-/* Copyright (c) 2008-2013. The SimGrid Team.
+/* 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 <unistd.h>
+
+#include <string.h>
+#include <link.h>
+#include <dirent.h>
+
+#include "internal_config.h"
#include "mc_private.h"
#include "xbt/module.h"
+#include <xbt/mmalloc.h>
+#include "../smpi/private.h"
+#include <alloca.h>
+
+#include "xbt/mmalloc/mmprivate.h"
#include "../simix/smx_private.h"
+#define UNW_LOCAL_ONLY
#include <libunwind.h>
+#include <libelf.h>
+
+#include "mc_private.h"
+#include <mc/mc.h>
+
+#include "mc_mmu.h"
XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_checkpoint, mc,
"Logging specific to mc_checkpoint");
-void *start_text_libsimgrid;
-void *start_plt_libsimgrid, *end_plt_libsimgrid;
-void *start_got_plt_libsimgrid, *end_got_plt_libsimgrid;
-void *start_plt_binary, *end_plt_binary;
-void *start_got_plt_binary, *end_got_plt_binary;
char *libsimgrid_path;
-void *start_data_libsimgrid, *start_bss_libsimgrid;
-void *start_data_binary, *start_bss_binary;
-void *start_text_binary;
/************************************ Free functions **************************************/
/*****************************************************************************************/
-static void MC_snapshot_stack_free(mc_snapshot_stack_t s){
- if(s){
+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){
+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);
+static void local_variable_free(local_variable_t v)
+{
xbt_free(v->name);
- xbt_free(v->type);
xbt_free(v);
}
-static void local_variable_free_voidp(void *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)
+void MC_region_destroy(mc_mem_region_t reg)
{
+ if (!reg)
+ return;
+
+ //munmap(reg->data, reg->size);
xbt_free(reg->data);
+ if (reg->page_numbers) {
+ mc_free_page_snapshot_region(reg->page_numbers, mc_page_count(reg->size));
+ }
xbt_free(reg);
}
-void MC_free_snapshot(mc_snapshot_t snapshot){
+void MC_free_snapshot(mc_snapshot_t snapshot)
+{
unsigned int i;
- for(i=0; i < NB_REGIONS; 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_dynar_free(&snapshot->ignored_data);
+
+ if (snapshot->privatization_regions) {
+ size_t n = xbt_dynar_length(snapshot->enabled_processes);
+ for (i = 0; i != n; ++i) {
+ MC_region_destroy(snapshot->privatization_regions[i]);
+ }
+ xbt_free(snapshot->privatization_regions);
+ }
+
xbt_free(snapshot);
}
-
/******************************* Snapshot regions ********************************/
/*********************************************************************************/
-static mc_mem_region_t MC_region_new(int type, void *start_addr, size_t size)
+static mc_mem_region_t mc_region_new_dense(int type, void *start_addr, void* permanent_addr, size_t size, mc_mem_region_t ref_reg)
{
- mc_mem_region_t new_reg = xbt_new0(s_mc_mem_region_t, 1);
+ mc_mem_region_t new_reg = xbt_new(s_mc_mem_region_t, 1);
new_reg->start_addr = start_addr;
+ new_reg->permanent_addr = permanent_addr;
+ new_reg->data = NULL;
new_reg->size = size;
- new_reg->data = xbt_malloc0(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);
-
+ new_reg->page_numbers = NULL;
+ new_reg->data = xbt_malloc(size);
+ memcpy(new_reg->data, permanent_addr, size);
+ XBT_DEBUG("New region : type : %d, data : %p (real addr %p), size : %zu",
+ type, new_reg->data, permanent_addr, size);
return new_reg;
+
+}
+
+/** @brief Take a snapshot of a given region
+ *
+ * @param type
+ * @param start_addr Address of the region in the simulated process
+ * @param permanent_addr Permanent address of this data (for privatized variables, this is the virtual address of the privatized mapping)
+ * @param size Size of the data*
+ * @param ref_reg Reference corresponding region
+ */
+static mc_mem_region_t MC_region_new(int type, void *start_addr, void* permanent_addr, size_t size, mc_mem_region_t ref_reg)
+{
+ if (_sg_mc_sparse_checkpoint) {
+ return mc_region_new_sparse(type, start_addr, permanent_addr, size, ref_reg);
+ } else {
+ return mc_region_new_dense(type, start_addr, permanent_addr, size, ref_reg);
+ }
}
-static void MC_region_restore(mc_mem_region_t reg)
+/** @brief Restore a region from a snapshot
+ *
+ * If we are using per page snapshots, it is possible to use the reference
+ * region in order to do an incremental restoration of the region: the
+ * softclean pages which are shared between the two snapshots do not need
+ * to be restored.
