Head

GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	node_dir.cc	Lines:	171	195	87.7 %
Date:	2022-09-22 04:22:24	Branches:	68	128	53.1 %


#include "node_dir.h"
#include "node_external_reference.h"
#include "node_file-inl.h"
#include "node_process-inl.h"
#include "memory_tracker-inl.h"
#include "util.h"

#include "tracing/trace_event.h"

#include "string_bytes.h"

#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <cstring>
#include <cerrno>
#include <climits>

#include <memory>

namespace node {

namespace fs_dir {

using fs::FSReqAfterScope;
using fs::FSReqBase;
using fs::FSReqWrapSync;
using fs::GetReqWrap;

using v8::Array;
using v8::Context;
using v8::FunctionCallbackInfo;
using v8::FunctionTemplate;
using v8::HandleScope;
using v8::Integer;
using v8::Isolate;
using v8::Local;
using v8::MaybeLocal;
using v8::Null;
using v8::Number;
using v8::Object;
using v8::ObjectTemplate;
using v8::Value;

static const char* get_dir_func_name_by_type(uv_fs_type req_type) {
  switch (req_type) {
#define FS_TYPE_TO_NAME(type, name)                                            \
  case UV_FS_##type:                                                           \
    return name;
    FS_TYPE_TO_NAME(OPENDIR, "opendir")
    FS_TYPE_TO_NAME(READDIR, "readdir")
    FS_TYPE_TO_NAME(CLOSEDIR, "closedir")
#undef FS_TYPE_TO_NAME
    default:
      return "unknow";
  }
}

#define TRACE_NAME(name) "fs_dir.sync." #name
#define GET_TRACE_ENABLED                                                      \
  (*TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED(                                \
       TRACING_CATEGORY_NODE2(fs_dir, sync)) != 0)
#define FS_DIR_SYNC_TRACE_BEGIN(syscall, ...)                                  \
  if (GET_TRACE_ENABLED)                                                       \
    TRACE_EVENT_BEGIN(TRACING_CATEGORY_NODE2(fs_dir, sync),                    \
                      TRACE_NAME(syscall),                                     \
                      ##__VA_ARGS__);
#define FS_DIR_SYNC_TRACE_END(syscall, ...)                                    \
  if (GET_TRACE_ENABLED)                                                       \
    TRACE_EVENT_END(TRACING_CATEGORY_NODE2(fs_dir, sync),                      \
                    TRACE_NAME(syscall),                                       \
                    ##__VA_ARGS__);

#define FS_DIR_ASYNC_TRACE_BEGIN0(fs_type, id)                                 \
  TRACE_EVENT_NESTABLE_ASYNC_BEGIN0(TRACING_CATEGORY_NODE2(fs_dir, async),     \
                                    get_dir_func_name_by_type(fs_type),        \
                                    id);
#define FS_DIR_ASYNC_TRACE_END0(fs_type, id)                                   \
  TRACE_EVENT_NESTABLE_ASYNC_END0(TRACING_CATEGORY_NODE2(fs_dir, async),       \
                                  get_dir_func_name_by_type(fs_type),          \
                                  id);

#define FS_DIR_ASYNC_TRACE_BEGIN1(fs_type, id, name, value)                    \
  TRACE_EVENT_NESTABLE_ASYNC_BEGIN1(TRACING_CATEGORY_NODE2(fs_dir, async),     \
                                    get_dir_func_name_by_type(fs_type),        \
                                    id,                                        \
                                    name,                                      \
                                    value);

#define FS_DIR_ASYNC_TRACE_END1(fs_type, id, name, value)                      \
  TRACE_EVENT_NESTABLE_ASYNC_END1(TRACING_CATEGORY_NODE2(fs_dir, async),       \
                                  get_dir_func_name_by_type(fs_type),          \
                                  id,                                          \
                                  name,                                        \
                                  value);

DirHandle::DirHandle(Environment* env, Local<Object> obj, uv_dir_t* dir)
    : AsyncWrap(env, obj, AsyncWrap::PROVIDER_DIRHANDLE),
      dir_(dir) {
  MakeWeak();

  dir_->nentries = 0;
  dir_->dirents = nullptr;
}

DirHandle* DirHandle::New(Environment* env, uv_dir_t* dir) {
  Local<Object> obj;
  if (!env->dir_instance_template()
          ->NewInstance(env->context())
          .ToLocal(&obj)) {
    return nullptr;
  }

  return new DirHandle(env, obj, dir);
}

void DirHandle::New(const FunctionCallbackInfo<Value>& args) {
  CHECK(args.IsConstructCall());
}

