ledger-tool create-snapshot uses write cache (#29119)

* ledger-tool create-snapshot uses write cache

* ledger tool create snapshot works with write cache

ledger-tool/src/main.rs

@@ -3018,6 +3018,7 @@ fn main() {
                     &genesis_config,
                     &blockstore,
                     ProcessOptions {
+                        accounts_db_caching_enabled: true,
                         new_hard_forks,
                         halt_at_slot: Some(snapshot_slot),
                         poh_verify: false,

runtime/src/accounts.rs

@@ -884,6 +884,7 @@ impl Accounts {
         debug_verify: bool,
         epoch_schedule: &EpochSchedule,
         rent_collector: &RentCollector,
+        data_source: CalcAccountsHashDataSource,
     ) -> u64 {
         let is_startup = true;
         self.accounts_db
@@ -891,7 +892,7 @@ impl Accounts {
             .wait_for_complete();
         self.accounts_db
             .update_accounts_hash(
-                CalcAccountsHashDataSource::Storages,
+                data_source,
                 debug_verify,
                 slot,
                 ancestors,

runtime/src/bank.rs

@@ -7009,6 +7009,8 @@ impl Bank {
             debug_verify,
             self.epoch_schedule(),
             &self.rent_collector,
+            // we have to use the index since the slot could be in the write cache still
+            CalcAccountsHashDataSource::IndexForTests,
         )
     }
 
@@ -7031,7 +7033,10 @@ impl Bank {
     /// This should only be used for developing purposes.
     pub fn set_capitalization(&self) -> u64 {
         let old = self.capitalization();
-        let debug_verify = true;
+        // We cannot debug verify the hash calculation here becuase calculate_capitalization will use the index calculation due to callers using the write cache.
+        // debug_verify only exists as an extra debugging step under the assumption that this code path is only used for tests. But, this is used by ledger-tool create-snapshot
+        // for example.
+        let debug_verify = false;
         self.capitalization
             .store(self.calculate_capitalization(debug_verify), Relaxed);
         old