;
3390 if(es->s == LTTV_STATE_WAIT_FORK)
3391 es->s = LTTV_STATE_WAIT;
3392 }
3393 }
3394 }
3395 }
3396 }
3397
3398 static gboolean statedump_end(void *hook_data, void *call_data)
3399 {
3400 LttvTracefileState *s = (LttvTracefileState *)call_data;
3401 LttvTraceState *ts = (LttvTraceState*)s->parent.t_context;
3402 LttvTracefileContext *tfc = (LttvTracefileContext *)call_data;
3403 //LttEvent *e = ltt_tracefile_get_event(s->parent.tf);
3404 //LttvTraceHook *th = (LttvTraceHook *)hook_data;
3405
3406 /* For all processes */
3407 /* if kernel thread, if stack[0] is unknown, set to syscall mode, wait */
3408 /* else, if stack[0] is unknown, set to user mode, running */
3409
3410 g_hash_table_foreach(ts->processes, fix_process, &tfc->timestamp);
3411
3412 return FALSE;
3413 }
3414
3415 static gboolean enum_process_state(void *hook_data, void *call_data)
3416 {
3417 LttvTracefileState *s = (LttvTracefileState *)call_data;
3418 LttEvent *e = ltt_tracefile_get_event(s->parent.tf);
3419 //It's slow : optimise later by doing this before reading trace.
3420 LttvTraceHook *th = (LttvTraceHook *)hook_data;
3421 guint parent_pid;
3422 guint pid;
3423 guint tgid;
3424 gchar * command;
3425 guint cpu = s->cpu;
3426 LttvTraceState *ts = (LttvTraceState*)s->parent.t_context;
3427 LttvProcessState *process = ts->running_process[cpu];
3428 LttvProcessState *parent_process;
3429 struct marker_field *f;
3430 GQuark type;
3431 LttvExecutionState *es;
3432 guint i, nb_cpus;
3433
3434 /* PID */
3435 pid = ltt_event_get_unsigned(e, lttv_trace_get_hook_field(th, 0));
3436 s->parent.target_pid = pid;
3437
3438 /* Parent PID */
3439 parent_pid = ltt_event_get_unsigned(e, lttv_trace_get_hook_field(th, 1));
3440
3441 /* Command name */
3442 command = ltt_event_get_string(e, lttv_trace_get_hook_field(th, 2));
3443
3444 /* type */
3445 f = lttv_trace_get_hook_field(th, 3);
3446 type = ltt_enum_string_get(f, ltt_event_get_unsigned(e, f));
3447
3448 //FIXME: type is rarely used, enum must match possible types.
3449
3450 /* Skip mode 4th param */
3451
3452 /* Skip submode 5th param */
3453
3454 /* Skip status 6th param */
3455
3456 /* TGID */
3457 f = lttv_trace_get_hook_field(th, 7);
3458 if(f)
3459 tgid = ltt_event_get_unsigned(e, f);
3460 else
3461 tgid = 0;
3462
3463 if(pid == 0) {
3464 nb_cpus = ltt_trace_get_num_cpu(ts->parent.t);
3465 for(i=0; i<nb_cpus; i++) {
3466 process = lttv_state_find_process(ts, i, pid);
3467 g_assert(process != NULL);
3468
3469 process->ppid = parent_pid;
3470 process->tgid = tgid;
3471 process->name = g_quark_from_string(command);
3472 es = &g_array_index(process->execution_stack, LttvExecutionState, 0);
3473 process->type = LTTV_STATE_KERNEL_THREAD;
3474 }
3475
3476 } else {
3477 /* The process might exist if a process was forked while performing the
3478 * state dump. */
3479 process = lttv_state_find_process(ts, ANY_CPU, pid);
3480 if(process == NULL) {
3481 parent_process = lttv_state_find_process(ts, ANY_CPU, parent_pid);
3482 process = lttv_state_create_process(ts, parent_process, cpu,
3483 pid, tgid, g_quark_from_string(command),
3484 &s->parent.timestamp);
3485
3486 /* Keep the stack bottom : a running user mode */
3487 /* Disabled because of inconsistencies in the current statedump states. */
3488 if(type == LTTV_STATE_KERNEL_THREAD) {
3489 /* Only keep the bottom
3490 * FIXME Kernel thread : can be in syscall or interrupt or trap. */
3491 /* Will cause expected trap when in fact being syscall (even after end of
3492 * statedump event)
3493 * Will cause expected interrupt when being syscall. (only before end of
3494 * statedump event) */
3495 // This will cause a "popping last state on stack, ignoring it."
3496 process->execution_stack = g_array_set_size(process->execution_stack, 1);
3497 es = process->state = &g_array_index(process->execution_stack,
3498 LttvExecutionState, 0);
3499 process->type = LTTV_STATE_KERNEL_THREAD;
3500 es->t = LTTV_STATE_MAYBE_SYSCALL;
3501 es->s = LTTV_STATE_UNNAMED;
3502 es->n = LTTV_STATE_SUBMODE_UNKNOWN;
3503 //es->s = status;
3504 //es->n = submode;
3505 } else {
3506 /* User space process :
3507 * bottom : user mode
3508 * either currently running or scheduled out.
3509 * can be scheduled out because interrupted in (user mode or in syscall)
3510 * or because of an explicit call to the scheduler in syscall. Note that
3511 * the scheduler call comes after the irq_exit, so never in interrupt
3512 * context. */
3513 // temp workaround : set size to 1 : only have user mode bottom of stack.
3514 // will cause g_info message of expected syscall mode when in fact being
3515 // in user mode. Can also cause expected trap when in fact being user
3516 // mode in the event of a page fault reenabling interrupts in the handler.
3517 // Expected syscall and trap can also happen after the end of statedump
3518 // This will cause a "popping last state on stack, ignoring it."
3519 process->execution_stack = g_array_set_size(process->execution_stack, 1);
3520 es = process->state = &g_array_index(process->execution_stack,
3521 LttvExecutionState, 0);
3522 es->t = LTTV_STATE_MAYBE_USER_MODE;
3523 es->s = LTTV_STATE_UNNAMED;
3524 es->n = LTTV_STATE_SUBMODE_UNKNOWN;
3525 //es->s = status;
3526 //es->n = submode;
3527 }
3528 #if 0
3529 /* UNKNOWN STATE */
3530 {
3531 es = process->state = &g_array_index(process->execution_stack,
3532 LttvExecutionState, 1);
3533 es->t = LTTV_STATE_MODE_UNKNOWN;
3534 es->s = LTTV_STATE_UNNAMED;
3535 es->n = LTTV_STATE_SUBMODE_UNKNOWN;
3536 }
3537 #endif //0
3538 } else {
3539 /* The process has already been created :
3540 * Probably was forked while dumping the process state or
3541 * was simply scheduled in prior to get the state dump event.
