static void group_time_span_get(GQuark name, gpointer data, gpointer user_data);
static gint map_block(LttTracefile * tf, guint block_num);
static void ltt_update_event_size(LttTracefile *tf);
+static LttTrace *_ltt_trace_open(const gchar *pathname, gboolean is_live);
+static int ltt_tracefile_update(LttTracefile *tf);
+static void update_tracefile_group(GQuark name, gpointer data, gpointer user_data);
/* Enable event debugging */
static int a_event_debug = 0;
return 0;
}
-int ltt_trace_create_block_index(LttTracefile *tf)
+static int ltt_trace_update_block_index(LttTracefile *tf, uint64_t offset,
+ unsigned long firstBlock)
{
- int page_size = getpagesize();
- uint64_t offset = 0;
- unsigned long i = 0;
- unsigned int header_map_size = PAGE_ALIGN(ltt_subbuffer_header_size());
-
- tf->buf_index = g_array_sized_new(FALSE, TRUE, sizeof(uint64_t),
- DEFAULT_N_BLOCKS);
-
- g_assert(tf->buf_index->len == i);
+ int i = firstBlock;
+ int page_size = getpagesize();
+ unsigned int header_map_size = PAGE_ALIGN(ltt_subbuffer_header_size());
+ g_assert(tf->buf_index->len == i);
while (offset < tf->file_size) {
ltt_subbuffer_header_t *header;
uint64_t *off;
-
- tf->buf_index = g_array_set_size(tf->buf_index, i + 1);
- off = &g_array_index(tf->buf_index, uint64_t, i);
- *off = offset;
+ uint64_t size;
/* map block header */
header = mmap(0, header_map_size, PROT_READ,
}
/* read len, offset += len */
- offset += ltt_get_uint32(LTT_GET_BO(tf), &header->sb_size);
+ size = ltt_get_uint32(LTT_GET_BO(tf), &header->sb_size);
+ /* Only index completly writen blocks */
+ if (offset + size <= tf->file_size) {
+
+ tf->buf_index = g_array_set_size(tf->buf_index, i + 1);
+ off = &g_array_index(tf->buf_index, uint64_t, i);
+ *off = offset;
+
+ /* Store current buffer end cycle as the last file timestamp */
+ /* TODO ybrosseau 2010-11-04: Might want to convert it to a LttTime */
+ tf->end_timestamp = ltt_get_uint64(LTT_GET_BO(tf),
+ &header->cycle_count_end);
+
+ ++i;
+ }
+ offset += size;
/* unmap block header */
if(munmap(header, header_map_size)) {
g_warning("unmap size : %u\n", header_map_size);
perror("munmap error");
return -1;
}
- ++i;
}
tf->num_blocks = i;
return 0;
}
+/* parse the new information from the file and reajust the number of blocks.
+ *
+ * Return value : 0 success, -1 error
+ */
+int ltt_trace_continue_block_index(LttTracefile *tf)
+{
+ int ret;
+ uint64_t offset;
+ uint32_t last_block_size;
+ unsigned long i = tf->num_blocks;
+ int page_size = getpagesize();
+ unsigned int header_map_size = PAGE_ALIGN(ltt_subbuffer_header_size());
+
+ get_block_offset_size(tf, tf->num_blocks-1, &offset, &last_block_size);
+
+ ltt_subbuffer_header_t *header_tmp = mmap(0, header_map_size, PROT_READ,
+ MAP_PRIVATE, tf->fd, (off_t)offset);
+ if(header_tmp == MAP_FAILED) {
+ perror("Error in allocating memory for buffer of tracefile");
+ return -1;
+ }
+
+ /* read len, offset += len */
+ offset += ltt_get_uint32(LTT_GET_BO(tf), &header_tmp->sb_size);
+
+ ret = ltt_trace_update_block_index(tf, offset, i);
+
+ return ret;
+}
+
+int ltt_trace_create_block_index(LttTracefile *tf)
+{
+ int ret;
+ uint64_t offset = 0;
+ unsigned long i = 0;
+
+ tf->buf_index = g_array_sized_new(FALSE, TRUE, sizeof(uint64_t),
+ DEFAULT_N_BLOCKS);
+ if(!tf->buf_index)
+ return -1;
+ ret = ltt_trace_update_block_index(tf, offset, i);
+ return ret;
+}
+
+/*
+ Read file header and initialise buffer indexes
+
+ Return value : 0 for success, -1 otherwise.
