Merge pull request #6842 from paritytech/td-evm-json

Fix JSON tracing for sub-calls.

ethcore/src/client/client.rs

@@ -1142,7 +1142,7 @@ impl Client {
 			state_diff: bool,
 			transaction: &SignedTransaction,
 			options: TransactOptions<T, V>,
-		) -> Result<Executed, CallError> where
+		) -> Result<Executed<T::Output, V::Output>, CallError> where
 			T: trace::Tracer,
 			V: trace::VMTracer,
 		{

ethcore/src/client/evm_test_client.rs

@@ -197,7 +197,7 @@ impl<'a> EvmTestClient<'a> {
 		env_info: &client::EnvInfo,
 		transaction: transaction::SignedTransaction,
 		vm_tracer: T,
-	) -> TransactResult {
+	) -> TransactResult<T::Output> {
 		let initial_gas = transaction.gas;
 		// Verify transaction
 		let is_ok = transaction.verify_basic(true, None, env_info.number >= self.spec.engine.params().eip86_transition);
@@ -218,7 +218,8 @@ impl<'a> EvmTestClient<'a> {
 				TransactResult::Ok {
 					state_root: *self.state.root(),
 					gas_left: initial_gas - result.receipt.gas_used,
-					output: result.output
+					output: result.output,
+					vm_trace: result.vm_trace,
 				}
 			},
 			Err(error) => TransactResult::Err {
@@ -230,7 +231,7 @@ impl<'a> EvmTestClient<'a> {
 }
 
 /// A result of applying transaction to the state.
-pub enum TransactResult {
+pub enum TransactResult<T> {
 	/// Successful execution
 	Ok {
 		/// State root
@@ -239,6 +240,8 @@ pub enum TransactResult {
 		gas_left: U256,
 		/// Output
 		output: Vec<u8>,
+		/// VM Traces
+		vm_trace: Option<T>,
 	},
 	/// Transaction failed to run
 	Err {

ethcore/src/executed.rs

@@ -29,7 +29,7 @@ use std::fmt;
 
 /// Transaction execution receipt.
 #[derive(Debug, PartialEq, Clone)]
-pub struct Executed {
+pub struct Executed<T = FlatTrace, V = VMTrace> {
 	/// True if the outer call/create resulted in an exceptional exit.
 	pub exception: Option<vm::Error>,
 
@@ -63,9 +63,9 @@ pub struct Executed {
 	/// Transaction output.
 	pub output: Bytes,
 	/// The trace of this transaction.
-	pub trace: Vec<FlatTrace>,
+	pub trace: Vec<T>,
 	/// The VM trace of this transaction.
-	pub vm_trace: Option<VMTrace>,
+	pub vm_trace: Option<V>,
 	/// The state diff, if we traced it.
 	pub state_diff: Option<StateDiff>,
 }

ethcore/src/executive.rs

@@ -30,7 +30,7 @@ use evm::{CallType, Factory, Finalize, FinalizationResult};
 use vm::{self, Ext, CreateContractAddress, ReturnData, CleanDustMode, ActionParams, ActionValue};
 use wasm;
 use externalities::*;
-use trace::{self, FlatTrace, VMTrace, Tracer, VMTracer};
+use trace::{self, Tracer, VMTracer};
 use transaction::{Action, SignedTransaction};
 use crossbeam;
 pub use executed::{Executed, ExecutionResult};
@@ -214,7 +214,7 @@ impl<'a, B: 'a + StateBackend> Executive<'a, B> {
 
 	/// This function should be used to execute transaction.
 	pub fn transact<T, V>(&'a mut self, t: &SignedTransaction, options: TransactOptions<T, V>)
-		-> Result<Executed, ExecutionError> where T: Tracer, V: VMTracer,
+		-> Result<Executed<T::Output, V::Output>, ExecutionError> where T: Tracer, V: VMTracer,
 	{
 		self.transact_with_tracer(t, options.check_nonce, options.output_from_init_contract, options.tracer, options.vm_tracer)
 	}
@@ -223,7 +223,7 @@ impl<'a, B: 'a + StateBackend> Executive<'a, B> {
 	/// This will ensure the caller has enough balance to execute the desired transaction.
 	/// Used for extra-block executions for things like consensus contracts and RPCs
 	pub fn transact_virtual<T, V>(&'a mut self, t: &SignedTransaction, options: TransactOptions<T, V>)
-		-> Result<Executed, ExecutionError> where T: Tracer, V: VMTracer,
+		-> Result<Executed<T::Output, V::Output>, ExecutionError> where T: Tracer, V: VMTracer,
 	{
 		let sender = t.sender();
 		let balance = self.state.balance(&sender)?;
@@ -244,7 +244,7 @@ impl<'a, B: 'a + StateBackend> Executive<'a, B> {
 		output_from_create: bool,
 		mut tracer: T,
 		mut vm_tracer: V
-	) -> Result<Executed, ExecutionError> where T: Tracer, V: VMTracer {
+	) -> Result<Executed<T::Output, V::Output>, ExecutionError> where T: Tracer, V: VMTracer {
 		let sender = t.sender();
 		let nonce = self.state.nonce(&sender)?;
 
