-/* Copyright (c) 2008-2012 Da SimGrid Team. All rights reserved. */
+/* Copyright (c) 2008-2013. The SimGrid Team.
+ * All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
* under the terms of the license (GNU LGPL) which comes with this package. */
-#include <libgen.h>
+#define _GNU_SOURCE
+#include <string.h>
+#include <link.h>
#include "mc_private.h"
+#include "xbt/module.h"
+#include "../simix/smx_private.h"
+
+#include <libunwind.h>
+#include <libelf.h>
+
+#include "mc_private.h"
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_checkpoint, mc,
"Logging specific to mc_checkpoint");
-static mc_mem_region_t MC_region_new(int type, void *start_addr, size_t size);
-static void MC_region_restore(mc_mem_region_t reg);
-static void MC_region_destroy(mc_mem_region_t reg);
+char *libsimgrid_path;
+
+static void MC_find_object_address(memory_map_t maps, mc_object_info_t result);
+
+/************************************ Free functions **************************************/
+/*****************************************************************************************/
+
+static void MC_snapshot_stack_free(mc_snapshot_stack_t s){
+ if(s){
+ xbt_dynar_free(&(s->local_variables));
+ xbt_free(s);
+ }
+}
+
+static void MC_snapshot_stack_free_voidp(void *s){
+ MC_snapshot_stack_free((mc_snapshot_stack_t) * (void **) s);
+}
+
+static void local_variable_free(local_variable_t v){
+ xbt_free(v->frame);
+ xbt_free(v->name);
+ xbt_free(v->type);
+ xbt_free(v);
+}
+
+static void local_variable_free_voidp(void *v){
+ local_variable_free((local_variable_t) * (void **) v);
+}
-static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type, void *start_addr, size_t size);
+static void MC_region_destroy(mc_mem_region_t reg)
+{
+ xbt_free(reg->data);
+ xbt_free(reg);
+}
+
+void MC_free_snapshot(mc_snapshot_t snapshot){
+ unsigned int i;
+ for(i=0; i < NB_REGIONS; i++)
+ MC_region_destroy(snapshot->regions[i]);
+
+ xbt_free(snapshot->stack_sizes);
+ xbt_dynar_free(&(snapshot->stacks));
+ xbt_dynar_free(&(snapshot->to_ignore));
+ xbt_free(snapshot);
+}
+
+
+/******************************* Snapshot regions ********************************/
+/*********************************************************************************/
static mc_mem_region_t MC_region_new(int type, void *start_addr, size_t size)
{
mc_mem_region_t new_reg = xbt_new0(s_mc_mem_region_t, 1);
- new_reg->type = type;
new_reg->start_addr = start_addr;
new_reg->size = size;
new_reg->data = xbt_malloc0(size);
- XBT_DEBUG("New reg data %p, start_addr %p, size %zu", new_reg->data, start_addr, size);
memcpy(new_reg->data, start_addr, size);
+
+ XBT_DEBUG("New region : type : %d, data : %p (real addr %p), size : %zu", type, new_reg->data, start_addr, size);
return new_reg;
}
{
/*FIXME: check if start_addr is still mapped, if it is not, then map it
before copying the data */
- if(reg->type == 3){
- memory_map_t maps = get_memory_map();
- MC_UNSET_RAW_MEM;
- unsigned int i=0;
- s_map_region_t r;
- while(i < maps->mapsize){
- r = maps->regions[i];
- if (maps->regions[i].pathname != NULL){
- if (!memcmp(maps->regions[i].pathname, "[stack]", 7)){
