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JSInjectedScriptHost.cpp
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1021 lines (851 loc) · 41.2 KB
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/*
* Copyright (C) 2013-2023 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.
*/
#include "config.h"
#include "JSInjectedScriptHost.h"
#include "ArrayPrototype.h"
#include "BuiltinNames.h"
#include "Completion.h"
#include "DateInstance.h"
#include "DeferGCInlines.h"
#include "DirectArguments.h"
#include "EnumerationMode.h"
#include "FunctionPrototype.h"
#include "HeapAnalyzer.h"
#include "HeapIterationScope.h"
#include "HeapProfiler.h"
#include "InjectedScriptHost.h"
#include "IterationKind.h"
#include "IteratorOperations.h"
#include "JSArray.h"
#include "JSArrayIterator.h"
#include "JSBoundFunction.h"
#include "JSCInlines.h"
#include "JSFinalizationRegistry.h"
#include "JSInjectedScriptHostPrototype.h"
#include "JSMap.h"
#include "JSMapIterator.h"
#include "JSPromise.h"
#include "JSPromisePrototype.h"
#include "JSSet.h"
#include "JSSetIterator.h"
#include "JSStringIterator.h"
#include "JSTypedArrays.h"
#include "JSWeakMap.h"
#include "JSWeakObjectRef.h"
#include "JSWeakSet.h"
#include "MarkedSpaceInlines.h"
#include "ObjectConstructor.h"
#include "PreventCollectionScope.h"
#include "PropertyNameArray.h"
#include "ProxyObject.h"
#include "RegExpObject.h"
#include "ScopedArguments.h"
#include "SourceCode.h"
#include <wtf/Function.h>
#include <wtf/HashFunctions.h>
#include <wtf/HashMap.h>
#include <wtf/HashSet.h>
#include <wtf/Lock.h>
#include <wtf/PrintStream.h>
#include <wtf/TZoneMallocInlines.h>
#include <wtf/text/MakeString.h>
namespace Inspector {
using namespace JSC;
const ClassInfo JSInjectedScriptHost::s_info = { "InjectedScriptHost"_s, &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(JSInjectedScriptHost) };
JSInjectedScriptHost::JSInjectedScriptHost(VM& vm, Structure* structure, Ref<InjectedScriptHost>&& impl)
: Base(vm, structure)
, m_wrapped(WTF::move(impl))
{
}
JSObject* JSInjectedScriptHost::createPrototype(VM& vm, JSGlobalObject* globalObject)
{
return JSInjectedScriptHostPrototype::create(vm, globalObject, JSInjectedScriptHostPrototype::createStructure(vm, globalObject, globalObject->objectPrototype()));
}
void JSInjectedScriptHost::destroy(JSC::JSCell* cell)
{
JSInjectedScriptHost* thisObject = static_cast<JSInjectedScriptHost*>(cell);
thisObject->JSInjectedScriptHost::~JSInjectedScriptHost();
}
JSValue JSInjectedScriptHost::evaluate(JSGlobalObject* globalObject) const
{
return globalObject->evalFunction();
}
JSValue JSInjectedScriptHost::savedResultAlias(JSGlobalObject* globalObject) const
{
auto savedResultAlias = impl().savedResultAlias();
if (!savedResultAlias)
return jsUndefined();
return jsString(globalObject->vm(), savedResultAlias.value());
}
JSValue JSInjectedScriptHost::evaluateWithScopeExtension(JSGlobalObject* globalObject, CallFrame* callFrame)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSValue scriptValue = callFrame->argument(0);
if (!scriptValue.isString())
return throwTypeError(globalObject, scope, "InjectedScriptHost.evaluateWithScopeExtension first argument must be a string."_s);
auto program = asString(scriptValue)->value(globalObject);
RETURN_IF_EXCEPTION(scope, JSValue());
NakedPtr<Exception> exception;
JSObject* scopeExtension = callFrame->argument(1).getObject();
JSValue result = JSC::evaluateWithScopeExtension(globalObject, makeSource(program, callFrame->callerSourceOrigin(vm), SourceTaintedOrigin::Untainted), scopeExtension, exception);
if (exception)
throwException(globalObject, scope, exception);
return result;
}
JSValue JSInjectedScriptHost::internalConstructorName(JSGlobalObject* globalObject, CallFrame* callFrame)
{
if (callFrame->argumentCount() < 1)
return jsUndefined();
VM& vm = globalObject->vm();
JSObject* object = jsCast<JSObject*>(callFrame->uncheckedArgument(0).toThis(globalObject, ECMAMode::sloppy()));
return jsString(vm, JSObject::calculatedClassName(object));
}
JSValue JSInjectedScriptHost::isHTMLAllCollection(JSGlobalObject* globalObject, CallFrame* callFrame)
{
if (callFrame->argumentCount() < 1)
return jsUndefined();
VM& vm = globalObject->vm();
JSValue value = callFrame->uncheckedArgument(0);
return jsBoolean(impl().isHTMLAllCollection(vm, value));
}
JSValue JSInjectedScriptHost::isPromiseRejectedWithNativeGetterTypeError(JSGlobalObject* globalObject, CallFrame* callFrame)
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
auto* promise = jsDynamicCast<JSPromise*>(callFrame->argument(0));
if (!promise)
return throwTypeError(globalObject, scope, "InjectedScriptHost.isPromiseRejectedWithNativeGetterTypeError first argument must be a Promise."_s);
bool result = false;
if (auto* errorInstance = jsDynamicCast<ErrorInstance*>(promise->result()))
result = errorInstance->isNativeGetterTypeError();
return jsBoolean(result);
}
JSValue JSInjectedScriptHost::subtype(JSGlobalObject* globalObject, CallFrame* callFrame)
{
VM& vm = globalObject->vm();
if (callFrame->argumentCount() < 1)
return jsUndefined();
JSValue value = callFrame->uncheckedArgument(0);
if (value.isString())
return vm.smallStrings.stringString();
if (value.isBoolean())
return vm.smallStrings.booleanString();
if (value.isNumber())
return vm.smallStrings.numberString();
if (value.isSymbol())
return vm.smallStrings.symbolString();
if (auto* object = jsDynamicCast<JSObject*>(value)) {
if (object->isErrorInstance())
return jsNontrivialString(vm, "error"_s);
// Consider class constructor functions class objects.
