ebpf/ebpftracer/tls.go

package ebpftracer

import (
	"bufio"
	"bytes"
	"debug/buildinfo"
	"debug/elf"
	"errors"
	"fmt"
	"os"
	"regexp"
	"strconv"
	"strings"

	"github.com/cilium/ebpf"
	"github.com/cilium/ebpf/link"
	"github.com/coroot/coroot-node-agent/ebpftracer/tracer"
	"github.com/coroot/coroot-node-agent/proc"
	. "github.com/coroot/coroot-node-agent/utils/modelse"
	klog "github.com/sirupsen/logrus"
	"golang.org/x/arch/arm64/arm64asm"
	"golang.org/x/arch/x86/x86asm"
	"golang.org/x/mod/semver"
)

const (
	minSupportedGoVersion          = "v1.15.0"
	goTlsWriteSymbol               = "crypto/tls.(*Conn).Write"
	goTlsReadSymbol                = "crypto/tls.(*Conn).Read"
	goExecute                      = "runtime.execute"
	goNewproc1                     = "runtime.newproc1"
	goRunqget                      = "runtime.runqget"
	goGoready                      = "runtime.goready"
	goServeHTTP                    = "net/http.serverHandler.ServeHTTP"
	goTransport                    = "net/http.(*Transport).roundTrip"
	goHeaderWriteSubset            = "net/http.Header.writeSubset"
	goGrpcServerHandleStream       = "google.golang.org/grpc.(*Server).handleStream"
	goGrpcHttp2OperateHeader       = "google.golang.org/grpc/internal/transport.(*http2Server).operateHeaders"
	goGrpcServerWritestatus        = "google.golang.org/grpc/internal/transport.(*http2Server).WriteStatus"
	goGrpcClientConnInvoke         = "google.golang.org/grpc.(*ClientConn).Invoke"
	goGrpcClientLoopyHeaderHandler = "google.golang.org/grpc/internal/transport.(*loopyWriter).headerHandler"
	goGrpcHttp2ClientNewStream     = "google.golang.org/grpc/internal/transport.(*http2Client).NewStream"
	goReadContinuedLineSlice       = "net/textproto.(*Reader).readContinuedLineSlice"
	goGocqlSessionExecuteQuery     = "github.com/gocql/gocql.(*Session).executeQuery"
	goGocqlSessionExecuteQueryV2   = "github.com/apache/cassandra-gocql-driver/v2.(*Session).executeQuery"
	goKafkaWriterWriteMessages     = "github.com/segmentio/kafka-go.(*Writer).WriteMessages"
	goKafkaReaderFetchMessage      = "github.com/segmentio/kafka-go.(*Reader).FetchMessage"
	goBuntdbTxSet                  = "github.com/tidwall/buntdb.(*Tx).Set"
	goBuntdbTxGet                  = "github.com/tidwall/buntdb.(*Tx).Get"
	goBuntdbTxDelete               = "github.com/tidwall/buntdb.(*Tx).Delete"
	goLeveldbDBPutRec              = "github.com/syndtr/goleveldb/leveldb.(*DB).putRec"
	goLeveldbDBGet                 = "github.com/syndtr/goleveldb/leveldb.(*DB).Get"
)

var (
	opensslVersionRe = regexp.MustCompile(`OpenSSL\s(\d\.\d+\.\d+)`)
)

func (t *Tracer) AttachOpenSslUprobes(pid uint32) ([]link.Link, error) {
	if t.DisableL7Tracing() {
		return nil, nil
	}
	libPath, version := getSslLibPathAndVersion(pid)
	if libPath == "" || version == "" {
		return nil, nil
	}

	log := func(msg string, err error) {
		if err != nil {
			for _, s := range []string{"no such file or directory", "no such process", "permission denied"} {
				if strings.HasSuffix(err.Error(), s) {
					return
				}
			}
			klog.Errorf("pid=%d libssl_version=%s: %s: %s", pid, version, msg, err)
			return
		}
		klog.Infof("pid=%d libssl_version=%s: %s", pid, version, msg)
	}

	exe, err := link.OpenExecutable(libPath)
	if err != nil {
		log("failed to open executable", err)
		return nil, err
	}
	var links []link.Link
	writeEnter := "openssl_SSL_write_enter"
	readEnter := "openssl_SSL_read_enter"
	readExEnter := "openssl_SSL_read_ex_enter"
	readExit := "openssl_SSL_read_exit"
	switch {
	case semver.Compare(version, "v3.0.0") >= 0:
		writeEnter = "openssl_SSL_write_enter_v3_0"
		readEnter = "openssl_SSL_read_enter_v3_0"
		readExEnter = "openssl_SSL_read_ex_enter_v3_0"
	case semver.Compare(version, "v1.1.1") >= 0:
		writeEnter = "openssl_SSL_write_enter_v1_1_1"
		readEnter = "openssl_SSL_read_enter_v1_1_1"
		readExEnter = "openssl_SSL_read_ex_enter_v1_1_1"
	}

	type prog struct {
		symbol    string
		uprobe    string
		uretprobe string
	}
	progs := []prog{
		{symbol: "SSL_write", uprobe: writeEnter},
		{symbol: "SSL_read", uprobe: readEnter},
		{symbol: "SSL_read", uretprobe: readExit},
	}
	if semver.Compare(version, "v1.1.1") >= 0 {
		progs = append(progs, []prog{
			{symbol: "SSL_write_ex", uprobe: writeEnter},
			{symbol: "SSL_read_ex", uprobe: readExEnter},
			{symbol: "SSL_read_ex", uretprobe: readExit},
		}...)
	}
	for _, p := range progs {
		if p.uprobe != "" {
			l, err := exe.Uprobe(p.symbol, t.uprobes[p.uprobe], nil)
			klog.Infoln("fucktls crypto/tls uprobes attached", p.symbol)
			if err != nil {
				//log("failed to attach uprobe", err)
				klog.Infoln("fucktls crypto/tls uprobes attached error", p.symbol)
				return nil, err
			}
			links = append(links, l)
		}
		if p.uretprobe != "" {
			klog.Infoln("fucktls crypto/tls uprobes attached ret", p.symbol)
			l, err := exe.Uretprobe(p.symbol, t.uprobes[p.uretprobe], nil)
			if err != nil {
				klog.Infoln("fucktls crypto/tls uprobes attached ret error", p.symbol)
				//log("failed to attach uretprobe", err)
				return nil, err
			}
			links = append(links, l)
		}
	}

