sessiond: return raw pointer to packet header

[lttng-tools.git] / src / bin / lttng-sessiond / ust-registry-session.cpp

diff --git a/src/bin/lttng-sessiond/ust-registry-session.cpp b/src/bin/lttng-sessiond/ust-registry-session.cpp
index 48983f2b21d8d4f3347ae63d784c766c9597160f..03a87e2868f98d4f36848e0f2f45d9f3a88e41c4 100644 (file)
--- a/src/bin/lttng-sessiond/ust-registry-session.cpp
+++ b/src/bin/lttng-sessiond/ust-registry-session.cpp
@@ -251,7 +251,8 @@ lsu::registry_session::registry_session(const struct lst::abi& in_abi,
        _metadata_generating_visitor{lttng::make_unique<ls::tsdl::trace_class_visitor>(
                        abi, [this](const std::string& fragment) {
                                _append_metadata_fragment(fragment);
-                       })}
+                       })},
+       _packet_header{_create_packet_header()}
 {
        pthread_mutex_init(&_lock, NULL);
        if (_shm_path.size() > 0) {
@@ -287,6 +288,44 @@ lsu::registry_session::registry_session(const struct lst::abi& in_abi,
        }
 }
 
+lst::type::cuptr lsu::registry_session::_create_packet_header() const
+{
+       lst::structure_type::fields packet_header_fields;
+
+       /* uint32_t magic */
+       packet_header_fields.emplace_back(lttng::make_unique<lst::field>("magic",
+                       lttng::make_unique<lst::integer_type>(abi.uint32_t_alignment,
+                                       abi.byte_order, 32, lst::integer_type::signedness::UNSIGNED,
+                                       lst::integer_type::base::HEXADECIMAL,
+                                       std::initializer_list<lst::integer_type::role>({lst::integer_type::role::PACKET_MAGIC_NUMBER}))));
+
+       /* uuid */
+       packet_header_fields.emplace_back(lttng::make_unique<lst::field>("uuid",
+                       lttng::make_unique<lst::static_length_blob_type>(0, 16,
+                                       std::initializer_list<lst::static_length_blob_type::role>({lst::static_length_blob_type::role::TRACE_CLASS_UUID}))));
+
+       /* uint32_t stream_id */
+       packet_header_fields.emplace_back(lttng::make_unique<lst::field>("stream_id",
+                       lttng::make_unique<lst::integer_type>(abi.uint32_t_alignment,
+                                       abi.byte_order, 32, lst::integer_type::signedness::UNSIGNED,
+                                       lst::integer_type::base::DECIMAL,
+                                       std::initializer_list<lst::integer_type::role>({lst::integer_type::role::DATA_STREAM_CLASS_ID}))));
+
+       /* uint64_t stream_instance_id */
+       packet_header_fields.emplace_back(lttng::make_unique<lst::field>("stream_instance_id",
+                       lttng::make_unique<lst::integer_type>(abi.uint64_t_alignment,
+                                       abi.byte_order, 64, lst::integer_type::signedness::UNSIGNED,
+                                       lst::integer_type::base::DECIMAL,
+                                       std::initializer_list<lst::integer_type::role>({lst::integer_type::role::DATA_STREAM_ID}))));
+
+       return lttng::make_unique<lst::structure_type>(0, std::move(packet_header_fields));
+}
+
+const lst::type *lsu::registry_session::get_packet_header() const noexcept
+{
+       return _packet_header.get();
+}
+
 /*
  * For a given enumeration in a registry, delete the entry and destroy
  * the enumeration.
@@ -665,39 +704,6 @@ lsu::registry_session::get_enumeration(const char *enum_name, uint64_t enum_id)
        return lsu::registry_enum::const_rcu_protected_reference{*reg_enum, std::move(rcu_lock)};
 }
 
-lst::type::cuptr lsu::registry_session::get_packet_header() const
-{
-       lst::structure_type::fields packet_header_fields;
-
-       /* uint32_t magic */
-       packet_header_fields.emplace_back(lttng::make_unique<lst::field>("magic",
-                       lttng::make_unique<lst::integer_type>(abi.uint32_t_alignment,
-                                       abi.byte_order, 32, lst::integer_type::signedness::UNSIGNED,
-                                       lst::integer_type::base::HEXADECIMAL,
-                                       std::initializer_list<lst::integer_type::role>({lst::integer_type::role::PACKET_MAGIC_NUMBER}))));
-
-       /* uuid */
-       packet_header_fields.emplace_back(lttng::make_unique<lst::field>("uuid",
-                       lttng::make_unique<lst::static_length_blob_type>(0, 16,
-                                       std::initializer_list<lst::static_length_blob_type::role>({lst::static_length_blob_type::role::TRACE_CLASS_UUID}))));
-
-       /* uint32_t stream_id */
-       packet_header_fields.emplace_back(lttng::make_unique<lst::field>("stream_id",
-                       lttng::make_unique<lst::integer_type>(abi.uint32_t_alignment,
-                                       abi.byte_order, 32, lst::integer_type::signedness::UNSIGNED,
-                                       lst::integer_type::base::DECIMAL,
-                                       std::initializer_list<lst::integer_type::role>({lst::integer_type::role::DATA_STREAM_CLASS_ID}))));
-
-       /* uint64_t stream_instance_id */
-       packet_header_fields.emplace_back(lttng::make_unique<lst::field>("stream_instance_id",
-                       lttng::make_unique<lst::integer_type>(abi.uint64_t_alignment,
-                                       abi.byte_order, 64, lst::integer_type::signedness::UNSIGNED,
-                                       lst::integer_type::base::DECIMAL,
-                                       std::initializer_list<lst::integer_type::role>({lst::integer_type::role::DATA_STREAM_ID}))));
-
-       return lttng::make_unique<lst::structure_type>(0, std::move(packet_header_fields));
-}
-
 /*
  * Lookup enumeration by name and comparing enumeration entries.
  * Needs to be called from RCU read-side critical section.