1 files changed, 110 insertions, 0 deletions
diff --git a/js/src/vm/Realm-inl.h b/js/src/vm/Realm-inl.h
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+++ b/js/src/vm/Realm-inl.h
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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/GlobalObject.h"
+
+#include "vm/JSContext-inl.h"
+
+inline void JS::Realm::initGlobal(js::GlobalObject& global) {
+  MOZ_ASSERT(global.realm() == this);
+  MOZ_ASSERT(!global_);
+  global_.set(&global);
+}
+
+js::GlobalObject* JS::Realm::maybeGlobal() const {
+  MOZ_ASSERT_IF(global_, global_->realm() == this);
+  return global_;
+}
+
+inline bool JS::Realm::hasLiveGlobal() const {
+  // The global is swept by traceWeakGlobalEdge when we start sweeping a zone
+  // group. This frees the GlobalObjectData, so the realm must live at least as
+  // long as the global.
+  MOZ_ASSERT_IF(global_, !js::gc::IsAboutToBeFinalized(global_));
+  return bool(global_);
+}
+
+inline bool JS::Realm::hasInitializedGlobal() const {
+  return hasLiveGlobal() && !initializingGlobal_;
+}
+
+inline bool JS::Realm::marked() const {
+  // The Realm survives in the following cases:
+  //  - its global is live
+  //  - it has been entered (to ensure we don't destroy the Realm while we're
+  //    allocating its global)
+  //  - it was allocated after the start of an incremental GC (as there may be
+  //    pointers to it from other GC things)
+  return hasLiveGlobal() || hasBeenEnteredIgnoringJit() ||
+         allocatedDuringIncrementalGC_;
+}
+
+/* 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::AutoFunctionOrCurrentRealm::AutoFunctionOrCurrentRealm(JSContext* cx,
+                                                           HandleObject fun) {
+  JS::Realm* realm = JS::GetFunctionRealm(cx, fun);
+  if (!realm) {
+    cx->clearPendingException();
+    return;
+  }
+
+  // Enter the function's realm.
+  ar_.emplace(cx, realm);
+}
+
+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) {}
+
+#endif /* vm_Realm_inl_h */