Leo: Added categories

2020-06-14T23:40:18Z

Added categories

← Older revision		Revision as of 23:40, 14 June 2020
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	* https://linux.die.net/man/1/strace		* https://linux.die.net/man/1/strace
	* https://theartofmachinery.com/2019/11/14/deployment_debugging_strace.html		* https://theartofmachinery.com/2019/11/14/deployment_debugging_strace.html

			{{Navbox Linux}}[[Category:Linux]]
			[[Category:LinuxUtilities]]

Leo: Created page with "{{code|strace}} is a tool for tracing system calls on Linux. Similar debugging tools are {{code|dtrace}} and {{code|ktrace}}. == Introduction == Run any command through {{co..."

2019-11-25T19:22:08Z

Created page with "{{code|strace}} is a tool for tracing system calls on Linux. Similar debugging tools are {{code|dtrace}} and {{code|ktrace}}. == Introduction == Run any command through {{co..."

New page

{{code|strace}} is a tool for tracing system calls on Linux. Similar debugging tools are {{code|dtrace}} and {{code|ktrace}}.

== Introduction ==
Run any command through {{code|strace}} to see all system calls that are generated by the program. Eg.
{{highlight|lang=terminal|code=
$ strace ping google.com
}}

System calls are all APIs that are provided by the kernel that are used by the application. As such, the trace output will allow analysis of:
* Console IO
* Network IO
* Filesystem and file IO
* Process & Thread management
* Raw memory management
* Access to device drivers

Typical use cases for {{code|strace}} is to determine why a program is misbehaving. It's extremely helpful to see exactly where a process is trying to write to before it errors, for instance.

Outputs will show all system calls. Use {{code|man 2}} to find the man page for a particular syscall.

== Usage ==
Basic usage is to prepend your command with {{code|strace}}.
{{highlight|lang=terminal|code=
# Trace a new process
$ strace ping google.com

# Trace an existing process
$ strace -p 1234
}}

Additional parameters can be passed:
* {{code|-o}} to output to a file
* {{code|-s N}} to specify the size of arguments, which defaults to 32
* {{code|-y}} to annotate every file descriptor in the output
* {{code|-p pid}} to attach to an already running process
* {{code|-f}} to follow child processes

== See Also ==
* https://linux.die.net/man/1/strace
* https://theartofmachinery.com/2019/11/14/deployment_debugging_strace.html

Strace - Revision history

Leo: Added categories

Leo: Created page with "{{code|strace}} is a tool for tracing system calls on Linux. Similar debugging tools are {{code|dtrace}} and {{code|ktrace}}. == Introduction == Run any command through {{co..."