Commit | Line | Data |
a798dbf2 |
1 | # B.pm |
2 | # |
3 | # Copyright (c) 1996, 1997 Malcolm Beattie |
4 | # |
5 | # You may distribute under the terms of either the GNU General Public |
6 | # License or the Artistic License, as specified in the README file. |
7 | # |
8 | package B; |
9 | require DynaLoader; |
10 | require Exporter; |
11 | @ISA = qw(Exporter DynaLoader); |
12 | @EXPORT_OK = qw(byteload_fh byteload_string minus_c ppname |
13 | class peekop cast_I32 cstring cchar hash threadsv_names |
14 | main_root main_start main_cv svref_2object |
15 | walkoptree walkoptree_slow walkoptree_exec walksymtable |
16 | parents comppadlist sv_undef compile_stats timing_info); |
17 | |
18 | use strict; |
19 | @B::SV::ISA = 'B::OBJECT'; |
20 | @B::NULL::ISA = 'B::SV'; |
21 | @B::PV::ISA = 'B::SV'; |
22 | @B::IV::ISA = 'B::SV'; |
23 | @B::NV::ISA = 'B::IV'; |
24 | @B::RV::ISA = 'B::SV'; |
25 | @B::PVIV::ISA = qw(B::PV B::IV); |
26 | @B::PVNV::ISA = qw(B::PV B::NV); |
27 | @B::PVMG::ISA = 'B::PVNV'; |
28 | @B::PVLV::ISA = 'B::PVMG'; |
29 | @B::BM::ISA = 'B::PVMG'; |
30 | @B::AV::ISA = 'B::PVMG'; |
31 | @B::GV::ISA = 'B::PVMG'; |
32 | @B::HV::ISA = 'B::PVMG'; |
33 | @B::CV::ISA = 'B::PVMG'; |
276493cb |
34 | @B::IO::ISA = 'B::PVMG'; |
35 | @B::FM::ISA = 'B::CV'; |
a798dbf2 |
36 | |
37 | @B::OP::ISA = 'B::OBJECT'; |
38 | @B::UNOP::ISA = 'B::OP'; |
39 | @B::BINOP::ISA = 'B::UNOP'; |
40 | @B::LOGOP::ISA = 'B::UNOP'; |
41 | @B::CONDOP::ISA = 'B::UNOP'; |
42 | @B::LISTOP::ISA = 'B::BINOP'; |
43 | @B::SVOP::ISA = 'B::OP'; |
44 | @B::GVOP::ISA = 'B::OP'; |
45 | @B::PVOP::ISA = 'B::OP'; |
46 | @B::CVOP::ISA = 'B::OP'; |
47 | @B::LOOP::ISA = 'B::LISTOP'; |
48 | @B::PMOP::ISA = 'B::LISTOP'; |
49 | @B::COP::ISA = 'B::OP'; |
50 | |
51 | @B::SPECIAL::ISA = 'B::OBJECT'; |
52 | |
53 | { |
54 | # Stop "-w" from complaining about the lack of a real B::OBJECT class |
55 | package B::OBJECT; |
56 | } |
57 | |
58 | my $debug; |
59 | my $op_count = 0; |
60 | my @parents = (); |
61 | |
62 | sub debug { |
63 | my ($class, $value) = @_; |
64 | $debug = $value; |
65 | walkoptree_debug($value); |
66 | } |
67 | |
68 | # sub OPf_KIDS; |
69 | # add to .xs for perl5.002 |
70 | sub OPf_KIDS () { 4 } |
71 | |
72 | sub class { |
73 | my $obj = shift; |
74 | my $name = ref $obj; |
75 | $name =~ s/^.*:://; |
76 | return $name; |
77 | } |
78 | |
79 | sub parents { \@parents } |
80 | |
81 | # For debugging |
82 | sub peekop { |
83 | my $op = shift; |
84 | return sprintf("%s (0x%x) %s", class($op), $$op, $op->ppaddr); |
85 | } |
86 | |
87 | sub walkoptree_slow { |
88 | my($op, $method, $level) = @_; |
89 | $op_count++; # just for statistics |
90 | $level ||= 0; |
91 | warn(sprintf("walkoptree: %d. %s\n", $level, peekop($op))) if $debug; |
92 | $op->$method($level); |
93 | if ($$op && ($op->flags & OPf_KIDS)) { |
