GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: stream_base.cc Lines: 325 348 93.4 %
Date: 2022-09-19 04:21:54 Branches: 149 212 70.3 %

Line Branch Exec Source
1
#include "stream_base.h"  // NOLINT(build/include_inline)
2
#include "stream_base-inl.h"
3
#include "stream_wrap.h"
4
5
#include "env-inl.h"
6
#include "js_stream.h"
7
#include "node.h"
8
#include "node_buffer.h"
9
#include "node_errors.h"
10
#include "node_external_reference.h"
11
#include "string_bytes.h"
12
#include "util-inl.h"
13
#include "v8.h"
14
15
#include <climits>  // INT_MAX
16
17
namespace node {
18
19
using v8::Array;
20
using v8::ArrayBuffer;
21
using v8::BackingStore;
22
using v8::ConstructorBehavior;
23
using v8::Context;
24
using v8::DontDelete;
25
using v8::DontEnum;
26
using v8::External;
27
using v8::Function;
28
using v8::FunctionCallbackInfo;
29
using v8::FunctionTemplate;
30
using v8::HandleScope;
31
using v8::Integer;
32
using v8::Isolate;
33
using v8::Local;
34
using v8::MaybeLocal;
35
using v8::Object;
36
using v8::PropertyAttribute;
37
using v8::ReadOnly;
38
using v8::SideEffectType;
39
using v8::Signature;
40
using v8::String;
41
using v8::Value;
42
43
template int StreamBase::WriteString<ASCII>(
44
    const FunctionCallbackInfo<Value>& args);
45
template int StreamBase::WriteString<UTF8>(
46
    const FunctionCallbackInfo<Value>& args);
47
template int StreamBase::WriteString<UCS2>(
48
    const FunctionCallbackInfo<Value>& args);
49
template int StreamBase::WriteString<LATIN1>(
50
    const FunctionCallbackInfo<Value>& args);
51
52
53
54964
int StreamBase::ReadStartJS(const FunctionCallbackInfo<Value>& args) {
54
54964
  return ReadStart();
55
}
56
57
58
13376
int StreamBase::ReadStopJS(const FunctionCallbackInfo<Value>& args) {
59
13376
  return ReadStop();
60
}
61
62
12
int StreamBase::UseUserBuffer(const FunctionCallbackInfo<Value>& args) {
63
12
  CHECK(Buffer::HasInstance(args[0]));
64
65
24
  uv_buf_t buf = uv_buf_init(Buffer::Data(args[0]), Buffer::Length(args[0]));
66
12
  PushStreamListener(new CustomBufferJSListener(buf));
67
12
  return 0;
68
}
69
70
31463
int StreamBase::Shutdown(const FunctionCallbackInfo<Value>& args) {
71
31463
  CHECK(args[0]->IsObject());
72
31463
  Local<Object> req_wrap_obj = args[0].As<Object>();
73
74
31463
  return Shutdown(req_wrap_obj);
75
}
76
77
89627
void StreamBase::SetWriteResult(const StreamWriteResult& res) {
78
89627
  env_->stream_base_state()[kBytesWritten] = res.bytes;
79
89627
  env_->stream_base_state()[kLastWriteWasAsync] = res.async;
80
89627
}
81
82
13678
int StreamBase::Writev(const FunctionCallbackInfo<Value>& args) {
83
13678
  Environment* env = Environment::GetCurrent(args);
84
13678
  Isolate* isolate = env->isolate();
85
13678
  Local<Context> context = env->context();
86
87
13678
  CHECK(args[0]->IsObject());
88
13678
  CHECK(args[1]->IsArray());
89
90
27356
  Local<Object> req_wrap_obj = args[0].As<Object>();
91
27356
  Local<Array> chunks = args[1].As<Array>();
92
13678
  bool all_buffers = args[2]->IsTrue();
93
94
  size_t count;
95
13678
  if (all_buffers)
96
319
    count = chunks->Length();
97
  else
98
13359
    count = chunks->Length() >> 1;
99
100
27356
  MaybeStackBuffer<uv_buf_t, 16> bufs(count);
101
102
13678
  size_t storage_size = 0;
103
  size_t offset;
104
105
13678
  if (!all_buffers) {
106
    // Determine storage size first
107
89154
    for (size_t i = 0; i < count; i++) {
108
      Local<Value> chunk;