+ *
+ * @param reg Target region
+ * @param reg_reg Current region (if not NULL), used for lazy per page restoration
+ */
+static void MC_region_restore(mc_mem_region_t reg, mc_mem_region_t ref_reg)
{
/*FIXME: check if start_addr is still mapped, if it is not, then map it
before copying the data */
-
- memcpy(reg->start_addr, reg->data, reg->size);
+ if (!reg->page_numbers) {
+ memcpy(reg->permanent_addr, reg->data, reg->size);
+ } else {
+ mc_region_restore_sparse(reg, ref_reg);
+ }
return;
}
-static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type, void *start_addr, size_t size)
+static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type,
+ void *start_addr, void* permanent_addr, size_t size)
+
{
- mc_mem_region_t new_reg = MC_region_new(type, start_addr, size);
+ mc_mem_region_t ref_reg =
+ mc_model_checker->parent_snapshot ? mc_model_checker->parent_snapshot->regions[type] : NULL;
+ mc_mem_region_t new_reg = MC_region_new(type, start_addr, permanent_addr, size, ref_reg);
snapshot->regions[type] = new_reg;
return;
-}
-
-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){
+static void MC_get_memory_regions(mc_snapshot_t snapshot)
+{
- /* Wipeout the new line character */
- line[read - 1] = '\0';
+ void *start_heap = std_heap->base;
+ void *end_heap = std_heap->breakval;
+ MC_snapshot_add_region(snapshot, 0, start_heap, start_heap,
+ (char *) end_heap - (char *) start_heap);
+ snapshot->heap_bytes_used = mmalloc_get_bytes_used(std_heap);
+ snapshot->privatization_regions = NULL;
+
+ MC_snapshot_add_region(snapshot, 1,
+ mc_libsimgrid_info->start_rw, mc_libsimgrid_info->start_rw,
+ mc_libsimgrid_info->end_rw - mc_libsimgrid_info->start_rw);
+
+#ifdef HAVE_SMPI
+ size_t i;
+ if (smpi_privatize_global_variables && smpi_process_count()) {
+ // Snapshot the global variable of the application separately for each
+ // simulated process:
+ snapshot->privatization_regions =
+ xbt_new(mc_mem_region_t, smpi_process_count());
+ for (i = 0; i < smpi_process_count(); i++) {
+ mc_mem_region_t ref_reg =
+ mc_model_checker->parent_snapshot ? mc_model_checker->parent_snapshot->privatization_regions[i] : NULL;
+ snapshot->privatization_regions[i] =
+ MC_region_new(-1, mc_binary_info->start_rw, smpi_privatisation_regions[i].address, size_data_exe, ref_reg);
+ }
+ snapshot->privatization_index = smpi_loaded_page;
+ snapshot->regions[2] = NULL;
+ } else
+#endif
+ {
+ MC_snapshot_add_region(snapshot, 2,
+ mc_binary_info->start_rw, mc_binary_info->start_rw,
+ mc_binary_info->end_rw - mc_binary_info->start_rw);
+ snapshot->privatization_regions = NULL;
+ snapshot->privatization_index = -1;
+ }
+}
- /* Tokenize the line using spaces as delimiters and store each token */
- lfields[0] = strtok(line, " ");
+/** @brief Finds the range of the different memory segments and binary paths */
+void MC_init_memory_map_info()
+{
- for (i = 1; i < 6 && lfields[i - 1] != NULL; i++) {
- lfields[i] = strtok(NULL, " ");
- }
+ unsigned int i = 0;
+ s_map_region_t reg;
+ memory_map_t maps = MC_get_memory_map();
- /* First get the permissions flags, need write permission */
- if(lfields[1][1] == 'w'){
+ maestro_stack_start = NULL;
+ maestro_stack_end = NULL;
+ libsimgrid_path = NULL;
- /* 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);
- }
- }
- }
+ while (i < maps->mapsize) {
+ reg = maps->regions[i];
+ 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++;
}
- free(line);
- fclose(fp);
+ 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_init_memory_map_info(){
