-/* Copyright (c) 2008-2012 Da SimGrid Team. All rights reserved. */
+/* Copyright (c) 2008-2014. 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
+#define UNW_LOCAL_ONLY
+
+#include <string.h>
+#include <link.h>
#include "mc_private.h"
#include "xbt/module.h"
+#include <xbt/mmalloc.h>
+#include "../smpi/private.h"
+
+#include "xbt/mmalloc/mmprivate.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;
+
+/************************************ Free functions **************************************/
+/*****************************************************************************************/
+
+static void MC_snapshot_stack_free(mc_snapshot_stack_t s){
+ if(s){
+ xbt_dynar_free(&(s->local_variables));
+ xbt_dynar_free(&(s->stack_frames));
+ 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->name);
+ xbt_free(v);
+}
+
+static void local_variable_free_voidp(void *v){
+ local_variable_free((local_variable_t) * (void **) v);
+}
+
+static void MC_region_destroy(mc_mem_region_t reg)
+{
+ //munmap(reg->data, reg->size);
+ 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));
+
+ if(snapshot->privatization_regions){
+ size_t n = snapshot->nb_processes;
+ for(i=0; i!=n; ++i) {
+ MC_region_destroy(snapshot->privatization_regions[i]);
+ }
+ xbt_free(snapshot->privatization_regions);
+ }
+
+ xbt_free(snapshot);
+}
+
-static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type, void *start_addr, size_t size);
+/******************************* 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;
+ mc_mem_region_t new_reg = xbt_new(s_mc_mem_region_t, 1);
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);
+ //new_reg->data = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
+ //if(new_reg->data==MAP_FAILED)
+ //xbt_die("Could not mmap new memory for snapshot.");
+ new_reg->data = xbt_malloc(size);
memcpy(new_reg->data, start_addr, size);
+ //madvise(new_reg->data, size, MADV_MERGEABLE);
+
+ 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){
+ size_t i;
+
+ void* start_heap = ((xbt_mheap_t)std_heap)->base;
+ void* end_heap = ((xbt_mheap_t)std_heap)->breakval;
+ MC_snapshot_add_region(snapshot, 0, start_heap, (char*) end_heap - (char*) start_heap);
+ snapshot->heap_bytes_used = mmalloc_get_bytes_used(std_heap);
+
+ MC_snapshot_add_region(snapshot, 1, mc_libsimgrid_info->start_rw, mc_libsimgrid_info->end_rw - mc_libsimgrid_info->start_rw);
+ if(!smpi_privatize_global_variables) {
+ MC_snapshot_add_region(snapshot, 2, mc_binary_info->start_rw, mc_binary_info->end_rw - mc_binary_info->start_rw);
+ snapshot->privatization_regions = NULL;
+ snapshot->privatization_index = -1;
+ } else {
+ snapshot->privatization_regions = xbt_new(mc_mem_region_t, SIMIX_process_count());
+ for (i=0; i< SIMIX_process_count(); i++){
+ snapshot->privatization_regions[i] = MC_region_new(-1, mappings[i], size_data_exe);
+ }
+ snapshot->privatization_index = loaded_page;
+ }
+}
+
+/** @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)
-{
- unsigned int i = 0;
- s_map_region_t reg;
- memory_map_t maps = get_memory_map();
+/** \brief Fill/lookup the "subtype" field.
+ */
+static void MC_resolve_subtype(mc_object_info_t info, dw_type_t type) {
- for(i=0; i< snapshot->num_reg; i++){
- MC_region_destroy(snapshot->regions[i]);
+ if(type->dw_type_id==NULL)
+ return;
+ type->subtype = xbt_dict_get_or_null(info->types, type->dw_type_id);
+ if(type->subtype==NULL)
+ return;
+ if(type->subtype->byte_size != 0)
+ return;
+ if(type->subtype->name==NULL)
+ return;
+ // Try to find a more complete description of the type:
+ // We need to fix in order to support C++.
+
+ dw_type_t subtype = xbt_dict_get_or_null(info->full_types_by_name, type->subtype->name);
+ if(subtype!=NULL) {
+ type->subtype = subtype;
}
- snapshot->num_reg = 0;
+}
+
+void MC_post_process_types(mc_object_info_t info) {
+ xbt_dict_cursor_t cursor = NULL;
+ char *origin;
+ dw_type_t type;
- i = 0;
+ // Lookup "subtype" field:
+ xbt_dict_foreach(info->types, cursor, origin, type){
+ MC_resolve_subtype(info, type);
- /* Save the std heap and the writable mapped pages of libsimgrid */
+ dw_type_t member;
+ unsigned int i = 0;
+ if(type->members!=NULL) xbt_dynar_foreach(type->members, i, member) {
+ MC_resolve_subtype(info, member);
+ }
+ }
+}
+
+/** \brief Fills the position of the segments (executable, read-only, read/write).
