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/*
* Copyright (C) 2010 Google Inc. All rights reserved.
* Copyright (C) 2016-2017 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. AND ITS CONTRIBUTORS ``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 ITS 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.
*/
#pragma once
#include "CustomElementReactionQueue.h"
#include "JSDOMBinding.h"
#include "ThreadGlobalData.h"
#include <JavaScriptCore/CatchScope.h>
#include <JavaScriptCore/Completion.h>
#include <JavaScriptCore/Microtask.h>
#include <wtf/ForbidHeapAllocation.h>
#include <wtf/MainThread.h>
namespace WebCore {
class ScriptExecutionContext;
class JSExecState {
WTF_MAKE_NONCOPYABLE(JSExecState);
WTF_FORBID_HEAP_ALLOCATION;
friend class JSMainThreadNullState;
public:
static JSC::JSGlobalObject* currentState()
{
return threadGlobalData().currentState();
};
static JSC::JSValue call(JSC::JSGlobalObject* lexicalGlobalObject, JSC::JSValue functionObject, const JSC::CallData& callData, JSC::JSValue thisValue, const JSC::ArgList& args, NakedPtr<JSC::Exception>& returnedException)
{
JSExecState currentState(lexicalGlobalObject);
return JSC::call(lexicalGlobalObject, functionObject, callData, thisValue, args, returnedException);
};
static JSC::JSValue evaluate(JSC::JSGlobalObject* lexicalGlobalObject, const JSC::SourceCode& source, JSC::JSValue thisValue, NakedPtr<JSC::Exception>& returnedException)
{
JSExecState currentState(lexicalGlobalObject);
return JSC::evaluate(lexicalGlobalObject, source, thisValue, returnedException);
};
static JSC::JSValue evaluate(JSC::JSGlobalObject* lexicalGlobalObject, const JSC::SourceCode& source, JSC::JSValue thisValue = JSC::JSValue())
{
NakedPtr<JSC::Exception> unused;
return evaluate(lexicalGlobalObject, source, thisValue, unused);
};
static JSC::JSValue profiledCall(JSC::JSGlobalObject* lexicalGlobalObject, JSC::ProfilingReason reason, JSC::JSValue functionObject, const JSC::CallData& callData, JSC::JSValue thisValue, const JSC::ArgList& args, NakedPtr<JSC::Exception>& returnedException)
{
JSExecState currentState(lexicalGlobalObject);
return JSC::profiledCall(lexicalGlobalObject, reason, functionObject, callData, thisValue, args, returnedException);
}
static JSC::JSValue profiledEvaluate(JSC::JSGlobalObject* lexicalGlobalObject, JSC::ProfilingReason reason, const JSC::SourceCode& source, JSC::JSValue thisValue, NakedPtr<JSC::Exception>& returnedException)
{
JSExecState currentState(lexicalGlobalObject);
return JSC::profiledEvaluate(lexicalGlobalObject, reason, source, thisValue, returnedException);
}
static JSC::JSValue profiledEvaluate(JSC::JSGlobalObject* lexicalGlobalObject, JSC::ProfilingReason reason, const JSC::SourceCode& source, JSC::JSValue thisValue = JSC::JSValue())
{
NakedPtr<JSC::Exception> unused;
return profiledEvaluate(lexicalGlobalObject, reason, source, thisValue, unused);
}
static void runTask(JSC::JSGlobalObject* lexicalGlobalObject, JSC::Microtask& task)
{
JSExecState currentState(lexicalGlobalObject);
task.run(lexicalGlobalObject);
}
static JSC::JSInternalPromise& loadModule(JSC::JSGlobalObject& lexicalGlobalObject, const String& moduleName, JSC::JSValue parameters, JSC::JSValue scriptFetcher)
{
JSExecState currentState(&lexicalGlobalObject);
return *JSC::loadModule(&lexicalGlobalObject, moduleName, parameters, scriptFetcher);
}
static JSC::JSInternalPromise& loadModule(JSC::JSGlobalObject& lexicalGlobalObject, const JSC::SourceCode& sourceCode, JSC::JSValue scriptFetcher)
{
JSExecState currentState(&lexicalGlobalObject);
return *JSC::loadModule(&lexicalGlobalObject, sourceCode, scriptFetcher);
}
static JSC::JSValue linkAndEvaluateModule(JSC::JSGlobalObject& lexicalGlobalObject, const JSC::Identifier& moduleKey, JSC::JSValue scriptFetcher, NakedPtr<JSC::Exception>& returnedException)
{
JSC::VM& vm = JSC::getVM(&lexicalGlobalObject);
auto scope = DECLARE_CATCH_SCOPE(vm);
JSExecState currentState(&lexicalGlobalObject);
auto returnValue = JSC::linkAndEvaluateModule(&lexicalGlobalObject, moduleKey, scriptFetcher);
if (UNLIKELY(scope.exception())) {
returnedException = scope.exception();
scope.clearException();
return JSC::jsUndefined();
}
return returnValue;
}
static void instrumentFunction(ScriptExecutionContext*, const JSC::CallData&);
private:
explicit JSExecState(JSC::JSGlobalObject* lexicalGlobalObject)
: m_previousState(currentState())
, m_lock(lexicalGlobalObject)
{
setCurrentState(lexicalGlobalObject);
};
~JSExecState()
{
JSC::VM& vm = currentState()->vm();
auto scope = DECLARE_CATCH_SCOPE(vm);
scope.assertNoException();
JSC::JSGlobalObject* lexicalGlobalObject = currentState();
bool didExitJavaScript = lexicalGlobalObject && !m_previousState;
setCurrentState(m_previousState);
if (didExitJavaScript) {
didLeaveScriptContext(lexicalGlobalObject);
// We need to clear any exceptions from microtask drain.
scope.clearException();
}
}
static void setCurrentState(JSC::JSGlobalObject* lexicalGlobalObject)
{
threadGlobalData().setCurrentState(lexicalGlobalObject);
}
JSC::JSGlobalObject* m_previousState;
JSC::JSLockHolder m_lock;
static void didLeaveScriptContext(JSC::JSGlobalObject*);
};
// Null lexicalGlobalObject prevents origin security checks.
// Used by non-JavaScript bindings (ObjC, GObject).
class JSMainThreadNullState {
WTF_MAKE_NONCOPYABLE(JSMainThreadNullState);
WTF_FORBID_HEAP_ALLOCATION;
public:
explicit JSMainThreadNullState()
: m_previousState(JSExecState::currentState())
, m_customElementReactionStack(m_previousState)
{
ASSERT(isMainThread());
JSExecState::setCurrentState(nullptr);
}
~JSMainThreadNullState()
{
ASSERT(isMainThread());
JSExecState::setCurrentState(m_previousState);
}
private:
JSC::JSGlobalObject* m_previousState;
CustomElementReactionStack m_customElementReactionStack;
};
JSC::JSValue functionCallHandlerFromAnyThread(JSC::JSGlobalObject*, JSC::JSValue functionObject, const JSC::CallData&, JSC::JSValue thisValue, const JSC::ArgList& args, NakedPtr<JSC::Exception>& returnedException);
JSC::JSValue evaluateHandlerFromAnyThread(JSC::JSGlobalObject*, const JSC::SourceCode&, JSC::JSValue thisValue, NakedPtr<JSC::Exception>& returnedException);
} // namespace WebCore