GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: api/environment.cc Lines: 346 396 87.4 %
Date: 2022-07-21 04:16:21 Branches: 111 192 57.8 %

Line Branch Exec Source
1
#include "node.h"
2
#include "node_context_data.h"
3
#include "node_errors.h"
4
#include "node_internals.h"
5
#include "node_native_module.h"
6
#include "node_options-inl.h"
7
#include "node_platform.h"
8
#include "node_shadow_realm.h"
9
#include "node_v8_platform-inl.h"
10
#include "node_wasm_web_api.h"
11
#include "uv.h"
12
13
#if HAVE_INSPECTOR
14
#include "inspector/worker_inspector.h"  // ParentInspectorHandle
15
#endif
16
17
namespace node {
18
using errors::TryCatchScope;
19
using v8::Array;
20
using v8::Context;
21
using v8::EscapableHandleScope;
22
using v8::Function;
23
using v8::FunctionCallbackInfo;
24
using v8::HandleScope;
25
using v8::Isolate;
26
using v8::Just;
27
using v8::Local;
28
using v8::Maybe;
29
using v8::MaybeLocal;
30
using v8::Nothing;
31
using v8::Null;
32
using v8::Object;
33
using v8::ObjectTemplate;
34
using v8::Private;
35
using v8::PropertyDescriptor;
36
using v8::SealHandleScope;
37
using v8::String;
38
using v8::Value;
39
40
371
bool AllowWasmCodeGenerationCallback(Local<Context> context,
41
                                     Local<String>) {
42
  Local<Value> wasm_code_gen =
43
742
      context->GetEmbedderData(ContextEmbedderIndex::kAllowWasmCodeGeneration);
44

1113
  return wasm_code_gen->IsUndefined() || wasm_code_gen->IsTrue();
45
}
46
47
33
bool ShouldAbortOnUncaughtException(Isolate* isolate) {
48
33
  DebugSealHandleScope scope(isolate);
49
33
  Environment* env = Environment::GetCurrent(isolate);
50
33
  return env != nullptr &&
51

68
         (env->is_main_thread() || !env->is_stopping()) &&
52
63
         env->abort_on_uncaught_exception() &&
53
96
         env->should_abort_on_uncaught_toggle()[0] &&
54
34
         !env->inside_should_not_abort_on_uncaught_scope();
55
}
56
57
69055
MaybeLocal<Value> PrepareStackTraceCallback(Local<Context> context,
58
                                            Local<Value> exception,
59
                                            Local<Array> trace) {
60
69055
  Environment* env = Environment::GetCurrent(context);
61
69055
  if (env == nullptr) {
62
    return exception->ToString(context).FromMaybe(Local<Value>());
63
  }
64
69055
  Local<Function> prepare = env->prepare_stack_trace_callback();
65
69055
  if (prepare.IsEmpty()) {
66
    return exception->ToString(context).FromMaybe(Local<Value>());
67
  }
68
  Local<Value> args[] = {
69
      context->Global(),
70
      exception,
71
      trace,
72
138110
  };
73
  // This TryCatch + Rethrow is required by V8 due to details around exception
74
  // handling there. For C++ callbacks, V8 expects a scheduled exception (which
75
  // is what ReThrow gives us). Just returning the empty MaybeLocal would leave
76
  // us with a pending exception.
