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(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, size : %zu", type, new_reg->data, 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;
81 void MC_init_memory_map_info(){
83 int raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
89 memory_map_t maps = get_memory_map();
91 while (i < maps->mapsize) {
92 reg = maps->regions[i];
93 if ((reg.prot & PROT_WRITE)){
94 if (maps->regions[i].pathname == NULL){
95 if(reg.start_addr == raw_heap){
96 end_raw_heap = reg.end_addr;
99 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
100 start_data_libsimgrid = reg.start_addr;
102 reg = maps->regions[i];
103 if(reg.pathname == NULL && (reg.prot & PROT_WRITE) && i < maps->mapsize)
104 start_bss_libsimgrid = reg.start_addr;
105 }else if (!memcmp(basename(maps->regions[i].pathname), basename(xbt_binary_name), strlen(basename(xbt_binary_name)))){
106 start_data_binary = reg.start_addr;
108 reg = maps->regions[i];
109 if(reg.pathname == NULL && (reg.prot & PROT_WRITE) && reg.start_addr != std_heap && reg.start_addr != raw_heap && i < maps->mapsize){
110 start_bss_binary = reg.start_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);
121 if (!memcmp(basename(maps->regions[i].pathname), basename(xbt_binary_name), strlen(basename(xbt_binary_name)))){
122 start_text_binary = reg.start_addr;
130 free_memory_map(maps);
139 mc_snapshot_t SIMIX_pre_mc_snapshot(smx_simcall_t simcall){
140 return MC_take_snapshot();
143 mc_snapshot_t MC_take_snapshot()
146 int raw_mem = (mmalloc_get_current_heap() == raw_heap);
150 mc_snapshot_t snapshot = xbt_new0(s_mc_snapshot_t, 1);
154 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 heap = snapshot->regions[nb_reg]->data;
167 }else if(reg.start_addr == raw_heap){
168 end_raw_heap = reg.end_addr;
172 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
173 MC_snapshot_add_region(snapshot, 1, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
176 reg = maps->regions[i];
177 if(reg.pathname == NULL && (reg.prot & PROT_WRITE) && i < maps->mapsize){
178 MC_snapshot_add_region(snapshot, 1, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
179 reg = maps->regions[i];
184 if (!memcmp(basename(maps->regions[i].pathname), basename(xbt_binary_name), strlen(basename(xbt_binary_name)))){
185 MC_snapshot_add_region(snapshot, 2, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
188 reg = maps->regions[i];
189 if(reg.pathname == NULL && (reg.prot & PROT_WRITE) && reg.start_addr != std_heap && reg.start_addr != raw_heap && i < maps->mapsize){
190 MC_snapshot_add_region(snapshot, 2, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
191 reg = maps->regions[i];
204 if(_surf_mc_visited > 0 || strcmp(_surf_mc_property_file,""))
205 snapshot->stacks = take_snapshot_stacks(heap);
207 free_memory_map(maps);
218 void MC_restore_snapshot(mc_snapshot_t snapshot)
221 for(i=0; i < snapshot->num_reg; i++){
222 MC_region_restore(snapshot->regions[i]);
227 void MC_free_snapshot(mc_snapshot_t snapshot)
230 for(i=0; i < snapshot->num_reg; i++)
231 MC_region_destroy(snapshot->regions[i]);
233 xbt_dynar_free(&(snapshot->stacks));
238 void get_libsimgrid_plt_section(){
241 char *line = NULL; /* Temporal storage for each line that is readed */
242 ssize_t read; /* Number of bytes readed */
243 size_t n = 0; /* Amount of bytes to read by getline */
246 int i, plt_found = 0;
247 unsigned long int size, offset;
249 if(libsimgrid_path == NULL)
250 libsimgrid_path = get_libsimgrid_path();
252 char *command = bprintf("objdump --section-headers %s", libsimgrid_path);
254 fp = popen(command, "r");
257 perror("popen failed");
261 while ((read = getline(&line, &n, fp)) != -1 && plt_found != 2) {
