return;
}
-void MC_init_memory_map_info(){
+static void get_memory_regions(mc_snapshot_t snapshot){
- int raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
+ FILE *fp;
+ char *line = NULL;
+ ssize_t read;
+ size_t n = 0;
+
+ char *lfields[6] = {0}, *tok;
+ void *start_addr, *start_addr1, *end_addr;
+ size_t size;
+ int i;
- MC_SET_RAW_MEM;
+ fp = fopen("/proc/self/maps", "r");
+ xbt_assert(fp,
+ "Cannot open /proc/self/maps to investigate the memory map of the process. Please report this bug.");
+
+ setbuf(fp, NULL);
+
+ while((read = xbt_getline(&line, &n, fp)) != -1){
+
+ /* Wipeout the new line character */
+ line[read - 1] = '\0';
+
+ /* Tokenize the line using spaces as delimiters and store each token */
+ lfields[0] = strtok(line, " ");
+
+ for (i = 1; i < 6 && lfields[i - 1] != NULL; i++) {
+ lfields[i] = strtok(NULL, " ");
+ }
+
+ /* First get the permissions flags, need write permission */
+ if(lfields[1][1] == 'w'){
+
+ /* Get the start address of the map */
+ tok = strtok(lfields[0], "-");
+ start_addr = (void *)strtoul(tok, NULL, 16);
+
+ if(start_addr == std_heap){ /* Std_heap ? */
+ tok = strtok(NULL, "-");
+ end_addr = (void *)strtoul(tok, NULL, 16);
+ MC_snapshot_add_region(snapshot, 0, start_addr, (char*)end_addr - (char*)start_addr);
+ snapshot->heap_bytes_used = mmalloc_get_bytes_used(std_heap);
+ }else{ /* map name == libsimgrid || binary_name ? */
+ if(lfields[5] != NULL){
+ if(!memcmp(basename(lfields[5]), "libsimgrid", 10)){
+ tok = strtok(NULL, "-");
+ end_addr = (void *)strtoul(tok, NULL, 16);
+ size = (char*)end_addr - (char*)start_addr;
+ /* BSS and data segments may be separated according to the OS */
+ if((read = xbt_getline(&line, &n, fp)) != -1){
+ line[read - 1] = '\0';
+ lfields[0] = strtok(line, " ");
+ for (i = 1; i < 6 && lfields[i - 1] != NULL; i++) {
+ lfields[i] = strtok(NULL, " ");
+ }
+ if(lfields[1][1] == 'w' && lfields[5] == NULL){
+ tok = strtok(lfields[0], "-");
+ start_addr1 = (void *)strtoul(tok, NULL, 16);
+ tok = strtok(NULL, "-");
+ size += (char *)(void *)strtoul(tok, NULL, 16) - (char*)start_addr1;
+ }
+ }
+ MC_snapshot_add_region(snapshot, 1, start_addr, size);
+ }else if(!memcmp(basename(lfields[5]), basename(xbt_binary_name), strlen(basename(xbt_binary_name)))){
+ tok = strtok(NULL, "-");
+ end_addr = (void *)strtoul(tok, NULL, 16);
+ size = (char*)end_addr - (char*)start_addr;
+ /* BSS and data segments may be separated according to the OS */
+ if((read = xbt_getline(&line, &n, fp)) != -1){
+ line[read - 1] = '\0';
+ lfields[0] = strtok(line, " ");
+ for (i = 1; i < 6 && lfields[i - 1] != NULL; i++) {
+ lfields[i] = strtok(NULL, " ");
+ }
+ tok = strtok(lfields[0], "-");
+ start_addr1 = (void *)strtoul(tok, NULL, 16);
+ if(lfields[1][1] == 'w' && lfields[5] == NULL){
+ if(start_addr1 == std_heap){ /* Std_heap ? */
+ tok = strtok(NULL, "-");
+ end_addr = (void *)strtoul(tok, NULL, 16);
+ MC_snapshot_add_region(snapshot, 0, start_addr1, (char*)end_addr - (char*)start_addr1);
+ snapshot->heap_bytes_used = mmalloc_get_bytes_used(std_heap);
+ }else if(start_addr1 != raw_heap){
+ tok = strtok(NULL, "-");
