Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 116 insertions, 0 deletions

diff --git a/js/src/vm/Realm-inl.h b/js/src/vm/Realm-inl.h
new file mode 100644
index 0000000000..87386e4a9b
--- /dev/null
+++ b/js/src/vm/Realm-inl.h
@@ -0,0 +1,116 @@
+/* -*- 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::LexicalEnvironmentObject& 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::LexicalEnvironmentObject* 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 */