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qv4vme_moth.cpp
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qv4vme_moth.cpp
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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qv4vme_moth_p.h"
#include <QtCore/qjsondocument.h>
#include <QtCore/qjsonobject.h>
#include <private/qv4alloca_p.h>
#include <private/qv4instr_moth_p.h>
#include <private/qv4value_p.h>
#include <private/qv4debugging_p.h>
#include <private/qv4function_p.h>
#include <private/qv4functionobject_p.h>
#include <private/qv4math_p.h>
#include <private/qv4scopedvalue_p.h>
#include <private/qv4lookup_p.h>
#include <private/qv4regexp_p.h>
#include <private/qv4regexpobject_p.h>
#include <private/qv4string_p.h>
#include <private/qv4profiling_p.h>
#include <private/qv4jscall_p.h>
#include <private/qv4generatorobject_p.h>
#include <private/qv4alloca_p.h>
#include <private/qqmljavascriptexpression_p.h>
#include <private/qv4qmlcontext_p.h>
#include <QtQml/private/qv4runtime_p.h>
#include <iostream>
#if QT_CONFIG(qml_jit)
#include <private/qv4baselinejit_p.h>
#endif
#include <qtqml_tracepoints_p.h>
#undef COUNT_INSTRUCTIONS
Q_TRACE_POINT(qtqml, QQmlV4_function_call_entry, const QV4::ExecutionEngine *engine, const QString &function, const QString &fileName, int line, int column)
Q_TRACE_POINT(qtqml, QQmlV4_function_call_exit)
enum { ShowWhenDeoptimiationHappens = 0 };
extern "C" {
// This is the interface to Qt Creator's (new) QML debugger.
/*! \internal
\since 5.5
This function is called uncondionally from VME::run().
An attached debugger can set a breakpoint here to
intercept calls to VME::run().
*/
Q_QML_EXPORT void qt_v4ResolvePendingBreakpointsHook()
{
}
/*! \internal
\since 5.5
This function is called when a QML interpreter breakpoint
is hit.
An attached debugger can set a breakpoint here.
*/
Q_QML_EXPORT void qt_v4TriggeredBreakpointHook()
{
}
/*! \internal
\since 5.5
The main entry point into "Native Mixed" Debugging.
Commands are passed as UTF-8 encoded JSON data.
The data has two compulsory fields:
\list
\li \c version: Version of the protocol (currently 1)
\li \c command: Name of the command
\endlist
Depending on \c command, more fields can be present.
Error is indicated by negative return values,
success by non-negative return values.
\c protocolVersion:
Returns version of implemented protocol.
\c insertBreakpoint:
Sets a breakpoint on a given file and line.
\list
\li \c fullName: Name of the QML/JS file
\li \c lineNumber: Line number in the file
\li \c condition: Breakpoint condition
\endlist
Returns a unique positive number as handle.
\c removeBreakpoint:
Removes a breakpoint from a given file and line.
\list
\li \c fullName: Name of the QML/JS file
\li \c lineNumber: Line number in the file
\li \c condition: Breakpoint condition
\endlist
Returns zero on success, a negative number on failure.
\c prepareStep:
Puts the interpreter in stepping mode.
Returns zero.
*/
Q_QML_EXPORT int qt_v4DebuggerHook(const char *json);
} // extern "C"
#if QT_CONFIG(qml_debug)
static int qt_v4BreakpointCount = 0;
static bool qt_v4IsDebugging = false;
static bool qt_v4IsStepping = false;
class Breakpoint
{
public:
Breakpoint() : bpNumber(0), lineNumber(-1) {}
bool matches(const QString &file, int line) const
{
return fullName == file && lineNumber == line;
}
int bpNumber;
int lineNumber;
QString fullName; // e.g. /opt/project/main.qml
QString engineName; // e.g. qrc:/main.qml
QString condition; // optional
};
static QVector<Breakpoint> qt_v4Breakpoints;
static Breakpoint qt_v4LastStop;
static void qt_v4TriggerBreakpoint(const Breakpoint &bp, QV4::Function *function)
{
qt_v4LastStop = bp;
// Set up some auxiliary data for informational purpose.
// This is not part of the protocol.
QV4::Heap::String *functionName = function->name();
QByteArray functionNameUtf8;
if (functionName)
functionNameUtf8 = functionName->toQString().toUtf8();
qt_v4TriggeredBreakpointHook(); // Trigger Breakpoint.
