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[builtins] Some refactoring on the builtin mechanism.

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Allow to pass new.target (in addition to target) to C++ builtins, and
remove some obsolete/dangerous code from the C++ builtins.

R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/1491883002

Cr-Commit-Position: refs/heads/master@{#32505}
This commit is contained in:
bmeurer 2015-12-02 04:01:22 -08:00 committed by Commit bot
parent d4fc4a8cad
commit 4013a8df54
10 changed files with 256 additions and 210 deletions
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23
src/arm/builtins-arm.cc
View File

@ -22,7 +22,8 @@ void Builtins::Generate_Adaptor(MacroAssembler* masm,
BuiltinExtraArguments extra_args) {
// ----------- S t a t e -------------
// -- r0 : number of arguments excluding receiver
// -- r1 : called function
// -- r1 : target
// -- r3 : new.target
// -- sp[0] : last argument
// -- ...
// -- sp[4 * (argc - 1)] : first argument
@ -32,11 +33,21 @@ void Builtins::Generate_Adaptor(MacroAssembler* masm,
// Insert extra arguments.
int num_extra_args = 0;
if (extra_args == NEEDS_CALLED_FUNCTION) {
num_extra_args = 1;
__ push(r1);
} else {
DCHECK(extra_args == NO_EXTRA_ARGUMENTS);
switch (extra_args) {
case BuiltinExtraArguments::kTarget:
__ Push(r1);
++num_extra_args;
break;
case BuiltinExtraArguments::kNewTarget:
__ Push(r3);
++num_extra_args;
break;
case BuiltinExtraArguments::kTargetAndNewTarget:
__ Push(r1, r3);
num_extra_args += 2;
break;
case BuiltinExtraArguments::kNone:
break;
}
// JumpToExternalReference expects r0 to contain the number of arguments

21
src/arm64/builtins-arm64.cc
View File

@ -38,7 +38,8 @@ void Builtins::Generate_Adaptor(MacroAssembler* masm,
BuiltinExtraArguments extra_args) {
// ----------- S t a t e -------------
// -- x0 : number of arguments excluding receiver
// -- x1 : called function
// -- x1 : target
// -- x3 : new target
// -- sp[0] : last argument
// -- ...
// -- sp[4 * (argc - 1)] : first argument
@ -48,11 +49,21 @@ void Builtins::Generate_Adaptor(MacroAssembler* masm,
// Insert extra arguments.
int num_extra_args = 0;
if (extra_args == NEEDS_CALLED_FUNCTION) {
num_extra_args = 1;
switch (extra_args) {
case BuiltinExtraArguments::kTarget:
__ Push(x1);
} else {
DCHECK(extra_args == NO_EXTRA_ARGUMENTS);
++num_extra_args;
break;
case BuiltinExtraArguments::kNewTarget:
__ Push(x3);
++num_extra_args;
break;
case BuiltinExtraArguments::kTargetAndNewTarget:
__ Push(x1, x3);
num_extra_args += 2;
break;
case BuiltinExtraArguments::kNone:
break;
}
// JumpToExternalReference expects x0 to contain the number of arguments

