-/* Copyright (c) 2008-2012 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
+#define UNW_LOCAL_ONLY
+
+#include <string.h>
+#include <link.h>
#include "mc_private.h"
#include "xbt/module.h"
+#include <xbt/mmalloc.h>
+
+#include "xbt/mmalloc/mmprivate.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_plt_binary, *end_plt_binary;
char *libsimgrid_path;
-void *start_data_libsimgrid, *start_bss_libsimgrid;
-void *start_data_binary, *start_bss_binary;
-void *start_text_binary;
-void *end_raw_heap;
-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_find_object_address(memory_map_t maps, mc_object_info_t result);
-static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type, void *start_addr, size_t size);
+/************************************ Free functions **************************************/
+/*****************************************************************************************/
-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(void *stack_context, void *heap);
-static void print_local_variables_values(xbt_dynar_t all_variables);
-static void *get_stack_pointer(void *stack_context, void *heap);
+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 snapshot_stack_free(mc_snapshot_stack_t 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);
+ xbt_free(v->name);
+ xbt_free(v->type);
+ xbt_free(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)
+{
+ 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 ********************************/
+/*********************************************************************************/
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;
+ mc_mem_region_t new_reg = xbt_new(s_mc_mem_region_t, 1);
new_reg->start_addr = start_addr;
new_reg->size = size;
- new_reg->data = xbt_malloc0(size);
+ new_reg->data = xbt_malloc(size);
memcpy(new_reg->data, start_addr, size);
- XBT_DEBUG("New region : type : %d, data : %p, size : %zu", type, new_reg->data, size);
+ XBT_DEBUG("New region : type : %d, data : %p (real addr %p), size : %zu", type, new_reg->data, start_addr, size);
return new_reg;
}
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);
- 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++;
+ snapshot->regions[type] = new_reg;
return;
}
-/* void MC_take_snapshot(mc_snapshot_t snapshot) */
-/* { */
-/* 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); */
-/* } */
-/* i++; */
-/* } 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++; */
-/* reg = maps->regions[i]; */
-/* while(reg.pathname == NULL && (reg.prot & PROT_WRITE) && i < maps->mapsize){ */
-/* MC_snapshot_add_region(snapshot, 1, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr); */
-/* i++; */
-/* reg = maps->regions[i]; */
-/* } */
-/* }else{ */
-/* i++; */
-/* } */
-/* } */
-/* }else{ */
-/* i++; */
-/* } */
-/* } */
-
-/* free_memory_map(maps); */
-/* } */
+static void MC_get_memory_regions(mc_snapshot_t snapshot){
-void MC_init_memory_map_info(){
+ void* start_heap = ((xbt_mheap_t)std_heap)->base;
+ void* end_heap = ((xbt_mheap_t)std_heap)->breakval;
+ MC_snapshot_add_region(snapshot, 0, start_heap, (char*) end_heap - (char*) start_heap);
+ snapshot->heap_bytes_used = mmalloc_get_bytes_used(std_heap);
- int raw_mem_set = (mmalloc_get_current_heap() == raw_heap);
- MC_SET_RAW_MEM;
+ FILE *fp;
+ char *line = NULL;
+ ssize_t read;
+ size_t n = 0;
- unsigned int i = 0;
- s_map_region_t reg;
- memory_map_t maps = get_memory_map();
+ char *lfields[6] = {0}, *tok;
+ void *start_addr, *start_addr1, *end_addr;
+ size_t size;
+ int i;
- while (i < maps->mapsize) {
- reg = maps->regions[i];
- if ((reg.prot & PROT_WRITE)){
- if (maps->regions[i].pathname == NULL){
- if(reg.start_addr == raw_heap){
- end_raw_heap = reg.end_addr;
- }
- } else {
- 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 ((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);
- }else{
- if (!memcmp(basename(maps->regions[i].pathname), basename(xbt_binary_name), strlen(basename(xbt_binary_name)))){
- start_text_binary = reg.start_addr;
- }
- }
- }
- }
- i++;
- }
+ fp = fopen("/proc/self/maps", "r");
- free_memory_map(maps);
-
