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wrappers.cc
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wrappers.cc
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// Copyright 2024 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/base/small-vector.h"
#include "src/codegen/bailout-reason.h"
#include "src/codegen/interface-descriptors-inl.h"
#include "src/compiler/linkage.h"
#include "src/compiler/turboshaft/index.h"
#include "src/compiler/turboshaft/wasm-assembler-helpers.h"
#include "src/objects/object-list-macros.h"
#include "src/wasm/turboshaft-graph-interface.h"
#include "src/wasm/wasm-engine.h"
#include "src/wasm/wasm-module.h"
#include "src/zone/zone.h"
namespace v8::internal::wasm {
#include "src/compiler/turboshaft/define-assembler-macros.inc"
using compiler::CallDescriptor;
using compiler::Operator;
using compiler::turboshaft::ConditionWithHint;
using compiler::turboshaft::Float32;
using compiler::turboshaft::Float64;
using compiler::turboshaft::Label;
using compiler::turboshaft::LoadOp;
using compiler::turboshaft::MemoryRepresentation;
using TSBlock = compiler::turboshaft::Block;
using compiler::turboshaft::OpEffects;
using compiler::turboshaft::OpIndex;
using compiler::turboshaft::OptionalOpIndex;
using compiler::turboshaft::RegisterRepresentation;
using compiler::turboshaft::StoreOp;
using compiler::turboshaft::TSCallDescriptor;
using compiler::turboshaft::Tuple;
using compiler::turboshaft::V;
using compiler::turboshaft::Variable;
using compiler::turboshaft::Word32;
using compiler::turboshaft::WordPtr;
namespace {
const TSCallDescriptor* GetBuiltinCallDescriptor(Builtin name, Zone* zone,
StubCallMode stub_mode) {
CallInterfaceDescriptor interface_descriptor =
Builtins::CallInterfaceDescriptorFor(name);
CallDescriptor* call_desc = compiler::Linkage::GetStubCallDescriptor(
zone, // zone
interface_descriptor, // descriptor
interface_descriptor.GetStackParameterCount(), // stack parameter count
CallDescriptor::kNoFlags, // flags
compiler::Operator::kNoProperties, // properties
stub_mode); // stub call mode
return TSCallDescriptor::Create(call_desc, compiler::CanThrow::kNo, zone);
}
} // namespace
class WasmWrapperTSGraphBuilder : public WasmGraphBuilderBase {
public:
WasmWrapperTSGraphBuilder(Zone* zone, Assembler& assembler,
const WasmModule* module,
const wasm::FunctionSig* sig,
StubCallMode stub_mode)
: WasmGraphBuilderBase(zone, assembler),
module_(module),
sig_(sig),
stub_mode_(stub_mode) {}
void AbortIfNot(V<Word32> condition, AbortReason abort_reason) {
if (!v8_flags.debug_code) return;
IF_NOT (condition) {
V<Number> message_id =
__ NumberConstant(static_cast<int32_t>(abort_reason));
CallRuntime(__ phase_zone(), Runtime::kAbort, {message_id},
__ NoContextConstant());
}
}
class ModifyThreadInWasmFlagScope {
public:
ModifyThreadInWasmFlagScope(
WasmWrapperTSGraphBuilder* wasm_wrapper_graph_builder, Assembler& asm_)
: wasm_wrapper_graph_builder_(wasm_wrapper_graph_builder) {
if (!trap_handler::IsTrapHandlerEnabled()) return;
thread_in_wasm_flag_address_ =
asm_.Load(asm_.LoadRootRegister(), OptionalOpIndex::Nullopt(),
LoadOp::Kind::RawAligned(), MemoryRepresentation::UintPtr(),
RegisterRepresentation::WordPtr(),
Isolate::thread_in_wasm_flag_address_offset());
wasm_wrapper_graph_builder_->BuildModifyThreadInWasmFlagHelper(
wasm_wrapper_graph_builder_->Asm().phase_zone(),
thread_in_wasm_flag_address_, true);
}
ModifyThreadInWasmFlagScope(const ModifyThreadInWasmFlagScope&) = delete;
~ModifyThreadInWasmFlagScope() {
if (!trap_handler::IsTrapHandlerEnabled()) return;
wasm_wrapper_graph_builder_->BuildModifyThreadInWasmFlagHelper(
wasm_wrapper_graph_builder_->Asm().phase_zone(),
thread_in_wasm_flag_address_, false);
}
private:
WasmWrapperTSGraphBuilder* wasm_wrapper_graph_builder_;
V<WordPtr> thread_in_wasm_flag_address_;
};
V<Smi> LoadExportedFunctionIndexAsSmi(V<Object> exported_function_data) {
return __ Load(exported_function_data,
LoadOp::Kind::TaggedBase().Immutable(),
MemoryRepresentation::TaggedSigned(),
WasmExportedFunctionData::kFunctionIndexOffset);
}
V<Smi> BuildChangeInt32ToSmi(V<Word32> value) {
// With pointer compression, only the lower 32 bits are used.
