use Carp;
use Scalar::Util qw(isweak weaken blessed reftype);
-use DBIx::Class::_Util 'refcount';
+use DBIx::Class::_Util qw(refcount hrefaddr);
+use DBIx::Class::Optional::Dependencies;
use Data::Dumper::Concise;
use DBICTest::Util 'stacktrace';
+use constant {
+ CV_TRACING => DBIx::Class::Optional::Dependencies->req_ok_for ('test_leaks_heavy'),
+ SKIP_SCALAR_REFS => ( $] > 5.017 ) ? 1 : 0,
+};
use base 'Exporter';
-our @EXPORT_OK = qw(populate_weakregistry assert_empty_weakregistry hrefaddr);
+our @EXPORT_OK = qw(populate_weakregistry assert_empty_weakregistry visit_refs);
my $refs_traced = 0;
my $leaks_found = 0;
my %reg_of_regs;
-sub hrefaddr { sprintf '0x%x', &Scalar::Util::refaddr }
-
# so we don't trigger stringification
sub _describe_ref {
sprintf '%s%s(%s)',
for keys %$reg;
}
+ # FIXME/INVESTIGATE - something fishy is going on with refs to plain
+ # strings, perhaps something to do with the CoW work etc...
+ return $target if SKIP_SCALAR_REFS and reftype($target) eq 'SCALAR';
+
if (! defined $weak_registry->{$refaddr}{weakref}) {
$weak_registry->{$refaddr} = {
stacktrace => stacktrace(1),
}
}
+sub visit_refs {
+ my $args = { (ref $_[0]) ? %{$_[0]} : @_ };
+
+ $args->{seen_refs} ||= {};
+
+ my $visited_cnt = '0E0';
+ for my $i (0 .. $#{$args->{refs}} ) {
+ next if isweak($args->{refs}[$i]);
+
+ my $r = $args->{refs}[$i];
+
+ next unless length ref $r;
+
+ # no diving into weakregistries
+ next if $reg_of_regs{hrefaddr $r};
+
+ next if $args->{seen_refs}{my $dec_addr = Scalar::Util::refaddr($r)}++;
+
+ $visited_cnt++;
+ $args->{action}->($r) or next;
+
+ # This may end up being necessarry some day, but do not slow things
+ # down for now
+ #if ( defined( my $t = tied($r) ) ) {
+ # $visited_cnt += visit_refs({ %$args, refs => [ $t ] });
+ #}
+
+ local $@;
+ eval {
+ my $type = reftype $r;
+ if ($type eq 'HASH') {
+ $visited_cnt += visit_refs({ %$args, refs => [ map {
+ ( !isweak($r->{$_}) ) ? $r->{$_} : ()
+ } keys %$r ] });
+ }
+ elsif ($type eq 'ARRAY') {
+ $visited_cnt += visit_refs({ %$args, refs => [ map {
+ ( !isweak($r->[$_]) ) ? $r->[$_] : ()
+ } 0..$#$r ] });
+ }
+ elsif ($type eq 'REF' and !isweak($$r)) {
+ $visited_cnt += visit_refs({ %$args, refs => [ $$r ] });
+ }
+ elsif (CV_TRACING and $type eq 'CODE') {
+ $visited_cnt += visit_refs({ %$args, refs => [ map {
+ ( !isweak($_) ) ? $_ : ()
+ } scalar PadWalker::closed_over($r) ] }); # scalar due to RT#92269
+ }
+ 1;
+ } or warn "Could not descend into @{[ _describe_ref($r) ]}: $@\n";
+ }
+ $visited_cnt;
+}
+
sub assert_empty_weakregistry {
my ($weak_registry, $quiet) = @_;
+ # in case we hooked bless any extra object creation will wreak
+ # havoc during the assert phase
+ local *CORE::GLOBAL::bless;
+ *CORE::GLOBAL::bless = sub { CORE::bless( $_[0], (@_ > 1) ? $_[1] : caller() ) };
+
croak 'Expecting a registry hashref' unless ref $weak_registry eq 'HASH';
return unless keys %$weak_registry;