3542 */
3543 process->ppid = parent_pid;
3544 process->tgid = tgid;
3545 process->name = g_quark_from_string(command);
3546 process->type = type;
3547 es = &g_array_index(process->execution_stack, LttvExecutionState, 0);
3548 #if 0
3549 if(es->t == LTTV_STATE_MODE_UNKNOWN) {
3550 if(type == LTTV_STATE_KERNEL_THREAD)
3551 es->t = LTTV_STATE_SYSCALL;
3552 else
3553 es->t = LTTV_STATE_USER_MODE;
3554 }
3555 #endif //0
3556 /* Don't mess around with the stack, it will eventually become
3557 * ok after the end of state dump. */
3558 }
3559 }
3560
3561 return FALSE;
3562 }
3563
3564 gint lttv_state_hook_add_event_hooks(void *hook_data, void *call_data)
3565 {
3566 LttvTracesetState *tss = (LttvTracesetState*)(call_data);
3567
3568 lttv_state_add_event_hooks(tss);
3569
3570 return 0;
3571 }
3572
3573 void lttv_state_add_event_hooks(LttvTracesetState *self)
3574 {
3575 LttvTraceset *traceset = self->parent.ts;
3576
3577 guint i, j, k, nb_trace, nb_tracefile;
3578
3579 LttvTraceState *ts;
3580
3581 LttvTracefileState *tfs;
3582
3583 GArray *hooks;
3584
3585 LttvTraceHook *th;
3586
3587 LttvAttributeValue val;
3588
3589 nb_trace = lttv_traceset_number(traceset);
3590 for(i = 0 ; i < nb_trace ; i++) {
3591 ts = (LttvTraceState *)self->parent.traces[i];
3592
3593 /* Find the eventtype id for the following events and register the
3594 associated by id hooks. */
3595
3596 hooks = g_array_sized_new(FALSE, FALSE, sizeof(LttvTraceHook), 20);
3597 //hooks = g_array_set_size(hooks, 19); // Max possible number of hooks.
3598 //hn = 0;
3599
3600 lttv_trace_find_hook(ts->parent.t,
3601 LTT_CHANNEL_KERNEL,
3602 LTT_EVENT_SYSCALL_ENTRY,
3603 FIELD_ARRAY(LTT_FIELD_SYSCALL_ID),
3604 syscall_entry, NULL, &hooks);
3605
3606 lttv_trace_find_hook(ts->parent.t,
3607 LTT_CHANNEL_KERNEL,
3608 LTT_EVENT_SYSCALL_EXIT,
3609 NULL,
3610 syscall_exit, NULL, &hooks);
3611
3612 lttv_trace_find_hook(ts->parent.t,
3613 LTT_CHANNEL_KERNEL,
3614 LTT_EVENT_TRAP_ENTRY,
3615 FIELD_ARRAY(LTT_FIELD_TRAP_ID),
3616 trap_entry, NULL, &hooks);
3617
3618 lttv_trace_find_hook(ts->parent.t,
3619 LTT_CHANNEL_KERNEL,
3620 LTT_EVENT_TRAP_EXIT,
3621 NULL,
3622 trap_exit, NULL, &hooks);
3623
3624 lttv_trace_find_hook(ts->parent.t,
3625 LTT_CHANNEL_KERNEL,
3626 LTT_EVENT_PAGE_FAULT_ENTRY,
3627 FIELD_ARRAY(LTT_FIELD_TRAP_ID),
3628 trap_entry, NULL, &hooks);
3629
3630 lttv_trace_find_hook(ts->parent.t,
3631 LTT_CHANNEL_KERNEL,
3632 LTT_EVENT_PAGE_FAULT_EXIT,
3633 NULL,
3634 trap_exit, NULL, &hooks);
3635
3636 lttv_trace_find_hook(ts->parent.t,
3637 LTT_CHANNEL_KERNEL,
3638 LTT_EVENT_PAGE_FAULT_NOSEM_ENTRY,
3639 FIELD_ARRAY(LTT_FIELD_TRAP_ID),
3640 trap_entry, NULL, &hooks);
3641
3642 lttv_trace_find_hook(ts->parent.t,
3643 LTT_CHANNEL_KERNEL,
3644 LTT_EVENT_PAGE_FAULT_NOSEM_EXIT,
3645 NULL,
3646 trap_exit, NULL, &hooks);
3647
3648 lttv_trace_find_hook(ts->parent.t,
3649 LTT_CHANNEL_KERNEL,
3650 LTT_EVENT_IRQ_ENTRY,
3651 FIELD_ARRAY(LTT_FIELD_IRQ_ID),
3652 irq_entry, NULL, &hooks);
3653
3654 lttv_trace_find_hook(ts->parent.t,
3655 LTT_CHANNEL_KERNEL,
3656 LTT_EVENT_IRQ_EXIT,
3657 NULL,
3658 irq_exit, NULL, &hooks);
3659
3660 lttv_trace_find_hook(ts->parent.t,
3661 LTT_CHANNEL_KERNEL,
3662 LTT_EVENT_SOFT_IRQ_RAISE,
3663 FIELD_ARRAY(LTT_FIELD_SOFT_IRQ_ID),
3664 soft_irq_raise, NULL, &hooks);
3665
3666 lttv_trace_find_hook(ts->parent.t,
3667 LTT_CHANNEL_KERNEL,
3668 LTT_EVENT_SOFT_IRQ_ENTRY,
3669 FIELD_ARRAY(LTT_FIELD_SOFT_IRQ_ID),
3670 soft_irq_entry, NULL, &hooks);
3671
3672 lttv_trace_find_hook(ts->parent.t,
3673 LTT_CHANNEL_KERNEL,
3674 LTT_EVENT_SOFT_IRQ_EXIT,
3675 NULL,
3676 soft_irq_exit, NULL, &hooks);
3677
3678 lttv_trace_find_hook(ts->parent.t,
3679 LTT_CHANNEL_KERNEL,
3680 LTT_EVENT_SCHED_SCHEDULE,
3681 FIELD_ARRAY(LTT_FIELD_PREV_PID, LTT_FIELD_NEXT_PID,
3682 LTT_FIELD_PREV_STATE),
3683 schedchange, NULL, &hooks);
3684
3685 lttv_trace_find_hook(ts->parent.t,
3686 LTT_CHANNEL_KERNEL,
3687 LTT_EVENT_SCHED_TRY_WAKEUP,
3688 FIELD_ARRAY(LTT_FIELD_PID, LTT_FIELD_CPU_ID, LTT_FIELD_STATE),
3689 sched_try_wakeup, NULL, &hooks);
3690
3691 lttv_trace_find_hook(ts->parent.t,
3692 LTT_CHANNEL_KERNEL,
3693 LTT_EVENT_PROCESS_FORK,
3694 FIELD_ARRAY(LTT_FIELD_PARENT_PID, LTT_FIELD_CHILD_PID,
3695 LTT_FIELD_CHILD_TGID),
3696 process_fork, NULL, &hooks);
3697
3698 lttv_trace_find_hook(ts->parent.t,
3699 LTT_CHANNEL_KERNEL,
3700 LTT_EVENT_KTHREAD_CREATE,
3701 FIELD_ARRAY(LTT_FIELD_PID),
3702 process_kernel_thread, NULL, &hooks);
3703
3704 lttv_trace_find_hook(ts->parent.t,
3705 LTT_CHANNEL_KERNEL,
3706 LTT_EVENT_PROCESS_EXIT,
3707 FIELD_ARRAY(LTT_FIELD_PID),
3708 process_exit, NULL, &hooks);
3709
3710 lttv_trace_find_hook(ts->parent.t,
3711 LTT_CHANNEL_KERNEL,
3712 LTT_EVENT_PROCESS_FREE,
3713 FIELD_ARRAY(LTT_FIELD_PID),
3714 process_free, NULL, &hooks);
3715
3716 lttv_trace_find_hook(ts->parent.t,
