+++ /dev/null
-/* This file is part of the Linux Trace Toolkit viewer
- * Copyright (C) 2005 Mathieu Desnoyers
- *
- * Complete rewrite from the original version made by XangXiu Yang.
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License Version 2.1 as published by the Free Software Foundation.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include <stdio.h>
-#include <fcntl.h>
-#include <string.h>
-#include <dirent.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <errno.h>
-#include <unistd.h>
-#include <math.h>
-#include <glib.h>
-#include <glib/gprintf.h>
-#include <malloc.h>
-#include <sys/mman.h>
-#include <string.h>
-#include <ctype.h>
-#include <inttypes.h>
-
-// For realpath
-#include <limits.h>
-#include <stdlib.h>
-
-
-#include <ltt/ltt.h>
-#include "ltt-private.h"
-#include <ltt/trace.h>
-#include <ltt/event.h>
-#include <ltt/ltt-types.h>
-#include <ltt/marker.h>
-
-#define DEFAULT_N_BLOCKS 32
-
-/* from marker.c */
-extern long marker_update_fields_offsets(struct marker_info *info, const char *data);
-extern void marker_update_event_fields_offsets(GArray *fields_offsets,
- struct marker_info *info);
-
-/* Tracefile names used in this file */
-
-GQuark LTT_TRACEFILE_NAME_METADATA;
-
-#ifndef g_open
-#define g_open open
-#endif
-
-
-#define __UNUSED__ __attribute__((__unused__))
-
-#define g_info(format...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_INFO, format)
-
-#ifndef g_debug
-#define g_debug(format...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, format)
-#endif
-
-#define g_close close
-
-/* Those macros must be called from within a function where page_size is a known
- * variable */
-#define PAGE_MASK (~(page_size-1))
-#define PAGE_ALIGN(addr) (((addr)+page_size-1)&PAGE_MASK)
-
-/* set the offset of the fields belonging to the event,
- need the information of the archecture */
-//void set_fields_offsets(LttTracefile *tf, LttEventType *event_type);
-//size_t get_fields_offsets(LttTracefile *tf, LttEventType *event_type, void *data);
-
-/* map a fixed size or a block information from the file (fd) */
-static gint map_block(LttTracefile * tf, guint block_num);
-
-/* calculate nsec per cycles for current block */
-#if 0
-static guint32 calc_nsecs_per_cycle(LttTracefile * t);
-static guint64 cycles_2_ns(LttTracefile *tf, guint64 cycles);
-#endif //0
-
-/* go to the next event */
-static int ltt_seek_next_event(LttTracefile *tf);
-
-static int open_tracefiles(LttTrace *trace, gchar *root_path,
- gchar *relative_path);
-static int ltt_process_metadata_tracefile(LttTracefile *tf);
-static void ltt_tracefile_time_span_get(LttTracefile *tf,
- LttTime *start, LttTime *end);
-static void group_time_span_get(GQuark name, gpointer data, gpointer user_data);
-static gint map_block(LttTracefile * tf, guint block_num);
-static void ltt_update_event_size(LttTracefile *tf);
-static LttTrace *_ltt_trace_open(const gchar *pathname, gboolean is_live);
-static int ltt_tracefile_update(LttTracefile *tf);
-static void update_tracefile_group(GQuark name, gpointer data, gpointer user_data);
-
-/* Enable event debugging */
-static int a_event_debug = 0;
-
-void ltt_event_debug(int state)
-{
- a_event_debug = state;
-}
-
-/* trace can be NULL
- *
- * Return value : 0 success, 1 bad tracefile
- */
-static int parse_trace_header(ltt_subbuffer_header_t *header,
- LttTracefile *tf, LttTrace *t)
-{
- if (header->magic_number == LTT_MAGIC_NUMBER)
- tf->reverse_bo = 0;
- else if(header->magic_number == LTT_REV_MAGIC_NUMBER)
- tf->reverse_bo = 1;
- else /* invalid magic number, bad tracefile ! */
- return 1;
-
- if(t) {
- t->ltt_major_version = header->major_version;
- t->ltt_minor_version = header->minor_version;
- t->arch_size = header->arch_size;
- }
- tf->alignment = header->alignment;
-
- /* Get float byte order : might be different from int byte order
- * (or is set to 0 if the trace has no float (kernel trace)) */
- tf->float_word_order = 0;
-
- switch(header->major_version) {
- case 0:
- case 1:
- g_warning("Unsupported trace version : %hhu.%hhu",
- header->major_version, header->minor_version);
- return 1;
- break;
- case 2:
- switch(header->minor_version) {
- case 6:
- {
- struct ltt_subbuffer_header_2_6 *vheader = header;
- tf->buffer_header_size = ltt_subbuffer_header_size();
- tf->tscbits = 27;
- tf->eventbits = 5;
- tf->tsc_mask = ((1ULL << tf->tscbits) - 1);
- tf->tsc_mask_next_bit = (1ULL << tf->tscbits);
-
- if(t) {
- t->start_freq = ltt_get_uint64(LTT_GET_BO(tf),
- &vheader->start_freq);
- t->freq_scale = ltt_get_uint32(LTT_GET_BO(tf),
- &vheader->freq_scale);
- t->start_tsc = ltt_get_uint64(LTT_GET_BO(tf),
- &vheader->cycle_count_begin);
- t->start_monotonic = 0;
- t->start_time.tv_sec = ltt_get_uint64(LTT_GET_BO(tf),
- &vheader->start_time_sec);
- t->start_time.tv_nsec = ltt_get_uint64(LTT_GET_BO(tf),
- &vheader->start_time_usec);
- t->start_time.tv_nsec *= 1000; /* microsec to nanosec */
-
- t->start_time_from_tsc =
- ltt_time_from_uint64(tsc_to_uint64(t->freq_scale,
- t->start_freq, t->start_tsc));
- }
- }
- break;
- default:
- g_warning("Unsupported trace version : %hhu.%hhu",
- header->major_version, header->minor_version);
- return 1;
- }
- break;
- default:
- g_warning("Unsupported trace version : %hhu.%hhu",
- header->major_version, header->minor_version);
- return 1;
- }
- return 0;
-}
-
-int get_block_offset_size(LttTracefile *tf, guint block_num,
- uint64_t *offset, uint32_t *size)
-{
- uint64_t offa, offb;
-
- if (unlikely(block_num >= tf->num_blocks))
- return -1;
-
- offa = g_array_index(tf->buf_index, uint64_t, block_num);
- if (likely(block_num < tf->num_blocks - 1))
- offb = g_array_index(tf->buf_index, uint64_t, block_num + 1);
- else
- offb = tf->file_size;
- *offset = offa;
- *size = offb - offa;
- return 0;
-}
-
-static int ltt_trace_update_block_index(LttTracefile *tf, uint64_t offset,
- unsigned long firstBlock)
-{
- int i = firstBlock;
- int page_size = getpagesize();
- unsigned int header_map_size = PAGE_ALIGN(ltt_subbuffer_header_size());
-
- g_assert(tf->buf_index->len == i);
- while (offset < tf->file_size) {
- ltt_subbuffer_header_t *header;
- uint64_t *off;
- uint64_t size;
-
- /* map block header */
- header = mmap(0, header_map_size, PROT_READ,
- MAP_PRIVATE, tf->fd, (off_t)offset);
- if(header == MAP_FAILED) {
- perror("Error in allocating memory for buffer of tracefile");
- return -1;
- }
-
- /* read len, offset += len */
- size = ltt_get_uint32(LTT_GET_BO(tf), &header->sb_size);
-
- /* Only index completly writen blocks */
- if (offset + size <= tf->file_size) {
-
- tf->buf_index = g_array_set_size(tf->buf_index, i + 1);
- off = &g_array_index(tf->buf_index, uint64_t, i);
- *off = offset;
-
- /* Store current buffer end cycle as the last file timestamp */
- /* TODO ybrosseau 2010-11-04: Might want to convert it to a LttTime */
- tf->end_timestamp = ltt_get_uint64(LTT_GET_BO(tf),
- &header->cycle_count_end);
-
- ++i;
- }
- offset += size;
- /* unmap block header */
- if(munmap(header, header_map_size)) {
- g_warning("unmap size : %u\n", header_map_size);
- perror("munmap error");
- return -1;
- }
- }
- tf->num_blocks = i;
-
- return 0;
-}
-
-/* parse the new information from the file and reajust the number of blocks.