my $tb = eval { Test::Builder->new }
- or croak 'Calling test_weakregistry without a loaded Test::Builder makes no sense';
+ or croak "Calling assert_empty_weakregistry in $0 without a loaded Test::Builder makes no sense";
for my $addr (keys %$weak_registry) {
$weak_registry->{$addr}{display_name} = join ' | ', (
if defined $weak_registry->{$addr}{weakref} and ! isweak( $weak_registry->{$addr}{weakref} );
}
- # compile a list of refs stored as CAG class data, so we can skip them
- # intelligently below
- my ($classdata_refcounts, $symwalker, $refwalker);
-
- $refwalker = sub {
- return unless length ref $_[0];
-
- my $seen = $_[1] || {};
- return if $seen->{hrefaddr $_[0]}++;
-
- $classdata_refcounts->{hrefaddr $_[0]}++;
-
- my $type = reftype $_[0];
- if ($type eq 'HASH') {
- $refwalker->($_, $seen) for values %{$_[0]};
- }
- elsif ($type eq 'ARRAY') {
- $refwalker->($_, $seen) for @{$_[0]};
- }
- elsif ($type eq 'REF') {
- $refwalker->($$_, $seen);
- }
- };
-
- $symwalker = sub {
- no strict 'refs';
- my $pkg = shift || '::';
-
- $refwalker->(${"${pkg}$_"}) for grep { $_ =~ /__cag_(?!pkg_gen__|supers__)/ } keys %$pkg;
-
- $symwalker->("${pkg}$_") for grep { $_ =~ /(?<!^main)::$/ } keys %$pkg;
- };
-
- # run things twice, some cycles will be broken, introducing new
- # candidates for pseudo-GC
- for (1,2) {
- undef $classdata_refcounts;
+ # compile a list of refs stored as globals (possibly even catching
+ # class data in the form of method closures), so we can skip them
+ # further on
+ my ($seen_refs, $classdata_refs) = ({}, undef);
+
+ # the walk is very expensive - if we are $quiet (running in an END block)
+ # we do not really need to be too thorough
+ unless ($quiet) {
+ my ($symwalker, $symcounts);
+ $symwalker = sub {
+ no strict 'refs';
+ my $pkg = shift || '::';
+
+ # any non-weak globals are "clasdata" in all possible sense
+ #
+ # the unless regex at the end skips some dangerous namespaces outright
+ # (but does not prevent descent)
+ $symcounts->{$pkg} += visit_refs (
+ seen_refs => $seen_refs,
+ action => sub { ++$classdata_refs->{hrefaddr $_[0]} },
+ refs => [ map { my $sym = $_;
+ # *{"$pkg$sym"}{CODE} won't simply work - MRO-cached CVs are invisible there
+ ( CV_TRACING ? Class::MethodCache::get_cv("${pkg}$sym") : () ),
+
+ ( defined *{"$pkg$sym"}{SCALAR} and length ref ${"$pkg$sym"} and ! isweak( ${"$pkg$sym"} ) )
+ ? ${"$pkg$sym"} : ()
+ ,
+ ( map {
+ ( defined *{"$pkg$sym"}{$_} and ! isweak(defined *{"$pkg$sym"}{$_}) )
+ ? *{"$pkg$sym"}{$_}
+ : ()
+ } qw(HASH ARRAY IO GLOB) ),
+ } keys %$pkg ],
+ ) unless $pkg =~ /^ :: (?:
+ DB | next | B | .+? ::::ISA (?: ::CACHE ) | Class::C3
+ ) :: $/x;
+
+ $symwalker->("${pkg}$_") for grep { $_ =~ /(?<!^main)::$/ } keys %$pkg;
+ };
$symwalker->();
- for my $refaddr (keys %$weak_registry) {
- if (
- defined $weak_registry->{$refaddr}{weakref}
- and
