使用GDB分析core dump，进入yocto的编译目录。执行set sysroot，结果发现一个共享库都没有加载。
info sharedlibrary，直接没显示有共享库。
原来是可执行文件的版本和core dump的不匹配。
yuan@yuan-vm:/work/nas/minas/source/build/tmp/work/cortexa55-poky-linux/findex/1.0/src$ ${GDB} obj/findexd /work/core-findexd-121
GNU gdb (GDB) 14.2
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Reading symbols from obj/findexd...
warning: Can't open file /usr/bin/findexd during file-backed mapping note processing
warning: Can't open file /usr/lib/libpinyin.so during file-backed mapping note processing
warning: Can't open file /usr/lib/libname_sort.so during file-backed mapping note processing
warning: Can't open file /usr/lib/libgcc_s.so.1 during file-backed mapping note processing
warning: Can't open file /usr/lib/libstdc++.so.6.0.32 during file-backed mapping note processing
warning: Can't open file /usr/lib/libmitrigram.so during file-backed mapping note processing
warning: Can't open file /usr/lib/libcrypt.so.2.0.0 during file-backed mapping note processing
warning: Can't open file /usr/lib/libcap.so.2.69 during file-backed mapping note processing
warning: Can't open file /usr/lib/libnss_systemd.so.2 during file-backed mapping note processing
warning: Can't open file /usr/lib/libnss_compat.so.2 during file-backed mapping note processing
warning: Can't open file /usr/lib/libthumbnail.so during file-backed mapping note processing
warning: Can't open file /usr/lib/libshare_findex.so during file-backed mapping note processing
warning: Can't open file /usr/lib/librt.so.1 during file-backed mapping note processing
warning: Can't open file /usr/lib/libpthread.so.0 during file-backed mapping note processing
warning: Can't open file /usr/lib/libmediacenter.so during file-backed mapping note processing
warning: Can't open file /usr/lib/findex/libfileEvent.so during file-backed mapping note processing
warning: Can't open file /usr/lib/libdsync_findex.so during file-backed mapping note processing
warning: Can't open file /usr/lib/libalbum.so during file-backed mapping note processing
warning: Can't open file /usr/lib/libm.so.6 during file-backed mapping note processing
warning: Can't open file /usr/lib/libc.so.6 during file-backed mapping note processing
warning: Can't open file /usr/lib/libjson-c.so.5.3.0 during file-backed mapping note processing
warning: Can't open file /usr/lib/libfiletype.so during file-backed mapping note processing
warning: Can't open file /usr/lib/libsqlite3.so.0.8.6 during file-backed mapping note processing
warning: Can't open file /usr/lib/libnas.so during file-backed mapping note processing
warning: Can't open file /usr/lib/ld-linux-aarch64.so.1 during file-backed mapping note processing
warning: Can't open file /nas/sys/findex/findex-2d653acd8e3fdd13.db-shm during file-backed mapping note processing
[New LWP 905473]
Core was generated by `findexd -f'.
Program terminated with signal SIGABRT, Aborted.
#0 0x0000007fb4a71c3c in ?? ()
(gdb) info sharedlibrary
No shared libraries loaded at this time.
(gdb) set sysroot /work/rootfs-dev
(gdb)
此时使用一个假的可执行文件 obj/findexd2
$ ${GDB} obj/findexd2 /work/core-findexd-121
(gdb) info sharedlibrary
warning: Could not load shared library symbols for 24 libraries, e.g. /usr/lib/libnas.so.
Use the "info sharedlibrary" command to see the complete listing.
Do you need "set solib-search-path" or "set sysroot"?