+*/
+static int ltt_tracefile_init(LttTracefile *tf)
+{
+ ltt_subbuffer_header_t *header;
+ int page_size = getpagesize();
+
+ /* Temporarily map the buffer start header to get trace information */
+ /* Multiple of pages aligned head */
+ tf->buffer.head = mmap(0,
+ PAGE_ALIGN(ltt_subbuffer_header_size()), PROT_READ,
+ MAP_PRIVATE, tf->fd, 0);
+ if(tf->buffer.head == MAP_FAILED) {
+ perror("Error in allocating memory for buffer of tracefile");
+ goto unmap_file;
+ }
+ g_assert( ( (gulong)tf->buffer.head&(8-1) ) == 0); // make sure it's aligned.
+
+ header = (ltt_subbuffer_header_t *)tf->buffer.head;
+
+ if(parse_trace_header(header, tf, tf->trace))
+ {
+ g_warning("parse_trace_header error");
+ goto unmap_file;
+ }
+
+ if(munmap(tf->buffer.head,
+ PAGE_ALIGN(ltt_subbuffer_header_size())))
+ {
+ g_warning("unmap size : %zu\n",
+ PAGE_ALIGN(ltt_subbuffer_header_size()));
+ perror("munmap error");
+ g_assert(0);
+ }
+ tf->buffer.head = NULL;
+
+ /* Create fields offset table */
+ tf->event.fields_offsets = g_array_sized_new(FALSE, FALSE,
+ sizeof(struct LttField), 1);
+ if (!tf->event.fields_offsets) {
+ g_warning("Cannot create fields offset table");
+ goto unmap_file;
+ }
+
+ /* Create block index */
+ ltt_trace_create_block_index(tf);
+
+ if(map_block(tf,0))
+ {
+ perror("Cannot map block for tracefile");
+ goto unmap_file;
+ }
+ return 0;
+ /* Error */
+unmap_file:
+ if(munmap(tf->buffer.head,
+ PAGE_ALIGN(ltt_subbuffer_header_size()))) {
+ g_warning("unmap size : %zu\n",
+ PAGE_ALIGN(ltt_subbuffer_header_size()));
+ perror("munmap error");
+ g_assert(0);
+ }
+ return -1;
+}
+
/*****************************************************************************
*Function name
* ltt_tracefile_open : open a trace file, construct a LttTracefile
*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);
tf->buf_index = NULL;
+ tf->num_blocks = 0;
if(tf->fd < 0){
g_warning("Unable to open input data file %s\n", fileName);
goto end;
}
-
+
// Get the file's status
if(fstat(tf->fd, &lTDFStat) < 0){
g_warning("Unable to get the status of the input data file %s\n", fileName);
goto close_file;
}
-
- // 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->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;
-
- /* Create block index */
- ltt_trace_create_block_index(tf);
-
- //read the first block
- if(map_block(tf,0)) {
- perror("Cannot map block for tracefile");
- goto close_file;
+ tf->event.fields_offsets = NULL;
+
+ /* Is the file large enough to contain a trace */
+ if(lTDFStat.st_size < (off_t)(ltt_subbuffer_header_size())){
+ if (t->is_live) {
+ /* It a live trace so the file can be empty at the start of the analysis */
+ goto end;
+ } else {
+ g_print("The input data file %s does not contain a trace\n", fileName);
+ goto close_file;
+ }
+ }
+
+ if(ltt_tracefile_init(tf) < 0) {
+ goto close_file;
}
-
- /* Create fields offset table */
- tf->event.fields_offsets = g_array_sized_new(FALSE, FALSE,
- sizeof(struct LttField), 1);
- if (!tf->event.fields_offsets)
- 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,
close(t->fd);
if (t->buf_index)
g_array_free(t->buf_index, TRUE);
- g_array_free(t->event.fields_offsets, TRUE);
+ if (t->event.fields_offsets) {
+ g_array_free(t->event.fields_offsets, TRUE);
+ }
}
/****************************************************************************
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);
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 ? */
+ /* Only consider the error for non live trace */
+ if (!trace->is_live) {
+
+ g_info("Error opening tracefile %s", path);
+ continue; /* error opening the tracefile : bad magic number ? */
+ }
}
g_debug("Tracefile name is %s and number is %u",
return err;
}
+
+LttTrace *ltt_trace_open(const gchar *pathname)
+{
+ return _ltt_trace_open(pathname, FALSE);
+}
+
+LttTrace *ltt_trace_open_live(const gchar *pathname)
+{
+ return _ltt_trace_open(pathname, TRUE);
+}
+
/*
* Open a trace and return its LttTrace handle.