JSFunction* function = jsDynamicCast<JSFunction*>(value);
if (function && function->isClassConstructorFunction())
return jsNontrivialString(vm, "class"_s);
if (object->inherits<JSArray>())
return jsNontrivialString(vm, "array"_s);
if (object->inherits<DirectArguments>() || object->inherits<ScopedArguments>())
return jsNontrivialString(vm, "array"_s);
if (object->inherits<DateInstance>())
return jsNontrivialString(vm, "date"_s);
if (object->inherits<RegExpObject>())
return jsNontrivialString(vm, "regexp"_s);
if (object->inherits<ProxyObject>())
return jsNontrivialString(vm, "proxy"_s);
if (object->inherits<JSWeakObjectRef>())
return jsNontrivialString(vm, "weakref"_s);
if (object->inherits<JSMap>())
return jsNontrivialString(vm, "map"_s);
if (object->inherits<JSSet>())
return jsNontrivialString(vm, "set"_s);
if (object->inherits<JSWeakMap>())
return jsNontrivialString(vm, "weakmap"_s);
if (object->inherits<JSWeakSet>())
return jsNontrivialString(vm, "weakset"_s);
if (object->inherits<JSStringIterator>())
return jsNontrivialString(vm, "iterator"_s);
if (object->inherits<JSArrayIterator>()
|| object->inherits<JSMapIterator>()
|| object->inherits<JSSetIterator>())
return jsNontrivialString(vm, "iterator"_s);
if (object->inherits<JSInt8Array>()
|| object->inherits<JSInt16Array>()
|| object->inherits<JSInt32Array>()
|| object->inherits<JSUint8Array>()
|| object->inherits<JSUint8ClampedArray>()
|| object->inherits<JSUint16Array>()
|| object->inherits<JSUint32Array>()
|| object->inherits<JSFloat16Array>()
|| object->inherits<JSFloat32Array>()
|| object->inherits<JSFloat64Array>()
|| object->inherits<JSBigInt64Array>()
|| object->inherits<JSBigUint64Array>())
return jsNontrivialString(vm, "array"_s);
}
return impl().subtype(globalObject, value);
}
JSValue JSInjectedScriptHost::functionDetails(JSGlobalObject* globalObject, CallFrame* callFrame)
{
if (callFrame->argumentCount() < 1)
return jsUndefined();
VM& vm = globalObject->vm();
JSValue value = callFrame->uncheckedArgument(0);
auto* function = jsDynamicCast<JSFunction*>(value);
if (!function)
return jsUndefined();
// FIXME: <https://webkit.org/b/87192> Web Inspector: Expose function scope / closure data
auto* targetFunction = function;
while (auto* boundFunction = jsDynamicCast<JSBoundFunction*>(targetFunction)) {
auto* nextTargetFunction = jsDynamicCast<JSFunction*>(boundFunction->targetFunction());
if (!nextTargetFunction) [[unlikely]]
break;
targetFunction = nextTargetFunction;
}
const SourceCode* sourceCode = targetFunction->sourceCode();
if (!sourceCode)
return jsUndefined();
// In the inspector protocol all positions are 0-based while in SourceCode they are 1-based
int lineNumber = sourceCode->firstLine().oneBasedInt();
if (lineNumber)
lineNumber -= 1;
int columnNumber = sourceCode->startColumn().oneBasedInt();
if (columnNumber)
columnNumber -= 1;
String scriptID = String::number(sourceCode->provider()->asID());
JSObject* location = constructEmptyObject(globalObject);
location->putDirect(vm, Identifier::fromString(vm, "scriptId"_s), jsString(vm, WTF::move(scriptID)));
location->putDirect(vm, Identifier::fromString(vm, "lineNumber"_s), jsNumber(lineNumber));
location->putDirect(vm, Identifier::fromString(vm, "columnNumber"_s), jsNumber(columnNumber));
JSObject* result = constructEmptyObject(globalObject);
result->putDirect(vm, Identifier::fromString(vm, "location"_s), location);
String name = function->name(vm);
if (!name.isEmpty())
result->putDirect(vm, Identifier::fromString(vm, "name"_s), jsString(vm, WTF::move(name)));
String displayName = function->displayName(vm);
if (!displayName.isEmpty())
result->putDirect(vm, Identifier::fromString(vm, "displayName"_s), jsString(vm, WTF::move(displayName)));
return result;
}
static JSObject* constructInternalProperty(JSGlobalObject* globalObject, const String& name, JSValue value)
{
VM& vm = globalObject->vm();
JSObject* result = constructEmptyObject(globalObject);
result->putDirect(vm, Identifier::fromString(vm, "name"_s), jsString(vm, name));
result->putDirect(vm, Identifier::fromString(vm, "value"_s), value);
return result;
}
JSValue JSInjectedScriptHost::getOwnPrivatePropertySymbols(JSGlobalObject* globalObject, CallFrame* callFrame)
{
if (callFrame->argumentCount() < 1)
return jsUndefined();
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSValue value = callFrame->uncheckedArgument(0);