- size_t diff = (char*)reg->start_addr - (char*)r.start_addr;
- void *segment = malloc(reg->size + diff);
- XBT_DEBUG("Size of segment : %zu", sizeof(segment));
- memcpy((char *)segment + diff, reg->data, reg->size);
- memcpy(r.start_addr, segment, sizeof(segment));
- XBT_DEBUG("Memcpy region ok");
- break;
- }
- }
- i++;
- }
- }else{
- XBT_DEBUG("Memcpy : dest %p, src %p, size %zu", reg->start_addr, reg->data, reg->size);
- memcpy(reg->start_addr, reg->data, reg->size);
- }
-
+
+ memcpy(reg->start_addr, reg->data, reg->size);
return;
}
-static void MC_region_destroy(mc_mem_region_t reg)
-{
- xbt_free(reg->data);
- xbt_free(reg);
-}
-
static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type, void *start_addr, size_t size)
{
- switch(type){
- case 0 :
- XBT_DEBUG("New region heap (%zu)", size);
- break;
- case 1 :
- XBT_DEBUG("New region libsimgrid (%zu)", size);
- break;
- case 2 :
- XBT_DEBUG("New region program data (%zu)", size);
- break;
- }
mc_mem_region_t new_reg = MC_region_new(type, start_addr, size);
- snapshot->regions = xbt_realloc(snapshot->regions, (snapshot->num_reg + 1) * sizeof(mc_mem_region_t));
- snapshot->regions[snapshot->num_reg] = new_reg;
- snapshot->num_reg++;
+ snapshot->regions[type] = new_reg;
return;
}
-void MC_take_snapshot(mc_snapshot_t snapshot)
-{
+static void MC_get_memory_regions(mc_snapshot_t snapshot){
+
+ 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;
+
+ 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'){
+ 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);
+
+}
+
+/** @brief Finds the range of the different memory segments and binary paths */
+void MC_init_memory_map_info(){
+
unsigned int i = 0;
s_map_region_t reg;
- memory_map_t maps = get_memory_map();
+ memory_map_t maps = MC_get_memory_map();
+
+ maestro_stack_start = NULL;
+ maestro_stack_end = NULL;
+ libsimgrid_path = 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);
- }
- } else {
- if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
- MC_snapshot_add_region(snapshot, 1, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
- }
- }
+ if (maps->regions[i].pathname == NULL) {
+ // Nothing to do
+ }
+ else if ((reg.prot & PROT_WRITE) && !memcmp(maps->regions[i].pathname, "[stack]", 7)){
+ maestro_stack_start = reg.start_addr;
+ maestro_stack_end = reg.end_addr;
+ } else if ((reg.prot & PROT_READ) && (reg.prot & PROT_EXEC) && !memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
+ if(libsimgrid_path == NULL)
+ libsimgrid_path = strdup(maps->regions[i].pathname);
}
i++;
}
- /* FIXME: free the memory map */
+ xbt_assert(maestro_stack_start, "maestro_stack_start");
+ xbt_assert(maestro_stack_end, "maestro_stack_end");
+ xbt_assert(libsimgrid_path, "libsimgrid_path&");
+
+ MC_free_memory_map(maps);
+
}
-void MC_take_snapshot_liveness(mc_snapshot_t snapshot)
-{
+static void MC_post_process_types(mc_object_info_t info) {
+ // Nothing here
+}
+
+/** \brief Finds informations about a given shared object/executable */
+mc_object_info_t MC_find_object_info(memory_map_t maps, char* name) {
+ mc_object_info_t result = MC_new_object_info();
