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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#
11use strict;
12use warnings;
13# Parse arguments...
14my $FLAT = 0;
15my $WHY = 0;
16my $PEROBJ = 0;
17my $PEROBJINCL = 0;
18while (scalar(@ARGV) and ($_ = $ARGV[0], /^[-+]/)) {
19  shift;
20  last if /^--$/;  # 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.
31my $Directory = $ARGV[0];
32if (!defined($Directory) || ! -d "$Directory") {
33  die "First argument must specify the directory containing LLVM libs\n";
34}
35
36my $nmPath = $ARGV[1];
37
38# Find the "dot" program
39my $DotPath="";
40if (!$FLAT) {
41  chomp($DotPath = `which dot`);
42  die "Can't find 'dot'" if (! -x "$DotPath");
43}
44
45if (defined($ENV{NM})) {
46  chomp($nmPath=$ENV{NM});
47}
48
49if (!defined($nmPath) || $nmPath eq "") {
50  chomp($nmPath=`which nm`);
51  die "Can't find 'nm'" if (! -x "$nmPath");
52}
53
54my $ranlibPath;
55if ($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 "$ranlibPath");
64  }
65}
66
67# Open the directory and read its contents, sorting by name and differentiating
68# by whether its a library (.a) or an object file (.o)
69opendir DIR,$Directory;
70my @files = readdir DIR;
71closedir DIR;
72my @libs = grep(/libLLVM.*\.(dylib|so|a)$/,sort(@files));
73# Omit the all-of-llvm shared library.
74@libs = grep(!/libLLVM-\d\.\d(svn)?\.(dylib|so)/, @libs);
75my @objs = grep(/LLVM.*\.o$/,sort(@files));
76
77# Declare the hashes we will use to keep track of the library and object file
78# symbol definitions.
79my %libdefs;
80my %objdefs;
81
82my %libobjs;
83my %objdeps=();
84# Gather library definitions at object file granularity (optional)
85if ($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/IR/;
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
166foreach 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.
180foreach 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.
195sub 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
310if (!$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
335foreach my $lib (@libs) {
336  gen_one_entry($lib);
337}
338
339if ($PEROBJ) {
340  foreach my $obj (keys %objdeps) {
341     print "$obj:";
342     if (!$PEROBJINCL) {
343      foreach my $dep (keys %{$objdeps{$obj}}) {
344          print " $dep";
345      }
346    }
347     print "\n";
348  }
349}
350
351if (!$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
374foreach my $obj (@objs) {
375  gen_one_entry($obj);
376}
377
378if (!$FLAT) {
379  print DOT "}\n";
380  close DOT;
381
382# Print end tag of definition list element
383  print "</dl>\n";
384}
385