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