DirHandle::~DirHandle() {
  CHECK(!closing_);  // We should not be deleting while explicitly closing!
  GCClose();         // Close synchronously and emit warning
  CHECK(closed_);    // We have to be closed at the point
}

void DirHandle::MemoryInfo(MemoryTracker* tracker) const {
  tracker->TrackFieldWithSize("dir", sizeof(*dir_));
}

// Close the directory handle if it hasn't already been closed. A process
// warning will be emitted using a SetImmediate to avoid calling back to
// JS during GC. If closing the fd fails at this point, a fatal exception
// will crash the process immediately.
inline void DirHandle::GCClose() {
  if (closed_) return;
  uv_fs_t req;
  int ret = uv_fs_closedir(nullptr, &req, dir_, nullptr);
  uv_fs_req_cleanup(&req);
  closing_ = false;
  closed_ = true;

  struct err_detail { int ret; };

  err_detail detail { ret };

  if (ret < 0) {
    // Do not unref this
    env()->SetImmediate([detail](Environment* env) {
      const char* msg = "Closing directory handle on garbage collection failed";
      // This exception will end up being fatal for the process because
      // it is being thrown from within the SetImmediate handler and
      // there is no JS stack to bubble it to. In other words, tearing
      // down the process is the only reasonable thing we can do here.
      HandleScope handle_scope(env->isolate());
      env->ThrowUVException(detail.ret, "close", msg);
    });
    return;
  }

  // If the close was successful, we still want to emit a process warning
  // to notify that the file descriptor was gc'd. We want to be noisy about
  // this because not explicitly closing the DirHandle is a bug.

  env()->SetImmediate([](Environment* env) {
    ProcessEmitWarning(env,
                       "Closing directory handle on garbage collection");
  }, CallbackFlags::kUnrefed);
}

void AfterClose(uv_fs_t* req) {
  FSReqBase* req_wrap = FSReqBase::from_req(req);
  FSReqAfterScope after(req_wrap, req);
  FS_DIR_ASYNC_TRACE_END1(
      req->fs_type, req_wrap, "result", static_cast<int>(req->result))
  if (after.Proceed())
    req_wrap->Resolve(Undefined(req_wrap->env()->isolate()));
}

void DirHandle::Close(const FunctionCallbackInfo<Value>& args) {
  Environment* env = Environment::GetCurrent(args);

  const int argc = args.Length();
  CHECK_GE(argc, 1);

  DirHandle* dir;
  ASSIGN_OR_RETURN_UNWRAP(&dir, args.Holder());

  dir->closing_ = false;
  dir->closed_ = true;

  FSReqBase* req_wrap_async = GetReqWrap(args, 0);
  if (req_wrap_async != nullptr) {  // close(req)
    FS_DIR_ASYNC_TRACE_BEGIN0(UV_FS_CLOSEDIR, req_wrap_async)
    AsyncCall(env, req_wrap_async, args, "closedir", UTF8, AfterClose,
              uv_fs_closedir, dir->dir());
  } else {  // close(undefined, ctx)
    CHECK_EQ(argc, 2);
    FSReqWrapSync req_wrap_sync;
    FS_DIR_SYNC_TRACE_BEGIN(closedir);
    SyncCall(env, args[1], &req_wrap_sync, "closedir", uv_fs_closedir,
             dir->dir());
    FS_DIR_SYNC_TRACE_END(closedir);
  }
}

static MaybeLocal<Array> DirentListToArray(
    Environment* env,
    uv_dirent_t* ents,
    int num,
    enum encoding encoding,
    Local<Value>* err_out) {
  MaybeStackBuffer<Local<Value>, 64> entries(num * 2);

  // Return an array of all read filenames.
  int j = 0;
  for (int i = 0; i < num; i++) {
    Local<Value> filename;
    Local<Value> error;
    const size_t namelen = strlen(ents[i].name);
    if (!StringBytes::Encode(env->isolate(),
                             ents[i].name,
                             namelen,
                             encoding,
                             &error).ToLocal(&filename)) {
      *err_out = error;
      return MaybeLocal<Array>();
    }

    entries[j++] = filename;
    entries[j++] = Integer::New(env->isolate(), ents[i].type);
  }

  return Array::New(env->isolate(), entries.out(), j);
}

static void AfterDirRead(uv_fs_t* req) {
  BaseObjectPtr<FSReqBase> req_wrap { FSReqBase::from_req(req) };
  FSReqAfterScope after(req_wrap.get(), req);
  FS_DIR_ASYNC_TRACE_END1(
      req->fs_type, req_wrap, "result", static_cast<int>(req->result))
  if (!after.Proceed()) {
    return;
  }

