fs: improve error performance for writeSync

nodejs · Oct 24, 2023 · c6e35e9 · c6e35e9
1 parent 2c4a332
commit c6e35e9
Show file tree

Hide file tree

Showing 4 changed files with 81 additions and 21 deletions.
diff --git a/benchmark/fs/bench-writeSync.js b/benchmark/fs/bench-writeSync.js
@@ -0,0 +1,54 @@
+'use strict';
+
+const common = require('../common');
+const fs = require('fs');
+const assert = require('assert');
+const tmpdir = require('../../test/common/tmpdir');
+tmpdir.refresh();
+
+const path = tmpdir.resolve(`new-file-${process.pid}`);
+const parameters = [Buffer.from('Benchmark data'),
+                    0,
+                    Buffer.byteLength('Benchmark data')];
+const bench = common.createBenchmark(main, {
+  type: ['valid', 'invalid'],
+  n: [1e5],
+});
+
+function main({ n, type }) {
+  let fd;
+  let result;
+
+  switch (type) {
+    case 'valid':
+      fd = fs.openSync(path, 'w');
+
+      bench.start();
+      for (let i = 0; i < n; i++) {
+        result = fs.writeSync(fd, ...parameters);
+      }
+
+      bench.end(n);
+      assert(result);
+      fs.closeSync(fd);
+      break;
+    case 'invalid': {
+      fd = 1 << 30;
+      let hasError = false;
+      bench.start();
+      for (let i = 0; i < n; i++) {
+        try {
+          result = fs.writeSync(fd, ...parameters);
+        } catch {
+          hasError = true;
+        }
+      }
+
+      bench.end(n);
+      assert(hasError);
+      break;
+    }
+    default:
+      throw new Error('Invalid type');
+  }
+}
diff --git a/lib/fs.js b/lib/fs.js
@@ -899,7 +899,6 @@ ObjectDefineProperty(write, kCustomPromisifyArgsSymbol,
  */
 function writeSync(fd, buffer, offsetOrOptions, length, position) {
   fd = getValidatedFd(fd);
-  const ctx = {};
   let result;
 
   let offset = offsetOrOptions;
@@ -921,18 +920,15 @@ function writeSync(fd, buffer, offsetOrOptions, length, position) {
     if (typeof length !== 'number')
       length = buffer.byteLength - offset;
     validateOffsetLengthWrite(offset, length, buffer.byteLength);
-    result = binding.writeBuffer(fd, buffer, offset, length, position,
-                                 undefined, ctx);
+    result = binding.writeBuffer(fd, buffer, offset, length, position);
   } else {
     validateStringAfterArrayBufferView(buffer, 'buffer');
     validateEncoding(buffer, length);
 
     if (offset === undefined)
       offset = null;
-    result = binding.writeString(fd, buffer, offset, length,
-                                 undefined, ctx);
+    result = binding.writeString(fd, buffer, offset, length);
   }
-  handleErrorFromBinding(ctx);
   return result;
 }
 

diff --git a/src/node_file.cc b/src/node_file.cc
@@ -2098,7 +2098,7 @@ static void WriteBuffer(const FunctionCallbackInfo<Value>& args) {
   Environment* env = Environment::GetCurrent(args);
 
   const int argc = args.Length();
-  CHECK_GE(argc, 4);
+  CHECK_GE(argc, 5);
 
   CHECK(args[0]->IsInt32());
   const int fd = args[0].As<Int32>()->Value();
@@ -2125,18 +2125,23 @@ static void WriteBuffer(const FunctionCallbackInfo<Value>& args) {
   char* buf = buffer_data + off;
   uv_buf_t uvbuf = uv_buf_init(buf, len);
 
