GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: stream_base.cc Lines: 323 346 93.4 %
Date: 2022-06-20 04:16:14 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
55140
int StreamBase::ReadStartJS(const FunctionCallbackInfo<Value>& args) {
54
55140
  return ReadStart();
55
}
56
57
58
13318
int StreamBase::ReadStopJS(const FunctionCallbackInfo<Value>& args) {
59
13318
  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
35570
int StreamBase::Shutdown(const FunctionCallbackInfo<Value>& args) {
71
35570
  CHECK(args[0]->IsObject());
72
35570
  Local<Object> req_wrap_obj = args[0].As<Object>();
73
74
35570
  return Shutdown(req_wrap_obj);
75
}
76
77
89464
void StreamBase::SetWriteResult(const StreamWriteResult& res) {
78
89464
  env_->stream_base_state()[kBytesWritten] = res.bytes;
79
89464
  env_->stream_base_state()[kLastWriteWasAsync] = res.async;
80
89464
}
81
82
13707
int StreamBase::Writev(const FunctionCallbackInfo<Value>& args) {
83
13707
  Environment* env = Environment::GetCurrent(args);
84
13707
  Isolate* isolate = env->isolate();
85
13707
  Local<Context> context = env->context();
86
87
13707
  CHECK(args[0]->IsObject());
88
13707
  CHECK(args[1]->IsArray());
89
90
27414
  Local<Object> req_wrap_obj = args[0].As<Object>();
91
27414
  Local<Array> chunks = args[1].As<Array>();
92
13707
  bool all_buffers = args[2]->IsTrue();
93
94
  size_t count;
95
13707
  if (all_buffers)
96
319
    count = chunks->Length();
97
  else
98
13388
    count = chunks->Length() >> 1;
99
100
27414
  MaybeStackBuffer<uv_buf_t, 16> bufs(count);
101
102
13707
  size_t storage_size = 0;
103
  size_t offset;
104
105
13707
  if (!all_buffers) {
106
    // Determine storage size first
107
89228
    for (size_t i = 0; i < count; i++) {
108
      Local<Value> chunk;
109
151680
      if (!chunks->Get(context, i * 2).ToLocal(&chunk))
110
        return -1;
111
112
75840
      if (Buffer::HasInstance(chunk))
113
33235
        continue;
114
        // Buffer chunk, no additional storage required
115
116
      // String chunk
117
      Local<String> string;
118
85210
      if (!chunk->ToString(context).ToLocal(&string))
119
        return -1;
120
      Local<Value> next_chunk;
121
85210
      if (!chunks->Get(context, i * 2 + 1).ToLocal(&next_chunk))
122
        return -1;
123
42605
      enum encoding encoding = ParseEncoding(isolate, next_chunk);
124
      size_t chunk_size;
125
8239
      if ((encoding == UTF8 &&
126
8239
             string->Length() > 65535 &&
127

85238
             !StringBytes::Size(isolate, string, encoding).To(&chunk_size)) ||
128
85210
              !StringBytes::StorageSize(isolate, string, encoding)
129
42605
                  .To(&chunk_size)) {
130
        return -1;
131
      }
132
42605
      storage_size += chunk_size;
133
    }
134
135
13388
    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
13707
  std::unique_ptr<BackingStore> bs;
148
13707
  if (storage_size > 0) {
149
13342
    NoArrayBufferZeroFillScope no_zero_fill_scope(env->isolate_data());
150
13342
    bs = ArrayBuffer::NewBackingStore(isolate, storage_size);
151
  }
152
153
13707
  offset = 0;
154
13707
  if (!all_buffers) {
155
89228
    for (size_t i = 0; i < count; i++) {
156
      Local<Value> chunk;
157
151680
      if (!chunks->Get(context, i * 2).ToLocal(&chunk))
158
        return -1;
159
160
      // Write buffer
161
75840
      if (Buffer::HasInstance(chunk)) {
162
33235