  Environment* env = req_wrap->env();
  Isolate* isolate = env->isolate();

  if (req->result == 0) {
    // Done
    Local<Value> done = Null(isolate);
    after.Clear();
    req_wrap->Resolve(done);
    return;
  }

  uv_dir_t* dir = static_cast<uv_dir_t*>(req->ptr);

  Local<Value> error;
  Local<Array> js_array;
  if (!DirentListToArray(env,
                         dir->dirents,
                         static_cast<int>(req->result),
                         req_wrap->encoding(),
                         &error)
           .ToLocal(&js_array)) {
    // Clear libuv resources *before* delivering results to JS land because
    // that can schedule another operation on the same uv_dir_t. Ditto below.
    after.Clear();
    return req_wrap->Reject(error);
  }

  after.Clear();
  req_wrap->Resolve(js_array);
}


void DirHandle::Read(const FunctionCallbackInfo<Value>& args) {
  Environment* env = Environment::GetCurrent(args);
  Isolate* isolate = env->isolate();

  const int argc = args.Length();
  CHECK_GE(argc, 3);

  const enum encoding encoding = ParseEncoding(isolate, args[0], UTF8);

  DirHandle* dir;
  ASSIGN_OR_RETURN_UNWRAP(&dir, args.Holder());

  CHECK(args[1]->IsNumber());
  uint64_t buffer_size = static_cast<uint64_t>(args[1].As<Number>()->Value());

  if (buffer_size != dir->dirents_.size()) {
    dir->dirents_.resize(buffer_size);
    dir->dir_->nentries = buffer_size;
    dir->dir_->dirents = dir->dirents_.data();
  }

  FSReqBase* req_wrap_async = GetReqWrap(args, 2);
  if (req_wrap_async != nullptr) {  // dir.read(encoding, bufferSize, req)
    FS_DIR_ASYNC_TRACE_BEGIN0(UV_FS_READDIR, req_wrap_async)
    AsyncCall(env, req_wrap_async, args, "readdir", encoding,
              AfterDirRead, uv_fs_readdir, dir->dir());
  } else {  // dir.read(encoding, bufferSize, undefined, ctx)
    CHECK_EQ(argc, 4);
    FSReqWrapSync req_wrap_sync;
    FS_DIR_SYNC_TRACE_BEGIN(readdir);
    int err = SyncCall(env, args[3], &req_wrap_sync, "readdir", uv_fs_readdir,
                       dir->dir());
    FS_DIR_SYNC_TRACE_END(readdir);
    if (err < 0) {
      return;  // syscall failed, no need to continue, error info is in ctx
    }

    if (req_wrap_sync.req.result == 0) {
      // Done
      Local<Value> done = Null(isolate);
      args.GetReturnValue().Set(done);
      return;
    }

    CHECK_GE(req_wrap_sync.req.result, 0);

    Local<Value> error;
    Local<Array> js_array;
    if (!DirentListToArray(env,
                           dir->dir()->dirents,
                           static_cast<int>(req_wrap_sync.req.result),
                           encoding,
                           &error)
             .ToLocal(&js_array)) {
      Local<Object> ctx = args[2].As<Object>();
      USE(ctx->Set(env->context(), env->error_string(), error));
      return;
    }

    args.GetReturnValue().Set(js_array);
  }
}

void AfterOpenDir(uv_fs_t* req) {
  FSReqBase* req_wrap = FSReqBase::from_req(req);
  FSReqAfterScope after(req_wrap, req);
  FS_DIR_ASYNC_TRACE_END1(
      req->fs_type, req_wrap, "result", static_cast<int>(req->result))
  if (!after.Proceed()) {
    return;
  }

  Environment* env = req_wrap->env();

  uv_dir_t* dir = static_cast<uv_dir_t*>(req->ptr);
  DirHandle* handle = DirHandle::New(env, dir);

  req_wrap->Resolve(handle->object().As<Value>());
}

static void OpenDir(const FunctionCallbackInfo<Value>& args) {
  Environment* env = Environment::GetCurrent(args);
  Isolate* isolate = env->isolate();

  const int argc = args.Length();
  CHECK_GE(argc, 3);