3717 LTT_CHANNEL_FS,
3718 LTT_EVENT_EXEC,
3719 FIELD_ARRAY(LTT_FIELD_FILENAME),
3720 process_exec, NULL, &hooks);
3721
3722 lttv_trace_find_hook(ts->parent.t,
3723 LTT_CHANNEL_USERSPACE,
3724 LTT_EVENT_THREAD_BRAND,
3725 FIELD_ARRAY(LTT_FIELD_NAME),
3726 thread_brand, NULL, &hooks);
3727
3728 /* statedump-related hooks */
3729 lttv_trace_find_hook(ts->parent.t,
3730 LTT_CHANNEL_TASK_STATE,
3731 LTT_EVENT_PROCESS_STATE,
3732 FIELD_ARRAY(LTT_FIELD_PID, LTT_FIELD_PARENT_PID, LTT_FIELD_NAME,
3733 LTT_FIELD_TYPE, LTT_FIELD_MODE, LTT_FIELD_SUBMODE,
3734 LTT_FIELD_STATUS, LTT_FIELD_TGID),
3735 enum_process_state, NULL, &hooks);
3736
3737 lttv_trace_find_hook(ts->parent.t,
3738 LTT_CHANNEL_GLOBAL_STATE,
3739 LTT_EVENT_STATEDUMP_END,
3740 NULL,
3741 statedump_end, NULL, &hooks);
3742
3743 lttv_trace_find_hook(ts->parent.t,
3744 LTT_CHANNEL_IRQ_STATE,
3745 LTT_EVENT_LIST_INTERRUPT,
3746 FIELD_ARRAY(LTT_FIELD_ACTION, LTT_FIELD_IRQ_ID),
3747 enum_interrupt, NULL, &hooks);
3748
3749 lttv_trace_find_hook(ts->parent.t,
3750 LTT_CHANNEL_BLOCK,
3751 LTT_EVENT_REQUEST_ISSUE,
3752 FIELD_ARRAY(LTT_FIELD_MAJOR, LTT_FIELD_MINOR, LTT_FIELD_OPERATION),
3753 bdev_request_issue, NULL, &hooks);
3754
3755 lttv_trace_find_hook(ts->parent.t,
3756 LTT_CHANNEL_BLOCK,
3757 LTT_EVENT_REQUEST_COMPLETE,
3758 FIELD_ARRAY(LTT_FIELD_MAJOR, LTT_FIELD_MINOR, LTT_FIELD_OPERATION),
3759 bdev_request_complete, NULL, &hooks);
3760
3761 lttv_trace_find_hook(ts->parent.t,
3762 LTT_CHANNEL_USERSPACE,
3763 LTT_EVENT_FUNCTION_ENTRY,
3764 FIELD_ARRAY(LTT_FIELD_THIS_FN, LTT_FIELD_CALL_SITE),
3765 function_entry, NULL, &hooks);
3766
3767 lttv_trace_find_hook(ts->parent.t,
3768 LTT_CHANNEL_USERSPACE,
3769 LTT_EVENT_FUNCTION_EXIT,
3770 FIELD_ARRAY(LTT_FIELD_THIS_FN, LTT_FIELD_CALL_SITE),
3771 function_exit, NULL, &hooks);
3772
3773 lttv_trace_find_hook(ts->parent.t,
3774 LTT_CHANNEL_SYSCALL_STATE,
3775 LTT_EVENT_SYS_CALL_TABLE,
3776 FIELD_ARRAY(LTT_FIELD_ID, LTT_FIELD_ADDRESS, LTT_FIELD_SYMBOL),
3777 dump_syscall, NULL, &hooks);
3778
3779 lttv_trace_find_hook(ts->parent.t,
3780 LTT_CHANNEL_KPROBE_STATE,
3781 LTT_EVENT_KPROBE_TABLE,
3782 FIELD_ARRAY(LTT_FIELD_IP, LTT_FIELD_SYMBOL),
3783 dump_kprobe, NULL, &hooks);
3784
3785 lttv_trace_find_hook(ts->parent.t,
3786 LTT_CHANNEL_SOFTIRQ_STATE,
3787 LTT_EVENT_SOFTIRQ_VEC,
3788 FIELD_ARRAY(LTT_FIELD_ID, LTT_FIELD_ADDRESS, LTT_FIELD_SYMBOL),
3789 dump_softirq, NULL, &hooks);
3790
3791 lttv_trace_find_hook(ts->parent.t,
3792 LTT_CHANNEL_FS,
3793 LTT_EVENT_OPEN,
3794 FIELD_ARRAY(LTT_FIELD_FD, LTT_FIELD_FILENAME),
3795 fs_open, NULL, &hooks);
3796
3797 /* Add these hooks to each event_by_id hooks list */
3798
3799 nb_tracefile = ts->parent.tracefiles->len;
3800
3801 for(j = 0 ; j < nb_tracefile ; j++) {
3802 tfs =
3803 LTTV_TRACEFILE_STATE(g_array_index(ts->parent.tracefiles,
3804 LttvTracefileContext*, j));
3805
3806 for(k = 0 ; k < hooks->len ; k++) {
3807 th = &g_array_index(hooks, LttvTraceHook, k);
3808 if (th->mdata == tfs->parent.tf->mdata)
3809 lttv_hooks_add(
3810 lttv_hooks_by_id_find(tfs->parent.event_by_id, th->id),
3811 th->h,
3812 th,
3813 LTTV_PRIO_STATE);
3814 }
3815 }
3816 lttv_attribute_find(ts->parent.a, LTTV_STATE_HOOKS, LTTV_POINTER, &val);
3817 *(val.v_pointer) = hooks;
3818 }
3819 }
3820
3821 gint lttv_state_hook_remove_event_hooks(void *hook_data, void *call_data)
3822 {
3823 LttvTracesetState *tss = (LttvTracesetState*)(call_data);
3824
3825 lttv_state_remove_event_hooks(tss);
3826
3827 return 0;
3828 }
3829
3830 void lttv_state_remove_event_hooks(LttvTracesetState *self)
3831 {
3832 LttvTraceset *traceset = self->parent.ts;
3833
3834 guint i, j, k, nb_trace, nb_tracefile;
3835
3836 LttvTraceState *ts;
3837
3838 LttvTracefileState *tfs;
3839
3840 GArray *hooks;
3841
3842 LttvTraceHook *th;
3843
3844 LttvAttributeValue val;
3845
3846 nb_trace = lttv_traceset_number(traceset);
3847 for(i = 0 ; i < nb_trace ; i++) {
3848 ts = LTTV_TRACE_STATE(self->parent.traces[i]);
3849
3850 lttv_attribute_find(ts->parent.a, LTTV_STATE_HOOKS, LTTV_POINTER, &val);
3851 hooks = *(val.v_pointer);
3852
3853 /* Remove these hooks from each event_by_id hooks list */
3854
3855 nb_tracefile = ts->parent.tracefiles->len;
3856
3857 for(j = 0 ; j < nb_tracefile ; j++) {
3858 tfs =
3859 LTTV_TRACEFILE_STATE(g_array_index(ts->parent.tracefiles,
3860 LttvTracefileContext*, j));
3861
3862 for(k = 0 ; k < hooks->len ; k++) {
3863 th = &g_array_index(hooks, LttvTraceHook, k);
3864 if (th->mdata == tfs->parent.tf->mdata)
3865 lttv_hooks_remove_data(
3866 lttv_hooks_by_id_find(tfs->parent.event_by_id, th->id),
3867 th->h,
3868 th);
3869 }
3870 }
3871 lttv_trace_hook_remove_all(&hooks);
3872 g_array_free(hooks, TRUE);
3873 }
3874 }
3875
3876 static gboolean state_save_event_hook(void *hook_data, void *call_data)
3877 {
3878 guint *event_count = (guint*)hook_data;
