Fix possible int overflow in compute_mixed_join_output_size (#17633)

Fixes possible integer overflow condition when the number of rows is near max int32 in `compute_mixed_join_output_size` kernel function.
Reference #10368

Authors:
  - David Wendt (https://github.com/davidwendt)

Approvers:
  - Bradley Dice (https://github.com/bdice)
  - Vukasin Milovanovic (https://github.com/vuule)

URL: #17633

cpp/src/join/mixed_join_size_kernel.cuh

@@ -62,8 +62,8 @@ CUDF_KERNEL void __launch_bounds__(block_size)
     intermediate_storage + (threadIdx.x * device_expression_data.num_intermediates);
 
   std::size_t thread_counter{0};
-  cudf::size_type const start_idx      = threadIdx.x + blockIdx.x * block_size;
-  cudf::size_type const stride         = block_size * gridDim.x;
+  auto const start_idx                 = cudf::detail::grid_1d::global_thread_id();
+  auto const stride                    = cudf::detail::grid_1d::grid_stride();
   cudf::size_type const left_num_rows  = left_table.num_rows();
   cudf::size_type const right_num_rows = right_table.num_rows();
   auto const outer_num_rows            = (swap_tables ? right_num_rows : left_num_rows);
@@ -80,7 +80,7 @@ CUDF_KERNEL void __launch_bounds__(block_size)
   auto count_equality = pair_expression_equality<has_nulls>{
     evaluator, thread_intermediate_storage, swap_tables, equality_probe};
 
-  for (cudf::size_type outer_row_index = start_idx; outer_row_index < outer_num_rows;
+  for (auto outer_row_index = start_idx; outer_row_index < outer_num_rows;
        outer_row_index += stride) {
     auto query_pair = pair_func(outer_row_index);
     if (join_type == join_kind::LEFT_JOIN || join_type == join_kind::FULL_JOIN) {

cpp/src/json/json_path.cu

@@ -928,7 +928,7 @@ __launch_bounds__(block_size) CUDF_KERNEL
                               get_json_object_options options)
 {
   auto tid          = cudf::detail::grid_1d::global_thread_id();
-  auto const stride = cudf::thread_index_type{blockDim.x} * cudf::thread_index_type{gridDim.x};
+  auto const stride = cudf::detail::grid_1d::grid_stride();
 
   size_type warp_valid_count{0};