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3eed0580d4
Adds `--opcode.count=<file>` flag to `evm t8n` that writes per-opcode execution frequency counts to a JSON file (relative to `--output.basedir`). --------- Co-authored-by: MariusVanDerWijden <m.vanderwijden@live.de> Co-authored-by: Sina Mahmoodi <itz.s1na@gmail.com>
55 lines
1.7 KiB
Go
55 lines
1.7 KiB
Go
// Copyright 2025 The go-ethereum Authors
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// This file is part of go-ethereum.
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//
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// go-ethereum 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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//
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// go-ethereum 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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//
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// You should have received a copy of the GNU General Public License
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// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
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package native
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import (
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"encoding/json"
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"github.com/ethereum/go-ethereum/core/tracing"
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"github.com/ethereum/go-ethereum/core/vm"
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"github.com/ethereum/go-ethereum/eth/tracers"
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)
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// opcodeCounter is a simple tracer that counts how many times each opcode is executed.
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type opcodeCounter struct {
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counts [256]uint64
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}
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// NewOpcodeCounter returns a new opcodeCounter tracer.
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func NewOpcodeCounter() *tracers.Tracer {
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c := &opcodeCounter{}
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return &tracers.Tracer{
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Hooks: &tracing.Hooks{
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OnOpcode: func(pc uint64, op byte, gas, cost uint64, scope tracing.OpContext, rData []byte, depth int, err error) {
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c.counts[op]++
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},
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},
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GetResult: c.getResult,
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Stop: func(err error) {},
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}
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}
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// getResult returns the opcode counts keyed by opcode name.
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func (c *opcodeCounter) getResult() (json.RawMessage, error) {
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out := make(map[string]uint64)
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for op, count := range c.counts {
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if count != 0 {
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out[vm.OpCode(op).String()] = count
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}
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}
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return json.Marshal(out)
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}
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