109
151590
      if (!chunks->Get(context, i * 2).ToLocal(&chunk))
110
        return -1;
111
112
75795
      if (Buffer::HasInstance(chunk))
113
33216
        continue;
114
        // Buffer chunk, no additional storage required
115
116
      // String chunk
117
      Local<String> string;
118
85158
      if (!chunk->ToString(context).ToLocal(&string))
119
        return -1;
120
      Local<Value> next_chunk;
121
85158
      if (!chunks->Get(context, i * 2 + 1).ToLocal(&next_chunk))
122
        return -1;
123
42579
      enum encoding encoding = ParseEncoding(isolate, next_chunk);
124
      size_t chunk_size;
125
8286
      if ((encoding == UTF8 &&
126
8286
             string->Length() > 65535 &&
127

85186
             !StringBytes::Size(isolate, string, encoding).To(&chunk_size)) ||
128
85158
              !StringBytes::StorageSize(isolate, string, encoding)
129
42579
                  .To(&chunk_size)) {
130
        return -1;
131
      }
132
42579
      storage_size += chunk_size;
133
    }
134
135
13359
    if (storage_size > INT_MAX)
136
      return UV_ENOBUFS;
137
  } else {
138
27295
    for (size_t i = 0; i < count; i++) {
139
      Local<Value> chunk;
140
53952
      if (!chunks->Get(context, i).ToLocal(&chunk))
141
        return -1;
142
26976
      bufs[i].base = Buffer::Data(chunk);
143
26976
      bufs[i].len = Buffer::Length(chunk);
144
    }
145
  }
146
147
13678
  std::unique_ptr<BackingStore> bs;
148
13678
  if (storage_size > 0) {
149
13313
    NoArrayBufferZeroFillScope no_zero_fill_scope(env->isolate_data());
150
13313
    bs = ArrayBuffer::NewBackingStore(isolate, storage_size);
151
  }
152
153
13678
  offset = 0;
154
13678
  if (!all_buffers) {
155
89154
    for (size_t i = 0; i < count; i++) {
156
      Local<Value> chunk;
157
151590
      if (!chunks->Get(context, i * 2).ToLocal(&chunk))
158
        return -1;
159
160
      // Write buffer
161
75795
      if (Buffer::HasInstance(chunk)) {
162
33216
        bufs[i].base = Buffer::Data(chunk);
163
33216
        bufs[i].len = Buffer::Length(chunk);
164
33216
        continue;
165
      }
166
167
      // Write string
168
42579
      CHECK_LE(offset, storage_size);
169
      char* str_storage =
170
42579
          static_cast<char*>(bs ? bs->Data() : nullptr) + offset;
171
42579
      size_t str_size = (bs ? bs->ByteLength() : 0) - offset;
172
173
      Local<String> string;
174
85158
      if (!chunk->ToString(context).ToLocal(&string))
175
        return -1;
176
      Local<Value> next_chunk;
177
85158
      if (!chunks->Get(context, i * 2 + 1).ToLocal(&next_chunk))
178
        return -1;
179
42579
      enum encoding encoding = ParseEncoding(isolate, next_chunk);
180
42579
      str_size = StringBytes::Write(isolate,
181
                                    str_storage,
182
                                    str_size,
183
                                    string,
184
                                    encoding);
185
42579
      bufs[i].base = str_storage;
186
42579
      bufs[i].len = str_size;
187
42579
      offset += str_size;
188
    }
189
  }
190
191
13678
  StreamWriteResult res = Write(*bufs, count, nullptr, req_wrap_obj);
192
13678
  SetWriteResult(res);
193

13678
  if (res.wrap != nullptr && storage_size > 0)
194
348
    res.wrap->SetBackingStore(std::move(bs));
195
13678
  return res.err;
196
}
197
198
199
46481
int StreamBase::WriteBuffer(const FunctionCallbackInfo<Value>& args) {
200
46481