-
+/** \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;
- memory_map_t maps = MC_get_memory_map();
-
+ 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 (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
- start_data_libsimgrid = reg.start_addr;
- i++;
- reg = maps->regions[i];
- if(reg.pathname == NULL && (reg.prot & PROT_WRITE) && i < maps->mapsize)
- start_bss_libsimgrid = reg.start_addr;
- }else if (!memcmp(basename(maps->regions[i].pathname), basename(xbt_binary_name), strlen(basename(xbt_binary_name)))){
- start_data_binary = 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){
- start_bss_binary = reg.start_addr;
- i++;
- }
- }else if(!memcmp(maps->regions[i].pathname, "[stack]", 7)){
- maestro_stack_start = reg.start_addr;
- maestro_stack_end = reg.end_addr;
- i++;
- }
- }
- }else if ((reg.prot & PROT_READ) && (reg.prot & PROT_EXEC)){
- if (maps->regions[i].pathname != NULL){
- if (!memcmp(basename(maps->regions[i].pathname), "libsimgrid", 10)){
- start_text_libsimgrid = reg.start_addr;
- libsimgrid_path = strdup(maps->regions[i].pathname);
- }else if (!memcmp(basename(maps->regions[i].pathname), basename(xbt_binary_name), strlen(basename(xbt_binary_name)))){
- start_text_binary = 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++;
}
-
- MC_free_memory_map(maps);
+ xbt_assert(result->file_name);
+ xbt_assert(result->start_rw);
+ xbt_assert(result->start_exec);
}
-void MC_get_libsimgrid_plt_section(){
-
- FILE *fp;
- char *line = NULL; /* Temporal storage for each line that is readed */
- ssize_t read; /* Number of bytes readed */
- size_t n = 0; /* Amount of bytes to read by xbt_getline */
-
- char *lfields[7];
- int i, plt_found = 0;
- unsigned long int size, offset;
-
- char *command = bprintf("objdump --section-headers %s", libsimgrid_path);
-
- fp = popen(command, "r");
-
- if(fp == NULL){
- perror("popen failed");
- xbt_abort();
- }
-
- while ((read = xbt_getline(&line, &n, fp)) != -1 && plt_found != 2) {
+/************************************* Take Snapshot ************************************/
+/****************************************************************************************/
- if(n == 0)
- continue;
+/** \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;
+}
- /* Wipeout the new line character */
- line[read - 1] = '\0';
+static void mc_fill_local_variables_values(mc_stack_frame_t stack_frame,
+ dw_frame_t scope, int process_index, xbt_dynar_t result)
+{
+ void *ip = (void *) stack_frame->ip;
+ if (ip < scope->low_pc || ip >= scope->high_pc)
+ return;
- lfields[0] = strtok(line, " ");
+ unsigned cursor = 0;
+ dw_variable_t current_variable;
+ xbt_dynar_foreach(scope->variables, cursor, current_variable) {
- if(lfields[0] == NULL)
+ if (!mc_valid_variable(current_variable, scope, (void *) stack_frame->ip))
continue;
- if(strcmp(lfields[0], "Sections:") == 0 || strcmp(lfields[0], "Idx") == 0 || strncmp(lfields[0], libsimgrid_path, strlen(libsimgrid_path)) == 0)
- 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) {
+ s_mc_location_t location;
+ mc_dwarf_resolve_locations(&location, ¤t_variable->locations,
+ current_variable->object_info,
+ &(stack_frame->unw_cursor),
+ (void *) stack_frame->frame_base,
+ NULL, process_index);
+
+ switch(mc_get_location_type(&location)) {
+ case MC_LOCATION_TYPE_ADDRESS:
+ new_var->address = location.memory_location;
+ break;
+ case MC_LOCATION_TYPE_REGISTER:
+ default:
+ xbt_die("Cannot handle non-address variable");
+ }
