1 files changed, 26 insertions, 14 deletions

diff --git a/lib/Object/WasmObjectFile.cpp b/lib/Object/WasmObjectFile.cpp
index fff497ba5564..7f80bf0b83a0 100644
--- a/lib/Object/WasmObjectFile.cpp
+++ b/lib/Object/WasmObjectFile.cpp
@@ -567,20 +567,16 @@ Error WasmObjectFile::parseExportSection(const uint8_t *Ptr, const uint8_t *End)
     Ex.Name = readString(Ptr);
     Ex.Kind = readUint8(Ptr);
     Ex.Index = readVaruint32(Ptr);
+    WasmSymbol::SymbolType ExportType;
+    bool MakeSymbol = false;
     switch (Ex.Kind) {
     case wasm::WASM_EXTERNAL_FUNCTION:
-      SymbolMap.try_emplace(Ex.Name, Symbols.size());
-      Symbols.emplace_back(Ex.Name, WasmSymbol::SymbolType::FUNCTION_EXPORT,
-                           Sections.size(), i);
-      DEBUG(dbgs() << "Adding export: " << Symbols.back()
-                   << " sym index:" << Symbols.size() << "\n");
+      ExportType = WasmSymbol::SymbolType::FUNCTION_EXPORT;
+      MakeSymbol = true;
       break;
     case wasm::WASM_EXTERNAL_GLOBAL:
-      SymbolMap.try_emplace(Ex.Name, Symbols.size());
-      Symbols.emplace_back(Ex.Name, WasmSymbol::SymbolType::GLOBAL_EXPORT,
-                           Sections.size(), i);
-      DEBUG(dbgs() << "Adding export: " << Symbols.back()
-                   << " sym index:" << Symbols.size() << "\n");
+      ExportType = WasmSymbol::SymbolType::GLOBAL_EXPORT;
+      MakeSymbol = true;
       break;
     case wasm::WASM_EXTERNAL_MEMORY:
     case wasm::WASM_EXTERNAL_TABLE:
@@ -589,6 +585,20 @@ Error WasmObjectFile::parseExportSection(const uint8_t *Ptr, const uint8_t *End)
       return make_error<GenericBinaryError>(
           "Unexpected export kind", object_error::parse_failed);
     }
+    if (MakeSymbol) {
+      auto Pair = SymbolMap.try_emplace(Ex.Name, Symbols.size());
+      if (Pair.second) {
+        Symbols.emplace_back(Ex.Name, ExportType,
+                             Sections.size(), i);
+        DEBUG(dbgs() << "Adding export: " << Symbols.back()
+                     << " sym index:" << Symbols.size() << "\n");
+      } else {
+        uint32_t SymIndex = Pair.first->second;
+        Symbols[SymIndex] = WasmSymbol(Ex.Name, ExportType, Sections.size(), i);
+        DEBUG(dbgs() << "Replacing existing symbol:  " << Symbols[SymIndex]
+                     << " sym index:" << SymIndex << "\n");
+      }
+    }
     Exports.push_back(Ex);
   }
   if (Ptr != End)
@@ -665,15 +675,17 @@ Error WasmObjectFile::parseElemSection(const uint8_t *Ptr, const uint8_t *End) {
 }
 
 Error WasmObjectFile::parseDataSection(const uint8_t *Ptr, const uint8_t *End) {
+  const uint8_t *Start = Ptr;
   uint32_t Count = readVaruint32(Ptr);
   DataSegments.reserve(Count);
   while (Count--) {
-    wasm::WasmDataSegment Segment;
-    Segment.Index = readVaruint32(Ptr);
-    if (Error Err = readInitExpr(Segment.Offset, Ptr))
+    WasmSegment Segment;
+    Segment.Data.MemoryIndex = readVaruint32(Ptr);
+    if (Error Err = readInitExpr(Segment.Data.Offset, Ptr))
       return Err;
     uint32_t Size = readVaruint32(Ptr);
-    Segment.Content = ArrayRef<uint8_t>(Ptr, Size);
+    Segment.Data.Content = ArrayRef<uint8_t>(Ptr, Size);
+    Segment.SectionOffset = Ptr - Start;
     Ptr += Size;
     DataSegments.push_back(Segment);
   }