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-session-pid.hpp"
  10
  11 #include <common/exception.hpp>
  12 #include <lttng/trace-format-descriptor-internal.hpp>
  13
  14 namespace lst = lttng::sessiond::trace;
  15 namespace lsu = lttng::sessiond::ust;
  16
  17 lsu::registry_session_per_pid::registry_session_per_pid(const struct ust_app& app,
  18                 const struct lst::abi& in_abi,
  19                 uint32_t major,
  20                 uint32_t minor,
  21                 const char *root_shm_path,
  22                 const char *shm_path,
  23                 uid_t euid,
  24                 gid_t egid,
  25                 uint64_t tracing_id,
  26                 const lttng::trace_format_descriptor& trace_format) :
  27         registry_session{in_abi, major, minor, root_shm_path, shm_path, euid, egid, tracing_id,
  28                         trace_format},
  29         _tracer_patch_level_version{app.version.patchlevel},
  30         _vpid{app.pid},
  31         _procname{app.name},
  32         _app_creation_time{app.registration_time}
  33 {
  34         lttng::pthread::lock_guard registry_lock(_lock);
  35         _generate_metadata();
  36 }
  37
  38 lttng_buffer_type lsu::registry_session_per_pid::get_buffering_scheme() const noexcept
  39 {
  40         return LTTNG_BUFFER_PER_PID;
  41 }
  42
  43 void lsu::registry_session_per_pid::accept(lst::trace_class_environment_visitor& visitor) const
  44 {
  45         registry_session::accept(visitor);
  46         visitor.visit(lst::environment_field<int64_t>("tracer_buffering_id", _vpid));
  47         visitor.visit(lst::environment_field<int64_t>(
  48                         "tracer_patchlevel", _tracer_patch_level_version));
  49         visitor.visit(lst::environment_field<int64_t>("vpid", _vpid));
  50         visitor.visit(lst::environment_field<std::string>("procname", _procname));
  51         visitor.visit(lst::environment_field<std::string>(
  52                         "vpid_datetime", lttng::utils::time_to_iso8601_str(_app_creation_time)));
  53 }