1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
// Copyright 2016 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_BUILTINS_BUILTINS_UTILS_H_
#define V8_BUILTINS_BUILTINS_UTILS_H_
#include "src/arguments.h"
#include "src/base/logging.h"
#include "src/builtins/builtins.h"
namespace v8 {
namespace internal {
namespace compiler {
class CodeAssemblerState;
}
// Arguments object passed to C++ builtins.
class BuiltinArguments : public Arguments {
public:
BuiltinArguments(int length, Object** arguments)
: Arguments(length, arguments) {
// Check we have at least the receiver.
DCHECK_LE(1, this->length());
}
Object*& operator[](int index) {
DCHECK_LT(index, length());
return Arguments::operator[](index);
}
template <class S = Object>
Handle<S> at(int index) {
DCHECK_LT(index, length());
return Arguments::at<S>(index);
}
Handle<Object> atOrUndefined(Isolate* isolate, int index) {
if (index >= length()) {
return isolate->factory()->undefined_value();
}
return at<Object>(index);
}
Handle<Object> receiver() { return Arguments::at<Object>(0); }
static const int kNewTargetOffset = 0;
static const int kTargetOffset = 1;
static const int kArgcOffset = 2;
static const int kNumExtraArgs = 3;
static const int kNumExtraArgsWithReceiver = 4;
Handle<JSFunction> target() {
return Arguments::at<JSFunction>(Arguments::length() - 1 - kTargetOffset);
}
Handle<HeapObject> new_target() {
return Arguments::at<HeapObject>(Arguments::length() - 1 -
kNewTargetOffset);
}
// Gets the total number of arguments including the receiver (but
// excluding extra arguments).
int length() const { return Arguments::length() - kNumExtraArgs; }
};
// ----------------------------------------------------------------------------
// Support macro for defining builtins in C++.
// ----------------------------------------------------------------------------
//
// A builtin function is defined by writing:
//
// BUILTIN(name) {
// ...
// }
//
// In the body of the builtin function the arguments can be accessed
// through the BuiltinArguments object args.
// TODO(cbruni): add global flag to check whether any tracing events have been
// enabled.
#define BUILTIN(name) \
MUST_USE_RESULT static Object* Builtin_Impl_##name(BuiltinArguments args, \
Isolate* isolate); \
\
V8_NOINLINE static Object* Builtin_Impl_Stats_##name( \
int args_length, Object** args_object, Isolate* isolate) { \
BuiltinArguments args(args_length, args_object); \
RuntimeCallTimerScope timer(isolate, &RuntimeCallStats::Builtin_##name); \
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.runtime"), \
"V8.Builtin_" #name); \
return Builtin_Impl_##name(args, isolate); \
} \
\
MUST_USE_RESULT Object* Builtin_##name( \
int args_length, Object** args_object, Isolate* isolate) { \
DCHECK(isolate->context() == nullptr || isolate->context()->IsContext()); \
if (V8_UNLIKELY(FLAG_runtime_stats)) { \
return Builtin_Impl_Stats_##name(args_length, args_object, isolate); \
} \
BuiltinArguments args(args_length, args_object); \
return Builtin_Impl_##name(args, isolate); \
} \
\
MUST_USE_RESULT static Object* Builtin_Impl_##name(BuiltinArguments args, \
Isolate* isolate)
// ----------------------------------------------------------------------------
// Support macro for defining builtins with Turbofan.
// ----------------------------------------------------------------------------
//
// A builtin function is defined by writing:
//
// TF_BUILTIN(name, code_assember_base_class) {
// ...
// }
//
// In the body of the builtin function the arguments can be accessed
// as "Parameter(n)".
#define TF_BUILTIN(Name, AssemblerBase) \
class Name##Assembler : public AssemblerBase { \
public: \
explicit Name##Assembler(compiler::CodeAssemblerState* state) \
: AssemblerBase(state) {} \
void Generate##NameImpl(); \
}; \
void Builtins::Generate_##Name(compiler::CodeAssemblerState* state) { \
Name##Assembler assembler(state); \
assembler.Generate##NameImpl(); \
} \
void Name##Assembler::Generate##NameImpl()
// ----------------------------------------------------------------------------
#define CHECK_RECEIVER(Type, name, method) \
if (!args.receiver()->Is##Type()) { \
THROW_NEW_ERROR_RETURN_FAILURE( \
isolate, \
NewTypeError(MessageTemplate::kIncompatibleMethodReceiver, \
isolate->factory()->NewStringFromAsciiChecked(method), \
args.receiver())); \
} \
Handle<Type> name = Handle<Type>::cast(args.receiver())
// Throws a TypeError for {method} if the receiver is not coercible to Object,
// or converts the receiver to a String otherwise and assigns it to a new var
// with the given {name}.
#define TO_THIS_STRING(name, method) \
if (args.receiver()->IsNullOrUndefined(isolate)) { \
THROW_NEW_ERROR_RETURN_FAILURE( \
isolate, \
NewTypeError(MessageTemplate::kCalledOnNullOrUndefined, \
isolate->factory()->NewStringFromAsciiChecked(method))); \
} \
Handle<String> name; \
ASSIGN_RETURN_FAILURE_ON_EXCEPTION( \
isolate, name, Object::ToString(isolate, args.receiver()))
} // namespace internal
} // namespace v8
#endif // V8_BUILTINS_BUILTINS_UTILS_H_
|