@@ -587,15 +587,15 @@ impl<'a, B: 'a + StateBackend> Executive<'a, B> {
 	}
 
 	/// Finalizes the transaction (does refunds and suicides).
-	fn finalize(
+	fn finalize<T, V>(
 		&mut self,
 		t: &SignedTransaction,
 		mut substate: Substate,
 		result: vm::Result<FinalizationResult>,
 		output: Bytes,
-		trace: Vec<FlatTrace>,
-		vm_trace: Option<VMTrace>
-	) -> ExecutionResult {
+		trace: Vec<T>,
+		vm_trace: Option<V>
+	) -> Result<Executed<T, V>, ExecutionError> {
 		let schedule = self.machine.schedule(self.info.number);
 
 		// refunds from SSTORE nonzero -> zero

ethcore/src/state/mod.rs

@@ -62,19 +62,19 @@ pub use self::backend::Backend;
 pub use self::substate::Substate;
 
 /// Used to return information about an `State::apply` operation.
-pub struct ApplyOutcome {
+pub struct ApplyOutcome<T, V> {
 	/// The receipt for the applied transaction.
 	pub receipt: Receipt,
 	/// The output of the applied transaction.
 	pub output: Bytes,
 	/// The trace for the applied transaction, empty if tracing was not produced.
-	pub trace: Vec<FlatTrace>,
+	pub trace: Vec<T>,
 	/// The VM trace for the applied transaction, None if tracing was not produced.
-	pub vm_trace: Option<VMTrace>
+	pub vm_trace: Option<V>
 }
 
 /// Result type for the execution ("application") of a transaction.
-pub type ApplyResult = Result<ApplyOutcome, Error>;
+pub type ApplyResult<T, V> = Result<ApplyOutcome<T, V>, Error>;
 
 /// Return type of proof validity check.
 #[derive(Debug, Clone)]
@@ -668,7 +668,7 @@ impl<B: Backend> State<B> {
 
 	/// Execute a given transaction, producing a receipt and an optional trace.
 	/// This will change the state accordingly.
-	pub fn apply(&mut self, env_info: &EnvInfo, machine: &Machine, t: &SignedTransaction, tracing: bool) -> ApplyResult {
+	pub fn apply(&mut self, env_info: &EnvInfo, machine: &Machine, t: &SignedTransaction, tracing: bool) -> ApplyResult<FlatTrace, VMTrace> {
 		if tracing {
 			let options = TransactOptions::with_tracing();
 			self.apply_with_tracing(env_info, machine, t, options.tracer, options.vm_tracer)
@@ -687,7 +687,7 @@ impl<B: Backend> State<B> {
 		t: &SignedTransaction,
 		tracer: T,
 		vm_tracer: V,
-	) -> ApplyResult where
+	) -> ApplyResult<T::Output, V::Output> where
 		T: trace::Tracer,
 		V: trace::VMTracer,
 	{
@@ -728,7 +728,7 @@ impl<B: Backend> State<B> {
 	// `virt` signals that we are executing outside of a block set and restrictions like
 	// gas limits and gas costs should be lifted.
 	fn execute<T, V>(&mut self, env_info: &EnvInfo, machine: &Machine, t: &SignedTransaction, options: TransactOptions<T, V>, virt: bool)
-		-> Result<Executed, ExecutionError> where T: trace::Tracer, V: trace::VMTracer,
+		-> Result<Executed<T::Output, V::Output>, ExecutionError> where T: trace::Tracer, V: trace::VMTracer,
 	{
 		let mut e = Executive::new(self, env_info, machine);
 

