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, *start_bss_libsimgrid;
22 void *start_data_binary, *start_bss_binary;
23 void *start_text_binary;
26 static mc_mem_region_t MC_region_new(int type, void *start_addr, size_t size);
27 static void MC_region_restore(mc_mem_region_t reg);
28 static void MC_region_destroy(mc_mem_region_t reg);
30 static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type, void *start_addr, size_t size);
32 static void add_value(xbt_dynar_t *list, const char *type, unsigned long int val);
33 static xbt_dynar_t take_snapshot_stacks(void *heap);
34 static xbt_strbuff_t get_local_variables_values(void *stack_context, void *heap);
35 static void print_local_variables_values(xbt_dynar_t all_variables);
36 static void *get_stack_pointer(void *stack_context, void *heap);
38 static void snapshot_stack_free(mc_snapshot_stack_t s);
40 static mc_mem_region_t MC_region_new(int type, void *start_addr, size_t size)
42 mc_mem_region_t new_reg = xbt_new0(s_mc_mem_region_t, 1);
44 new_reg->start_addr = start_addr;
46 new_reg->data = xbt_malloc0(size);
47 memcpy(new_reg->data, start_addr, size);
49 XBT_DEBUG("New region : type : %d, data : %p, size : %zu", type, new_reg->data, size);
54 static void MC_region_restore(mc_mem_region_t reg)
56 /*FIXME: check if start_addr is still mapped, if it is not, then map it
57 before copying the data */
59 memcpy(reg->start_addr, reg->data, reg->size);
64 static void MC_region_destroy(mc_mem_region_t reg)
70 static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type, void *start_addr, size_t size)
72 mc_mem_region_t new_reg = MC_region_new(type, start_addr, size);
73 snapshot->regions = xbt_realloc(snapshot->regions, (snapshot->num_reg + 1) * sizeof(mc_mem_region_t));
74 snapshot->regions[snapshot->num_reg] = new_reg;
79 /* void MC_take_snapshot(mc_snapshot_t snapshot) */
81 /* unsigned int i = 0; */
82 /* s_map_region_t reg; */
83 /* memory_map_t maps = get_memory_map(); */
85 /* /\* Save the std heap and the writable mapped pages of libsimgrid *\/ */
86 /* while (i < maps->mapsize) { */
87 /* reg = maps->regions[i]; */
88 /* if ((reg.prot & PROT_WRITE)){ */
89 /* if (maps->regions[i].pathname == NULL){ */
90 /* if (reg.start_addr == std_heap){ // only save the std heap (and not the raw one) */
91 /* MC_snapshot_add_region(snapshot, 0, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr); */
95 /* if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){ */
96 /* MC_snapshot_add_region(snapshot, 1, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr); */
98 /* reg = maps->regions[i]; */
99 /* while(reg.pathname == NULL && (reg.prot & PROT_WRITE) && i < maps->mapsize){ */
100 /* MC_snapshot_add_region(snapshot, 1, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr); */
102 /* reg = maps->regions[i]; */
113 /* free_memory_map(maps); */
116 void MC_init_memory_map_info(){
118 int raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
124 memory_map_t maps = get_memory_map();
126 while (i < maps->mapsize) {
127 reg = maps->regions[i];
128 if ((reg.prot & PROT_WRITE)){
129 if (maps->regions[i].pathname == NULL){
130 if(reg.start_addr == raw_heap){
131 end_raw_heap = reg.end_addr;
134 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
135 start_data_libsimgrid = reg.start_addr;
137 reg = maps->regions[i];
138 if(reg.pathname == NULL && (reg.prot & PROT_WRITE) && i < maps->mapsize)
139 start_bss_libsimgrid = reg.start_addr;
140 }else if (!memcmp(basename(maps->regions[i].pathname), basename(xbt_binary_name), strlen(basename(xbt_binary_name)))){
141 start_data_binary = reg.start_addr;
143 reg = maps->regions[i];
144 if(reg.pathname == NULL && (reg.prot & PROT_WRITE) && reg.start_addr != std_heap && reg.start_addr != raw_heap && i < maps->mapsize){
