71 lines
2.1 KiB
Go
71 lines
2.1 KiB
Go
// Copyright 2016 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser 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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// The go-ethereum library 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 Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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//go:build go1.5
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// +build go1.5
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package debug
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import (
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"errors"
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"os"
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"runtime/trace"
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)
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// StartGoTrace turns on tracing, writing to the given file.
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func (a *API) StartGoTrace(file string) error {
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a.logger.Debug("debug_startGoTrace", "file", file)
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a.handler.mu.Lock()
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defer a.handler.mu.Unlock()
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if a.handler.traceFile != nil {
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a.logger.Debug("trace already in progress")
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return errors.New("trace already in progress")
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}
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f, err := os.Create(ExpandHome(file))
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if err != nil {
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a.logger.Debug("failed to create go trace file", "error", err.Error())
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return err
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}
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if err := trace.Start(f); err != nil {
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a.logger.Debug("Go tracing already started", "error", err.Error())
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f.Close()
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return err
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}
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a.handler.traceFile = f
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a.handler.traceFilename = file
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a.logger.Info("Go tracing started", "dump", a.handler.traceFilename)
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return nil
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}
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// StopGoTrace stops an ongoing trace.
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func (a *API) StopGoTrace() error {
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a.logger.Debug("debug_stopGoTrace")
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a.handler.mu.Lock()
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defer a.handler.mu.Unlock()
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trace.Stop()
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if a.handler.traceFile == nil {
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a.logger.Debug("trace not in progress")
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return errors.New("trace not in progress")
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}
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a.logger.Info("Done writing Go trace", "dump", a.handler.traceFilename)
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a.handler.traceFile.Close()
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a.handler.traceFile = nil
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a.handler.traceFilename = ""
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return nil
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}
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