Commit | Line | Data |
218b7c12 |
1 | package DBICTest::Util::LeakTracer; |
2 | |
3 | use warnings; |
4 | use strict; |
5 | |
c0329273 |
6 | use ANFANG; |
218b7c12 |
7 | use Carp; |
96577657 |
8 | use Scalar::Util qw(isweak weaken blessed reftype); |
8433421f |
9 | use DBIx::Class::_Util qw(refcount hrefaddr refdesc); |
c0329273 |
10 | use DBICTest::RunMode; |
96577657 |
11 | use Data::Dumper::Concise; |
c9abd679 |
12 | use DBICTest::Util qw( stacktrace visit_namespaces ); |
556c4fe6 |
13 | use constant { |
18a2903b |
14 | CV_TRACING => !!( |
15 | !DBICTest::RunMode->is_plain |
16 | && |
17 | require DBIx::Class::Optional::Dependencies |
18 | && |
19 | DBIx::Class::Optional::Dependencies->req_ok_for ('test_leaks_heavy') |
20 | ), |
556c4fe6 |
21 | }; |
218b7c12 |
22 | |
23 | use base 'Exporter'; |
bf302897 |
24 | our @EXPORT_OK = qw(populate_weakregistry assert_empty_weakregistry visit_refs); |
218b7c12 |
25 | |
26 | my $refs_traced = 0; |
96577657 |
27 | my $leaks_found = 0; |
218b7c12 |
28 | my %reg_of_regs; |
29 | |
30 | sub populate_weakregistry { |
96577657 |
31 | my ($weak_registry, $target, $note) = @_; |
218b7c12 |
32 | |
33 | croak 'Expecting a registry hashref' unless ref $weak_registry eq 'HASH'; |
34 | croak 'Target is not a reference' unless length ref $target; |
35 | |
96577657 |
36 | my $refaddr = hrefaddr $target; |
8fa57d17 |
37 | |
96577657 |
38 | # a registry could be fed to itself or another registry via recursive sweeps |
39 | return $target if $reg_of_regs{$refaddr}; |
218b7c12 |
40 | |
85ad63df |
41 | weaken( $reg_of_regs{ hrefaddr($weak_registry) } = $weak_registry ) |
42 | unless( $reg_of_regs{ hrefaddr($weak_registry) } ); |
43 | |
44 | # an explicit "garbage collection" pass every time we store a ref |
45 | # if we do not do this the registry will keep growing appearing |
46 | # as if the traced program is continuously slowly leaking memory |
47 | for my $reg (values %reg_of_regs) { |
48 | (defined $reg->{$_}{weakref}) or delete $reg->{$_} |
49 | for keys %$reg; |
50 | } |
51 | |
96577657 |
52 | if (! defined $weak_registry->{$refaddr}{weakref}) { |
53 | $weak_registry->{$refaddr} = { |
8fa57d17 |
54 | stacktrace => stacktrace(1), |
96577657 |
55 | weakref => $target, |
8fa57d17 |
56 | }; |
4841171c |
57 | |
58 | # on perl < 5.8.3 sometimes a weaken can throw (can't find RT) |
59 | # so guard against that unlikely event |
5c33c8be |
60 | local $SIG{__DIE__} if $SIG{__DIE__}; |
4841171c |
61 | local $@; |
62 | eval { weaken( $weak_registry->{$refaddr}{weakref} ); $refs_traced++ } |
63 | or delete $weak_registry->{$refaddr}; |
218b7c12 |
64 | } |
65 | |
8433421f |
66 | my $desc = refdesc $target; |
96577657 |
67 | $weak_registry->{$refaddr}{slot_names}{$desc} = 1; |
68 | if ($note) { |
69 | $note =~ s/\s*\Q$desc\E\s*//g; |
70 | $weak_registry->{$refaddr}{slot_names}{$note} = 1; |
71 | } |
72 | |
218b7c12 |
73 | $target; |
74 | } |
75 | |
96577657 |
76 | # Regenerate the slots names on a thread spawn |
218b7c12 |
77 | sub CLONE { |
78 | my @individual_regs = grep { scalar keys %{$_||{}} } values %reg_of_regs; |
79 | %reg_of_regs = (); |
80 | |
81 | for my $reg (@individual_regs) { |
96577657 |
82 | my @live_slots = grep { defined $_->{weakref} } values %$reg |
218b7c12 |
83 | or next; |
cf8fa286 |
84 | |
cf8fa286 |
85 | $reg = {}; # get a fresh hashref in the new thread ctx |
96577657 |
86 | weaken( $reg_of_regs{hrefaddr($reg)} = $reg ); |
218b7c12 |
87 | |
96577657 |
88 | for my $slot_info (@live_slots) { |
