From 8da91a6297d5960b69ca22d764ef73906f6d61e9 Mon Sep 17 00:00:00 2001 From: Josh Bleecher Snyder Date: Sat, 11 Feb 2017 14:56:16 -0800 Subject: [PATCH] runtime: add Frames example Based on sample code from iant. Fixes #18788. Change-Id: I6bb33ed05af2538fbde42ddcac629280ef7c00a6 Reviewed-on: https://go-review.googlesource.com/36892 Run-TryBot: Josh Bleecher Snyder Reviewed-by: Ian Lance Taylor --- src/runtime/example_test.go | 39 +++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 src/runtime/example_test.go diff --git a/src/runtime/example_test.go b/src/runtime/example_test.go new file mode 100644 index 0000000000..f817b595e6 --- /dev/null +++ b/src/runtime/example_test.go @@ -0,0 +1,39 @@ +// Copyright 2017 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package runtime_test + +import ( + "fmt" + "runtime" +) + +func ExampleFrames() { + c := func() { + pc := make([]uintptr, 5) + n := runtime.Callers(0, pc) + if n == 0 { + return + } + + frames := runtime.CallersFrames(pc[:n]) + var frame runtime.Frame + more := true + for more { + frame, more = frames.Next() + fmt.Printf("- more:%v | %s\n", more, frame.Function) + } + } + + b := func() { c() } + a := func() { b() } + + a() + // Output: + // - more:true | runtime.Callers + // - more:true | runtime_test.ExampleFrames.func1 + // - more:true | runtime_test.ExampleFrames.func2 + // - more:true | runtime_test.ExampleFrames.func3 + // - more:false | runtime_test.ExampleFrames +} -- 2.50.0