159
src/builtins.cc
View File

@ -31,7 +31,10 @@ template <BuiltinExtraArguments extra_args>
class BuiltinArguments : public Arguments {
public:
BuiltinArguments(int length, Object** arguments)
: Arguments(length, arguments) { }
: Arguments(length, arguments) {
// Check we have at least the receiver.
DCHECK_LE(1, this->length());
}
Object*& operator[] (int index) {
DCHECK(index < length());
@ -47,47 +50,64 @@ class BuiltinArguments : public Arguments {
return Arguments::at<Object>(0);
}
Handle<JSFunction> called_function() {
STATIC_ASSERT(extra_args == NEEDS_CALLED_FUNCTION);
return Arguments::at<JSFunction>(Arguments::length() - 1);
}
Handle<JSFunction> target();
Handle<HeapObject> new_target();
// Gets the total number of arguments including the receiver (but
// excluding extra arguments).
int length() const {
STATIC_ASSERT(extra_args == NO_EXTRA_ARGUMENTS);
return Arguments::length();
}
#ifdef DEBUG
void Verify() {
// Check we have at least the receiver.
DCHECK(Arguments::length() >= 1);
}
#endif
int length() const;
};
// Specialize BuiltinArguments for the called function extra argument.
// Specialize BuiltinArguments for the extra arguments.
template <>
int BuiltinArguments<NEEDS_CALLED_FUNCTION>::length() const {
int BuiltinArguments<BuiltinExtraArguments::kNone>::length() const {
return Arguments::length();
}
template <>
int BuiltinArguments<BuiltinExtraArguments::kTarget>::length() const {
return Arguments::length() - 1;
}
#ifdef DEBUG
template <>
void BuiltinArguments<NEEDS_CALLED_FUNCTION>::Verify() {
// Check we have at least the receiver and the called function.
DCHECK(Arguments::length() >= 2);
// Make sure cast to JSFunction succeeds.
called_function();
Handle<JSFunction> BuiltinArguments<BuiltinExtraArguments::kTarget>::target() {
return Arguments::at<JSFunction>(Arguments::length() - 1);
}
template <>
int BuiltinArguments<BuiltinExtraArguments::kNewTarget>::length() const {
return Arguments::length() - 1;
}
template <>
Handle<HeapObject>
BuiltinArguments<BuiltinExtraArguments::kNewTarget>::new_target() {
return Arguments::at<HeapObject>(Arguments::length() - 1);
}
template <>
int BuiltinArguments<BuiltinExtraArguments::kTargetAndNewTarget>::length()
const {
return Arguments::length() - 2;
}
template <>
Handle<JSFunction>
BuiltinArguments<BuiltinExtraArguments::kTargetAndNewTarget>::target() {
return Arguments::at<JSFunction>(Arguments::length() - 2);
}
template <>
Handle<HeapObject>
BuiltinArguments<BuiltinExtraArguments::kTargetAndNewTarget>::new_target() {
return Arguments::at<HeapObject>(Arguments::length() - 1);
}
#endif
#define DEF_ARG_TYPE(name, spec) \
typedef BuiltinArguments<spec> name##ArgumentsType;
typedef BuiltinArguments<BuiltinExtraArguments::spec> name##ArgumentsType;
BUILTIN_LIST_C(DEF_ARG_TYPE)
#undef DEF_ARG_TYPE
@ -105,63 +125,17 @@ BUILTIN_LIST_C(DEF_ARG_TYPE)
// In the body of the builtin function the arguments can be accessed
// through the BuiltinArguments object args.
#ifdef DEBUG
#define BUILTIN(name) \
MUST_USE_RESULT static Object* Builtin_Impl_##name( \
name##ArgumentsType args, Isolate* isolate); \
MUST_USE_RESULT static Object* Builtin_##name( \
int args_length, Object** args_object, Isolate* isolate) { \
name##ArgumentsType args(args_length, args_object); \
args.Verify(); \
return Builtin_Impl_##name(args, isolate); \
} \
MUST_USE_RESULT static Object* Builtin_Impl_##name( \
