cache executors on failed transactions

program-runtime/src/invoke_context.rs

@@ -65,31 +65,56 @@ pub trait Executor: Debug + Send + Sync {
 
 pub type Executors = HashMap<Pubkey, TransactionExecutor>;
 
-/// Tracks whether a given executor is "dirty" and needs to
-/// updated in the executors cache
+/// Tracks whether a given executor is "dirty" and needs to updated in the
+/// executors cache
 pub struct TransactionExecutor {
-    pub executor: Arc<dyn Executor>,
-    pub is_dirty: bool,
+    executor: Arc<dyn Executor>,
+    is_miss: bool,
+    is_updated: bool,
 }
 
 impl TransactionExecutor {
-    /// Wraps an executor and tracks that it doesn't need
-    /// to be updated in the executors cache.
-    pub fn cached(executor: Arc<dyn Executor>) -> Self {
+    /// Wraps an executor and tracks that it doesn't need to be updated in the
+    /// executors cache.
+    pub fn new_cached(executor: Arc<dyn Executor>) -> Self {
         Self {
             executor,
-            is_dirty: false,
+            is_miss: false,
+            is_updated: false,
         }
     }
 
-    /// Wraps an executor and tracks that it needs to be
-    /// updated in the executors cache.
-    pub fn dirty(executor: Arc<dyn Executor>) -> Self {
+    /// Wraps an executor and tracks that it needs to be updated in the
+    /// executors cache.
+    pub fn new_miss(executor: Arc<dyn Executor>) -> Self {
         Self {
             executor,
-            is_dirty: true,
+            is_miss: true,
+            is_updated: false,
         }
     }
+
+    /// Wraps an executor and tracks that it needs to be updated in the
+    /// executors cache only if the transaction succeeded.
+    pub fn new_updated(executor: Arc<dyn Executor>) -> Self {
+        Self {
+            executor,
+            is_miss: false,
+            is_updated: true,
+        }
+    }
+
+    pub fn is_dirty(&self, include_updates: bool) -> bool {
+        self.is_miss || (include_updates && self.is_updated)
+    }
+
+    pub fn get(&self) -> Arc<dyn Executor> {
+        self.executor.clone()
+    }
+
+    pub fn miss(&mut self) {
+        self.is_miss = true;
+    }
 }
 
 /// Compute meter
@@ -894,12 +919,18 @@ impl<'a> InvokeContext<'a> {
         &self.accounts_data_meter
     }
 
-    /// Loaders may need to do work in order to execute a program. Cache
-    /// the work that can be re-used across executions
+    /// Cache an executor that wasn't found in the cache
     pub fn add_executor(&self, pubkey: &Pubkey, executor: Arc<dyn Executor>) {
         self.executors
             .borrow_mut()
-            .insert(*pubkey, TransactionExecutor::dirty(executor));
+            .insert(*pubkey, TransactionExecutor::new_miss(executor));
+    }
+
+    /// Cache an executor that has changed
+    pub fn update_executor(&self, pubkey: &Pubkey, executor: Arc<dyn Executor>) {
+        self.executors
+            .borrow_mut()
+            .insert(*pubkey, TransactionExecutor::new_updated(executor));
     }
 
     /// Get the completed loader work that can be re-used across execution

programs/bpf_loader/src/lib.rs

@@ -510,7 +510,7 @@ fn process_loader_upgradeable_instruction(
                 use_jit,
                 true,
             )?;
-            invoke_context.add_executor(&new_program_id, executor);
+            invoke_context.update_executor(&new_program_id, executor);
 
             let keyed_accounts = invoke_context.get_keyed_accounts()?;
             let payer = keyed_account_at_index(keyed_accounts, first_instruction_account)?;
@@ -658,7 +658,7 @@ fn process_loader_upgradeable_instruction(
                 use_jit,
                 true,
             )?;
-            invoke_context.add_executor(&new_program_id, executor);
+            invoke_context.update_executor(&new_program_id, executor);
 
             let keyed_accounts = invoke_context.get_keyed_accounts()?;
             let programdata = keyed_account_at_index(keyed_accounts, first_instruction_account)?;
@@ -925,7 +925,7 @@ fn process_loader_instruction(
                 create_executor(first_instruction_account, 0, invoke_context, use_jit, true)?;
             let keyed_accounts = invoke_context.get_keyed_accounts()?;
             let program = keyed_account_at_index(keyed_accounts, first_instruction_account)?;
-            invoke_context.add_executor(program.unsigned_key(), executor);
+            invoke_context.update_executor(program.unsigned_key(), executor);
             program.try_account_ref_mut()?.set_executable(true);
             ic_msg!(
                 invoke_context,

runtime/src/bank.rs

@@ -3516,14 +3516,14 @@ impl Bank {
 
         for key in message.account_keys_iter() {
             if let Some(executor) = cache.get(key) {
-                executors.insert(*key, TransactionExecutor::cached(executor));
+                executors.insert(*key, TransactionExecutor::new_cached(executor));
             }
         }
         for program_indices_of_instruction in program_indices.iter() {
             for account_index in program_indices_of_instruction.iter() {
                 let key = accounts[*account_index].0;
                 if let Some(executor) = cache.get(&key) {
-                    executors.insert(key, TransactionExecutor::cached(executor));
+                    executors.insert(key, TransactionExecutor::new_cached(executor));
                 }
             }
         }
@@ -3532,13 +3532,13 @@ impl Bank {
     }
 