	//log("libssl uprobes attached", nil)
	return links, nil
}

func (t *Tracer) AttachGoTlsUprobes(pid uint32, appInfo *AppInfo, codeType uint16) ([]link.Link, error) {
	if t.DisableL7Tracing() {
		return nil, nil
	}

	path := proc.Path(pid, "exe")
	instanceID := appInfo.InstanceIdHash.HashtVal
	appID := appInfo.AppIdHash.HashtVal
	var err error
	var name, version string
	var major, minor, revision int

	log := func(msg string, err error) {
		if err != nil {
			for _, s := range []string{"not a Go executable", "no such file or directory", "no such process", "permission denied"} {
				if strings.HasSuffix(err.Error(), s) {
					return
				}
			}
			klog.Errorf("pid=%d golang_app=%s golang_version=%s: %s: %s", pid, name, version, msg, err)
			return
		}
		klog.Infof("pid=%d golang_app=%s golang_version=%s: %s", pid, name, version, msg)
	}

	bi, err := buildinfo.ReadFile(path)
	if err != nil {
		log("failed to read build info", err)
		return nil, err
	}
	// isGolangApp = true

	name, err = os.Readlink(path)
	if err != nil {
		log("failed to read name", err)
		return nil, err
	}
	version = strings.Replace(bi.GoVersion, "go", "v", 1)
	if semver.Compare(version, minSupportedGoVersion) < 0 {
		log(fmt.Sprintf("go_versions below %s are not supported", minSupportedGoVersion), nil)
		return nil, err
	}
	appInfo.Version = version

	ef, err := elf.Open(path)
	if err != nil {
		log("failed to open as elf binary", err)
		return nil, err
	}
	defer ef.Close()

	symbols, err := ef.Symbols()
	if err != nil {
		if errors.Is(err, elf.ErrNoSymbols) {
			log("no symbol section", err)
			return nil, err
		}
		log("failed to read symbols", err)
		return nil, err
	}

	textSection := ef.Section(".text")
	if textSection == nil {
		log("no text section", err)
		return nil, err
	}
	textSectionData, err := textSection.Data()
	if err != nil {
		log("failed to read text section", err)
		return nil, err
	}
	textSectionLen := uint64(len(textSectionData) - 1)

	exe, err := link.OpenExecutable(path)
	if err != nil {
		log("failed to open executable", err)
		return nil, err
	}

	// 检测 gRPC 版本
	var grpcMajorVersion, grpcMinorVersion int
	for _, dep := range bi.Deps {
		if strings.Contains(dep.Path, "grpc") {
			klog.Infoln("Found gRPC dependency:", dep.Path, "version:", dep.Version)

			// 解析版本号
			version := dep.Version
			if version != "" {
				// 移除可能的 "v" 前缀
				version = strings.TrimPrefix(version, "v")
				parts := strings.Split(version, ".")

				if len(parts) >= 2 {
					major, err := strconv.Atoi(parts[0])
					if err != nil {
						klog.WithError(err).Warnf("Error parsing major version from %s", parts[0])
						continue
					}

					minor, err := strconv.Atoi(parts[1])
					if err != nil {
						klog.WithError(err).Warnf("Error parsing minor version from %s", parts[1])
						continue
					}

					klog.Infof("Detected gRPC version: %d.%d for PID %d", major, minor, pid)
					grpcMajorVersion = major
					grpcMinorVersion = minor
					// // 根据版本选择相应的探针策略
					// if major == 1 && minor >= 69 {
					// 	klog.Infof("Using modern gRPC handler for version %d.%d", major, minor)
					// } else {
					// 	klog.Infof("Using legacy gRPC handler for version %d.%d", major, minor)
					// }
				}
			}
		}
	}

	offset, ok := tracer.GetOffset(tracer.NewID("std", "runtime", "g", "goid"), path)
	if ok {
		klog.Infof("[AttachGoTlsUprobes] STEP 11.1: Successfully got goid offset=%d", offset)
	} else {
		klog.Errorf("[AttachGoTlsUprobes] STEP 11.2: Failed to get goid offset, pid=%d, version=%s", pid, bi.GoVersion)
	}

	// 获取 runtime.p.goidcache 偏移量
	klog.Infof("[AttachGoTlsUprobes] STEP 11.3: Getting offset for runtime.p.goidcache")
	goidcacheOffset, okGoidcache := tracer.GetOffset(tracer.NewID("std", "runtime", "p", "goidcache"), path)
	if okGoidcache {
		klog.Infof("[AttachGoTlsUprobes] STEP 11.4: Successfully got goidcache offset=%d", goidcacheOffset)
	} else {
		klog.Warnf("[AttachGoTlsUprobes] STEP 11.5: Failed to get goidcache offset, pid=%d, version=%s, using fallback", pid, bi.GoVersion)
		goidcacheOffset = 384 // fallback value
	}

	// 获取 runtime.p.runnext 偏移量
	klog.Infof("[AttachGoTlsUprobes] STEP 11.6: Getting offset for runtime.p.runnext")
	runnextOffset, okRunnext := tracer.GetOffset(tracer.NewID("std", "runtime", "p", "runnext"), path)
	if okRunnext {
		klog.Infof("[AttachGoTlsUprobes] STEP 11.7: Successfully got runnext offset=%d", runnextOffset)
	} else {
		klog.Warnf("[AttachGoTlsUprobes] STEP 11.8: Failed to get runnext offset, pid=%d, version=%s, using fallback", pid, bi.GoVersion)
		runnextOffset = 2456 // fallback value
	}

	klog.Infof("[AttachGoTlsUprobes] STEP 12: Getting offset for runtime.hmap.buckets")
	bucketsOff, ok2 := tracer.GetOffset(tracer.NewID("std", "runtime", "hmap", "buckets"), path)

	// Go 1.24+ 使用新的 map 实现（Swiss Tables），使用 internal/runtime/maps.Map 而不是 runtime.hmap
	if !ok2 {
		klog.Errorf("[AttachGoTlsUprobes] STEP 12.2: Failed to get buckets offset, pid=%d, version=%s", pid, bi.GoVersion)
		klog.Infof("[AttachGoTlsUprobes] STEP 12.3: Trying Swiss Tables maps.Map.dirPtr for Go 1.24+")

		// Go 1.24+ Swiss Tables 使用 internal/runtime/maps.Map 结构体
		// 结构体字段：used uint64, seed uintptr, dirPtr unsafe.Pointer (相当于旧的 buckets)
		// 尝试获取 maps.Map.dirPtr 的偏移量
		// 注意：DWARF 中的包路径可能是 "internal/runtime/maps" 或 "internal/runtime/maps.Map"
		swissFields := []struct {
			pkg        string
			structName string
			field      string
		}{
			{"internal/runtime/maps", "Map", "dirPtr"},
			{"internal.runtime.maps", "Map", "dirPtr"},
			{"maps", "Map", "dirPtr"},
		}

		for _, sf := range swissFields {
			// 尝试不同的包路径格式
			swissOff, swissOk := tracer.GetOffset(tracer.NewID("std", sf.pkg, sf.structName, sf.field), path)
			if swissOk {
				klog.Infof("[AttachGoTlsUprobes] STEP 12.4: Found Swiss Tables field '%s.%s.%s' with offset=%d", sf.pkg, sf.structName, sf.field, swissOff)
				bucketsOff = swissOff
				ok2 = true
				break
			} else {
				klog.Debugf("[AttachGoTlsUprobes] STEP 12.4: Trying Swiss Tables field '%s.%s.%s' not found", sf.pkg, sf.structName, sf.field)
			}
		}