- *
- * Return value : 0 success, -1 error
- */
-int ltt_trace_continue_block_index(LttTracefile *tf)
-{
- int ret;
- uint64_t offset;
- uint32_t last_block_size;
- unsigned long i = tf->num_blocks;
- int page_size = getpagesize();
- unsigned int header_map_size = PAGE_ALIGN(ltt_subbuffer_header_size());
-
- get_block_offset_size(tf, tf->num_blocks-1, &offset, &last_block_size);
-
- ltt_subbuffer_header_t *header_tmp = mmap(0, header_map_size, PROT_READ,
- MAP_PRIVATE, tf->fd, (off_t)offset);
- if(header_tmp == MAP_FAILED) {
- perror("Error in allocating memory for buffer of tracefile");
- return -1;
- }
-
- /* read len, offset += len */
- offset += ltt_get_uint32(LTT_GET_BO(tf), &header_tmp->sb_size);
-
- ret = ltt_trace_update_block_index(tf, offset, i);
-
- return ret;
-}
-
-int ltt_trace_create_block_index(LttTracefile *tf)
-{
- int ret;
- uint64_t offset = 0;
- unsigned long i = 0;
-
- tf->buf_index = g_array_sized_new(FALSE, TRUE, sizeof(uint64_t),
- DEFAULT_N_BLOCKS);
- if(!tf->buf_index)
- return -1;
- ret = ltt_trace_update_block_index(tf, offset, i);
- return ret;
-}
-
-/*
- Read file header and initialise buffer indexes
-
- Return value : 0 for success, -1 otherwise.
-*/
-static int ltt_tracefile_init(LttTracefile *tf)
-{
- ltt_subbuffer_header_t *header;
- int page_size = getpagesize();
-
- /* Temporarily map the buffer start header to get trace information */
- /* Multiple of pages aligned head */
- tf->buffer.head = mmap(0,
- PAGE_ALIGN(ltt_subbuffer_header_size()), PROT_READ,
- MAP_PRIVATE, tf->fd, 0);
- if(tf->buffer.head == MAP_FAILED) {
- perror("Error in allocating memory for buffer of tracefile");
- goto unmap_file;
- }
- g_assert( ( (gulong)tf->buffer.head&(8-1) ) == 0); // make sure it's aligned.
-
- header = (ltt_subbuffer_header_t *)tf->buffer.head;
-
- if(parse_trace_header(header, tf, tf->trace))
- {
- g_warning("parse_trace_header error");
- goto unmap_file;
- }
-
- if(munmap(tf->buffer.head,
- PAGE_ALIGN(ltt_subbuffer_header_size())))
- {
- g_warning("unmap size : %zu\n",
- PAGE_ALIGN(ltt_subbuffer_header_size()));
- perror("munmap error");
- g_assert(0);
- }
- tf->buffer.head = NULL;
-
- /* Create fields offset table */
- tf->event.fields_offsets = g_array_sized_new(FALSE, FALSE,
- sizeof(struct LttField), 1);
- if (!tf->event.fields_offsets) {
- g_warning("Cannot create fields offset table");
- goto unmap_file;
- }
-
- /* Create block index */
- ltt_trace_create_block_index(tf);
-
- if(map_block(tf,0))
- {
- perror("Cannot map block for tracefile");
- goto unmap_file;
- }
- return 0;
- /* Error */
-unmap_file:
- if(munmap(tf->buffer.head,
- PAGE_ALIGN(ltt_subbuffer_header_size()))) {
- g_warning("unmap size : %zu\n",
- PAGE_ALIGN(ltt_subbuffer_header_size()));
- perror("munmap error");
- g_assert(0);
- }
- return -1;
-}
-
-/*****************************************************************************
- *Function name
- * ltt_tracefile_open : open a trace file, construct a LttTracefile
- *Input params
- * t : the trace containing the tracefile
- * fileName : path name of the trace file
- * tf : the tracefile structure
- *Return value
- * : 0 for success, -1 otherwise.
- ****************************************************************************/
-static gint ltt_tracefile_open(LttTrace *t, gchar * fileName, LttTracefile *tf)
-{
- struct stat lTDFStat; /* Trace data file status */
-
- //open the file
- tf->long_name = g_quark_from_string(fileName);
- tf->trace = t;
- tf->fd = open(fileName, O_RDONLY);
- tf->buf_index = NULL;
- tf->num_blocks = 0;
- if(tf->fd < 0){
- g_warning("Unable to open input data file %s\n", fileName);
- goto end;
- }
-
- // Get the file's status
- if(fstat(tf->fd, &lTDFStat) < 0){
- g_warning("Unable to get the status of the input data file %s\n", fileName);
- goto close_file;
- }
- //store the size of the file
- tf->file_size = lTDFStat.st_size;
- tf->events_lost = 0;
- tf->subbuf_corrupt = 0;
- tf->buffer.head = NULL;
- tf->event.fields_offsets = NULL;
-
- /* Is the file large enough to contain a trace */
- if(lTDFStat.st_size < (off_t)(ltt_subbuffer_header_size())){
- if (t->is_live) {
- /* It a live trace so the file can be empty at the start of the analysis */
- goto end;
- } else {
- g_print("The input data file %s does not contain a trace\n", fileName);
- goto close_file;
- }
- }
-
- if(ltt_tracefile_init(tf) < 0) {
- goto close_file;
- }
-
- return 0;
-
- /* Error */
-close_file:
- close(tf->fd);
-end:
- if (tf->buf_index)
- g_array_free(tf->buf_index, TRUE);
- return -1;
-}
-
-/*****************************************************************************
- *Function name
- * ltt_tracefile_close: close a trace file,
- *Input params
- * t : tracefile which will be closed
- ****************************************************************************/
-
-static void ltt_tracefile_close(LttTracefile *t)
-{
- int page_size = getpagesize();
-
- if(t->buffer.head != NULL)
- if(munmap(t->buffer.head, PAGE_ALIGN(t->buffer.size))) {
- g_warning("unmap size : %u\n",
- PAGE_ALIGN(t->buffer.size));
- perror("munmap error");
- g_assert(0);
- }
-
- close(t->fd);
- if (t->buf_index)
- g_array_free(t->buf_index, TRUE);
- if (t->event.fields_offsets) {
- g_array_free(t->event.fields_offsets, TRUE);
- }
-}
-
-/****************************************************************************
- * get_absolute_pathname
- *
- * return the unique pathname in the system
- *
- * MD : Fixed this function so it uses realpath, dealing well with
- * forgotten cases (.. were not used correctly before).
- *
- ****************************************************************************/
-void get_absolute_pathname(const gchar *pathname, gchar * abs_pathname)
-{
- abs_pathname[0] = '\0';
-
- if (realpath(pathname, abs_pathname) != NULL)
- return;
- else
- {
- /* error, return the original path unmodified */
- strcpy(abs_pathname, pathname);
- return;
- }
- return;
-}
-
-/* Search for something like : .*_.*
- *
- * The left side is the name, the right side is the number.
- * Exclude leading /.
- * Exclude flight- prefix.