266 /* Wipeout the new line character */
267 line[read - 1] = '\0';
269 lfields[0] = strtok(line, " ");
271 if(lfields[0] == NULL)
274 if(strcmp(lfields[0], "Sections:") == 0 || strcmp(lfields[0], "Idx") == 0 || strncmp(lfields[0], libsimgrid_path, strlen(libsimgrid_path)) == 0)
277 for (i = 1; i < 7 && lfields[i - 1] != NULL; i++) {
278 lfields[i] = strtok(NULL, " ");
282 if(strcmp(lfields[1], ".plt") == 0){
283 size = strtoul(lfields[2], NULL, 16);
284 offset = strtoul(lfields[5], NULL, 16);
285 start_plt_libsimgrid = (char *)start_text_libsimgrid + offset;
286 end_plt_libsimgrid = (char *)start_plt_libsimgrid + size;
288 }else if(strcmp(lfields[1], ".got.plt") == 0){
289 size = strtoul(lfields[2], NULL, 16);
290 offset = strtoul(lfields[5], NULL, 16);
291 start_got_plt_libsimgrid = (char *)start_text_libsimgrid + offset;
292 end_got_plt_libsimgrid = (char *)start_got_plt_libsimgrid + size;
306 void get_binary_plt_section(){
309 char *line = NULL; /* Temporal storage for each line that is readed */
310 ssize_t read; /* Number of bytes readed */
311 size_t n = 0; /* Amount of bytes to read by getline */
314 int i, plt_found = 0;
315 unsigned long int size;
317 char *command = bprintf( "objdump --section-headers %s", xbt_binary_name);
319 fp = popen(command, "r");
322 perror("popen failed");
326 while ((read = getline(&line, &n, fp)) != -1 && plt_found != 2) {
331 /* Wipeout the new line character */
332 line[read - 1] = '\0';
334 lfields[0] = strtok(line, " ");
336 if(lfields[0] == NULL)
339 if(strcmp(lfields[0], "Sections:") == 0 || strcmp(lfields[0], "Idx") == 0 || strncmp(lfields[0], basename(xbt_binary_name), strlen(xbt_binary_name)) == 0)
342 for (i = 1; i < 7 && lfields[i - 1] != NULL; i++) {
343 lfields[i] = strtok(NULL, " ");
347 if(strcmp(lfields[1], ".plt") == 0){
348 size = strtoul(lfields[2], NULL, 16);
349 start_plt_binary = (void *)strtoul(lfields[3], NULL, 16);
350 end_plt_binary = (char *)start_plt_binary + size;
352 }else if(strcmp(lfields[1], ".got.plt") == 0){
353 size = strtoul(lfields[2], NULL, 16);
354 start_got_plt_binary = (char *)strtoul(lfields[3], NULL, 16);
355 end_got_plt_binary = (char *)start_got_plt_binary + size;
369 static void add_value(xbt_dynar_t *list, const char *type, unsigned long int val){
370 variable_value_t value = xbt_new0(s_variable_value_t, 1);
371 value->type = strdup(type);
372 if(strcmp(type, "value") == 0){
373 value->value.res = val;
375 value->value.address = (void *)val;
377 xbt_dynar_push(*list, &value);
380 static xbt_dynar_t take_snapshot_stacks(void *heap){
382 xbt_dynar_t res = xbt_dynar_new(sizeof(s_mc_snapshot_stack_t), NULL);
384 unsigned int cursor1 = 0;
385 stack_region_t current_stack;
387 xbt_dynar_foreach(stacks_areas, cursor1, current_stack){
388 mc_snapshot_stack_t st = xbt_new(s_mc_snapshot_stack_t, 1);
389 st->local_variables = get_local_variables_values(current_stack->context, heap);
390 st->stack_pointer = get_stack_pointer(current_stack->context, heap);
391 xbt_dynar_push(res, &st);
398 static void *get_stack_pointer(void *stack_context, void *heap){
404 ret = unw_init_local(&c, (unw_context_t *)stack_context);
406 XBT_INFO("unw_init_local failed");
410 unw_get_reg(&c, UNW_REG_SP, &sp);
412 return ((char *)heap + (size_t)(((char *)((long)sp) - (char*)std_heap)));
416 static xbt_strbuff_t get_local_variables_values(void *stack_context, void *heap){
421 char frame_name[256];
423 ret = unw_init_local(&c, (unw_context_t *)stack_context);
425 XBT_INFO("unw_init_local failed");
429 unw_word_t ip, sp, off;
432 xbt_dynar_t compose = xbt_dynar_new(sizeof(variable_value_t), NULL);
434 xbt_strbuff_t variables = xbt_strbuff_new();
435 xbt_dict_cursor_t dict_cursor;
437 dw_local_variable_t current_variable;