- MC_UNSET_RAW_MEM;
+ xbt_assert(fp,
+ "Cannot open /proc/self/maps to investigate the memory map of the process. Please report this bug.");
- if(raw_mem_set)
- MC_SET_RAW_MEM;
+ setbuf(fp, NULL);
-}
+ while((read = xbt_getline(&line, &n, fp)) != -1){
-mc_snapshot_t SIMIX_pre_mc_snapshot(smx_simcall_t simcall){
- return MC_take_snapshot();
-}
-
-mc_snapshot_t MC_take_snapshot()
-{
-
- int raw_mem = (mmalloc_get_current_heap() == raw_heap);
-
- MC_SET_RAW_MEM;
+ /* Wipeout the new line character */
+ line[read - 1] = '\0';
- mc_snapshot_t snapshot = xbt_new0(s_mc_snapshot_t, 1);
+ /* Tokenize the line using spaces as delimiters and store each token */
+ lfields[0] = strtok(line, " ");
- unsigned int i = 0;
- s_map_region_t reg;
- memory_map_t maps = get_memory_map();
- int nb_reg = 0;
- void *heap = NULL;
+ for (i = 1; i < 6 && lfields[i - 1] != NULL; i++) {
+ lfields[i] = strtok(NULL, " ");
+ }
- /* 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);
- heap = snapshot->regions[nb_reg]->data;
- nb_reg++;
- }else if(reg.start_addr == raw_heap){
- end_raw_heap = reg.end_addr;
- }
- i++;
- } 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);
- start_data_libsimgrid = reg.start_addr;
- nb_reg++;
- i++;
- reg = maps->regions[i];
- if(reg.pathname == NULL && (reg.prot & PROT_WRITE) && i < maps->mapsize){
- MC_snapshot_add_region(snapshot, 1, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
- reg = maps->regions[i];
- i++;
- 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++;
- 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){
- MC_snapshot_add_region(snapshot, 2, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr);
- reg = maps->regions[i];
- nb_reg++;
+ /* First get the permissions flags, need write permission */
+ if(lfields[1][1] == 'w'){
+
+ /* 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 ? */
+
+ }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;
+ }
}
- }else{
- i++;
- }
- }
- }
- }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);
- }else{
- if (!memcmp(basename(maps->regions[i].pathname), basename(xbt_binary_name), strlen(basename(xbt_binary_name)))){
- start_text_binary = reg.start_addr;
+ 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 ? */
+
+ }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);
}
}
}
- i++;
- }else{
- i++;
}
+
}
- if(_surf_mc_visited > 0 || strcmp(_surf_mc_property_file,""))
- snapshot->stacks = take_snapshot_stacks(heap);
-
- free_memory_map(maps);
-
- MC_UNSET_RAW_MEM;
+ free(line);
+ fclose(fp);
- if(raw_mem)
- MC_SET_RAW_MEM;
+}
- return snapshot;
+/** @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;
-void MC_restore_snapshot(mc_snapshot_t snapshot)
-{
- unsigned int i;
- for(i=0; i < snapshot->num_reg; i++){
- MC_region_restore(snapshot->regions[i]);
+ 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++;
}
-}
+ xbt_assert(maestro_stack_start, "maestro_stack_start");
+ xbt_assert(maestro_stack_end, "maestro_stack_end");
+ xbt_assert(libsimgrid_path, "libsimgrid_path&");
-void MC_free_snapshot(mc_snapshot_t snapshot)
-{
- unsigned int i;
- for(i=0; i < snapshot->num_reg; i++)
- MC_region_destroy(snapshot->regions[i]);
+ MC_free_memory_map(maps);
- xbt_dynar_free(&(snapshot->stacks));
- xbt_free(snapshot);
}
-
-void 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 getline */
-
- char *lfields[7];
- int i, plt_not_found = 1;
- unsigned long int size, offset;
-
- if(libsimgrid_path == NULL)
- libsimgrid_path = get_libsimgrid_path();
-
- char *command = bprintf("objdump --section-headers %s", libsimgrid_path);
-
- fp = popen(command, "r");
-
- if(fp == NULL){
- perror("popen failed");
- xbt_abort();
+/** \brief Fill/llokup the "subtype" field.
+ */
+static void MC_resolve_subtype(mc_object_info_t info, dw_type_t type) {
+
+ if(type->dw_type_id==NULL)
+ return;
+ type->subtype = xbt_dict_get_or_null(info->types, type->dw_type_id);
+ if(type->subtype==NULL)
+ return;
+ if(type->subtype->byte_size != 0)
+ return;
+ if(type->subtype->name==NULL)
+ return;
+ // Try to find a more complete description of the type:
+ // We need to fix in order to support C++.