}
int qt_v4DebuggerHook(const char *json)
{
const int ProtocolVersion = 1;
enum {
Success = 0,
WrongProtocol,
NoSuchCommand,
NoSuchBreakpoint
};
QJsonDocument doc = QJsonDocument::fromJson(json);
QJsonObject ob = doc.object();
QByteArray command = ob.value(QLatin1String("command")).toString().toUtf8();
if (command == "protocolVersion") {
return ProtocolVersion; // Version number.
}
int version = ob.value(QLatin1String("version")).toString().toInt();
if (version != ProtocolVersion) {
return -WrongProtocol;
}
if (command == "insertBreakpoint") {
Breakpoint bp;
bp.bpNumber = ++qt_v4BreakpointCount;
bp.lineNumber = ob.value(QLatin1String("lineNumber")).toString().toInt();
bp.engineName = ob.value(QLatin1String("engineName")).toString();
bp.fullName = ob.value(QLatin1String("fullName")).toString();
bp.condition = ob.value(QLatin1String("condition")).toString();
qt_v4Breakpoints.append(bp);
qt_v4IsDebugging = true;
return bp.bpNumber;
}
if (command == "removeBreakpoint") {
int lineNumber = ob.value(QLatin1String("lineNumber")).toString().toInt();
QString fullName = ob.value(QLatin1String("fullName")).toString();
if (qt_v4Breakpoints.last().matches(fullName, lineNumber)) {
qt_v4Breakpoints.removeLast();
qt_v4IsDebugging = !qt_v4Breakpoints.isEmpty();
return Success;
}
for (int i = 0; i + 1 < qt_v4Breakpoints.size(); ++i) {
if (qt_v4Breakpoints.at(i).matches(fullName, lineNumber)) {
qt_v4Breakpoints[i] = qt_v4Breakpoints.takeLast();
return Success; // Ok.
}
}
return -NoSuchBreakpoint; // Failure
}
if (command == "prepareStep") {
qt_v4IsStepping = true;
return Success; // Ok.
}
return -NoSuchCommand; // Failure.
}
Q_NEVER_INLINE static void qt_v4CheckForBreak(QV4::CppStackFrame *frame)
{
if (!qt_v4IsStepping && !qt_v4Breakpoints.size())
return;
const int lineNumber = frame->lineNumber();
QV4::Function *function = frame->v4Function;
QString engineName = function->sourceFile();
if (engineName.isEmpty())
return;
if (qt_v4IsStepping) {
if (qt_v4LastStop.lineNumber != lineNumber
|| qt_v4LastStop.engineName != engineName) {
qt_v4IsStepping = false;
Breakpoint bp;
bp.bpNumber = 0;
bp.lineNumber = lineNumber;
bp.engineName = engineName;
qt_v4TriggerBreakpoint(bp, function);
return;
}
}
for (int i = qt_v4Breakpoints.size(); --i >= 0; ) {
const Breakpoint &bp = qt_v4Breakpoints.at(i);
if (bp.lineNumber != lineNumber)
continue;
if (bp.engineName != engineName)
continue;
qt_v4TriggerBreakpoint(bp, function);
}
}
Q_NEVER_INLINE static void debug_slowPath(QV4::ExecutionEngine *engine)
{
QV4::Debugging::Debugger *debugger = engine->debugger();
if (debugger && debugger->pauseAtNextOpportunity())
debugger->maybeBreakAtInstruction();
if (qt_v4IsDebugging)
qt_v4CheckForBreak(engine->currentStackFrame);
}
#endif // QT_CONFIG(qml_debug)
// End of debugger interface
using namespace QV4;
using namespace QV4::Moth;
#ifdef COUNT_INSTRUCTIONS
static struct InstrCount {
InstrCount() {
fprintf(stderr, "Counting instructions...\n");
for (int i = 0; i < MOTH_NUM_INSTRUCTIONS(); ++i)
hits[i] = 0;
}
~InstrCount() {
fprintf(stderr, "Instruction count:\n");
#define BLAH(I) \
fprintf(stderr, "%llu : %s\n", hits[int(Instr::Type::I)], #I);
FOR_EACH_MOTH_INSTR(BLAH)
#undef BLAH
}
quint64 hits[MOTH_NUM_INSTRUCTIONS()];
void hit(Instr::Type i) { hits[int(i)]++; }
} instrCount;
#endif // COUNT_INSTRUCTIONS
#define MOTH_BEGIN_INSTR_COMMON(instr) \
{ \
