src/llvm/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 use warnings;
  13 # Parse arguments...
  14 my $FLAT = 0;
  15 my $WHY = 0;
  16 my $PEROBJ = 0;
  17 my $PEROBJINCL = 0;
  18 while (scalar(@ARGV) and ($_ = $ARGV[0], /^[-+]/)) {
  19   shift;
  20   last if /^--$/;  # Stop processing arguments on --
  21
  22   # List command line options here...
  23   if (/^-flat$/)     { $FLAT = 1; next; }
  24   if (/^-why/)       { $WHY = 1; $FLAT = 1; next; }
  25   if (/^-perobj$/)    { $PEROBJ = 1; next; }
  26   if (/^-perobjincl/) { $PEROBJINCL = 1; next;}
  27   print "Unknown option: $_ : ignoring!\n";
  28 }
  29
  30 # Give first option a name.
  31 my $Directory = $ARGV[0];
  32 if (!defined($Directory) || ! -d "$Directory") {
  33   die "First argument must specify the directory containing LLVM libs\n";
  34 }
  35
  36 my $nmPath = $ARGV[1];
  37
  38 # Find the "dot" program
  39 my $DotPath="";
  40 if (!$FLAT) {
  41   chomp($DotPath = `which dot`);
  42   die "Can't find 'dot'" if (! -x "$DotPath");
  43 }
  44
  45 if (defined($ENV{NM})) {
  46   chomp($nmPath=$ENV{NM});
  47 }
  48
  49 if (!defined($nmPath) || $nmPath eq "") {
  50   chomp($nmPath=`which nm`);
  51   die "Can't find 'nm'" if (! -x "$nmPath");
  52 }
  53
  54 my $ranlibPath;
  55 if ($PEROBJ) {
  56   $ranlibPath = $ARGV[2];
  57   if (defined($ENV{RANLIB})) {
  58     chomp($ranlibPath=$ENV{RANLIB});
  59   }
  60
  61   if (!defined($ranlibPath) || $ranlibPath eq "") {
  62     chomp($ranlibPath=`which ranlib`);
  63     die "Can't find 'ranlib'" if (! -x "$ranlibPath");
  64   }
  65 }
  66
  67 # Open the directory and read its contents, sorting by name and differentiating
  68 # by whether its a library (.a) or an object file (.o)
  69 opendir DIR,$Directory;
  70 my @files = readdir DIR;
  71 closedir DIR;
  72 my @libs = grep(/libLLVM.*\.(dylib|so|a)$/,sort(@files));
  73 # Omit the all-of-llvm shared library.
  74 @libs = grep(!/libLLVM-\d\.\d(svn)?\.(dylib|so)/, @libs);
  75 my @objs = grep(/LLVM.*\.o$/,sort(@files));
  76
  77 # Declare the hashes we will use to keep track of the library and object file
  78 # symbol definitions.
  79 my %libdefs;
  80 my %objdefs;
  81
  82 my %libobjs;
  83 my %objdeps=();
  84 # Gather library definitions at object file granularity (optional)
  85 if ($PEROBJ) {
  86   foreach my $lib (@libs ) {
  87     `$ranlibPath $Directory/$lib`;
  88     my $libpath = $lib;
  89     $libpath =~ s/^libLLVM(.*)\.a/$1/;
  90     $libpath =~ s/(.+)CodeGen$/Target\/$1/;
  91     $libpath =~ s/(.+)AsmPrinter$/Target\/$1\/AsmPrinter/;
  92     $libpath =~ s/(.+)AsmParser$/Target\/$1\/AsmParser/;
  93     $libpath =~ s/(.+)Info$/Target\/$1\/TargetInfo/;
  94     $libpath =~ s/(.+)Disassembler$/Target\/$1\/Disassembler/;
  95     $libpath =~ s/SelectionDAG/CodeGen\/SelectionDAG/;
  96     $libpath =~ s/^AsmPrinter/CodeGen\/AsmPrinter/;
  97     $libpath =~ s/^BitReader/Bitcode\/Reader/;
  98     $libpath =~ s/^BitWriter/Bitcode\/Writer/;
  99     $libpath =~ s/^CppBackend/Target\/CppBackend/;
 100     $libpath =~ s/^MSIL/Target\/MSIL/;
