mirror of
https://github.com/golang/go
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130 lines
3.2 KiB
Perl
Executable File
130 lines
3.2 KiB
Perl
Executable File
#!/usr/bin/perl
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# Copyright 2009 The Go Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style
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# license that can be found in the LICENSE file.
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# This script checks that the compilers emit the errors which we expect.
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# Usage: errchk COMPILER [OPTS] SOURCEFILES. This will run the command
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# COMPILER [OPTS] SOURCEFILES. The compilation is expected to fail; if
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# it succeeds, this script will report an error. The stderr output of
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# the compiler will be matched against comments in SOURCEFILES. For each
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# line of the source files which should generate an error, there should
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# be a comment of the form // ERROR "regexp". If the compiler generates
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# an error for a line which has no such comment, this script will report
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# an error. Likewise if the compiler does not generate an error for a
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# line which has a comment, or if the error message does not match the
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# <regexp>. The <regexp> syntax is Perl but its best to stick to egrep.
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use POSIX;
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if(@ARGV < 1) {
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print STDERR "Usage: errchk COMPILER [OPTS] SOURCEFILES\n";
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exit 1;
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}
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# Grab SOURCEFILES
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foreach(reverse 0 .. @ARGV-1) {
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unless($ARGV[$_] =~ /\.go$/) {
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@file = @ARGV[$_+1 .. @ARGV-1];
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last;
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}
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}
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foreach $file (@file) {
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open(SRC, $file) || die "BUG: errchk: open $file: $!";
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$src{$file} = [<SRC>];
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close(SRC);
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}
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# Run command
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$cmd = join(' ', @ARGV);
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open(CMD, "exec $cmd </dev/null 2>&1 |") || die "BUG: errchk: run $cmd: $!";
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# 6g error messages continue onto additional lines with leading tabs.
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# Split the output at the beginning of each line that doesn't begin with a tab.
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$out = join('', <CMD>);
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@out = split(/^(?!\t)/m, $out);
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close CMD;
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if($? == 0) {
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print STDERR "BUG: errchk: command succeeded unexpectedly\n";
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print STDERR @out;
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exit 0;
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}
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if(!WIFEXITED($?)) {
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print STDERR "BUG: errchk: compiler crashed\n";
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print STDERR @out, "\n";
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exit 0;
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}
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sub bug() {
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if(!$bug++) {
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print STDERR "BUG: ";
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}
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}
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sub chk {
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my $file = shift;
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my $line = 0;
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my $regexp;
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my @errmsg;
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my @match;
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foreach my $src (@{$src{$file}}) {
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$line++;
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next if $src =~ m|////|; # double comment disables ERROR
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next unless $src =~ m|// (GC_)?ERROR (.*)|;
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$regexp = $2;
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if($regexp !~ /^"([^"]*)"/) {
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print STDERR "$file:$line: malformed regexp\n";
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next;
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}
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$regexp = $1;
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# Turn relative line number in message into absolute line number.
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if($regexp =~ /LINE(([+-])([0-9]+))?/) {
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my $n = $line;
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if(defined($1)) {
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if($2 eq "+") {
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$n += int($3);
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} else {
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$n -= int($3);
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}
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}
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$regexp = "$`$file:$n$'";
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}
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@errmsg = grep { /$file:$line[:[]/ } @out;
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@out = grep { !/$file:$line[:[]/ } @out;
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if(@errmsg == 0) {
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bug();
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print STDERR "errchk: $file:$line: missing expected error: '$regexp'\n";
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next;
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}
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@match = grep { /$regexp/ } @errmsg;
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if(@match == 0) {
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bug();
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print STDERR "errchk: $file:$line: error message does not match '$regexp'\n";
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foreach my $l (@errmsg) {
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print STDERR "> $l";
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}
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next;
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}
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}
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}
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foreach $file (@file) {
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chk($file)
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}
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if(@out != 0) {
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bug();
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print STDERR "errchk: unmatched error messages:\n";
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print STDERR "==================================================\n";
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print STDERR @out;
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print STDERR "==================================================\n";
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}
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exit 0;
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