1 /* Copyright (c) 2008-2012 Da SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
7 #include "mc_private.h"
8 #include "xbt/module.h"
10 #include "../simix/smx_private.h"
12 #include <libunwind.h>
14 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_checkpoint, mc,
15 "Logging specific to mc_checkpoint");
17 void *start_text_libsimgrid;
18 void *start_plt_libsimgrid, *end_plt_libsimgrid;
19 void *start_got_plt_libsimgrid, *end_got_plt_libsimgrid;
20 void *start_plt_binary, *end_plt_binary;
21 void *start_got_plt_binary, *end_got_plt_binary;
22 char *libsimgrid_path;
23 void *start_data_libsimgrid, *start_bss_libsimgrid;
24 void *start_data_binary, *start_bss_binary;
25 void *start_text_binary;
27 static mc_mem_region_t MC_region_new(int type, void *start_addr, size_t size);
28 static void MC_region_restore(mc_mem_region_t reg);
29 static void MC_region_destroy(mc_mem_region_t reg);
31 static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type, void *start_addr, size_t size);
33 static void add_value(xbt_dynar_t *list, const char *type, unsigned long int val);
34 static xbt_dynar_t take_snapshot_stacks(mc_snapshot_t *s, void *heap);
35 static xbt_strbuff_t get_local_variables_values(void *stack_context, void *heap);
36 static void print_local_variables_values(xbt_dynar_t all_variables);
37 static void *get_stack_pointer(void *stack_context, void *heap);
39 static void snapshot_stack_free(mc_snapshot_stack_t s);
40 static xbt_dynar_t take_snapshot_ignore(void);
42 static mc_mem_region_t MC_region_new(int type, void *start_addr, size_t size)
44 mc_mem_region_t new_reg = xbt_new0(s_mc_mem_region_t, 1);
46 new_reg->start_addr = start_addr;
48 new_reg->data = xbt_malloc0(size);
49 memcpy(new_reg->data, start_addr, size);
51 XBT_DEBUG("New region : type : %d, data : %p (real addr %p), size : %zu", type, new_reg->data, start_addr, size);
56 static void MC_region_restore(mc_mem_region_t reg)
58 /*FIXME: check if start_addr is still mapped, if it is not, then map it
59 before copying the data */
61 memcpy(reg->start_addr, reg->data, reg->size);
66 static void MC_region_destroy(mc_mem_region_t reg)
72 static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type, void *start_addr, size_t size)
74 mc_mem_region_t new_reg = MC_region_new(type, start_addr, size);
75 snapshot->regions = xbt_realloc(snapshot->regions, (snapshot->num_reg + 1) * sizeof(mc_mem_region_t));
76 snapshot->regions[snapshot->num_reg] = new_reg;
77 snapshot->region_type[snapshot->num_reg] = type;
82 void MC_init_memory_map_info(){
84 int raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
90 memory_map_t maps = get_memory_map();
92 while (i < maps->mapsize) {
93 reg = maps->regions[i];
94 if ((reg.prot & PROT_WRITE)){
95 if (maps->regions[i].pathname != NULL){
96 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
97 start_data_libsimgrid = reg.start_addr;
99 reg = maps->regions[i];
100 if(reg.pathname == NULL && (reg.prot & PROT_WRITE) && i < maps->mapsize)
101 start_bss_libsimgrid = reg.start_addr;
102 }else if (!memcmp(basename(maps->regions[i].pathname), basename(xbt_binary_name), strlen(basename(xbt_binary_name)))){
103 start_data_binary = reg.start_addr;
105 reg = maps->regions[i];
106 if(reg.pathname == NULL && (reg.prot & PROT_WRITE) && reg.start_addr != std_heap && reg.start_addr != raw_heap && i < maps->mapsize){