  CHECK(args[0]->IsObject());
201
202
46481
  Environment* env = Environment::GetCurrent(args);
203
204
46481
  if (!args[1]->IsUint8Array()) {
205
1
    node::THROW_ERR_INVALID_ARG_TYPE(env, "Second argument must be a buffer");
206
1
    return 0;
207
  }
208
209
92960
  Local<Object> req_wrap_obj = args[0].As<Object>();
210
  uv_buf_t buf;
211
46480
  buf.base = Buffer::Data(args[1]);
212
46480
  buf.len = Buffer::Length(args[1]);
213
214
46480
  uv_stream_t* send_handle = nullptr;
215
216

46480
  if (args[2]->IsObject() && IsIPCPipe()) {
217
    Local<Object> send_handle_obj = args[2].As<Object>();
218
219
    HandleWrap* wrap;
220
    ASSIGN_OR_RETURN_UNWRAP(&wrap, send_handle_obj, UV_EINVAL);
221
    send_handle = reinterpret_cast<uv_stream_t*>(wrap->GetHandle());
222
    // Reference LibuvStreamWrap instance to prevent it from being garbage
223
    // collected before `AfterWrite` is called.
224
    if (req_wrap_obj->Set(env->context(),
225
                          env->handle_string(),
226
                          send_handle_obj).IsNothing()) {
227
      return -1;
228
    }
229
  }
230
231
46480
  StreamWriteResult res = Write(&buf, 1, send_handle, req_wrap_obj);
232
46480
  SetWriteResult(res);
233
234
46480
  return res.err;
235
}
236
237
238
template <enum encoding enc>
239
58938
int StreamBase::WriteString(const FunctionCallbackInfo<Value>& args) {
240
58938
  Environment* env = Environment::GetCurrent(args);
241
58938
  Isolate* isolate = env->isolate();
242
58938
  CHECK(args[0]->IsObject());
243
117876
  CHECK(args[1]->IsString());
244
245
117876
  Local<Object> req_wrap_obj = args[0].As<Object>();
246
117876
  Local<String> string = args[1].As<String>();
247
  Local<Object> send_handle_obj;
248
58938
  if (args[2]->IsObject())
249
580
    send_handle_obj = args[2].As<Object>();
250
251
  // Compute the size of the storage that the string will be flattened into.
252
  // For UTF8 strings that are very long, go ahead and take the hit for
253
  // computing their actual size, rather than tripling the storage.
254
  size_t storage_size;
255
58938
  if ((enc == UTF8 &&
256
52180
         string->Length() > 65535 &&
257

111402
         !StringBytes::Size(isolate, string, enc).To(&storage_size)) ||
258

170056
          !StringBytes::StorageSize(isolate, string, enc).To(&storage_size)) {
259
    return -1;
260
  }
261
262
58938
  if (storage_size > INT_MAX)
263
    return UV_ENOBUFS;
264
265
  // Try writing immediately if write size isn't too big
266
  char stack_storage[16384];  // 16kb
267
  size_t data_size;
268
58938
  size_t synchronously_written = 0;
269
  uv_buf_t buf;
270
271
115662
  bool try_write = storage_size <= sizeof(stack_storage) &&
272

67882
                   (!IsIPCPipe() || send_handle_obj.IsEmpty());
273
58938
  if (try_write) {
274
56438
    data_size = StringBytes::Write(isolate,
275
                                   stack_storage,
276
                                   storage_size,
277
                                   string,
278
                                   enc);
279
56438
    buf = uv_buf_init(stack_storage, data_size);
280
281
56438
    uv_buf_t* bufs = &buf;
282
56438
    size_t count = 1;
283
56438
    const int err = DoTryWrite(&bufs, &count);
284
    // Keep track of the bytes written here, because we're taking a shortcut
285
    // by using `DoTryWrite()` directly instead of using the utilities
286
    // provided by `Write()`.
