Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	stream_wrap.cc	Lines:	178	184	96.7 %
Date:	2022-07-23 04:17:00	Branches:	51	76	67.1 %


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

#include "stream_wrap.h"
#include "stream_base-inl.h"

#include "env-inl.h"
#include "handle_wrap.h"
#include "node_buffer.h"
#include "node_errors.h"
#include "node_external_reference.h"
#include "pipe_wrap.h"
#include "req_wrap-inl.h"
#include "tcp_wrap.h"
#include "udp_wrap.h"
#include "util-inl.h"

#include <cstring>  // memcpy()
#include <climits>  // INT_MAX


namespace node {

using errors::TryCatchScope;
using v8::Context;
using v8::DontDelete;
using v8::EscapableHandleScope;
using v8::FunctionCallbackInfo;
using v8::FunctionTemplate;
using v8::HandleScope;
using v8::JustVoid;
using v8::Local;
using v8::Maybe;
using v8::MaybeLocal;
using v8::Nothing;
using v8::Object;
using v8::PropertyAttribute;
using v8::ReadOnly;
using v8::Signature;
using v8::Value;

void IsConstructCallCallback(const FunctionCallbackInfo<Value>& args) {
  CHECK(args.IsConstructCall());
  StreamReq::ResetObject(args.This());
}

void LibuvStreamWrap::Initialize(Local<Object> target,
                                 Local<Value> unused,
                                 Local<Context> context,
                                 void* priv) {
  Environment* env = Environment::GetCurrent(context);

  Local<FunctionTemplate> sw =
      FunctionTemplate::New(env->isolate(), IsConstructCallCallback);
  sw->InstanceTemplate()->SetInternalFieldCount(StreamReq::kInternalFieldCount);

  // we need to set handle and callback to null,
  // so that those fields are created and functions
  // do not become megamorphic
  // Fields:
  // - oncomplete
  // - callback
  // - handle
  sw->InstanceTemplate()->Set(
      env->oncomplete_string(),
      v8::Null(env->isolate()));
  sw->InstanceTemplate()->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "callback"),
      v8::Null(env->isolate()));
  sw->InstanceTemplate()->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "handle"),
      v8::Null(env->isolate()));

  sw->Inherit(AsyncWrap::GetConstructorTemplate(env));

  env->SetConstructorFunction(target, "ShutdownWrap", sw);
  env->set_shutdown_wrap_template(sw->InstanceTemplate());

  Local<FunctionTemplate> ww =
      FunctionTemplate::New(env->isolate(), IsConstructCallCallback);
  ww->InstanceTemplate()->SetInternalFieldCount(
      StreamReq::kInternalFieldCount);
  ww->Inherit(AsyncWrap::GetConstructorTemplate(env));
  env->SetConstructorFunction(target, "WriteWrap", ww);
  env->set_write_wrap_template(ww->InstanceTemplate());

  NODE_DEFINE_CONSTANT(target, kReadBytesOrError);
  NODE_DEFINE_CONSTANT(target, kArrayBufferOffset);
  NODE_DEFINE_CONSTANT(target, kBytesWritten);
  NODE_DEFINE_CONSTANT(target, kLastWriteWasAsync);
  target->Set(context, FIXED_ONE_BYTE_STRING(env->isolate(), "streamBaseState"),
              env->stream_base_state().GetJSArray()).Check();
}

void LibuvStreamWrap::RegisterExternalReferences(
    ExternalReferenceRegistry* registry) {
  registry->Register(IsConstructCallCallback);
  registry->Register(GetWriteQueueSize);
  registry->Register(SetBlocking);
  StreamBase::RegisterExternalReferences(registry);
}

LibuvStreamWrap::LibuvStreamWrap(Environment* env,
                                 Local<Object> object,
                                 uv_stream_t* stream,
                                 AsyncWrap::ProviderType provider)
    : HandleWrap(env,
                 object,
                 reinterpret_cast<uv_handle_t*>(stream),
                 provider),
      StreamBase(env),
      stream_(stream) {
  StreamBase::AttachToObject(object);
}


