在GDB中，如何将“exec-wrapper env”设置为多个环境变量？ [英] In GDB, how can I set 'exec-wrapper env' to multiple environmental variables?

问题描述

在GDB中，您可以使用设置exec-wrapper env'MYENVVAR = ...'来设置进程的环境变量。这很好，但我不知道如何设置多个 - 有一些分隔符你必须使用？我想为进程设置 LD_PRELOAD 和 LD_LIBRARY_PATH 。我该怎么做？

In GDB you can set the environmental variables for a process using set exec-wrapper env 'MYENVVAR=...'. This works great, but I'm not sure how to set multiple ones - is there some sort of delimiter you have to use? I'd like to set both LD_PRELOAD and LD_LIBRARY_PATH for a process. How would I do this?

推荐答案

您可以使用

set exec-wrapper env VAR1=val1 VAR2=val2

设置多个环境变量。这些值应该适当地引用你的shell，所以在它们周围放置单引号是个好主意。

to set multiple environment variables. The values should be appropriately quoted for your shell, so putting single quotes around them would be a good idea.

稍微更详细的说明：

set exec-wrapper 命令设置一个字符串变量以包含命令行的其余部分。

The set exec-wrapper command sets a string variable to contain the rest of the command line.

当运行可执行文件时， gdb 会执行以下伪代码：

When it comes time to run your executable, gdb does something like the following pseudo-code:

shell_cmd = "exec ";
if (exec_wrapper)
     shell_cmd += exec_wrapper + " ";
shell_cmd += quote_shell_metacharacters(exec_file);
execl(getenv("SHELL"), "sh", "-c", shell_cmd, (char *)0);

所以， exec-wrapper 可以是任何在shell中前面加上exec的命令行。

So, exec-wrapper can be any command line that makes sense when preceded by "exec " in your shell.

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