X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fust-registry-session.cpp;h=03a87e2868f98d4f36848e0f2f45d9f3a88e41c4;hb=0267b5278de7bf4ee1ec11f2270dec4b44e80f36;hp=5bb8e6094e43726d93f7dc503e3a66dd39415de8;hpb=f139a4f9cdbea2b08d08b024ad0996fb5bebad41;p=lttng-tools.git

diff --git a/src/bin/lttng-sessiond/ust-registry-session.cpp b/src/bin/lttng-sessiond/ust-registry-session.cpp
index 5bb8e6094..03a87e286 100644
--- a/src/bin/lttng-sessiond/ust-registry-session.cpp
+++ b/src/bin/lttng-sessiond/ust-registry-session.cpp
@@ -29,6 +29,7 @@
 
 #include <fcntl.h>
 #include <functional>
+#include <initializer_list>
 #include <mutex>
 #include <sstream>
 #include <string>
@@ -240,16 +241,18 @@ lsu::registry_session::registry_session(const struct lst::abi& in_abi,
 	lst::trace_class(in_abi, generate_uuid_or_throw()),
 	_root_shm_path{root_shm_path ? root_shm_path : ""},
 	_shm_path{shm_path ? shm_path : ""},
-	_metadata_path{_shm_path.size() > 0 ?
-			fmt::format("{}/metadata", _shm_path) : std::string("")},
+	_metadata_path{_shm_path.size() > 0 ? fmt::format("{}/metadata", _shm_path) :
+						    std::string("")},
 	_uid{euid},
 	_gid{egid},
 	_app_tracer_version{.major = major, .minor = minor},
 	_tracing_id{tracing_id},
-	_metadata_generating_visitor{lttng::make_unique<ls::tsdl::trace_class_visitor>(abi,
-			[this](const std::string& fragment) {
+	_clock{lttng::make_unique<lsu::clock_class>()},
+	_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) {
@@ -285,6 +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.
@@ -389,7 +430,7 @@ void lsu::registry_session::add_channel(uint64_t key)
 	}
 
 	auto chan = new lsu::registry_channel(
-			_get_next_channel_id(),
+			_get_next_channel_id(), abi, _clock->name,
 			/* Registered channel listener. */
 			[this](const lsu::registry_channel& registered_channel) {
 				/*
@@ -487,7 +528,7 @@ void lsu::registry_session::_visit_environment(
 void lsu::registry_session::_accept_on_clock_classes(lst::trace_class_visitor& visitor) const
 {
 	ASSERT_LOCKED(_lock);
-	_clock.accept(visitor);
+	_clock->accept(visitor);
 }
 
 void lsu::registry_session::_accept_on_stream_classes(lst::trace_class_visitor& visitor) const
@@ -613,6 +654,9 @@ void lsu::registry_session::regenerate_metadata()
 {
 	lttng::pthread::lock_guard registry_lock(_lock);
 
+	/* Resample the clock */
+	_clock = lttng::make_unique<lsu::clock_class>();
+
 	_metadata_version++;
 	_reset_metadata();
 	_generate_metadata();