- */
-
-static int get_tracefile_name_number(gchar *raw_name,
- GQuark *name,
- guint *num,
- gulong *tid,
- gulong *pgid,
- guint64 *creation)
-{
- guint raw_name_len = strlen(raw_name);
- gchar char_name[PATH_MAX];
- int i;
- int underscore_pos;
- long int cpu_num;
- gchar *endptr;
- gchar *tmpptr;
-
- /* skip leading / */
- for(i = 0; i < raw_name_len-1;i++) {
- if(raw_name[i] != '/')
- break;
- }
- raw_name = &raw_name[i];
- raw_name_len = strlen(raw_name);
-
- for(i=raw_name_len-1;i>=0;i--) {
- if(raw_name[i] == '_') break;
- }
- if(i==-1) { /* Either not found or name length is 0 */
- /* This is a userspace tracefile */
- strncpy(char_name, raw_name, raw_name_len);
- char_name[raw_name_len] = '\0';
- *name = g_quark_from_string(char_name);
- *num = 0; /* unknown cpu */
- for(i=0;i<raw_name_len;i++) {
- if(raw_name[i] == '/') {
- break;
- }
- }
- i++;
- for(;i<raw_name_len;i++) {
- if(raw_name[i] == '/') {
- break;
- }
- }
- i++;
- for(;i<raw_name_len;i++) {
- if(raw_name[i] == '-') {
- break;
- }
- }
- if(i == raw_name_len) return -1;
- i++;
- tmpptr = &raw_name[i];
- for(;i<raw_name_len;i++) {
- if(raw_name[i] == '.') {
- raw_name[i] = ' ';
- break;
- }
- }
- *tid = strtoul(tmpptr, &endptr, 10);
- if(endptr == tmpptr)
- return -1; /* No digit */
- if(*tid == ULONG_MAX)
- return -1; /* underflow / overflow */
- i++;
- tmpptr = &raw_name[i];
- for(;i<raw_name_len;i++) {
- if(raw_name[i] == '.') {
- raw_name[i] = ' ';
- break;
- }
- }
- *pgid = strtoul(tmpptr, &endptr, 10);
- if(endptr == tmpptr)
- return -1; /* No digit */
- if(*pgid == ULONG_MAX)
- return -1; /* underflow / overflow */
- i++;
- tmpptr = &raw_name[i];
- *creation = strtoull(tmpptr, &endptr, 10);
- if(endptr == tmpptr)
- return -1; /* No digit */
- if(*creation == G_MAXUINT64)
- return -1; /* underflow / overflow */
- } else {
- underscore_pos = i;
-
- cpu_num = strtol(raw_name+underscore_pos+1, &endptr, 10);
-
- if(endptr == raw_name+underscore_pos+1)
- return -1; /* No digit */
- if(cpu_num == LONG_MIN || cpu_num == LONG_MAX)
- return -1; /* underflow / overflow */
-
- if (!strncmp(raw_name, "flight-", sizeof("flight-") - 1)) {
- raw_name += sizeof("flight-") - 1;
- underscore_pos -= sizeof("flight-") - 1;
- }
- strncpy(char_name, raw_name, underscore_pos);
- char_name[underscore_pos] = '\0';
- *name = g_quark_from_string(char_name);
- *num = cpu_num;
- }
-
-
- return 0;
-}
-
-
-GData **ltt_trace_get_tracefiles_groups(LttTrace *trace)
-{
- return &trace->tracefiles;
-}
-
-
-void compute_tracefile_group(GQuark key_id,
- GArray *group,
- struct compute_tracefile_group_args *args)
-{
- unsigned int i;
- LttTracefile *tf;
-
- for(i=0; i<group->len; i++) {
- tf = &g_array_index (group, LttTracefile, i);
- if(tf->cpu_online)
- args->func(tf, args->func_args);
- }
-}
-
-
-static void ltt_tracefile_group_destroy(gpointer data)
-{
- GArray *group = (GArray *)data;
- unsigned int i;
- LttTracefile *tf;
-
- if (group->len > 0)
- destroy_marker_data(g_array_index (group, LttTracefile, 0).mdata);
- for(i=0; i<group->len; i++) {
- tf = &g_array_index (group, LttTracefile, i);
- if(tf->cpu_online)
- ltt_tracefile_close(tf);
- }
- g_array_free(group, TRUE);
-}
-
-static __attribute__ ((__unused__)) gboolean ltt_tracefile_group_has_cpu_online(gpointer data)
-{
- GArray *group = (GArray *)data;
- unsigned int i;
- LttTracefile *tf;
-
- for(i=0; i<group->len; i++) {
- tf = &g_array_index (group, LttTracefile, i);
- if(tf->cpu_online)
- return 1;
- }
- return 0;
-}
-
-
-/* Open each tracefile under a specific directory. Put them in a
- * GData : permits to access them using their tracefile group pathname.
- * i.e. access control/modules tracefile group by index :
- * "control/module".
- *
- * relative path is the path relative to the trace root
- * root path is the full path
- *
- * A tracefile group is simply an array where all the per cpu tracefiles sit.
- */
-
-static int open_tracefiles(LttTrace *trace, gchar *root_path, gchar *relative_path)
-{
- DIR *dir = opendir(root_path);
- struct dirent *entry;
- struct stat stat_buf;
- int ret, i;
- struct marker_data *mdata;
-
- gchar path[PATH_MAX];
- int path_len;
- gchar *path_ptr;
-
- int rel_path_len;
- gchar rel_path[PATH_MAX];
- gchar *rel_path_ptr;
- LttTracefile tmp_tf;
-
- if(dir == NULL) {
- perror(root_path);
- return ENOENT;
- }
-
- strncpy(path, root_path, PATH_MAX-1);
- path_len = strlen(path);
- path[path_len] = '/';
- path_len++;
- path_ptr = path + path_len;
-
- strncpy(rel_path, relative_path, PATH_MAX-1);
- rel_path_len = strlen(rel_path);
- rel_path[rel_path_len] = '/';
- rel_path_len++;
- rel_path_ptr = rel_path + rel_path_len;
-
- while((entry = readdir(dir)) != NULL) {
- if(entry->d_name[0] == '.') continue;
-
- strncpy(path_ptr, entry->d_name, PATH_MAX - path_len);
- strncpy(rel_path_ptr, entry->d_name, PATH_MAX - rel_path_len);
-
- ret = stat(path, &stat_buf);
- if(ret == -1) {
- perror(path);
- continue;
- }
-
- g_debug("Tracefile file or directory : %s\n", path);
-
- // if(strcmp(rel_path, "/eventdefs") == 0) continue;
-
- if(S_ISDIR(stat_buf.st_mode)) {
-
- g_debug("Entering subdirectory...\n");
- ret = open_tracefiles(trace, path, rel_path);
- if(ret < 0) continue;
- } else if(S_ISREG(stat_buf.st_mode)) {
- GQuark name;
- guint num;
- gulong tid, pgid;
- guint64 creation;
- GArray *group;
- num = 0;
- tid = pgid = 0;
- creation = 0;
- if(get_tracefile_name_number(rel_path, &name, &num, &tid, &pgid, &creation))
- continue; /* invalid name */
-
- g_debug("Opening file.\n");
- if(ltt_tracefile_open(trace, path, &tmp_tf)) {
- /* Only consider the error for non live trace */
- if (!trace->is_live) {
-
- g_info("Error opening tracefile %s", path);
- continue; /* error opening the tracefile : bad magic number ? */
- }
- }
-
- g_debug("Tracefile name is %s and number is %u",
- g_quark_to_string(name), num);
-
- mdata = NULL;
- tmp_tf.cpu_online = 1;
- tmp_tf.cpu_num = num;
- tmp_tf.name = name;
- tmp_tf.tid = tid;
- tmp_tf.pgid = pgid;
- tmp_tf.creation = creation;
- group = g_datalist_id_get_data(&trace->tracefiles, name);
- if(group == NULL) {
- /* Elements are automatically cleared when the array is allocated.
- * It makes the cpu_online variable set to 0 : cpu offline, by default.