287
56438
    synchronously_written = count == 0 ? data_size : data_size - buf.len;
288
56438
    bytes_written_ += synchronously_written;
289
290
    // Immediate failure or success
291

56438
    if (err != 0 || count == 0) {
292
52738
      SetWriteResult(StreamWriteResult { false, err, nullptr, data_size, {} });
293
52738
      return err;
294
    }
295
296
    // Partial write
297
3700
    CHECK_EQ(count, 1);
298
  }
299
300
6200
  std::unique_ptr<BackingStore> bs;
301
302
6200
  if (try_write) {
303
    // Copy partial data
304
3700
    NoArrayBufferZeroFillScope no_zero_fill_scope(env->isolate_data());
305
3700
    bs = ArrayBuffer::NewBackingStore(isolate, buf.len);
306
3700
    memcpy(static_cast<char*>(bs->Data()), buf.base, buf.len);
307
3700
    data_size = buf.len;
308
  } else {
309
    // Write it
310
2500
    NoArrayBufferZeroFillScope no_zero_fill_scope(env->isolate_data());
311
2500
    bs = ArrayBuffer::NewBackingStore(isolate, storage_size);
312
2500
    data_size = StringBytes::Write(isolate,
313
2500
                                   static_cast<char*>(bs->Data()),
314
                                   storage_size,
315
                                   string,
316
                                   enc);
317
  }
318
319
6200
  CHECK_LE(data_size, storage_size);
320
321
6200
  buf = uv_buf_init(static_cast<char*>(bs->Data()), data_size);
322
323
6200
  uv_stream_t* send_handle = nullptr;
324
325

6494
  if (IsIPCPipe() && !send_handle_obj.IsEmpty()) {
326
    HandleWrap* wrap;
327
290
    ASSIGN_OR_RETURN_UNWRAP(&wrap, send_handle_obj, UV_EINVAL);
328
290
    send_handle = reinterpret_cast<uv_stream_t*>(wrap->GetHandle());
329
    // Reference LibuvStreamWrap instance to prevent it from being garbage
330
    // collected before `AfterWrite` is called.
331
580
    if (req_wrap_obj->Set(env->context(),
332
                          env->handle_string(),
333
290
                          send_handle_obj).IsNothing()) {
334
      return -1;
335
    }
336
  }
337
338
6200
  StreamWriteResult res = Write(&buf, 1, send_handle, req_wrap_obj);
339
6200
  res.bytes += synchronously_written;
340
341
6200
  SetWriteResult(res);
342
6200
  if (res.wrap != nullptr)
343
6148
    res.wrap->SetBackingStore(std::move(bs));
344
345
6200
  return res.err;
346
}
347
348
349
65653
MaybeLocal<Value> StreamBase::CallJSOnreadMethod(ssize_t nread,
350
                                                 Local<ArrayBuffer> ab,
351
                                                 size_t offset,
352
                                                 StreamBaseJSChecks checks) {
353
65653
  Environment* env = env_;
354
355
  DCHECK_EQ(static_cast<int32_t>(nread), nread);
356
  DCHECK_LE(offset, INT32_MAX);
357
358
65653
  if (checks == DONT_SKIP_NREAD_CHECKS) {
359
63563
    if (ab.IsEmpty()) {
360
      DCHECK_EQ(offset, 0);
361
      DCHECK_LE(nread, 0);
362
    } else {
363
      DCHECK_GE(nread, 0);
364
    }
365
  }
366
367
65653
  env->stream_base_state()[kReadBytesOrError] = static_cast<int32_t>(nread);
368
65653
  env->stream_base_state()[kArrayBufferOffset] = offset;
369
370
  Local<Value> argv[] = {
371
108765
    ab.IsEmpty() ? Undefined(env->isolate()).As<Value>() : ab.As<Value>()
372
65653
  };
373
374
65653
  AsyncWrap* wrap = GetAsyncWrap();
375
65653
  CHECK_NOT_NULL(wrap);
376
65653
  Local<Value> onread = wrap->object()->GetInternalField(
377
131306
      StreamBase::kOnReadFunctionField);
378
65653
  CHECK(onread->IsFunction());
379
131306
  return wrap->MakeCallback(onread.As<Function>(), arraysize(argv), argv);
380
}
