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darling-JavaScriptCore/runtime/CommonSlowPaths.h

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/*
* Copyright (C) 2011-2019 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#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 {
// The purpose of this namespace is to include slow paths that are shared
// between the interpreter and baseline JIT. They are written to be agnostic
// with respect to the slow-path calling convention, but they do rely on the
// JS code being executed more-or-less directly from bytecode (so the call
// frame layout is unmodified, making it potentially awkward to use these
// from any optimizing JIT, like the DFG).
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 (static_cast<unsigned>(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 (static_cast<unsigned>(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());
// FIXME: This works but it's slow. If we cared enough about the perf when having a bad time then we could fix it.
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;
}
} // namespace CommonSlowPaths
class CallFrame;
struct Instruction;
#define JSC_DECLARE_COMMON_SLOW_PATH(name) \
extern "C" JSC_DECLARE_JIT_OPERATION(name, SlowPathReturnType, (CallFrame*, const Instruction*))
#define JSC_DEFINE_COMMON_SLOW_PATH(name) \
JSC_DEFINE_JIT_OPERATION(name, SlowPathReturnType, (CallFrame* callFrame, const Instruction* pc))
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_call_arityCheck);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_construct_arityCheck);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_create_direct_arguments);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_create_scoped_arguments);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_create_cloned_arguments);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_create_arguments_butterfly);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_create_this);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_enter);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_to_this);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_check_tdz);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_throw_strict_mode_readonly_property_write_error);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_not);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_eq);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_neq);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_stricteq);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_nstricteq);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_less);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_lesseq);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_greater);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_greatereq);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_inc);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_dec);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_to_number);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_to_numeric);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_to_string);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_to_object);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_negate);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_add);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_mul);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_sub);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_div);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_mod);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_pow);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_lshift);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_rshift);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_urshift);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_unsigned);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_bitnot);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_bitand);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_bitor);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_bitxor);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_typeof);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_typeof_is_object);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_typeof_is_function);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_is_callable);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_is_constructor);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_in_by_id);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_in_by_val);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_del_by_val);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_strcat);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_to_primitive);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_to_property_key);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_get_enumerable_length);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_has_enumerable_indexed_property);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_has_enumerable_structure_property);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_has_enumerable_property);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_has_own_structure_property);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_in_structure_property);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_get_direct_pname);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_get_property_enumerator);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_enumerator_structure_pname);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_enumerator_generic_pname);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_to_index_string);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_profile_type_clear_log);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_unreachable);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_create_lexical_environment);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_push_with_scope);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_resolve_scope);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_resolve_scope_for_hoisting_func_decl_in_eval);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_create_promise);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_create_generator);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_create_async_generator);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_create_rest);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_get_by_id_with_this);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_get_by_val_with_this);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_get_private_name);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_get_prototype_of);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_put_by_id_with_this);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_put_by_val_with_this);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_define_data_property);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_define_accessor_property);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_throw_static_error);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_new_promise);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_new_generator);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_new_array_with_spread);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_new_array_buffer);
JSC_DECLARE_COMMON_SLOW_PATH(slow_path_spread);
JSC_DECLARE_COMMON_SLOW_PATH(iterator_open_try_fast_narrow);
JSC_DECLARE_COMMON_SLOW_PATH(iterator_open_try_fast_wide16);
JSC_DECLARE_COMMON_SLOW_PATH(iterator_open_try_fast_wide32);
JSC_DECLARE_COMMON_SLOW_PATH(iterator_next_try_fast_narrow);
JSC_DECLARE_COMMON_SLOW_PATH(iterator_next_try_fast_wide16);
JSC_DECLARE_COMMON_SLOW_PATH(iterator_next_try_fast_wide32);
using SlowPathFunction = SlowPathReturnType(JIT_OPERATION_ATTRIBUTES*)(CallFrame*, const Instruction*);
} // namespace JSC
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