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, *end_plt;
19 char *libsimgrid_path;
21 static mc_mem_region_t MC_region_new(int type, void *start_addr, size_t size);
22 static void MC_region_restore(mc_mem_region_t reg);
23 static void MC_region_destroy(mc_mem_region_t reg);
25 static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type, void *start_addr, size_t size);
27 static void add_value(xbt_dynar_t *list, const char *type, unsigned long int val);
28 static xbt_dynar_t take_snapshot_stacks(void *heap);
29 static void get_local_variables_values(xbt_dynar_t *all_variables, stack_region_t stack, void *heap);
30 static void print_local_variables_values(xbt_dynar_t all_variables);
32 static mc_mem_region_t MC_region_new(int type, void *start_addr, size_t size)
34 mc_mem_region_t new_reg = xbt_new0(s_mc_mem_region_t, 1);
36 new_reg->start_addr = start_addr;
38 new_reg->data = xbt_malloc0(size);
39 memcpy(new_reg->data, start_addr, size);
41 XBT_DEBUG("New region : type : %d, data : %p, size : %zu", type, new_reg->data, size);
46 static void MC_region_restore(mc_mem_region_t reg)
48 /*FIXME: check if start_addr is still mapped, if it is not, then map it
49 before copying the data */
51 memcpy(reg->start_addr, reg->data, reg->size);
56 static void MC_region_destroy(mc_mem_region_t reg)
62 static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type, void *start_addr, size_t size)
64 mc_mem_region_t new_reg = MC_region_new(type, start_addr, size);
65 snapshot->regions = xbt_realloc(snapshot->regions, (snapshot->num_reg + 1) * sizeof(mc_mem_region_t));
66 snapshot->regions[snapshot->num_reg] = new_reg;
71 void MC_take_snapshot(mc_snapshot_t snapshot)
75 memory_map_t maps = get_memory_map();
77 /* Save the std heap and the writable mapped pages of libsimgrid */
78 while (i < maps->mapsize) {
79 reg = maps->regions[i];
80 if ((reg.prot & PROT_WRITE)){
81 if (maps->regions[i].pathname == NULL){
82 if (reg.start_addr == std_heap){ // only save the std heap (and not the raw one)
83 MC_snapshot_add_region(snapshot, 0, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
86 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
87 MC_snapshot_add_region(snapshot, 1, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
94 free_memory_map(maps);
97 void MC_take_snapshot_liveness(mc_snapshot_t snapshot)
101 memory_map_t maps = get_memory_map();
105 /* Save the std heap and the writable mapped pages of libsimgrid */
106 while (i < maps->mapsize && nb_reg < 3) {
107 reg = maps->regions[i];
108 if ((reg.prot & PROT_WRITE)){
109 if (maps->regions[i].pathname == NULL){
110 if (reg.start_addr == std_heap){ // only save the std heap (and not the raw one)
111 MC_snapshot_add_region(snapshot, 0, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
112 heap = snapshot->regions[nb_reg]->data;
116 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
117 MC_snapshot_add_region(snapshot, 1, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
120 if (!memcmp(basename(maps->regions[i].pathname), basename(xbt_binary_name), strlen(basename(xbt_binary_name)))){
121 MC_snapshot_add_region(snapshot, 2, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
126 }else if ((reg.prot & PROT_READ)){
127 if (maps->regions[i].pathname != NULL){
128 if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
129 start_text_libsimgrid = reg.start_addr;
130 libsimgrid_path = strdup(maps->regions[i].pathname);
137 snapshot->stacks = take_snapshot_stacks(heap);
139 free_memory_map(maps);
143 void MC_restore_snapshot(mc_snapshot_t snapshot)
146 for(i=0; i < snapshot->num_reg; i++){
147 MC_region_restore(snapshot->regions[i]);
152 void MC_free_snapshot(mc_snapshot_t snapshot)
155 for(i=0; i < snapshot->num_reg; i++)
156 MC_region_destroy(snapshot->regions[i]);
161 static int data_program_region_compare(void *d1, void *d2, size_t size){
165 for(i=0; i<size; i++){
166 if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
167 XBT_DEBUG("Different byte (offset=%zu) (%p - %p) in data program region", i, (char *)d1 + i, (char *)d2 + i);
172 XBT_DEBUG("Hamming distance between data program regions : %d", distance);
177 static int data_libsimgrid_region_compare(void *d1, void *d2, size_t size){