+
+ dw_type_t subtype = xbt_dict_get_or_null(info->types_by_name, type->subtype->name);
+ if(subtype!=NULL) {
+ type->subtype = subtype;
}
- while ((read = getline(&line, &n, fp)) != -1 && plt_not_found == 1) {
+ // TODO, support "switch type" (looking up the type in another lib) when possible
+}
- if(n == 0)
- continue;
+static void MC_post_process_types(mc_object_info_t info) {
+ xbt_dict_cursor_t cursor = NULL;
+ char *origin;
+ dw_type_t type;
- /* Wipeout the new line character */
- line[read - 1] = '\0';
+ // Lookup "subtype" field:
+ xbt_dict_foreach(info->types, cursor, origin, type){
+ MC_resolve_subtype(info, type);
- lfields[0] = strtok(line, " ");
+ dw_type_t member;
+ unsigned int i = 0;
+ if(type->members!=NULL) xbt_dynar_foreach(type->members, i, member) {
+ MC_resolve_subtype(info, member);
+ }
+ }
+}
- 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], libsimgrid_path, strlen(libsimgrid_path)) == 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);
- 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;
- }
+ 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++;
}
- free(command);
- free(line);
- pclose(fp);
-
+ xbt_assert(result->file_name);
+ xbt_assert(result->start_rw);
+ xbt_assert(result->start_exec);
}
-void 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 getline */
-
- char *lfields[7];
- int i, plt_not_found = 1;
- unsigned long int size, offset;
-
- char *command = bprintf( "objdump --section-headers %s", xbt_binary_name);
+/************************************* Take Snapshot ************************************/
+/****************************************************************************************/
+
+static xbt_dynar_t MC_get_local_variables_values(xbt_dynar_t stack_frames){
+
+ unsigned cursor1 = 0;
+ mc_stack_frame_t stack_frame;
+ xbt_dynar_t variables = xbt_dynar_new(sizeof(local_variable_t), local_variable_free_voidp);
+
+ xbt_dynar_foreach(stack_frames,cursor1,stack_frame) {
+
+ unsigned cursor2 = 0;
+ dw_variable_t current_variable;
+ xbt_dynar_foreach(stack_frame->frame->variables, cursor2, current_variable){
+
+ 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->frame = xbt_strdup(stack_frame->frame_name);
+ new_var->ip = stack_frame->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!=NULL) {
+ new_var->address = current_variable->address;
+ } else */
+ if(current_variable->location != NULL){
+ new_var->address = (void*) MC_dwarf_resolve_location(
+ &(stack_frame->unw_cursor), current_variable->location, (void*)stack_frame->frame_base);
+ }
- fp = popen(command, "r");
+ xbt_dynar_push(variables, &new_var);
- if(fp == NULL){
- perror("popen failed");
- xbt_abort();
+ }
}
- while ((read = getline(&line, &n, fp)) != -1 && plt_not_found == 1) {
+ return variables;
- if(n == 0)
- continue;
+}
- /* Wipeout the new line character */
- line[read - 1] = '\0';
+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);
+ }
+}
- lfields[0] = strtok(line, " ");
+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);
- if(lfields[0] == NULL)
- continue;
+ unw_cursor_t c;
- if(strcmp(lfields[0], "Sections:") == 0 || strcmp(lfields[0], "Idx") == 0 || strncmp(lfields[0], basename(xbt_binary_name), strlen(xbt_binary_name)) == 0)
- continue;
+ char frame_name[256];
- for (i = 1; i < 7 && lfields[i - 1] != NULL; i++) {
- lfields[i] = strtok(NULL, " ");
+ int ret;
+ for(ret = unw_init_local(&c, (unw_context_t *)stack_context); ret >= 0; ret = unw_step(&c)){
+ mc_stack_frame_t stack_frame = xbt_new(s_mc_stack_frame_t, 1);
+ xbt_dynar_push(result, &stack_frame);
+
+ stack_frame->unw_cursor = c;
+
+ unw_get_reg(&c, UNW_REG_IP, &stack_frame->ip);
+ unw_get_reg(&c, UNW_REG_SP, &stack_frame->sp);
+
+ unw_word_t off;
+ unw_get_proc_name(&c, frame_name, sizeof (frame_name), &off);
+ stack_frame->frame_name = xbt_strdup(frame_name);
+
+ dw_frame_t frame;
+ if((long)stack_frame->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_binary_info->local_variables, frame_name);
+ stack_frame->frame = frame;
+
+ if(frame != NULL){
+ unw_word_t normalized_ip = (unw_word_t)frame->low_pc + (unw_word_t)off;
+ stack_frame->frame_base = (unw_word_t)mc_find_frame_base(normalized_ip, frame, &c);
+ } else {
+ stack_frame->frame_base = 0;
}
- if(i>=6){
- if(strcmp(lfields[1], ".plt") == 0){
- size = strtoul(lfields[2], NULL, 16);
- 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;
- }
- }
-
-
+ /* Stop before context switch with maestro */
+ if(!strcmp(frame_name, "smx_ctx_sysv_wrapper"))
+ break;
}
- free(command);
- free(line);
- pclose(fp);
-
-}
-