  BufferValue path(isolate, args[0]);
  CHECK_NOT_NULL(*path);

  const enum encoding encoding = ParseEncoding(isolate, args[1], UTF8);

  FSReqBase* req_wrap_async = GetReqWrap(args, 2);
  if (req_wrap_async != nullptr) {  // openDir(path, encoding, req)
    FS_DIR_ASYNC_TRACE_BEGIN1(
        UV_FS_OPENDIR, req_wrap_async, "path", TRACE_STR_COPY(*path))
    AsyncCall(env, req_wrap_async, args, "opendir", encoding, AfterOpenDir,
              uv_fs_opendir, *path);
  } else {  // openDir(path, encoding, undefined, ctx)
    CHECK_EQ(argc, 4);
    FSReqWrapSync req_wrap_sync;
    FS_DIR_SYNC_TRACE_BEGIN(opendir);
    int result = SyncCall(env, args[3], &req_wrap_sync, "opendir",
                          uv_fs_opendir, *path);
    FS_DIR_SYNC_TRACE_END(opendir);
    if (result < 0) {
      return;  // syscall failed, no need to continue, error info is in ctx
    }

    uv_fs_t* req = &req_wrap_sync.req;
    uv_dir_t* dir = static_cast<uv_dir_t*>(req->ptr);
    DirHandle* handle = DirHandle::New(env, dir);

    args.GetReturnValue().Set(handle->object().As<Value>());
  }
}

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

  SetMethod(context, target, "opendir", OpenDir);

  // Create FunctionTemplate for DirHandle
  Local<FunctionTemplate> dir = NewFunctionTemplate(isolate, DirHandle::New);
  dir->Inherit(AsyncWrap::GetConstructorTemplate(env));
  SetProtoMethod(isolate, dir, "read", DirHandle::Read);
  SetProtoMethod(isolate, dir, "close", DirHandle::Close);
  Local<ObjectTemplate> dirt = dir->InstanceTemplate();
  dirt->SetInternalFieldCount(DirHandle::kInternalFieldCount);
  SetConstructorFunction(context, target, "DirHandle", dir);
  env->set_dir_instance_template(dirt);
}

void RegisterExternalReferences(ExternalReferenceRegistry* registry) {
  registry->Register(OpenDir);
  registry->Register(DirHandle::New);
  registry->Register(DirHandle::Read);
  registry->Register(DirHandle::Close);
}

}  // namespace fs_dir

}  // end namespace node

NODE_MODULE_CONTEXT_AWARE_INTERNAL(fs_dir, node::fs_dir::Initialize)
NODE_MODULE_EXTERNAL_REFERENCE(fs_dir, node::fs_dir::RegisterExternalReferences)