return V<Smi>::Cast(COMPRESS_POINTERS_BOOL
? __ BitcastWord32ToWord64(__ Word32ShiftLeft(
value, BuildSmiShiftBitsConstant32()))
: __ Word64ShiftLeft(__ ChangeInt32ToInt64(value),
BuildSmiShiftBitsConstant()));
}
V<WordPtr> GetTargetForBuiltinCall(Builtin builtin) {
return WasmGraphBuilderBase::GetTargetForBuiltinCall(builtin, stub_mode_);
}
template <typename Descriptor, typename... Args>
OpIndex CallBuiltin(Builtin name, OpIndex frame_state,
Operator::Properties properties, Args... args) {
auto call_descriptor = compiler::Linkage::GetStubCallDescriptor(
__ graph_zone(), Descriptor(), 0,
frame_state.valid() ? CallDescriptor::kNeedsFrameState
: CallDescriptor::kNoFlags,
Operator::kNoProperties, stub_mode_);
const TSCallDescriptor* ts_call_descriptor = TSCallDescriptor::Create(
call_descriptor, compiler::CanThrow::kNo, __ graph_zone());
V<WordPtr> call_target = GetTargetForBuiltinCall(name);
return __ Call(call_target, frame_state, base::VectorOf({args...}),
ts_call_descriptor);
}
template <typename Descriptor, typename... Args>
OpIndex CallBuiltin(Builtin name, Operator::Properties properties,
Args... args) {
auto call_descriptor = compiler::Linkage::GetStubCallDescriptor(
__ graph_zone(), Descriptor(), 0, CallDescriptor::kNoFlags,
Operator::kNoProperties, stub_mode_);
const TSCallDescriptor* ts_call_descriptor = TSCallDescriptor::Create(
call_descriptor, compiler::CanThrow::kNo, __ graph_zone());
V<WordPtr> call_target = GetTargetForBuiltinCall(name);
return __ Call(call_target, {args...}, ts_call_descriptor);
}
V<Number> BuildChangeInt32ToNumber(V<Word32> value) {
// We expect most integers at runtime to be Smis, so it is important for
// wrapper performance that Smi conversion be inlined.
if (SmiValuesAre32Bits()) {
return BuildChangeInt32ToSmi(value);
}
DCHECK(SmiValuesAre31Bits());
// Double value to test if value can be a Smi, and if so, to convert it.
V<Tuple<Word32, Word32>> add = __ Int32AddCheckOverflow(value, value);
V<Word32> ovf = __ template Projection<1>(add);
Variable result = __ NewVariable(RegisterRepresentation::Tagged());
IF_NOT (UNLIKELY(ovf)) {
// If it didn't overflow, the result is {2 * value} as pointer-sized
// value.
__ SetVariable(result,
__ ChangeInt32ToIntPtr(__ template Projection<0>(add)));
} ELSE{
// Otherwise, call builtin, to convert to a HeapNumber.
V<HeapNumber> call = CallBuiltin<WasmInt32ToHeapNumberDescriptor>(
Builtin::kWasmInt32ToHeapNumber, Operator::kNoProperties, value);
__ SetVariable(result, call);
}
OpIndex merge = __ GetVariable(result);
__ SetVariable(result, OpIndex::Invalid());
return merge;
}
V<Number> BuildChangeFloat32ToNumber(V<Float32> value) {
return CallBuiltin<WasmFloat32ToNumberDescriptor>(
Builtin::kWasmFloat32ToNumber, Operator::kNoProperties, value);
}
V<Number> BuildChangeFloat64ToNumber(V<Float64> value) {
return CallBuiltin<WasmFloat64ToTaggedDescriptor>(
Builtin::kWasmFloat64ToNumber, Operator::kNoProperties, value);
}
V<Object> ToJS(OpIndex ret, ValueType type, V<Context> context) {
switch (type.kind()) {
case wasm::kI32:
return BuildChangeInt32ToNumber(ret);
case wasm::kI64:
return BuildChangeInt64ToBigInt(ret, stub_mode_);
case wasm::kF32:
return BuildChangeFloat32ToNumber(ret);
case wasm::kF64:
return BuildChangeFloat64ToNumber(ret);
case wasm::kRef:
switch (type.heap_representation_non_shared()) {
case wasm::HeapType::kEq:
case wasm::HeapType::kI31:
case wasm::HeapType::kStruct:
case wasm::HeapType::kArray:
case wasm::HeapType::kAny:
case wasm::HeapType::kExtern:
case wasm::HeapType::kString:
case wasm::HeapType::kNone:
case wasm::HeapType::kNoFunc:
case wasm::HeapType::kNoExtern:
case wasm::HeapType::kExn:
case wasm::HeapType::kNoExn:
return ret;
case wasm::HeapType::kBottom:
case wasm::HeapType::kStringViewWtf8:
case wasm::HeapType::kStringViewWtf16:
case wasm::HeapType::kStringViewIter:
UNREACHABLE();
case wasm::HeapType::kFunc:
default:
if (type.heap_representation_non_shared() ==
wasm::HeapType::kFunc ||
module_->has_signature(type.ref_index())) {
// Function reference. Extract the external function.
