move the actor logs into the trace

fvm/src/call_manager/default.rs

@@ -513,6 +513,10 @@ where
 
         Ok(())
     }
+
+    fn log(&mut self, msg: String) {
+        self.trace(ExecutionEvent::Log(msg))
+    }
 }
 
 impl<M> DefaultCallManager<M>

fvm/src/call_manager/mod.rs

@@ -174,6 +174,9 @@ pub trait CallManager: 'static {
 
     /// Appends an event to the event accumulator.
     fn append_event(&mut self, evt: StampedEvent);
+
+    /// log
+    fn log(&mut self, msg: String);
 }
 
 /// The result of calling actor's entrypoint

fvm/src/kernel/default.rs

@@ -951,8 +951,8 @@ impl<C> DebugOps for DefaultKernel<C>
 where
     C: CallManager,
 {
-    fn log(&self, msg: String) {
-        println!("{}", msg)
+    fn log(&mut self, msg: String) {
+        self.call_manager.log(msg)
     }
 
     fn debug_enabled(&self) -> bool {

fvm/src/kernel/mod.rs

@@ -285,7 +285,7 @@ pub trait RandomnessOps {
 #[delegatable_trait]
 pub trait DebugOps {
     /// Log a message.
-    fn log(&self, msg: String);
+    fn log(&mut self, msg: String);
 
     /// Returns whether debug mode is enabled.
     fn debug_enabled(&self) -> bool;

fvm/src/trace/mod.rs

@@ -38,4 +38,5 @@ pub enum ExecutionEvent {
         id: ActorID,
         state: ActorState,
     },
+    Log(String),
 }

fvm/tests/dummy.rs

@@ -404,4 +404,8 @@ impl CallManager for DummyCallManager {
     ) -> fvm::kernel::Result<()> {
         todo!()
     }
+
+    fn log(&mut self, _msg: String) {
+        todo!()
+    }
 }