JSErrorHandler.cpp [plain text]
#include "config.h"
#include "JSErrorHandler.h"
#include "Document.h"
#include "ErrorEvent.h"
#include "Event.h"
#include "JSDOMConvertNumbers.h"
#include "JSDOMConvertStrings.h"
#include "JSEvent.h"
#include "JSExecState.h"
#include "JSExecStateInstrumentation.h"
#include <JavaScriptCore/JSLock.h>
#include <JavaScriptCore/VMEntryScope.h>
#include <wtf/Ref.h>
namespace WebCore {
using namespace JSC;
inline JSErrorHandler::JSErrorHandler(JSObject& listener, JSObject& wrapper, bool isAttribute, DOMWrapperWorld& world)
: JSEventListener(&listener, &wrapper, isAttribute, world)
{
}
Ref<JSErrorHandler> JSErrorHandler::create(JSC::JSObject& listener, JSC::JSObject& wrapper, bool isAttribute, DOMWrapperWorld& world)
{
return adoptRef(*new JSErrorHandler(listener, wrapper, isAttribute, world));
}
JSErrorHandler::~JSErrorHandler() = default;
void JSErrorHandler::handleEvent(ScriptExecutionContext& scriptExecutionContext, Event& event)
{
if (!is<ErrorEvent>(event))
return JSEventListener::handleEvent(scriptExecutionContext, event);
VM& vm = scriptExecutionContext.vm();
JSLockHolder lock(vm);
JSObject* jsFunction = this->jsFunction(scriptExecutionContext);
if (!jsFunction)
return;
auto* globalObject = toJSDOMGlobalObject(scriptExecutionContext, isolatedWorld());
if (!globalObject)
return;
CallData callData;
CallType callType = jsFunction->methodTable(vm)->getCallData(jsFunction, callData);
if (callType != CallType::None) {
Ref<JSErrorHandler> protectedThis(*this);
Event* savedEvent = globalObject->currentEvent();
globalObject->setCurrentEvent(&event);
auto& errorEvent = downcast<ErrorEvent>(event);
MarkedArgumentBuffer args;
args.append(toJS<IDLDOMString>(*globalObject, errorEvent.message()));
args.append(toJS<IDLUSVString>(*globalObject, errorEvent.filename()));
args.append(toJS<IDLUnsignedLong>(errorEvent.lineno()));
args.append(toJS<IDLUnsignedLong>(errorEvent.colno()));
args.append(errorEvent.error(*globalObject));
ASSERT(!args.hasOverflowed());
VM& vm = globalObject->vm();
VMEntryScope entryScope(vm, vm.entryScope ? vm.entryScope->globalObject() : globalObject);
JSExecState::instrumentFunctionCall(&scriptExecutionContext, callType, callData);
NakedPtr<JSC::Exception> exception;
JSValue returnValue = JSExecState::profiledCall(globalObject, JSC::ProfilingReason::Other, jsFunction, callType, callData, globalObject, args, exception);
InspectorInstrumentation::didCallFunction(&scriptExecutionContext);
globalObject->setCurrentEvent(savedEvent);
if (exception)
reportException(globalObject, exception);
else {
if (returnValue.isTrue())
event.preventDefault();
}
}
}
}