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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "threading/ProtectedData.h"
#include "gc/Zone.h"
#include "vm/HelperThreads.h"
#include "vm/JSContext.h"
namespace js {
#ifdef JS_HAS_PROTECTED_DATA_CHECKS
/* static */ mozilla::Atomic<size_t, mozilla::SequentiallyConsistent>
AutoNoteSingleThreadedRegion::count(0);
template <AllowedHelperThread Helper>
static inline bool OnHelperThread() {
if (Helper == AllowedHelperThread::IonCompile ||
Helper == AllowedHelperThread::GCTaskOrIonCompile) {
if (CurrentThreadIsIonCompiling()) {
return true;
}
}
if (Helper == AllowedHelperThread::GCTask ||
Helper == AllowedHelperThread::GCTaskOrIonCompile) {
JSContext* cx = TlsContext.get();
if (cx->defaultFreeOp()->isCollecting()) {
return true;
}
}
return false;
}
void CheckThreadLocal::check() const {
JSContext* cx = TlsContext.get();
MOZ_ASSERT(cx);
MOZ_ASSERT_IF(cx->isMainThreadContext(),
CurrentThreadCanAccessRuntime(cx->runtime()));
MOZ_ASSERT(id == ThreadId::ThisThreadId());
}
void CheckContextLocal::check() const {
if (!cx_->isInitialized()) {
return;
}
JSContext* cx = TlsContext.get();
MOZ_ASSERT(cx);
MOZ_ASSERT_IF(cx->isMainThreadContext(),
CurrentThreadCanAccessRuntime(cx->runtime()));
MOZ_ASSERT(cx_ == cx);
}
template <AllowedHelperThread Helper>
void CheckMainThread<Helper>::check() const {
if (OnHelperThread<Helper>()) {
return;
}
JSContext* cx = TlsContext.get();
MOZ_ASSERT(CurrentThreadCanAccessRuntime(cx->runtime()));
}
template class CheckMainThread<AllowedHelperThread::None>;
template class CheckMainThread<AllowedHelperThread::GCTask>;
template class CheckMainThread<AllowedHelperThread::IonCompile>;
template <AllowedHelperThread Helper>
void CheckZone<Helper>::check() const {
if (OnHelperThread<Helper>()) {
return;
}
if (zone->usedByHelperThread()) {
// This may only be accessed by the helper thread using this zone.
MOZ_ASSERT(zone->ownedByCurrentHelperThread());
} else {
// The main thread is permitted access to all zones. These accesses
// are threadsafe if the zone is not in use by a helper thread.
MOZ_ASSERT(CurrentThreadCanAccessRuntime(TlsContext.get()->runtime()));
}
}
template class CheckZone<AllowedHelperThread::None>;
template class CheckZone<AllowedHelperThread::GCTask>;
template class CheckZone<AllowedHelperThread::IonCompile>;
template class CheckZone<AllowedHelperThread::GCTaskOrIonCompile>;
template <GlobalLock Lock, AllowedHelperThread Helper>
void CheckGlobalLock<Lock, Helper>::check() const {
if (OnHelperThread<Helper>()) {
return;
}
switch (Lock) {
case GlobalLock::GCLock:
TlsContext.get()->runtime()->gc.assertCurrentThreadHasLockedGC();
break;
case GlobalLock::ScriptDataLock:
TlsContext.get()->runtime()->assertCurrentThreadHasScriptDataAccess();
break;
case GlobalLock::HelperThreadLock:
gHelperThreadLock.assertOwnedByCurrentThread();
break;
}
}
template class CheckGlobalLock<GlobalLock::GCLock, AllowedHelperThread::None>;
template class CheckGlobalLock<GlobalLock::ScriptDataLock,
AllowedHelperThread::None>;
template class CheckGlobalLock<GlobalLock::HelperThreadLock,
AllowedHelperThread::None>;
template <AllowedHelperThread Helper>
void CheckArenaListAccess<Helper>::check() const {
MOZ_ASSERT(zone);
if (OnHelperThread<Helper>()) {
return;
}
JSRuntime* rt = TlsContext.get()->runtime();
if (zone->isAtomsZone()) {
// The main thread can access the atoms arenas if it holds all the atoms
// table locks.
if (rt->currentThreadHasAtomsTableAccess()) {
return;
}
// Otherwise we must hold the GC lock if parallel parsing is running.
if (rt->isOffThreadParseRunning()) {
rt->gc.assertCurrentThreadHasLockedGC();
}
return;
}
CheckZone<AllowedHelperThread::None>::check();
}
template class CheckArenaListAccess<AllowedHelperThread::GCTask>;
#endif // JS_HAS_PROTECTED_DATA_CHECKS
} // namespace js
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