181 void *addr_pointed1 = NULL, *addr_pointed2 = NULL;
183 for(i=0; i<size; i++){
184 if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
185 pointer_align = (i / sizeof(void*)) * sizeof(void*);
186 addr_pointed1 = *((void **)((char *)d1 + pointer_align));
187 addr_pointed2 = *((void **)((char *)d2 + pointer_align));
188 if((addr_pointed1 > start_plt && addr_pointed1 < end_plt) || (addr_pointed2 > start_plt && addr_pointed2 < end_plt)){
191 XBT_DEBUG("Different byte (offset=%zu) (%p - %p) in data libsimgrid region", i, (char *)d1 + i, (char *)d2 + i);
192 XBT_DEBUG("Addresses pointed : %p - %p\n", addr_pointed1, addr_pointed2);
198 XBT_DEBUG("Hamming distance between data libsimgrid regions : %d", distance); fflush(NULL);
203 static int heap_region_compare(void *d1, void *d2, size_t size);
205 static int heap_region_compare(void *d1, void *d2, size_t size){
210 for(i=0; i<size; i++){
211 if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
212 //XBT_DEBUG("Different byte (offset=%zu) (%p - %p) in heap region", i, (char *)d1 + i, (char *)d2 + i);
217 XBT_DEBUG("Hamming distance between heap regions : %d (total size : %zu)", distance, size);
222 int snapshot_compare(mc_snapshot_t s1, mc_snapshot_t s2){
228 if(s1->num_reg != s2->num_reg){
229 XBT_DEBUG("Different num_reg (s1 = %u, s2 = %u)", s1->num_reg, s2->num_reg);
233 for(i=0 ; i< s1->num_reg ; i++){
235 if(s1->regions[i]->type != s2->regions[i]->type){
236 XBT_INFO("Different type of region");
240 switch(s1->regions[i]->type){
242 /* Compare heapregion */
243 if(s1->regions[i]->size != s2->regions[i]->size){
244 XBT_DEBUG("Different size of heap (s1 = %zu, s2 = %zu)", s1->regions[i]->size, s2->regions[i]->size);
247 if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
248 XBT_DEBUG("Different start addr of heap (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
251 if(mmalloc_compare_heap((xbt_mheap_t)s1->regions[i]->data, (xbt_mheap_t)s2->regions[i]->data)){
252 XBT_DEBUG("Different heap (mmalloc_compare)");
255 /*if(heap_region_compare(s1->regions[i]->data, s2->regions[i]->data, s1->regions[i]->size) != 0){
256 XBT_DEBUG("Different memcmp for heap");
259 /*if((dist = mmalloc_linear_compare_heap((xbt_mheap_t)s1->regions[i]->data, (xbt_mheap_t)s2->regions[i]->data)) > 0){
260 XBT_DEBUG("Different heap (mmalloc_linear_compare) : %d", dist);
265 /* Compare data libsimgrid region */
266 if(s1->regions[i]->size != s2->regions[i]->size){
267 XBT_DEBUG("Different size of libsimgrid (data) (s1 = %zu, s2 = %zu)", s1->regions[i]->size, s2->regions[i]->size);
270 if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
271 XBT_DEBUG("Different start addr of libsimgrid (data) (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
274 if(data_libsimgrid_region_compare(s1->regions[i]->data, s2->regions[i]->data, s1->regions[i]->size) != 0){
275 XBT_DEBUG("Different memcmp for data in libsimgrid");
281 /* Compare data program region */
282 if(s1->regions[i]->size != s2->regions[i]->size){
283 XBT_DEBUG("Different size of data program (s1 = %zu, s2 = %zu)", s1->regions[i]->size, s2->regions[i]->size);
287 if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
288 XBT_DEBUG("Different start addr of data program (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
292 if(data_program_region_compare(s1->regions[i]->data, s2->regions[i]->data, s1->regions[i]->size) != 0){
293 XBT_DEBUG("Different memcmp for data in program");
308 void get_plt_section(){
311 char *line = NULL; /* Temporal storage for each line that is readed */
312 ssize_t read; /* Number of bytes readed */
313 size_t n = 0; /* Amount of bytes to read by getline */
316 int i, plt_not_found = 1;
317 unsigned long int size, offset;
319 char *command = bprintf( "objdump --section-headers %s", libsimgrid_path);
321 fp = popen(command, "r");
324 perror("popen failed");
326 while ((read = getline(&line, &n, fp)) != -1 && plt_not_found == 1) {
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 || strcmp(lfields[0], "libsimgrid.so:") == 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 offset = strtoul(lfields[4], NULL, 16);
350 start_plt = (char *)start_text_libsimgrid + offset;
351 end_plt = (char *)start_plt + size;