        bufs[i].base = Buffer::Data(chunk);
163
33235
        bufs[i].len = Buffer::Length(chunk);
164
33235
        continue;
165
      }
166
167
      // Write string
168
42605
      CHECK_LE(offset, storage_size);
169
      char* str_storage =
170
42605
          static_cast<char*>(bs ? bs->Data() : nullptr) + offset;
171
42605
      size_t str_size = (bs ? bs->ByteLength() : 0) - offset;
172
173
      Local<String> string;
174
85210
      if (!chunk->ToString(context).ToLocal(&string))
175
        return -1;
176
      Local<Value> next_chunk;
177
85210
      if (!chunks->Get(context, i * 2 + 1).ToLocal(&next_chunk))
178
        return -1;
179
42605
      enum encoding encoding = ParseEncoding(isolate, next_chunk);
180
42605
      str_size = StringBytes::Write(isolate,
181
                                    str_storage,
182
                                    str_size,
183
                                    string,
184
                                    encoding);
185
42605
      bufs[i].base = str_storage;
186
42605
      bufs[i].len = str_size;
187
42605
      offset += str_size;
188
    }
189
  }
190
191
13707
  StreamWriteResult res = Write(*bufs, count, nullptr, req_wrap_obj);
192
13707
  SetWriteResult(res);
193

13707
  if (res.wrap != nullptr && storage_size > 0)
194
346
    res.wrap->SetBackingStore(std::move(bs));
195
13707
  return res.err;
196
}
197
198
199
46308
int StreamBase::WriteBuffer(const FunctionCallbackInfo<Value>& args) {
200
46308
  CHECK(args[0]->IsObject());
201
202
46308
  Environment* env = Environment::GetCurrent(args);
203
204
46308
  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
92614
  Local<Object> req_wrap_obj = args[0].As<Object>();
210
  uv_buf_t buf;
211
46307
  buf.base = Buffer::Data(args[1]);
212
46307
  buf.len = Buffer::Length(args[1]);
213
214
46307
  uv_stream_t* send_handle = nullptr;
215
216

46307
  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
46307
  StreamWriteResult res = Write(&buf, 1, send_handle, req_wrap_obj);
232
46307
  SetWriteResult(res);
233
234
46307
  return res.err;
235
}
236
237
238
template <enum encoding enc>
239
58900
int StreamBase::WriteString(const FunctionCallbackInfo<Value>& args) {
240
58900
  Environment* env = Environment::GetCurrent(args);
241
58900
  Isolate* isolate = env->isolate();
242
58900
  CHECK(args[0]->IsObject());
243
117800
  CHECK(args[1]->IsString());
244
245
117800
  Local<Object> req_wrap_obj = args[0].As<Object>();
246
117800
  Local<String> string = args[1].As<String>();
247
  Local<Object> send_handle_obj;
248
58900
  if (args[2]->IsObject())
249
424
    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
58900
  if ((enc == UTF8 &&
256
52196
         string->Length() > 65535 &&
257

111380
         !StringBytes::Size(isolate, string, enc).To(&storage_size)) ||
258

169996
          !StringBytes::StorageSize(isolate, string, enc).To(&storage_size)) {
259
    return -1;
260
  }
261
262
58900
  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
58900
  size_t synchronously_written = 0;
269
  uv_buf_t buf;
270
271
115588
  bool try_write = storage_size <= sizeof(stack_storage) &&
272

67438
                   (!IsIPCPipe() || send_handle_obj.IsEmpty());
273
58900
  if (try_write) {
274
56480
    data_size = StringBytes::Write(isolate,
275
                                   stack_storage,
276
                                   storage_size,
277
                                   string,
