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_plt_binary, *end_plt_binary;
20 char *libsimgrid_path;
21 void *start_data_libsimgrid;
22 void *start_text_binary;
25 static mc_mem_region_t MC_region_new(int type, void *start_addr, size_t size);
26 static void MC_region_restore(mc_mem_region_t reg);
27 static void MC_region_destroy(mc_mem_region_t reg);
29 static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type, void *start_addr, size_t size);
31 static void add_value(xbt_dynar_t *list, const char *type, unsigned long int val);
32 static xbt_dynar_t take_snapshot_stacks(void *heap);
33 static xbt_strbuff_t get_local_variables_values(void *stack_context, void *heap);
34 static void print_local_variables_values(xbt_dynar_t all_variables);
35 static void *get_stack_pointer(void *stack_context, void *heap);
37 static void snapshot_stack_free(mc_snapshot_stack_t s);
39 static mc_mem_region_t MC_region_new(int type, void *start_addr, size_t size)
41 mc_mem_region_t new_reg = xbt_new0(s_mc_mem_region_t, 1);
43 new_reg->start_addr = start_addr;
45 new_reg->data = xbt_malloc0(size);
46 memcpy(new_reg->data, start_addr, size);
48 XBT_DEBUG("New region : type : %d, data : %p, size : %zu", type, new_reg->data, size);
53 static void MC_region_restore(mc_mem_region_t reg)
55 /*FIXME: check if start_addr is still mapped, if it is not, then map it
56 before copying the data */
58 memcpy(reg->start_addr, reg->data, reg->size);
63 static void MC_region_destroy(mc_mem_region_t reg)
69 static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type, void *start_addr, size_t size)
71 mc_mem_region_t new_reg = MC_region_new(type, start_addr, size);
72 snapshot->regions = xbt_realloc(snapshot->regions, (snapshot->num_reg + 1) * sizeof(mc_mem_region_t));
73 snapshot->regions[snapshot->num_reg] = new_reg;
78 void MC_take_snapshot(mc_snapshot_t snapshot)
82 memory_map_t maps = get_memory_map();
84 /* Save the std heap and the writable mapped pages of libsimgrid */
85 while (i < maps->mapsize) {
86 reg = maps->regions[i];
87 if ((reg.prot & PROT_WRITE)){
88 if (maps->regions[i].pathname == NULL){
89 if (reg.start_addr == std_heap){ // only save the std heap (and not the raw one)
90 MC_snapshot_add_region(snapshot, 0, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
94 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
95 MC_snapshot_add_region(snapshot, 1, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
97 reg = maps->regions[i];
98 while(reg.pathname == NULL && (reg.prot & PROT_WRITE) && i < maps->mapsize){
99 MC_snapshot_add_region(snapshot, 1, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
101 reg = maps->regions[i];
112 free_memory_map(maps);
115 void MC_init_memory_map_info(){
117 raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
123 memory_map_t maps = get_memory_map();
125 while (i < maps->mapsize) {
126 reg = maps->regions[i];
127 if ((reg.prot & PROT_WRITE)){
128 if (maps->regions[i].pathname == NULL){
129 if(reg.start_addr == raw_heap){
130 end_raw_heap = reg.end_addr;
133 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
134 start_data_libsimgrid = reg.start_addr;
137 }else if ((reg.prot & PROT_READ)){
138 if (maps->regions[i].pathname != NULL){
139 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
140 start_text_libsimgrid = reg.start_addr;
141 libsimgrid_path = strdup(maps->regions[i].pathname);
143 if (!memcmp(basename(maps->regions[i].pathname), basename(xbt_binary_name), strlen(basename(xbt_binary_name)))){
144 start_text_binary = reg.start_addr;
152 free_memory_map(maps);
161 mc_snapshot_t MC_take_snapshot_liveness()
164 raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
168 mc_snapshot_t snapshot = xbt_new0(s_mc_snapshot_t, 1);
172 memory_map_t maps = get_memory_map();
176 /* Save the std heap and the writable mapped pages of libsimgrid */
177 while (i < maps->mapsize) {
178 reg = maps->regions[i];
179 if ((reg.prot & PROT_WRITE)){
180 if (maps->regions[i].pathname == NULL){
181 if (reg.start_addr == std_heap){ // only save the std heap (and not the raw one)
182 MC_snapshot_add_region(snapshot, 0, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
183 heap = snapshot->regions[nb_reg]->data;
185 }else if(reg.start_addr == raw_heap){
186 end_raw_heap = reg.end_addr;
190 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
191 MC_snapshot_add_region(snapshot, 1, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
192 start_data_libsimgrid = reg.start_addr;
195 reg = maps->regions[i];
196 while(reg.pathname == NULL && (reg.prot & PROT_WRITE) && i < maps->mapsize){
197 MC_snapshot_add_region(snapshot, 1, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