381
382
383
3643
bool StreamBase::IsIPCPipe() {
384
3643
  return false;
385
}
386
387
388
int StreamBase::GetFD() {
389
  return -1;
390
}
391
392
393
51257
Local<Object> StreamBase::GetObject() {
394
51257
  return GetAsyncWrap()->object();
395
}
396
397
34172
void StreamBase::AddMethod(Environment* env,
398
                           Local<Signature> signature,
399
                           enum PropertyAttribute attributes,
400
                           Local<FunctionTemplate> t,
401
                           JSMethodFunction* stream_method,
402
                           Local<String> string) {
403
34172
  Isolate* isolate = env->isolate();
404
  Local<FunctionTemplate> templ =
405
      NewFunctionTemplate(isolate,
406
                          stream_method,
407
                          signature,
408
                          ConstructorBehavior::kThrow,
409
34172
                          SideEffectType::kHasNoSideEffect);
410
68344
  t->PrototypeTemplate()->SetAccessorProperty(
411
      string, templ, Local<FunctionTemplate>(), attributes);
412
34172
}
413
414
8543
void StreamBase::AddMethods(Environment* env, Local<FunctionTemplate> t) {
415
8543
  Isolate* isolate = env->isolate();
416
8543
  HandleScope scope(isolate);
417
418
8543
  enum PropertyAttribute attributes =
419
      static_cast<PropertyAttribute>(ReadOnly | DontDelete | DontEnum);
420
8543
  Local<Signature> sig = Signature::New(isolate, t);
421
422
8543
  AddMethod(env, sig, attributes, t, GetFD, env->fd_string());
423
8543
  AddMethod(
424
      env, sig, attributes, t, GetExternal, env->external_stream_string());
425
8543
  AddMethod(env, sig, attributes, t, GetBytesRead, env->bytes_read_string());
426
8543
  AddMethod(
427
      env, sig, attributes, t, GetBytesWritten, env->bytes_written_string());
428
8543
  SetProtoMethod(isolate, t, "readStart", JSMethod<&StreamBase::ReadStartJS>);
429
8543
  SetProtoMethod(isolate, t, "readStop", JSMethod<&StreamBase::ReadStopJS>);
430
8543
  SetProtoMethod(isolate, t, "shutdown", JSMethod<&StreamBase::Shutdown>);
431
8543
  SetProtoMethod(
432
      isolate, t, "useUserBuffer", JSMethod<&StreamBase::UseUserBuffer>);
433
8543
  SetProtoMethod(isolate, t, "writev", JSMethod<&StreamBase::Writev>);
434
8543
  SetProtoMethod(isolate, t, "writeBuffer", JSMethod<&StreamBase::WriteBuffer>);
435
8543
  SetProtoMethod(isolate,
436
                 t,
437
                 "writeAsciiString",
438
                 JSMethod<&StreamBase::WriteString<ASCII>>);
439
8543
  SetProtoMethod(
440
      isolate, t, "writeUtf8String", JSMethod<&StreamBase::WriteString<UTF8>>);
441
8543
  SetProtoMethod(
442
      isolate, t, "writeUcs2String", JSMethod<&StreamBase::WriteString<UCS2>>);
443
8543
  SetProtoMethod(isolate,
444
                 t,
445
                 "writeLatin1String",
446
                 JSMethod<&StreamBase::WriteString<LATIN1>>);
447
34172
  t->PrototypeTemplate()->Set(FIXED_ONE_BYTE_STRING(isolate, "isStreamBase"),
448
                              True(isolate));
449
25629
  t->PrototypeTemplate()->SetAccessor(
450
      FIXED_ONE_BYTE_STRING(isolate, "onread"),
451
      BaseObject::InternalFieldGet<StreamBase::kOnReadFunctionField>,
452
      BaseObject::InternalFieldSet<StreamBase::kOnReadFunctionField,
453
                                   &Value::IsFunction>);
454
8543
}
455
456
11056
void StreamBase::RegisterExternalReferences(
457
    ExternalReferenceRegistry* registry) {
458
  // This function is called by a single thread during start up, so it is safe
459
  // to use a local static variable here.
