显示cdir值

Question

当我尝试查看gdb尝试搜索源文件的目录时，我使用了show directories，它输出了一个变量：

(gdb) show directories
Source directories searched: $cdir:$cwd

但是如何显示两个变量的值：cdir和cwd？尝试过show或p无效。

Answer 1

  

如何显示两个变量的值：cdir和cwd

$cdir stands for编译目录（如果已记录），并且特定于当前源文件。

命令info source应该向您显示当前源文件的信息，包括编译目录：

Starting program: /tmp/a.out 

Temporary breakpoint 1, main (argc=1, argv=0x7fffffffdcb8) at t.c:3
3         return 0;
(gdb) info source
Current source file is t.c
Compilation directory is /tmp     <<<=== this is $cdir
Located in /tmp/t.c
Contains 4 lines.
Source language is c.
Producer is GNU C11 7.3.0 -mtune=generic -march=x86-64 -g.
Compiled with DWARF 2 debugging format.
Does not include preprocessor macro info.

$cwd代表当前的工作目录，您可以使用pwd命令进行检查：

(gdb) pwd
Working directory /tmp.