145 start_bss_binary = reg.start_addr;
150 }else if ((reg.prot & PROT_READ)){
151 if (maps->regions[i].pathname != NULL){
152 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
153 start_text_libsimgrid = reg.start_addr;
154 libsimgrid_path = strdup(maps->regions[i].pathname);
156 if (!memcmp(basename(maps->regions[i].pathname), basename(xbt_binary_name), strlen(basename(xbt_binary_name)))){
157 start_text_binary = reg.start_addr;
165 free_memory_map(maps);
174 mc_snapshot_t MC_take_snapshot()
177 int raw_mem = (mmalloc_get_current_heap() == raw_heap);
181 mc_snapshot_t snapshot = xbt_new0(s_mc_snapshot_t, 1);
185 memory_map_t maps = get_memory_map();
189 /* Save the std heap and the writable mapped pages of libsimgrid */
190 while (i < maps->mapsize) {
191 reg = maps->regions[i];
192 if ((reg.prot & PROT_WRITE)){
193 if (maps->regions[i].pathname == NULL){
194 if (reg.start_addr == std_heap){ // only save the std heap (and not the raw one)
195 MC_snapshot_add_region(snapshot, 0, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
196 heap = snapshot->regions[nb_reg]->data;
198 }else if(reg.start_addr == raw_heap){
199 end_raw_heap = reg.end_addr;
203 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
204 MC_snapshot_add_region(snapshot, 1, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
205 start_data_libsimgrid = reg.start_addr;
208 reg = maps->regions[i];
209 if(reg.pathname == NULL && (reg.prot & PROT_WRITE) && i < maps->mapsize){
210 MC_snapshot_add_region(snapshot, 1, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
211 reg = maps->regions[i];
216 if (!memcmp(basename(maps->regions[i].pathname), basename(xbt_binary_name), strlen(basename(xbt_binary_name)))){
217 MC_snapshot_add_region(snapshot, 2, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
220 reg = maps->regions[i];
221 if(reg.pathname == NULL && (reg.prot & PROT_WRITE) && reg.start_addr != std_heap && reg.start_addr != raw_heap && i < maps->mapsize){
222 MC_snapshot_add_region(snapshot, 2, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
223 reg = maps->regions[i];
231 }else if ((reg.prot & PROT_READ)){
232 if (maps->regions[i].pathname != NULL){
233 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
234 start_text_libsimgrid = reg.start_addr;
235 libsimgrid_path = strdup(maps->regions[i].pathname);
237 if (!memcmp(basename(maps->regions[i].pathname), basename(xbt_binary_name), strlen(basename(xbt_binary_name)))){
238 start_text_binary = reg.start_addr;
248 if(_surf_mc_stateful > 0 || _surf_mc_property_file)
249 snapshot->stacks = take_snapshot_stacks(heap);
251 free_memory_map(maps);
262 void MC_restore_snapshot(mc_snapshot_t snapshot)
265 for(i=0; i < snapshot->num_reg; i++){
266 MC_region_restore(snapshot->regions[i]);
271 void MC_free_snapshot(mc_snapshot_t snapshot)
274 for(i=0; i < snapshot->num_reg; i++)
275 MC_region_destroy(snapshot->regions[i]);
277 xbt_dynar_free(&(snapshot->stacks));
282 void get_libsimgrid_plt_section(){
285 char *line = NULL; /* Temporal storage for each line that is readed */
286 ssize_t read; /* Number of bytes readed */
287 size_t n = 0; /* Amount of bytes to read by getline */
290 int i, plt_not_found = 1;
291 unsigned long int size, offset;
293 if(libsimgrid_path == NULL)
294 libsimgrid_path = get_libsimgrid_path();
296 char *command = bprintf("objdump --section-headers %s", libsimgrid_path);
298 fp = popen(command, "r");
301 perror("popen failed");
303 while ((read = getline(&line, &n, fp)) != -1 && plt_not_found == 1) {
308 /* Wipeout the new line character */
309 line[read - 1] = '\0';
311 lfields[0] = strtok(line, " ");
313 if(lfields[0] == NULL)