INSTR_##instr(MOTH_DECODE)
#ifdef COUNT_INSTRUCTIONS
# define MOTH_BEGIN_INSTR(instr) \
MOTH_BEGIN_INSTR_COMMON(instr) \
instrCount.hit(Instr::Type::instr);
#else // !COUNT_INSTRUCTIONS
# define MOTH_BEGIN_INSTR(instr) \
MOTH_BEGIN_INSTR_COMMON(instr)
#endif // COUNT_INSTRUCTIONS
#ifdef MOTH_COMPUTED_GOTO
#define MOTH_END_INSTR(instr) \
MOTH_DISPATCH_SINGLE() \
}
#else // !MOTH_COMPUTED_GOTO
#define MOTH_END_INSTR(instr) \
continue; \
}
#endif
static inline QV4::Value &stackValue(QV4::Value *stack, size_t slot, const JSTypesStackFrame *frame)
{
Q_ASSERT(slot < CallData::HeaderSize() / sizeof(QV4::StaticValue)
+ frame->jsFrame->argc()
+ frame->v4Function->compiledFunction->nRegisters);
Q_UNUSED(frame);
return stack[slot];
}
#define STACK_VALUE(temp) stackValue(stack, temp, frame)
// qv4scopedvalue_p.h also defines a CHECK_EXCEPTION macro
#ifdef CHECK_EXCEPTION
#undef CHECK_EXCEPTION
#endif
#define CHECK_EXCEPTION \
if (engine->hasException || engine->isInterrupted.loadRelaxed()) \
goto handleUnwind
static inline Heap::CallContext *getScope(QV4::Value *stack, int level)
{
Heap::ExecutionContext *scope = static_cast<ExecutionContext &>(stack[CallData::Context]).d();
while (level > 0) {
--level;
scope = scope->outer;
}
Q_ASSERT(scope);
return static_cast<Heap::CallContext *>(scope);
}
static inline const QV4::Value &constant(Function *function, int index)
{
return function->compilationUnit->constants[index].asValue<QV4::Value>();
}
static bool compareEqualInt(QV4::Value &accumulator, QV4::Value lhs, int rhs)
{
redo:
if (lhs.isUndefined())
return false;
if (lhs.isManagedOrUndefined()) {
// LHS: Managed
if (lhs.m()->internalClass->vtable->isString)
return RuntimeHelpers::stringToNumber(static_cast<String &>(lhs).toQString()) == rhs;
accumulator = lhs;
lhs = QV4::Value::fromReturnedValue(RuntimeHelpers::objectDefaultValue(&static_cast<QV4::Object &>(accumulator), PREFERREDTYPE_HINT));
goto redo;
}
switch (lhs.quickType()) {
case QV4::Value::QT_Empty:
Q_UNREACHABLE();
case QV4::Value::QT_Null:
return false;
case QV4::Value::QT_Bool:
case QV4::Value::QT_Int:
return lhs.int_32() == rhs;
default: // double
return lhs.doubleValue() == rhs;
}
}
#define STORE_IP() frame->instructionPointer = int(code - function->codeData);
#define STORE_ACC() accumulator = acc;
#define ACC Value::fromReturnedValue(acc)
#define VALUE_TO_INT(i, val) \
int i; \
do { \
if (Q_LIKELY(val.integerCompatible())) { \
i = val.int_32(); \
} else { \
double d; \
if (val.isDouble()) \
d = val.doubleValue(); \
else { \
STORE_ACC(); \
d = val.toNumberImpl(); \
CHECK_EXCEPTION; \
} \
i = QJSNumberCoercion::toInteger(d); \
} \
} while (false)
struct AOTCompiledMetaMethod
{
public:
AOTCompiledMetaMethod(const Function::AOTCompiledFunction *aotCompiledFunction)
: aotCompiledFunction(aotCompiledFunction)
{}
int parameterCount() const { return aotCompiledFunction->types.size() - 1; }
QMetaType returnMetaType() const { return aotCompiledFunction->types[0]; }
QMetaType parameterMetaType(int i) const { return aotCompiledFunction->types[i + 1]; }
private:
const Function::AOTCompiledFunction *aotCompiledFunction = nullptr;
};
void VME::exec(MetaTypesStackFrame *frame, ExecutionEngine *engine)
{
qt_v4ResolvePendingBreakpointsHook();
if (engine->checkStackLimits()) {
frame->setReturnValueUndefined();
return;
}
ExecutionEngineCallDepthRecorder executionEngineCallDepthRecorder(engine);
