fix: enhance wasm function size handling for Go 1.25+

Author: Zxilly

internal/knowninfo/dependencies.go

@@ -119,7 +119,7 @@ func (m *Dependencies) AddFromPclntab(gp *gore.Package, typ entity.PackageType,
 			return f.End - f.Offset
 		}
 
-		return w.GetFunctionSize(f.Offset)
+		return w.GetFunctionSize(f.Offset, m.k.VersionFlag.Meq125)
 	}
 
 	p := entity.NewPackageWithGorePackage(gp, name, typ, pclntab, getCodeSize, isWasm)

internal/knowninfo/knowninfo.go

@@ -12,6 +12,7 @@ import (
 type VersionFlag struct {
 	Leq118 bool
 	Meq120 bool
+	Meq125 bool // Go 1.25+ changed wasm pclntab to store PC_F instead of full PC
 }
 
 type KnownInfo struct {
@@ -35,14 +36,16 @@ type KnownInfo struct {
 }
 
 func (k *KnownInfo) LoadGoreInfo(f *gore.GoFile, isWasm bool) error {
+	slog.Info("Loading version flag")
+	k.VersionFlag = UpdateVersionFlag(f)
+	slog.Info("Loaded version flag")
+
 	err := k.LoadPackages(f, isWasm)
 	if err != nil {
 		return err
 	}
 
-	slog.Info("Loading version flag and meta info...")
-	k.VersionFlag = UpdateVersionFlag(f)
-	slog.Info("Loaded version flag")
+	slog.Info("Loading meta info...")
 	k.PClnTabAddr = f.GetPCLNTableAddr()
 	slog.Info("Loaded meta info")
 
@@ -62,6 +65,7 @@ func UpdateVersionFlag(f *gore.GoFile) VersionFlag {
 	return VersionFlag{
 		Leq118: gore.GoVersionCompare(ver.Name, "go1.18.10") <= 0,
 		Meq120: gore.GoVersionCompare(ver.Name, "go1.20rc1") >= 0,
+		Meq125: gore.GoVersionCompare(ver.Name, "go1.25rc1") >= 0,
 	}
 }
 

internal/wrapper/wasm.go

@@ -23,9 +23,11 @@ var _ RawFileWrapper = (*WasmWrapper)(nil)
 
 const funcValueOffset = 0x1000
 
-func (w *WasmWrapper) GetFunctionSize(idx uint64) uint64 {
-	// get PC_F from PC
-	idx = idx >> 16
+func (w *WasmWrapper) GetFunctionSize(idx uint64, meq125 bool) uint64 {
+	// Go 1.25+ stores PC_F directly in pclntab, older versions store full PC (PC_F << 16)
+	if !meq125 {
+		idx = idx >> 16
+	}
 	idx = idx - funcValueOffset
 
 	return uint64(len(w.module.CodeSection[idx].Body))