43 lines
1.2 KiB
Go
43 lines
1.2 KiB
Go
// Go support for leveled logs, analogous to https://code.google.com/p/google-glog/
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//
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// Copyright 2013 Google Inc. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package dbg provides some helper code for call traces.
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package dbg
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import (
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"runtime"
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)
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// Stacks is a wrapper for runtime.Stack that attempts to recover the data for
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// all goroutines or the calling one.
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func Stacks(all bool) []byte {
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// We don't know how big the traces are, so grow a few times if they don't fit. Start large, though.
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n := 10000
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if all {
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n = 100000
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}
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var trace []byte
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for i := 0; i < 5; i++ {
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trace = make([]byte, n)
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nbytes := runtime.Stack(trace, all)
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if nbytes < len(trace) {
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return trace[:nbytes]
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}
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n *= 2
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}
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return trace
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}
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