syncthing/cmd/stcrashreceiver/sentry.go

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// Copyright (C) 2019 The Syncthing Authors.
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this file,
// You can obtain one at https://mozilla.org/MPL/2.0/.
package main
import (
"bytes"
"errors"
"io/ioutil"
"regexp"
"strings"
raven "github.com/getsentry/raven-go"
"github.com/maruel/panicparse/stack"
)
const reportServer = "https://crash.syncthing.net/report/"
func sendReport(dsn, path string, report []byte) error {
pkt, err := parseReport(path, report)
if err != nil {
return err
}
cli, err := raven.New(dsn)
if err != nil {
return err
}
// The client sets release and such on the packet before sending, in the
// misguided idea that it knows this better than than the packet we give
// it. So we copy the values from the packet to the client first...
cli.SetRelease(pkt.Release)
cli.SetEnvironment(pkt.Environment)
_, errC := cli.Capture(pkt, nil)
return <-errC
}
func parseReport(path string, report []byte) (*raven.Packet, error) {
parts := bytes.SplitN(report, []byte("\n"), 2)
if len(parts) != 2 {
return nil, errors.New("no first line")
}
version, err := parseVersion(string(parts[0]))
if err != nil {
return nil, err
}
report = parts[1]
foundPanic := false
var subjectLine []byte
for {
parts = bytes.SplitN(report, []byte("\n"), 2)
if len(parts) != 2 {
return nil, errors.New("no panic line found")
}
line := parts[0]
report = parts[1]
if foundPanic {
// The previous line was our "Panic at ..." header. We are now
// at the beginning of the real panic trace and this is our
// subject line.
subjectLine = line
break
} else if bytes.HasPrefix(line, []byte("Panic at")) {
foundPanic = true
}
}
r := bytes.NewReader(report)
ctx, err := stack.ParseDump(r, ioutil.Discard, false)
if err != nil {
return nil, err
}
var trace raven.Stacktrace
for _, gr := range ctx.Goroutines {
if gr.First {
trace.Frames = make([]*raven.StacktraceFrame, len(gr.Stack.Calls))
for i, sc := range gr.Stack.Calls {
trace.Frames[len(trace.Frames)-1-i] = &raven.StacktraceFrame{
Function: sc.Func.Name(),
Module: sc.Func.PkgName(),
Filename: sc.SrcPath,
Lineno: sc.Line,
}
}
break
}
}
pkt := &raven.Packet{
Message: string(subjectLine),
Platform: "go",
Release: version.tag,
Tags: raven.Tags{
raven.Tag{Key: "version", Value: version.version},
raven.Tag{Key: "tag", Value: version.tag},
raven.Tag{Key: "commit", Value: version.commit},
raven.Tag{Key: "codename", Value: version.codename},
raven.Tag{Key: "runtime", Value: version.runtime},
raven.Tag{Key: "goos", Value: version.goos},
raven.Tag{Key: "goarch", Value: version.goarch},
raven.Tag{Key: "builder", Value: version.builder},
},
Extra: raven.Extra{
"url": reportServer + path,
},
Interfaces: []raven.Interface{&trace},
}
return pkt, nil
}
// syncthing v1.1.4-rc.1+30-g6aaae618-dirty-crashrep "Erbium Earthworm" (go1.12.5 darwin-amd64) jb@kvin.kastelo.net 2019-05-23 16:08:14 UTC
var longVersionRE = regexp.MustCompile(`syncthing\s+(v[^\s]+)\s+"([^"]+)"\s\(([^\s]+)\s+([^-]+)-([^)]+)\)\s+([^\s]+)`)
type version struct {
version string // "v1.1.4-rc.1+30-g6aaae618-dirty-crashrep"
tag string // "v1.1.4-rc.1"
commit string // "6aaae618", blank when absent
codename string // "Erbium Earthworm"
runtime string // "go1.12.5"
goos string // "darwin"
goarch string // "amd64"
builder string // "jb@kvin.kastelo.net"
}
func parseVersion(line string) (version, error) {
m := longVersionRE.FindStringSubmatch(line)
if len(m) == 0 {
return version{}, errors.New("unintelligeble version string")
}
v := version{
version: m[1],
codename: m[2],
runtime: m[3],
goos: m[4],
goarch: m[5],
builder: m[6],
}
parts := strings.Split(v.version, "+")
v.tag = parts[0]
if len(parts) > 1 {
fields := strings.Split(parts[1], "-")
if len(fields) >= 2 && strings.HasPrefix(fields[1], "g") {
v.commit = fields[1][1:]
}
}
return v, nil
}