Debugging 调试gdb-列出正在使用的源目录
试图调试ada程序时，gdb似乎无法找到源代码。我确实确认了正在运行的可执行文件与刚才构建的相同。附加时，它会在控制台中显示以下内容，而不是将我带到源代码中的当前位置：Debugging 调试gdb-列出正在使用的源目录,debugging,gdb,ada,Debugging,Gdb,Ada,试图调试ada程序时，gdb似乎无法找到源代码。我确实确认了正在运行的可执行文件与刚才构建的相同。附加时，它会在控制台中显示以下内容，而不是将我带到源代码中的当前位置： (gdb) attach 804 0x0000003de620b68c in ?? () (gdb) frame 1 #1 0x0000000000000000 in ?? () (gdb) frame 0 #0 0x0000003de620b68c in ?? () 有没有办法让gdb告诉我它正在使用哪个源目录？或者是
(gdb) attach 804
0x0000003de620b68c in ?? ()
(gdb) frame 1
#1 0x0000000000000000 in ?? ()
(gdb) frame 0
#0 0x0000003de620b68c in ?? ()
GNAT Pro 6.4.2（20110614-45）。似乎您没有给gdb符号表，或者您的程序被剥离 当您附加到一个程序时，您应该告诉gdb您附加了什么可执行文件，以便它读取符号表。您应该使用-g（调试支持）编译程序，并确保链接过程不会删除符号。然后，按如下方式运行gdb：
gdb myprog -p 804
gdb myprog
GNU gdb (GDB) 7.10 for GNAT GPL 2017 [rev=gdb-7.10-ref-199-g7cfc608]
Copyright (C) 2015 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
See your support agreement for details of warranty and support.
If you do not have a current support agreement, then there is absolutely
no warranty for this version of GDB. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-pc-linux-gnu".
Type "show configuration" for configuration details.For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from prog...done.
(gdb) attach 804
Reading symbols from prog...(no debugging symbols found)...done.
(gdb) info sources
Source files for which symbols have been read in:
.../b__myprog.adb,
.../b__myprog.ads,
/build/eglibc-SvCtMH/eglibc-2.19/elf/rtld.c,
/build/eglibc-SvCtMH/eglibc-2.19/elf/../sysdeps/generic/_itoa.h,
/build/eglibc-SvCtMH/eglibc-2.19/elf/../sysdeps/unix/sysv/linux/dl-osinfo.h,
...
(gdb) info files
Symbols from "myprog".
Native process:
Using the running image of child Thread 0x7ffff7fb4780 (LWP 32214).
While running this, GDB does not access memory from...
Local exec file:
`myprog', file type elf64-x86-64.
Entry point: 0x40ac5e
0x0000000000400238 - 0x0000000000400254 is .interp
0x0000000000400254 - 0x0000000000400274 is .note.ABI-tag
0x0000000000400278 - 0x0000000000400cb4 is .hash
0x0000000000400cb8 - 0x0000000000403148 is .dynsym
0x0000000000403148 - 0x00000000004046b5 is .dynstr
0x00000000004046b6 - 0x00000000004049c2 is .gnu.version
...
似乎您没有给gdb符号表，或者您的程序被剥离了 当您附加到一个程序时，您应该告诉gdb您附加了什么可执行文件，以便它读取符号表。您应该使用-g（调试支持）编译程序，并确保链接过程不会删除符号。然后，按如下方式运行gdb：
gdb myprog -p 804
gdb myprog
GNU gdb (GDB) 7.10 for GNAT GPL 2017 [rev=gdb-7.10-ref-199-g7cfc608]
Copyright (C) 2015 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
See your support agreement for details of warranty and support.
If you do not have a current support agreement, then there is absolutely
no warranty for this version of GDB. Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-pc-linux-gnu".
Type "show configuration" for configuration details.For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from prog...done.
(gdb) attach 804
Reading symbols from prog...(no debugging symbols found)...done.
(gdb) info sources
Source files for which symbols have been read in:
.../b__myprog.adb,
.../b__myprog.ads,
/build/eglibc-SvCtMH/eglibc-2.19/elf/rtld.c,
/build/eglibc-SvCtMH/eglibc-2.19/elf/../sysdeps/generic/_itoa.h,
/build/eglibc-SvCtMH/eglibc-2.19/elf/../sysdeps/unix/sysv/linux/dl-osinfo.h,
...
(gdb) info files
Symbols from "myprog".
Native process:
Using the running image of child Thread 0x7ffff7fb4780 (LWP 32214).
While running this, GDB does not access memory from...
Local exec file:
`myprog', file type elf64-x86-64.
Entry point: 0x40ac5e
0x0000000000400238 - 0x0000000000400254 is .interp
0x0000000000400254 - 0x0000000000400274 is .note.ABI-tag
0x0000000000400278 - 0x0000000000400cb4 is .hash
0x0000000000400cb8 - 0x0000000000403148 is .dynsym
0x0000000000403148 - 0x00000000004046b5 is .dynstr
0x00000000004046b6 - 0x00000000004049c2 is .gnu.version
...
您似乎有一个比“不定位源”更基本的问题——GDB不知道您的进程在哪里。这很可能与您调用GDB的方式有关。请尝试使用
gdb-p804