1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
| #!/usr/dcs/software/supported/bin/perl -w
# LLVM Web Demo script
#
use strict;
use CGI;
use POSIX;
use Mail::Send;
$| = 1;
my $ROOT = "/tmp/webcompile";
#my $ROOT = "/home/vadve/lattner/webcompile";
open( STDERR, ">&STDOUT" ) or die "can't redirect stderr to stdout";
if ( !-d $ROOT ) { mkdir( $ROOT, 0777 ); }
my $LOGFILE = "$ROOT/log.txt";
my $FORM_URL = 'index.cgi';
my $MAILADDR = 'sabre@nondot.org';
my $CONTACT_ADDRESS = 'Questions or comments? Email the <a href="http://lists.llvm.org/mailman/listinfo/llvm-dev">LLVM-dev mailing list</a>.';
my $LOGO_IMAGE_URL = 'cathead.png';
my $TIMEOUTAMOUNT = 20;
$ENV{'LD_LIBRARY_PATH'} = '/home/vadve/shared/localtools/fc1/lib/';
my @PREPENDPATHDIRS =
(
'/home/vadve/shared/llvm-gcc4.0-2.1/bin/',
'/home/vadve/shared/llvm-2.1/Release/bin');
my $defaultsrc = "#include <stdio.h>\n#include <stdlib.h>\n\n" .
"int power(int X) {\n if (X == 0) return 1;\n" .
" return X*power(X-1);\n}\n\n" .
"int main(int argc, char **argv) {\n" .
" printf(\"%d\\n\", power(atoi(argv[0])));\n}\n";
sub getname {
my ($extension) = @_;
for ( my $count = 0 ; ; $count++ ) {
my $name =
sprintf( "$ROOT/_%d_%d%s", $$, $count, $extension );
if ( !-f $name ) { return $name; }
}
}
my $c;
sub barf {
print "<b>", @_, "</b>\n";
print $c->end_html;
system("rm -f $ROOT/locked");
exit 1;
}
sub writeIntoFile {
my $extension = shift @_;
my $contents = join "", @_;
my $name = getname($extension);
local (*FILE);
open( FILE, ">$name" ) or barf("Can't write to $name: $!");
print FILE $contents;
close FILE;
return $name;
}
sub addlog {
my ( $source, $pid, $result ) = @_;
open( LOG, ">>$LOGFILE" );
my $time = scalar localtime;
my $remotehost = $ENV{'REMOTE_ADDR'};
print LOG "[$time] [$remotehost]: $pid\n";
print LOG "<<<\n$source\n>>>\nResult is: <<<\n$result\n>>>\n";
close LOG;
}
sub dumpFile {
my ( $header, $file ) = @_;
my $result;
open( FILE, "$file" ) or barf("Can't read $file: $!");
while (<FILE>) {
$result .= $_;
}
close FILE;
my $UnhilightedResult = $result;
my $HtmlResult =
"<h3>$header</h3>\n<pre>\n" . $c->escapeHTML($result) . "\n</pre>\n";
if (wantarray) {
return ( $UnhilightedResult, $HtmlResult );
}
else {
return $HtmlResult;
}
}
sub syntaxHighlightLLVM {
my ($input) = @_;
$input =~ s@\b(void|i8|i1|i16|i32|i64|float|double|type|label|opaque)\b@<span class="llvm_type">$1</span>@g;
$input =~ s@\b(add|sub|mul|div|rem|and|or|xor|setne|seteq|setlt|setgt|setle|setge|phi|tail|call|cast|to|shl|shr|vaarg|vanext|ret|br|switch|invoke|unwind|malloc|alloca|free|load|store|getelementptr|begin|end|true|false|declare|global|constant|const|internal|uninitialized|external|implementation|linkonce|weak|appending|null|to|except|not|target|endian|pointersize|big|little|volatile)\b@<span class="llvm_keyword">$1</span>@g;