94 | my $kid; |
95 | unshift(@parents, $op); |
96 | for ($kid = $op->first; $$kid; $kid = $kid->sibling) { |
97 | walkoptree_slow($kid, $method, $level + 1); |
98 | } |
99 | shift @parents; |
100 | } |
101 | } |
102 | |
103 | sub compile_stats { |
104 | return "Total number of OPs processed: $op_count\n"; |
105 | } |
106 | |
107 | sub timing_info { |
108 | my ($sec, $min, $hr) = localtime; |
109 | my ($user, $sys) = times; |
110 | sprintf("%02d:%02d:%02d user=$user sys=$sys", |
111 | $hr, $min, $sec, $user, $sys); |
112 | } |
113 | |
114 | my %symtable; |
115 | sub savesym { |
116 | my ($obj, $value) = @_; |
117 | # warn(sprintf("savesym: sym_%x => %s\n", $$obj, $value)); # debug |
118 | $symtable{sprintf("sym_%x", $$obj)} = $value; |
119 | } |
120 | |
121 | sub objsym { |
122 | my $obj = shift; |
123 | return $symtable{sprintf("sym_%x", $$obj)}; |
124 | } |
125 | |
126 | sub walkoptree_exec { |
127 | my ($op, $method, $level) = @_; |
128 | my ($sym, $ppname); |
129 | my $prefix = " " x $level; |
130 | for (; $$op; $op = $op->next) { |
131 | $sym = objsym($op); |
132 | if (defined($sym)) { |
133 | print $prefix, "goto $sym\n"; |
134 | return; |
135 | } |
136 | savesym($op, sprintf("%s (0x%lx)", class($op), $$op)); |
137 | $op->$method($level); |
138 | $ppname = $op->ppaddr; |
139 | if ($ppname =~ /^pp_(or|and|mapwhile|grepwhile|entertry)$/) { |
140 | print $prefix, uc($1), " => {\n"; |
141 | walkoptree_exec($op->other, $method, $level + 1); |
142 | print $prefix, "}\n"; |
143 | } elsif ($ppname eq "pp_match" || $ppname eq "pp_subst") { |
144 | my $pmreplstart = $op->pmreplstart; |
145 | if ($$pmreplstart) { |
146 | print $prefix, "PMREPLSTART => {\n"; |
147 | walkoptree_exec($pmreplstart, $method, $level + 1); |
148 | print $prefix, "}\n"; |
149 | } |
150 | } elsif ($ppname eq "pp_substcont") { |
151 | print $prefix, "SUBSTCONT => {\n"; |
152 | walkoptree_exec($op->other->pmreplstart, $method, $level + 1); |
153 | print $prefix, "}\n"; |
154 | $op = $op->other; |
155 | } elsif ($ppname eq "pp_cond_expr") { |
156 | # pp_cond_expr never returns op_next |
157 | print $prefix, "TRUE => {\n"; |
158 | walkoptree_exec($op->true, $method, $level + 1); |
159 | print $prefix, "}\n"; |
160 | $op = $op->false; |
161 | redo; |
162 | } elsif ($ppname eq "pp_range") { |
163 | print $prefix, "TRUE => {\n"; |
164 | walkoptree_exec($op->true, $method, $level + 1); |
165 | print $prefix, "}\n", $prefix, "FALSE => {\n"; |
166 | walkoptree_exec($op->false, $method, $level + 1); |
167 | print $prefix, "}\n"; |
168 | } elsif ($ppname eq "pp_enterloop") { |
169 | print $prefix, "REDO => {\n"; |
170 | walkoptree_exec($op->redoop, $method, $level + 1); |
171 | print $prefix, "}\n", $prefix, "NEXT => {\n"; |
172 | walkoptree_exec($op->nextop, $method, $level + 1); |