Local<FunctionTemplate> LibuvStreamWrap::GetConstructorTemplate(
    Environment* env) {
  Local<FunctionTemplate> tmpl = env->libuv_stream_wrap_ctor_template();
  if (tmpl.IsEmpty()) {
    tmpl = env->NewFunctionTemplate(nullptr);
    tmpl->SetClassName(
        FIXED_ONE_BYTE_STRING(env->isolate(), "LibuvStreamWrap"));
    tmpl->Inherit(HandleWrap::GetConstructorTemplate(env));
    tmpl->InstanceTemplate()->SetInternalFieldCount(
        StreamBase::kInternalFieldCount);
    Local<FunctionTemplate> get_write_queue_size =
        FunctionTemplate::New(env->isolate(),
                              GetWriteQueueSize,
                              Local<Value>(),
                              Signature::New(env->isolate(), tmpl));
    tmpl->PrototypeTemplate()->SetAccessorProperty(
        env->write_queue_size_string(),
        get_write_queue_size,
        Local<FunctionTemplate>(),
        static_cast<PropertyAttribute>(ReadOnly | DontDelete));
    env->SetProtoMethod(tmpl, "setBlocking", SetBlocking);
    StreamBase::AddMethods(env, tmpl);
    env->set_libuv_stream_wrap_ctor_template(tmpl);
  }
  return tmpl;
}


LibuvStreamWrap* LibuvStreamWrap::From(Environment* env, Local<Object> object) {
  Local<FunctionTemplate> sw = env->libuv_stream_wrap_ctor_template();
  CHECK(!sw.IsEmpty() && sw->HasInstance(object));
  return Unwrap<LibuvStreamWrap>(object);
}


int LibuvStreamWrap::GetFD() {
#ifdef _WIN32
  return fd_;
#else
  int fd = -1;
  if (stream() != nullptr)
    uv_fileno(reinterpret_cast<uv_handle_t*>(stream()), &fd);
  return fd;
#endif
}


bool LibuvStreamWrap::IsAlive() {
  return HandleWrap::IsAlive(this);
}


bool LibuvStreamWrap::IsClosing() {
  return uv_is_closing(reinterpret_cast<uv_handle_t*>(stream()));
}


AsyncWrap* LibuvStreamWrap::GetAsyncWrap() {
  return static_cast<AsyncWrap*>(this);
}


bool LibuvStreamWrap::IsIPCPipe() {
  return is_named_pipe_ipc();
}

int LibuvStreamWrap::ReadStart() {
  return uv_read_start(
      stream(),
      [](uv_handle_t* handle, size_t suggested_size, uv_buf_t* buf) {
        static_cast<LibuvStreamWrap*>(handle->data)
            ->OnUvAlloc(suggested_size, buf);
      },
      [](uv_stream_t* stream, ssize_t nread, const uv_buf_t* buf) {
        LibuvStreamWrap* wrap = static_cast<LibuvStreamWrap*>(stream->data);
        TryCatchScope try_catch(wrap->env());
        try_catch.SetVerbose(true);
        wrap->OnUvRead(nread, buf);
      });
}


int LibuvStreamWrap::ReadStop() {
  return uv_read_stop(stream());
}


void LibuvStreamWrap::OnUvAlloc(size_t suggested_size, uv_buf_t* buf) {
  HandleScope scope(env()->isolate());
  Context::Scope context_scope(env()->context());

  *buf = EmitAlloc(suggested_size);
}

template <class WrapType>
static MaybeLocal<Object> AcceptHandle(Environment* env,
                                       LibuvStreamWrap* parent) {
  static_assert(std::is_base_of<LibuvStreamWrap, WrapType>::value ||
                std::is_base_of<UDPWrap, WrapType>::value,
                "Can only accept stream handles");

