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

src/wasm/wasm-module.h

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_WASM_MODULE_H_
 #define V8_WASM_MODULE_H_
 
 #include <memory>
 
 #include "src/api.h"
@@ skipping 133 matching lines @@
 // Static representation of a wasm data segment.
 struct WasmDataSegment {
   uint32_t dest_addr;      // destination memory address of the data.
   uint32_t source_offset;  // start offset in the module bytes.
   uint32_t source_size;    // end offset in the module bytes.
   bool init;               // true if loaded upon instantiation.
 };
 
 // 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.
 };
 
 enum ModuleOrigin { kWasmOrigin, kAsmJsOrigin };
 
 // Static representation of a module.
 struct WasmModule {
   static const uint32_t kPageSize = 0x10000;    // Page size, 64kb.
@@ skipping 136 matching lines @@
     return module->globals[index].type;
   }
   FunctionSig* GetFunctionSignature(uint32_t index) {
     DCHECK(IsValidFunction(index));
     return module->functions[index].sig;
   }
   FunctionSig* GetImportSignature(uint32_t index) {
     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];
   }
   const WasmIndirectFunctionTable* GetTable(uint32_t index) const {
     DCHECK(IsValidTable(index));
     return &module->function_tables[index];
   }
 
   bool asm_js() { return origin == kAsmJsOrigin; }
@@ skipping 69 matching lines @@
 // Constructs a single function table as a FixedArray of double size,
 // populating it with function signature indices and function indices.
 Handle<FixedArray> BuildFunctionTable(Isolate* isolate, uint32_t index,
                                       const WasmModule* module);
 
 // Populates a function table by replacing function indices with handles to
 // the compiled code.
 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
 // given encoded module. The module should have no imports.
 int32_t CompileAndRunWasmModule(Isolate* isolate, const byte* module_start,
                                 const byte* module_end, bool asm_js = false);
 
 }  // namespace testing
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_WASM_MODULE_H_