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;
28 static mc_mem_region_t MC_region_new(int type, void *start_addr, size_t size);
29 static void MC_region_restore(mc_mem_region_t reg);
30 static void MC_region_destroy(mc_mem_region_t reg);
32 static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type, void *start_addr, size_t size);
34 static void add_value(xbt_dynar_t *list, const char *type, unsigned long int val);
35 static xbt_dynar_t take_snapshot_stacks(mc_snapshot_t *s, void *heap);
36 static xbt_strbuff_t get_local_variables_values(void *stack_context, void *heap);
37 static void print_local_variables_values(xbt_dynar_t all_variables);
38 static void *get_stack_pointer(void *stack_context, void *heap);
40 static void snapshot_stack_free(mc_snapshot_stack_t s);
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, "[heap]", 6)){
111 end_raw_heap = reg.end_addr;
115 }else if ((reg.prot & PROT_READ) && (reg.prot & PROT_EXEC)){
116 if (maps->regions[i].pathname != NULL){
117 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
118 start_text_libsimgrid = reg.start_addr;
119 libsimgrid_path = strdup(maps->regions[i].pathname);
120 }else if (!memcmp(basename(maps->regions[i].pathname), basename(xbt_binary_name), strlen(basename(xbt_binary_name)))){
121 start_text_binary = reg.start_addr;
128 free_memory_map(maps);
137 mc_snapshot_t SIMIX_pre_mc_snapshot(smx_simcall_t simcall){
138 return MC_take_snapshot();
141 mc_snapshot_t MC_take_snapshot()
143 int raw_mem = (mmalloc_get_current_heap() == raw_heap);
147 mc_snapshot_t snapshot = xbt_new0(s_mc_snapshot_t, 1);
148 snapshot->nb_processes = xbt_swag_size(simix_global->process_list);
152 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_chunks_used = mmalloc_get_chunks_used(std_heap);
166 heap = snapshot->regions[nb_reg]->data;
171 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
172 size = (char*)reg.end_addr - (char*)reg.start_addr;
173 start = reg.start_addr;
176 reg = maps->regions[i];
177 if(reg.pathname == NULL && (reg.prot & PROT_WRITE) && i < maps->mapsize){
178 size += (char*)reg.end_addr - (char*)reg.start_addr;
179 reg = maps->regions[i];
182 MC_snapshot_add_region(snapshot, 1, start, size);
183 }else if(!memcmp(maps->regions[i].pathname, "[heap]", 6)){
184 end_raw_heap = reg.end_addr;
186 } else if (!memcmp(basename(maps->regions[i].pathname), basename(xbt_binary_name), strlen(basename(xbt_binary_name)))){
187 size = (char*)reg.end_addr - (char*)reg.start_addr;
188 start = reg.start_addr;
191 reg = maps->regions[i];
192 if(reg.pathname == NULL && (reg.prot & PROT_WRITE) && reg.start_addr != std_heap && reg.start_addr != raw_heap && i < maps->mapsize){
193 size += (char*)reg.end_addr - (char*)reg.start_addr;
194 reg = maps->regions[i];
197 MC_snapshot_add_region(snapshot, 2, start, size);
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));
242 void get_libsimgrid_plt_section(){
245 char *line = NULL; /* Temporal storage for each line that is readed */
246 ssize_t read; /* Number of bytes readed */
247 size_t n = 0; /* Amount of bytes to read by getline */
250 int i, plt_found = 0;
251 unsigned long int size, offset;
253 char *command = bprintf("objdump --section-headers %s", libsimgrid_path);
255 fp = popen(command, "r");
258 perror("popen failed");
262 while ((read = getline(&line, &n, fp)) != -1 && plt_found != 2) {
267 /* Wipeout the new line character */
268 line[read - 1] = '\0';
270 lfields[0] = strtok(line, " ");
272 if(lfields[0] == NULL)
275 if(strcmp(lfields[0], "Sections:") == 0 || strcmp(lfields[0], "Idx") == 0 || strncmp(lfields[0], libsimgrid_path, strlen(libsimgrid_path)) == 0)
278 for (i = 1; i < 7 && lfields[i - 1] != NULL; i++) {
279 lfields[i] = strtok(NULL, " ");
283 if(strcmp(lfields[1], ".plt") == 0){
284 size = strtoul(lfields[2], NULL, 16);
285 offset = strtoul(lfields[5], NULL, 16);
286 start_plt_libsimgrid = (char *)start_text_libsimgrid + offset;