- for (i = 1; i < 7 && lfields[i - 1] != NULL; i++) {
- lfields[i] = strtok(NULL, " ");
+ } else {
+ xbt_die("No address");
}
- if(i>=6){
- if(strcmp(lfields[1], ".plt") == 0){
- size = strtoul(lfields[2], NULL, 16);
- offset = strtoul(lfields[5], NULL, 16);
- start_plt_libsimgrid = (char *)start_text_libsimgrid + offset;
- end_plt_libsimgrid = (char *)start_plt_libsimgrid + size;
- plt_found++;
- }else if(strcmp(lfields[1], ".got.plt") == 0){
- size = strtoul(lfields[2], NULL, 16);
- offset = strtoul(lfields[5], NULL, 16);
- start_got_plt_libsimgrid = (char *)start_text_libsimgrid + offset;
- end_got_plt_libsimgrid = (char *)start_got_plt_libsimgrid + size;
- plt_found++;
- }
-
- }
-
+ xbt_dynar_push(result, &new_var);
}
- xbt_free(command);
- xbt_free(line);
- pclose(fp);
-
-}
-
-void MC_get_binary_plt_section(){
-
- FILE *fp;
- char *line = NULL; /* Temporal storage for each line that is readed */
- ssize_t read; /* Number of bytes readed */
- size_t n = 0; /* Amount of bytes to read by xbt_getline */
-
- char *lfields[7];
- int i, plt_found = 0;
- unsigned long int size;
-
- char *command = bprintf( "objdump --section-headers %s", xbt_binary_name);
-
- fp = popen(command, "r");
-
- if(fp == NULL){
- perror("popen failed");
- xbt_abort();
+ // 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, process_index, result);
}
+}
- while ((read = xbt_getline(&line, &n, fp)) != -1 && plt_found != 2) {
-
- if(n == 0)
- continue;
-
- /* Wipeout the new line character */
- line[read - 1] = '\0';
-
- lfields[0] = strtok(line, " ");
-
- if(lfields[0] == NULL)
- continue;
-
- if(strcmp(lfields[0], "Sections:") == 0 || strcmp(lfields[0], "Idx") == 0 || strncmp(lfields[0], basename(xbt_binary_name), strlen(xbt_binary_name)) == 0)
- continue;
+static xbt_dynar_t MC_get_local_variables_values(xbt_dynar_t stack_frames, int process_index)
+{
- for (i = 1; i < 7 && lfields[i - 1] != NULL; i++) {
- lfields[i] = strtok(NULL, " ");
- }
+ unsigned cursor1 = 0;
+ mc_stack_frame_t stack_frame;
+ xbt_dynar_t variables =
+ xbt_dynar_new(sizeof(local_variable_t), local_variable_free_voidp);
- if(i>=6){
- if(strcmp(lfields[1], ".plt") == 0){
- size = strtoul(lfields[2], NULL, 16);
- start_plt_binary = (void *)strtoul(lfields[3], NULL, 16);
- end_plt_binary = (char *)start_plt_binary + size;
- plt_found++;
- }else if(strcmp(lfields[1], ".got.plt") == 0){
- size = strtoul(lfields[2], NULL, 16);
- start_got_plt_binary = (char *)strtoul(lfields[3], NULL, 16);
- end_got_plt_binary = (char *)start_got_plt_binary + size;
- plt_found++;
- }
- }
-
-
+ xbt_dynar_foreach(stack_frames, cursor1, stack_frame) {
+ mc_fill_local_variables_values(stack_frame, stack_frame->frame, process_index, variables);
}
- xbt_free(command);
- xbt_free(line);
- pclose(fp);
-
+ return variables;
}
-/************************************* 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_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 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_unwind_stack_frames(void *stack_context)
+{
+ xbt_dynar_t result =
+ xbt_dynar_new(sizeof(mc_stack_frame_t), MC_stack_frame_free_voipd);
-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();
- }
+ // TODO, check condition check (unw_init_local==0 means end of frame)
+ if (unw_init_local(&c, (unw_context_t *) stack_context) != 0) {
- unw_word_t ip, sp, off;
- dw_frame_t frame;
+ xbt_die("Could not initialize stack unwinding");
- unsigned int cursor = 0;
- dw_variable_t current_variable;