		// 如果还是找不到，尝试旧的 hmap 字段作为备选
		if !ok2 {
			klog.Infof("[AttachGoTlsUprobes] STEP 12.5: Trying alternative hmap field names")
			alternativeFields := []string{"table", "swiss", "swissTable", "buckets1", "oldbuckets", "bmap", "extra"}
			for _, fieldName := range alternativeFields {
				altOff, altOk := tracer.GetOffset(tracer.NewID("std", "runtime", "hmap", fieldName), path)
				if altOk {
					klog.Infof("[AttachGoTlsUprobes] STEP 12.6: Found alternative field '%s' with offset=%d", fieldName, altOff)
					bucketsOff = altOff
					ok2 = true
					break
				}
			}
		}

		if !ok2 {
			klog.Errorf("[AttachGoTlsUprobes] STEP 12.7: All attempts failed, Go 1.24+ Swiss Tables map structure not found")
			// 根据源码分析，maps.Map 结构体布局（64-bit）：
			// - used uint64 (8 bytes, offset 0)
			// - seed uintptr (8 bytes, offset 8)
			// - dirPtr unsafe.Pointer (8 bytes, offset 16) <- 相当于旧的 buckets
			// 如果 DWARF 查找失败，使用硬编码的偏移量作为 fallback
			// 注意：这需要确认目标系统是 64-bit，且结构体对齐正确
			klog.Warnf("[AttachGoTlsUprobes] STEP 12.8: Using hardcoded offset for maps.Map.dirPtr (offset=16 on 64-bit)")
			klog.Warnf("[AttachGoTlsUprobes] STEP 12.9: This assumes: used(uint64@0) + seed(uintptr@8) + dirPtr(unsafe.Pointer@16)")

			// 检查 Go 版本是否 >= 1.24
			realVersion := strings.Replace(bi.GoVersion, "go", "", 1)
			parts := strings.Split(realVersion, ".")
			if len(parts) >= 2 {
				major, _ = strconv.Atoi(parts[0])
				minor, _ = strconv.Atoi(parts[1])
				if major > 1 || (major == 1 && minor >= 24) {
					// Go 1.24+ 使用 Swiss Tables，maps.Map.dirPtr 在 offset 16 (64-bit)
					// 假设是 64-bit 系统（大多数生产环境）
					bucketsOff = 16
					ok2 = true
					klog.Infof("[AttachGoTlsUprobes] STEP 12.10: Using hardcoded offset=%d for Go %s (Swiss Tables)", bucketsOff, bi.GoVersion)
				} else {
					klog.Errorf("[AttachGoTlsUprobes] STEP 12.11: Go version < 1.24 but buckets not found, this is unexpected")
					bucketsOff = 0
				}
			} else {
				klog.Errorf("[AttachGoTlsUprobes] STEP 12.12: Failed to parse Go version: %s", bi.GoVersion)
				bucketsOff = 0
			}
		}
	} else {
		klog.Infof("[AttachGoTlsUprobes] STEP 12.1: Successfully got buckets offset=%d", bucketsOff)
	}

	klog.Infof("[AttachGoTlsUprobes] STEP 13: Checking if both offsets are valid, goid_ok=%v, buckets_ok=%v", ok, ok2)
	// Go 1.24+ 兼容：如果 goid 成功但 buckets 失败，仍然继续（但记录警告）
	if ok {
		if !ok2 {
			klog.Warnf("[AttachGoTlsUprobes] STEP 13.0: buckets offset missing for Go 1.24+, but continuing with goid only")
			// 对于 Go 1.24，可能需要调整后续逻辑，暂时允许继续
		}
		klog.Infof("[AttachGoTlsUprobes] STEP 13.1: Both offsets valid, proceeding with version encoding")
		klog.Infof("[AttachGoTlsUprobes] STEP 14: Parsing Go version string")
		realVersion := strings.Replace(bi.GoVersion, "go", "", 1)
		klog.Infof("[AttachGoTlsUprobes] STEP 14.1: Real version string=%s", realVersion)
		parts := strings.Split(realVersion, ".")
		if len(parts) >= 2 {
			major, err = strconv.Atoi(parts[0])
			if err != nil {
				log("Error converting major version:", err)
				return nil, err
			}
			minor, err = strconv.Atoi(parts[1])
			if err != nil {
				log("Error converting minor version:", err)
				return nil, err
			}
			if len(parts) >= 3 {
				revision, err = strconv.Atoi(parts[2])
				if err != nil {
					log("Error converting revision version:", err)
				}
			}

			klog.Infof("[AttachGoTlsUprobes]  Parsed version, major=%d, minor=%d, revision=%d", major, minor, revision)
			goVersion := ((major & 0xFF) << 16) + ((minor & 0xFF) << 8) + min(revision, 255)

			klog.Infof("[AttachGoTlsUprobes] Initializing EbpfProcInfo structure")
			info := EbpfProcInfo{}
			info.Version = uint32(goVersion)
			info.Offsets[OFFSET_IDX_GOID_RUNTIME_G] = uint16(offset)
			info.Offsets[OFFSET_IDX_P_GOIDCACHE] = uint16(goidcacheOffset)
			info.Offsets[OFFSET_IDX_P_RUNNEXT] = uint16(runnextOffset)
			info.NetTCPConnItab = uint64(0)
			info.CryptoTLSConnItab = uint64(0)
			info.CredentialsSyscallConnItab = uint64(0)
			info.InstanceId = instanceID
			info.AppId = appID
			info.CodeType = codeType
			if major == 1 && minor >= 24 {
				info.UseSwissMap = uint64(1)
			}
			if grpcMajorVersion >= 1 && grpcMinorVersion >= 60 {
				info.IsNewFramePos = 1
				klog.Infof("[AttachGoTlsUprobes] Using new frame position for gRPC >= 1.60")
			} else {
				info.IsNewFramePos = 0
				klog.Infof("[AttachGoTlsUprobes] Using old frame position for gRPC < 1.60")
			}
			// go
			info.BucketsPtrPos = bucketsOff
			if bucketsOff == 0 {
				klog.Warnf("[AttachGoTlsUprobes] STEP 15.3: BucketsPtrPos=0 (Go 1.24+ may not use buckets field)")
			} else {
				klog.Infof("[AttachGoTlsUprobes] STEP 15.3: Basic info initialized, BucketsPtrPos=%d", bucketsOff)
			}

