[wasm] Extend wasm object validation to WasmCompiledModule

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 329 matching lines @@
 std::ostream& operator<<(std::ostream& os, const WasmFunctionName& name);
 
 typedef Result<const WasmModule*> ModuleResult;
 typedef Result<WasmFunction*> FunctionResult;
 typedef std::vector<std::pair<int, int>> FunctionOffsets;
 typedef Result<FunctionOffsets> FunctionOffsetsResult;
 
 class WasmCompiledModule : public FixedArray {
  public:
   static WasmCompiledModule* cast(Object* fixed_array) {
+    SLOW_DCHECK(IsWasmCompiledModule(fixed_array));
     return reinterpret_cast<WasmCompiledModule*>(fixed_array);
   }
 
 #define WCM_OBJECT_OR_WEAK(TYPE, NAME, ID)                           \
   Handle<TYPE> NAME() const { return handle(ptr_to_##NAME()); }      \
                                                                      \
   MaybeHandle<TYPE> maybe_##NAME() const {                           \
     if (has_##NAME()) return NAME();                                 \
     return MaybeHandle<TYPE>();                                      \
   }                                                                  \
@@ skipping 26 matching lines @@
     return handle(TYPE::cast(weak_##NAME()->value()));   \
   }
 
 #define CORE_WCM_PROPERTY_TABLE(MACRO)                \
   MACRO(OBJECT, FixedArray, code_table)               \
   MACRO(OBJECT, FixedArray, imports)                  \
   MACRO(OBJECT, FixedArray, exports)                  \
   MACRO(OBJECT, FixedArray, inits)                    \
   MACRO(OBJECT, FixedArray, startup_function)         \
   MACRO(OBJECT, FixedArray, indirect_function_tables) \
-  MACRO(OBJECT, String, module_bytes)                 \
+  MACRO(OBJECT, SeqOneByteString, module_bytes)       \
   MACRO(OBJECT, ByteArray, function_names)            \
   MACRO(SMALL_NUMBER, uint32_t, min_memory_pages)     \
   MACRO(OBJECT, FixedArray, data_segments_info)       \
   MACRO(OBJECT, ByteArray, data_segments)             \
   MACRO(SMALL_NUMBER, uint32_t, globals_size)         \
   MACRO(OBJECT, JSArrayBuffer, heap)                  \
   MACRO(SMALL_NUMBER, ModuleOrigin, origin)           \
   MACRO(WEAK_LINK, WasmCompiledModule, next_instance) \
   MACRO(WEAK_LINK, WasmCompiledModule, prev_instance) \
   MACRO(WEAK_LINK, JSObject, owning_instance)         \
@@ skipping 40 matching lines @@
   }
 
   uint32_t default_mem_size() const {
     return min_memory_pages() * WasmModule::kPageSize;
   }
 
 #define DECLARATION(KIND, TYPE, NAME) WCM_##KIND(TYPE, NAME)
   WCM_PROPERTY_TABLE(DECLARATION)
 #undef DECLARATION
 
+  static bool IsWasmCompiledModule(Object* obj);
+
   void PrintInstancesChain();
 
  private:
   void Init();
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(WasmCompiledModule);
 };
 
 // Extract a function name from the given wasm object.
 // Returns "<WASM UNNAMED>" if the function is unnamed or the name is not a
@@ skipping 78 matching lines @@
                             int instance_count);
 void ValidateModuleState(Isolate* isolate, Handle<JSObject> module_obj);
 void ValidateOrphanedInstance(Isolate* isolate, Handle<JSObject> instance);
 
 }  // namespace testing
 }  // namespace wasm
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_WASM_MODULE_H_