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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:22:09 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 09:22:09 +0000
commit43a97878ce14b72f0981164f87f2e35e14151312 (patch)
tree620249daf56c0258faa40cbdcf9cfba06de2a846 /js/src/vm/Shape-inl.h
parentInitial commit. (diff)
downloadfirefox-43a97878ce14b72f0981164f87f2e35e14151312.tar.xz
firefox-43a97878ce14b72f0981164f87f2e35e14151312.zip
Adding upstream version 110.0.1.upstream/110.0.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'js/src/vm/Shape-inl.h')
-rw-r--r--js/src/vm/Shape-inl.h105
1 files changed, 105 insertions, 0 deletions
diff --git a/js/src/vm/Shape-inl.h b/js/src/vm/Shape-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_Shape_inl_h
+#define vm_Shape_inl_h
+
+#include "vm/Shape.h"
+
+#include "vm/JSObject.h"
+#include "vm/PropertyResult.h"
+
+#include "gc/GCContext-inl.h"
+#include "gc/Marking-inl.h"
+#include "vm/PropMap-inl.h"
+
+namespace js {
+
+template <class ObjectSubclass>
+/* static */ inline bool SharedShape::ensureInitialCustomShape(
+ JSContext* cx, Handle<ObjectSubclass*> obj) {
+ static_assert(std::is_base_of_v<JSObject, ObjectSubclass>,
+ "ObjectSubclass must be a subclass of JSObject");
+
+ // If the provided object has a non-empty shape, it was given the cached
+ // initial shape when created: nothing to do.
+ if (!obj->empty()) {
+ return true;
+ }
+
+ // Ensure the initial shape isn't collected under assignInitialShape, to
+ // simplify insertInitialShape.
+ Rooted<Shape*> emptyShape(cx, obj->shape());
+
+ // If no initial shape was assigned, do so.
+ Rooted<SharedShape*> shape(cx, ObjectSubclass::assignInitialShape(cx, obj));
+ if (!shape) {
+ return false;
+ }
+ MOZ_ASSERT(!obj->empty());
+
+ // Cache the initial shape, so that future instances will begin life with that
+ // shape.
+ SharedShape::insertInitialShape(cx, shape);
+ return true;
+}
+
+MOZ_ALWAYS_INLINE PropMap* NativeShape::lookup(JSContext* cx, PropertyKey key,
+ uint32_t* index) {
+ uint32_t len = propMapLength();
+ return len > 0 ? propMap_->lookup(cx, len, key, index) : nullptr;
+}
+
+MOZ_ALWAYS_INLINE PropMap* NativeShape::lookupPure(PropertyKey key,
+ uint32_t* index) {
+ uint32_t len = propMapLength();
+ return len > 0 ? propMap_->lookupPure(len, key, index) : nullptr;
+}
+
+inline void Shape::purgeCache(JS::GCContext* gcx) {
+ if (cache_.isShapeSetForAdd()) {
+ gcx->delete_(this, cache_.toShapeSetForAdd(), MemoryUse::ShapeSetForAdd);
+ }
+ cache_.setNone();
+}
+
+inline void Shape::finalize(JS::GCContext* gcx) {
+ if (!cache_.isNone()) {
+ purgeCache(gcx);
+ }
+ if (isWasmGC()) {
+ asWasmGC().finalize(gcx);
+ }
+}
+
+inline void WasmGCShape::init() { recGroup_->AddRef(); }
+
+inline void WasmGCShape::finalize(JS::GCContext* gcx) { recGroup_->Release(); }
+
+inline SharedPropMap* SharedShape::propMapMaybeForwarded() const {
+ MOZ_ASSERT(isShared());
+ PropMap* propMap = propMap_;
+ return propMap ? MaybeForwarded(propMap)->asShared() : nullptr;
+}
+
+static inline JS::PropertyAttributes GetPropertyAttributes(
+ JSObject* obj, PropertyResult prop) {
+ MOZ_ASSERT(obj->is<NativeObject>());
+
+ if (prop.isDenseElement()) {
+ return obj->as<NativeObject>().getElementsHeader()->elementAttributes();
+ }
+ if (prop.isTypedArrayElement()) {
+ return {JS::PropertyAttribute::Configurable,
+ JS::PropertyAttribute::Enumerable, JS::PropertyAttribute::Writable};
+ }
+
+ return prop.propertyInfo().propAttributes();
+}
+
+} /* namespace js */
+
+#endif /* vm_Shape_inl_h */