dwslovedh has asked for the wisdom of the Perl Monks concerning the following question:
Hi,there! I want to extract all the function call chains with specific length in source C codes. For example:
f1 calls (f2) f2 calls (f3,f4) f3 calls nothing f4 calls f5 f5 calls nothing
So f1->f2->f4->f5 is one of the function call chains and the length is 4. If I want to extract all the function call chains with length 3, then the results should be:
f1->f2->f3 f1->f2->f4 f2->f4->f5
The source codes are big and I have gotten all the function call information like above, i.e., f1 calls f2 and saved it in a hash of array. The keys are the caller function names and the value arrays are the callee function names. For the example above, the data structure is:
key value f1 f2 f2 f3,f4 f3 f4 f5 f5
I tended to use recursion, but was stuck, pls help! The code snippet is:
my %calls; #has all the function call information my $length = 3; #the length of function chains my @chain_store; #array of array, to save the chains while (($key, $value) = each %calls) { my @chain = (); push @chain, $key; get_chains($value, \@chain); } sub get_chains { my $value = shift; my $chain_ref = shift; my @chain = @{$chain_ref}; foreach my $val @{$value} { push @chain, $val; my $is_present = 1; for (my $count = 0; $count < $length; $count++) { if (exist($calls{$val})) { get_chains($calls{$val}) } else { $is_present = 0; last; } } if ($is_present) { push @chain_store, @chain; } } }
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Replies are listed 'Best First'. | |
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Re: extract the function call chains of specific length
by choroba (Cardinal) on Jul 11, 2013 at 15:22 UTC | |
by dwslovedh (Novice) on Jul 12, 2013 at 12:19 UTC | |
Re: extract the function call chains of specific length
by sundialsvc4 (Abbot) on Jul 12, 2013 at 03:34 UTC | |
by dwslovedh (Novice) on Jul 12, 2013 at 12:20 UTC | |
Re: extract the function call chains of specific length
by DrHyde (Prior) on Jul 15, 2013 at 11:12 UTC |
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