77
69055
  TryCatchScope try_catch(env);
78
  MaybeLocal<Value> result = prepare->Call(
79
138110
      context, Undefined(env->isolate()), arraysize(args), args);
80

69055
  if (try_catch.HasCaught() && !try_catch.HasTerminated()) {
81
2
    try_catch.ReThrow();
82
  }
83
69055
  return result;
84
}
85
86
395797
void* NodeArrayBufferAllocator::Allocate(size_t size) {
87
  void* ret;
88

395797
  if (zero_fill_field_ || per_process::cli_options->zero_fill_all_buffers)
89
70378
    ret = allocator_->Allocate(size);
90
  else
91
325419
    ret = allocator_->AllocateUninitialized(size);
92
395797
  if (LIKELY(ret != nullptr))
93
395797
    total_mem_usage_.fetch_add(size, std::memory_order_relaxed);
94
395797
  return ret;
95
}
96
97
162010
void* NodeArrayBufferAllocator::AllocateUninitialized(size_t size) {
98
162010
  void* ret = allocator_->AllocateUninitialized(size);
99
162010
  if (LIKELY(ret != nullptr))
100
162010
    total_mem_usage_.fetch_add(size, std::memory_order_relaxed);
101
162010
  return ret;
102
}
103
104
63858
void* NodeArrayBufferAllocator::Reallocate(
105
    void* data, size_t old_size, size_t size) {
106
63858
  void* ret = allocator_->Reallocate(data, old_size, size);
107

63858
  if (LIKELY(ret != nullptr) || UNLIKELY(size == 0))
108
63858
    total_mem_usage_.fetch_add(size - old_size, std::memory_order_relaxed);
109
63858
  return ret;
110
}
111
112
539788
void NodeArrayBufferAllocator::Free(void* data, size_t size) {
113
539788
  total_mem_usage_.fetch_sub(size, std::memory_order_relaxed);
114
539788
  allocator_->Free(data, size);
115
539788
}
116
117
12
DebuggingArrayBufferAllocator::~DebuggingArrayBufferAllocator() {
118
6
  CHECK(allocations_.empty());
119
12
}
120
121
78
void* DebuggingArrayBufferAllocator::Allocate(size_t size) {
122
78
  Mutex::ScopedLock lock(mutex_);
123
78
  void* data = NodeArrayBufferAllocator::Allocate(size);
124
78
  RegisterPointerInternal(data, size);
125
78
  return data;
126
}
127
128
41
void* DebuggingArrayBufferAllocator::AllocateUninitialized(size_t size) {
129
41
  Mutex::ScopedLock lock(mutex_);
130
41
  void* data = NodeArrayBufferAllocator::AllocateUninitialized(size);
131
41
  RegisterPointerInternal(data, size);
132
41
  return data;
133
}
134
135
119
void DebuggingArrayBufferAllocator::Free(void* data, size_t size) {
136
238
  Mutex::ScopedLock lock(mutex_);
137
119
  UnregisterPointerInternal(data, size);
138
119
  NodeArrayBufferAllocator::Free(data, size);
139
119
}
140
141
void* DebuggingArrayBufferAllocator::Reallocate(void* data,
142
                                                size_t old_size,
143
                                                size_t size) {
144
  Mutex::ScopedLock lock(mutex_);
145
  void* ret = NodeArrayBufferAllocator::Reallocate(data, old_size, size);
146
  if (ret == nullptr) {
147
    if (size == 0) {  // i.e. equivalent to free().
148
      // suppress coverity warning as data is used as key versus as pointer
149
      // in UnregisterPointerInternal
150
      // coverity[pass_freed_arg]
151
      UnregisterPointerInternal(data, old_size);
152
    }
153
    return nullptr;
154
  }
155
156
  if (data != nullptr) {
157
    auto it = allocations_.find(data);
158
    CHECK_NE(it, allocations_.end());
159
    allocations_.erase(it);
160
  }
161
162
  RegisterPointerInternal(ret, size);
163
  return ret;
164
}
165
166
void DebuggingArrayBufferAllocator::RegisterPointer(void* data, size_t size) {
167
  Mutex::ScopedLock lock(mutex_);
168
  NodeArrayBufferAllocator::RegisterPointer(data, size);
169
  RegisterPointerInternal(data, size);
170
}
171
172
void DebuggingArrayBufferAllocator::UnregisterPointer(void* data, size_t size) {
173
  Mutex::ScopedLock lock(mutex_);
174
  NodeArrayBufferAllocator::UnregisterPointer(data, size);
175
  UnregisterPointerInternal(data, size);
176
}
177
178
119
void DebuggingArrayBufferAllocator::UnregisterPointerInternal(void* data,
179
                                                              size_t size) {
180
119
  if (data == nullptr) return;
181
119
  auto it = allocations_.find(data);
182
119
  CHECK_NE(it, allocations_.end());
183
119
  if (size > 0) {
184
    // We allow allocations with size 1 for 0-length buffers to avoid having
185
    // to deal with nullptr values.