Variable maybe_external =
__ NewVariable(RegisterRepresentation::Tagged());
V<WasmInternalFunction> internal =
V<WasmInternalFunction>::Cast(__ LoadTrustedPointerField(
ret, LoadOp::Kind::TaggedBase(),
kWasmInternalFunctionIndirectPointerTag,
WasmFuncRef::kTrustedInternalOffset));
__ SetVariable(maybe_external,
__ Load(internal, LoadOp::Kind::TaggedBase(),
MemoryRepresentation::TaggedPointer(),
WasmInternalFunction::kExternalOffset));
IF (__ TaggedEqual(__ GetVariable(maybe_external),
LOAD_ROOT(UndefinedValue))) {
__ SetVariable(
maybe_external,
CallBuiltin<WasmInternalFunctionCreateExternalDescriptor>(
Builtin::kWasmInternalFunctionCreateExternal,
Operator::kNoProperties, internal, context));
}
OpIndex merge = __ GetVariable(maybe_external);
__ SetVariable(maybe_external, OpIndex::Invalid());
return merge;
} else {
return ret;
}
}
case wasm::kRefNull:
switch (type.heap_representation_non_shared()) {
case wasm::HeapType::kExtern:
case wasm::HeapType::kNoExtern:
case wasm::HeapType::kExn:
case wasm::HeapType::kNoExn:
return ret;
case wasm::HeapType::kNone:
case wasm::HeapType::kNoFunc:
return LOAD_ROOT(NullValue);
case wasm::HeapType::kEq:
case wasm::HeapType::kStruct:
case wasm::HeapType::kArray:
case wasm::HeapType::kString:
case wasm::HeapType::kI31:
case wasm::HeapType::kAny: {
Variable result = __ NewVariable(RegisterRepresentation::Tagged());
IF_NOT (__ TaggedEqual(ret, LOAD_ROOT(WasmNull))) {
__ SetVariable(result, ret);
} ELSE{
__ SetVariable(result, LOAD_ROOT(NullValue));
}
OpIndex merge = __ GetVariable(result);
__ SetVariable(result, OpIndex::Invalid());
return merge;
}
case wasm::HeapType::kFunc:
default: {
if (type.heap_representation_non_shared() ==
wasm::HeapType::kFunc ||
module_->has_signature(type.ref_index())) {
Variable result =
__ NewVariable(RegisterRepresentation::Tagged());
IF (__ TaggedEqual(ret, LOAD_ROOT(WasmNull))) {
__ SetVariable(result, LOAD_ROOT(NullValue));
} ELSE{
V<WasmInternalFunction> internal =
V<WasmInternalFunction>::Cast(__ LoadTrustedPointerField(
ret, LoadOp::Kind::TaggedBase(),
kWasmInternalFunctionIndirectPointerTag,
WasmFuncRef::kTrustedInternalOffset));
V<Object> maybe_external =
__ Load(internal, LoadOp::Kind::TaggedBase(),
MemoryRepresentation::AnyTagged(),
WasmInternalFunction::kExternalOffset);
IF (__ TaggedEqual(maybe_external, LOAD_ROOT(UndefinedValue))) {
V<Object> from_builtin =
CallBuiltin<WasmInternalFunctionCreateExternalDescriptor>(
Builtin::kWasmInternalFunctionCreateExternal,
Operator::kNoProperties, internal, context);
__ SetVariable(result, from_builtin);
} ELSE{
__ SetVariable(result, maybe_external);
}
}
OpIndex merge = __ GetVariable(result);
__ SetVariable(result, OpIndex::Invalid());
return merge;
} else {
Variable result =
__ NewVariable(RegisterRepresentation::Tagged());
IF (__ TaggedEqual(ret, LOAD_ROOT(WasmNull))) {
__ SetVariable(result, LOAD_ROOT(NullValue));
} ELSE{
__ SetVariable(result, ret);
}
OpIndex merge = __ GetVariable(result);
__ SetVariable(result, OpIndex::Invalid());
return merge;
}
}
}
case wasm::kRtt:
case wasm::kI8:
case wasm::kI16:
case wasm::kS128:
case wasm::kVoid:
case wasm::kBottom:
// If this is reached, then IsJSCompatibleSignature() is too permissive.
UNREACHABLE();
}
}
// Generate a call to the AllocateJSArray builtin.
V<JSArray> BuildCallAllocateJSArray(V<Number> array_length,
V<Object> context) {
// Since we don't check that args will fit in an array,
// we make sure this is true based on statically known limits.
static_assert(wasm::kV8MaxWasmFunctionReturns <=
JSArray::kInitialMaxFastElementArray);
return CallBuiltin<WasmAllocateJSArrayDescriptor>(
Builtin::kWasmAllocateJSArray, Operator::kEliminatable, array_length,
context);
}
void BuildCallWasmFromWrapper(Zone* zone, const FunctionSig* sig,
V<WordPtr> callee,
V<HeapObject> implicit_first_arg,
base::SmallVector<OpIndex, 16> args,
base::SmallVector<OpIndex, 1>& returns) {
const TSCallDescriptor* descriptor = TSCallDescriptor::Create(
compiler::GetWasmCallDescriptor(__ graph_zone(), sig),
compiler::CanThrow::kYes, __ graph_zone());
args[0] = implicit_first_arg;
OpIndex call = __ Call(callee, OpIndex::Invalid(), base::VectorOf(args),
descriptor, OpEffects().CanCallAnything());
if (sig->return_count() == 1) {
returns[0] = call;
} else if (sig->return_count() > 1) {
for (uint32_t i = 0; i < sig->return_count(); i++) {
wasm::ValueType type = sig->GetReturn(i);
returns[i] = __ Projection(call, i, RepresentationFor(type));
}
}
}
OpIndex BuildCallAndReturn(bool is_import, V<Context> js_context,
V<HeapObject> function_data,
base::SmallVector<OpIndex, 16> args,
bool do_conversion, bool set_in_wasm_flag) {
const int rets_count = static_cast<int>(sig_->return_count());
base::SmallVector<OpIndex, 1> rets(rets_count);
// Set the ThreadInWasm flag before we do the actual call.
