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/*
* Copyright (C) 2008-2023 Apple Inc. All rights reserved.
* Copyright (C) 2012 Research In Motion Limited. 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.
* 3. Neither the name of Apple Inc. ("Apple") nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "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 OR ITS 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 "JSCJSValue.h"
#include "MacroAssemblerCodeRef.h"
#include "NativeFunction.h"
#include "Opcode.h"
#include <variant>
#include <wtf/HashMap.h>
#include <wtf/TZoneMalloc.h>
#if ENABLE(C_LOOP)
#include "CLoopStack.h"
#endif
namespace JSC {
class CallLinkInfo;
#if ENABLE(WEBASSEMBLY)
namespace Wasm {
class Callee;
struct HandlerInfo;
}
#endif
template<typename> struct BaseInstruction;
struct JSOpcodeTraits;
struct WasmOpcodeTraits;
using JSInstruction = BaseInstruction<JSOpcodeTraits>;
using WasmInstruction = BaseInstruction<WasmOpcodeTraits>;
using JSOrWasmInstruction = std::variant<const JSInstruction*, const WasmInstruction*, uintptr_t /* IPIntOffset */>;
class ArgList;
class CachedCall;
class CodeBlock;
class EvalExecutable;
class Exception;
class FunctionExecutable;
class VM;
class JSBoundFunction;
class JSFunction;
class JSGlobalObject;
class JSModuleEnvironment;
class JSModuleRecord;
class LLIntOffsetsExtractor;
class ProgramExecutable;
class ModuleProgramExecutable;
class Register;
class JSObject;
class JSScope;
class SourceCode;
class StackFrame;
enum class HandlerType : uint8_t;
struct HandlerInfo;
struct ProtoCallFrame;
enum DebugHookType {
WillExecuteProgram,
DidExecuteProgram,
DidEnterCallFrame,
DidReachDebuggerStatement,
WillLeaveCallFrame,
WillExecuteStatement,
WillExecuteExpression,
};
enum StackFrameCodeType {
StackFrameGlobalCode,
StackFrameEvalCode,
StackFrameModuleCode,
StackFrameFunctionCode,
StackFrameNativeCode
};
struct CatchInfo {
CatchInfo() = default;
CatchInfo(const HandlerInfo*, CodeBlock*);
#if ENABLE(WEBASSEMBLY)
CatchInfo(const Wasm::HandlerInfo*, const Wasm::Callee*);
#endif
bool m_valid { false };
HandlerType m_type;
#if ENABLE(JIT)
CodePtr<ExceptionHandlerPtrTag> m_nativeCode;
CodePtr<ExceptionHandlerPtrTag> m_nativeCodeForDispatchAndCatch;
#endif
JSOrWasmInstruction m_catchPCForInterpreter;
uintptr_t m_catchMetadataPCForInterpreter { 0 };
uint32_t m_tryDepthForThrow { 0 };
};
typedef uint8_t LexicallyScopedFeatures;
class Interpreter {
WTF_MAKE_TZONE_NON_HEAP_ALLOCATABLE(Interpreter);
friend class CachedCall;
friend class LLIntOffsetsExtractor;
friend class JIT;
friend class VM;
public:
Interpreter();
~Interpreter();
#if ENABLE(C_LOOP)
CLoopStack& cloopStack() { return m_cloopStack; }
const CLoopStack& cloopStack() const { return m_cloopStack; }
#endif
static inline JSC::Opcode getOpcode(OpcodeID);
static inline OpcodeID getOpcodeID(JSC::Opcode);
#if ASSERT_ENABLED
static bool isOpcode(Opcode);
#endif
JSValue executeProgram(const SourceCode&, JSGlobalObject*, JSObject* thisObj);
JSValue executeModuleProgram(JSModuleRecord*, ModuleProgramExecutable*, JSGlobalObject*, JSModuleEnvironment*, JSValue sentValue, JSValue resumeMode);
