GDB C++ - 在查看核心转储时检查 STL 容器? [英] GDB C++ - Inspecting STL Containers when looking at a core dump?

问题描述

我正在 gdb 中调试我的程序的核心转储(事后分析).我打开它:gdb [程序名称] [核心名称]

I'm debugging a core dump of my program (post-mortem) inside gdb. I opened it with: gdb [program_name] [core_name]

但是，当我尝试检查 STL 向量时，例如打印 vec->size()或者打印 vec->at(0)

However when I attempt to inspect a STL vector, e.g. print vec->size() or print vec->at(0)

我得到了错误

如果没有调试过程，您将无法做到这一点"

"You can't do that without a process to debug"

我只是想检查这些容器的内容和大小.有什么方法可以将虚拟进程附加到核心转储 gdb 检查，以便我可以做到这一点?

I'm just trying to inspect the contents and sizes of these containers. Is there any way to attach a dummy process to a core-dump gdb inspection so I can do this?

推荐答案

打印向量:

(gdb) print *vec

然后熟悉实现向量的内部结构并打印原始缓冲区.通常称为_M_buffer"或类似的名称.根据您的操作方式，缓冲区可能位于其中的内部对象.

Then familiarize yourself with the internals of your implementation's vector and print the raw buffer. Often called "_M_buffer" or something like that. Depending on how yours is done there may be an internal object that the buffer is inside of.

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