{
base::Optional<ModifyThreadInWasmFlagScope>
modify_thread_in_wasm_flag_builder;
if (set_in_wasm_flag) {
modify_thread_in_wasm_flag_builder.emplace(this, Asm());
}
V<HeapObject> instance_object =
__ Load(function_data, LoadOp::Kind::TaggedBase(),
MemoryRepresentation::TaggedPointer(),
WasmExportedFunctionData::kInstanceOffset);
V<WasmTrustedInstanceData> instance_data =
LoadTrustedDataFromInstanceObject(instance_object);
if (is_import) {
// Call to an imported function.
// Load function index from {WasmExportedFunctionData}.
V<Word32> function_index = BuildChangeSmiToInt32(
LoadExportedFunctionIndexAsSmi(function_data));
auto [target, ref] =
BuildImportedFunctionTargetAndRef(function_index, instance_data);
BuildCallWasmFromWrapper(__ phase_zone(), sig_, target, ref, args,
rets);
} else {
// Call to a wasm function defined in this module.
// The (cached) call target is the jump table slot for that function.
V<WasmFuncRef> func_ref = V<WasmFuncRef>::Cast(__ LoadTaggedField(
function_data, WasmFunctionData::kFuncRefOffset));
V<WasmInternalFunction> internal = V<WasmInternalFunction>::Cast(
__ LoadTrustedPointerField(func_ref, LoadOp::Kind::TaggedBase(),
kWasmInternalFunctionIndirectPointerTag,
WasmFuncRef::kTrustedInternalOffset));
V<WordPtr> callee = __ Load(internal, LoadOp::Kind::TaggedBase(),
MemoryRepresentation::UintPtr(),
WasmInternalFunction::kCallTargetOffset);
BuildCallWasmFromWrapper(__ phase_zone(), sig_, callee, instance_data,
args, rets);
}
}
V<Object> jsval;
if (sig_->return_count() == 0) {
jsval = LOAD_ROOT(UndefinedValue);
} else if (sig_->return_count() == 1) {
jsval = do_conversion ? ToJS(rets[0], sig_->GetReturn(), js_context)
: rets[0];
} else {
int32_t return_count = static_cast<int32_t>(sig_->return_count());
V<Smi> size = __ SmiConstant(Smi::FromInt(return_count));
jsval = BuildCallAllocateJSArray(size, js_context);
V<FixedArray> fixed_array = __ Load(jsval, LoadOp::Kind::TaggedBase(),
MemoryRepresentation::TaggedPointer(),
JSObject::kElementsOffset);
for (int i = 0; i < return_count; ++i) {
V<Object> value = ToJS(rets[i], sig_->GetReturn(i), js_context);
__ StoreFixedArrayElement(fixed_array, i, value,
compiler::kFullWriteBarrier);
}
}
return jsval;
}
void BuildJSToWasmWrapper(
bool is_import, bool do_conversion = true,
compiler::turboshaft::OptionalOpIndex frame_state =
compiler::turboshaft::OptionalOpIndex::Nullopt(),
bool set_in_wasm_flag = true) {
const int wasm_param_count = static_cast<int>(sig_->parameter_count());
__ Bind(__ NewBlock());
// Create the js_closure and js_context parameters.
V<JSFunction> js_closure =
__ Parameter(compiler::Linkage::kJSCallClosureParamIndex,
RegisterRepresentation::Tagged());
V<Context> js_context = __ Parameter(
compiler::Linkage::GetJSCallContextParamIndex(wasm_param_count + 1),
RegisterRepresentation::Tagged());
V<SharedFunctionInfo> shared =
__ Load(js_closure, LoadOp::Kind::TaggedBase(),
MemoryRepresentation::TaggedPointer(),
JSFunction::kSharedFunctionInfoOffset);
V<HeapObject> function_data =
__ Load(shared, LoadOp::Kind::TaggedBase(),
MemoryRepresentation::TaggedPointer(),
SharedFunctionInfo::kFunctionDataOffset);
if (!wasm::IsJSCompatibleSignature(sig_)) {
// Throw a TypeError. Use the js_context of the calling javascript
// function (passed as a parameter), such that the generated code is
// js_context independent.
CallRuntime(__ phase_zone(), Runtime::kWasmThrowJSTypeError, {},
js_context);
__ Unreachable();
return;
}
const int args_count = wasm_param_count + 1; // +1 for wasm_code.
// Check whether the signature of the function allows for a fast
// transformation (if any params exist that need transformation).
