+/* 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 program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License Version 2 as
+ * published by the Free Software Foundation;
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; 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 <malloc.h>
+#include <sys/mman.h>
+
+// For realpath
+#include <limits.h>
+#include <stdlib.h>
+
+
+#include "parser.h"
+#include <ltt/ltt.h>
+#include "ltt-private.h"
+#include <ltt/trace.h>
+#include <ltt/facility.h>
+#include <ltt/event.h>
+#include <ltt/type.h>
+#include <ltt/ltt-types.h>
+
+
+/* Facility names used in this file */
+
+GQuark LTT_FACILITY_NAME_HEARTBEAT,
+ LTT_EVENT_NAME_HEARTBEAT;
+
+#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)
+#define g_debug(format...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_DEBUG, format)
+
+#define g_close close
+
+/* obtain the time of an event */
+
+static inline LttTime getEventTime(LttTracefile * tf);
+
+
+/* set the offset of the fields belonging to the event,
+ need the information of the archecture */
+void setFieldsOffset(LttTracefile *tf,LttEventType *evT,void *evD,LttTrace *t);
+
+/* get the size of the field type according to the archtecture's
+ size and endian type(info of the archecture) */
+static inline gint getFieldtypeSize(LttTracefile * tf,
+ LttEventType * evT, gint offsetRoot,
+ gint offsetParent, LttField *fld, void *evD, LttTrace* t);
+
+/* read a fixed size or a block information from the file (fd) */
+int map_block(LttTracefile * tf, unsigned int block_num);
+
+/* calculate cycles per nsec for current block */
+void getCyclePerNsec(LttTracefile * t);
+
+/* reinitialize the info of the block which is already in the buffer */
+void updateTracefile(LttTracefile * tf);
+
+/* go to the next event */
+int skipEvent(LttTracefile * t);
+
+
+/* Functions to parse system.xml file (using glib xml parser) */
+static void parser_start_element (GMarkupParseContext __UNUSED__ *context,
+ const gchar *element_name,
+ const gchar **attribute_names,
+ const gchar **attribute_values,
+ gpointer user_data,
+ GError **error)
+{
+ int i=0;
+ LttSystemDescription* des = (LttSystemDescription* )user_data;
+ if(strcmp("system", element_name)){
+ *error = g_error_new(G_MARKUP_ERROR,
+ G_LOG_LEVEL_WARNING,
+ "This is not system.xml file");
+ return;
+ }
+
+ while(attribute_names[i]){
+ if(strcmp("node_name", attribute_names[i])==0){
+ des->node_name = g_strdup(attribute_values[i]);
+ }else if(strcmp("domainname", attribute_names[i])==0){
+ des->domain_name = g_strdup(attribute_values[i]);
+ }else if(strcmp("cpu", attribute_names[i])==0){
+ des->nb_cpu = atoi(attribute_values[i]);
+ }else if(strcmp("arch_size", attribute_names[i])==0){
+ if(strcmp(attribute_values[i],"LP32") == 0) des->size = LTT_LP32;
+ else if(strcmp(attribute_values[i],"ILP32") == 0) des->size = LTT_ILP32;
+ else if(strcmp(attribute_values[i],"LP64") == 0) des->size = LTT_LP64;
+ else if(strcmp(attribute_values[i],"ILP64") == 0) des->size = LTT_ILP64;
+ else if(strcmp(attribute_values[i],"UNKNOWN") == 0) des->size = LTT_UNKNOWN;
+ }else if(strcmp("endian", attribute_names[i])==0){
+ if(strcmp(attribute_values[i],"LITTLE_ENDIAN") == 0)
+ des->endian = LTT_LITTLE_ENDIAN;
+ else if(strcmp(attribute_values[i],"BIG_ENDIAN") == 0)
+ des->endian = LTT_BIG_ENDIAN;
+ }else if(strcmp("kernel_name", attribute_names[i])==0){
+ des->kernel_name = g_strdup(attribute_values[i]);
+ }else if(strcmp("kernel_release", attribute_names[i])==0){
+ des->kernel_release = g_strdup(attribute_values[i]);
+ }else if(strcmp("kernel_version", attribute_names[i])==0){
+ des->kernel_version = g_strdup(attribute_values[i]);
+ }else if(strcmp("machine", attribute_names[i])==0){
+ des->machine = g_strdup(attribute_values[i]);
+ }else if(strcmp("processor", attribute_names[i])==0){
+ des->processor = g_strdup(attribute_values[i]);
+ }else if(strcmp("hardware_platform", attribute_names[i])==0){
+ des->hardware_platform = g_strdup(attribute_values[i]);
+ }else if(strcmp("operating_system", attribute_names[i])==0){
+ des->operating_system = g_strdup(attribute_values[i]);
+ }else if(strcmp("ltt_major_version", attribute_names[i])==0){
+ des->ltt_major_version = atoi(attribute_values[i]);
+ }else if(strcmp("ltt_minor_version", attribute_names[i])==0){
+ des->ltt_minor_version = atoi(attribute_values[i]);
+ }else if(strcmp("ltt_block_size", attribute_names[i])==0){
+ des->ltt_block_size = atoi(attribute_values[i]);
+ }else{
+ *error = g_error_new(G_MARKUP_ERROR,
+ G_LOG_LEVEL_WARNING,
+ "Not a valid attribute");
+ return;
+ }
+ i++;
+ }
+}
+
+static void parser_characters (GMarkupParseContext __UNUSED__ *context,
+ const gchar *text,
+ gsize __UNUSED__ text_len,
+ gpointer user_data,
+ GError __UNUSED__ **error)
+{
+ LttSystemDescription* des = (LttSystemDescription* )user_data;
+ des->description = g_strdup(text);
+}
+
+
+/*****************************************************************************
+ *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.
+ ****************************************************************************/
+
+int ltt_tracefile_open(LttTrace *t, gchar * fileName, LttTracefile *tf)
+{
+ struct stat lTDFStat; /* Trace data file status */
+ struct ltt_block_start_header *header;
+
+ //open the file
+ tf->name = g_quark_from_string(fileName);
+ tf->trace = t;
+ tf->fd = g_open(fileName, O_RDONLY, 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;
+ }
+
+ // Is the file large enough to contain a trace
+ if(lTDFStat.st_size < (off_t)(sizeof(BlockStart))){
+ 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, sizeof(struct ltt_block_start_header), PROT_READ,
+ tf->fd, 0);
+ if(tf->buffer == NULL) {
+ perror("Error in allocating memory for buffer of tracefile %s\n", fileName);
+ goto close_file;
+ }
+ g_assert(tf->buffer.head & (8-1) == 0); // make sure it's aligned.