- dw_location_entry_t entry = NULL;
- dw_location_t location_entry = NULL;
- unw_word_t res;
- int frame_found = 0, region_type;
- void *frame_pointer_address = NULL;
- long true_ip, value;
- int stop = 0;
+ } else
+ while (1) {
- xbt_dynar_t variables = xbt_dynar_new(sizeof(local_variable_t), local_variable_free_voidp);
+ mc_stack_frame_t stack_frame = xbt_new(s_mc_stack_frame_t, 1);
+ xbt_dynar_push(result, &stack_frame);
- while(ret >= 0 && !stop){
+ stack_frame->unw_cursor = c;
- unw_get_reg(&c, UNW_REG_IP, &ip);
- unw_get_reg(&c, UNW_REG_SP, &sp);
+ unw_word_t ip, sp;
- unw_get_proc_name(&c, frame_name, sizeof (frame_name), &off);
+ unw_get_reg(&c, UNW_REG_IP, &ip);
+ unw_get_reg(&c, UNW_REG_SP, &sp);
- if(!strcmp(frame_name, "smx_ctx_sysv_wrapper")) /* Stop before context switch with maestro */
- stop = 1;
+ stack_frame->ip = ip;
+ stack_frame->sp = sp;
- if((long)ip > (long)start_text_libsimgrid)
- frame = xbt_dict_get_or_null(mc_local_variables_libsimgrid, frame_name);
- else
- frame = xbt_dict_get_or_null(mc_local_variables_binary, frame_name);
+ // TODO, use real addresses in frame_t instead of fixing it here
- if(frame == NULL){
- ret = unw_step(&c);
- continue;
- }
-
- true_ip = (long)frame->low_pc + (long)off;
- frame_pointer_address = NULL;
-
- /* Get frame pointer */
- switch(frame->frame_base->type){
- case e_dw_loclist:
- cursor = 0;
- while(cursor < xbt_dynar_length(frame->frame_base->location.loclist) && !frame_found){
- entry = xbt_dynar_get_as(frame->frame_base->location.loclist, cursor, dw_location_entry_t);
- if((true_ip >= entry->lowpc) && (true_ip < entry->highpc)){
- frame_found = 1;
- switch(entry->location->type){
- case e_dw_compose:
- if(xbt_dynar_length(entry->location->location.compose) > 1){
- frame_pointer_address = NULL; /* TODO : location list with optimizations enabled */
- }else{
- location_entry = xbt_dynar_get_as(entry->location->location.compose, 0, dw_location_t);
- switch(location_entry->type){
- case e_dw_register:
- unw_get_reg(&c, location_entry->location.reg, &res);
- frame_pointer_address = (void*)(long)res;
- break;
- case e_dw_bregister_op:
- unw_get_reg(&c, location_entry->location.breg_op.reg, &res);
- frame_pointer_address = (void*)((long)res + location_entry->location.breg_op.offset);
- break;
- default:
- frame_pointer_address = NULL; /* FIXME : implement other cases (with optimizations enabled) */
- break;
- }
- }
- break;
- default:
- frame_pointer_address = NULL; /* FIXME : implement other cases (with optimizations enabled) */
- break;
- }
- }
- cursor++;
- }
- break;
- default :
- frame_pointer_address = NULL; /* FIXME : implement other cases (with optimizations enabled)*/
- break;
- }
+ dw_frame_t frame = MC_find_function_by_ip((void *) ip);
+ stack_frame->frame = frame;
- frame_found = 0;
- cursor = 0;
-
- xbt_dynar_foreach(frame->variables, cursor, current_variable){
-
- if((long)ip > (long)start_text_libsimgrid)
- 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){
- switch(current_variable->address.location->type){
- case e_dw_compose:
- if(xbt_dynar_length(current_variable->address.location->location.compose) > 1){
- /* TODO : location list with optimizations enabled */
- }else{
- location_entry = xbt_dynar_get_as(current_variable->address.location->location.compose, 0, dw_location_t);
-
- switch(location_entry->type){
- case e_dw_register:
- unw_get_reg(&c, location_entry->location.reg, &res);
- value = (long)res;
- break;
- case e_dw_bregister_op:
