127 lines
2.9 KiB
Go
127 lines
2.9 KiB
Go
package errors
|
|
|
|
import (
|
|
"strconv"
|
|
"strings"
|
|
)
|
|
|
|
type uncaughtPanic struct{ message string }
|
|
|
|
func (p uncaughtPanic) Error() string {
|
|
return p.message
|
|
}
|
|
|
|
// ParsePanic allows you to get an error object from the output of a go program
|
|
// that panicked. This is particularly useful with https://github.com/mitchellh/panicwrap.
|
|
func ParsePanic(text string) (*Error, error) {
|
|
lines := strings.Split(text, "\n")
|
|
|
|
state := "start"
|
|
|
|
var message string
|
|
var stack []StackFrame
|
|
|
|
for i := 0; i < len(lines); i++ {
|
|
line := lines[i]
|
|
|
|
if state == "start" {
|
|
if strings.HasPrefix(line, "panic: ") {
|
|
message = strings.TrimPrefix(line, "panic: ")
|
|
state = "seek"
|
|
} else {
|
|
return nil, Errorf("bugsnag.panicParser: Invalid line (no prefix): %s", line)
|
|
}
|
|
|
|
} else if state == "seek" {
|
|
if strings.HasPrefix(line, "goroutine ") && strings.HasSuffix(line, "[running]:") {
|
|
state = "parsing"
|
|
}
|
|
|
|
} else if state == "parsing" {
|
|
if line == "" {
|
|
state = "done"
|
|
break
|
|
}
|
|
createdBy := false
|
|
if strings.HasPrefix(line, "created by ") {
|
|
line = strings.TrimPrefix(line, "created by ")
|
|
createdBy = true
|
|
}
|
|
|
|
i++
|
|
|
|
if i >= len(lines) {
|
|
return nil, Errorf("bugsnag.panicParser: Invalid line (unpaired): %s", line)
|
|
}
|
|
|
|
frame, err := parsePanicFrame(line, lines[i], createdBy)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
stack = append(stack, *frame)
|
|
if createdBy {
|
|
state = "done"
|
|
break
|
|
}
|
|
}
|
|
}
|
|
|
|
if state == "done" || state == "parsing" {
|
|
return &Error{Err: uncaughtPanic{message}, frames: stack}, nil
|
|
}
|
|
return nil, Errorf("could not parse panic: %v", text)
|
|
}
|
|
|
|
// The lines we're passing look like this:
|
|
//
|
|
// main.(*foo).destruct(0xc208067e98)
|
|
// /0/go/src/github.com/bugsnag/bugsnag-go/pan/main.go:22 +0x151
|
|
func parsePanicFrame(name string, line string, createdBy bool) (*StackFrame, error) {
|
|
idx := strings.LastIndex(name, "(")
|
|
if idx == -1 && !createdBy {
|
|
return nil, Errorf("bugsnag.panicParser: Invalid line (no call): %s", name)
|
|
}
|
|
if idx != -1 {
|
|
name = name[:idx]
|
|
}
|
|
pkg := ""
|
|
|
|
if lastslash := strings.LastIndex(name, "/"); lastslash >= 0 {
|
|
pkg += name[:lastslash] + "/"
|
|
name = name[lastslash+1:]
|
|
}
|
|
if period := strings.Index(name, "."); period >= 0 {
|
|
pkg += name[:period]
|
|
name = name[period+1:]
|
|
}
|
|
|
|
name = strings.Replace(name, "·", ".", -1)
|
|
|
|
if !strings.HasPrefix(line, "\t") {
|
|
return nil, Errorf("bugsnag.panicParser: Invalid line (no tab): %s", line)
|
|
}
|
|
|
|
idx = strings.LastIndex(line, ":")
|
|
if idx == -1 {
|
|
return nil, Errorf("bugsnag.panicParser: Invalid line (no line number): %s", line)
|
|
}
|
|
file := line[1:idx]
|
|
|
|
number := line[idx+1:]
|
|
if idx = strings.Index(number, " +"); idx > -1 {
|
|
number = number[:idx]
|
|
}
|
|
|
|
lno, err := strconv.ParseInt(number, 10, 32)
|
|
if err != nil {
|
|
return nil, Errorf("bugsnag.panicParser: Invalid line (bad line number): %s", line)
|
|
}
|
|
|
|
return &StackFrame{
|
|
File: file,
|
|
LineNumber: int(lno),
|
|
Package: pkg,
|
|
Name: name,
|
|
}, nil
|
|
}
|