+
+ header = (struct ltt_block_start_header*)tf->buffer.head;
+
+ if(header->traceset.magic_number == LTT_MAGIC_NUMBER)
+ tf->reverse_bo = 0;
+ else if(header->traceset.magic_number == LTT_REV_MAGIC_NUMBER)
+ tf->reverse_bo = 1;
+ else /* invalid magic number, bad tracefile ! */
+ goto unmap_file;
+
+ //store the size of the file
+ tf->file_size = lTDFStat.st_size;
+ tf->block_size = header->buf_size;
+ tf->block_number = tf->file_size / tf->block_size;
+
+ vfree(tf->buffer.head);
+ tf->buffer.head = NULL;
+
+ //read the first block
+ if(map_block(tf,0)) {
+ perror("Cannot map block %u for tracefile %s\n", 0, fileName);
+ goto close_file;
+ }
+
+ return 0;
+
+ /* Error */
+unmap_file:
+ munmap(tf->buffer.head, sizeof(struct ltt_block_start_header));
+close_file:
+ g_close(tf->fd);
+end:
+ return -1;
+}
+
+
+/*****************************************************************************
+ *Open control and per cpu tracefiles
+ ****************************************************************************/
+
+void ltt_tracefile_open_cpu(LttTrace *t, gchar * tracefile_name)
+{
+ LttTracefile * tf;
+ tf = ltt_tracefile_open(t,tracefile_name);
+ if(!tf) return;
+ t->per_cpu_tracefile_number++;
+ g_ptr_array_add(t->per_cpu_tracefiles, tf);
+}
+
+gint ltt_tracefile_open_control(LttTrace *t, gchar * control_name)
+{
+ LttTracefile * tf;
+ LttEvent ev;
+ LttFacility * f;
+ void * pos;
+ FacilityLoad fLoad;
+ unsigned int i;
+
+ tf = ltt_tracefile_open(t,control_name);
+ if(!tf) {
+ g_warning("ltt_tracefile_open_control : bad file descriptor");
+ return -1;
+ }
+ t->control_tracefile_number++;
+ g_ptr_array_add(t->control_tracefiles,tf);
+
+ //parse facilities tracefile to get base_id
+ if(strcmp(&control_name[strlen(control_name)-10],"facilities") ==0){
+ while(1){
+ if(!ltt_tracefile_read(tf,&ev)) return 0; // end of file
+
+ if(ev.event_id == TRACE_FACILITY_LOAD){
+ pos = ev.data;
+ fLoad.name = (gchar*)pos;
+ fLoad.checksum = *(LttChecksum*)(pos + strlen(fLoad.name));
+ fLoad.base_code = *(guint32 *)(pos + strlen(fLoad.name) + sizeof(LttChecksum));
+
+ for(i=0;i<t->facility_number;i++){
+ f = (LttFacility*)g_ptr_array_index(t->facilities,i);
+ if(strcmp(f->name,fLoad.name)==0 && fLoad.checksum==f->checksum){
+ f->base_id = fLoad.base_code;
+ break;
+ }
+ }
+ if(i==t->facility_number) {
+ g_warning("Facility: %s, checksum: %u is not found",
+ fLoad.name,(unsigned int)fLoad.checksum);
+ return -1;
+ }
+ }else if(ev.event_id == TRACE_BLOCK_START){
+ continue;
+ }else if(ev.event_id == TRACE_BLOCK_END){
+ break;
+ }else {
+ g_warning("Not valid facilities trace file");
+ return -1;
+ }
+ }
+ }
+ return 0;
+}
+
+/*****************************************************************************
+ *Function name
+ * ltt_tracefile_close: close a trace file,
+ *Input params
+ * t : tracefile which will be closed
+ ****************************************************************************/
+
+void ltt_tracefile_close(LttTracefile *t)
+{
+ if(t->buffer.head != NULL)
+ munmap(t->buffer.head, t->buf_size);
+ g_close(t->fd);
+}
+
+
+/*****************************************************************************
+ *Get system information
+ ****************************************************************************/
+gint getSystemInfo(LttSystemDescription* des, gchar * pathname)
+{
+ int fd;
+ GIOChannel *iochan;
+ gchar *buf = NULL;
+ gsize length;
+
+ GMarkupParseContext * context;
+ GError * error = NULL;
+ GMarkupParser markup_parser =
+ {
+ parser_start_element,
+ NULL,
+ parser_characters,
+ NULL, /* passthrough */
+ NULL /* error */
+ };
+
+ fd = g_open(pathname, O_RDONLY, 0);
+ if(fd == -1){
+ g_warning("Can not open file : %s\n", pathname);
+ return -1;
+ }
+
+ iochan = g_io_channel_unix_new(fd);
+
+ context = g_markup_parse_context_new(&markup_parser, 0, des,NULL);
+
+ //while(fgets(buf,DIR_NAME_SIZE, fp) != NULL){
+ while(g_io_channel_read_line(iochan, &buf, &length, NULL, &error)
+ != G_IO_STATUS_EOF) {
+
+ if(error != NULL) {
+ g_warning("Can not read xml file: \n%s\n", error->message);
+ g_error_free(error);
+ }
+ if(!g_markup_parse_context_parse(context, buf, length, &error)){
+ if(error != NULL) {
+ g_warning("Can not parse xml file: \n%s\n", error->message);
+ g_error_free(error);
+ }
+ g_markup_parse_context_free(context);
+
+ g_io_channel_shutdown(iochan, FALSE, &error); /* No flush */
+ if(error != NULL) {
+ g_warning("Can not close file: \n%s\n", error->message);
+ g_error_free(error);
+ }
+
+ close(fd);
+ return -1;
+ }
+ }
+ g_markup_parse_context_free(context);
+
+ g_io_channel_shutdown(iochan, FALSE, &error); /* No flush */
+ if(error != NULL) {
+ g_warning("Can not close file: \n%s\n", error->message);
+ g_error_free(error);
+ }
+
+ g_close(fd);
+
+ g_free(buf);
+ return 0;
+}
+
+/*****************************************************************************
+ *The following functions get facility/tracefile information
+ ****************************************************************************/
+
+gint getFacilityInfo(LttTrace *t, gchar* eventdefs)
+{
+ GDir * dir;
+ const gchar * name;
+ unsigned int i,j;
+ LttFacility * f;
+ LttEventType * et;
+ gchar fullname[DIR_NAME_SIZE];
+ GError * error = NULL;
+
+ dir = g_dir_open(eventdefs, 0, &error);
+
+ if(error != NULL) {
+ g_warning("Can not open directory: %s, %s\n", eventdefs, error->message);
+ g_error_free(error);
+ return -1;
+ }
+
+ while((name = g_dir_read_name(dir)) != NULL){
+ if(!g_pattern_match_simple("*.xml", name)) continue;
+ strcpy(fullname,eventdefs);
+ strcat(fullname,name);
+ ltt_facility_open(t,fullname);
+ }
+ g_dir_close(dir);
+
+ for(j=0;j<t->facility_number;j++){
+ f = (LttFacility*)g_ptr_array_index(t->facilities, j);
+ for(i=0; i<f->event_number; i++){
+ et = f->events[i];
+ setFieldsOffset(NULL, et, NULL, t);
+ }
+ }
+ return 0;
+}
+
+/*****************************************************************************
+ *A trace is specified as a pathname to the directory containing all the
+ *associated data (control tracefiles, per cpu tracefiles, event
+ *descriptions...).