3879
3880 /* Only save at LTTV_STATE_SAVE_INTERVAL */
3881 if(likely((*event_count)++ < LTTV_STATE_SAVE_INTERVAL))
3882 return FALSE;
3883 else
3884 *event_count = 0;
3885
3886 LttvTracefileState *self = (LttvTracefileState *)call_data;
3887
3888 LttvTraceState *tcs = (LttvTraceState *)(self->parent.t_context);
3889
3890 LttvAttribute *saved_states_tree, *saved_state_tree;
3891
3892 LttvAttributeValue value;
3893
3894 saved_states_tree = lttv_attribute_find_subdir(tcs->parent.t_a,
3895 LTTV_STATE_SAVED_STATES);
3896 saved_state_tree = g_object_new(LTTV_ATTRIBUTE_TYPE, NULL);
3897 value = lttv_attribute_add(saved_states_tree,
3898 lttv_attribute_get_number(saved_states_tree), LTTV_GOBJECT);
3899 *(value.v_gobject) = (GObject *)saved_state_tree;
3900 value = lttv_attribute_add(saved_state_tree, LTTV_STATE_TIME, LTTV_TIME);
3901 *(value.v_time) = self->parent.timestamp;
3902 lttv_state_save(tcs, saved_state_tree);
3903 g_debug("Saving state at time %lu.%lu", self->parent.timestamp.tv_sec,
3904 self->parent.timestamp.tv_nsec);
3905
3906 *(tcs->max_time_state_recomputed_in_seek) = self->parent.timestamp;
3907
3908 return FALSE;
3909 }
3910
3911 static gboolean state_save_after_trace_hook(void *hook_data, void *call_data)
3912 {
3913 LttvTraceState *tcs = (LttvTraceState *)(call_data);
3914
3915 *(tcs->max_time_state_recomputed_in_seek) = tcs->parent.time_span.end_time;
3916
3917 return FALSE;
3918 }
3919
3920 guint lttv_state_current_cpu(LttvTracefileState *tfs)
3921 {
3922 return tfs->cpu;
3923 }
3924
3925
3926
3927 #if 0
3928 static gboolean block_start(void *hook_data, void *call_data)
3929 {
3930 LttvTracefileState *self = (LttvTracefileState *)call_data;
3931
3932 LttvTracefileState *tfcs;
3933
3934 LttvTraceState *tcs = (LttvTraceState *)(self->parent.t_context);
3935
3936 LttEventPosition *ep;
3937
3938 guint i, nb_block, nb_event, nb_tracefile;
3939
3940 LttTracefile *tf;
3941
3942 LttvAttribute *saved_states_tree, *saved_state_tree;
3943
3944 LttvAttributeValue value;
3945
3946 ep = ltt_event_position_new();
3947
3948 nb_tracefile = tcs->parent.tracefiles->len;
3949
3950 /* Count the number of events added since the last block end in any
3951 tracefile. */
3952
3953 for(i = 0 ; i < nb_tracefile ; i++) {
3954 tfcs =
3955 LTTV_TRACEFILE_STATE(&g_array_index(tcs->parent.tracefiles,
3956 LttvTracefileContext, i));
3957 ltt_event_position(tfcs->parent.e, ep);
3958 ltt_event_position_get(ep, &nb_block, &nb_event, &tf);
3959 tcs->nb_event += nb_event - tfcs->saved_position;
3960 tfcs->saved_position = nb_event;
3961 }
3962 g_free(ep);
3963
3964 if(tcs->nb_event >= tcs->save_interval) {
3965 saved_states_tree = lttv_attribute_find_subdir(tcs->parent.t_a,
3966 LTTV_STATE_SAVED_STATES);
3967 saved_state_tree = g_object_new(LTTV_ATTRIBUTE_TYPE, NULL);
3968 value = lttv_attribute_add(saved_states_tree,
3969 lttv_attribute_get_number(saved_states_tree), LTTV_GOBJECT);
3970 *(value.v_gobject) = (GObject *)saved_state_tree;
3971 value = lttv_attribute_add(saved_state_tree, LTTV_STATE_TIME, LTTV_TIME);
3972 *(value.v_time) = self->parent.timestamp;
3973 lttv_state_save(tcs, saved_state_tree);
3974 tcs->nb_event = 0;
3975 g_debug("Saving state at time %lu.%lu", self->parent.timestamp.tv_sec,
3976 self->parent.timestamp.tv_nsec);
3977 }
3978 *(tcs->max_time_state_recomputed_in_seek) = self->parent.timestamp;
3979 return FALSE;
3980 }
3981 #endif //0
3982
3983 #if 0
3984 static gboolean block_end(void *hook_data, void *call_data)
3985 {
3986 LttvTracefileState *self = (LttvTracefileState *)call_data;
3987
3988 LttvTraceState *tcs = (LttvTraceState *)(self->parent.t_context);
3989
3990 LttTracefile *tf;
3991
3992 LttEventPosition *ep;
3993
3994 guint nb_block, nb_event;
3995
3996 ep = ltt_event_position_new();
3997 ltt_event_position(self->parent.e, ep);
3998 ltt_event_position_get(ep, &nb_block, &nb_event, &tf);
3999 tcs->nb_event += nb_event - self->saved_position + 1;
4000 self->saved_position = 0;
4001 *(tcs->max_time_state_recomputed_in_seek) = self->parent.timestamp;
4002 g_free(ep);
4003
4004 return FALSE;
4005 }
4006 #endif //0
4007 #if 0
4008 void lttv_state_save_add_event_hooks(LttvTracesetState *self)
4009 {
4010 LttvTraceset *traceset = self->parent.ts;
4011
4012 guint i, j, nb_trace, nb_tracefile;
4013
4014 LttvTraceState *ts;
4015
4016 LttvTracefileState *tfs;
4017
4018 LttvTraceHook hook_start, hook_end;
4019
4020 nb_trace = lttv_traceset_number(traceset);
4021 for(i = 0 ; i < nb_trace ; i++) {
4022 ts = (LttvTraceState *)self->parent.traces[i];
4023
4024 lttv_trace_find_hook(ts->parent.t, "core","block_start",NULL,
4025 NULL, NULL, block_start, &hook_start);
4026 lttv_trace_find_hook(ts->parent.t, "core","block_end",NULL,
4027 NULL, NULL, block_end, &hook_end);
4028
4029 nb_tracefile = ts->parent.tracefiles->len;
4030
