#pragma once
#include "CodeBlock.h"
#include "CodeSpecializationKind.h"
#include "DirectArguments.h"
#include "ExceptionHelpers.h"
#include "FunctionCodeBlock.h"
#include "JSImmutableButterfly.h"
#include "ScopedArguments.h"
#include "SlowPathReturnType.h"
#include "StackAlignment.h"
#include "VMInlines.h"
#include <wtf/StdLibExtras.h>
namespace JSC {
namespace CommonSlowPaths {
ALWAYS_INLINE int numberOfExtraSlots(int argumentCountIncludingThis)
{
int frameSize = argumentCountIncludingThis + CallFrame::headerSizeInRegisters;
int alignedFrameSize = WTF::roundUpToMultipleOf(stackAlignmentRegisters(), frameSize);
return alignedFrameSize - frameSize;
}
ALWAYS_INLINE int numberOfStackPaddingSlots(CodeBlock* codeBlock, int argumentCountIncludingThis)
{
if (argumentCountIncludingThis >= codeBlock->numParameters())
return 0;
int alignedFrameSize = WTF::roundUpToMultipleOf(stackAlignmentRegisters(), argumentCountIncludingThis + CallFrame::headerSizeInRegisters);
int alignedFrameSizeForParameters = WTF::roundUpToMultipleOf(stackAlignmentRegisters(), codeBlock->numParameters() + CallFrame::headerSizeInRegisters);
return alignedFrameSizeForParameters - alignedFrameSize;
}
ALWAYS_INLINE int numberOfStackPaddingSlotsWithExtraSlots(CodeBlock* codeBlock, int argumentCountIncludingThis)
{
if (argumentCountIncludingThis >= codeBlock->numParameters())
return 0;
return numberOfStackPaddingSlots(codeBlock, argumentCountIncludingThis) + numberOfExtraSlots(argumentCountIncludingThis);
}
ALWAYS_INLINE CodeBlock* codeBlockFromCallFrameCallee(CallFrame* callFrame, CodeSpecializationKind kind)
{
JSFunction* callee = jsCast<JSFunction*>(callFrame->jsCallee());
ASSERT(!callee->isHostFunction());
return callee->jsExecutable()->codeBlockFor(kind);
}
ALWAYS_INLINE int arityCheckFor(VM& vm, CallFrame* callFrame, CodeSpecializationKind kind)
{
CodeBlock* newCodeBlock = codeBlockFromCallFrameCallee(callFrame, kind);
ASSERT(callFrame->argumentCountIncludingThis() < static_cast<unsigned>(newCodeBlock->numParameters()));
int padding = numberOfStackPaddingSlotsWithExtraSlots(newCodeBlock, callFrame->argumentCountIncludingThis());
Register* newStack = callFrame->registers() - WTF::roundUpToMultipleOf(stackAlignmentRegisters(), padding);
if (UNLIKELY(!vm.ensureStackCapacityFor(newStack)))
return -1;
return padding;
}
inline bool opInByVal(JSGlobalObject* globalObject, JSValue baseVal, JSValue propName, ArrayProfile* arrayProfile = nullptr)
{
VM& vm = getVM(globalObject);
auto scope = DECLARE_THROW_SCOPE(vm);
if (!baseVal.isObject()) {
throwException(globalObject, scope, createInvalidInParameterError(globalObject, baseVal));
return false;
}
JSObject* baseObj = asObject(baseVal);
if (arrayProfile)
arrayProfile->observeStructure(baseObj->structure(vm));
