#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;
+void *start_plt_libsimgrid, *end_plt_libsimgrid;
+void *start_plt_binary, *end_plt_binary;
char *libsimgrid_path;
+void *start_data_libsimgrid;
+void *start_text_binary;
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_snapshot_add_region(mc_snapshot_t snapshot, int type, void *start_addr, size_t size);
-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 void add_value(xbt_dynar_t *list, const char *type, unsigned long int val);
+static xbt_dynar_t take_snapshot_stacks(void *heap);
+static xbt_strbuff_t get_local_variables_values(stack_region_t stack, void *heap);
+static void print_local_variables_values(xbt_dynar_t all_variables);
+static void *get_stack_pointer(stack_region_t stack, void *heap);
static mc_mem_region_t MC_region_new(int type, void *start_addr, size_t size)
{
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) {
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++;
+ start_data_libsimgrid = 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 (!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;
+ }
}
}
}
i++;
}
+
+ snapshot->stacks = take_snapshot_stacks(heap);
free_memory_map(maps);
xbt_free(snapshot);
}
-static int data_program_region_compare(void *d1, void *d2, size_t size){
- int distance = 0;
- size_t i = 0;
-
- for(i=0; i<size; i++){
- if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
- XBT_DEBUG("Different byte (offset=%zu) (%p - %p) in data program region", i, (char *)d1 + i, (char *)d2 + i);
- distance++;
- }
- }
-
- XBT_DEBUG("Hamming distance between data program regions : %d", distance);
- return distance;
-}
+void get_libsimgrid_plt_section(){
-static int data_libsimgrid_region_compare(void *d1, void *d2, size_t size){
- int distance = 0;
- size_t i = 0;
- int pointer_align;
- void *addr_pointed1 = NULL, *addr_pointed2 = NULL;
-
- for(i=0; i<size; i++){
- if(memcmp(((char *)d1) + i, ((char *)d2) + i, 1) != 0){
- pointer_align = (i / sizeof(void*)) * sizeof(void*);
- addr_pointed1 = *((void **)((char *)d1 + pointer_align));
- addr_pointed2 = *((void **)((char *)d2 + pointer_align));
- if((addr_pointed1 > start_plt && addr_pointed1 < end_plt) || (addr_pointed2 > start_plt && addr_pointed2 < end_plt)){
- continue;
- }else{
- XBT_DEBUG("Different byte (offset=%zu) (%p - %p) in data libsimgrid region", i, (char *)d1 + i, (char *)d2 + i);
- XBT_DEBUG("Addresses pointed : %p - %p\n", addr_pointed1, addr_pointed2);
- distance++;
- }
- }
- }
-
- XBT_DEBUG("Hamming distance between data libsimgrid regions : %d", distance); fflush(NULL);
-
- return distance;
-}
+ 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 */
-int snapshot_compare(mc_snapshot_t s1, mc_snapshot_t s2){
+ char *lfields[7];
+ int i, plt_not_found = 1;
+ unsigned long int size, offset;
- int errors = 0, i;
-
- if(s1->num_reg != s2->num_reg){
- XBT_DEBUG("Different num_reg (s1 = %u, s2 = %u)", s1->num_reg, s2->num_reg);
- return 1;
- }
+ char *command = bprintf( "objdump --section-headers %s", libsimgrid_path);
- for(i=0 ; i< s1->num_reg ; i++){
-
- if(s1->regions[i]->type != s2->regions[i]->type){
- XBT_INFO("Different type of region");
- errors++;
+ 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, " ");
}
-
- switch(s1->regions[i]->type){
- case 0 :
- /* Compare heapregion */
- if(s1->regions[i]->size != s2->regions[i]->size){
- XBT_DEBUG("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_DEBUG("Different start addr of heap (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
- errors++;
- }
- if(mmalloc_compare_heap((xbt_mheap_t)s1->regions[i]->data, (xbt_mheap_t)s2->regions[i]->data)){
- XBT_DEBUG("Different heap (mmalloc_compare)");
- errors++;
- }
- break;
- case 1 :
- /* Compare data libsimgrid region */
- if(s1->regions[i]->size != s2->regions[i]->size){
- XBT_DEBUG("Different size of libsimgrid (data) (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_DEBUG("Different start addr of libsimgrid (data) (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_DEBUG("Different memcmp for data in libsimgrid");
- errors++;
- }
- break;
- case 2 :
- /* Compare data program region */
- if(s1->regions[i]->size != s2->regions[i]->size){
- XBT_DEBUG("Different size of data program (s1 = %zu, s2 = %zu)", s1->regions[i]->size, s2->regions[i]->size);
- //errors++;
- return 1;
