-#include "private.h"
+/* Copyright (c) 2008-2012 Da SimGrid Team. All rights reserved. */
-static mc_mem_region_t MC_region_new(void *start_addr, size_t size);
+/* 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>
+#include "mc_private.h"
+#include "xbt/module.h"
+
+#include "../simix/smx_private.h"
+
+#include <libunwind.h>
+
+XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_checkpoint, mc,
+ "Logging specific to mc_checkpoint");
+
+void *start_text_libsimgrid;
+void *start_plt, *end_plt;
+char *libsimgrid_path;
+
+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);
-static void MC_snapshot_add_region(mc_snapshot_t snapshot, void *start_addr, size_t size);
+static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type, void *start_addr, size_t size);
-static mc_mem_region_t MC_region_new(void *start_addr, size_t size)
+static void add_value(xbt_dynar_t *list, const char *type, unsigned long int val);
+static xbt_dynar_t take_snapshot_stacks(void *heap);
+static void get_local_variables_values(xbt_dynar_t *all_variables, stack_region_t stack, void *heap);
+static void print_local_variables_values(xbt_dynar_t all_variables);
+
+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);
memcpy(new_reg->data, start_addr, size);
+
+ XBT_DEBUG("New region : type : %d, data : %p, size : %zu", type, new_reg->data, size);
+
return new_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);
+
+ return;
}
static void MC_region_destroy(mc_mem_region_t reg)
xbt_free(reg);
}
-static void MC_snapshot_add_region(mc_snapshot_t snapshot, void *start_addr, size_t size)
+static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type, void *start_addr, size_t size)
{
- mc_mem_region_t new_reg = MC_region_new(start_addr, size);
+ 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++;
void MC_take_snapshot(mc_snapshot_t snapshot)
{
- unsigned int i;
- s_map_region reg;
+ unsigned int i = 0;
+ s_map_region_t reg;
memory_map_t maps = get_memory_map();
- /* Save all the writable mapped pages except the and the stack */
- for (i = 0; i < maps->mapsize; i++) {
+ /* Save the std heap and the writable mapped pages of libsimgrid */
+ while (i < maps->mapsize) {
reg = maps->regions[i];
- if((reg.prot & PROT_WRITE)
- && (reg.pathname == NULL
- || (strncmp(reg.pathname, "/dev/zero", 9)
- && strncmp(reg.pathname, "[stack]", 7)))){
- MC_snapshot_add_region(snapshot, reg.start_addr,
- (char*)reg.end_addr - (char*)reg.start_addr);
+ 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);
+ }
+ }
}
+ i++;
}
+
+ 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();
+ int nb_reg = 0;
+ void *heap = NULL;
+
+ /* Save the std heap and the writable mapped pages of libsimgrid */
+ while (i < maps->mapsize && nb_reg < 3) {
+ 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);
+ heap = snapshot->regions[nb_reg]->data;
+ nb_reg++;
+ }
+ } 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);
+ nb_reg++;
+ } 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);
+ nb_reg++;
+ }
+ }
+ }
+ }else if ((reg.prot & PROT_READ)){
+ 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);
+ }
+ }
+ }
+ i++;
+ }
+
+ snapshot->stacks = take_snapshot_stacks(heap);
+
+ free_memory_map(maps);
+
}
void MC_restore_snapshot(mc_snapshot_t snapshot)
{
unsigned int i;
- for(i=0; i < snapshot->num_reg; i++)
+ for(i=0; i < snapshot->num_reg; i++){
MC_region_restore(snapshot->regions[i]);
+ }
+
}
void MC_free_snapshot(mc_snapshot_t snapshot)
xbt_free(snapshot);
}
+
+
+void get_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 getline */
+
+ char *lfields[7];
+ int i, plt_not_found = 1;
+ unsigned long int size, offset;
+
+ char *command = bprintf( "objdump --section-headers %s", libsimgrid_path);
+
+ fp = popen(command, "r");
+
+ if(fp == NULL)
+ perror("popen failed");
+
+ while ((read = getline(&line, &n, fp)) != -1 && plt_not_found == 1) {
+
+ 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 || strcmp(lfields[0], "libsimgrid.so:") == 0)
+ continue;
+
+ for (i = 1; i < 7 && lfields[i - 1] != NULL; i++) {
+ lfields[i] = strtok(NULL, " ");
+ }
+
+ if(i>=5){
+ if(strcmp(lfields[1], ".plt") == 0){
+ size = strtoul(lfields[2], NULL, 16);
+ offset = strtoul(lfields[4], NULL, 16);
+ start_plt = (char *)start_text_libsimgrid + offset;
+ end_plt = (char *)start_plt + size;
+ plt_not_found = 0;
+ }
+ }
+
+
+ }
+
+ free(command);
+ free(line);
+ pclose(fp);
+
+}
+