  EscapableHandleScope scope(env->isolate());
  Local<Object> wrap_obj;

  if (!WrapType::Instantiate(env, parent, WrapType::SOCKET).ToLocal(&wrap_obj))
    return Local<Object>();

  HandleWrap* wrap = Unwrap<HandleWrap>(wrap_obj);
  CHECK_NOT_NULL(wrap);
  uv_stream_t* stream = reinterpret_cast<uv_stream_t*>(wrap->GetHandle());
  CHECK_NOT_NULL(stream);

  if (uv_accept(parent->stream(), stream))
    ABORT();

  return scope.Escape(wrap_obj);
}

Maybe<void> LibuvStreamWrap::OnUvRead(ssize_t nread, const uv_buf_t* buf) {
  HandleScope scope(env()->isolate());
  Context::Scope context_scope(env()->context());
  uv_handle_type type = UV_UNKNOWN_HANDLE;

  if (is_named_pipe_ipc() &&
      uv_pipe_pending_count(reinterpret_cast<uv_pipe_t*>(stream())) > 0) {
    type = uv_pipe_pending_type(reinterpret_cast<uv_pipe_t*>(stream()));
  }

  // We should not be getting this callback if someone has already called
  // uv_close() on the handle.
  CHECK_EQ(persistent().IsEmpty(), false);

  if (nread > 0) {
    MaybeLocal<Object> pending_obj;

    if (type == UV_TCP) {
      pending_obj = AcceptHandle<TCPWrap>(env(), this);
    } else if (type == UV_NAMED_PIPE) {
      pending_obj = AcceptHandle<PipeWrap>(env(), this);
    } else if (type == UV_UDP) {
      pending_obj = AcceptHandle<UDPWrap>(env(), this);
    } else {
      CHECK_EQ(type, UV_UNKNOWN_HANDLE);
    }

    Local<Object> local_pending_obj;
    if (type != UV_UNKNOWN_HANDLE &&
        (!pending_obj.ToLocal(&local_pending_obj) ||
         object()
             ->Set(env()->context(),
                   env()->pending_handle_string(),
                   local_pending_obj)
             .IsNothing())) {
      return Nothing<void>();
    }
  }

  EmitRead(nread, *buf);
  return JustVoid();
}

void LibuvStreamWrap::GetWriteQueueSize(
    const FunctionCallbackInfo<Value>& info) {
  LibuvStreamWrap* wrap;
  ASSIGN_OR_RETURN_UNWRAP(&wrap, info.This());

  if (wrap->stream() == nullptr) {
    info.GetReturnValue().Set(0);
    return;
  }

  uint32_t write_queue_size = wrap->stream()->write_queue_size;
  info.GetReturnValue().Set(write_queue_size);
}


void LibuvStreamWrap::SetBlocking(const FunctionCallbackInfo<Value>& args) {
  LibuvStreamWrap* wrap;
  ASSIGN_OR_RETURN_UNWRAP(&wrap, args.Holder());

  CHECK_GT(args.Length(), 0);
  if (!wrap->IsAlive())
    return args.GetReturnValue().Set(UV_EINVAL);

  bool enable = args[0]->IsTrue();
  args.GetReturnValue().Set(uv_stream_set_blocking(wrap->stream(), enable));
}

typedef SimpleShutdownWrap<ReqWrap<uv_shutdown_t>> LibuvShutdownWrap;
typedef SimpleWriteWrap<ReqWrap<uv_write_t>> LibuvWriteWrap;

ShutdownWrap* LibuvStreamWrap::CreateShutdownWrap(Local<Object> object) {
  return new LibuvShutdownWrap(this, object);
}