278
                                   enc);
279
56480
    buf = uv_buf_init(stack_storage, data_size);
280
281
56480
    uv_buf_t* bufs = &buf;
282
56480
    size_t count = 1;
283
56480
    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
56480
    synchronously_written = count == 0 ? data_size : data_size - buf.len;
288
56480
    bytes_written_ += synchronously_written;
289
290
    // Immediate failure or success
291

56480
    if (err != 0 || count == 0) {
292
51926
      SetWriteResult(StreamWriteResult { false, err, nullptr, data_size, {} });
293
51926
      return err;
294
    }
295
296
    // Partial write
297
4554
    CHECK_EQ(count, 1);
298
  }
299
300
6974
  std::unique_ptr<BackingStore> bs;
301
302
6974
  if (try_write) {
303
    // Copy partial data
304
4554
    NoArrayBufferZeroFillScope no_zero_fill_scope(env->isolate_data());
305
4554
    bs = ArrayBuffer::NewBackingStore(isolate, buf.len);
306
4554
    memcpy(static_cast<char*>(bs->Data()), buf.base, buf.len);
307
4554
    data_size = buf.len;
308
  } else {
309
    // Write it
310
2420
    NoArrayBufferZeroFillScope no_zero_fill_scope(env->isolate_data());
311
2420
    bs = ArrayBuffer::NewBackingStore(isolate, storage_size);
312
2420
    data_size = StringBytes::Write(isolate,
313
2420
                                   static_cast<char*>(bs->Data()),
314
                                   storage_size,
315
                                   string,
316
                                   enc);
317
  }
318
319
6974
  CHECK_LE(data_size, storage_size);
320
321
6974
  buf = uv_buf_init(static_cast<char*>(bs->Data()), data_size);
322
323
6974
  uv_stream_t* send_handle = nullptr;
324
325

7190
  if (IsIPCPipe() && !send_handle_obj.IsEmpty()) {
326
    HandleWrap* wrap;
327
212
    ASSIGN_OR_RETURN_UNWRAP(&wrap, send_handle_obj, UV_EINVAL);
328
212
    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
424
    if (req_wrap_obj->Set(env->context(),
332
                          env->handle_string(),
333
212
                          send_handle_obj).IsNothing()) {
334
      return -1;
335
    }
336
  }
337
338
6974
  StreamWriteResult res = Write(&buf, 1, send_handle, req_wrap_obj);
339
6974
  res.bytes += synchronously_written;
340
341
6974
  SetWriteResult(res);
342
6974
  if (res.wrap != nullptr)
343
6924
    res.wrap->SetBackingStore(std::move(bs));
344
345
6974
  return res.err;
346
}
347
348
349
65516
MaybeLocal<Value> StreamBase::CallJSOnreadMethod(ssize_t nread,
350
                                                 Local<ArrayBuffer> ab,
351
                                                 size_t offset,
352
                                                 StreamBaseJSChecks checks) {
353
65516
  Environment* env = env_;
354
355
  DCHECK_EQ(static_cast<int32_t>(nread), nread);
356
  DCHECK_LE(offset, INT32_MAX);
357
358
65516
  if (checks == DONT_SKIP_NREAD_CHECKS) {
359
63426
    if (ab.IsEmpty()) {
360
      DCHECK_EQ(offset, 0);
361
      DCHECK_LE(nread, 0);
362
    } else {
363
      DCHECK_GE(nread, 0);
364
    }
365
  }
366
367
65516
  env->stream_base_state()[kReadBytesOrError] = static_cast<int32_t>(nread);
368
65516
  env->stream_base_state()[kArrayBufferOffset] = offset;
369
370
  Local<Value> argv[] = {
371
110084
    ab.IsEmpty() ? Undefined(env->isolate()).As<Value>() : ab.As<Value>()
372
65516
  };
373
374
65516
  AsyncWrap* wrap = GetAsyncWrap();
375
65516
  CHECK_NOT_NULL(wrap);
