--- /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>
+
+/* from marker.c */
+extern long marker_update_fields_offsets(struct marker_info *info, const char *data);
+
+/* 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)
+
+LttTrace *father_trace = NULL;
+
+/* 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);
+
+/* 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 3:
+ {
+ struct ltt_subbuffer_header_2_3 *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);
+ if(father_trace) {
+ t->start_freq = father_trace->start_freq;
+ t->freq_scale = father_trace->freq_scale;
+ } else {
+ father_trace = t;
+ }
+ 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(
+ (double)t->start_tsc
+ * 1000000000.0 * tf->trace->freq_scale
+ / (double)t->start_freq);
+ }
+ }
+ 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;
+}
+
+
+
+/*****************************************************************************
+ *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 */
+ ltt_subbuffer_header_t *header;
+ int page_size = getpagesize();
+
+ //open the file
+ tf->long_name = g_quark_from_string(fileName);
+ tf->trace = t;
+ 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;
+
+ if(parse_trace_header(header, tf, NULL)) {
+ g_warning("parse_trace_header error");
+ goto unmap_file;
+ }
+
+ //store the size of the file
+ tf->file_size = lTDFStat.st_size;
+ tf->buf_size = ltt_get_uint32(LTT_GET_BO(tf), &header->buf_size);
+ tf->num_blocks = tf->file_size / tf->buf_size;
+ tf->events_lost = 0;
+ tf->subbuf_corrupt = 0;
+
+ 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;
+
+ //read the first block
+ if(map_block(tf,0)) {
+ perror("Cannot map block for tracefile");
+ goto close_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);
+ }
+close_file:
+ close(tf->fd);
+end:
+ 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->buf_size))) {
+ g_warning("unmap size : %u\n",
+ PAGE_ALIGN(t->buf_size));
+ perror("munmap error");
+ g_assert(0);
+ }
+
+ close(t->fd);
+}
+
+/****************************************************************************
+ * 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)) {
+ 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;
+}
+
+/*
+ * Open a trace and return its LttTrace handle.
+ *
+ * pathname must be the directory of the trace
+ */
+
+LttTrace *ltt_trace_open(const gchar *pathname)
+{
+ 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);
+
+ /* Open all the tracefiles */
+ 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 metadata_0 tracefile.
+ * 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);
+ tf = &g_array_index (group, LttTracefile, 0);
+ header = (ltt_subbuffer_header_t *)tf->buffer.head;
+ ret = parse_trace_header(header, tf, t);
+ g_assert(!ret);
+
+ t->num_cpu = group->len;
+
+ //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)
+ 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;
+
+}
+
+/* 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));
+}
+
+/*
+ * 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);
+ 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;
+}
+
+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)) {
+ 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 */
+ high = block_num - 1;
+ } 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;
+}
+
+/* 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;
+}
+
+/* Given a TSC value, return the LttTime (seconds,nanoseconds) it
+ * corresponds to.
+ */
+
+LttTime ltt_interpolate_time_from_tsc(LttTracefile *tf, guint64 tsc)
+{
+ LttTime time;
+
+ if(tsc > tf->trace->start_tsc) {
+ time = ltt_time_from_uint64(
+ (double)(tsc - tf->trace->start_tsc)
+ * 1000000000.0 * tf->trace->freq_scale
+ / (double)tf->trace->start_freq);
+ time = ltt_time_add(tf->trace->start_time_from_tsc, time);
+ } else {
+ time = ltt_time_from_uint64(
+ (double)(tf->trace->start_tsc - tsc)
+ * 1000000000.0 * tf->trace->freq_scale
+ / (double)tf->trace->start_freq);
+ time = ltt_time_sub(tf->trace->start_time_from_tsc, time);
+ }
+ return time;
+}
+
+/* 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.index * ev->tracefile->buf_size)
+ + (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;
+
+ g_assert(block_num < tf->num_blocks);
+
+ if(tf->buffer.head != NULL) {
+ if(munmap(tf->buffer.head, PAGE_ALIGN(tf->buf_size))) {
+ g_warning("unmap size : %u\n",
+ PAGE_ALIGN(tf->buf_size));
+ perror("munmap error");
+ g_assert(0);
+ }
+ }
+
+ /* Multiple of pages aligned head */
+ tf->buffer.head = mmap(0,
+ PAGE_ALIGN(tf->buf_size),
+ PROT_READ, MAP_PRIVATE, tf->fd,
+ PAGE_ALIGN((off_t)tf->buf_size * (off_t)block_num));
+
+ 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.begin.freq = tf->trace->start_freq;
+
+ tf->buffer.begin.timestamp = ltt_interpolate_time_from_tsc(tf,
+ tf->buffer.begin.cycle_count);
+ tf->buffer.end.cycle_count = ltt_get_uint64(LTT_GET_BO(tf),
+ &header->cycle_count_end);
+ tf->buffer.end.freq = tf->trace->start_freq;
+
+ tf->buffer.lost_size = ltt_get_uint32(LTT_GET_BO(tf),
+ &header->lost_size);
+ tf->buffer.end.timestamp = ltt_interpolate_time_from_tsc(tf,
+ tf->buffer.end.cycle_count);
+ tf->buffer.tsc = tf->buffer.begin.cycle_count;
+ tf->event.tsc = tf->buffer.tsc;
+ tf->buffer.freq = tf->buffer.begin.freq;
+
+ /* 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->buf_size == ltt_get_uint32(LTT_GET_BO(tf),
+ &header->buf_size));
+
+ /* 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.index * ev->tracefile->buf_size)
+ + (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(marker_get_info_from_id(tf->mdata,
+ tf->event.event_id), tf->event.data);
+ }
+
+ 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->buf_size - tf->buffer.lost_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->buf_size - tf->buffer.lost_size) {
+ ret = ERANGE;
+ goto found;
+ }
+ g_assert(tf->event.offset < tf->buf_size - tf->buffer.lost_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");
+}
projects / lttv.git / blobdiff