#import "config.h"

#import "APICast.h"

#import "Completion.h"

#import "IntegrityInlines.h"

#import "JSAPIGlobalObject.h"

#import "JSBaseInternal.h"

#import "JSCInlines.h"

#import "JSContextInternal.h"

#import "JSContextPrivate.h"

#import "JSContextRefInternal.h"

#import "JSGlobalObject.h"

#import "JSModuleLoader.h"

#import "JSRetainPtr.h"

#import "JSScriptInternal.h"

#import "JSValueInternal.h"

#import "JSVirtualMachineInternal.h"

#import "JSWrapperMap.h"

#import "JavaScriptCore.h"

#import "ObjcRuntimeExtras.h"

#import "StrongInlines.h"

#import "TopExceptionScope.h"

#import <wtf/RetainPtr.h>

#import <wtf/WeakObjCPtr.h>

#if JSC_OBJC_API_ENABLED

@implementation JSContext {

RetainPtr<JSVirtualMachine> m_virtualMachine;

JSGlobalContextRef m_context;

RetainPtr<JSValue> m_exception;

WeakObjCPtr<id <JSModuleLoaderDelegate>> m_moduleLoaderDelegate;

}

- (JSGlobalContextRef)JSGlobalContextRef

{

return m_context;

}

- (void)ensureWrapperMap

{

if (!toJS([self JSGlobalContextRef])->wrapperMap()) {

// The map will be retained by the GlobalObject in initialization.

[[[JSWrapperMap alloc] initWithGlobalContextRef:[self JSGlobalContextRef]] release];

}

}

- (instancetype)init

{

return [self initWithVirtualMachine:adoptNS([[JSVirtualMachine alloc] init]).get()];

}

- (instancetype)initWithVirtualMachine:(JSVirtualMachine *)virtualMachine

{

self = [super init];

if (!self)

return nil;

m_virtualMachine = virtualMachine;

m_context = JSGlobalContextCreateInGroup(getGroupFromVirtualMachine(virtualMachine), 0);

self.exceptionHandler = ^(JSContext *context, JSValue *exceptionValue) {

context.exception = exceptionValue;

};

[self ensureWrapperMap];

[m_virtualMachine addContext:self forGlobalContextRef:m_context];

return self;

}

- (void)dealloc

{

m_exception = nil;

JSGlobalContextRelease(m_context);

[_exceptionHandler release];

[super dealloc];

}

- (JSValue *)evaluateScript:(NSString *)script

{

return [self evaluateScript:script withSourceURL:nil];

}

- (JSValue *)evaluateScript:(NSString *)script withSourceURL:(NSURL *)sourceURL

{

JSValueRef exceptionValue = nullptr;

auto scriptJS = OpaqueJSString::tryCreate(script);

auto sourceURLJS = OpaqueJSString::tryCreate([sourceURL absoluteString]);

JSValueRef result = JSEvaluateScript(m_context, scriptJS.get(), nullptr, sourceURLJS.get(), 0, &exceptionValue);

if (exceptionValue)

return [self valueFromNotifyException:exceptionValue];

return [JSValue valueWithJSValueRef:result inContext:self];

}

- (JSValue *)evaluateJSScript:(JSScript *)script

{

JSC::JSGlobalObject* globalObject = toJS(m_context);

JSC::VM& vm = globalObject->vm();

JSC::JSLockHolder locker(vm);

if (script.type == kJSScriptTypeProgram) {

JSValueRef exceptionValue = nullptr;

JSC::SourceCode sourceCode = [script sourceCode];

JSValueRef result = JSEvaluateScriptInternal(locker, m_context, nullptr, sourceCode, &exceptionValue);

if (exceptionValue)

return [self valueFromNotifyException:exceptionValue];

return [JSValue valueWithJSValueRef:result inContext:self];

}

auto* apiGlobalObject = dynamicDowncast<JSC::JSAPIGlobalObject>(globalObject);

if (!apiGlobalObject)

return [JSValue valueWithNewPromiseRejectedWithReason:[JSValue valueWithNewErrorFromMessage:@"Context does not support module loading" inContext:self] inContext:self];

auto scope = DECLARE_TOP_EXCEPTION_SCOPE(vm);

JSC::JSValue result = apiGlobalObject->loadAndEvaluateJSScriptModule(locker, script);

if (scope.exception()) {

JSValueRef exceptionValue = toRef(apiGlobalObject, scope.exception()->value());

scope.clearException();

// FIXME: We should not clearException if it is the TerminationException.

