问题描述
考虑下面的linux内核转储的堆栈跟踪,您可以通过调用触发内核源码code恐慌恐慌(调试linux内核恐慌);
:
Consider the following linux kernel dump stack trace, you can trigger a panic from the kernel source code by calling panic("debugging a linux kernel panic");
:
[<001360ac>] (unwind_backtrace+0x0/0xf8) from [<00147b7c>] (warn_slowpath_common+0x50/0x60)
[<00147b7c>] (warn_slowpath_common+0x50/0x60) from [<00147c40>] (warn_slowpath_null+0x1c/0x24)
[<00147c40>] (warn_slowpath_null+0x1c/0x24) from [<0014de44>] (local_bh_enable_ip+0xa0/0xac)
[<0014de44>] (local_bh_enable_ip+0xa0/0xac) from [<0019594c>] (bdi_register+0xec/0x150)
- 在
unwind_backtrace +为0x0 / 0xF8时
什么+为0x0 / 0xF8时
表示? - 我怎么能看到
unwind_backtrace +为0x0 / 0xF8时
? 中C code - 如何跨preT恐慌的内容?
- In
unwind_backtrace+0x0/0xf8
what the+0x0/0xf8
stands for? - How can I see the C code of
unwind_backtrace+0x0/0xf8
? - How to interpret the panic's content?
推荐答案
这只是一个普通的回溯,这些函数的调用以相反的顺序(第一个叫被称为由previous之一,并依此类推):
It's just an ordinary backtrace, those functions are called in reverse order (first one called was called by the previous one and so on):
unwind_backtrace+0x0/0xf8
warn_slowpath_common+0x50/0x60
warn_slowpath_null+0x1c/0x24
ocal_bh_enable_ip+0xa0/0xac
bdi_register+0xec/0x150
的 bdi_register + 0xec /量0x150
是符号+偏移/长度有大约在的以及如何调试内核哎呀。也有在
The bdi_register+0xec/0x150
is the symbol + the offset/length there's more information about that in Understanding a Kernel Oops and how you can debug a kernel oops. Also there's this excellent tutorial on Debugging the Kernel
注:如由Eugene以下建议,你可能想尝试第一,它仍然需要一个图像虽然与调试符号,例如:
Note: as suggested below by Eugene, you may want to try addr2line first, it still needs an image with debugging symbols though, for example
addr2line -e vmlinux_with_debug_info 0019594c(+偏移量)
这篇关于如何阅读,理解,分析和调试Linux内核恐慌?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!