Gecko [ c.stage.kornherr.net ]

Name	Size	Permission	Date
crypto	[ DIR ]	drwxr-xr-x	2024-07-10 10:55
permission	[ DIR ]	drwxr-xr-x	2024-07-10 10:55
tracing	[ DIR ]	drwxr-xr-x	2024-07-10 10:55
acorn_version.h	209 B	-rw-r--r--	2024-04-18 19:08
aliased_buffer-inl.h	7.44 KB	-rw-r--r--	2024-02-13 21:40
aliased_buffer.h	6.05 KB	-rw-r--r--	2024-02-13 21:40
aliased_struct-inl.h	1.32 KB	-rw-r--r--	2024-02-13 21:40
aliased_struct.h	1.44 KB	-rw-r--r--	2024-02-13 21:40
async_wrap-inl.h	2.68 KB	-rw-r--r--	2024-02-13 21:40
async_wrap.h	11.32 KB	-rw-r--r--	2024-02-13 21:40
base64-inl.h	5.76 KB	-rw-r--r--	2024-02-13 21:40
base64.h	1.43 KB	-rw-r--r--	2024-02-13 21:40
base64_version.h	227 B	-rw-r--r--	2024-02-13 21:40
base_object-inl.h	8.94 KB	-rw-r--r--	2024-02-13 21:40
base_object.h	13.3 KB	-rw-r--r--	2024-02-13 21:40
base_object_types.h	3.28 KB	-rw-r--r--	2024-02-13 21:40
blob_serializer_deserializer-inl.h	10.54 KB	-rw-r--r--	2024-02-13 21:40
blob_serializer_deserializer.h	3.56 KB	-rw-r--r--	2024-02-13 21:40
callback_queue-inl.h	2.59 KB	-rw-r--r--	2024-02-13 21:40
callback_queue.h	1.96 KB	-rw-r--r--	2024-02-13 21:40
cares_wrap.h	14.37 KB	-rw-r--r--	2024-04-18 19:08
cjs_module_lexer_version.h	277 B	-rw-r--r--	2024-04-18 19:08
cleanup_queue-inl.h	1.58 KB	-rw-r--r--	2024-02-13 21:40
cleanup_queue.h	2.19 KB	-rw-r--r--	2024-02-13 21:40
connect_wrap.h	584 B	-rw-r--r--	2024-02-13 21:40
connection_wrap.h	686 B	-rw-r--r--	2024-02-13 21:40
debug_utils-inl.h	7.42 KB	-rw-r--r--	2024-02-13 21:40
debug_utils.h	6.77 KB	-rw-r--r--	2024-02-13 21:40
diagnosticfilename-inl.h	768 B	-rw-r--r--	2024-02-13 21:40
env-inl.h	25.59 KB	-rw-r--r--	2024-02-13 21:40
env.h	38.85 KB	-rw-r--r--	2024-02-13 21:40
env_properties.h	33.32 KB	-rw-r--r--	2024-02-13 21:40
handle_wrap.h	4.16 KB	-rw-r--r--	2024-02-13 21:40
histogram-inl.h	2.39 KB	-rw-r--r--	2024-02-13 21:40
histogram.h	7.89 KB	-rw-r--r--	2024-02-13 21:40
inspector_agent.h	4.69 KB	-rw-r--r--	2024-02-13 21:40
inspector_io.h	2.19 KB	-rw-r--r--	2024-02-13 21:40
inspector_profiler.h	4.53 KB	-rw-r--r--	2024-02-13 21:40
inspector_socket.h	1.53 KB	-rw-r--r--	2024-02-13 21:40
inspector_socket_server.h	3.5 KB	-rw-r--r--	2024-02-13 21:40
js_native_api.h	31.22 KB	-rw-r--r--	2024-02-13 21:40
js_native_api_types.h	4.44 KB	-rw-r--r--	2024-02-13 21:40
js_native_api_v8.h	16.83 KB	-rw-r--r--	2024-02-13 21:40
js_native_api_v8_internals.h	1.56 KB	-rw-r--r--	2024-02-13 21:40
js_stream.h	1.35 KB	-rw-r--r--	2024-02-13 21:40
json_utils.h	3.8 KB	-rw-r--r--	2024-02-13 21:40
memory_tracker-inl.h	12.01 KB	-rw-r--r--	2024-02-13 21:40
memory_tracker.h	11.55 KB	-rw-r--r--	2024-02-13 21:40
module_wrap.h	3.72 KB	-rw-r--r--	2024-02-13 21:40
node.h	56.44 KB	-rw-r--r--	2024-02-13 21:40
node_api.h	9.96 KB	-rw-r--r--	2024-02-13 21:40
node_api_internals.h	1.24 KB	-rw-r--r--	2024-02-13 21:40
node_api_types.h	1.57 KB	-rw-r--r--	2024-02-13 21:40
node_binding.h	4.19 KB	-rw-r--r--	2024-02-13 21:40
node_blob.h	5.04 KB	-rw-r--r--	2024-02-13 21:40
node_bob-inl.h	657 B	-rw-r--r--	2024-02-13 21:40
node_bob.h	2.82 KB	-rw-r--r--	2024-02-13 21:40
node_buffer.h	3.6 KB	-rw-r--r--	2024-02-13 21:40
node_builtins.h	5.63 KB	-rw-r--r--	2024-02-13 21:40
node_constants.h	3.67 KB	-rw-r--r--	2024-02-13 21:40
node_context_data.h	2.94 KB	-rw-r--r--	2024-02-13 21:40
node_contextify.h	7.63 KB	-rw-r--r--	2024-02-13 21:40
node_crypto.h	2.27 KB	-rw-r--r--	2024-02-13 21:40
node_dir.h	1.31 KB	-rw-r--r--	2024-02-13 21:40
node_dtrace.h	2.89 KB	-rw-r--r--	2024-02-13 21:40
node_errors.h	16.86 KB	-rw-r--r--	2024-02-13 21:40
node_external_reference.h	7.86 KB	-rw-r--r--	2024-02-13 21:40
node_file-inl.h	12.45 KB	-rw-r--r--	2024-02-13 21:40
