BEGIN {eval 'use IO::Handle'}; # Needed for flush only? breaks under miniperl
# Debugger for Perl 5.00x; perl5db.pl patch level:
-$VERSION = 1.30;
+$VERSION = '1.33';
$header = "perl5db.pl version $VERSION";
# + Added macosx_get_fork_TTY support
# Changes: 1.30: Mar 06, 2007 Andreas Koenig <andk@cpan.org>
# + Added HistFile, HistSize
+# Changes: 1.31
+# + Remove support for assertions and -A
+# + stop NEXT::AUTOLOAD from emitting warnings under the debugger. RT #25053
+# + "update for Mac OS X 10.5" [finding the tty device]
+# + "What I needed to get the forked debugger to work" [on VMS]
+# + [perl #57016] debugger: o warn=0 die=0 ignored
+# + Note, but don't use, PERLDBf_SAVESRC
+# + Fix #7013: lvalue subs not working inside debugger
+# Changes: 1.32: Jun 03, 2009 Jonathan Leto <jonathan@leto.net>
+# + Fix bug where a key _< with undefined value was put into the symbol table
+# + when the $filename variable is not set
########################################################################
=head1 DEBUGGER INITIALIZATION
)
if 0;
+# without threads, $filename is not defined until DB::DB is called
foreach my $k (keys (%INC)) {
- &share(\$main::{'_<'.$filename});
+ &share(\$main::{'_<'.$filename}) if defined $filename;
};
# Command-line + PERLLIB:
This gigantic subroutine is the heart of the debugger. Called before every
statement, its job is to determine if a breakpoint has been reached, and
stop if so; read commands from the user, parse them, and execute
-them, and hen send execution off to the next statement.
+them, and then send execution off to the next statement.
Note that the order in which the commands are processed is very important;
some commands earlier in the loop will actually alter the C<$cmd> variable
} ## end else [ if (wantarray)
} ## end sub sub
+sub lsub : lvalue {
+
+ # lock ourselves under threads
+ lock($DBGR);
+
+ # Whether or not the autoloader was running, a scalar to put the
+ # sub's return value in (if needed), and an array to put the sub's
+ # return value in (if needed).
+ my ( $al, $ret, @ret ) = "";
+ if ($sub =~ /^threads::new$/ && $ENV{PERL5DB_THREADED}) {
+ print "creating new thread\n";
+ }
+
+ # If the last ten characters are C'::AUTOLOAD', note we've traced
+ # into AUTOLOAD for $sub.
+ if ( length($sub) > 10 && substr( $sub, -10, 10 ) eq '::AUTOLOAD' ) {
+ $al = " for $$sub";
+ }
+
+ # We stack the stack pointer and then increment it to protect us
+ # from a situation that might unwind a whole bunch of call frames
+ # at once. Localizing the stack pointer means that it will automatically
+ # unwind the same amount when multiple stack frames are unwound.
+ local $stack_depth = $stack_depth + 1; # Protect from non-local exits
+
+ # Expand @stack.
+ $#stack = $stack_depth;
+
+ # Save current single-step setting.
+ $stack[-1] = $single;
+
+ # Turn off all flags except single-stepping.
+ $single &= 1;
+
+ # If we've gotten really deeply recursed, turn on the flag that will
+ # make us stop with the 'deep recursion' message.
+ $single |= 4 if $stack_depth == $deep;
+
+ # If frame messages are on ...
+ (
+ $frame & 4 # Extended frame entry message
+ ? (
+ print_lineinfo( ' ' x ( $stack_depth - 1 ), "in " ),
+
+ # Why -1? But it works! :-(
+ # Because print_trace will call add 1 to it and then call
+ # dump_trace; this results in our skipping -1+1 = 0 stack frames
+ # in dump_trace.
+ print_trace( $LINEINFO, -1, 1, 1, "$sub$al" )
+ )
+ : print_lineinfo( ' ' x ( $stack_depth - 1 ), "entering $sub$al\n" )
+
+ # standard frame entry message
+ )
+ if $frame;
+
+ # Pop the single-step value back off the stack.
+ $single |= $stack[ $stack_depth-- ];
+
+ # call the original lvalue sub.
