GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: stream_wrap.cc Lines: 180 186 96.8 %
Date: 2022-09-02 04:23:42 Branches: 51 76 67.1 %

Line Branch Exec Source
1
// Copyright Joyent, Inc. and other Node contributors.
2
//
3
// Permission is hereby granted, free of charge, to any person obtaining a
4
// copy of this software and associated documentation files (the
5
// "Software"), to deal in the Software without restriction, including
6
// without limitation the rights to use, copy, modify, merge, publish,
7
// distribute, sublicense, and/or sell copies of the Software, and to permit
8
// persons to whom the Software is furnished to do so, subject to the
9
// following conditions:
10
//
11
// The above copyright notice and this permission notice shall be included
12
// in all copies or substantial portions of the Software.
13
//
14
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
15
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
16
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
17
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
18
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
19
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
20
// USE OR OTHER DEALINGS IN THE SOFTWARE.
21
22
#include "stream_wrap.h"
23
#include "stream_base-inl.h"
24
25
#include "env-inl.h"
26
#include "handle_wrap.h"
27
#include "node_buffer.h"
28
#include "node_errors.h"
29
#include "node_external_reference.h"
30
#include "pipe_wrap.h"
31
#include "req_wrap-inl.h"
32
#include "tcp_wrap.h"
33
#include "udp_wrap.h"
34
#include "util-inl.h"
35
36
#include <cstring>  // memcpy()
37
#include <climits>  // INT_MAX
38
39
40
namespace node {
41
42
using errors::TryCatchScope;
43
using v8::Context;
44
using v8::DontDelete;
45
using v8::EscapableHandleScope;
46
using v8::FunctionCallbackInfo;
47
using v8::FunctionTemplate;
48
using v8::HandleScope;
49
using v8::Isolate;
50
using v8::JustVoid;
51
using v8::Local;
52
using v8::Maybe;
53
using v8::MaybeLocal;
54
using v8::Nothing;
55
using v8::Object;
56
using v8::PropertyAttribute;
57
using v8::ReadOnly;
58
using v8::Signature;
59
using v8::Value;
60
61
119419
void IsConstructCallCallback(const FunctionCallbackInfo<Value>& args) {
62
119419
  CHECK(args.IsConstructCall());
63
119419
  StreamReq::ResetObject(args.This());
64
119419
}
65
66
774
void LibuvStreamWrap::Initialize(Local<Object> target,
67
                                 Local<Value> unused,
68
                                 Local<Context> context,
69
                                 void* priv) {
70
774
  Environment* env = Environment::GetCurrent(context);
71
774
  Isolate* isolate = env->isolate();
72
73
  Local<FunctionTemplate> sw =
74
774
      NewFunctionTemplate(isolate, IsConstructCallCallback);
75
1548
  sw->InstanceTemplate()->SetInternalFieldCount(StreamReq::kInternalFieldCount);
76
77
  // we need to set handle and callback to null,
78
  // so that those fields are created and functions
79
  // do not become megamorphic
80
  // Fields:
81
  // - oncomplete
82
  // - callback
83
  // - handle
84
3096
  sw->InstanceTemplate()->Set(env->oncomplete_string(), v8::Null(isolate));
85
3096
  sw->InstanceTemplate()->Set(FIXED_ONE_BYTE_STRING(isolate, "callback"),
86
                              v8::Null(isolate));
87
3096
  sw->InstanceTemplate()->Set(FIXED_ONE_BYTE_STRING(isolate, "handle"),
88
                              v8::Null(isolate));
89
90
774
  sw->Inherit(AsyncWrap::GetConstructorTemplate(env));
91
92
774
  SetConstructorFunction(context, target, "ShutdownWrap", sw);
93
774
  env->set_shutdown_wrap_template(sw->InstanceTemplate());
94
95
  Local<FunctionTemplate> ww =
96
774
      FunctionTemplate::New(isolate, IsConstructCallCallback);
97
1548
  ww->InstanceTemplate()->SetInternalFieldCount(
98
      StreamReq::kInternalFieldCount);
99
774
  ww->Inherit(AsyncWrap::GetConstructorTemplate(env));