name##ArgumentsType args, Isolate* isolate)
#else // For release mode.
#define BUILTIN(name) \
static Object* Builtin_impl##name( \
name##ArgumentsType args, Isolate* isolate); \
static Object* Builtin_##name( \
int args_length, Object** args_object, Isolate* isolate) { \
name##ArgumentsType args(args_length, args_object); \
return Builtin_impl##name(args, isolate); \
} \
static Object* Builtin_impl##name( \
name##ArgumentsType args, Isolate* isolate)
#endif
#ifdef DEBUG
inline bool CalledAsConstructor(Isolate* isolate) {
// Calculate the result using a full stack frame iterator and check
// that the state of the stack is as we assume it to be in the
// code below.
StackFrameIterator it(isolate);
DCHECK(it.frame()->is_exit());
it.Advance();
StackFrame* frame = it.frame();
bool reference_result = frame->is_construct();
Address fp = Isolate::c_entry_fp(isolate->thread_local_top());
// Because we know fp points to an exit frame we can use the relevant
// part of ExitFrame::ComputeCallerState directly.
const int kCallerOffset = ExitFrameConstants::kCallerFPOffset;
Address caller_fp = Memory::Address_at(fp + kCallerOffset);
// This inlines the part of StackFrame::ComputeType that grabs the
// type of the current frame. Note that StackFrame::ComputeType
// has been specialized for each architecture so if any one of them
// changes this code has to be changed as well.
const int kMarkerOffset = StandardFrameConstants::kMarkerOffset;
const Smi* kConstructMarker = Smi::FromInt(StackFrame::CONSTRUCT);
Object* marker = Memory::Object_at(caller_fp + kMarkerOffset);
bool result = (marker == kConstructMarker);
DCHECK_EQ(result, reference_result);
return result;
}
#endif
// ----------------------------------------------------------------------------
@ -306,7 +280,7 @@ inline MaybeHandle<FixedArrayBase> EnsureJSArrayWithWritableFastElements(
MUST_USE_RESULT static Object* CallJsIntrinsic(
Isolate* isolate, Handle<JSFunction> function,
BuiltinArguments<NO_EXTRA_ARGUMENTS> args) {
BuiltinArguments<BuiltinExtraArguments::kNone> args) {
HandleScope handleScope(isolate);
int argc = args.length() - 1;
ScopedVector<Handle<Object> > argv(argc);
@ -1764,7 +1738,7 @@ BUILTIN(SymbolConstructor_ConstructStub) {
HandleScope scope(isolate);
// The ConstructStub is executed in the context of the caller, so we need
// to enter the callee context first before raising an exception.
isolate->set_context(args.called_function()->context());
isolate->set_context(args.target()->context());
THROW_NEW_ERROR_RETURN_FAILURE(
isolate, NewTypeError(MessageTemplate::kNotConstructor,
isolate->factory()->Symbol_string()));
@ -1794,11 +1768,13 @@ BUILTIN(RestrictedStrictArgumentsPropertiesThrower) {
//
namespace {
template <bool is_construct>
MUST_USE_RESULT static MaybeHandle<Object> HandleApiCallHelper(
Isolate* isolate, BuiltinArguments<NEEDS_CALLED_FUNCTION>& args) {
MUST_USE_RESULT MaybeHandle<Object> HandleApiCallHelper(
Isolate* isolate, BuiltinArguments<BuiltinExtraArguments::kTarget> args) {
HandleScope scope(isolate);
Handle<JSFunction> function = args.called_function();
Handle<JSFunction> function = args.target();
// TODO(ishell): turn this back to a DCHECK.
CHECK(function->shared()->IsApiFunction());
@ -1873,10 +1849,11 @@ MUST_USE_RESULT static MaybeHandle<Object> HandleApiCallHelper(
return scope.CloseAndEscape(args.receiver());
