[wasm] Add an export table.

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 "src/wasm/wasm-opcodes.h"
 #include "src/wasm/wasm-result.h"
 
@@ skipping 15 matching lines @@
 enum WasmSectionDeclCode {
   kDeclMemory = 0x00,
   kDeclSignatures = 0x01,
   kDeclFunctions = 0x02,
   kDeclGlobals = 0x03,
   kDeclDataSegments = 0x04,
   kDeclFunctionTable = 0x05,
   kDeclEnd = 0x06,
   kDeclStartFunction = 0x07,
   kDeclImportTable = 0x08,
+  kDeclExportTable = 0x09,
   kDeclWLL = 0x11,
 };
 
 static const int kMaxModuleSectionCode = 0x11;
 
 enum WasmFunctionDeclBit {
   kDeclFunctionName = 0x01,
   kDeclFunctionImport = 0x02,
   kDeclFunctionLocals = 0x04,
   kDeclFunctionExport = 0x08
@@ skipping 21 matching lines @@
 };
 
 // Static representation of an imported WASM function.
 struct WasmImport {
   FunctionSig* sig;               // signature of the function.
   uint16_t sig_index;             // index into the signature table.
   uint32_t module_name_offset;    // offset in module bytes of the module name.
   uint32_t function_name_offset;  // offset in module bytes of the import name.
 };
 
+// Static representation of an exported WASM function.
+struct WasmExport {
+  uint16_t func_index;   // index into the function table.
+  uint32_t name_offset;  // offset in module bytes of the name to export.
+};
+
 // Static representation of a wasm global variable.
 struct WasmGlobal {
   uint32_t name_offset;  // offset in the module bytes of the name, if any.
   MachineType type;      // type of the global.
   uint32_t offset;       // offset from beginning of globals area.
   bool exported;         // true if this global is exported.
 };
 
 // Static representation of a wasm data segment.
 struct WasmDataSegment {
@@ skipping 16 matching lines @@
   bool mem_export;            // true if the memory is exported.
   bool mem_external;          // true if the memory is external.
   int start_function_index;   // start function, if any.
 
   std::vector<WasmGlobal>* globals;             // globals in this module.
   std::vector<FunctionSig*>* signatures;        // signatures in this module.
   std::vector<WasmFunction>* functions;         // functions in this module.
   std::vector<WasmDataSegment>* data_segments;  // data segments in this module.
   std::vector<uint16_t>* function_table;        // function table.
   std::vector<WasmImport>* import_table;        // import table.
+  std::vector<WasmExport>* export_table;        // export table.
 
   WasmModule();
   ~WasmModule();
 
   // Get a pointer to a string stored in the module bytes representing a name.
   const char* GetName(uint32_t offset) const {
     if (offset == 0) return "<?>";  // no name.
     CHECK(BoundsCheck(offset, offset + 1));
     return reinterpret_cast<const char*>(module_start + offset);
   }
@@ skipping 113 matching lines @@
 
 // For testing. Decode, verify, and run the last exported function in the
 // given decoded module.
 int32_t CompileAndRunWasmModule(Isolate* isolate, WasmModule* module);
 
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_WASM_MODULE_H_