-/* Copyright (c) 2008-2013 Da SimGrid Team. All rights reserved. */
+/* Copyright (c) 2008-2013. 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
+#include <string.h>
+#include <link.h>
#include "mc_private.h"
#include "xbt/module.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");
-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;
+
+static void MC_find_object_address(memory_map_t maps, mc_object_info_t result);
/************************************ Free functions **************************************/
/*****************************************************************************************/
static void MC_snapshot_stack_free(mc_snapshot_stack_t s){
if(s){
- xbt_free(s->local_variables->data);
- xbt_free(s->local_variables);
+ xbt_dynar_free(&(s->local_variables));
xbt_free(s);
}
}
local_variable_free((local_variable_t) * (void **) v);
}
+static void MC_region_destroy(mc_mem_region_t reg)
+{
+ 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));
+ xbt_free(snapshot);
+}
+
/******************************* Snapshot regions ********************************/
/*********************************************************************************/
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->data);
- xbt_free(reg);
-}
-
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(type, start_addr, size);
}
tok = strtok(lfields[0], "-");
start_addr1 = (void *)strtoul(tok, NULL, 16);
- if(lfields[1][1] == 'w' && lfields[5] == NULL){
+ if(lfields[1][1] == 'w'){
if(start_addr1 == std_heap){ /* Std_heap ? */
tok = strtok(NULL, "-");
end_addr = (void *)strtoul(tok, NULL, 16);
}
+/** @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 = MC_get_memory_map();
+ maestro_stack_start = NULL;
+ maestro_stack_end = NULL;
+ libsimgrid_path = NULL;
+
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)){
+ 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;
- 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;
+ } 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);
- }else if (!memcmp(basename(maps->regions[i].pathname), basename(xbt_binary_name), strlen(basename(xbt_binary_name)))){
- start_text_binary = reg.start_addr;
- }
- }
}
i++;
}
-
- MC_free_memory_map(maps);
-
-}
-
-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) {
-
- 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], libsimgrid_path, strlen(libsimgrid_path)) == 0)
- continue;
-
- for (i = 1; i < 7 && lfields[i - 1] != NULL; i++) {
- lfields[i] = strtok(NULL, " ");
- }
-
- 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_assert(maestro_stack_start, "maestro_stack_start");
+ xbt_assert(maestro_stack_end, "maestro_stack_end");
+ xbt_assert(libsimgrid_path, "libsimgrid_path&");
- xbt_free(command);
- xbt_free(line);
- pclose(fp);
+ MC_free_memory_map(maps);
}
-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();
- }
-
- 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, " ");
+static void MC_post_process_types(mc_object_info_t info) {
+ // Nothing here
+}
- if(lfields[0] == NULL)
- continue;
+/** \brief Finds informations about a given shared object/executable */
+mc_object_info_t MC_find_object_info(memory_map_t maps, char* name) {
+ mc_object_info_t result = MC_new_object_info();
+ result->file_name = xbt_strdup(name);
+ MC_find_object_address(maps, result);
+ MC_dwarf_get_variables(result);
+ MC_post_process_types(result);
+ return result;
+}
- if(strcmp(lfields[0], "Sections:") == 0 || strcmp(lfields[0], "Idx") == 0 || strncmp(lfields[0], basename(xbt_binary_name), strlen(xbt_binary_name)) == 0)
- continue;
+/** \brief Fills the position of the .bss and .data sections. */
+static void MC_find_object_address(memory_map_t maps, mc_object_info_t result) {
- for (i = 1; i < 7 && lfields[i - 1] != NULL; i++) {
- lfields[i] = strtok(NULL, " ");
+ 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 (maps->regions[i].pathname == NULL || strcmp(basename(maps->regions[i].pathname), name)) {
+ // Nothing to do
}
-
- 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++;
- }
+ 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;
+ } 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++;
}
- xbt_free(command);
- xbt_free(line);
- pclose(fp);
-
+ xbt_assert(result->file_name);
+ xbt_assert(result->start_rw);
+ xbt_assert(result->start_exec);
}
/************************************* Take Snapshot ************************************/
}
+
+
static xbt_dynar_t MC_get_local_variables_values(void *stack_context){
unw_cursor_t c;
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;
+ int region_type;
void *frame_pointer_address = NULL;
- long true_ip, value;
- int stop;
+ long true_ip;
+ int stop = 0;
xbt_dynar_t variables = xbt_dynar_new(sizeof(local_variable_t), local_variable_free_voidp);
if(!strcmp(frame_name, "smx_ctx_sysv_wrapper")) /* Stop before context switch with maestro */
stop = 1;
- if((long)ip > (long)start_text_libsimgrid)
- frame = xbt_dict_get_or_null(mc_local_variables_libsimgrid, frame_name);
+ if((long)ip > (long) mc_libsimgrid_info->start_exec)
+ frame = xbt_dict_get_or_null(mc_libsimgrid_info->local_variables, frame_name);
else
- frame = xbt_dict_get_or_null(mc_local_variables_binary, frame_name);
+ frame = xbt_dict_get_or_null(mc_binary_info->local_variables, frame_name);
if(frame == NULL){
ret = unw_step(&c);
}
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;
- }
+ frame_pointer_address = mc_find_frame_base(true_ip, frame, &c);
- frame_found = 0;
cursor = 0;
xbt_dynar_foreach(frame->variables, cursor, current_variable){
- if((long)ip > (long)start_text_libsimgrid)
+ if((long)ip > (long)mc_libsimgrid_info->start_exec)
region_type = 1;
else
region_type = 2;
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;
- }
+ new_var->address = (void*) MC_dwarf_resolve_location(&c, current_variable->address.location, frame_pointer_address);
}
xbt_dynar_push(variables, &new_var);
}
-mc_snapshot_t MC_take_snapshot(){
-
- int raw_mem = (mmalloc_get_current_heap() == raw_heap);
-
- MC_SET_RAW_MEM;
+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);
+ if(MC_USE_SNAPSHOT_HASH) {
+ snapshot->hash = mc_hash_processes_state(num_state);
+ } else {
+ snapshot->hash = 0;
+ }
/* Save the std heap and the writable mapped pages of libsimgrid and binary */
MC_get_memory_regions(snapshot);
//MC_get_hash_local(snapshot->hash_local, snapshot->stacks);
}
- MC_dump_checkpoint_ignore(snapshot);
-
- MC_UNSET_RAW_MEM;
-
- if(raw_mem)
- MC_SET_RAW_MEM;
+ if(num_state > 0)
+ MC_dump_checkpoint_ignore(snapshot);
return snapshot;
}
-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));
- xbt_free(snapshot);
-}
-
mc_snapshot_t SIMIX_pre_mc_snapshot(smx_simcall_t simcall){
- return MC_take_snapshot();
+ return MC_take_snapshot(1);
}
void *MC_snapshot(void){