- */
- group = g_array_sized_new (FALSE, TRUE, sizeof(LttTracefile), 10);
- g_datalist_id_set_data_full(&trace->tracefiles, name,
- group, ltt_tracefile_group_destroy);
- mdata = allocate_marker_data();
- if (!mdata)
- g_error("Error in allocating marker data");
- }
-
- /* Add the per cpu tracefile to the named group */
- unsigned int old_len = group->len;
- if(num+1 > old_len)
- group = g_array_set_size(group, num+1);
-
- g_assert(group->len > 0);
- if (!mdata)
- mdata = g_array_index (group, LttTracefile, 0).mdata;
-
- g_array_index (group, LttTracefile, num) = tmp_tf;
- g_array_index (group, LttTracefile, num).event.tracefile =
- &g_array_index (group, LttTracefile, num);
- for (i = 0; i < group->len; i++)
- g_array_index (group, LttTracefile, i).mdata = mdata;
- }
- }
-
- closedir(dir);
-
- return 0;
-}
-
-
-/* Presumes the tracefile is already seeked at the beginning. It makes sense,
- * because it must be done just after the opening */
-static int ltt_process_metadata_tracefile(LttTracefile *tf)
-{
- int err;
-
- while(1) {
- err = ltt_tracefile_read_seek(tf);
- if(err == EPERM) goto seek_error;
- else if(err == ERANGE) break; /* End of tracefile */
-
- err = ltt_tracefile_read_update_event(tf);
- if(err) goto update_error;
-
- /* The rules are :
- * It contains only core events :
- * 0 : set_marker_id
- * 1 : set_marker_format
- */
- if(tf->event.event_id >= MARKER_CORE_IDS) {
- /* Should only contain core events */
- g_warning("Error in processing metadata file %s, "
- "should not contain event id %u.", g_quark_to_string(tf->name),
- tf->event.event_id);
- err = EPERM;
- goto event_id_error;
- } else {
- char *pos;
- const char *channel_name, *marker_name, *format;
- uint16_t id;
- guint8 int_size, long_size, pointer_size, size_t_size, alignment;
-
- switch((enum marker_id)tf->event.event_id) {
- case MARKER_ID_SET_MARKER_ID:
- channel_name = pos = tf->event.data;
- pos += strlen(channel_name) + 1;
- marker_name = pos;
- g_debug("Doing MARKER_ID_SET_MARKER_ID of marker %s.%s",
- channel_name, marker_name);
- pos += strlen(marker_name) + 1;
- pos += ltt_align((size_t)pos, sizeof(guint16), tf->alignment);
- id = ltt_get_uint16(LTT_GET_BO(tf), pos);
- g_debug("In MARKER_ID_SET_MARKER_ID of marker %s.%s id %hu",
- channel_name, marker_name, id);
- pos += sizeof(guint16);
- int_size = *(guint8*)pos;
- pos += sizeof(guint8);
- long_size = *(guint8*)pos;
- pos += sizeof(guint8);
- pointer_size = *(guint8*)pos;
- pos += sizeof(guint8);
- size_t_size = *(guint8*)pos;
- pos += sizeof(guint8);
- alignment = *(guint8*)pos;
- pos += sizeof(guint8);
- marker_id_event(tf->trace,
- g_quark_from_string(channel_name),
- g_quark_from_string(marker_name),
- id, int_size, long_size,
- pointer_size, size_t_size, alignment);
- break;
- case MARKER_ID_SET_MARKER_FORMAT:
- channel_name = pos = tf->event.data;
- pos += strlen(channel_name) + 1;
- marker_name = pos;
- g_debug("Doing MARKER_ID_SET_MARKER_FORMAT of marker %s.%s",
- channel_name, marker_name);
- pos += strlen(marker_name) + 1;
- format = pos;
- pos += strlen(format) + 1;
- marker_format_event(tf->trace,
- g_quark_from_string(channel_name),
- g_quark_from_string(marker_name),
- format);
- /* get information from dictionary TODO */
- break;
- default:
- g_warning("Error in processing metadata file %s, "
- "unknown event id %hhu.",
- g_quark_to_string(tf->name),
- tf->event.event_id);
- err = EPERM;
- goto event_id_error;
- }
- }
- }
- return 0;
-
- /* Error handling */
-event_id_error:
-update_error:
-seek_error:
- g_warning("An error occured in metadata tracefile parsing");
- return err;
-}
-
-
-LttTrace *ltt_trace_open(const gchar *pathname)
-{
- return _ltt_trace_open(pathname, FALSE);
-}
-
-LttTrace *ltt_trace_open_live(const gchar *pathname)
-{
- return _ltt_trace_open(pathname, TRUE);
-}
-
-/*
- * Open a trace and return its LttTrace handle.
- *
- * pathname must be the directory of the trace
- */
-
-static LttTrace *_ltt_trace_open(const gchar *pathname, gboolean is_live)
-{
- gchar abs_path[PATH_MAX];
- LttTrace * t;
- LttTracefile *tf;
- GArray *group;
- unsigned int i;
- int ret;
- ltt_subbuffer_header_t *header;
- DIR *dir;
- struct dirent *entry;
- struct stat stat_buf;
- gchar path[PATH_MAX];
-
- t = g_new(LttTrace, 1);
- if(!t) goto alloc_error;
-
- get_absolute_pathname(pathname, abs_path);
- t->pathname = g_quark_from_string(abs_path);
-
- g_datalist_init(&t->tracefiles);
-
- /* Test to see if it looks like a trace */
- dir = opendir(abs_path);
- if(dir == NULL) {
- perror(abs_path);
- goto open_error;
- }
- while((entry = readdir(dir)) != NULL) {
- strcpy(path, abs_path);
- strcat(path, "/");
- strcat(path, entry->d_name);
- ret = stat(path, &stat_buf);
- if(ret == -1) {
- perror(path);
- continue;
- }
- }
- closedir(dir);
-
- t->is_live = is_live;
- t->live_safe_timestamp = ltt_time_zero;
-
- /* Open all the tracefiles */
- t->start_freq= 0;
- if(open_tracefiles(t, abs_path, "")) {
- g_warning("Error opening tracefile %s", abs_path);
- goto find_error;
- }
-
- /* Parse each trace metadata_N files : get runtime fac. info */
- group = g_datalist_id_get_data(&t->tracefiles, LTT_TRACEFILE_NAME_METADATA);
- if(group == NULL) {
- g_warning("Trace %s has no metadata tracefile", abs_path);
- goto find_error;
- }
-
- /*
- * Get the trace information for the first valid metadata tracefile.
- * In live trace mode, the metadata_0 might be empty
- * Getting a correct trace start_time and start_tsc is insured by the fact
- * that no subbuffers are supposed to be lost in the metadata channel.
- * Therefore, the first subbuffer contains the start_tsc timestamp in its
- * buffer header.
- */
- g_assert(group->len > 0);
- header = NULL;
- for(i=0; i<group->len; i++) {
- tf = &g_array_index (group, LttTracefile, i);
- header = (ltt_subbuffer_header_t *)tf->buffer.head;
- if (header) {
- break;
- }
- }
- if (header == NULL) {
- g_warning("Trace %s has not one valid metadata tracefile", abs_path);
- goto find_error;
- }
-
- ret = parse_trace_header(header, tf, t);
- g_assert(!ret);
-
- t->num_cpu = group->len;
- t->drift = 1.;
- t->offset = 0.;
-
- //ret = allocate_marker_data(t);
- //if (ret)
- // g_error("Error in allocating marker data");
-
- for(i=0; i<group->len; i++) {
- tf = &g_array_index (group, LttTracefile, i);
- if (tf->cpu_online && tf->buffer.head )
- if(ltt_process_metadata_tracefile(tf))
- goto find_error;
- // goto metadata_error;
- }
-
- return t;
-
- /* Error handling */
-//metadata_error:
-// destroy_marker_data(t);
-find_error:
- g_datalist_clear(&t->tracefiles);
-open_error:
- g_free(t);
-alloc_error:
- return NULL;
-
-}
-
-
-/*****************************************************************************
- Update the informations concerning the tracefile
-
- Must be called periodically to update trace file and file size
- information.
-
-Input params
- tf : the tracefile
-Return value
- : Number of tracefile with available events
- -1 on error.
- ****************************************************************************/
-int ltt_trace_update(LttTrace *trace)
-{
- int trace_updated_count = 0;
-
- /* Only update live traces */
- if(trace->is_live) {
-
- /* Iterate on all tracefiles */
- g_datalist_foreach(&trace->tracefiles,
- &update_tracefile_group,
- &trace_updated_count);
-
- return trace_updated_count;
- }
- return 0;
-
-}
-
-static void update_tracefile_group(GQuark name, gpointer data, gpointer user_data)
-{
- int *trace_updated_count = (int *)user_data;
- unsigned int i;
- LttTracefile *tf;
- GArray *group = (GArray *)data;
-
- g_debug("Updating tracefile group %s", g_quark_to_string(name));
- for(i=0; i<group->len; i++) {
- tf = &g_array_index (group, LttTracefile, i);
-
- /* Update safe timestamp */
- tf->trace->live_safe_timestamp =
- LTT_TIME_MAX(tf->trace->live_safe_timestamp,
- ltt_interpolate_time_from_tsc(tf,
- tf->end_timestamp));
-
- /* Update tracefile */
- int ret = ltt_tracefile_update(tf);
- if(ret < 0) {
- g_warning("LIVE: Cannot update tracefile %s",
- g_quark_to_string(ltt_tracefile_long_name(tf)));
- *trace_updated_count = -1;
- break;
- } else {
- *trace_updated_count += 1;
- }
- }
-}
-
-
-/*****************************************************************************
- *Function name
- * ltt_tracefile_update : Update the informations concerning a tracefile
- * Must be called periodically to update trace file and file size
- information.
- *Input params
- * tf : the tracefile
- *Return value
- * : 1 for success and an event is available
- 0 for success but no event available,
- * -1 on error.