From To Syms Read Shared Object Library
No /usr/lib/libnas.so
No /usr/lib/libsqlite3.so.0
No /usr/lib/libfiletype.so
No /usr/lib/libjson-c.so.5
No /usr/lib/libc.so.6
No /usr/lib/ld-linux-aarch64.so.1
No /usr/lib/libm.so.6
No /lib/findex/libalbum.so
No /lib/findex/libdsync_findex.so
No /lib/findex/libfileEvent.so
No /lib/findex/libmediacenter.so
No /usr/lib/libpthread.so.0
No /usr/lib/librt.so.1
No /lib/findex/libshare_findex.so
No /lib/findex/libthumbnail.so
No /usr/lib/libnss_compat.so.2
No /usr/lib/libnss_systemd.so.2
No /usr/lib/libcap.so.2
No /usr/lib/libcrypt.so.2
No /usr/lib/libmitrigram.so
No /usr/lib/libstdc++.so.6
No /usr/lib/libgcc_s.so.1
No /usr/lib/libname_sort.so
No /usr/lib/libpinyin.so
(gdb) set sysroot /work/rootfs-dev
warning: .dynamic section for "/work/rootfs-dev/usr/lib/libnas.so" is not at the expected address (wrong library or version mismatch?)
Reading symbols from /work/rootfs-dev/usr/lib/libnas.so...
(No debugging symbols found in /work/rootfs-dev/usr/lib/libnas.so)
Reading symbols from /work/rootfs-dev/usr/lib/libsqlite3.so.0...
(No debugging symbols found in /work/rootfs-dev/usr/lib/libsqlite3.so.0)
Reading symbols from /work/rootfs-dev/usr/lib/libfiletype.so...
(No debugging symbols found in /work/rootfs-dev/usr/lib/libfiletype.so)
Reading symbols from /work/rootfs-dev/usr/lib/libjson-c.so.5...
(No debugging symbols found in /work/rootfs-dev/usr/lib/libjson-c.so.5)
Reading symbols from /work/rootfs-dev/usr/lib/libc.so.6...
(No debugging symbols found in /work/rootfs-dev/usr/lib/libc.so.6)
Reading symbols from /work/rootfs-dev/usr/lib/ld-linux-aarch64.so.1...
(No debugging symbols found in /work/rootfs-dev/usr/lib/ld-linux-aarch64.so.1)
Reading symbols from /work/rootfs-dev/usr/lib/libm.so.6...
(No debugging symbols found in /work/rootfs-dev/usr/lib/libm.so.6)
Reading symbols from /work/rootfs-dev/usr/lib/libpthread.so.0...
(No debugging symbols found in /work/rootfs-dev/usr/lib/libpthread.so.0)
Reading symbols from /work/rootfs-dev/usr/lib/librt.so.1...
(No debugging symbols found in /work/rootfs-dev/usr/lib/librt.so.1)
Reading symbols from /work/rootfs-dev/usr/lib/libnss_compat.so.2...
(No debugging symbols found in /work/rootfs-dev/usr/lib/libnss_compat.so.2)
Reading symbols from /work/rootfs-dev/usr/lib/libnss_systemd.so.2...
(No debugging symbols found in /work/rootfs-dev/usr/lib/libnss_systemd.so.2)
Reading symbols from /work/rootfs-dev/usr/lib/libcap.so.2...
(No debugging symbols found in /work/rootfs-dev/usr/lib/libcap.so.2)
Reading symbols from /work/rootfs-dev/usr/lib/libcrypt.so.2...
(No debugging symbols found in /work/rootfs-dev/usr/lib/libcrypt.so.2)
warning: .dynamic section for "/work/rootfs-dev/usr/lib/libmitrigram.so" is not at the expected address (wrong library or version mismatch?)
Reading symbols from /work/rootfs-dev/usr/lib/libmitrigram.so...
(No debugging symbols found in /work/rootfs-dev/usr/lib/libmitrigram.so)
Reading symbols from /work/rootfs-dev/usr/lib/libstdc++.so.6...
(No debugging symbols found in /work/rootfs-dev/usr/lib/libstdc++.so.6)
Reading symbols from /work/rootfs-dev/usr/lib/libgcc_s.so.1...
(No debugging symbols found in /work/rootfs-dev/usr/lib/libgcc_s.so.1)
Reading symbols from /work/rootfs-dev/usr/lib/libname_sort.so...
(No debugging symbols found in /work/rootfs-dev/usr/lib/libname_sort.so)
warning: .dynamic section for "/work/rootfs-dev/usr/lib/libpinyin.so" is not at the expected address (wrong library or version mismatch?)
Reading symbols from /work/rootfs-dev/usr/lib/libpinyin.so...
(No debugging symbols found in /work/rootfs-dev/usr/lib/libpinyin.so)
(gdb)