void perf_session__delete(struct perf_session *session)
{
perf_session__destroy_kernel_maps(session);
perf_session__delete_dead_threads(session);
perf_session__delete_threads(session);
perf_session_env__delete(&session->header.env);
machines__exit(&session->machines);
if (session->file)
perf_data_file__close(session->file);
free(session);
}
struct perf_session *perf_session__new(struct perf_data_file *file,
bool repipe, struct perf_tool *tool)
{
struct perf_session *session = zalloc(sizeof(*session));
if (!session)
goto out;
session->repipe = repipe;
INIT_LIST_HEAD(&session->ordered_samples.samples);
INIT_LIST_HEAD(&session->ordered_samples.sample_cache);
INIT_LIST_HEAD(&session->ordered_samples.to_free);
machines__init(&session->machines);
if (file) {
if (perf_data_file__open(file))
goto out_delete;
session->file = file;
if (perf_data_file__is_read(file)) {
if (perf_session__open(session) < 0)
goto out_close;
perf_session__set_id_hdr_size(session);
}
}
if (!file || perf_data_file__is_write(file)) {
/*
* In O_RDONLY mode this will be performed when reading the
* kernel MMAP event, in perf_event__process_mmap().
*/
if (perf_session__create_kernel_maps(session) < 0)
goto out_delete;
}
if (tool && tool->ordering_requires_timestamps &&
tool->ordered_samples && !perf_evlist__sample_id_all(session->evlist)) {
dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
tool->ordered_samples = false;
}
return session;
out_close:
perf_data_file__close(file);
out_delete:
perf_session__delete(session);
out:
return NULL;
}
