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Copy pathAccessCaseSnippetParams.cpp
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125 lines (103 loc) · 5.21 KB
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/*
* Copyright (C) 2016 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.
*/
#include "config.h"
#include "AccessCaseSnippetParams.h"
#include "LinkBuffer.h"
#include "PolymorphicAccess.h"
#include "StructureStubInfo.h"
#if ENABLE(JIT)
namespace JSC {
template<typename JumpType, typename FunctionType, typename ResultType, typename... Arguments>
class SlowPathCallGeneratorWithArguments : public AccessCaseSnippetParams::SlowPathCallGenerator {
public:
SlowPathCallGeneratorWithArguments(JumpType from, CCallHelpers::Label to, FunctionType function, ResultType result, std::tuple<Arguments...> arguments)
: m_from(from)
, m_to(to)
, m_function(function)
, m_result(result)
, m_arguments(arguments)
{
}
template<size_t... ArgumentsIndex>
CCallHelpers::JumpList generateImpl(AccessGenerationState& state, const RegisterSet& usedRegistersBySnippet, CCallHelpers& jit, std::index_sequence<ArgumentsIndex...>)
{
CCallHelpers::JumpList exceptions;
// We spill (1) the used registers by IC and (2) the used registers by Snippet.
AccessGenerationState::SpillState spillState = state.preserveLiveRegistersToStackForCall(usedRegistersBySnippet);
jit.store32(
CCallHelpers::TrustedImm32(state.callSiteIndexForExceptionHandlingOrOriginal().bits()),
CCallHelpers::tagFor(static_cast<VirtualRegister>(CallFrameSlot::argumentCount)));
jit.makeSpaceOnStackForCCall();
// FIXME: Currently, we do not check any ARM EABI things here.
// But it is OK because a compile error happens when you pass JSValueRegs as an argument.
// https://bugs.webkit.org/show_bug.cgi?id=163099
jit.setupArgumentsWithExecState(std::get<ArgumentsIndex>(m_arguments)...);
CCallHelpers::Call operationCall = jit.call();
auto function = m_function;
jit.addLinkTask([=] (LinkBuffer& linkBuffer) {
linkBuffer.link(operationCall, FunctionPtr(function));
});
jit.setupResults(m_result);
jit.reclaimSpaceOnStackForCCall();
CCallHelpers::Jump noException = jit.emitExceptionCheck(state.m_vm, CCallHelpers::InvertedExceptionCheck);
state.restoreLiveRegistersFromStackForCallWithThrownException(spillState);
exceptions.append(jit.jump());
noException.link(&jit);
RegisterSet dontRestore;
dontRestore.set(m_result);
state.restoreLiveRegistersFromStackForCall(spillState, dontRestore);
return exceptions;
}
CCallHelpers::JumpList generate(AccessGenerationState& state, const RegisterSet& usedRegistersBySnippet, CCallHelpers& jit) override
{
m_from.link(&jit);
CCallHelpers::JumpList exceptions = generateImpl(state, usedRegistersBySnippet, jit, std::make_index_sequence<std::tuple_size<std::tuple<Arguments...>>::value>());
jit.jump().linkTo(m_to, &jit);
return exceptions;
}
protected:
JumpType m_from;
CCallHelpers::Label m_to;
FunctionType m_function;
ResultType m_result;
std::tuple<Arguments...> m_arguments;
};
#define JSC_DEFINE_CALL_OPERATIONS(OperationType, ResultType, ...) \
void AccessCaseSnippetParams::addSlowPathCallImpl(CCallHelpers::JumpList from, CCallHelpers& jit, OperationType operation, ResultType result, std::tuple<__VA_ARGS__> args) \
{ \
CCallHelpers::Label to = jit.label(); \
m_generators.append(std::make_unique<SlowPathCallGeneratorWithArguments<CCallHelpers::JumpList, OperationType, ResultType, __VA_ARGS__>>(from, to, operation, result, args)); \
} \
SNIPPET_SLOW_PATH_CALLS(JSC_DEFINE_CALL_OPERATIONS)
#undef JSC_DEFINE_CALL_OPERATIONS
CCallHelpers::JumpList AccessCaseSnippetParams::emitSlowPathCalls(AccessGenerationState& state, const RegisterSet& usedRegistersBySnippet, CCallHelpers& jit)
{
CCallHelpers::JumpList exceptions;
for (auto& generator : m_generators)
exceptions.append(generator->generate(state, usedRegistersBySnippet, jit));
return exceptions;
}
}
#endif