+ result->file_name = xbt_strdup(name);
+ MC_find_object_address(maps, result);
+ MC_dwarf_get_variables(result);
+ MC_post_process_types(result);
+ return result;
+}
+
+/** \brief Fills the position of the .bss and .data sections. */
+static void MC_find_object_address(memory_map_t maps, mc_object_info_t result) {
+
unsigned int i = 0;
s_map_region_t reg;
- memory_map_t maps = get_memory_map();
+ const char* name = basename(result->file_name);
+ while (i < maps->mapsize) {
+ reg = maps->regions[i];
+ if (maps->regions[i].pathname == NULL || strcmp(basename(maps->regions[i].pathname), name)) {
+ // Nothing to do
+ }
+ else if ((reg.prot & PROT_WRITE)){
+ xbt_assert(!result->start_rw,
+ "Multiple read-write segments for %s, not supported",
+ maps->regions[i].pathname);
+ result->start_rw = reg.start_addr;
+ result->end_rw = reg.end_addr;
+ } else if ((reg.prot & PROT_READ) && (reg.prot & PROT_EXEC)){
+ xbt_assert(!result->start_exec,
+ "Multiple executable segments for %s, not supported",
+ maps->regions[i].pathname);
+ result->start_exec = reg.start_addr;
+ result->end_exec = reg.end_addr;
+ }
+ else if((reg.prot & PROT_READ) && !(reg.prot & PROT_EXEC)) {
+ xbt_assert(!result->start_ro,
+ "Multiple read only segments for %s, not supported",
+ maps->regions[i].pathname);
+ result->start_ro = reg.start_addr;
+ result->end_ro = reg.end_addr;
+ }
+ i++;
+ }
- for(i=0; i< snapshot->num_reg; i++){
- MC_region_destroy(snapshot->regions[i]);
+ xbt_assert(result->file_name);
+ xbt_assert(result->start_rw);
+ xbt_assert(result->start_exec);
+}
+
+/************************************* Take Snapshot ************************************/
+/****************************************************************************************/
+
+static void MC_get_hash_global(char *snapshot_hash, void *data1, void *data2){
+
+ /* unsigned int cursor = 0; */
+ /* size_t offset; */
+ /* global_variable_t current_var; */
+ /* void *addr_pointed = NULL; */
+ /* void *res = NULL; */
+
+ /* xbt_strbuff_t clear = xbt_strbuff_new(); */
+
+ /* xbt_dynar_foreach(mc_global_variables, cursor, current_var){ */
+ /* if(current_var->address < start_data_libsimgrid){ /\* binary *\/ */
+ /* offset = (char *)current_var->address - (char *)start_data_binary; */
+ /* addr_pointed = *((void **)((char *)data2 + offset)); */
+ /* if(((addr_pointed >= start_plt_binary && addr_pointed <= end_plt_binary)) || ((addr_pointed >= std_heap && (char *)addr_pointed <= (char *)std_heap + STD_HEAP_SIZE ))) */
+ /* continue; */
+ /* res = xbt_malloc0(current_var->size + 1); */
+ /* memset(res, 0, current_var->size + 1); */
+ /* memcpy(res, (char*)data2 + offset, current_var->size); */
+ /* }else{ /\* libsimgrid *\/ */
+ /* offset = (char *)current_var->address - (char *)start_data_libsimgrid; */
+ /* addr_pointed = *((void **)((char *)data1 + offset)); */
+ /* if((addr_pointed >= start_plt_libsimgrid && addr_pointed <= end_plt_libsimgrid) || (addr_pointed >= std_heap && (char *)addr_pointed <= (char *)std_heap + STD_HEAP_SIZE )) */
+ /* continue; */
+ /* res = xbt_malloc0(current_var->size + 1); */
+ /* memset(res, 0, current_var->size + 1); */
