github.com/matrixorigin/matrixone@v0.7.0/pkg/vm/engine/tae/stl/debug.go (about)

     1  // Copyright 2022 Matrix Origin
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  // http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package stl
    16  
    17  import (
    18  	"bytes"
    19  	"runtime"
    20  	"strconv"
    21  	"sync"
    22  )
    23  
    24  var (
    25  	_callersPool = sync.Pool{
    26  		New: func() interface{} {
    27  			return newCallers(32)
    28  		},
    29  	}
    30  )
    31  
    32  func GetCalllers(skip int) *Callers {
    33  	c := _callersPool.Get()
    34  	cc := c.(*Callers)
    35  	var n int
    36  	for {
    37  		n = runtime.Callers(skip+2, cc.storage)
    38  		if n < len(cc.storage) {
    39  			break
    40  		}
    41  		size := len(cc.storage)
    42  		cc.Close()
    43  		cc = newCallers(size * 2)
    44  	}
    45  	cc.num = n
    46  	return cc
    47  }
    48  
    49  type Callers struct {
    50  	storage []uintptr
    51  	num     int
    52  }
    53  
    54  func newCallers(size int) *Callers {
    55  	return &Callers{
    56  		storage: make([]uintptr, size),
    57  	}
    58  }
    59  
    60  func (c *Callers) Close() {
    61  	c.num = 0
    62  	_callersPool.Put(c)
    63  }
    64  
    65  func (c *Callers) String() string {
    66  	var buffer bytes.Buffer
    67  	i := 0
    68  	frames := runtime.CallersFrames(c.storage[:c.num])
    69  	for frame, more := frames.Next(); more; frame, more = frames.Next() {
    70  		if i != 0 {
    71  			buffer.WriteByte('\n')
    72  		}
    73  		i++
    74  		// buffer.WriteByte('[')
    75  		// buffer.WriteString(frame.Function)
    76  		// buffer.WriteByte(']')
    77  		// buffer.WriteByte('|')
    78  		buffer.WriteString(frame.File)
    79  		buffer.WriteByte(':')
    80  		buffer.WriteString(strconv.Itoa(frame.Line))
    81  	}
    82  	return buffer.String()
    83  }