316 if(strcmp(lfields[0], "Sections:") == 0 || strcmp(lfields[0], "Idx") == 0 || strncmp(lfields[0], libsimgrid_path, strlen(libsimgrid_path)) == 0)
319 for (i = 1; i < 7 && lfields[i - 1] != NULL; i++) {
320 lfields[i] = strtok(NULL, " ");
324 if(strcmp(lfields[1], ".plt") == 0){
325 size = strtoul(lfields[2], NULL, 16);
326 offset = strtoul(lfields[5], NULL, 16);
327 start_plt_libsimgrid = (char *)start_text_libsimgrid + offset;
328 end_plt_libsimgrid = (char *)start_plt_libsimgrid + size;
341 void get_binary_plt_section(){
344 char *line = NULL; /* Temporal storage for each line that is readed */
345 ssize_t read; /* Number of bytes readed */
346 size_t n = 0; /* Amount of bytes to read by getline */
349 int i, plt_not_found = 1;
350 unsigned long int size, offset;
352 char *command = bprintf( "objdump --section-headers %s", xbt_binary_name);
354 fp = popen(command, "r");
357 perror("popen failed");
359 while ((read = getline(&line, &n, fp)) != -1 && plt_not_found == 1) {
364 /* Wipeout the new line character */
365 line[read - 1] = '\0';
367 lfields[0] = strtok(line, " ");
369 if(lfields[0] == NULL)
372 if(strcmp(lfields[0], "Sections:") == 0 || strcmp(lfields[0], "Idx") == 0 || strncmp(lfields[0], basename(xbt_binary_name), strlen(xbt_binary_name)) == 0)
375 for (i = 1; i < 7 && lfields[i - 1] != NULL; i++) {
376 lfields[i] = strtok(NULL, " ");
380 if(strcmp(lfields[1], ".plt") == 0){
381 size = strtoul(lfields[2], NULL, 16);
382 offset = strtoul(lfields[5], NULL, 16);
383 start_plt_binary = (char *)start_text_binary + offset;
384 end_plt_binary = (char *)start_plt_binary + size;
398 static void add_value(xbt_dynar_t *list, const char *type, unsigned long int val){
399 variable_value_t value = xbt_new0(s_variable_value_t, 1);
400 value->type = strdup(type);
401 if(strcmp(type, "value") == 0){
402 value->value.res = val;
404 value->value.address = (void *)val;
406 xbt_dynar_push(*list, &value);
409 static xbt_dynar_t take_snapshot_stacks(void *heap){
411 xbt_dynar_t res = xbt_dynar_new(sizeof(s_mc_snapshot_stack_t), NULL);
413 unsigned int cursor1 = 0;
414 stack_region_t current_stack;
416 xbt_dynar_foreach(stacks_areas, cursor1, current_stack){
417 mc_snapshot_stack_t st = xbt_new(s_mc_snapshot_stack_t, 1);
418 st->local_variables = get_local_variables_values(current_stack->context, heap);
419 st->stack_pointer = get_stack_pointer(current_stack->context, heap);
420 xbt_dynar_push(res, &st);
427 static void *get_stack_pointer(void *stack_context, void *heap){
433 ret = unw_init_local(&c, (unw_context_t *)stack_context);
435 XBT_INFO("unw_init_local failed");
439 unw_get_reg(&c, UNW_REG_SP, &sp);
441 return ((char *)heap + (size_t)(((char *)((long)sp) - (char*)std_heap)));
445 static xbt_strbuff_t get_local_variables_values(void *stack_context, void *heap){
451 char frame_name[256];
453 ret = unw_init_local(&c, (unw_context_t *)stack_context);
455 XBT_INFO("unw_init_local failed");
459 //stack_name = strdup(((smx_process_t)((smx_ctx_sysv_t)(stack->address))->super.data)->name);
461 unw_word_t ip, sp, off;
464 xbt_dynar_t compose = xbt_dynar_new(sizeof(variable_value_t), NULL);
466 xbt_strbuff_t variables = xbt_strbuff_new();
467 xbt_dict_cursor_t dict_cursor;
469 dw_local_variable_t current_variable;
470 unsigned int cursor = 0, cursor2 = 0;
471 dw_location_entry_t entry = NULL;
472 dw_location_t location_entry = NULL;
475 void *frame_pointer_address = NULL;
480 unw_get_reg(&c, UNW_REG_IP, &ip);
481 unw_get_reg(&c, UNW_REG_SP, &sp);
483 unw_get_proc_name (&c, frame_name, sizeof (frame_name), &off);
485 xbt_strbuff_append(variables, bprintf("ip=%s\n", frame_name));
487 frame = xbt_dict_get_or_null(mc_local_variables, frame_name);
494 true_ip = (long)frame->low_pc + (long)off;
496 /* Get frame pointer */
497 switch(frame->frame_base->type){