107 start_bss_binary = reg.start_addr;
110 }else if(!memcmp(maps->regions[i].pathname, "[stack]", 7)){
111 maestro_stack_start = reg.start_addr;
112 maestro_stack_end = reg.end_addr;
116 }else if ((reg.prot & PROT_READ) && (reg.prot & PROT_EXEC)){
117 if (maps->regions[i].pathname != NULL){
118 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
119 start_text_libsimgrid = reg.start_addr;
120 libsimgrid_path = strdup(maps->regions[i].pathname);
121 }else if (!memcmp(basename(maps->regions[i].pathname), basename(xbt_binary_name), strlen(basename(xbt_binary_name)))){
122 start_text_binary = reg.start_addr;
129 free_memory_map(maps);
138 mc_snapshot_t SIMIX_pre_mc_snapshot(smx_simcall_t simcall){
139 return MC_take_snapshot();
142 mc_snapshot_t MC_take_snapshot()
144 int raw_mem = (mmalloc_get_current_heap() == raw_heap);
148 mc_snapshot_t snapshot = xbt_new0(s_mc_snapshot_t, 1);
149 snapshot->nb_processes = xbt_swag_size(simix_global->process_list);
153 memory_map_t maps = get_memory_map();
158 /* Save the std heap and the writable mapped pages of libsimgrid */
159 while (i < maps->mapsize) {
160 reg = maps->regions[i];
161 if ((reg.prot & PROT_WRITE)){
162 if (maps->regions[i].pathname == NULL){
163 if (reg.start_addr == std_heap){ // only save the std heap (and not the raw one)
164 MC_snapshot_add_region(snapshot, 0, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
165 snapshot->heap_bytes_used = mmalloc_get_bytes_used(std_heap);
166 heap = snapshot->regions[snapshot->num_reg - 1]->data;
170 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
171 size = (char*)reg.end_addr - (char*)reg.start_addr;
172 start = reg.start_addr;
174 reg = maps->regions[i];
175 if(reg.pathname == NULL && (reg.prot & PROT_WRITE) && i < maps->mapsize){
176 size += (char*)reg.end_addr - (char*)reg.start_addr;
177 reg = maps->regions[i];
180 MC_snapshot_add_region(snapshot, 1, start, size);
181 }else if(!memcmp(maps->regions[i].pathname, "[stack]", 7)){
182 maestro_stack_start = reg.start_addr;
183 maestro_stack_end = reg.end_addr;
185 } else if (!memcmp(basename(maps->regions[i].pathname), basename(xbt_binary_name), strlen(basename(xbt_binary_name)))){
186 size = (char*)reg.end_addr - (char*)reg.start_addr;
187 start = reg.start_addr;
189 reg = maps->regions[i];
190 if(reg.pathname == NULL && (reg.prot & PROT_WRITE) && reg.start_addr != std_heap && reg.start_addr != raw_heap && i < maps->mapsize){
191 size += (char*)reg.end_addr - (char*)reg.start_addr;
192 reg = maps->regions[i];
195 MC_snapshot_add_region(snapshot, 2, start, size);
205 snapshot->to_ignore = take_snapshot_ignore();
207 if(_sg_mc_visited > 0 || strcmp(_sg_mc_property_file,""))
208 snapshot->stacks = take_snapshot_stacks(&snapshot, heap);
210 free_memory_map(maps);
221 void MC_restore_snapshot(mc_snapshot_t snapshot)
224 for(i=0; i < snapshot->num_reg; i++){
225 MC_region_restore(snapshot->regions[i]);
230 void MC_free_snapshot(mc_snapshot_t snapshot)
233 for(i=0; i < snapshot->num_reg; i++)
234 MC_region_destroy(snapshot->regions[i]);
236 xbt_free(snapshot->regions);
237 xbt_dynar_free(&(snapshot->stacks));
238 xbt_dynar_free(&(snapshot->to_ignore));
243 void get_libsimgrid_plt_section(){
246 char *line = NULL; /* Temporal storage for each line that is readed */
247 ssize_t read; /* Number of bytes readed */
