461 lines
14 KiB
Perl
461 lines
14 KiB
Perl
#!/usr/dcs/software/supported/bin/perl -w
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# LLVM Web Demo script
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#
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use strict;
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use CGI;
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use POSIX;
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use Mail::Send;
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$| = 1;
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my $ROOT = "/tmp/webcompile";
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#my $ROOT = "/home/vadve/lattner/webcompile";
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open( STDERR, ">&STDOUT" ) or die "can't redirect stderr to stdout";
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if ( !-d $ROOT ) { mkdir( $ROOT, 0777 ); }
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my $LOGFILE = "$ROOT/log.txt";
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my $FORM_URL = 'index.cgi';
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my $MAILADDR = 'sabre@nondot.org';
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my $CONTACT_ADDRESS = 'Questions or comments? Email the <a href="http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev">LLVMdev mailing list</a>.';
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my $LOGO_IMAGE_URL = 'cathead.png';
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my $TIMEOUTAMOUNT = 20;
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$ENV{'LD_LIBRARY_PATH'} = '/home/vadve/shared/localtools/fc1/lib/';
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my @PREPENDPATHDIRS =
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(
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'/home/vadve/shared/llvm-gcc4.0-2.1/bin/',
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'/home/vadve/shared/llvm-2.1/Release/bin');
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my $defaultsrc = "#include <stdio.h>\n#include <stdlib.h>\n\n" .
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"int power(int X) {\n if (X == 0) return 1;\n" .
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" return X*power(X-1);\n}\n\n" .
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"int main(int argc, char **argv) {\n" .
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" printf(\"%d\\n\", power(atoi(argv[0])));\n}\n";
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sub getname {
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my ($extension) = @_;
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for ( my $count = 0 ; ; $count++ ) {
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my $name =
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sprintf( "$ROOT/_%d_%d%s", $$, $count, $extension );
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if ( !-f $name ) { return $name; }
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}
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}
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my $c;
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sub barf {
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print "<b>", @_, "</b>\n";
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print $c->end_html;
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system("rm -f $ROOT/locked");
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exit 1;
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}
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sub writeIntoFile {
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my $extension = shift @_;
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my $contents = join "", @_;
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my $name = getname($extension);
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local (*FILE);
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open( FILE, ">$name" ) or barf("Can't write to $name: $!");
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print FILE $contents;
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close FILE;
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return $name;
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}
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sub addlog {
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my ( $source, $pid, $result ) = @_;
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open( LOG, ">>$LOGFILE" );
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my $time = scalar localtime;
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my $remotehost = $ENV{'REMOTE_ADDR'};
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print LOG "[$time] [$remotehost]: $pid\n";
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print LOG "<<<\n$source\n>>>\nResult is: <<<\n$result\n>>>\n";
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close LOG;
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}
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sub dumpFile {
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my ( $header, $file ) = @_;
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my $result;
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open( FILE, "$file" ) or barf("Can't read $file: $!");
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while (<FILE>) {
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$result .= $_;
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}
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close FILE;
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my $UnhilightedResult = $result;
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my $HtmlResult =
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"<h3>$header</h3>\n<pre>\n" . $c->escapeHTML($result) . "\n</pre>\n";
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if (wantarray) {
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return ( $UnhilightedResult, $HtmlResult );
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}
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else {
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return $HtmlResult;
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}
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}
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sub syntaxHighlightLLVM {
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my ($input) = @_;
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$input =~ s@\b(void|i8|i1|i16|i32|i64|float|double|type|label|opaque)\b@<span class="llvm_type">$1</span>@g;
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$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;
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# Add links to the FAQ.
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$input =~ s@(_ZNSt8ios_base4Init[DC]1Ev)@<a href="../docs/FAQ.html#iosinit">$1</a>@g;
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$input =~ s@\bundef\b@<a href="../docs/FAQ.html#undef">undef</a>@g;
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return $input;
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}
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sub mailto {
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my ( $recipient, $body ) = @_;
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my $msg =
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new Mail::Send( Subject => "LLVM Demo Page Run", To => $recipient );
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my $fh = $msg->open();
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print $fh $body;
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$fh->close();
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}
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$c = new CGI;
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print $c->header;
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print <<EOF;
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
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<title>Try out LLVM in your browser!</title>
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<style>
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\@import url("syntax.css");
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\@import url("http://llvm.org/llvm.css");
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</style>
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</head>
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<body leftmargin="10" marginwidth="10">
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<div class="www_sectiontitle">
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Try out LLVM in your browser!
