AuroraMiddleware/v8
1
0
Fork 0
Code Issues 2 Pull Requests Releases Wiki Activity

MIPS: Introduce LanguageMode, drop StrictMode.

Browse Source 
Port c7851da4ae

Original commit message:
This enables adding more language modes in the future.

For maximum flexibility, LanguageMode is a bitmask, so we're not restricted to
use a sequence of language modes which are progressively stricter, but we can
express the language mode as combination of features.

For now, LanguageMode can only be "sloppy" or "strict", and there are
STATIC_ASSERTS in places which need to change when more modes are added.

LanguageMode is a bit like the old LanguageMode when "extended" mode was still
around (see https://codereview.chromium.org/8417035 and
https://codereview.chromium.org/181543002 ) except that it's transmitted through
all the layers (there's no StrictModeFlag).

BUG=

Review URL: https://codereview.chromium.org/890413003

Cr-Commit-Position: refs/heads/master@{#26431}
This commit is contained in:
balazs.kilvady 2015-02-04 07:14:35 -08:00 committed by Commit bot
parent 1f7e3b3483
commit ff0c70380a
13 changed files with 65 additions and 63 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
src/compiler/mips64/code-generator-mips64.cc
View File

@ -1061,7 +1061,7 @@ void CodeGenerator::AssemblePrologue() {
// global proxy when called as functions (without an explicit receiver
// object).
// TODO(mstarzinger/verwaest): Should this be moved back into the CallIC?
if (info->strict_mode() == SLOPPY && !info->is_native()) {
if (is_sloppy(info->language_mode()) && !info->is_native()) {
Label ok;
// +2 for return address and saved frame pointer.
int receiver_slot = info->scope()->num_parameters() + 2;

6
src/ic/mips/ic-compiler-mips.cc
View File

@ -121,12 +121,12 @@ Handle<Code> PropertyICCompiler::CompileKeyedStorePolymorphic(
#define __ ACCESS_MASM(masm)
void PropertyICCompiler::GenerateRuntimeSetProperty(MacroAssembler* masm,
StrictMode strict_mode) {
void PropertyICCompiler::GenerateRuntimeSetProperty(
MacroAssembler* masm, LanguageMode language_mode) {
__ Push(StoreDescriptor::ReceiverRegister(), StoreDescriptor::NameRegister(),
StoreDescriptor::ValueRegister());
__ li(a0, Operand(Smi::FromInt(strict_mode)));
__ li(a0, Operand(Smi::FromInt(language_mode)));
__ Push(a0);
// Do tail-call to runtime routine.

4
src/ic/mips/ic-mips.cc
View File

@ -724,7 +724,7 @@ static void KeyedStoreGenerateMegamorphicHelper(
void KeyedStoreIC::GenerateMegamorphic(MacroAssembler* masm,
StrictMode strict_mode) {
LanguageMode language_mode) {
// ---------- S t a t e --------------
// -- a0 : value
// -- a1 : key
@ -775,7 +775,7 @@ void KeyedStoreIC::GenerateMegamorphic(MacroAssembler* masm,
// a0: value.
// a1: key.
// a2: receiver.
PropertyICCompiler::GenerateRuntimeSetProperty(masm, strict_mode);
PropertyICCompiler::GenerateRuntimeSetProperty(masm, language_mode);
// Never returns to here.
__ bind(&maybe_name_key);

6
src/ic/mips64/ic-compiler-mips64.cc
View File

@ -121,12 +121,12 @@ Handle<Code> PropertyICCompiler::CompileKeyedStorePolymorphic(
#define __ ACCESS_MASM(masm)
void PropertyICCompiler::GenerateRuntimeSetProperty(MacroAssembler* masm,
StrictMode strict_mode) {
void PropertyICCompiler::GenerateRuntimeSetProperty(
MacroAssembler* masm, LanguageMode language_mode) {
__ Push(StoreDescriptor::ReceiverRegister(), StoreDescriptor::NameRegister(),
StoreDescriptor::ValueRegister());
__ li(a0, Operand(Smi::FromInt(strict_mode)));
__ li(a0, Operand(Smi::FromInt(language_mode)));
__ Push(a0);
// Do tail-call to runtime routine.

