[wasm] Experimental: Add support for multiple non-homogeneous tables

src/wasm/wasm-module.h

Index: src/wasm/wasm-module.h
diff --git a/src/wasm/wasm-module.h b/src/wasm/wasm-module.h
index 71156ad1096770bdd2b90a31e22b773d1131de99..f443a03eeb504258629b6249d9d13eeed7e7d58f 100644
--- a/src/wasm/wasm-module.h
+++ b/src/wasm/wasm-module.h
@@ -151,6 +151,9 @@ struct WasmDataSegment {
 
 // Static representation of a wasm indirect call table.
 struct WasmIndirectFunctionTable {
+  bool isDefault;                // true if table should be used as default.
+  FunctionSig* sig;              // signature of the table.
+  uint32_t sig_index;            // index into the signature table.
   uint32_t size;                 // initial table size.
   uint32_t max_size;             // maximum table size.
   std::vector<uint16_t> values;  // function table.
@@ -307,6 +310,10 @@ struct ModuleEnv {
     DCHECK(IsValidImport(index));
     return module->import_table[index].sig;
   }
+  FunctionSig* GetTableSignature(uint32_t index) {
+    DCHECK(IsValidSignature(index));
+    return module->function_tables[index].sig;
+  }
   FunctionSig* GetSignature(uint32_t index) {
     DCHECK(IsValidSignature(index));
     return module->signatures[index];
@@ -396,6 +403,8 @@ Handle<FixedArray> BuildFunctionTable(Isolate* isolate, uint32_t index,
 void PopulateFunctionTable(Handle<FixedArray> table, uint32_t table_size,
                            const std::vector<Handle<Code>>* code_table);
 
+bool isAnyFuncType(FunctionSig* sig);
+
 namespace testing {
 
 // Decode, verify, and run the function labeled "main" in the