JSArray* result = constructEmptyArray(globalObject, nullptr);
RETURN_IF_EXCEPTION(scope, JSValue());
JSObject* object = jsDynamicCast<JSObject*>(value);
if (!object)
return result;
unsigned index = 0;
PropertyNameArrayBuilder propertyNames(vm, PropertyNameMode::StringsAndSymbols, PrivateSymbolMode::Include);
JSObject::getOwnPropertyNames(object, globalObject, propertyNames, DontEnumPropertiesMode::Include);
for (const auto& propertyName : propertyNames) {
if (!propertyName.isPrivateName())
continue;
// Authored private properties are indistinguishable from internal private properties except for their use of the `#` prefix.
if (!propertyName.string().startsWith('#'))
continue;
result->putDirectIndex(globalObject, index++, Symbol::create(vm, *static_cast<SymbolImpl*>(propertyName.impl())));
}
return result;
}
JSValue JSInjectedScriptHost::getInternalProperties(JSGlobalObject* globalObject, CallFrame* callFrame)
{
if (callFrame->argumentCount() < 1)
return jsUndefined();
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSValue value = callFrame->uncheckedArgument(0);
JSValue internalProperties = impl().getInternalProperties(vm, globalObject, value);
if (internalProperties)
return internalProperties;
if (JSPromise* promise = jsDynamicCast<JSPromise*>(value)) {
unsigned index = 0;
JSArray* array = constructEmptyArray(globalObject, nullptr);
RETURN_IF_EXCEPTION(scope, JSValue());
switch (promise->status()) {
case JSPromise::Status::Pending:
scope.release();
array->putDirectIndex(globalObject, index++, constructInternalProperty(globalObject, "status"_s, jsNontrivialString(vm, "pending"_s)));
return array;
case JSPromise::Status::Fulfilled:
array->putDirectIndex(globalObject, index++, constructInternalProperty(globalObject, "status"_s, jsNontrivialString(vm, "fulfilled"_s)));
RETURN_IF_EXCEPTION(scope, JSValue());
scope.release();
array->putDirectIndex(globalObject, index++, constructInternalProperty(globalObject, "result"_s, promise->result()));
return array;
case JSPromise::Status::Rejected:
array->putDirectIndex(globalObject, index++, constructInternalProperty(globalObject, "status"_s, jsNontrivialString(vm, "rejected"_s)));
RETURN_IF_EXCEPTION(scope, JSValue());
scope.release();
array->putDirectIndex(globalObject, index++, constructInternalProperty(globalObject, "result"_s, promise->result()));
return array;
}
// FIXME: <https://webkit.org/b/141664> Web Inspector: ES6: Improved Support for Promises - Promise Reactions
RELEASE_ASSERT_NOT_REACHED();
}
if (JSBoundFunction* boundFunction = jsDynamicCast<JSBoundFunction*>(value)) {
unsigned index = 0;
JSArray* array = constructEmptyArray(globalObject, nullptr);
RETURN_IF_EXCEPTION(scope, JSValue());
array->putDirectIndex(globalObject, index++, constructInternalProperty(globalObject, "targetFunction"_s, boundFunction->targetFunction()));
RETURN_IF_EXCEPTION(scope, JSValue());
array->putDirectIndex(globalObject, index++, constructInternalProperty(globalObject, "boundThis"_s, boundFunction->boundThis()));
RETURN_IF_EXCEPTION(scope, JSValue());
if (boundFunction->boundArgsLength()) {
scope.release();
array->putDirectIndex(globalObject, index++, constructInternalProperty(globalObject, "boundArgs"_s, boundFunction->boundArgsCopy(globalObject)));
return array;
}
return array;
}
if (JSArrowFunction* arrowFunction = jsDynamicCast<JSArrowFunction*>(value)) {
if (JSScope* jsScope = arrowFunction->scope()) {
unsigned index = 0;
JSArray* array = constructEmptyArray(globalObject, nullptr);
RETURN_IF_EXCEPTION(scope, JSValue());
JSValue thisObject = jsScope->get(globalObject, vm.propertyNames->builtinNames().thisPrivateName());
RETURN_IF_EXCEPTION(scope, JSValue());
array->putDirectIndex(globalObject, index++, constructInternalProperty(globalObject, "boundThis"_s, thisObject));
RETURN_IF_EXCEPTION(scope, JSValue());
return array;
}
}
if (JSRemoteFunction* remoteFunction = jsDynamicCast<JSRemoteFunction*>(value)) {
unsigned index = 0;
JSArray* array = constructEmptyArray(globalObject, nullptr, 1);
RETURN_IF_EXCEPTION(scope, JSValue());
array->putDirectIndex(globalObject, index++, constructInternalProperty(globalObject, "targetFunction"_s, remoteFunction->targetFunction()));
RETURN_IF_EXCEPTION(scope, JSValue());
return array;
}
if (ProxyObject* proxy = jsDynamicCast<ProxyObject*>(value)) {