 101     $libpath =~ s/^Core/VMCore/;
 102     $libpath =~ s/^Instrumentation/Transforms\/Instrumentation/;
 103     $libpath =~ s/^Interpreter/ExecutionEngine\/Interpreter/;
 104     $libpath =~ s/^JIT/ExecutionEngine\/JIT/;
 105     $libpath =~ s/^ScalarOpts/Transforms\/Scalar/;
 106     $libpath =~ s/^TransformUtils/Transforms\/Utils/;
 107     $libpath =~ s/^ipa/Analysis\/IPA/;
 108     $libpath =~ s/^ipo/Transforms\/IPO/;
 109     $libpath = "lib/".$libpath."/";
 110     open DEFS, "$nmPath -sg $Directory/$lib|";
 111     while (<DEFS>) {
 112       chomp;
 113       if (/^([^ ]*) in ([^ ]*)/) {
 114         my $objfile = $libpath.$2;
 115         $objdefs{$1} = $objfile;
 116         $objdeps{$objfile} = {};
 117         $libobjs{$lib}{$objfile}=1;
 118 #        my $p = "../llvm/".$objfile;
 119 #        $p =~ s/Support\/reg(.*).o/Support\/reg$1.c/;
 120 #        $p =~ s/.o$/.cpp/;
 121 #        unless (-e $p) {
 122 #          die "$p\n"
 123 #        }
 124       }
 125     }
 126     close DEFS or die "nm failed";
 127   }
 128   foreach my $lib (@libs ) {
 129     my $libpath = $lib;
 130     $libpath =~ s/^libLLVM(.*)\.a/$1/;
 131     $libpath =~ s/(.+)CodeGen$/Target\/$1/;
 132     $libpath =~ s/(.+)AsmPrinter$/Target\/$1\/AsmPrinter/;
 133     $libpath =~ s/(.+)AsmParser$/Target\/$1\/AsmParser/;
 134     $libpath =~ s/(.+)Info$/Target\/$1\/TargetInfo/;
 135     $libpath =~ s/(.+)Disassembler$/Target\/$1\/Disassembler/;
 136     $libpath =~ s/SelectionDAG/CodeGen\/SelectionDAG/;
 137     $libpath =~ s/^AsmPrinter/CodeGen\/AsmPrinter/;
 138     $libpath =~ s/^BitReader/Bitcode\/Reader/;
 139     $libpath =~ s/^BitWriter/Bitcode\/Writer/;
 140     $libpath =~ s/^CppBackend/Target\/CppBackend/;
 141     $libpath =~ s/^MSIL/Target\/MSIL/;
 142     $libpath =~ s/^Core/VMCore/;
 143     $libpath =~ s/^Instrumentation/Transforms\/Instrumentation/;
 144     $libpath =~ s/^Interpreter/ExecutionEngine\/Interpreter/;
 145     $libpath =~ s/^JIT/ExecutionEngine\/JIT/;
 146     $libpath =~ s/^ScalarOpts/Transforms\/Scalar/;
 147     $libpath =~ s/^TransformUtils/Transforms\/Utils/;
 148     $libpath =~ s/^ipa/Analysis\/IPA/;
 149     $libpath =~ s/^ipo/Transforms\/IPO/;
 150     $libpath = "lib/".$libpath."/";
 151     open UDEFS, "$nmPath -Aup $Directory/$lib|";
 152     while (<UDEFS>) {
 153       chomp;
 154       if (/:([^:]+):/) {
 155         my $obj = $libpath.$1;
 156         s/[^ ]+: *U //;
 157         if (defined($objdefs{$_})) {
 158           $objdeps{$obj}{$objdefs{$_}}=1;
 159         }
 160       }
 161     }
 162     close UDEFS or die "nm failed"
 163   }
 164 } else {
 165 # Gather definitions from the libraries
 166 foreach my $lib (@libs ) {
 167   open DEFS, "$nmPath -g $Directory/$lib|";
 168   while (<DEFS>) {
 169     next if (! / [ABCDGRST] /);
 170     s/^[^ ]* [ABCDGRST] //;
 171     s/\015?\012//; # not sure if <DEFS> is in binmode and uses LF or CRLF.
 172                    # this strips both LF and CRLF.
 173     $libdefs{$_} = $lib;
 174   }
 175   close DEFS or die "nm failed";
 176 }
 177 }
 178
 179 # Gather definitions from the object files.
