CPROF(1) CPROF(1)
NAME
cprof - coverage profiling of limbo programs
SYNOPSIS
cprof [ -nfer ] [ -m modname ] ... [ cmd arg ... ]
DESCRIPTION
Cprof is a coverage profiling tool which shows whether lines
of limbo source have been executed or not. It can also show
the number of times a line of code has been executed and can
accumulate results over a series of runs if so desired. The
source in question should be compiled with the -g flag so
that the relevant symbol table files exist.
The -n option lists the name of the file along with the line
number.
The -f option shows the number of times source code is exe-
cuted rather than simply indicating coverage.
The -r options indicates that the profiling results should
be recorded. Any profiled dis file of the form <name>.dis
will have the raw profiling results stored in a file named
<name>.prf. If this file already existed before the run, the
results will be added to this file. The profiling results
are not shown when this option is given.
The -m option lists the module names which are to be pro-
filed. If none are given, all the modules loaded by the ker-
nel will be profiled. The name may be the actual name of the
module or its path name.
The -e option profiles the module that is loaded first in
any following command. In this case there is no need to give
a -m option as this is added automatically.
Any remaining arguments are assumed to specify a command and
set of arguments to the command. If this is the case, cprof
will automatically start profiling, run the command to com-
pletion and then stop profiling before either recording the
results or showing the profile statistics.
If no command is given to profile, then cprof will show the
profile statistics from any existing recorded results in
.prf files instead.
Cprof discriminates between different sections of code on
the same line. A limbo for statement, for example, consist-
ing of initialization, condition and step all on the same
line of source code will be dealt with as three separate
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CPROF(1) CPROF(1)
sections.
Cprof displays the profile statistics as a list of the limbo
source preceded by a line number and an indication of
whether the line was executed or not. For each section of
code on each line, a plus sign indicates that it was exe-
cuted, a minus sign that it was not and a question mark
indicates that some of the dis instructions associated with
the section of code were executed but some were not. Lines
with no associated dis code do not have an indication. Of
course, given the -f option, the number of times each sec-
tion is executed is shown instead.
EXAMPLE
To profile a particular command
cprof /dis/math/sieve 100
To profile the same command but restrict attention to its own module (Sieve).
cprof -m Sieve /dis/math/sieve 100
A shorter version of the above
cprof -e /dis/math/sieve 100
Make 3 runs recording results as we go
cprof -e -r /dis/math/sieve 100
cprof -e -r /dis/math/sieve 1000
cprof -e -r /dis/math/sieve 10000
Now look at the cumulative results
cprof -m /dis/math/sieve.dis
SOURCE
/appl/cmd/cprof.b
SEE ALSO
prof(1), wm-cprof(1), prof(2), prof(3)
BUGS
Cprof cannot profile compiled limbo programs.
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