[CP] Make ObTabletTableIterator and ObTableStoreIterator deep copy safe

src/storage/ddl/ob_complement_data_task.cpp

@@ -1773,9 +1773,10 @@ int ObLocalScan::construct_multiple_scan_merge(
 {
   int ret = OB_SUCCESS;
   void *buf = nullptr;
-  get_table_param_.tablet_iter_ = table_iter;
   LOG_INFO("start to do output_store.scan");
-  if (OB_ISNULL(buf = allocator_.alloc(sizeof(ObMultipleScanMerge)))) {
+  if (OB_FAIL(get_table_param_.tablet_iter_.assign(table_iter))) {
+    LOG_WARN("fail to assign tablet iterator", K(ret));
+  } else if (OB_ISNULL(buf = allocator_.alloc(sizeof(ObMultipleScanMerge)))) {
     ret = OB_ALLOCATE_MEMORY_FAILED;
     LOG_WARN("fail to alloc memory for ObMultipleScanMerge", K(ret));
   } else if (FALSE_IT(scan_merge_ = new(buf)ObMultipleScanMerge())) {

src/storage/ls/ob_ls_tablet_service.cpp

@@ -5506,9 +5506,10 @@ void ObLSTabletService::dump_diag_info_for_old_row_loss(
       ObSingleMerge *get_merge = nullptr;
       ObGetTableParam get_table_param;
       ObDatumRow *row = nullptr;
-      get_table_param.tablet_iter_ = data_table.tablet_iter_;
       void *buf = nullptr;
-      if (OB_ISNULL(buf = allocator.alloc(sizeof(ObSingleMerge)))) {
+      if (OB_FAIL(get_table_param.tablet_iter_.assign(data_table.tablet_iter_))) {
+        LOG_WARN("Failed to assign tablet iterator", K(ret));
+      } else if (OB_ISNULL(buf = allocator.alloc(sizeof(ObSingleMerge)))) {
         ret = OB_ALLOCATE_MEMORY_FAILED;
         LOG_WARN("Failed to alloc memory for single merge", K(ret));
       } else if (FALSE_IT(get_merge = new(buf)ObSingleMerge())) {

src/storage/meta_mem/ob_tablet_handle.cpp

@@ -195,28 +195,44 @@ int64_t ObTabletHandle::to_string(char *buf, const int64_t buf_len) const
   return pos;
 }
 
-void ObTabletTableIterator::operator=(const ObTabletTableIterator& other)
+int ObTabletTableIterator::assign(const ObTabletTableIterator& other)
 {
+  int ret = OB_SUCCESS;
   if (this != &other) {
     if (other.tablet_handle_.is_valid()) {
       tablet_handle_ = other.tablet_handle_;
     } else if (tablet_handle_.is_valid()) {
       tablet_handle_.reset();
     }
-    if (other.table_store_iter_.is_valid()) {
+    if (OB_FAIL(ret)) {
-      table_store_iter_ = other.table_store_iter_;
+    } else if (other.table_store_iter_.is_valid()) {
+      if (OB_FAIL(table_store_iter_.assign(other.table_store_iter_))) {
+        LOG_WARN("assign table store iter fail", K(ret));
+      }
     } else if (table_store_iter_.is_valid()) {
       table_store_iter_.reset();
     }
+
+    if (OB_FAIL(ret)) {
+    } else {
       if (OB_UNLIKELY(nullptr != other.transfer_src_handle_)) {
         if (nullptr == transfer_src_handle_) {
           void *tablet_hdl_buf = ob_malloc(sizeof(ObTabletHandle), ObMemAttr(MTL_ID(), "TransferMetaH"));
+          if (OB_ISNULL(tablet_hdl_buf)) {
+            ret = OB_ALLOCATE_MEMORY_FAILED;
+            LOG_WARN("fail to allocator memory for handle", K(ret));
+          } else {
             transfer_src_handle_ = new (tablet_hdl_buf) ObTabletHandle();
           }
+        }
+        if (OB_SUCC(ret)) {
           *transfer_src_handle_ = *(other.transfer_src_handle_);
         }
       }
     }
+  }
+  return ret;
+}
 