 180 foreach my $obj (@objs ) {
 181   open DEFS, "$nmPath -g $Directory/$obj |";
 182   while (<DEFS>) {
 183     next if (! / [ABCDGRST] /);
 184     s/^[^ ]* [ABCDGRST] //;
 185     s/\015?\012//; # not sure if <DEFS> is in binmode and uses LF or CRLF.
 186                    # this strips both LF and CRLF.
 187     $objdefs{$_} = $obj;
 188   }
 189   close DEFS or die "nm failed";
 190 }
 191
 192 # Generate one entry in the <dl> list. This generates the <dt> and <dd> elements
 193 # for one library or object file. The <dt> provides the name of the library or
 194 # object. The <dd> provides a list of the libraries/objects it depends on.
 195 sub gen_one_entry {
 196   my $lib = $_[0];
 197   my $lib_ns = $lib;
 198   $lib_ns =~ s/(.*)\.[oa]/$1/;
 199   if ($FLAT) {
 200     print "$lib:";
 201     if ($WHY) { print "\n"; }
 202   } else {
 203     print "  <dt><b>$lib</b></dt><dd><ul>\n";
 204   }
 205   open UNDEFS,
 206     "$nmPath -u $Directory/$lib | sed -e 's/^[ 0]* U //' | sort | uniq |";
 207   my %DepLibs;
 208   while (<UNDEFS>) {
 209     chomp;
 210     my $lib_printed = 0;
 211     if (defined($libdefs{$_}) && $libdefs{$_} ne $lib) {
 212       $DepLibs{$libdefs{$_}} = [] unless exists $DepLibs{$libdefs{$_}};
 213       push(@{$DepLibs{$libdefs{$_}}}, $_);
 214     } elsif (defined($objdefs{$_}) && $objdefs{$_} ne $lib) {
 215       if ($PEROBJ && !$PEROBJINCL) {
 216         # -perobjincl makes .a files depend on .o files they contain themselves
 217         # default is don't depend on these.
 218         next if defined $libobjs{$lib}{$objdefs{$_}};
 219       }
 220       my $libroot = $lib;
 221       $libroot =~ s/lib(.*).a/$1/;
 222       if ($objdefs{$_} ne "$libroot.o") {
 223         $DepLibs{$objdefs{$_}} = [] unless exists $DepLibs{$objdefs{$_}};
 224         push(@{$DepLibs{$objdefs{$_}}}, $_);
 225       }
 226     }
 227   }
 228   close UNDEFS or die "nm failed";
 229   unless(keys %DepLibs) {
 230     # above failed
 231     open UNDEFS, "$nmPath -u $Directory/$lib |";
 232     while (<UNDEFS>) {
 233       # to bypass non-working sed
 234       if ('  ' eq substr($_,0,2) and index($_,'U ')) {
 235         $_ = substr($_,index($_,'U ')+2)
 236       };
 237       $_ = substr($_,index($_,'  *U ')+5) if -1!=index($_,'  *U ');
 238
 239       chomp;
 240       my $lib_printed = 0;
 241       if (defined($libdefs{$_}) && $libdefs{$_} ne $lib) {
 242         $DepLibs{$libdefs{$_}} = [] unless exists $DepLibs{$libdefs{$_}};
 243         push(@{$DepLibs{$libdefs{$_}}}, $_);
 244       } elsif (defined($objdefs{$_}) && $objdefs{$_} ne $lib) {
 245         my $libroot = $lib;
 246         $libroot =~ s/lib(.*).a/$1/;
 247         if ($objdefs{$_} ne "$libroot.o") {
 248           $DepLibs{$objdefs{$_}} = [] unless exists $DepLibs{$objdefs{$_}};
 249           push(@{$DepLibs{$objdefs{$_}}}, $_);
 250         }
 251       }
 252     }
 253     close UNDEFS or die "nm failed";
 254   }
 255   if ($PEROBJINCL) {
 256      # include the .a's objects
 257      for my $obj (keys %{$libobjs{$lib}}) {
 258         $DepLibs{$obj} = ["<.a object>"] unless exists $DepLibs{$obj};
 259      }
 260      my $madechange = 1;
 261      while($madechange) {
 262       $madechange = 0;
 263       my %temp = %DepLibs;
 264       foreach my $obj (keys %DepLibs) {
 265         foreach my $objdeps (keys %{$objdeps{$obj}}) {
 266           next if defined $temp{$objdeps};
 267           push(@{$temp{$objdeps}}, $obj);
 268           $madechange = 1;
 269         }
 270       }
 271       %DepLibs = %temp;
 272      }
 273   }
 274
 275   for my $key (sort keys %DepLibs) {
 276     if ($FLAT) {
 277       print " $key";
 278       if ($WHY) {
 279         print "\n";
 280         my @syms = @{$DepLibs{$key}};
 281         foreach my $sym (@syms) {
 282           print "  $sym\n";
 283         }
 284       }
 285     } else {
 286       print "    <li>$key</li>\n";
 287     }
 288     my $suffix = substr($key,length($key)-1,1);
 289     $key =~ s/(.*)\.[oa]/$1/;
 290     if ($suffix eq "a") {
 291       if (!$FLAT) { print DOT "$lib_ns -> $key [ weight=0 ];\n" };
 292     } else {
 293       if (!$FLAT) { print DOT "$lib_ns -> $key [ weight=10];\n" };
 294     }
 295   }
 296   if ($FLAT) {
 297     if (!$WHY) {
 298       print "\n";
 299     }
 300   } else {
 301     print "  </ul></dd>\n";
 302   }
 303 }
 304
 305 # Make sure we flush on write. This is slower but correct based on the way we
 306 # write I/O in gen_one_entry.