4
src/ic/mips64/ic-mips64.cc
View File

@ -726,7 +726,7 @@ static void KeyedStoreGenerateMegamorphicHelper(
void KeyedStoreIC::GenerateMegamorphic(MacroAssembler* masm,
StrictMode strict_mode) {
LanguageMode language_mode) {
// ---------- S t a t e --------------
// -- a0 : value
// -- a1 : key
@ -777,7 +777,7 @@ void KeyedStoreIC::GenerateMegamorphic(MacroAssembler* masm,
// a0: value.
// a1: key.
// a2: receiver.
PropertyICCompiler::GenerateRuntimeSetProperty(masm, strict_mode);
PropertyICCompiler::GenerateRuntimeSetProperty(masm, language_mode);
// Never returns to here.
__ bind(&maybe_name_key);

38
src/mips/full-codegen-mips.cc
View File

@ -134,7 +134,7 @@ void FullCodeGenerator::Generate() {
// Sloppy mode functions and builtins need to replace the receiver with the
// global proxy when called as functions (without an explicit receiver
// object).
if (info->strict_mode() == SLOPPY && !info->is_native()) {
if (is_sloppy(info->language_mode()) && !info->is_native()) {
Label ok;
int receiver_offset = info->scope()->num_parameters() * kPointerSize;
__ lw(at, MemOperand(sp, receiver_offset));
@ -272,7 +272,7 @@ void FullCodeGenerator::Generate() {
// The stub will rewrite receiever and parameter count if the previous
// stack frame was an arguments adapter frame.
ArgumentsAccessStub::Type type;
if (strict_mode() == STRICT) {
if (is_strict(language_mode())) {
type = ArgumentsAccessStub::NEW_STRICT;
} else if (function()->has_duplicate_parameters()) {
type = ArgumentsAccessStub::NEW_SLOPPY_SLOW;
@ -1287,7 +1287,7 @@ void FullCodeGenerator::EmitNewClosure(Handle<SharedFunctionInfo> info,
!pretenure &&
scope()->is_function_scope() &&
info->num_literals() == 0) {
FastNewClosureStub stub(isolate(), info->strict_mode(), info->kind());
FastNewClosureStub stub(isolate(), info->language_mode(), info->kind());
__ li(a2, Operand(info));
__ CallStub(&stub);
} else {
@ -2641,7 +2641,7 @@ void FullCodeGenerator::EmitAssignment(Expression* expr) {
__ Pop(StoreDescriptor::ValueRegister(),
StoreDescriptor::ReceiverRegister());
Handle<Code> ic =
CodeFactory::KeyedStoreIC(isolate(), strict_mode()).code();
CodeFactory::KeyedStoreIC(isolate(), language_mode()).code();
CallIC(ic);
break;
}
@ -2708,8 +2708,8 @@ void FullCodeGenerator::EmitVariableAssignment(Variable* var, Token::Value op) {
if (var->IsLookupSlot()) {
// Assignment to var.
__ li(a1, Operand(var->name()));
__ li(a0, Operand(Smi::FromInt(strict_mode())));
__ Push(v0, cp, a1, a0); // Value, context, name, strict mode.
__ li(a0, Operand(Smi::FromInt(language_mode())));
__ Push(v0, cp, a1, a0); // Value, context, name, language mode.
__ CallRuntime(Runtime::kStoreLookupSlot, 4);
} else {
// Assignment to var or initializing assignment to let/const in harmony
@ -2724,7 +2724,7 @@ void FullCodeGenerator::EmitVariableAssignment(Variable* var, Token::Value op) {
}
EmitStoreToStackLocalOrContextSlot(var, location);
}
} else if (IsSignallingAssignmentToConst(var, op, strict_mode())) {
