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/*
* Copyright (C) 2017-2021 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 "WasmOMGPlan.h"
#if ENABLE(WEBASSEMBLY_B3JIT)
#include "JITCompilation.h"
#include "LinkBuffer.h"
#include "WasmB3IRGenerator.h"
#include "WasmCallee.h"
#include "WasmCalleeRegistry.h"
#include "WasmIRGeneratorHelpers.h"
#include "WasmNameSection.h"
#include "WasmTypeDefinitionInlines.h"
#include <wtf/DataLog.h>
#include <wtf/Locker.h>
#include <wtf/StdLibExtras.h>
namespace JSC { namespace Wasm {
namespace WasmOMGPlanInternal {
static constexpr bool verbose = false;
}
OMGPlan::OMGPlan(VM& vm, Ref<Module>&& module, uint32_t functionIndex, std::optional<bool> hasExceptionHandlers, MemoryMode mode, CompletionTask&& task)
: Base(vm, const_cast<ModuleInformation&>(module->moduleInformation()), WTFMove(task))
, m_module(WTFMove(module))
, m_calleeGroup(*m_module->calleeGroupFor(mode))
, m_hasExceptionHandlers(hasExceptionHandlers)
, m_functionIndex(functionIndex)
{
ASSERT(Options::useOMGJIT());
setMode(mode);
ASSERT(m_calleeGroup->runnable());
ASSERT(m_calleeGroup.ptr() == m_module->calleeGroupFor(m_mode));
dataLogLnIf(WasmOMGPlanInternal::verbose, "Starting OMG plan for ", functionIndex, " of module: ", RawPointer(&m_module.get()));
}
void OMGPlan::work(CompilationEffort)
{
ASSERT(m_calleeGroup->runnable());
ASSERT(m_calleeGroup.ptr() == m_module->calleeGroupFor(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());
TypeIndex typeIndex = m_moduleInformation->internalFunctionTypeIndices[m_functionIndex];
const TypeDefinition& signature = TypeInformation::get(typeIndex);
Vector<UnlinkedWasmToWasmCall> unlinkedCalls;
CompilationContext context;
auto parseAndCompileResult = parseAndCompileB3(context, function, signature, unlinkedCalls, m_moduleInformation.get(), m_mode, CompilationMode::OMGMode, m_functionIndex, m_hasExceptionHandlers, UINT32_MAX);
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;
}
InternalFunction* internalFunction = parseAndCompileResult->get();
Vector<CodeLocationLabel<ExceptionHandlerPtrTag>> exceptionHandlerLocations;
computeExceptionHandlerLocations(exceptionHandlerLocations, internalFunction, context, linkBuffer);
computePCToCodeOriginMap(context, linkBuffer);
omgEntrypoint.compilation = makeUnique<Compilation>(
FINALIZE_CODE_IF(context.procedure->shouldDumpIR() || shouldDumpDisassemblyFor(CompilationMode::OMGMode), linkBuffer, JITCompilationPtrTag, "WebAssembly OMG 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(internalFunction->entrypoint.calleeSaveRegisters);
MacroAssemblerCodePtr<WasmEntryPtrTag> entrypoint;
{
ASSERT(m_calleeGroup.ptr() == m_module->calleeGroupFor(mode()));
Ref<OMGCallee> callee = OMGCallee::create(WTFMove(omgEntrypoint), functionIndexSpace, m_moduleInformation->nameSection->get(functionIndexSpace), WTFMove(unlinkedCalls), WTFMove(internalFunction->stackmaps), WTFMove(internalFunction->exceptionHandlers), WTFMove(exceptionHandlerLocations));
for (auto& moveLocation : internalFunction->calleeMoveLocations)
MacroAssembler::repatchPointer(moveLocation, CalleeBits::boxWasm(callee.ptr()));
entrypoint = callee->entrypoint();
if (context.pcToCodeOriginMap)
CalleeRegistry::singleton().addPCToCodeOriginMap(callee.ptr(), WTFMove(context.pcToCodeOriginMap));
// We want to make sure we publish our callee at the same time as we link our callsites. This enables us to ensure we
// always call the fastest code. Any function linked after us will see our new code and the new callsites, which they
// will update. It's also ok if they publish their code before we reset the instruction caches because after we release
// the lock our code is ready to be published too.
Locker locker { m_calleeGroup->m_lock };
m_calleeGroup->setOMGCallee(locker, m_functionIndex, callee.copyRef());
for (auto& call : callee->wasmToWasmCallsites()) {
MacroAssemblerCodePtr<WasmEntryPtrTag> entrypoint;
if (call.functionIndexSpace < m_module->moduleInformation().importFunctionCount())
entrypoint = m_calleeGroup->m_wasmToWasmExitStubs[call.functionIndexSpace].code();
else
entrypoint = m_calleeGroup->wasmEntrypointCalleeFromFunctionIndexSpace(locker, call.functionIndexSpace).entrypoint().retagged<WasmEntryPtrTag>();
MacroAssembler::repatchNearCall(call.callLocation, CodeLocationLabel<WasmEntryPtrTag>(entrypoint));
}
Plan::updateCallSitesToCallUs(locker, m_calleeGroup, CodeLocationLabel<WasmEntryPtrTag>(entrypoint), m_functionIndex, functionIndexSpace);
{
if (BBQCallee* bbqCallee = m_calleeGroup->bbqCallee(locker, m_functionIndex)) {
Locker locker { bbqCallee->tierUpCount()->getLock() };
bbqCallee->setReplacement(callee.copyRef());
bbqCallee->tierUpCount()->m_compilationStatusForOMG = TierUpCount::CompilationStatus::Compiled;
}
if (m_calleeGroup->m_llintCallees) {
LLIntCallee& llintCallee = m_calleeGroup->m_llintCallees->at(m_functionIndex).get();
Locker locker { llintCallee.tierUpCounter().m_lock };
llintCallee.setReplacement(callee.copyRef(), mode());
llintCallee.tierUpCounter().m_compilationStatus = LLIntTierUpCounter::CompilationStatus::Compiled;
}
}
}
dataLogLnIf(WasmOMGPlanInternal::verbose, "Finished OMG ", m_functionIndex);
Locker locker { m_lock };
complete();
}
} } // namespace JSC::Wasm
#endif // ENABLE(WEBASSEMBLY_B3JIT)
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