			klog.Infof("[AttachGoTlsUprobes] STEP 16: Getting offsets for HTTP, gRPC and Kafka fields")
			fields := map[*uint64]tracer.ID{
				&info.MethodPtrPos:        tracer.NewID("std", "net/http", "Request", "Method"),
				&info.UrlPtrPos:           tracer.NewID("std", "net/http", "Request", "URL"),
				&info.PathPtrPos:          tracer.NewID("std", "net/url", "URL", "Path"),
				&info.StatusCodePos:       tracer.NewID("std", "net/http", "response", "status"),
				&info.RequestHostPos:      tracer.NewID("std", "net/http", "Request", "Host"),
				&info.UrlHostPos:          tracer.NewID("std", "net/url", "URL", "Host"),
				&info.ProtoPos:            tracer.NewID("std", "net/http", "Request", "Proto"),
				&info.CtxPtrPos:           tracer.NewID("std", "net/http", "Request", "ctx"),
				&info.HeadersPtrPos:       tracer.NewID("std", "net/http", "Request", "Header"),
				&info.HttpClientNextidPos: tracer.NewID("google.golang.org/grpc", "google.golang.org/grpc/internal/transport", "http2Client", "nextID"),
				&info.StreamMethodPtrPos:  tracer.NewID("google.golang.org/grpc", "google.golang.org/grpc/internal/transport", "Stream", "method"),
				&info.StreamCtxPos:        tracer.NewID("google.golang.org/grpc", "google.golang.org/grpc/internal/transport", "Stream", "ctx"),
				&info.IoWriterBufPtrPos:   tracer.NewID("std", "bufio", "Writer", "buf"),
				&info.IoWriterNPos:        tracer.NewID("std", "bufio", "Writer", "n"),
				// Kafka Message fields
				&info.KafkaMessageKeyPos:       tracer.NewID("github.com/segmentio/kafka-go", "github.com/segmentio/kafka-go", "Message", "Key"),
				&info.KafkaMessageTopicPos:     tracer.NewID("github.com/segmentio/kafka-go", "github.com/segmentio/kafka-go", "Message", "Topic"),
				&info.KafkaMessageHeadersPos:   tracer.NewID("github.com/segmentio/kafka-go", "github.com/segmentio/kafka-go", "Message", "Headers"),
				&info.KafkaMessageTimePos:      tracer.NewID("github.com/segmentio/kafka-go", "github.com/segmentio/kafka-go", "Message", "Time"),
				&info.KafkaMessagePartitionPos: tracer.NewID("github.com/segmentio/kafka-go", "github.com/segmentio/kafka-go", "Message", "Partition"),
				&info.KafkaMessageOffsetPos:    tracer.NewID("github.com/segmentio/kafka-go", "github.com/segmentio/kafka-go", "Message", "Offset"),
				&info.KafkaMessageValuePos:     tracer.NewID("github.com/segmentio/kafka-go", "github.com/segmentio/kafka-go", "Message", "Value"),
				// Kafka Writer fields
				&info.KafkaWriterTopicPos: tracer.NewID("github.com/segmentio/kafka-go", "github.com/segmentio/kafka-go", "Writer", "Topic"),
				// Try both Brokers and Addr fields - Addr is a string, Brokers is []string
				&info.KafkaWriterAddrPos: tracer.NewID("github.com/segmentio/kafka-go", "github.com/segmentio/kafka-go", "Writer", "Addr"),
				// Kafka Reader fields
				// Note: Reader.config is unexported, try both "config" and "Config"
				&info.KafkaReaderConfigPos:        tracer.NewID("github.com/segmentio/kafka-go", "github.com/segmentio/kafka-go", "Reader", "config"),
				&info.KafkaReaderConfigGroupIDPos: tracer.NewID("github.com/segmentio/kafka-go", "github.com/segmentio/kafka-go", "ReaderConfig", "GroupID"),
				&info.KafkaReaderConfigTopicsPos:  tracer.NewID("github.com/segmentio/kafka-go", "github.com/segmentio/kafka-go", "ReaderConfig", "topics"),
				// net.TCPAddr offsets (standard library)
				&info.TcpAddrIPOffset:   tracer.NewID("std", "net", "TCPAddr", "IP"),
				&info.TcpAddrPortOffset: tracer.NewID("std", "net", "TCPAddr", "Port"),
			}

			successCount := 0
			failCount := 0
			for field, id := range fields {
				off, ok := tracer.GetOffset(id, path)
				if !ok {
					klog.Warnf("[AttachGoTlsUprobes] STEP 16.1: Failed to get offset for ID: %v (PkgPath=%s, Struct=%s, Field=%s)", id, id.PkgPath, id.Struct, id.Field)
					failCount++
				} else {
					successCount++
					klog.Debugf("[AttachGoTlsUprobes] STEP 16.2: Got offset for %s.%s.%s = %d", id.PkgPath, id.Struct, id.Field, off)
				}
				*field = off
			}
			klog.Infof("[AttachGoTlsUprobes]  Field offset collection completed, success=%d, failed=%d", successCount, failCount)

			// 获取内存地址
			if appInfo.GoProcCache.StartAddr == 0 && appInfo.GoProcCache.EndAddr == 0 {
				klog.Infof("[AttachGoTlsUprobes] Cache empty, calling Allocate")
				allocDetails, allocErr := tracer.Allocate(int(pid))
				if allocErr != nil {
					return nil, allocErr
				}
				if allocDetails != nil {
					appInfo.GoProcCache.StartAddr = allocDetails.StartAddr
					appInfo.GoProcCache.EndAddr = allocDetails.EndAddr
					klog.Infof("[AttachGoTlsUprobes] Allocate succeeded, StartAddr=0x%x, EndAddr=0x%x", allocDetails.StartAddr, allocDetails.EndAddr)
				} else {
					klog.Warnf("[AttachGoTlsUprobes] Allocate returned nil")
				}
			} else {
				klog.Infof("[AttachGoTlsUprobes] Using cached addresses, StartAddr=0x%x, EndAddr=0x%x", appInfo.GoProcCache.StartAddr, appInfo.GoProcCache.EndAddr)
			}
			info.StartAddr = appInfo.GoProcCache.StartAddr
			info.EndAddr = appInfo.GoProcCache.EndAddr
			klog.Debugln("Major:", major)
			klog.Debugln("Minor:", minor)
			klog.Debugln("Revision:", revision)
			klog.Debugln("goVersion", goVersion)
			klog.WithField("pid", pid).Debugln("info.StartAddr", info.StartAddr)
			klog.WithField("pid", pid).Debugln("info.EndAddr", info.EndAddr)