199 reg = maps->regions[i];
203 if (!memcmp(basename(maps->regions[i].pathname), basename(xbt_binary_name), strlen(basename(xbt_binary_name)))){
204 MC_snapshot_add_region(snapshot, 2, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
210 }else if ((reg.prot & PROT_READ)){
211 if (maps->regions[i].pathname != NULL){
212 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
213 start_text_libsimgrid = reg.start_addr;
214 libsimgrid_path = strdup(maps->regions[i].pathname);
216 if (!memcmp(basename(maps->regions[i].pathname), basename(xbt_binary_name), strlen(basename(xbt_binary_name)))){
217 start_text_binary = reg.start_addr;
227 snapshot->stacks = take_snapshot_stacks(heap);
229 free_memory_map(maps);
240 void MC_restore_snapshot(mc_snapshot_t snapshot)
243 for(i=0; i < snapshot->num_reg; i++){
244 MC_region_restore(snapshot->regions[i]);
249 void MC_free_snapshot(mc_snapshot_t snapshot)
252 for(i=0; i < snapshot->num_reg; i++)
253 MC_region_destroy(snapshot->regions[i]);
255 xbt_dynar_free(&(snapshot->stacks));
260 void get_libsimgrid_plt_section(){
263 char *line = NULL; /* Temporal storage for each line that is readed */
264 ssize_t read; /* Number of bytes readed */
265 size_t n = 0; /* Amount of bytes to read by getline */
268 int i, plt_not_found = 1;
269 unsigned long int size, offset;
271 if(libsimgrid_path == NULL)
272 libsimgrid_path = get_libsimgrid_path();
274 char *command = bprintf("objdump --section-headers %s", libsimgrid_path);
276 fp = popen(command, "r");
279 perror("popen failed");
281 while ((read = getline(&line, &n, fp)) != -1 && plt_not_found == 1) {
286 /* Wipeout the new line character */
287 line[read - 1] = '\0';
289 lfields[0] = strtok(line, " ");
291 if(lfields[0] == NULL)
294 if(strcmp(lfields[0], "Sections:") == 0 || strcmp(lfields[0], "Idx") == 0 || strncmp(lfields[0], libsimgrid_path, strlen(libsimgrid_path)) == 0)
297 for (i = 1; i < 7 && lfields[i - 1] != NULL; i++) {
298 lfields[i] = strtok(NULL, " ");
302 if(strcmp(lfields[1], ".plt") == 0){
303 size = strtoul(lfields[2], NULL, 16);
304 offset = strtoul(lfields[5], NULL, 16);
305 start_plt_libsimgrid = (char *)start_text_libsimgrid + offset;
306 end_plt_libsimgrid = (char *)start_plt_libsimgrid + size;
319 void get_binary_plt_section(){
322 char *line = NULL; /* Temporal storage for each line that is readed */
323 ssize_t read; /* Number of bytes readed */
324 size_t n = 0; /* Amount of bytes to read by getline */
327 int i, plt_not_found = 1;
328 unsigned long int size, offset;
330 char *command = bprintf( "objdump --section-headers %s", xbt_binary_name);
332 fp = popen(command, "r");
335 perror("popen failed");
337 while ((read = getline(&line, &n, fp)) != -1 && plt_not_found == 1) {
342 /* Wipeout the new line character */
343 line[read - 1] = '\0';
345 lfields[0] = strtok(line, " ");
347 if(lfields[0] == NULL)
350 if(strcmp(lfields[0], "Sections:") == 0 || strcmp(lfields[0], "Idx") == 0 || strncmp(lfields[0], basename(xbt_binary_name), strlen(xbt_binary_name)) == 0)
353 for (i = 1; i < 7 && lfields[i - 1] != NULL; i++) {
354 lfields[i] = strtok(NULL, " ");
358 if(strcmp(lfields[1], ".plt") == 0){
359 size = strtoul(lfields[2], NULL, 16);
360 offset = strtoul(lfields[5], NULL, 16);
361 start_plt_binary = (char *)start_text_binary + offset;
362 end_plt_binary = (char *)start_plt_binary + size;
376 static void add_value(xbt_dynar_t *list, const char *type, unsigned long int val){
377 variable_value_t value = xbt_new0(s_variable_value_t, 1);
378 value->type = strdup(type);
379 if(strcmp(type, "value") == 0){
380 value->value.res = val;
382 value->value.address = (void *)val;
384 xbt_dynar_push(*list, &value);
387 static xbt_dynar_t take_snapshot_stacks(void *heap){
389 xbt_dynar_t res = xbt_dynar_new(sizeof(s_mc_snapshot_stack_t), NULL);
391 unsigned int cursor1 = 0;
392 stack_region_t current_stack;
394 xbt_dynar_foreach(stacks_areas, cursor1, current_stack){
395 mc_snapshot_stack_t st = xbt_new(s_mc_snapshot_stack_t, 1);
396 st->local_variables = get_local_variables_values(current_stack->context, heap);
397 st->stack_pointer = get_stack_pointer(current_stack->context, heap);
398 xbt_dynar_push(res, &st);
405 static void *get_stack_pointer(void *stack_context, void *heap){
411 ret = unw_init_local(&c, (unw_context_t *)stack_context);
413 XBT_INFO("unw_init_local failed");
417 unw_get_reg(&c, UNW_REG_SP, &sp);
419 return ((char *)heap + (size_t)(((char *)((long)sp) - (char*)std_heap)));
423 static xbt_strbuff_t get_local_variables_values(void *stack_context, void *heap){
429 char frame_name[256];
