commit 06ecb9432f4596f10e73f82bb1ff6677060756f9 Author: Nick Mathewson nickm@torproject.org Date: Tue Apr 11 15:50:06 2017 -0400

conscache.c: do not match entries that are slated for removal. --- src/or/conscache.c | 15 ++++++++++----- src/test/test_conscache.c | 7 +++---- 2 files changed, 13 insertions(+), 9 deletions(-)

diff --git a/src/or/conscache.c b/src/or/conscache.c index 2a6e144..a186163 100644 --- a/src/or/conscache.c +++ b/src/or/conscache.c @@ -174,6 +174,8 @@ consensus_cache_find_first(consensus_cache_t *cache, * Given a <b>cache</b>, add every entry to <b>out<b> for which * <b>key</b>=<b>value</b>. If <b>key</b> is NULL, add every entry. * + * Do not add any entry that has been marked for removal. + * * Does not adjust reference counts. */ void @@ -182,12 +184,15 @@ consensus_cache_find_all(smartlist_t *out, const char *key, const char *value) { - if (! key) { - smartlist_add_all(out, cache->entries); - return; - } - SMARTLIST_FOREACH_BEGIN(cache->entries, consensus_cache_entry_t *, ent) { + if (ent->can_remove == 1) { + /* We want to delete this; pretend it isn't there. */ + continue; + } + if (! key) { + smartlist_add(out, ent); + continue; + } const char *found_val = consensus_cache_entry_get_value(ent, key); if (found_val && !strcmp(value, found_val)) { smartlist_add(out, ent); diff --git a/src/test/test_conscache.c b/src/test/test_conscache.c index 12184f0..c316411 100644 --- a/src/test/test_conscache.c +++ b/src/test/test_conscache.c @@ -200,8 +200,7 @@ test_conscache_cleanup(void *arg) tt_assert(e_tmp); tt_assert(consensus_cache_entry_is_mapped(e_tmp)); e_tmp = consensus_cache_find_first(cache, "index", "7"); - tt_assert(e_tmp); - tt_assert(consensus_cache_entry_is_mapped(e_tmp)); + tt_assert(e_tmp == NULL); // not found because pending deletion.

/* Delete the pending-deletion items. */ consensus_cache_delete_pending(cache); @@ -210,12 +209,12 @@ test_conscache_cleanup(void *arg) consensus_cache_find_all(entries, cache, NULL, NULL); int n = smartlist_len(entries); smartlist_free(entries); - tt_int_op(n, OP_EQ, 20 - 1); /* 1 entry was deleted */ + tt_int_op(n, OP_EQ, 20 - 2); /* 1 entry was deleted; 1 is not-found. */ } e_tmp = consensus_cache_find_first(cache, "index", "7"); // refcnt == 1... tt_assert(e_tmp == NULL); // so deleted. e_tmp = consensus_cache_find_first(cache, "index", "14"); // refcnt == 2 - tt_assert(e_tmp); // so, not deleted. + tt_assert(e_tmp == NULL); // not deleted; but not found.

/* Now do lazy unmapping. */ // should do nothing.