4031 for(j = 0 ; j < nb_tracefile ; j++) {
4032 tfs =
4033 LTTV_TRACEFILE_STATE(&g_array_index(ts->parent.tracefiles,
4034 LttvTracefileContext, j));
4035 lttv_hooks_add(lttv_hooks_by_id_find(tfs->parent.event_by_id,
4036 hook_start.id), hook_start.h, NULL, LTTV_PRIO_STATE);
4037 lttv_hooks_add(lttv_hooks_by_id_find(tfs->parent.event_by_id,
4038 hook_end.id), hook_end.h, NULL, LTTV_PRIO_STATE);
4039 }
4040 }
4041 }
4042 #endif //0
4043
4044 void lttv_state_save_add_event_hooks(LttvTracesetState *self)
4045 {
4046 LttvTraceset *traceset = self->parent.ts;
4047
4048 guint i, j, nb_trace, nb_tracefile;
4049
4050 LttvTraceState *ts;
4051
4052 LttvTracefileState *tfs;
4053
4054
4055 nb_trace = lttv_traceset_number(traceset);
4056 for(i = 0 ; i < nb_trace ; i++) {
4057
4058 ts = (LttvTraceState *)self->parent.traces[i];
4059 nb_tracefile = ts->parent.tracefiles->len;
4060
4061 if(ts->has_precomputed_states) continue;
4062
4063 guint *event_count = g_new(guint, 1);
4064 *event_count = 0;
4065
4066 for(j = 0 ; j < nb_tracefile ; j++) {
4067 tfs =
4068 LTTV_TRACEFILE_STATE(g_array_index(ts->parent.tracefiles,
4069 LttvTracefileContext*, j));
4070 lttv_hooks_add(tfs->parent.event,
4071 state_save_event_hook,
4072 event_count,
4073 LTTV_PRIO_STATE);
4074
4075 }
4076 }
4077
4078 lttv_process_traceset_begin(&self->parent,
4079 NULL, NULL, NULL, NULL, NULL);
4080
4081 }
4082
4083 gint lttv_state_save_hook_add_event_hooks(void *hook_data, void *call_data)
4084 {
4085 LttvTracesetState *tss = (LttvTracesetState*)(call_data);
4086
4087 lttv_state_save_add_event_hooks(tss);
4088
4089 return 0;
4090 }
4091
4092
4093 #if 0
4094 void lttv_state_save_remove_event_hooks(LttvTracesetState *self)
4095 {
4096 LttvTraceset *traceset = self->parent.ts;
4097
4098 guint i, j, nb_trace, nb_tracefile;
4099
4100 LttvTraceState *ts;
4101
4102 LttvTracefileState *tfs;
4103
4104 LttvTraceHook hook_start, hook_end;
4105
4106 nb_trace = lttv_traceset_number(traceset);
4107 for(i = 0 ; i < nb_trace ; i++) {
4108 ts = LTTV_TRACE_STATE(self->parent.traces[i]);
4109
4110 lttv_trace_find_hook(ts->parent.t, "core","block_start",NULL,
4111 NULL, NULL, block_start, &hook_start);
4112
4113 lttv_trace_find_hook(ts->parent.t, "core","block_end",NULL,
4114 NULL, NULL, block_end, &hook_end);
4115
4116 nb_tracefile = ts->parent.tracefiles->len;
4117
4118 for(j = 0 ; j < nb_tracefile ; j++) {
4119 tfs =
4120 LTTV_TRACEFILE_STATE(&g_array_index(ts->parent.tracefiles,
4121 LttvTracefileContext, j));
4122 lttv_hooks_remove_data(lttv_hooks_by_id_find(
4123 tfs->parent.event_by_id, hook_start.id), hook_start.h, NULL);
4124 lttv_hooks_remove_data(lttv_hooks_by_id_find(
4125 tfs->parent.event_by_id, hook_end.id), hook_end.h, NULL);
4126 }
4127 }
4128 }
4129 #endif //0
4130
4131 void lttv_state_save_remove_event_hooks(LttvTracesetState *self)
4132 {
4133 LttvTraceset *traceset = self->parent.ts;
4134
4135 guint i, j, nb_trace, nb_tracefile;
4136
4137 LttvTraceState *ts;
4138
4139 LttvTracefileState *tfs;
4140
4141 LttvHooks *after_trace = lttv_hooks_new();
4142
4143 lttv_hooks_add(after_trace,
4144 state_save_after_trace_hook,
4145 NULL,
4146 LTTV_PRIO_STATE);
4147
4148
4149 lttv_process_traceset_end(&self->parent,
4150 NULL, after_trace, NULL, NULL, NULL);
4151
4152 lttv_hooks_destroy(after_trace);
4153
4154 nb_trace = lttv_traceset_number(traceset);
4155 for(i = 0 ; i < nb_trace ; i++) {
4156
4157 ts = (LttvTraceState *)self->parent.traces[i];
4158 nb_tracefile = ts->parent.tracefiles->len;
4159
4160 if(ts->has_precomputed_states) continue;
4161
4162 guint *event_count = NULL;
4163
4164 for(j = 0 ; j < nb_tracefile ; j++) {
4165 tfs =
4166 LTTV_TRACEFILE_STATE(g_array_index(ts->parent.tracefiles,
4167 LttvTracefileContext*, j));
4168 event_count = lttv_hooks_remove(tfs->parent.event,
4169 state_save_event_hook);
4170 }
4171 if(event_count) g_free(event_count);
4172 }
4173 }
4174
4175 gint lttv_state_save_hook_remove_event_hooks(void *hook_data, void *call_data)
4176 {
4177 LttvTracesetState *tss = (LttvTracesetState*)(call_data);
4178
4179 lttv_state_save_remove_event_hooks(tss);
4180
4181 return 0;
4182 }
4183
4184 void lttv_state_traceset_seek_time_closest(LttvTracesetState *self, LttTime t)
4185 {
4186 LttvTraceset *traceset = self->parent.ts;
4187
4188 guint i, nb_trace;
4189
4190 int min_pos, mid_pos, max_pos;
4191
4192 guint call_rest = 0;
4193
4194 LttvTraceState *tcs;
4195
4196 LttvAttributeValue value;
4197
4198 LttvAttributeType type;
4199
4200 LttvAttributeName name;
4201
4202 gboolean is_named;
4203
4204 LttvAttribute *saved_states_tree, *saved_state_tree, *closest_tree = NULL;
4205
4206 //g_tree_destroy(self->parent.pqueue);
4207 //self->parent.pqueue = g_tree_new(compare_tracefile);
4208
4209 g_info("Entering seek_time_closest for time %lu.%lu", t.tv_sec, t.tv_nsec);
4210
