SND_BUG(9) Miscellaneous Functions SND_BUG(9)NAME
snd_BUG - give a BUG warning message and stack trace
Calls WARN if CONFIG_SND_DEBUG is set. Ignored when CONFIG_SND_DEBUG is not set.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 SND_BUG(9)
Check Out this Related Man Page
STACK(9) BSD Kernel Developer's Manual STACK(9)NAME
stack -- kernel thread stack tracing routines
In the kernel configuration file:
struct stack *
stack_destroy(struct stack *st);
stack_put(struct stack *st, vm_offset_t pc);
stack_copy(struct stack *src, struct stack dst);
stack_zero(struct stack *st);
stack_print(struct stack *st);
stack_print_ddb(struct stack *st);
stack_print_short(struct stack *st);
stack_print_short_ddb(struct stack *st);
stack_sbuf_print(struct sbuf sb*, struct stack *st);
stack_sbuf_print_ddb(struct sbuf sb*, struct stack *st);
stack_save(struct stack *st);
The stack KPI allows querying of kernel stack trace information and the automated generation of kernel stack trace strings for the purposes
of debugging and tracing. To use the KPI, at least one of options DDB and options STACK must be compiled into the kernel.
Each stack trace is described by a struct stack. Before a trace may be created or otherwise manipulated, storage for the trace must be allo-
cated with stack_create(), which may sleep. Memory associated with a trace is freed by calling stack_destroy().
A trace of the current kernel thread's call stack may be captured using stack_save().
stack_print() and stack_print_short() may be used to print a stack trace using the kernel printf(9), and may sleep as a result of acquiring
sx(9) locks in the kernel linker while looking up symbol names. In locking-sensitive environments, the unsynchronized stack_print_ddb() and
stack_print_short_ddb() variants may be invoked. This function bypasses kernel linker locking, making it usable in ddb(4), but not in a live
system where linker data structures may change.
stack_sbuf_print() may be used to construct a human-readable string, including conversion (where possible) from a simple kernel instruction
pointer to a named symbol and offset. The argument sb must be an initialized struct sbuf as described in sbuf(9). This function may sleep
if an auto-extending struct sbuf is used, or due to kernel linker locking. In locking-sensitive environments, such as ddb(4), the unsynchro-
nized stack_sbuf_print_ddb() variant may be invoked to avoid kernel linker locking; it should be used with a fixed-length sbuf.
The utility functions stack_zero, stack_copy, and stack_put may be used to manipulate stack data structures directly.
SEE ALSO ddb(4), printf(9), sbuf(9), sx(9)AUTHORS
The stack(9) function suite was created by Antoine Brodin. stack(9) was extended by Robert Watson for general-purpose use outside of ddb(4).
BSD June 24, 2009 BSD
I know the following questions are noobish questions but I am asking them because I am confused about the basics of history behind UNIX and LINUX.
Ok onto business, my questions are-:
Was/Is UNIX ever an open source operating system ?
If UNIX was... (21 Replies)
Hello and thanks in advance for any help anyone can offer me
I'm trying to learn the find command and thought I was understanding it... Apparently I was wrong. I was doing compound searches and I started getting weird results with the -size test. I was trying to do a search on a 1G file owned by... (14 Replies)
i have installed quota on my centos 7 machine and its what im after (setting size limit on users, so they cant fill the hard drive)
i want to now make this part of my create user script for my sftp server so i want to do a echo and a read command so i capture the limit they enter... (0 Replies)
I need to write a shell script which opens a file and increments the version(text) within the file every time the script runs. For example:
$ cat docker_file.yml
So, I would like... (6 Replies)
We use DB2 v10.5 and using DBArtisan tool
Can someone please guide how to convert digits to binary numbers using db2 feature.
Ex> for number 9 , binary should be 1001 ( 8+1)
Any help appreciated. Thanks (2 Replies)
how to using tar with exclude directory and compress it using tar.Z
i only know how to exclude dir only with this command below:
tar -cvf /varios/restore/test.tar -X excludefile.txt /jfma/test1/
how to compress it using 1 command?
Please use CODE tags as... (6 Replies)
Quite an obscure question I think.
We have a rebuild process for remote sites that allows us to PXE rebuild a till (actually a PC with a touch screen and various fancy bits) running CentOS. The current CentOS5 tills work just fine with a tar image restore and some personalisation. Sadly,... (4 Replies)
I had recently learnt a bit of Docker(which provides containerization process).
Here are some of my learning points from it.
Let us start first with very basic question:
What is Docker:
Docker is a platform for sysadmins and developers to DEPLOY, DEVELOP and RUN applications ... (7 Replies)
What is the point of this? Whenever I close my shell it appends to the history file without adding this. I have never seen it overwrite my history file.
# When the shell exits, append to the history file instead of overwriting it
shopt -s histappend (3 Replies)
Hello... And thanks in advance for any help anyone can offer me
I was trying to work out the differences between displaying modify, access, and change times with the 'ls' command. Everything seems in order when I look at files, but the access time on a directory doesn't seem to change when I... (4 Replies)
I am having an issue here with CentOS release 6.6 (Final) that shows all of the space used up, but I can't tell where the space went.
Seemingly I am using up 100%, according to
Filesystem Size Used Avail Use% Mounted on... (27 Replies)
I'm trying to use a bash script for a psych experiment that involves listening to sound files and responding. If I have something like the code below, how can I make sure that a key press is assigned to RESPONSE only after the second echo statement?
for i in 1 2 3; do
... (10 Replies)
After the success of the jq - tool for parsing and manipulating JSON-Data someone wrote a tool called yq, which aims to be the same for YAML, what jq is for JSON. Seems to work fine. I'll definitely give it a chance in future.
... (1 Reply)
I am very pleased to announce that Dave Munro (gull04) is joining the Moderation Team, after being a very valuable member of UNIX.com for 15+ years.
Dave is an IT Consultant with 30 years of experience this year, has worked in many of the industry vertical market segments and has... (6 Replies)