1 files changed, 87 insertions, 0 deletions
diff --git a/js/src/vm/ArrayObject-inl.h b/js/src/vm/ArrayObject-inl.h
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+++ b/js/src/vm/ArrayObject-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_ArrayObject_inl_h
+#define vm_ArrayObject_inl_h
+
+#include "vm/ArrayObject.h"
+
+#include "gc/GCProbes.h"
+
+#include "vm/JSContext-inl.h"
+#include "vm/JSObject-inl.h"
+#include "vm/NativeObject-inl.h"
+
+namespace js {
+
+/* static */ MOZ_ALWAYS_INLINE ArrayObject* ArrayObject::create(
+    JSContext* cx, gc::AllocKind kind, gc::Heap heap,
+    Handle<SharedShape*> shape, uint32_t length, uint32_t slotSpan,
+    AutoSetNewObjectMetadata& metadata, gc::AllocSite* site) {
+  debugCheckNewObject(shape, kind, heap);
+
+  const JSClass* clasp = &ArrayObject::class_;
+  MOZ_ASSERT(shape);
+  MOZ_ASSERT(shape->getObjectClass() == clasp);
+  MOZ_ASSERT(clasp->isNativeObject());
+  MOZ_ASSERT(!clasp->hasFinalize());
+
+  // Note: the slot span is passed as argument to allow more constant folding
+  // below for the common case of slotSpan == 0.
+  MOZ_ASSERT(shape->slotSpan() == slotSpan);
+
+  // Arrays can use their fixed slots to store elements, so can't have shapes
+  // which allow named properties to be stored in the fixed slots.
+  MOZ_ASSERT(shape->numFixedSlots() == 0);
+
+  size_t nDynamicSlots = calculateDynamicSlots(0, slotSpan, clasp);
+  ArrayObject* aobj = cx->newCell<ArrayObject>(kind, heap, clasp, site);
+  if (!aobj) {
+    return nullptr;
+  }
+
+  aobj->initShape(shape);
+  aobj->initFixedElements(kind, length);
+
+  if (!nDynamicSlots) {
+    aobj->initEmptyDynamicSlots();
+  } else if (!aobj->allocateInitialSlots(cx, nDynamicSlots)) {
+    return nullptr;
+  }
+
+  MOZ_ASSERT(clasp->shouldDelayMetadataBuilder());
+  cx->realm()->setObjectPendingMetadata(aobj);
+
+  if (slotSpan > 0) {
+    aobj->initDynamicSlots(slotSpan);
+  }
+
+  gc::gcprobes::CreateObject(aobj);
+  return aobj;
+}
+
+inline DenseElementResult ArrayObject::addDenseElementNoLengthChange(
+    JSContext* cx, uint32_t index, const Value& val) {
+  MOZ_ASSERT(isExtensible());
+
+  // Only support the `index < length` case so that we don't have to increase
+  // the array's .length value below.
+  if (index >= length() || containsDenseElement(index) || isIndexed()) {
+    return DenseElementResult::Incomplete;
+  }
+
+  DenseElementResult res = ensureDenseElements(cx, index, 1);
+  if (MOZ_UNLIKELY(res != DenseElementResult::Success)) {
+    return res;
+  }
+
+  initDenseElement(index, val);
+  return DenseElementResult::Success;
+}
+
+}  // namespace js
+
+#endif  // vm_ArrayObject_inl_h