- unw_get_reg(&c, location_entry->location.breg_op.reg, &res);
- value = (long)res + location_entry->location.breg_op.offset;
- break;
- case e_dw_fbregister_op:
- if(frame_pointer_address != NULL)
- value = (long)((char *)frame_pointer_address + location_entry->location.fbreg_op);
- else
- value = 0;
- break;
- default:
- value = 0; /* FIXME : implement other cases (with optimizations enabled)*/
- break;
- }
-
- if(value)
- new_var->address = (void *)value;
- else
- new_var->address = NULL;
- }
- break;
- default :
- break;
- }
+ 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;
}
- xbt_dynar_push(variables, &new_var);
+ /* 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.");
+ }
}
- ret = unw_step(&c);
-
- }
-
- return variables;
-
-}
-
-
-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){
+ if (xbt_dynar_length(result) == 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)));
-
-}
+ return result;
+};
-static xbt_dynar_t MC_take_snapshot_stacks(mc_snapshot_t *snapshot, void *heap){
+static xbt_dynar_t MC_take_snapshot_stacks(mc_snapshot_t * snapshot)
+{
- xbt_dynar_t res = xbt_dynar_new(sizeof(s_mc_snapshot_stack_t), MC_snapshot_stack_free_voidp);
+ 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){
+
+ 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;
+ st->stack_frames = MC_unwind_stack_frames(current_stack->context);
+ st->local_variables = MC_get_local_variables_values(st->stack_frames, current_stack->process_index);
+ st->process_index = current_stack->process_index;
+
+ unw_word_t sp = xbt_dynar_get_as(st->stack_frames, 0, mc_stack_frame_t)->sp;
+
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)));
+ (*snapshot)->stack_sizes =
+ xbt_realloc((*snapshot)->stack_sizes, (cursor + 1) * sizeof(size_t));
+ (*snapshot)->stack_sizes[cursor] =
+ (char*) current_stack->address + current_stack->size - (char*) sp;
}
return res;
}
-static xbt_dynar_t MC_take_snapshot_ignore(){
-
- if(mc_heap_comparison_ignore == NULL)
+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);
+ 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){
+ 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;
}
-static void MC_dump_checkpoint_ignore(mc_snapshot_t snapshot){
-
+static void mc_free_snapshot_ignored_data_pvoid(void* data) {
+ mc_snapshot_ignored_data_t ignored_data = (mc_snapshot_ignored_data_t) data;
+ free(ignored_data->data);
+}
+
+static void MC_snapshot_handle_ignore(mc_snapshot_t snapshot)
+{
+ snapshot->ignored_data = xbt_dynar_new(sizeof(s_mc_snapshot_ignored_data_t), mc_free_snapshot_ignored_data_pvoid);
+
+ // Copy the memory:
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);
- }
+ xbt_dynar_foreach (mc_checkpoint_ignore, cursor, region) {
+ s_mc_snapshot_ignored_data_t ignored_data;
+ ignored_data.start = region->addr;
+ ignored_data.size = region->size;
+ ignored_data.data = malloc(region->size);
+ memcpy(ignored_data.data, region->addr, region->size);
+ xbt_dynar_push(snapshot->ignored_data, &ignored_data);
+ }
+
+ // Zero the memory:
+ xbt_dynar_foreach (mc_checkpoint_ignore, cursor, region) {
+ memset(region->addr, 0, region->size);
}
}
+static void MC_snapshot_ignore_restore(mc_snapshot_t snapshot)
+{
+ unsigned int cursor = 0;
+ s_mc_snapshot_ignored_data_t ignored_data;
+ xbt_dynar_foreach (snapshot->ignored_data, cursor, ignored_data) {
+ memcpy(ignored_data.start, ignored_data.data, ignored_data.size);
+ }
+}
-mc_snapshot_t MC_take_snapshot(int num_state){
+/** @brief Can we remove this snapshot?