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			#include "node_dir.h"
2			#include "node_external_reference.h"
3			#include "node_file-inl.h"
4			#include "node_process-inl.h"
5			#include "memory_tracker-inl.h"
6			#include "util.h"
7
8			#include "tracing/trace_event.h"
9
10			#include "string_bytes.h"
11
12			#include <fcntl.h>
13			#include <sys/types.h>
14			#include <sys/stat.h>
15			#include <cstring>
16			#include <cerrno>
17			#include <climits>
18
19			#include <memory>
20
21			namespace node {
22
23			namespace fs_dir {
24
25			using fs::FSReqAfterScope;
26			using fs::FSReqBase;
27			using fs::FSReqWrapSync;
28			using fs::GetReqWrap;
29
30			using v8::Array;
31			using v8::Context;
32			using v8::FunctionCallbackInfo;
33			using v8::FunctionTemplate;
34			using v8::HandleScope;
35			using v8::Integer;
36			using v8::Isolate;
37			using v8::Local;
38			using v8::MaybeLocal;
39			using v8::Null;
40			using v8::Number;
41			using v8::Object;
42			using v8::ObjectTemplate;
43			using v8::Value;
44
45		2	static const char* get_dir_func_name_by_type(uv_fs_type req_type) {
46	✓✗✗✗	2	switch (req_type) {
47			#define FS_TYPE_TO_NAME(type, name) \
48			case UV_FS_##type: \
49			return name;
50		2	FS_TYPE_TO_NAME(OPENDIR, "opendir")
51			FS_TYPE_TO_NAME(READDIR, "readdir")
52			FS_TYPE_TO_NAME(CLOSEDIR, "closedir")
53			#undef FS_TYPE_TO_NAME
54			default:
55			return "unknow";
56			}
57			}
58
59			#define TRACE_NAME(name) "fs_dir.sync." #name
60			#define GET_TRACE_ENABLED \
61			(*TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED( \
62			TRACING_CATEGORY_NODE2(fs_dir, sync)) != 0)
63			#define FS_DIR_SYNC_TRACE_BEGIN(syscall, ...) \
64			if (GET_TRACE_ENABLED) \
65			TRACE_EVENT_BEGIN(TRACING_CATEGORY_NODE2(fs_dir, sync), \
66			TRACE_NAME(syscall), \
67			##__VA_ARGS__);
68			#define FS_DIR_SYNC_TRACE_END(syscall, ...) \
69			if (GET_TRACE_ENABLED) \
70			TRACE_EVENT_END(TRACING_CATEGORY_NODE2(fs_dir, sync), \
71			TRACE_NAME(syscall), \
72			##__VA_ARGS__);
73
74			#define FS_DIR_ASYNC_TRACE_BEGIN0(fs_type, id) \
75			TRACE_EVENT_NESTABLE_ASYNC_BEGIN0(TRACING_CATEGORY_NODE2(fs_dir, async), \
76			get_dir_func_name_by_type(fs_type), \
77			id);
78			#define FS_DIR_ASYNC_TRACE_END0(fs_type, id) \
79			TRACE_EVENT_NESTABLE_ASYNC_END0(TRACING_CATEGORY_NODE2(fs_dir, async), \
80			get_dir_func_name_by_type(fs_type), \
81			id);
82
83			#define FS_DIR_ASYNC_TRACE_BEGIN1(fs_type, id, name, value) \
84			TRACE_EVENT_NESTABLE_ASYNC_BEGIN1(TRACING_CATEGORY_NODE2(fs_dir, async), \
85			get_dir_func_name_by_type(fs_type), \
86			id, \
87			name, \
88			value);
89
90			#define FS_DIR_ASYNC_TRACE_END1(fs_type, id, name, value) \
91			TRACE_EVENT_NESTABLE_ASYNC_END1(TRACING_CATEGORY_NODE2(fs_dir, async), \
92			get_dir_func_name_by_type(fs_type), \
93			id, \
94			name, \
95			value);
96
97		179	DirHandle::DirHandle(Environment* env, Local<Object> obj, uv_dir_t* dir)
98			: AsyncWrap(env, obj, AsyncWrap::PROVIDER_DIRHANDLE),
99		179	dir_(dir) {
100		179	MakeWeak();
101
102		179	dir_->nentries = 0;
103		179	dir_->dirents = nullptr;
104		179	}
105
106		179	DirHandle* DirHandle::New(Environment* env, uv_dir_t* dir) {
107			Local<Object> obj;
108		179	if (!env->dir_instance_template()
109		179	->NewInstance(env->context())
110	✗✓	179	.ToLocal(&obj)) {
111			return nullptr;
112			}
113
114		179	return new DirHandle(env, obj, dir);
115			}
116
117			void DirHandle::New(const FunctionCallbackInfo<Value>& args) {
118			CHECK(args.IsConstructCall());
119			}
120
121		716	DirHandle::~DirHandle() {
122	✗✓	358	CHECK(!closing_); // We should not be deleting while explicitly closing!