}
} // namespace
BUILTIN(HandleApiCall) {
HandleScope scope(isolate);
DCHECK(!CalledAsConstructor(isolate));
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result,
HandleApiCallHelper<false>(isolate, args));
@ -1886,7 +1863,6 @@ BUILTIN(HandleApiCall) {
BUILTIN(HandleApiCallConstruct) {
HandleScope scope(isolate);
DCHECK(CalledAsConstructor(isolate));
Handle<Object> result;
ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, result,
HandleApiCallHelper<true>(isolate, args));
@ -1924,11 +1900,12 @@ Handle<Code> Builtins::Call(ConvertReceiverMode mode) {
namespace {
class RelocatableArguments : public BuiltinArguments<NEEDS_CALLED_FUNCTION>,
class RelocatableArguments
: public BuiltinArguments<BuiltinExtraArguments::kTarget>,
public Relocatable {
public:
RelocatableArguments(Isolate* isolate, int length, Object** arguments)
: BuiltinArguments<NEEDS_CALLED_FUNCTION>(length, arguments),
: BuiltinArguments<BuiltinExtraArguments::kTarget>(length, arguments),
Relocatable(isolate) {}
virtual inline void IterateInstance(ObjectVisitor* v) {
@ -1978,12 +1955,8 @@ MaybeHandle<Object> Builtins::InvokeApiFunction(Handle<JSFunction> function,
// API. The object can be called as either a constructor (using new) or just as
// a function (without new).
MUST_USE_RESULT static Object* HandleApiCallAsFunctionOrConstructor(
Isolate* isolate,
bool is_construct_call,
BuiltinArguments<NO_EXTRA_ARGUMENTS> args) {
// Non-functions are never called as constructors. Even if this is an object
// called as a constructor the delegate call is not a construct call.
DCHECK(!CalledAsConstructor(isolate));
Isolate* isolate, bool is_construct_call,
BuiltinArguments<BuiltinExtraArguments::kNone> args) {
Heap* heap = isolate->heap();
Handle<Object> receiver = args.receiver();
@ -2240,7 +2213,7 @@ void Builtins::InitBuiltinFunctionTable() {
functions[builtin_count].s_name = NULL;
functions[builtin_count].name = builtin_count;
functions[builtin_count].flags = static_cast<Code::Flags>(0);
functions[builtin_count].extra_args = NO_EXTRA_ARGUMENTS;
functions[builtin_count].extra_args = BuiltinExtraArguments::kNone;
#define DEF_FUNCTION_PTR_C(aname, aextra_args) \
functions->generator = FUNCTION_ADDR(Generate_Adaptor); \
@ -2248,7 +2221,7 @@ void Builtins::InitBuiltinFunctionTable() {
functions->s_name = #aname; \
functions->name = c_##aname; \
functions->flags = Code::ComputeFlags(Code::BUILTIN); \
functions->extra_args = aextra_args; \
functions->extra_args = BuiltinExtraArguments::aextra_args; \
++functions;
#define DEF_FUNCTION_PTR_A(aname, kind, state, extra) \
@ -2256,10 +2229,8 @@ void Builtins::InitBuiltinFunctionTable() {
functions->c_code = NULL; \
functions->s_name = #aname; \
functions->name = k##aname; \
functions->flags = Code::ComputeFlags(Code::kind, \
state, \
extra); \
functions->extra_args = NO_EXTRA_ARGUMENTS; \
functions->flags = Code::ComputeFlags(Code::kind, state, extra); \
functions->extra_args = BuiltinExtraArguments::kNone; \
++functions;
#define DEF_FUNCTION_PTR_H(aname, kind) \
@ -2268,7 +2239,7 @@ void Builtins::InitBuiltinFunctionTable() {
functions->s_name = #aname; \
functions->name = k##aname; \
functions->flags = Code::ComputeHandlerFlags(Code::kind); \
functions->extra_args = NO_EXTRA_ARGUMENTS; \
functions->extra_args = BuiltinExtraArguments::kNone; \
++functions;
BUILTIN_LIST_C(DEF_FUNCTION_PTR_C)