JSValue executeCall(JSObject* function, const CallData&, JSValue thisValue, const ArgList&);
JSObject* executeConstruct(JSObject* function, const CallData&, const ArgList&, JSValue newTarget);
JSValue executeEval(EvalExecutable*, JSValue thisValue, JSScope*);
void getArgumentsData(CallFrame*, JSFunction*&, ptrdiff_t& firstParameterIndex, Register*& argv, int& argc);
NEVER_INLINE CatchInfo unwind(VM&, CallFrame*&, Exception*);
void notifyDebuggerOfExceptionToBeThrown(VM&, JSGlobalObject*, CallFrame*, Exception*);
NEVER_INLINE void debug(CallFrame*, DebugHookType);
static String stackTraceAsString(VM&, const Vector<StackFrame>&);
void getStackTrace(JSCell* owner, Vector<StackFrame>& results, size_t framesToSkip = 0, size_t maxStackSize = std::numeric_limits<size_t>::max(), JSCell* caller = nullptr, JSCell* ownerOfCallLinkInfo = nullptr, CallLinkInfo* = nullptr);
static JSValue checkVMEntryPermission();
private:
enum ExecutionFlag { Normal, InitializeAndReturn };
CodeBlock* prepareForCachedCall(CachedCall&, JSFunction*);
JSValue executeCachedCall(CachedCall&);
JSValue executeBoundCall(VM&, JSBoundFunction*, const ArgList&);
JSValue executeCallImpl(VM&, JSObject*, const CallData&, JSValue, const ArgList&);
#if CPU(ARM64) && CPU(ADDRESS64) && !ENABLE(C_LOOP)
template<typename... Args>
JSValue tryCallWithArguments(CachedCall&, JSValue, Args...);
#endif
inline VM& vm();
#if ENABLE(C_LOOP)
CLoopStack m_cloopStack;
#endif
#if ENABLE(COMPUTED_GOTO_OPCODES)
#if !ENABLE(LLINT_EMBEDDED_OPCODE_ID) || ASSERT_ENABLED
static UncheckedKeyHashMap<Opcode, OpcodeID>& opcodeIDTable(); // Maps Opcode => OpcodeID.
#endif // !ENABLE(LLINT_EMBEDDED_OPCODE_ID) || ASSERT_ENABLED
#endif // ENABLE(COMPUTED_GOTO_OPCODES)
};
JSValue eval(CallFrame*, JSValue thisValue, JSScope*, LexicallyScopedFeatures);
inline CallFrame* calleeFrameForVarargs(CallFrame*, unsigned numUsedStackSlots, unsigned argumentCountIncludingThis);
unsigned sizeOfVarargs(JSGlobalObject*, JSValue arguments, uint32_t firstVarArgOffset);
static constexpr unsigned maxArguments = 0x100000;
unsigned sizeFrameForVarargs(JSGlobalObject*, CallFrame*, VM&, JSValue arguments, unsigned numUsedStackSlots, uint32_t firstVarArgOffset);
unsigned sizeFrameForForwardArguments(JSGlobalObject*, CallFrame*, VM&, unsigned numUsedStackSlots);
void loadVarargs(JSGlobalObject*, JSValue* firstElementDest, JSValue source, uint32_t offset, uint32_t length);
void setupVarargsFrame(JSGlobalObject*, CallFrame* execCaller, CallFrame* execCallee, JSValue arguments, uint32_t firstVarArgOffset, uint32_t length);
void setupVarargsFrameAndSetThis(JSGlobalObject*, CallFrame* execCaller, CallFrame* execCallee, JSValue thisValue, JSValue arguments, uint32_t firstVarArgOffset, uint32_t length);
void setupForwardArgumentsFrame(JSGlobalObject*, CallFrame* execCaller, CallFrame* execCallee, uint32_t length);
void setupForwardArgumentsFrameAndSetThis(JSGlobalObject*, CallFrame* execCaller, CallFrame* execCallee, JSValue thisValue, uint32_t length);
} // namespace JSC
namespace WTF {
class PrintStream;
void printInternal(PrintStream&, JSC::DebugHookType);
} // namespace WTF
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