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// Copyright 2014 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.
#include "src/property.h"
#include "src/field-type.h"
#include "src/handles-inl.h"
#include "src/objects-inl.h"
#include "src/objects/name-inl.h"
#include "src/ostreams.h"
namespace v8 {
namespace internal {
std::ostream& operator<<(std::ostream& os,
const PropertyAttributes& attributes) {
os << "[";
os << (((attributes & READ_ONLY) == 0) ? "W" : "_"); // writable
os << (((attributes & DONT_ENUM) == 0) ? "E" : "_"); // enumerable
os << (((attributes & DONT_DELETE) == 0) ? "C" : "_"); // configurable
os << "]";
return os;
}
Descriptor::Descriptor() : details_(Smi::kZero) {}
Descriptor::Descriptor(Handle<Name> key, MaybeObjectHandle value,
PropertyKind kind, PropertyAttributes attributes,
PropertyLocation location, PropertyConstness constness,
Representation representation, int field_index)
: key_(key),
value_(value),
details_(kind, attributes, location, constness, representation,
field_index) {
DCHECK(key->IsUniqueName());
DCHECK_IMPLIES(key->IsPrivate(), !details_.IsEnumerable());
}
Descriptor::Descriptor(Handle<Name> key, MaybeObjectHandle value,
PropertyDetails details)
: key_(key), value_(value), details_(details) {
DCHECK(key->IsUniqueName());
DCHECK_IMPLIES(key->IsPrivate(), !details_.IsEnumerable());
}
Descriptor Descriptor::DataField(Isolate* isolate, Handle<Name> key,
int field_index, PropertyAttributes attributes,
Representation representation) {
return DataField(key, field_index, attributes, PropertyConstness::kMutable,
representation, MaybeObjectHandle(FieldType::Any(isolate)));
}
Descriptor Descriptor::DataField(Handle<Name> key, int field_index,
PropertyAttributes attributes,
PropertyConstness constness,
Representation representation,
MaybeObjectHandle wrapped_field_type) {
DCHECK(wrapped_field_type->IsSmi() || wrapped_field_type->IsWeakHeapObject());
PropertyDetails details(kData, attributes, kField, constness, representation,
field_index);
return Descriptor(key, wrapped_field_type, details);
}
Descriptor Descriptor::DataConstant(Handle<Name> key, Handle<Object> value,
PropertyAttributes attributes) {
return Descriptor(key, MaybeObjectHandle(value), kData, attributes,
kDescriptor, PropertyConstness::kConst,
value->OptimalRepresentation(), 0);
}
Descriptor Descriptor::DataConstant(Isolate* isolate, Handle<Name> key,
int field_index, Handle<Object> value,
PropertyAttributes attributes) {
if (FLAG_track_constant_fields) {
MaybeObjectHandle any_type(FieldType::Any(), isolate);
return DataField(key, field_index, attributes, PropertyConstness::kConst,
Representation::Tagged(), any_type);
} else {
return Descriptor(key, MaybeObjectHandle(value), kData, attributes,
kDescriptor, PropertyConstness::kConst,
value->OptimalRepresentation(), field_index);
}
}
Descriptor Descriptor::AccessorConstant(Handle<Name> key,
Handle<Object> foreign,
PropertyAttributes attributes) {
return Descriptor(key, MaybeObjectHandle(foreign), kAccessor, attributes,
kDescriptor, PropertyConstness::kConst,
Representation::Tagged(), 0);
}
// Outputs PropertyDetails as a dictionary details.
void PropertyDetails::PrintAsSlowTo(std::ostream& os) {
os << "(";
if (constness() == PropertyConstness::kConst) os << "const ";
os << (kind() == kData ? "data" : "accessor");
os << ", dict_index: " << dictionary_index();
os << ", attrs: " << attributes() << ")";
}
// Outputs PropertyDetails as a descriptor array details.
void PropertyDetails::PrintAsFastTo(std::ostream& os, PrintMode mode) {
os << "(";
if (constness() == PropertyConstness::kConst) os << "const ";
os << (kind() == kData ? "data" : "accessor");
if (location() == kField) {
os << " field";
if (mode & kPrintFieldIndex) {
os << " " << field_index();
}
if (mode & kPrintRepresentation) {
os << ":" << representation().Mnemonic();
}
} else {
os << " descriptor";
}
if (mode & kPrintPointer) {
os << ", p: " << pointer();
}
if (mode & kPrintAttributes) {
os << ", attrs: " << attributes();
}
os << ")";
}
#ifdef OBJECT_PRINT
void PropertyDetails::Print(bool dictionary_mode) {
StdoutStream os;
if (dictionary_mode) {
PrintAsSlowTo(os);
} else {
PrintAsFastTo(os, PrintMode::kPrintFull);
}
os << "\n" << std::flush;
}
#endif
} // namespace internal
} // namespace v8
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