431 ret = unw_init_local(&c, (unw_context_t *)stack_context);
433 XBT_INFO("unw_init_local failed");
437 //stack_name = strdup(((smx_process_t)((smx_ctx_sysv_t)(stack->address))->super.data)->name);
439 unw_word_t ip, sp, off;
442 xbt_dynar_t compose = xbt_dynar_new(sizeof(variable_value_t), NULL);
444 xbt_strbuff_t variables = xbt_strbuff_new();
445 xbt_dict_cursor_t dict_cursor;
447 dw_local_variable_t current_variable;
448 unsigned int cursor = 0, cursor2 = 0;
449 dw_location_entry_t entry = NULL;
450 dw_location_t location_entry = NULL;
453 void *frame_pointer_address = NULL;
458 unw_get_reg(&c, UNW_REG_IP, &ip);
459 unw_get_reg(&c, UNW_REG_SP, &sp);
461 unw_get_proc_name (&c, frame_name, sizeof (frame_name), &off);
463 xbt_strbuff_append(variables, bprintf("ip=%s\n", frame_name));
465 frame = xbt_dict_get_or_null(mc_local_variables, frame_name);
472 true_ip = (long)frame->low_pc + (long)off;
474 /* Get frame pointer */
475 switch(frame->frame_base->type){
477 while((cursor < xbt_dynar_length(frame->frame_base->location.loclist)) && frame_found == 0){
478 entry = xbt_dynar_get_as(frame->frame_base->location.loclist, cursor, dw_location_entry_t);
479 if((true_ip >= entry->lowpc) && (true_ip < entry->highpc)){
481 switch(entry->location->type){
483 xbt_dynar_reset(compose);
485 while(cursor2 < xbt_dynar_length(entry->location->location.compose)){
486 location_entry = xbt_dynar_get_as(entry->location->location.compose, cursor2, dw_location_t);
487 switch(location_entry->type){
489 unw_get_reg(&c, location_entry->location.reg, &res);
490 add_value(&compose, "address", (long)res);
492 case e_dw_bregister_op:
493 unw_get_reg(&c, location_entry->location.breg_op.reg, &res);
494 add_value(&compose, "address", (long)res + location_entry->location.breg_op.offset);
497 xbt_dynar_reset(compose);
503 if(xbt_dynar_length(compose) > 0){
504 frame_pointer_address = xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->value.address ;
508 frame_pointer_address = NULL;
516 frame_pointer_address = NULL;
523 //XBT_INFO("Frame %s", frame->name);
525 xbt_dict_foreach(frame->variables, dict_cursor, variable_name, current_variable){
526 if(current_variable->location != NULL){
527 switch(current_variable->location->type){
529 xbt_dynar_reset(compose);
531 while(cursor < xbt_dynar_length(current_variable->location->location.compose)){
532 location_entry = xbt_dynar_get_as(current_variable->location->location.compose, cursor, dw_location_t);
533 switch(location_entry->type){
535 unw_get_reg(&c, location_entry->location.reg, &res);
536 add_value(&compose, "value", (long)res);
538 case e_dw_bregister_op:
539 unw_get_reg(&c, location_entry->location.breg_op.reg, &res);
540 add_value(&compose, "address", (long)res + location_entry->location.breg_op.offset);
542 case e_dw_fbregister_op:
543 if(frame_pointer_address != NULL)
544 add_value(&compose, "address", (long)((char *)frame_pointer_address + location_entry->location.fbreg_op));
547 xbt_dynar_reset(compose);
553 if(xbt_dynar_length(compose) > 0){
554 if(strcmp(xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->type, "value") == 0){
555 //XBT_INFO("Variable : %s - value : %lx", current_variable->name, xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->value.res);
556 xbt_strbuff_append(variables, bprintf("%s=%lx\n", current_variable->name, xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->value.res));
558 if(*((void**)xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1,variable_value_t)->value.address) == NULL){
559 //XBT_INFO("Variable : %s - address : NULL", current_variable->name);
560 xbt_strbuff_append(variables, bprintf("%s=NULL\n", current_variable->name));
561 }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)){
562 //XBT_INFO("Variable : %s - value : %zd", current_variable->name, (size_t)*((void**)xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->value.address));
563 xbt_strbuff_append(variables, 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)));
565 //XBT_INFO("Variable : %s - address : %p", current_variable->name, *((void**)xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->value.address));
566 xbt_strbuff_append(variables, bprintf("%s=%p\n", current_variable->name, *((void**)xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->value.address)));
570 //XBT_INFO("Variable %s undefined", current_variable->name);
571 xbt_strbuff_append(variables, bprintf("%s=undefined\n", current_variable->name));
578 //XBT_INFO("Variable : %s, no location", current_variable->name);
579 xbt_strbuff_append(variables, bprintf("%s=undefined\n", current_variable->name));
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);