Function *function = frame->v4Function;
Q_ASSERT(function->aotCompiledCode);
Q_TRACE_SCOPE(QQmlV4_function_call, engine, function->name()->toQString(),
function->executableCompilationUnit()->fileName(),
function->compiledFunction->location.line(),
function->compiledFunction->location.column());
Profiling::FunctionCallProfiler profiler(engine, function); // start execution profiling
const AOTCompiledMetaMethod method(&function->aotCompiledFunction);
QV4::coerceAndCall(
engine, &method, frame->returnAndArgValues(),
frame->returnAndArgTypes(), frame->argc(),
[frame, engine, function](void **argv, int argc) {
Q_UNUSED(argc);
QQmlPrivate::AOTCompiledContext aotContext;
if (auto context = QV4::ExecutionEngine::qmlContext(frame->context()->d())) {
QV4::Heap::QQmlContextWrapper *wrapper = static_cast<Heap::QmlContext *>(context)->qml();
aotContext.qmlScopeObject = wrapper->scopeObject;
aotContext.qmlContext = wrapper->context;
}
aotContext.engine = engine->jsEngine();
aotContext.compilationUnit = function->executableCompilationUnit();
function->aotCompiledCode(&aotContext, argv);
});
}
ReturnedValue VME::exec(JSTypesStackFrame *frame, ExecutionEngine *engine)
{
qt_v4ResolvePendingBreakpointsHook();
CHECK_STACK_LIMITS(engine);
Function *function = frame->v4Function;
Q_TRACE_SCOPE(QQmlV4_function_call, engine, function->name()->toQString(),
function->executableCompilationUnit()->fileName(),
function->compiledFunction->location.line(),
function->compiledFunction->location.column());
Profiling::FunctionCallProfiler profiler(engine, function); // start execution profiling
QV4::Debugging::Debugger *debugger = engine->debugger();
#if QT_CONFIG(qml_jit)
if (debugger == nullptr) {
// Check for codeRef here. In rare cases the JIT compilation may fail, which leaves us
// with a (useless) codeRef, but no jittedCode. In that case, don't try to JIT again every
// time we execute the function, but just interpret instead.
if (function->codeRef == nullptr) {
if (engine->canJIT(function))
QV4::JIT::BaselineJIT(function).generate();
else
++function->interpreterCallCount;
}
}
#endif // QT_CONFIG(qml_jit)
// interpreter
if (debugger)
debugger->enteringFunction();
ReturnedValue result;
Q_ASSERT(function->kind != Function::AotCompiled);
if (function->jittedCode != nullptr && debugger == nullptr) {
result = function->jittedCode(frame, engine);
} else {
// interpreter
result = interpret(frame, engine, function->codeData);
}
if (debugger)
debugger->leavingFunction(result);
return result;
}
QV4::ReturnedValue VME::interpret(JSTypesStackFrame *frame, ExecutionEngine *engine, const char *code)
{
QV4::Function *function = frame->v4Function;
QV4::Value &accumulator = frame->jsFrame->accumulator.asValue<Value>();
QV4::ReturnedValue acc = accumulator.asReturnedValue();
Value *stack = reinterpret_cast<Value *>(frame->jsFrame);
MOTH_JUMP_TABLE;
for (;;) {
MOTH_DISPATCH()
Q_UNREACHABLE(); // only reached when the dispatch doesn't jump somewhere
MOTH_BEGIN_INSTR(LoadConst)
acc = constant(function, index).asReturnedValue();
MOTH_END_INSTR(LoadConst)
MOTH_BEGIN_INSTR(LoadNull)
acc = Encode::null();
MOTH_END_INSTR(LoadNull)
MOTH_BEGIN_INSTR(LoadZero)
acc = Encode(static_cast<int>(0));
MOTH_END_INSTR(LoadZero)
MOTH_BEGIN_INSTR(LoadTrue)
acc = Encode(true);
MOTH_END_INSTR(LoadTrue)
MOTH_BEGIN_INSTR(LoadFalse)
acc = Encode(false);
MOTH_END_INSTR(LoadFalse)
