diff --git a/_xtool/llcppsigfetch/dbg/debug.go b/_xtool/llcppsigfetch/dbg/debug.go
new file mode 100644
index 00000000..5d74bbc2
--- /dev/null
+++ b/_xtool/llcppsigfetch/dbg/debug.go
@@ -0,0 +1,22 @@
+package dbg
+
+type dbgFlags = int
+
+var flags dbgFlags
+
+const (
+	DbgParse   dbgFlags = 1 << iota
+	DbgFlagAll          = DbgParse
+)
+
+func SetDebugParse() {
+	flags |= DbgParse
+}
+
+func GetDebugParse() bool {
+	return flags&DbgParse != 0
+}
+
+func SetDebugAll() {
+	flags = DbgFlagAll
+}
diff --git a/_xtool/llcppsigfetch/llcppsigfetch.go b/_xtool/llcppsigfetch/llcppsigfetch.go
index d6bf6e48..a5b54e57 100644
--- a/_xtool/llcppsigfetch/llcppsigfetch.go
+++ b/_xtool/llcppsigfetch/llcppsigfetch.go
@@ -22,6 +22,7 @@ import (
 	"os"
 	"strings"
 
+	"github.com/goplus/llcppg/_xtool/llcppsigfetch/dbg"
 	"github.com/goplus/llcppg/_xtool/llcppsigfetch/parse"
 	"github.com/goplus/llcppg/_xtool/llcppsymg/args"
 	"github.com/goplus/llcppg/_xtool/llcppsymg/clangutils"
@@ -40,8 +41,11 @@ func main() {
 		printUsage()
 		return
 	}
+	if ags.VerboseSigfetchParse {
+		dbg.SetDebugParse()
+	}
 	if ags.Verbose {
-		parse.SetDebug(parse.DbgFlagAll)
+		dbg.SetDebugAll()
 	}
 	extract := false
 	out := false
diff --git a/_xtool/llcppsigfetch/parse/cvt.go b/_xtool/llcppsigfetch/parse/cvt.go
index 5b4cee9c..a0f314a7 100644
--- a/_xtool/llcppsigfetch/parse/cvt.go
+++ b/_xtool/llcppsigfetch/parse/cvt.go
@@ -7,6 +7,7 @@ import (
 	"strings"
 	"unsafe"
 
+	"github.com/goplus/llcppg/_xtool/llcppsigfetch/dbg"
 	"github.com/goplus/llcppg/_xtool/llcppsymg/clangutils"
 	"github.com/goplus/llcppg/ast"
 	"github.com/goplus/llcppg/token"
@@ -47,7 +48,7 @@ type Config struct {
 }
 
 func NewConverter(config *clangutils.Config) (*Converter, error) {
-	if debugParse {
+	if dbg.GetDebugParse() {
 		fmt.Fprintln(os.Stderr, "NewConverter: config")
 		fmt.Fprintln(os.Stderr, "config.File", config.File)
 		fmt.Fprintln(os.Stderr, "config.Args", config.Args)
@@ -131,12 +132,12 @@ func (ct *Converter) decIndent() {
 }
 
 func (ct *Converter) logf(format string, args ...interface{}) {
-	if debugParse {
+	if dbg.GetDebugParse() {
 		fmt.Fprintf(os.Stderr, ct.logBase()+format, args...)
 	}
 }
 func (ct *Converter) logln(args ...interface{}) {
-	if debugParse {
+	if dbg.GetDebugParse() {
 		if len(args) > 0 {
 			firstArg := fmt.Sprintf("%s%v", ct.logBase(), args[0])
 			fmt.Fprintln(os.Stderr, append([]interface{}{firstArg}, args[1:]...)...)
@@ -501,7 +502,7 @@ func (ct *Converter) ProcessFuncDecl(cursor clang.Cursor) *ast.FuncDecl {
 	defer ct.decIndent()
 	name, kind := getCursorDesc(cursor)
 	mangledName := toStr(cursor.Mangling())
-	ct.logln("ProcessFuncDecl: CursorName:", name, "CursorKind:", kind)
+	ct.logln("ProcessFuncDecl: CursorName:", name, "CursorKind:", kind, "mangledName:", mangledName)
 