- ****************************************************************************/
-static int ltt_tracefile_update(LttTracefile *tf)
-{
- struct stat lTDFStat; /* Trace data file status */
- if(fstat(tf->fd, &lTDFStat) < 0){
- perror("error in getting the tracefile informations.");
- }
-
-
- /* Process the file only on size change */
- if(tf->file_size < lTDFStat.st_size) {
- /* Update the size of the file */
- tf->file_size = lTDFStat.st_size;
- g_debug("Updating tracefile %s", g_quark_to_string(tf->long_name));
-
- if( tf->file_size >= (off_t)(ltt_subbuffer_header_size()) ) {
-
- if(tf->buf_index == NULL) {
- if(ltt_tracefile_init(tf) < 0) {
- return -1;
- }
- if(tf->name == LTT_TRACEFILE_NAME_METADATA) {
-
- LttTime start;
- start.tv_sec = 0;
- start.tv_nsec = 0;
- ltt_process_metadata_tracefile(tf);
-
- ltt_tracefile_seek_time(tf, start);
- tf->event.offset = 0;
-
- }
- }
- else
- {
- /* Retrieve the new subbuffers and index them */
- ltt_trace_continue_block_index(tf);
-
- if(tf->name == LTT_TRACEFILE_NAME_METADATA) {
- LttEventPosition *pos = ltt_event_position_new();
- ltt_tracefile_get_current_position(tf, pos);
- ltt_process_metadata_tracefile(tf);
- ltt_tracefile_seek_position(tf, pos);
- g_free(pos);
-
- }
- }
-
- return 1;
- }
- }
-
- return 0;
-
-}
-
-/* Open another, completely independant, instance of a trace.
- *
- * A read on this new instance will read the first event of the trace.
- *
- * When we copy a trace, we want all the opening actions to happen again :
- * the trace will be reopened and totally independant from the original.
- * That's why we call ltt_trace_open.
- */
-LttTrace *ltt_trace_copy(LttTrace *self)
-{
- return _ltt_trace_open(g_quark_to_string(self->pathname), self->is_live);
-}
-
-/*
- * Close a trace
- */
-
-void ltt_trace_close(LttTrace *t)
-{
- g_datalist_clear(&t->tracefiles);
- g_free(t);
-}
-
-
-/*****************************************************************************
- * Get the start time and end time of the trace
- ****************************************************************************/
-
-void ltt_tracefile_time_span_get(LttTracefile *tf,
- LttTime *start, LttTime *end)
-{
- int err;
-
-
- err = map_block(tf, 0);
- /* Only empty live traces will return ERANGE */
- if(err == ERANGE) {
- *start = ltt_time_infinite;
- *end = ltt_time_zero;
- return;
- } else if(unlikely(err)) {
- g_error("Can not map block");
- *start = ltt_time_infinite;
- } else
- *start = tf->buffer.begin.timestamp;
-
- err = map_block(tf, tf->num_blocks - 1); /* Last block */
- if(unlikely(err)) {
- g_error("Can not map block");
- *end = ltt_time_zero;
- } else
- *end = tf->buffer.end.timestamp;
-
- g_assert(end->tv_sec <= G_MAXUINT);
-}
-
-struct tracefile_time_span_get_args {
- LttTrace *t;
- LttTime *start;
- LttTime *end;
-};
-
-static void group_time_span_get(GQuark name, gpointer data, gpointer user_data)
-{
- struct tracefile_time_span_get_args *args =
- (struct tracefile_time_span_get_args*)user_data;
-
- GArray *group = (GArray *)data;
- unsigned int i;
- LttTracefile *tf;
- LttTime tmp_start;
- LttTime tmp_end;
-
- for(i=0; i<group->len; i++) {
- tf = &g_array_index (group, LttTracefile, i);
- if(tf->cpu_online) {
- ltt_tracefile_time_span_get(tf, &tmp_start, &tmp_end);
- if(ltt_time_compare(*args->start, tmp_start)>0) *args->start = tmp_start;
- if(ltt_time_compare(*args->end, tmp_end)<0) *args->end = tmp_end;
- }
- }
-}
-
-/* return the start and end time of a trace */
-
-void ltt_trace_time_span_get(LttTrace *t, LttTime *start, LttTime *end)
-{
- LttTime min_start = ltt_time_infinite;
- LttTime max_end = ltt_time_zero;
- struct tracefile_time_span_get_args args = { t, &min_start, &max_end };
-
- g_datalist_foreach(&t->tracefiles, &group_time_span_get, &args);
-
- if(start != NULL) *start = min_start;
- if(end != NULL) *end = max_end;
-
-}
-
-
-/* Seek to the first event in a tracefile that has a time equal or greater than
- * the time passed in parameter.
- *
- * If the time parameter is outside the tracefile time span, seek to the first
- * event or if after, return ERANGE.
- *
- * If the time parameter is before the first event, we have to seek specially to
- * there.
- *
- * If the time is after the end of the trace, return ERANGE.
- *
- * Do a binary search to find the right block, then a sequential search in the
- * block to find the event.
- *
- * In the special case where the time requested fits inside a block that has no
- * event corresponding to the requested time, the first event of the next block
- * will be seeked.
- *
- * IMPORTANT NOTE : // FIXME everywhere...
- *
- * You MUST NOT do a ltt_tracefile_read right after a ltt_tracefile_seek_time :
- * you will jump over an event if you do.
- *
- * Return value : 0 : no error, the tf->event can be used
- * ERANGE : time if after the last event of the trace
- * otherwise : this is an error.
- *
- * */
-
-int ltt_tracefile_seek_time(LttTracefile *tf, LttTime time)
-{
- int ret = 0;
- int err;
- unsigned int block_num, high, low;
-
- /* seek at the beginning of trace */
- err = map_block(tf, 0); /* First block */
- if(unlikely(err == ERANGE)) {
- goto range;
- } else if(unlikely(err)) {
- g_error("Can not map block");
- goto fail;
- }
-
- /* If the time is lower or equal the beginning of the trace,
- * go to the first event. */
- if(ltt_time_compare(time, tf->buffer.begin.timestamp) <= 0) {
- ret = ltt_tracefile_read(tf);
- if(ret == ERANGE) goto range;
- else if (ret) goto fail;
- goto found; /* There is either no event in the trace or the event points
- to the first event in the trace */
- }
-
- err = map_block(tf, tf->num_blocks - 1); /* Last block */
- if(unlikely(err)) {
- g_error("Can not map block");
- goto fail;
- }
-
- /* If the time is after the end of the trace, return ERANGE. */
- if(ltt_time_compare(time, tf->buffer.end.timestamp) > 0) {
- goto range;
- }
-
- /* Binary search the block */
- high = tf->num_blocks - 1;
- low = 0;
-
- while(1) {
- block_num = ((high-low) / 2) + low;
-
- err = map_block(tf, block_num);
- if(unlikely(err)) {
- g_error("Can not map block");
- goto fail;
- }
- if(high == low) {
- /* We cannot divide anymore : this is what would happen if the time
- * requested was exactly between two consecutive buffers'end and start
- * timestamps. This is also what would happend if we didn't deal with out
- * of span cases prior in this function. */
- /* The event is right in the buffer!
- * (or in the next buffer first event) */
- while(1) {
- ret = ltt_tracefile_read(tf);
- if(ret == ERANGE) goto range; /* ERANGE or EPERM */
- else if(ret) goto fail;
-
- if(ltt_time_compare(time, tf->event.event_time) <= 0)
- goto found;
- }
-
- } else if(ltt_time_compare(time, tf->buffer.begin.timestamp) < 0) {
- /*
- * Go to lower part. We don't want block_num - 1 since block_num
- * can equal low , in which case high < low.
- */
- high = block_num;
- } else if(ltt_time_compare(time, tf->buffer.end.timestamp) > 0) {
- /* go to higher part */
- low = block_num + 1;
- } else {/* The event is right in the buffer!
- (or in the next buffer first event) */
- while(1) {
- ret = ltt_tracefile_read(tf);
- if(ret == ERANGE) goto range; /* ERANGE or EPERM */
- else if(ret) goto fail;
-
- if(ltt_time_compare(time, tf->event.event_time) <= 0)
- break;
- }
- goto found;
- }
- }
-
-found:
- return 0;
-range:
- return ERANGE;
-
- /* Error handling */
-fail:
- g_error("ltt_tracefile_seek_time failed on tracefile %s",
- g_quark_to_string(tf->name));
- return EPERM;
-}
-
-
-/* Save the current tracefile position in the passed position pointer */
-int ltt_tracefile_get_current_position(const LttTracefile *tf, LttEventPosition *ep)
-{
- /* TODO ybrosseau 2011-06-07: Maybe add some error checking
- (ex: check the validity of the arguments pointer) */
- ltt_event_position(&(tf->event), ep);
- return 0;
-}
-
-
-/* Seek to a position indicated by an LttEventPosition
- */
-
-int ltt_tracefile_seek_position(LttTracefile *tf, const LttEventPosition *ep)
-{
- int err;
-
- if(ep->tracefile != tf) {
- goto fail;
- }
-
- err = map_block(tf, ep->block);
- if(unlikely(err)) {
- g_error("Can not map block");
- goto fail;
- }
-
- tf->event.offset = ep->offset;
-
- /* Put back the event real tsc */
- tf->event.tsc = ep->tsc;
- tf->buffer.tsc = ep->tsc;
-
- err = ltt_tracefile_read_update_event(tf);
- if(err) goto fail;
-
- /* deactivate this, as it does nothing for now
- err = ltt_tracefile_read_op(tf);
- if(err) goto fail;
- */
-
- return 0;
-
-fail:
- g_error("ltt_tracefile_seek_time failed on tracefile %s",
- g_quark_to_string(tf->name));
- return 1;
-}
-
-/*
- * Convert a value in "TSC scale" to a value in nanoseconds
- */
-guint64 tsc_to_uint64(guint32 freq_scale, uint64_t start_freq, guint64 tsc)
-{
- return (double) tsc * NANOSECONDS_PER_SECOND * freq_scale / start_freq;
-}
-
-/* Given a TSC value, return the LttTime (seconds,nanoseconds) it
- * corresponds to.