287 end_plt_libsimgrid = (char *)start_plt_libsimgrid + size;
289 }else if(strcmp(lfields[1], ".got.plt") == 0){
290 size = strtoul(lfields[2], NULL, 16);
291 offset = strtoul(lfields[5], NULL, 16);
292 start_got_plt_libsimgrid = (char *)start_text_libsimgrid + offset;
293 end_got_plt_libsimgrid = (char *)start_got_plt_libsimgrid + size;
307 void get_binary_plt_section(){
310 char *line = NULL; /* Temporal storage for each line that is readed */
311 ssize_t read; /* Number of bytes readed */
312 size_t n = 0; /* Amount of bytes to read by getline */
315 int i, plt_found = 0;
316 unsigned long int size;
318 char *command = bprintf( "objdump --section-headers %s", xbt_binary_name);
320 fp = popen(command, "r");
323 perror("popen failed");
327 while ((read = getline(&line, &n, fp)) != -1 && plt_found != 2) {
332 /* Wipeout the new line character */
333 line[read - 1] = '\0';
335 lfields[0] = strtok(line, " ");
337 if(lfields[0] == NULL)
340 if(strcmp(lfields[0], "Sections:") == 0 || strcmp(lfields[0], "Idx") == 0 || strncmp(lfields[0], basename(xbt_binary_name), strlen(xbt_binary_name)) == 0)
343 for (i = 1; i < 7 && lfields[i - 1] != NULL; i++) {
344 lfields[i] = strtok(NULL, " ");
348 if(strcmp(lfields[1], ".plt") == 0){
349 size = strtoul(lfields[2], NULL, 16);
350 start_plt_binary = (void *)strtoul(lfields[3], NULL, 16);
351 end_plt_binary = (char *)start_plt_binary + size;
353 }else if(strcmp(lfields[1], ".got.plt") == 0){
354 size = strtoul(lfields[2], NULL, 16);
355 start_got_plt_binary = (char *)strtoul(lfields[3], NULL, 16);
356 end_got_plt_binary = (char *)start_got_plt_binary + size;
370 static void add_value(xbt_dynar_t *list, const char *type, unsigned long int val){
371 variable_value_t value = xbt_new0(s_variable_value_t, 1);
372 value->type = strdup(type);
373 if(strcmp(type, "value") == 0){
374 value->value.res = val;
376 value->value.address = (void *)val;
378 xbt_dynar_push(*list, &value);
381 static xbt_dynar_t take_snapshot_stacks(mc_snapshot_t *snapshot, void *heap){
383 xbt_dynar_t res = xbt_dynar_new(sizeof(s_mc_snapshot_stack_t), snapshot_stack_free_voidp);
385 unsigned int cursor = 0;
386 stack_region_t current_stack;
388 xbt_dynar_foreach(stacks_areas, cursor, current_stack){
389 mc_snapshot_stack_t st = xbt_new(s_mc_snapshot_stack_t, 1);
390 st->local_variables = get_local_variables_values(current_stack->context, heap);
391 st->stack_pointer = get_stack_pointer(current_stack->context, heap);
392 xbt_dynar_push(res, &st);
393 (*snapshot)->stack_sizes = xbt_realloc((*snapshot)->stack_sizes, (cursor + 1) * sizeof(size_t));
394 (*snapshot)->stack_sizes[cursor] = current_stack->size - ((char *)st->stack_pointer - (char *)((char *)heap + ((char *)current_stack->address - (char *)std_heap)));
401 static void *get_stack_pointer(void *stack_context, void *heap){
407 ret = unw_init_local(&c, (unw_context_t *)stack_context);
409 XBT_INFO("unw_init_local failed");
413 unw_get_reg(&c, UNW_REG_SP, &sp);
415 return ((char *)heap + (size_t)(((char *)((long)sp) - (char*)std_heap)));
419 static xbt_strbuff_t get_local_variables_values(void *stack_context, void *heap){
424 char frame_name[256];
426 ret = unw_init_local(&c, (unw_context_t *)stack_context);
428 XBT_INFO("unw_init_local failed");
432 unw_word_t ip, sp, off;
435 xbt_dynar_t compose = xbt_dynar_new(sizeof(variable_value_t), variable_value_free_voidp);
437 xbt_strbuff_t variables = xbt_strbuff_new();
438 xbt_dict_cursor_t dict_cursor;
440 dw_local_variable_t current_variable;
441 unsigned int cursor = 0, cursor2 = 0;
442 dw_location_entry_t entry = NULL;
443 dw_location_t location_entry = NULL;
446 void *frame_pointer_address = NULL;
452 unw_get_reg(&c, UNW_REG_IP, &ip);
453 unw_get_reg(&c, UNW_REG_SP, &sp);
455 unw_get_proc_name(&c, frame_name, sizeof (frame_name), &off);
457 frame = xbt_dict_get_or_null(mc_local_variables, frame_name);
460 xbt_dynar_free(&compose);
461 xbt_dict_cursor_free(&dict_cursor);
465 to_append = bprintf("ip=%s\n", frame_name);
