wasm: add a helper to find custom section by name

cmd/wasm-dump/main.go

@@ -184,7 +184,7 @@ func printHeaders(w io.Writer, fname string, m *wasm.Module) {
 			len(sec.Entries),
 		)
 	}
-	for _, sec := range m.Other {
+	for _, sec := range m.Customs {
 		fmt.Fprintf(w, "%9s start=0x%08x end=0x%08x (size=0x%08x) %q\n",
 			sec.ID.String(),
 			sec.Start, sec.End, len(sec.Bytes),
@@ -336,7 +336,7 @@ func printDetails(w io.Writer, fname string, m *wasm.Module) {
 			fmt.Fprintf(w, "%s", hexDump(e.Data, 0))
 		}
 	}
-	for _, sec := range m.Other {
+	for _, sec := range m.Customs {
 		fmt.Fprintf(w, "%v:\n", sec.ID)
 		fmt.Fprintf(w, " - name: %q\n", sec.Name)
 		raw := bytes.NewReader(sec.Bytes[6:])

wasm/module.go

@@ -49,7 +49,7 @@ type Module struct {
 	Elements *SectionElements
 	Code     *SectionCode
 	Data     *SectionData
-	Other    []*SectionCustom
+	Customs  []*SectionCustom
 
 	// The function index space of the module
 	FunctionIndexSpace []Function
@@ -68,8 +68,14 @@ type Module struct {
 	}
 }
 
-func (m *Module) GetSections() []Section {
-	return m.Sections
+// Custom returns a custom section with a specific name, if it exists.
+func (m *Module) Custom(name string) *SectionCustom {
+	for _, s := range m.Customs {
+		if s.Name == name {
+			return s
+		}
+	}
+	return nil
 }
 
 // NewModule creates a new empty module

wasm/section.go

@@ -140,7 +140,7 @@ func (m *Module) readSection(r *readpos.ReadPos) (bool, error) {
 	case SectionIDCustom:
 		logger.Println("section custom")
 		cs := &SectionCustom{}
-		m.Other = append(m.Other, cs)
+		m.Customs = append(m.Customs, cs)
 		sec = cs
 	case SectionIDType:
 		logger.Println("section type")