# Add links to the FAQ.
$input =~ s@(_ZNSt8ios_base4Init[DC]1Ev)@<a href="../docs/FAQ.html#iosinit">$1</a>@g;
$input =~ s@\bundef\b@<a href="../docs/FAQ.html#undef">undef</a>@g;
return $input;
}
sub mailto {
my ( $recipient, $body ) = @_;
my $msg =
new Mail::Send( Subject => "LLVM Demo Page Run", To => $recipient );
my $fh = $msg->open();
print $fh $body;
$fh->close();
}
$c = new CGI;
print $c->header;
print <<EOF;
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>Try out LLVM in your browser!</title>
<style>
\@import url("syntax.css");
\@import url("http://llvm.org/llvm.css");
</style>
</head>
<body leftmargin="10" marginwidth="10">
<div class="www_sectiontitle">
Try out LLVM in your browser!
</div>
<table border=0><tr><td>
<img align=right width=100 height=111 src="$LOGO_IMAGE_URL">
</td><td>
EOF
if ( -f "$ROOT/locked" ) {
my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,$atime,$locktime) =
stat("$ROOT/locked");
my $currtime = time();
if ($locktime + 60 > $currtime) {
print "This page is already in use by someone else at this ";
print "time, try reloading in a second or two. Meow!</td></tr></table>'\n";
exit 0;
}
}
system("touch $ROOT/locked");
print <<END;
Bitter Melon the cat says, paste a C/C++ program in the text box or upload
one from your computer, and you can see LLVM compile it, meow!!
</td></tr></table><p>
END
print $c->start_multipart_form( 'POST', $FORM_URL );
my $source = $c->param('source');
# Start the user out with something valid if no code.
$source = $defaultsrc if (!defined($source));
print '<table border="0"><tr><td>';
print "Type your source code in below: (<a href='DemoInfo.html#hints'>hints and
advice</a>)<br>\n";
print $c->textarea(
-name => "source",
-rows => 16,
-columns => 60,
-default => $source
), "<br>";
print "Or upload a file: ";
print $c->filefield( -name => 'uploaded_file', -default => '' );
print "<p />\n";
print '<p></td><td valign=top>';
print "<center><h3>General Options</h3></center>";
print "Source language: ",
$c->radio_group(
-name => 'language',
-values => [ 'C', 'C++' ],
-default => 'C'
), "<p>";
print $c->checkbox(
-name => 'linkopt',
-label => 'Run link-time optimizer',
-checked => 'checked'
),' <a href="DemoInfo.html#lto">?</a><br>';
print $c->checkbox(
-name => 'showstats',
-label => 'Show detailed pass statistics'
), ' <a href="DemoInfo.html#stats">?</a><br>';
print $c->checkbox(
-name => 'cxxdemangle',
-label => 'Demangle C++ names'
),' <a href="DemoInfo.html#demangle">?</a><p>';
print "<center><h3>Output Options</h3></center>";
print $c->checkbox(
-name => 'showbcanalysis',
-label => 'Show detailed bytecode analysis'
),' <a href="DemoInfo.html#bcanalyzer">?</a><br>';
print $c->checkbox(
-name => 'showllvm2cpp',
-label => 'Show LLVM C++ API code'
), ' <a href="DemoInfo.html#llvm2cpp">?</a>';
print "</td></tr></table>";
print "<center>", $c->submit(-value=> 'Compile Source Code'),
"</center>\n", $c->endform;
print "\n<p>If you have questions about the LLVM code generated by the
front-end, please check the <a href='/docs/FAQ.html#cfe_code'>FAQ</a> and
the demo page <a href='DemoInfo.html#hints'>hints section</a>.