- }
- if(s1->regions[i]->start_addr != s2->regions[i]->start_addr){
- XBT_DEBUG("Different start addr of data program (s1 = %p, s2 = %p)", s1->regions[i]->start_addr, s2->regions[i]->start_addr);
- //errors++;
- return 1;
- }
- if(data_program_region_compare(s1->regions[i]->data, s2->regions[i]->data, s1->regions[i]->size) != 0){
- XBT_DEBUG("Different memcmp for data in program");
- //errors++;
- return 1;
+ if(i>=5){
+ 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_not_found = 0;
}
- break;
-
}
-
+
+
}
+ free(command);
+ free(line);
+ pclose(fp);
- return errors > 0;
-
}
-void get_plt_section(){
+void get_binary_plt_section(){
FILE *fp;
char *line = NULL; /* Temporal storage for each line that is readed */
int i, plt_not_found = 1;
unsigned long int size, offset;
- char *command = bprintf( "objdump --section-headers %s", libsimgrid_path);
+ char *command = bprintf( "objdump --section-headers %s", xbt_binary_name);
fp = popen(command, "r");
if(n == 0)
continue;
- /* Wipeout the new line character */
+ /* 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)
+ if(strcmp(lfields[0], "Sections:") == 0 || strcmp(lfields[0], "Idx") == 0 || strcmp(lfields[0], basename(xbt_binary_name)) == 0)
continue;
for (i = 1; i < 7 && lfields[i - 1] != NULL; i++) {
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;
+ offset = strtoul(lfields[5], NULL, 16);
+ start_plt_binary = (char *)start_text_binary + offset;
+ end_plt_binary = (char *)start_plt_binary + size;
plt_not_found = 0;
}
}
}
+static void add_value(xbt_dynar_t *list, const char *type, unsigned long int val){
+ variable_value_t value = xbt_new0(s_variable_value_t, 1);
+ value->type = strdup(type);
+ if(strcmp(type, "value") == 0){
+ value->value.res = val;
+ }else{
+ value->value.address = (void *)val;
+ }
+ xbt_dynar_push(*list, &value);
+}
+
+static xbt_dynar_t take_snapshot_stacks(void *heap){
+
+ xbt_dynar_t res = xbt_dynar_new(sizeof(s_mc_snapshot_stack_t), NULL);
+
+ unsigned int cursor1 = 0;
+ stack_region_t current_stack;
+
+ xbt_dynar_foreach(stacks_areas, cursor1, current_stack){
+ mc_snapshot_stack_t st = xbt_new(s_mc_snapshot_stack_t, 1);
+ st->local_variables = get_local_variables_values(current_stack, heap);
+ st->stack_pointer = get_stack_pointer(current_stack, heap);
+ xbt_dynar_push(res, &st);
+ }
+
+ return res;
+
+}
+
+static void *get_stack_pointer(stack_region_t stack, void *heap){
+
+ unw_cursor_t c;
+ int ret;
+ unw_word_t sp;
+
+ ret = unw_init_local(&c, (unw_context_t *)&(((smx_ctx_sysv_t)(stack->address))->uc));
+ 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_strbuff_t get_local_variables_values(stack_region_t stack, void *heap){
+
+ unw_cursor_t c;
+ int ret;
+ char *stack_name;
+
+ char buf[512], frame_name[256];
+
+ ret = unw_init_local(&c, (unw_context_t *)&(((smx_ctx_sysv_t)(stack->address))->uc));
+ if(ret < 0){
+ XBT_INFO("unw_init_local failed");
+ xbt_abort();
+ }
+
+ stack_name = strdup(((smx_process_t)((smx_ctx_sysv_t)(stack->address))->super.data)->name);
+
+ unw_word_t ip, sp, off;
+ dw_frame_t frame;
+
+ xbt_dynar_t compose = xbt_dynar_new(sizeof(variable_value_t), NULL);
+
+ xbt_strbuff_t variables = xbt_strbuff_new();
+ xbt_dict_cursor_t dict_cursor;
+ char *variable_name;
+ dw_local_variable_t current_variable;
+ unsigned int cursor = 0, cursor2 = 0;
+ dw_location_entry_t entry = NULL;
+ dw_location_t location_entry = NULL;
+ unw_word_t res;
+ int frame_found = 0;
+ void *frame_pointer_address = NULL;
+ long true_ip;
+
+ while(ret >= 0){
+
+ unw_get_reg(&c, UNW_REG_IP, &ip);
+ unw_get_reg(&c, UNW_REG_SP, &sp);
+
+ buf[0] = '\0';
+ if (unw_get_proc_name (&c, frame_name, sizeof (frame_name), &off) == 0){
+ if (off)
+ snprintf (buf, sizeof (buf), "<%s+0x%lx>", frame_name, (long) off);
+ else
+ snprintf (buf, sizeof (buf), "<%s>", frame_name);
+
+ }
+
+ xbt_strbuff_append(variables, bprintf("ip=%-32s\n", buf));
+
+ frame = xbt_dict_get_or_null(mc_local_variables, frame_name);
+
+ if(frame == NULL){
+ ret = unw_step(&c);
+ continue;
+ }
+
+ true_ip = (long)frame->low_pc + (long)off;
+
+ /* Get frame pointer */
+ switch(frame->frame_base->type){
+ case e_dw_loclist:
+ while((cursor < xbt_dynar_length(frame->frame_base->location.loclist)) && frame_found == 0){
+ 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:
+ xbt_dynar_reset(compose);
