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Current File : //usr/src/kernels/3.10.0-1160.90.1.el7.x86_64/scripts/tracing/draw_functrace.pyo
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Copyright 2008 (c) Frederic Weisbecker <fweisbec@gmail.com>
Licensed under the terms of the GNU GPL License version 2

This script parses a trace provided by the function tracer in
kernel/trace/trace_functions.c
The resulted trace is processed into a tree to produce a more human
view of the call stack by drawing textual but hierarchical tree of
calls. Only the functions's names and the the call time are provided.

Usage:
	Be sure that you have CONFIG_FUNCTION_TRACER
	# mount -t debugfs nodev /sys/kernel/debug
	# echo function > /sys/kernel/debug/tracing/current_tracer
	$ cat /sys/kernel/debug/tracing/trace_pipe > ~/raw_trace_func
	Wait some times but not too much, the script is a bit slow.
	Break the pipe (Ctrl + Z)
	$ scripts/draw_functrace.py < raw_trace_func > draw_functrace
	Then you have your drawn trace in draw_functrace
i����NtCallTreecBsGeZdZdZddd�Zd�Zd�Zd�Zd�Z	RS(s� This class provides a tree representation of the functions
		call stack. If a function has no parent in the kernel (interrupt,
		syscall, kernel thread...) then it is attached to a virtual parent
		called ROOT.
	cCsC||_||_|dkr-tj|_n	||_g|_dS(N(t_funct_timetNoneRtROOTt_parentt	_children(tselftfuncttimetparent((sN/usr/src/kernels/3.10.0-1160.90.1.el7.x86_64/scripts/tracing/draw_functrace.pyt__init__#s			cCs&t|||�}|jj|�|S(s� If a function calls another one, call this method to insert it
			into the tree at the appropriate place.
			@return: A reference to the newly created child node.
		(RRtappend(RRtcalltimetchild((sN/usr/src/kernels/3.10.0-1160.90.1.el7.x86_64/scripts/tracing/draw_functrace.pytcalls,scCs`|}x+|tjkr3|j|kr3|j}q	W|tjkr\tjj|d�}|S|S(s� Retrieve the last parent of the current node that
			has the name given by func. If this function is not
			on a parent, then create it as new child of root
			@return: A reference to the parent.
		N(RRRRRR(RRttreeR((sN/usr/src/kernels/3.10.0-1160.90.1.el7.x86_64/scripts/tracing/draw_functrace.pyt	getParent5s!
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s	%s----%s
ii����t is%ss    |(RRRtlenRRtFalseR(Rtbrancht	lastChildtsti((sN/usr/src/kernels/3.10.0-1160.90.1.el7.x86_64/scripts/tracing/draw_functrace.pyt
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t__name__t
__module__t__doc__RRRRRRR(((sN/usr/src/kernels/3.10.0-1160.90.1.el7.x86_64/scripts/tracing/draw_functrace.pyRs					tBrokenLineExceptioncBseZdZRS(syIf the last line is not complete because of the pipe breakage,
	   we want to stop the processing and ignore this line.
	(RRR (((sN/usr/src/kernels/3.10.0-1160.90.1.el7.x86_64/scripts/tracing/draw_functrace.pyR!YstCommentLineExceptioncBseZdZRS(sY If the line is a comment (as in the beginning of the trace file),
	    just ignore it.
	(RRR (((sN/usr/src/kernels/3.10.0-1160.90.1.el7.x86_64/scripts/tracing/draw_functrace.pyR"_scCss|j�}|jd�r$t�ntjd|�}|dkrKt�n|jd�|jd�|jd�fS(Nt#s"[^]]+?\] +([0-9.]+): (\w+) <-(\w+)iii(tstript
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t__main__((
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