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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/. */
#ifndef vm_Realm_inl_h
#define vm_Realm_inl_h
#include "vm/Realm.h"
#include "gc/Barrier.h"
#include "gc/Marking.h"
#include "vm/EnvironmentObject.h"
#include "vm/GlobalObject.h"
#include "vm/Iteration.h"
#include "vm/JSContext-inl.h"
inline void JS::Realm::initGlobal(
js::GlobalObject& global, js::GlobalLexicalEnvironmentObject& lexicalEnv) {
MOZ_ASSERT(global.realm() == this);
MOZ_ASSERT(!global_);
global_.set(&global);
lexicalEnv_.set(&lexicalEnv);
}
js::GlobalObject* JS::Realm::maybeGlobal() const {
MOZ_ASSERT_IF(global_, global_->realm() == this);
return global_;
}
js::GlobalLexicalEnvironmentObject* JS::Realm::unbarrieredLexicalEnvironment()
const {
return lexicalEnv_.unbarrieredGet();
}
inline bool JS::Realm::globalIsAboutToBeFinalized() {
MOZ_ASSERT(zone_->isGCSweeping());
return global_ && js::gc::IsAboutToBeFinalized(&global_);
}
inline bool JS::Realm::hasLiveGlobal() const {
js::GlobalObject* global = unsafeUnbarrieredMaybeGlobal();
return global && !js::gc::IsAboutToBeFinalizedUnbarriered(&global);
}
inline bool JS::Realm::marked() const {
// Preserve this Realm if it has a live global or if it has been entered (to
// ensure we don't destroy the Realm while we're allocating its global).
return hasLiveGlobal() || hasBeenEnteredIgnoringJit();
}
/* static */ inline js::ObjectRealm& js::ObjectRealm::get(const JSObject* obj) {
// Note: obj might be a CCW if we're accessing ObjectRealm::enumerators.
// CCWs here are fine because we always return the same ObjectRealm for a
// particular (CCW) object.
return obj->maybeCCWRealm()->objects_;
}
template <typename T>
js::AutoRealm::AutoRealm(JSContext* cx, const T& target)
: cx_(cx), origin_(cx->realm()) {
cx_->enterRealmOf(target);
}
// Protected constructor that bypasses assertions in enterRealmOf.
js::AutoRealm::AutoRealm(JSContext* cx, JS::Realm* target)
: cx_(cx), origin_(cx->realm()) {
cx_->enterRealm(target);
}
js::AutoRealm::~AutoRealm() { cx_->leaveRealm(origin_); }
js::AutoAllocInAtomsZone::AutoAllocInAtomsZone(JSContext* cx)
: cx_(cx), origin_(cx->realm()) {
cx_->enterAtomsZone();
}
js::AutoAllocInAtomsZone::~AutoAllocInAtomsZone() {
cx_->leaveAtomsZone(origin_);
}
js::AutoMaybeLeaveAtomsZone::AutoMaybeLeaveAtomsZone(JSContext* cx)
: cx_(cx), wasInAtomsZone_(cx->zone() && cx->zone()->isAtomsZone()) {
if (wasInAtomsZone_) {
cx_->leaveAtomsZone(nullptr);
}
}
js::AutoMaybeLeaveAtomsZone::~AutoMaybeLeaveAtomsZone() {
if (wasInAtomsZone_) {
cx_->enterAtomsZone();
}
}
js::AutoRealmUnchecked::AutoRealmUnchecked(JSContext* cx, JS::Realm* target)
: AutoRealm(cx, target) {}
MOZ_ALWAYS_INLINE bool js::ObjectRealm::objectMaybeInIteration(JSObject* obj) {
MOZ_ASSERT(&ObjectRealm::get(obj) == this);
// If the list is empty we're not iterating any objects.
js::NativeIterator* next = enumerators->next();
if (enumerators == next) {
return false;
}
// If the list contains a single object, check if it's |obj|.
if (next->next() == enumerators) {
return next->objectBeingIterated() == obj;
}
return true;
}
#endif /* vm_Realm_inl_h */