89 | my $new_addr = hrefaddr $slot_info->{weakref}; |
8fa57d17 |
90 | |
96577657 |
91 | # replace all slot names |
92 | $slot_info->{slot_names} = { map { |
93 | my $name = $_; |
94 | $name =~ s/\(0x[0-9A-F]+\)/sprintf ('(%s)', $new_addr)/ieg; |
95 | ($name => 1); |
96 | } keys %{$slot_info->{slot_names}} }; |
218b7c12 |
97 | |
96577657 |
98 | $reg->{$new_addr} = $slot_info; |
218b7c12 |
99 | } |
100 | } |
d52fc26d |
101 | |
102 | # Dummy NEXTSTATE ensuring the all temporaries on the stack are garbage |
103 | # collected before leaving this scope. Depending on the code above, this |
104 | # may very well be just a preventive measure guarding future modifications |
105 | undef; |
218b7c12 |
106 | } |
107 | |
556c4fe6 |
108 | sub visit_refs { |
109 | my $args = { (ref $_[0]) ? %{$_[0]} : @_ }; |
110 | |
111 | $args->{seen_refs} ||= {}; |
112 | |
113 | my $visited_cnt = '0E0'; |
114 | for my $i (0 .. $#{$args->{refs}} ) { |
556c4fe6 |
115 | |
a42634cd |
116 | next unless length ref $args->{refs}[$i]; # not-a-ref |
556c4fe6 |
117 | |
a42634cd |
118 | my $addr = hrefaddr $args->{refs}[$i]; |
556c4fe6 |
119 | |
6ae62c5c |
120 | # no diving into weakregistries |
a42634cd |
121 | next if $reg_of_regs{$addr}; |
556c4fe6 |
122 | |
a42634cd |
123 | next if $args->{seen_refs}{$addr}++; |
556c4fe6 |
124 | $visited_cnt++; |
a42634cd |
125 | |
126 | my $r = $args->{refs}[$i]; |
127 | |
556c4fe6 |
128 | $args->{action}->($r) or next; |
129 | |
6ae62c5c |
130 | # This may end up being necessarry some day, but do not slow things |
131 | # down for now |
132 | #if ( defined( my $t = tied($r) ) ) { |
133 | # $visited_cnt += visit_refs({ %$args, refs => [ $t ] }); |
134 | #} |
135 | |
a42634cd |
136 | my $type = reftype $r; |
137 | |
5c33c8be |
138 | local $SIG{__DIE__} if $SIG{__DIE__}; |
7664b1a0 |
139 | local $@; |
140 | eval { |
7664b1a0 |
141 | if ($type eq 'HASH') { |
142 | $visited_cnt += visit_refs({ %$args, refs => [ map { |
143 | ( !isweak($r->{$_}) ) ? $r->{$_} : () |
144 | } keys %$r ] }); |
145 | } |
146 | elsif ($type eq 'ARRAY') { |
147 | $visited_cnt += visit_refs({ %$args, refs => [ map { |
148 | ( !isweak($r->[$_]) ) ? $r->[$_] : () |
149 | } 0..$#$r ] }); |
150 | } |
151 | elsif ($type eq 'REF' and !isweak($$r)) { |
152 | $visited_cnt += visit_refs({ %$args, refs => [ $$r ] }); |
153 | } |
154 | elsif (CV_TRACING and $type eq 'CODE') { |
155 | $visited_cnt += visit_refs({ %$args, refs => [ map { |
156 | ( !isweak($_) ) ? $_ : () |
1a77219a |
157 | } values %{ scalar PadWalker::closed_over($r) } ] }); # scalar due to RT#92269 |
7664b1a0 |
158 | } |
159 | 1; |
8433421f |
160 | } or warn "Could not descend into @{[ refdesc $r ]}: $@\n"; |
556c4fe6 |
161 | } |
162 | $visited_cnt; |
163 | } |
164 | |
a42634cd |
165 | # compiles a list of addresses stored as globals (possibly even catching |
166 | # class data in the form of method closures), so we can skip them further on |
167 | sub symtable_referenced_addresses { |
168 | |
169 | my $refs_per_pkg; |
170 | |
a42634cd |
171 | my $seen_refs = {}; |
172 | visit_namespaces( |
173 | action => sub { |
556c4fe6 |
174 | |
556c4fe6 |
175 | no strict 'refs'; |
556c4fe6 |
176 | |
a42634cd |
177 | my $pkg = shift; |
a42634cd |
178 | |
556c4fe6 |
179 | # the unless regex at the end skips some dangerous namespaces outright |
180 | # (but does not prevent descent) |
a42634cd |
181 | $refs_per_pkg->{$pkg} += visit_refs ( |
556c4fe6 |
182 | seen_refs => $seen_refs, |
a42634cd |
183 | |
1a77219a |
184 | action => sub { 1 }, |
