From 7224fda9958cb465bd6699d1d1472726907390ee Mon Sep 17 00:00:00 2001 From: Jonathan Druart Date: Fri, 8 Apr 2016 13:08:55 +0100 Subject: [PATCH] Bug 16229: Deep copy on first L2 fetch When a value exists in L2 cache but not in L1 cache, it should be deep copied if needed (i.e. not a scalar). Otherwise the calling code is able to modify the value in cache. Note that is theoretical, it's possible that no code does that. --- Koha/Cache.pm | 2 ++ t/Cache.t | 8 +++++++- 2 files changed, 9 insertions(+), 1 deletion(-) diff --git a/Koha/Cache.pm b/Koha/Cache.pm index 8370d3e..0c9558d 100644 --- a/Koha/Cache.pm +++ b/Koha/Cache.pm @@ -335,6 +335,8 @@ sub get_from_cache { # Otherwise the L1 cache won't ever be populated $L1_cache{$key} = $value; + $value = clone $value if ref $L1_cache{$key} and not $unsafe; + return $value; } diff --git a/t/Cache.t b/t/Cache.t index 8adaf1c..fa20a45 100644 --- a/t/Cache.t +++ b/t/Cache.t @@ -17,7 +17,7 @@ use Modern::Perl; -use Test::More tests => 37; +use Test::More tests => 38; my $destructorcount = 0; @@ -181,6 +181,12 @@ SKIP: { $item_from_cache = $cache->get_from_cache('test_deep_copy_array'); @$item_from_cache = qw( another array ref ); is_deeply( $cache->get_from_cache('test_deep_copy_array'), [ qw ( an array ref ) ], 'An array will be deep copied'); + + $cache->flush_L1_cache(); + $item_from_cache = $cache->get_from_cache('test_deep_copy_array'); + @$item_from_cache = qw( another array ref ); + is_deeply( $cache->get_from_cache('test_deep_copy_array'), [ qw ( an array ref ) ], 'An array will be deep copied even it is the first fetch from L2'); + $item_from_cache = $cache->get_from_cache('test_deep_copy_array', { unsafe => 1 }); @$item_from_cache = qw( another array ref ); is_deeply( $cache->get_from_cache('test_deep_copy_array'), [ qw ( another array ref ) ], 'An array will not be deep copied if the unsafe flag is set'); -- 2.7.0