kamilsk/tracer

package tracer

import "runtime"

// Caller returns information about a caller at position after the skip steps.
//
//  func StoreToDatabase(data Payload) error {
//      defer stats.NewTiming().Send(Caller(2).Name)
//
//      // do something heavy
//  }
//
func Caller(skip int) CallerInfo {
    pc := make([]uintptr, 1)
    runtime.Callers(skip, pc)
    f := runtime.FuncForPC(pc[0])
    file, line := f.FileLine(pc[0])
    return CallerInfo{f.Entry(), f.Name(), file, line}
}

// CallerInfo holds information about a caller.
type CallerInfo struct {
    Entry uintptr // the entry address of the function
    Name  string  // the name of the function
    File  string  // the file name and
    Line  int     // line number of the source code of the function
}