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</div>
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<table border=0><tr><td>
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<img align=right width=100 height=111 src="$LOGO_IMAGE_URL">
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</td><td>
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EOF
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if ( -f "$ROOT/locked" ) {
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my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,$atime,$locktime) =
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stat("$ROOT/locked");
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my $currtime = time();
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if ($locktime + 60 > $currtime) {
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print "This page is already in use by someone else at this ";
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print "time, try reloading in a second or two. Meow!</td></tr></table>'\n";
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exit 0;
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}
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}
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system("touch $ROOT/locked");
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print <<END;
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Bitter Melon the cat says, paste a C/C++ program in the text box or upload
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one from your computer, and you can see LLVM compile it, meow!!
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</td></tr></table><p>
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END
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print $c->start_multipart_form( 'POST', $FORM_URL );
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my $source = $c->param('source');
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# Start the user out with something valid if no code.
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$source = $defaultsrc if (!defined($source));
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print '<table border="0"><tr><td>';
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print "Type your source code in below: (<a href='DemoInfo.html#hints'>hints and
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advice</a>)<br>\n";
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print $c->textarea(
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-name => "source",
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-rows => 16,
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-columns => 60,
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-default => $source
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), "<br>";
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print "Or upload a file: ";
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print $c->filefield( -name => 'uploaded_file', -default => '' );
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print "<p />\n";
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print '<p></td><td valign=top>';
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print "<center><h3>General Options</h3></center>";
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print "Source language: ",
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$c->radio_group(
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-name => 'language',
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-values => [ 'C', 'C++' ],
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-default => 'C'
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), "<p>";
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print $c->checkbox(
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-name => 'linkopt',
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-label => 'Run link-time optimizer',
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-checked => 'checked'
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),' <a href="DemoInfo.html#lto">?</a><br>';
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print $c->checkbox(
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-name => 'showstats',
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-label => 'Show detailed pass statistics'
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), ' <a href="DemoInfo.html#stats">?</a><br>';
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print $c->checkbox(
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-name => 'cxxdemangle',
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-label => 'Demangle C++ names'
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),' <a href="DemoInfo.html#demangle">?</a><p>';
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print "<center><h3>Output Options</h3></center>";
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print $c->checkbox(
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-name => 'showbcanalysis',
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-label => 'Show detailed bytecode analysis'
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),' <a href="DemoInfo.html#bcanalyzer">?</a><br>';
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print $c->checkbox(
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-name => 'showllvm2cpp',
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-label => 'Show LLVM C++ API code'
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), ' <a href="DemoInfo.html#llvm2cpp">?</a>';
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print "</td></tr></table>";
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print "<center>", $c->submit(-value=> 'Compile Source Code'),
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"</center>\n", $c->endform;
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print "\n<p>If you have questions about the LLVM code generated by the
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front-end, please check the <a href='/docs/FAQ.html#cfe_code'>FAQ</a> and
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the demo page <a href='DemoInfo.html#hints'>hints section</a>.
