add goroutine id retrieving feature for package gdebug

debug/gdebug/gdebug_grid.go

@@ -0,0 +1,29 @@
+// Copyright 2019-2020 gf Author(https://github.com/gogf/gf). All Rights Reserved.
+//
+// This Source Code Form is subject to the terms of the MIT License.
+// If a copy of the MIT was not distributed with this file,
+// You can obtain one at https://github.com/gogf/gf.
+
+package gdebug
+
+import (
+	"regexp"
+	"runtime"
+	"strconv"
+)
+
+var (
+	// gridRegex is the regular expression object for parsing goroutine id from stack information.
+	gridRegex = regexp.MustCompile(`^\w+\s+(\d+)\s+`)
+)
+
+// GoroutineId retrieves and returns the current goroutine id from stack information.
+// Be very aware that, it is with low performance as it uses runtime.Stack function.
+// It is commonly used for debugging purpose.
+func GoroutineId() int {
+	buf := make([]byte, 26)
+	runtime.Stack(buf, false)
+	match := gridRegex.FindSubmatch(buf)
+	id, _ := strconv.Atoi(string(match[1]))
+	return id
+}