uint32_t i;
if (propName.getUInt32(i)) {
if (arrayProfile)
arrayProfile->observeIndexedRead(vm, baseObj, i);
RELEASE_AND_RETURN(scope, baseObj->hasProperty(globalObject, i));
}
auto property = propName.toPropertyKey(globalObject);
RETURN_IF_EXCEPTION(scope, false);
RELEASE_AND_RETURN(scope, baseObj->hasProperty(globalObject, property));
}
inline bool canAccessArgumentIndexQuickly(JSObject& object, uint32_t index)
{
switch (object.type()) {
case DirectArgumentsType: {
DirectArguments* directArguments = jsCast<DirectArguments*>(&object);
if (directArguments->isMappedArgumentInDFG(index))
return true;
break;
}
case ScopedArgumentsType: {
ScopedArguments* scopedArguments = jsCast<ScopedArguments*>(&object);
if (scopedArguments->isMappedArgumentInDFG(index))
return true;
break;
}
default:
break;
}
return false;
}
ALWAYS_INLINE Structure* originalStructureBeforePut(VM& vm, JSValue value)
{
if (!value.isCell())
return nullptr;
if (value.asCell()->type() == PureForwardingProxyType)
return jsCast<JSProxy*>(value)->target()->structure(vm);
return value.asCell()->structure(vm);
}
static ALWAYS_INLINE void putDirectWithReify(VM& vm, JSGlobalObject* globalObject, JSObject* baseObject, PropertyName propertyName, JSValue value, PutPropertySlot& slot, Structure** result = nullptr)
{
auto scope = DECLARE_THROW_SCOPE(vm);
if (baseObject->inherits<JSFunction>(vm)) {
jsCast<JSFunction*>(baseObject)->reifyLazyPropertyIfNeeded(vm, globalObject, propertyName);
RETURN_IF_EXCEPTION(scope, void());
}
if (result)
*result = originalStructureBeforePut(vm, baseObject);
scope.release();
baseObject->putDirect(vm, propertyName, value, slot);
}
static ALWAYS_INLINE void putDirectAccessorWithReify(VM& vm, JSGlobalObject* globalObject, JSObject* baseObject, PropertyName propertyName, GetterSetter* accessor, unsigned attribute)
{
auto scope = DECLARE_THROW_SCOPE(vm);
if (baseObject->inherits<JSFunction>(vm)) {
jsCast<JSFunction*>(baseObject)->reifyLazyPropertyIfNeeded(vm, globalObject, propertyName);
RETURN_IF_EXCEPTION(scope, void());
}
scope.release();
baseObject->putDirectAccessor(globalObject, propertyName, accessor, attribute);
}
inline JSArray* allocateNewArrayBuffer(VM& vm, Structure* structure, JSImmutableButterfly* immutableButterfly)
{
JSGlobalObject* globalObject = structure->globalObject();
Structure* originalStructure = globalObject->originalArrayStructureForIndexingType(immutableButterfly->indexingMode());
ASSERT(originalStructure->indexingMode() == immutableButterfly->indexingMode());
ASSERT(isCopyOnWrite(immutableButterfly->indexingMode()));
ASSERT(!structure->outOfLineCapacity());
JSArray* result = JSArray::createWithButterfly(vm, nullptr, originalStructure, immutableButterfly->toButterfly());