node_file.h	14.7 KB	-rw-r--r--	2024-02-13 21:40
node_http2.h	38.61 KB	-rw-r--r--	2024-02-13 21:40
node_http2_state.h	4.76 KB	-rw-r--r--	2024-02-13 21:40
node_http_common-inl.h	5.46 KB	-rw-r--r--	2024-02-13 21:40
node_http_common.h	24.56 KB	-rw-r--r--	2024-02-13 21:40
node_i18n.h	4.34 KB	-rw-r--r--	2024-02-13 21:40
node_internals.h	15.03 KB	-rw-r--r--	2024-02-13 21:40
node_main_instance.h	2.96 KB	-rw-r--r--	2024-02-13 21:40
node_mem-inl.h	3.6 KB	-rw-r--r--	2024-02-13 21:40
node_mem.h	1.27 KB	-rw-r--r--	2024-02-13 21:40
node_messaging.h	14.3 KB	-rw-r--r--	2024-02-13 21:40
node_metadata.h	4.37 KB	-rw-r--r--	2024-02-13 21:40
node_mutex.h	7.78 KB	-rw-r--r--	2024-02-13 21:40
node_object_wrap.h	3.78 KB	-rw-r--r--	2024-02-13 21:40
node_options-inl.h	15.86 KB	-rw-r--r--	2024-02-13 21:40
node_options.h	17.57 KB	-rw-r--r--	2024-02-13 21:40
node_perf.h	4.76 KB	-rw-r--r--	2024-02-13 21:40
node_perf_common.h	2.88 KB	-rw-r--r--	2024-02-13 21:40
node_platform.h	6.19 KB	-rw-r--r--	2024-02-13 21:40
node_process-inl.h	737 B	-rw-r--r--	2024-02-13 21:40
node_process.h	3.36 KB	-rw-r--r--	2024-02-13 21:40
node_realm-inl.h	4.59 KB	-rw-r--r--	2024-02-13 21:40
node_realm.h	5.38 KB	-rw-r--r--	2024-02-13 21:40
node_report.h	994 B	-rw-r--r--	2024-02-13 21:40
node_revert.h	2.09 KB	-rw-r--r--	2024-02-13 21:40
node_root_certs.h	231.49 KB	-rw-r--r--	2024-02-13 21:40
node_sea.h	517 B	-rw-r--r--	2024-02-13 21:40
node_shadow_realm.h	449 B	-rw-r--r--	2024-02-13 21:40
node_snapshot_builder.h	1.21 KB	-rw-r--r--	2024-02-13 21:40
node_snapshotable.h	4.82 KB	-rw-r--r--	2024-02-13 21:40
node_sockaddr-inl.h	7.28 KB	-rw-r--r--	2024-02-13 21:40
node_sockaddr.h	12.91 KB	-rw-r--r--	2024-02-13 21:40
node_stat_watcher.h	2.36 KB	-rw-r--r--	2024-02-13 21:40
node_threadsafe_cow-inl.h	1.28 KB	-rw-r--r--	2024-02-13 21:40
node_threadsafe_cow.h	2.78 KB	-rw-r--r--	2024-02-13 21:40
node_union_bytes.h	1.66 KB	-rw-r--r--	2024-02-13 21:40
node_url.h	2.13 KB	-rw-r--r--	2024-02-13 21:40
node_util.h	1.39 KB	-rw-r--r--	2024-02-13 21:40
node_v8.h	1.67 KB	-rw-r--r--	2024-02-13 21:40
node_v8_platform-inl.h	6.63 KB	-rw-r--r--	2024-02-13 21:40
node_version.h	3.85 KB	-rw-r--r--	2024-04-18 19:08
node_wasi.h	5.21 KB	-rw-r--r--	2024-02-13 21:40
node_wasm_web_api.h	1.78 KB	-rw-r--r--	2024-02-13 21:40
node_watchdog.h	4.32 KB	-rw-r--r--	2024-02-13 21:40
node_win32_etw_provider-inl.h	11.53 KB	-rw-r--r--	2024-02-13 21:40
node_win32_etw_provider.h	3.67 KB	-rw-r--r--	2024-02-13 21:40
node_worker.h	4.92 KB	-rw-r--r--	2024-02-13 21:40
pipe_wrap.h	2.78 KB	-rw-r--r--	2024-02-13 21:40
req_wrap-inl.h	5.43 KB	-rw-r--r--	2024-02-13 21:40
req_wrap.h	2.23 KB	-rw-r--r--	2024-02-13 21:40
spawn_sync.h	6.87 KB	-rw-r--r--	2024-02-13 21:40
stream_base-inl.h	4.93 KB	-rw-r--r--	2024-02-13 21:40
stream_base.h	17.44 KB	-rw-r--r--	2024-02-13 21:40
stream_pipe.h	2.39 KB	-rw-r--r--	2024-02-13 21:40
stream_wrap.h	4.15 KB	-rw-r--r--	2024-02-13 21:40
string_bytes.h	4.69 KB	-rw-r--r--	2024-02-13 21:40
string_decoder-inl.h	858 B	-rw-r--r--	2024-02-13 21:40
string_decoder.h	1.5 KB	-rw-r--r--	2024-02-13 21:40
string_search.h	20.94 KB	-rw-r--r--	2024-02-13 21:40
tcp_wrap.h	3.9 KB	-rw-r--r--	2024-02-13 21:40
threadpoolwork-inl.h	2.58 KB	-rw-r--r--	2024-02-13 21:40
timer_wrap-inl.h	755 B	-rw-r--r--	2024-02-13 21:40
timer_wrap.h	1.79 KB	-rw-r--r--	2024-02-13 21:40
tty_wrap.h	2.27 KB	-rw-r--r--	2024-02-13 21:40
udp_wrap.h	8.5 KB	-rw-r--r--	2024-02-13 21:40
undici_version.h	215 B	-rw-r--r--	2024-04-18 19:08
util-inl.h	19.56 KB	-rw-r--r--	2024-02-13 21:40
util.h	31.46 KB	-rw-r--r--	2024-02-13 21:40
v8abbr.h	5.05 KB	-rw-r--r--	2024-02-13 21:40

