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

我正在调试gdb中我的程序（验尸）的核心转储。我打开它：
gdb [program_name] [core_name]

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

然而，当我试图检查一个STL向量，
print vec-> size（）
或
print vec-> at（0）

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

我得到错误

如果没有调试过程就不能这样做

"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。有没有办法将一个虚拟进程附加到核心转储gdb检查，所以我可以这样做？

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

(gdb) print *vec

然后熟悉实现向量的内部并打印原始缓冲区。通常称为_M_buffer或类似的东西。根据你的操作方式，缓冲区可能是一个内部对象。

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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