if (UNLIKELY(originalStructure != structure)) {
ASSERT(hasSlowPutArrayStorage(structure->indexingMode()));
ASSERT(globalObject->isHavingABadTime());
result->switchToSlowPutArrayStorage(vm);
ASSERT(result->butterfly() != immutableButterfly->toButterfly());
ASSERT(!result->butterfly()->arrayStorage()->m_sparseMap.get());
ASSERT(result->structureID() == structure->id());
}
return result;
}
}
class CallFrame;
struct Instruction;
#define SLOW_PATH
#define SLOW_PATH_DECL(name) \
extern "C" SlowPathReturnType SLOW_PATH name(CallFrame* callFrame, const Instruction* pc)
#define SLOW_PATH_HIDDEN_DECL(name) \
SLOW_PATH_DECL(name) WTF_INTERNAL
SLOW_PATH_HIDDEN_DECL(slow_path_call_arityCheck);
SLOW_PATH_HIDDEN_DECL(slow_path_construct_arityCheck);
SLOW_PATH_HIDDEN_DECL(slow_path_create_direct_arguments);
SLOW_PATH_HIDDEN_DECL(slow_path_create_scoped_arguments);
SLOW_PATH_HIDDEN_DECL(slow_path_create_cloned_arguments);
SLOW_PATH_HIDDEN_DECL(slow_path_create_arguments_butterfly);
SLOW_PATH_HIDDEN_DECL(slow_path_create_this);
SLOW_PATH_HIDDEN_DECL(slow_path_enter);
SLOW_PATH_HIDDEN_DECL(slow_path_get_callee);
SLOW_PATH_HIDDEN_DECL(slow_path_to_this);
SLOW_PATH_HIDDEN_DECL(slow_path_throw_tdz_error);
SLOW_PATH_HIDDEN_DECL(slow_path_check_tdz);
SLOW_PATH_HIDDEN_DECL(slow_path_throw_strict_mode_readonly_property_write_error);
SLOW_PATH_HIDDEN_DECL(slow_path_not);
SLOW_PATH_HIDDEN_DECL(slow_path_eq);
SLOW_PATH_HIDDEN_DECL(slow_path_neq);
SLOW_PATH_HIDDEN_DECL(slow_path_stricteq);
SLOW_PATH_HIDDEN_DECL(slow_path_nstricteq);
SLOW_PATH_HIDDEN_DECL(slow_path_less);
SLOW_PATH_HIDDEN_DECL(slow_path_lesseq);
SLOW_PATH_HIDDEN_DECL(slow_path_greater);
SLOW_PATH_HIDDEN_DECL(slow_path_greatereq);
SLOW_PATH_HIDDEN_DECL(slow_path_inc);
SLOW_PATH_HIDDEN_DECL(slow_path_dec);
SLOW_PATH_HIDDEN_DECL(slow_path_to_number);
SLOW_PATH_HIDDEN_DECL(slow_path_to_numeric);
SLOW_PATH_HIDDEN_DECL(slow_path_to_string);
SLOW_PATH_HIDDEN_DECL(slow_path_to_object);
SLOW_PATH_HIDDEN_DECL(slow_path_negate);
SLOW_PATH_HIDDEN_DECL(slow_path_add);
SLOW_PATH_HIDDEN_DECL(slow_path_mul);
SLOW_PATH_HIDDEN_DECL(slow_path_sub);
SLOW_PATH_HIDDEN_DECL(slow_path_div);
SLOW_PATH_HIDDEN_DECL(slow_path_mod);
SLOW_PATH_HIDDEN_DECL(slow_path_pow);
SLOW_PATH_HIDDEN_DECL(slow_path_lshift);
SLOW_PATH_HIDDEN_DECL(slow_path_rshift);
SLOW_PATH_HIDDEN_DECL(slow_path_urshift);
SLOW_PATH_HIDDEN_DECL(slow_path_unsigned);
SLOW_PATH_HIDDEN_DECL(slow_path_bitnot);
SLOW_PATH_HIDDEN_DECL(slow_path_bitand);
SLOW_PATH_HIDDEN_DECL(slow_path_bitor);
SLOW_PATH_HIDDEN_DECL(slow_path_bitxor);
SLOW_PATH_HIDDEN_DECL(slow_path_typeof);
SLOW_PATH_HIDDEN_DECL(slow_path_typeof_is_object);
SLOW_PATH_HIDDEN_DECL(slow_path_typeof_is_function);
SLOW_PATH_HIDDEN_DECL(slow_path_is_object);
