cmount: Vendor github.com/billziss-gh/cgofuse

2017-05-15 16:56:47 +01:00
parent b553c23d5b
commit ea0bc278ba
17 changed files with 3333 additions and 1 deletions
@@ -0,0 +1,115 @@
+/*
+ * trace.go
+ *
+ * Copyright 2017 Bill Zissimopoulos
+ */
+/*
+ * This file is part of Cgofuse.
+ *
+ * It is licensed under the MIT license. The full license text can be found
+ * in the License.txt file at the root of this project.
+ */
+
+package shared
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"path/filepath"
+	"runtime"
+)
+
+var (
+	TracePattern = os.Getenv("CGOFUSE_TRACE")
+)
+
+func traceJoin(deref bool, vals []interface{}) string {
+	rslt := ""
+	for _, v := range vals {
+		if deref {
+			switch i := v.(type) {
+			case *bool:
+				rslt += fmt.Sprintf(", %#v", *i)
+			case *int:
+				rslt += fmt.Sprintf(", %#v", *i)
+			case *int8:
+				rslt += fmt.Sprintf(", %#v", *i)
+			case *int16:
+				rslt += fmt.Sprintf(", %#v", *i)
+			case *int32:
+				rslt += fmt.Sprintf(", %#v", *i)
+			case *int64:
+				rslt += fmt.Sprintf(", %#v", *i)
+			case *uint:
+				rslt += fmt.Sprintf(", %#v", *i)
+			case *uint8:
+				rslt += fmt.Sprintf(", %#v", *i)
+			case *uint16:
+				rslt += fmt.Sprintf(", %#v", *i)
+			case *uint32:
+				rslt += fmt.Sprintf(", %#v", *i)
+			case *uint64:
+				rslt += fmt.Sprintf(", %#v", *i)
+			case *uintptr:
+				rslt += fmt.Sprintf(", %#v", *i)
+			case *float32:
+				rslt += fmt.Sprintf(", %#v", *i)
+			case *float64:
+				rslt += fmt.Sprintf(", %#v", *i)
+			case *complex64:
+				rslt += fmt.Sprintf(", %#v", *i)
+			case *complex128:
+				rslt += fmt.Sprintf(", %#v", *i)
+			case *string:
+				rslt += fmt.Sprintf(", %#v", *i)
+			default:
+				rslt += fmt.Sprintf(", %#v", v)
+			}
+		} else {
+			rslt += fmt.Sprintf(", %#v", v)
+		}
+	}
+	if len(rslt) > 0 {
+		rslt = rslt[2:]
+	}
+	return rslt
+}
+
+func Trace(skip int, prfx string, vals ...interface{}) func(vals ...interface{}) {
+	if "" == TracePattern {
+		return func(vals ...interface{}) {
+		}
+	}
+	pc, _, _, ok := runtime.Caller(skip + 1)
+	name := "<UNKNOWN>"
+	if ok {
+		fn := runtime.FuncForPC(pc)
+		name = fn.Name()
+		if m, _ := filepath.Match(TracePattern, name); !m {
+			return func(vals ...interface{}) {
+			}
+		}
+	}
+	if "" != prfx {
+		prfx = prfx + ": "
+	}
+	args := traceJoin(false, vals)
+	return func(vals ...interface{}) {
+		form := "%v%v(%v) = %v"
+		rslt := ""
+		rcvr := recover()
+		if nil != rcvr {
+			rslt = fmt.Sprintf("!PANIC:%v", rcvr)
+		} else {
+			if len(vals) != 1 {
+				form = "%v%v(%v) = (%v)"
+			}
+			rslt = traceJoin(true, vals)
+		}
+		log.Printf(form, prfx, name, args, rslt)
+		if nil != rcvr {
+			panic(rcvr)
+		}
+	}
+}