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/**
* Copyright (C) 2019-2023 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.
*/
#import "config.h"
#import "JSAPIGlobalObject.h"
#if JSC_OBJC_API_ENABLED
#import "APICast.h"
#import "CallFrameInlines.h"
#import "Completion.h"
#import "Error.h"
#import "Exception.h"
#import "GlobalObjectMethodTable.h"
#import "IdentifierInlines.h"
#import "JSContextInternal.h"
#import "JSModuleLoader.h"
#import "JSNativeStdFunction.h"
#import "JSObjectInlines.h"
#import "JSPromise.h"
#import "JSScriptInternal.h"
#import "JSSourceCode.h"
#import "JSValueInternal.h"
#import "JSVirtualMachineInternal.h"
#import "JavaScriptCore.h"
#import "ObjectConstructor.h"
#import "SourceOrigin.h"
#import "StrongInlines.h"
#import "TopExceptionScope.h"
#import
#import
namespace JSC {
const GlobalObjectMethodTable* JSAPIGlobalObject::globalObjectMethodTable()
{
static constexpr GlobalObjectMethodTable table = {
&supportsRichSourceInfo,
&shouldInterruptScript,
&javaScriptRuntimeFlags,
&shouldInterruptScriptBeforeTimeout,
&moduleLoaderImportModule, // moduleLoaderImportModule
&moduleLoaderResolve, // moduleLoaderResolve
&moduleLoaderFetch, // moduleLoaderFetch
&moduleLoaderCreateImportMetaProperties, // moduleLoaderCreateImportMetaProperties
&moduleLoaderEvaluate, // moduleLoaderEvaluate
&promiseRejectionTracker,
&reportUncaughtExceptionAtEventLoop,
¤tScriptExecutionOwner,
&scriptExecutionStatus,
&reportViolationForUnsafeEval,
nullptr, // defaultLanguage
nullptr, // compileStreaming
nullptr, // instantiateStreaming
&deriveShadowRealmGlobalObject,
&codeForEval,
&canCompileStrings,
&trustedScriptStructure,
};
return &table;
};
void JSAPIGlobalObject::reportUncaughtExceptionAtEventLoop(JSGlobalObject* globalObject, Exception* exception)
{
JSContext *context = [JSContext contextWithJSGlobalContextRef:toGlobalRef(globalObject)];
[context notifyException:toRef(globalObject->vm(), exception->value())];
}
static Expected computeValidImportSpecifier(const URL& base, const String& specifier)
{
URL absoluteURL(specifier);
if (absoluteURL.isValid())
return absoluteURL;
if (!specifier.startsWith('/') && !specifier.startsWith("./"_s) && !specifier.startsWith("../"_s))
return makeUnexpected(makeString("Module specifier: "_s, specifier, " does not start with \"/\", \"./\", or \"../\". Referenced from: "_s, base.string()));
if (specifier.startsWith('/')) {
absoluteURL = URL(URL("file://"_s), specifier);
if (absoluteURL.isValid())
return absoluteURL;
}
if (base == URL())
return makeUnexpected("Could not determine the base URL for loading."_s);
if (!base.isValid())
return makeUnexpected(makeString("Referrering script's url is not valid: "_s, base.string()));
absoluteURL = URL(base, specifier);
if (absoluteURL.isValid())
return absoluteURL;
return makeUnexpected(makeString("Could not form valid URL from identifier and base. Tried:"_s, absoluteURL.string()));
}
Identifier JSAPIGlobalObject::moduleLoaderResolve(JSGlobalObject* globalObject, JSModuleLoader*, JSValue key, JSValue referrer, RefPtr, bool)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
ASSERT_UNUSED(globalObject, globalObject == globalObject);
ASSERT(key.isString() || key.isSymbol());
String name = key.toWTFString(globalObject);
RETURN_IF_EXCEPTION(scope, { });
URL base;
if (JSString* referrerString = dynamicDowncast(referrer)) {
String value = referrerString->value(globalObject);
RETURN_IF_EXCEPTION(scope, { });
// It can be invalid URL because dynamic-import will be resolved with caller's source origin (this becomes referrer), and it can be non valid URL.
// But this is handled well in computeValidImportSpecifier.
base = URL { { }, value };
}
auto result = computeValidImportSpecifier(base, name);
if (result)
return Identifier::fromString(vm, result.value().string());
throwVMError(globalObject, scope, createError(globalObject, result.error()));
return { };
}
JSPromise* JSAPIGlobalObject::moduleLoaderImportModule(JSGlobalObject* globalObject, JSModuleLoader*, JSString* specifierValue, RefPtr fetchParams, const SourceOrigin& sourceOrigin, bool deferred)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
auto reject = [&] (ThrowScope& scope) -> JSPromise* {
auto* promise = JSPromise::create(vm, globalObject->promiseStructure());
return promise->rejectWithCaughtException(vm, scope);
};
auto specifier = specifierValue->value(globalObject);
RETURN_IF_EXCEPTION(scope, reject(scope));
Identifier originURL;
if (const String& originString = sourceOrigin.string(); !originString.isNull())
originURL = Identifier::fromString(vm, originString);
auto result = importModule(globalObject, Identifier::fromString(vm, specifier), originURL, WTF::move(fetchParams), nullptr, deferred);
RETURN_IF_EXCEPTION(scope, reject(scope));
return result;
}
JSPromise* JSAPIGlobalObject::moduleLoaderFetch(JSGlobalObject* globalObject, JSModuleLoader*, JSValue key, RefPtr, RefPtr)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
ASSERT(globalObject == globalObject);
JSContext *context = [JSContext contextWithJSGlobalContextRef:toGlobalRef(globalObject)];
JSPromise* promise = JSPromise::create(vm, globalObject->promiseStructure());
Identifier moduleKey = key.toPropertyKey(globalObject);
RETURN_IF_EXCEPTION(scope, promise->rejectWithCaughtException(vm, scope));
if (![context moduleLoaderDelegate]) [[unlikely]] {
scope.release();
promise->reject(vm, createError(globalObject, "No module loader provided."_s));
return promise;
}
auto* resolve = JSNativeStdFunction::create(vm, globalObject, 1, "resolve"_s, [promise, moduleKey] (JSGlobalObject* globalObject, CallFrame* callFrame) {
// This captures the globalObject but that's ok because our structure keeps it alive anyway.
