linktime_composition ASAN LeakSanitizer error

[y-okumura-isp]

We are working on ASAN errors.
test_linktime_composition looks to have several leaks.
They are almost from class_loader::impl::registerPlugin but one issue is from demos/composition/src/linktime_composition.cpp leak.

Bug report

Required Info:

• Operating System:
  • Ubuntu 20.04
• Installation type:
  • build
• Version or commit hash:
  • 77ae4ee
• DDS implementation:
  • cyclone_dds
• Client library (if applicable):
  • (NA)

Steps to reproduce issue

Build entire ROS2 according to https://github.com/colcon/colcon-sanitizer-reports/blob/master/README.rst.

$ colcon test
$ less latest_test/composition/stdout.log

or

$ cd build-asan/composition
$ launch_test test_linktime_composition__rmw_cyclonedds_cpp_Debug.py

We got the following log.
The first one, "Direct leak of 144", is from linktime_composition.cpp.
Others are from class_loader.

2: [test_linktime_composition-1] [INFO] [1610524687.528455323] [linktime_composition]: Load library 
2: [test_linktime_composition-1] [INFO] [1610524687.530394709] [linktime_composition]: Instantiate class rclcpp_components::NodeFactoryTemplate<composition::Client>
2: [test_linktime_composition-1] [INFO] [1610524687.745388818] [linktime_composition]: Instantiate class rclcpp_components::NodeFactoryTemplate<composition::Listener>
2: [test_linktime_composition-1] [INFO] [1610524687.800671413] [linktime_composition]: Instantiate class rclcpp_components::NodeFactoryTemplate<composition::Server>
2: [test_linktime_composition-1] [INFO] [1610524687.841303195] [linktime_composition]: Instantiate class rclcpp_components::NodeFactoryTemplate<composition::Talker>
2: [test_linktime_composition-1] [INFO] [1610524688.881379894] [talker]: Publishing: 'Hello World: 1'
2: [test_linktime_composition-1] [INFO] [1610524688.882102171] [listener]: I heard: [Hello World: 1]
2: [test_linktime_composition-1] [INFO] [1610524689.746876385] [Server]: Incoming request: [a: 2, b: 3]
2: [test_linktime_composition-1] [INFO] [1610524689.748097784] [Client]: Got result: [5]
2: [INFO] [test_linktime_composition-1]: sending signal 'SIGINT' to process[test_linktime_composition-1]
2: [test_linktime_composition-1] [INFO] [1610524689.752167060] [rclcpp]: signal_handler(signal_value=2)
2: [test_linktime_composition-1] 
2: [test_linktime_composition-1] =================================================================
2: [test_linktime_composition-1] ==15440==ERROR: LeakSanitizer: detected memory leaks
2: [test_linktime_composition-1] 
2: [test_linktime_composition-1] Direct leak of 144 byte(s) in 1 object(s) allocated from:
2: [test_linktime_composition-1]     #0 0x7f566d5b8947 in operator new(unsigned long) (/lib/x86_64-linux-gnu/libasan.so.5+0x10f947)
2: [test_linktime_composition-1]     #1 0x5560b2465afb in main src/ros2/demos/composition/src/linktime_composition.cpp:45
2: [test_linktime_composition-1]     #2 0x7f566c0e20b2 in __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x270b2)
2: [test_linktime_composition-1] 
2: [test_linktime_composition-1] Direct leak of 16 byte(s) in 1 object(s) allocated from:
2: [test_linktime_composition-1]     #0 0x7f566d5b8947 in operator new(unsigned long) (/lib/x86_64-linux-gnu/libasan.so.5+0x10f947)
2: [test_linktime_composition-1]     #1 0x7f566d110534 in void class_loader::impl::registerPlugin<rclcpp_components::NodeFactoryTemplate<composition::Server>, rclcpp_components::NodeFactory>(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) src/ros/class_loader/include/class_loader/class_loader_core.hpp:244
2: [test_linktime_composition-1]     #2 0x7f566d10cfce in ProxyExec0 src/ros2/demos/composition/src/server_component.cpp:53
2: [test_linktime_composition-1]     #3 0x7f566d10e8a9 in __static_initialization_and_destruction_0 src/ros2/demos/composition/src/server_component.cpp:53
2: [test_linktime_composition-1]     #4 0x7f566d10e8c8 in _GLOBAL__sub_I_server_component.cpp src/ros2/demos/composition/src/server_component.cpp:53
2: [test_linktime_composition-1]     #5 0x7f566df07b89  (/lib64/ld-linux-x86-64.so.2+0x11b89)

(snip, totally 4 leaks related with class_loader)

Expected behavior

no leak

Actual behavior

leaks, see above.