堆中分配的字符串的内存泄漏？

Question

我的代码使用堆内存分配器。以下代码中引用的leafNode对象是将从分配器获得的堆ptr强制转换为struct：leafNode的结果。 leafNode结构包含一个std :: string数组和另一个RID对象数组，没有其他字段。由于我是在堆上处理这些字符串（在keyArray中），因此我认为在分配时没有正确清理它们。运行valgrind，我看到如下输出。我应该如何避免这些内存泄漏？

11 bytes in 1 blocks are definitely lost in loss record 1 of 20
==5952==    at 0x4837DEF: operator new(unsigned long) (vg_replace_malloc.c:334)
==5952==    by 0x49D1A1F: std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::_M_assign(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) (basic_string.tcc:265)
==5952==    by 0x49D1D9D: assign (basic_string.h:1366)
==5952==    by 0x49D1D9D: std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::operator=(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) (basic_string.h:695)
==5952==    by 0x11DC11: void db::Index::insertIntoLeaf<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, db::LeafNodeString, db::NonLeafNodeString>(db::RIDKeyPair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, db::LeafNodeString*) 

leafNode结构：

struct LeafNode {
  std::string keyArray[STRINGARRAYLEAFSIZE2];
  RecordId ridArray[STRINGARRAYLEAFSIZE2];
};

这是insertIntoLeaf函数的代码：

int index = 0;
for (int i = 0; i < leafOccupancy; i++) {
  if (leafNode->ridArray[i].page_number == 0 ||
      entry.key <
          /*=*/leafNode->keyArray[i]) {  // no duplicates so no need for <=
    index = i;

    if (leafNode->ridArray[index].page_number != 0 &&
        index < leafOccupancy - 1) {
      std::rotate(&(leafNode->keyArray[index]),
                  &(leafNode->keyArray[leafOccupancy - 1]),
                  &(leafNode->keyArray[leafOccupancy]));
      std::rotate(&(leafNode->ridArray[index]),
                  &(leafNode->ridArray[leafOccupancy - 1]),
                  &(leafNode->ridArray[leafOccupancy]));
    }
    leafNode->keyArray[index] = entry.key;

    leafNode->ridArray[index] = entry.rid;
    return;
}