} else if (IsSignallingAssignmentToConst(var, op, language_mode())) {
__ CallRuntime(Runtime::kThrowConstAssignError, 0);
}
}
@ -2759,8 +2759,8 @@ void FullCodeGenerator::EmitNamedSuperPropertyStore(Property* prop) {
__ Push(key->value());
__ Push(v0);
__ CallRuntime((strict_mode() == STRICT ? Runtime::kStoreToSuper_Strict
: Runtime::kStoreToSuper_Sloppy),
__ CallRuntime((is_strict(language_mode()) ? Runtime::kStoreToSuper_Strict
: Runtime::kStoreToSuper_Sloppy),
4);
}
@ -2772,9 +2772,10 @@ void FullCodeGenerator::EmitKeyedSuperPropertyStore(Property* prop) {
DCHECK(prop != NULL);
__ Push(v0);
__ CallRuntime((strict_mode() == STRICT ? Runtime::kStoreKeyedToSuper_Strict
: Runtime::kStoreKeyedToSuper_Sloppy),
4);
__ CallRuntime(
(is_strict(language_mode()) ? Runtime::kStoreKeyedToSuper_Strict
: Runtime::kStoreKeyedToSuper_Sloppy),
4);
}
@ -2792,7 +2793,8 @@ void FullCodeGenerator::EmitKeyedPropertyAssignment(Assignment* expr) {
__ Pop(StoreDescriptor::ReceiverRegister(), StoreDescriptor::NameRegister());
DCHECK(StoreDescriptor::ValueRegister().is(a0));
Handle<Code> ic = CodeFactory::KeyedStoreIC(isolate(), strict_mode()).code();
Handle<Code> ic =
CodeFactory::KeyedStoreIC(isolate(), language_mode()).code();
CallIC(ic, expr->AssignmentFeedbackId());
PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);
@ -3010,8 +3012,8 @@ void FullCodeGenerator::EmitResolvePossiblyDirectEval(int arg_count) {
int receiver_offset = 2 + info_->scope()->num_parameters();
__ lw(t1, MemOperand(fp, receiver_offset * kPointerSize));
// t0: the strict mode.
__ li(t0, Operand(Smi::FromInt(strict_mode())));
// t0: the language mode.
__ li(t0, Operand(Smi::FromInt(language_mode())));
// a1: the start position of the scope the calls resides in.
__ li(a1, Operand(Smi::FromInt(scope()->start_position())));
@ -4575,7 +4577,7 @@ void FullCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) {
if (property != NULL) {
VisitForStackValue(property->obj());
VisitForStackValue(property->key());
__ li(a1, Operand(Smi::FromInt(strict_mode())));
__ li(a1, Operand(Smi::FromInt(language_mode())));
__ push(a1);
__ InvokeBuiltin(Builtins::DELETE, CALL_FUNCTION);
context()->Plug(v0);
@ -4583,7 +4585,7 @@ void FullCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) {
Variable* var = proxy->var();
// Delete of an unqualified identifier is disallowed in strict mode
// but "delete this" is allowed.
DCHECK(strict_mode() == SLOPPY || var->is_this());
DCHECK(is_sloppy(language_mode()) || var->is_this());
if (var->IsUnallocated()) {
__ lw(a2, GlobalObjectOperand());
__ li(a1, Operand(var->name()));
@ -4906,7 +4908,7 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
__ Pop(StoreDescriptor::ReceiverRegister(),
StoreDescriptor::NameRegister());
Handle<Code> ic =
CodeFactory::KeyedStoreIC(isolate(), strict_mode()).code();
CodeFactory::KeyedStoreIC(isolate(), language_mode()).code();
CallIC(ic, expr->CountStoreFeedbackId());
PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);
if (expr->is_postfix()) {