186
119
    CHECK_EQ(it->second, size);
187
  }
188
119
  allocations_.erase(it);
189
}
190
191
119
void DebuggingArrayBufferAllocator::RegisterPointerInternal(void* data,
192
                                                            size_t size) {
193
119
  if (data == nullptr) return;
194
119
  CHECK_EQ(allocations_.count(data), 0);
195
119
  allocations_[data] = size;
196
}
197
198
6583
std::unique_ptr<ArrayBufferAllocator> ArrayBufferAllocator::Create(bool debug) {
199

6583
  if (debug || per_process::cli_options->debug_arraybuffer_allocations)
200
3
    return std::make_unique<DebuggingArrayBufferAllocator>();
201
  else
202
6580
    return std::make_unique<NodeArrayBufferAllocator>();
203
}
204
205
57
ArrayBufferAllocator* CreateArrayBufferAllocator() {
206
57
  return ArrayBufferAllocator::Create().release();
207
}
208
209
57
void FreeArrayBufferAllocator(ArrayBufferAllocator* allocator) {
210
57
  delete allocator;
211
57
}
212
213
6581
void SetIsolateCreateParamsForNode(Isolate::CreateParams* params) {
214
6581
  const uint64_t constrained_memory = uv_get_constrained_memory();
215
13156
  const uint64_t total_memory = constrained_memory > 0 ?
216
6575
      std::min(uv_get_total_memory(), constrained_memory) :
217
6
      uv_get_total_memory();
218
6581
  if (total_memory > 0) {
219
    // V8 defaults to 700MB or 1.4GB on 32 and 64 bit platforms respectively.
220
    // This default is based on browser use-cases. Tell V8 to configure the
221
    // heap based on the actual physical memory.
222
6581
    params->constraints.ConfigureDefaults(total_memory, 0);
223
  }
224
6581
  params->embedder_wrapper_object_index = BaseObject::InternalFields::kSlot;
225
6581
  params->embedder_wrapper_type_index = std::numeric_limits<int>::max();
226
6581
}
227
228
6581
void SetIsolateErrorHandlers(v8::Isolate* isolate, const IsolateSettings& s) {
229
6581
  if (s.flags & MESSAGE_LISTENER_WITH_ERROR_LEVEL)
230
6581
    isolate->AddMessageListenerWithErrorLevel(
231
            errors::PerIsolateMessageListener,
232
            Isolate::MessageErrorLevel::kMessageError |
233
                Isolate::MessageErrorLevel::kMessageWarning);
234
235
6581
  auto* abort_callback = s.should_abort_on_uncaught_exception_callback ?
236
      s.should_abort_on_uncaught_exception_callback :
237
      ShouldAbortOnUncaughtException;
238
6581
  isolate->SetAbortOnUncaughtExceptionCallback(abort_callback);
239
240
6581
  auto* fatal_error_cb = s.fatal_error_callback ?
241
      s.fatal_error_callback : OnFatalError;
242
6581
  isolate->SetFatalErrorHandler(fatal_error_cb);
243
244
6581
  if ((s.flags & SHOULD_NOT_SET_PREPARE_STACK_TRACE_CALLBACK) == 0) {
245
6581
    auto* prepare_stack_trace_cb = s.prepare_stack_trace_callback ?
246
        s.prepare_stack_trace_callback : PrepareStackTraceCallback;
247
6581
    isolate->SetPrepareStackTraceCallback(prepare_stack_trace_cb);
248
  }
249
6581
}
250
251
6587
void SetIsolateMiscHandlers(v8::Isolate* isolate, const IsolateSettings& s) {
252
6587
  isolate->SetMicrotasksPolicy(s.policy);
253
254
6587
  auto* allow_wasm_codegen_cb = s.allow_wasm_code_generation_callback ?
255
    s.allow_wasm_code_generation_callback : AllowWasmCodeGenerationCallback;
256
6587
  isolate->SetAllowWasmCodeGenerationCallback(allow_wasm_codegen_cb);
257
6587
  isolate->SetModifyCodeGenerationFromStringsCallback(
258
      ModifyCodeGenerationFromStrings);
259
260
13174
  Mutex::ScopedLock lock(node::per_process::cli_options_mutex);
261
6587
  if (per_process::cli_options->get_per_isolate_options()
262
6587
          ->get_per_env_options()
263
6587
          ->experimental_fetch) {
264
6586
    isolate->SetWasmStreamingCallback(wasm_web_api::StartStreamingCompilation);
265
  }
266
267
6587
  if (per_process::cli_options->get_per_isolate_options()
268
6587
          ->experimental_shadow_realm) {
269
1
    isolate->SetHostCreateShadowRealmContextCallback(
270
        shadow_realm::HostCreateShadowRealmContextCallback);
271
  }
272
273
6587
  if ((s.flags & SHOULD_NOT_SET_PROMISE_REJECTION_CALLBACK) == 0) {
274
6587
    auto* promise_reject_cb = s.promise_reject_callback ?