</p>\n";
$ENV{'PATH'} = ( join ( ':', @PREPENDPATHDIRS ) ) . ":" . $ENV{'PATH'};
sub sanitychecktools {
my $sanitycheckfail = '';
# insert tool-specific sanity checks here
$sanitycheckfail .= ' llvm-dis'
if `llvm-dis --help 2>&1` !~ /ll disassembler/;
$sanitycheckfail .= ' llvm-gcc'
if ( `llvm-gcc --version 2>&1` !~ /Free Software Foundation/ );
$sanitycheckfail .= ' llvm-ld'
if `llvm-ld --help 2>&1` !~ /llvm linker/;
$sanitycheckfail .= ' llvm-bcanalyzer'
if `llvm-bcanalyzer --help 2>&1` !~ /bcanalyzer/;
barf(
"<br/>The demo page is currently unavailable. [tools: ($sanitycheckfail ) failed sanity check]"
)
if $sanitycheckfail;
}
sanitychecktools();
sub try_run {
my ( $program, $commandline, $outputFile ) = @_;
my $retcode = 0;
eval {
local $SIG{ALRM} = sub { die "timeout"; };
alarm $TIMEOUTAMOUNT;
$retcode = system($commandline);
alarm 0;
};
if ( $@ and $@ =~ /timeout/ ) {
barf("Program $program took too long, compile time limited for the web script, sorry!\n");
}
if ( -s $outputFile ) {
print scalar dumpFile( "Output from $program", $outputFile );
}
#print "<p>Finished dumping command output.</p>\n";
if ( WIFEXITED($retcode) && WEXITSTATUS($retcode) != 0 ) {
barf(
"$program exited with an error. Please correct source and resubmit.<p>\n" .
"Please note that this form only allows fully formed and correct source" .
" files. It will not compile fragments of code.<p>"
);
}
if ( WIFSIGNALED($retcode) != 0 ) {
my $sig = WTERMSIG($retcode);
barf(
"Ouch, $program caught signal $sig. Sorry, better luck next time!\n"
);
}
}
my %suffixes = (
'Java' => '.java',
'JO99' => '.jo9',
'C' => '.c',
'C++' => '.cc',
'Stacker' => '.st',
'preprocessed C' => '.i',
'preprocessed C++' => '.ii'
);
my %languages = (
'.jo9' => 'JO99',
'.java' => 'Java',
'.c' => 'C',
'.i' => 'preprocessed C',
'.ii' => 'preprocessed C++',
'.cc' => 'C++',
'.cpp' => 'C++',
'.st' => 'Stacker'
);
my $uploaded_file_name = $c->param('uploaded_file');
if ($uploaded_file_name) {
if ($source) {
barf(
"You must choose between uploading a file and typing code in. You can't do both at the same time."
);
}
$uploaded_file_name =~ s/^.*(\.[A-Za-z]+)$/$1/;
my $language = $languages{$uploaded_file_name};
$c->param( 'language', $language );
print "<p>Processing uploaded file. It looks like $language.</p>\n";
my $fh = $c->upload('uploaded_file');
if ( !$fh ) {
barf( "Error uploading file: " . $c->cgi_error );
}
while (<$fh>) {
$source .= $_;
}
close $fh;
}
if ($c->param('source')) {
print $c->hr;
my $extension = $suffixes{ $c->param('language') };
barf "Unknown language; can't compile\n" unless $extension;
# Add a newline to the source here to avoid a warning from gcc.
$source .= "\n";