// Create a fast transformation path, only if it does.
bool include_fast_path =
do_conversion && wasm_param_count > 0 && QualifiesForFastTransform();
// Prepare Param() nodes. Param() nodes can only be created once,
// so we need to use the same nodes along all possible transformation paths.
base::SmallVector<OpIndex, 16> params(args_count);
for (int i = 0; i < wasm_param_count; ++i) {
params[i + 1] = __ Parameter(i + 1, RegisterRepresentation::Tagged());
}
Label<Object> done(&Asm());
V<Object> jsval;
if (include_fast_path) {
TSBlock* slow_path = __ NewBlock();
// Check if the params received on runtime can be actually transformed
// using the fast transformation. When a param that cannot be transformed
// fast is encountered, skip checking the rest and fall back to the slow
// path.
for (int i = 0; i < wasm_param_count; ++i) {
CanTransformFast(params[i + 1], sig_->GetParam(i), slow_path);
}
// Convert JS parameters to wasm numbers using the fast transformation
// and build the call.
base::SmallVector<OpIndex, 16> args(args_count);
for (int i = 0; i < wasm_param_count; ++i) {
OpIndex wasm_param = FromJSFast(params[i + 1], sig_->GetParam(i));
args[i + 1] = wasm_param;
}
jsval = BuildCallAndReturn(is_import, js_context, function_data, args,
do_conversion, set_in_wasm_flag);
GOTO(done, jsval);
__ Bind(slow_path);
}
// Convert JS parameters to wasm numbers using the default transformation
// and build the call.
base::SmallVector<OpIndex, 16> args(args_count);
for (int i = 0; i < wasm_param_count; ++i) {
if (do_conversion) {
args[i + 1] = FromJS(params[i + 1], js_context, sig_->GetParam(i),
module_, frame_state);
} else {
OpIndex wasm_param = params[i + 1];
// For Float32 parameters
// we set UseInfo::CheckedNumberOrOddballAsFloat64 in
// simplified-lowering and we need to add here a conversion from Float64
// to Float32.
if (sig_->GetParam(i).kind() == wasm::kF32) {
wasm_param = __ TruncateFloat64ToFloat32(wasm_param);
}
args[i + 1] = wasm_param;
}
}
jsval = BuildCallAndReturn(is_import, js_context, function_data, args,
do_conversion, set_in_wasm_flag);
// If both the default and a fast transformation paths are present,
// get the return value based on the path used.
if (include_fast_path) {
GOTO(done, jsval);
BIND(done, result);
__ Return(result);
} else {
__ Return(jsval);
}
}
void BuildWasmToJSWrapper(wasm::ImportCallKind kind, int expected_arity,
wasm::Suspend suspend, const WasmModule* module) {
int suspender_count = suspend == kSuspendWithSuspender ? 1 : 0;
int wasm_count = static_cast<int>(sig_->parameter_count()) - suspender_count;
__ Bind(__ NewBlock());
base::SmallVector<OpIndex, 16> wasm_params(wasm_count);
OpIndex ref = __ Parameter(0, RegisterRepresentation::Tagged());
V<HeapObject> suspender =
suspender_count == 1 ? __ Parameter(1, RegisterRepresentation::Tagged())
: OpIndex::Invalid();
for (int i = 0; i < wasm_count; ++i) {
RegisterRepresentation rep =
RepresentationFor(sig_->GetParam(i + suspender_count));
wasm_params[i] = (__ Parameter(1 + suspender_count + i, rep));
}
V<Context> native_context = __ Load(
ref, LoadOp::Kind::TaggedBase(), MemoryRepresentation::TaggedPointer(),
WasmApiFunctionRef::kNativeContextOffset);
if (kind == wasm::ImportCallKind::kRuntimeTypeError) {
// =======================================================================
// === Runtime TypeError =================================================
// =======================================================================
CallRuntime(zone_, Runtime::kWasmThrowJSTypeError, {}, native_context);
__ Unreachable();
return;
}
V<Undefined> undefined_node = LOAD_ROOT(UndefinedValue);
int pushed_count = std::max(expected_arity, wasm_count);
// 4 extra arguments: receiver, new target, arg count and context.
base::SmallVector<OpIndex, 16> args(pushed_count + 4);
// Position of the first wasm argument in the JS arguments.
int pos = kind == ImportCallKind::kUseCallBuiltin ? 3 : 1;
// If {suspender_count} is 1, {wasm_count} includes the suspender argument,
// which is dropped in {AddArgumentNodes}.
pos = AddArgumentNodes(base::VectorOf(args), pos, wasm_params, sig_,
native_context, suspender_count);
for (int i = wasm_count; i < expected_arity; ++i) {
args[pos++] = undefined_node;
}
V<JSFunction> callable_node = __ Load(ref, LoadOp::Kind::TaggedBase(),
MemoryRepresentation::TaggedPointer(),
WasmApiFunctionRef::kCallableOffset);
BuildModifyThreadInWasmFlag(__ phase_zone(), false);
OpIndex call = OpIndex::Invalid();
switch (kind) {
// =======================================================================
// === JS Functions ======================================================
// =======================================================================
case wasm::ImportCallKind::kJSFunctionArityMatch:
DCHECK_EQ(expected_arity, wasm_count);
[[fallthrough]];
case wasm::ImportCallKind::kJSFunctionArityMismatch: {
auto call_descriptor = compiler::Linkage::GetJSCallDescriptor(
__ graph_zone(), false, pushed_count + 1, CallDescriptor::kNoFlags);
const TSCallDescriptor* ts_call_descriptor = TSCallDescriptor::Create(
call_descriptor, compiler::CanThrow::kYes, __ graph_zone());
// Determine receiver at runtime.
