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      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 }
    385