100
774
  SetConstructorFunction(context, target, "WriteWrap", ww);
101
774
  env->set_write_wrap_template(ww->InstanceTemplate());
102
103
2322
  NODE_DEFINE_CONSTANT(target, kReadBytesOrError);
104
2322
  NODE_DEFINE_CONSTANT(target, kArrayBufferOffset);
105
2322
  NODE_DEFINE_CONSTANT(target, kBytesWritten);
106
2322
  NODE_DEFINE_CONSTANT(target, kLastWriteWasAsync);
107
  target
108
774
      ->Set(context,
109
            FIXED_ONE_BYTE_STRING(isolate, "streamBaseState"),
110
2322
            env->stream_base_state().GetJSArray())
111
      .Check();
112
774
}
113
114
5365
void LibuvStreamWrap::RegisterExternalReferences(
115
    ExternalReferenceRegistry* registry) {
116
5365
  registry->Register(IsConstructCallCallback);
117
5365
  registry->Register(GetWriteQueueSize);
118
5365
  registry->Register(SetBlocking);
119
5365
  StreamBase::RegisterExternalReferences(registry);
120
5365
}
121
122
18818
LibuvStreamWrap::LibuvStreamWrap(Environment* env,
123
                                 Local<Object> object,
124
                                 uv_stream_t* stream,
125
18818
                                 AsyncWrap::ProviderType provider)
126
    : HandleWrap(env,
127
                 object,
128
                 reinterpret_cast<uv_handle_t*>(stream),
129
                 provider),
130
      StreamBase(env),
131
18818
      stream_(stream) {
132
18818
  StreamBase::AttachToObject(object);
133
18818
}
134
135
136
16979
Local<FunctionTemplate> LibuvStreamWrap::GetConstructorTemplate(
137
    Environment* env) {
138
16979
  Local<FunctionTemplate> tmpl = env->libuv_stream_wrap_ctor_template();
139
16979
  if (tmpl.IsEmpty()) {
140
6095
    Isolate* isolate = env->isolate();
141
6095
    tmpl = NewFunctionTemplate(isolate, nullptr);
142
6095
    tmpl->SetClassName(FIXED_ONE_BYTE_STRING(isolate, "LibuvStreamWrap"));
143
6095
    tmpl->Inherit(HandleWrap::GetConstructorTemplate(env));
144
12190
    tmpl->InstanceTemplate()->SetInternalFieldCount(
145
        StreamBase::kInternalFieldCount);
146
    Local<FunctionTemplate> get_write_queue_size =
147
        FunctionTemplate::New(isolate,
148
                              GetWriteQueueSize,
149
                              Local<Value>(),
150
6095
                              Signature::New(isolate, tmpl));
151
24380
    tmpl->PrototypeTemplate()->SetAccessorProperty(
152
        env->write_queue_size_string(),
153
        get_write_queue_size,
154
        Local<FunctionTemplate>(),
155
        static_cast<PropertyAttribute>(ReadOnly | DontDelete));
156
6095
    SetProtoMethod(isolate, tmpl, "setBlocking", SetBlocking);
157
6095
    StreamBase::AddMethods(env, tmpl);
158
6095
    env->set_libuv_stream_wrap_ctor_template(tmpl);
159
  }
160
16979
  return tmpl;
161
}
162
163
164
4157
LibuvStreamWrap* LibuvStreamWrap::From(Environment* env, Local<Object> object) {
165
4157
  Local<FunctionTemplate> sw = env->libuv_stream_wrap_ctor_template();
166

8314
  CHECK(!sw.IsEmpty() && sw->HasInstance(object));
167
4157
  return Unwrap<LibuvStreamWrap>(object);
168
}
169
170
171
118
int LibuvStreamWrap::GetFD() {
172
#ifdef _WIN32
173
  return fd_;
174
#else
175
118
  int fd = -1;
176
118
  if (stream() != nullptr)
177
118
    uv_fileno(reinterpret_cast<uv_handle_t*>(stream()), &fd);
178
118
  return fd;
179
#endif
180
}
181
182
183
119590
bool LibuvStreamWrap::IsAlive() {
184
119590
  return HandleWrap::IsAlive(this);
185
}
186
187
188
3
bool LibuvStreamWrap::IsClosing() {
189
3
  return uv_is_closing(reinterpret_cast<uv_handle_t*>(stream()));
190
}
191
192
193
161273
AsyncWrap* LibuvStreamWrap::GetAsyncWrap() {
194
161273
  return static_cast<AsyncWrap*>(this);
195
}
196
197
198
26947
bool LibuvStreamWrap::IsIPCPipe() {
199
26947
  return is_named_pipe_ipc();
200
}
201
202
21725
int LibuvStreamWrap::ReadStart() {
203
43450
  return uv_read_start(
204
      stream(),
205
71676