SLOW_PATH_HIDDEN_DECL(slow_path_is_callable);
SLOW_PATH_HIDDEN_DECL(slow_path_is_constructor);
SLOW_PATH_HIDDEN_DECL(slow_path_in_by_id);
SLOW_PATH_HIDDEN_DECL(slow_path_in_by_val);
SLOW_PATH_HIDDEN_DECL(slow_path_del_by_val);
SLOW_PATH_HIDDEN_DECL(slow_path_strcat);
SLOW_PATH_HIDDEN_DECL(slow_path_to_primitive);
SLOW_PATH_HIDDEN_DECL(slow_path_to_property_key);
SLOW_PATH_HIDDEN_DECL(slow_path_get_enumerable_length);
SLOW_PATH_HIDDEN_DECL(slow_path_has_generic_property);
SLOW_PATH_HIDDEN_DECL(slow_path_has_structure_property);
SLOW_PATH_HIDDEN_DECL(slow_path_has_own_structure_property);
SLOW_PATH_HIDDEN_DECL(slow_path_in_structure_property);
SLOW_PATH_HIDDEN_DECL(slow_path_has_indexed_property);
SLOW_PATH_HIDDEN_DECL(slow_path_get_direct_pname);
SLOW_PATH_HIDDEN_DECL(slow_path_get_property_enumerator);
SLOW_PATH_HIDDEN_DECL(slow_path_enumerator_structure_pname);
SLOW_PATH_HIDDEN_DECL(slow_path_enumerator_generic_pname);
SLOW_PATH_HIDDEN_DECL(slow_path_to_index_string);
SLOW_PATH_HIDDEN_DECL(slow_path_profile_type_clear_log);
SLOW_PATH_HIDDEN_DECL(slow_path_unreachable);
SLOW_PATH_HIDDEN_DECL(slow_path_create_lexical_environment);
SLOW_PATH_HIDDEN_DECL(slow_path_push_with_scope);
SLOW_PATH_HIDDEN_DECL(slow_path_resolve_scope);
SLOW_PATH_HIDDEN_DECL(slow_path_is_var_scope);
SLOW_PATH_HIDDEN_DECL(slow_path_resolve_scope_for_hoisting_func_decl_in_eval);
SLOW_PATH_HIDDEN_DECL(slow_path_create_promise);
SLOW_PATH_HIDDEN_DECL(slow_path_create_generator);
SLOW_PATH_HIDDEN_DECL(slow_path_create_async_generator);
SLOW_PATH_HIDDEN_DECL(slow_path_create_rest);
SLOW_PATH_HIDDEN_DECL(slow_path_get_by_id_with_this);
SLOW_PATH_HIDDEN_DECL(slow_path_get_by_val_with_this);
SLOW_PATH_HIDDEN_DECL(slow_path_get_private_name);
SLOW_PATH_HIDDEN_DECL(slow_path_get_prototype_of);
SLOW_PATH_HIDDEN_DECL(slow_path_put_by_id_with_this);
SLOW_PATH_HIDDEN_DECL(slow_path_put_by_val_with_this);
SLOW_PATH_HIDDEN_DECL(slow_path_define_data_property);
SLOW_PATH_HIDDEN_DECL(slow_path_define_accessor_property);
SLOW_PATH_HIDDEN_DECL(slow_path_throw_static_error);
SLOW_PATH_HIDDEN_DECL(slow_path_new_promise);
SLOW_PATH_HIDDEN_DECL(slow_path_new_generator);
SLOW_PATH_HIDDEN_DECL(slow_path_new_array_with_spread);
SLOW_PATH_HIDDEN_DECL(slow_path_new_array_buffer);
SLOW_PATH_HIDDEN_DECL(slow_path_spread);
SLOW_PATH_HIDDEN_DECL(iterator_open_try_fast_narrow);
SLOW_PATH_HIDDEN_DECL(iterator_open_try_fast_wide16);
SLOW_PATH_HIDDEN_DECL(iterator_open_try_fast_wide32);
SLOW_PATH_HIDDEN_DECL(iterator_next_try_fast_narrow);
SLOW_PATH_HIDDEN_DECL(iterator_next_try_fast_wide16);
SLOW_PATH_HIDDEN_DECL(iterator_next_try_fast_wide32);
using SlowPathFunction = SlowPathReturnType(SLOW_PATH *)(CallFrame*, const Instruction*);
}