275
      s.promise_reject_callback : PromiseRejectCallback;
276
6587
    isolate->SetPromiseRejectCallback(promise_reject_cb);
277
  }
278
279
6587
  if (s.flags & DETAILED_SOURCE_POSITIONS_FOR_PROFILING)
280
6587
    v8::CpuProfiler::UseDetailedSourcePositionsForProfiling(isolate);
281
6587
}
282
283
1320
void SetIsolateUpForNode(v8::Isolate* isolate,
284
                         const IsolateSettings& settings) {
285
1320
  SetIsolateErrorHandlers(isolate, settings);
286
1320
  SetIsolateMiscHandlers(isolate, settings);
287
1320
}
288
289
1320
void SetIsolateUpForNode(v8::Isolate* isolate) {
290
1320
  IsolateSettings settings;
291
1320
  SetIsolateUpForNode(isolate, settings);
292
1320
}
293
294
// TODO(joyeecheung): we may want to expose this, but then we need to be
295
// careful about what we override in the params.
296
63
Isolate* NewIsolate(Isolate::CreateParams* params,
297
                    uv_loop_t* event_loop,
298
                    MultiIsolatePlatform* platform) {
299
63
  Isolate* isolate = Isolate::Allocate();
300
63
  if (isolate == nullptr) return nullptr;
301
302
  // Register the isolate on the platform before the isolate gets initialized,
303
  // so that the isolate can access the platform during initialization.
304
63
  platform->RegisterIsolate(isolate, event_loop);
305
306
63
  SetIsolateCreateParamsForNode(params);
307
63
  Isolate::Initialize(isolate, *params);
308
63
  SetIsolateUpForNode(isolate);
309
310
63
  return isolate;
311
}
312
313
55
Isolate* NewIsolate(ArrayBufferAllocator* allocator,
314
                    uv_loop_t* event_loop,
315
                    MultiIsolatePlatform* platform) {
316
110
  Isolate::CreateParams params;
317
55
  if (allocator != nullptr) params.array_buffer_allocator = allocator;
318
55
  return NewIsolate(&params, event_loop, platform);
319
}
320
321
8
Isolate* NewIsolate(std::shared_ptr<ArrayBufferAllocator> allocator,
322
                    uv_loop_t* event_loop,
323
                    MultiIsolatePlatform* platform) {
324
16
  Isolate::CreateParams params;
325
8
  if (allocator) params.array_buffer_allocator_shared = allocator;
326
8
  return NewIsolate(&params, event_loop, platform);
327
}
328
329
1305
IsolateData* CreateIsolateData(Isolate* isolate,
330
                               uv_loop_t* loop,
331
                               MultiIsolatePlatform* platform,
332
                               ArrayBufferAllocator* allocator) {
333
1305
  return new IsolateData(isolate, loop, platform, allocator);
334
}
335
336
1303
void FreeIsolateData(IsolateData* isolate_data) {
337
1303
  delete isolate_data;
338
1303
}
339
340
2966
InspectorParentHandle::~InspectorParentHandle() {}
341
342
// Hide the internal handle class from the public API.
343
#if HAVE_INSPECTOR
344
struct InspectorParentHandleImpl : public InspectorParentHandle {
345
  std::unique_ptr<inspector::ParentInspectorHandle> impl;
346
347
1483
  explicit InspectorParentHandleImpl(
348
      std::unique_ptr<inspector::ParentInspectorHandle>&& impl)
349
1483
    : impl(std::move(impl)) {}
350
};
351
#endif
352
353
1294
Environment* CreateEnvironment(
354
    IsolateData* isolate_data,
355
    Local<Context> context,
356
    const std::vector<std::string>& args,
357
    const std::vector<std::string>& exec_args,
358
    EnvironmentFlags::Flags flags,
359
    ThreadId thread_id,
360
    std::unique_ptr<InspectorParentHandle> inspector_parent_handle) {
361
1294
  Isolate* isolate = context->GetIsolate();
362
2588
  HandleScope handle_scope(isolate);
363
1294
  Context::Scope context_scope(context);
364
  // TODO(addaleax): This is a much better place for parsing per-Environment
365
  // options than the global parse call.
