我正在尝试使用 gdb 在服务启动时调试 sigsegv。我已经配置了 debuginfod，它甚至正在下载 debuginfo 但仍然显示？而不是符号。这是相关输出：
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Reading symbols from ./build/dns-wrapper...
(gdb) r
Starting program: /home/ncd/git/dns-wrapper/build/dns-wrapper --config-file config/config.ini
Downloading separate debug info for /lib64/ld-linux-x86-64.so.2
Downloading separate debug info for system-supplied DSO at 0x7ffff7fc5000
Downloading separate debug info for /usr/lib/libboost_system.so.1.86.0
Downloading separate debug info for /usr/lib/libboost_program_options.so.1.86.0
Downloading separate debug info for /usr/lib/libboost_log_setup.so.1.86.0
Downloading separate debug info for /usr/lib/libboost_log.so.1.86.0
Downloading separate debug info for /usr/lib/libboost_thread.so.1.86.0
Downloading separate debug info for /usr/lib/libboost_atomic.so.1.86.0
Downloading separate debug info for /usr/lib/libboost_chrono.so.1.86.0
Downloading separate debug info for /usr/lib/libboost_filesystem.so.1.86.0
Downloading separate debug info for /usr/lib/libm.so.6
Downloading separate debug info for /usr/lib/libc.so.6
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
Upstream server identified as: udp://1.1.1.1:53
Upstream server identified as: udp://8.8.8.8:53
[2024-09-28 18:53:39.662405] [0x00007ffff7d39940] [trace] [0x0008a1ea] [1] Dns Wrapper v0.0.0.1
[2024-09-28 18:53:39.662521] [0x00007ffff7d39940] [trace] [0x0008a1ea] [2] Git branch: win_raw_socket, Version: 01b16b2e-dirty, Commit: 01b16b2e-dirty, Date: 2024-09-28 10:24:37 +0530
[2024-09-28 18:53:39.662533] [0x00007ffff7d39940] [trace] [0x0008a1ea] [3] Current User: root
[2024-09-28 18:53:39.662540] [0x00007ffff7d39940] [trace] [0x0008a1ea] [4] Compiled for x86_64 (compiled locally) using cc (GCC) 14.2.1 20240910
[2024-09-28 18:53:39.662760] [0x00007ffff7d39940] [info] [0x0008a1ea] [5] Successfully read rules from file: ./rules.txt
[2024-09-28 18:53:39.662997] [0x00007ffff7d39940] [debug] [0x0008a1ea] [6] Skipping entering into daemon mode as per user request
[2024-09-28 18:53:39.663053] [0x00007ffff7d39940] [trace] [0x0008a1ea] [7] Daemon started on port: 10053
Program received signal SIGSEGV, Segmentation fault.
0x00005555555f43ed in boost::asio::detail::socket_ops::call_recvfrom<unsigned int> (s=8, data=0x7ffffffeab80, size=65535, flags=0, addr=0x7fffffffa740,
addrlen=0x7fffffffa890) at /usr/include/boost/asio/detail/impl/socket_ops.ipp:1130
1130 }
(gdb) where
#0 0x00005555555f43ed in boost::asio::detail::socket_ops::call_recvfrom<unsigned int> (s=8, data=0x7ffffffeab80, size=65535, flags=0, addr=0x7fffffffa740,
addrlen=0x7fffffffa890) at /usr/include/boost/asio/detail/impl/socket_ops.ipp:1130
#1 0x2851232006040001 in ?? ()
#2 0x00007fff0000fe51 in ?? ()
#3 0x0000000000000000 in ?? ()
(gdb) show debuginfod enabled
Debuginfod functionality is currently set to "on".
(gdb) show debuginfod urls
Debuginfod URLs are currently set to:
https://debuginfod.archlinux.org
(gdb) bt full
#0 0x00005555555f43ed in boost::asio::detail::socket_ops::call_recvfrom<unsigned int> (s=8, data=0x7ffffffeab80, size=65535, flags=0, addr=0x7fffffffa740,
addrlen=0x7fffffffa890) at /usr/include/boost/asio/detail/impl/socket_ops.ipp:1130
tmp_addrlen = 20
result = 561
#1 0x2851232006040001 in ?? ()
No symbol table info available.
#2 0x00007fff0000fe51 in ?? ()
No symbol table info available.
#3 0x0000000000000000 in ?? ()
No symbol table info available.
如您所见，gdb 下载了符号并且没有错误。但我还是看到了？？ () 在堆栈跟踪中。我的身边缺少什么吗？如何让 gdb 显示符号？
我像这样运行 gdb：
sudo DEBUGINFOD_URLS=https://debuginfod.archlinux.org gdb --args ./build/dns-wrapper --config-file config/config.ini以 root 身份运行它，因为服务需要 root 权限。
#0 0x00005555555f43ed in boost::asio::detail::socket_ops::call_recvfrom<unsigned int> (s=8, data=0x7ffffffeab80, size=65535, flags=0, addr=0x7fffffffa740, addrlen=0x7fffffffa890) at /usr/include/boost/asio/detail/impl/socket_ops.ipp:1130
#1 0x2851232006040001 in ?? ()
这通常意味着堆栈溢出（在
call_recvfrom()有什么建议如何进一步调试吗？
使用
-fsanitize=address