      [](uv_handle_t* handle, size_t suggested_size, uv_buf_t* buf) {
206
71676
        static_cast<LibuvStreamWrap*>(handle->data)
207
71676
            ->OnUvAlloc(suggested_size, buf);
208
71676
      },
209
71902
      [](uv_stream_t* stream, ssize_t nread, const uv_buf_t* buf) {
210
71902
        LibuvStreamWrap* wrap = static_cast<LibuvStreamWrap*>(stream->data);
211
143672
        TryCatchScope try_catch(wrap->env());
212
71902
        try_catch.SetVerbose(true);
213
71902
        wrap->OnUvRead(nread, buf);
214
21725
      });
215
}
216
217
218
9201
int LibuvStreamWrap::ReadStop() {
219
9201
  return uv_read_stop(stream());
220
}
221
222
223
71676
void LibuvStreamWrap::OnUvAlloc(size_t suggested_size, uv_buf_t* buf) {
224
143352
  HandleScope scope(env()->isolate());
225
71676
  Context::Scope context_scope(env()->context());
226
227
71676
  *buf = EmitAlloc(suggested_size);
228
71676
}
229
230
template <class WrapType>
231
358
static MaybeLocal<Object> AcceptHandle(Environment* env,
232
                                       LibuvStreamWrap* parent) {
233
  static_assert(std::is_base_of<LibuvStreamWrap, WrapType>::value ||
234
                std::is_base_of<UDPWrap, WrapType>::value,
235
                "Can only accept stream handles");
236
237
358
  EscapableHandleScope scope(env->isolate());
238
  Local<Object> wrap_obj;
239
240
716
  if (!WrapType::Instantiate(env, parent, WrapType::SOCKET).ToLocal(&wrap_obj))
241
    return Local<Object>();
242
243
358
  HandleWrap* wrap = Unwrap<HandleWrap>(wrap_obj);
244
358
  CHECK_NOT_NULL(wrap);
245
358
  uv_stream_t* stream = reinterpret_cast<uv_stream_t*>(wrap->GetHandle());
246
358
  CHECK_NOT_NULL(stream);
247
248
358
  if (uv_accept(parent->stream(), stream))
249
    ABORT();
250
251
358
  return scope.Escape(wrap_obj);
252
}
253
254
71902
Maybe<void> LibuvStreamWrap::OnUvRead(ssize_t nread, const uv_buf_t* buf) {
255
143672
  HandleScope scope(env()->isolate());
256
71902
  Context::Scope context_scope(env()->context());
257
71902
  uv_handle_type type = UV_UNKNOWN_HANDLE;
258
259

75192
  if (is_named_pipe_ipc() &&
260
3290
      uv_pipe_pending_count(reinterpret_cast<uv_pipe_t*>(stream())) > 0) {
261
179
    type = uv_pipe_pending_type(reinterpret_cast<uv_pipe_t*>(stream()));
262
  }
263
264
  // We should not be getting this callback if someone has already called
265
  // uv_close() on the handle.
266
71902
  CHECK_EQ(persistent().IsEmpty(), false);
267
268
71902
  if (nread > 0) {
269
    MaybeLocal<Object> pending_obj;
270
271
66082
    if (type == UV_TCP) {
272
128
      pending_obj = AcceptHandle<TCPWrap>(env(), this);
273
65954
    } else if (type == UV_NAMED_PIPE) {
274
18
      pending_obj = AcceptHandle<PipeWrap>(env(), this);
275
65936
    } else if (type == UV_UDP) {
276
33
      pending_obj = AcceptHandle<UDPWrap>(env(), this);
277
    } else {
278
65903
      CHECK_EQ(type, UV_UNKNOWN_HANDLE);
279
    }
280
281
    Local<Object> local_pending_obj;
282
66261
    if (type != UV_UNKNOWN_HANDLE &&
283
179
        (!pending_obj.ToLocal(&local_pending_obj) ||
284
179
         object()
285
66082
             ->Set(env()->context(),
286
                   env()->pending_handle_string(),
287
66440
                   local_pending_obj)
288
179
             .IsNothing())) {
289
      return Nothing<void>();
290
    }
291
  }
292
293
71902
  EmitRead(nread, *buf);
294
71770
  return JustVoid();
295
}
296
297
5515
void LibuvStreamWrap::GetWriteQueueSize(
298
    const FunctionCallbackInfo<Value>& info) {
299
  LibuvStreamWrap* wrap;
300
5515
  ASSIGN_OR_RETURN_UNWRAP(&wrap, info.This());
301
302
5515
  if (wrap->stream() == nullptr) {
303
    info.GetReturnValue().Set(0);
304
    return;
305
  }
306
307
5515
  uint32_t write_queue_size = wrap->stream()->write_queue_size;
308
11030
  info.GetReturnValue().Set(write_queue_size);
309
}
310
311
312
32