unsigned index = 0;
JSArray* array = constructEmptyArray(globalObject, nullptr, 2);
RETURN_IF_EXCEPTION(scope, JSValue());
array->putDirectIndex(globalObject, index++, constructInternalProperty(globalObject, "target"_s, proxy->target()));
RETURN_IF_EXCEPTION(scope, JSValue());
scope.release();
array->putDirectIndex(globalObject, index++, constructInternalProperty(globalObject, "handler"_s, proxy->handler()));
return array;
}
if (JSWeakObjectRef* weakRef = jsDynamicCast<JSWeakObjectRef*>(value)) {
unsigned index = 0;
JSArray* array = constructEmptyArray(globalObject, nullptr, 1);
RETURN_IF_EXCEPTION(scope, JSValue());
auto* target = weakRef->deref(vm);
array->putDirectIndex(globalObject, index++, constructInternalProperty(globalObject, "target"_s, target ? target : jsUndefined()));
RETURN_IF_EXCEPTION(scope, JSValue());
return array;
}
if (JSFinalizationRegistry* finalizationRegistry = jsDynamicCast<JSFinalizationRegistry*>(value)) {
unsigned index = 0;
JSArray* array = constructEmptyArray(globalObject, nullptr, 2);
RETURN_IF_EXCEPTION(scope, JSValue());
array->putDirectIndex(globalObject, index++, constructInternalProperty(globalObject, "cleanupCallback"_s, finalizationRegistry->callback()));
RETURN_IF_EXCEPTION(scope, JSValue());
Vector<JSFinalizationRegistry::LiveRegistration> liveRegistrations;
Vector<JSFinalizationRegistry::DeadRegistration> deadRegistrations;
{
Locker locker { finalizationRegistry->cellLock() };
liveRegistrations = finalizationRegistry->liveRegistrations(locker);
deadRegistrations = finalizationRegistry->deadRegistrations(locker);
}
unsigned liveIndex = 0;
JSArray* liveArray = constructEmptyArray(globalObject, nullptr, liveRegistrations.size());
RETURN_IF_EXCEPTION(scope, JSValue());
for (auto&& liveRegistration : WTF::move(liveRegistrations)) {
JSObject* registrationObject = constructEmptyObject(globalObject);
registrationObject->putDirect(vm, Identifier::fromString(vm, "target"_s), liveRegistration.target);
registrationObject->putDirect(vm, Identifier::fromString(vm, "heldValue"_s), liveRegistration.heldValue);
if (liveRegistration.unregisterToken)
registrationObject->putDirect(vm, Identifier::fromString(vm, "unregisterToken"_s), liveRegistration.unregisterToken);
liveArray->putDirectIndex(globalObject, liveIndex++, registrationObject);
RETURN_IF_EXCEPTION(scope, JSValue());
}
array->putDirectIndex(globalObject, index++, constructInternalProperty(globalObject, "live"_s, liveArray));
RETURN_IF_EXCEPTION(scope, JSValue());
unsigned deadIndex = 0;
JSArray* deadArray = constructEmptyArray(globalObject, nullptr, deadRegistrations.size());
RETURN_IF_EXCEPTION(scope, JSValue());
for (auto&& deadRegistration : WTF::move(deadRegistrations)) {
JSObject* registrationObject = constructEmptyObject(globalObject);
registrationObject->putDirect(vm, Identifier::fromString(vm, "heldValue"_s), deadRegistration.heldValue);
if (deadRegistration.unregisterToken)
registrationObject->putDirect(vm, Identifier::fromString(vm, "unregisterToken"_s), deadRegistration.unregisterToken);
deadArray->putDirectIndex(globalObject, deadIndex++, registrationObject);
RETURN_IF_EXCEPTION(scope, JSValue());
}
array->putDirectIndex(globalObject, index++, constructInternalProperty(globalObject, "dead"_s, deadArray));
RETURN_IF_EXCEPTION(scope, JSValue());
return array;
}
if (JSObject* iteratorObject = jsDynamicCast<JSObject*>(value)) {
auto toString = [&] (IterationKind kind) {
switch (kind) {
case IterationKind::Keys:
return jsNontrivialString(vm, "keys"_s);
case IterationKind::Values:
return jsNontrivialString(vm, "values"_s);
case IterationKind::Entries:
return jsNontrivialString(vm, "entries"_s);
}
return jsNontrivialString(vm, ""_s);
};
if (auto* arrayIterator = jsDynamicCast<JSArrayIterator*>(iteratorObject)) {
JSValue iteratedValue = arrayIterator->iteratedObject();
IterationKind kind = arrayIterator->kind();
unsigned index = 0;
JSArray* array = constructEmptyArray(globalObject, nullptr, 2);
RETURN_IF_EXCEPTION(scope, JSValue());
array->putDirectIndex(globalObject, index++, constructInternalProperty(globalObject, "array"_s, iteratedValue));
RETURN_IF_EXCEPTION(scope, JSValue());
scope.release();
array->putDirectIndex(globalObject, index++, constructInternalProperty(globalObject, "kind"_s, toString(kind)));
return array;
}
if (auto* mapIterator = jsDynamicCast<JSMapIterator*>(iteratorObject)) {
