1 files changed, 5 insertions, 2 deletions
diff --git a/src/wasm-shell.cpp b/src/wasm-shell.cpp
index c37ba79a3..5f9fafd8f 100644
--- a/src/wasm-shell.cpp
+++ b/src/wasm-shell.cpp
@@ -24,13 +24,11 @@ IString ASSERT_RETURN("assert_return"),
 
 struct ShellExternalInterface : ModuleInstance::ExternalInterface {
   char *memory;
-  size_t memorySize;
 
   ShellExternalInterface() : memory(nullptr) {}
 
   void init(Module& wasm) override {
     memory = new char[wasm.memory.initial];
-    memorySize = wasm.memory.initial;
     // apply memory segments
     for (auto segment : wasm.memory.segments) {
       memcpy(memory + segment.offset, segment.data, segment.size);
@@ -104,6 +102,11 @@ struct ShellExternalInterface : ModuleInstance::ExternalInterface {
     }
   }
 
+  void growMemory(size_t oldSize, size_t newSize) override {
+    delete memory;
+    memory = new char[newSize];
+  }
+
   jmp_buf trapState;
 
   void trap() override {