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https://github.com/golang/go
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95 lines
2.5 KiB
Perl
Executable File
95 lines
2.5 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 emits the errors which we
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# expect. Usage: errchk COMPILER [OPTS] SOURCEFILE. This will run
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# the command COMPILER [OPTS] SOURCEFILE. The compilation is expected
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# to fail; if it succeeds, this script will report an error. The
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# stderr output of the compiler will be matched against comments in
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# SOURCEFILE. For each line of the source file which should generate
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# an error, there should be a comment of the form // ERROR "regexp".
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# If the compiler generates an error for a line which has no such
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# commnt, this script will report an error. Likewise if the compiler
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# does not generate an error for a line which has a comment, or if the
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# error message does not match the <regexp>. The <regexp> syntax
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# 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] SOURCEFILE\n";
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exit 1;
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}
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$file = $ARGV[@ARGV-1];
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open(SRC, $file) || die "BUG: errchk: open $file: $!";
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@src = <SRC>;
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close(SRC);
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# Run command
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$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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$line = 0;
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foreach $src (@src) {
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$line++;
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next unless $src =~ m|// ERROR (.*)|;
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$regexp = $1;
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if($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 = $1;
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@errmsg = grep { /$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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next;
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}
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}
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if(@out != 0) {
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bug();
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print STDERR "errchk: $file: 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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