438 unsigned int cursor = 0, cursor2 = 0;
439 dw_location_entry_t entry = NULL;
440 dw_location_t location_entry = NULL;
443 void *frame_pointer_address = NULL;
448 unw_get_reg(&c, UNW_REG_IP, &ip);
449 unw_get_reg(&c, UNW_REG_SP, &sp);
451 unw_get_proc_name (&c, frame_name, sizeof (frame_name), &off);
453 xbt_strbuff_append(variables, bprintf("ip=%s\n", frame_name));
455 frame = xbt_dict_get_or_null(mc_local_variables, frame_name);
462 true_ip = (long)frame->low_pc + (long)off;
464 /* Get frame pointer */
465 switch(frame->frame_base->type){
467 while((cursor < xbt_dynar_length(frame->frame_base->location.loclist)) && frame_found == 0){
468 entry = xbt_dynar_get_as(frame->frame_base->location.loclist, cursor, dw_location_entry_t);
469 if((true_ip >= entry->lowpc) && (true_ip < entry->highpc)){
471 switch(entry->location->type){
473 xbt_dynar_reset(compose);
475 while(cursor2 < xbt_dynar_length(entry->location->location.compose)){
476 location_entry = xbt_dynar_get_as(entry->location->location.compose, cursor2, dw_location_t);
477 switch(location_entry->type){
479 unw_get_reg(&c, location_entry->location.reg, &res);
480 add_value(&compose, "address", (long)res);
482 case e_dw_bregister_op:
483 unw_get_reg(&c, location_entry->location.breg_op.reg, &res);
484 add_value(&compose, "address", (long)res + location_entry->location.breg_op.offset);
487 xbt_dynar_reset(compose);
493 if(xbt_dynar_length(compose) > 0){
494 frame_pointer_address = xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->value.address ;
498 frame_pointer_address = NULL;
506 frame_pointer_address = NULL;
513 xbt_dict_foreach(frame->variables, dict_cursor, variable_name, current_variable){
514 if(current_variable->location != NULL){
515 switch(current_variable->location->type){
517 xbt_dynar_reset(compose);
519 while(cursor < xbt_dynar_length(current_variable->location->location.compose)){
520 location_entry = xbt_dynar_get_as(current_variable->location->location.compose, cursor, dw_location_t);
521 switch(location_entry->type){
523 unw_get_reg(&c, location_entry->location.reg, &res);
524 add_value(&compose, "value", (long)res);
526 case e_dw_bregister_op:
527 unw_get_reg(&c, location_entry->location.breg_op.reg, &res);
528 add_value(&compose, "address", (long)res + location_entry->location.breg_op.offset);
530 case e_dw_fbregister_op:
531 if(frame_pointer_address != NULL)
532 add_value(&compose, "address", (long)((char *)frame_pointer_address + location_entry->location.fbreg_op));
535 xbt_dynar_reset(compose);
541 if(xbt_dynar_length(compose) > 0){
542 if(strcmp(xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->type, "value") == 0){
543 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));
545 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){
546 xbt_strbuff_append(variables, bprintf("%s=NULL\n", current_variable->name));
547 }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)){
548 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)));
550 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)));
554 xbt_strbuff_append(variables, bprintf("%s=undefined\n", current_variable->name));
561 xbt_strbuff_append(variables, bprintf("%s=undefined\n", current_variable->name));
573 static void print_local_variables_values(xbt_dynar_t all_variables){
576 mc_snapshot_stack_t stack;
578 xbt_dynar_foreach(all_variables, cursor, stack){
579 XBT_INFO("%s", stack->local_variables->data);
584 static void snapshot_stack_free(mc_snapshot_stack_t s){
586 xbt_free(s->local_variables->data);
587 xbt_free(s->local_variables);
592 void snapshot_stack_free_voidp(void *s){
593 snapshot_stack_free((mc_snapshot_stack_t) * (void **) s);
596 void *MC_snapshot(void){
598 return simcall_mc_snapshot();