Line data    Source code

       1             : // Copyright 2018 the V8 project authors. All rights reserved.
       2             : // Use of this source code is governed by a BSD-style license that can be
       3             : // found in the LICENSE file.
       4             : 
       5             : #ifndef V8_WASM_OBJECT_ACCESS_H_
       6             : #define V8_WASM_OBJECT_ACCESS_H_
       7             : 
       8             : #include "src/globals.h"
       9             : #include "src/objects/fixed-array.h"
      10             : #include "src/objects/js-objects.h"
      11             : #include "src/objects/shared-function-info.h"
      12             : 
      13             : namespace v8 {
      14             : namespace internal {
      15             : namespace wasm {
      16             : 
      17             : class ObjectAccess : public AllStatic {
      18             :  public:
      19             :   // Convert an offset into an object to an offset into a tagged object.
      20      164385 :   static constexpr int ToTagged(int offset) { return offset - kHeapObjectTag; }
      21             : 
      22             :   // Get the offset into a fixed array for a given {index}.
      23             :   static constexpr int ElementOffsetInTaggedFixedArray(int index) {
      24             :     return ToTagged(FixedArray::OffsetOfElementAt(index));
      25             :   }
      26             : 
      27             :   // Get the offset of the context stored in a {JSFunction} object.
      28             :   static constexpr int ContextOffsetInTaggedJSFunction() {
      29             :     return ToTagged(JSFunction::kContextOffset);
      30             :   }
      31             : 
      32             :   // Get the offset of the shared function info in a {JSFunction} object.
      33             :   static constexpr int SharedFunctionInfoOffsetInTaggedJSFunction() {
      34             :     return ToTagged(JSFunction::kSharedFunctionInfoOffset);
      35             :   }
      36             : 
      37             :   // Get the offset of the formal parameter count in a {SharedFunctionInfo}
      38             :   // object.
      39             :   static constexpr int FormalParameterCountOffsetInSharedFunctionInfo() {
      40             :     return ToTagged(SharedFunctionInfo::kFormalParameterCountOffset);
      41             :   }
      42             : };
      43             : 
      44             : }  // namespace wasm
      45             : }  // namespace internal
      46             : }  // namespace v8
      47             : 
      48             : #endif  // V8_WASM_OBJECT_ACCESS_H_