utils/GenLibDeps.pl

   1 #!/usr/bin/perl -w
   2 #
   3 # Program:  GenLibDeps.pl
   4 #
   5 # Synopsis: Generate HTML output that shows the dependencies between a set of
   6 #           libraries. The output of this script should periodically replace
   7 #           the similar content in the UsingLibraries.html document.
   8 #
   9 # Syntax:   GenLibDeps.pl [-flat] <directory_with_libraries_in_it> [path_to_nm_binary]
  10 #
  11 use strict;
  12
  13 # Parse arguments...
  14 my $FLAT = 0;
  15 my $WHY = 0;
  16 while (scalar(@ARGV) and ($_ = $ARGV[0], /^[-+]/)) {
  17   shift;
  18   last if /^--$/;  # Stop processing arguments on --
  19
  20   # List command line options here...
  21   if (/^-flat$/)     { $FLAT = 1; next; }
  22   if (/^-why/)       { $WHY = 1; $FLAT = 1; next; }
  23   print "Unknown option: $_ : ignoring!\n";
  24 }
  25
  26 # Give first option a name.
  27 my $Directory = $ARGV[0];
  28 if (!defined($Directory) || ! -d "$Directory") {
  29   die "First argument must specify the directory containing LLVM libs\n";
  30 }
  31
  32 my $nmPath = $ARGV[1];
  33
  34 # Find the "dot" program
  35 my $DotPath="";
  36 if (!$FLAT) {
  37   chomp($DotPath = `which dot`);
  38   die "Can't find 'dot'" if (! -x "$DotPath");
  39 }
  40
  41 if (defined($ENV{NM})) {
  42   chomp($nmPath=$ENV{NM});
  43 }
  44
  45 if (!defined($nmPath) || $nmPath eq "") {
  46   chomp($nmPath=`which nm`);
  47   die "Can't find 'nm'" if (! -x "$nmPath");
  48 }
  49
  50 # Open the directory and read its contents, sorting by name and differentiating
  51 # by whether its a library (.a) or an object file (.o)
  52 opendir DIR,$Directory;
  53 my @files = readdir DIR;
  54 closedir DIR;
  55 my @libs = grep(/libLLVM.*\.(dylib|so|a)$/,sort(@files));
  56 my @objs = grep(/LLVM.*\.o$/,sort(@files));
  57
  58 # Declare the hashes we will use to keep track of the library and object file
  59 # symbol definitions.
  60 my %libdefs;
  61 my %objdefs;
  62
  63 # Gather definitions from the libraries
  64 foreach my $lib (@libs ) {
  65   open DEFS, "$nmPath -g $Directory/$lib|";
  66   while (<DEFS>) {
  67     next if (! / [ABCDGRST] /);
  68     s/^[^ ]* [ABCDGRST] //;
  69     s/\015?\012//; # not sure if <DEFS> is in binmode and uses LF or CRLF.
  70                    # this strips both LF and CRLF.
  71     $libdefs{$_} = $lib;
  72   }
  73   close DEFS or die "nm failed";
  74 }
  75
  76 # Gather definitions from the object files.
  77 foreach my $obj (@objs ) {
  78   open DEFS, "$nmPath -g $Directory/$obj |";
  79   while (<DEFS>) {
  80     next if (! / [ABCDGRST] /);
  81     s/^[^ ]* [ABCDGRST] //;
  82     s/\015?\012//; # not sure if <DEFS> is in binmode and uses LF or CRLF.
  83                    # this strips both LF and CRLF.
  84     $objdefs{$_} = $obj;
  85   }
  86   close DEFS or die "nm failed";
  87 }
  88
  89 # Generate one entry in the <dl> list. This generates the <dt> and <dd> elements
  90 # for one library or object file. The <dt> provides the name of the library or
  91 # object. The <dd> provides a list of the libraries/objects it depends on.