+ /* memcpy(res, (char*)data1 + offset, current_var->size); */
+ /* } */
+ /* if(res != NULL){ */
+ /* xbt_strbuff_append(clear, (const char*)res); */
+ /* xbt_free(res); */
+ /* res = NULL; */
+ /* } */
+ /* } */
+
+ /* xbt_sha(clear->data, snapshot_hash); */
+
+ /* xbt_strbuff_free(clear); */
+
+}
+
+static void MC_get_hash_local(char *snapshot_hash, xbt_dynar_t stacks){
+
+ /* xbt_dynar_t tokens = NULL, s_tokens = NULL; */
+ /* unsigned int cursor1 = 0, cursor2 = 0; */
+ /* mc_snapshot_stack_t current_stack; */
+ /* char *frame_name = NULL; */
+ /* void *addr; */
+
+ /* xbt_strbuff_t clear = xbt_strbuff_new(); */
+
+ /* while(cursor1 < xbt_dynar_length(stacks)){ */
+ /* current_stack = xbt_dynar_get_as(stacks, cursor1, mc_snapshot_stack_t); */
+ /* tokens = xbt_str_split(current_stack->local_variables->data, NULL); */
+ /* cursor2 = 0; */
+ /* while(cursor2 < xbt_dynar_length(tokens)){ */
+ /* s_tokens = xbt_str_split(xbt_dynar_get_as(tokens, cursor2, char *), "="); */
+ /* if(xbt_dynar_length(s_tokens) > 1){ */
+ /* if(strcmp(xbt_dynar_get_as(s_tokens, 0, char *), "frame_name") == 0){ */
+ /* xbt_free(frame_name); */
+ /* frame_name = xbt_strdup(xbt_dynar_get_as(s_tokens, 1, char *)); */
+ /* xbt_strbuff_append(clear, (const char*)xbt_dynar_get_as(tokens, cursor2, char *)); */
+ /* cursor2++; */
+ /* xbt_dynar_free(&s_tokens); */
+ /* continue; */
+ /* } */
+ /* addr = (void *) strtoul(xbt_dynar_get_as(s_tokens, 1, char *), NULL, 16); */
+ /* if(addr > std_heap && (char *)addr <= (char *)std_heap + STD_HEAP_SIZE){ */
+ /* cursor2++; */
+ /* xbt_dynar_free(&s_tokens); */
+ /* continue; */
+ /* } */
+ /* if(is_stack_ignore_variable(frame_name, xbt_dynar_get_as(s_tokens, 0, char *))){ */
+ /* cursor2++; */
+ /* xbt_dynar_free(&s_tokens); */
+ /* continue; */
+ /* } */
+ /* xbt_strbuff_append(clear, (const char *)xbt_dynar_get_as(tokens, cursor2, char *)); */
+ /* } */
+ /* xbt_dynar_free(&s_tokens); */
+ /* cursor2++; */
+ /* } */
+ /* xbt_dynar_free(&tokens); */
+ /* cursor1++; */
+ /* } */
+
+ /* xbt_free(frame_name); */
+
+ /* xbt_sha(clear->data, snapshot_hash); */
+
+ /* xbt_strbuff_free(clear); */
+
+}
+
+
+
+static xbt_dynar_t MC_get_local_variables_values(void *stack_context){
+
+ unw_cursor_t c;
+ int ret;
+
+ char frame_name[256];
+
+ ret = unw_init_local(&c, (unw_context_t *)stack_context);
+ if(ret < 0){
+ XBT_INFO("unw_init_local failed");
+ xbt_abort();
}
- snapshot->num_reg = 0;
+ unw_word_t ip, sp, off;
+ dw_frame_t frame;
- i = 0;
+ unsigned int cursor = 0;
+ dw_variable_t current_variable;
+ int region_type;
+ void *frame_pointer_address = NULL;
+ long true_ip;
+ int stop = 0;
- /* 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);
- }
- } else {
- if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
- MC_snapshot_add_region(snapshot, 1, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
- } else {
- if (!memcmp(basename(maps->regions[i].pathname), basename(prog_name), strlen(basename(prog_name)))){
- MC_snapshot_add_region(snapshot, 2, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
- }
- }
+ xbt_dynar_t variables = xbt_dynar_new(sizeof(local_variable_t), local_variable_free_voidp);