+ *
+ *When a trace is closed, all the associated facilities, types and fields
+ *are released as well.
+ */
+
+
+/****************************************************************************
+ * 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.
+ */
+
+int get_tracefile_name_number(const gchar *raw_name,
+ GQuark *name,
+ guint *num)
+{
+ guint raw_name_len = strlen(raw_name);
+ gchar char_name[PATH_MAX]
+ gchar *digit_begin;
+ int i;
+ int underscore_pos;
+ long int cpu_num;
+ gchar *endptr;
+
+ for(i=raw_name_len-1;i>=0;i--) {
+ if(raw_name[i] == '_') break;
+ }
+ if(i==0) /* Either not found or name length is 0 */
+ return -1;
+ 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 */
+
+ char_name = strncpy(char_name, raw_name, underscore_pos);
+
+ *name = g_quark_from_string(char_name);
+ *num = cpu_num;
+
+ return 0;
+}
+
+
+void ltt_tracefile_group_destroy(gpointer data)
+{
+ GArray *group = (GArray *)data;
+ int i;
+ LttTracefile *tf;
+
+ for(i=0; i<group->len; i++) {
+ tf = &g_array_index (group, LttTracefile, i);
+ if(tf->cpu_online)
+ ltt_tracefile_close(tf);
+ }
+}
+
+gboolean ltt_tracefile_group_has_cpu_online(gpointer data)
+{
+ GArray *group = (GArray *)data;
+ 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".
+ *
+ * A tracefile group is simply an array where all the per cpu tracefiles sits.
+ */
+
+static int open_tracefiles(LttTrace *trace, char *root_path, GData *tracefiles)
+{
+ DIR *dir = opendir(root_path);
+ struct dirent *entry;
+ struct stat stat_buf;
+ int ret;
+ char path[PATH_MAX];
+ int path_len;
+ char *path_ptr;
+
+ if(channel_dir == NULL) {
+ perror(subchannel_name);
+ return ENOENT;
+ }
+
+ strncpy(path, root_path, PATH_MAX-1);
+ path_len = strlen(path);
+ path[path_len] = '/';
+ path_len++;
+ path_ptr = path + path_len;
+
+ while((entry = readdir(channel_dir)) != NULL) {
+
+ if(entry->d_name[0] == '.') continue;
+
+ strncpy(path_ptr, entry->d_name, PATH_MAX - path_len);
+
+ ret = stat(path, &stat_buf);
+ if(ret == -1) {
+ perror(path);
+ continue;
+ }
+
+ g_debug("Tracefile file or directory : %s\n", path);
+
+ if(S_ISDIR(stat_buf.st_mode)) {
+
+ g_debug("Entering subdirectory...\n");
+ ret = open_tracefiles(path, tracefiles);
+ if(ret < 0) continue;
+ } else if(S_ISREG(stat_buf.st_mode)) {
+ g_debug("Opening file.\n");
+
+ GQuark name;
+ guint num;
+ GArray *group;
+ LttTracefile *tf;
+ guint len;
+
+ if(get_tracefile_name_number(path, &name, &num))
+ continue; /* invalid name */
+
+ group = g_datalist_get_data(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_set_data_full(tracefiles, name,
+ group, ltt_tracefile_group_destroy);
+ }
+ /* Add the per cpu tracefile to the named group */
+ unsigned int old_len = group->len;
+ if(num+1 > old_len)
+ g_array_set_size(group, num+1);
+ tf = &g_array_index (group, LttTracefile, num);
+
+ if(ltt_tracefile_open(trace, path, tf)) {
+ g_info("Error opening tracefile %s", path);
+ g_array_set_size(group, old_len);
+
+ if(!ltt_tracefile_group_has_cpu_online(group))
+ g_datalist_remove_data(tracefiles, name);
+
+ continue; /* error opening the tracefile : bad magic number ? */
+ }
+ tf->cpu_online = 1;
+ }
+ }
+
+ closedir(dir);
+
+ return 0;
+}
+
+LttTrace *ltt_trace_open(const gchar *pathname)
+{
+ gchar abs_path[PATH_MAX];
+ LttTrace * t;
+ LttTracefile tf;
+ GArray *group;
+ int i;
+
+ LttTrace * t = g_new(LttTrace, 1);
+ if(!t) goto alloc_error;
+
+ get_absolute_pathname(pathname, abs_path);
+ t->pathname = g_quark_from_string(abs_path);
+
+ /* Open all the tracefiles */
+ g_datalist_init(t->tracefiles);
+ if(open_tracefiles(t, abs_path, t->tracefiles))
+ goto open_error;
+
+ /* Load trace XML event descriptions */
+ //TODO
+
+ /* Parse each trace control/facilitiesN files : get runtime fac. info */
+ group = g_datalist_get_data(t->tracefiles, LTT_TRACEFILE_NAME_FACILITIES);
+ if(group == NULL) {
+ g_error("Trace %s has no facility tracefile", abs_path);
+ goto facilities_error;
+ }
+
+ for(i=0; i<group->len; i++) {
+ tf = &g_array_index (group, LttTracefile, i);
+ //TODO
+ process_facility_tracefile(tf);
+ }
+
+
+
+ return t;
+
+ /* Error handling */
+facilities_error:
+open_error:
+ g_datalist_clear(t->tracefiles);
+ g_free(t);
+alloc_error:
+ return NULL;
+
+
+
+ LttSystemDescription * sys_description;
+ gchar eventdefs[DIR_NAME_SIZE];
+ gchar info[DIR_NAME_SIZE];
+ gchar cpu[DIR_NAME_SIZE];
+ gchar tmp[DIR_NAME_SIZE];
+ gboolean has_slash = FALSE;
+
+ //establish the pathname to different directories
+ if(abs_path[strlen(abs_path)-1] == '/')has_slash = TRUE;
+ strcpy(eventdefs,abs_path);
+ if(!has_slash)strcat(eventdefs,"/");
+ strcat(eventdefs,"eventdefs/");
+
+ strcpy(info,abs_path);
+ if(!has_slash)strcat(info,"/");
+ strcat(info,"info/");
+
+ strcpy(control,abs_path);
+ if(!has_slash)strcat(control,"/");
+ strcat(control,"control/");
+
+ strcpy(cpu,abs_path);
+ if(!has_slash)strcat(cpu,"/");
+ strcat(cpu,"cpu/");
+
+ //new trace
+ sys_description = g_new(LttSystemDescription, 1);
+ t = g_new(LttTrace, 1);
+ t->pathname = g_strdup(abs_path);
+ t->facility_number = 0;
+ t->control_tracefile_number = 0;
+ t->per_cpu_tracefile_number = 0;
+ t->system_description = sys_description;
+ t->control_tracefiles = g_ptr_array_new();
+ t->per_cpu_tracefiles = g_ptr_array_new();
+ t->facilities = g_ptr_array_new();
+ //getDataEndianType(&(t->my_arch_size), &(t->my_arch_endian));
+
+ //get system description
+ strcpy(tmp,info);
+ strcat(tmp,"system.xml");
+ if(getSystemInfo(sys_description, tmp)) {
+ g_ptr_array_free(t->facilities, TRUE);
+ g_ptr_array_free(t->per_cpu_tracefiles, TRUE);
+ g_ptr_array_free(t->control_tracefiles, TRUE);
+ g_free(sys_description);
+ g_free(t->pathname);
+ g_free(t);
+ return NULL;
+ }
+
+ /* Set the reverse byte order between trace and reader */
+ if(sys_description->endian == LTT_LITTLE_ENDIAN
+ && G_BYTE_ORDER != G_LITTLE_ENDIAN) {
+ t->reverse_byte_order = 1;
+ } else if(sys_description->endian == LTT_BIG_ENDIAN
+ && G_BYTE_ORDER != G_BIG_ENDIAN) {