ethcore/src/trace/executive_tracer.rs

@@ -83,6 +83,8 @@ fn should_prefix_address_properly() {
 }
 
 impl Tracer for ExecutiveTracer {
+	type Output = FlatTrace;
+
 	fn prepare_trace_call(&self, params: &ActionParams) -> Option<Call> {
 		Some(Call::from(params.clone()))
 	}
@@ -201,6 +203,8 @@ impl ExecutiveVMTracer {
 }
 
 impl VMTracer for ExecutiveVMTracer {
+	type Output = VMTrace;
+
 	fn trace_next_instruction(&mut self, _pc: usize, _instruction: u8) -> bool { true }
 
 	fn trace_prepare_execute(&mut self, pc: usize, instruction: u8, gas_cost: U256) {

ethcore/src/trace/mod.rs

@@ -48,6 +48,9 @@ use header::BlockNumber;
 
 /// This trait is used by executive to build traces.
 pub trait Tracer: Send {
+	/// Data returned when draining the Tracer.
+	type Output;
+
 	/// Prepares call trace for given params. Noop tracer should return None.
 	fn prepare_trace_call(&self, params: &ActionParams) -> Option<Call>;
 
@@ -63,7 +66,7 @@ pub trait Tracer: Send {
 		call: Option<Call>,
 		gas_used: U256,
 		output: Option<Bytes>,
-		subs: Vec<FlatTrace>,
+		subs: Vec<Self::Output>,
 	);
 
 	/// Stores trace create info.
@@ -73,14 +76,14 @@ pub trait Tracer: Send {
 		gas_used: U256,
 		code: Option<Bytes>,
 		address: Address,
-		subs: Vec<FlatTrace>
+		subs: Vec<Self::Output>
 	);
 
 	/// Stores failed call trace.
-	fn trace_failed_call(&mut self, call: Option<Call>, subs: Vec<FlatTrace>, error: TraceError);
+	fn trace_failed_call(&mut self, call: Option<Call>, subs: Vec<Self::Output>, error: TraceError);
 
 	/// Stores failed create trace.
-	fn trace_failed_create(&mut self, create: Option<Create>, subs: Vec<FlatTrace>, error: TraceError);
+	fn trace_failed_create(&mut self, create: Option<Create>, subs: Vec<Self::Output>, error: TraceError);
 
 	/// Stores suicide info.
 	fn trace_suicide(&mut self, address: Address, balance: U256, refund_address: Address);
@@ -92,12 +95,15 @@ pub trait Tracer: Send {
 	fn subtracer(&self) -> Self where Self: Sized;
 
 	/// Consumes self and returns all traces.
-	fn drain(self) -> Vec<FlatTrace>;
+	fn drain(self) -> Vec<Self::Output>;
 }
 
 /// Used by executive to build VM traces.
 pub trait VMTracer: Send {
 
+	/// Data returned when draining the VMTracer.
+	type Output;
+
 	/// Trace the progression of interpreter to next instruction.
 	/// If tracer returns `false` it won't be called again.
 	/// @returns true if `trace_prepare_execute` and `trace_executed` should be called.
@@ -116,7 +122,7 @@ pub trait VMTracer: Send {
 	fn done_subtrace(&mut self, sub: Self) where Self: Sized;
 
 	/// Consumes self and returns the VM trace.
-	fn drain(self) -> Option<VMTrace>;
+	fn drain(self) -> Option<Self::Output>;
 }
 
 /// `DbExtras` provides an interface to query extra data which is not stored in tracesdb,

ethcore/src/trace/noop_tracer.rs

@@ -27,6 +27,8 @@ use trace::trace::{Call, Create, VMTrace, RewardType};
 pub struct NoopTracer;
 
 impl Tracer for NoopTracer {
+	type Output = FlatTrace;
+
 	fn prepare_trace_call(&self, _: &ActionParams) -> Option<Call> {
 		None
 	}
@@ -76,6 +78,8 @@ impl Tracer for NoopTracer {
 pub struct NoopVMTracer;
 
 impl VMTracer for NoopVMTracer {
+	type Output = VMTrace;
+
 	fn trace_next_instruction(&mut self, _pc: usize, _instruction: u8) -> bool { false }
 
 	fn trace_prepare_execute(&mut self, _pc: usize, _instruction: u8, _gas_cost: U256) {}