*
* pathname must be the directory of the trace
*/
-LttTrace *ltt_trace_open(const gchar *pathname)
+static LttTrace *_ltt_trace_open(const gchar *pathname, gboolean is_live)
{
gchar abs_path[PATH_MAX];
LttTrace * t;
}
}
closedir(dir);
-
+
+ t->is_live = is_live;
+ t->live_safe_timestamp = ltt_time_zero;
+
/* Open all the tracefiles */
t->start_freq= 0;
if(open_tracefiles(t, abs_path, "")) {
}
/*
- * Get the trace information for the metadata_0 tracefile.
+ * Get the trace information for the first valid metadata tracefile.
+ * In live trace mode, the metadata_0 might be empty
* Getting a correct trace start_time and start_tsc is insured by the fact
* that no subbuffers are supposed to be lost in the metadata channel.
* Therefore, the first subbuffer contains the start_tsc timestamp in its
* buffer header.
*/
g_assert(group->len > 0);
- tf = &g_array_index (group, LttTracefile, 0);
- header = (ltt_subbuffer_header_t *)tf->buffer.head;
+ header = NULL;
+ for(i=0; i<group->len; i++) {
+ tf = &g_array_index (group, LttTracefile, i);
+ header = (ltt_subbuffer_header_t *)tf->buffer.head;
+ if (header) {
+ break;
+ }
+ }
+ if (header == NULL) {
+ g_warning("Trace %s has not one valid metadata tracefile", abs_path);
+ goto find_error;
+ }
+
ret = parse_trace_header(header, tf, t);
g_assert(!ret);
for(i=0; i<group->len; i++) {
tf = &g_array_index (group, LttTracefile, i);
- if (tf->cpu_online)
+ if (tf->cpu_online && tf->buffer.head )
if(ltt_process_metadata_tracefile(tf))
goto find_error;
// goto metadata_error;
}
+
+/*****************************************************************************
+ Update the informations concerning the tracefile
+
+ Must be called periodically to update trace file and file size
+ information.
+
+Input params
+ tf : the tracefile
+Return value
+ : Number of tracefile with available events
+ -1 on error.
+ ****************************************************************************/
+int ltt_trace_update(LttTrace *trace)
+{
+ int trace_updated_count = 0;
+
+ /* Only update live traces */
+ if(trace->is_live) {
+
+ /* Iterate on all tracefiles */
+ g_datalist_foreach(&trace->tracefiles,
+ &update_tracefile_group,
+ &trace_updated_count);
+
+ return trace_updated_count;
+ }
+ return 0;
+
+}
+
+static void update_tracefile_group(GQuark name, gpointer data, gpointer user_data)
+{
+ int *trace_updated_count = (int *)user_data;
+ unsigned int i;
+ LttTracefile *tf;
+ GArray *group = (GArray *)data;
+
+ g_debug("Updating tracefile group %s", g_quark_to_string(name));
+ for(i=0; i<group->len; i++) {
+ tf = &g_array_index (group, LttTracefile, i);
+
+ /* Update safe timestamp */
+ tf->trace->live_safe_timestamp =
+ LTT_TIME_MAX(tf->trace->live_safe_timestamp,
+ ltt_interpolate_time_from_tsc(tf,
+ tf->end_timestamp));
+
+ /* Update tracefile */
+ int ret = ltt_tracefile_update(tf);
+ if(ret < 0) {
+ g_warning("LIVE: Cannot update tracefile %s",
+ g_quark_to_string(ltt_tracefile_long_name(tf)));
+ *trace_updated_count = -1;
+ break;
+ } else {
+ *trace_updated_count += 1;
+ }
+ }
+}
+
+
+/*****************************************************************************
+ *Function name
+ * ltt_tracefile_update : Update the informations concerning a tracefile
+ * Must be called periodically to update trace file and file size
+ information.
+ *Input params
+ * tf : the tracefile
+ *Return value
+ * : 1 for success and an event is available
+ 0 for success but no event available,
+ * -1 on error.