MOTH_BEGIN_INSTR(LoadUndefined)
acc = Encode::undefined();
MOTH_END_INSTR(LoadUndefined)
MOTH_BEGIN_INSTR(LoadInt)
acc = Encode(value);
MOTH_END_INSTR(LoadInt)
MOTH_BEGIN_INSTR(MoveConst)
STACK_VALUE(destTemp) = constant(function, constIndex);
MOTH_END_INSTR(MoveConst)
MOTH_BEGIN_INSTR(LoadReg)
acc = STACK_VALUE(reg).asReturnedValue();
MOTH_END_INSTR(LoadReg)
MOTH_BEGIN_INSTR(StoreReg)
STACK_VALUE(reg) = acc;
MOTH_END_INSTR(StoreReg)
MOTH_BEGIN_INSTR(MoveReg)
STACK_VALUE(destReg) = STACK_VALUE(srcReg);
MOTH_END_INSTR(MoveReg)
MOTH_BEGIN_INSTR(LoadImport)
acc = function->compilationUnit->imports[index]->asReturnedValue();
MOTH_END_INSTR(LoadImport)
MOTH_BEGIN_INSTR(LoadLocal)
auto cc = static_cast<Heap::CallContext *>(STACK_VALUE(CallData::Context).m());
Q_ASSERT(cc->type != QV4::Heap::CallContext::Type_GlobalContext);
acc = cc->locals[index].asReturnedValue();
MOTH_END_INSTR(LoadLocal)
MOTH_BEGIN_INSTR(StoreLocal)
CHECK_EXCEPTION;
auto cc = static_cast<Heap::CallContext *>(STACK_VALUE(CallData::Context).m());
Q_ASSERT(cc->type != QV4::Heap::CallContext::Type_GlobalContext);
QV4::WriteBarrier::write(engine, cc, cc->locals.values[index].data_ptr(), acc);
MOTH_END_INSTR(StoreLocal)
MOTH_BEGIN_INSTR(LoadScopedLocal)
auto cc = getScope(stack, scope);
acc = cc->locals[index].asReturnedValue();
MOTH_END_INSTR(LoadScopedLocal)
MOTH_BEGIN_INSTR(StoreScopedLocal)
CHECK_EXCEPTION;
auto cc = getScope(stack, scope);
QV4::WriteBarrier::write(engine, cc, cc->locals.values[index].data_ptr(), acc);
MOTH_END_INSTR(StoreScopedLocal)
MOTH_BEGIN_INSTR(LoadRuntimeString)
acc = function->compilationUnit->runtimeStrings[stringId]->asReturnedValue();
MOTH_END_INSTR(LoadRuntimeString)
MOTH_BEGIN_INSTR(MoveRegExp)
STACK_VALUE(destReg) = Runtime::RegexpLiteral::call(engine, regExpId);
MOTH_END_INSTR(MoveRegExp)
MOTH_BEGIN_INSTR(LoadClosure)
acc = Runtime::Closure::call(engine, value);
MOTH_END_INSTR(LoadClosure)
MOTH_BEGIN_INSTR(LoadName)
STORE_IP();
acc = Runtime::LoadName::call(engine, name);
CHECK_EXCEPTION;
MOTH_END_INSTR(LoadName)
MOTH_BEGIN_INSTR(LoadGlobalLookup)
STORE_IP();
QV4::Lookup *l = function->executableCompilationUnit()->runtimeLookups + index;
acc = l->globalGetter(l, engine);
CHECK_EXCEPTION;
MOTH_END_INSTR(LoadGlobalLookup)
MOTH_BEGIN_INSTR(LoadQmlContextPropertyLookup)
STORE_IP();
QV4::Lookup *l = function->executableCompilationUnit()->runtimeLookups + index;
acc = l->qmlContextPropertyGetter(l, engine, nullptr);
CHECK_EXCEPTION;
MOTH_END_INSTR(LoadQmlContextPropertyLookup)
MOTH_BEGIN_INSTR(StoreNameStrict)
STORE_IP();
STORE_ACC();
Runtime::StoreNameStrict::call(engine, name, accumulator);
CHECK_EXCEPTION;
MOTH_END_INSTR(StoreNameStrict)
MOTH_BEGIN_INSTR(StoreNameSloppy)
STORE_IP();
STORE_ACC();
Runtime::StoreNameSloppy::call(engine, name, accumulator);
CHECK_EXCEPTION;
MOTH_END_INSTR(StoreNameSloppy)
MOTH_BEGIN_INSTR(LoadElement)
STORE_IP();
STORE_ACC();
acc = Runtime::LoadElement::call(engine, STACK_VALUE(base), accumulator);
CHECK_EXCEPTION;
MOTH_END_INSTR(LoadElement)
MOTH_BEGIN_INSTR(StoreElement)
STORE_IP();
STORE_ACC();
Runtime::StoreElement::call(engine, STACK_VALUE(base), STACK_VALUE(index), accumulator);
CHECK_EXCEPTION;
MOTH_END_INSTR(StoreElement)
MOTH_BEGIN_INSTR(LoadProperty)
STORE_IP();
STORE_ACC();
acc = Runtime::LoadProperty::call(engine, accumulator, name);
CHECK_EXCEPTION;
MOTH_END_INSTR(LoadProperty)
