[2420] re-create updater in clearZoneData() to avoid referencing invalid data

src/lib/datasrc/tests/memory/zone_data_updater_unittest.cc

@@ -28,6 +28,8 @@
 
 #include <gtest/gtest.h>
 
+#include <boost/scoped_ptr.hpp>
+
 #include <cassert>
 
 using isc::testutils::textToRRset;
@@ -41,7 +43,7 @@ protected:
     ZoneDataUpdaterTest() :
         zname_("example.org"), zclass_(RRClass::IN()),
         zone_data_(ZoneData::create(mem_sgmt_, zname_)),
-        updater_(mem_sgmt_, zclass_, zname_, *zone_data_)
+        updater_(new ZoneDataUpdater(mem_sgmt_, zclass_, zname_, *zone_data_))
     {}
     ~ZoneDataUpdaterTest() {
         // Make sure zone data is destroyed even if a test results in exception
@@ -53,6 +55,8 @@ protected:
         assert(zone_data_ != NULL);
         ZoneData::destroy(mem_sgmt_, zone_data_, zclass_);
         zone_data_ = ZoneData::create(mem_sgmt_, zname_);
+        updater_.reset(new ZoneDataUpdater(mem_sgmt_, zclass_, zname_,
+                                           *zone_data_));
     }
 
     void TearDown() {
@@ -66,12 +70,12 @@ protected:
     const RRClass zclass_;
     test::MemorySegmentTest mem_sgmt_;
     ZoneData* zone_data_;
-    ZoneDataUpdater updater_;
+    boost::scoped_ptr<ZoneDataUpdater> updater_;
 };
 
 TEST_F(ZoneDataUpdaterTest, bothNull) {
     // At least either covered RRset or RRSIG must be non NULL.
-    EXPECT_THROW(updater_.add(ConstRRsetPtr(), ConstRRsetPtr()),
+    EXPECT_THROW(updater_->add(ConstRRsetPtr(), ConstRRsetPtr()),
                  ZoneDataUpdater::NullRRset);
 }
 
@@ -88,9 +92,9 @@ getNode(isc::util::MemorySegment& mem_sgmt, const Name& name,
 TEST_F(ZoneDataUpdaterTest, rrsigOnly) {
     // RRSIG that doesn't have covered RRset can be added.  The resulting
     // rdataset won't have "normal" RDATA but sig RDATA.
-    updater_.add(ConstRRsetPtr(), textToRRset(
-                     "www.example.org. 3600 IN RRSIG A 5 3 3600 20150420235959"
-                     " 20051021000000 1 example.org. FAKE"));
+    updater_->add(ConstRRsetPtr(), textToRRset(
+                      "www.example.org. 3600 IN RRSIG A 5 3 3600 "
+                      "20150420235959 20051021000000 1 example.org. FAKE"));
     ZoneNode* node = getNode(mem_sgmt_, Name("www.example.org"), zone_data_);
     const RdataSet* rdset = node->getData();
     ASSERT_NE(static_cast<RdataSet*>(NULL), rdset);
@@ -102,44 +106,44 @@ TEST_F(ZoneDataUpdaterTest, rrsigOnly) {
     // The RRSIG covering A prohibits an actual A RRset from being added.
     // This should be loosened in future version, but we check the current
     // behavior.
-    EXPECT_THROW(updater_.add(
+    EXPECT_THROW(updater_->add(
                      textToRRset("www.example.org. 3600 IN A 192.0.2.1"),
                      ConstRRsetPtr()), ZoneDataUpdater::AddError);
 
     // The special "wildcarding" node mark should be added for the RRSIG-only
     // case, too.
-    updater_.add(ConstRRsetPtr(), textToRRset(
-                     "*.wild.example.org. 3600 IN RRSIG A 5 3 3600 "
-                     "20150420235959 20051021000000 1 example.org. FAKE"));
+    updater_->add(ConstRRsetPtr(), textToRRset(
+                      "*.wild.example.org. 3600 IN RRSIG A 5 3 3600 "
+                      "20150420235959 20051021000000 1 example.org. FAKE"));
     node = getNode(mem_sgmt_, Name("wild.example.org"), zone_data_);
     EXPECT_TRUE(node->getFlag(ZoneData::WILDCARD_NODE));
 
     // Simply adding RRSIG covering (delegating NS) shouldn't enable callback
     // in search.
-    updater_.add(ConstRRsetPtr(), textToRRset(
-                     "child.example.org. 3600 IN RRSIG NS 5 3 3600 "
-                     "20150420235959 20051021000000 1 example.org. FAKE"));
+    updater_->add(ConstRRsetPtr(), textToRRset(
+                      "child.example.org. 3600 IN RRSIG NS 5 3 3600 "
+                      "20150420235959 20051021000000 1 example.org. FAKE"));
     node = getNode(mem_sgmt_, Name("child.example.org"), zone_data_);
     EXPECT_FALSE(node->getFlag(ZoneNode::FLAG_CALLBACK));
 