366
  Environment* env = new Environment(
367
1294
      isolate_data, context, args, exec_args, nullptr, flags, thread_id);
368
#if HAVE_INSPECTOR
369
1294
  if (env->should_create_inspector()) {
370
1294
    if (inspector_parent_handle) {
371
1247
      env->InitializeInspector(
372
          std::move(static_cast<InspectorParentHandleImpl*>(
373
1247
              inspector_parent_handle.get())->impl));
374
    } else {
375
47
      env->InitializeInspector({});
376
    }
377
  }
378
#endif
379
380
2588
  if (env->RunBootstrapping().IsEmpty()) {
381
    FreeEnvironment(env);
382
    return nullptr;
383
  }
384
385
1294
  return env;
386
}
387
388
6040
void FreeEnvironment(Environment* env) {
389
6040
  Isolate* isolate = env->isolate();
390
  Isolate::DisallowJavascriptExecutionScope disallow_js(isolate,
391
12080
      Isolate::DisallowJavascriptExecutionScope::THROW_ON_FAILURE);
392
  {
393
12080
    HandleScope handle_scope(isolate);  // For env->context().
394
6040
    Context::Scope context_scope(env->context());
395
12080
    SealHandleScope seal_handle_scope(isolate);
396
397
6040
    env->set_stopping(true);
398
6040
    env->stop_sub_worker_contexts();
399
6040
    env->RunCleanup();
400
6040
    RunAtExit(env);
401
  }
402
403
  // This call needs to be made while the `Environment` is still alive
404
  // because we assume that it is available for async tracking in the
405
  // NodePlatform implementation.
406
6040
  MultiIsolatePlatform* platform = env->isolate_data()->platform();
407
6040
  if (platform != nullptr)
408
6040
    platform->DrainTasks(isolate);
409
410
6040
  delete env;
411
6040
}
412
413
1483
NODE_EXTERN std::unique_ptr<InspectorParentHandle> GetInspectorParentHandle(
414
    Environment* env,
415
    ThreadId thread_id,
416
    const char* url) {
417
1483
  CHECK_NOT_NULL(env);
418
1483
  CHECK_NE(thread_id.id, static_cast<uint64_t>(-1));
419
#if HAVE_INSPECTOR
420
2966
  return std::make_unique<InspectorParentHandleImpl>(
421
4449
      env->inspector_agent()->GetParentHandle(thread_id.id, url));
422
#else
423
  return {};
424
#endif
425
}
426
427
6528
MaybeLocal<Value> LoadEnvironment(
428
    Environment* env,
429
    StartExecutionCallback cb) {
430
6528
  env->InitializeLibuv();
431
6528
  env->InitializeDiagnostics();
432
433
6528
  return StartExecution(env, cb);
434
}
435
436
17
MaybeLocal<Value> LoadEnvironment(
437
    Environment* env,
438
    const char* main_script_source_utf8) {
439
17
  CHECK_NOT_NULL(main_script_source_utf8);
440
17
  Isolate* isolate = env->isolate();
441
  return LoadEnvironment(
442
      env,
443
17
      [&](const StartExecutionCallbackInfo& info) -> MaybeLocal<Value> {
444
        // This is a slightly hacky way to convert UTF-8 to UTF-16.
445
        Local<String> str =
446
34
            String::NewFromUtf8(isolate,
447
17
                                main_script_source_utf8).ToLocalChecked();
448
32
        auto main_utf16 = std::make_unique<String::Value>(isolate, str);
449
450
        // TODO(addaleax): Avoid having a global table for all scripts.