MOTH_BEGIN_INSTR(LoadOptionalProperty)
STORE_IP();
STORE_ACC();
if (accumulator.isNullOrUndefined()) {
acc = Encode::undefined();
code += offset;
} else {
acc = Runtime::LoadProperty::call(engine, accumulator, name);
}
CHECK_EXCEPTION;
MOTH_END_INSTR(LoadOptionalProperty)
MOTH_BEGIN_INSTR(GetLookup)
STORE_IP();
STORE_ACC();
QV4::Lookup *l = function->executableCompilationUnit()->runtimeLookups + index;
if (accumulator.isNullOrUndefined()) {
QString message = QStringLiteral("Cannot read property '%1' of %2")
.arg(engine->currentStackFrame->v4Function->compilationUnit->runtimeStrings[l->nameIndex]->toQString())
.arg(accumulator.toQStringNoThrow());
acc = engine->throwTypeError(message);
goto handleUnwind;
}
acc = l->getter(l, engine, accumulator);
CHECK_EXCEPTION;
MOTH_END_INSTR(GetLookup)
MOTH_BEGIN_INSTR(GetOptionalLookup)
STORE_IP();
STORE_ACC();
QV4::Lookup *l = function->executableCompilationUnit()->runtimeLookups + index;
if (accumulator.isNullOrUndefined()) {
code += offset;
} else {
acc = l->getter(l, engine, accumulator);
}
CHECK_EXCEPTION;
MOTH_END_INSTR(GetOptionalLookup)
MOTH_BEGIN_INSTR(StoreProperty)
STORE_IP();
STORE_ACC();
Runtime::StoreProperty::call(engine, STACK_VALUE(base), name, accumulator);
CHECK_EXCEPTION;
MOTH_END_INSTR(StoreProperty)
MOTH_BEGIN_INSTR(SetLookup)
STORE_IP();
STORE_ACC();
QV4::Lookup *l = function->executableCompilationUnit()->runtimeLookups + index;
if (!l->setter(l, engine, STACK_VALUE(base), accumulator) && function->isStrict())
engine->throwTypeError();
CHECK_EXCEPTION;
MOTH_END_INSTR(SetLookup)
MOTH_BEGIN_INSTR(LoadSuperProperty)
STORE_IP();
acc = Runtime::LoadSuperProperty::call(engine, STACK_VALUE(property));
CHECK_EXCEPTION;
MOTH_END_INSTR(LoadSuperProperty)
MOTH_BEGIN_INSTR(StoreSuperProperty)
STORE_IP();
STORE_ACC();
Runtime::StoreSuperProperty::call(engine, STACK_VALUE(property), accumulator);
CHECK_EXCEPTION;
MOTH_END_INSTR(StoreSuperProperty)
MOTH_BEGIN_INSTR(Yield)
frame->setYield(code);
frame->setYieldIsIterator(false);
return acc;
MOTH_END_INSTR(Yield)
MOTH_BEGIN_INSTR(YieldStar)
frame->setYield(code);
frame->setYieldIsIterator(true);
return acc;
MOTH_END_INSTR(YieldStar)
MOTH_BEGIN_INSTR(Resume)
// check exception, in case the generator was called with throw() or return()
if (engine->hasException) {
// an empty value indicates that the generator was called with return()
if (engine->exceptionValue->asReturnedValue() != Value::emptyValue().asReturnedValue())
goto handleUnwind;
engine->hasException = false;
*engine->exceptionValue = Value::undefinedValue();
} else {
code += offset;
}
MOTH_END_INSTR(Resume)
MOTH_BEGIN_INSTR(IteratorNextForYieldStar)
STORE_ACC();
acc = Runtime::IteratorNextForYieldStar::call(engine, accumulator, STACK_VALUE(iterator), &STACK_VALUE(object));
if (ACC.toBoolean())
code += offset;
MOTH_END_INSTR(IteratorNextForYieldStar)
MOTH_BEGIN_INSTR(CallValue)
STORE_IP();
Value func = STACK_VALUE(name);
if (Q_UNLIKELY(!func.isFunctionObject())) {
acc = engine->throwTypeError(QStringLiteral("%1 is not a function").arg(func.toQStringNoThrow()));
goto handleUnwind;
}
Value undef = Value::undefinedValue();
acc = static_cast<const FunctionObject &>(func).call(&undef, stack + argv, argc);
CHECK_EXCEPTION;
MOTH_END_INSTR(CallValue)
MOTH_BEGIN_INSTR(CallWithReceiver)
STORE_IP();
Value func = STACK_VALUE(name);
if (Q_UNLIKELY(!func.isFunctionObject())) {
