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- // Copyright 2016 The go-ethereum Authors
- // This file is part of the go-ethereum library.
- //
- // The go-ethereum library is free software: you can redistribute it and/or modify
- // it under the terms of the GNU Lesser General Public License as published by
- // the Free Software Foundation, either version 3 of the License, or
- // (at your option) any later version.
- //
- // The go-ethereum library is distributed in the hope that it will be useful,
- // but WITHOUT ANY WARRANTY; without even the implied warranty of
- // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- // GNU Lesser General Public License for more details.
- //
- // You should have received a copy of the GNU Lesser General Public License
- // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
- //+build go1.5
- package debug
- import (
- "errors"
- "os"
- "runtime/trace"
- "github.com/ethereum/go-ethereum/log"
- )
- // StartGoTrace turns on tracing, writing to the given file.
- func (h *HandlerT) StartGoTrace(file string) error {
- h.mu.Lock()
- defer h.mu.Unlock()
- if h.traceW != nil {
- return errors.New("trace already in progress")
- }
- f, err := os.Create(expandHome(file))
- if err != nil {
- return err
- }
- if err := trace.Start(f); err != nil {
- f.Close()
- return err
- }
- h.traceW = f
- h.traceFile = file
- log.Info("Go tracing started", "dump", h.traceFile)
- return nil
- }
- // StopTrace stops an ongoing trace.
- func (h *HandlerT) StopGoTrace() error {
- h.mu.Lock()
- defer h.mu.Unlock()
- trace.Stop()
- if h.traceW == nil {
- return errors.New("trace not in progress")
- }
- log.Info("Done writing Go trace", "dump", h.traceFile)
- h.traceW.Close()
- h.traceW = nil
- h.traceFile = ""
- return nil
- }
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