working commit

vendor/github.com/dylibso/observe-sdk/go/wasm.go

@@ -0,0 +1,42 @@
+package observe
+
+import (
+	"errors"
+	"log"
+
+	"github.com/tetratelabs/wabin/binary"
+	"github.com/tetratelabs/wabin/wasm"
+)
+
+// Parse the names of the functions out of the
+// names custom section in the wasm binary.
+func parseNames(data []byte) (map[uint32]string, error) {
+	features := wasm.CoreFeaturesV2
+	m, err := binary.DecodeModule(data, features)
+	if err != nil {
+		return nil, err
+	}
+
+	if m.NameSection == nil {
+		return nil, errors.New("Name section not found")
+	}
+
+	names := make(map[uint32]string, len(m.NameSection.FunctionNames))
+
+	for _, v := range m.NameSection.FunctionNames {
+		names[v.Index] = v.Name
+	}
+
+	warnOnDylibsoObserve := true
+	for _, item := range m.ImportSection {
+		if item.Module == "dylibso_observe" {
+			if warnOnDylibsoObserve {
+				warnOnDylibsoObserve = false
+				log.Println("Module uses deprecated namespace \"dylibso_observe\"!\n" +
+					"Please consider reinstrumenting with newer wasm-instr or Observe API!")
+			}
+		}
+	}
+
+	return names, nil
+}