WriteWrap* LibuvStreamWrap::CreateWriteWrap(Local<Object> object) {
  return new LibuvWriteWrap(this, object);
}


int LibuvStreamWrap::DoShutdown(ShutdownWrap* req_wrap_) {
  LibuvShutdownWrap* req_wrap = static_cast<LibuvShutdownWrap*>(req_wrap_);
  return req_wrap->Dispatch(uv_shutdown, stream(), AfterUvShutdown);
}


void LibuvStreamWrap::AfterUvShutdown(uv_shutdown_t* req, int status) {
  LibuvShutdownWrap* req_wrap = static_cast<LibuvShutdownWrap*>(
      LibuvShutdownWrap::from_req(req));
  CHECK_NOT_NULL(req_wrap);
  HandleScope scope(req_wrap->env()->isolate());
  Context::Scope context_scope(req_wrap->env()->context());
  req_wrap->Done(status);
}


// NOTE: Call to this function could change both `buf`'s and `count`'s
// values, shifting their base and decrementing their length. This is
// required in order to skip the data that was successfully written via
// uv_try_write().
int LibuvStreamWrap::DoTryWrite(uv_buf_t** bufs, size_t* count) {
  int err;
  size_t written;
  uv_buf_t* vbufs = *bufs;
  size_t vcount = *count;

  err = uv_try_write(stream(), vbufs, vcount);
  if (err == UV_ENOSYS || err == UV_EAGAIN)
    return 0;
  if (err < 0)
    return err;

  // Slice off the buffers: skip all written buffers and slice the one that
  // was partially written.
  written = err;
  for (; vcount > 0; vbufs++, vcount--) {
    // Slice
    if (vbufs[0].len > written) {
      vbufs[0].base += written;
      vbufs[0].len -= written;
      written = 0;
      break;

    // Discard
    } else {
      written -= vbufs[0].len;
    }
  }

  *bufs = vbufs;
  *count = vcount;

  return 0;
}


int LibuvStreamWrap::DoWrite(WriteWrap* req_wrap,
                             uv_buf_t* bufs,
                             size_t count,
                             uv_stream_t* send_handle) {
  LibuvWriteWrap* w = static_cast<LibuvWriteWrap*>(req_wrap);
  return w->Dispatch(uv_write2,
                     stream(),
                     bufs,
                     count,
                     send_handle,
                     AfterUvWrite);
}



void LibuvStreamWrap::AfterUvWrite(uv_write_t* req, int status) {
  LibuvWriteWrap* req_wrap = static_cast<LibuvWriteWrap*>(
      LibuvWriteWrap::from_req(req));
  CHECK_NOT_NULL(req_wrap);
  HandleScope scope(req_wrap->env()->isolate());
  Context::Scope context_scope(req_wrap->env()->context());
  req_wrap->Done(status);
}

}  // namespace node

NODE_MODULE_CONTEXT_AWARE_INTERNAL(stream_wrap,
                                   node::LibuvStreamWrap::Initialize)
NODE_MODULE_EXTERNAL_REFERENCE(
    stream_wrap, node::LibuvStreamWrap::RegisterExternalReferences)


Generated by: GCOVR (Version 4.2)

