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/*
* Copyright (C) 2019-2021 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.
*/
#include "config.h"
#include "WasmOMGForOSREntryPlan.h"
#if ENABLE(WEBASSEMBLY_B3JIT)
#include "JITCompilation.h"
#include "LinkBuffer.h"
#include "WasmB3IRGenerator.h"
#include "WasmCallee.h"
#include "WasmMachineThreads.h"
#include "WasmNameSection.h"
#include "WasmSignatureInlines.h"
#include <wtf/DataLog.h>
#include <wtf/Locker.h>
#include <wtf/StdLibExtras.h>
namespace JSC { namespace Wasm {
namespace WasmOMGForOSREntryPlanInternal {
static constexpr bool verbose = false;
}
OMGForOSREntryPlan::OMGForOSREntryPlan(Context* context, Ref<Module>&& module, Ref<Callee>&& callee, uint32_t functionIndex, uint32_t loopIndex, MemoryMode mode, CompletionTask&& task)
: Base(context, makeRef(const_cast<ModuleInformation&>(module->moduleInformation())), WTFMove(task))
, m_module(WTFMove(module))
, m_codeBlock(*m_module->codeBlockFor(mode))
, m_callee(WTFMove(callee))
, m_functionIndex(functionIndex)
, m_loopIndex(loopIndex)
{
ASSERT(Options::useOMGJIT());
setMode(mode);
ASSERT(m_codeBlock->runnable());
ASSERT(m_codeBlock.ptr() == m_module->codeBlockFor(m_mode));
dataLogLnIf(WasmOMGForOSREntryPlanInternal::verbose, "Starting OMGForOSREntry plan for ", functionIndex, " of module: ", RawPointer(&m_module.get()));
}
void OMGForOSREntryPlan::work(CompilationEffort)
{
ASSERT(m_codeBlock->runnable());
ASSERT(m_codeBlock.ptr() == m_module->codeBlockFor(mode()));
const FunctionData& function = m_moduleInformation->functions[m_functionIndex];
const uint32_t functionIndexSpace = m_functionIndex + m_module->moduleInformation().importFunctionCount();
ASSERT(functionIndexSpace < m_module->moduleInformation().functionIndexSpaceSize());
SignatureIndex signatureIndex = m_moduleInformation->internalFunctionSignatureIndices[m_functionIndex];
const Signature& signature = SignatureInformation::get(signatureIndex);
Vector<UnlinkedWasmToWasmCall> unlinkedCalls;
CompilationContext context;
unsigned osrEntryScratchBufferSize = 0;
auto parseAndCompileResult = parseAndCompile(context, function, signature, unlinkedCalls, osrEntryScratchBufferSize, m_moduleInformation.get(), m_mode, CompilationMode::OMGForOSREntryMode, m_functionIndex, m_loopIndex);
if (UNLIKELY(!parseAndCompileResult)) {
Locker locker { m_lock };
fail(makeString(parseAndCompileResult.error(), "when trying to tier up ", String::number(m_functionIndex)));
return;
}
Entrypoint omgEntrypoint;
LinkBuffer linkBuffer(*context.wasmEntrypointJIT, nullptr, LinkBuffer::Profile::Wasm, JITCompilationCanFail);
if (UNLIKELY(linkBuffer.didFailToAllocate())) {
Locker locker { m_lock };
Base::fail(makeString("Out of executable memory while tiering up function at index ", String::number(m_functionIndex)));
return;
}
omgEntrypoint.compilation = makeUnique<Compilation>(
FINALIZE_WASM_CODE_FOR_MODE(CompilationMode::OMGForOSREntryMode, linkBuffer, JITCompilationPtrTag, "WebAssembly OMGForOSREntry function[%i] %s name %s", m_functionIndex, signature.toString().ascii().data(), makeString(IndexOrName(functionIndexSpace, m_moduleInformation->nameSection->get(functionIndexSpace))).ascii().data()),
WTFMove(context.wasmEntrypointByproducts));
omgEntrypoint.calleeSaveRegisters = WTFMove(parseAndCompileResult.value()->entrypoint.calleeSaveRegisters);
ASSERT(m_codeBlock.ptr() == m_module->codeBlockFor(mode()));
Ref<OMGForOSREntryCallee> callee = OMGForOSREntryCallee::create(WTFMove(omgEntrypoint), functionIndexSpace, m_moduleInformation->nameSection->get(functionIndexSpace), osrEntryScratchBufferSize, m_loopIndex, WTFMove(unlinkedCalls));
{
MacroAssembler::repatchPointer(parseAndCompileResult.value()->calleeMoveLocation, CalleeBits::boxWasm(callee.ptr()));
Locker locker { m_codeBlock->m_lock };
for (auto& call : callee->wasmToWasmCallsites()) {
MacroAssemblerCodePtr<WasmEntryPtrTag> entrypoint;
if (call.functionIndexSpace < m_module->moduleInformation().importFunctionCount())
entrypoint = m_codeBlock->m_wasmToWasmExitStubs[call.functionIndexSpace].code();
else
entrypoint = m_codeBlock->wasmEntrypointCalleeFromFunctionIndexSpace(call.functionIndexSpace).entrypoint().retagged<WasmEntryPtrTag>();
MacroAssembler::repatchNearCall(call.callLocation, CodeLocationLabel<WasmEntryPtrTag>(entrypoint));
}
resetInstructionCacheOnAllThreads();
WTF::storeStoreFence();
{
switch (m_callee->compilationMode()) {
case CompilationMode::LLIntMode: {
LLIntCallee* llintCallee = static_cast<LLIntCallee*>(m_callee.ptr());
Locker locker { llintCallee->tierUpCounter().m_lock };
llintCallee->setOSREntryCallee(callee.copyRef(), mode());
llintCallee->tierUpCounter().m_loopCompilationStatus = LLIntTierUpCounter::CompilationStatus::Compiled;
break;
}
case CompilationMode::BBQMode: {
BBQCallee* bbqCallee = static_cast<BBQCallee*>(m_callee.ptr());
Locker locker { bbqCallee->tierUpCount()->getLock() };
bbqCallee->setOSREntryCallee(callee.copyRef(), mode());
bbqCallee->tierUpCount()->osrEntryTriggers()[m_loopIndex] = TierUpCount::TriggerReason::CompilationDone;
bbqCallee->tierUpCount()->m_compilationStatusForOMGForOSREntry = TierUpCount::CompilationStatus::Compiled;
break;
}
default:
RELEASE_ASSERT_NOT_REACHED();
}
}
}
dataLogLnIf(WasmOMGForOSREntryPlanInternal::verbose, "Finished OMGForOSREntry ", m_functionIndex);
Locker locker { m_lock };
complete();
}
} } // namespace JSC::Wasm
#endif // ENABLE(WEBASSEMBLY_B3JIT)
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