+ *
+ * Some snapshots cannot be removed (yet) because we need them
+ * at this point.
+ *
+ * @param snapshot
+ */
+int mc_important_snapshot(mc_snapshot_t snapshot)
+{
+ // We need this snapshot in order to know which
+ // pages needs to be stored in the next snapshot.
+ // This field is only non-NULL when using soft-dirty
+ // page tracking.
+ if (snapshot == mc_model_checker->parent_snapshot)
+ return true;
+
+ return false;
+}
+
+static void MC_get_current_fd(mc_snapshot_t snapshot){
+
+ snapshot->total_fd = 0;
+
+ const size_t fd_dir_path_size = 20;
+ char fd_dir_path[fd_dir_path_size];
+ if (snprintf(fd_dir_path, fd_dir_path_size,
+ "/proc/%lli/fd", (long long int) getpid()) > fd_dir_path_size)
+ xbt_die("Unexpected buffer is too small for fd_dir_path");
+
+ DIR* fd_dir = opendir (fd_dir_path);
+ if (fd_dir == NULL)
+ xbt_die("Cannot open directory '/proc/self/fd'\n");
+
+ size_t total_fd = 0;
+ struct dirent* fd_number;
+ while ((fd_number = readdir(fd_dir))) {
+
+ int fd_value = atoi(fd_number->d_name);
+
+ if(fd_value < 3)
+ continue;
+
+ const size_t source_size = 25;
+ char source[25];
+ if (snprintf(source, source_size, "/proc/self/fd/%s", fd_number->d_name) > source_size)
+ xbt_die("Unexpected buffer is too small for fd %s", fd_number->d_name);
+
+ const size_t link_size = 200;
+ char link[200];
+ int res = readlink(source, link, link_size);
+ if (res<0) {
+ xbt_die("Could not read link for %s", source);
+ }
+ if (res==200) {
+ xbt_die("Buffer to small for link of %s", source);
+ }
+ link[res] = '\0';
+
+ if(smpi_is_privatisation_file(link))
+ continue;
+
+ // This is (probably) the DIR* we are reading:
+ // TODO, read all the file entries at once and close the DIR.*
+ if(strcmp(fd_dir_path, link) == 0)
+ continue;
+
+ // We don't handle them.
+ // It does not mean we should silently ignore them however.