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::JustVoid;
50			using v8::Local;
51			using v8::Maybe;
52			using v8::MaybeLocal;
53			using v8::Nothing;
54			using v8::Object;
55			using v8::PropertyAttribute;
56			using v8::ReadOnly;
57			using v8::Signature;
58			using v8::Value;
59
60		122285	void IsConstructCallCallback(const FunctionCallbackInfo<Value>& args) {
61	✗✓	122285	CHECK(args.IsConstructCall());
62		122285	StreamReq::ResetObject(args.This());
63		122285	}
64
65		1301	void LibuvStreamWrap::Initialize(Local<Object> target,
66			Local<Value> unused,
67			Local<Context> context,
68			void* priv) {
69		1301	Environment* env = Environment::GetCurrent(context);
70
71			Local<FunctionTemplate> sw =
72		1301	FunctionTemplate::New(env->isolate(), IsConstructCallCallback);
73		2602	sw->InstanceTemplate()->SetInternalFieldCount(StreamReq::kInternalFieldCount);
74
75			// we need to set handle and callback to null,
76			// so that those fields are created and functions
77			// do not become megamorphic
78			// Fields:
79			// - oncomplete
80			// - callback
81			// - handle
82		5204	sw->InstanceTemplate()->Set(
83			env->oncomplete_string(),
84			v8::Null(env->isolate()));
85		5204	sw->InstanceTemplate()->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "callback"),
86			v8::Null(env->isolate()));
87		5204	sw->InstanceTemplate()->Set(FIXED_ONE_BYTE_STRING(env->isolate(), "handle"),
88			v8::Null(env->isolate()));
89
90		1301	sw->Inherit(AsyncWrap::GetConstructorTemplate(env));
91
92		1301	env->SetConstructorFunction(target, "ShutdownWrap", sw);
93		1301	env->set_shutdown_wrap_template(sw->InstanceTemplate());
94
95			Local<FunctionTemplate> ww =
96		1301	FunctionTemplate::New(env->isolate(), IsConstructCallCallback);
97		2602	ww->InstanceTemplate()->SetInternalFieldCount(
98			StreamReq::kInternalFieldCount);
99		1301	ww->Inherit(AsyncWrap::GetConstructorTemplate(env));
100		1301	env->SetConstructorFunction(target, "WriteWrap", ww);
101		1301	env->set_write_wrap_template(ww->InstanceTemplate());
102
103		3903	NODE_DEFINE_CONSTANT(target, kReadBytesOrError);
104		3903	NODE_DEFINE_CONSTANT(target, kArrayBufferOffset);
105		3903	NODE_DEFINE_CONSTANT(target, kBytesWritten);
106		3903	NODE_DEFINE_CONSTANT(target, kLastWriteWasAsync);
107		1301	target->Set(context, FIXED_ONE_BYTE_STRING(env->isolate(), "streamBaseState"),
108		3903	env->stream_base_state().GetJSArray()).Check();
109		1301	}
110
111		5270	void LibuvStreamWrap::RegisterExternalReferences(
112			ExternalReferenceRegistry* registry) {
113		5270	registry->Register(IsConstructCallCallback);
114		5270	registry->Register(GetWriteQueueSize);
115		5270	registry->Register(SetBlocking);
116		5270	StreamBase::RegisterExternalReferences(registry);
117		5270	}
118
119		18785	LibuvStreamWrap::LibuvStreamWrap(Environment* env,
120			Local<Object> object,
121			uv_stream_t* stream,
122		18785	AsyncWrap::ProviderType provider)
123			: HandleWrap(env,
124			object,
125			reinterpret_cast<uv_handle_t*>(stream),
126			provider),
127			StreamBase(env),
128		18785	stream_(stream) {
129		18785	StreamBase::AttachToObject(object);
130		18785	}
131
132
133		18294	Local<FunctionTemplate> LibuvStreamWrap::GetConstructorTemplate(