a42634cd |
185 | |
556c4fe6 |
186 | refs => [ map { my $sym = $_; |
c9abd679 |
187 | # *{"${pkg}::$sym"}{CODE} won't simply work - MRO-cached CVs are invisible there |
188 | ( CV_TRACING ? Class::MethodCache::get_cv("${pkg}::$sym") : () ), |
556c4fe6 |
189 | |
c9abd679 |
190 | ( defined *{"${pkg}::$sym"}{SCALAR} and length ref ${"${pkg}::$sym"} and ! isweak( ${"${pkg}::$sym"} ) ) |
191 | ? ${"${pkg}::$sym"} : () |
556c4fe6 |
192 | , |
a42634cd |
193 | |
556c4fe6 |
194 | ( map { |
c9abd679 |
195 | ( defined *{"${pkg}::$sym"}{$_} and ! isweak(defined *{"${pkg}::$sym"}{$_}) ) |
196 | ? *{"${pkg}::$sym"}{$_} |
556c4fe6 |
197 | : () |
198 | } qw(HASH ARRAY IO GLOB) ), |
a42634cd |
199 | |
c9abd679 |
200 | } keys %{"${pkg}::"} ], |
201 | ) unless $pkg =~ /^ (?: |
556c4fe6 |
202 | DB | next | B | .+? ::::ISA (?: ::CACHE ) | Class::C3 |
c9abd679 |
203 | ) $/x; |
a42634cd |
204 | } |
205 | ); |
556c4fe6 |
206 | |
a42634cd |
207 | # use Devel::Dwarn; |
208 | # Ddie [ map |
209 | # { { $_ => $refs_per_pkg->{$_} } } |
210 | # sort |
211 | # {$refs_per_pkg->{$a} <=> $refs_per_pkg->{$b} } |
212 | # keys %$refs_per_pkg |
213 | # ]; |
214 | |
215 | $seen_refs; |
216 | } |
217 | |
218 | sub assert_empty_weakregistry { |
219 | my ($weak_registry, $quiet) = @_; |
220 | |
221 | # in case we hooked bless any extra object creation will wreak |
222 | # havoc during the assert phase |
223 | local *CORE::GLOBAL::bless; |
821edc09 |
224 | *CORE::GLOBAL::bless = sub { CORE::bless( $_[0], (@_ > 1) ? $_[1] : CORE::caller() ) }; |
a42634cd |
225 | |
226 | croak 'Expecting a registry hashref' unless ref $weak_registry eq 'HASH'; |
227 | |
228 | defined $weak_registry->{$_}{weakref} or delete $weak_registry->{$_} |
229 | for keys %$weak_registry; |
230 | |
231 | return unless keys %$weak_registry; |
8fa57d17 |
232 | |
a42634cd |
233 | my $tb = eval { Test::Builder->new } |
234 | or croak "Calling assert_empty_weakregistry in $0 without a loaded Test::Builder makes no sense"; |
8fa57d17 |
235 | |
a42634cd |
236 | for my $addr (keys %$weak_registry) { |
237 | $weak_registry->{$addr}{display_name} = join ' | ', ( |
238 | sort |
239 | { length $a <=> length $b or $a cmp $b } |
240 | keys %{$weak_registry->{$addr}{slot_names}} |
241 | ); |
242 | |
243 | $tb->BAILOUT("!!!! WEAK REGISTRY SLOT $weak_registry->{$addr}{display_name} IS NOT A WEAKREF !!!!") |
244 | if defined $weak_registry->{$addr}{weakref} and ! isweak( $weak_registry->{$addr}{weakref} ); |
245 | } |
246 | |
8d73fcd4 |
247 | # the symtable walk is very expensive |
248 | # if we are $quiet (running in an END block) we do not really need to be |
249 | # that thorough - can get by with only %Sub::Quote::QUOTED |
250 | delete $weak_registry->{$_} for $quiet |
251 | ? do { |
252 | my $refs = {}; |
253 | visit_refs ( |
254 | # only look at the closed over stuffs |
255 | refs => [ grep { length ref $_ } map { values %{$_->[2]} } grep { ref $_ eq 'ARRAY' } values %Sub::Quote::QUOTED ], |
256 | seen_refs => $refs, |
257 | action => sub { 1 }, |
258 | ); |
259 | keys %$refs; |
260 | } |
261 | : ( |
262 | # full sumtable walk, starting from :: |
263 | keys %{ symtable_referenced_addresses() } |
264 | ) |
265 | ; |
556c4fe6 |
266 | |
96577657 |
267 | for my $addr (sort { $weak_registry->{$a}{display_name} cmp $weak_registry->{$b}{display_name} } keys %$weak_registry) { |
268 | |
1a44a267 |
269 | next if ! defined $weak_registry->{$addr}{weakref}; |
270 | |
5dc4301c |
271 | $leaks_found++ unless $tb->in_todo; |
ee20ecfc |