+ ****************************************************************************/
+static int ltt_tracefile_update(LttTracefile *tf)
+{
+ struct stat lTDFStat; /* Trace data file status */
+ if(fstat(tf->fd, &lTDFStat) < 0){
+ perror("error in getting the tracefile informations.");
+ }
+
+
+ /* Process the file only on size change */
+ if(tf->file_size < lTDFStat.st_size) {
+ /* Update the size of the file */
+ tf->file_size = lTDFStat.st_size;
+ g_debug("Updating tracefile %s", g_quark_to_string(tf->long_name));
+
+ if( tf->file_size >= (off_t)(ltt_subbuffer_header_size()) ) {
+
+ if(tf->buf_index == NULL) {
+ if(ltt_tracefile_init(tf) < 0) {
+ return -1;
+ }
+ if(tf->name == LTT_TRACEFILE_NAME_METADATA) {
+
+ LttTime start;
+ start.tv_sec = 0;
+ start.tv_nsec = 0;
+ ltt_process_metadata_tracefile(tf);
+
+ ltt_tracefile_seek_time(tf, start);
+ tf->event.offset = 0;
+
+ }
+ }
+ else
+ {
+ /* Retrieve the new subbuffers and index them */
+ ltt_trace_continue_block_index(tf);
+
+ if(tf->name == LTT_TRACEFILE_NAME_METADATA) {
+ LttEventPosition *pos = ltt_event_position_new();
+ ltt_tracefile_get_current_position(tf, pos);
+ ltt_process_metadata_tracefile(tf);
+ ltt_tracefile_seek_position(tf, pos);
+ g_free(pos);
+
+ }
+ }
+
+ return 1;
+ }
+ }
+
+ return 0;
+
+}
+
/* Open another, completely independant, instance of a trace.
*
* A read on this new instance will read the first event of the trace.
*/
LttTrace *ltt_trace_copy(LttTrace *self)
{
- return ltt_trace_open(g_quark_to_string(self->pathname));
+ return _ltt_trace_open(g_quark_to_string(self->pathname), self->is_live);
}
/*
LttTime *start, LttTime *end)
{
int err;
+
err = map_block(tf, 0);
- if(unlikely(err)) {
+ /* Only empty live traces will return ERANGE */
+ if(err == ERANGE) {
+ *start = ltt_time_infinite;
+ *end = ltt_time_zero;
+ return;
+ } else if(unlikely(err)) {
g_error("Can not map block");
*start = ltt_time_infinite;
} else
/* seek at the beginning of trace */
err = map_block(tf, 0); /* First block */
- if(unlikely(err)) {
+ if(unlikely(err == ERANGE)) {
+ goto range;
+ } else if(unlikely(err)) {
g_error("Can not map block");
goto fail;
}
return EPERM;
}
+
+/* Save the current tracefile position in the passed position pointer */
+int ltt_tracefile_get_current_position(const LttTracefile *tf, LttEventPosition *ep)
+{
+ /* TODO ybrosseau 2011-06-07: Maybe add some error checking
+ (ex: check the validity of the arguments pointer) */
+ ltt_event_position(&(tf->event), ep);
+ return 0;
+}
+
+
/* Seek to a position indicated by an LttEventPosition
*/
return &tf->event;
}
-
-
/*****************************************************************************
*Function name
* ltt_tracefile_read : Read the next event in the tracefile
uint32_t size;
int ret;
+ if(tf->num_blocks == 0) {
+ errno = ERANGE;
+ return ERANGE;
+ }
+
g_assert(block_num < tf->num_blocks);
if(tf->buffer.head != NULL) {
pos += (size_t)tf->event.data_size;
tf->event.offset = pos - tf->buffer.head;
-
- if(tf->event.offset == tf->buffer.data_size) {
+
+ if(tf->event.offset >= tf->buffer.data_size) {
ret = ERANGE;
goto found;
}
while((entry = readdir(dir)) != NULL) {
if(entry->d_name[0] == '.') continue;
- if(g_strcmp0(entry->d_name, "metadata_0") != 0) continue;
+ if(g_str_has_prefix(entry->d_name, "metadata_") != 0) continue;
strcpy(path, abs_path);
strcat(path, "/");
version_number->ltt_major_version = header->major_version;
version_number->ltt_minor_version = header->minor_version;
+
+ return 1;
}
- return 0;
+ return -1;
open_error:
g_free(t);
projects / lttv.git / blobdiff