- */
-LttTime ltt_interpolate_time_from_tsc(LttTracefile *tf, guint64 tsc)
-{
- return ltt_time_from_uint64(tsc_to_uint64(tf->trace->freq_scale,
- tf->trace->start_freq, tf->trace->drift * tsc +
- tf->trace->offset));
-}
-
-/* Calculate the real event time based on the buffer boundaries */
-LttTime ltt_interpolate_time(LttTracefile *tf, LttEvent *event)
-{
- return ltt_interpolate_time_from_tsc(tf, tf->buffer.tsc);
-}
-
-
-/* Get the current event of the tracefile : valid until the next read */
-LttEvent *ltt_tracefile_get_event(LttTracefile *tf)
-{
- return &tf->event;
-}
-
-/*****************************************************************************
- *Function name
- * ltt_tracefile_read : Read the next event in the tracefile
- *Input params
- * t : tracefile
- *Return value
- *
- * Returns 0 if an event can be used in tf->event.
- * Returns ERANGE on end of trace. The event in tf->event still can be used
- * (if the last block was not empty).
- * Returns EPERM on error.
- *
- * This function does make the tracefile event structure point to the event
- * currently pointed to by the tf->event.
- *
- * Note : you must call a ltt_tracefile_seek to the beginning of the trace to
- * reinitialize it after an error if you want results to be coherent.
- * It would be the case if a end of trace last buffer has no event : the end
- * of trace wouldn't be returned, but an error.
- * We make the assumption there is at least one event per buffer.
- ****************************************************************************/
-
-int ltt_tracefile_read(LttTracefile *tf)
-{
- int err;
-
- err = ltt_tracefile_read_seek(tf);
- if(err) return err;
- err = ltt_tracefile_read_update_event(tf);
- if(err) return err;
-
- /* deactivate this, as it does nothing for now
- err = ltt_tracefile_read_op(tf);
- if(err) return err;
- */
-
- return 0;
-}
-
-int ltt_tracefile_read_seek(LttTracefile *tf)
-{
- int err;
-
- /* Get next buffer until we finally have an event, or end of trace */
- while(1) {
- err = ltt_seek_next_event(tf);
- if(unlikely(err == ENOPROTOOPT)) {
- return EPERM;
- }
-
- /* Are we at the end of the buffer ? */
- if(err == ERANGE) {
- if(unlikely(tf->buffer.index == tf->num_blocks-1)){ /* end of trace ? */
- return ERANGE;
- } else {
- /* get next block */
- err = map_block(tf, tf->buffer.index + 1);
- if(unlikely(err)) {
- g_error("Can not map block");
- return EPERM;
- }
- }
- } else break; /* We found an event ! */
- }
-
- return 0;
-}
-
-/* do an operation when reading a new event */
-
-/* This function does nothing for now */
-#if 0
-int ltt_tracefile_read_op(LttTracefile *tf)
-{
- LttEvent *event;
-
- event = &tf->event;
-
- /* do event specific operation */
-
- /* nothing */
-
- return 0;
-}
-#endif
-
-static void print_debug_event_header(LttEvent *ev, void *start_pos, void *end_pos)
-{
- unsigned int offset = 0;
- int i, j;
-
- g_printf("Event header (tracefile %s offset %" PRIx64 "):\n",
- g_quark_to_string(ev->tracefile->long_name),
- (uint64_t)ev->tracefile->buffer.offset +
- (long)start_pos - (long)ev->tracefile->buffer.head);
-
- while (offset < (long)end_pos - (long)start_pos) {
- g_printf("%8lx", (long)start_pos - (long)ev->tracefile->buffer.head + offset);
- g_printf(" ");
-
- for (i = 0; i < 4 ; i++) {
- for (j = 0; j < 4; j++) {
- if (offset + ((i * 4) + j) <
- (long)end_pos - (long)start_pos)
- g_printf("%02hhX",
- ((char*)start_pos)[offset + ((i * 4) + j)]);
- else
- g_printf(" ");
- g_printf(" ");
- }
- if (i < 4)
- g_printf(" ");
- }
- offset+=16;
- g_printf("\n");
- }
-}
-
-
-/* same as ltt_tracefile_read, but does not seek to the next event nor call
- * event specific operation. */
-int ltt_tracefile_read_update_event(LttTracefile *tf)
-{
- void * pos;
- LttEvent *event;
- void *pos_aligned;
- guint16 packed_evid; /* event id reader from the 5 bits in header */
-
- event = &tf->event;
- pos = tf->buffer.head + event->offset;
-
- /* Read event header */
-
- /* Align the head */
- pos += ltt_align((size_t)pos, sizeof(guint32), tf->alignment);
- pos_aligned = pos;
-
- event->timestamp = ltt_get_uint32(LTT_GET_BO(tf), pos);
- event->event_id = packed_evid = event->timestamp >> tf->tscbits;
- event->timestamp = event->timestamp & tf->tsc_mask;
- pos += sizeof(guint32);
-
- switch (packed_evid) {
- case 29: /* LTT_RFLAG_ID_SIZE_TSC */
- event->event_id = ltt_get_uint16(LTT_GET_BO(tf), pos);
- pos += sizeof(guint16);
- event->event_size = ltt_get_uint16(LTT_GET_BO(tf), pos);
- pos += sizeof(guint16);
- if (event->event_size == 0xFFFF) {
- event->event_size = ltt_get_uint32(LTT_GET_BO(tf), pos);
- pos += sizeof(guint32);
- }
- pos += ltt_align((size_t)pos, sizeof(guint64), tf->alignment);
- tf->buffer.tsc = ltt_get_uint64(LTT_GET_BO(tf), pos);
- pos += sizeof(guint64);
- break;
- case 30: /* LTT_RFLAG_ID_SIZE */
- event->event_id = ltt_get_uint16(LTT_GET_BO(tf), pos);
- pos += sizeof(guint16);
- event->event_size = ltt_get_uint16(LTT_GET_BO(tf), pos);
- pos += sizeof(guint16);
- if (event->event_size == 0xFFFF) {
- event->event_size = ltt_get_uint32(LTT_GET_BO(tf), pos);
- pos += sizeof(guint32);
- }
- break;
- case 31: /* LTT_RFLAG_ID */
- event->event_id = ltt_get_uint16(LTT_GET_BO(tf), pos);
- pos += sizeof(guint16);
- event->event_size = G_MAXUINT;
- break;
- default:
- event->event_size = G_MAXUINT;
- break;
- }
-
- if (likely(packed_evid != 29)) {
- /* No extended timestamp */
- if (event->timestamp < (tf->buffer.tsc & tf->tsc_mask))
- tf->buffer.tsc = ((tf->buffer.tsc & ~tf->tsc_mask) /* overflow */
- + tf->tsc_mask_next_bit)
- | (guint64)event->timestamp;
- else
- tf->buffer.tsc = (tf->buffer.tsc & ~tf->tsc_mask) /* no overflow */
- | (guint64)event->timestamp;
- }
- event->tsc = tf->buffer.tsc;
-
- event->event_time = ltt_interpolate_time(tf, event);
-
- if (a_event_debug)
- print_debug_event_header(event, pos_aligned, pos);
-
- event->data = pos;
-
- /*
- * Let ltt_update_event_size update event->data according to the largest
- * alignment within the payload.