71
src/builtins.h
View File

@ -5,17 +5,24 @@
#ifndef V8_BUILTINS_H_
#define V8_BUILTINS_H_
#include "src/base/flags.h"
#include "src/handles.h"
namespace v8 {
namespace internal {
// Specifies extra arguments required by a C++ builtin.
enum BuiltinExtraArguments {
NO_EXTRA_ARGUMENTS = 0,
NEEDS_CALLED_FUNCTION = 1
enum class BuiltinExtraArguments : uint8_t {
kNone = 0u,
kTarget = 1u << 0,
kNewTarget = 1u << 1,
kTargetAndNewTarget = kTarget | kNewTarget
};
inline bool operator&(BuiltinExtraArguments lhs, BuiltinExtraArguments rhs) {
return static_cast<uint8_t>(lhs) & static_cast<uint8_t>(rhs);
}
#define CODE_AGE_LIST_WITH_ARG(V, A) \
V(Quadragenarian, A) \
@ -45,42 +52,42 @@ enum BuiltinExtraArguments {
// Define list of builtins implemented in C++.
#define BUILTIN_LIST_C(V) \
V(Illegal, NO_EXTRA_ARGUMENTS) \
V(Illegal, kNone) \
\
V(EmptyFunction, NO_EXTRA_ARGUMENTS) \
V(EmptyFunction, kNone) \
\
V(ArrayPush, NO_EXTRA_ARGUMENTS) \
V(ArrayPop, NO_EXTRA_ARGUMENTS) \
V(ArrayShift, NO_EXTRA_ARGUMENTS) \
V(ArrayUnshift, NO_EXTRA_ARGUMENTS) \
V(ArraySlice, NO_EXTRA_ARGUMENTS) \
V(ArraySplice, NO_EXTRA_ARGUMENTS) \
V(ArrayConcat, NO_EXTRA_ARGUMENTS) \
V(ArrayPush, kNone) \
V(ArrayPop, kNone) \
V(ArrayShift, kNone) \
V(ArrayUnshift, kNone) \
V(ArraySlice, kNone) \
V(ArraySplice, kNone) \
V(ArrayConcat, kNone) \
\
V(DateToPrimitive, NO_EXTRA_ARGUMENTS) \
V(DateToPrimitive, kNone) \
\
V(ReflectDefineProperty, NO_EXTRA_ARGUMENTS) \
V(ReflectDeleteProperty, NO_EXTRA_ARGUMENTS) \
V(ReflectGet, NO_EXTRA_ARGUMENTS) \
V(ReflectGetOwnPropertyDescriptor, NO_EXTRA_ARGUMENTS) \
V(ReflectGetPrototypeOf, NO_EXTRA_ARGUMENTS) \
V(ReflectHas, NO_EXTRA_ARGUMENTS) \
V(ReflectIsExtensible, NO_EXTRA_ARGUMENTS) \
V(ReflectOwnKeys, NO_EXTRA_ARGUMENTS) \
V(ReflectPreventExtensions, NO_EXTRA_ARGUMENTS) \
V(ReflectSet, NO_EXTRA_ARGUMENTS) \
V(ReflectSetPrototypeOf, NO_EXTRA_ARGUMENTS) \
V(ReflectDefineProperty, kNone) \
V(ReflectDeleteProperty, kNone) \
V(ReflectGet, kNone) \
V(ReflectGetOwnPropertyDescriptor, kNone) \
V(ReflectGetPrototypeOf, kNone) \
V(ReflectHas, kNone) \
V(ReflectIsExtensible, kNone) \
V(ReflectOwnKeys, kNone) \
V(ReflectPreventExtensions, kNone) \
V(ReflectSet, kNone) \
V(ReflectSetPrototypeOf, kNone) \
\
V(SymbolConstructor, NO_EXTRA_ARGUMENTS) \
V(SymbolConstructor_ConstructStub, NEEDS_CALLED_FUNCTION) \
V(SymbolConstructor, kNone) \
V(SymbolConstructor_ConstructStub, kTarget) \
\
V(HandleApiCall, NEEDS_CALLED_FUNCTION) \
V(HandleApiCallConstruct, NEEDS_CALLED_FUNCTION) \
V(HandleApiCallAsFunction, NO_EXTRA_ARGUMENTS) \
V(HandleApiCallAsConstructor, NO_EXTRA_ARGUMENTS) \
V(HandleApiCall, kTarget) \
V(HandleApiCallConstruct, kTarget) \
V(HandleApiCallAsFunction, kNone) \
V(HandleApiCallAsConstructor, kNone) \
\
V(RestrictedFunctionPropertiesThrower, NO_EXTRA_ARGUMENTS) \
V(RestrictedStrictArgumentsPropertiesThrower, NO_EXTRA_ARGUMENTS)
V(RestrictedFunctionPropertiesThrower, kNone) \
V(RestrictedStrictArgumentsPropertiesThrower, kNone)
// Define list of builtins implemented in assembly.
#define BUILTIN_LIST_A(V) \