+ t->reverse_byte_order = 1;
+ } else t->reverse_byte_order = 0;
+
+ //get facilities info
+ if(getFacilityInfo(t,eventdefs)) {
+ g_ptr_array_free(t->facilities, TRUE);
+ g_ptr_array_free(t->per_cpu_tracefiles, TRUE);
+ g_ptr_array_free(t->control_tracefiles, TRUE);
+ g_free(sys_description);
+ g_free(t->pathname);
+ g_free(t);
+ return NULL;
+ }
+
+ //get control tracefile info
+ getControlFileInfo(t,control);
+ /*
+ if(getControlFileInfo(t,control)) {
+ g_ptr_array_free(t->facilities, TRUE);
+ g_ptr_array_free(t->per_cpu_tracefiles, TRUE);
+ g_ptr_array_free(t->control_tracefiles, TRUE);
+ g_free(sys_description);
+ g_free(t->pathname);
+ g_free(t);
+ return NULL;
+ }*/ // With fatal error
+
+ //get cpu tracefile info
+ if(getCpuFileInfo(t,cpu)) {
+ g_ptr_array_free(t->facilities, TRUE);
+ g_ptr_array_free(t->per_cpu_tracefiles, TRUE);
+ g_ptr_array_free(t->control_tracefiles, TRUE);
+ g_free(sys_description);
+ g_free(t->pathname);
+ g_free(t);
+ return NULL;
+ }
+
+ return t;
+}
+
+char * ltt_trace_name(LttTrace *t)
+{
+ return t->pathname;
+}
+
+
+/******************************************************************************
+ * 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(self->pathname);
+}
+
+void ltt_trace_close(LttTrace *t)
+{
+ unsigned int i;
+ LttTracefile * tf;
+ LttFacility * f;
+
+ g_free(t->pathname);
+
+ //free system_description
+ g_free(t->system_description->description);
+ g_free(t->system_description->node_name);
+ g_free(t->system_description->domain_name);
+ g_free(t->system_description->kernel_name);
+ g_free(t->system_description->kernel_release);
+ g_free(t->system_description->kernel_version);
+ g_free(t->system_description->machine);
+ g_free(t->system_description->processor);
+ g_free(t->system_description->hardware_platform);
+ g_free(t->system_description->operating_system);
+ g_free(t->system_description);
+
+ //free control_tracefiles
+ for(i=0;i<t->control_tracefile_number;i++){
+ tf = (LttTracefile*)g_ptr_array_index(t->control_tracefiles,i);
+ ltt_tracefile_close(tf);
+ }
+ g_ptr_array_free(t->control_tracefiles, TRUE);
+
+ //free per_cpu_tracefiles
+ for(i=0;i<t->per_cpu_tracefile_number;i++){
+ tf = (LttTracefile*)g_ptr_array_index(t->per_cpu_tracefiles,i);
+ ltt_tracefile_close(tf);
+ }
+ g_ptr_array_free(t->per_cpu_tracefiles, TRUE);
+
+ //free facilities
+ for(i=0;i<t->facility_number;i++){
+ f = (LttFacility*)g_ptr_array_index(t->facilities,i);
+ ltt_facility_close(f);
+ }
+ g_ptr_array_free(t->facilities, TRUE);
+
+ g_free(t);
+
+ g_blow_chunks();
+}
+
+
+/*****************************************************************************
+ *Get the system description of the trace
+ ****************************************************************************/
+
+LttSystemDescription *ltt_trace_system_description(LttTrace *t)
+{
+ return t->system_description;
+}
+
+/*****************************************************************************
+ * The following functions discover the facilities of the trace
+ ****************************************************************************/
+
+unsigned ltt_trace_facility_number(LttTrace *t)
+{
+ return (unsigned)(t->facility_number);
+}
+
+LttFacility *ltt_trace_facility_get(LttTrace *t, unsigned i)
+{
+ return (LttFacility*)g_ptr_array_index(t->facilities, i);
+}
+
+/*****************************************************************************
+ *Function name
+ * ltt_trace_facility_find : find facilities in the trace
+ *Input params
+ * t : the trace
+ * name : facility name
+ *Output params
+ * position : position of the facility in the trace
+ *Return value
+ * : the number of facilities
+ ****************************************************************************/
+
+unsigned ltt_trace_facility_find(LttTrace *t, char *name, unsigned *position)
+{
+ unsigned int i, count=0;
+ LttFacility * f;
+ for(i=0;i<t->facility_number;i++){
+ f = (LttFacility*)g_ptr_array_index(t->facilities, i);
+ if(strcmp(f->name,name)==0){
+ count++;
+ if(count==1) *position = i;
+ }else{
+ if(count) break;
+ }
+ }
+ return count;
+}
+
+/*****************************************************************************
+ * Functions to discover all the event types in the trace
+ ****************************************************************************/
+
+unsigned ltt_trace_eventtype_number(LttTrace *t)
+{
+ unsigned int i;
+ unsigned count = 0;
+ unsigned int num = t->facility_number;
+ LttFacility * f;
+
+ for(i=0;i<num;i++){
+ f = (LttFacility*)g_ptr_array_index(t->facilities, i);
+ count += f->event_number;
+ }
+ return count;
+}
+
+/* FIXME : performances could be improved with a better design for this
+ * function : sequential search through a container has never been the
+ * best on the critical path. */
+LttFacility * ltt_trace_facility_by_id(LttTrace * trace, unsigned id)
+{
+ LttFacility * facility = NULL;
+ unsigned int i;
+ unsigned int num = trace->facility_number;
+ GPtrArray *facilities = trace->facilities;
+
+ for(i=0;unlikely(i<num);){
+ LttFacility *iter_facility =
+ (LttFacility*) g_ptr_array_index(facilities,i);
+ unsigned base_id = iter_facility->base_id;
+
+ if(likely(id >= base_id &&
+ id < base_id + iter_facility->event_number)) {
+ facility = iter_facility;
+ break;
+ } else {
+ i++;
+ }
+ }
+
+ return facility;
+}
+
+LttEventType *ltt_trace_eventtype_get(LttTrace *t, unsigned evId)
+{
+ LttEventType *event_type;
+
+ LttFacility * f;
+ f = ltt_trace_facility_by_id(t,evId);
+
+ if(unlikely(!f)) event_type = NULL;
+ else event_type = f->events[evId - f->base_id];
+
+ return event_type;
+}
+
+/*****************************************************************************
+ *There is one "per cpu" tracefile for each CPU, numbered from 0 to
+ *the maximum number of CPU in the system. When the number of CPU installed
+ *is less than the maximum, some positions are unused. There are also a
+ *number of "control" tracefiles (facilities, interrupts...).
