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 (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;
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 (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
96 start_data_libsimgrid = reg.start_addr;
98 reg = maps->regions[i];
99 if(reg.pathname == NULL && (reg.prot & PROT_WRITE) && i < maps->mapsize)
100 start_bss_libsimgrid = reg.start_addr;
101 }else if (!memcmp(basename(maps->regions[i].pathname), basename(xbt_binary_name), strlen(basename(xbt_binary_name)))){
102 start_data_binary = reg.start_addr;
104 reg = maps->regions[i];
105 if(reg.pathname == NULL && (reg.prot & PROT_WRITE) && reg.start_addr != std_heap && reg.start_addr != raw_heap && i < maps->mapsize){
106 start_bss_binary = reg.start_addr;
109 }else if(!memcmp(maps->regions[i].pathname, "[heap]", 6)){
110 end_raw_heap = reg.end_addr;
114 }else if ((reg.prot & PROT_READ) && (reg.prot & PROT_EXEC)){
115 if (maps->regions[i].pathname != NULL){
116 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
117 start_text_libsimgrid = reg.start_addr;
118 libsimgrid_path = strdup(maps->regions[i].pathname);
119 }else if (!memcmp(basename(maps->regions[i].pathname), basename(xbt_binary_name), strlen(basename(xbt_binary_name)))){
120 start_text_binary = reg.start_addr;
127 free_memory_map(maps);
136 mc_snapshot_t SIMIX_pre_mc_snapshot(smx_simcall_t simcall){
137 return MC_take_snapshot();
140 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);
151 memory_map_t maps = get_memory_map();
157 /* Save the std heap and the writable mapped pages of libsimgrid */
158 while (i < maps->mapsize) {
159 reg = maps->regions[i];
160 if ((reg.prot & PROT_WRITE)){
161 if (maps->regions[i].pathname == NULL){
162 if (reg.start_addr == std_heap){ // only save the std heap (and not the raw one)
163 MC_snapshot_add_region(snapshot, 0, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
164 heap = snapshot->regions[nb_reg]->data;
169 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
170 size = (char*)reg.end_addr - (char*)reg.start_addr;
171 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, "[heap]", 6)){
182 end_raw_heap = reg.end_addr;
184 } else if (!memcmp(basename(maps->regions[i].pathname), basename(xbt_binary_name), strlen(basename(xbt_binary_name)))){
185 size = (char*)reg.end_addr - (char*)reg.start_addr;
186 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 if(_sg_mc_visited > 0 || strcmp(_sg_mc_property_file,""))
206 snapshot->stacks = take_snapshot_stacks(heap);
208 free_memory_map(maps);
219 void MC_restore_snapshot(mc_snapshot_t snapshot)
222 for(i=0; i < snapshot->num_reg; i++){
223 MC_region_restore(snapshot->regions[i]);
228 void MC_free_snapshot(mc_snapshot_t snapshot)
231 for(i=0; i < snapshot->num_reg; i++)
232 MC_region_destroy(snapshot->regions[i]);
234 xbt_dynar_free(&(snapshot->stacks));
239 void get_libsimgrid_plt_section(){
242 char *line = NULL; /* Temporal storage for each line that is readed */
243 ssize_t read; /* Number of bytes readed */
244 size_t n = 0; /* Amount of bytes to read by getline */
247 int i, plt_found = 0;
248 unsigned long int size, offset;
250 char *command = bprintf("objdump --section-headers %s", libsimgrid_path);
252 fp = popen(command, "r");
255 perror("popen failed");
259 while ((read = getline(&line, &n, fp)) != -1 && plt_found != 2) {
264 /* Wipeout the new line character */
265 line[read - 1] = '\0';
267 lfields[0] = strtok(line, " ");
269 if(lfields[0] == NULL)
272 if(strcmp(lfields[0], "Sections:") == 0 || strcmp(lfields[0], "Idx") == 0 || strncmp(lfields[0], libsimgrid_path, strlen(libsimgrid_path)) == 0)
