我有一个使用 Yocto 构建系统为 ARM 编译的应用程序，该应用程序崩溃并生成核心转储。
在目标上，我已经安装了 GDB 和我的应用程序 dbg ipk，我可以在 GDB 中加载核心转储文件并毫无问题地查看堆栈跟踪。
我希望能够在没有目标的情况下分析此核心转储。我尝试过使用 gdb-multiarch 但看不到堆栈跟踪的内容。
我可以从 dbg ipk 访问已安装的二进制文件和调试符号。 当我加载二进制 gdb-multiarch 日志时，它已从调试符号文件加载了符号，但我无法在堆栈跟踪中获取有效符号。
我不需要所有共享库的堆栈符号，仅需要来自我的应用程序。
有趣的是，如果我运行 gdb list，我可以看到 main.cpp 文件中的代码，但在崩溃时看不到代码。
# gdb-multiarch
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(gdb) file my_application
Reading symbols from my_application...
Reading symbols from .debug/my_application...
(gdb) core core-dump-file
warning: Can't open file /lib/libc-2.21.so during file-backed mapping note processing
warning: Can't open file /lib/libgcc_s.so.1 during file-backed mapping note processing
warning: Can't open file /lib/libm-2.21.so during file-backed mapping note processing
warning: Can't open file /lib/libstdc++.so.6.0.21 during file-backed mapping note processing
warning: Can't open file /usr/lib/libboost_system.so.1.60.0 during file-backed mapping note processing
warning: Can't open file /usr/lib/libboost_filesystem.so.1.60.0 during file-backed mapping note processing
warning: Can't open file /usr/lib/libcrypto.so.1.0.0 during file-backed mapping note processing
warning: Can't open file /usr/lib/libssl.so.1.0.0 during file-backed mapping note processing
warning: Can't open file /lib/librt-2.21.so during file-backed mapping note processing
warning: Can't open file /usr/lib/libjsoncpp.so.1.8.4 during file-backed mapping note processing
warning: Can't open file /lib/libpthread-2.21.so during file-backed mapping note processing
warning: Can't open file /lib/libatomic.so.1.1.0 during file-backed mapping note processing
warning: Can't open file /lib/libdl-2.21.so during file-backed mapping note processing
warning: Can't open file /lib/ld-2.21.so during file-backed mapping note processing
[New LWP 9334]
[New LWP 9344]
[New LWP 9346]
[New LWP 9347]
[New LWP 9348]
warning: Could not load shared library symbols for 14 libraries, e.g. /lib/libdl.so.2.
Use the "info sharedlibrary" command to see the complete listing.
Do you need "set solib-search-path" or "set sysroot"?
Core was generated by `/usr/sbin/my_application'.
Program terminated with signal SIGABRT, Aborted.
#0 0xb6aa0996 in ?? ()
[Current thread is 1 (LWP 9334)]
(gdb) bt
#0 0xb6aa0996 in ?? ()
#1 0xb6aae448 in ?? ()
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
(gdb) list
warning: Source file is more recent than executable.
13 #include ....
14 ......
..... shows code from the main.cpp in my application
15 ......
(gdb)
有什么方法可以使用 gdb-multiarch 查看堆栈跟踪的内容吗？
您应该尝试设置一个 sysroot，以便 GDB 可以找到它尝试加载的所有库。
创建一个类似
/tmp/sysroot/tmp/sysroot/lib/libc-2.21.so
/tmp/sysroot/lib/libgcc_s.so.1
... etc ...
然后在GDB中：
(gdb) set sysroot /tmp/sysroot
(gdb) file my_application
(gdb) core core-dump-file
如果幸运的话，GDB 现在应该从 sysroot 加载所有库，并且希望回溯符号将位于这些库之一中。