376
65516
  Local<Value> onread = wrap->object()->GetInternalField(
377
131032
      StreamBase::kOnReadFunctionField);
378
65516
  CHECK(onread->IsFunction());
379
131032
  return wrap->MakeCallback(onread.As<Function>(), arraysize(argv), argv);
380
}
381
382
383
4507
bool StreamBase::IsIPCPipe() {
384
4507
  return false;
385
}
386
387
388
int StreamBase::GetFD() {
389
  return -1;
390
}
391
392
393
56382
Local<Object> StreamBase::GetObject() {
394
56382
  return GetAsyncWrap()->object();
395
}
396
397
38820
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
  Local<FunctionTemplate> templ =
404
      env->NewFunctionTemplate(stream_method,
405
                               signature,
406
                               ConstructorBehavior::kThrow,
407
38820
                               SideEffectType::kHasNoSideEffect);
408
77640
  t->PrototypeTemplate()->SetAccessorProperty(
409
      string, templ, Local<FunctionTemplate>(), attributes);
410
38820
}
411
412
9705
void StreamBase::AddMethods(Environment* env, Local<FunctionTemplate> t) {
413
9705
  HandleScope scope(env->isolate());
414
415
9705
  enum PropertyAttribute attributes =
416
      static_cast<PropertyAttribute>(ReadOnly | DontDelete | DontEnum);
417
9705
  Local<Signature> sig = Signature::New(env->isolate(), t);
418
419
9705
  AddMethod(env, sig, attributes, t, GetFD, env->fd_string());
420
9705
  AddMethod(
421
      env, sig, attributes, t, GetExternal, env->external_stream_string());
422
9705
  AddMethod(env, sig, attributes, t, GetBytesRead, env->bytes_read_string());
423
9705
  AddMethod(
424
      env, sig, attributes, t, GetBytesWritten, env->bytes_written_string());
425
9705
  env->SetProtoMethod(t, "readStart", JSMethod<&StreamBase::ReadStartJS>);
426
9705
  env->SetProtoMethod(t, "readStop", JSMethod<&StreamBase::ReadStopJS>);
427
9705
  env->SetProtoMethod(t, "shutdown", JSMethod<&StreamBase::Shutdown>);
428
9705
  env->SetProtoMethod(t,
429
                      "useUserBuffer",
430
                      JSMethod<&StreamBase::UseUserBuffer>);
431
9705
  env->SetProtoMethod(t, "writev", JSMethod<&StreamBase::Writev>);
432
9705
  env->SetProtoMethod(t, "writeBuffer", JSMethod<&StreamBase::WriteBuffer>);
433
9705
  env->SetProtoMethod(
434
      t, "writeAsciiString", JSMethod<&StreamBase::WriteString<ASCII>>);
435
9705
  env->SetProtoMethod(
436
      t, "writeUtf8String", JSMethod<&StreamBase::WriteString<UTF8>>);
437
9705
  env->SetProtoMethod(
438
      t, "writeUcs2String", JSMethod<&StreamBase::WriteString<UCS2>>);
439
9705
  env->SetProtoMethod(
440
      t, "writeLatin1String", JSMethod<&StreamBase::WriteString<LATIN1>>);
441
38820
  t->PrototypeTemplate()->Set(FIXED_ONE_BYTE_STRING(env->isolate(),
442
                                                    "isStreamBase"),
443
                              True(env->isolate()));
444
29115
  t->PrototypeTemplate()->SetAccessor(
445
      FIXED_ONE_BYTE_STRING(env->isolate(), "onread"),
446
      BaseObject::InternalFieldGet<
447
          StreamBase::kOnReadFunctionField>,
448
      BaseObject::InternalFieldSet<
449
          StreamBase::kOnReadFunctionField,
450
          &Value::IsFunction>);
451
9705
}
452
453
10426
void StreamBase::RegisterExternalReferences(
454
    ExternalReferenceRegistry* registry) {
455
  // This function is called by a single thread during start up, so it is safe
456
  // to use a local static variable here.