+
+ while(ret >= 0 && !stop){
+
+ unw_get_reg(&c, UNW_REG_IP, &ip);
+ unw_get_reg(&c, UNW_REG_SP, &sp);
+
+ unw_get_proc_name(&c, frame_name, sizeof (frame_name), &off);
+
+ if(!strcmp(frame_name, "smx_ctx_sysv_wrapper")) /* Stop before context switch with maestro */
+ stop = 1;
+
+ if((long)ip > (long) mc_libsimgrid_info->start_exec)
+ frame = xbt_dict_get_or_null(mc_libsimgrid_info->local_variables, frame_name);
+ else
+ frame = xbt_dict_get_or_null(mc_binary_info->local_variables, frame_name);
+
+ if(frame == NULL){
+ ret = unw_step(&c);
+ continue;
+ }
+
+ true_ip = (long)frame->low_pc + (long)off;
+ frame_pointer_address = mc_find_frame_base(true_ip, frame, &c);
+
+ cursor = 0;
+
+ xbt_dynar_foreach(frame->variables, cursor, current_variable){
+
+ if((long)ip > (long)mc_libsimgrid_info->start_exec)
+ region_type = 1;
+ else
+ region_type = 2;
+
+ local_variable_t new_var = xbt_new0(s_local_variable_t, 1);
+ new_var->frame = xbt_strdup(frame_name);
+ new_var->ip = (unsigned long)ip;
+ new_var->name = xbt_strdup(current_variable->name);
+ new_var->type = strdup(current_variable->type_origin);
+ new_var->region= region_type;
+
+ if(current_variable->address.location != NULL){
+ new_var->address = (void*) MC_dwarf_resolve_location(&c, current_variable->address.location, frame_pointer_address);
}
+
+ xbt_dynar_push(variables, &new_var);
+
}
- i++;
+
+ ret = unw_step(&c);
+
}
- /* FIXME: free the memory map */
+ return variables;
+
}
-void MC_restore_snapshot(mc_snapshot_t snapshot)
-{
- unsigned int i;
- for(i=0; i < snapshot->num_reg; i++){
- MC_region_restore(snapshot->regions[i]);
- switch(snapshot->regions[i]->type){
- case 0 :
- XBT_DEBUG("heap restored");
- break;
- case 1:
- XBT_DEBUG("libsimgrid (data) restored");
- break;
- case 2:
- XBT_DEBUG("data program restored");
- break;
+
+static void *MC_get_stack_pointer(void *stack_context, void *heap){
+
+ unw_cursor_t c;
+ int ret;
+ unw_word_t sp;
+
+ ret = unw_init_local(&c, (unw_context_t *)stack_context);
+ if(ret < 0){
+ XBT_INFO("unw_init_local failed");
+ xbt_abort();
+ }
+
+ unw_get_reg(&c, UNW_REG_SP, &sp);
+
+ return ((char *)heap + (size_t)(((char *)((long)sp) - (char*)std_heap)));
+
+}
+
+static xbt_dynar_t MC_take_snapshot_stacks(mc_snapshot_t *snapshot, void *heap){
+
+ xbt_dynar_t res = xbt_dynar_new(sizeof(s_mc_snapshot_stack_t), MC_snapshot_stack_free_voidp);
+
+ unsigned int cursor = 0;
+ stack_region_t current_stack;
+
+ xbt_dynar_foreach(stacks_areas, cursor, current_stack){
+ mc_snapshot_stack_t st = xbt_new(s_mc_snapshot_stack_t, 1);
+ st->local_variables = MC_get_local_variables_values(current_stack->context);
+ st->stack_pointer = MC_get_stack_pointer(current_stack->context, heap);
+ st->real_address = current_stack->address;
+ xbt_dynar_push(res, &st);
+ (*snapshot)->stack_sizes = xbt_realloc((*snapshot)->stack_sizes, (cursor + 1) * sizeof(size_t));
+ (*snapshot)->stack_sizes[cursor] = current_stack->size - ((char *)st->stack_pointer - (char *)((char *)heap + ((char *)current_stack->address - (char *)std_heap)));
+ }
+
+ return res;
+
+}
+