// https://bugs.webkit.org/show_bug.cgi?id=220821

return [JSValue valueWithNewPromiseRejectedWithReason:[JSValue valueWithJSValueRef:exceptionValue inContext:self] inContext:self];

}

return [JSValue valueWithJSValueRef:toRef(vm, result) inContext:self];

}

- (JSValue *)dependencyIdentifiersForModuleJSScript:(JSScript *)script

{

JSC::JSGlobalObject* globalObject = toJS(m_context);

JSC::VM& vm = globalObject->vm();

JSC::JSLockHolder locker(vm);

if (script.type != kJSScriptTypeModule) {

self.exceptionHandler(self, [JSValue valueWithNewErrorFromMessage:@"script is not a module" inContext:self]);

return [JSValue valueWithUndefinedInContext:self];

}

auto scope = DECLARE_TOP_EXCEPTION_SCOPE(vm);

JSC::JSArray* result = globalObject->moduleLoader()->dependencyKeysIfEvaluated(globalObject, String([[script sourceURL] absoluteString]));

if (scope.exception()) {

JSValueRef exceptionValue = toRef(globalObject, scope.exception()->value());

scope.clearException();

return [self valueFromNotifyException:exceptionValue];

}

if (!result) {

self.exceptionHandler(self, [JSValue valueWithNewErrorFromMessage:@"script has not run in context or was not evaluated successfully" inContext:self]);

return [JSValue valueWithUndefinedInContext:self];

}

return [JSValue valueWithJSValueRef:toRef(vm, result) inContext:self];

}

- (void)_setITMLDebuggableType

{

JSC::JSGlobalObject* globalObject = toJS(m_context);

JSC::VM& vm = globalObject->vm();

JSC::JSLockHolder locker(vm);

globalObject->setIsITML();

}

- (void)setException:(JSValue *)value

{

JSC::JSGlobalObject* globalObject = toJS(m_context);

JSC::VM& vm = globalObject->vm();

JSC::JSLockHolder locker(vm);

m_exception = value;

}

- (JSValue *)exception

{

return m_exception.get();

}

- (JSValue *)globalObject

{

return [JSValue valueWithJSValueRef:JSContextGetGlobalObject(m_context) inContext:self];

}

+ (JSContext *)currentContext

{

auto& thread = Thread::currentSingleton();

CallbackData *entry = (CallbackData *)thread.m_apiData;

return entry ? entry->context.get() : nil;

}

+ (JSValue *)currentThis

{

auto& thread = Thread::currentSingleton();

CallbackData *entry = (CallbackData *)thread.m_apiData;

if (!entry)

return nil;

return [JSValue valueWithJSValueRef:entry->thisValue inContext:[JSContext currentContext]];

}

+ (JSValue *)currentCallee

{

auto& thread = Thread::currentSingleton();

CallbackData *entry = (CallbackData *)thread.m_apiData;

// calleeValue may be null if we are initializing a promise.

if (!entry || !entry->calleeValue)

return nil;

return [JSValue valueWithJSValueRef:entry->calleeValue inContext:[JSContext currentContext]];

}

+ (NSArray *)currentArguments

{

auto& thread = Thread::currentSingleton();

CallbackData *entry = (CallbackData *)thread.m_apiData;

if (!entry)

return nil;

if (!entry->currentArguments) {

JSContext *context = [JSContext currentContext];

size_t count = entry->argumentCount;

auto arguments = adoptNS([[NSMutableArray alloc] initWithCapacity:count]);

for (size_t i = 0; i < count; ++i)

[arguments setObject:[JSValue valueWithJSValueRef:entry->arguments[i] inContext:context] atIndexedSubscript:i];

entry->currentArguments = WTF::move(arguments);

}

return entry->currentArguments.get();

}

- (JSVirtualMachine *)virtualMachine

{

return m_virtualMachine.get();

}

- (NSString *)name

{

// FIXME: This looks like a static analysis false positive (rdar://145661220).

SUPPRESS_UNCOUNTED_ARG auto name = adopt(JSGlobalContextCopyName(m_context));

if (!name)

return nil;

// FIXME: This looks like a static analysis false positive (rdar://145661220).