+ ****************************************************************************/
+unsigned ltt_trace_control_tracefile_number(LttTrace *t)
+{
+ return t->control_tracefile_number;
+}
+
+unsigned ltt_trace_per_cpu_tracefile_number(LttTrace *t)
+{
+ return t->per_cpu_tracefile_number;
+}
+
+/*****************************************************************************
+ *It is possible to search for the tracefiles by name or by CPU position.
+ *The index within the tracefiles of the same type is returned if found
+ *and a negative value otherwise.
+ ****************************************************************************/
+
+int ltt_trace_control_tracefile_find(LttTrace *t, const gchar *name)
+{
+ LttTracefile * tracefile;
+ unsigned int i;
+ for(i=0;i<t->control_tracefile_number;i++){
+ tracefile = (LttTracefile*)g_ptr_array_index(t->control_tracefiles, i);
+ if(strcmp(tracefile->name, name)==0)break;
+ }
+ if(i == t->control_tracefile_number) return -1;
+ return i;
+}
+
+/* not really useful. We just have to know that cpu tracefiles
+ * comes before control tracefiles.
+ */
+int ltt_trace_per_cpu_tracefile_find(LttTrace *t, const gchar *name)
+{
+ LttTracefile * tracefile;
+ unsigned int i;
+ for(i=0;i<t->per_cpu_tracefile_number;i++){
+ tracefile = (LttTracefile*)g_ptr_array_index(t->per_cpu_tracefiles, i);
+ if(strcmp(tracefile->name, name)==0)break;
+ }
+ if(i == t->per_cpu_tracefile_number) return -1;
+ return i;
+}
+
+/*****************************************************************************
+ *Get a specific tracefile
+ ****************************************************************************/
+
+LttTracefile *ltt_trace_control_tracefile_get(LttTrace *t, unsigned i)
+{
+ return (LttTracefile*)g_ptr_array_index(t->control_tracefiles, i);
+}
+
+LttTracefile *ltt_trace_per_cpu_tracefile_get(LttTrace *t, unsigned i)
+{
+ return (LttTracefile*)g_ptr_array_index(t->per_cpu_tracefiles, i);
+}
+
+/*****************************************************************************
+ * Get the start time and end time of the trace
+ ****************************************************************************/
+
+static void ltt_tracefile_time_span_get(LttTracefile *tf,
+ LttTime *start, LttTime *end)
+{
+ struct ltt_block_start_header * header;
+ int err;
+
+ err = map_block(tf, 0);
+ if(unlikely(err)) {
+ g_error("Can not map block");
+ *start = { 0xFFFFFFFF, 0xFFFFFFFF };
+ } 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 = { 0, 0 };
+ } else
+ *end = tf->buffer.end.timestamp;
+}
+
+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;
+ 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;
+ }
+ }
+}
+
+void ltt_trace_time_span_get(LttTrace *t, LttTime *start, LttTime *end)
+{
+ LttTime min_start = { 0xFFFFFFFF, 0xFFFFFFFF };
+ LttTime max_end = { 0, 0 };
+ 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;
+
+}
+
+
+/*****************************************************************************
+ *Get the name of a tracefile
+ ****************************************************************************/
+
+char *ltt_tracefile_name(LttTracefile *tf)
+{
+ return tf->name;
+}
+
+/*****************************************************************************
+ * Get the number of blocks in the tracefile
+ ****************************************************************************/
+
+unsigned ltt_tracefile_block_number(LttTracefile *tf)
+{
+ return tf->block_number;
+}
+
+
+/* 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
+ * or the last event of the tracefile.
+ *
+ * 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, get the last event.
+ *
+ * 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.
+ *
+ * */
+
+void ltt_tracefile_seek_time(LttTracefile *tf, LttTime time)
+{
+ int err;
+ unsigned int block_num, high, low;
+
+ /* seek at the beginning of trace */
+ err = map_block(tf, 0); /* First block */
+ 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.start.timestamp) <= 0) {
+ ltt_tracefile_read(tf)
+ 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, get the last event. */
+ if(ltt_time_compare(time, tf->buffer.end.timestamp) >= 0) {
+ /* While the ltt_tracefile_read_event doesn't return NULL, continue reading
+ */
+ while(ltt_tracefile_read(tf));
+ goto found;
+ }
+
+ /* 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(ltt_time_compare(time, tf->buffer.start.timestamp) < 0) {
+ /* go to lower part */
+ high = block_num;
+ } else if(ltt_time_compare(time, tf->buffer.end.timestamp) > 0) {
+ /* go to higher part */
+ low = block_num;
+ } else {/* The event is right in the buffer!
+ (or in the next buffer first event) */
+ while(1) {
+ ltt_tracefile_read(tf);
+ if(ltt_time_compare(time, tf->event.event_time) >= 0)
+ break;
+ }
+ goto found;
+ }
+ }
+
+found:
+
+ return;
+
+ /* Error handling */
+fail:
+ g_error("ltt_tracefile_seek_time failed on tracefile %s",
+ g_quark_to_string(tf->name));
+}
+
+
+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;
+
+ if(!ltt_tracefile_read(tf)) goto fail;
+
+ return;
+
+fail:
+ g_error("ltt_tracefile_seek_time failed on tracefile %s",
+ g_quark_to_string(tf->name));
+}
+
+
+
+/*****************************************************************************
+ * Seek to the first event with position equal or larger to ep
+ *
+ * Modified by Mathieu Desnoyers to used faster offset position instead of
+ * re-reading the whole buffer.
+ ****************************************************************************/
+
+void ltt_tracefile_seek_position(LttTracefile *t, const LttEventPosition *ep)
+{
+ //if we are at the right place, just return
+ if(likely(t->which_block == ep->block_num && t->which_event == ep->event_num))
+ return;
+
+ if(likely(t->which_block == ep->block_num)) updateTracefile(t);
+ else readBlock(t,ep->block_num);
+ //event offset is available
+ if(likely(ep->old_position)){
+ int err;
+
+ t->which_event = ep->event_num;
+ t->cur_event_pos = t->buffer + ep->event_offset;
+ t->prev_event_time = ep->event_time;
+ t->current_event_time = ep->event_time;
+ t->cur_heart_beat_number = ep->heart_beat_number;
+ t->cur_cycle_count = ep->event_cycle_count;
+
+ /* This is a workaround for fast position seek */
+ t->last_event_pos = ep->last_event_pos;
+ t->prev_block_end_time = ep->prev_block_end_time;
+ t->prev_event_time = ep->prev_event_time;
+ t->pre_cycle_count = ep->pre_cycle_count;
+ t->count = ep->count;
+ t->overflow_nsec = ep->overflow_nsec;
+ t->last_heartbeat = ep->last_heartbeat;
+ /* end of workaround */
+
+ //update the fields of the current event and go to the next event
+ err = skipEvent(t);
+ if(unlikely(err == ERANGE)) g_error("event id is out of range\n");
+
+ return;
+ }
+
+ //only block number and event index are available
+ //MD: warning : this is slow!
