GDB：列出所有映射内存区域的过程中坠毁 [英] GDB: Listing all mapped memory regions for a crashed process

问题描述

我接到了一个死亡过程，全方位堆核心转储一个x86 Linux机器（内核2.6.35-22，如果它的事项），其中我试图在GDB调试上。

I've got a full-heap core dump from a dead process on an x86 Linux machine (kernel 2.6.35-22 if it matters), which I'm attempting to debug in GDB.

是否有一个GDB命令我可以使用，意思是让我知道该进程分配的内存地址区域的列表？换句话说，我可以找出所有可能的有效内存地址，我可以在这个破检查？

Is there a GDB command I can use that means "show me a list of all the memory address regions allocated by this process?" In other words, can I figure out what all the possible valid memory addresses are that I can examine in this dump?

我想问的原因是我需要通过的整个进程堆的搜索一定的二进制串，而且为了使用找到命令，我需要有一个开始和结束地址。只需从0x00到0xFF的搜索..不起作用，因为找到只要它遇到一个地址，可以不中止访问：

The reason I ask is that I need to search across the entire process heap for a certain binary string, and in order to use the find command, I need to have a start and end address. Simply searching from 0x00 to 0xff.. doesn't work because find halts as soon as it encounters an address it can't access:

（GDB）发现/ W 0x10000000处，0xff000000，
  为0x12345678

(gdb) find /w 0x10000000, 0xff000000, 0x12345678

警告：无法在0x105ef883访问目标内存，停止
  搜索

warning: Unable to access target memory at 0x105ef883, halting search.

所以，我需要得到所有在内存中的读取的地址区域的列表，所以我可以同时搜索其中之一。

So I need to get a list of all the readable address regions in memory so I can search them one at a time.

（的原因，我需要做的是的是我需要找到所有在内存的某个地址的结构指向的）

(The reason I need to do that is I need to find all the structs in memory that point at a certain address.)

中没有显示纪念品，显示PROC ，信息纪念品，信息PROC 似乎做什么，我需要。

None of show mem, show proc, info mem, info proc seem to do what I need.

推荐答案

在GDB 7.2：

(gdb) help info proc
Show /proc process information about any running process.
Specify any process id, or use the program being debugged by default.
Specify any of the following keywords for detailed info:
  mappings -- list of mapped memory regions.
  stat     -- list a bunch of random process info.
  status   -- list a different bunch of random process info.
  all      -- list all available /proc info.

您想信息PROC映射，除非没有的/ proc （如它不工作在POS验调试）。

You want info proc mappings, except it doesn't work when there is no /proc (such as during pos-mortem debugging).

尝试维护信息部分代替。

这篇关于GDB：列出所有映射内存区域的过程中坠毁的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！