451
32
        std::string name = "embedder_main_" + std::to_string(env->thread_id());
452
17
        native_module::NativeModuleLoader::Add(
453
17
            name.c_str(), UnionBytes(**main_utf16, main_utf16->length()));
454
17
        env->set_main_utf16(std::move(main_utf16));
455
        std::vector<Local<String>> params = {
456
17
            env->process_string(),
457
32
            env->require_string()};
458
        std::vector<Local<Value>> args = {
459
            env->process_object(),
460
66
            env->native_module_require()};
461
17
        return ExecuteBootstrapper(env, name.c_str(), &params, &args);
462
17
      });
463
}
464
465
5
Environment* GetCurrentEnvironment(Local<Context> context) {
466
5
  return Environment::GetCurrent(context);
467
}
468
469
1
IsolateData* GetEnvironmentIsolateData(Environment* env) {
470
1
  return env->isolate_data();
471
}
472
473
1
ArrayBufferAllocator* GetArrayBufferAllocator(IsolateData* isolate_data) {
474
1
  return isolate_data->node_allocator();
475
}
476
477
6221
MultiIsolatePlatform* GetMultiIsolatePlatform(Environment* env) {
478
6221
  return GetMultiIsolatePlatform(env->isolate_data());
479
}
480
481
6221
MultiIsolatePlatform* GetMultiIsolatePlatform(IsolateData* env) {
482
6221
  return env->platform();
483
}
484
485
MultiIsolatePlatform* CreatePlatform(
486
    int thread_pool_size,
487
    node::tracing::TracingController* tracing_controller) {
488
  return CreatePlatform(
489
      thread_pool_size,
490
      static_cast<v8::TracingController*>(tracing_controller));
491
}
492
493
MultiIsolatePlatform* CreatePlatform(
494
    int thread_pool_size,
495
    v8::TracingController* tracing_controller) {
496
  return MultiIsolatePlatform::Create(thread_pool_size,
497
                                      tracing_controller)
498
      .release();
499
}
500
501
void FreePlatform(MultiIsolatePlatform* platform) {
502
  delete platform;
503
}
504
505
7
std::unique_ptr<MultiIsolatePlatform> MultiIsolatePlatform::Create(
506
    int thread_pool_size,
507
    v8::TracingController* tracing_controller,
508
    v8::PageAllocator* page_allocator) {
509
14
  return std::make_unique<NodePlatform>(thread_pool_size,
510
                                        tracing_controller,
511
7
                                        page_allocator);
512
}
513
514
40067
MaybeLocal<Object> GetPerContextExports(Local<Context> context) {
515
40067
  Isolate* isolate = context->GetIsolate();
516
40067
  EscapableHandleScope handle_scope(isolate);
517
518
40067
  Local<Object> global = context->Global();
519
  Local<Private> key = Private::ForApi(isolate,
520
40067
      FIXED_ONE_BYTE_STRING(isolate, "node:per_context_binding_exports"));
521
522
  Local<Value> existing_value;
523
80134
  if (!global->GetPrivate(context, key).ToLocal(&existing_value))
524
    return MaybeLocal<Object>();
525
40067
  if (existing_value->IsObject())
526
39999
    return handle_scope.Escape(existing_value.As<Object>());
527
528
68
  Local<Object> exports = Object::New(isolate);
529
272
  if (context->Global()->SetPrivate(context, key, exports).IsNothing() ||
530

204
      InitializePrimordials(context).IsNothing())
531
    return MaybeLocal<Object>();
532
68
  return handle_scope.Escape(exports);
533
}
534
535
// Any initialization logic should be performed in
536
// InitializeContext, because embedders don't necessarily
537
// call NewContext and so they will experience breakages.
538
62
Local<Context> NewContext(Isolate* isolate,
539
                          Local<ObjectTemplate> object_template) {
540
124
  auto context = Context::New(isolate, nullptr, object_template);
541
62
  if (context.IsEmpty()) return context;
542
543
124
  if (InitializeContext(context).IsNothing()) {
544
    return Local<Context>();
545
  }
546
547
62
  return context;
548
}
549
550
8
void ProtoThrower(const FunctionCallbackInfo<Value>& info) {
551
8
  THROW_ERR_PROTO_ACCESS(info.GetIsolate());
552
8
}
553
554
// This runs at runtime, regardless of whether the context
555
// is created from a snapshot.