460
  static bool is_registered = false;
461
11056
  if (is_registered) return;
462
5528
  registry->Register(GetFD);
463
5528
  registry->Register(GetExternal);
464
5528
  registry->Register(GetBytesRead);
465
5528
  registry->Register(GetBytesWritten);
466
5528
  registry->Register(JSMethod<&StreamBase::ReadStartJS>);
467
5528
  registry->Register(JSMethod<&StreamBase::ReadStopJS>);
468
5528
  registry->Register(JSMethod<&StreamBase::Shutdown>);
469
5528
  registry->Register(JSMethod<&StreamBase::UseUserBuffer>);
470
5528
  registry->Register(JSMethod<&StreamBase::Writev>);
471
5528
  registry->Register(JSMethod<&StreamBase::WriteBuffer>);
472
5528
  registry->Register(JSMethod<&StreamBase::WriteString<ASCII>>);
473
5528
  registry->Register(JSMethod<&StreamBase::WriteString<UTF8>>);
474
5528
  registry->Register(JSMethod<&StreamBase::WriteString<UCS2>>);
475
5528
  registry->Register(JSMethod<&StreamBase::WriteString<LATIN1>>);
476
5528
  registry->Register(
477
      BaseObject::InternalFieldGet<StreamBase::kOnReadFunctionField>);
478
5528
  registry->Register(
479
      BaseObject::InternalFieldSet<StreamBase::kOnReadFunctionField,
480
                                   &Value::IsFunction>);
481
5528
  is_registered = true;
482
}
483
484
1509
void StreamBase::GetFD(const FunctionCallbackInfo<Value>& args) {
485
  // Mimic implementation of StreamBase::GetFD() and UDPWrap::GetFD().
486
3018
  StreamBase* wrap = StreamBase::FromObject(args.This().As<Object>());
487
1509
  if (wrap == nullptr) return args.GetReturnValue().Set(UV_EINVAL);
488
489
1509
  if (!wrap->IsAlive()) return args.GetReturnValue().Set(UV_EINVAL);
490
491
3018
  args.GetReturnValue().Set(wrap->GetFD());
492
}
493
494
35621
void StreamBase::GetBytesRead(const FunctionCallbackInfo<Value>& args) {
495
71242
  StreamBase* wrap = StreamBase::FromObject(args.This().As<Object>());
496
35623
  if (wrap == nullptr) return args.GetReturnValue().Set(0);
497
498
  // uint64_t -> double. 53bits is enough for all real cases.
499
71240
  args.GetReturnValue().Set(static_cast<double>(wrap->bytes_read_));
500
}
501
502
35659
void StreamBase::GetBytesWritten(const FunctionCallbackInfo<Value>& args) {
503
71318
  StreamBase* wrap = StreamBase::FromObject(args.This().As<Object>());
504
35659
  if (wrap == nullptr) return args.GetReturnValue().Set(0);
505
506
  // uint64_t -> double. 53bits is enough for all real cases.