134			Environment* env) {
135		18294	Local<FunctionTemplate> tmpl = env->libuv_stream_wrap_ctor_template();
136	✓✓	18294	if (tmpl.IsEmpty()) {
137		6530	tmpl = env->NewFunctionTemplate(nullptr);
138		6530	tmpl->SetClassName(
139			FIXED_ONE_BYTE_STRING(env->isolate(), "LibuvStreamWrap"));
140		6530	tmpl->Inherit(HandleWrap::GetConstructorTemplate(env));
141		13060	tmpl->InstanceTemplate()->SetInternalFieldCount(
142			StreamBase::kInternalFieldCount);
143			Local<FunctionTemplate> get_write_queue_size =
144			FunctionTemplate::New(env->isolate(),
145			GetWriteQueueSize,
146			Local<Value>(),
147		6530	Signature::New(env->isolate(), tmpl));
148		26120	tmpl->PrototypeTemplate()->SetAccessorProperty(
149			env->write_queue_size_string(),
150			get_write_queue_size,
151			Local<FunctionTemplate>(),
152			static_cast<PropertyAttribute>(ReadOnly \| DontDelete));
153		6530	env->SetProtoMethod(tmpl, "setBlocking", SetBlocking);
154		6530	StreamBase::AddMethods(env, tmpl);
155		6530	env->set_libuv_stream_wrap_ctor_template(tmpl);
156			}
157		18294	return tmpl;
158			}
159
160
161		3959	LibuvStreamWrap* LibuvStreamWrap::From(Environment* env, Local<Object> object) {
162		3959	Local<FunctionTemplate> sw = env->libuv_stream_wrap_ctor_template();
163	✓✗✗✓ ✗✓	7918	CHECK(!sw.IsEmpty() && sw->HasInstance(object));
164		3959	return Unwrap<LibuvStreamWrap>(object);
165			}
166
167
168		120	int LibuvStreamWrap::GetFD() {
169			#ifdef _WIN32
170			return fd_;
171			#else
172		120	int fd = -1;
173	✓✗	120	if (stream() != nullptr)
174		120	uv_fileno(reinterpret_cast<uv_handle_t*>(stream()), &fd);
175		120	return fd;
176			#endif
177			}
178
179
180		120210	bool LibuvStreamWrap::IsAlive() {
181		120210	return HandleWrap::IsAlive(this);
182			}
183
184
185		3	bool LibuvStreamWrap::IsClosing() {
186		3	return uv_is_closing(reinterpret_cast<uv_handle_t*>(stream()));
187			}
188
189
190		162217	AsyncWrap* LibuvStreamWrap::GetAsyncWrap() {
191		162217	return static_cast<AsyncWrap*>(this);
192			}
193
194
195		27714	bool LibuvStreamWrap::IsIPCPipe() {
196		27714	return is_named_pipe_ipc();
197			}
198
199		21865	int LibuvStreamWrap::ReadStart() {
200		43730	return uv_read_start(
201			stream(),
202		71758	[](uv_handle_t* handle, size_t suggested_size, uv_buf_t* buf) {
203		71758	static_cast<LibuvStreamWrap*>(handle->data)
204		71758	->OnUvAlloc(suggested_size, buf);
205		71758	},
206		71994	[](uv_stream_t* stream, ssize_t nread, const uv_buf_t* buf) {
207		71994	LibuvStreamWrap* wrap = static_cast<LibuvStreamWrap*>(stream->data);
208		143870	TryCatchScope try_catch(wrap->env());
209		71994	try_catch.SetVerbose(true);
210		71994	wrap->OnUvRead(nread, buf);
211		21865	});
212			}
213
214
215		9269	int LibuvStreamWrap::ReadStop() {
216		9269	return uv_read_stop(stream());
217			}
218
219
220		71758	void LibuvStreamWrap::OnUvAlloc(size_t suggested_size, uv_buf_t* buf) {
221		143516	HandleScope scope(env()->isolate());
222		71758	Context::Scope context_scope(env()->context());
223
224		71758	*buf = EmitAlloc(suggested_size);
225		71758	}
226
227			template <class WrapType>
228		328	static MaybeLocal<Object> AcceptHandle(Environment* env,