			// 构建 sysvc 值：{app_name_len}:app_name:{appServiceType_len}:appServiceType:{SysTagLen}[:SysTag]
			// appServiceType 固定为 "APPLICATION"
			appName := appInfo.AppName
			nodeInfo := NODE_INFO.GetNodeInfo()
			sysTag := ""
			if nodeInfo != nil {
				sysTag = nodeInfo.SysTag
			}
			appServiceType := "APPLICATION"

			appNameLen := len(appName)
			appServiceTypeLen := len(appServiceType)
			sysTagLen := len(sysTag)

			// 限制长度，避免超出数组大小
			if appNameLen > 32 {
				appNameLen = 32
				appName = appName[:32]
			}
			if sysTagLen > 32 {
				sysTagLen = 32
				sysTag = sysTag[:32]
			}

			// 格式：{app_name_len}:app_name:{appServiceType_len}:appServiceType[:{SysTagLen}:SysTag]
			// 如果 sysTag 为空，则为 {app_name_len}:app_name:{appServiceType_len}:appServiceType
			// 如果 sysTag 不为空，则为 {app_name_len}:app_name:{appServiceType_len}:appServiceType:{SysTagLen}:SysTag
			// 长度不足2位时前面补0，例如：08:service:12:APPLICATION 或 08:service:12:APPLICATION:03:tag
			var sysvcStr string
			if sysTagLen == 0 {
				sysvcStr = fmt.Sprintf("%02d:%s:%02d:%s", appNameLen, appName, appServiceTypeLen, appServiceType)
			} else {
				sysvcStr = fmt.Sprintf("%02d:%s:%02d:%s:%02d:%s", appNameLen, appName, appServiceTypeLen, appServiceType, sysTagLen, sysTag)
			}

			// 复制到字节数组，确保不超过 76 字节
			sysvcBytes := []byte(sysvcStr)
			if len(sysvcBytes) > 76 {
				sysvcBytes = sysvcBytes[:76]
			}
			copy(info.Sysvc[:], sysvcBytes)
			klog.Debugf("[AttachGoTlsUprobes] Sysvc constructed: %s", sysvcStr)

			klog.Infof("[AttachGoTlsUprobes] Updating proc_info map")
			_, err = tracer.UpdateProcInfoToMap(t.collection, pid, info)
			if err != nil {
				klog.Error("failed to update program info", err)
				return nil, err
			}
			klog.Infof("[AttachGoTlsUprobes] Proc_info map updated successfully")
			appInfo.EBPFProcInfo = &info
		} else {
			klog.Errorf("[AttachGoTlsUprobes] Skipping proc_info initialization due to missing offsets, goid_ok=%v, buckets_ok=%v", ok, ok2)
			if !ok {
				klog.Errorf("[AttachGoTlsUprobes] runtime.g.goid offset missing - this is critical!")
			}
			if !ok2 {
				klog.Errorf("[AttachGoTlsUprobes] runtime.hmap.buckets offset missing - Go 1.24+ may use new map implementation")
			}
		}
	}

	klog.Infof("[AttachGoTlsUprobes] Starting symbol matching and uprobe attachment, total symbols=%d", len(symbols))
	var links []link.Link
	matchedSymbols := 0
	for i, s := range symbols {
		if elf.ST_TYPE(s.Info) != elf.STT_FUNC || s.Size == 0 {
			continue
		}
		switch s.Name {
		case goTlsWriteSymbol, goTlsReadSymbol:
			matchedSymbols++
			klog.Infof("[AttachGoTlsUprobes] STEP 19.1: Matched TLS symbol: %s (index=%d)", s.Name, i)
		case goExecute:
			matchedSymbols++
			klog.Infof("[AttachGoTlsUprobes] STEP 19.2: Matched runtime.execute symbol (index=%d)", i)
		case goNewproc1:
			matchedSymbols++
			klog.Infof("[AttachGoTlsUprobes] STEP 19.3: Matched runtime.newproc1 symbol (index=%d)", i)
		case goRunqget:
			matchedSymbols++
			klog.Infof("[AttachGoTlsUprobes] STEP 19.4: Matched runtime.runqget symbol (index=%d)", i)
		case goServeHTTP:
			matchedSymbols++
			klog.Infof("[AttachGoTlsUprobes] STEP 19.6: Matched net/http.serverHandler.ServeHTTP symbol (index=%d)", i)
		case goTransport, goHeaderWriteSubset:
			matchedSymbols++
			klog.Infof("[AttachGoTlsUprobes] STEP 19.7: Matched net/http.Transport.roundTrip writeSubset symbol (index=%d)", i)
		case goGrpcClientConnInvoke:
			matchedSymbols++
			klog.Infof("[AttachGoTlsUprobes] STEP 19.8: Matched gRPC ClientConn.Invoke symbol (index=%d)", i)
		case goGrpcHttp2OperateHeader, goGrpcServerHandleStream, goGrpcServerWritestatus, goGrpcClientLoopyHeaderHandler, goGrpcHttp2ClientNewStream:
			matchedSymbols++
			klog.Infof("[AttachGoTlsUprobes] STEP 19.9: Matched gRPC symbol: %s (index=%d)", s.Name, i)
		case goGocqlSessionExecuteQuery:
			matchedSymbols++
			klog.Infof("[AttachGoTlsUprobes] STEP 19.10: Matched gocql Session.executeQuery symbol (index=%d)", i)
		case goGocqlSessionExecuteQueryV2:
			matchedSymbols++
			klog.Infof("[AttachGoTlsUprobes] STEP 19.11: Matched cassandra Session.executeQuery symbol (index=%d)", i)
		case goKafkaWriterWriteMessages:
			matchedSymbols++
			klog.Infof("[AttachGoTlsUprobes] STEP 19.13: Matched kafka Writer.WriteMessages symbol (index=%d)", i)
		case goKafkaReaderFetchMessage:
			matchedSymbols++
			klog.Infof("[AttachGoTlsUprobes] STEP 19.14: Matched kafka Reader.FetchMessage symbol (index=%d)", i)
		case goBuntdbTxSet:
			matchedSymbols++
			klog.Infof("[AttachGoTlsUprobes] STEP 19.17: Matched buntdb Tx.Set symbol (index=%d)", i)
		case goBuntdbTxGet:
			matchedSymbols++
			klog.Infof("[AttachGoTlsUprobes] STEP 19.18: Matched buntdb Tx.Get symbol (index=%d)", i)
		case goBuntdbTxDelete:
			matchedSymbols++
			klog.Infof("[AttachGoTlsUprobes] STEP 19.19: Matched buntdb Tx.Delete symbol (index=%d)", i)
		case goLeveldbDBPutRec:
			// putRec 是 Put 和 Delete 的底层方法，通过 keyType 参数区分操作类型
			matchedSymbols++
			klog.Infof("[AttachGoTlsUprobes] STEP 19.20: Matched leveldb DB.putRec symbol (index=%d)", i)
		case goLeveldbDBGet:
			matchedSymbols++
			klog.Infof("[AttachGoTlsUprobes] STEP 19.21: Matched leveldb DB.Get symbol (index=%d)", i)
		case goReadContinuedLineSlice:
		default:
			continue
		}
		klog.Debugf("[AttachGoTlsUprobes] Processing symbol %s, Value=0x%x, Size=%d", s.Name, s.Value, s.Size)
		address := s.Value
		for _, p := range ef.Progs {
			if p.Type != elf.PT_LOAD || (p.Flags&elf.PF_X) == 0 {
				continue
			}