acc = engine->throwTypeError(QStringLiteral("%1 is not a function").arg(func.toQStringNoThrow()));
goto handleUnwind;
}
acc = static_cast<const FunctionObject &>(func).call(stack + thisObject, stack + argv, argc);
CHECK_EXCEPTION;
MOTH_END_INSTR(CallWithReceiver)
MOTH_BEGIN_INSTR(CallProperty)
STORE_IP();
acc = Runtime::CallProperty::call(engine, STACK_VALUE(base), name, stack + argv, argc);
CHECK_EXCEPTION;
MOTH_END_INSTR(CallProperty)
MOTH_BEGIN_INSTR(CallPropertyLookup)
STORE_IP();
Lookup *l = function->executableCompilationUnit()->runtimeLookups + lookupIndex;
if (STACK_VALUE(base).isNullOrUndefined()) {
QString message = QStringLiteral("Cannot call method '%1' of %2")
.arg(engine->currentStackFrame->v4Function->compilationUnit->runtimeStrings[l->nameIndex]->toQString())
.arg(STACK_VALUE(base).toQStringNoThrow());
acc = engine->throwTypeError(message);
goto handleUnwind;
}
// ok to have the value on the stack here
Value f = Value::fromReturnedValue(l->getter(l, engine, STACK_VALUE(base)));
if (Q_LIKELY(f.isFunctionObject())) {
acc = static_cast<FunctionObject &>(f).call(stack + base, stack + argv, argc);
} else if (QmlSignalHandler *handler = f.as<QmlSignalHandler>()) {
acc = handler->call(stack + base, stack + argv, argc);
} else {
const QString message = QStringLiteral("Property '%1' of object %2 is not a function")
.arg(engine->currentStackFrame->v4Function->compilationUnit
->runtimeStrings[l->nameIndex]->toQString())
.arg(STACK_VALUE(base).toQStringNoThrow());
acc = engine->throwTypeError(message);
goto handleUnwind;
}
CHECK_EXCEPTION;
MOTH_END_INSTR(CallPropertyLookup)
MOTH_BEGIN_INSTR(CallName)
STORE_IP();
acc = Runtime::CallName::call(engine, name, stack + argv, argc);
CHECK_EXCEPTION;
MOTH_END_INSTR(CallName)
MOTH_BEGIN_INSTR(CallPossiblyDirectEval)
STORE_IP();
acc = Runtime::CallPossiblyDirectEval::call(engine, stack + argv, argc);
CHECK_EXCEPTION;
MOTH_END_INSTR(CallPossiblyDirectEval)
MOTH_BEGIN_INSTR(CallGlobalLookup)
STORE_IP();
acc = Runtime::CallGlobalLookup::call(engine, index, stack + argv, argc);
CHECK_EXCEPTION;
MOTH_END_INSTR(CallGlobalLookup)
MOTH_BEGIN_INSTR(CallQmlContextPropertyLookup)
STORE_IP();
acc = Runtime::CallQmlContextPropertyLookup::call(engine, index, stack + argv, argc);
CHECK_EXCEPTION;
MOTH_END_INSTR(CallQmlContextPropertyLookup)
MOTH_BEGIN_INSTR(CallWithSpread)
STORE_IP();
acc = Runtime::CallWithSpread::call(engine, STACK_VALUE(func), STACK_VALUE(thisObject), stack + argv, argc);
CHECK_EXCEPTION;
MOTH_END_INSTR(CallWithSpread)
MOTH_BEGIN_INSTR(TailCall)
STORE_IP();
*engine->jsAlloca(1) = Primitive::fromInt32(argc);
*engine->jsAlloca(1) = Primitive::fromInt32(argv);
*engine->jsAlloca(1) = STACK_VALUE(thisObject);
*engine->jsAlloca(1) = STACK_VALUE(func);
return Runtime::TailCall::call(frame, engine);
CHECK_EXCEPTION;
MOTH_END_INSTR(TailCall)
MOTH_BEGIN_INSTR(Construct)
STORE_IP();
STORE_ACC();
acc = Runtime::Construct::call(engine, STACK_VALUE(func), ACC, stack + argv, argc);
CHECK_EXCEPTION;
MOTH_END_INSTR(Construct)
MOTH_BEGIN_INSTR(ConstructWithSpread)
STORE_IP();
STORE_ACC();
acc = Runtime::ConstructWithSpread::call(engine, STACK_VALUE(func), ACC, stack + argv, argc);
CHECK_EXCEPTION;
MOTH_END_INSTR(ConstructWithSpread)
MOTH_BEGIN_INSTR(SetUnwindHandler)
frame->unwindHandler = offset ? code + offset : nullptr;
MOTH_END_INSTR(SetUnwindHandler)
MOTH_BEGIN_INSTR(UnwindDispatch)