+ size += (char *)(void *)strtoul(tok, NULL, 16) - (char *)start_addr1;
+ }
+ }
+ }
+ MC_snapshot_add_region(snapshot, 2, start_addr, size);
+ }else if (!memcmp(lfields[5], "[stack]", 7)){
+ maestro_stack_start = start_addr;
+ tok = strtok(NULL, "-");
+ maestro_stack_end = (void *)strtoul(tok, NULL, 16);
+ }
+ }
+ }
+ }
+
+ }
+
+ free(line);
+ fclose(fp);
+
+}
+
+void MC_init_memory_map_info(){
+
unsigned int i = 0;
s_map_region_t reg;
memory_map_t maps = get_memory_map();
}
i++;
}
-
+
free_memory_map(maps);
- MC_UNSET_RAW_MEM;
-
- if(raw_mem_set)
- MC_SET_RAW_MEM;
-
}
mc_snapshot_t MC_take_snapshot()
{
+
int raw_mem = (mmalloc_get_current_heap() == raw_heap);
MC_SET_RAW_MEM;
mc_snapshot_t snapshot = xbt_new0(s_mc_snapshot_t, 1);
snapshot->nb_processes = xbt_swag_size(simix_global->process_list);
- unsigned int i = 0;
- s_map_region_t reg;
- memory_map_t maps = get_memory_map();
- void *heap = NULL;
- size_t size = 0;
- void *start = NULL;
-
- /* Save the std heap and the writable mapped pages of libsimgrid */
- while (i < maps->mapsize) {
- reg = maps->regions[i];
- if ((reg.prot & PROT_WRITE)){
- if (maps->regions[i].pathname == NULL){
- if (reg.start_addr == std_heap){ // only save the std heap (and not the raw one)
- MC_snapshot_add_region(snapshot, 0, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
- snapshot->heap_bytes_used = mmalloc_get_bytes_used(std_heap);
- heap = snapshot->regions[0]->data;
- }
- i++;
- } else{
- if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
- size = (char*)reg.end_addr - (char*)reg.start_addr;
- start = reg.start_addr;
- i++;
- reg = maps->regions[i];
- if(reg.pathname == NULL && (reg.prot & PROT_WRITE) && i < maps->mapsize){
- size += (char*)reg.end_addr - (char*)reg.start_addr;
- reg = maps->regions[i];
- i++;
- }
- MC_snapshot_add_region(snapshot, 1, start, size);
- }else if(!memcmp(maps->regions[i].pathname, "[stack]", 7)){
- maestro_stack_start = reg.start_addr;
- maestro_stack_end = reg.end_addr;
- i++;
- } else if (!memcmp(basename(maps->regions[i].pathname), basename(xbt_binary_name), strlen(basename(xbt_binary_name)))){
- size = (char*)reg.end_addr - (char*)reg.start_addr;
- start = reg.start_addr;
- i++;
- reg = maps->regions[i];
- if(reg.pathname == NULL && (reg.prot & PROT_WRITE) && reg.start_addr != std_heap && reg.start_addr != raw_heap && i < maps->mapsize){
- size += (char*)reg.end_addr - (char*)reg.start_addr;
- reg = maps->regions[i];
- i++;
- }
- MC_snapshot_add_region(snapshot, 2, start, size);
- }else{
- i++;
- }
- }
- }else{
- i++;
- }
- }
+ /* Save the std heap and the writable mapped pages of libsimgrid and binary */
+ get_memory_regions(snapshot);
snapshot->to_ignore = take_snapshot_ignore();
if(_sg_mc_visited > 0 || strcmp(_sg_mc_property_file,"")){
- snapshot->stacks = take_snapshot_stacks(&snapshot, heap);
+ snapshot->stacks = take_snapshot_stacks(&snapshot, snapshot->regions[0]->data);
get_hash_global(snapshot->hash_global, snapshot->regions[1]->data, snapshot->regions[2]->data);
get_hash_local(snapshot->hash_local, snapshot->stacks);
}
- free_memory_map(maps);
-
MC_UNSET_RAW_MEM;
if(raw_mem)