248 size_t n = 0; /* Amount of bytes to read by xbt_getline */
251 int i, plt_found = 0;
252 unsigned long int size, offset;
254 char *command = bprintf("objdump --section-headers %s", libsimgrid_path);
256 fp = popen(command, "r");
259 perror("popen failed");
263 while ((read = xbt_getline(&line, &n, fp)) != -1 && plt_found != 2) {
268 /* Wipeout the new line character */
269 line[read - 1] = '\0';
271 lfields[0] = strtok(line, " ");
273 if(lfields[0] == NULL)
276 if(strcmp(lfields[0], "Sections:") == 0 || strcmp(lfields[0], "Idx") == 0 || strncmp(lfields[0], libsimgrid_path, strlen(libsimgrid_path)) == 0)
279 for (i = 1; i < 7 && lfields[i - 1] != NULL; i++) {
280 lfields[i] = strtok(NULL, " ");
284 if(strcmp(lfields[1], ".plt") == 0){
285 size = strtoul(lfields[2], NULL, 16);
286 offset = strtoul(lfields[5], NULL, 16);
287 start_plt_libsimgrid = (char *)start_text_libsimgrid + offset;
288 end_plt_libsimgrid = (char *)start_plt_libsimgrid + size;
290 }else if(strcmp(lfields[1], ".got.plt") == 0){
291 size = strtoul(lfields[2], NULL, 16);
292 offset = strtoul(lfields[5], NULL, 16);
293 start_got_plt_libsimgrid = (char *)start_text_libsimgrid + offset;
294 end_got_plt_libsimgrid = (char *)start_got_plt_libsimgrid + size;
308 void get_binary_plt_section(){
311 char *line = NULL; /* Temporal storage for each line that is readed */
312 ssize_t read; /* Number of bytes readed */
313 size_t n = 0; /* Amount of bytes to read by xbt_getline */
316 int i, plt_found = 0;
317 unsigned long int size;
319 char *command = bprintf( "objdump --section-headers %s", xbt_binary_name);
321 fp = popen(command, "r");
324 perror("popen failed");
328 while ((read = xbt_getline(&line, &n, fp)) != -1 && plt_found != 2) {
333 /* Wipeout the new line character */
334 line[read - 1] = '\0';
336 lfields[0] = strtok(line, " ");
338 if(lfields[0] == NULL)
341 if(strcmp(lfields[0], "Sections:") == 0 || strcmp(lfields[0], "Idx") == 0 || strncmp(lfields[0], basename(xbt_binary_name), strlen(xbt_binary_name)) == 0)
344 for (i = 1; i < 7 && lfields[i - 1] != NULL; i++) {
345 lfields[i] = strtok(NULL, " ");
349 if(strcmp(lfields[1], ".plt") == 0){
350 size = strtoul(lfields[2], NULL, 16);
351 start_plt_binary = (void *)strtoul(lfields[3], NULL, 16);
352 end_plt_binary = (char *)start_plt_binary + size;
354 }else if(strcmp(lfields[1], ".got.plt") == 0){
355 size = strtoul(lfields[2], NULL, 16);
356 start_got_plt_binary = (char *)strtoul(lfields[3], NULL, 16);
357 end_got_plt_binary = (char *)start_got_plt_binary + size;
371 static void add_value(xbt_dynar_t *list, const char *type, unsigned long int val){
372 variable_value_t value = xbt_new0(s_variable_value_t, 1);
373 value->type = strdup(type);
374 if(strcmp(type, "value") == 0){
375 value->value.res = val;
377 value->value.address = (void *)val;
379 xbt_dynar_push(*list, &value);
382 static xbt_dynar_t take_snapshot_stacks(mc_snapshot_t *snapshot, void *heap){
384 xbt_dynar_t res = xbt_dynar_new(sizeof(s_mc_snapshot_stack_t), snapshot_stack_free_voidp);
386 unsigned int cursor = 0;
387 stack_region_t current_stack;
389 xbt_dynar_foreach(stacks_areas, cursor, current_stack){
390 mc_snapshot_stack_t st = xbt_new(s_mc_snapshot_stack_t, 1);
391 st->local_variables = get_local_variables_values(current_stack->context, heap);