  92 sub gen_one_entry {
  93   my $lib = $_[0];
  94   my $lib_ns = $lib;
  95   $lib_ns =~ s/(.*)\.[oa]/$1/;
  96   if ($FLAT) {
  97     print "$lib:";
  98     if ($WHY) { print "\n"; }
  99   } else {
 100     print "  <dt><b>$lib</b</dt><dd><ul>\n";
 101   }
 102   open UNDEFS,
 103     "$nmPath -u $Directory/$lib | sed -e 's/^[ 0]* U //' | sort | uniq |";
 104   my %DepLibs;
 105   while (<UNDEFS>) {
 106     chomp;
 107     my $lib_printed = 0;
 108     if (defined($libdefs{$_}) && $libdefs{$_} ne $lib) {
 109       $DepLibs{$libdefs{$_}} = [] unless exists $DepLibs{$libdefs{$_}};
 110       push(@{$DepLibs{$libdefs{$_}}}, $_);
 111     } elsif (defined($objdefs{$_}) && $objdefs{$_} ne $lib) {
 112       my $libroot = $lib;
 113       $libroot =~ s/lib(.*).a/$1/;
 114       if ($objdefs{$_} ne "$libroot.o") {
 115         $DepLibs{$objdefs{$_}} = [] unless exists $DepLibs{$objdefs{$_}};
 116         push(@{$DepLibs{$objdefs{$_}}}, $_);
 117       }
 118     }
 119   }
 120   close UNDEFS or die "nm failed";
 121   unless(keys %DepLibs) {
 122     # above failed
 123     open UNDEFS, "$nmPath -u $Directory/$lib |";
 124     while (<UNDEFS>) {
 125       # to bypass non-working sed
 126       if ('  ' eq substr($_,0,2) and index($_,'U ')) {
 127         $_ = substr($_,index($_,'U ')+2)
 128       };
 129       $_ = substr($_,index($_,'  *U ')+5) if -1!=index($_,'  *U ');
 130
 131       chomp;
 132       my $lib_printed = 0;
 133       if (defined($libdefs{$_}) && $libdefs{$_} ne $lib) {
 134         $DepLibs{$libdefs{$_}} = [] unless exists $DepLibs{$libdefs{$_}};
 135         push(@{$DepLibs{$libdefs{$_}}}, $_);
 136       } elsif (defined($objdefs{$_}) && $objdefs{$_} ne $lib) {
 137         my $libroot = $lib;
 138         $libroot =~ s/lib(.*).a/$1/;
 139         if ($objdefs{$_} ne "$libroot.o") {
 140           $DepLibs{$objdefs{$_}} = [] unless exists $DepLibs{$objdefs{$_}};
 141           push(@{$DepLibs{$objdefs{$_}}}, $_);
 142         }
 143       }
 144     }
 145     close UNDEFS or die "nm failed";
 146   }
 147
 148   for my $key (sort keys %DepLibs) {
 149     if ($FLAT) {
 150       print " $key";
 151       if ($WHY) {
 152         print "\n";
 153         my @syms = @{$DepLibs{$key}};
 154         foreach my $sym (@syms) {
 155           print "  $sym\n";
 156         }
 157       }
 158     } else {
 159       print "    <li>$key</li>\n";
 160     }
 161     my $suffix = substr($key,length($key)-1,1);
 162     $key =~ s/(.*)\.[oa]/$1/;
 163     if ($suffix eq "a") {
 164       if (!$FLAT) { print DOT "$lib_ns -> $key [ weight=0 ];\n" };
 165     } else {
 166       if (!$FLAT) { print DOT "$lib_ns -> $key [ weight=10];\n" };
 167     }
 168   }
 169   if ($FLAT) {
 170     if (!$WHY) {
 171       print "\n";
 172     }
 173   } else {
 174     print "  </ul></dd>\n";
 175   }
 176 }
 177
 178 # Make sure we flush on write. This is slower but correct based on the way we
 179 # write I/O in gen_one_entry.
 180 $| = 1;
 181
 182 # Print the definition list tag
 183 if (!$FLAT) {
 184     print "<dl>\n";
 185
 186   open DOT, "| $DotPath -Tgif > libdeps.gif";
 187
 188   print DOT "digraph LibDeps {\n";
 189   print DOT "  size=\"40,15\"; \n";
 190   print DOT "  ratio=\"1.33333\"; \n";
 191   print DOT "  margin=\"0.25\"; \n";
 192   print DOT "  rankdir=\"LR\"; \n";
 193   print DOT "  mclimit=\"50.0\"; \n";
 194   print DOT "  ordering=\"out\"; \n";
 195   print DOT "  center=\"1\";\n";
 196   print DOT "node [shape=\"box\",\n";
 197   print DOT "      color=\"#000088\",\n";
 198   print DOT "      fillcolor=\"#FFFACD\",\n";
 199   print DOT "      fontcolor=\"#3355BB\",\n";
 200   print DOT "      style=\"filled\",\n";
 201   print DOT "      fontname=\"sans\",\n";
 202   print DOT "      fontsize=\"24\"\n";
 203   print DOT "];\n";
 204   print DOT "edge [dir=\"forward\",style=\"solid\",color=\"#000088\"];\n";
 205 }
 206
 207 # Print libraries first
 208 foreach my $lib (@libs) {
 209   gen_one_entry($lib);
 210 }
 211
 212 if (!$FLAT) {
 213   print DOT "}\n";
 214   close DOT;
 215   open DOT, "| $DotPath -Tgif > objdeps.gif";
 216   print DOT "digraph ObjDeps {\n";
 217   print DOT "  size=\"8,10\";\n";
 218   print DOT "  margin=\"0.25\";\n";
 219   print DOT "  rankdir=\"LR\";\n";
 220   print DOT "  mclimit=\"50.0\";\n";
 221   print DOT "  ordering=\"out\";\n";
 222   print DOT "  center=\"1\";\n";
 223   print DOT "node [shape=\"box\",\n";
 224   print DOT "      color=\"#000088\",\n";
 225   print DOT "      fillcolor=\"#FFFACD\",\n";
 226   print DOT "      fontcolor=\"#3355BB\",\n";
 227   print DOT "      fontname=\"sans\",\n";
 228   print DOT "      style=\"filled\",\n";
 229   print DOT "      fontsize=\"24\"\n";
 230   print DOT "];\n";
 231   print DOT "edge [dir=\"forward\",style=\"solid\",color=\"#000088\"];\n";
 232 }
 233
 234 # Print objects second
 235 foreach my $obj (@objs) {
 236   gen_one_entry($obj);
 237 }
 238
 239 if (!$FLAT) {
 240   print DOT "}\n";
 241   close DOT;
 242
 243 # Print end tag of definition list element
 244   print "</dl>\n";
 245 }