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/*
* Copyright (C) 2017-2018 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 "WasmCalleeGroup.h"
#if ENABLE(WEBASSEMBLY)
#include "LinkBuffer.h"
#include "WasmBBQPlan.h"
#include "WasmCallee.h"
#include "WasmLLIntPlan.h"
#include "WasmWorklist.h"
namespace JSC { namespace Wasm {
Ref<CalleeGroup> CalleeGroup::create(VM& vm, MemoryMode mode, ModuleInformation& moduleInformation, RefPtr<LLIntCallees> llintCallees)
{
return adoptRef(*new CalleeGroup(vm, mode, moduleInformation, llintCallees));
}
Ref<CalleeGroup> CalleeGroup::createFromExisting(MemoryMode mode, const CalleeGroup& other)
{
return adoptRef(*new CalleeGroup(mode, other));
}
CalleeGroup::CalleeGroup(MemoryMode mode, const CalleeGroup& other)
: m_calleeCount(other.m_calleeCount)
, m_mode(mode)
, m_llintCallees(other.m_llintCallees)
, m_embedderCallees(other.m_embedderCallees)
, m_wasmIndirectCallEntryPoints(other.m_wasmIndirectCallEntryPoints)
, m_wasmToWasmCallsites(other.m_wasmToWasmCallsites)
, m_wasmToWasmExitStubs(other.m_wasmToWasmExitStubs)
{
setCompilationFinished();
}
CalleeGroup::CalleeGroup(VM& vm, MemoryMode mode, ModuleInformation& moduleInformation, RefPtr<LLIntCallees> llintCallees)
: m_calleeCount(moduleInformation.internalFunctionCount())
, m_mode(mode)
, m_llintCallees(llintCallees)
{
RefPtr<CalleeGroup> protectedThis = this;
if (Options::useWasmLLInt()) {
m_plan = adoptRef(*new LLIntPlan(vm, moduleInformation, m_llintCallees->data(), createSharedTask<Plan::CallbackType>([this, protectedThis = WTFMove(protectedThis)] (Plan&) {
Locker locker { m_lock };
if (m_plan->failed()) {
m_errorMessage = m_plan->errorMessage();
setCompilationFinished();
return;
}
m_wasmIndirectCallEntryPoints = FixedVector<MacroAssemblerCodePtr<WasmEntryPtrTag>>(m_calleeCount);
for (unsigned i = 0; i < m_calleeCount; ++i)
m_wasmIndirectCallEntryPoints[i] = m_llintCallees->at(i)->entrypoint();
m_wasmToWasmExitStubs = m_plan->takeWasmToWasmExitStubs();
m_wasmToWasmCallsites = m_plan->takeWasmToWasmCallsites();
m_embedderCallees = static_cast<LLIntPlan*>(m_plan.get())->takeEmbedderCallees();
setCompilationFinished();
})));
}
#if ENABLE(WEBASSEMBLY_B3JIT)
else {
m_plan = adoptRef(*new BBQPlan(vm, moduleInformation, CompilerMode::FullCompile, createSharedTask<Plan::CallbackType>([this, protectedThis = WTFMove(protectedThis)] (Plan&) {
Locker locker { m_lock };
if (m_plan->failed()) {
m_errorMessage = m_plan->errorMessage();
setCompilationFinished();
return;
}
m_wasmIndirectCallEntryPoints = FixedVector<MacroAssemblerCodePtr<WasmEntryPtrTag>>(m_calleeCount);
BBQPlan* bbqPlan = static_cast<BBQPlan*>(m_plan.get());
bbqPlan->initializeCallees([&] (unsigned calleeIndex, RefPtr<EmbedderEntrypointCallee>&& embedderEntrypointCallee, RefPtr<BBQCallee>&& wasmEntrypoint) {
if (embedderEntrypointCallee) {
auto result = m_embedderCallees.set(calleeIndex, WTFMove(embedderEntrypointCallee));
ASSERT_UNUSED(result, result.isNewEntry);
}
m_wasmIndirectCallEntryPoints[calleeIndex] = wasmEntrypoint->entrypoint();
setBBQCallee(locker, calleeIndex, adoptRef(*static_cast<BBQCallee*>(wasmEntrypoint.leakRef())));
});
m_wasmToWasmExitStubs = m_plan->takeWasmToWasmExitStubs();
m_wasmToWasmCallsites = m_plan->takeWasmToWasmCallsites();
setCompilationFinished();
})));
}
#endif
m_plan->setMode(mode);
auto& worklist = Wasm::ensureWorklist();
// Note, immediately after we enqueue the plan, there is a chance the above callback will be called.
worklist.enqueue(*m_plan.get());
}
CalleeGroup::~CalleeGroup() { }
void CalleeGroup::waitUntilFinished()
{
RefPtr<Plan> plan;
{
Locker locker { m_lock };
plan = m_plan;
}
if (plan) {
auto& worklist = Wasm::ensureWorklist();
worklist.completePlanSynchronously(*plan.get());
}
// else, if we don't have a plan, we're already compiled.
}
void CalleeGroup::compileAsync(VM& vm, AsyncCompilationCallback&& task)
{
RefPtr<Plan> plan;
{
Locker locker { m_lock };
plan = m_plan;
}
if (plan) {
// We don't need to keep a RefPtr on the Plan because the worklist will keep
// a RefPtr on the Plan until the plan finishes notifying all of its callbacks.
RefPtr<CalleeGroup> protectedThis = this;
plan->addCompletionTask(vm, createSharedTask<Plan::CallbackType>([this, task = WTFMove(task), protectedThis = WTFMove(protectedThis)] (Plan&) {
task->run(Ref { *this });
}));
} else
task->run(Ref { *this });
}
bool CalleeGroup::isSafeToRun(MemoryMode memoryMode)
{
UNUSED_PARAM(memoryMode);
if (!runnable())
return false;
switch (m_mode) {
case Wasm::MemoryMode::BoundsChecking:
return true;
#if ENABLE(WEBASSEMBLY_SIGNALING_MEMORY)
case Wasm::MemoryMode::Signaling:
// Code being in Signaling mode means that it performs no bounds checks.
// Its memory, even if empty, absolutely must also be in Signaling mode
// because the page protection detects out-of-bounds accesses.
return memoryMode == Wasm::MemoryMode::Signaling;
#endif
}
RELEASE_ASSERT_NOT_REACHED();
return false;
}
void CalleeGroup::setCompilationFinished()
{
m_plan = nullptr;
m_compilationFinished.store(true);
}
} } // namespace JSC::Wasm
#endif // ENABLE(WEBASSEMBLY)
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