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stacktraceGen.go
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stacktraceGen.go
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package sentry
import (
"fmt"
"runtime"
"strings"
"github.com/pkg/errors"
)
type stackTracer interface {
StackTrace() errors.StackTrace
}
type stackTraceFrames []*stackTraceFrame
func (c stackTraceFrames) Len() int { return len(c) }
func (c stackTraceFrames) Swap(i, j int) { c[j], c[i] = c[i], c[j] }
func (c stackTraceFrames) Reverse() {
for i, j := 0, c.Len()-1; i < j; i, j = i+1, j-1 {
c.Swap(i, j)
}
}
func getStacktraceFramesForError(err error) stackTraceFrames {
if err, ok := err.(stackTracer); ok {
frames := stackTraceFrames{}
for _, f := range err.StackTrace() {
pc := uintptr(f) - 1
frame := getStacktraceFrame(pc)
if frame != nil {
frames = append(frames, frame)
}
}
frames.Reverse()
return frames
}
return stackTraceFrames{}
}
func getStacktraceFrames(skip int) stackTraceFrames {
pcs := make([]uintptr, 30)
if c := runtime.Callers(skip+2, pcs); c > 0 {
frames := stackTraceFrames{}
for _, pc := range pcs {
frame := getStacktraceFrame(pc)
if frame != nil {
frames = append(frames, frame)
}
}
frames.Reverse()
return frames
}
return stackTraceFrames{}
}
func getStacktraceFrame(pc uintptr) *stackTraceFrame {
frame := &stackTraceFrame{}
if fn := runtime.FuncForPC(pc); fn != nil {
frame.AbsoluteFilename, frame.Line = fn.FileLine(pc)
frame.Package, frame.Module, frame.Function = formatFuncName(fn.Name())
frame.Filename = shortFilename(frame.AbsoluteFilename, frame.Package)
} else {
frame.AbsoluteFilename = "unknown"
frame.Filename = "unknown"
}
return frame
}
func (f *stackTraceFrame) ClassifyInternal(internalPrefixes []string) {
if f.Module == "main" {
f.InApp = true
return
}
for _, prefix := range internalPrefixes {
if strings.HasPrefix(f.Package, prefix) && !strings.Contains(f.Package, "vendor") {
f.InApp = true
return
}
}
}
// formatFuncName converts a stack frame function name, which is commonly of the form
// 'github.com/SierraSoftworks/sentry-go/v2.TestStackTraceGenerator.func3', into a well-formed
// package, module, and function name.
// For the above example, this will result in the following values being emitted:
// - Package: github.com/SierraSoftworks/sentry-go/v2
// - Module: SierraSoftworks/sentry-go/v2
// - Function: TestStackTraceGenerator.func3
func formatFuncName(fnName string) (pack, module, name string) {
name = fnName
pack = ""
module = ""
name = strings.Replace(name, "·", ".", -1)
packageParts := strings.Split(name, "/")
codeParts := strings.Split(packageParts[len(packageParts)-1], ".")
pack = strings.Join(append(packageParts[:len(packageParts)-1], codeParts[0]), "/")
name = strings.Join(codeParts[1:], ".")
if len(packageParts) > 2 {
module = strings.Join(append(packageParts[2:len(packageParts)-1], codeParts[0]), "/")
} else {
module = codeParts[0]
}
return
}
func shortFilename(absFile, pkg string) string {
if pkg == "" {
return absFile
}
if idx := strings.Index(absFile, fmt.Sprintf("%s/", pkg)); idx != -1 {
return absFile[idx:]
}
return absFile
}