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/*
* Copyright (C) 2016-2020 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 "WasmPlan.h"
#if ENABLE(WEBASSEMBLY)
#include "WasmCallee.h"
#include "WasmCalleeGroup.h"
#include "WasmMachineThreads.h"
#include <wtf/DataLog.h>
#include <wtf/Locker.h>
#include <wtf/StdLibExtras.h>
#include <wtf/StringPrintStream.h>
#include <wtf/SystemTracing.h>
namespace JSC { namespace Wasm {
namespace WasmPlanInternal {
static constexpr bool verbose = false;
}
Plan::Plan(VM& vm, Ref<ModuleInformation> info, CompletionTask&& task)
: m_moduleInformation(WTFMove(info))
{
m_completionTasks.append(std::make_pair(&vm, WTFMove(task)));
}
Plan::Plan(VM& vm, CompletionTask&& task)
: m_moduleInformation(ModuleInformation::create())
{
m_completionTasks.append(std::make_pair(&vm, WTFMove(task)));
}
void Plan::runCompletionTasks()
{
ASSERT(isComplete() && !hasWork());
for (auto& task : m_completionTasks)
task.second->run(*this);
m_completionTasks.clear();
m_completed.notifyAll();
}
bool Plan::addCompletionTaskIfNecessary(VM& vm, CompletionTask&& task)
{
Locker locker { m_lock };
if (!isComplete()) {
m_completionTasks.append(std::make_pair(&vm, WTFMove(task)));
return true;
}
return false;
}
void Plan::waitForCompletion()
{
Locker locker { m_lock };
if (!isComplete()) {
m_completed.wait(m_lock);
}
}
bool Plan::tryRemoveContextAndCancelIfLast(VM& vm)
{
Locker locker { m_lock };
if (ASSERT_ENABLED) {
// We allow the first completion task to not have a VM.
for (unsigned i = 1; i < m_completionTasks.size(); ++i)
ASSERT(m_completionTasks[i].first);
}
bool removedAnyTasks = false;
m_completionTasks.removeAllMatching([&] (const std::pair<VM*, CompletionTask>& pair) {
bool shouldRemove = pair.first == &vm;
removedAnyTasks |= shouldRemove;
return shouldRemove;
});
if (!removedAnyTasks)
return false;
if (isComplete()) {
// We trivially cancel anything that's completed.
return true;
}
// FIXME: Make 0 index not so magical: https://bugs.webkit.org/show_bug.cgi?id=171395
if (m_completionTasks.isEmpty() || (m_completionTasks.size() == 1 && !m_completionTasks[0].first)) {
fail("WebAssembly Plan was cancelled. If you see this error message please file a bug at bugs.webkit.org!"_s);
return true;
}
return false;
}
void Plan::fail(String&& errorMessage, Error error)
{
if (failed())
return;
ASSERT(errorMessage);
dataLogLnIf(WasmPlanInternal::verbose, "failing with message: ", errorMessage);
m_errorMessage = WTFMove(errorMessage);
m_error = error;
complete();
}
Plan::~Plan() = default;
CString Plan::signpostMessage(CompilationMode compilationMode, uint32_t functionIndexSpace) const
{
CString signpostMessage;
const FunctionData& function = m_moduleInformation->functions[functionIndexSpace - m_moduleInformation->importFunctionTypeIndices.size()];
StringPrintStream stream;
stream.print(compilationMode, " ", makeString(IndexOrName(functionIndexSpace, m_moduleInformation->nameSection->get(functionIndexSpace))), " instructions size = ", function.data.size());
return stream.toCString();
}
void Plan::beginCompilerSignpost(CompilationMode compilationMode, uint32_t functionIndexSpace) const
{
if (UNLIKELY(Options::useCompilerSignpost())) {
auto message = signpostMessage(compilationMode, functionIndexSpace);
WTFBeginSignpost(this, JSCJITCompiler, "%" PUBLIC_LOG_STRING, message.data() ? message.data() : "(nullptr)");
}
}
void Plan::beginCompilerSignpost(const Callee& callee) const
{
beginCompilerSignpost(callee.compilationMode(), callee.index());
}
void Plan::endCompilerSignpost(CompilationMode compilationMode, uint32_t functionIndexSpace) const
{
if (UNLIKELY(Options::useCompilerSignpost())) {
auto message = signpostMessage(compilationMode, functionIndexSpace);
WTFEndSignpost(this, JSCJITCompiler, "%" PUBLIC_LOG_STRING, message.data() ? message.data() : "(nullptr)");
}
}
void Plan::endCompilerSignpost(const Callee& callee) const
{
endCompilerSignpost(callee.compilationMode(), callee.index());
}
} } // namespace JSC::Wasm
#endif // ENABLE(WEBASSEMBLY)
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