466 xbt_strbuff_append(variables, to_append);
469 true_ip = (long)frame->low_pc + (long)off;
471 /* Get frame pointer */
472 switch(frame->frame_base->type){
474 while((cursor < xbt_dynar_length(frame->frame_base->location.loclist)) && frame_found == 0){
475 entry = xbt_dynar_get_as(frame->frame_base->location.loclist, cursor, dw_location_entry_t);
476 if((true_ip >= entry->lowpc) && (true_ip < entry->highpc)){
478 switch(entry->location->type){
480 xbt_dynar_reset(compose);
482 while(cursor2 < xbt_dynar_length(entry->location->location.compose)){
483 location_entry = xbt_dynar_get_as(entry->location->location.compose, cursor2, dw_location_t);
484 switch(location_entry->type){
486 unw_get_reg(&c, location_entry->location.reg, &res);
487 add_value(&compose, "address", (long)res);
489 case e_dw_bregister_op:
490 unw_get_reg(&c, location_entry->location.breg_op.reg, &res);
491 add_value(&compose, "address", (long)res + location_entry->location.breg_op.offset);
494 xbt_dynar_reset(compose);
500 if(xbt_dynar_length(compose) > 0){
501 frame_pointer_address = xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->value.address ;
505 frame_pointer_address = NULL;
513 frame_pointer_address = NULL;
520 xbt_dict_foreach(frame->variables, dict_cursor, variable_name, current_variable){
521 if(current_variable->location != NULL){
522 switch(current_variable->location->type){
524 xbt_dynar_reset(compose);
526 while(cursor < xbt_dynar_length(current_variable->location->location.compose)){
527 location_entry = xbt_dynar_get_as(current_variable->location->location.compose, cursor, dw_location_t);
528 switch(location_entry->type){
530 unw_get_reg(&c, location_entry->location.reg, &res);
531 add_value(&compose, "value", (long)res);
533 case e_dw_bregister_op:
534 unw_get_reg(&c, location_entry->location.breg_op.reg, &res);
535 add_value(&compose, "address", (long)res + location_entry->location.breg_op.offset);
537 case e_dw_fbregister_op:
538 if(frame_pointer_address != NULL)
539 add_value(&compose, "address", (long)((char *)frame_pointer_address + location_entry->location.fbreg_op));
542 xbt_dynar_reset(compose);
548 if(xbt_dynar_length(compose) > 0){
549 if(strcmp(xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->type, "value") == 0){
550 to_append = bprintf("%s=%lx\n", current_variable->name, xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->value.res);
551 xbt_strbuff_append(variables, to_append);
554 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){
555 to_append = bprintf("%s=NULL\n", current_variable->name);
556 xbt_strbuff_append(variables, to_append);
558 }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)){
559 to_append = bprintf("%s=%d\n", current_variable->name, (int)(long)*((void**)xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->value.address));
560 xbt_strbuff_append(variables, to_append);
563 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));
564 xbt_strbuff_append(variables, to_append);
569 to_append = bprintf("%s=undefined\n", current_variable->name);
570 xbt_strbuff_append(variables, to_append);
578 to_append = bprintf("%s=undefined\n", current_variable->name);
579 xbt_strbuff_append(variables, to_append);
588 xbt_dynar_free(&compose);
589 xbt_dict_cursor_free(&dict_cursor);
595 static void print_local_variables_values(xbt_dynar_t all_variables){
598 mc_snapshot_stack_t stack;
600 xbt_dynar_foreach(all_variables, cursor, stack){
601 XBT_INFO("%s", stack->local_variables->data);
606 static void snapshot_stack_free(mc_snapshot_stack_t s){
608 xbt_free(s->local_variables->data);
609 xbt_free(s->local_variables);
614 void snapshot_stack_free_voidp(void *s){
615 snapshot_stack_free((mc_snapshot_stack_t) * (void **) s);
618 void *MC_snapshot(void){
620 return simcall_mc_snapshot();
624 void variable_value_free(variable_value_t v){
631 void variable_value_free_voidp(void* v){
632 variable_value_free((variable_value_t) * (void **)v);