229			LibuvStreamWrap* parent) {
230			static_assert(std::is_base_of<LibuvStreamWrap, WrapType>::value \|\|
231			std::is_base_of<UDPWrap, WrapType>::value,
232			"Can only accept stream handles");
233
234		328	EscapableHandleScope scope(env->isolate());
235			Local<Object> wrap_obj;
236
237	✗✓	656	if (!WrapType::Instantiate(env, parent, WrapType::SOCKET).ToLocal(&wrap_obj))
238			return Local<Object>();
239
240		328	HandleWrap* wrap = Unwrap<HandleWrap>(wrap_obj);
241	✗✓	328	CHECK_NOT_NULL(wrap);
242		328	uv_stream_t* stream = reinterpret_cast<uv_stream_t*>(wrap->GetHandle());
243	✗✓	328	CHECK_NOT_NULL(stream);
244
245	✗✓	328	if (uv_accept(parent->stream(), stream))
246			ABORT();
247
248		328	return scope.Escape(wrap_obj);
249			}
250
251		71994	Maybe<void> LibuvStreamWrap::OnUvRead(ssize_t nread, const uv_buf_t* buf) {
252		143870	HandleScope scope(env()->isolate());
253		71994	Context::Scope context_scope(env()->context());
254		71994	uv_handle_type type = UV_UNKNOWN_HANDLE;
255
256	✓✓✓✓ ✓✓	75591	if (is_named_pipe_ipc() &&
257		3597	uv_pipe_pending_count(reinterpret_cast<uv_pipe_t*>(stream())) > 0) {
258		164	type = uv_pipe_pending_type(reinterpret_cast<uv_pipe_t*>(stream()));
259			}
260
261			// We should not be getting this callback if someone has already called
262			// uv_close() on the handle.
263	✗✓	71994	CHECK_EQ(persistent().IsEmpty(), false);
264
265	✓✓	71994	if (nread > 0) {
266			MaybeLocal<Object> pending_obj;
267
268	✓✓	66080	if (type == UV_TCP) {
269		130	pending_obj = AcceptHandle<TCPWrap>(env(), this);
270	✓✓	65950	} else if (type == UV_NAMED_PIPE) {
271		1	pending_obj = AcceptHandle<PipeWrap>(env(), this);
272	✓✓	65949	} else if (type == UV_UDP) {
273		33	pending_obj = AcceptHandle<UDPWrap>(env(), this);
274			} else {
275	✗✓	65916	CHECK_EQ(type, UV_UNKNOWN_HANDLE);
276			}
277
278			Local<Object> local_pending_obj;
279	✓✓	66244	if (type != UV_UNKNOWN_HANDLE &&
280	✓✗	164	(!pending_obj.ToLocal(&local_pending_obj) \|\|
281		164	object()
282		66080	->Set(env()->context(),
283			env()->pending_handle_string(),
284	✗✓	66408	local_pending_obj)
285	✗✓	164	.IsNothing())) {
286			return Nothing<void>();
287			}
288			}
289
290		71994	EmitRead(nread, *buf);
291		71876	return JustVoid();
292			}
293
294		5437	void LibuvStreamWrap::GetWriteQueueSize(
295			const FunctionCallbackInfo<Value>& info) {
296			LibuvStreamWrap* wrap;
297	✗✓	5437	ASSIGN_OR_RETURN_UNWRAP(&wrap, info.This());
298
299	✗✓	5437	if (wrap->stream() == nullptr) {
300			info.GetReturnValue().Set(0);
301			return;
302			}
303
304		5437	uint32_t write_queue_size = wrap->stream()->write_queue_size;
305	✓✗	10874	info.GetReturnValue().Set(write_queue_size);
306			}
307
308
309		32	void LibuvStreamWrap::SetBlocking(const FunctionCallbackInfo<Value>& args) {
310			LibuvStreamWrap* wrap;
311	✗✓	32	ASSIGN_OR_RETURN_UNWRAP(&wrap, args.Holder());
312
313	✗✓	32	CHECK_GT(args.Length(), 0);
314	✗✓	32	if (!wrap->IsAlive())
315			return args.GetReturnValue().Set(UV_EINVAL);
316
317		32	bool enable = args[0]->IsTrue();
318		64	args.GetReturnValue().Set(uv_stream_set_blocking(wrap->stream(), enable));
319			}
320
321			typedef SimpleShutdownWrap<ReqWrap<uv_shutdown_t>> LibuvShutdownWrap;