4211 nb_trace = lttv_traceset_number(traceset);
4212 for(i = 0 ; i < nb_trace ; i++) {
4213 tcs = (LttvTraceState *)self->parent.traces[i];
4214
4215 if(ltt_time_compare(t, *(tcs->max_time_state_recomputed_in_seek)) < 0) {
4216 saved_states_tree = lttv_attribute_find_subdir(tcs->parent.t_a,
4217 LTTV_STATE_SAVED_STATES);
4218 min_pos = -1;
4219
4220 if(saved_states_tree) {
4221 max_pos = lttv_attribute_get_number(saved_states_tree) - 1;
4222 mid_pos = max_pos / 2;
4223 while(min_pos < max_pos) {
4224 type = lttv_attribute_get(saved_states_tree, mid_pos,
4225 &name, &value, &is_named);
4226 g_assert(type == LTTV_GOBJECT);
4227 saved_state_tree = *((LttvAttribute **)(value.v_gobject));
4228 type = lttv_attribute_get_by_name(saved_state_tree,
4229 LTTV_STATE_TIME, &value);
4230 g_assert(type == LTTV_TIME);
4231 if(ltt_time_compare(*(value.v_time), t) < 0) {
4232 min_pos = mid_pos;
4233 closest_tree = saved_state_tree;
4234 }
4235 else max_pos = mid_pos - 1;
4236
4237 mid_pos = (min_pos + max_pos + 1) / 2;
4238 }
4239 }
4240
4241 /* restore the closest earlier saved state */
4242 if(min_pos != -1) {
4243 lttv_state_restore(tcs, closest_tree);
4244 call_rest = 1;
4245 }
4246
4247 /* There is no saved state, yet we want to have it. Restart at T0 */
4248 else {
4249 restore_init_state(tcs);
4250 lttv_process_trace_seek_time(&(tcs->parent), ltt_time_zero);
4251 }
4252 }
4253 /* We want to seek quickly without restoring/updating the state */
4254 else {
4255 restore_init_state(tcs);
4256 lttv_process_trace_seek_time(&(tcs->parent), t);
4257 }
4258 }
4259 if(!call_rest) g_info("NOT Calling restore");
4260 }
4261
4262
4263 static void traceset_state_instance_init (GTypeInstance *instance, gpointer g_class)
4264 {
4265 }
4266
4267
4268 static void traceset_state_finalize (LttvTracesetState *self)
4269 {
4270 G_OBJECT_CLASS(g_type_class_peek(LTTV_TRACESET_CONTEXT_TYPE))->
4271 finalize(G_OBJECT(self));
4272 }
4273
4274
4275 static void traceset_state_class_init (LttvTracesetContextClass *klass)
4276 {
4277 GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
4278
4279 gobject_class->finalize = (void (*)(GObject *self)) traceset_state_finalize;
4280 klass->init = (void (*)(LttvTracesetContext *self, LttvTraceset *ts))init;
4281 klass->fini = (void (*)(LttvTracesetContext *self))fini;
4282 klass->new_traceset_context = new_traceset_context;
4283 klass->new_trace_context = new_trace_context;
4284 klass->new_tracefile_context = new_tracefile_context;
4285 }
4286
4287
4288 GType lttv_traceset_state_get_type(void)
4289 {
4290 static GType type = 0;
4291 if (type == 0) {
4292 static const GTypeInfo info = {
4293 sizeof (LttvTracesetStateClass),
4294 NULL, /* base_init */
4295 NULL, /* base_finalize */
4296 (GClassInitFunc) traceset_state_class_init, /* class_init */
4297 NULL, /* class_finalize */
4298 NULL, /* class_data */
4299 sizeof (LttvTracesetState),
4300 0, /* n_preallocs */
4301 (GInstanceInitFunc) traceset_state_instance_init, /* instance_init */
4302 NULL /* value handling */
4303 };
4304
4305 type = g_type_register_static (LTTV_TRACESET_CONTEXT_TYPE, "LttvTracesetStateType",
4306 &info, 0);
4307 }
4308 return type;
4309 }
4310
4311
4312 static void trace_state_instance_init (GTypeInstance *instance, gpointer g_class)
4313 {
4314 }
4315
4316
4317 static void trace_state_finalize (LttvTraceState *self)
4318 {
4319 G_OBJECT_CLASS(g_type_class_peek(LTTV_TRACE_CONTEXT_TYPE))->
4320 finalize(G_OBJECT(self));
4321 }
4322
4323
4324 static void trace_state_class_init (LttvTraceStateClass *klass)
4325 {
4326 GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
4327
4328 gobject_class->finalize = (void (*)(GObject *self)) trace_state_finalize;
4329 klass->state_save = state_save;
4330 klass->state_restore = state_restore;
4331 klass->state_saved_free = state_saved_free;
4332 }
4333
4334
4335 GType lttv_trace_state_get_type(void)
4336 {
4337 static GType type = 0;
4338 if (type == 0) {
4339 static const GTypeInfo info = {
4340 sizeof (LttvTraceStateClass),
4341 NULL, /* base_init */
4342 NULL, /* base_finalize */
4343 (GClassInitFunc) trace_state_class_init, /* class_init */
4344 NULL, /* class_finalize */
4345 NULL, /* class_data */
4346 sizeof (LttvTraceState),
4347 0, /* n_preallocs */
4348 (GInstanceInitFunc) trace_state_instance_init, /* instance_init */
4349 NULL /* value handling */
4350 };
4351
4352 type = g_type_register_static (LTTV_TRACE_CONTEXT_TYPE,
4353 "LttvTraceStateType", &info, 0);
4354 }
4355 return type;
4356 }
4357
4358
4359 static void tracefile_state_instance_init (GTypeInstance *instance,
4360 gpointer g_class)
4361 {
4362 }
4363
4364
4365 static void tracefile_state_finalize (LttvTracefileState *self)
4366 {
4367 G_OBJECT_CLASS(g_type_class_peek(LTTV_TRACEFILE_CONTEXT_TYPE))->
4368 finalize(G_OBJECT(self));
4369 }
4370
4371