Rename

// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

#ifndef SRC_ENV_H_
#define SRC_ENV_H_

#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS

#include "aliased_buffer.h"
#if HAVE_INSPECTOR
#include "inspector_agent.h"
#include "inspector_profiler.h"
#endif
#include "callback_queue.h"
#include "cleanup_queue-inl.h"
#include "debug_utils.h"
#include "env_properties.h"
#include "handle_wrap.h"
#include "node.h"
#include "node_binding.h"
#include "node_builtins.h"
#include "node_main_instance.h"
#include "node_options.h"
#include "node_perf_common.h"
#include "node_realm.h"
#include "node_snapshotable.h"
#include "req_wrap.h"
#include "util.h"
#include "uv.h"
#include "v8.h"

#include <array>
#include <atomic>
#include <cstdint>
#include <functional>
#include <list>
#include <memory>
#include <ostream>
#include <set>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <vector>

namespace node {

namespace contextify {
class ContextifyScript;
class CompiledFnEntry;
}

namespace performance {
class PerformanceState;
}

namespace tracing {
class AgentWriterHandle;
}

#if HAVE_INSPECTOR
namespace profiler {
class V8CoverageConnection;
class V8CpuProfilerConnection;
class V8HeapProfilerConnection;
}  // namespace profiler

namespace inspector {
class ParentInspectorHandle;
}
#endif  // HAVE_INSPECTOR

namespace worker {
class Worker;
}

namespace loader {
class ModuleWrap;
}  // namespace loader

class Environment;
class Realm;

// Disables zero-filling for ArrayBuffer allocations in this scope. This is
// similar to how we implement Buffer.allocUnsafe() in JS land.
class NoArrayBufferZeroFillScope {
 public:
  inline explicit NoArrayBufferZeroFillScope(IsolateData* isolate_data);
  inline ~NoArrayBufferZeroFillScope();

private:
  NodeArrayBufferAllocator* node_allocator_;

friend class Environment;
};

struct IsolateDataSerializeInfo {
  std::vector<SnapshotIndex> primitive_values;
  std::vector<PropInfo> template_values;

friend std::ostream& operator<<(std::ostream& o,
                                  const IsolateDataSerializeInfo& i);
};

class NODE_EXTERN_PRIVATE IsolateData : public MemoryRetainer {
 public:
  IsolateData(v8::Isolate* isolate,
              uv_loop_t* event_loop,
              MultiIsolatePlatform* platform = nullptr,
              ArrayBufferAllocator* node_allocator = nullptr,
              const IsolateDataSerializeInfo* isolate_data_info = nullptr);
  SET_MEMORY_INFO_NAME(IsolateData)
  SET_SELF_SIZE(IsolateData)
  void MemoryInfo(MemoryTracker* tracker) const override;
  IsolateDataSerializeInfo Serialize(v8::SnapshotCreator* creator);

inline uv_loop_t* event_loop() const;
  inline MultiIsolatePlatform* platform() const;
  inline std::shared_ptr<PerIsolateOptions> options();
  inline void set_options(std::shared_ptr<PerIsolateOptions> options);

inline NodeArrayBufferAllocator* node_allocator() const;

inline worker::Worker* worker_context() const;
  inline void set_worker_context(worker::Worker* context);

#define VP(PropertyName, StringValue) V(v8::Private, PropertyName)
#define VY(PropertyName, StringValue) V(v8::Symbol, PropertyName)
#define VS(PropertyName, StringValue) V(v8::String, PropertyName)
#define V(TypeName, PropertyName)                                             \
  inline v8::Local<TypeName> PropertyName() const;
  PER_ISOLATE_PRIVATE_SYMBOL_PROPERTIES(VP)
  PER_ISOLATE_SYMBOL_PROPERTIES(VY)
  PER_ISOLATE_STRING_PROPERTIES(VS)
#undef V
#undef VY
#undef VS
#undef VP

#define VM(PropertyName) V(PropertyName##_binding, v8::FunctionTemplate)
#define V(PropertyName, TypeName)                                              \
  inline v8::Local<TypeName> PropertyName() const;                             \
  inline void set_##PropertyName(v8::Local<TypeName> value);
  PER_ISOLATE_TEMPLATE_PROPERTIES(V)
  NODE_BINDINGS_WITH_PER_ISOLATE_INIT(VM)
#undef V
#undef VM

inline v8::Local<v8::String> async_wrap_provider(int index) const;

size_t max_young_gen_size = 1;
  std::unordered_map<const char*, v8::Eternal<v8::String>> static_str_map;

inline v8::Isolate* isolate() const;
  IsolateData(const IsolateData&) = delete;
  IsolateData& operator=(const IsolateData&) = delete;
  IsolateData(IsolateData&&) = delete;
  IsolateData& operator=(IsolateData&&) = delete;

private:
  void DeserializeProperties(const IsolateDataSerializeInfo* isolate_data_info);
  void CreateProperties();

#define VP(PropertyName, StringValue) V(v8::Private, PropertyName)
#define VY(PropertyName, StringValue) V(v8::Symbol, PropertyName)
#define VS(PropertyName, StringValue) V(v8::String, PropertyName)
#define VM(PropertyName) V(v8::FunctionTemplate, PropertyName##_binding)
#define VT(PropertyName, TypeName) V(TypeName, PropertyName)
#define V(TypeName, PropertyName)                                             \
  v8::Eternal<TypeName> PropertyName ## _;
  PER_ISOLATE_PRIVATE_SYMBOL_PROPERTIES(VP)
  PER_ISOLATE_SYMBOL_PROPERTIES(VY)
  PER_ISOLATE_STRING_PROPERTIES(VS)
  PER_ISOLATE_TEMPLATE_PROPERTIES(VT)
  NODE_BINDINGS_WITH_PER_ISOLATE_INIT(VM)
#undef V
#undef VM
#undef VT
#undef VS
#undef VY
#undef VP
  // Keep a list of all Persistent strings used for AsyncWrap Provider types.
  std::array<v8::Eternal<v8::String>, AsyncWrap::PROVIDERS_LENGTH>
      async_wrap_providers_;

v8::Isolate* const isolate_;
  uv_loop_t* const event_loop_;
  NodeArrayBufferAllocator* const node_allocator_;
  MultiIsolatePlatform* platform_;
  std::shared_ptr<PerIsolateOptions> options_;
  worker::Worker* worker_context_ = nullptr;
};

struct ContextInfo {
  explicit ContextInfo(const std::string& name) : name(name) {}
  const std::string name;
  std::string origin;
  bool is_default = false;
};

class EnabledDebugList;

namespace per_process {
extern std::shared_ptr<KVStore> system_environment;
}

struct EnvSerializeInfo;

class AsyncHooks : public MemoryRetainer {
 public:
  SET_MEMORY_INFO_NAME(AsyncHooks)
  SET_SELF_SIZE(AsyncHooks)
  void MemoryInfo(MemoryTracker* tracker) const override;

