-#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"
+
+
+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);
-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 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);
+
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);
+ 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);
+ }
+
+ 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);
+ 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++;
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 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);
+ }
+ }
+ }
+ i++;
+ }
+
+ /* FIXME: free the memory map */
+}
+
+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();
- /* Save all the writable mapped pages except the raw_heap and the stack */
- for (i = 0; i < maps->mapsize; i++) {
+ for(i=0; i< snapshot->num_reg; i++){
+ MC_region_destroy(snapshot->regions[i]);
+ }
+
+ snapshot->num_reg = 0;
+
+ i = 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) && reg.start_addr != raw_heap
- && (reg.pathname == NULL || 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);
+ } 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);
+ }
+ }
+ }
}
+ i++;
}
+
+ /* FIXME: free the memory map */
}
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]);
+ 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;
+ }
+
+ }
+
}
void MC_free_snapshot(mc_snapshot_t snapshot)
xbt_free(snapshot);
}
+
+static int data_program_region_compare(void *d1, void *d2, size_t size);
+static int data_libsimgrid_region_compare(void *d1, void *d2, size_t size);
+
+static int data_program_region_compare(void *d1, void *d2, size_t size){
+ int distance = 0;
+ int i;
+
+ for(i=0; i<size; i++){
+ if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
+ fprintf(stderr,"Different byte (offset=%d) (%p - %p) in data program region\n", i, (char *)d1 + i, (char *)d2 + i);
+ distance++;
+ }
+ }
+
+ fprintf(stderr, "Hamming distance between data program regions : %d\n", distance);
+
+ return distance;
+}
+
+int data_libsimgrid_region_compare(void *d1, void *d2, size_t size){
+ int distance = 0;
+ int i;
+
+ for(i=0; i<size; i++){
+ if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
+ fprintf(stderr, "Different byte (offset=%d) (%p - %p) in data libsimgrid region\n", i, (char *)d1 + i, (char *)d2 + i);
+ distance++;
+ }
+ }
+
+ fprintf(stderr, "Hamming distance between data libsimgrid regions : %d\n", distance);
+
+ return distance;
+}
+
+int snapshot_compare(mc_snapshot_t s1, mc_snapshot_t s2){
+
+
+ if(s1->num_reg != s2->num_reg){
+ XBT_INFO("Different num_reg (s1 = %u, s2 = %u)", s1->num_reg, s2->num_reg);
+ return 1;
+ }
+
+ int i;
+ int errors = 0;
+
+ for(i=0 ; i< s1->num_reg ; i++){
+
+ if(s1->regions[i]->type != s2->regions[i]->type){
+ XBT_INFO("Different type of region");
+ errors++;
+ }
+
+ switch(s1->regions[i]->type){
+ case 0:
+ if(s1->regions[i]->size != s2->regions[i]->size){
+ XBT_INFO("Different size of heap (s1 = %zu, s2 = %zu)", s1->regions[i]->size, s2->regions[i]->size);
+ errors++;
+ }
+ if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
+ XBT_INFO("Different start addr of heap (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
+ errors++;
+ }
+ if(mmalloc_compare_heap(s1->regions[i]->data, s2->regions[i]->data)){
+ XBT_INFO("Different heap (mmalloc_compare)");
+ errors++;
+ }
+ break;
+ case 1 :
+ if(s1->regions[i]->size != s2->regions[i]->size){
+ XBT_INFO("Different size of libsimgrid (s1 = %zu, s2 = %zu)", s1->regions[i]->size, s2->regions[i]->size);
+ errors++;
+ }
+ if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
+ XBT_INFO("Different start addr of libsimgrid (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
+ errors++;
+ }
+ if(data_libsimgrid_region_compare(s1->regions[i]->data, s2->regions[i]->data, s1->regions[i]->size) != 0){
+ XBT_INFO("Different memcmp for data in libsimgrid");
+ errors++;
+ }
+ break;
+ case 2 :
+ if(s1->regions[i]->size != s2->regions[i]->size){
+ XBT_INFO("Different size of data program (s1 = %zu, s2 = %zu)", s1->regions[i]->size, s2->regions[i]->size);
+ errors++;
+ }
+ if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
+ XBT_INFO("Different start addr of data program (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
+ errors++;
+ }
+ if(data_program_region_compare(s1->regions[i]->data, s2->regions[i]->data, s1->regions[i]->size) != 0){
+ XBT_INFO("Different memcmp for data in program");
+ errors++;
+ }
+ break;
+ default:
+ break;
+ }
+ }
+
+ return (errors > 0);
+
+}
+