 ObTableStoreIterator *ObTabletTableIterator::table_iter()
 {
@@ -242,7 +258,7 @@ int ObTabletTableIterator::set_transfer_src_tablet_handle(const ObTabletHandle &
     void *tablet_hdl_buf = ob_malloc(sizeof(ObTabletHandle), ObMemAttr(MTL_ID(), "TransferTblH"));
     if (OB_ISNULL(tablet_hdl_buf)) {
       ret = OB_ALLOCATE_MEMORY_FAILED;
-      LOG_WARN("fail to allocator memory for handles");
+      LOG_WARN("fail to allocator memory for handles", K(ret));
     } else {
       transfer_src_handle_ = new (tablet_hdl_buf) ObTabletHandle();
     }

src/storage/meta_mem/ob_tablet_handle.h

@@ -75,9 +75,7 @@ class ObTabletTableIterator final
 public:
   ObTabletTableIterator() : tablet_handle_(), table_store_iter_(), transfer_src_handle_(nullptr) {}
   explicit ObTabletTableIterator(const bool is_reverse) : tablet_handle_(), table_store_iter_(is_reverse), transfer_src_handle_(nullptr) {}
-
+  int assign(const ObTabletTableIterator& other);
-  ObTabletTableIterator(const ObTabletTableIterator& other) { *this = other; } ;
-  void operator=(const ObTabletTableIterator& other);
   ~ObTabletTableIterator() { reset(); }
   void reset()
   {
@@ -106,6 +104,7 @@ private:
   ObTabletHandle tablet_handle_;
   ObTableStoreIterator table_store_iter_;
   ObTabletHandle *transfer_src_handle_;
+  DISALLOW_COPY_AND_ASSIGN(ObTabletTableIterator);
 };
 
 struct ObGetTableParam final

src/storage/ob_partition_range_spliter.cpp

@@ -1875,7 +1875,9 @@ int ObPartitionIncrementalRangeSpliter::ObIncrementalIterator::prepare_get_table
     }
   }
   if (OB_SUCC(ret)) {
-    *get_tbl_param_.tablet_iter_.table_iter() = tbls_iter_;
+    if (OB_FAIL(get_tbl_param_.tablet_iter_.table_iter()->assign(tbls_iter_))) {
+      STORAGE_LOG(WARN, "Failed to assign tablet iterator", KR(ret));
+    }
   }
   return ret;
 }

src/storage/ob_value_row_iterator.cpp

@@ -192,9 +192,12 @@ int ObSingleRowGetter::init_dml_access_param(ObRelativeTable &relative_table,
 {
   int ret = OB_SUCCESS;
   relative_table_ = &relative_table;
-  get_table_param_.tablet_iter_ = relative_table.tablet_iter_;
+
   const share::schema::ObTableSchemaParam *schema_param = relative_table.get_schema_param();
   output_projector_.set_capacity(out_col_ids.count());
+  if (OB_FAIL(get_table_param_.tablet_iter_.assign(relative_table.tablet_iter_))) {
+    LOG_WARN("assign tablet iterator fail", K(ret));
+  }
   for (int32_t i = 0; OB_SUCC(ret) && i < out_col_ids.count(); ++i) {
     int idx = OB_INVALID_INDEX;
     if (OB_FAIL(schema_param->get_col_map().get(out_col_ids.at(i), idx))) {

src/storage/tablet/ob_tablet_table_store_iterator.cpp

@@ -38,8 +38,9 @@ ObTableStoreIterator::ObTableStoreIterator(const bool reverse, const bool need_l
   sstable_handle_array_.set_attr(ObMemAttr(MTL_ID(), "TblHdlArray"));
 }
 