// Reason for both UidFields and Fields are that one is stored as a double*
  // and the other as a uint32_t*.
  enum Fields {
    kInit,
    kBefore,
    kAfter,
    kDestroy,
    kPromiseResolve,
    kTotals,
    kCheck,
    kStackLength,
    kUsesExecutionAsyncResource,
    kFieldsCount,
  };

enum UidFields {
    kExecutionAsyncId,
    kTriggerAsyncId,
    kAsyncIdCounter,
    kDefaultTriggerAsyncId,
    kUidFieldsCount,
  };

inline AliasedUint32Array& fields();
  inline AliasedFloat64Array& async_id_fields();
  inline AliasedFloat64Array& async_ids_stack();
  inline v8::Local<v8::Array> js_execution_async_resources();
  // Returns the native executionAsyncResource value at stack index `index`.
  // Resources provided on the JS side are not stored on the native stack,
  // in which case an empty `Local<>` is returned.
  // The `js_execution_async_resources` array contains the value in that case.
  inline v8::Local<v8::Object> native_execution_async_resource(size_t index);

void InstallPromiseHooks(v8::Local<v8::Context> ctx);
  void ResetPromiseHooks(v8::Local<v8::Function> init,
                         v8::Local<v8::Function> before,
                         v8::Local<v8::Function> after,
                         v8::Local<v8::Function> resolve);

inline v8::Local<v8::String> provider_string(int idx);

inline void no_force_checks();
  inline Environment* env();

// NB: This call does not take (co-)ownership of `execution_async_resource`.
  // The lifetime of the `v8::Local<>` pointee must last until
  // `pop_async_context()` or `clear_async_id_stack()` are called.
  void push_async_context(double async_id,
                          double trigger_async_id,
                          v8::Local<v8::Object> execution_async_resource);
  bool pop_async_context(double async_id);
  void clear_async_id_stack();  // Used in fatal exceptions.

AsyncHooks(const AsyncHooks&) = delete;
  AsyncHooks& operator=(const AsyncHooks&) = delete;
  AsyncHooks(AsyncHooks&&) = delete;
  AsyncHooks& operator=(AsyncHooks&&) = delete;
  ~AsyncHooks() = default;

// Used to set the kDefaultTriggerAsyncId in a scope. This is instead of
  // passing the trigger_async_id along with other constructor arguments.
  class DefaultTriggerAsyncIdScope {
   public:
    DefaultTriggerAsyncIdScope() = delete;
    explicit DefaultTriggerAsyncIdScope(Environment* env,
                                        double init_trigger_async_id);
    explicit DefaultTriggerAsyncIdScope(AsyncWrap* async_wrap);
    ~DefaultTriggerAsyncIdScope();

DefaultTriggerAsyncIdScope(const DefaultTriggerAsyncIdScope&) = delete;
    DefaultTriggerAsyncIdScope& operator=(const DefaultTriggerAsyncIdScope&) =
        delete;
    DefaultTriggerAsyncIdScope(DefaultTriggerAsyncIdScope&&) = delete;
    DefaultTriggerAsyncIdScope& operator=(DefaultTriggerAsyncIdScope&&) =
        delete;

private:
    AsyncHooks* async_hooks_;
    double old_default_trigger_async_id_;
  };

struct SerializeInfo {
    AliasedBufferIndex async_ids_stack;
    AliasedBufferIndex fields;
    AliasedBufferIndex async_id_fields;
    SnapshotIndex js_execution_async_resources;
    std::vector<SnapshotIndex> native_execution_async_resources;
  };

SerializeInfo Serialize(v8::Local<v8::Context> context,
                          v8::SnapshotCreator* creator);
  void Deserialize(v8::Local<v8::Context> context);

private:
  friend class Environment;  // So we can call the constructor.
  explicit AsyncHooks(v8::Isolate* isolate, const SerializeInfo* info);

[[noreturn]] void FailWithCorruptedAsyncStack(double expected_async_id);

// Stores the ids of the current execution context stack.
  AliasedFloat64Array async_ids_stack_;
  // Attached to a Uint32Array that tracks the number of active hooks for
  // each type.
  AliasedUint32Array fields_;
  // Attached to a Float64Array that tracks the state of async resources.
  AliasedFloat64Array async_id_fields_;

void grow_async_ids_stack();

v8::Global<v8::Array> js_execution_async_resources_;
  std::vector<v8::Local<v8::Object>> native_execution_async_resources_;

// Non-empty during deserialization
  const SerializeInfo* info_ = nullptr;

std::array<v8::Global<v8::Function>, 4> js_promise_hooks_;
};

class ImmediateInfo : public MemoryRetainer {
 public:
  inline AliasedUint32Array& fields();
  inline uint32_t count() const;
  inline uint32_t ref_count() const;
  inline bool has_outstanding() const;
  inline void ref_count_inc(uint32_t increment);
  inline void ref_count_dec(uint32_t decrement);

ImmediateInfo(const ImmediateInfo&) = delete;
  ImmediateInfo& operator=(const ImmediateInfo&) = delete;
  ImmediateInfo(ImmediateInfo&&) = delete;
  ImmediateInfo& operator=(ImmediateInfo&&) = delete;
  ~ImmediateInfo() = default;

SET_MEMORY_INFO_NAME(ImmediateInfo)
  SET_SELF_SIZE(ImmediateInfo)
  void MemoryInfo(MemoryTracker* tracker) const override;

struct SerializeInfo {
    AliasedBufferIndex fields;
  };
  SerializeInfo Serialize(v8::Local<v8::Context> context,
                          v8::SnapshotCreator* creator);
  void Deserialize(v8::Local<v8::Context> context);

private:
  friend class Environment;  // So we can call the constructor.
  explicit ImmediateInfo(v8::Isolate* isolate, const SerializeInfo* info);

enum Fields { kCount, kRefCount, kHasOutstanding, kFieldsCount };

AliasedUint32Array fields_;
};

class TickInfo : public MemoryRetainer {
 public:
  inline AliasedUint8Array& fields();
  inline bool has_tick_scheduled() const;
  inline bool has_rejection_to_warn() const;

SET_MEMORY_INFO_NAME(TickInfo)
  SET_SELF_SIZE(TickInfo)
  void MemoryInfo(MemoryTracker* tracker) const override;

TickInfo(const TickInfo&) = delete;
  TickInfo& operator=(const TickInfo&) = delete;
  TickInfo(TickInfo&&) = delete;
  TickInfo& operator=(TickInfo&&) = delete;
  ~TickInfo() = default;

private:
  friend class Environment;  // So we can call the constructor.
  explicit TickInfo(v8::Isolate* isolate, const SerializeInfo* info);

enum Fields { kHasTickScheduled = 0, kHasRejectionToWarn, kFieldsCount };

AliasedUint8Array fields_;
};

class TrackingTraceStateObserver :
    public v8::TracingController::TraceStateObserver {
 public:
  explicit TrackingTraceStateObserver(Environment* env) : env_(env) {}

void OnTraceEnabled() override {
    UpdateTraceCategoryState();
  }

void OnTraceDisabled() override {
    UpdateTraceCategoryState();
  }

private:
  void UpdateTraceCategoryState();

