WorkerScriptController.cpp [plain text]
#include "config.h"
#if ENABLE(WORKERS)
#include "WorkerScriptController.h"
#include "JSDedicatedWorkerContext.h"
#include "JSSharedWorkerContext.h"
#include "ScriptSourceCode.h"
#include "ScriptValue.h"
#include "WebCoreJSClientData.h"
#include "WorkerContext.h"
#include "WorkerObjectProxy.h"
#include "WorkerThread.h"
#include <interpreter/Interpreter.h>
#include <runtime/Completion.h>
#include <runtime/Completion.h>
#include <runtime/Error.h>
#include <runtime/JSLock.h>
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()
{
m_workerContextWrapper.clear(); m_globalData->clearBuiltinStructures();
m_globalData->heap.destroy();
}
void WorkerScriptController::initScript()
{
ASSERT(!m_workerContextWrapper);
JSLock lock(SilenceAssertionsOnly);
Structure* workerContextPrototypeStructure = JSWorkerContextPrototype::createStructure(*m_globalData, jsNull());
Strong<JSWorkerContextPrototype> workerContextPrototype(*m_globalData, new (m_globalData.get()) JSWorkerContextPrototype(*m_globalData, 0, workerContextPrototypeStructure));
if (m_workerContext->isDedicatedWorkerContext()) {
Structure* dedicatedContextPrototypeStructure = JSDedicatedWorkerContextPrototype::createStructure(*m_globalData, workerContextPrototype.get());
Strong<JSDedicatedWorkerContextPrototype> dedicatedContextPrototype(*m_globalData, new (m_globalData.get()) JSDedicatedWorkerContextPrototype(*m_globalData, 0, dedicatedContextPrototypeStructure));
Structure* structure = JSDedicatedWorkerContext::createStructure(*m_globalData, dedicatedContextPrototype.get());
m_workerContextWrapper.set(*m_globalData, new (m_globalData.get()) JSDedicatedWorkerContext(*m_globalData, structure, m_workerContext->toDedicatedWorkerContext()));
workerContextPrototype->putAnonymousValue(*m_globalData, 0, m_workerContextWrapper.get());
dedicatedContextPrototype->putAnonymousValue(*m_globalData, 0, m_workerContextWrapper.get());
#if ENABLE(SHARED_WORKERS)
} else {
ASSERT(m_workerContext->isSharedWorkerContext());
Structure* sharedContextPrototypeStructure = JSSharedWorkerContextPrototype::createStructure(*m_globalData, workerContextPrototype.get());
Strong<JSSharedWorkerContextPrototype> sharedContextPrototype(*m_globalData, new (m_globalData.get()) JSSharedWorkerContextPrototype(*m_globalData, 0, sharedContextPrototypeStructure));
Structure* structure = JSSharedWorkerContext::createStructure(*m_globalData, sharedContextPrototype.get());
m_workerContextWrapper.set(*m_globalData, new (m_globalData.get()) JSSharedWorkerContext(*m_globalData, structure, m_workerContext->toSharedWorkerContext()));
workerContextPrototype->putAnonymousValue(*m_globalData, 0, m_workerContextWrapper.get());
sharedContextPrototype->putAnonymousValue(*m_globalData, 0, m_workerContextWrapper.get());
#endif
}
}
ScriptValue WorkerScriptController::evaluate(const ScriptSourceCode& sourceCode)
{
if (isExecutionForbidden())
return ScriptValue();
ScriptValue exception;
ScriptValue result(evaluate(sourceCode, &exception));
if (exception.jsValue()) {
JSLock lock(SilenceAssertionsOnly);
reportException(m_workerContextWrapper->globalExec(), exception.jsValue());
}
return result;
}
ScriptValue WorkerScriptController::evaluate(const ScriptSourceCode& sourceCode, ScriptValue* exception)
{
if (isExecutionForbidden())
return ScriptValue();
initScriptIfNeeded();
JSLock lock(SilenceAssertionsOnly);
ExecState* exec = m_workerContextWrapper->globalExec();
m_workerContextWrapper->globalData().timeoutChecker.start();
Completion comp = JSC::evaluate(exec, exec->dynamicGlobalObject()->globalScopeChain(), sourceCode.jsSourceCode(), m_workerContextWrapper.get());
m_workerContextWrapper->globalData().timeoutChecker.stop();
ComplType completionType = comp.complType();
if (completionType == Terminated || m_workerContextWrapper->globalData().terminator.shouldTerminate()) {
forbidExecution();
return ScriptValue();
}
if (completionType == Normal || completionType == ReturnValue)
return ScriptValue(*m_globalData, comp.value());
if (completionType == Throw) {
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, comp.value());
}
return ScriptValue();
}
void WorkerScriptController::setException(ScriptValue exception)
{
throwError(m_workerContextWrapper->globalExec(), exception.jsValue());
}
void WorkerScriptController::scheduleExecutionTermination()
{
m_globalData->terminator.terminateSoon();
}
void WorkerScriptController::forbidExecution()
{
ASSERT(m_workerContext->isContextThread());
m_executionForbidden = true;
}
bool WorkerScriptController::isExecutionForbidden() const
{
ASSERT(m_workerContext->isContextThread());
return m_executionForbidden;
}
}
#endif // ENABLE(WORKERS)