V8 API Reference, 7.2.502.16 (for Deno 0.2.4)
code-reference.h
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_CODE_REFERENCE_H_
6 #define V8_CODE_REFERENCE_H_
7 
8 #include "src/handles.h"
9 #include "src/objects/code.h"
10 
11 namespace v8 {
12 namespace internal {
13 
14 class Code;
15 
16 namespace wasm {
17 class WasmCode;
18 }
19 
21  public:
22  CodeReference() : kind_(JS), js_code_() {}
23  explicit CodeReference(const wasm::WasmCode* wasm_code)
24  : kind_(WASM), wasm_code_(wasm_code) {}
25  explicit CodeReference(Handle<Code> js_code) : kind_(JS), js_code_(js_code) {}
26 
27  Address constant_pool() const;
28  Address instruction_start() const;
29  Address instruction_end() const;
30  int instruction_size() const;
31  const byte* relocation_start() const;
32  const byte* relocation_end() const;
33  int relocation_size() const;
34  bool is_null() const {
35  return kind_ == JS ? js_code_.is_null() : wasm_code_ == nullptr;
36  }
37 
38  Handle<Code> as_js_code() const {
39  DCHECK_EQ(JS, kind_);
40  return js_code_;
41  }
42 
43  const wasm::WasmCode* as_wasm_code() const {
44  DCHECK_EQ(WASM, kind_);
45  return wasm_code_;
46  }
47 
48  private:
49  enum { JS, WASM } kind_;
50  union {
51  const wasm::WasmCode* wasm_code_;
52  Handle<Code> js_code_;
53  };
54 
55  DISALLOW_NEW_AND_DELETE();
56 };
57 ASSERT_TRIVIALLY_COPYABLE(CodeReference);
58 
59 } // namespace internal
60 } // namespace v8
61 
62 #endif // V8_CODE_REFERENCE_H_
Definition: libplatform.h:13