457
  static bool is_registered = false;
458
10426
  if (is_registered) return;
459
5213
  registry->Register(GetFD);
460
5213
  registry->Register(GetExternal);
461
5213
  registry->Register(GetBytesRead);
462
5213
  registry->Register(GetBytesWritten);
463
5213
  registry->Register(JSMethod<&StreamBase::ReadStartJS>);
464
5213
  registry->Register(JSMethod<&StreamBase::ReadStopJS>);
465
5213
  registry->Register(JSMethod<&StreamBase::Shutdown>);
466
5213
  registry->Register(JSMethod<&StreamBase::UseUserBuffer>);
467
5213
  registry->Register(JSMethod<&StreamBase::Writev>);
468
5213
  registry->Register(JSMethod<&StreamBase::WriteBuffer>);
469
5213
  registry->Register(JSMethod<&StreamBase::WriteString<ASCII>>);
470
5213
  registry->Register(JSMethod<&StreamBase::WriteString<UTF8>>);
471
5213
  registry->Register(JSMethod<&StreamBase::WriteString<UCS2>>);
472
5213
  registry->Register(JSMethod<&StreamBase::WriteString<LATIN1>>);
473
5213
  registry->Register(
474
      BaseObject::InternalFieldGet<StreamBase::kOnReadFunctionField>);
475
5213
  registry->Register(
476
      BaseObject::InternalFieldSet<StreamBase::kOnReadFunctionField,
477
                                   &Value::IsFunction>);
478
5213
  is_registered = true;
479
}
480
481
1553
void StreamBase::GetFD(const FunctionCallbackInfo<Value>& args) {
482
  // Mimic implementation of StreamBase::GetFD() and UDPWrap::GetFD().
483
3106
  StreamBase* wrap = StreamBase::FromObject(args.This().As<Object>());
484
1553
  if (wrap == nullptr) return args.GetReturnValue().Set(UV_EINVAL);
485
486
1553
  if (!wrap->IsAlive()) return args.GetReturnValue().Set(UV_EINVAL);
487
488
3106
  args.GetReturnValue().Set(wrap->GetFD());
489
}
490
491
36274
void StreamBase::GetBytesRead(const FunctionCallbackInfo<Value>& args) {
492
72548
  StreamBase* wrap = StreamBase::FromObject(args.This().As<Object>());
493
36276
  if (wrap == nullptr) return args.GetReturnValue().Set(0);
494
495
  // uint64_t -> double. 53bits is enough for all real cases.
496
72546
  args.GetReturnValue().Set(static_cast<double>(wrap->bytes_read_));
497
}
498
499
36308
void StreamBase::GetBytesWritten(const FunctionCallbackInfo<Value>& args) {
500
72616
  StreamBase* wrap = StreamBase::FromObject(args.This().As<Object>());
501
36308
  if (wrap == nullptr) return args.GetReturnValue().Set(0);
502
503
  // uint64_t -> double. 53bits is enough for all real cases.
