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#!/usr/bin/perl -w
use strict;
use Getopt::Std;
$Getopt::Std::STANDARD_HELP_VERSION++;
my %args;
getopts('f:s', \%args);
sub VERSION_MESSAGE {
# Nothing
}
sub HELP_MESSAGE {
print <<EOS
This program parses a linker map file, especially one produced when linking an iOS executable.
Input is read from a command-line argument or from standard input.
By default a list of libraries used and the size of code and data
linked in from each library is printed, in reverse order of size.
The following options are available:
-s Print a list of symbols instead.
-f 'filter' Filter which libraries are handled. The filter can be
a regular expression, typically several library names
combined with the '|' operator. Makes sense only when
-s is used too.
EOS
}
die "The -f switch makes sense only if -s is also used" if (defined($args{'f'}) && !defined($args{'s'}));
my $state = 0;
my %libofnumber;
my %sizeoflib;
my %sizeofsym;
while (<>) {
if ($state == 0 && m!^# Object files:!) {
$state = 1;
} elsif ($state == 1 && m!^\[ *([0-9]+)\] .*/([-_a-z0-9]+\.a)\(.*!i) {
$libofnumber{$1} = $2;
} elsif ($state == 1 && m!^# Sections:!) {
$state = 2;
} elsif ($state == 2 && m!^# Address\s+Size\s+File\s+Name!) {
$state = 3;
} elsif ($state == 3 && m!^0x[0-9A-F]+\s+(0x[0-9A-F]+)\s+\[ *([0-9]+)\] (.*)!) {
my ($size,$libnum,$symbol) = ($1, $2, $3);
if (defined($libofnumber{$libnum})) {
$sizeoflib{$libofnumber{$libnum}} += hex($size);
if (!defined($args{'f'}) || $libofnumber{$libnum} =~ /$args{'f'}/) {
$sizeofsym{$symbol} = hex($size);
}
}
}
}
if ($args{'s'}) {
# Print symbols in reverse size order
foreach (sort { $sizeofsym{$b} <=> $sizeofsym{$a} } keys(%sizeofsym)) {
print $_, ": ", $sizeofsym{$_}, "\n";
}
} else {
# Print libraries in reverse size order
foreach (sort { $sizeoflib{$b} <=> $sizeoflib{$a} } keys(%sizeoflib)) {
print $_, ": ", $sizeoflib{$_}, "\n";
}
}
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