void LibuvStreamWrap::SetBlocking(const FunctionCallbackInfo<Value>& args) {
313
  LibuvStreamWrap* wrap;
314
32
  ASSIGN_OR_RETURN_UNWRAP(&wrap, args.Holder());
315
316
32
  CHECK_GT(args.Length(), 0);
317
32
  if (!wrap->IsAlive())
318
    return args.GetReturnValue().Set(UV_EINVAL);
319
320
32
  bool enable = args[0]->IsTrue();
321
64
  args.GetReturnValue().Set(uv_stream_set_blocking(wrap->stream(), enable));
322
}
323
324
typedef SimpleShutdownWrap<ReqWrap<uv_shutdown_t>> LibuvShutdownWrap;
325
typedef SimpleWriteWrap<ReqWrap<uv_write_t>> LibuvWriteWrap;
326
327
7302
ShutdownWrap* LibuvStreamWrap::CreateShutdownWrap(Local<Object> object) {
328
7302
  return new LibuvShutdownWrap(this, object);
329
}
330
331
267
WriteWrap* LibuvStreamWrap::CreateWriteWrap(Local<Object> object) {
332
267
  return new LibuvWriteWrap(this, object);
333
}
334
335
336
7302
int LibuvStreamWrap::DoShutdown(ShutdownWrap* req_wrap_) {
337
7302
  LibuvShutdownWrap* req_wrap = static_cast<LibuvShutdownWrap*>(req_wrap_);
338
7302
  return req_wrap->Dispatch(uv_shutdown, stream(), AfterUvShutdown);
339
}
340
341
342
7298
void LibuvStreamWrap::AfterUvShutdown(uv_shutdown_t* req, int status) {
343
7298
  LibuvShutdownWrap* req_wrap = static_cast<LibuvShutdownWrap*>(
344
7298
      LibuvShutdownWrap::from_req(req));
345
7298
  CHECK_NOT_NULL(req_wrap);
346
14596
  HandleScope scope(req_wrap->env()->isolate());
347
7298
  Context::Scope context_scope(req_wrap->env()->context());
348
7298
  req_wrap->Done(status);
349
7298
}
350
351
352
// NOTE: Call to this function could change both `buf`'s and `count`'s
353
// values, shifting their base and decrementing their length. This is
354
// required in order to skip the data that was successfully written via
355
// uv_try_write().
356
120076
int LibuvStreamWrap::DoTryWrite(uv_buf_t** bufs, size_t* count) {
357
  int err;
358
  size_t written;
359
120076
  uv_buf_t* vbufs = *bufs;
360
120076
  size_t vcount = *count;
361
362
120076
  err = uv_try_write(stream(), vbufs, vcount);
363

120076
  if (err == UV_ENOSYS || err == UV_EAGAIN)
364
7
    return 0;
365
120069
  if (err < 0)
366
3336
    return err;
367
368
  // Slice off the buffers: skip all written buffers and slice the one that
369
  // was partially written.
370
116733
  written = err;
371
311294
  for (; vcount > 0; vbufs++, vcount--) {
372
    // Slice
373
194696
    if (vbufs[0].len > written) {
374
135
      vbufs[0].base += written;
375
135
      vbufs[0].len -= written;
376
135
      written = 0;
377
135
      break;
378
379
    // Discard
380
    } else {
381
194561
      written -= vbufs[0].len;
382
    }
383
  }
384
385
116733
  *bufs = vbufs;
386
116733
  *count = vcount;
387
388
116733
  return 0;
389
}
390
391
392
267
int LibuvStreamWrap::DoWrite(WriteWrap* req_wrap,
393
                             uv_buf_t* bufs,
394
                             size_t count,
395
                             uv_stream_t* send_handle) {
396
267
  LibuvWriteWrap* w = static_cast<LibuvWriteWrap*>(req_wrap);
397
267
  return w->Dispatch(uv_write2,
398
                     stream(),
399
                     bufs,
400
                     count,
401
                     send_handle,
402
267
                     AfterUvWrite);
403
}
404
405
406
407
265
void LibuvStreamWrap::AfterUvWrite(uv_write_t* req, int status) {
408
265
  LibuvWriteWrap* req_wrap = static_cast<LibuvWriteWrap*>(
409
265
      LibuvWriteWrap::from_req(req));
410
265
  CHECK_NOT_NULL(req_wrap);
411
529
  HandleScope scope(req_wrap->env()->isolate());
412
265
  Context::Scope context_scope(req_wrap->env()->context());
413
265
  req_wrap->Done(status);
414
264
}
415
416
}  // namespace node
417
418
5427
NODE_MODULE_CONTEXT_AWARE_INTERNAL(stream_wrap,
419
                                   node::LibuvStreamWrap::Initialize)
420
5365
NODE_MODULE_EXTERNAL_REFERENCE(
421
    stream_wrap, node::LibuvStreamWrap::RegisterExternalReferences)