556
7192
Maybe<bool> InitializeContextRuntime(Local<Context> context) {
557
7192
  Isolate* isolate = context->GetIsolate();
558
14384
  HandleScope handle_scope(isolate);
559
560
  // Delete `Intl.v8BreakIterator`
561
  // https://github.com/nodejs/node/issues/14909
562
  {
563
    Local<String> intl_string =
564
7192
      FIXED_ONE_BYTE_STRING(isolate, "Intl");
565
    Local<String> break_iter_string =
566
7192
      FIXED_ONE_BYTE_STRING(isolate, "v8BreakIterator");
567
568
    Local<Value> intl_v;
569
7192
    if (!context->Global()
570
7192
        ->Get(context, intl_string)
571
7192
        .ToLocal(&intl_v)) {
572
      return Nothing<bool>();
573
    }
574
575
14384
    if (intl_v->IsObject() &&
576
7192
        intl_v.As<Object>()
577
14384
          ->Delete(context, break_iter_string)
578
7192
          .IsNothing()) {
579
      return Nothing<bool>();
580
    }
581
  }
582
583
  // Delete `Atomics.wake`
584
  // https://github.com/nodejs/node/issues/21219
585
  {
586
    Local<String> atomics_string =
587
7192
      FIXED_ONE_BYTE_STRING(isolate, "Atomics");
588
    Local<String> wake_string =
589
7192
      FIXED_ONE_BYTE_STRING(isolate, "wake");
590
591
    Local<Value> atomics_v;
592
7192
    if (!context->Global()
593
7192
        ->Get(context, atomics_string)
594
7192
        .ToLocal(&atomics_v)) {
595
      return Nothing<bool>();
596
    }
597
598
14372
    if (atomics_v->IsObject() &&
599
7180
        atomics_v.As<Object>()
600
14372
          ->Delete(context, wake_string)
601
7180
          .IsNothing()) {
602
      return Nothing<bool>();
603
    }
604
  }
605
606
  // Remove __proto__
607
  // https://github.com/nodejs/node/issues/31951
608
  Local<Object> prototype;
609
  {
610
    Local<String> object_string =
611
7192
      FIXED_ONE_BYTE_STRING(isolate, "Object");
612
    Local<String> prototype_string =
613
7192
      FIXED_ONE_BYTE_STRING(isolate, "prototype");
614
615
    Local<Value> object_v;
616
7192
    if (!context->Global()
617
7192
        ->Get(context, object_string)
618
7192
        .ToLocal(&object_v)) {
619
      return Nothing<bool>();
620
    }
621
622
    Local<Value> prototype_v;
623
7192
    if (!object_v.As<Object>()
624
7192
        ->Get(context, prototype_string)
625
7192
        .ToLocal(&prototype_v)) {
626
      return Nothing<bool>();
627
    }
628
629
7192
    prototype = prototype_v.As<Object>();
630
  }
631
632
  Local<String> proto_string =
633
7192
    FIXED_ONE_BYTE_STRING(isolate, "__proto__");
634
635
7192
  if (per_process::cli_options->disable_proto == "delete") {
636
4
    if (prototype
637
4
        ->Delete(context, proto_string)
638
4
        .IsNothing()) {
639
      return Nothing<bool>();
640
    }
641
7188
  } else if (per_process::cli_options->disable_proto == "throw") {
642
    Local<Value> thrower;
643
4
    if (!Function::New(context, ProtoThrower)
644
4
        .ToLocal(&thrower)) {
645
      return Nothing<bool>();
646
    }
647
648
4
    PropertyDescriptor descriptor(thrower, thrower);
649
4
    descriptor.set_enumerable(false);
650
4
    descriptor.set_configurable(true);
651
4
    if (prototype
652
4
        ->DefineProperty(context, proto_string, descriptor)
653
4
        .IsNothing()) {
654
      return Nothing<bool>();
655
    }
656
7184
  } else if (per_process::cli_options->disable_proto != "") {
657
    // Validated in ProcessGlobalArgs
658
    FatalError("InitializeContextRuntime()",
659
               "invalid --disable-proto mode");
660
  }
661
662
7192
  return Just(true);
663
}
664
665
63
Maybe<bool> InitializeContextForSnapshot(Local<Context> context) {
666
63
  Isolate* isolate = context->GetIsolate();
667
126
  HandleScope handle_scope(isolate);
668
669
63
  context->AllowCodeGenerationFromStrings(false);
670
126
  context->SetEmbedderData(
671
      ContextEmbedderIndex::kAllowCodeGenerationFromStrings, True(isolate));
672
126
  context->SetEmbedderData(ContextEmbedderIndex::kAllowWasmCodeGeneration,
673
                           True(isolate));
674
675
63
  return InitializePrimordials(context);
676
}
677
678
131
Maybe<bool> InitializePrimordials(Local<Context> context) {
679
  // Run per-context JS files.
680
131
  Isolate* isolate = context->GetIsolate();
681
131
  Context::Scope context_scope(context);
682
  Local<Object> exports;
683
684
  Local<String> primordials_string =
685
131
      FIXED_ONE_BYTE_STRING(isolate, "primordials");
686
131
  Local<String> global_string = FIXED_ONE_BYTE_STRING(isolate, "global");
687
131
  Local<String> exports_string = FIXED_ONE_BYTE_STRING(isolate, "exports");
688
689
  // Create primordials first and make it available to per-context scripts.