499 while((cursor < xbt_dynar_length(frame->frame_base->location.loclist)) && frame_found == 0){
500 entry = xbt_dynar_get_as(frame->frame_base->location.loclist, cursor, dw_location_entry_t);
501 if((true_ip >= entry->lowpc) && (true_ip < entry->highpc)){
503 switch(entry->location->type){
505 xbt_dynar_reset(compose);
507 while(cursor2 < xbt_dynar_length(entry->location->location.compose)){
508 location_entry = xbt_dynar_get_as(entry->location->location.compose, cursor2, dw_location_t);
509 switch(location_entry->type){
511 unw_get_reg(&c, location_entry->location.reg, &res);
512 add_value(&compose, "address", (long)res);
514 case e_dw_bregister_op:
515 unw_get_reg(&c, location_entry->location.breg_op.reg, &res);
516 add_value(&compose, "address", (long)res + location_entry->location.breg_op.offset);
519 xbt_dynar_reset(compose);
525 if(xbt_dynar_length(compose) > 0){
526 frame_pointer_address = xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->value.address ;
530 frame_pointer_address = NULL;
538 frame_pointer_address = NULL;
545 //XBT_INFO("Frame %s", frame->name);
547 xbt_dict_foreach(frame->variables, dict_cursor, variable_name, current_variable){
548 if(current_variable->location != NULL){
549 switch(current_variable->location->type){
551 xbt_dynar_reset(compose);
553 while(cursor < xbt_dynar_length(current_variable->location->location.compose)){
554 location_entry = xbt_dynar_get_as(current_variable->location->location.compose, cursor, dw_location_t);
555 switch(location_entry->type){
557 unw_get_reg(&c, location_entry->location.reg, &res);
558 add_value(&compose, "value", (long)res);
560 case e_dw_bregister_op:
561 unw_get_reg(&c, location_entry->location.breg_op.reg, &res);
562 add_value(&compose, "address", (long)res + location_entry->location.breg_op.offset);
564 case e_dw_fbregister_op:
565 if(frame_pointer_address != NULL)
566 add_value(&compose, "address", (long)((char *)frame_pointer_address + location_entry->location.fbreg_op));
569 xbt_dynar_reset(compose);
575 if(xbt_dynar_length(compose) > 0){
576 //XBT_INFO("Variable : %s", current_variable->name);
577 if(strcmp(xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->type, "value") == 0){
578 //XBT_INFO("Variable : %s - value : %lx", current_variable->name, xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->value.res);
579 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));
581 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){
582 //XBT_INFO("Variable : %s - address : NULL", current_variable->name);
583 xbt_strbuff_append(variables, bprintf("%s=NULL\n", current_variable->name));
584 }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)){
585 //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));
586 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)));
588 //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));
589 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)));
593 //XBT_INFO("Variable %s undefined", current_variable->name);
594 xbt_strbuff_append(variables, bprintf("%s=undefined\n", current_variable->name));
601 //XBT_INFO("Variable : %s, no location", current_variable->name);
602 xbt_strbuff_append(variables, bprintf("%s=undefined\n", current_variable->name));
618 static void print_local_variables_values(xbt_dynar_t all_variables){
621 mc_snapshot_stack_t stack;
623 xbt_dynar_foreach(all_variables, cursor, stack){
624 XBT_INFO("%s", stack->local_variables->data);
629 static void snapshot_stack_free(mc_snapshot_stack_t s){
631 xbt_free(s->local_variables->data);
632 xbt_free(s->local_variables);
637 void snapshot_stack_free_voidp(void *s){
638 snapshot_stack_free((mc_snapshot_stack_t) * (void **) s);
641 void *MC_snapshot(void){
643 return simcall_mc_snapshot();