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