272 | $tb->ok (0, "Expected garbage collection of $weak_registry->{$addr}{display_name}"); |
1a44a267 |
273 | |
274 | my $diag = do { |
275 | local $Data::Dumper::Maxdepth = 1; |
276 | sprintf "\n%s (refcnt %d) => %s\n", |
277 | $weak_registry->{$addr}{display_name}, |
278 | refcount($weak_registry->{$addr}{weakref}), |
279 | ( |
280 | ref($weak_registry->{$addr}{weakref}) eq 'CODE' |
281 | and |
282 | B::svref_2object($weak_registry->{$addr}{weakref})->XSUB |
283 | ) ? '__XSUB__' : Dumper( $weak_registry->{$addr}{weakref} ) |
284 | ; |
218b7c12 |
285 | }; |
1a44a267 |
286 | |
5dc4301c |
287 | # FIXME - need to add a circular reference seeker based on the visitor |
288 | # (will need a bunch of modifications, punting with just a stub for now) |
289 | |
556c4fe6 |
290 | $diag .= Devel::FindRef::track ($weak_registry->{$addr}{weakref}, 50) . "\n" |
1a44a267 |
291 | if ( $ENV{TEST_VERBOSE} && eval { require Devel::FindRef }); |
292 | |
293 | $diag =~ s/^/ /mg; |
294 | |
295 | if (my $stack = $weak_registry->{$addr}{stacktrace}) { |
296 | $diag .= " Reference first seen$stack"; |
297 | } |
298 | |
299 | $tb->diag($diag); |
6ae62c5c |
300 | |
301 | # if ($leaks_found == 1) { |
302 | # # using the fh dumper due to intermittent buffering issues |
303 | # # in case we decide to exit soon after (possibly via _exit) |
304 | # require Devel::MAT::Dumper; |
305 | # local $Devel::MAT::Dumper::MAX_STRING = -1; |
306 | # open( my $fh, '>:raw', "leaked_${addr}_pid$$.pmat" ) or die $!; |
307 | # Devel::MAT::Dumper::dumpfh( $fh ); |
308 | # close ($fh) or die $!; |
309 | # |
47603d6c |
310 | # require POSIX; |
6ae62c5c |
311 | # POSIX::_exit(1); |
312 | # } |
1a44a267 |
313 | } |
314 | |
5dc4301c |
315 | if (! $quiet and !$leaks_found and ! $tb->in_todo) { |
821edc09 |
316 | $tb->ok(1, sprintf "No leaks found at %s line %d", (CORE::caller())[1,2] ); |
218b7c12 |
317 | } |
318 | } |
319 | |
320 | END { |
b77a61d8 |
321 | if ( |
322 | $INC{'Test/Builder.pm'} |
323 | and |
324 | my $tb = do { |
325 | local $@; |
326 | my $t = eval { Test::Builder->new } |
327 | or warn "Test::Builder->new failed:\n$@\n"; |
328 | $t; |
329 | } |
330 | ) { |
218b7c12 |
331 | # we check for test passage - a leak may be a part of a TODO |
332 | if ($leaks_found and !$tb->is_passing) { |
333 | |
334 | $tb->diag(sprintf |
335 | "\n\n%s\n%s\n\nInstall Devel::FindRef and re-run the test with set " |
336 | . '$ENV{TEST_VERBOSE} (prove -v) to see a more detailed leak-report' |
337 | . "\n\n%s\n%s\n\n", ('#' x 16) x 4 |
338 | ) if ( !$ENV{TEST_VERBOSE} or !$INC{'Devel/FindRef.pm'} ); |
339 | |
340 | } |
341 | else { |
342 | $tb->note("Auto checked $refs_traced references for leaks - none detected"); |
343 | } |
cbd7f87a |
344 | |
cbd7f87a |
345 | # also while we are here and not in plain runmode: make sure we never |
346 | # loaded any of the strictures XS bullshit (it's a leak in a sense) |
0020e364 |
347 | unless ( |
348 | $ENV{MOO_FATAL_WARNINGS} |
349 | or |
350 | # FIXME - SQLT loads strictures explicitly, /facedesk |
351 | # remove this INC check when 0fb58589 and 45287c815 are rectified |
352 | $INC{'SQL/Translator.pm'} |
353 | or |
354 | DBICTest::RunMode->is_plain |
355 | ) { |
cbd7f87a |
356 | for (qw(indirect multidimensional bareword::filehandles)) { |
357 | exists $INC{ Module::Runtime::module_notional_filename($_) } |
358 | and |
ee20ecfc |
359 | $tb->ok(0, "$_ load should not have been attempted!!!" ) |
cbd7f87a |
360 | } |
361 | } |
218b7c12 |
362 | } |
363 | } |
364 | |
365 | 1; |