4372 static void tracefile_state_class_init (LttvTracefileStateClass *klass)
4373 {
4374 GObjectClass *gobject_class = G_OBJECT_CLASS(klass);
4375
4376 gobject_class->finalize = (void (*)(GObject *self)) tracefile_state_finalize;
4377 }
4378
4379
4380 GType lttv_tracefile_state_get_type(void)
4381 {
4382 static GType type = 0;
4383 if (type == 0) {
4384 static const GTypeInfo info = {
4385 sizeof (LttvTracefileStateClass),
4386 NULL, /* base_init */
4387 NULL, /* base_finalize */
4388 (GClassInitFunc) tracefile_state_class_init, /* class_init */
4389 NULL, /* class_finalize */
4390 NULL, /* class_data */
4391 sizeof (LttvTracefileState),
4392 0, /* n_preallocs */
4393 (GInstanceInitFunc) tracefile_state_instance_init, /* instance_init */
4394 NULL /* value handling */
4395 };
4396
4397 type = g_type_register_static (LTTV_TRACEFILE_CONTEXT_TYPE,
4398 "LttvTracefileStateType", &info, 0);
4399 }
4400 return type;
4401 }
4402
4403
4404 static void module_init()
4405 {
4406 LTTV_STATE_UNNAMED = g_quark_from_string("");
4407 LTTV_STATE_UNBRANDED = g_quark_from_string("");
4408 LTTV_STATE_MODE_UNKNOWN = g_quark_from_string("MODE_UNKNOWN");
4409 LTTV_STATE_USER_MODE = g_quark_from_string("USER_MODE");
4410 LTTV_STATE_MAYBE_USER_MODE = g_quark_from_string("MAYBE_USER_MODE");
4411 LTTV_STATE_SYSCALL = g_quark_from_string("SYSCALL");
4412 LTTV_STATE_MAYBE_SYSCALL = g_quark_from_string("MAYBE_SYSCALL");
4413 LTTV_STATE_TRAP = g_quark_from_string("TRAP");
4414 LTTV_STATE_MAYBE_TRAP = g_quark_from_string("MAYBE_TRAP");
4415 LTTV_STATE_IRQ = g_quark_from_string("IRQ");
4416 LTTV_STATE_SOFT_IRQ = g_quark_from_string("SOFTIRQ");
4417 LTTV_STATE_SUBMODE_UNKNOWN = g_quark_from_string("UNKNOWN");
4418 LTTV_STATE_SUBMODE_NONE = g_quark_from_string("NONE");
4419 LTTV_STATE_WAIT_FORK = g_quark_from_string("WAIT_FORK");
4420 LTTV_STATE_WAIT_CPU = g_quark_from_string("WAIT_CPU");
4421 LTTV_STATE_EXIT = g_quark_from_string("EXIT");
4422 LTTV_STATE_ZOMBIE = g_quark_from_string("ZOMBIE");
4423 LTTV_STATE_WAIT = g_quark_from_string("WAIT");
4424 LTTV_STATE_RUN = g_quark_from_string("RUN");
4425 LTTV_STATE_DEAD = g_quark_from_string("DEAD");
4426 LTTV_STATE_USER_THREAD = g_quark_from_string("USER_THREAD");
4427 LTTV_STATE_KERNEL_THREAD = g_quark_from_string("KERNEL_THREAD");
4428 LTTV_STATE_TRACEFILES = g_quark_from_string("tracefiles");
4429 LTTV_STATE_PROCESSES = g_quark_from_string("processes");
4430 LTTV_STATE_PROCESS = g_quark_from_string("process");
4431 LTTV_STATE_RUNNING_PROCESS = g_quark_from_string("running_process");
4432 LTTV_STATE_EVENT = g_quark_from_string("event");
4433 LTTV_STATE_SAVED_STATES = g_quark_from_string("saved states");
4434 LTTV_STATE_SAVED_STATES_TIME = g_quark_from_string("saved states time");
4435 LTTV_STATE_TIME = g_quark_from_string("time");
4436 LTTV_STATE_HOOKS = g_quark_from_string("saved state hooks");
4437 LTTV_STATE_NAME_TABLES = g_quark_from_string("name tables");
4438 LTTV_STATE_TRACE_STATE_USE_COUNT =
4439 g_quark_from_string("trace_state_use_count");
4440 LTTV_STATE_RESOURCE_CPUS = g_quark_from_string("cpu resource states");
4441 LTTV_STATE_RESOURCE_CPUS = g_quark_from_string("cpu count");
4442 LTTV_STATE_RESOURCE_IRQS = g_quark_from_string("irq resource states");
4443 LTTV_STATE_RESOURCE_SOFT_IRQS = g_quark_from_string("soft irq resource states");
4444 LTTV_STATE_RESOURCE_TRAPS = g_quark_from_string("trap resource states");
4445 LTTV_STATE_RESOURCE_BLKDEVS = g_quark_from_string("blkdevs resource states");
4446
4447 LTT_CHANNEL_FD_STATE = g_quark_from_string("fd_state");
4448 LTT_CHANNEL_GLOBAL_STATE = g_quark_from_string("global_state");
4449 LTT_CHANNEL_IRQ_STATE = g_quark_from_string("irq_state");
4450 LTT_CHANNEL_MODULE_STATE = g_quark_from_string("module_state");
4451 LTT_CHANNEL_NETIF_STATE = g_quark_from_string("netif_state");
4452 LTT_CHANNEL_SOFTIRQ_STATE = g_quark_from_string("softirq_state");
4453 LTT_CHANNEL_SWAP_STATE = g_quark_from_string("swap_state");
4454 LTT_CHANNEL_SYSCALL_STATE = g_quark_from_string("syscall_state");
4455 LTT_CHANNEL_TASK_STATE = g_quark_from_string("task_state");
4456 LTT_CHANNEL_VM_STATE = g_quark_from_string("vm_state");
4457 LTT_CHANNEL_KPROBE_STATE = g_quark_from_string("kprobe_state");
4458 LTT_CHANNEL_FS = g_quark_from_string("fs");
4459 LTT_CHANNEL_KERNEL = g_quark_from_string("kernel");
4460 LTT_CHANNEL_MM = g_quark_from_string("mm");
4461 LTT_CHANNEL_USERSPACE = g_quark_from_string("userspace");
4462 LTT_CHANNEL_BLOCK = g_quark_from_string("block");
4463
4464 LTT_EVENT_SYSCALL_ENTRY = g_quark_from_string("syscall_entry");
4465 LTT_EVENT_SYSCALL_EXIT = g_quark_from_string("syscall_exit");
4466 LTT_EVENT_TRAP_ENTRY = g_quark_from_string("trap_entry");
4467 LTT_EVENT_TRAP_EXIT = g_quark_from_string("trap_exit");
4468 LTT_EVENT_PAGE_FAULT_ENTRY = g_quark_from_string("page_fault_entry");
