无法设置gdb断点 [英] Not able to set gdb breakpoint

问题描述

我使用多个C ++文件工作。我已经运行可执行文件通过gdb调试分段故障。稍后， gdb backtrace 提供了分段错误之前的函数列表。后来，我试图在一个特定行号的文件中设置一个断点。 （指定的路径是绝对路径）

I work on program with multiple C++ files. I have run the executable through gdb for debugging segmentation fault. Later, gdb backtrace provided the list of functions before segmentation fault. Later, I tried to set a break point in a file on a particular line-number. (The path specified is absolute path)

(gdb) break /aia/r015/home/sathish/zfs_amr/src/zfslbminterfaced2q9.cpp:100

但是，gdb给出以下消息：

However, gdb gives the following message:

No source file named /aia/r015/home/sathish/zfs_amr/src/zfslbminterfaced2q9.cpp.

但是，此位置确实存在。

However, this particular does exist in the location. What really the message means?

推荐答案

这是什么意思？

What really the message means?

消息意味着GDB不知道任何源文件名为 / aia / r015 / home / sathish / zfs_amr / src / zfslbminterfaced2q9 .cpp 。

The message means that GDB does not know about any source file named /aia/r015/home/sathish/zfs_amr/src/zfslbminterfaced2q9.cpp.

有多种原因可能会出现这种情况：

There are multiple reasons this could be the case:

• 缺少此文件的调试信息，原因是该文件编译时没有 -g ，或者因为调试信息被（可能无意中）


• 在上述路径中有一些符号链接，而GDB通过完全解析的路径名来了解该文件，




• 共享库的文件部分和该共享库的符号尚未加载，


• Etc。

• The debug info for this file is missing, either because that file is compiled without -g, or because the debug info was (possibly inadvertantly) stripped later on,
• There are some symbolic links in the above path, and GDB knows that file by fully-resolved pathname instead,
• The file is actually not linked into the executable at all,
• The file part of a shared library, and symbols for that shared library haven't been loaded yet,
• Etc.

如Pat建议，在 zfslbminterfaced2q9.cpp：100

As Pat suggested, setting breakpoint on zfslbminterfaced2q9.cpp:100 is more likely to work.

如果这不起作用，信息来源会告诉你哪些文件GDB 知道。

If that doesn't work, info sources will tell you which files GDB does know about.

更新：

info sources are blank

info sources gives blank

这意味着应用程序根本没有任何调试信息。

This means that the application doesn't have any debug info at all.

通常会出现以下两种情况之一：

Usually this happens for one of two reasons:

• 您忽略了 的 -g （有些平台在编译和链接时需要 -g 时间），


• 您的链接上有一个stray -s li>
  

• You neglected to specify -g on the link line (some platforms require -g both at compile and link time),
• You have a "stray" -s somewhere on your link line (which strips the final executable).

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