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author | Josh Bleecher Snyder <josharian@gmail.com> | 2017-02-11 14:56:16 -0800 |
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committer | Josh Bleecher Snyder <josharian@gmail.com> | 2017-02-13 06:10:35 +0000 |
commit | 8da91a6297d5960b69ca22d764ef73906f6d61e9 (patch) | |
tree | a8955873b81333e24ddcfb9e16ebfa1ab53911e7 /src/runtime/example_test.go | |
parent | 39fcf8bf0e3a3b447780983c1f88df5bb9f5bc98 (diff) | |
download | go-8da91a6297d5960b69ca22d764ef73906f6d61e9.tar.gz go-8da91a6297d5960b69ca22d764ef73906f6d61e9.zip |
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 <josharian@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Diffstat (limited to 'src/runtime/example_test.go')
-rw-r--r-- | src/runtime/example_test.go | 39 |
1 files changed, 39 insertions, 0 deletions
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 +} |