args[0] =
BuildReceiverNode(callable_node, native_context, undefined_node);
DCHECK_EQ(pos, pushed_count + 1);
args[pos++] = undefined_node; // new target
args[pos++] =
__ Word32Constant(JSParameterCount(wasm_count)); // argument count
args[pos++] = LoadContextFromJSFunction(callable_node);
call = BuildCallOnCentralStack(callable_node, args, ts_call_descriptor,
callable_node);
break;
}
// =======================================================================
// === General case of unknown callable ==================================
// =======================================================================
case wasm::ImportCallKind::kUseCallBuiltin: {
DCHECK_EQ(expected_arity, wasm_count);
OpIndex target = GetBuiltinPointerTarget(Builtin::kCall_ReceiverIsAny);
args[0] = callable_node;
args[1] =
__ Word32Constant(JSParameterCount(wasm_count)); // argument count
args[2] = undefined_node; // receiver
auto call_descriptor = compiler::Linkage::GetStubCallDescriptor(
__ graph_zone(), CallTrampolineDescriptor{}, wasm_count + 1,
CallDescriptor::kNoFlags, Operator::kNoProperties,
StubCallMode::kCallBuiltinPointer);
const TSCallDescriptor* ts_call_descriptor = TSCallDescriptor::Create(
call_descriptor, compiler::CanThrow::kYes, __ graph_zone());
// The native_context is sufficient here, because all kind of callables
// which depend on the context provide their own context. The context
// here is only needed if the target is a constructor to throw a
// TypeError, if the target is a native function, or if the target is a
// callable JSObject, which can only be constructed by the runtime.
args[pos++] = native_context;
call = BuildCallOnCentralStack(target, args, ts_call_descriptor,
callable_node);
break;
}
default:
UNIMPLEMENTED();
}
DCHECK(call.valid());
if (suspend == kSuspend) {
call = BuildSuspend(call, LOAD_ROOT(ActiveSuspender), ref);
} else if (suspend == kSuspendWithSuspender) {
call = BuildSuspend(call, suspender, ref);
}
// Convert the return value(s) back.
if (sig_->return_count() <= 1) {
OpIndex val =
sig_->return_count() == 0
? __ Word32Constant(0)
: FromJS(call, native_context, sig_->GetReturn(), module);
BuildModifyThreadInWasmFlag(__ phase_zone(), true);
__ Return(val);
} else {
V<FixedArray> fixed_array =
BuildMultiReturnFixedArrayFromIterable(call, native_context);
base::SmallVector<OpIndex, 8> wasm_values(sig_->return_count());
for (unsigned i = 0; i < sig_->return_count(); ++i) {
wasm_values[i] = FromJS(__ LoadFixedArrayElement(fixed_array, i),
native_context, sig_->GetReturn(i), module);
}
BuildModifyThreadInWasmFlag(__ phase_zone(), true);
__ Return(__ Word32Constant(0), base::VectorOf(wasm_values));
}
}
void BuildCapiCallWrapper(const WasmModule* module) {
__ Bind(__ NewBlock());
base::SmallVector<OpIndex, 8> incoming_params;
// Instance.
incoming_params.push_back(
__ Parameter(0, RegisterRepresentation::Tagged()));
// Wasm parameters.
for (int i = 0; i < static_cast<int>(sig_->parameter_count()); ++i) {
incoming_params.push_back(
__ Parameter(i + 1, RepresentationFor(sig_->GetParam(i))));
}
// Store arguments on our stack, then align the stack for calling to C.
int param_bytes = 0;
for (wasm::ValueType type : sig_->parameters()) {
param_bytes += type.value_kind_size();
}
int return_bytes = 0;
for (wasm::ValueType type : sig_->returns()) {
return_bytes += type.value_kind_size();
}
int stack_slot_bytes = std::max(param_bytes, return_bytes);
OpIndex values = stack_slot_bytes == 0
? __ IntPtrConstant(0)
: __ StackSlot(stack_slot_bytes, kDoubleAlignment);
int offset = 0;
for (size_t i = 0; i < sig_->parameter_count(); ++i) {
wasm::ValueType type = sig_->GetParam(i);
// Start from the parameter with index 1 to drop the instance_node.
// TODO(jkummerow): When a values is a reference type, we should pass it
// in a GC-safe way, not just as a raw pointer.
SafeStore(offset, type, values, incoming_params[i + 1]);
offset += type.value_kind_size();
}
V<Object> function_node = __ LoadTaggedField(
incoming_params[0], WasmApiFunctionRef::kCallableOffset);
V<HeapObject> shared = LoadSharedFunctionInfo(function_node);
V<WasmFunctionData> function_data = V<WasmFunctionData>::Cast(
__ LoadTaggedField(shared, SharedFunctionInfo::kFunctionDataOffset));
V<Object> host_data_foreign = __ LoadTaggedField(
function_data, WasmCapiFunctionData::kEmbedderDataOffset);
BuildModifyThreadInWasmFlag(__ phase_zone(), false);
OpIndex isolate_root = __ LoadRootRegister();
OpIndex fp_value = __ FramePointer();
__ Store(isolate_root, fp_value, StoreOp::Kind::RawAligned(),
MemoryRepresentation::UintPtr(), compiler::kNoWriteBarrier,
Isolate::c_entry_fp_offset());
V<WordPtr> call_target =
BuildLoadCallTargetFromExportedFunctionData(function_data);
// Parameters: Address host_data_foreign, Address arguments.