275 for (i = 1; i < 7 && lfields[i - 1] != NULL; i++) {
276 lfields[i] = strtok(NULL, " ");
280 if(strcmp(lfields[1], ".plt") == 0){
281 size = strtoul(lfields[2], NULL, 16);
282 offset = strtoul(lfields[5], NULL, 16);
283 start_plt_libsimgrid = (char *)start_text_libsimgrid + offset;
284 end_plt_libsimgrid = (char *)start_plt_libsimgrid + size;
286 }else if(strcmp(lfields[1], ".got.plt") == 0){
287 size = strtoul(lfields[2], NULL, 16);
288 offset = strtoul(lfields[5], NULL, 16);
289 start_got_plt_libsimgrid = (char *)start_text_libsimgrid + offset;
290 end_got_plt_libsimgrid = (char *)start_got_plt_libsimgrid + size;
304 void get_binary_plt_section(){
307 char *line = NULL; /* Temporal storage for each line that is readed */
308 ssize_t read; /* Number of bytes readed */
309 size_t n = 0; /* Amount of bytes to read by getline */
312 int i, plt_found = 0;
313 unsigned long int size;
315 char *command = bprintf( "objdump --section-headers %s", xbt_binary_name);
317 fp = popen(command, "r");
320 perror("popen failed");
324 while ((read = getline(&line, &n, fp)) != -1 && plt_found != 2) {
329 /* Wipeout the new line character */
330 line[read - 1] = '\0';
332 lfields[0] = strtok(line, " ");
334 if(lfields[0] == NULL)
337 if(strcmp(lfields[0], "Sections:") == 0 || strcmp(lfields[0], "Idx") == 0 || strncmp(lfields[0], basename(xbt_binary_name), strlen(xbt_binary_name)) == 0)
340 for (i = 1; i < 7 && lfields[i - 1] != NULL; i++) {
341 lfields[i] = strtok(NULL, " ");
345 if(strcmp(lfields[1], ".plt") == 0){
346 size = strtoul(lfields[2], NULL, 16);
347 start_plt_binary = (void *)strtoul(lfields[3], NULL, 16);
348 end_plt_binary = (char *)start_plt_binary + size;
350 }else if(strcmp(lfields[1], ".got.plt") == 0){
351 size = strtoul(lfields[2], NULL, 16);
352 start_got_plt_binary = (char *)strtoul(lfields[3], NULL, 16);
353 end_got_plt_binary = (char *)start_got_plt_binary + size;
367 static void add_value(xbt_dynar_t *list, const char *type, unsigned long int val){
368 variable_value_t value = xbt_new0(s_variable_value_t, 1);
369 value->type = strdup(type);
370 if(strcmp(type, "value") == 0){
371 value->value.res = val;
373 value->value.address = (void *)val;
375 xbt_dynar_push(*list, &value);
378 static xbt_dynar_t take_snapshot_stacks(void *heap){
380 xbt_dynar_t res = xbt_dynar_new(sizeof(s_mc_snapshot_stack_t), NULL);
382 unsigned int cursor1 = 0;
383 stack_region_t current_stack;
385 xbt_dynar_foreach(stacks_areas, cursor1, current_stack){
386 mc_snapshot_stack_t st = xbt_new(s_mc_snapshot_stack_t, 1);
387 st->local_variables = get_local_variables_values(current_stack->context, heap);
388 st->stack_pointer = get_stack_pointer(current_stack->context, heap);
389 xbt_dynar_push(res, &st);
396 static void *get_stack_pointer(void *stack_context, void *heap){
402 ret = unw_init_local(&c, (unw_context_t *)stack_context);
404 XBT_INFO("unw_init_local failed");
408 unw_get_reg(&c, UNW_REG_SP, &sp);
410 return ((char *)heap + (size_t)(((char *)((long)sp) - (char*)std_heap)));
414 static xbt_strbuff_t get_local_variables_values(void *stack_context, void *heap){
419 char frame_name[256];
421 ret = unw_init_local(&c, (unw_context_t *)stack_context);
423 XBT_INFO("unw_init_local failed");
427 unw_word_t ip, sp, off;
430 xbt_dynar_t compose = xbt_dynar_new(sizeof(variable_value_t), NULL);
432 xbt_strbuff_t variables = xbt_strbuff_new();
433 xbt_dict_cursor_t dict_cursor;
435 dw_local_variable_t current_variable;
436 unsigned int cursor = 0, cursor2 = 0;
437 dw_location_entry_t entry = NULL;
438 dw_location_t location_entry = NULL;