# Avoid security hole due to #including bad stuff.
$source =~
s@(\n)?#include.*[<"](.*\.\..*)[">].*\n@$1#error "invalid #include file $2 detected"\n@g;
my $inputFile = writeIntoFile( $extension, $source );
my $pid = $$;
my $bytecodeFile = getname(".bc");
my $outputFile = getname(".llvm-gcc.out");
my $timerFile = getname(".llvm-gcc.time");
my $stats = '';
if ( $extension eq ".st" ) {
$stats = "-stats -time-passes "
if ( $c->param('showstats') );
try_run( "llvm Stacker front-end (stkrc)",
"stkrc $stats -o $bytecodeFile $inputFile > $outputFile 2>&1",
$outputFile );
} else {
#$stats = "-Wa,--stats,--time-passes,--info-output-file=$timerFile"
$stats = "-ftime-report"
if ( $c->param('showstats') );
try_run( "llvm C/C++ front-end (llvm-gcc)",
"llvm-gcc -emit-llvm -W -Wall -O2 $stats -o $bytecodeFile -c $inputFile > $outputFile 2>&1",
$outputFile );
}
if ( $c->param('showstats') && -s $timerFile ) {
my ( $UnhilightedResult, $HtmlResult ) =
dumpFile( "Statistics for front-end compilation", $timerFile );
print "$HtmlResult\n";
}
if ( $c->param('linkopt') ) {
my $stats = '';
my $outputFile = getname(".gccld.out");
my $timerFile = getname(".gccld.time");
$stats = "--stats --time-passes --info-output-file=$timerFile"
if ( $c->param('showstats') );
my $tmpFile = getname(".bc");
try_run(
"optimizing linker (llvm-ld)",
"llvm-ld $stats -o=$tmpFile $bytecodeFile > $outputFile 2>&1",
$outputFile
);
system("mv $tmpFile.bc $bytecodeFile");
system("rm $tmpFile");
if ( $c->param('showstats') && -s $timerFile ) {
my ( $UnhilightedResult, $HtmlResult ) =
dumpFile( "Statistics for optimizing linker", $timerFile );
print "$HtmlResult\n";
}
}
print " Bytecode size is ", -s $bytecodeFile, " bytes.\n";
my $disassemblyFile = getname(".ll");
try_run( "llvm-dis",
"llvm-dis -o=$disassemblyFile $bytecodeFile > $outputFile 2>&1",
$outputFile );
if ( $c->param('cxxdemangle') ) {
print " Demangling disassembler output.\n";
my $tmpFile = getname(".ll");
system("c++filt < $disassemblyFile > $tmpFile 2>&1");
system("mv $tmpFile $disassemblyFile");
}
my ( $UnhilightedResult, $HtmlResult );
if ( -s $disassemblyFile ) {
( $UnhilightedResult, $HtmlResult ) =
dumpFile( "Output from LLVM disassembler", $disassemblyFile );
print syntaxHighlightLLVM($HtmlResult);
}
else {
print "<p>Hmm, that's weird, llvm-dis didn't produce any output.</p>\n";
}
if ( $c->param('showbcanalysis') ) {
my $analFile = getname(".bca");
try_run( "llvm-bcanalyzer", "llvm-bcanalyzer $bytecodeFile > $analFile 2>&1",
$analFile);
}
if ($c->param('showllvm2cpp') ) {
my $l2cppFile = getname(".l2cpp");
try_run("llvm2cpp","llvm2cpp $bytecodeFile -o $l2cppFile 2>&1",
$l2cppFile);
}
# Get the source presented by the user to CGI, convert newline sequences to simple \n.
my $actualsrc = $c->param('source');
$actualsrc =~ s/\015\012/\n/go;
# Don't log this or mail it if it is the default code.
if ($actualsrc ne $defaultsrc) {
addlog( $source, $pid, $UnhilightedResult );
my ( $ip, $host, $lg, $lines );
chomp( $lines = `wc -l < $inputFile` );
$lg = $c->param('language');
$ip = $c->remote_addr();
chomp( $host = `host $ip` ) if $ip;
mailto( $MAILADDR,
"--- Query: ---\nFrom: ($ip) $host\nInput: $lines lines of $lg\n"
. "C++ demangle = "
. ( $c->param('cxxdemangle') ? 1 : 0 )
. ", Link opt = "
. ( $c->param('linkopt') ? 1 : 0 ) . "\n\n"
. ", Show stats = "
. ( $c->param('showstats') ? 1 : 0 ) . "\n\n"
. "--- Source: ---\n$source\n"
. "--- Result: ---\n$UnhilightedResult\n" );
}
unlink( $inputFile, $bytecodeFile, $outputFile, $disassemblyFile );
}
print $c->hr, "<address>$CONTACT_ADDRESS</address>", $c->end_html;
system("rm $ROOT/locked");
exit 0;
|