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|
package main
import (
"context"
"fmt"
"log"
"os"
"sync"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/mongo"
"go.mongodb.org/mongo-driver/mongo/options"
)
const (
oldDBName = "test"
oldPidColName = "pids"
)
type treeNode struct {
Tgid int
Threads []Process
Children []int
}
func main() {
// 连接到MongoDB
client, err := mongo.Connect(context.TODO(), options.Client().ApplyURI("mongodb://localhost:27017"))
if err != nil {
log.Fatal(err)
}
defer client.Disconnect(context.TODO())
// 选择数据库和集合
db := client.Database(oldDBName)
collection := db.Collection(oldPidColName)
// 提取所有数据
var res []Process
cursor, err := collection.Find(context.Background(), bson.M{})
if err != nil {
fmt.Fprintf(os.Stderr, "Err: %v\n", err)
}
if err := cursor.All(context.Background(), &res); err != nil {
fmt.Fprintf(os.Stderr, "Err All: %v\n", err)
}
var merged sync.Map
for _, process := range res {
tmp, ok := merged.Load(process.Pid)
if ok {
// 证明重复了，要合并
tmp := ProMerge(tmp.(Process), process)
merged.Store(process.Pid, tmp)
} else {
// 没有，直接插入
merged.Store(process.Pid, process)
}
}
var treeMap sync.Map
findTgid := make(map[int]int)
var stared int
merged.Range(func(key, val interface{}) bool {
tmp := val.(Process)
if tmp.Star {
stared = tmp.Tgid
}
// 登记tgid
findTgid[tmp.Pid] = tmp.Tgid
nodeTmp, ok := treeMap.Load(tmp.Tgid)
if ok {
// 直接记录
node := nodeTmp.(treeNode)
node.Threads = append(node.Threads, tmp)
node.Children = append(node.Children, tmp.Children...)
treeMap.Store(tmp.Tgid, node)
} else {
node := treeNode{
Tgid: tmp.Tgid,
Threads: make([]Process, 0),
Children: make([]int, 0),
}
node.Threads = append(node.Threads, tmp)
node.Children = append(node.Children, tmp.Children...)
treeMap.Store(tmp.Tgid, node)
}
return true
})
// 从tgid==stared开始，构建树
var helloTree sync.Map // 在树上的tgid节点
var q Queue // 记录每一个整理好的结构体，bfs
visited := make(map[int]bool)
visited[stared] = true
tmp, ok := treeMap.Load(stared)
if !ok {
return
}
q.Enqueue(tmp)
helloTree.Store(stared, tmp)
for !q.IsEmpty() {
tmp, ok := q.Dequeue()
if !ok {
continue
}
node := tmp.(treeNode)
for i := 0; i < len(node.Children); i++ {
tgid := findTgid[node.Children[i]]
_, exists := visited[tgid]
if !exists {
visited[tgid] = true
tgidNode, ok := treeMap.Load(tgid)
if !ok {
continue
}
helloTree.Store(tgid, tgidNode)
q.Enqueue(tgidNode)
}
}
}
// TODO:
// 1.修改数据结构，使之自身即存储树结构，插入数据库后前端拿出来就能用
// 2.还有其余优化要做，比如线程退出时间与进程推出时间
// count := 0
// helloTree.Range(func(key, val interface{}) bool {
// count++
// fmt.Printf("tgid: %d\n", val.(treeNode).Tgid)
// return true
// })
// fmt.Printf("Star: %d, res: %d\n", stared, count)
// 接下来处理文件
}
func ProMerge(a, b Process) (res Process) {
// 合并过程中会遇到什么问题？
res.Star = false
if a.StartTimestamp.IsZero() {
res.StartTimestamp = b.StartTimestamp
} else if b.StartTimestamp.IsZero() {
res.StartTimestamp = a.StartTimestamp
} else if a.StartTimestamp.Before(b.StartTimestamp) {
res.StartTimestamp = a.StartTimestamp
} else {
res.StartTimestamp = b.StartTimestamp
}
res.Ppid = a.Ppid
if a.ParentTgid == 0 {
res.ParentTgid = b.ParentTgid
} else {
res.ParentTgid = a.ParentTgid
}
res.Pid = a.Pid
if a.Tgid == 0 {
res.Tgid = b.Tgid
} else {
res.Tgid = a.Tgid
}
if len(a.Args) == 0 {
res.Args = b.Args
} else {
res.Args = a.Args
}
if a.Comm == "" {
res.Comm = b.Comm
} else {
res.Comm = a.Comm
}
if a.RootFS == "" {
res.RootFS = b.RootFS
} else {
res.RootFS = a.RootFS
}
if a.Cwd == "" {
res.Cwd = b.Cwd
} else {
res.Cwd = a.Cwd
}
res.Execve = append(a.Execve, b.Execve...)
res.Children = append(a.Children, b.Children...)
var flag bool // 真a假b
if a.ExitTimestamp.IsZero() {
flag = false
} else if b.ExitTimestamp.IsZero() {
flag = true
} else if a.ExitTimestamp.Before(b.ExitTimestamp) {
flag = true
} else {
flag = false
}
if flag {
res.ExitCode = a.ExitCode
res.ExitSignal = a.ExitSignal
res.ExitTimestamp = a.ExitTimestamp
} else {
res.ExitCode = b.ExitCode
res.ExitSignal = b.ExitSignal
res.ExitTimestamp = b.ExitTimestamp
}
return res
}
|