Environment* env_;
};

class ShouldNotAbortOnUncaughtScope {
 public:
  explicit inline ShouldNotAbortOnUncaughtScope(Environment* env);
  inline void Close();
  inline ~ShouldNotAbortOnUncaughtScope();
  ShouldNotAbortOnUncaughtScope(const ShouldNotAbortOnUncaughtScope&) = delete;
  ShouldNotAbortOnUncaughtScope& operator=(
      const ShouldNotAbortOnUncaughtScope&) = delete;
  ShouldNotAbortOnUncaughtScope(ShouldNotAbortOnUncaughtScope&&) = delete;
  ShouldNotAbortOnUncaughtScope& operator=(ShouldNotAbortOnUncaughtScope&&) =
      delete;

private:
  Environment* env_;
};

typedef void (*DeserializeRequestCallback)(v8::Local<v8::Context> context,
                                           v8::Local<v8::Object> holder,
                                           int index,
                                           InternalFieldInfoBase* info);
struct DeserializeRequest {
  DeserializeRequestCallback cb;
  v8::Global<v8::Object> holder;
  int index;
  InternalFieldInfoBase* info = nullptr;  // Owned by the request
};

struct EnvSerializeInfo {
  AsyncHooks::SerializeInfo async_hooks;
  TickInfo::SerializeInfo tick_info;
  ImmediateInfo::SerializeInfo immediate_info;
  AliasedBufferIndex timeout_info;
  performance::PerformanceState::SerializeInfo performance_state;
  AliasedBufferIndex exiting;
  AliasedBufferIndex stream_base_state;
  AliasedBufferIndex should_abort_on_uncaught_toggle;

RealmSerializeInfo principal_realm;
  friend std::ostream& operator<<(std::ostream& o, const EnvSerializeInfo& i);
};

struct SnapshotMetadata {
  // For now kFullyCustomized is only built with the --build-snapshot CLI flag.
  // We might want to add more types of snapshots in the future.
  enum class Type : uint8_t { kDefault, kFullyCustomized };

Type type;
  std::string node_version;
  std::string node_arch;
  std::string node_platform;
  // Result of v8::ScriptCompiler::CachedDataVersionTag().
  uint32_t v8_cache_version_tag;
};

struct SnapshotData {
  enum class DataOwnership { kOwned, kNotOwned };

static const uint32_t kMagic = 0x143da19;
  static const SnapshotIndex kNodeVMContextIndex = 0;
  static const SnapshotIndex kNodeBaseContextIndex = kNodeVMContextIndex + 1;
  static const SnapshotIndex kNodeMainContextIndex = kNodeBaseContextIndex + 1;

DataOwnership data_ownership = DataOwnership::kOwned;

SnapshotMetadata metadata;

// The result of v8::SnapshotCreator::CreateBlob() during the snapshot
  // building process.
  v8::StartupData v8_snapshot_blob_data{nullptr, 0};

IsolateDataSerializeInfo isolate_data_info;
  // TODO(joyeecheung): there should be a vector of env_info once we snapshot
  // the worker environments.
  EnvSerializeInfo env_info;

// A vector of built-in ids and v8::ScriptCompiler::CachedData, this can be
  // shared across Node.js instances because they are supposed to share the
  // read only space. We use builtins::CodeCacheInfo because
  // v8::ScriptCompiler::CachedData is not copyable.
  std::vector<builtins::CodeCacheInfo> code_cache;

void ToBlob(FILE* out) const;
  // If returns false, the metadata doesn't match the current Node.js binary,
  // and the caller should not consume the snapshot data.
  bool Check() const;
  static bool FromBlob(SnapshotData* out, FILE* in);

~SnapshotData();
};

/**
 * Environment is a per-isolate data structure that represents an execution
 * environment. Each environment has a principal realm. An environment can
 * create multiple subsidiary synthetic realms.
 */
class Environment : public MemoryRetainer {
 public:
  Environment(const Environment&) = delete;
  Environment& operator=(const Environment&) = delete;
  Environment(Environment&&) = delete;
  Environment& operator=(Environment&&) = delete;

SET_MEMORY_INFO_NAME(Environment)

inline size_t SelfSize() const override;
  bool IsRootNode() const override { return true; }
  void MemoryInfo(MemoryTracker* tracker) const override;

EnvSerializeInfo Serialize(v8::SnapshotCreator* creator);
  void DeserializeProperties(const EnvSerializeInfo* info);

void PrintInfoForSnapshotIfDebug();
  void EnqueueDeserializeRequest(DeserializeRequestCallback cb,
                                 v8::Local<v8::Object> holder,
                                 int index,
                                 InternalFieldInfoBase* info);
  void RunDeserializeRequests();
  // Should be called before InitializeInspector()
  void InitializeDiagnostics();

std::string GetCwd();

#if HAVE_INSPECTOR
  // If the environment is created for a worker, pass parent_handle and
  // the ownership if transferred into the Environment.
  int InitializeInspector(
      std::unique_ptr<inspector::ParentInspectorHandle> parent_handle);
#endif

inline size_t async_callback_scope_depth() const;
  inline void PushAsyncCallbackScope();
  inline void PopAsyncCallbackScope();

static inline Environment* GetCurrent(v8::Isolate* isolate);
  static inline Environment* GetCurrent(v8::Local<v8::Context> context);
  static inline Environment* GetCurrent(
      const v8::FunctionCallbackInfo<v8::Value>& info);

template <typename T>
  static inline Environment* GetCurrent(
      const v8::PropertyCallbackInfo<T>& info);

// Create an Environment without initializing a main Context. Use
  // InitializeMainContext() to initialize a main context for it.
  Environment(IsolateData* isolate_data,
              v8::Isolate* isolate,
              const std::vector<std::string>& args,
              const std::vector<std::string>& exec_args,
              const EnvSerializeInfo* env_info,
              EnvironmentFlags::Flags flags,
              ThreadId thread_id);
  void InitializeMainContext(v8::Local<v8::Context> context,
                             const EnvSerializeInfo* env_info);
  // Create an Environment and initialize the provided principal context for it.
  Environment(IsolateData* isolate_data,
              v8::Local<v8::Context> context,
              const std::vector<std::string>& args,
              const std::vector<std::string>& exec_args,
              const EnvSerializeInfo* env_info,
              EnvironmentFlags::Flags flags,
              ThreadId thread_id);
  ~Environment() override;

void InitializeLibuv();
  inline const std::vector<std::string>& exec_argv();
  inline const std::vector<std::string>& argv();
  const std::string& exec_path() const;

typedef void (*HandleCleanupCb)(Environment* env,
                                  uv_handle_t* handle,
                                  void* arg);
  struct HandleCleanup {
    uv_handle_t* handle_;
    HandleCleanupCb cb_;
    void* arg_;
  };

void RegisterHandleCleanups();
  void CleanupHandles();
  void Exit(int code);
  void ExitEnv(StopFlags::Flags flags);