VM& vm = globalObject->vm();
JSContext *context = [JSContext contextWithJSGlobalContextRef:toGlobalRef(globalObject)];
id script = valueToObject(context, toRef(globalObject, callFrame->argument(0)));
auto rejectPromise = [&] (String message) {
promise->reject(vm, createTypeError(globalObject, message));
return encodedJSUndefined();
};
if (![script isKindOfClass:[JSScript class]]) [[unlikely]]
return rejectPromise("First argument of resolution callback is not a JSScript"_s);
RetainPtr jsScript = static_cast(script);
JSSourceCode* source = [jsScript.get() jsSourceCode];
if ([jsScript.get() type] != kJSScriptTypeModule) [[unlikely]]
return rejectPromise("The JSScript that was provided did not have expected type of kJSScriptTypeModule."_s);
NSURL *sourceURL = [jsScript.get() sourceURL];
String oldModuleKey { [sourceURL absoluteString] };
if (Identifier::fromString(vm, oldModuleKey) != moduleKey) [[unlikely]]
return rejectPromise(makeString("The same JSScript was provided for two different identifiers, previously: "_s, oldModuleKey, " and now: "_s, moduleKey.string()));
promise->resolve(globalObject, vm, source);
return encodedJSUndefined();
}, promise);
auto* reject = JSNativeStdFunction::create(vm, globalObject, 1, "reject"_s, [promise] (JSGlobalObject* globalObject, CallFrame* callFrame) {
promise->reject(globalObject->vm(), callFrame->argument(0));
return encodedJSUndefined();
}, promise);
[[context moduleLoaderDelegate] context:context fetchModuleForIdentifier:[::JSValue valueWithJSValueRef:toRef(globalObject, key) inContext:context] withResolveHandler:[::JSValue valueWithJSValueRef:toRef(globalObject, resolve) inContext:context] andRejectHandler:[::JSValue valueWithJSValueRef:toRef(globalObject, reject) inContext:context]];
if (context.exception) {
scope.release();
promise->reject(vm, toJS(globalObject, [context.exception JSValueRef]));
context.exception = nil;
}
return promise;
}
JSObject* JSAPIGlobalObject::moduleLoaderCreateImportMetaProperties(JSGlobalObject* globalObject, JSModuleLoader*, JSValue key, JSModuleRecord*, RefPtr)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSObject* metaProperties = constructEmptyObject(vm, globalObject->nullPrototypeObjectStructure());
RETURN_IF_EXCEPTION(scope, nullptr);
metaProperties->putDirect(vm, Identifier::fromString(vm, "filename"_s), key);
RETURN_IF_EXCEPTION(scope, nullptr);
metaProperties->putDirect(vm, JSC::Identifier::fromString(vm, "url"_s), key);
RETURN_IF_EXCEPTION(scope, nullptr);
return metaProperties;
}
JSValue JSAPIGlobalObject::moduleLoaderEvaluate(JSGlobalObject* globalObject, JSModuleLoader* moduleLoader, JSValue key, JSValue moduleRecordValue, RefPtr scriptFetcher, JSValue sentValue, JSValue resumeMode)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSContext *context = [JSContext contextWithJSGlobalContextRef:toGlobalRef(globalObject)];
id moduleLoaderDelegate = [context moduleLoaderDelegate];
NSURL *url = nil;
if ([moduleLoaderDelegate respondsToSelector:@selector(willEvaluateModule:)] || [moduleLoaderDelegate respondsToSelector:@selector(didEvaluateModule:)]) {
String moduleKey = key.toWTFString(globalObject);
RETURN_IF_EXCEPTION(scope, { });
url = [NSURL URLWithString:moduleKey.createNSString().get()];
}
if ([moduleLoaderDelegate respondsToSelector:@selector(willEvaluateModule:)])
[moduleLoaderDelegate willEvaluateModule:url];
scope.release();
// FIXME: We should update the delegate callbacks for async modules. https://bugs.webkit.org/show_bug.cgi?id=222253
JSValue result = moduleLoader->evaluateNonVirtual(globalObject, key, moduleRecordValue, scriptFetcher, sentValue, resumeMode);
if ([moduleLoaderDelegate respondsToSelector:@selector(didEvaluateModule:)])
[moduleLoaderDelegate didEvaluateModule:url];
return result;
}
JSValue JSAPIGlobalObject::loadAndEvaluateJSScriptModule(const JSLockHolder&, JSScript *script)
{
ASSERT(script.type == kJSScriptTypeModule);
VM& vm = this->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
Identifier key = Identifier::fromString(vm, String { [[script sourceURL] absoluteString] });
JSPromise* promise = importModule(this, key, { }, nullptr, nullptr);
RETURN_IF_EXCEPTION(scope, { });
auto* result = JSPromise::create(vm, this->promiseStructure());
result->resolve(this, vm, promise);
RETURN_IF_EXCEPTION(scope, { });
return result;
}
}
#endif // JSC_OBJC_API_ENABLED