4469 LTT_EVENT_PAGE_FAULT_EXIT = g_quark_from_string("page_fault_exit");
4470 LTT_EVENT_PAGE_FAULT_NOSEM_ENTRY = g_quark_from_string("page_fault_nosem_entry");
4471 LTT_EVENT_PAGE_FAULT_NOSEM_EXIT = g_quark_from_string("page_fault_nosem_exit");
4472 LTT_EVENT_IRQ_ENTRY = g_quark_from_string("irq_entry");
4473 LTT_EVENT_IRQ_EXIT = g_quark_from_string("irq_exit");
4474 LTT_EVENT_SOFT_IRQ_RAISE = g_quark_from_string("softirq_raise");
4475 LTT_EVENT_SOFT_IRQ_ENTRY = g_quark_from_string("softirq_entry");
4476 LTT_EVENT_SOFT_IRQ_EXIT = g_quark_from_string("softirq_exit");
4477 LTT_EVENT_SCHED_SCHEDULE = g_quark_from_string("sched_schedule");
4478 LTT_EVENT_SCHED_TRY_WAKEUP = g_quark_from_string("sched_try_wakeup");
4479 LTT_EVENT_PROCESS_FORK = g_quark_from_string("process_fork");
4480 LTT_EVENT_KTHREAD_CREATE = g_quark_from_string("kthread_create");
4481 LTT_EVENT_PROCESS_EXIT = g_quark_from_string("process_exit");
4482 LTT_EVENT_PROCESS_FREE = g_quark_from_string("process_free");
4483 LTT_EVENT_EXEC = g_quark_from_string("exec");
4484 LTT_EVENT_PROCESS_STATE = g_quark_from_string("process_state");
4485 LTT_EVENT_STATEDUMP_END = g_quark_from_string("statedump_end");
4486 LTT_EVENT_FUNCTION_ENTRY = g_quark_from_string("function_entry");
4487 LTT_EVENT_FUNCTION_EXIT = g_quark_from_string("function_exit");
4488 LTT_EVENT_THREAD_BRAND = g_quark_from_string("thread_brand");
4489 LTT_EVENT_REQUEST_ISSUE = g_quark_from_string("_blk_request_issue");
4490 LTT_EVENT_REQUEST_COMPLETE = g_quark_from_string("_blk_request_complete");
4491 LTT_EVENT_LIST_INTERRUPT = g_quark_from_string("interrupt");
4492 LTT_EVENT_SYS_CALL_TABLE = g_quark_from_string("sys_call_table");
4493 LTT_EVENT_SOFTIRQ_VEC = g_quark_from_string("softirq_vec");
4494 LTT_EVENT_KPROBE_TABLE = g_quark_from_string("kprobe_table");
4495 LTT_EVENT_KPROBE = g_quark_from_string("kprobe");
4496 LTT_EVENT_OPEN = g_quark_from_string("open");
4497 LTT_EVENT_READ = g_quark_from_string("read");
4498 LTT_EVENT_POLL_EVENT = g_quark_from_string("poll_event");
4499
4500 LTT_FIELD_SYSCALL_ID = g_quark_from_string("syscall_id");
4501 LTT_FIELD_TRAP_ID = g_quark_from_string("trap_id");
4502 LTT_FIELD_IRQ_ID = g_quark_from_string("irq_id");
4503 LTT_FIELD_SOFT_IRQ_ID = g_quark_from_string("softirq_id");
4504 LTT_FIELD_PREV_PID = g_quark_from_string("prev_pid");
4505 LTT_FIELD_NEXT_PID = g_quark_from_string("next_pid");
4506 LTT_FIELD_PREV_STATE = g_quark_from_string("prev_state");
4507 LTT_FIELD_PARENT_PID = g_quark_from_string("parent_pid");
4508 LTT_FIELD_CHILD_PID = g_quark_from_string("child_pid");
4509 LTT_FIELD_PID = g_quark_from_string("pid");
4510 LTT_FIELD_TGID = g_quark_from_string("tgid");
4511 LTT_FIELD_CHILD_TGID = g_quark_from_string("child_tgid");
4512 LTT_FIELD_FILENAME = g_quark_from_string("filename");
4513 LTT_FIELD_NAME = g_quark_from_string("name");
4514 LTT_FIELD_TYPE = g_quark_from_string("type");
4515 LTT_FIELD_MODE = g_quark_from_string("mode");
4516 LTT_FIELD_SUBMODE = g_quark_from_string("submode");
4517 LTT_FIELD_STATUS = g_quark_from_string("status");
4518 LTT_FIELD_THIS_FN = g_quark_from_string("this_fn");
4519 LTT_FIELD_CALL_SITE = g_quark_from_string("call_site");
4520 LTT_FIELD_MAJOR = g_quark_from_string("major");
4521 LTT_FIELD_MINOR = g_quark_from_string("minor");
4522 LTT_FIELD_OPERATION = g_quark_from_string("direction");
4523 LTT_FIELD_ACTION = g_quark_from_string("action");
4524 LTT_FIELD_ID = g_quark_from_string("id");
4525 LTT_FIELD_ADDRESS = g_quark_from_string("address");
4526 LTT_FIELD_SYMBOL = g_quark_from_string("symbol");
4527 LTT_FIELD_IP = g_quark_from_string("ip");
4528 LTT_FIELD_FD = g_quark_from_string("fd");
4529 LTT_FIELD_STATE = g_quark_from_string("state");
4530 LTT_FIELD_CPU_ID = g_quark_from_string("cpu_id");
4531
4532 LTTV_CPU_UNKNOWN = g_quark_from_string("unknown");
4533 LTTV_CPU_IDLE = g_quark_from_string("idle");
4534 LTTV_CPU_BUSY = g_quark_from_string("busy");
4535 LTTV_CPU_IRQ = g_quark_from_string("irq");
4536 LTTV_CPU_SOFT_IRQ = g_quark_from_string("softirq");
4537 LTTV_CPU_TRAP = g_quark_from_string("trap");
4538
4539 LTTV_IRQ_UNKNOWN = g_quark_from_string("unknown");
4540 LTTV_IRQ_IDLE = g_quark_from_string("idle");
4541 LTTV_IRQ_BUSY = g_quark_from_string("busy");
4542
4543 LTTV_BDEV_UNKNOWN = g_quark_from_string("unknown");
4544 LTTV_BDEV_IDLE = g_quark_from_string("idle");
4545 LTTV_BDEV_BUSY_READING = g_quark_from_string("busy_reading");
4546 LTTV_BDEV_BUSY_WRITING = g_quark_from_string("busy_writing");
4547 }
4548
4549 static void module_destroy()
4550 {
4551 }
4552
4553
4554 LTTV_MODULE("state", "State computation", \
4555 "Update the system state, possibly saving it at intervals", \
4556 module_init, module_destroy)
4557
4558
4559
LTTng 2.x Viewer (LTTV)
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