504
72616
  args.GetReturnValue().Set(static_cast<double>(wrap->bytes_written_));
505
}
506
507
2
void StreamBase::GetExternal(const FunctionCallbackInfo<Value>& args) {
508
4
  StreamBase* wrap = StreamBase::FromObject(args.This().As<Object>());
509
2
  if (wrap == nullptr) return;
510
511
2
  Local<External> ext = External::New(args.GetIsolate(), wrap);
512
4
  args.GetReturnValue().Set(ext);
513
}
514
515
template <int (StreamBase::*Method)(const FunctionCallbackInfo<Value>& args)>
516
387014
void StreamBase::JSMethod(const FunctionCallbackInfo<Value>& args) {
517
774028
  StreamBase* wrap = StreamBase::FromObject(args.Holder().As<Object>());
518
387018
  if (wrap == nullptr) return;
519
520
387022
  if (!wrap->IsAlive()) return args.GetReturnValue().Set(UV_EINVAL);
521
522
387010
  AsyncHooks::DefaultTriggerAsyncIdScope trigger_scope(wrap->GetAsyncWrap());
523
774020
  args.GetReturnValue().Set((wrap->*Method)(args));
524
}
525
526
11354
int StreamResource::DoTryWrite(uv_buf_t** bufs, size_t* count) {
527
  // No TryWrite by default
528
11354
  return 0;
529
}
530
531
532
57343
const char* StreamResource::Error() const {
533
57343
  return nullptr;
534
}
535
536
537
void StreamResource::ClearError() {
538
  // No-op
539
}
540
541
542
34991
uv_buf_t EmitToJSStreamListener::OnStreamAlloc(size_t suggested_size) {
543
34991
  CHECK_NOT_NULL(stream_);
544
34991
  Environment* env = static_cast<StreamBase*>(stream_)->stream_env();
545
34991
  return env->allocate_managed_buffer(suggested_size);
546
}
547
548
49614
void EmitToJSStreamListener::OnStreamRead(ssize_t nread, const uv_buf_t& buf_) {
549
49614
  CHECK_NOT_NULL(stream_);
550
49614
  StreamBase* stream = static_cast<StreamBase*>(stream_);
551
49614
  Environment* env = stream->stream_env();
552
49614
  Isolate* isolate = env->isolate();
553
49614
  HandleScope handle_scope(isolate);
554
49614
  Context::Scope context_scope(env->context());
555
49614
  std::unique_ptr<BackingStore> bs = env->release_managed_buffer(buf_);
556
557
49614
  if (nread <= 0)  {
558
20200
    if (nread < 0)
559
20188
      stream->CallJSOnreadMethod(nread, Local<ArrayBuffer>());
560
20142
    return;
561
  }
562
563
29414
  CHECK_LE(static_cast<size_t>(nread), bs->ByteLength());
564
29414
  bs = BackingStore::Reallocate(isolate, std::move(bs), nread);
565
566
29414
  stream->CallJSOnreadMethod(nread, ArrayBuffer::New(isolate, std::move(bs)));
567
}
568
569
570
2090
uv_buf_t CustomBufferJSListener::OnStreamAlloc(size_t suggested_size) {
571
2090
  return buffer_;
572
}
573
574
575
2096
void CustomBufferJSListener::OnStreamRead(ssize_t nread, const uv_buf_t& buf) {
576
2096
  CHECK_NOT_NULL(stream_);
577
578
2096
  StreamBase* stream = static_cast<StreamBase*>(stream_);
579
2096
  Environment* env = stream->stream_env();
580
2096
  HandleScope handle_scope(env->isolate());
581
2096
  Context::Scope context_scope(env->context());
582
583
  // To deal with the case where POLLHUP is received and UV_EOF is returned, as
584
  // libuv returns an empty buffer (on unices only).