			if p.Vaddr <= s.Value && s.Value < (p.Vaddr+p.Memsz) {
				address = s.Value - p.Vaddr + p.Off
				break
			}
		}
		//fmt.Println("s.Name-----:", s.Name)

		switch s.Name {
		case goExecute:
			klog.Infof("[AttachGoTlsUprobes] STEP 20: Attaching uprobe for runtime.execute, address=0x%x", address)
			l, err := attachUprobe(exe, s.Name, "runtime_execute", t.uprobes, address, "failed to attach write_enter uprobe", true)
			if err != nil {
				klog.Infoln("runtime.execute no")
				return nil, err
			}
			klog.Infof("[AttachGoTlsUprobes] STEP 20.2: Successfully attached runtime.execute uprobe")
			klog.Infoln("runtime.execute ok")
			links = append(links, l)

		case goNewproc1:
			klog.Infof("[AttachGoTlsUprobes] STEP 21: Attaching uprobe for runtime.newproc1, address=0x%x", address)
			retLinks, err := attachUprobeWithReturns(exe, s.Name, "enter_runtime_newproc1", "exit_runtime_newproc1", t.uprobes, address, s, textSection, textSectionLen, textSectionData, ef.Machine, "failed to attach newproc1 uprobe", true)
			if err != nil {
				log("failed to attach newproc1 uprobe", err)
				return nil, err
			}
			links = append(links, retLinks...)
			klog.Infof("[AttachGoTlsUprobes] STEP 21.2: Successfully attached enter_runtime_newproc1 uprobe")

		case goRunqget:
			l, err := attachUprobe(exe, s.Name, "enter_runtime_runqget", t.uprobes, address, "failed to attach goRunqget uprobe", true)
			if err != nil {
				log("failed to attach goRunqget uprobe", err)
				return nil, err
			}
			links = append(links, l)

		//case goGoready:
		//klog.Infof("[AttachGoTlsUprobes] STEP 22: Attaching uprobe for runtime.goready, address=0x%x", address)
		//l, err := attachUprobe(exe, s.Name, "runtime_goready", t.uprobes, address, "failed to attach runtime.goready uprobe", true)
		//if err != nil {
		//	klog.Infoln("runtime.goready no")
		//	return nil, err
		//}
		//klog.Infof("[AttachGoTlsUprobes] STEP 22.2: Successfully attached runtime.goready uprobe")
		//klog.Infoln("runtime.goready ok")
		//links = append(links, l)
		case goGrpcClientConnInvoke:
			retLinks, err := attachUprobeWithReturns(exe, s.Name, "uprobe_ClientConn_Invoke", "uprobe_ClientConn_Invoke_Returns", t.uprobes, address, s, textSection, textSectionLen, textSectionData, ef.Machine, "failed to attach uprobe_ClientConn_Invoke uprobe", true)
			if err != nil {
				return nil, err
			}
			if retLinks != nil {
				klog.Infoln("uprobe_ClientConn_Invoke ok")
				links = append(links, retLinks...)
			}
		case goGrpcClientLoopyHeaderHandler:
			l, err := attachUprobe(exe, s.Name, "uprobe_LoopyWriter_HeaderHandler", t.uprobes, address, "failed to attach uprobe_LoopyWriter_HeaderHandler uprobe", false)
			if err == nil && l != nil {
				klog.Infoln("uprobe_LoopyWriter_HeaderHandler ok")
				links = append(links, l)
			}
		case goGrpcHttp2ClientNewStream:
			l, err := attachUprobe(exe, s.Name, "uprobe_http2Client_NewStream", t.uprobes, address, "failed to attach uprobe_http2Client_NewStream uprobe", false)
			if err == nil && l != nil {
				klog.Infoln("uprobe_http2Client_NewStream ok")
				links = append(links, l)
			}
		case goGrpcHttp2OperateHeader:
			l, err := attachUprobe(exe, s.Name, "uprobe_http2Server_operateHeader", t.uprobes, address, "failed to attach uprobe_http2Server_operateHeader uprobe", false)
			if err == nil && l != nil {
				klog.Infoln("uprobe_http2Server_operateHeader ok")
				links = append(links, l)
			}
		// case goGrpcServerWritestatus:
		// 	// 根据 gRPC 版本选择相应的 WriteStatus 探针
		// 	l, err := exe.Uprobe(s.Name, t.uprobes["uprobe_http2Server_WriteStatus"], &link.UprobeOptions{Address: address})
		// 	if err != nil {
		// 		klog.WithError(err).Errorf("failed to attach uprobe_http2Server_WriteStatus uprobe")
		// 		continue
		// 	}
		// 	links = append(links, l)
		case goGrpcServerHandleStream:
			// 根据 gRPC 版本选择相应的探针
			probeName := t.selectGRPCServerProbe(grpcMajorVersion, grpcMinorVersion)
			retLinks, err := attachUprobeWithReturns(exe, s.Name, probeName, "uprobe_server_handleStream_Returns", t.uprobes, address, s, textSection, textSectionLen, textSectionData, ef.Machine, fmt.Sprintf("failed to attach %s uprobe", probeName), true)
			if err != nil {
				return nil, err
			}
			if retLinks != nil {
				klog.Infof("%s ok (gRPC v%d.%d)", probeName, grpcMajorVersion, grpcMinorVersion)
				klog.Infoln("google.golang.org/grpc.(*Server).handleStream ok----")
				links = append(links, retLinks...)
			}
		case goServeHTTP:
			retLinks, err := attachUprobeWithReturns(exe, s.Name, "uprobe_HandlerFunc_ServeHTTP", "uprobe_HandlerFunc_ServeHTTP_Returns", t.uprobes, address, s, textSection, textSectionLen, textSectionData, ef.Machine, "failed to attach uprobe_HandlerFunc_ServeHTTP uprobe", true)
			if err != nil {
				return nil, err
			}
			if retLinks != nil {
				klog.Infoln("net/http.serverHandler.ServeHTTP ok")
				links = append(links, retLinks...)
			}

		case goTransport:
			if t.DisableE2ETracing() {
				continue
			}
			retLinks, err := attachUprobeWithReturns(exe, s.Name, "uprobe_Transport_roundTrip", "uprobe_Transport_roundTrip_Returns", t.uprobes, address, s, textSection, textSectionLen, textSectionData, ef.Machine, "failed to attach write_enter uprobe", true)
			if err != nil {
				return nil, err
			}
			if retLinks != nil {
				klog.Infoln("net/http.uprobe_Transport_roundTrip ok")
				links = append(links, retLinks...)
			}

