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package sigtrap;
require Carp;
sub import {
my $pack = shift;
my @sigs = @_;
@sigs or @sigs = qw(QUIT ILL TRAP ABRT EMT FPE BUS SEGV SYS PIPE TERM);
foreach $sig (@sigs) {
$SIG{$sig} = 'sigtrap::trap';
}
}
sub trap {
package DB; # To get subroutine args.
$SIG{'ABRT'} = DEFAULT;
kill 'ABRT', $$ if $panic++;
syswrite(STDERR, 'Caught a SIG', 12);
syswrite(STDERR, $_[0], length($_[0]));
syswrite(STDERR, ' at ', 4);
($pack,$file,$line) = caller;
syswrite(STDERR, $file, length($file));
syswrite(STDERR, ' line ', 6);
syswrite(STDERR, $line, length($line));
syswrite(STDERR, "\n", 1);
# Now go for broke.
for ($i = 1; ($p,$f,$l,$s,$h,$w) = caller($i); $i++) {
@a = ();
for $arg (@args) {
$_ = "$arg";
s/'/\\'/g;
s/([^\0]*)/'$1'/
unless /^(?: -?[\d.]+ | \*[\w:]* )$/x;
s/([\200-\377])/sprintf("M-%c",ord($1)&0177)/eg;
s/([\0-\37\177])/sprintf("^%c",ord($1)^64)/eg;
push(@a, $_);
}
$w = $w ? '@ = ' : '$ = ';
$a = $h ? '(' . join(', ', @a) . ')' : '';
$mess = "$w$s$a called from $f line $l\n";
syswrite(STDERR, $mess, length($mess));
}
kill 'ABRT', $$;
}
1;
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