9
src/mips/lithium-codegen-mips.cc
View File

@ -142,8 +142,7 @@ bool LCodeGen::GeneratePrologue() {
// Sloppy mode functions and builtins need to replace the receiver with the
// global proxy when called as functions (without an explicit receiver
// object).
if (info_->this_has_uses() &&
info_->strict_mode() == SLOPPY &&
if (info_->this_has_uses() && is_sloppy(info_->language_mode()) &&
!info_->is_native()) {
Label ok;
int receiver_offset = info_->scope()->num_parameters() * kPointerSize;
@ -4254,7 +4253,7 @@ void LCodeGen::DoStoreNamedGeneric(LStoreNamedGeneric* instr) {
DCHECK(ToRegister(instr->value()).is(StoreDescriptor::ValueRegister()));
__ li(StoreDescriptor::NameRegister(), Operand(instr->name()));
Handle<Code> ic = StoreIC::initialize_stub(isolate(), instr->strict_mode());
Handle<Code> ic = StoreIC::initialize_stub(isolate(), instr->language_mode());
CallCode(ic, RelocInfo::CODE_TARGET, instr);
}
@ -4486,7 +4485,7 @@ void LCodeGen::DoStoreKeyedGeneric(LStoreKeyedGeneric* instr) {
DCHECK(ToRegister(instr->value()).is(StoreDescriptor::ValueRegister()));
Handle<Code> ic =
CodeFactory::KeyedStoreIC(isolate(), instr->strict_mode()).code();
CodeFactory::KeyedStoreIC(isolate(), instr->language_mode()).code();
CallCode(ic, RelocInfo::CODE_TARGET, instr);
}
@ -5542,7 +5541,7 @@ void LCodeGen::DoFunctionLiteral(LFunctionLiteral* instr) {
// space for nested functions that don't need literals cloning.
bool pretenure = instr->hydrogen()->pretenure();
if (!pretenure && instr->hydrogen()->has_no_literals()) {
FastNewClosureStub stub(isolate(), instr->hydrogen()->strict_mode(),
FastNewClosureStub stub(isolate(), instr->hydrogen()->language_mode(),
instr->hydrogen()->kind());
__ li(a2, Operand(instr->hydrogen()->shared_info()));
CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);

2
src/mips/lithium-codegen-mips.h
View File

@ -143,7 +143,7 @@ class LCodeGen: public LCodeGenBase {
#undef DECLARE_DO
private:
StrictMode strict_mode() const { return info()->strict_mode(); }
LanguageMode language_mode() const { return info()->language_mode(); }
Scope* scope() const { return scope_; }

4
src/mips/lithium-mips.h
View File

@ -2194,7 +2194,7 @@ class LStoreNamedGeneric FINAL : public LTemplateInstruction<0, 3, 0> {
void PrintDataTo(StringStream* stream) OVERRIDE;
Handle<Object> name() const { return hydrogen()->name(); }
StrictMode strict_mode() { return hydrogen()->strict_mode(); }
LanguageMode language_mode() { return hydrogen()->language_mode(); }
};
@ -2251,7 +2251,7 @@ class LStoreKeyedGeneric FINAL : public LTemplateInstruction<0, 4, 0> {
void PrintDataTo(StringStream* stream) OVERRIDE;
StrictMode strict_mode() { return hydrogen()->strict_mode(); }
LanguageMode language_mode() { return hydrogen()->language_mode(); }
};