22
src/ia32/builtins-ia32.cc
View File

@ -22,7 +22,8 @@ void Builtins::Generate_Adaptor(MacroAssembler* masm,
BuiltinExtraArguments extra_args) {
// ----------- S t a t e -------------
// -- eax : number of arguments excluding receiver
// -- edi : called function
// -- edi : target
// -- edx : new.target
// -- esp[0] : return address
// -- esp[4] : last argument
// -- ...
@ -33,14 +34,17 @@ void Builtins::Generate_Adaptor(MacroAssembler* masm,
// Insert extra arguments.
int num_extra_args = 0;
if (extra_args == NEEDS_CALLED_FUNCTION) {
num_extra_args = 1;
Register scratch = ebx;
__ pop(scratch); // Save return address.
__ push(edi);
__ push(scratch); // Restore return address.
} else {
DCHECK(extra_args == NO_EXTRA_ARGUMENTS);
if (extra_args != BuiltinExtraArguments::kNone) {
__ PopReturnAddressTo(ecx);
if (extra_args & BuiltinExtraArguments::kTarget) {
++num_extra_args;
__ Push(edi);
}
if (extra_args & BuiltinExtraArguments::kNewTarget) {
++num_extra_args;
__ Push(edx);
}
__ PushReturnAddressFrom(ecx);
}
// JumpToExternalReference expects eax to contain the number of arguments

23
src/mips/builtins-mips.cc
View File

@ -23,7 +23,8 @@ void Builtins::Generate_Adaptor(MacroAssembler* masm,
BuiltinExtraArguments extra_args) {
// ----------- S t a t e -------------
// -- a0 : number of arguments excluding receiver
// -- a1 : called function
// -- a1 : target
// -- a3 : new.target
// -- sp[0] : last argument
// -- ...
// -- sp[4 * (argc - 1)] : first argument
@ -33,11 +34,21 @@ void Builtins::Generate_Adaptor(MacroAssembler* masm,
// Insert extra arguments.
int num_extra_args = 0;
if (extra_args == NEEDS_CALLED_FUNCTION) {
num_extra_args = 1;
__ push(a1);
} else {
DCHECK(extra_args == NO_EXTRA_ARGUMENTS);
switch (extra_args) {
case BuiltinExtraArguments::kTarget:
__ Push(a1);
++num_extra_args;
break;
case BuiltinExtraArguments::kNewTarget:
__ Push(a3);
++num_extra_args;
break;
case BuiltinExtraArguments::kTargetAndNewTarget:
__ Push(a1, a3);
num_extra_args += 2;
break;
case BuiltinExtraArguments::kNone:
break;
}
// JumpToExternalReference expects a0 to contain the number of arguments

23
src/mips64/builtins-mips64.cc
View File

@ -22,7 +22,8 @@ void Builtins::Generate_Adaptor(MacroAssembler* masm,
BuiltinExtraArguments extra_args) {
// ----------- S t a t e -------------
// -- a0 : number of arguments excluding receiver
// -- a1 : called function
// -- a1 : target
// -- a3 : new.target
// -- sp[0] : last argument
// -- ...
// -- sp[8 * (argc - 1)] : first argument
@ -32,11 +33,21 @@ void Builtins::Generate_Adaptor(MacroAssembler* masm,
// Insert extra arguments.
int num_extra_args = 0;
if (extra_args == NEEDS_CALLED_FUNCTION) {
num_extra_args = 1;
__ push(a1);
} else {
DCHECK(extra_args == NO_EXTRA_ARGUMENTS);
switch (extra_args) {
case BuiltinExtraArguments::kTarget:
__ Push(a1);
++num_extra_args;
break;
case BuiltinExtraArguments::kNewTarget:
__ Push(a3);
++num_extra_args;
break;
case BuiltinExtraArguments::kTargetAndNewTarget:
__ Push(a1, a3);
num_extra_args += 2;
break;
case BuiltinExtraArguments::kNone:
break;
}
// JumpToExternalReference expects a0 to contain the number of arguments