auto host_sig =
FixedSizeSignature<MachineType>::Returns(MachineType::Pointer())
.Params(MachineType::AnyTagged(), MachineType::Pointer());
OpIndex return_value =
CallC(&host_sig, call_target, {host_data_foreign, values});
BuildModifyThreadInWasmFlag(__ phase_zone(), true);
IF_NOT (__ WordPtrEqual(return_value, __ IntPtrConstant(0))) {
WasmRethrowExplicitContextDescriptor interface_descriptor;
auto call_descriptor = compiler::Linkage::GetStubCallDescriptor(
__ graph_zone(), interface_descriptor,
interface_descriptor.GetStackParameterCount(),
CallDescriptor::kNoFlags, Operator::kNoProperties,
StubCallMode::kCallWasmRuntimeStub);
const TSCallDescriptor* ts_call_descriptor = TSCallDescriptor::Create(
call_descriptor, compiler::CanThrow::kYes, __ graph_zone());
OpIndex call_target = __ RelocatableWasmBuiltinCallTarget(
Builtin::kWasmRethrowExplicitContext);
V<Context> context =
__ Load(incoming_params[0], LoadOp::Kind::TaggedBase(),
MemoryRepresentation::TaggedPointer(),
WasmApiFunctionRef::kNativeContextOffset);
__ Call(call_target, {return_value, context}, ts_call_descriptor);
__ Unreachable();
}
DCHECK_LT(sig_->return_count(), wasm::kV8MaxWasmFunctionReturns);
size_t return_count = sig_->return_count();
if (return_count == 0) {
__ Return(__ Word32Constant(0));
} else {
base::SmallVector<OpIndex, 8> returns(return_count);
offset = 0;
for (size_t i = 0; i < return_count; ++i) {
wasm::ValueType type = sig_->GetReturn(i);
OpIndex val = SafeLoad(values, offset, type);
returns[i] = val;
offset += type.value_kind_size();
}
__ Return(__ Word32Constant(0), base::VectorOf(returns));
}
}
V<Word32> BuildSmiShiftBitsConstant() {
return __ Word32Constant(kSmiShiftSize + kSmiTagSize);
}
V<Word32> BuildSmiShiftBitsConstant32() {
return __ Word32Constant(kSmiShiftSize + kSmiTagSize);
}
V<Word32> BuildChangeSmiToInt32(OpIndex value) {
return COMPRESS_POINTERS_BOOL
? __ Word32ShiftRightArithmetic(value,
BuildSmiShiftBitsConstant32())
: __
TruncateWordPtrToWord32(__ WordPtrShiftRightArithmetic(
value, BuildSmiShiftBitsConstant()));
}
V<Float64> HeapNumberToFloat64(V<HeapNumber> input) {
return __ template LoadField<Float64>(
input, compiler::AccessBuilder::ForHeapNumberValue());
}
OpIndex FromJSFast(OpIndex input, wasm::ValueType type) {
switch (type.kind()) {
case wasm::kI32:
return BuildChangeSmiToInt32(input);
case wasm::kF32: {
Variable result = __ NewVariable(RegisterRepresentation::Float32());
IF (__ IsSmi(input)) {
__ SetVariable(result, __ ChangeInt32ToFloat32(__ UntagSmi(input)));
} ELSE {
__ SetVariable(
result, __ TruncateFloat64ToFloat32(HeapNumberToFloat64(input)));
}
OpIndex merge = __ GetVariable(result);
__ SetVariable(result, OpIndex::Invalid());
return merge;
}
case wasm::kF64: {
Variable result = __ NewVariable(RegisterRepresentation::Float64());
IF (__ IsSmi(input)) {
__ SetVariable(result, __ ChangeInt32ToFloat64(__ UntagSmi(input)));
} ELSE{
__ SetVariable(result, HeapNumberToFloat64(input));
}
OpIndex merge = __ GetVariable(result);
__ SetVariable(result, OpIndex::Invalid());
return merge;
}
case wasm::kRef:
case wasm::kRefNull:
case wasm::kI64:
case wasm::kRtt:
case wasm::kS128:
case wasm::kI8:
case wasm::kI16:
case wasm::kBottom:
case wasm::kVoid:
UNREACHABLE();
}
}
OpIndex LoadInstanceType(V<Map> map) {
return __ Load(map, LoadOp::Kind::TaggedBase().Immutable(),
MemoryRepresentation::Uint16(), Map::kInstanceTypeOffset);
}
OpIndex BuildCheckString(OpIndex input, OpIndex js_context, ValueType type) {
auto done = __ NewBlock();
auto type_error = __ NewBlock();
Variable result = __ NewVariable(RegisterRepresentation::Tagged());
__ SetVariable(result, LOAD_ROOT(WasmNull));
__ GotoIf(__ IsSmi(input), type_error, BranchHint::kFalse);
if (type.is_nullable()) {
auto not_null = __ NewBlock();
__ GotoIfNot(__ TaggedEqual(input, LOAD_ROOT(NullValue)), not_null);
__ Goto(done);
__ Bind(not_null);
}
V<Map> map = LoadMap(input);
OpIndex instance_type = LoadInstanceType(map);
OpIndex check = __ Uint32LessThan(instance_type,
__ Word32Constant(FIRST_NONSTRING_TYPE));
__ SetVariable(result, input);
__ GotoIf(check, done, BranchHint::kTrue);
__ Goto(type_error);
__ Bind(type_error);
CallRuntime(__ phase_zone(), Runtime::kWasmThrowJSTypeError, {},
js_context);
__ Unreachable();
__ Bind(done);
OpIndex merge = __ GetVariable(result);
__ SetVariable(result, OpIndex::Invalid());
return merge;
}
V<Float64> BuildChangeTaggedToFloat64(
OpIndex value, OpIndex context,
compiler::turboshaft::OptionalOpIndex frame_state) {
OpIndex call = frame_state.valid()
? CallBuiltin<WasmTaggedToFloat64Descriptor>(
Builtin::kWasmTaggedToFloat64, frame_state.value(),
Operator::kNoProperties, value, context)
: CallBuiltin<WasmTaggedToFloat64Descriptor>(
Builtin::kWasmTaggedToFloat64,
Operator::kNoProperties, value, context);
// The source position here is needed for asm.js, see the comment on the
// source position of the call to JavaScript in the wasm-to-js wrapper.