+ if (strncmp(link, "pipe:", 5) == 0 || strncmp(link, "socket:", 7) == 0)
+ continue;
+
+ // This is probably a shared memory used by lttng-ust:
+ if(strncmp("/dev/shm/ust-shm-tmp-", link, 21)==0)
+ continue;
+
+ // Add an entry for this FD in the snapshot:
+ fd_infos_t fd = xbt_new0(s_fd_infos_t, 1);
+ fd->filename = strdup(link);
+ fd->number = fd_value;
+ fd->flags = fcntl(fd_value, F_GETFL) | fcntl(fd_value, F_GETFD) ;
+ fd->current_position = lseek(fd_value, 0, SEEK_CUR);
+ snapshot->current_fd = xbt_realloc(snapshot->current_fd, (total_fd + 1) * sizeof(fd_infos_t));
+ snapshot->current_fd[total_fd] = fd;
+ total_fd++;
+ }
+
+ snapshot->total_fd = total_fd;
+ closedir (fd_dir);
+}
+
+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);
+ snapshot->enabled_processes = xbt_dynar_new(sizeof(int), NULL);
+ smx_process_t process;
+ xbt_swag_foreach(process, simix_global->process_list) {
+ xbt_dynar_push_as(snapshot->enabled_processes, int, (int)process->pid);
+ }
+
+ MC_snapshot_handle_ignore(snapshot);
+
+ MC_get_current_fd(snapshot);
/* Save the std heap and the writable mapped pages of libsimgrid and binary */
MC_get_memory_regions(snapshot);
+ if (_sg_mc_sparse_checkpoint && _sg_mc_soft_dirty) {
+ mc_softdirty_reset();
+ }
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 (_sg_mc_visited > 0 || strcmp(_sg_mc_property_file, "")) {
+ snapshot->stacks =
+ MC_take_snapshot_stacks(&snapshot);
+ 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);
-
+ MC_snapshot_ignore_restore(snapshot);
+ if (_sg_mc_sparse_checkpoint && _sg_mc_soft_dirty) {
+ mc_model_checker->parent_snapshot = snapshot;
+ }
return snapshot;
-
}
-void MC_restore_snapshot(mc_snapshot_t snapshot){
+void MC_restore_snapshot(mc_snapshot_t snapshot)
+{
+ mc_snapshot_t parent_snapshot = mc_model_checker->parent_snapshot;
+
+ int new_fd;
unsigned int i;
- for(i=0; i < NB_REGIONS; i++){
- MC_region_restore(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],
+ parent_snapshot ? parent_snapshot->regions[i] : NULL);
+ }
+
+#ifdef HAVE_SMPI
+ if (snapshot->privatization_regions) {
+ // Restore the global variables of the application separately for each
+ // simulated process:
+ for (i = 0; i < smpi_process_count(); i++) {
+ if (snapshot->privatization_regions[i]) {
+ MC_region_restore(snapshot->privatization_regions[i],
+ parent_snapshot ? parent_snapshot->privatization_regions[i] : NULL);
+ }
+ }
+ }
+ if(snapshot->privatization_index >= 0) {
+ // We just rewrote the global variables.
+ // The privatisation segment SMPI thinks
+ // is mapped might be inconsistent with the segment which
+ // is really mapped in memory (kernel state).
+ // We ask politely SMPI to map the segment anyway,
+ // even if it thinks it is the current one:
+ smpi_really_switch_data_segment(snapshot->privatization_index);
+ }
+#endif
+
+ for(i=0; i < snapshot->total_fd; i++){
+
+ new_fd = open(snapshot->current_fd[i]->filename, snapshot->current_fd[i]->flags);
+ if (new_fd <0) {
+ xbt_die("Could not reopen the file %s fo restoring the file descriptor",
+ snapshot->current_fd[i]->filename);
+ }
+ if(new_fd != -1 && new_fd != snapshot->current_fd[i]->number){
+ dup2(new_fd, snapshot->current_fd[i]->number);
+ //fprintf(stderr, "%p\n", fdopen(snapshot->current_fd[i]->number, "rw"));
+ close(new_fd);
+ };
+ lseek(snapshot->current_fd[i]->number, snapshot->current_fd[i]->current_position, SEEK_SET);
+ }
+
+ if (_sg_mc_sparse_checkpoint && _sg_mc_soft_dirty) {
+ mc_softdirty_reset();
+ }
+
+ MC_snapshot_ignore_restore(snapshot);
+ if (_sg_mc_sparse_checkpoint && _sg_mc_soft_dirty) {
+ mc_model_checker->parent_snapshot = snapshot;
}
}
-mc_snapshot_t SIMIX_pre_mc_snapshot(smx_simcall_t simcall){
+mc_snapshot_t simcall_HANDLER_mc_snapshot(smx_simcall_t simcall)
+{
return MC_take_snapshot(1);
}
-void *MC_snapshot(void){
+void *MC_snapshot(void)
+{
return simcall_mc_snapshot();
}