+ &$sub;
+}
+
=head1 EXTENDED COMMAND HANDLING AND THE COMMAND API
In Perl 5.8.0, there was a major realignment of the commands and what they did,
}
elsif ($prevwarn) {
$SIG{__WARN__} = $prevwarn;
+ } else {
+ undef $SIG{__WARN__};
}
} ## end if (@_)
$warnLevel;
elsif ($prevdie) {
$SIG{__DIE__} = $prevdie;
print $OUT "Default die handler restored.\n";
+ } else {
+ undef $SIG{__DIE__};
+ print $OUT "Die handler removed.\n";
}
} ## end if (@_)
$dieLevel;
# This is a package that is contributing the methods we're about to print.
my $prefix = shift;
my $prepend = $prefix ? "via $prefix: " : '';
+ my @to_print;
+
+ # Extract from all the symbols in this class.
+ while (my ($name, $glob) = each %{"${class}::"}) {
+ # references directly in the symbol table are Proxy Constant
+ # Subroutines, and are by their very nature defined
+ # Otherwise, check if the thing is a typeglob, and if it is, it decays
+ # to a subroutine reference, which can be tested by defined.
+ # $glob might also be the value -1 (from sub foo;)
+ # or (say) '$$' (from sub foo ($$);)
+ # \$glob will be SCALAR in both cases.
+ if ((ref $glob || ($glob && ref \$glob eq 'GLOB' && defined &$glob))
+ && !$seen{$name}++) {
+ push @to_print, "$prepend$name\n";
+ }
+ }
- my $name;
- for $name (
-
- # Keep if this is a defined subroutine in this class.
- grep { defined &{ ${"${class}::"}{$_} } }
-
- # Extract from all the symbols in this class.
- sort keys %{"${class}::"}
- )
{
-
- # If we printed this already, skip it.
- next if $seen{$name}++;
-
- # Print the new method name.
- local $\ = '';
- local $, = '';
- print $DB::OUT "$prepend$name\n";
- } ## end for $name (grep { defined...
+ local $\ = '';
+ local $, = '';
+ print $DB::OUT $_ foreach sort @to_print;
+ }
# If the $crawl_upward argument is false, just quit here.
return unless shift;
os2
os390
os400
- othrtut
packtut
plan9
pod
=cut
if ( $text =~ /^[\$@%]/ ) { # symbols (in $package + packages in main)
-
=pod
=over 4
$prefix = substr $text, 0, 1;
$text = substr $text, 1;
+ my @out;
+
+=pod
+
+=item *
+
+We look for the lexical scope above DB::DB and auto-complete lexical variables
+if PadWalker could be loaded.
+
+=cut
+
+ if (not $text =~ /::/ and eval "require PadWalker; 1" and not $@ ) {
+ my $level = 1;
+ while (1) {
+ my @info = caller($level);
+ $level++;
+ $level = -1, last
+ if not @info;
+ last if $info[3] eq 'DB::DB';
+ }
+ if ($level > 0) {
+ my $lexicals = PadWalker::peek_my($level);
+ push @out, grep /^\Q$prefix$text/, keys %$lexicals;
+ }
+ }
+
=pod
=item *
=cut
- my @out = map "$prefix$_", grep /^\Q$text/,
+ push @out, map "$prefix$_", grep /^\Q$text/,
( grep /^_?[a-zA-Z]/, keys %$pack ),
( $pack eq '::' ? () : ( grep /::$/, keys %:: ) );
PERLDBf_GOTO => 0x80, # Report goto: call DB::goto
PERLDBf_NAMEEVAL => 0x100, # Informative names for evals
PERLDBf_NAMEANON => 0x200, # Informative names for anon subs
+ PERLDBf_SAVESRC => 0x400, # Save source lines into @{"_<$filename"}
PERLDB_ALL => 0x33f, # No _NONAME, _GOTO
);
+ # PERLDBf_LINE also enables the actions of PERLDBf_SAVESRC, so the debugger
+ # doesn't need to set it. It's provided for the benefit of profilers and
+ # other code analysers.
%DollarCaretP_flags_r = reverse %DollarCaretP_flags;
}
https://perl5.git.perl.org / perl5.git / blobdiff