JSValue iteratedValue = mapIterator->iteratedObject();
IterationKind kind = mapIterator->kind();
unsigned index = 0;
JSArray* array = constructEmptyArray(globalObject, nullptr, 2);
RETURN_IF_EXCEPTION(scope, JSValue());
array->putDirectIndex(globalObject, index++, constructInternalProperty(globalObject, "map"_s, iteratedValue));
RETURN_IF_EXCEPTION(scope, JSValue());
scope.release();
array->putDirectIndex(globalObject, index++, constructInternalProperty(globalObject, "kind"_s, toString(kind)));
return array;
}
if (auto* setIterator = jsDynamicCast<JSSetIterator*>(iteratorObject)) {
JSValue iteratedValue = setIterator->iteratedObject();
IterationKind kind = setIterator->kind();
unsigned index = 0;
JSArray* array = constructEmptyArray(globalObject, nullptr, 2);
RETURN_IF_EXCEPTION(scope, JSValue());
array->putDirectIndex(globalObject, index++, constructInternalProperty(globalObject, "set"_s, iteratedValue));
RETURN_IF_EXCEPTION(scope, JSValue());
scope.release();
array->putDirectIndex(globalObject, index++, constructInternalProperty(globalObject, "kind"_s, toString(kind)));
return array;
}
}
if (JSStringIterator* stringIterator = jsDynamicCast<JSStringIterator*>(value)) {
unsigned index = 0;
JSArray* array = constructEmptyArray(globalObject, nullptr, 1);
RETURN_IF_EXCEPTION(scope, JSValue());
scope.release();
array->putDirectIndex(globalObject, index++, constructInternalProperty(globalObject, "string"_s, stringIterator->iteratedString()));
return array;
}
return jsUndefined();
}
JSValue JSInjectedScriptHost::proxyTargetValue(CallFrame* callFrame)
{
if (callFrame->argumentCount() < 1)
return jsUndefined();
JSValue value = callFrame->uncheckedArgument(0);
ProxyObject* proxy = jsDynamicCast<ProxyObject*>(value);
if (!proxy)
return jsUndefined();
JSObject* target = proxy->target();
while (ProxyObject* proxy = jsDynamicCast<ProxyObject*>(target))
target = proxy->target();
return target;
}
JSValue JSInjectedScriptHost::weakRefTargetValue(JSGlobalObject* globalObject, CallFrame* callFrame)
{
if (callFrame->argumentCount() < 1)
return jsUndefined();
JSValue value = callFrame->uncheckedArgument(0);
JSWeakObjectRef* weakRef = jsDynamicCast<JSWeakObjectRef*>(value);
if (!weakRef)
return jsUndefined();
VM& vm = globalObject->vm();
JSCell* target = weakRef->deref(vm);
while (JSWeakObjectRef* weakRef = jsDynamicCast<JSWeakObjectRef*>(target))
target = weakRef->deref(vm);
return target ? target : jsUndefined();
}
JSValue JSInjectedScriptHost::weakMapSize(JSGlobalObject*, CallFrame* callFrame)
{
if (callFrame->argumentCount() < 1)
return jsUndefined();
JSValue value = callFrame->uncheckedArgument(0);
JSWeakMap* weakMap = jsDynamicCast<JSWeakMap*>(value);
if (!weakMap)
return jsUndefined();
return jsNumber(weakMap->size());
}
JSValue JSInjectedScriptHost::weakMapEntries(JSGlobalObject* globalObject, CallFrame* callFrame)
{
if (callFrame->argumentCount() < 1)
return jsUndefined();
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
auto* weakMap = jsDynamicCast<JSWeakMap*>(callFrame->uncheckedArgument(0));
if (!weakMap)
return jsUndefined();
MarkedArgumentBuffer buffer;
auto fetchCount = callFrame->argument(1).toIntegerOrInfinity(globalObject);
weakMap->takeSnapshot(buffer, fetchCount >= 0 ? static_cast<unsigned>(fetchCount) : 0);
ASSERT(!buffer.hasOverflowed());
JSArray* array = constructEmptyArray(globalObject, nullptr);
RETURN_IF_EXCEPTION(scope, JSValue());
for (unsigned index = 0; index < buffer.size(); index += 2) {
JSObject* entry = constructEmptyObject(globalObject);
entry->putDirect(vm, Identifier::fromString(vm, "key"_s), buffer.at(index));
entry->putDirect(vm, Identifier::fromString(vm, "value"_s), buffer.at(index + 1));
array->putDirectIndex(globalObject, index / 2, entry);
RETURN_IF_EXCEPTION(scope, JSValue());
}
return array;
}
JSValue JSInjectedScriptHost::weakSetSize(JSGlobalObject*, CallFrame* callFrame)
{
if (callFrame->argumentCount() < 1)
return jsUndefined();
JSValue value = callFrame->uncheckedArgument(0);
JSWeakSet* weakSet = jsDynamicCast<JSWeakSet*>(value);
if (!weakSet)
return jsUndefined();
return jsNumber(weakSet->size());
}
JSValue JSInjectedScriptHost::weakSetEntries(JSGlobalObject* globalObject, CallFrame* callFrame)
{
if (callFrame->argumentCount() < 1)
return jsUndefined();
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