392 st->stack_pointer = get_stack_pointer(current_stack->context, heap);
393 xbt_dynar_push(res, &st);
394 (*snapshot)->stack_sizes = xbt_realloc((*snapshot)->stack_sizes, (cursor + 1) * sizeof(size_t));
395 (*snapshot)->stack_sizes[cursor] = current_stack->size - ((char *)st->stack_pointer - (char *)((char *)heap + ((char *)current_stack->address - (char *)std_heap)));
402 static void *get_stack_pointer(void *stack_context, void *heap){
408 ret = unw_init_local(&c, (unw_context_t *)stack_context);
410 XBT_INFO("unw_init_local failed");
414 unw_get_reg(&c, UNW_REG_SP, &sp);
416 return ((char *)heap + (size_t)(((char *)((long)sp) - (char*)std_heap)));
420 static xbt_strbuff_t get_local_variables_values(void *stack_context, void *heap){
425 char frame_name[256];
427 ret = unw_init_local(&c, (unw_context_t *)stack_context);
429 XBT_INFO("unw_init_local failed");
433 unw_word_t ip, sp, off;
436 xbt_dynar_t compose = xbt_dynar_new(sizeof(variable_value_t), variable_value_free_voidp);
438 xbt_strbuff_t variables = xbt_strbuff_new();
439 xbt_dict_cursor_t dict_cursor;
441 dw_local_variable_t current_variable;
442 unsigned int cursor = 0, cursor2 = 0;
443 dw_location_entry_t entry = NULL;
444 dw_location_t location_entry = NULL;
447 void *frame_pointer_address = NULL;
453 unw_get_reg(&c, UNW_REG_IP, &ip);
454 unw_get_reg(&c, UNW_REG_SP, &sp);
456 unw_get_proc_name(&c, frame_name, sizeof (frame_name), &off);
458 frame = xbt_dict_get_or_null(mc_local_variables, frame_name);
461 xbt_dynar_free(&compose);
462 xbt_dict_cursor_free(&dict_cursor);
466 to_append = bprintf("ip=%s\n", frame_name);
467 xbt_strbuff_append(variables, to_append);
470 true_ip = (long)frame->low_pc + (long)off;
472 /* Get frame pointer */
473 switch(frame->frame_base->type){
475 while((cursor < xbt_dynar_length(frame->frame_base->location.loclist)) && frame_found == 0){
476 entry = xbt_dynar_get_as(frame->frame_base->location.loclist, cursor, dw_location_entry_t);
477 if((true_ip >= entry->lowpc) && (true_ip < entry->highpc)){
479 switch(entry->location->type){
481 xbt_dynar_reset(compose);
483 while(cursor2 < xbt_dynar_length(entry->location->location.compose)){
484 location_entry = xbt_dynar_get_as(entry->location->location.compose, cursor2, dw_location_t);
485 switch(location_entry->type){
487 unw_get_reg(&c, location_entry->location.reg, &res);
488 add_value(&compose, "address", (long)res);
490 case e_dw_bregister_op:
491 unw_get_reg(&c, location_entry->location.breg_op.reg, &res);
492 add_value(&compose, "address", (long)res + location_entry->location.breg_op.offset);
495 xbt_dynar_reset(compose);
501 if(!xbt_dynar_is_empty(compose)){
502 frame_pointer_address = xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->value.address ;
506 frame_pointer_address = NULL;
514 frame_pointer_address = NULL;
521 xbt_dict_foreach(frame->variables, dict_cursor, variable_name, current_variable){
522 if(current_variable->location != NULL){
523 switch(current_variable->location->type){
525 xbt_dynar_reset(compose);
527 while(cursor < xbt_dynar_length(current_variable->location->location.compose)){
528 location_entry = xbt_dynar_get_as(current_variable->location->location.compose, cursor, dw_location_t);
529 switch(location_entry->type){
531 unw_get_reg(&c, location_entry->location.reg, &res);
532 add_value(&compose, "value", (long)res);