 307 $| = 1;
 308
 309 # Print the definition list tag
 310 if (!$FLAT) {
 311     print "<dl>\n";
 312
 313   open DOT, "| $DotPath -Tgif > libdeps.gif";
 314
 315   print DOT "digraph LibDeps {\n";
 316   print DOT "  size=\"40,15\"; \n";
 317   print DOT "  ratio=\"1.33333\"; \n";
 318   print DOT "  margin=\"0.25\"; \n";
 319   print DOT "  rankdir=\"LR\"; \n";
 320   print DOT "  mclimit=\"50.0\"; \n";
 321   print DOT "  ordering=\"out\"; \n";
 322   print DOT "  center=\"1\";\n";
 323   print DOT "node [shape=\"box\",\n";
 324   print DOT "      color=\"#000088\",\n";
 325   print DOT "      fillcolor=\"#FFFACD\",\n";
 326   print DOT "      fontcolor=\"#3355BB\",\n";
 327   print DOT "      style=\"filled\",\n";
 328   print DOT "      fontname=\"sans\",\n";
 329   print DOT "      fontsize=\"24\"\n";
 330   print DOT "];\n";
 331   print DOT "edge [dir=\"forward\",style=\"solid\",color=\"#000088\"];\n";
 332 }
 333
 334 # Print libraries first
 335 foreach my $lib (@libs) {
 336   gen_one_entry($lib);
 337 }
 338
 339 if ($PEROBJ) {
 340   foreach my $obj (keys %objdeps) {
 341      print "$obj:";
 342      if (!$PEROBJINCL) {
 343       foreach my $dep (keys %{$objdeps{$obj}}) {
 344           print " $dep";
 345       }
 346     }
 347      print "\n";
 348   }
 349 }
 350
 351 if (!$FLAT) {
 352   print DOT "}\n";
 353   close DOT;
 354   open DOT, "| $DotPath -Tgif > objdeps.gif";
 355   print DOT "digraph ObjDeps {\n";
 356   print DOT "  size=\"8,10\";\n";
 357   print DOT "  margin=\"0.25\";\n";
 358   print DOT "  rankdir=\"LR\";\n";
 359   print DOT "  mclimit=\"50.0\";\n";
 360   print DOT "  ordering=\"out\";\n";
 361   print DOT "  center=\"1\";\n";
 362   print DOT "node [shape=\"box\",\n";
 363   print DOT "      color=\"#000088\",\n";
 364   print DOT "      fillcolor=\"#FFFACD\",\n";
 365   print DOT "      fontcolor=\"#3355BB\",\n";
 366   print DOT "      fontname=\"sans\",\n";
 367   print DOT "      style=\"filled\",\n";
 368   print DOT "      fontsize=\"24\"\n";
 369   print DOT "];\n";
 370   print DOT "edge [dir=\"forward\",style=\"solid\",color=\"#000088\"];\n";
 371 }
 372
 373 # Print objects second
 374 foreach my $obj (@objs) {
 375   gen_one_entry($obj);
 376 }
 377
 378 if (!$FLAT) {
 379   print DOT "}\n";
 380   close DOT;
 381
 382 # Print end tag of definition list element
 383   print "</dl>\n";
 384 }