     // Same for DNAME
-    updater_.add(ConstRRsetPtr(), textToRRset(
-                     "dname.example.org. 3600 IN RRSIG DNAME 5 3 3600 "
-                     "20150420235959 20051021000000 1 example.org. FAKE"));
+    updater_->add(ConstRRsetPtr(), textToRRset(
+                      "dname.example.org. 3600 IN RRSIG DNAME 5 3 3600 "
+                      "20150420235959 20051021000000 1 example.org. FAKE"));
     node = getNode(mem_sgmt_, Name("dname.example.org"), zone_data_);
     EXPECT_FALSE(node->getFlag(ZoneNode::FLAG_CALLBACK));
 
     // Likewise, RRSIG for NSEC3PARAM alone shouldn't make the zone
     // "NSEC3-signed".
-    updater_.add(ConstRRsetPtr(), textToRRset(
-                     "example.org. 3600 IN RRSIG NSEC3PARAM 5 3 3600 "
-                     "20150420235959 20051021000000 1 example.org. FAKE"));
+    updater_->add(ConstRRsetPtr(), textToRRset(
+                      "example.org. 3600 IN RRSIG NSEC3PARAM 5 3 3600 "
+                      "20150420235959 20051021000000 1 example.org. FAKE"));
     EXPECT_FALSE(zone_data_->isNSEC3Signed());
 
     // And same for (RRSIG for) NSEC and "is signed".
-    updater_.add(ConstRRsetPtr(), textToRRset(
-                     "example.org. 3600 IN RRSIG NSEC 5 3 3600 "
-                     "20150420235959 20051021000000 1 example.org. FAKE"));
+    updater_->add(ConstRRsetPtr(), textToRRset(
+                      "example.org. 3600 IN RRSIG NSEC 5 3 3600 "
+                      "20150420235959 20051021000000 1 example.org. FAKE"));
     EXPECT_FALSE(zone_data_->isSigned());
 }
 
@@ -168,35 +172,35 @@ TEST_F(ZoneDataUpdaterTest, rrsigForNSEC3Only) {
     // but that doesn't matter for this test.
 
     // Add NSEC3PARAM, then RRSIG-only, which is okay.
-    updater_.add(textToRRset(
-                     "example.org. 3600 IN NSEC3PARAM 1 0 12 AABBCCDD"),
-                 textToRRset(
-                     "example.org. 3600 IN RRSIG NSEC3PARAM 5 3 3600 "
-                     "20150420235959 20051021000000 1 example.org. FAKE"));
+    updater_->add(textToRRset(
+                      "example.org. 3600 IN NSEC3PARAM 1 0 12 AABBCCDD"),
+                  textToRRset(
+                      "example.org. 3600 IN RRSIG NSEC3PARAM 5 3 3600 "
+                      "20150420235959 20051021000000 1 example.org. FAKE"));
     EXPECT_TRUE(zone_data_->isNSEC3Signed());
-    updater_.add(ConstRRsetPtr(),
-                 textToRRset(
-                     "09GM.example.org. 3600 IN RRSIG NSEC3 5 3 3600 "
-                     "20150420235959 20051021000000 1 example.org. FAKE"));
+    updater_->add(ConstRRsetPtr(),
+                  textToRRset(
+                      "09GM.example.org. 3600 IN RRSIG NSEC3 5 3 3600 "
+                      "20150420235959 20051021000000 1 example.org. FAKE"));
     checkNSEC3Rdata(mem_sgmt_, Name("09GM.example.org"), zone_data_);
 
     // Clear the current content of zone, then add NSEC3
     clearZoneData();
-    updater_.add(textToRRset(
-                     "AABB.example.org. 3600 IN NSEC3 1 0 10 AA 00000000 A"),
-                 textToRRset(
-                     "AABB.example.org. 3600 IN RRSIG NSEC3 5 3 3600 "
-                     "20150420235959 20051021000000 1 example.org. FAKE"));
-    updater_.add(ConstRRsetPtr(),
-                 textToRRset(
-                     "09GM.example.org. 3600 IN RRSIG NSEC3 5 3 3600 "
-                     "20150420235959 20051021000000 1 example.org. FAKE"));
+    updater_->add(textToRRset(
+                      "AABB.example.org. 3600 IN NSEC3 1 0 10 AA 00000000 A"),
+                  textToRRset(
+                      "AABB.example.org. 3600 IN RRSIG NSEC3 5 3 3600 "
+                      "20150420235959 20051021000000 1 example.org. FAKE"));
+    updater_->add(ConstRRsetPtr(),
+                  textToRRset(
+                      "09GM.example.org. 3600 IN RRSIG NSEC3 5 3 3600 "
+                      "20150420235959 20051021000000 1 example.org. FAKE"));
     checkNSEC3Rdata(mem_sgmt_, Name("09GM.example.org"), zone_data_);
 
     // If we add only RRSIG without any NSEC3 related data beforehand,
     // it will be rejected; it's a limitation of the current implementation.
     clearZoneData();
-    EXPECT_THROW(updater_.add(
+    EXPECT_THROW(updater_->add(
                      ConstRRsetPtr(),
                      textToRRset(
                          "09GM.example.org. 3600 IN RRSIG NSEC3 5 3 3600 "