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executable file 145 lines (125 sloc) 4.86 KB
#!/usr/bin/perl
use IPC::Cmd qw[ run ];
(@ARGV == 1)
or die "ERROR: no map file specified.\n";
open(my $file, $ARGV[0])
or die "ERROR: could not open file '$ARGV[0]'.\n";
my $src = 0;
my $asm = 0;
my $srcdata = 0;
my $data = 0;
while (my $line = <$file>)
{
if ($line =~ /^ \.(\w+)\s+0x[0-9a-f]+\s+(0x[0-9a-f]+) (\w+)\/.+\.o/)
{
my $section = $1;
my $size = hex($2);
my $dir = $3;
if ($size & 3)
{
$size += 4 - ($size % 3);
}
if ($section =~ /text/)
{
if ($dir eq 'src')
{
$src += $size;
}
elsif ($dir eq 'asm')
{
$asm += $size;
}
}
elsif ($section =~ /rodata/)
{
if ($dir eq 'src')
{
$srcdata += $size;
}
elsif ($dir eq 'data')
{
$data += $size;
}
}
}
}
# Note that the grep filters out all branch labels. It also requires a minimum
# line length of 5, to filter out a ton of generated symbols (like AcCn). No
# settings to nm seem to remove these symbols. Finally, nm prints out a separate
# entry for whenever a name appears in a file, not just where it's defined. uniq
# removes all the duplicate entries.
#
#
# You'd expect this to take a while, because of uniq. It runs in under a second,
# though. Uniq is pretty fast!
my $base_cmd = "nm pokefirered.elf | awk '{print \$3}' | grep '^[^_].\\{4\\}' | uniq";
# This looks for Unknown_, Unknown_, or sub_, followed by just numbers. Note that
# it matches even if stuff precedes the unknown, like sUnknown/gUnknown.
my $undoc_cmd = "grep '[Uu]nknown_[0-9a-fA-F]*\\|sub_[0-9a-fA-F]*'";
# This looks for every symbol with an address at the end of it. Some things are
# given a name based on their type / location, but still have an unknown purpose.
# For example, FooMap_EventScript_FFFFFFF.
my $partial_doc_cmd = "grep '_[0-38][0-9a-fA-F]\\{5,6\\}'";
my $count_cmd = "wc -l";
# It sucks that we have to run this three times, but I can't figure out how to get
# stdin working for subcommands in perl while still having a timeout. It's decently
# fast anyway.
my $total_syms_as_string;
(run (
command => "$base_cmd | $count_cmd",
buffer => \$total_syms_as_string,
timeout => 60
))
or die "ERROR: Error while getting all symbols: $?";
my $undocumented_as_string;
(run (
command => "$base_cmd | $undoc_cmd | $count_cmd",
buffer => \$undocumented_as_string,
timeout => 60
))
or die "ERROR: Error while filtering for undocumented symbols: $?";
my $partial_documented_as_string;
(run (
command => "$base_cmd | $partial_doc_cmd | $count_cmd",
buffer => \$partial_documented_as_string,
timeout => 60
))
or die "ERROR: Error while filtering for partial symbols: $?";
# Performing addition on a string converts it to a number. Any string that fails
# to convert to a number becomes 0. So if our converted number is 0, but our string
# is nonzero, then the conversion was an error.
my $undocumented = $undocumented_as_string + 0;
(($undocumented != 0) and ($undocumented_as_string ne "0"))
or die "ERROR: Cannot convert string to num: '$undocumented_as_string'";
my $partial_documented = $partial_documented_as_string + 0;
(($partial_documented != 0) and ($partial_documented_as_string ne "0"))
or die "ERROR: Cannot convert string to num: '$partial_documented_as_string'";
my $total_syms = $total_syms_as_string + 0;
(($total_syms != 0) and ($total_syms_as_string ne "0"))
or die "ERROR: Cannot convert string to num: '$total_syms_as_string'";
($total_syms != 0)
or die "ERROR: No symbols found.";
my $total = $src + $asm;
my $srcPct = sprintf("%.4f", 100 * $src / $total);
my $asmPct = sprintf("%.4f", 100 * $asm / $total);
# partial_documented is double-counting the unknown_* and sub_* symbols.
$partial_documented = $partial_documented - $undocumented;
my $documented = $total_syms - ($undocumented + $partial_documented);
my $docPct = sprintf("%.4f", 100 * $documented / $total_syms);
my $partialPct = sprintf("%.4f", 100 * $partial_documented / $total_syms);
my $undocPct = sprintf("%.4f", 100 * $undocumented / $total_syms);
print "$total total bytes of code\n";
print "$src bytes of code in src ($srcPct%)\n";
print "$asm bytes of code in asm ($asmPct%)\n";
print "\n";
print "$total_syms total symbols\n";
print "$documented symbols documented ($docPct%)\n";
print "$partial_documented symbols partially documented ($partialPct%)\n";
print "$undocumented symbols undocumented ($undocPct%)\n";
print "\n";
my $dataTotal = $srcdata + $data;
my $srcDataPct = sprintf("%.4f", 100 * $srcdata / $dataTotal);
my $dataPct = sprintf("%.4f", 100 * $data / $dataTotal);
print "$dataTotal total bytes of data\n";
print "$srcdata bytes of data in src ($srcDataPct%)\n";
print "$data bytes of data in data ($dataPct%)\n";
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