- my $expected_refcnt = $classdata_refcounts->{$refaddr}
- ) {
- delete $weak_registry->{$refaddr}
- if refcount($weak_registry->{$refaddr}{weakref}) == $expected_refcnt;
- }
- }
+# use Devel::Dwarn;
+# Ddie [ map
+# { { $_ => $symcounts->{$_} } }
+# sort
+# {$symcounts->{$a} <=> $symcounts->{$b} }
+# keys %$symcounts
+# ];
}
+ delete $weak_registry->{$_} for keys %$classdata_refs;
+
for my $addr (sort { $weak_registry->{$a}{display_name} cmp $weak_registry->{$b}{display_name} } keys %$weak_registry) {
- ! defined $weak_registry->{$addr}{weakref} and next if $quiet;
+ next if ! defined $weak_registry->{$addr}{weakref};
+
+ $leaks_found++ unless $tb->in_todo;
+ $tb->ok (0, "Leaked $weak_registry->{$addr}{display_name}");
+
+ my $diag = do {
+ local $Data::Dumper::Maxdepth = 1;
+ sprintf "\n%s (refcnt %d) => %s\n",
+ $weak_registry->{$addr}{display_name},
+ refcount($weak_registry->{$addr}{weakref}),
+ (
+ ref($weak_registry->{$addr}{weakref}) eq 'CODE'
+ and
+ B::svref_2object($weak_registry->{$addr}{weakref})->XSUB
+ ) ? '__XSUB__' : Dumper( $weak_registry->{$addr}{weakref} )
+ ;
+ };
- $tb->ok (! defined $weak_registry->{$addr}{weakref}, "No leaks of $weak_registry->{$addr}{display_name}") or do {
- $leaks_found++;
+ # FIXME - need to add a circular reference seeker based on the visitor
+ # (will need a bunch of modifications, punting with just a stub for now)
- my $diag = do {
- local $Data::Dumper::Maxdepth = 1;
- sprintf "\n%s (refcnt %d) => %s\n",
- $weak_registry->{$addr}{display_name},
- refcount($weak_registry->{$addr}{weakref}),
- (
- ref($weak_registry->{$addr}{weakref}) eq 'CODE'
- and
- B::svref_2object($weak_registry->{$addr}{weakref})->XSUB
- ) ? '__XSUB__' : Dumper( $weak_registry->{$addr}{weakref} )
- ;
- };
+ $diag .= Devel::FindRef::track ($weak_registry->{$addr}{weakref}, 50) . "\n"
+ if ( $ENV{TEST_VERBOSE} && eval { require Devel::FindRef });
- $diag .= Devel::FindRef::track ($weak_registry->{$addr}{weakref}, 20) . "\n"
- if ( $ENV{TEST_VERBOSE} && eval { require Devel::FindRef });
+ $diag =~ s/^/ /mg;
- $diag =~ s/^/ /mg;
+ if (my $stack = $weak_registry->{$addr}{stacktrace}) {
+ $diag .= " Reference first seen$stack";
+ }
- if (my $stack = $weak_registry->{$addr}{stacktrace}) {
- $diag .= " Reference first seen$stack";
- }
+ $tb->diag($diag);
+
+# if ($leaks_found == 1) {
+# # using the fh dumper due to intermittent buffering issues
+# # in case we decide to exit soon after (possibly via _exit)
+# require Devel::MAT::Dumper;
+# local $Devel::MAT::Dumper::MAX_STRING = -1;
+# open( my $fh, '>:raw', "leaked_${addr}_pid$$.pmat" ) or die $!;
+# Devel::MAT::Dumper::dumpfh( $fh );
+# close ($fh) or die $!;
+#
+# use POSIX;
+# POSIX::_exit(1);
+# }
+ }
- $tb->diag($diag);
- };
+ if (! $quiet and !$leaks_found and ! $tb->in_todo) {
+ $tb->ok(1, sprintf "No leaks found at %s line %d", (caller())[1,2] );
}
}
projects / dbsrgits/DBIx-Class.git / blobdiff