-  FSReqBase* req_wrap_async = GetReqWrap(args, 5);
-  if (req_wrap_async != nullptr) {  // write(fd, buffer, off, len, pos, req)
+  if (argc > 5) {  // write(fd, buffer, off, len, pos, req)
+    FSReqBase* req_wrap_async = GetReqWrap(args, 5);
+    CHECK_NOT_NULL(req_wrap_async);
     FS_ASYNC_TRACE_BEGIN0(UV_FS_WRITE, req_wrap_async)
     AsyncCall(env, req_wrap_async, args, "write", UTF8, AfterInteger,
               uv_fs_write, fd, &uvbuf, 1, pos);
-  } else {  // write(fd, buffer, off, len, pos, undefined, ctx)
-    CHECK_EQ(argc, 7);
-    FSReqWrapSync req_wrap_sync;
+  } else {  // write(fd, buffer, off, len, pos)
+    FSReqWrapSync req_wrap_sync("write");
     FS_SYNC_TRACE_BEGIN(write);
-    int bytesWritten = SyncCall(env, args[6], &req_wrap_sync, "write",
-                                uv_fs_write, fd, &uvbuf, 1, pos);
+    int bytesWritten = SyncCallAndThrowOnError(
+        env, &req_wrap_sync, uv_fs_write, fd, &uvbuf, 1, pos);
     FS_SYNC_TRACE_END(write, "bytesWritten", bytesWritten);
+
+    if (is_uv_error(bytesWritten)) {
+      return;
+    }
+
     args.GetReturnValue().Set(bytesWritten);
   }
 }
@@ -2273,9 +2278,9 @@ static void WriteString(const FunctionCallbackInfo<Value>& args) {
     } else {
       req_wrap_async->SetReturnValue(args);
     }
-  } else {  // write(fd, string, pos, enc, undefined, ctx)
-    CHECK_EQ(argc, 6);
-    FSReqWrapSync req_wrap_sync;
+  } else {  // write(fd, string, pos, enc)
+    CHECK_EQ(argc, 4);
+    FSReqWrapSync req_wrap_sync("write");
     FSReqBase::FSReqBuffer stack_buffer;
     if (buf == nullptr) {
       if (!StringBytes::StorageSize(isolate, value, enc).To(&len))
@@ -2290,9 +2295,14 @@ static void WriteString(const FunctionCallbackInfo<Value>& args) {
     }
     uv_buf_t uvbuf = uv_buf_init(buf, len);
     FS_SYNC_TRACE_BEGIN(write);
-    int bytesWritten = SyncCall(env, args[5], &req_wrap_sync, "write",
-                                uv_fs_write, fd, &uvbuf, 1, pos);
+    int bytesWritten = SyncCallAndThrowOnError(
+        env, &req_wrap_sync, uv_fs_write, fd, &uvbuf, 1, pos);
     FS_SYNC_TRACE_END(write, "bytesWritten", bytesWritten);
+
+    if (is_uv_error(bytesWritten)) {
+      return;
+    }
+
     args.GetReturnValue().Set(bytesWritten);
   }
 }

diff --git a/typings/internalBinding/fs.d.ts b/typings/internalBinding/fs.d.ts
@@ -219,15 +219,15 @@ declare namespace InternalFSBinding {
   function utimes(path: string, atime: number, mtime: number, usePromises: typeof kUsePromises): Promise<void>;
 
   function writeBuffer(fd: number, buffer: ArrayBufferView, offset: number, length: number, position: number | null, req: FSReqCallback<number>): void;
-  function writeBuffer(fd: number, buffer: ArrayBufferView, offset: number, length: number, position: number | null, req: undefined, ctx: FSSyncContext): number;
+  function writeBuffer(fd: number, buffer: ArrayBufferView, offset: number, length: number, position: number | null): number;
   function writeBuffer(fd: number, buffer: ArrayBufferView, offset: number, length: number, position: number | null, usePromises: typeof kUsePromises): Promise<number>;
 
   function writeBuffers(fd: number, buffers: ArrayBufferView[], position: number, req: FSReqCallback<number>): void;
   function writeBuffers(fd: number, buffers: ArrayBufferView[], position: number, req: undefined, ctx: FSSyncContext): number;
   function writeBuffers(fd: number, buffers: ArrayBufferView[], position: number, usePromises: typeof kUsePromises): Promise<number>;
 
   function writeString(fd: number, value: string, pos: unknown, encoding: unknown, req: FSReqCallback<number>): void;
-  function writeString(fd: number, value: string, pos: unknown, encoding: unknown, req: undefined, ctx: FSSyncContext): number;
+  function writeString(fd: number, value: string, pos: unknown, encoding: unknown): number;
   function writeString(fd: number, value: string, pos: unknown, encoding: unknown, usePromises: typeof kUsePromises): Promise<number>;
 
   function getFormatOfExtensionlessFile(url: string): ConstantsBinding['fs'];