23
src/ppc/builtins-ppc.cc
View File

@ -21,7 +21,8 @@ void Builtins::Generate_Adaptor(MacroAssembler* masm, CFunctionId id,
BuiltinExtraArguments extra_args) {
// ----------- S t a t e -------------
// -- r3 : number of arguments excluding receiver
// -- r4 : called function
// -- r4 : target
// -- r6 : new.target
// -- sp[0] : last argument
// -- ...
// -- sp[4 * (argc - 1)] : first argument
@ -31,11 +32,21 @@ void Builtins::Generate_Adaptor(MacroAssembler* masm, CFunctionId id,
// Insert extra arguments.
int num_extra_args = 0;
if (extra_args == NEEDS_CALLED_FUNCTION) {
num_extra_args = 1;
__ push(r4);
} else {
DCHECK(extra_args == NO_EXTRA_ARGUMENTS);
switch (extra_args) {
case BuiltinExtraArguments::kTarget:
__ Push(r4);
++num_extra_args;
break;
case BuiltinExtraArguments::kNewTarget:
__ Push(r6);
++num_extra_args;
break;
case BuiltinExtraArguments::kTargetAndNewTarget:
__ Push(r4, r6);
num_extra_args += 2;
break;
case BuiltinExtraArguments::kNone:
break;
}
// JumpToExternalReference expects r3 to contain the number of arguments

15
src/x64/builtins-x64.cc
View File

@ -21,7 +21,8 @@ void Builtins::Generate_Adaptor(MacroAssembler* masm,
BuiltinExtraArguments extra_args) {
// ----------- S t a t e -------------
// -- rax : number of arguments excluding receiver
// -- rdi : called function
// -- rdi : target
// -- rdx : new.target
// -- rsp[0] : return address
// -- rsp[8] : last argument
// -- ...
@ -32,13 +33,17 @@ void Builtins::Generate_Adaptor(MacroAssembler* masm,
// Insert extra arguments.
int num_extra_args = 0;
if (extra_args == NEEDS_CALLED_FUNCTION) {
num_extra_args = 1;
if (extra_args != BuiltinExtraArguments::kNone) {
__ PopReturnAddressTo(kScratchRegister);
if (extra_args & BuiltinExtraArguments::kTarget) {
++num_extra_args;
__ Push(rdi);
}
if (extra_args & BuiltinExtraArguments::kNewTarget) {
++num_extra_args;
__ Push(rdx);
}
__ PushReturnAddressFrom(kScratchRegister);
} else {
DCHECK(extra_args == NO_EXTRA_ARGUMENTS);
}
// JumpToExternalReference expects rax to contain the number of arguments

22
src/x87/builtins-x87.cc
View File

@ -22,7 +22,8 @@ void Builtins::Generate_Adaptor(MacroAssembler* masm,
BuiltinExtraArguments extra_args) {
// ----------- S t a t e -------------
// -- eax : number of arguments excluding receiver
// -- edi : called function
// -- edi : target
// -- edx : new.target
// -- esp[0] : return address
// -- esp[4] : last argument
// -- ...
@ -33,14 +34,17 @@ void Builtins::Generate_Adaptor(MacroAssembler* masm,
// Insert extra arguments.
int num_extra_args = 0;
if (extra_args == NEEDS_CALLED_FUNCTION) {
num_extra_args = 1;
Register scratch = ebx;
__ pop(scratch); // Save return address.
__ push(edi);
__ push(scratch); // Restore return address.
} else {
DCHECK(extra_args == NO_EXTRA_ARGUMENTS);
if (extra_args != BuiltinExtraArguments::kNone) {
__ PopReturnAddressTo(ecx);
if (extra_args & BuiltinExtraArguments::kTarget) {
++num_extra_args;
__ Push(edi);
}
if (extra_args & BuiltinExtraArguments::kNewTarget) {
++num_extra_args;
__ Push(edx);
}
__ PushReturnAddressFrom(ecx);
}
// JumpToExternalReference expects eax to contain the number of arguments