123		358	GCClose(); // Close synchronously and emit warning
124	✗✓	358	CHECK(closed_); // We have to be closed at the point
125		716	}
126
127			void DirHandle::MemoryInfo(MemoryTracker* tracker) const {
128			tracker->TrackFieldWithSize("dir", sizeof(*dir_));
129			}
130
131			// Close the directory handle if it hasn't already been closed. A process
132			// warning will be emitted using a SetImmediate to avoid calling back to
133			// JS during GC. If closing the fd fails at this point, a fatal exception
134			// will crash the process immediately.
135		179	inline void DirHandle::GCClose() {
136	✓✓	179	if (closed_) return;
137			uv_fs_t req;
138		13	int ret = uv_fs_closedir(nullptr, &req, dir_, nullptr);
139		13	uv_fs_req_cleanup(&req);
140		13	closing_ = false;
141		13	closed_ = true;
142
143			struct err_detail { int ret; };
144
145		13	err_detail detail { ret };
146
147	✗✓	13	if (ret < 0) {
148			// Do not unref this
149			env()->SetImmediate([detail](Environment* env) {
150			const char* msg = "Closing directory handle on garbage collection failed";
151			// This exception will end up being fatal for the process because
152			// it is being thrown from within the SetImmediate handler and
153			// there is no JS stack to bubble it to. In other words, tearing
154			// down the process is the only reasonable thing we can do here.
155			HandleScope handle_scope(env->isolate());
156			env->ThrowUVException(detail.ret, "close", msg);
157			});
158			return;
159			}
160
161			// If the close was successful, we still want to emit a process warning
162			// to notify that the file descriptor was gc'd. We want to be noisy about
163			// this because not explicitly closing the DirHandle is a bug.
164
165		13	env()->SetImmediate([](Environment* env) {
166			ProcessEmitWarning(env,
167		1	"Closing directory handle on garbage collection");
168		1	}, CallbackFlags::kUnrefed);
169			}
170
171		82	void AfterClose(uv_fs_t* req) {
172		82	FSReqBase* req_wrap = FSReqBase::from_req(req);
173		164	FSReqAfterScope after(req_wrap, req);
174	✓✓✗✓	87	FS_DIR_ASYNC_TRACE_END1(
175			req->fs_type, req_wrap, "result", static_cast<int>(req->result))
176	✓✗	82	if (after.Proceed())
177		164	req_wrap->Resolve(Undefined(req_wrap->env()->isolate()));
178		82	}
179
180		166	void DirHandle::Close(const FunctionCallbackInfo<Value>& args) {
181		166	Environment* env = Environment::GetCurrent(args);
182
183		166	const int argc = args.Length();
184	✗✓	166	CHECK_GE(argc, 1);
185
186			DirHandle* dir;
187	✗✓	166	ASSIGN_OR_RETURN_UNWRAP(&dir, args.Holder());
188
189		166	dir->closing_ = false;
190		166	dir->closed_ = true;
191
192		166	FSReqBase* req_wrap_async = GetReqWrap(args, 0);
193	✓✓	166	if (req_wrap_async != nullptr) { // close(req)
194	✓✓✗✓	87	FS_DIR_ASYNC_TRACE_BEGIN0(UV_FS_CLOSEDIR, req_wrap_async)
195		82	AsyncCall(env, req_wrap_async, args, "closedir", UTF8, AfterClose,
196			uv_fs_closedir, dir->dir());
197			} else { // close(undefined, ctx)
198	✗✓	84	CHECK_EQ(argc, 2);
199		168	FSReqWrapSync req_wrap_sync;
200	✗✓✗✗ ✗✗	84	FS_DIR_SYNC_TRACE_BEGIN(closedir);
201		168	SyncCall(env, args[1], &req_wrap_sync, "closedir", uv_fs_closedir,
202			dir->dir());
203	✗✓✗✗ ✗✗	84	FS_DIR_SYNC_TRACE_END(closedir);
204			}
205			}
206
207		155	static MaybeLocal<Array> DirentListToArray(
208			Environment* env,
209			uv_dirent_t* ents,
210			int num,
211			enum encoding encoding,
212			Local<Value>* err_out) {
213		310	MaybeStackBuffer<Local<Value>, 64> entries(num * 2);
214
215			// Return an array of all read filenames.
216		155	int j = 0;
217	✓✓	650	for (int i = 0; i < num; i++) {
218			Local<Value> filename;