     /// Add executors back to the bank's cache if modified
-    fn update_executors(&self, executors: Rc<RefCell<Executors>>) {
+    fn update_executors(&self, allow_updates: bool, executors: Rc<RefCell<Executors>>) {
         let executors = executors.borrow();
         let dirty_executors: Vec<_> = executors
             .iter()
-            .filter_map(|(key, TransactionExecutor { executor, is_dirty })| {
-                if *is_dirty {
-                    Some((key, executor.clone()))
+            .filter_map(|(key, executor)| {
+                if executor.is_dirty(allow_updates) {
+                    Some((key, executor.get()))
                 } else {
                     None
                 }
@@ -3630,6 +3630,17 @@ impl Bank {
             self.load_accounts_data_len(),
         );
 
+        self.update_executors(process_result.is_ok(), executors);
+
+        let status = process_result
+            .map(|info| {
+                self.store_accounts_data_len(info.accounts_data_len);
+            })
+            .map_err(|err| {
+                error_counters.instruction_error += 1;
+                err
+            });
+
         let log_messages: Option<TransactionLogMessages> =
             log_collector.and_then(|log_collector| {
                 Rc::try_unwrap(log_collector)
@@ -3643,16 +3654,6 @@ impl Bank {
 
         loaded_transaction.accounts = transaction_context.deconstruct();
 
-        let status = process_result
-            .map(|info| {
-                self.store_accounts_data_len(info.accounts_data_len);
-                self.update_executors(executors);
-            })
-            .map_err(|err| {
-                error_counters.instruction_error += 1;
-                err
-            });
-
         TransactionExecutionResult::Executed(TransactionExecutionDetails {
             status,
             log_messages,
@@ -12826,24 +12827,24 @@ pub(crate) mod tests {
 
         // don't do any work if not dirty
         let mut executors = Executors::default();
-        executors.insert(key1, TransactionExecutor::cached(executor.clone()));
-        executors.insert(key2, TransactionExecutor::cached(executor.clone()));
-        executors.insert(key3, TransactionExecutor::cached(executor.clone()));
-        executors.insert(key4, TransactionExecutor::cached(executor.clone()));
+        executors.insert(key1, TransactionExecutor::new_cached(executor.clone()));
+        executors.insert(key2, TransactionExecutor::new_cached(executor.clone()));
+        executors.insert(key3, TransactionExecutor::new_cached(executor.clone()));
+        executors.insert(key4, TransactionExecutor::new_cached(executor.clone()));
         let executors = Rc::new(RefCell::new(executors));
-        executors.borrow_mut().get_mut(&key1).unwrap().is_dirty = false;
-        bank.update_executors(executors);
+        executors.borrow_mut().get_mut(&key1).unwrap().miss();
+        bank.update_executors(true, executors);
         let executors = bank.get_executors(&message, accounts, program_indices);
         assert_eq!(executors.borrow().len(), 0);
 
         // do work
         let mut executors = Executors::default();
-        executors.insert(key1, TransactionExecutor::dirty(executor.clone()));
-        executors.insert(key2, TransactionExecutor::dirty(executor.clone()));
-        executors.insert(key3, TransactionExecutor::dirty(executor.clone()));
-        executors.insert(key4, TransactionExecutor::dirty(executor.clone()));
+        executors.insert(key1, TransactionExecutor::new_miss(executor.clone()));
+        executors.insert(key2, TransactionExecutor::new_miss(executor.clone()));
+        executors.insert(key3, TransactionExecutor::new_miss(executor.clone()));
+        executors.insert(key4, TransactionExecutor::new_miss(executor.clone()));
         let executors = Rc::new(RefCell::new(executors));
-        bank.update_executors(executors);
+        bank.update_executors(true, executors);
         let executors = bank.get_executors(&message, accounts, program_indices);
         assert_eq!(executors.borrow().len(), 4);
         assert!(executors.borrow().contains_key(&key1));
@@ -12893,9 +12894,9 @@ pub(crate) mod tests {
 
         // add one to root bank
         let mut executors = Executors::default();
-        executors.insert(key1, TransactionExecutor::dirty(executor.clone()));
+        executors.insert(key1, TransactionExecutor::new_miss(executor.clone()));
         let executors = Rc::new(RefCell::new(executors));
-        root.update_executors(executors);
+        root.update_executors(true, executors);
         let executors = root.get_executors(&message, accounts, program_indices);
         assert_eq!(executors.borrow().len(), 1);
 
@@ -12908,9 +12909,9 @@ pub(crate) mod tests {
         assert_eq!(executors.borrow().len(), 1);
 
         let mut executors = Executors::default();
-        executors.insert(key2, TransactionExecutor::dirty(executor.clone()));
+        executors.insert(key2, TransactionExecutor::new_miss(executor.clone()));
         let executors = Rc::new(RefCell::new(executors));
-        fork1.update_executors(executors);
+        fork1.update_executors(true, executors);
 
         let executors = fork1.get_executors(&message, accounts, program_indices);
         assert_eq!(executors.borrow().len(), 2);