		case goHeaderWriteSubset:
			if t.DisableE2ETracing() {
				continue
			}
			l, err := attachUprobe(exe, s.Name, "uprobe_writeSubset", t.uprobes, address, "failed to attach write_enter uprobe", true)
			if err != nil {
				klog.WithError(err).Errorln("failed to attach uprobe_writeSubset")
				return nil, err
			}
			klog.Infoln("net/http.Header.writeSubset ok")
			links = append(links, l)

		case goTlsWriteSymbol:
			klog.Infoln("fucktls goTlsWriteSymbol crypto/tls uprobes attached")
			l, err := attachUprobe(exe, s.Name, "go_crypto_tls_write_enter", t.uprobes, address, "failed to attach write_enter uprobe", true)
			if err != nil {
				klog.WithError(err).Errorln("failed to attach write_enter uprobe")
				return nil, err
			}
			links = append(links, l)

		case goTlsReadSymbol:
			klog.Infoln("fucktls goTlsReadSymbol crypto/tls uprobes attached")
			retLinks, err := attachUprobeWithReturns(exe, s.Name, "go_crypto_tls_read_enter", "go_crypto_tls_read_exit", t.uprobes, address, s, textSection, textSectionLen, textSectionData, ef.Machine, "failed to attach read_enter uprobe", true)
			if err != nil {
				klog.WithError(err).Errorln("failed to attach read_enter uprobe")
				return nil, err
			}
			if retLinks != nil {
				links = append(links, retLinks...)
			}
		case goReadContinuedLineSlice:
			//if major == 1 && minor >= 24 {
			retLinks, err := attachUprobeWithReturns(exe, s.Name, "", "uprobe_textproto_Reader_readContinuedLineSlice_Returns", t.uprobes, address, s, textSection, textSectionLen, textSectionData, ef.Machine, "failed to attach read_exit uprobe", true)
			if err != nil {
				return nil, err
			}
			if retLinks != nil {
				links = append(links, retLinks...)
			}
			//}
		case goGocqlSessionExecuteQuery:
			retLinks, err := attachUprobeWithReturns(exe, s.Name, "uprobe_Session_executeQuery", "uprobe_Session_executeQuery_Returns", t.uprobes, address, s, textSection, textSectionLen, textSectionData, ef.Machine, "failed to attach uprobe_Session_executeQuery uprobe", true)
			if err != nil {
				return nil, err
			}
			if retLinks != nil {
				klog.Infoln("uprobe_Session_executeQuery ok")
				links = append(links, retLinks...)
			}
		case goGocqlSessionExecuteQueryV2:
			retLinks, err := attachUprobeWithReturns(exe, s.Name, "uprobe_Session_executeQuery_cassandra", "uprobe_Session_executeQuery_cassandra_Returns", t.uprobes, address, s, textSection, textSectionLen, textSectionData, ef.Machine, "failed to attach uprobe_Session_executeQuery_cassandra uprobe", true)
			if err != nil {
				return nil, err
			}
			if retLinks != nil {
				klog.Infoln("uprobe_Session_executeQuery_cassandra ok")
				links = append(links, retLinks...)
			}
		case goKafkaWriterWriteMessages:
			retLinks, err := attachUprobeWithReturns(exe, s.Name, "uprobe_WriteMessages", "uprobe_WriteMessages_Returns", t.uprobes, address, s, textSection, textSectionLen, textSectionData, ef.Machine, "failed to attach uprobe_WriteMessages uprobe", true)
			if err != nil {
				return nil, err
			}
			if retLinks != nil {
				klog.Infoln("uprobe_WriteMessages ok")
				links = append(links, retLinks...)
			}
		case goKafkaReaderFetchMessage:
			retLinks, err := attachUprobeWithReturns(exe, s.Name, "uprobe_FetchMessage", "uprobe_FetchMessage_Returns", t.uprobes, address, s, textSection, textSectionLen, textSectionData, ef.Machine, "failed to attach uprobe_FetchMessage uprobe", true)
			if err != nil {
				return nil, err
			}
			if retLinks != nil {
				klog.Infoln("uprobe_FetchMessage ok")
				links = append(links, retLinks...)
			}
		case goBuntdbTxSet:
			// Tx.Set 需要入口和返回探针，每个操作生成独立的 span
			retLinks, err := attachUprobeWithReturns(exe, s.Name, "uprobe_Tx_Set", "uprobe_Tx_Set_Returns", t.uprobes, address, s, textSection, textSectionLen, textSectionData, ef.Machine, "failed to attach uprobe_Tx_Set uprobe", true)
			if err != nil {
				return nil, err
			}
			if retLinks != nil {
				klog.Infoln("uprobe_Tx_Set ok")
				links = append(links, retLinks...)
			}
		case goBuntdbTxGet:
			// Tx.Get 需要入口和返回探针，每个操作生成独立的 span
			retLinks, err := attachUprobeWithReturns(exe, s.Name, "uprobe_Tx_Get", "uprobe_Tx_Get_Returns", t.uprobes, address, s, textSection, textSectionLen, textSectionData, ef.Machine, "failed to attach uprobe_Tx_Get uprobe", true)
			if err != nil {
				return nil, err
			}
			if retLinks != nil {
				klog.Infoln("uprobe_Tx_Get ok")
				links = append(links, retLinks...)
			}
		case goBuntdbTxDelete:
			// Tx.Delete 需要入口和返回探针，每个操作生成独立的 span
			retLinks, err := attachUprobeWithReturns(exe, s.Name, "uprobe_Tx_Delete", "uprobe_Tx_Delete_Returns", t.uprobes, address, s, textSection, textSectionLen, textSectionData, ef.Machine, "failed to attach uprobe_Tx_Delete uprobe", true)
			if err != nil {
				return nil, err
			}
			if retLinks != nil {
				klog.Infoln("uprobe_Tx_Delete ok")
				links = append(links, retLinks...)
			}
		case goLeveldbDBPutRec:
			// DB.putRec 是 Put 和 Delete 的底层方法，需要入口和返回探针
			// 通过 keyType 参数（第一个参数）区分是 Put 还是 Delete 操作
			retLinks, err := attachUprobeWithReturns(exe, s.Name, "uprobe_DB_putRec", "uprobe_DB_putRec_Returns", t.uprobes, address, s, textSection, textSectionLen, textSectionData, ef.Machine, "failed to attach uprobe_DB_putRec uprobe", true)
			if err != nil {
				return nil, err
			}
			if retLinks != nil {
				klog.Infoln("uprobe_DB_putRec ok")
				links = append(links, retLinks...)
			}
		case goLeveldbDBGet:
			// DB.Get 需要入口和返回探针，每个操作生成独立的 span
			retLinks, err := attachUprobeWithReturns(exe, s.Name, "uprobe_DB_Get", "uprobe_DB_Get_Returns", t.uprobes, address, s, textSection, textSectionLen, textSectionData, ef.Machine, "failed to attach uprobe_DB_Get uprobe", true)
			if err != nil {
				return nil, err
			}
			if retLinks != nil {
				klog.Infoln("uprobe_DB_Get ok")
				links = append(links, retLinks...)
			}
		}
	}
	klog.Infof("[AttachGoTlsUprobes] Symbol processing completed, matched symbols=%d, total links=%d", matchedSymbols, len(links))
	if len(links) == 0 {
		klog.Errorf("[AttachGoTlsUprobes] No uprobes attached, returning error")
		return nil, err
	}
	klog.Infof("[AttachGoTlsUprobes] Function completed successfully, attached %d uprobes", len(links))
	klog.Infoln("crypto/tls uprobes attached")
	return links, nil
}