322			typedef SimpleWriteWrap<ReqWrap<uv_write_t>> LibuvWriteWrap;
323
324		7410	ShutdownWrap* LibuvStreamWrap::CreateShutdownWrap(Local<Object> object) {
325		7410	return new LibuvShutdownWrap(this, object);
326			}
327
328		250	WriteWrap* LibuvStreamWrap::CreateWriteWrap(Local<Object> object) {
329		250	return new LibuvWriteWrap(this, object);
330			}
331
332
333		7410	int LibuvStreamWrap::DoShutdown(ShutdownWrap* req_wrap_) {
334		7410	LibuvShutdownWrap* req_wrap = static_cast<LibuvShutdownWrap*>(req_wrap_);
335		7410	return req_wrap->Dispatch(uv_shutdown, stream(), AfterUvShutdown);
336			}
337
338
339		7407	void LibuvStreamWrap::AfterUvShutdown(uv_shutdown_t* req, int status) {
340	✓✗	7407	LibuvShutdownWrap* req_wrap = static_cast<LibuvShutdownWrap*>(
341		7407	LibuvShutdownWrap::from_req(req));
342	✗✓	7407	CHECK_NOT_NULL(req_wrap);
343		14814	HandleScope scope(req_wrap->env()->isolate());
344		7407	Context::Scope context_scope(req_wrap->env()->context());
345		7407	req_wrap->Done(status);
346		7407	}
347
348
349			// NOTE: Call to this function could change both `buf`'s and `count`'s
350			// values, shifting their base and decrementing their length. This is
351			// required in order to skip the data that was successfully written via
352			// uv_try_write().
353		120647	int LibuvStreamWrap::DoTryWrite(uv_buf_t** bufs, size_t* count) {
354			int err;
355			size_t written;
356		120647	uv_buf_t* vbufs = *bufs;
357		120647	size_t vcount = *count;
358
359		120647	err = uv_try_write(stream(), vbufs, vcount);
360	✓✗✓✓	120647	if (err == UV_ENOSYS \|\| err == UV_EAGAIN)
361		5	return 0;
362	✓✓	120642	if (err < 0)
363		2963	return err;
364
365			// Slice off the buffers: skip all written buffers and slice the one that
366			// was partially written.
367		117679	written = err;
368	✓✓	313192	for (; vcount > 0; vbufs++, vcount--) {
369			// Slice
370	✓✓	195648	if (vbufs[0].len > written) {
371		135	vbufs[0].base += written;
372		135	vbufs[0].len -= written;
373		135	written = 0;
374		135	break;
375
376			// Discard
377			} else {
378		195513	written -= vbufs[0].len;
379			}
380			}
381
382		117679	*bufs = vbufs;
383		117679	*count = vcount;
384
385		117679	return 0;
386			}
387
388
389		250	int LibuvStreamWrap::DoWrite(WriteWrap* req_wrap,
390			uv_buf_t* bufs,
391			size_t count,
392			uv_stream_t* send_handle) {
393		250	LibuvWriteWrap* w = static_cast<LibuvWriteWrap*>(req_wrap);
394		250	return w->Dispatch(uv_write2,
395			stream(),
396			bufs,
397			count,
398			send_handle,
399		250	AfterUvWrite);
400			}
401
402
403
404		249	void LibuvStreamWrap::AfterUvWrite(uv_write_t* req, int status) {
405	✓✗	249	LibuvWriteWrap* req_wrap = static_cast<LibuvWriteWrap*>(
406		249	LibuvWriteWrap::from_req(req));
407	✗✓	249	CHECK_NOT_NULL(req_wrap);
408		497	HandleScope scope(req_wrap->env()->isolate());
409		249	Context::Scope context_scope(req_wrap->env()->context());
410		249	req_wrap->Done(status);
411		248	}
412
413			} // namespace node
414
415		5338	NODE_MODULE_CONTEXT_AWARE_INTERNAL(stream_wrap,
416			node::LibuvStreamWrap::Initialize)
417		5270	NODE_MODULE_EXTERNAL_REFERENCE(
418			stream_wrap, node::LibuvStreamWrap::RegisterExternalReferences)