441 void *frame_pointer_address = NULL;
446 unw_get_reg(&c, UNW_REG_IP, &ip);
447 unw_get_reg(&c, UNW_REG_SP, &sp);
449 unw_get_proc_name(&c, frame_name, sizeof (frame_name), &off);
451 frame = xbt_dict_get_or_null(mc_local_variables, frame_name);
456 xbt_strbuff_append(variables, bprintf("ip=%s\n", frame_name));
458 true_ip = (long)frame->low_pc + (long)off;
460 /* Get frame pointer */
461 switch(frame->frame_base->type){
463 while((cursor < xbt_dynar_length(frame->frame_base->location.loclist)) && frame_found == 0){
464 entry = xbt_dynar_get_as(frame->frame_base->location.loclist, cursor, dw_location_entry_t);
465 if((true_ip >= entry->lowpc) && (true_ip < entry->highpc)){
467 switch(entry->location->type){
469 xbt_dynar_reset(compose);
471 while(cursor2 < xbt_dynar_length(entry->location->location.compose)){
472 location_entry = xbt_dynar_get_as(entry->location->location.compose, cursor2, dw_location_t);
473 switch(location_entry->type){
475 unw_get_reg(&c, location_entry->location.reg, &res);
476 add_value(&compose, "address", (long)res);
478 case e_dw_bregister_op:
479 unw_get_reg(&c, location_entry->location.breg_op.reg, &res);
480 add_value(&compose, "address", (long)res + location_entry->location.breg_op.offset);
483 xbt_dynar_reset(compose);
489 if(xbt_dynar_length(compose) > 0){
490 frame_pointer_address = xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->value.address ;
494 frame_pointer_address = NULL;
502 frame_pointer_address = NULL;
509 xbt_dict_foreach(frame->variables, dict_cursor, variable_name, current_variable){
510 if(current_variable->location != NULL){
511 switch(current_variable->location->type){
513 xbt_dynar_reset(compose);
515 while(cursor < xbt_dynar_length(current_variable->location->location.compose)){
516 location_entry = xbt_dynar_get_as(current_variable->location->location.compose, cursor, dw_location_t);
517 switch(location_entry->type){
519 unw_get_reg(&c, location_entry->location.reg, &res);
520 add_value(&compose, "value", (long)res);
522 case e_dw_bregister_op:
523 unw_get_reg(&c, location_entry->location.breg_op.reg, &res);
524 add_value(&compose, "address", (long)res + location_entry->location.breg_op.offset);
526 case e_dw_fbregister_op:
527 if(frame_pointer_address != NULL)
528 add_value(&compose, "address", (long)((char *)frame_pointer_address + location_entry->location.fbreg_op));
531 xbt_dynar_reset(compose);
537 if(xbt_dynar_length(compose) > 0){
538 if(strcmp(xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->type, "value") == 0){
539 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));
541 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){
542 xbt_strbuff_append(variables, bprintf("%s=NULL\n", current_variable->name));
543 }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)){
544 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)));
546 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)));
550 xbt_strbuff_append(variables, bprintf("%s=undefined\n", current_variable->name));
557 xbt_strbuff_append(variables, bprintf("%s=undefined\n", current_variable->name));
569 static void print_local_variables_values(xbt_dynar_t all_variables){
572 mc_snapshot_stack_t stack;
574 xbt_dynar_foreach(all_variables, cursor, stack){
575 XBT_INFO("%s", stack->local_variables->data);
580 static void snapshot_stack_free(mc_snapshot_stack_t s){
582 xbt_free(s->local_variables->data);
583 xbt_free(s->local_variables);
588 void snapshot_stack_free_voidp(void *s){
589 snapshot_stack_free((mc_snapshot_stack_t) * (void **) s);
592 void *MC_snapshot(void){
594 return simcall_mc_snapshot();