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#!/usr/bin/perl -w
#
# Program: GenLibDeps.pl
#
# Synopsis: Generate HTML output that shows the dependencies between a set of
# libraries. The output of this script should periodically replace
# the similar content in the UsingLibraries.html document.
#
# Syntax: GenLibDeps.pl [-flat] <directory_with_libraries_in_it> [path_to_nm_binary]
#
use strict;
# Parse arguments...
my $FLAT = 0;
my $WHY = 0;
while (scalar(@ARGV) and ($_ = $ARGV[0], /^[-+]/)) {
shift;
last if /^--$/; # Stop processing arguments on --
# List command line options here...
if (/^-flat$/) { $FLAT = 1; next; }
if (/^-why/) { $WHY = 1; $FLAT = 1; next; }
print "Unknown option: $_ : ignoring!\n";
}
# Give first option a name.
my $Directory = $ARGV[0];
if (!defined($Directory) || ! -d "$Directory") {
die "First argument must specify the directory containing LLVM libs\n";
}
my $nmPath = $ARGV[1];
# Find the "dot" program
my $DotPath="";
if (!$FLAT) {
chomp($DotPath = `which dot`);
die "Can't find 'dot'" if (! -x "$DotPath");
}
if (defined($ENV{NM})) {
chomp($nmPath=$ENV{NM});
}
if (!defined($nmPath) || $nmPath eq "") {
chomp($nmPath=`which nm`);
die "Can't find 'nm'" if (! -x "$nmPath");
}
# Open the directory and read its contents, sorting by name and differentiating
# by whether its a library (.a) or an object file (.o)
opendir DIR,$Directory;
my @files = readdir DIR;
closedir DIR;
my @libs = grep(/libLLVM.*\.(dylib|so|a)$/,sort(@files));
my @objs = grep(/LLVM.*\.o$/,sort(@files));
# Declare the hashes we will use to keep track of the library and object file
# symbol definitions.
my %libdefs;
my %objdefs;
# Gather definitions from the libraries
foreach my $lib (@libs ) {
open DEFS, "$nmPath -g $Directory/$lib|";
while (<DEFS>) {
next if (! / [ABCDGRST] /);
s/^[^ ]* [ABCDGRST] //;
s/\015?\012//; # not sure if <DEFS> is in binmode and uses LF or CRLF.
# this strips both LF and CRLF.
$libdefs{$_} = $lib;
}
close DEFS or die "nm failed";
}
# Gather definitions from the object files.
foreach my $obj (@objs ) {
open DEFS, "$nmPath -g $Directory/$obj |";
while (<DEFS>) {
next if (! / [ABCDGRST] /);
s/^[^ ]* [ABCDGRST] //;
s/\015?\012//; # not sure if <DEFS> is in binmode and uses LF or CRLF.
# this strips both LF and CRLF.
$objdefs{$_} = $obj;
}
close DEFS or die "nm failed";
