Documentation/translations/zh_CN/admin-guide/bug-hunting.rst

Source file repositories/reference/linux-study-clean/Documentation/translations/zh_CN/admin-guide/bug-hunting.rst

File Facts

System
Linux kernel
Corpus path
Documentation/translations/zh_CN/admin-guide/bug-hunting.rst
Extension
.rst
Size
14496 bytes
Lines
332
Domain
Support Tooling And Documentation
Bucket
Documentation
Inferred role
Support Tooling And Documentation: documentation
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

.. include:: ../disclaimer-zh_CN.rst

:Original: :doc:`../../../admin-guide/bug-hunting`

:译者:

 吴想成 Wu XiangCheng <bobwxc@email.cn>

追踪缺陷
=========

内核错误报告通常附带如下堆栈转储::

	------------[ cut here ]------------
	WARNING: CPU: 1 PID: 28102 at kernel/module.c:1108 module_put+0x57/0x70
	Modules linked in: dvb_usb_gp8psk(-) dvb_usb dvb_core nvidia_drm(PO) nvidia_modeset(PO) snd_hda_codec_hdmi snd_hda_intel snd_hda_codec snd_hwdep snd_hda_core snd_pcm snd_timer snd soundcore nvidia(PO) [last unloaded: rc_core]
	CPU: 1 PID: 28102 Comm: rmmod Tainted: P        WC O 4.8.4-build.1 #1
	Hardware name: MSI MS-7309/MS-7309, BIOS V1.12 02/23/2009
	 00000000 c12ba080 00000000 00000000 c103ed6a c1616014 00000001 00006dc6
	 c1615862 00000454 c109e8a7 c109e8a7 00000009 ffffffff 00000000 f13f6a10
	 f5f5a600 c103ee33 00000009 00000000 00000000 c109e8a7 f80ca4d0 c109f617
	Call Trace:
	 [<c12ba080>] ? dump_stack+0x44/0x64
	 [<c103ed6a>] ? __warn+0xfa/0x120
	 [<c109e8a7>] ? module_put+0x57/0x70
	 [<c109e8a7>] ? module_put+0x57/0x70
	 [<c103ee33>] ? warn_slowpath_null+0x23/0x30
	 [<c109e8a7>] ? module_put+0x57/0x70
	 [<f80ca4d0>] ? gp8psk_fe_set_frontend+0x460/0x460 [dvb_usb_gp8psk]
	 [<c109f617>] ? symbol_put_addr+0x27/0x50
	 [<f80bc9ca>] ? dvb_usb_adapter_frontend_exit+0x3a/0x70 [dvb_usb]
	 [<f80bb3bf>] ? dvb_usb_exit+0x2f/0xd0 [dvb_usb]
	 [<c13d03bc>] ? usb_disable_endpoint+0x7c/0xb0
	 [<f80bb48a>] ? dvb_usb_device_exit+0x2a/0x50 [dvb_usb]
	 [<c13d2882>] ? usb_unbind_interface+0x62/0x250
	 [<c136b514>] ? __pm_runtime_idle+0x44/0x70
	 [<c13620d8>] ? __device_release_driver+0x78/0x120
	 [<c1362907>] ? driver_detach+0x87/0x90
	 [<c1361c48>] ? bus_remove_driver+0x38/0x90
	 [<c13d1c18>] ? usb_deregister+0x58/0xb0
	 [<c109fbb0>] ? SyS_delete_module+0x130/0x1f0
	 [<c1055654>] ? task_work_run+0x64/0x80
	 [<c1000fa5>] ? exit_to_usermode_loop+0x85/0x90
	 [<c10013f0>] ? do_fast_syscall_32+0x80/0x130
	 [<c1549f43>] ? sysenter_past_esp+0x40/0x6a
	---[ end trace 6ebc60ef3981792f ]---

这样的堆栈跟踪提供了足够的信息来识别内核源代码中发生错误的那一行。根据问题的
严重性，它还可能包含 **“Oops”** 一词，比如::

	BUG: unable to handle kernel NULL pointer dereference at   (null)
	IP: [<c06969d4>] iret_exc+0x7d0/0xa59
	*pdpt = 000000002258a001 *pde = 0000000000000000
	Oops: 0002 [#1] PREEMPT SMP
	...

尽管有 **Oops** 或其他类型的堆栈跟踪，但通常需要找到出问题的行来识别和处理缺
陷。在本章中，我们将参考“Oops”来了解需要分析的各种堆栈跟踪。

如果内核是用 ``CONFIG_DEBUG_INFO`` 编译的，那么可以使用文件：
`scripts/decode_stacktrace.sh` 。

链接的模块
-----------

受到污染或正在加载/卸载的模块用“（…）”标记，污染标志在
`Documentation/admin-guide/tainted-kernels.rst` 文件中进行了描述，“正在被加
载”用“+”标注，“正在被卸载”用“-”标注。

Annotation

Implementation Notes