- * Get the data size and update the event fields with the current
- * information. */
- ltt_update_event_size(tf);
-
- return 0;
-}
-
-
-/****************************************************************************
- *Function name
- * map_block : map a block from the file
- *Input Params
- * lttdes : ltt trace file
- * whichBlock : the block which will be read
- *return value
- * 0 : success
- * EINVAL : lseek fail
- * EIO : can not read from the file
- ****************************************************************************/
-
-static gint map_block(LttTracefile * tf, guint block_num)
-{
- int page_size = getpagesize();
- ltt_subbuffer_header_t *header;
- uint64_t offset;
- uint32_t size;
- int ret;
-
- if(tf->num_blocks == 0) {
- errno = ERANGE;
- return ERANGE;
- }
-
- g_assert(block_num < tf->num_blocks);
-
- if(tf->buffer.head != NULL) {
- if(munmap(tf->buffer.head, PAGE_ALIGN(tf->buffer.size))) {
- g_warning("unmap size : %u\n",
- PAGE_ALIGN(tf->buffer.size));
- perror("munmap error");
- g_assert(0);
- }
- }
-
- ret = get_block_offset_size(tf, block_num, &offset, &size);
- g_assert(!ret);
-
- g_debug("Map block %u, offset %llu, size %u\n", block_num,
- (unsigned long long)offset, (unsigned int)size);
-
- /* Multiple of pages aligned head */
- tf->buffer.head = mmap(0, (size_t)size, PROT_READ, MAP_PRIVATE,
- tf->fd, (off_t)offset);
-
- if(tf->buffer.head == MAP_FAILED) {
- perror("Error in allocating memory for buffer of tracefile");
- g_assert(0);
- goto map_error;
- }
- g_assert( ( (gulong)tf->buffer.head&(8-1) ) == 0); // make sure it's aligned.
-
- tf->buffer.index = block_num;
-
- header = (ltt_subbuffer_header_t *)tf->buffer.head;
-
- tf->buffer.begin.cycle_count = ltt_get_uint64(LTT_GET_BO(tf),
- &header->cycle_count_begin);
- tf->buffer.end.cycle_count = ltt_get_uint64(LTT_GET_BO(tf),
- &header->cycle_count_end);
- tf->buffer.offset = offset;
- tf->buffer.size = ltt_get_uint32(LTT_GET_BO(tf),
- &header->sb_size);
- tf->buffer.data_size = ltt_get_uint32(LTT_GET_BO(tf),
- &header->data_size);
- tf->buffer.tsc = tf->buffer.begin.cycle_count;
- tf->event.tsc = tf->buffer.tsc;
- tf->buffer.freq = tf->buffer.begin.freq;
-
- g_assert(size == tf->buffer.size);
- g_assert(tf->buffer.data_size <= tf->buffer.size);
-
- if (tf->trace->start_freq)
- {
- tf->buffer.begin.freq = tf->trace->start_freq;
- tf->buffer.begin.timestamp = ltt_interpolate_time_from_tsc(tf,
- tf->buffer.begin.cycle_count);
- tf->buffer.end.freq = tf->trace->start_freq;
- tf->buffer.end.timestamp = ltt_interpolate_time_from_tsc(tf,
- tf->buffer.end.cycle_count);
- }
-
- /* Make the current event point to the beginning of the buffer :
- * it means that the event read must get the first event. */
- tf->event.tracefile = tf;
- tf->event.block = block_num;
- tf->event.offset = 0;
-
- if (header->events_lost) {
- g_warning("%d events lost so far in tracefile %s at block %u",
- (guint)header->events_lost,
- g_quark_to_string(tf->long_name),
- block_num);
- tf->events_lost = header->events_lost;
- }
- if (header->subbuf_corrupt) {
- g_warning("%d subbuffer(s) corrupted so far in tracefile %s at block %u",
- (guint)header->subbuf_corrupt,
- g_quark_to_string(tf->long_name),
- block_num);
- tf->subbuf_corrupt = header->subbuf_corrupt;
- }
-
- return 0;
-
-map_error:
- return -errno;
-}
-
-static void print_debug_event_data(LttEvent *ev)
-{
- unsigned int offset = 0;
- int i, j;
-
- if (!max(ev->event_size, ev->data_size))
- return;
-
- g_printf("Event data (tracefile %s offset %" PRIx64 "):\n",
- g_quark_to_string(ev->tracefile->long_name),
- (uint64_t)ev->tracefile->buffer.offset
- + (long)ev->data - (long)ev->tracefile->buffer.head);
-
- while (offset < max(ev->event_size, ev->data_size)) {
- g_printf("%8lx", (long)ev->data + offset
- - (long)ev->tracefile->buffer.head);
- g_printf(" ");
-
- for (i = 0; i < 4 ; i++) {
- for (j = 0; j < 4; j++) {
- if (offset + ((i * 4) + j) < max(ev->event_size, ev->data_size))
- g_printf("%02hhX", ((char*)ev->data)[offset + ((i * 4) + j)]);
- else
- g_printf(" ");
- g_printf(" ");
- }
- if (i < 4)
- g_printf(" ");
- }
-
- g_printf(" ");
-
- for (i = 0; i < 4; i++) {
- for (j = 0; j < 4; j++) {
- if (offset + ((i * 4) + j) < max(ev->event_size, ev->data_size)) {
- if (isprint(((char*)ev->data)[offset + ((i * 4) + j)]))
- g_printf("%c", ((char*)ev->data)[offset + ((i * 4) + j)]);
- else
- g_printf(".");
- } else
- g_printf(" ");
- }
- }
- offset+=16;
- g_printf("\n");
- }
-}
-
-/* It will update the fields offsets too */
-void ltt_update_event_size(LttTracefile *tf)
-{
- off_t size = 0;
- struct marker_info *info;
-
- if (tf->name == LTT_TRACEFILE_NAME_METADATA) {
- switch((enum marker_id)tf->event.event_id) {
- case MARKER_ID_SET_MARKER_ID:
- size = strlen((char*)tf->event.data) + 1;
- g_debug("marker %s id set", (char*)tf->event.data + size);
- size += strlen((char*)tf->event.data + size) + 1;
- size += ltt_align(size, sizeof(guint16), tf->alignment);
- size += sizeof(guint16);
- size += sizeof(guint8);
- size += sizeof(guint8);
- size += sizeof(guint8);
- size += sizeof(guint8);
- size += sizeof(guint8);
- break;
- case MARKER_ID_SET_MARKER_FORMAT:
- size = strlen((char*)tf->event.data) + 1;
- g_debug("marker %s format set", (char*)tf->event.data);
- size += strlen((char*)tf->event.data + size) + 1;
- size += strlen((char*)tf->event.data + size) + 1;
- break;
- }
- }
-
- info = marker_get_info_from_id(tf->mdata, tf->event.event_id);
-
- if (tf->event.event_id >= MARKER_CORE_IDS)
- g_assert(info != NULL);
-
- /* Do not update field offsets of core markers when initially reading the
- * metadata tracefile when the infos about these markers do not exist yet.
- */
- if (likely(info && info->fields)) {
- /* alignment */
- tf->event.data += ltt_align((off_t)(unsigned long)tf->event.data,
- info->largest_align,
- info->alignment);
- /* size, dynamically computed */
- if (info->size != -1)
- size = info->size;
- else
- size = marker_update_fields_offsets(info, tf->event.data);
- /* Update per-tracefile offsets */
- marker_update_event_fields_offsets(tf->event.fields_offsets, info);
- }
-
- tf->event.data_size = size;
-
- /* Check consistency between kernel and LTTV structure sizes */
- if(tf->event.event_size == G_MAXUINT) {
- /* Event size too big to fit in the event size field */
- tf->event.event_size = tf->event.data_size;
- }
-
- if (a_event_debug)
- print_debug_event_data(&tf->event);
-
- if (tf->event.data_size != tf->event.event_size) {
- struct marker_info *info = marker_get_info_from_id(tf->mdata,
- tf->event.event_id);
- if (!info)
- g_error("Undescribed event %hhu in channel %s", tf->event.event_id,
- g_quark_to_string(tf->name));
- g_error("Kernel/LTTV event size differs for event %s: kernel %u, LTTV %u",
- g_quark_to_string(info->name),
- tf->event.event_size, tf->event.data_size);
- exit(-1);
- }
-}
-
-
-/* Take the tf current event offset and use the event id to figure out where is
- * the next event offset.
- *
- * This is an internal function not aiming at being used elsewhere : it will
- * not jump over the current block limits. Please consider using
- * ltt_tracefile_read to do this.