534 case e_dw_bregister_op:
535 unw_get_reg(&c, location_entry->location.breg_op.reg, &res);
536 add_value(&compose, "address", (long)res + location_entry->location.breg_op.offset);
538 case e_dw_fbregister_op:
539 if(frame_pointer_address != NULL)
540 add_value(&compose, "address", (long)((char *)frame_pointer_address + location_entry->location.fbreg_op));
543 xbt_dynar_reset(compose);
549 if(!xbt_dynar_is_empty(compose)){
550 if(strcmp(xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->type, "value") == 0){
551 to_append = bprintf("%s=%lx\n", current_variable->name, xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->value.res);
552 xbt_strbuff_append(variables, to_append);
555 if((long)xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1,variable_value_t)->value.address < 0 || *((void**)xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1,variable_value_t)->value.address) == NULL){
556 to_append = bprintf("%s=NULL\n", current_variable->name);
557 xbt_strbuff_append(variables, to_append);
559 }else if(((long)*((void**)xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1,variable_value_t)->value.address) > 0xffffffff) || ((long)*((void**)xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1,variable_value_t)->value.address) < (long)start_text_binary)){
560 to_append = bprintf("%s=%u\n", current_variable->name, (unsigned int)(long)*((void**)xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->value.address));
561 xbt_strbuff_append(variables, to_append);
564 to_append = bprintf("%s=%p\n", current_variable->name, *((void**)xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->value.address));
565 xbt_strbuff_append(variables, to_append);
570 to_append = bprintf("%s=undefined\n", current_variable->name);
571 xbt_strbuff_append(variables, to_append);
579 to_append = bprintf("%s=undefined\n", current_variable->name);
580 xbt_strbuff_append(variables, to_append);
589 xbt_dynar_free(&compose);
590 xbt_dict_cursor_free(&dict_cursor);
596 static void print_local_variables_values(xbt_dynar_t all_variables){
599 mc_snapshot_stack_t stack;
601 xbt_dynar_foreach(all_variables, cursor, stack){
602 XBT_INFO("%s", stack->local_variables->data);
607 static void snapshot_stack_free(mc_snapshot_stack_t s){
609 xbt_free(s->local_variables->data);
610 xbt_free(s->local_variables);
615 void snapshot_stack_free_voidp(void *s){
616 snapshot_stack_free((mc_snapshot_stack_t) * (void **) s);
619 void *MC_snapshot(void){
621 return simcall_mc_snapshot();
625 void variable_value_free(variable_value_t v){
632 void variable_value_free_voidp(void* v){
633 variable_value_free((variable_value_t) * (void **)v);
636 static xbt_dynar_t take_snapshot_ignore(){
638 if(mc_heap_comparison_ignore == NULL)
641 xbt_dynar_t cpy = xbt_dynar_new(sizeof(mc_heap_ignore_region_t), heap_ignore_region_free_voidp);
643 unsigned int cursor = 0;
644 mc_heap_ignore_region_t current_region;
646 xbt_dynar_foreach(mc_heap_comparison_ignore, cursor, current_region){
647 mc_heap_ignore_region_t new_region = NULL;
648 new_region = xbt_new0(s_mc_heap_ignore_region_t, 1);
649 new_region->address = current_region->address;
650 new_region->size = current_region->size;
651 new_region->block = current_region->block;
652 new_region->fragment = current_region->fragment;
653 xbt_dynar_push(cpy, &new_region);