+ *
+ * TODO, use dl_iterate_phdr to be more robust
+ * */
+void MC_find_object_address(memory_map_t maps, mc_object_info_t result) {
+
+ unsigned int i = 0;
+ s_map_region_t reg;
+ const char* name = basename(result->file_name);
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(xbt_binary_name), strlen(basename(xbt_binary_name)))){
- MC_snapshot_add_region(snapshot, 2, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
- }
- }
- }
+ 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;
+ // .bss is usually after the .data:
+ s_map_region_t* next = &(maps->regions[i+1]);
+ if(next->pathname == NULL && (next->prot & PROT_WRITE) && next->start_addr == reg.end_addr) {
+ result->end_rw = maps->regions[i+1].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++;
}
- /* FIXME: free the memory map */
+ xbt_assert(result->file_name);
+ xbt_assert(result->start_rw);
+ xbt_assert(result->start_exec);
}
-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");
+/************************************* Take Snapshot ************************************/
+/****************************************************************************************/
+
+/** \brief Checks whether the variable is in scope for a given IP.
+ *
+ * A variable may be defined only from a given value of IP.
+ *
+ * \param var Variable description
+ * \param frame Scope description
+ * \param ip Instruction pointer
+ * \return true if the variable is valid
+ * */
+static bool mc_valid_variable(dw_variable_t var, dw_frame_t scope, const void* ip) {
+ // The variable is not yet valid:
+ if((const void*)((const char*) scope->low_pc + var->start_scope) > ip)
+ return false;
+ else
+ return true;
+}
+
+static void mc_fill_local_variables_values(mc_stack_frame_t stack_frame, dw_frame_t scope, xbt_dynar_t result) {
+ void* ip = (void*) stack_frame->ip;
+ if(ip < scope->low_pc || ip>= scope->high_pc)
+ return;
+
+ unsigned cursor = 0;
+ dw_variable_t current_variable;
+ xbt_dynar_foreach(scope->variables, cursor, current_variable){
+
+ if(!mc_valid_variable(current_variable, scope, (void*) stack_frame->ip))
+ continue;
+
+ int region_type;
+ if((long)stack_frame->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->subprogram = stack_frame->frame;
+ new_var->ip = stack_frame->ip;
+ new_var->name = xbt_strdup(current_variable->name);
+ new_var->type = current_variable->type;
+ new_var->region= region_type;
+
+ if(current_variable->address!=NULL) {
+ new_var->address = current_variable->address;
+ } else
+ if(current_variable->locations.size != 0){
+ new_var->address = (void*) mc_dwarf_resolve_locations(¤t_variable->locations,
+ current_variable->object_info,
+ &(stack_frame->unw_cursor), (void*)stack_frame->frame_base, NULL);
+ } else {
+ xbt_die("No address");
+ }
+
+ xbt_dynar_push(result, &new_var);
+ }
+
+ // Recursive processing of nested scopes:
+ dw_frame_t nested_scope = NULL;
+ xbt_dynar_foreach(scope->scopes, cursor, nested_scope) {
+ mc_fill_local_variables_values(stack_frame, nested_scope, result);
+ }
+}
+
+static xbt_dynar_t MC_get_local_variables_values(xbt_dynar_t stack_frames){
+
+ unsigned cursor1 = 0;
+ mc_stack_frame_t stack_frame;
+ xbt_dynar_t variables = xbt_dynar_new(sizeof(local_variable_t), local_variable_free_voidp);
+
+ xbt_dynar_foreach(stack_frames,cursor1,stack_frame) {
+ mc_fill_local_variables_values(stack_frame, stack_frame->frame, variables);
+ }
+
+ return variables;
+}
+
+static void MC_stack_frame_free_voipd(void *s){
+ mc_stack_frame_t stack_frame = *(mc_stack_frame_t*)s;
+ if(stack_frame) {
+ xbt_free(stack_frame->frame_name);
+ xbt_free(stack_frame);
+ }
+}
+
+static xbt_dynar_t MC_unwind_stack_frames(void *stack_context) {
+ xbt_dynar_t result = xbt_dynar_new(sizeof(mc_stack_frame_t), MC_stack_frame_free_voipd);
+
+ unw_cursor_t c;
+
+ // TODO, check condition check (unw_init_local==0 means end of frame)
+ if(unw_init_local(&c, (unw_context_t *)stack_context)!=0) {
+