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</p>\n";
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$ENV{'PATH'} = ( join ( ':', @PREPENDPATHDIRS ) ) . ":" . $ENV{'PATH'};
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sub sanitychecktools {
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my $sanitycheckfail = '';
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# insert tool-specific sanity checks here
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$sanitycheckfail .= ' llvm-dis'
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if `llvm-dis --help 2>&1` !~ /ll disassembler/;
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$sanitycheckfail .= ' llvm-gcc'
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if ( `llvm-gcc --version 2>&1` !~ /Free Software Foundation/ );
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$sanitycheckfail .= ' llvm-ld'
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if `llvm-ld --help 2>&1` !~ /llvm linker/;
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$sanitycheckfail .= ' llvm-bcanalyzer'
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if `llvm-bcanalyzer --help 2>&1` !~ /bcanalyzer/;
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barf(
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"<br/>The demo page is currently unavailable. [tools: ($sanitycheckfail ) failed sanity check]"
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)
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if $sanitycheckfail;
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}
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sanitychecktools();
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sub try_run {
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my ( $program, $commandline, $outputFile ) = @_;
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my $retcode = 0;
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eval {
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local $SIG{ALRM} = sub { die "timeout"; };
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alarm $TIMEOUTAMOUNT;
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$retcode = system($commandline);
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alarm 0;
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};
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if ( $@ and $@ =~ /timeout/ ) {
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barf("Program $program took too long, compile time limited for the web script, sorry!\n");
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}
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if ( -s $outputFile ) {
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print scalar dumpFile( "Output from $program", $outputFile );
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}
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#print "<p>Finished dumping command output.</p>\n";
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if ( WIFEXITED($retcode) && WEXITSTATUS($retcode) != 0 ) {
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barf(
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"$program exited with an error. Please correct source and resubmit.<p>\n" .
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"Please note that this form only allows fully formed and correct source" .
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" files. It will not compile fragments of code.<p>"
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);
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}
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if ( WIFSIGNALED($retcode) != 0 ) {
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my $sig = WTERMSIG($retcode);
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barf(
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"Ouch, $program caught signal $sig. Sorry, better luck next time!\n"
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);
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}
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}
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my %suffixes = (
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'Java' => '.java',
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'JO99' => '.jo9',
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'C' => '.c',
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'C++' => '.cc',
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'Stacker' => '.st',
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'preprocessed C' => '.i',
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'preprocessed C++' => '.ii'
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);
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my %languages = (
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'.jo9' => 'JO99',
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'.java' => 'Java',
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'.c' => 'C',
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'.i' => 'preprocessed C',
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'.ii' => 'preprocessed C++',
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'.cc' => 'C++',
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'.cpp' => 'C++',
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'.st' => 'Stacker'
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);
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my $uploaded_file_name = $c->param('uploaded_file');
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if ($uploaded_file_name) {
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if ($source) {
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barf(
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"You must choose between uploading a file and typing code in. You can't do both at the same time."
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);
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}
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$uploaded_file_name =~ s/^.*(\.[A-Za-z]+)$/$1/;
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my $language = $languages{$uploaded_file_name};
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$c->param( 'language', $language );
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print "<p>Processing uploaded file. It looks like $language.</p>\n";
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my $fh = $c->upload('uploaded_file');
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if ( !$fh ) {
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barf( "Error uploading file: " . $c->cgi_error );
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}
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while (<$fh>) {
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$source .= $_;
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}
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close $fh;
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}
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if ($c->param('source')) {
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print $c->hr;
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my $extension = $suffixes{ $c->param('language') };
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barf "Unknown language; can't compile\n" unless $extension;
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# Add a newline to the source here to avoid a warning from gcc.
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$source .= "\n";
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# Avoid security hole due to #including bad stuff.