+ g_warning("using slow O(n) tracefile seek position");
+
+ LttEvent event;
+ while(likely(t->which_event < ep->event_num)) ltt_tracefile_read(t, &event);
+
+ return;
+}
+
+/* Calculate the real event time based on the buffer boundaries */
+LttTime ltt_interpolate_time(LttTracefile *tf, LttEvent *event)
+{
+ LttTime time;
+
+ g_assert(t->trace->has_tsc);
+
+ time = ltt_time_from_uint64(
+ (guint64)tf->buffer.tsc*tf->buffer.nsecs_per_cycle);
+ time = ltt_time_add(tf->buffer.begin.timestamp, time);
+
+ return time;
+}
+
+
+/*****************************************************************************
+ *Function name
+ * ltt_tracefile_read : Read the next event in the tracefile
+ *Input params
+ * t : tracefile
+ *Return value
+ * LttEvent * : an event to be processed
+ * Note : it points to the current tf->event. It will be overwritten
+ * by the next call to ltt_tracefile_read or any map_block.
+ *
+ * Returns NULL on end of trace (or error).
+ *
+ *
+ * This function does make the tracefile event structure point to the event
+ * currently pointed to by the
+ ****************************************************************************/
+
+LttEvent *ltt_tracefile_read(LttTracefile *tf)
+{
+ int err;
+ LttFacility *f;
+ void * pos;
+
+ /* Skip the current event to go to the next, or point to the
+ * t->buffer.head + t->buffer.lost_size if we were on the last
+ * event of a buffer.
+ */
+ err = ltt_seek_next_event(tf);
+ if(unlikely(err == ERANGE)) {
+ g_error("event id is out of range\n");
+ return NULL;
+ }
+
+ pos = tf->event.offset;
+
+ /* Are we at the end of the buffer ? */
+ if(unlikely(pos == tf->buffer.head + tf->buffer.lost_size)) {
+ if(unlikely(tf->buffer.index == tf->num_blocks-1)){ /* end of trace ? */
+ return NULL;
+ } else {
+ /* get next block */
+ err = map_block(tf, tf->buffer.index + 1);
+ if(unlikely(err)) {
+ g_error("Can not map block");
+ return NULL;
+ }
+ pos = tf->event.offset;
+ }
+ }
+
+ /* Read event header */
+
+ //TODO align
+
+ if(tf->trace->has_tsc) {
+ event->time.timestamp = ltt_get_uint32(LTT_GET_BO(t),
+ tf->cur_event_pos);
+ /* 32 bits -> 64 bits tsc */
+ if(event->time.timestamp < (0xFFFFFFFFULL&tf->buffer.tsc)) {
+ tf->buffer.tsc = ((tf->buffer.tsc&0xFFFFFFFF00000000ULL)
+ + 0x100000000ULL)
+ | (guint64)event->time.timestamp;
+
+ event->event_time = ltt_interpolate_time(tf, event);
+ } else {
+ /* no overflow */
+ tf->buffer.tsc = (tf->buffer.tsc&0xFFFFFFFF00000000ULL)
+ | (guint64)event->time.timestamp;
+ }
+ pos += sizeof(uint32);
+ } else {
+ event->time.delta = ltt_get_uint32(LTT_GET_BO(tf),
+ tf->cur_event_pos);
+ tf->buffer.tsc = 0;
+
+ event->event_time = ltt_time_add(tf->buffer.begin.timestamp,
+ event->time_delta);
+ pos += sizeof(uint32);
+ }
+
+ event->facility_id = ltt_get_uint8(LTT_GET_BO(tf),
+ tf->cur_event_pos);
+ pos += sizeof(uint8);
+
+ event->event_id = ltt_get_uint8(LTT_GET_BO(tf),
+ tf->cur_event_pos);
+ pos += sizeof(uint8);
+
+ event->data = tf->cur_event_pos + EVENT_HEADER_SIZE;
+
+ event->data = pos;
+
+ /* do event specific operation */
+
+ /* do something if its an heartbeat event : increment the heartbeat count */
+ if(event->facility_id != 0) { /* except core */
+ f = (LttFacility*)g_ptr_array_index(tf->trace->facilities,
+ event->facility_id);
+ g_assert(f != NULL);
+
+ if(unlikely(ltt_facility_name(f)
+ != LTT_FACILITY_NAME_HEARTBEAT)) {
+ LttEventType *et = ltt_facility_eventtype_get_by_name(f,
+ LTT_EVENT_NAME_HEARTBEAT);
+ if(et->id == event->event_id)
+ t->cur_heart_beat_number++;
+
+ }
+ }
+
+ return event;
+}
+
+/****************************************************************************
+ *Function name
+ * readFile : wrap function to read from a file
+ *Input Params
+ * fd : file descriptor
+ * buf : buf to contain the content
+ * size : number of bytes to be read
+ * mesg : message to be printed if some thing goes wrong
+ *return value
+ * 0 : success
+ * EIO : can not read from the file
+ ****************************************************************************/
+#if 0
+int readFile(int fd, void * buf, size_t size, char * mesg)
+{
+ ssize_t nbBytes = read(fd, buf, size);
+
+ if((size_t)nbBytes != size) {
+ if(nbBytes < 0) {
+ perror("Error in readFile : ");
+ } else {
+ g_warning("%s",mesg);
+ }
+ return EIO;
+ }
+ return 0;
+}
+#endif //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 int map_block(LttTracefile * tf, int block_num)
+{
+ struct ltt_block_start_header *header;
+
+ g_assert(block_num < tf->num_blocks);
+
+ if(tf->buffer.head != NULL)
+ munmap(tf->buffer.head, tf->buf_size);
+
+ /* Multiple of pages aligned head */
+ tf->buffer.head = mmap(0, tf->block_size, PROT_READ, tf->fd,
+ (off_t)tf->block_size * (off_t)block_num);
+
+ if(tf->buffer.head == NULL) {
+ perror("Error in allocating memory for buffer of tracefile %s\n", fileName);
+ goto map_error;
+ }
+ g_assert(tf->buffer.head & (8-1) == 0); // make sure it's aligned.