func getSslLibPathAndVersion(pid uint32) (string, string) {
	f, err := os.Open(proc.Path(pid, "maps"))
	if err != nil {
		return "", ""
	}
	defer f.Close()
	scanner := bufio.NewScanner(f)
	scanner.Split(bufio.ScanLines)
	var libsslPath, libcryptoPath string
	for scanner.Scan() {
		parts := strings.Fields(scanner.Text())
		if len(parts) <= 5 {
			continue
		}
		libPath := parts[5]
		switch {
		case libsslPath == "" && strings.Contains(libPath, "libssl.so"):
			fullPath := proc.Path(pid, "root", libPath)
			if _, err = os.Stat(fullPath); err == nil {
				libsslPath = fullPath
			}
		case libcryptoPath == "" && strings.Contains(libPath, "libcrypto.so"):
			fullPath := proc.Path(pid, "root", libPath)
			if _, err = os.Stat(fullPath); err == nil {
				libcryptoPath = fullPath
			}
		default:
			continue
		}
		if libsslPath != "" && libcryptoPath != "" {
			break
		}
	}
	if libsslPath == "" || libcryptoPath == "" {
		return "", ""
	}

	ef, err := elf.Open(libcryptoPath)
	if err != nil {
		return "", ""
	}
	defer ef.Close()
	rodataSection := ef.Section(".rodata")
	if rodataSection == nil {
		return "", ""
	}
	rodataSectionData, err := rodataSection.Data()
	if err != nil {
		return "", ""
	}
	var version string
	for _, b := range bytes.Split(rodataSectionData, []byte("\x00")) {
		if len(b) == 0 {
			continue
		}
		s := string(b)
		if !strings.HasPrefix(s, "OpenSSL") {
			continue
		}
		if m := opensslVersionRe.FindStringSubmatch(s); len(m) > 1 {
			version = m[1]
		}
	}
	return libsslPath, "v" + version
}

// selectGRPCServerProbe 根据 gRPC 版本选择服务端探针
func (t *Tracer) selectGRPCServerProbe(major, minor int) string {
	// 根据 gRPC 版本选择相应的探针
	if major == 1 && minor >= 69 {
		// 现代版本 (>= 1.69.0) 使用新的探针
		klog.Infof("Selecting modern gRPC server probe for version %d.%d", major, minor)
		return "uprobe_server_handleStream2"
	} else {
		// 传统版本 (< 1.69.0) 使用旧的探针
		klog.Infof("Selecting legacy gRPC server probe for version %d.%d", major, minor)
		return "uprobe_server_handleStream"
	}
}

// attachUprobe 附加单个 uprobe，处理错误
func attachUprobe(exe *link.Executable, symbolName string, probeName string, uprobes map[string]*ebpf.Program, address uint64, onError string, returnOnError bool) (link.Link, error) {
	l, err := exe.Uprobe(symbolName, uprobes[probeName], &link.UprobeOptions{Address: address})
	if err != nil {
		if returnOnError {
			klog.WithError(err).Errorf("failed to attach %s uprobe: %s", probeName, onError)
			return nil, err
		} else {
			klog.WithError(err).Errorf("failed to attach %s uprobe: %s", probeName, onError)
			return nil, nil
		}
	}
	return l, nil
}

// attachUprobeWithReturns 附加 uprobe 并附加返回探针
// enterProbeName 为空字符串时，只附加返回探针
func attachUprobeWithReturns(exe *link.Executable, symbolName string, enterProbeName, returnProbeName string, uprobes map[string]*ebpf.Program, address uint64, s elf.Symbol, textSection *elf.Section, textSectionLen uint64, textSectionData []byte, machine elf.Machine, onError string, returnOnError bool) ([]link.Link, error) {
	var links []link.Link

	// 附加入口探针（如果提供了入口探针名称）
	if enterProbeName != "" {
		l, err := attachUprobe(exe, symbolName, enterProbeName, uprobes, address, onError, returnOnError)
		if err != nil {
			return nil, err
		}
		if l == nil {
			return nil, nil
		}
		links = append(links, l)
	}

	// 计算符号在 text section 中的位置
	sStart := s.Value - textSection.Addr
	sEnd := sStart + s.Size
	if sEnd > textSectionLen {
		return links, nil
	}

	// 读取符号字节码
	sBytes := textSectionData[sStart:sEnd]
	returnOffsets := getReturnOffsets(machine, sBytes)
	if len(returnOffsets) == 0 {
		if returnOnError {
			err := fmt.Errorf("failed to attach %s: no return offsets found", returnProbeName)
			klog.Errorln(err)
			return nil, err
		}
		return links, nil
	}

	// 为每个返回点附加探针
	for _, offset := range returnOffsets {
		l, err := exe.Uprobe(symbolName, uprobes[returnProbeName], &link.UprobeOptions{Address: address, Offset: uint64(offset)})
		if err != nil {
			if returnOnError {
				klog.WithError(err).Errorf("failed to attach %s uprobe", returnProbeName)
				return nil, err
			}
			continue
		}
		links = append(links, l)
	}

	return links, nil
}

func getReturnOffsets(machine elf.Machine, instructions []byte) []int {
	var res []int
	switch machine {
	case elf.EM_X86_64:
		for i := 0; i < len(instructions); {
			ins, err := x86asm.Decode(instructions[i:], 64)
			if err == nil && ins.Op == x86asm.RET {
				res = append(res, i)
			}
			i += ins.Len
		}
	case elf.EM_AARCH64:
		for i := 0; i < len(instructions); {
			ins, err := arm64asm.Decode(instructions[i:])
			if err == nil && ins.Op == arm64asm.RET {
				res = append(res, i)
			}
			i += 4
		}
	}
	return res
}

func min(a, b int) int {
	if a < b {
		return a
	}
	return b
}