690
131
  Local<Object> primordials = Object::New(isolate);
691
262
  if (primordials->SetPrototype(context, Null(isolate)).IsNothing() ||
692

393
      !GetPerContextExports(context).ToLocal(&exports) ||
693

393
      exports->Set(context, primordials_string, primordials).IsNothing()) {
694
    return Nothing<bool>();
695
  }
696
697
  static const char* context_files[] = {"internal/per_context/primordials",
698
                                        "internal/per_context/domexception",
699
                                        "internal/per_context/messageport",
700
                                        nullptr};
701
702
524
  for (const char** module = context_files; *module != nullptr; module++) {
703
    std::vector<Local<String>> parameters = {
704
393
        global_string, exports_string, primordials_string};
705
786
    Local<Value> arguments[] = {context->Global(), exports, primordials};
706
    MaybeLocal<Function> maybe_fn =
707
        native_module::NativeModuleLoader::LookupAndCompile(
708
393
            context, *module, &parameters, nullptr);
709
    Local<Function> fn;
710
393
    if (!maybe_fn.ToLocal(&fn)) {
711
      return Nothing<bool>();
712
    }
713
    MaybeLocal<Value> result =
714
786
        fn->Call(context, Undefined(isolate), arraysize(arguments), arguments);
715
    // Execution failed during context creation.
716
393
    if (result.IsEmpty()) {
717
      return Nothing<bool>();
718
    }
719
  }
720
721
131
  return Just(true);
722
}
723
724
63
Maybe<bool> InitializeContext(Local<Context> context) {
725
126
  if (InitializeContextForSnapshot(context).IsNothing()) {
726
    return Nothing<bool>();
727
  }
728
729
63
  return InitializeContextRuntime(context);
730
}
731
732
10
uv_loop_t* GetCurrentEventLoop(Isolate* isolate) {
733
20
  HandleScope handle_scope(isolate);
734
10
  Local<Context> context = isolate->GetCurrentContext();
735
10
  if (context.IsEmpty()) return nullptr;
736
10
  Environment* env = Environment::GetCurrent(context);
737
10
  if (env == nullptr) return nullptr;
738
10
  return env->event_loop();
739
}
740
741
9
void AddLinkedBinding(Environment* env, const node_module& mod) {
742
9
  CHECK_NOT_NULL(env);
743
18
  Mutex::ScopedLock lock(env->extra_linked_bindings_mutex());
744
745
9
  node_module* prev_tail = env->extra_linked_bindings_tail();
746
9
  env->extra_linked_bindings()->push_back(mod);
747
9
  if (prev_tail != nullptr)
748
5
    prev_tail->nm_link = &env->extra_linked_bindings()->back();
749
9
}
750
751
3
void AddLinkedBinding(Environment* env, const napi_module& mod) {
752
3
  AddLinkedBinding(env, napi_module_to_node_module(&mod));
753
3
}
754
755
6
void AddLinkedBinding(Environment* env,
756
                      const char* name,
757
                      addon_context_register_func fn,
758
                      void* priv) {
759
6
  node_module mod = {
760
    NODE_MODULE_VERSION,
761
    NM_F_LINKED,
762
    nullptr,  // nm_dso_handle
763
    nullptr,  // nm_filename
764
    nullptr,  // nm_register_func
765
    fn,
766
    name,
767
    priv,
768
    nullptr   // nm_link
769
6
  };
770
6
  AddLinkedBinding(env, mod);
771
6
}
772
773
static std::atomic<uint64_t> next_thread_id{0};
774
775
6797
ThreadId AllocateEnvironmentThreadId() {
776
6797
  return ThreadId { next_thread_id++ };
777
}
778
779
516
void DefaultProcessExitHandler(Environment* env, int exit_code) {
780
516
  env->set_can_call_into_js(false);
781
516
  env->stop_sub_worker_contexts();
782
516
  DisposePlatform();
783
516
  uv_library_shutdown();
784
516
  exit(exit_code);
785
}
786
787
788
1248
void SetProcessExitHandler(Environment* env,
789
                           std::function<void(Environment*, int)>&& handler) {
790
1248
  env->set_process_exit_handler(std::move(handler));
791
1248
}
792
793
}  // namespace node