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$source =~
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s@(\n)?#include.*[<"](.*\.\..*)[">].*\n@$1#error "invalid #include file $2 detected"\n@g;
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my $inputFile = writeIntoFile( $extension, $source );
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my $pid = $$;
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my $bytecodeFile = getname(".bc");
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my $outputFile = getname(".llvm-gcc.out");
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my $timerFile = getname(".llvm-gcc.time");
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my $stats = '';
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if ( $extension eq ".st" ) {
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$stats = "-stats -time-passes "
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if ( $c->param('showstats') );
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try_run( "llvm Stacker front-end (stkrc)",
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"stkrc $stats -o $bytecodeFile $inputFile > $outputFile 2>&1",
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$outputFile );
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} else {
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#$stats = "-Wa,--stats,--time-passes,--info-output-file=$timerFile"
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$stats = "-ftime-report"
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if ( $c->param('showstats') );
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try_run( "llvm C/C++ front-end (llvm-gcc)",
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"llvm-gcc -emit-llvm -W -Wall -O2 $stats -o $bytecodeFile -c $inputFile > $outputFile 2>&1",
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$outputFile );
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}
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if ( $c->param('showstats') && -s $timerFile ) {
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my ( $UnhilightedResult, $HtmlResult ) =
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dumpFile( "Statistics for front-end compilation", $timerFile );
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print "$HtmlResult\n";
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}
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if ( $c->param('linkopt') ) {
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my $stats = '';
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my $outputFile = getname(".gccld.out");
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my $timerFile = getname(".gccld.time");
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$stats = "--stats --time-passes --info-output-file=$timerFile"
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if ( $c->param('showstats') );
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my $tmpFile = getname(".bc");
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try_run(
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"optimizing linker (llvm-ld)",
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"llvm-ld $stats -o=$tmpFile $bytecodeFile > $outputFile 2>&1",
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$outputFile
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);
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system("mv $tmpFile.bc $bytecodeFile");
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system("rm $tmpFile");
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if ( $c->param('showstats') && -s $timerFile ) {
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my ( $UnhilightedResult, $HtmlResult ) =
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dumpFile( "Statistics for optimizing linker", $timerFile );
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print "$HtmlResult\n";
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}
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}
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print " Bytecode size is ", -s $bytecodeFile, " bytes.\n";
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my $disassemblyFile = getname(".ll");
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try_run( "llvm-dis",
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"llvm-dis -o=$disassemblyFile $bytecodeFile > $outputFile 2>&1",
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$outputFile );
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if ( $c->param('cxxdemangle') ) {
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print " Demangling disassembler output.\n";
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my $tmpFile = getname(".ll");
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system("c++filt < $disassemblyFile > $tmpFile 2>&1");
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system("mv $tmpFile $disassemblyFile");
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}
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my ( $UnhilightedResult, $HtmlResult );
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if ( -s $disassemblyFile ) {
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( $UnhilightedResult, $HtmlResult ) =
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dumpFile( "Output from LLVM disassembler", $disassemblyFile );
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print syntaxHighlightLLVM($HtmlResult);
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}
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else {
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print "<p>Hmm, that's weird, llvm-dis didn't produce any output.</p>\n";
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}
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if ( $c->param('showbcanalysis') ) {
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my $analFile = getname(".bca");
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try_run( "llvm-bcanalyzer", "llvm-bcanalyzer $bytecodeFile > $analFile 2>&1",
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$analFile);
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}
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if ($c->param('showllvm2cpp') ) {
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my $l2cppFile = getname(".l2cpp");
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try_run("llvm2cpp","llvm2cpp $bytecodeFile -o $l2cppFile 2>&1",
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$l2cppFile);
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}
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# Get the source presented by the user to CGI, convert newline sequences to simple \n.
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my $actualsrc = $c->param('source');
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$actualsrc =~ s/\015\012/\n/go;
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# Don't log this or mail it if it is the default code.
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if ($actualsrc ne $defaultsrc) {
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addlog( $source, $pid, $UnhilightedResult );
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my ( $ip, $host, $lg, $lines );
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chomp( $lines = `wc -l < $inputFile` );
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$lg = $c->param('language');
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$ip = $c->remote_addr();
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chomp( $host = `host $ip` ) if $ip;
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mailto( $MAILADDR,
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"--- Query: ---\nFrom: ($ip) $host\nInput: $lines lines of $lg\n"
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. "C++ demangle = "
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. ( $c->param('cxxdemangle') ? 1 : 0 )
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. ", Link opt = "
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. ( $c->param('linkopt') ? 1 : 0 ) . "\n\n"
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. ", Show stats = "
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. ( $c->param('showstats') ? 1 : 0 ) . "\n\n"
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. "--- Source: ---\n$source\n"
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. "--- Result: ---\n$UnhilightedResult\n" );
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}
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unlink( $inputFile, $bytecodeFile, $outputFile, $disassemblyFile );
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}
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print $c->hr, "<address>$CONTACT_ADDRESS</address>", $c->end_html;
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system("rm $ROOT/locked");
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exit 0;
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