173 | print $prefix, "}\n", $prefix, "LAST => {\n"; |
174 | walkoptree_exec($op->lastop, $method, $level + 1); |
175 | print $prefix, "}\n"; |
176 | } elsif ($ppname eq "pp_subst") { |
177 | my $replstart = $op->pmreplstart; |
178 | if ($$replstart) { |
179 | print $prefix, "SUBST => {\n"; |
180 | walkoptree_exec($replstart, $method, $level + 1); |
181 | print $prefix, "}\n"; |
182 | } |
183 | } |
184 | } |
185 | } |
186 | |
187 | sub walksymtable { |
188 | my ($symref, $method, $recurse, $prefix) = @_; |
189 | my $sym; |
190 | no strict 'vars'; |
191 | local(*glob); |
192 | while (($sym, *glob) = each %$symref) { |
193 | if ($sym =~ /::$/) { |
194 | $sym = $prefix . $sym; |
195 | if ($sym ne "main::" && &$recurse($sym)) { |
196 | walksymtable(\%glob, $method, $recurse, $sym); |
197 | } |
198 | } else { |
199 | svref_2object(\*glob)->EGV->$method(); |
200 | } |
201 | } |
202 | } |
203 | |
204 | { |
205 | package B::Section; |
206 | my $output_fh; |
207 | my %sections; |
208 | |
209 | sub new { |
210 | my ($class, $section, $symtable, $default) = @_; |
211 | $output_fh ||= FileHandle->new_tmpfile; |
212 | my $obj = bless [-1, $section, $symtable, $default], $class; |
213 | $sections{$section} = $obj; |
214 | return $obj; |
215 | } |
216 | |
217 | sub get { |
218 | my ($class, $section) = @_; |
219 | return $sections{$section}; |
220 | } |
221 | |
222 | sub add { |
223 | my $section = shift; |
224 | while (defined($_ = shift)) { |
225 | print $output_fh "$section->[1]\t$_\n"; |
226 | $section->[0]++; |
227 | } |
228 | } |
229 | |
230 | sub index { |
231 | my $section = shift; |
232 | return $section->[0]; |
233 | } |
234 | |
235 | sub name { |
236 | my $section = shift; |
237 | return $section->[1]; |
238 | } |
239 | |
240 | sub symtable { |
241 | my $section = shift; |
242 | return $section->[2]; |
243 | } |
244 | |
245 | sub default { |
246 | my $section = shift; |
247 | return $section->[3]; |
248 | } |
249 | |
250 | sub output { |
251 | my ($section, $fh, $format) = @_; |
252 | my $name = $section->name; |
253 | my $sym = $section->symtable || {}; |
254 | my $default = $section->default; |
255 | |
256 | seek($output_fh, 0, 0); |
257 | while (<$output_fh>) { |
258 | chomp; |
259 | s/^(.*?)\t//; |
260 | if ($1 eq $name) { |
261 | s{(s\\_[0-9a-f]+)} { |
262 | exists($sym->{$1}) ? $sym->{$1} : $default; |
263 | }ge; |
264 | printf $fh $format, $_; |
265 | } |
266 | } |
267 | } |
268 | } |
269 | |
270 | bootstrap B; |
271 | |
272 | 1; |
7f20e9dd |
273 | |
274 | __END__ |
275 | |
276 | =head1 NAME |
277 | |
278 | B - The Perl Compiler |
279 | |
280 | =head1 SYNOPSIS |
281 | |
282 | use B; |
283 | |
284 | =head1 DESCRIPTION |
285 | |
286 | See F<ext/B/README>. |
287 | |
288 | =head1 AUTHOR |
289 | |
290 | Malcolm Beattie, C<mbeattie@sable.ox.ac.uk> |
291 | |
292 | =cut |