-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;
+ if(xbt_dynar_length(result) == 0){
+ XBT_INFO("unw_init_local failed");
+ xbt_abort();
}
- xbt_dynar_push(*list, &value);
-}
-static xbt_dynar_t take_snapshot_stacks(void *heap){
+ return result;
+};
- xbt_dynar_t res = xbt_dynar_new(sizeof(s_mc_snapshot_stack_t), NULL);
+static xbt_dynar_t MC_take_snapshot_stacks(mc_snapshot_t *snapshot, void *heap){
- unsigned int cursor1 = 0;
+ 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, cursor1, 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 = get_local_variables_values(current_stack->context, heap);
- st->stack_pointer = get_stack_pointer(current_stack->context, heap);
+ st->stack_frames = MC_unwind_stack_frames(current_stack->context);
+ st->local_variables = MC_get_local_variables_values(st->stack_frames);
+
+ unw_word_t sp = xbt_dynar_get_as(st->stack_frames, 0, mc_stack_frame_t)->sp;
+ st->stack_pointer = ((char *)heap + (size_t)(((char *)((long)sp) - (char*)std_heap)));
+
+ st->real_address = current_stack->address;
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)));
}
return res;
}
-static void *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){
- XBT_INFO("unw_init_local failed");
- xbt_abort();
+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);
+
+ unsigned int cursor = 0;
+ mc_heap_ignore_region_t 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;
+ new_region->size = current_region->size;
+ new_region->block = current_region->block;
+ new_region->fragment = current_region->fragment;
+ xbt_dynar_push(cpy, &new_region);
}
- unw_get_reg(&c, UNW_REG_SP, &sp);
-
- return ((char *)heap + (size_t)(((char *)((long)sp) - (char*)std_heap)));
+ return cpy;
}
-static xbt_strbuff_t get_local_variables_values(void *stack_context, void *heap){
+static void MC_dump_checkpoint_ignore(mc_snapshot_t snapshot){
- unw_cursor_t c;
- int ret;
- //char *stack_name;
-
- char frame_name[256];
+ unsigned int cursor = 0;
+ mc_checkpoint_ignore_region_t region;
+ size_t offset;
- ret = unw_init_local(&c, (unw_context_t *)stack_context);
- if(ret < 0){
- XBT_INFO("unw_init_local failed");
- xbt_abort();
+ 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);
+ }
}
- //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);
+}
- unw_get_proc_name (&c, frame_name, sizeof (frame_name), &off);
- xbt_strbuff_append(variables, bprintf("ip=%s\n", frame_name));
+mc_snapshot_t MC_take_snapshot(int num_state){
- frame = xbt_dict_get_or_null(mc_local_variables, frame_name);
+ mc_snapshot_t snapshot = xbt_new0(s_mc_snapshot_t, 1);
+ snapshot->nb_processes = xbt_swag_size(simix_global->process_list);
- if(frame == NULL){
- ret = unw_step(&c);
- continue;
- }
+ /* Save the std heap and the writable mapped pages of libsimgrid and binary */
+ MC_get_memory_regions(snapshot);
- 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++;
- }
+ snapshot->to_ignore = MC_take_snapshot_ignore();
- 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;
+ if(_sg_mc_visited > 0 || strcmp(_sg_mc_property_file,"")){
+ snapshot->stacks = MC_take_snapshot_stacks(&snapshot, snapshot->regions[0]->data);
+ if(_sg_mc_hash && snapshot->stacks!=NULL) {
+ snapshot->hash = mc_hash_processes_state(num_state, snapshot->stacks);
+ } else {
+ snapshot->hash = 0;
}
-
- 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){
- //XBT_INFO("Variable : %s", current_variable->name);
- 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((long)xbt_dynar_get_as(compose, xbt_dynar_length(compose) - 1,variable_value_t)->value.address < 0 || *((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 : %zd", current_variable->name, (size_t)*((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)*((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(" ");
-
+ }
+ else {
+ snapshot->hash = 0;
}
- //free(stack_name);
+ if(num_state > 0)
+ MC_dump_checkpoint_ignore(snapshot);
- return variables;
+ return snapshot;
}
-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);
+void MC_restore_snapshot(mc_snapshot_t snapshot){
+ unsigned int i;
+ for(i=0; i < NB_REGIONS; i++){
+ MC_region_restore(snapshot->regions[i]);
}
-}
-
-static void snapshot_stack_free(mc_snapshot_stack_t s){
- if(s){
- xbt_free(s->local_variables->data);
- xbt_free(s->local_variables);
- xbt_free(s);
- }
}
-void snapshot_stack_free_voidp(void *s){
- snapshot_stack_free((mc_snapshot_stack_t) * (void **) s);
+mc_snapshot_t SIMIX_pre_mc_snapshot(smx_simcall_t simcall){
+ return MC_take_snapshot(1);
}
void *MC_snapshot(void){
-
return simcall_mc_snapshot();
-
}