219			Local<Value> error;
220		495	const size_t namelen = strlen(ents[i].name);
221		495	if (!StringBytes::Encode(env->isolate(),
222		495	ents[i].name,
223			namelen,
224			encoding,
225	✗✓	990	&error).ToLocal(&filename)) {
226			*err_out = error;
227			return MaybeLocal<Array>();
228			}
229
230		495	entries[j++] = filename;
231		990	entries[j++] = Integer::New(env->isolate(), ents[i].type);
232			}
233
234		310	return Array::New(env->isolate(), entries.out(), j);
235			}
236
237		144	static void AfterDirRead(uv_fs_t* req) {
238		144	BaseObjectPtr<FSReqBase> req_wrap { FSReqBase::from_req(req) };
239		144	FSReqAfterScope after(req_wrap.get(), req);
240	✓✓✗✓	149	FS_DIR_ASYNC_TRACE_END1(
241			req->fs_type, req_wrap, "result", static_cast<int>(req->result))
242	✗✓	144	if (!after.Proceed()) {
243			return;
244			}
245
246		144	Environment* env = req_wrap->env();
247		144	Isolate* isolate = env->isolate();
248
249	✓✓	144	if (req->result == 0) {
250			// Done
251		64	Local<Value> done = Null(isolate);
252		64	after.Clear();
253		64	req_wrap->Resolve(done);
254		64	return;
255			}
256
257		80	uv_dir_t* dir = static_cast<uv_dir_t*>(req->ptr);
258
259			Local<Value> error;
260			Local<Array> js_array;
261		80	if (!DirentListToArray(env,
262			dir->dirents,
263		80	static_cast<int>(req->result),
264			req_wrap->encoding(),
265		80	&error)
266	✗✓	80	.ToLocal(&js_array)) {
267			// Clear libuv resources before delivering results to JS land because
268			// that can schedule another operation on the same uv_dir_t. Ditto below.
269			after.Clear();
270			return req_wrap->Reject(error);
271			}
272
273		80	after.Clear();
274		80	req_wrap->Resolve(js_array);
275			}
276
277
278		291	void DirHandle::Read(const FunctionCallbackInfo<Value>& args) {
279		291	Environment* env = Environment::GetCurrent(args);
280		291	Isolate* isolate = env->isolate();
281
282		291	const int argc = args.Length();
283	✗✓	291	CHECK_GE(argc, 3);
284
285		291	const enum encoding encoding = ParseEncoding(isolate, args[0], UTF8);
286
287			DirHandle* dir;
288	✗✓	363	ASSIGN_OR_RETURN_UNWRAP(&dir, args.Holder());
289
290	✗✓	291	CHECK(args[1]->IsNumber());
291		582	uint64_t buffer_size = static_cast<uint64_t>(args[1].As<Number>()->Value());
292
293	✓✓	291	if (buffer_size != dir->dirents_.size()) {
294		163	dir->dirents_.resize(buffer_size);
295		163	dir->dir_->nentries = buffer_size;
296		163	dir->dir_->dirents = dir->dirents_.data();
297			}
298
299		291	FSReqBase* req_wrap_async = GetReqWrap(args, 2);
300	✓✓	291	if (req_wrap_async != nullptr) { // dir.read(encoding, bufferSize, req)
301	✓✓✗✓	149	FS_DIR_ASYNC_TRACE_BEGIN0(UV_FS_READDIR, req_wrap_async)
302		144	AsyncCall(env, req_wrap_async, args, "readdir", encoding,
303			AfterDirRead, uv_fs_readdir, dir->dir());
304			} else { // dir.read(encoding, bufferSize, undefined, ctx)
305	✗✓	147	CHECK_EQ(argc, 4);
306		147	FSReqWrapSync req_wrap_sync;
307	✗✓✗✗ ✗✗	147	FS_DIR_SYNC_TRACE_BEGIN(readdir);
308		294	int err = SyncCall(env, args[3], &req_wrap_sync, "readdir", uv_fs_readdir,
309			dir->dir());
310	✗✓✗✗ ✗✗	147	FS_DIR_SYNC_TRACE_END(readdir);
311	✗✓	147	if (err < 0) {
312			return; // syscall failed, no need to continue, error info is in ctx
313			}
314
315	✓✓	147	if (req_wrap_sync.req.result == 0) {
316			// Done
317		72	Local<Value> done = Null(isolate);
318		72	args.GetReturnValue().Set(done);
319		72	return;
320			}
321
322	✗✓	75	CHECK_GE(req_wrap_sync.req.result, 0);
323
324			Local<Value> error;
325			Local<Array> js_array;
326		75	if (!DirentListToArray(env,
327		75	dir->dir()->dirents,
328		75	static_cast<int>(req_wrap_sync.req.result),
329			encoding,
