/
kernel.go
85 lines (74 loc) · 2.09 KB
/
kernel.go
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// Licensed to Apache Software Foundation (ASF) under one or more contributor
// license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright
// ownership. Apache Software Foundation (ASF) licenses this file to you 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 profiling
import (
"bufio"
"fmt"
"math"
"os"
"strconv"
"strings"
"github.com/apache/skywalking-rover/pkg/tools/host"
)
type KernelFinder struct {
kernelFileExists bool
}
func NewKernelFinder() *KernelFinder {
stat, _ := os.Stat(host.GetFileInHost(KernelSymbolFilePath))
return &KernelFinder{kernelFileExists: stat != nil}
}
func (k *KernelFinder) IsSupport(filepath string) bool {
if filepath != KernelSymbolFilePath {
return false
}
stat, _ := os.Stat(filepath)
return stat != nil
}
func (k *KernelFinder) Analyze(filepath string) (*Info, error) {
kernelPath, err := os.Open(filepath)
if err != nil {
return nil, err
}
scanner := bufio.NewScanner(kernelPath)
symbols := make([]*Symbol, 0)
for scanner.Scan() {
info := strings.Split(scanner.Text(), " ")
atoi, err := strconv.ParseUint(info[0], 16, 64)
if err != nil {
return nil, fmt.Errorf("error read addr: %s, %v", info[0], err)
}
symbols = append(symbols, &Symbol{
Name: info[2],
Location: atoi,
Size: 0,
})
}
kernelModule := &Module{
Name: "kernel",
Symbols: symbols,
// kernel module could handling all symbols
Ranges: []*ModuleRange{
{
StartAddr: 0,
EndAddr: math.MaxUint64,
},
},
}
return NewInfo(map[string]*Module{
"kernel": kernelModule,
}), nil
}