+
+
+ tf->buffer.index = block_num;
+
+ header = (struct ltt_block_start_header*)tf->buffer.head;
+
+ tf->buffer.begin.timestamp = ltt_get_uint64(LTT_GET_BO(tf),
+ header->begin.timestamp)
+ * NSEC_PER_USEC;
+ tf->buffer.begin.cycle_count = ltt_get_uint64(LTT_GET_BO(tf),
+ header->begin.cycle_count);
+ tf->buffer.end.timestamp = ltt_get_uint64(LTT_GET_BO(tf),
+ header->end.timestamp)
+ * NSEC_PER_USEC;
+ tf->buffer.end.cycle_count = ltt_get_uint64(LTT_GET_BO(tf),
+ header->end.cycle_count);
+ tf->buffer.lost_size = ltt_get_uint32(LTT_GET_BO(tf),
+ header->lost_size);
+
+ tf->buffer.tsc = tf->buffer.begin.cycle_count;
+
+ /* FIXME
+ * eventually support variable buffer size : will need a partial pre-read of
+ * the headers to create an index when we open the trace... eventually. */
+ g_assert(tf->block_size == ltt_get_uint32(header->buf_size));
+
+ /* Now that the buffer is mapped, calculate the time interpolation for the
+ * block. */
+
+ tf->buffer.nsecs_per_cycle = calc_nsecs_per_cycle(&tf->buffer);
+
+ /* 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 = tf->buffer.head;
+
+ return 0;
+
+map_error:
+ return -errno;
+
+}
+
+/*****************************************************************************
+ *Function name
+ * updateTracefile : reinitialize the info of the block which is already
+ * in the buffer
+ *Input params
+ * tf : tracefile
+ ****************************************************************************/
+
+void updateTracefile(LttTracefile * tf)
+{
+ tf->which_event = 1;
+ tf->cur_event_pos = tf->buffer;
+ tf->current_event_time = getEventTime(tf);
+ tf->cur_heart_beat_number = 0;
+
+ tf->prev_event_time.tv_sec = 0;
+ tf->prev_event_time.tv_nsec = 0;
+ tf->count = 0;
+
+ tf->overflow_nsec =
+ (-((double)ltt_get_uint64(tf->trace->reverse_byte_order,
+ &tf->a_block_start->cycle_count))
+ * tf->nsec_per_cycle);
+
+}
+
+/* Take the tf current event offset and use the event facility id and 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.
+ */
+static int ltt_seek_next_event(LttTracefile *tf)
+{
+ void *pos;
+
+ /* seek over the buffer header if we are at the buffer start */
+ if(tf->event.offset == tf->buffer.head) {
+ tf->event.offset += sizeof(struct ltt_block_start_header);
+ goto found;
+ }
+
+ /* if we are at the end of a buffer, generate an error, not supposed to
+ * happen. */
+ if(tf->event.offset == tf->buffer.head + tf->buffer.lost_size)
+ goto error;
+
+ pos = tf->event.data;
+
+ pos += ltt_facility_get_event_size(tf->event.facility_id, tf->event.event_id);
+
+ tf->event.offset = pos;
+
+found:
+ return 0;
+
+error:
+ g_error("Error in ltt_seek_next_event for tracefile %s",
+ g_quark_to_string(tf->name));
+ return ERANGE;
+}
+
+
+/*****************************************************************************
+ *Function name
+ * calc_nsecs_per_cycle : calculate nsecs per cycle for current block
+ *Input Params
+ * t : tracefile
+ ****************************************************************************/
+
+static double calc_nsecs_per_cycle(LttTracefile * t)
+{
+ LttTime lBufTotalTime; /* Total time for this buffer */
+ double lBufTotalNSec; /* Total time for this buffer in nsecs */
+ LttCycleCount lBufTotalCycle;/* Total cycles for this buffer */
+
+ /* Calculate the total time for this buffer */
+ lBufTotalTime = ltt_time_sub(
+ ltt_get_time(t->buffer.end.timestamp),
+ ltt_get_time(t->buffer.begin.timestamp));
+
+ /* Calculate the total cycles for this bufffer */
+ lBufTotalCycle = t->buffer.end.cycle_count;
+ lBufTotalCycle -= t->buffer.start.cycle_count;
+
+ /* Convert the total time to double */
+ lBufTotalNSec = ltt_time_to_double(lBufTotalTime);
+
+ return lBufTotalNSec / (double)lBufTotalCycle;
+
+}
+
+/*****************************************************************************
+ *Function name
+ * setFieldsOffset : set offset of the fields
+ *Input params
+ * tracefile : opened trace file
+ * evT : the event type
+ * evD : event data, it may be NULL
+ ****************************************************************************/
+
+void setFieldsOffset(LttTracefile *tf,LttEventType *evT,void *evD,LttTrace* t)
+{
+ LttField * rootFld = evT->root_field;
+ // rootFld->base_address = evD;
+
+ if(likely(rootFld))
+ rootFld->field_size = getFieldtypeSize(tf, evT, 0,0,rootFld, evD,t);
+}
+
+/*****************************************************************************
+ *Function name
+ * getFieldtypeSize: get the size of the field type (primitive type)
+ *Input params
+ * tracefile : opened trace file
+ * evT : event type
+ * offsetRoot : offset from the root
+ * offsetParent : offset from the parrent
+ * fld : field
+ * evD : event data, it may be NULL
+ *Return value
+ * int : size of the field
+ ****************************************************************************/
+
+static inline gint getFieldtypeSize(LttTracefile * t,
+ LttEventType * evT, gint offsetRoot,
+ gint offsetParent, LttField * fld, void *evD, LttTrace *trace)
+{
+ gint size, size1, element_number, i, offset1, offset2;
+ LttType * type = fld->field_type;
+
+ if(unlikely(t && evT->latest_block==t->which_block &&
+ evT->latest_event==t->which_event)){
+ size = fld->field_size;
+ goto end_getFieldtypeSize;
+ } else {
+ /* This likely has been tested with gcov : half of them.. */
+ if(unlikely(fld->field_fixed == 1)){
+ /* tested : none */
+ if(unlikely(fld == evT->root_field)) {
+ size = fld->field_size;
+ goto end_getFieldtypeSize;
+ }
+ }
+
+ /* From gcov profiling : half string, half struct, can we gain something
+ * from that ? (Mathieu) */
+ switch(type->type_class) {
+ case LTT_ARRAY:
+ element_number = (int) type->element_number;
+ if(fld->field_fixed == -1){
+ size = getFieldtypeSize(t, evT, offsetRoot,
+ 0,fld->child[0], NULL, trace);
