WorkerScriptController.cpp [plain text]
#include "config.h"
#if ENABLE(WORKERS)
#include "WorkerScriptController.h"
#include "JSDedicatedWorkerContext.h"
#include "ScriptSourceCode.h"
#include "ScriptValue.h"
#include "WebCoreJSClientData.h"
#include "WorkerContext.h"
#include "WorkerObjectProxy.h"
#include "WorkerThread.h"
#include <heap/StrongInlines.h>
#include <interpreter/Interpreter.h>
#include <runtime/Completion.h>
#include <runtime/ExceptionHelpers.h>
#include <runtime/Error.h>
#include <runtime/JSLock.h>
#if ENABLE(SHARED_WORKERS)
#include "JSSharedWorkerContext.h"
#endif
using namespace JSC;
namespace WebCore {
WorkerScriptController::WorkerScriptController(WorkerContext* workerContext)
: m_globalData(JSGlobalData::create(ThreadStackTypeSmall))
, m_workerContext(workerContext)
, m_workerContextWrapper(*m_globalData)
, m_executionForbidden(false)
{
initNormalWorldClientData(m_globalData.get());
}
WorkerScriptController::~WorkerScriptController()
{
JSLockHolder lock(globalData());
m_workerContextWrapper.clear();
m_globalData.clear();
}
void WorkerScriptController::initScript()
{
ASSERT(!m_workerContextWrapper);
JSLockHolder lock(m_globalData.get());
Structure* workerContextPrototypeStructure = JSWorkerContextPrototype::createStructure(*m_globalData, 0, jsNull());
Strong<JSWorkerContextPrototype> workerContextPrototype(*m_globalData, JSWorkerContextPrototype::create(*m_globalData, 0, workerContextPrototypeStructure));
if (m_workerContext->isDedicatedWorkerContext()) {
Structure* dedicatedContextPrototypeStructure = JSDedicatedWorkerContextPrototype::createStructure(*m_globalData, 0, workerContextPrototype.get());
Strong<JSDedicatedWorkerContextPrototype> dedicatedContextPrototype(*m_globalData, JSDedicatedWorkerContextPrototype::create(*m_globalData, 0, dedicatedContextPrototypeStructure));
Structure* structure = JSDedicatedWorkerContext::createStructure(*m_globalData, 0, dedicatedContextPrototype.get());
m_workerContextWrapper.set(*m_globalData, JSDedicatedWorkerContext::create(*m_globalData, structure, static_cast<DedicatedWorkerContext*>(m_workerContext)));
workerContextPrototypeStructure->setGlobalObject(*m_globalData, m_workerContextWrapper.get());
dedicatedContextPrototypeStructure->setGlobalObject(*m_globalData, m_workerContextWrapper.get());
ASSERT(structure->globalObject() == m_workerContextWrapper);
ASSERT(m_workerContextWrapper->structure()->globalObject() == m_workerContextWrapper);
workerContextPrototype->structure()->setGlobalObject(*m_globalData, m_workerContextWrapper.get());
dedicatedContextPrototype->structure()->setGlobalObject(*m_globalData, m_workerContextWrapper.get());
#if ENABLE(SHARED_WORKERS)
} else {
ASSERT(m_workerContext->isSharedWorkerContext());
Structure* sharedContextPrototypeStructure = JSSharedWorkerContextPrototype::createStructure(*m_globalData, 0, workerContextPrototype.get());
Strong<JSSharedWorkerContextPrototype> sharedContextPrototype(*m_globalData, JSSharedWorkerContextPrototype::create(*m_globalData, 0, sharedContextPrototypeStructure));
Structure* structure = JSSharedWorkerContext::createStructure(*m_globalData, 0, sharedContextPrototype.get());
m_workerContextWrapper.set(*m_globalData, JSSharedWorkerContext::create(*m_globalData, structure, static_cast<SharedWorkerContext*>(m_workerContext)));
workerContextPrototype->structure()->setGlobalObject(*m_globalData, m_workerContextWrapper.get());
sharedContextPrototype->structure()->setGlobalObject(*m_globalData, m_workerContextWrapper.get());
#endif
}
ASSERT(m_workerContextWrapper->globalObject() == m_workerContextWrapper);
ASSERT(asObject(m_workerContextWrapper->prototype())->globalObject() == m_workerContextWrapper);
}
void WorkerScriptController::evaluate(const ScriptSourceCode& sourceCode)
{
if (isExecutionForbidden())
return;
ScriptValue exception;
evaluate(sourceCode, &exception);
if (exception.jsValue()) {
JSLockHolder lock(globalData());
reportException(m_workerContextWrapper->globalExec(), exception.jsValue());
}
}
void WorkerScriptController::evaluate(const ScriptSourceCode& sourceCode, ScriptValue* exception)
{
if (isExecutionForbidden())
return;
initScriptIfNeeded();
ExecState* exec = m_workerContextWrapper->globalExec();
JSLockHolder lock(exec);
m_workerContextWrapper->globalData().timeoutChecker.start();
JSValue evaluationException;
JSC::evaluate(exec, exec->dynamicGlobalObject()->globalScopeChain(), sourceCode.jsSourceCode(), m_workerContextWrapper.get(), &evaluationException);
m_workerContextWrapper->globalData().timeoutChecker.stop();
if ((evaluationException && isTerminatedExecutionException(evaluationException)) || m_workerContextWrapper->globalData().terminator.shouldTerminate()) {
forbidExecution();
return;
}
if (evaluationException) {
String errorMessage;
int lineNumber = 0;
String sourceURL = sourceCode.url().string();
if (m_workerContext->sanitizeScriptError(errorMessage, lineNumber, sourceURL))
*exception = ScriptValue(*m_globalData, throwError(exec, createError(exec, errorMessage.impl())));
else
*exception = ScriptValue(*m_globalData, evaluationException);
}
}
void WorkerScriptController::setException(ScriptValue exception)
{
throwError(m_workerContextWrapper->globalExec(), exception.jsValue());
}
void WorkerScriptController::scheduleExecutionTermination()
{
MutexLocker locker(m_scheduledTerminationMutex);
m_globalData->terminator.terminateSoon();
}
bool WorkerScriptController::isExecutionTerminating() const
{
MutexLocker locker(m_scheduledTerminationMutex);
return m_globalData->terminator.shouldTerminate();
}
void WorkerScriptController::forbidExecution()
{
ASSERT(m_workerContext->isContextThread());
m_executionForbidden = true;
}
bool WorkerScriptController::isExecutionForbidden() const
{
ASSERT(m_workerContext->isContextThread());
return m_executionForbidden;
}
void WorkerScriptController::disableEval()
{
initScriptIfNeeded();
JSLockHolder lock(globalData());
m_workerContextWrapper->setEvalEnabled(false);
}
}
#endif // ENABLE(WORKERS)