+ cursor2 = 0;
+ while(cursor2 < xbt_dynar_length(entry->location->location.compose)){
+ location_entry = xbt_dynar_get_as(entry->location->location.compose, cursor2, dw_location_t);
+ switch(location_entry->type){
+ case e_dw_register:
+ unw_get_reg(&c, location_entry->location.reg, &res);
+ add_value(&compose, "address", (long)res);
+ break;
+ case e_dw_bregister_op:
+ unw_get_reg(&c, location_entry->location.breg_op.reg, &res);
+ add_value(&compose, "address", (long)res + location_entry->location.breg_op.offset);
+ break;
+ default:
+ xbt_dynar_reset(compose);
+ break;
+ }
+ cursor2++;
+ }
+
+ if(xbt_dynar_length(compose) > 0){
+ frame_pointer_address = xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->value.address ;
+ }
+ break;
+ default :
+ frame_pointer_address = NULL;
+ break;
+ }
+ }
+ cursor++;
+ }
+ break;
+ default :
+ frame_pointer_address = NULL;
+ break;
+ }
+
+ frame_found = 0;
+ cursor = 0;
+
+ //XBT_INFO("Frame %s", frame->name);
+
+ xbt_dict_foreach(frame->variables, dict_cursor, variable_name, current_variable){
+ if(current_variable->location != NULL){
+ switch(current_variable->location->type){
+ case e_dw_compose:
+ xbt_dynar_reset(compose);
+ cursor = 0;
+ while(cursor < xbt_dynar_length(current_variable->location->location.compose)){
+ location_entry = xbt_dynar_get_as(current_variable->location->location.compose, cursor, dw_location_t);
+ switch(location_entry->type){
+ case e_dw_register:
+ unw_get_reg(&c, location_entry->location.reg, &res);
+ add_value(&compose, "value", (long)res);
+ break;
+ case e_dw_bregister_op:
+ unw_get_reg(&c, location_entry->location.breg_op.reg, &res);
+ add_value(&compose, "address", (long)res + location_entry->location.breg_op.offset);
+ break;
+ case e_dw_fbregister_op:
+ if(frame_pointer_address != NULL)
+ add_value(&compose, "address", (long)((char *)frame_pointer_address + location_entry->location.fbreg_op));
+ break;
+ default:
+ xbt_dynar_reset(compose);
+ break;
+ }
+ cursor++;
+ }
+
+ if(xbt_dynar_length(compose) > 0){
+ if(strcmp(xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->type, "value") == 0){
+ //XBT_INFO("Variable : %s - value : %lx", current_variable->name, xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->value.res);
+ xbt_strbuff_append(variables, bprintf("%s=%lx\n", current_variable->name, xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->value.res));
+ }else{
+ if(*((void**)xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1,variable_value_t)->value.address) == NULL){
+ //XBT_INFO("Variable : %s - address : NULL", current_variable->name);
+ xbt_strbuff_append(variables, bprintf("%s=NULL\n", current_variable->name));
+ }else if(((long)*((void**)xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1,variable_value_t)->value.address) > 0xffffffff) || ((long)*((void**)xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1,variable_value_t)->value.address) < (long)start_text_binary)){
+ //XBT_INFO("Variable : %s - value : %d", current_variable->name, (int)(long long int)*((void**)xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->value.address));
+ xbt_strbuff_append(variables, bprintf("%s=%d\n", current_variable->name, (int)(long long int)*((void**)xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->value.address)));
+ }else{
+ //XBT_INFO("Variable : %s - address : %p", current_variable->name, *((void**)xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->value.address));
+ xbt_strbuff_append(variables, bprintf("%s=%p\n", current_variable->name, *((void**)xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1, variable_value_t)->value.address)));
+ }
+ }
+ }else{
+ //XBT_INFO("Variable %s undefined", current_variable->name);
+ xbt_strbuff_append(variables, bprintf("%s=undefined\n", current_variable->name));
+ }
+ break;
+ default :
+ break;
+ }
+ }else{
+ //XBT_INFO("Variable : %s, no location", current_variable->name);
+ xbt_strbuff_append(variables, bprintf("%s=undefined\n", current_variable->name));
+ }
+ }
+
+ ret = unw_step(&c);
+
+ //XBT_INFO(" ");
+
+ }
+
+ free(stack_name);
+
+ return variables;
+
+}
+
+static void print_local_variables_values(xbt_dynar_t all_variables){
+
+ unsigned cursor = 0;
+ mc_snapshot_stack_t stack;
+
+ xbt_dynar_foreach(all_variables, cursor, stack){
+ XBT_INFO("%s", stack->local_variables->data);
+ }
+}
+