CHECK_EXCEPTION;
if (frame->unwindLevel) {
--frame->unwindLevel;
if (frame->unwindLevel)
goto handleUnwind;
code = frame->unwindLabel;
}
MOTH_END_INSTR(UnwindDispatch)
MOTH_BEGIN_INSTR(UnwindToLabel)
frame->unwindLevel = level;
frame->unwindLabel = code + offset;
goto handleUnwind;
MOTH_END_INSTR(UnwindToLabel)
MOTH_BEGIN_INSTR(DeadTemporalZoneCheck)
if (ACC.isEmpty()) {
STORE_IP();
Runtime::ThrowReferenceError::call(engine, name);
goto handleUnwind;
}
MOTH_END_INSTR(DeadTemporalZoneCheck)
MOTH_BEGIN_INSTR(ThrowException)
STORE_IP();
STORE_ACC();
Runtime::ThrowException::call(engine, accumulator);
goto handleUnwind;
MOTH_END_INSTR(ThrowException)
MOTH_BEGIN_INSTR(GetException)
acc = engine->hasException ? engine->exceptionValue->asReturnedValue()
: Value::emptyValue().asReturnedValue();
engine->hasException = false;
MOTH_END_INSTR(GetException)
MOTH_BEGIN_INSTR(SetException)
if (acc != Value::emptyValue().asReturnedValue()) {
*engine->exceptionValue = acc;
engine->hasException = true;
}
MOTH_END_INSTR(SetException)
MOTH_BEGIN_INSTR(PushCatchContext)
Runtime::PushCatchContext::call(engine, index, name);
MOTH_END_INSTR(PushCatchContext)
MOTH_BEGIN_INSTR(CreateCallContext)
Runtime::PushCallContext::call(frame);
MOTH_END_INSTR(CreateCallContext)
MOTH_BEGIN_INSTR(PushWithContext)
STORE_IP();
STORE_ACC();
acc = Runtime::PushWithContext::call(engine, STACK_VALUE(CallData::Accumulator));
CHECK_EXCEPTION;
MOTH_END_INSTR(PushWithContext)
MOTH_BEGIN_INSTR(PushBlockContext)
STORE_ACC();
Runtime::PushBlockContext::call(engine, index);
MOTH_END_INSTR(PushBlockContext)
MOTH_BEGIN_INSTR(CloneBlockContext)
STORE_ACC();
Runtime::CloneBlockContext::call(engine);
MOTH_END_INSTR(CloneBlockContext)
MOTH_BEGIN_INSTR(PushScriptContext)
Runtime::PushScriptContext::call(engine, index);
MOTH_END_INSTR(PushScriptContext)
MOTH_BEGIN_INSTR(PopScriptContext)
Runtime::PopScriptContext::call(engine);
MOTH_END_INSTR(PopScriptContext)
MOTH_BEGIN_INSTR(PopContext)
ExecutionContext *c = static_cast<ExecutionContext *>(stack + CallData::Context);
STACK_VALUE(CallData::Context) = c->d()->outer;
MOTH_END_INSTR(PopContext)
MOTH_BEGIN_INSTR(GetIterator)
STORE_IP();
STORE_ACC();
acc = Runtime::GetIterator::call(engine, accumulator, iterator);
CHECK_EXCEPTION;
MOTH_END_INSTR(GetIterator)
MOTH_BEGIN_INSTR(IteratorNext)
STORE_IP();
STORE_ACC();
acc = Runtime::IteratorNext::call(engine, accumulator, &STACK_VALUE(value));
if (ACC.toBoolean())
code += offset;
MOTH_END_INSTR(IteratorNext)
MOTH_BEGIN_INSTR(IteratorClose)
STORE_IP();
STORE_ACC();
acc = Runtime::IteratorClose::call(engine, accumulator);
MOTH_END_INSTR(IteratorClose)
MOTH_BEGIN_INSTR(DestructureRestElement)
STORE_IP();
STORE_ACC();
acc = Runtime::DestructureRestElement::call(engine, ACC);
CHECK_EXCEPTION;
MOTH_END_INSTR(DestructureRestElement)
MOTH_BEGIN_INSTR(DeleteProperty)
acc = Runtime::DeleteProperty::call(engine, function, STACK_VALUE(base), STACK_VALUE(index));
CHECK_EXCEPTION;
MOTH_END_INSTR(DeleteProperty)
MOTH_BEGIN_INSTR(DeleteName)
acc = Runtime::DeleteName::call(engine, function, name);
CHECK_EXCEPTION;
MOTH_END_INSTR(DeleteName)
MOTH_BEGIN_INSTR(TypeofName)
acc = Runtime::TypeofName::call(engine, name);
MOTH_END_INSTR(TypeofName)
MOTH_BEGIN_INSTR(TypeofValue)
STORE_ACC();
acc = Runtime::TypeofValue::call(engine, accumulator);
MOTH_END_INSTR(TypeofValue)
MOTH_BEGIN_INSTR(DeclareVar)