507
71318
  args.GetReturnValue().Set(static_cast<double>(wrap->bytes_written_));
508
}
509
510
2
void StreamBase::GetExternal(const FunctionCallbackInfo<Value>& args) {
511
4
  StreamBase* wrap = StreamBase::FromObject(args.This().As<Object>());
512
2
  if (wrap == nullptr) return;
513
514
2
  Local<External> ext = External::New(args.GetIsolate(), wrap);
515
4
  args.GetReturnValue().Set(ext);
516
}
517
518
template <int (StreamBase::*Method)(const FunctionCallbackInfo<Value>& args)>
519
378890
void StreamBase::JSMethod(const FunctionCallbackInfo<Value>& args) {
520
757780
  StreamBase* wrap = StreamBase::FromObject(args.Holder().As<Object>());
521
378894
  if (wrap == nullptr) return;
522
523
378898
  if (!wrap->IsAlive()) return args.GetReturnValue().Set(UV_EINVAL);
524
525
378886
  AsyncHooks::DefaultTriggerAsyncIdScope trigger_scope(wrap->GetAsyncWrap());
526
757772
  args.GetReturnValue().Set((wrap->*Method)(args));
527
}
528
529
9569
int StreamResource::DoTryWrite(uv_buf_t** bufs, size_t* count) {
530
  // No TryWrite by default
531
9569
  return 0;
532
}
533
534
535
47871
const char* StreamResource::Error() const {
536
47871
  return nullptr;
537
}
538
539
540
void StreamResource::ClearError() {
541
  // No-op
542
}
543
544
545
34809
uv_buf_t EmitToJSStreamListener::OnStreamAlloc(size_t suggested_size) {
546
34809
  CHECK_NOT_NULL(stream_);
547
34809
  Environment* env = static_cast<StreamBase*>(stream_)->stream_env();
548
34809
  return env->allocate_managed_buffer(suggested_size);
549
}
550
551
49750
void EmitToJSStreamListener::OnStreamRead(ssize_t nread, const uv_buf_t& buf_) {
552
49750
  CHECK_NOT_NULL(stream_);
553
49750
  StreamBase* stream = static_cast<StreamBase*>(stream_);
554
49750
  Environment* env = stream->stream_env();
555
49750
  Isolate* isolate = env->isolate();
556
49750
  HandleScope handle_scope(isolate);
557
49750
  Context::Scope context_scope(env->context());
558
49750
  std::unique_ptr<BackingStore> bs = env->release_managed_buffer(buf_);
559
560
49750
  if (nread <= 0)  {
561
19476
    if (nread < 0)
562
19460
      stream->CallJSOnreadMethod(nread, Local<ArrayBuffer>());
563
19417
    return;
564
  }
565
566
30274
  CHECK_LE(static_cast<size_t>(nread), bs->ByteLength());
567
30274
  bs = BackingStore::Reallocate(isolate, std::move(bs), nread);
568
569
30274
  stream->CallJSOnreadMethod(nread, ArrayBuffer::New(isolate, std::move(bs)));
570
}
571
572
573
2090
uv_buf_t CustomBufferJSListener::OnStreamAlloc(size_t suggested_size) {
574
2090
  return buffer_;
575
}
576
577
578
2096
void CustomBufferJSListener::OnStreamRead(ssize_t nread, const uv_buf_t& buf) {
579
2096
  CHECK_NOT_NULL(stream_);
580
581
2096
  StreamBase* stream = static_cast<StreamBase*>(stream_);
582
2096
  Environment* env = stream->stream_env();
583
2096
  HandleScope handle_scope(env->isolate());
584
2096
  Context::Scope context_scope(env->context());
585
586
  // To deal with the case where POLLHUP is received and UV_EOF is returned, as
587
  // libuv returns an empty buffer (on unices only).