+static xbt_dynar_t MC_take_snapshot_ignore(){
+
+ if(mc_heap_comparison_ignore == NULL)
+ return NULL;
+
+ xbt_dynar_t cpy = xbt_dynar_new(sizeof(mc_heap_ignore_region_t), heap_ignore_region_free_voidp);
+
+ unsigned int cursor = 0;
+ mc_heap_ignore_region_t current_region;
+
+ xbt_dynar_foreach(mc_heap_comparison_ignore, cursor, current_region){
+ mc_heap_ignore_region_t new_region = NULL;
+ new_region = xbt_new0(s_mc_heap_ignore_region_t, 1);
+ new_region->address = current_region->address;
+ new_region->size = current_region->size;
+ new_region->block = current_region->block;
+ new_region->fragment = current_region->fragment;
+ xbt_dynar_push(cpy, &new_region);
+ }
+
+ return cpy;
+
+}
+
+static void MC_dump_checkpoint_ignore(mc_snapshot_t snapshot){
+
+ unsigned int cursor = 0;
+ mc_checkpoint_ignore_region_t region;
+ size_t offset;
+
+ xbt_dynar_foreach(mc_checkpoint_ignore, cursor, region){
+ if(region->addr > snapshot->regions[0]->start_addr && (char *)(region->addr) < (char *)snapshot->regions[0]->start_addr + STD_HEAP_SIZE){
+ offset = (char *)region->addr - (char *)snapshot->regions[0]->start_addr;
+ memset((char *)snapshot->regions[0]->data + offset, 0, region->size);
+ }else if(region->addr > snapshot->regions[2]->start_addr && (char *)(region->addr) < (char*)snapshot->regions[2]->start_addr + snapshot->regions[2]->size){
+ offset = (char *)region->addr - (char *)snapshot->regions[2]->start_addr;
+ memset((char *)snapshot->regions[2]->data + offset, 0, region->size);
+ }else if(region->addr > snapshot->regions[1]->start_addr && (char *)(region->addr) < (char*)snapshot->regions[1]->start_addr + snapshot->regions[1]->size){
+ offset = (char *)region->addr - (char *)snapshot->regions[1]->start_addr;
+ memset((char *)snapshot->regions[1]->data + offset, 0, region->size);
}
+ }
+
+}
+
+mc_snapshot_t MC_take_snapshot(int num_state){
+
+ mc_snapshot_t snapshot = xbt_new0(s_mc_snapshot_t, 1);
+ snapshot->nb_processes = xbt_swag_size(simix_global->process_list);
+ if(MC_USE_SNAPSHOT_HASH) {
+ snapshot->hash = mc_hash_processes_state(num_state);
+ } else {
+ snapshot->hash = 0;
}
+ /* Save the std heap and the writable mapped pages of libsimgrid and binary */
+ MC_get_memory_regions(snapshot);
+
+ snapshot->to_ignore = MC_take_snapshot_ignore();
+
+ if(_sg_mc_visited > 0 || strcmp(_sg_mc_property_file,"")){
+ snapshot->stacks = MC_take_snapshot_stacks(&snapshot, snapshot->regions[0]->data);
+ //MC_get_hash_global(snapshot->hash_global, snapshot->regions[1]->data, snapshot->regions[2]->data);
+ //MC_get_hash_local(snapshot->hash_local, snapshot->stacks);
+ }
+
+ if(num_state > 0)
+ MC_dump_checkpoint_ignore(snapshot);
+
+ return snapshot;
+
}
-void MC_free_snapshot(mc_snapshot_t snapshot)
-{
+void MC_restore_snapshot(mc_snapshot_t snapshot){
unsigned int i;
- for(i=0; i < snapshot->num_reg; i++)
- MC_region_destroy(snapshot->regions[i]);
+ for(i=0; i < NB_REGIONS; i++){
+ MC_region_restore(snapshot->regions[i]);
+ }
- xbt_free(snapshot);
}
+mc_snapshot_t SIMIX_pre_mc_snapshot(smx_simcall_t simcall){
+ return MC_take_snapshot(1);
+}
+void *MC_snapshot(void){
+ return simcall_mc_snapshot();
+}