# 시뮬레이션 디버깅
호스트 시스템에서 시뮬레이션이 실행 중이므로, 데스크탑 개발 도구를 사용할 수 있습니다.
# CLANG 주소 새니타이저(Mac OS, Linux)
Clang 주소 새니타이저는 정렬(버스) 오류 및 분할 오류와 같은 기타 메모리 오류를 찾는 데 도움이 됩니다. 아래 명령은 올바른 컴파일 옵션을 설정합니다.
make clean # only required on first address sanitizer run after a normal build
PX4_ASAN=1 make px4_sitl jmavsim
# Valgrind
brew install valgrind
또는
sudo apt-get install valgrind
SITL 시뮬레이션 중에 valgrind를 사용하려면:
make px4_sitl_default jmavsim___valgrind
# Launch Gazebo Classic SITL Without Debugger
By default SITL is launched without a debugger attached when using any simulator backend:
make px4_sitl_default gz
make px4_sitl_default gazebo-classic
make px4_sitl_default jmavsim
For Gazebo Classic (only) you can also start the simulator with a debugger attached. Note however, that you must provide the vehicle type in the simulator target, as shown below:
make px4_sitl_default gazebo-classic_iris_gdb
make px4_sitl_default gazebo-classic_iris_lldb
This will start the debugger and launch the SITL application with Gazebo and the Iris simulator. 디버거 셸에서 실행을 중지하려면 CTRL-C
를 입력합니다.
Process 16529 stopped
* thread #1: tid = 0x114e6d, 0x00007fff90f4430a libsystem_kernel.dylib`__read_nocancel + 10, name = 'px4', queue = 'com.apple.main-thread', stop reason = signal SIGSTOP
frame #0: 0x00007fff90f4430a libsystem_kernel.dylib`__read_nocancel + 10
libsystem_kernel.dylib`__read_nocancel:
-> 0x7fff90f4430a <+10>: jae 0x7fff90f44314 ; <+20>
0x7fff90f4430c <+12>: movq %rax, %rdi
0x7fff90f4430f <+15>: jmp 0x7fff90f3fc53 ; cerror_nocancel
0x7fff90f44314 <+20>: retq
(lldb)
DriverFrameworks 스케줄링이 디버깅 세션을 방해하지 않도록 하려면, SIGCONT
를 LLDB 및 GDB에서 마스킹합니다.
(lldb) process handle SIGCONT -n false -p false -s false
또는 GDB의 경우:
(gdb) handle SIGCONT noprint nostop
그 후 lldb 또는 gdb 셸은 일반 세션처럼 작동합니다. LLDB/GDB 문서를 참고하십시오.
마지막 매개변수인 <viewer_model_debugger> 트리플렛은 실제로 빌드 디렉토리에서 make에 전달되므로
make px4_sitl_default gazebo-classic_iris_gdb
명령은 다음 명령과 같습니다.
make px4_sitl_default # Configure with cmake
make -C build/px4_sitl_default classic_iris_gdb
A full list of the available make targets in the build directory can be obtained with:
make help
# Attaching GDB to running SITL
You can also start your simulation, and then attach gdb
:
In one terminal screen enter the command to start your simulation:
make px4_sitl_default gazebo-classic
As the script runs, note the SITL COMMAND: output text located right above the large "PX4" text. It will list the location of your px4 bin file for later use.
SITL COMMAND: "<px4 bin file>" "<build dir>"/etc ______ __ __ ___ | ___ \ \ \ / / / | | |_/ / \ V / / /| | | __/ / \ / /_| | | | / /^\ \ \___ | \_| \/ \/ |_/ px4 starting. INFO [px4] startup script: /bin/sh etc/init.d-posix/rcS 0 INFO [init] found model autostart file as SYS_AUTOSTART=10015
Open another terminal and type:
ps -a
You will want to note the PID of the process named "PX4"
(In this example it is 14149)
atlas:~/px4/main/PX4-Autopilot$ ps -a PID TTY TIME CMD 1796 tty2 00:01:59 Xorg 1836 tty2 00:00:00 gnome-session-b 14027 pts/1 00:00:00 make 14077 pts/1 00:00:00 sh 14078 pts/1 00:00:00 cmake 14079 pts/1 00:00:00 ninja 14090 pts/1 00:00:00 sh 14091 pts/1 00:00:00 bash 14095 pts/1 00:01:23 gzserver 14149 pts/1 00:02:48 px4 14808 pts/2 00:00:00 ps
Then type in the same window
sudo gdb [px4 bin file path (from step 1) here]
예를 들어,
sudo gdb /home/atlas/px4/base/PX4-Autopilot/build/px4_sitl_default/bin/px4
Now, you can attach to the PX4 instance by entering the PID noted in step 2.
attach [PID on px4]
You should now have a GDB interface to debug with.
# 컴파일러 최적화
It is possible to suppress compiler optimization for given executables and/or modules (as added by cmake with add_executable
or add_library
) when configuring for posix_sitl_*
. This can be handy when it is necessary to step through code with a debugger or print variables that would otherwise be optimized out.
To do so, set the environment variable PX4_NO_OPTIMIZATION
to be a semi-colon separated list of regular expressions that match the targets that need to be compiled without optimization. This environment variable is ignored when the configuration isn't posix_sitl_*
.
예를 들어,
export PX4_NO_OPTIMIZATION='px4;^modules__uORB;^modules__systemlib$'
대상의 최적화를 억제합니다: 플랫폼__posix__px4_layer, modules__systemlib, modules__uORB, 예제__px4_simple_app, modules__uORB__uORB \_tests 및 px4.
The targets that can be matched with these regular expressions can be printed with the command:
make -C build/posix_sitl_* list_cmake_targets