}
# Generate one entry in the <dl> list. This generates the <dt> and <dd> elements
# for one library or object file. The <dt> provides the name of the library or
# object. The <dd> provides a list of the libraries/objects it depends on.
sub gen_one_entry {
my $lib = $_[0];
my $lib_ns = $lib;
$lib_ns =~ s/(.*)\.[oa]/$1/;
if ($FLAT) {
print "$lib:";
if ($WHY) { print "\n"; }
} else {
print " <dt><b>$lib</b</dt><dd><ul>\n";
}
open UNDEFS,
"$nmPath -u $Directory/$lib | sed -e 's/^[ 0]* U //' | sort | uniq |";
my %DepLibs;
while (<UNDEFS>) {
chomp;
my $lib_printed = 0;
if (defined($libdefs{$_}) && $libdefs{$_} ne $lib) {
$DepLibs{$libdefs{$_}} = [] unless exists $DepLibs{$libdefs{$_}};
push(@{$DepLibs{$libdefs{$_}}}, $_);
} elsif (defined($objdefs{$_}) && $objdefs{$_} ne $lib) {
my $libroot = $lib;
$libroot =~ s/lib(.*).a/$1/;
if ($objdefs{$_} ne "$libroot.o") {
$DepLibs{$objdefs{$_}} = [] unless exists $DepLibs{$objdefs{$_}};
push(@{$DepLibs{$objdefs{$_}}}, $_);
}
}
}
close UNDEFS or die "nm failed";
unless(keys %DepLibs) {
# above failed
open UNDEFS, "$nmPath -u $Directory/$lib |";
while (<UNDEFS>) {
# to bypass non-working sed
if (' ' eq substr($_,0,2) and index($_,'U ')) {
$_ = substr($_,index($_,'U ')+2)
};
$_ = substr($_,index($_,' *U ')+5) if -1!=index($_,' *U ');
chomp;
my $lib_printed = 0;
if (defined($libdefs{$_}) && $libdefs{$_} ne $lib) {
$DepLibs{$libdefs{$_}} = [] unless exists $DepLibs{$libdefs{$_}};
push(@{$DepLibs{$libdefs{$_}}}, $_);
} elsif (defined($objdefs{$_}) && $objdefs{$_} ne $lib) {
my $libroot = $lib;
$libroot =~ s/lib(.*).a/$1/;
if ($objdefs{$_} ne "$libroot.o") {
$DepLibs{$objdefs{$_}} = [] unless exists $DepLibs{$objdefs{$_}};
push(@{$DepLibs{$objdefs{$_}}}, $_);
}
}
}
close UNDEFS or die "nm failed";
}
for my $key (sort keys %DepLibs) {
if ($FLAT) {
print " $key";
if ($WHY) {
print "\n";
my @syms = @{$DepLibs{$key}};
foreach my $sym (@syms) {
print " $sym\n";
}
}
} else {
print " <li>$key</li>\n";
}
my $suffix = substr($key,length($key)-1,1);
$key =~ s/(.*)\.[oa]/$1/;
if ($suffix eq "a") {
if (!$FLAT) { print DOT "$lib_ns -> $key [ weight=0 ];\n" };
} else {
if (!$FLAT) { print DOT "$lib_ns -> $key [ weight=10];\n" };
}
}
if ($FLAT) {
if (!$WHY) {
print "\n";
}
} else {
print " </ul></dd>\n";
}
}
# Make sure we flush on write. This is slower but correct based on the way we
# write I/O in gen_one_entry.
$| = 1;
# Print the definition list tag
if (!$FLAT) {
print "<dl>\n";
open DOT, "| $DotPath -Tgif > libdeps.gif";
print DOT "digraph LibDeps {\n";
print DOT " size=\"40,15\"; \n";
print DOT " ratio=\"1.33333\"; \n";
print DOT " margin=\"0.25\"; \n";
print DOT " rankdir=\"LR\"; \n";
print DOT " mclimit=\"50.0\"; \n";
print DOT " ordering=\"out\"; \n";
print DOT " center=\"1\";\n";
print DOT "node [shape=\"box\",\n";
print DOT " color=\"#000088\",\n";
print DOT " fillcolor=\"#FFFACD\",\n";
print DOT " fontcolor=\"#3355BB\",\n";
print DOT " style=\"filled\",\n";
print DOT " fontname=\"sans\",\n";
print DOT " fontsize=\"24\"\n";
print DOT "];\n";
print DOT "edge [dir=\"forward\",style=\"solid\",color=\"#000088\"];\n";
}
# Print libraries first
foreach my $lib (@libs) {
gen_one_entry($lib);
}
if (!$FLAT) {
print DOT "}\n";
close DOT;
open DOT, "| $DotPath -Tgif > objdeps.gif";
print DOT "digraph ObjDeps {\n";
print DOT " size=\"8,10\";\n";
print DOT " margin=\"0.25\";\n";
print DOT " rankdir=\"LR\";\n";
print DOT " mclimit=\"50.0\";\n";
print DOT " ordering=\"out\";\n";
print DOT " center=\"1\";\n";
print DOT "node [shape=\"box\",\n";
print DOT " color=\"#000088\",\n";
print DOT " fillcolor=\"#FFFACD\",\n";
print DOT " fontcolor=\"#3355BB\",\n";
print DOT " fontname=\"sans\",\n";
print DOT " style=\"filled\",\n";
print DOT " fontsize=\"24\"\n";
print DOT "];\n";
print DOT "edge [dir=\"forward\",style=\"solid\",color=\"#000088\"];\n";
}
# Print objects second
foreach my $obj (@objs) {
gen_one_entry($obj);
}
if (!$FLAT) {
print DOT "}\n";
close DOT;
# Print end tag of definition list element
print "</dl>\n";
}
|
