src/bin/lttng-sessiond/ust-registry-session-pid.cpp

   1 /*
   2  * Copyright (C) 2022 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   3  *
   4  * SPDX-License-Identifier: GPL-2.0-only
   5  *
   6  */
   7
   8 #include "ust-app.hpp"
   9 #include "ust-registry.hpp"
  10
  11 #include <common/exception.hpp>
  12
  13 namespace lst = lttng::sessiond::trace;
  14
  15 ust_registry_session_per_pid::ust_registry_session_per_pid(const struct ust_app& app,
  16                 const struct lst::abi& in_abi,
  17                 uint32_t major,
  18                 uint32_t minor,
  19                 const char *root_shm_path,
  20                 const char *shm_path,
  21                 uid_t euid,
  22                 gid_t egid,
  23                 uint64_t tracing_id) :
  24         ust_registry_session{in_abi, major, minor, root_shm_path, shm_path, euid, egid, tracing_id},
  25         _tracer_patch_level_version{app.version.patchlevel},
  26         _vpid{app.pid},
  27         _procname{app.name},
  28         _app_creation_time{app.registration_time}
  29 {
  30         lttng::pthread::lock_guard registry_lock(_lock);
  31         _generate_metadata();
  32 }
  33
  34 lttng_buffer_type ust_registry_session_per_pid::get_buffering_scheme() const noexcept
  35 {
  36         return LTTNG_BUFFER_PER_PID;
  37 }
  38
  39 void ust_registry_session_per_pid::_visit_environment(lst::trace_class_visitor& visitor) const
  40 {
  41         ust_registry_session::_visit_environment(visitor);
  42         visitor.visit(lst::environment_field<int64_t>("tracer_buffering_id", _vpid));
  43         visitor.visit(lst::environment_field<int64_t>(
  44                         "tracer_patchlevel", _tracer_patch_level_version));
  45         visitor.visit(lst::environment_field<int64_t>("vpid", _vpid));
  46         visitor.visit(lst::environment_field<std::string>("procname", _procname));
  47         visitor.visit(lst::environment_field<std::string>(
  48                         "vpid_datetime", lttng::utils::time_to_iso8601_str(_app_creation_time)));
  49 }