// Register clean-up cb to be called on environment destruction.
  inline void RegisterHandleCleanup(uv_handle_t* handle,
                                    HandleCleanupCb cb,
                                    void* arg);

template <typename T, typename OnCloseCallback>
  inline void CloseHandle(T* handle, OnCloseCallback callback);

void ResetPromiseHooks(v8::Local<v8::Function> init,
                         v8::Local<v8::Function> before,
                         v8::Local<v8::Function> after,
                         v8::Local<v8::Function> resolve);
  void AssignToContext(v8::Local<v8::Context> context,
                       Realm* realm,
                       const ContextInfo& info);
  void TrackContext(v8::Local<v8::Context> context);
  void UntrackContext(v8::Local<v8::Context> context);

void StartProfilerIdleNotifier();

inline v8::Isolate* isolate() const;
  inline uv_loop_t* event_loop() const;
  void TryLoadAddon(const char* filename,
                    int flags,
                    const std::function<bool(binding::DLib*)>& was_loaded);

static inline Environment* from_timer_handle(uv_timer_t* handle);
  inline uv_timer_t* timer_handle();

static inline Environment* from_immediate_check_handle(uv_check_t* handle);
  inline uv_check_t* immediate_check_handle();
  inline uv_idle_t* immediate_idle_handle();

inline void IncreaseWaitingRequestCounter();
  inline void DecreaseWaitingRequestCounter();

inline AsyncHooks* async_hooks();
  inline ImmediateInfo* immediate_info();
  inline AliasedInt32Array& timeout_info();
  inline TickInfo* tick_info();
  inline uint64_t timer_base() const;
  inline std::shared_ptr<KVStore> env_vars();
  inline void set_env_vars(std::shared_ptr<KVStore> env_vars);

inline IsolateData* isolate_data() const;

inline bool printed_error() const;
  inline void set_printed_error(bool value);

void PrintSyncTrace() const;
  inline void set_trace_sync_io(bool value);

inline void set_force_context_aware(bool value);
  inline bool force_context_aware() const;

// This is a pseudo-boolean that keeps track of whether the process is
  // exiting.
  inline void set_exiting(bool value);
  inline AliasedUint32Array& exiting();

// This stores whether the --abort-on-uncaught-exception flag was passed
  // to Node.
  inline bool abort_on_uncaught_exception() const;
  inline void set_abort_on_uncaught_exception(bool value);
  // This is a pseudo-boolean that keeps track of whether an uncaught exception
  // should abort the process or not if --abort-on-uncaught-exception was
  // passed to Node. If the flag was not passed, it is ignored.
  inline AliasedUint32Array& should_abort_on_uncaught_toggle();

inline AliasedInt32Array& stream_base_state();

// The necessary API for async_hooks.
  inline double new_async_id();
  inline double execution_async_id();
  inline double trigger_async_id();
  inline double get_default_trigger_async_id();

// List of id's that have been destroyed and need the destroy() cb called.
  inline std::vector<double>* destroy_async_id_list();

builtins::BuiltinLoader* builtin_loader();

std::unordered_multimap<int, loader::ModuleWrap*> hash_to_module_map;
  std::unordered_map<uint32_t, loader::ModuleWrap*> id_to_module_map;
  std::unordered_map<uint32_t, contextify::ContextifyScript*>
      id_to_script_map;
  std::unordered_map<uint32_t, contextify::CompiledFnEntry*> id_to_function_map;

inline uint32_t get_next_module_id();
  inline uint32_t get_next_script_id();
  inline uint32_t get_next_function_id();

EnabledDebugList* enabled_debug_list() { return &enabled_debug_list_; }

inline performance::PerformanceState* performance_state();

void CollectUVExceptionInfo(v8::Local<v8::Value> context,
                              int errorno,
                              const char* syscall = nullptr,
                              const char* message = nullptr,
                              const char* path = nullptr,
                              const char* dest = nullptr);

// If this flag is set, calls into JS (if they would be observable
  // from userland) must be avoided.  This flag does not indicate whether
  // calling into JS is allowed from a VM perspective at this point.
  inline bool can_call_into_js() const;
  inline void set_can_call_into_js(bool can_call_into_js);

// Increase or decrease a counter that manages whether this Environment
  // keeps the event loop alive on its own or not. The counter starts out at 0,
  // meaning it does not, and any positive value will make it keep the event
  // loop alive.
  // This is used by Workers to manage their own .ref()/.unref() implementation,
  // as Workers aren't directly associated with their own libuv handles.
  void add_refs(int64_t diff);

// Convenient getter of the principal realm's has_run_bootstrapping_code().
  inline bool has_run_bootstrapping_code() const;

inline bool has_serialized_options() const;
  inline void set_has_serialized_options(bool has_serialized_options);

inline bool is_main_thread() const;
  inline bool no_native_addons() const;
  inline bool should_not_register_esm_loader() const;
  inline bool should_create_inspector() const;
  inline bool owns_process_state() const;
  inline bool owns_inspector() const;
  inline bool tracks_unmanaged_fds() const;
  inline bool hide_console_windows() const;
  inline bool no_global_search_paths() const;
  inline bool no_browser_globals() const;
  inline uint64_t thread_id() const;
  inline worker::Worker* worker_context() const;
  Environment* worker_parent_env() const;
  inline void add_sub_worker_context(worker::Worker* context);
  inline void remove_sub_worker_context(worker::Worker* context);
  void stop_sub_worker_contexts();
  template <typename Fn>
  inline void ForEachWorker(Fn&& iterator);
  // Determine if the environment is stopping. This getter is thread-safe.
  inline bool is_stopping() const;
  inline void set_stopping(bool value);
  inline std::list<node_module>* extra_linked_bindings();
  inline node_module* extra_linked_bindings_head();
  inline node_module* extra_linked_bindings_tail();
  inline const Mutex& extra_linked_bindings_mutex() const;

inline bool filehandle_close_warning() const;
  inline void set_filehandle_close_warning(bool on);

inline void set_source_maps_enabled(bool on);
  inline bool source_maps_enabled() const;

inline void ThrowError(const char* errmsg);
  inline void ThrowTypeError(const char* errmsg);
  inline void ThrowRangeError(const char* errmsg);
  inline void ThrowErrnoException(int errorno,
                                  const char* syscall = nullptr,
                                  const char* message = nullptr,
                                  const char* path = nullptr);
  inline void ThrowUVException(int errorno,
                               const char* syscall = nullptr,
                               const char* message = nullptr,
                               const char* path = nullptr,
                               const char* dest = nullptr);

void AtExit(void (*cb)(void* arg), void* arg);
  void RunAtExitCallbacks();

void RunWeakRefCleanup();

v8::MaybeLocal<v8::Value> RunSnapshotSerializeCallback() const;
  v8::MaybeLocal<v8::Value> RunSnapshotDeserializeCallback() const;
  v8::MaybeLocal<v8::Value> RunSnapshotDeserializeMain() const;