38
src/mips64/full-codegen-mips64.cc
View File

@ -134,7 +134,7 @@ void FullCodeGenerator::Generate() {
// Sloppy mode functions and builtins need to replace the receiver with the
// global proxy when called as functions (without an explicit receiver
// object).
if (info->strict_mode() == SLOPPY && !info->is_native()) {
if (is_sloppy(info->language_mode()) && !info->is_native()) {
Label ok;
int receiver_offset = info->scope()->num_parameters() * kPointerSize;
__ ld(at, MemOperand(sp, receiver_offset));
@ -268,7 +268,7 @@ void FullCodeGenerator::Generate() {
// The stub will rewrite receiever and parameter count if the previous
// stack frame was an arguments adapter frame.
ArgumentsAccessStub::Type type;
if (strict_mode() == STRICT) {
if (is_strict(language_mode())) {
type = ArgumentsAccessStub::NEW_STRICT;
} else if (function()->has_duplicate_parameters()) {
type = ArgumentsAccessStub::NEW_SLOPPY_SLOW;
@ -1282,7 +1282,7 @@ void FullCodeGenerator::EmitNewClosure(Handle<SharedFunctionInfo> info,
!pretenure &&
scope()->is_function_scope() &&
info->num_literals() == 0) {
FastNewClosureStub stub(isolate(), info->strict_mode(), info->kind());
FastNewClosureStub stub(isolate(), info->language_mode(), info->kind());
__ li(a2, Operand(info));
__ CallStub(&stub);
} else {
@ -2638,7 +2638,7 @@ void FullCodeGenerator::EmitAssignment(Expression* expr) {
__ Pop(StoreDescriptor::ValueRegister(),
StoreDescriptor::ReceiverRegister());
Handle<Code> ic =
CodeFactory::KeyedStoreIC(isolate(), strict_mode()).code();
CodeFactory::KeyedStoreIC(isolate(), language_mode()).code();
CallIC(ic);
break;
}
@ -2704,8 +2704,8 @@ void FullCodeGenerator::EmitVariableAssignment(Variable* var, Token::Value op) {
if (var->IsLookupSlot()) {
// Assignment to var.
__ li(a4, Operand(var->name()));
__ li(a3, Operand(Smi::FromInt(strict_mode())));
// jssp[0] : mode.
__ li(a3, Operand(Smi::FromInt(language_mode())));
// jssp[0] : language mode.
// jssp[8] : name.
// jssp[16] : context.
// jssp[24] : value.
@ -2724,7 +2724,7 @@ void FullCodeGenerator::EmitVariableAssignment(Variable* var, Token::Value op) {
}
EmitStoreToStackLocalOrContextSlot(var, location);
}
} else if (IsSignallingAssignmentToConst(var, op, strict_mode())) {
} else if (IsSignallingAssignmentToConst(var, op, language_mode())) {
__ CallRuntime(Runtime::kThrowConstAssignError, 0);
}
}
@ -2759,8 +2759,8 @@ void FullCodeGenerator::EmitNamedSuperPropertyStore(Property* prop) {
__ Push(key->value());
__ Push(v0);
__ CallRuntime((strict_mode() == STRICT ? Runtime::kStoreToSuper_Strict
: Runtime::kStoreToSuper_Sloppy),
__ CallRuntime((is_strict(language_mode()) ? Runtime::kStoreToSuper_Strict
: Runtime::kStoreToSuper_Sloppy),
4);
}
@ -2772,9 +2772,10 @@ void FullCodeGenerator::EmitKeyedSuperPropertyStore(Property* prop) {
DCHECK(prop != NULL);
__ Push(v0);
__ CallRuntime((strict_mode() == STRICT ? Runtime::kStoreKeyedToSuper_Strict
: Runtime::kStoreKeyedToSuper_Sloppy),
4);
__ CallRuntime(
(is_strict(language_mode()) ? Runtime::kStoreKeyedToSuper_Strict
: Runtime::kStoreKeyedToSuper_Sloppy),
4);
}
@ -2792,7 +2793,8 @@ void FullCodeGenerator::EmitKeyedPropertyAssignment(Assignment* expr) {
__ Pop(StoreDescriptor::ReceiverRegister(), StoreDescriptor::NameRegister());
DCHECK(StoreDescriptor::ValueRegister().is(a0));
Handle<Code> ic = CodeFactory::KeyedStoreIC(isolate(), strict_mode()).code();
Handle<Code> ic =
CodeFactory::KeyedStoreIC(isolate(), language_mode()).code();
CallIC(ic, expr->AssignmentFeedbackId());
PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);
@ -3009,8 +3011,8 @@ void FullCodeGenerator::EmitResolvePossiblyDirectEval(int arg_count) {
int receiver_offset = 2 + info_->scope()->num_parameters();
__ ld(a5, MemOperand(fp, receiver_offset * kPointerSize));
// a4: the strict mode.
__ li(a4, Operand(Smi::FromInt(strict_mode())));
// a4: the language mode.
__ li(a4, Operand(Smi::FromInt(language_mode())));
// a1: the start position of the scope the calls resides in.
__ li(a1, Operand(Smi::FromInt(scope()->start_position())));
@ -4575,7 +4577,7 @@ void FullCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) {
if (property != NULL) {
VisitForStackValue(property->obj());
VisitForStackValue(property->key());
__ li(a1, Operand(Smi::FromInt(strict_mode())));
__ li(a1, Operand(Smi::FromInt(language_mode())));
__ push(a1);
__ InvokeBuiltin(Builtins::DELETE, CALL_FUNCTION);
context()->Plug(v0);
@ -4583,7 +4585,7 @@ void FullCodeGenerator::VisitUnaryOperation(UnaryOperation* expr) {
Variable* var = proxy->var();
// Delete of an unqualified identifier is disallowed in strict mode
// but "delete this" is allowed.
DCHECK(strict_mode() == SLOPPY || var->is_this());
DCHECK(is_sloppy(language_mode()) || var->is_this());
if (var->IsUnallocated()) {
__ ld(a2, GlobalObjectOperand());
__ li(a1, Operand(var->name()));
@ -4906,7 +4908,7 @@ void FullCodeGenerator::VisitCountOperation(CountOperation* expr) {
__ Pop(StoreDescriptor::ReceiverRegister(),
StoreDescriptor::NameRegister());
Handle<Code> ic =
CodeFactory::KeyedStoreIC(isolate(), strict_mode()).code();
CodeFactory::KeyedStoreIC(isolate(), language_mode()).code();
CallIC(ic, expr->CountStoreFeedbackId());
PrepareForBailoutForId(expr->AssignmentId(), TOS_REG);
if (expr->is_postfix()) {