 	// function type will only collect return type
 	// ProcessType can't get the field names,will collect in follows
@@ -525,7 +526,16 @@ func (ct *Converter) ProcessFuncDecl(cursor clang.Cursor) *ast.FuncDecl {
 	// For function type references (e.g. `typedef void (fntype)(); fntype foo;`),
 	// params are already processed in ProcessType via CanonicalType
 	if fnType.Kind != clang.TypeElaborated {
-		funcType.Params = ct.ProcessFieldList(cursor)
+		numArgs := cursor.NumArguments()
+		numFields := c.Int(len(funcType.Params.List))
+		for i := c.Int(0); i < numArgs; i++ {
+			arg := cursor.Argument(c.Uint(i))
+			name := clang.GoString(arg.DisplayName())
+			if len(name) > 0 && i < numFields {
+				field := funcType.Params.List[i]
+				field.Names = []*ast.Ident{&ast.Ident{Name: name}}
+			}
+		}
 	}
 
 	// Linux has one less leading underscore than macOS, so remove one leading underscore on macOS
diff --git a/_xtool/llcppsigfetch/parse/parse.go b/_xtool/llcppsigfetch/parse/parse.go
index 0971922b..fe73800b 100644
--- a/_xtool/llcppsigfetch/parse/parse.go
+++ b/_xtool/llcppsigfetch/parse/parse.go
@@ -6,26 +6,12 @@ import (
 	"os"
 	"strings"
 
+	"github.com/goplus/llcppg/_xtool/llcppsigfetch/dbg"
 	"github.com/goplus/llcppg/_xtool/llcppsymg/clangutils"
 	"github.com/goplus/llcppg/types"
 	"github.com/goplus/llgo/c/cjson"
 )
 
-type dbgFlags = int
-
-const (
-	DbgParse   dbgFlags = 1 << iota
-	DbgFlagAll          = DbgParse
-)
-
-var (
-	debugParse bool
-)
-
-func SetDebug(dbgFlags dbgFlags) {
-	debugParse = (dbgFlags & DbgParse) != 0
-}
-
 type Context struct {
 	Files []*FileEntry
 	*ContextConfig
@@ -52,7 +38,7 @@ func (p *Context) Output() *cjson.JSON {
 
 // ProcessFiles processes the given files and adds them to the context
 func (p *Context) ProcessFiles(files []string) error {
-	if debugParse {
+	if dbg.GetDebugParse() {
 		fmt.Fprintln(os.Stderr, "ProcessFiles: files", files, "isCpp", p.Conf.Cplusplus)
 	}
 	for _, file := range files {
@@ -65,12 +51,12 @@ func (p *Context) ProcessFiles(files []string) error {
 
 // parse file and add it to the context,avoid duplicate parsing
 func (p *Context) processFile(path string) error {
-	if debugParse {
+	if dbg.GetDebugParse() {
 		fmt.Fprintln(os.Stderr, "processFile: path", path)
 	}
 	for _, entry := range p.Files {
 		if entry.Path == path {
-			if debugParse {
+			if dbg.GetDebugParse() {
 				fmt.Fprintln(os.Stderr, "processFile: already parsed", path)
 			}
 			return nil
@@ -86,7 +72,7 @@ func (p *Context) processFile(path string) error {
 }
 
 func (p *Context) parseFile(path string) ([]*FileEntry, error) {
-	if debugParse {
+	if dbg.GetDebugParse() {
 		fmt.Fprintln(os.Stderr, "parseFile: path", path)
 	}
 	converter, err := NewConverter(&clangutils.Config{
diff --git a/_xtool/llcppsymg/args/args.go b/_xtool/llcppsymg/args/args.go
index b94263d2..601e5243 100644
--- a/_xtool/llcppsymg/args/args.go
+++ b/_xtool/llcppsymg/args/args.go
@@ -13,6 +13,7 @@ const LLCPPG_PUB = "llcppg.pub"
 type Args struct {
 	Help                 bool
 	Verbose              bool
+	VerboseSigfetchParse bool //-vsp llcppsigfetch parse.go
 	VerboseParseIsMethod bool //-vpim
 	UseStdin             bool
 	CfgFile              string
@@ -34,6 +35,9 @@ func ParseArgs(args []string, defaultCfgFile string, swflags map[string]bool) (*
 			case "-vpim":
 				result.VerboseParseIsMethod = true
 				continue
+			case "-vsp":
+				result.VerboseSigfetchParse = true
+				continue
 			case "-":
 				result.UseStdin = true
 				continue