SUPPRESS_UNCOUNTED_ARG return adoptCF(JSStringCopyCFString(kCFAllocatorDefault, name.get())).bridgingAutorelease();

}

- (void)setName:(NSString *)name

{

JSGlobalContextSetName(m_context, OpaqueJSString::tryCreate(name).get());

}

- (BOOL)isInspectable

{

return JSGlobalContextIsInspectable(m_context);

}

- (void)setInspectable:(BOOL)inspectable

{

JSGlobalContextSetInspectable(m_context, inspectable);

}

- (BOOL)_remoteInspectionEnabled

{

return self.inspectable;

}

- (void)_setRemoteInspectionEnabled:(BOOL)enabled

{

self.inspectable = enabled;

}

- (BOOL)_includesNativeCallStackWhenReportingExceptions

{

return JSGlobalContextGetIncludesNativeCallStackWhenReportingExceptions(m_context);

}

- (void)_setIncludesNativeCallStackWhenReportingExceptions:(BOOL)includeNativeCallStack

{

JSGlobalContextSetIncludesNativeCallStackWhenReportingExceptions(m_context, includeNativeCallStack);

}

- (CFRunLoopRef)_debuggerRunLoop

{

return JSGlobalContextGetDebuggerRunLoop(m_context);

}

- (void)_setDebuggerRunLoop:(CFRunLoopRef)runLoop

{

JSGlobalContextSetDebuggerRunLoop(m_context, runLoop);

}

- (id<JSModuleLoaderDelegate>)moduleLoaderDelegate

{

return m_moduleLoaderDelegate.getAutoreleased();

}

- (void)setModuleLoaderDelegate:(id<JSModuleLoaderDelegate>)moduleLoaderDelegate

{

m_moduleLoaderDelegate = moduleLoaderDelegate;

}

@implementation JSContext(SubscriptSupport)

- (JSValue *)objectForKeyedSubscript:(id)key

{

return [self globalObject][key];

}

- (void)setObject:(id)object forKeyedSubscript:(NSObject <NSCopying> *)key

{

[self globalObject][key] = object;

}

@implementation JSContext (Internal)

- (instancetype)initWithGlobalContextRef:(JSGlobalContextRef)context

{

self = [super init];

if (!self)

return nil;

JSC::JSGlobalObject* globalObject = toJS(context);

m_virtualMachine = [JSVirtualMachine virtualMachineWithContextGroupRef:toRef(&globalObject->vm())];

ASSERT(m_virtualMachine);

m_context = JSGlobalContextRetain(context);

[self ensureWrapperMap];

self.exceptionHandler = ^(JSContext *context, JSValue *exceptionValue) {

context.exception = exceptionValue;

};

[m_virtualMachine addContext:self forGlobalContextRef:m_context];

return self;

}

- (void)notifyException:(JSValueRef)exceptionValue

{

self.exceptionHandler(self, [JSValue valueWithJSValueRef:exceptionValue inContext:self]);

}

- (JSValue *)valueFromNotifyException:(JSValueRef)exceptionValue

{

[self notifyException:exceptionValue];

return [JSValue valueWithUndefinedInContext:self];

}

- (BOOL)boolFromNotifyException:(JSValueRef)exceptionValue

{

[self notifyException:exceptionValue];

return NO;

}

- (void)beginCallbackWithData:(CallbackData *)callbackData calleeValue:(JSValueRef)calleeValue thisValue:(JSValueRef)thisValue argumentCount:(size_t)argumentCount arguments:(const JSValueRef *)arguments

{

auto& thread = Thread::currentSingleton();

[self retain];

CallbackData *prevStack = (CallbackData *)thread.m_apiData;

*callbackData = CallbackData { prevStack, self, self.exception, calleeValue, thisValue, argumentCount, arguments, nil };

thread.m_apiData = callbackData;

self.exception = nil;

}

- (void)endCallbackWithData:(CallbackData *)callbackData

{

auto& thread = Thread::currentSingleton();

self.exception = callbackData->preservedException.get();

thread.m_apiData = callbackData->next;

[self release];

}

- (JSValue *)wrapperForObjCObject:(id)object

{

JSC::JSLockHolder locker(toJS(m_context));

return [[self wrapperMap] jsWrapperForObject:object inContext:self];

}

- (JSWrapperMap *)wrapperMap

{

return toJS(m_context)->wrapperMap();

}

- (JSValue *)wrapperForJSObject:(JSValueRef)value

{

JSC::JSLockHolder locker(toJS(m_context));

return [[self wrapperMap] objcWrapperForJSValueRef:value inContext:self];

}

+ (JSContext *)contextWithJSGlobalContextRef:(JSGlobalContextRef)globalContext

{

JSVirtualMachine *virtualMachine = [JSVirtualMachine virtualMachineWithContextGroupRef:toRef(&toJS(globalContext)->vm())];

auto context = retainPtr([virtualMachine contextForGlobalContextRef:globalContext]);

if (!context)

context = adoptNS([[JSContext alloc] initWithGlobalContextRef:globalContext]);

return context.autorelease();

}

#endif