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/*
* Copyright (C) 2020-2021 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.
*/
#pragma once
#include "Options.h"
#include <wtf/HashMap.h>
#include <wtf/NeverDestroyed.h>
#include <wtf/PtrTag.h>
namespace JSC {
#if ENABLE(JIT_OPERATION_VALIDATION)
// This indirection is provided so that we can manually force on assertions for
// testing even on release builds.
#define JIT_OPERATION_VALIDATION_ASSERT_ENABLED ASSERT_ENABLED
struct JITOperationAnnotation;
class JITOperationList {
public:
static JITOperationList& instance();
static void initialize();
template<typename PtrType>
void* map(PtrType pointer) const
{
return m_validatedOperations.get(removeCodePtrTag(bitwise_cast<void*>(pointer)));
}
#if JIT_OPERATION_VALIDATION_ASSERT_ENABLED
template<typename PtrType>
void* inverseMap(PtrType pointer) const
{
return m_validatedOperationsInverseMap.get(bitwise_cast<void*>(pointer));
}
#endif
static void populatePointersInJavaScriptCore();
static void populatePointersInJavaScriptCoreForLLInt();
JS_EXPORT_PRIVATE static void populatePointersInEmbedder(const JITOperationAnnotation* beginOperations, const JITOperationAnnotation* endOperations);
template<typename T> static void assertIsJITOperation(T function)
{
UNUSED_PARAM(function);
#if JIT_OPERATION_VALIDATION_ASSERT_ENABLED
RELEASE_ASSERT(!Options::useJIT() || JITOperationList::instance().map(function));
#endif
}
template<typename T> static void assertIsJITOperationWithValidation(T function)
{
UNUSED_PARAM(function);
#if JIT_OPERATION_VALIDATION_ASSERT_ENABLED
RELEASE_ASSERT(!Options::useJIT() || JITOperationList::instance().inverseMap(function));
#endif
}
private:
ALWAYS_INLINE void addPointers(const JITOperationAnnotation* begin, const JITOperationAnnotation* end);
#if JIT_OPERATION_VALIDATION_ASSERT_ENABLED
void addInverseMap(void* validationEntry, void* pointer);
#endif
HashMap<void*, void*> m_validatedOperations;
#if JIT_OPERATION_VALIDATION_ASSERT_ENABLED
HashMap<void*, void*> m_validatedOperationsInverseMap;
#endif
};
JS_EXPORT_PRIVATE extern LazyNeverDestroyed<JITOperationList> jitOperationList;
inline JITOperationList& JITOperationList::instance()
{
return jitOperationList.get();
}
#else // not ENABLE(JIT_OPERATION_VALIDATION)
class JITOperationList {
public:
static void initialize() { }
static void populatePointersInJavaScriptCore() { }
static void populatePointersInJavaScriptCoreForLLInt() { }
template<typename T> static void assertIsJITOperation(T) { }
template<typename T> static void assertIsJITOperationWithValidation(T) { }
};
#endif // ENABLE(JIT_OPERATION_VALIDATION)
} // namespace JSC
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