auto* weakSet = jsDynamicCast<JSWeakSet*>(callFrame->uncheckedArgument(0));
if (!weakSet)
return jsUndefined();
MarkedArgumentBuffer buffer;
auto fetchCount = callFrame->argument(1).toIntegerOrInfinity(globalObject);
weakSet->takeSnapshot(buffer, fetchCount >= 0 ? static_cast<unsigned>(fetchCount) : 0);
ASSERT(!buffer.hasOverflowed());
JSArray* array = constructEmptyArray(globalObject, nullptr);
RETURN_IF_EXCEPTION(scope, JSValue());
for (unsigned index = 0; index < buffer.size(); ++index) {
JSObject* entry = constructEmptyObject(globalObject);
entry->putDirect(vm, Identifier::fromString(vm, "value"_s), buffer.at(index));
array->putDirectIndex(globalObject, index, entry);
RETURN_IF_EXCEPTION(scope, JSValue());
}
return array;
}
static JSObject* cloneArrayIteratorObject(JSGlobalObject* globalObject, VM& vm, JSArrayIterator* iteratorObject)
{
JSArrayIterator* clone = JSArrayIterator::create(vm, globalObject->arrayIteratorStructure(), iteratorObject->iteratedObject(), iteratorObject->internalField(JSArrayIterator::Field::Kind).get());
clone->internalField(JSArrayIterator::Field::Index).set(vm, clone, iteratorObject->internalField(JSArrayIterator::Field::Index).get());
return clone;
}
static JSObject* cloneMapIteratorObject(JSGlobalObject* globalObject, VM& vm, JSMapIterator* iteratorObject)
{
JSMapIterator* clone = JSMapIterator::create(vm, globalObject->mapIteratorStructure(), jsCast<JSMap*>(iteratorObject->iteratedObject()), iteratorObject->kind());
clone->internalField(JSMapIterator::Field::Entry).set(vm, clone, iteratorObject->internalField(JSMapIterator::Field::Entry).get());
return clone;
}
static JSObject* cloneSetIteratorObject(JSGlobalObject* globalObject, VM& vm, JSSetIterator* iteratorObject)
{
JSSetIterator* clone = JSSetIterator::create(vm, globalObject->setIteratorStructure(), jsCast<JSSet*>(iteratorObject->iteratedObject()), iteratorObject->kind());
clone->internalField(JSSetIterator::Field::Entry).set(vm, clone, iteratorObject->internalField(JSSetIterator::Field::Entry).get());
return clone;
}
JSValue JSInjectedScriptHost::iteratorEntries(JSGlobalObject* globalObject, CallFrame* callFrame)
{
if (callFrame->argumentCount() < 1)
return jsUndefined();
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSValue iterator;
JSValue value = callFrame->uncheckedArgument(0);
if (JSStringIterator* stringIterator = jsDynamicCast<JSStringIterator*>(value)) {
if (globalObject->isStringPrototypeIteratorProtocolFastAndNonObservable())
iterator = stringIterator->clone(globalObject);
} else if (JSObject* iteratorObject = jsDynamicCast<JSObject*>(value)) {
if (auto* arrayIterator = jsDynamicCast<JSArrayIterator*>(iteratorObject)) {
JSObject* iteratedObject = arrayIterator->iteratedObject();
if (isJSArray(iteratedObject)) {
JSArray* array = jsCast<JSArray*>(iteratedObject);
if (array->isIteratorProtocolFastAndNonObservable())
iterator = cloneArrayIteratorObject(globalObject, vm, arrayIterator);
} else if (TypeInfo::isArgumentsType(iteratedObject->type())) {
if (globalObject->isArrayPrototypeIteratorProtocolFastAndNonObservable())
iterator = cloneArrayIteratorObject(globalObject, vm, arrayIterator);
}
} else if (auto* mapIterator = jsDynamicCast<JSMapIterator*>(iteratorObject)) {
if (jsCast<JSMap*>(mapIterator->iteratedObject())->isIteratorProtocolFastAndNonObservable()) {
iterator = cloneMapIteratorObject(globalObject, vm, mapIterator);
RETURN_IF_EXCEPTION(scope, { });
}
} else if (auto* setIterator = jsDynamicCast<JSSetIterator*>(iteratorObject)) {
if (jsCast<JSSet*>(setIterator->iteratedObject())->isIteratorProtocolFastAndNonObservable()) {
iterator = cloneSetIteratorObject(globalObject, vm, setIterator);
RETURN_IF_EXCEPTION(scope, { });
}
}
}
RETURN_IF_EXCEPTION(scope, { });
if (!iterator)
return jsUndefined();
IterationRecord iterationRecord = { iterator, iterator.get(globalObject, vm.propertyNames->next) };
unsigned numberToFetch = 5;
JSValue numberToFetchArg = callFrame->argument(1);
double fetchDouble = numberToFetchArg.toIntegerOrInfinity(globalObject);
RETURN_IF_EXCEPTION(scope, { });
if (fetchDouble >= 0)
numberToFetch = static_cast<unsigned>(fetchDouble);
JSArray* array = constructEmptyArray(globalObject, nullptr);
RETURN_IF_EXCEPTION(scope, { });
for (unsigned i = 0; i < numberToFetch; ++i) {
JSValue next = iteratorStep(globalObject, iterationRecord);