// Primitive values are shared across realms.
  // The getters simply proxy to the per-isolate primitive.
#define VP(PropertyName, StringValue) V(v8::Private, PropertyName)
#define VY(PropertyName, StringValue) V(v8::Symbol, PropertyName)
#define VS(PropertyName, StringValue) V(v8::String, PropertyName)
#define V(TypeName, PropertyName)                                             \
  inline v8::Local<TypeName> PropertyName() const;
  PER_ISOLATE_PRIVATE_SYMBOL_PROPERTIES(VP)
  PER_ISOLATE_SYMBOL_PROPERTIES(VY)
  PER_ISOLATE_STRING_PROPERTIES(VS)
#undef V
#undef VS
#undef VY
#undef VP

#define V(PropertyName, TypeName)                                             \
  inline v8::Local<TypeName> PropertyName() const;                            \
  inline void set_ ## PropertyName(v8::Local<TypeName> value);
  PER_ISOLATE_TEMPLATE_PROPERTIES(V)
  // Per-realm strong persistent values of the principal realm.
  // Get/set the value with an explicit realm instead when possible.
  // Deprecate soon.
  PER_REALM_STRONG_PERSISTENT_VALUES(V)
#undef V

// Return the context of the principal realm.
  // Get the context with an explicit realm instead when possible.
  // Deprecate soon.
  inline v8::Local<v8::Context> context() const;
  inline Realm* principal_realm() const;

#if HAVE_INSPECTOR
  inline inspector::Agent* inspector_agent() const {
    return inspector_agent_.get();
  }

inline bool is_in_inspector_console_call() const;
  inline void set_is_in_inspector_console_call(bool value);
#endif

typedef ListHead<HandleWrap, &HandleWrap::handle_wrap_queue_> HandleWrapQueue;
  typedef ListHead<ReqWrapBase, &ReqWrapBase::req_wrap_queue_> ReqWrapQueue;

inline HandleWrapQueue* handle_wrap_queue() { return &handle_wrap_queue_; }
  inline ReqWrapQueue* req_wrap_queue() { return &req_wrap_queue_; }

inline bool EmitProcessEnvWarning() {
    bool current_value = emit_env_nonstring_warning_;
    emit_env_nonstring_warning_ = false;
    return current_value;
  }

inline bool EmitErrNameWarning() {
    bool current_value = emit_err_name_warning_;
    emit_err_name_warning_ = false;
    return current_value;
  }

// cb will be called as cb(env) on the next event loop iteration.
  // Unlike the JS setImmediate() function, nested SetImmediate() calls will
  // be run without returning control to the event loop, similar to nextTick().
  template <typename Fn>
  inline void SetImmediate(
      Fn&& cb, CallbackFlags::Flags flags = CallbackFlags::kRefed);
  template <typename Fn>
  // This behaves like SetImmediate() but can be called from any thread.
  inline void SetImmediateThreadsafe(
      Fn&& cb, CallbackFlags::Flags flags = CallbackFlags::kRefed);
  // This behaves like V8's Isolate::RequestInterrupt(), but also accounts for
  // the event loop (i.e. combines the V8 function with SetImmediate()).
  // The passed callback may not throw exceptions.
  // This function can be called from any thread.
  template <typename Fn>
  inline void RequestInterrupt(Fn&& cb);
  // This needs to be available for the JS-land setImmediate().
  void ToggleImmediateRef(bool ref);

inline void PushShouldNotAbortOnUncaughtScope();
  inline void PopShouldNotAbortOnUncaughtScope();
  inline bool inside_should_not_abort_on_uncaught_scope() const;

static inline Environment* ForAsyncHooks(AsyncHooks* hooks);

v8::Local<v8::Value> GetNow();
  void ScheduleTimer(int64_t duration);
  void ToggleTimerRef(bool ref);

inline void AddCleanupHook(CleanupQueue::Callback cb, void* arg);
  inline void RemoveCleanupHook(CleanupQueue::Callback cb, void* arg);
  void RunCleanup();

static size_t NearHeapLimitCallback(void* data,
                                      size_t current_heap_limit,
                                      size_t initial_heap_limit);
  static void BuildEmbedderGraph(v8::Isolate* isolate,
                                 v8::EmbedderGraph* graph,
                                 void* data);

inline std::shared_ptr<EnvironmentOptions> options();
  inline std::shared_ptr<ExclusiveAccess<HostPort>> inspector_host_port();

inline int32_t stack_trace_limit() const { return 10; }

#if HAVE_INSPECTOR
  void set_coverage_connection(
      std::unique_ptr<profiler::V8CoverageConnection> connection);
  profiler::V8CoverageConnection* coverage_connection();

inline void set_coverage_directory(const char* directory);
  inline const std::string& coverage_directory() const;

void set_cpu_profiler_connection(
      std::unique_ptr<profiler::V8CpuProfilerConnection> connection);
  profiler::V8CpuProfilerConnection* cpu_profiler_connection();

inline void set_cpu_prof_name(const std::string& name);
  inline const std::string& cpu_prof_name() const;

inline void set_cpu_prof_interval(uint64_t interval);
  inline uint64_t cpu_prof_interval() const;

inline void set_cpu_prof_dir(const std::string& dir);
  inline const std::string& cpu_prof_dir() const;

void set_heap_profiler_connection(
      std::unique_ptr<profiler::V8HeapProfilerConnection> connection);
  profiler::V8HeapProfilerConnection* heap_profiler_connection();

inline void set_heap_prof_name(const std::string& name);
  inline const std::string& heap_prof_name() const;

inline void set_heap_prof_dir(const std::string& dir);
  inline const std::string& heap_prof_dir() const;

inline void set_heap_prof_interval(uint64_t interval);
  inline uint64_t heap_prof_interval() const;

