feat(android): embed local node runtime

2026-04-21 17:22:37 +00:00
parent 8512d32079
commit a929b32b97
690 changed files with 213507 additions and 0 deletions
--- a/mobile/android/app/libnode/include/node/cppgc/member.h
+++ b/mobile/android/app/libnode/include/node/cppgc/member.h
@@ -0,0 +1,291 @@
+// Copyright 2020 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef INCLUDE_CPPGC_MEMBER_H_
+#define INCLUDE_CPPGC_MEMBER_H_
+
+#include <atomic>
+#include <cstddef>
+#include <type_traits>
+
+#include "cppgc/internal/pointer-policies.h"
+#include "cppgc/sentinel-pointer.h"
+#include "cppgc/type-traits.h"
+#include "v8config.h"  // NOLINT(build/include_directory)
+
+namespace cppgc {
+
+class Visitor;
+
+namespace internal {
+
+// MemberBase always refers to the object as const object and defers to
+// BasicMember on casting to the right type as needed.
+class MemberBase {
+ protected:
+  struct AtomicInitializerTag {};
+
+  MemberBase() : raw_(nullptr) {}
+  explicit MemberBase(const void* value) : raw_(value) {}
+  MemberBase(const void* value, AtomicInitializerTag) { SetRawAtomic(value); }
+
+  const void** GetRawSlot() const { return &raw_; }
+  const void* GetRaw() const { return raw_; }
+  void SetRaw(void* value) { raw_ = value; }
+
+  const void* GetRawAtomic() const {
+    return reinterpret_cast<const std::atomic<const void*>*>(&raw_)->load(
+        std::memory_order_relaxed);
+  }
+  void SetRawAtomic(const void* value) {
+    reinterpret_cast<std::atomic<const void*>*>(&raw_)->store(
+        value, std::memory_order_relaxed);
+  }
+
+  void ClearFromGC() const { raw_ = nullptr; }
+
+ private:
+  // All constructors initialize `raw_`. Do not add a default value here as it
+  // results in a non-atomic write on some builds, even when the atomic version
+  // of the constructor is used.
+  mutable const void* raw_;
+};
+
+// The basic class from which all Member classes are 'generated'.
+template <typename T, typename WeaknessTag, typename WriteBarrierPolicy,
+          typename CheckingPolicy>
+class BasicMember final : private MemberBase, private CheckingPolicy {
+ public:
+  using PointeeType = T;
+
+  constexpr BasicMember() = default;
+  constexpr BasicMember(std::nullptr_t) {}     // NOLINT
+  BasicMember(SentinelPointer s) : MemberBase(s) {}  // NOLINT
+  BasicMember(T* raw) : MemberBase(raw) {            // NOLINT
+    InitializingWriteBarrier();
+    this->CheckPointer(Get());
+  }
+  BasicMember(T& raw) : BasicMember(&raw) {}  // NOLINT
+  // Atomic ctor. Using the AtomicInitializerTag forces BasicMember to
+  // initialize using atomic assignments. This is required for preventing
+  // data races with concurrent marking.
+  using AtomicInitializerTag = MemberBase::AtomicInitializerTag;
+  BasicMember(std::nullptr_t, AtomicInitializerTag atomic)
+      : MemberBase(nullptr, atomic) {}
+  BasicMember(SentinelPointer s, AtomicInitializerTag atomic)
+      : MemberBase(s, atomic) {}
+  BasicMember(T* raw, AtomicInitializerTag atomic) : MemberBase(raw, atomic) {
+    InitializingWriteBarrier();
+    this->CheckPointer(Get());
+  }
+  BasicMember(T& raw, AtomicInitializerTag atomic)
+      : BasicMember(&raw, atomic) {}
+  // Copy ctor.
+  BasicMember(const BasicMember& other) : BasicMember(other.Get()) {}
+  // Allow heterogeneous construction.
+  template <typename U, typename OtherBarrierPolicy, typename OtherWeaknessTag,
+            typename OtherCheckingPolicy,
+            typename = std::enable_if_t<std::is_base_of<T, U>::value>>
+  BasicMember(  // NOLINT
+      const BasicMember<U, OtherWeaknessTag, OtherBarrierPolicy,
+                        OtherCheckingPolicy>& other)
+      : BasicMember(other.Get()) {}
+  // Move ctor.