585

2096
  if (nread == UV_EOF && buf.base == nullptr) {
586
6
    stream->CallJSOnreadMethod(nread, Local<ArrayBuffer>());
587
6
    return;
588
  }
589
590
2090
  CHECK_EQ(buf.base, buffer_.base);
591
592
  MaybeLocal<Value> ret = stream->CallJSOnreadMethod(nread,
593
                             Local<ArrayBuffer>(),
594
                             0,
595
2090
                             StreamBase::SKIP_NREAD_CHECKS);
596
  Local<Value> next_buf_v;
597

6270
  if (ret.ToLocal(&next_buf_v) && !next_buf_v->IsUndefined()) {
598
24
    buffer_.base = Buffer::Data(next_buf_v);
599
24
    buffer_.len = Buffer::Length(next_buf_v);
600
  }
601
}
602
603
604
15848
void ReportWritesToJSStreamListener::OnStreamAfterReqFinished(
605
    StreamReq* req_wrap, int status) {
606
15848
  StreamBase* stream = static_cast<StreamBase*>(stream_);
607
15848
  Environment* env = stream->stream_env();
608
15848
  if (env->is_stopping()) return;
609
15443
  AsyncWrap* async_wrap = req_wrap->GetAsyncWrap();
610
30885
  HandleScope handle_scope(env->isolate());
611
15443
  Context::Scope context_scope(env->context());
612
15443
  CHECK(!async_wrap->persistent().IsEmpty());
613
15443
  Local<Object> req_wrap_obj = async_wrap->object();
614
615
  Local<Value> argv[] = {
616
    Integer::New(env->isolate(), status),
617
15443
    stream->GetObject(),
618
    Undefined(env->isolate())
619
46329
  };
620
621
15443
  const char* msg = stream->Error();
622
15443
  if (msg != nullptr) {
623
    argv[2] = OneByteString(env->isolate(), msg);
624
    stream->ClearError();
625
  }
626
627
46329
  if (req_wrap_obj->Has(env->context(), env->oncomplete_string()).FromJust())
628
15442
    async_wrap->MakeCallback(env->oncomplete_string(), arraysize(argv), argv);
629
}
630
631
5824
void ReportWritesToJSStreamListener::OnStreamAfterWrite(
632
    WriteWrap* req_wrap, int status) {
633
5824
  OnStreamAfterReqFinished(req_wrap, status);
634
5823
}
635
636
10024
void ReportWritesToJSStreamListener::OnStreamAfterShutdown(
637
    ShutdownWrap* req_wrap, int status) {
638
10024
  OnStreamAfterReqFinished(req_wrap, status);
639
10024
}
640
641
10024
void ShutdownWrap::OnDone(int status) {
642
10024
  stream()->EmitAfterShutdown(this, status);
643
10024
  Dispose();
644
10024
}
645
646
8896
void WriteWrap::OnDone(int status) {
647
8896
  stream()->EmitAfterWrite(this, status);
648
8895
  Dispose();
649
8895
}
650
651
463648
StreamListener::~StreamListener() {
652
231824
  if (stream_ != nullptr)
653
195552
    stream_->RemoveStreamListener(this);
654
}
655
656
3936
void StreamListener::OnStreamAfterShutdown(ShutdownWrap* w, int status) {
657
3936
  CHECK_NOT_NULL(previous_listener_);
658
3936
  previous_listener_->OnStreamAfterShutdown(w, status);
659
3936
}
660
661
4498
void StreamListener::OnStreamAfterWrite(WriteWrap* w, int status) {
662
4498
  CHECK_NOT_NULL(previous_listener_);
663
4498
  previous_listener_->OnStreamAfterWrite(w, status);
664
4498
}
665
666
140472
StreamResource::~StreamResource() {
667
141736
  while (listener_ != nullptr) {
668
1264
    StreamListener* listener = listener_;
669
1264
    listener->OnStreamDestroy();
670
    // Remove the listener if it didn’t remove itself. This makes the logic
671
    // in `OnStreamDestroy()` implementations easier, because they
672
    // may call generic cleanup functions which can just remove the
673
    // listener unconditionally.
674
1264
    if (listener == listener_)
675
1240
      RemoveStreamListener(listener_);
676
  }
677
}
678
679
13
ShutdownWrap* StreamBase::CreateShutdownWrap(
680
    Local<Object> object) {
681
13
  auto* wrap = new SimpleShutdownWrap<AsyncWrap>(this, object);
682
13
  wrap->MakeWeak();
683
13
  return wrap;
684
}
685
686
9076
WriteWrap* StreamBase::CreateWriteWrap(
687
    Local<Object> object) {
688
9076
  auto* wrap = new SimpleWriteWrap<AsyncWrap>(this, object);
689
9076
  wrap->MakeWeak();
690
9076
  return wrap;
691
}
692
693
}  // namespace node