if (scope.exception()) [[unlikely]]
break;
if (next.isFalse())
break;
JSValue nextValue = iteratorValue(globalObject, next);
RETURN_IF_EXCEPTION(scope, { });
JSObject* entry = constructEmptyObject(globalObject);
entry->putDirect(vm, Identifier::fromString(vm, "value"_s), nextValue);
array->putDirectIndex(globalObject, i, entry);
if (scope.exception()) [[unlikely]] {
scope.release();
iteratorClose(globalObject, iterationRecord.iterator);
break;
}
}
return array;
}
static bool checkForbiddenPrototype(JSGlobalObject* globalObject, JSValue value, JSValue proto)
{
if (value == proto)
return true;
// Check that the prototype chain of proto hasn't been modified to include value.
return JSObject::defaultHasInstance(globalObject, proto, value);
}
JSValue JSInjectedScriptHost::queryInstances(JSGlobalObject* globalObject, CallFrame* callFrame)
{
if (callFrame->argumentCount() < 1)
return jsUndefined();
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSValue prototypeOrConstructor = callFrame->uncheckedArgument(0);
if (!prototypeOrConstructor.isObject())
return throwTypeError(globalObject, scope, "queryInstances first argument must be an object."_s);
JSObject* object = asObject(prototypeOrConstructor);
if (object->inherits<ProxyObject>())
return throwTypeError(globalObject, scope, "queryInstances cannot be called with a Proxy."_s);
JSValue prototype = object;
PropertySlot prototypeSlot(object, PropertySlot::InternalMethodType::VMInquiry, &vm);
if (object->getPropertySlot(globalObject, vm.propertyNames->prototype, prototypeSlot)) {
RETURN_IF_EXCEPTION(scope, { });
if (prototypeSlot.isValue()) {
JSValue prototypeValue = prototypeSlot.getValue(globalObject, vm.propertyNames->prototype);
if (prototypeValue.isObject()) {
prototype = prototypeValue;
object = asObject(prototype);
}
}
}
prototypeSlot.disallowVMEntry.reset();
if (object->inherits<ProxyObject>() || prototype.inherits<ProxyObject>())
return throwTypeError(globalObject, scope, "queryInstances cannot be called with a Proxy."_s);
// FIXME: implement a way of distinguishing between internal and user-created objects.
if (checkForbiddenPrototype(globalObject, object, globalObject->objectPrototype()))
return throwTypeError(globalObject, scope, "queryInstances cannot be called with Object."_s);
if (checkForbiddenPrototype(globalObject, object, globalObject->functionPrototype()))
return throwTypeError(globalObject, scope, "queryInstances cannot be called with Function."_s);
if (checkForbiddenPrototype(globalObject, object, globalObject->arrayPrototype()))
return throwTypeError(globalObject, scope, "queryInstances cannot be called with Array."_s);
if (checkForbiddenPrototype(globalObject, object, globalObject->mapPrototype()))
return throwTypeError(globalObject, scope, "queryInstances cannot be called with Map."_s);
if (checkForbiddenPrototype(globalObject, object, globalObject->jsSetPrototype()))
return throwTypeError(globalObject, scope, "queryInstances cannot be called with Set."_s);
if (checkForbiddenPrototype(globalObject, object, globalObject->promisePrototype()))
return throwTypeError(globalObject, scope, "queryInstances cannot be called with Promise."_s);
sanitizeStackForVM(vm);
vm.heap.collectNow(Sync, CollectionScope::Full);
JSArray* array = constructEmptyArray(globalObject, nullptr);
RETURN_IF_EXCEPTION(scope, { });
{
HeapIterationScope iterationScope(vm.heap);
vm.heap.objectSpace().forEachLiveCell(iterationScope, [&] (HeapCell* cell, HeapCell::Kind kind) {
if (!isJSCellKind(kind))
return IterationStatus::Continue;
JSValue value(static_cast<JSCell*>(cell));
if (value.inherits<ProxyObject>())
return IterationStatus::Continue;
if (JSObject::defaultHasInstance(globalObject, value, prototype))
array->putDirectIndex(globalObject, array->length(), value);
return IterationStatus::Continue;
});
}
return array;
}
class HeapHolderFinder final : public HeapAnalyzer {
WTF_MAKE_TZONE_ALLOCATED(HeapHolderFinder);
public:
HeapHolderFinder(HeapProfiler& profiler, JSCell* target)
: HeapAnalyzer()
, m_target(target)
{
ASSERT(!profiler.activeHeapAnalyzer());
profiler.setActiveHeapAnalyzer(this);
profiler.vm().heap.collectNow(Sync, CollectionScope::Full);
profiler.setActiveHeapAnalyzer(nullptr);
UncheckedKeyHashSet<JSCell*> queue;
// Filter `m_holders` based on whether they're reachable from a non-Debugger root.