+  BasicMember(BasicMember&& other) noexcept : BasicMember(other.Get()) {
+    other.Clear();
+  }
+  // Allow heterogeneous move construction.
+  template <typename U, typename OtherBarrierPolicy, typename OtherWeaknessTag,
+            typename OtherCheckingPolicy,
+            typename = std::enable_if_t<std::is_base_of<T, U>::value>>
+  BasicMember(BasicMember<U, OtherWeaknessTag, OtherBarrierPolicy,
+                          OtherCheckingPolicy>&& other) noexcept
+      : BasicMember(other.Get()) {
+    other.Clear();
+  }
+  // Construction from Persistent.
+  template <typename U, typename PersistentWeaknessPolicy,
+            typename PersistentLocationPolicy,
+            typename PersistentCheckingPolicy,
+            typename = std::enable_if_t<std::is_base_of<T, U>::value>>
+  BasicMember(const BasicPersistent<U, PersistentWeaknessPolicy,
+                                    PersistentLocationPolicy,
+                                    PersistentCheckingPolicy>& p)
+      : BasicMember(p.Get()) {}
+
+  // Copy assignment.
+  BasicMember& operator=(const BasicMember& other) {
+    return operator=(other.Get());
+  }
+  // Allow heterogeneous copy assignment.
+  template <typename U, typename OtherWeaknessTag, typename OtherBarrierPolicy,
+            typename OtherCheckingPolicy,
+            typename = std::enable_if_t<std::is_base_of<T, U>::value>>
+  BasicMember& operator=(
+      const BasicMember<U, OtherWeaknessTag, OtherBarrierPolicy,
+                        OtherCheckingPolicy>& other) {
+    return operator=(other.Get());
+  }
+  // Move assignment.
+  BasicMember& operator=(BasicMember&& other) noexcept {
+    operator=(other.Get());
+    other.Clear();
+    return *this;
+  }
+  // Heterogeneous move assignment.
+  template <typename U, typename OtherWeaknessTag, typename OtherBarrierPolicy,
+            typename OtherCheckingPolicy,
+            typename = std::enable_if_t<std::is_base_of<T, U>::value>>
+  BasicMember& operator=(BasicMember<U, OtherWeaknessTag, OtherBarrierPolicy,
+                                     OtherCheckingPolicy>&& other) noexcept {
+    operator=(other.Get());
+    other.Clear();
+    return *this;
+  }
+  // Assignment from Persistent.
+  template <typename U, typename PersistentWeaknessPolicy,
+            typename PersistentLocationPolicy,
+            typename PersistentCheckingPolicy,
+            typename = std::enable_if_t<std::is_base_of<T, U>::value>>
+  BasicMember& operator=(
+      const BasicPersistent<U, PersistentWeaknessPolicy,
+                            PersistentLocationPolicy, PersistentCheckingPolicy>&
+          other) {
+    return operator=(other.Get());
+  }
+  BasicMember& operator=(T* other) {
+    SetRawAtomic(other);
+    AssigningWriteBarrier();
+    this->CheckPointer(Get());
+    return *this;
+  }
+  BasicMember& operator=(std::nullptr_t) {
+    Clear();
+    return *this;
+  }
+  BasicMember& operator=(SentinelPointer s) {
+    SetRawAtomic(s);
+    return *this;
+  }
+
+  template <typename OtherWeaknessTag, typename OtherBarrierPolicy,
+            typename OtherCheckingPolicy>
+  void Swap(BasicMember<T, OtherWeaknessTag, OtherBarrierPolicy,
+                        OtherCheckingPolicy>& other) {
+    T* tmp = Get();
+    *this = other;
+    other = tmp;
+  }
+
+  explicit operator bool() const { return Get(); }
+  operator T*() const { return Get(); }
+  T* operator->() const { return Get(); }
+  T& operator*() const { return *Get(); }
+
+  // CFI cast exemption to allow passing SentinelPointer through T* and support
+  // heterogeneous assignments between different Member and Persistent handles
+  // based on their actual types.
+  V8_CLANG_NO_SANITIZE("cfi-unrelated-cast") T* Get() const {
+    // Executed by the mutator, hence non atomic load.
