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Issue 2760233005: [snapshot] Move builtins generation into mksnapshot (Closed)
Patch Set: fix GYP builds Created 3 years, 8 months ago
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1 // Copyright 2017 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 #include "src/interpreter/setup-interpreter.h"
6
7 #include "src/handles-inl.h"
8 #include "src/interpreter/bytecodes.h"
9 #include "src/interpreter/interpreter-generator.h"
10 #include "src/interpreter/interpreter.h"
11 #include "src/objects-inl.h"
12
13 namespace v8 {
14 namespace internal {
15 namespace interpreter {
16
17 // static
18 void SetupInterpreter::InstallBytecodeHandlers(Interpreter* interpreter) {
19 DCHECK(!interpreter->IsDispatchTableInitialized());
20 HandleScope scope(interpreter->isolate_);
21 Address* dispatch_table = interpreter->dispatch_table_;
22
23 // Generate bytecode handlers for all bytecodes and scales.
24 const OperandScale kOperandScales[] = {
25 #define VALUE(Name, _) OperandScale::k##Name,
26 OPERAND_SCALE_LIST(VALUE)
27 #undef VALUE
28 };
29
30 for (OperandScale operand_scale : kOperandScales) {
31 #define GENERATE_CODE(Name, ...) \
32 InstallBytecodeHandler(interpreter->isolate_, dispatch_table, \
33 Bytecode::k##Name, operand_scale);
34 BYTECODE_LIST(GENERATE_CODE)
35 #undef GENERATE_CODE
36 }
37
38 // Fill unused entries will the illegal bytecode handler.
39 size_t illegal_index = Interpreter::GetDispatchTableIndex(
40 Bytecode::kIllegal, OperandScale::kSingle);
41 for (size_t index = 0; index < Interpreter::kDispatchTableSize; ++index) {
42 if (dispatch_table[index] == nullptr) {
43 dispatch_table[index] = dispatch_table[illegal_index];
44 }
45 }
46
47 // Initialization should have been successful.
48 DCHECK(interpreter->IsDispatchTableInitialized());
49 }
50
51 // static
52 bool SetupInterpreter::ReuseExistingHandler(Address* dispatch_table,
53 Bytecode bytecode,
54 OperandScale operand_scale) {
55 size_t index = Interpreter::GetDispatchTableIndex(bytecode, operand_scale);
56 switch (bytecode) {
57 case Bytecode::kCallProperty:
58 case Bytecode::kCallProperty0:
59 case Bytecode::kCallProperty1:
60 case Bytecode::kCallProperty2: {
61 const int offset = static_cast<int>(Bytecode::kCallProperty) -
62 static_cast<int>(Bytecode::kCall);
63 STATIC_ASSERT(offset == static_cast<int>(Bytecode::kCallProperty0) -
64 static_cast<int>(Bytecode::kCall0));
65 STATIC_ASSERT(offset == static_cast<int>(Bytecode::kCallProperty1) -
66 static_cast<int>(Bytecode::kCall1));
67 STATIC_ASSERT(offset == static_cast<int>(Bytecode::kCallProperty2) -
68 static_cast<int>(Bytecode::kCall2));
69 CHECK_LT(offset, index);
70 dispatch_table[index] = dispatch_table[index - offset];
71 return true;
72 break;
73 }
74 default:
75 return false;
76 }
77 }
78
79 // static
80 void SetupInterpreter::InstallBytecodeHandler(Isolate* isolate,
81 Address* dispatch_table,
82 Bytecode bytecode,
83 OperandScale operand_scale) {
84 if (!Bytecodes::BytecodeHasHandler(bytecode, operand_scale)) return;
85 if (ReuseExistingHandler(dispatch_table, bytecode, operand_scale)) return;
86
87 size_t index = Interpreter::GetDispatchTableIndex(bytecode, operand_scale);
88 Handle<Code> code = GenerateBytecodeHandler(isolate, bytecode, operand_scale);
89 dispatch_table[index] = code->entry();
90 }
91
92 } // namespace interpreter
93 } // namespace internal
94 } // namespace v8
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