+ xbt_die("Could not initialize stack unwinding");
+
+ } else while(1) {
+
+ mc_stack_frame_t stack_frame = xbt_new(s_mc_stack_frame_t, 1);
+ xbt_dynar_push(result, &stack_frame);
+
+ stack_frame->unw_cursor = c;
+
+ unw_word_t ip, sp;
+
+ unw_get_reg(&c, UNW_REG_IP, &ip);
+ unw_get_reg(&c, UNW_REG_SP, &sp);
+
+ stack_frame->ip = ip;
+ stack_frame->sp = sp;
+
+ // TODO, use real addresses in frame_t instead of fixing it here
+
+ dw_frame_t frame = MC_find_function_by_ip((void*) ip);
+ stack_frame->frame = frame;
+
+ if(frame) {
+ stack_frame->frame_name = xbt_strdup(frame->name);
+ stack_frame->frame_base = (unw_word_t)mc_find_frame_base(frame, frame->object_info, &c);
+ } else {
+ stack_frame->frame_base = 0;
+ stack_frame->frame_name = NULL;
+ }
+
+ /* Stop before context switch with maestro */
+ if(frame!=NULL && frame->name!=NULL && !strcmp(frame->name, "smx_ctx_sysv_wrapper"))
break;
+
+ int ret = ret = unw_step(&c);
+ if(ret==0) {
+ xbt_die("Unexpected end of stack.");
+ } else if(ret<0) {
+ xbt_die("Error while unwinding stack.");
}
+ }
+
+ if(xbt_dynar_length(result) == 0){
+ XBT_INFO("unw_init_local failed");
+ xbt_abort();
+ }
+
+ return result;
+};
+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->stack_frames = MC_unwind_stack_frames(current_stack->context);
+ st->local_variables = MC_get_local_variables_values(st->stack_frames);
+
+ unw_word_t sp = xbt_dynar_get_as(st->stack_frames, 0, mc_stack_frame_t)->sp;
+ st->stack_pointer = ((char *)heap + (size_t)(((char *)((long)sp) - (char*)std_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;
+
}
-void MC_free_snapshot(mc_snapshot_t snapshot)
-{
+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);
+
+ /* 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);
+ if(_sg_mc_hash && snapshot->stacks!=NULL) {
+ snapshot->hash = mc_hash_processes_state(num_state, snapshot->stacks);
+ } else {
+ snapshot->hash = 0;
+ }
+ }
+ else {
+ snapshot->hash = 0;
+ }
+
+ if(num_state > 0)
+ MC_dump_checkpoint_ignore(snapshot);
+
+ // mprotect the region after zero-ing ignored parts:
+ /*size_t i;
+ for(i=0; i!=NB_REGIONS; ++i) {
+ mc_mem_region_t region = snapshot->regions[i];
+ mprotect(region->data, region->size, PROT_READ);
+ }*/
+
+ return 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++){
+ // For privatized, variables we decided it was not necessary to take the snapshot:
+ if(snapshot->regions[i])
+ MC_region_restore(snapshot->regions[i]);
+ }
- xbt_free(snapshot);
+ if(snapshot->privatization_regions) {
+ for (i=0; i< SIMIX_process_count(); i++){
+ if(snapshot->privatization_regions[i]) {
+ MC_region_restore(snapshot->privatization_regions[i]);
+ }
+ }
+ switch_data_segment(snapshot->privatization_index);
+ }
+}
+
+void* mc_translate_address(uintptr_t addr, mc_snapshot_t snapshot) {
+
+ // If not in a process state/clone:
+ if(!snapshot) {
+ return (uintptr_t*) addr;
+ }
+
+ // If it is in a snapshot:
+ for(size_t i=0; i!=NB_REGIONS; ++i) {
+ mc_mem_region_t region = snapshot->regions[i];
+ uintptr_t start = (uintptr_t) region->start_addr;
+ uintptr_t end = start + region->size;
+
+ // The address is in this region:
+ if(addr >= start && addr < end) {
+ uintptr_t offset = addr - start;
+ return (void*) ((uintptr_t)region->data + offset);
+ }
+
+ }
+
+ // It is not in a snapshot:
+ return (void*) addr;
}
+uintptr_t mc_untranslate_address(void* addr, mc_snapshot_t snapshot) {
+ if(!snapshot) {
+ return (uintptr_t) addr;
+ }
+
+ for(size_t i=0; i!=NB_REGIONS; ++i) {
+ mc_mem_region_t region = snapshot->regions[i];
+ if(addr>=region->data && addr<=(void*)(((char*)region->data)+region->size)) {
+ size_t offset = (size_t) ((char*) addr - (char*) region->data);
+ return ((uintptr_t) region->start_addr) + offset;
+ }
+ }
+ return (uintptr_t) addr;
+}
+
+mc_snapshot_t SIMIX_pre_mc_snapshot(smx_simcall_t simcall){
+ return MC_take_snapshot(1);
+}
+
+void *MC_snapshot(void){
+ return simcall_mc_snapshot();
+}