+    //
+    // The const_cast below removes the constness from MemberBase storage. The
+    // following static_cast re-adds any constness if specified through the
+    // user-visible template parameter T.
+    return static_cast<T*>(const_cast<void*>(MemberBase::GetRaw()));
+  }
+
+  void Clear() { SetRawAtomic(nullptr); }
+
+  T* Release() {
+    T* result = Get();
+    Clear();
+    return result;
+  }
+
+  const T** GetSlotForTesting() const {
+    return reinterpret_cast<const T**>(GetRawSlot());
+  }
+
+ private:
+  const T* GetRawAtomic() const {
+    return static_cast<const T*>(MemberBase::GetRawAtomic());
+  }
+
+  void InitializingWriteBarrier() const {
+    WriteBarrierPolicy::InitializingBarrier(GetRawSlot(), GetRaw());
+  }
+  void AssigningWriteBarrier() const {
+    WriteBarrierPolicy::AssigningBarrier(GetRawSlot(), GetRaw());
+  }
+
+  void ClearFromGC() const { MemberBase::ClearFromGC(); }
+
+  T* GetFromGC() const { return Get(); }
+
+  friend class cppgc::Visitor;
+  template <typename U>
+  friend struct cppgc::TraceTrait;
+};
+
+template <typename T1, typename WeaknessTag1, typename WriteBarrierPolicy1,
+          typename CheckingPolicy1, typename T2, typename WeaknessTag2,
+          typename WriteBarrierPolicy2, typename CheckingPolicy2>
+bool operator==(const BasicMember<T1, WeaknessTag1, WriteBarrierPolicy1,
+                                  CheckingPolicy1>& member1,
+                const BasicMember<T2, WeaknessTag2, WriteBarrierPolicy2,
+                                  CheckingPolicy2>& member2) {
+  return member1.Get() == member2.Get();
+}
+
+template <typename T1, typename WeaknessTag1, typename WriteBarrierPolicy1,
+          typename CheckingPolicy1, typename T2, typename WeaknessTag2,
+          typename WriteBarrierPolicy2, typename CheckingPolicy2>
+bool operator!=(const BasicMember<T1, WeaknessTag1, WriteBarrierPolicy1,
+                                  CheckingPolicy1>& member1,
+                const BasicMember<T2, WeaknessTag2, WriteBarrierPolicy2,
+                                  CheckingPolicy2>& member2) {
+  return !(member1 == member2);
+}
+
+template <typename T, typename WriteBarrierPolicy, typename CheckingPolicy>
+struct IsWeak<
+    internal::BasicMember<T, WeakMemberTag, WriteBarrierPolicy, CheckingPolicy>>
+    : std::true_type {};
+
+}  // namespace internal
+
+/**
+ * Members are used in classes to contain strong pointers to other garbage
+ * collected objects. All Member fields of a class must be traced in the class'
+ * trace method.
+ */
+template <typename T>
+using Member = internal::BasicMember<T, internal::StrongMemberTag,
+                                     internal::DijkstraWriteBarrierPolicy>;
+
+/**
+ * WeakMember is similar to Member in that it is used to point to other garbage
+ * collected objects. However instead of creating a strong pointer to the
+ * object, the WeakMember creates a weak pointer, which does not keep the
+ * pointee alive. Hence if all pointers to to a heap allocated object are weak
+ * the object will be garbage collected. At the time of GC the weak pointers
+ * will automatically be set to null.
+ */
+template <typename T>
+using WeakMember = internal::BasicMember<T, internal::WeakMemberTag,
+                                         internal::DijkstraWriteBarrierPolicy>;
+
+/**
+ * UntracedMember is a pointer to an on-heap object that is not traced for some
+ * reason. Do not use this unless you know what you are doing. Keeping raw
+ * pointers to on-heap objects is prohibited unless used from stack. Pointee
+ * must be kept alive through other means.
+ */
+template <typename T>
+using UntracedMember = internal::BasicMember<T, internal::UntracedMemberTag,
+                                             internal::NoWriteBarrierPolicy>;
+
+}  // namespace cppgc
+
+#endif  // INCLUDE_CPPGC_MEMBER_H_