__ output_graph().source_positions()[call] = SourcePosition(1);
return call;
}
OpIndex BuildChangeTaggedToInt32(
OpIndex value, OpIndex context,
compiler::turboshaft::OptionalOpIndex frame_state) {
// We expect most integers at runtime to be Smis, so it is important for
// wrapper performance that Smi conversion be inlined.
Variable result = __ NewVariable(RegisterRepresentation::Word32());
IF (__ IsSmi(value)) {
__ SetVariable(result, BuildChangeSmiToInt32(value));
} ELSE{
OpIndex call =
frame_state.valid()
? CallBuiltin<WasmTaggedNonSmiToInt32Descriptor>(
Builtin::kWasmTaggedNonSmiToInt32, frame_state.value(),
Operator::kNoProperties, value, context)
: CallBuiltin<WasmTaggedNonSmiToInt32Descriptor>(
Builtin::kWasmTaggedNonSmiToInt32, Operator::kNoProperties,
value, context);
__ SetVariable(result, call);
// The source position here is needed for asm.js, see the comment on the
// source position of the call to JavaScript in the wasm-to-js wrapper.
__ output_graph().source_positions()[call] = SourcePosition(1);
}
OpIndex merge = __ GetVariable(result);
__ SetVariable(result, OpIndex::Invalid());
return merge;
}
CallDescriptor* GetBigIntToI64CallDescriptor(bool needs_frame_state) {
return wasm::GetWasmEngine()->call_descriptors()->GetBigIntToI64Descriptor(
stub_mode_, needs_frame_state);
}
OpIndex BuildChangeBigIntToInt64(
OpIndex input, OpIndex context,
compiler::turboshaft::OptionalOpIndex frame_state) {
OpIndex target;
if (Is64()) {
target = GetTargetForBuiltinCall(Builtin::kBigIntToI64);
} else {
// On 32-bit platforms we already set the target to the
// BigIntToI32Pair builtin here, so that we don't have to replace the
// target in the int64-lowering.
target = GetTargetForBuiltinCall(Builtin::kBigIntToI32Pair);
}
CallDescriptor* call_descriptor =
GetBigIntToI64CallDescriptor(frame_state.valid());
const TSCallDescriptor* ts_call_descriptor = TSCallDescriptor::Create(
call_descriptor, compiler::CanThrow::kNo, __ graph_zone());
return frame_state.valid()
? __ Call(target, frame_state.value(),
base::VectorOf({input, context}), ts_call_descriptor)
: __ Call(target, {input, context}, ts_call_descriptor);
}
OpIndex FromJS(OpIndex input, OpIndex context, ValueType type,
const WasmModule* module, OptionalOpIndex frame_state = {}) {
switch (type.kind()) {
case wasm::kRef:
case wasm::kRefNull: {
switch (type.heap_representation_non_shared()) {
// TODO(14034): Add more fast paths?
case wasm::HeapType::kExtern:
case wasm::HeapType::kNoExtern:
case wasm::HeapType::kExn:
case wasm::HeapType::kNoExn:
if (type.kind() == wasm::kRef) {
IF (UNLIKELY(__ TaggedEqual(input, LOAD_ROOT(NullValue)))) {
CallRuntime(__ phase_zone(), Runtime::kWasmThrowJSTypeError, {},
context);
__ Unreachable();
}
}
return input;
case wasm::HeapType::kString:
return BuildCheckString(input, context, type);
case wasm::HeapType::kNone:
case wasm::HeapType::kNoFunc:
case wasm::HeapType::kI31:
case wasm::HeapType::kAny:
case wasm::HeapType::kFunc:
case wasm::HeapType::kStruct:
case wasm::HeapType::kArray:
case wasm::HeapType::kEq:
default: {
// Make sure ValueType fits in a Smi.
static_assert(wasm::ValueType::kLastUsedBit + 1 <= kSmiValueSize);
if (type.has_index()) {
DCHECK_NOT_NULL(module);
uint32_t canonical_index =
module->isorecursive_canonical_type_ids[type.ref_index()];
type = wasm::ValueType::RefMaybeNull(canonical_index,
type.nullability());
}
std::initializer_list<const OpIndex> inputs = {
input, __ IntPtrConstant(
IntToSmi(static_cast<int>(type.raw_bit_field())))};
return CallRuntime(__ phase_zone(), Runtime::kWasmJSToWasmObject,
inputs, context);
}