#endif  // HAVE_INSPECTOR

inline void set_process_exit_handler(
      std::function<void(Environment*, int)>&& handler);

void RunAndClearNativeImmediates(bool only_refed = false);
  void RunAndClearInterrupts();

uv_buf_t allocate_managed_buffer(const size_t suggested_size);
  std::unique_ptr<v8::BackingStore> release_managed_buffer(const uv_buf_t& buf);

void AddUnmanagedFd(int fd);
  void RemoveUnmanagedFd(int fd);

template <typename T>
  void ForEachRealm(T&& iterator) const;

inline void set_heap_snapshot_near_heap_limit(uint32_t limit);
  inline bool is_in_heapsnapshot_heap_limit_callback() const;

inline void AddHeapSnapshotNearHeapLimitCallback();

inline void RemoveHeapSnapshotNearHeapLimitCallback(size_t heap_limit);

private:
  inline void ThrowError(v8::Local<v8::Value> (*fun)(v8::Local<v8::String>),
                         const char* errmsg);

std::list<binding::DLib> loaded_addons_;
  v8::Isolate* const isolate_;
  IsolateData* const isolate_data_;
  uv_timer_t timer_handle_;
  uv_check_t immediate_check_handle_;
  uv_idle_t immediate_idle_handle_;
  uv_prepare_t idle_prepare_handle_;
  uv_check_t idle_check_handle_;
  uv_async_t task_queues_async_;
  int64_t task_queues_async_refs_ = 0;

// These may be read by ctors and should be listed before complex fields.
  std::atomic_bool is_stopping_{false};
  std::atomic_bool can_call_into_js_{true};

AsyncHooks async_hooks_;
  ImmediateInfo immediate_info_;
  AliasedInt32Array timeout_info_;
  TickInfo tick_info_;
  const uint64_t timer_base_;
  std::shared_ptr<KVStore> env_vars_;
  bool printed_error_ = false;
  bool trace_sync_io_ = false;
  bool emit_env_nonstring_warning_ = true;
  bool emit_err_name_warning_ = true;
  bool emit_filehandle_warning_ = true;
  bool source_maps_enabled_ = false;

size_t async_callback_scope_depth_ = 0;
  std::vector<double> destroy_async_id_list_;

#if HAVE_INSPECTOR
  std::unique_ptr<profiler::V8CoverageConnection> coverage_connection_;
  std::unique_ptr<profiler::V8CpuProfilerConnection> cpu_profiler_connection_;
  std::string coverage_directory_;
  std::string cpu_prof_dir_;
  std::string cpu_prof_name_;
  uint64_t cpu_prof_interval_;
  std::unique_ptr<profiler::V8HeapProfilerConnection> heap_profiler_connection_;
  std::string heap_prof_dir_;
  std::string heap_prof_name_;
  uint64_t heap_prof_interval_;
#endif  // HAVE_INSPECTOR

std::shared_ptr<EnvironmentOptions> options_;
  // options_ contains debug options parsed from CLI arguments,
  // while inspector_host_port_ stores the actual inspector host
  // and port being used. For example the port is -1 by default
  // and can be specified as 0 (meaning any port allocated when the
  // server starts listening), but when the inspector server starts
  // the inspector_host_port_->port() will be the actual port being
  // used.
  std::shared_ptr<ExclusiveAccess<HostPort>> inspector_host_port_;
  std::vector<std::string> exec_argv_;
  std::vector<std::string> argv_;
  std::string exec_path_;

bool is_in_heapsnapshot_heap_limit_callback_ = false;
  uint32_t heap_limit_snapshot_taken_ = 0;
  uint32_t heap_snapshot_near_heap_limit_ = 0;
  bool heapsnapshot_near_heap_limit_callback_added_ = false;

uint32_t module_id_counter_ = 0;
  uint32_t script_id_counter_ = 0;
  uint32_t function_id_counter_ = 0;

AliasedUint32Array exiting_;

AliasedUint32Array should_abort_on_uncaught_toggle_;
  int should_not_abort_scope_counter_ = 0;

std::unique_ptr<TrackingTraceStateObserver> trace_state_observer_;

AliasedInt32Array stream_base_state_;

uint64_t environment_start_time_;
  std::unique_ptr<performance::PerformanceState> performance_state_;

bool has_serialized_options_ = false;

uint64_t flags_;
  uint64_t thread_id_;
  std::unordered_set<worker::Worker*> sub_worker_contexts_;

#if HAVE_INSPECTOR
  std::unique_ptr<inspector::Agent> inspector_agent_;
  bool is_in_inspector_console_call_ = false;
#endif

std::list<DeserializeRequest> deserialize_requests_;

// handle_wrap_queue_ and req_wrap_queue_ needs to be at a fixed offset from
  // the start of the class because it is used by
  // src/node_postmortem_metadata.cc to calculate offsets and generate debug
  // symbols for Environment, which assumes that the position of members in
  // memory are predictable. For more information please refer to
  // `doc/contributing/node-postmortem-support.md`
  friend int GenDebugSymbols();
  HandleWrapQueue handle_wrap_queue_;
  ReqWrapQueue req_wrap_queue_;
  std::list<HandleCleanup> handle_cleanup_queue_;
  int handle_cleanup_waiting_ = 0;
  int request_waiting_ = 0;

EnabledDebugList enabled_debug_list_;

std::vector<v8::Global<v8::Context>> contexts_;
  std::list<node_module> extra_linked_bindings_;
  Mutex extra_linked_bindings_mutex_;

static void RunTimers(uv_timer_t* handle);

struct ExitCallback {
    void (*cb_)(void* arg);
    void* arg_;
  };

std::list<ExitCallback> at_exit_functions_;

typedef CallbackQueue<void, Environment*> NativeImmediateQueue;
  NativeImmediateQueue native_immediates_;
  Mutex native_immediates_threadsafe_mutex_;
  NativeImmediateQueue native_immediates_threadsafe_;
  NativeImmediateQueue native_immediates_interrupts_;
  // Also guarded by native_immediates_threadsafe_mutex_. This can be used when
  // trying to post tasks from other threads to an Environment, as the libuv
  // handle for the immediate queues (task_queues_async_) may not be initialized
  // yet or already have been destroyed.
  bool task_queues_async_initialized_ = false;

std::atomic<Environment**> interrupt_data_ {nullptr};
  void RequestInterruptFromV8();
  static void CheckImmediate(uv_check_t* handle);

CleanupQueue cleanup_queue_;
  bool started_cleanup_ = false;

std::unordered_set<int> unmanaged_fds_;

std::function<void(Environment*, int)> process_exit_handler_ {
      DefaultProcessExitHandler };

std::unique_ptr<Realm> principal_realm_ = nullptr;

builtins::BuiltinLoader builtin_loader_;

// Used by allocate_managed_buffer() and release_managed_buffer() to keep
  // track of the BackingStore for a given pointer.
  std::unordered_map<char*, std::unique_ptr<v8::BackingStore>>
      released_allocated_buffers_;
};

}  // namespace node

#endif  // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS

#endif  // SRC_ENV_H_