UncheckedKeyHashSet<JSCell*> visited;
for (auto* root : m_rootsToInclude)
queue.add(root);
while (auto* from = queue.takeAny()) {
if (m_rootsToIgnore.contains(from))
continue;
if (!visited.add(from).isNewEntry)
continue;
for (auto* to : m_successors.get(from))
queue.add(to);
}
// If a known holder is not an object, also consider all of the holder's holders.
for (auto* holder : m_holders)
queue.add(holder);
while (auto* holder = queue.takeAny()) {
if (holder->isObject())
continue;
for (auto* from : m_predecessors.get(holder)) {
if (!m_holders.contains(from)) {
m_holders.add(from);
queue.add(from);
}
}
}
m_holders.removeIf([&] (auto* holder) {
return !holder->isObject() || !visited.contains(holder);
});
}
UncheckedKeyHashSet<JSCell*>& holders() { return m_holders; }
void analyzeEdge(JSCell* from, JSCell* to, RootMarkReason reason) final
{
ASSERT(to);
ASSERT(to->vm().heapProfiler()->activeHeapAnalyzer() == this);
Locker locker { m_mutex };
if (from && from != to) {
m_successors.ensure(from, [] {
return UncheckedKeyHashSet<JSCell*>();
}).iterator->value.add(to);
m_predecessors.ensure(to, [] {
return UncheckedKeyHashSet<JSCell*>();
}).iterator->value.add(from);
if (to == m_target)
m_holders.add(from);
}
if (reason == RootMarkReason::Debugger)
m_rootsToIgnore.add(to);
else if (!from || reason != RootMarkReason::None)
m_rootsToInclude.add(to);
}
void analyzePropertyNameEdge(JSCell* from, JSCell* to, UniquedStringImpl*) final { analyzeEdge(from, to, RootMarkReason::None); }
void analyzeVariableNameEdge(JSCell* from, JSCell* to, UniquedStringImpl*) final { analyzeEdge(from, to, RootMarkReason::None); }
void analyzeIndexEdge(JSCell* from, JSCell* to, uint32_t) final { analyzeEdge(from, to, RootMarkReason::None); }
void analyzeNode(JSCell*) final { }
void setOpaqueRootReachabilityReasonForCell(JSCell*, ASCIILiteral) final { }
void setWrappedObjectForCell(JSCell*, void*) final { }
void setLabelForCell(JSCell*, const String&) final { }
#ifndef NDEBUG
void dump(PrintStream& out) const
{
Indentation<4> indent;
UncheckedKeyHashSet<JSCell*> visited;
Function<void(JSCell*)> visit = [&] (auto* from) {
auto isFirstVisit = visited.add(from).isNewEntry;
out.print(makeString(indent));
out.print("[ "_s);
if (from == m_target)
out.print("T "_s);
if (m_holders.contains(from))
out.print("H "_s);
if (m_rootsToIgnore.contains(from))
out.print("- "_s);
else if (m_rootsToInclude.contains(from))
out.print("+ "_s);
if (!isFirstVisit)
out.print("V "_s);
out.print("] "_s);
from->dump(out);
out.println();
if (isFirstVisit) {
IndentationScope<4> scope(indent);
for (auto* to : m_successors.get(from))
visit(to);
}
};
for (auto* from : m_rootsToInclude)
visit(from);
}
#endif
private:
Lock m_mutex;
UncheckedKeyHashMap<JSCell*, UncheckedKeyHashSet<JSCell*>> m_predecessors;
UncheckedKeyHashMap<JSCell*, UncheckedKeyHashSet<JSCell*>> m_successors;
UncheckedKeyHashSet<JSCell*> m_rootsToInclude;
UncheckedKeyHashSet<JSCell*> m_rootsToIgnore;
UncheckedKeyHashSet<JSCell*> m_holders;
const JSCell* m_target;
};
WTF_MAKE_TZONE_ALLOCATED_IMPL(HeapHolderFinder);
JSValue JSInjectedScriptHost::queryHolders(JSGlobalObject* globalObject, CallFrame* callFrame)
{
if (callFrame->argumentCount() < 1)
return jsUndefined();
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSValue target = callFrame->uncheckedArgument(0);
if (!target.isObject())
return throwTypeError(globalObject, scope, "queryHolders first argument must be an object."_s);