+ if(size == 0){ //has string or sequence
+ fld->field_fixed = 0;
+ }else{
+ fld->field_fixed = 1;
+ size *= element_number;
+ }
+ }else if(fld->field_fixed == 0){// has string or sequence
+ size = 0;
+ for(i=0;i<element_number;i++){
+ size += getFieldtypeSize(t, evT, offsetRoot+size,size,
+ fld->child[0], evD+size, trace);
+ }
+ }else size = fld->field_size;
+ if(unlikely(!evD)){
+ fld->fixed_root = (offsetRoot==-1) ? 0 : 1;
+ fld->fixed_parent = (offsetParent==-1) ? 0 : 1;
+ }
+
+ break;
+
+ case LTT_SEQUENCE:
+ size1 = (int) ltt_type_size(trace, type);
+ if(fld->field_fixed == -1){
+ fld->sequ_number_size = size1;
+ fld->field_fixed = 0;
+ size = getFieldtypeSize(t, evT, offsetRoot,
+ 0,fld->child[0], NULL, trace);
+ fld->element_size = size;
+ }else{//0: sequence
+ element_number = getIntNumber(t->trace->reverse_byte_order,size1,evD);
+ type->element_number = element_number;
+ if(fld->element_size > 0){
+ size = element_number * fld->element_size;
+ }else{//sequence has string or sequence
+ size = 0;
+ for(i=0;i<element_number;i++){
+ size += getFieldtypeSize(t, evT, offsetRoot+size+size1,size+size1,
+ fld->child[0], evD+size+size1, trace);
+ }
+ }
+ size += size1;
+ }
+ if(unlikely(!evD)){
+ fld->fixed_root = (offsetRoot==-1) ? 0 : 1;
+ fld->fixed_parent = (offsetParent==-1) ? 0 : 1;
+ }
+
+ break;
+
+ case LTT_STRING:
+ size = 0;
+ if(fld->field_fixed == -1){
+ fld->field_fixed = 0;
+ }else{//0: string
+ /* Hope my implementation is faster than strlen (Mathieu) */
+ char *ptr=(char*)evD;
+ size = 1;
+ /* from gcov : many many strings are empty, make it the common case.*/
+ while(unlikely(*ptr != '\0')) { size++; ptr++; }
+ //size = ptr - (char*)evD + 1; //include end : '\0'
+ }
+ fld->fixed_root = (offsetRoot==-1) ? 0 : 1;
+ fld->fixed_parent = (offsetParent==-1) ? 0 : 1;
+
+ break;
+
+ case LTT_STRUCT:
+ element_number = (int) type->element_number;
+ size = 0;
+ /* tested with gcov */
+ if(unlikely(fld->field_fixed == -1)){
+ offset1 = offsetRoot;
+ offset2 = 0;
+ for(i=0;i<element_number;i++){
+ size1=getFieldtypeSize(t, evT,offset1,offset2,
+ fld->child[i], NULL, trace);
+ if(likely(size1 > 0 && size >= 0)){
+ size += size1;
+ if(likely(offset1 >= 0)) offset1 += size1;
+ offset2 += size1;
+ }else{
+ size = -1;
+ offset1 = -1;
+ offset2 = -1;
+ }
+ }
+ if(unlikely(size == -1)){
+ fld->field_fixed = 0;
+ size = 0;
+ }else fld->field_fixed = 1;
+ }else if(likely(fld->field_fixed == 0)){
+ offset1 = offsetRoot;
+ offset2 = 0;
+ for(i=0;unlikely(i<element_number);i++){
+ size=getFieldtypeSize(t,evT,offset1,offset2,
+ fld->child[i],evD+offset2, trace);
+ offset1 += size;
+ offset2 += size;
+ }
+ size = offset2;
+ }else size = fld->field_size;
+ fld->fixed_root = (offsetRoot==-1) ? 0 : 1;
+ fld->fixed_parent = (offsetParent==-1) ? 0 : 1;
+ break;
+
+ default:
+ if(unlikely(fld->field_fixed == -1)){
+ size = (int) ltt_type_size(trace, type);
+ fld->field_fixed = 1;
+ }else size = fld->field_size;
+ if(unlikely(!evD)){
+ fld->fixed_root = (offsetRoot==-1) ? 0 : 1;
+ fld->fixed_parent = (offsetParent==-1) ? 0 : 1;
+ }
+ break;
+ }
+ }
+
+ fld->offset_root = offsetRoot;
+ fld->offset_parent = offsetParent;
+ fld->field_size = size;
+
+end_getFieldtypeSize:
+
+ return size;
+}
+
+
+/*****************************************************************************
+ *Function name
+ * getIntNumber : get an integer number
+ *Input params
+ * size : the size of the integer
+ * evD : the event data
+ *Return value
+ * gint64 : a 64 bits integer
+ ****************************************************************************/
+
+gint64 getIntNumber(gboolean reverse_byte_order, int size, void *evD)
+{
+ gint64 i;
+
+ switch(size) {
+ case 1: i = *((gint8*)evD); break;
+ case 2: i = ltt_get_int16(reverse_byte_order, evD); break;
+ case 4: i = ltt_get_int32(reverse_byte_order, evD); break;
+ case 8: i = ltt_get_int64(reverse_byte_order, evD); break;
+ default: i = ltt_get_int64(reverse_byte_order, evD);
+ g_critical("getIntNumber : integer size %d unknown", size);
+ break;
+ }
+
+ return i;
+}
+#if 0
+/*****************************************************************************
+ *Function name
+ * getDataEndianType : get the data type size and endian type of the local
+ * machine
+ *Input params
+ * size : size of data type
+ * endian : endian type, little or big
+ ****************************************************************************/
+
+void getDataEndianType(LttArchSize * size, LttArchEndian * endian)
+{
+ int i = 1;
+ char c = (char) i;
+ int sizeInt=sizeof(int), sizeLong=sizeof(long), sizePointer=sizeof(void *);
+
+ if(c == 1) *endian = LTT_LITTLE_ENDIAN;
+ else *endian = LTT_BIG_ENDIAN;
+
+ if(sizeInt == 2 && sizeLong == 4 && sizePointer == 4)
+ *size = LTT_LP32;
+ else if(sizeInt == 4 && sizeLong == 4 && sizePointer == 4)
+ *size = LTT_ILP32;
+ else if(sizeInt == 4 && sizeLong == 8 && sizePointer == 8)
+ *size = LTT_LP64;
+ else if(sizeInt == 8 && sizeLong == 8 && sizePointer == 8)
+ *size = LTT_ILP64;
+ else *size = LTT_UNKNOWN;
+}
+#endif //0
+/* 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 start time of the trace */
+
+LttTime ltt_trace_system_description_trace_start_time(LttSystemDescription *s)
+{
+ return s->trace_start;
+}
+
+
+LttTracefile *ltt_tracefile_new()
+{
+ return g_new(LttTracefile, 1);
+}
+
+void ltt_tracefile_destroy(LttTracefile *tf)
+{
+ g_free(tf);
+}
+
+void ltt_tracefile_copy(LttTracefile *dest, const LttTracefile *src)
+{
+ *dest = *src;
+}
+
+/* Before library loading... */
+
+static void __attribute__((constructor)) init(void)
+{
+ LTT_FACILITY_NAME_HEARTBEAT = g_quark_from_string("heartbeat");
+ LTT_EVENT_NAME_HEARTBEAT = g_quark_from_string("heartbeat");
+
+ LTT_TRACEFILE_NAME_FACILITIES = g_quark_from_string("control/facilities");
+}
+