9
src/mips64/lithium-codegen-mips64.cc
View File

@ -117,8 +117,7 @@ bool LCodeGen::GeneratePrologue() {
// Sloppy mode functions and builtins need to replace the receiver with the
// global proxy when called as functions (without an explicit receiver
// object).
if (info_->this_has_uses() &&
info_->strict_mode() == SLOPPY &&
if (info_->this_has_uses() && is_sloppy(info_->language_mode()) &&
!info_->is_native()) {
Label ok;
int receiver_offset = info_->scope()->num_parameters() * kPointerSize;
@ -4283,7 +4282,7 @@ void LCodeGen::DoStoreNamedGeneric(LStoreNamedGeneric* instr) {
DCHECK(ToRegister(instr->value()).is(StoreDescriptor::ValueRegister()));
__ li(StoreDescriptor::NameRegister(), Operand(instr->name()));
Handle<Code> ic = StoreIC::initialize_stub(isolate(), instr->strict_mode());
Handle<Code> ic = StoreIC::initialize_stub(isolate(), instr->language_mode());
CallCode(ic, RelocInfo::CODE_TARGET, instr);
}
@ -4548,7 +4547,7 @@ void LCodeGen::DoStoreKeyedGeneric(LStoreKeyedGeneric* instr) {
DCHECK(ToRegister(instr->value()).is(StoreDescriptor::ValueRegister()));
Handle<Code> ic =
CodeFactory::KeyedStoreIC(isolate(), instr->strict_mode()).code();
CodeFactory::KeyedStoreIC(isolate(), instr->language_mode()).code();
CallCode(ic, RelocInfo::CODE_TARGET, instr);
}
@ -5572,7 +5571,7 @@ void LCodeGen::DoFunctionLiteral(LFunctionLiteral* instr) {
// space for nested functions that don't need literals cloning.
bool pretenure = instr->hydrogen()->pretenure();
if (!pretenure && instr->hydrogen()->has_no_literals()) {
FastNewClosureStub stub(isolate(), instr->hydrogen()->strict_mode(),
FastNewClosureStub stub(isolate(), instr->hydrogen()->language_mode(),
instr->hydrogen()->kind());
__ li(a2, Operand(instr->hydrogen()->shared_info()));
CallCode(stub.GetCode(), RelocInfo::CODE_TARGET, instr);

2
src/mips64/lithium-codegen-mips64.h
View File

@ -144,7 +144,7 @@ class LCodeGen: public LCodeGenBase {
#undef DECLARE_DO
private:
StrictMode strict_mode() const { return info()->strict_mode(); }
LanguageMode language_mode() const { return info()->language_mode(); }
Scope* scope() const { return scope_; }

4
src/mips64/lithium-mips64.h
View File

@ -2177,7 +2177,7 @@ class LStoreNamedGeneric FINAL : public LTemplateInstruction<0, 3, 0> {
void PrintDataTo(StringStream* stream) OVERRIDE;
Handle<Object> name() const { return hydrogen()->name(); }
StrictMode strict_mode() { return hydrogen()->strict_mode(); }
LanguageMode language_mode() { return hydrogen()->language_mode(); }
};
@ -2234,7 +2234,7 @@ class LStoreKeyedGeneric FINAL : public LTemplateInstruction<0, 4, 0> {
void PrintDataTo(StringStream* stream) OVERRIDE;
StrictMode strict_mode() { return hydrogen()->strict_mode(); }
LanguageMode language_mode() { return hydrogen()->language_mode(); }
};