- *
- * Returns 0 on success
- * ERANGE if we are at the end of the buffer.
- * ENOPROTOOPT if an error occured when getting the current event size.
- */
-static int ltt_seek_next_event(LttTracefile *tf)
-{
- int ret = 0;
- void *pos;
-
- /* seek over the buffer header if we are at the buffer start */
- if(tf->event.offset == 0) {
- tf->event.offset += tf->buffer_header_size;
-
- if(tf->event.offset == tf->buffer.data_size) {
- ret = ERANGE;
- }
- goto found;
- }
-
- pos = tf->event.data;
-
- if(tf->event.data_size < 0) goto error;
-
- pos += (size_t)tf->event.data_size;
-
- tf->event.offset = pos - tf->buffer.head;
-
- if(tf->event.offset >= tf->buffer.data_size) {
- ret = ERANGE;
- goto found;
- }
- g_assert(tf->event.offset < tf->buffer.data_size);
-
-found:
- return ret;
-
-error:
- g_error("Error in ltt_seek_next_event for tracefile %s",
- g_quark_to_string(tf->name));
- return ENOPROTOOPT;
-}
-
-
-/*****************************************************************************
- *Function name
- * ltt_get_int : get an integer number
- *Input params
- * reverse_byte_order: must we reverse the byte order ?
- * size : the size of the integer
- * ptr : the data pointer
- *Return value
- * gint64 : a 64 bits integer
- ****************************************************************************/
-
-gint64 ltt_get_int(gboolean reverse_byte_order, gint size, void *data)
-{
- gint64 val;
-
- switch(size) {
- case 1: val = *((gint8*)data); break;
- case 2: val = ltt_get_int16(reverse_byte_order, data); break;
- case 4: val = ltt_get_int32(reverse_byte_order, data); break;
- case 8: val = ltt_get_int64(reverse_byte_order, data); break;
- default: val = ltt_get_int64(reverse_byte_order, data);
- g_critical("get_int : integer size %d unknown", size);
- break;
- }
-
- return val;
-}
-
-/*****************************************************************************
- *Function name
- * ltt_get_uint : get an unsigned integer number
- *Input params
- * reverse_byte_order: must we reverse the byte order ?
- * size : the size of the integer
- * ptr : the data pointer
- *Return value
- * guint64 : a 64 bits unsigned integer
- ****************************************************************************/
-
-guint64 ltt_get_uint(gboolean reverse_byte_order, gint size, void *data)
-{
- guint64 val;
-
- switch(size) {
- case 1: val = *((gint8*)data); break;
- case 2: val = ltt_get_uint16(reverse_byte_order, data); break;
- case 4: val = ltt_get_uint32(reverse_byte_order, data); break;
- case 8: val = ltt_get_uint64(reverse_byte_order, data); break;
- default: val = ltt_get_uint64(reverse_byte_order, data);
- g_critical("get_uint : unsigned integer size %d unknown",
- size);
- break;
- }
-
- return val;
-}
-
-
-/* get the node name of the system */
-
-char * ltt_trace_system_description_node_name (LttSystemDescription * s)
-{
- return s->node_name;
-}
-
-
-/* get the domain name of the system */
-
-char * ltt_trace_system_description_domain_name (LttSystemDescription * s)
-{
- return s->domain_name;
-}
-
-
-/* get the description of the system */
-
-char * ltt_trace_system_description_description (LttSystemDescription * s)
-{
- return s->description;
-}
-
-
-/* get the NTP corrected start time of the trace */
-LttTime ltt_trace_start_time(LttTrace *t)
-{
- return t->start_time;
-}
-
-/* get the monotonic start time of the trace */
-LttTime ltt_trace_start_time_monotonic(LttTrace *t)
-{
- return t->start_time_from_tsc;
-}
-
-static __attribute__ ((__unused__)) LttTracefile *ltt_tracefile_new()
-{
- LttTracefile *tf;
- tf = g_new(LttTracefile, 1);
- tf->event.tracefile = tf;
- return tf;
-}
-
-static __attribute__ ((__unused__)) void ltt_tracefile_destroy(LttTracefile *tf)
-{
- g_free(tf);
-}
-
-static __attribute__ ((__unused__)) void ltt_tracefile_copy(LttTracefile *dest, const LttTracefile *src)
-{
- *dest = *src;
-}
-
-/* Before library loading... */
-
-static __attribute__((constructor)) void init(void)
-{
- LTT_TRACEFILE_NAME_METADATA = g_quark_from_string("metadata");
-}
-
-/*****************************************************************************
- *Function name
- * ltt_tracefile_open_header : based on ltt_tracefile_open but it stops
- * when it gets the header
- *Input params
- * fileName : path to the tracefile
- * tf : the tracefile (metadata_0) where the header will be read
- *Return value
- * ltt_subbuffer_header_t : the header containing the version number
- ****************************************************************************/
-static ltt_subbuffer_header_t * ltt_tracefile_open_header(gchar *fileName, LttTracefile *tf)
-{
- struct stat lTDFStat; /* Trace data file status */
- ltt_subbuffer_header_t *header;
- int page_size = getpagesize();
-
- /* open the file */
- tf->long_name = g_quark_from_string(fileName);
- tf->fd = open(fileName, O_RDONLY);
- if(tf->fd < 0){
- g_warning("Unable to open input data file %s\n", fileName);
- goto end;
- }
-
- /* Get the file's status */
- if(fstat(tf->fd, &lTDFStat) < 0){
- g_warning("Unable to get the status of the input data file %s\n", fileName);
- goto close_file;
- }
-
- /* Is the file large enough to contain a trace */
- if(lTDFStat.st_size < (off_t)(ltt_subbuffer_header_size())) {
- g_print("The input data file %s does not contain a trace\n", fileName);
- goto close_file;
- }
-
- /* Temporarily map the buffer start header to get trace information */
- /* Multiple of pages aligned head */
- tf->buffer.head = mmap(0,PAGE_ALIGN(ltt_subbuffer_header_size()), PROT_READ, MAP_PRIVATE, tf->fd, 0);
-
- if(tf->buffer.head == MAP_FAILED) {
- perror("Error in allocating memory for buffer of tracefile");
- goto close_file;
- }
- g_assert( ( (gulong)tf->buffer.head&(8-1) ) == 0); // make sure it's aligned.
-
- header = (ltt_subbuffer_header_t *)tf->buffer.head;
-
- return header;
-
- close_file:
- close(tf->fd);
- end:
- return 0;
-}
-
-
-/*****************************************************************************
- *Function name
- * get_version : get the trace version from a metadata_0 trace file
- *Input params
- * pathname : path to the trace
- * version_number : the struct that will get the version number
- *Return value
- * int : 1 if succeed, -1 if error
- ****************************************************************************/
-int ltt_get_trace_version(const gchar *pathname, struct LttTraceVersion *version_number)
-{
- gchar abs_path[PATH_MAX];
- int ret = 0;
- DIR *dir;
- struct dirent *entry;
- struct stat stat_buf;
- gchar path[PATH_MAX];
-
- LttTracefile tmp_tf;
- LttTrace * t;
- ltt_subbuffer_header_t *header;
-
- t = g_new(LttTrace, 1);
-
- get_absolute_pathname(pathname, abs_path);
-
- /* Test to see if it looks like a trace */
- dir = opendir(abs_path);
-
- if(dir == NULL) {
- perror(abs_path);
- goto open_error;
- }
-
- while((entry = readdir(dir)) != NULL) {
- strcpy(path, abs_path);
- strcat(path, "/");
- strcat(path, entry->d_name);
- ret = stat(path, &stat_buf);
- if(ret == -1) {
- perror(path);
- continue;
- }
- }
-
- closedir(dir);
- dir = opendir(abs_path);
-
- while((entry = readdir(dir)) != NULL) {
- if(entry->d_name[0] == '.') continue;
- if(g_str_has_prefix(entry->d_name, "metadata_") != 0) continue;
-
- strcpy(path, abs_path);
- strcat(path, "/");
- strcat(path, entry->d_name);
- if(ret == -1) {
- perror(path);
- continue;
- }
-
- header = ltt_tracefile_open_header(path, &tmp_tf);
-
- if(header == NULL) {
- g_info("Error getting the header %s", path);
- continue; /* error opening the tracefile : bad magic number ? */
- }
-
- version_number->ltt_major_version = header->major_version;
- version_number->ltt_minor_version = header->minor_version;
-
- return 1;
- }
-
- return -1;
-
- open_error:
- g_free(t);
- return -1;
-}
projects / lttv.git / blobdiff