89 lines
3.2 KiB
Rust
89 lines
3.2 KiB
Rust
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
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// This file is part of Parity.
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// Parity is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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//! Nonoperative tracer.
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use util::{Bytes, Address, U256};
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use action_params::ActionParams;
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use trace::{Tracer, VMTracer, FlatTrace, TraceError};
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use trace::trace::{Call, Create, VMTrace};
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/// Nonoperative tracer. Does not trace anything.
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pub struct NoopTracer;
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impl Tracer for NoopTracer {
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fn prepare_trace_call(&self, _: &ActionParams) -> Option<Call> {
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None
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}
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fn prepare_trace_create(&self, _: &ActionParams) -> Option<Create> {
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None
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}
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fn prepare_trace_output(&self) -> Option<Bytes> {
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None
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}
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fn trace_call(&mut self, call: Option<Call>, _: U256, output: Option<Bytes>, _: Vec<FlatTrace>) {
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assert!(call.is_none(), "self.prepare_trace_call().is_none(): so we can't be tracing: qed");
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assert!(output.is_none(), "self.prepare_trace_output().is_none(): so we can't be tracing: qed");
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}
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fn trace_create(&mut self, create: Option<Create>, _: U256, code: Option<Bytes>, _: Address, _: Vec<FlatTrace>) {
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assert!(create.is_none(), "self.prepare_trace_create().is_none(): so we can't be tracing: qed");
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assert!(code.is_none(), "self.prepare_trace_output().is_none(): so we can't be tracing: qed");
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}
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fn trace_failed_call(&mut self, call: Option<Call>, _: Vec<FlatTrace>, _: TraceError) {
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assert!(call.is_none(), "self.prepare_trace_call().is_none(): so we can't be tracing: qed");
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}
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fn trace_failed_create(&mut self, create: Option<Create>, _: Vec<FlatTrace>, _: TraceError) {
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assert!(create.is_none(), "self.prepare_trace_create().is_none(): so we can't be tracing: qed");
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}
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fn trace_suicide(&mut self, _address: Address, _balance: U256, _refund_address: Address) {
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}
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fn subtracer(&self) -> Self {
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NoopTracer
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}
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fn traces(self) -> Vec<FlatTrace> {
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vec![]
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}
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}
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/// Nonoperative VM tracer. Does not trace anything.
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pub struct NoopVMTracer;
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impl VMTracer for NoopVMTracer {
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/// Trace the preparation to execute a single instruction.
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fn trace_prepare_execute(&mut self, _pc: usize, _instruction: u8, _stack_pop: usize, _gas_cost: &U256) -> bool { false }
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/// Trace the finalised execution of a single instruction.
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fn trace_executed(&mut self, _gas_used: U256, _stack_push: &[U256], _mem_diff: Option<(usize, &[u8])>, _store_diff: Option<(U256, U256)>) {}
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/// Spawn subtracer which will be used to trace deeper levels of execution.
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fn prepare_subtrace(&self, _code: &[u8]) -> Self { NoopVMTracer }
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/// Spawn subtracer which will be used to trace deeper levels of execution.
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fn done_subtrace(&mut self, _sub: Self) {}
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/// Consumes self and returns all VM traces.
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fn drain(self) -> Option<VMTrace> { None }
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}
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