330		75	&error)
331	✗✓	75	.ToLocal(&js_array)) {
332			Local<Object> ctx = args[2].As<Object>();
333			USE(ctx->Set(env->context(), env->error_string(), error));
334			return;
335			}
336
337		150	args.GetReturnValue().Set(js_array);
338			}
339			}
340
341		86	void AfterOpenDir(uv_fs_t* req) {
342		86	FSReqBase* req_wrap = FSReqBase::from_req(req);
343		86	FSReqAfterScope after(req_wrap, req);
344	✓✓✓✓	92	FS_DIR_ASYNC_TRACE_END1(
345			req->fs_type, req_wrap, "result", static_cast<int>(req->result))
346	✓✓	86	if (!after.Proceed()) {
347		1	return;
348			}
349
350		85	Environment* env = req_wrap->env();
351
352		85	uv_dir_t* dir = static_cast<uv_dir_t*>(req->ptr);
353		85	DirHandle* handle = DirHandle::New(env, dir);
354
355		170	req_wrap->Resolve(handle->object().As<Value>());
356			}
357
358		181	static void OpenDir(const FunctionCallbackInfo<Value>& args) {
359		181	Environment* env = Environment::GetCurrent(args);
360		181	Isolate* isolate = env->isolate();
361
362		181	const int argc = args.Length();
363	✗✓	181	CHECK_GE(argc, 3);
364
365		181	BufferValue path(isolate, args[0]);
366	✗✓	181	CHECK_NOT_NULL(*path);
367
368		181	const enum encoding encoding = ParseEncoding(isolate, args[1], UTF8);
369
370		181	FSReqBase* req_wrap_async = GetReqWrap(args, 2);
371	✓✓	181	if (req_wrap_async != nullptr) { // openDir(path, encoding, req)
372	✓✓✓✓	92	FS_DIR_ASYNC_TRACE_BEGIN1(
373			UV_FS_OPENDIR, req_wrap_async, "path", TRACE_STR_COPY(*path))
374		86	AsyncCall(env, req_wrap_async, args, "opendir", encoding, AfterOpenDir,
375			uv_fs_opendir, *path);
376			} else { // openDir(path, encoding, undefined, ctx)
377	✗✓	95	CHECK_EQ(argc, 4);
378		95	FSReqWrapSync req_wrap_sync;
379	✗✓✗✗ ✗✗	95	FS_DIR_SYNC_TRACE_BEGIN(opendir);
380		190	int result = SyncCall(env, args[3], &req_wrap_sync, "opendir",
381			uv_fs_opendir, *path);
382	✗✓✗✗ ✗✗	95	FS_DIR_SYNC_TRACE_END(opendir);
383	✓✓	95	if (result < 0) {
384		1	return; // syscall failed, no need to continue, error info is in ctx
385			}
386
387		94	uv_fs_t* req = &req_wrap_sync.req;
388		94	uv_dir_t* dir = static_cast<uv_dir_t*>(req->ptr);
389		94	DirHandle* handle = DirHandle::New(env, dir);
390
391		188	args.GetReturnValue().Set(handle->object().As<Value>());
392			}
393			}
394
395		789	void Initialize(Local<Object> target,
396			Local<Value> unused,
397			Local<Context> context,
398			void* priv) {
399		789	Environment* env = Environment::GetCurrent(context);
400		789	Isolate* isolate = env->isolate();
401
402		789	SetMethod(context, target, "opendir", OpenDir);
403
404			// Create FunctionTemplate for DirHandle
405		789	Local<FunctionTemplate> dir = NewFunctionTemplate(isolate, DirHandle::New);
406		789	dir->Inherit(AsyncWrap::GetConstructorTemplate(env));
407		789	SetProtoMethod(isolate, dir, "read", DirHandle::Read);
408		789	SetProtoMethod(isolate, dir, "close", DirHandle::Close);
409		789	Local<ObjectTemplate> dirt = dir->InstanceTemplate();
410		789	dirt->SetInternalFieldCount(DirHandle::kInternalFieldCount);
411		789	SetConstructorFunction(context, target, "DirHandle", dir);
412		789	env->set_dir_instance_template(dirt);
413		789	}
414
415		5527	void RegisterExternalReferences(ExternalReferenceRegistry* registry) {
416		5527	registry->Register(OpenDir);
417		5527	registry->Register(DirHandle::New);
418		5527	registry->Register(DirHandle::Read);
419		5527	registry->Register(DirHandle::Close);
420		5527	}
421
422			} // namespace fs_dir
423
424			} // end namespace node
425
426		5597	NODE_MODULE_CONTEXT_AWARE_INTERNAL(fs_dir, node::fs_dir::Initialize)
427		5527	NODE_MODULE_EXTERNAL_REFERENCE(fs_dir, node::fs_dir::RegisterExternalReferences)