-void ObTableStoreIterator::operator=(const ObTableStoreIterator& other)
+int ObTableStoreIterator::assign(const ObTableStoreIterator& other)
 {
+  int ret = OB_SUCCESS;
   if (this != &other) {
     need_load_sstable_ = other.need_load_sstable_;
     if (other.table_store_handle_.is_valid()) {
@@ -47,24 +48,43 @@ void ObTableStoreIterator::operator=(const ObTableStoreIterator& other)
     } else if (table_store_handle_.is_valid()) {
       table_store_handle_.reset();
     }
-    if (other.sstable_handle_array_.count() > 0) {
+
-      sstable_handle_array_ = other.sstable_handle_array_;
+    if (OB_FAIL(ret)) {
+    } else if (other.sstable_handle_array_.count() > 0) {
+      if (OB_FAIL(sstable_handle_array_.assign(other.sstable_handle_array_))) {
+        LOG_WARN("assign sstable handle array fail", K(ret));
+      }
     } else if (sstable_handle_array_.count() > 0) {
       sstable_handle_array_.reset();
     }
-    table_ptr_array_ = other.table_ptr_array_;
+
+    if (OB_FAIL(ret)) {
+    } else if (OB_FAIL(table_ptr_array_.assign(other.table_ptr_array_))) {
+      LOG_WARN("assign table ptr array fail", K(ret));
+    } else {
       pos_ = other.pos_;
       step_ = other.step_;
       memstore_retired_ = other.memstore_retired_;
-    if (OB_UNLIKELY(nullptr != other.transfer_src_table_store_handle_)) {
+    }
+
+    if (OB_FAIL(ret)) {
+    } else if (OB_UNLIKELY(nullptr != other.transfer_src_table_store_handle_)) {
       if (nullptr == transfer_src_table_store_handle_) {
         void *meta_hdl_buf = ob_malloc(sizeof(ObStorageMetaHandle), ObMemAttr(MTL_ID(), "TransferMetaH"));
+        if (OB_ISNULL(meta_hdl_buf)) {
+          ret = OB_ALLOCATE_MEMORY_FAILED;
+          LOG_WARN("fail to allocator memory for handle", K(ret));
+        } else {
           transfer_src_table_store_handle_ = new (meta_hdl_buf) ObStorageMetaHandle();
         }
+      }
+      if (OB_SUCC(ret)) {
         *transfer_src_table_store_handle_ = *(other.transfer_src_table_store_handle_);
       }
     }
   }
+  return ret;
+}
 
 ObTableStoreIterator::~ObTableStoreIterator()
 {

src/storage/tablet/ob_tablet_table_store_iterator.h

@@ -26,7 +26,7 @@ class ObTableHandleV2;
 class ObSSTableArray;
 class ObMemtableArray;
 
-class ObTableStoreIterator
+class ObTableStoreIterator final
 {
 // TODO: currently, we will load all related tables into memory on initializetion of iterator,
 // maybe we should init with sstable address and prefetch sstable on iteratring for more smooth memory usage
@@ -48,8 +48,7 @@ public:
   typedef common::ObSEArray<ObStorageMetaHandle, DEFAULT_TABLE_HANDLE_CNT> SSTableHandleArray;
   typedef common::ObSEArray<TablePtr, DEFAULT_TABLE_CNT> TableArray;
   ObTableStoreIterator(const bool is_reverse = false, const bool need_load_sstable = true);
-  ObTableStoreIterator(const ObTableStoreIterator& other) { *this = other; } ;
+  int assign(const ObTableStoreIterator& other);
-  void operator=(const ObTableStoreIterator& other);
   virtual ~ObTableStoreIterator();
 
   OB_INLINE bool is_valid() const { return table_ptr_array_.count() > 0; }
@@ -96,6 +95,7 @@ private:
   int64_t step_;
   bool * memstore_retired_;
   ObStorageMetaHandle *transfer_src_table_store_handle_;
+  DISALLOW_COPY_AND_ASSIGN(ObTableStoreIterator);
 };