X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/6229ff3a39c8fb195846ea9eb67cf071654de597..8b730a1a7189b57671ec6ad97ae6a8f52e4b0eaf:/src/mc/mc_checkpoint.c diff --git a/src/mc/mc_checkpoint.c b/src/mc/mc_checkpoint.c index aec3a719d1..07df254929 100644 --- a/src/mc/mc_checkpoint.c +++ b/src/mc/mc_checkpoint.c @@ -1,16 +1,38 @@ +/* Copyright (c) 2008-2012 Da 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 -#include "private.h" +#include "mc_private.h" +#include "xbt/module.h" + +#include "../simix/smx_private.h" +#include 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; +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_region_destroy(mc_mem_region_t reg); static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type, 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 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 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); @@ -18,8 +40,9 @@ static mc_mem_region_t MC_region_new(int type, void *start_addr, size_t size) 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", new_reg->data, start_addr); 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; } @@ -28,37 +51,10 @@ static void MC_region_restore(mc_mem_region_t reg) { /*FIXME: check if start_addr is still mapped, if it is not, then map it before copying the data */ - if(reg->type == 3){ - memory_map_t maps = get_memory_map(); - MC_UNSET_RAW_MEM; - unsigned int i=0; - s_map_region 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 : %lu", sizeof(segment)); - memcpy((char *)segment + diff, reg->data, reg->size); - //memset(segment, '\0', diff); - //XBT_DEBUG("Memset ok"); - //memcpy(segment+diff, reg->data, reg->size); - //XBT_DEBUG("Memcpy segment ok"); - memcpy(r.start_addr, segment, sizeof(segment)); - XBT_DEBUG("Memcpy region ok"); - //memcpy(r.start_addr, reg->data, sizeof(reg->data)); - 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; + + memcpy(reg->start_addr, reg->data, reg->size); + + return; } static void MC_region_destroy(mc_mem_region_t reg) @@ -69,20 +65,6 @@ static void MC_region_destroy(mc_mem_region_t reg) static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type, void *start_addr, size_t size) { - switch(type){ - case 0 : - XBT_DEBUG("New region heap"); - break; - case 1 : - XBT_DEBUG("New region libsimgrid"); - break; - case 2 : - XBT_DEBUG("New region program"); - break; - case 3 : - XBT_DEBUG("New region stack"); - 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; @@ -93,7 +75,7 @@ static void MC_snapshot_add_region(mc_snapshot_t snapshot, int type, void *start void MC_take_snapshot(mc_snapshot_t snapshot) { unsigned int i = 0; - s_map_region reg; + s_map_region_t reg; memory_map_t maps = get_memory_map(); /* Save the std heap and the writable mapped pages of libsimgrid */ @@ -104,32 +86,37 @@ void MC_take_snapshot(mc_snapshot_t snapshot) 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++; } - i++; } - /* FIXME: free the memory map */ + free_memory_map(maps); } - -void MC_take_snapshot_liveness(mc_snapshot_t snapshot, char *prgm) +void MC_take_snapshot_liveness(mc_snapshot_t snapshot) { + unsigned int i = 0; - s_map_region reg; + s_map_region_t reg; memory_map_t maps = get_memory_map(); - - for(i=0; i< snapshot->num_reg; i++){ - MC_region_destroy(snapshot->regions[i]); - } - - snapshot->num_reg = 0; - - i = 0; + int nb_reg = 0; + void *heap = NULL; /* Save the std heap and the writable mapped pages of libsimgrid */ while (i < maps->mapsize) { @@ -138,25 +125,52 @@ void MC_take_snapshot_liveness(mc_snapshot_t snapshot, char *prgm) 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++; } + 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]; + 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]; + nb_reg++; + } } else { - if (!memcmp(basename(maps->regions[i].pathname), basename(prgm), strlen(basename(prgm)))){ - MC_snapshot_add_region(snapshot, 2, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr); - } else { - if (!memcmp(maps->regions[i].pathname, "[stack]", 7)){ - MC_snapshot_add_region(snapshot, 3, reg.start_addr, (char*)reg.end_addr - (char*)reg.start_addr); - } - } - } + 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++; + } + } + }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++; + }else{ + i++; } - i++; } - /* FIXME: free the memory map */ + snapshot->stacks = take_snapshot_stacks(heap); + + free_memory_map(maps); + } void MC_restore_snapshot(mc_snapshot_t snapshot) @@ -164,21 +178,6 @@ 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]); - switch(snapshot->regions[i]->type){ - case 0 : - XBT_DEBUG("heap restored"); - break; - case 1: - XBT_DEBUG("libsimgrid (data) restored"); - break; - case 2: - XBT_DEBUG("program (data) restored"); - break; - case 3: - XBT_DEBUG("stack restored"); - break; - } - } } @@ -193,3 +192,353 @@ void MC_free_snapshot(mc_snapshot_t 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; + + 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>=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; + } + } + + + } + + free(command); + free(line); + pclose(fp); + +} + +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); + + 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], basename(xbt_binary_name)) == 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_binary = (char *)start_text_binary + offset; + end_plt_binary = (char *)start_plt_binary + size; + plt_not_found = 0; + } + } + + + } + + 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; + } + 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->context, heap); + st->stack_pointer = get_stack_pointer(current_stack, heap); + xbt_dynar_push(res, &st); + } + + 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(); + } + + 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(void *stack_context, 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 *)stack_context); + 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); + } +} +