588

2096
  if (nread == UV_EOF && buf.base == nullptr) {
589
6
    stream->CallJSOnreadMethod(nread, Local<ArrayBuffer>());
590
6
    return;
591
  }
592
593
2090
  CHECK_EQ(buf.base, buffer_.base);
594
595
  MaybeLocal<Value> ret = stream->CallJSOnreadMethod(nread,
596
                             Local<ArrayBuffer>(),
597
                             0,
598
2090
                             StreamBase::SKIP_NREAD_CHECKS);
599
  Local<Value> next_buf_v;
600

6270
  if (ret.ToLocal(&next_buf_v) && !next_buf_v->IsUndefined()) {
601
24
    buffer_.base = Buffer::Data(next_buf_v);
602
24
    buffer_.len = Buffer::Length(next_buf_v);
603
  }
604
}
605
606
607
13163
void ReportWritesToJSStreamListener::OnStreamAfterReqFinished(
608
    StreamReq* req_wrap, int status) {
609
13163
  StreamBase* stream = static_cast<StreamBase*>(stream_);
610
13163
  Environment* env = stream->stream_env();
611
13163
  if (env->is_stopping()) return;
612
13086
  AsyncWrap* async_wrap = req_wrap->GetAsyncWrap();
613
26171
  HandleScope handle_scope(env->isolate());
614
13086
  Context::Scope context_scope(env->context());
615
13086
  CHECK(!async_wrap->persistent().IsEmpty());
616
13086
  Local<Object> req_wrap_obj = async_wrap->object();
617
618
  Local<Value> argv[] = {
619
    Integer::New(env->isolate(), status),
620
13086
    stream->GetObject(),
621
    Undefined(env->isolate())
622
39258
  };
623
624
13086
  const char* msg = stream->Error();
625
13086
  if (msg != nullptr) {
626
    argv[2] = OneByteString(env->isolate(), msg);
627
    stream->ClearError();
628
  }
629
630
39258
  if (req_wrap_obj->Has(env->context(), env->oncomplete_string()).FromJust())
631
13085
    async_wrap->MakeCallback(env->oncomplete_string(), arraysize(argv), argv);
632
}
633
634
5506
void ReportWritesToJSStreamListener::OnStreamAfterWrite(
635
    WriteWrap* req_wrap, int status) {
636
5506
  OnStreamAfterReqFinished(req_wrap, status);
637
5505
}
638
639
7657
void ReportWritesToJSStreamListener::OnStreamAfterShutdown(
640
    ShutdownWrap* req_wrap, int status) {
641
7657
  OnStreamAfterReqFinished(req_wrap, status);
642
7657
}
643
644
7657
void ShutdownWrap::OnDone(int status) {
645
7657
  stream()->EmitAfterShutdown(this, status);
646
7657
  Dispose();
647
7657
}
648
649
7915
void WriteWrap::OnDone(int status) {
650
7915
  stream()->EmitAfterWrite(this, status);
651
7914
  Dispose();
652
7914
}
653
654
441356
StreamListener::~StreamListener() {
655
220678
  if (stream_ != nullptr)
656
184244
    stream_->RemoveStreamListener(this);
657
}
658
659
2665
void StreamListener::OnStreamAfterShutdown(ShutdownWrap* w, int status) {
660
2665
  CHECK_NOT_NULL(previous_listener_);
661
2665
  previous_listener_->OnStreamAfterShutdown(w, status);
662
2665
}
663
664
4157
void StreamListener::OnStreamAfterWrite(WriteWrap* w, int status) {
665
4157
  CHECK_NOT_NULL(previous_listener_);
666
4157
  previous_listener_->OnStreamAfterWrite(w, status);
667
4157
}
668
669
135288
StreamResource::~StreamResource() {
670
136572
  while (listener_ != nullptr) {
671
1284
    StreamListener* listener = listener_;
672
1284
    listener->OnStreamDestroy();
673
    // Remove the listener if it didn’t remove itself. This makes the logic
674
    // in `OnStreamDestroy()` implementations easier, because they
675
    // may call generic cleanup functions which can just remove the
676
    // listener unconditionally.
677
1284
    if (listener == listener_)
678
1260
      RemoveStreamListener(listener_);
679
  }
680
}
681
682
13
ShutdownWrap* StreamBase::CreateShutdownWrap(
683
    Local<Object> object) {
684
13
  auto* wrap = new SimpleShutdownWrap<AsyncWrap>(this, object);
685
13
  wrap->MakeWeak();
686
13
  return wrap;
687
}
688
689
7719
WriteWrap* StreamBase::CreateWriteWrap(
690
    Local<Object> object) {
691
7719
  auto* wrap = new SimpleWriteWrap<AsyncWrap>(this, object);
692
7719
  wrap->MakeWeak();
693
7719
  return wrap;
694
}
695
696
}  // namespace node