mirror of
https://github.com/rclone/rclone.git
synced 2024-12-11 17:51:12 +01:00
116 lines
2.3 KiB
Go
116 lines
2.3 KiB
Go
/*
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* trace.go
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*
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* Copyright 2017 Bill Zissimopoulos
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*/
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/*
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* This file is part of Cgofuse.
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*
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* It is licensed under the MIT license. The full license text can be found
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* in the License.txt file at the root of this project.
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*/
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package shared
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import (
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"fmt"
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"log"
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"os"
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"path/filepath"
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"runtime"
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)
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var (
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TracePattern = os.Getenv("CGOFUSE_TRACE")
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)
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func traceJoin(deref bool, vals []interface{}) string {
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rslt := ""
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for _, v := range vals {
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if deref {
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switch i := v.(type) {
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case *bool:
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rslt += fmt.Sprintf(", %#v", *i)
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case *int:
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rslt += fmt.Sprintf(", %#v", *i)
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case *int8:
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rslt += fmt.Sprintf(", %#v", *i)
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case *int16:
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rslt += fmt.Sprintf(", %#v", *i)
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case *int32:
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rslt += fmt.Sprintf(", %#v", *i)
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case *int64:
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rslt += fmt.Sprintf(", %#v", *i)
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case *uint:
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rslt += fmt.Sprintf(", %#v", *i)
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case *uint8:
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rslt += fmt.Sprintf(", %#v", *i)
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case *uint16:
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rslt += fmt.Sprintf(", %#v", *i)
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case *uint32:
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rslt += fmt.Sprintf(", %#v", *i)
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case *uint64:
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rslt += fmt.Sprintf(", %#v", *i)
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case *uintptr:
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rslt += fmt.Sprintf(", %#v", *i)
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case *float32:
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rslt += fmt.Sprintf(", %#v", *i)
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case *float64:
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rslt += fmt.Sprintf(", %#v", *i)
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case *complex64:
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rslt += fmt.Sprintf(", %#v", *i)
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case *complex128:
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rslt += fmt.Sprintf(", %#v", *i)
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case *string:
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rslt += fmt.Sprintf(", %#v", *i)
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default:
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rslt += fmt.Sprintf(", %#v", v)
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}
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} else {
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rslt += fmt.Sprintf(", %#v", v)
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}
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}
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if len(rslt) > 0 {
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rslt = rslt[2:]
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}
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return rslt
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}
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func Trace(skip int, prfx string, vals ...interface{}) func(vals ...interface{}) {
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if "" == TracePattern {
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return func(vals ...interface{}) {
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}
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}
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pc, _, _, ok := runtime.Caller(skip + 1)
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name := "<UNKNOWN>"
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if ok {
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fn := runtime.FuncForPC(pc)
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name = fn.Name()
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if m, _ := filepath.Match(TracePattern, name); !m {
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return func(vals ...interface{}) {
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}
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}
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}
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if "" != prfx {
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prfx = prfx + ": "
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}
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args := traceJoin(false, vals)
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return func(vals ...interface{}) {
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form := "%v%v(%v) = %v"
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rslt := ""
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rcvr := recover()
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if nil != rcvr {
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rslt = fmt.Sprintf("!PANIC:%v", rcvr)
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} else {
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if len(vals) != 1 {
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form = "%v%v(%v) = (%v)"
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}
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rslt = traceJoin(true, vals)
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}
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log.Printf(form, prfx, name, args, rslt)
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if nil != rcvr {
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panic(rcvr)
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}
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}
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}
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