GCC Code Coverage Report
Directory: ../ Exec Total Coverage
File: /home/iojs/build/workspace/node-test-commit-linux-coverage-daily/nodes/benchmark/out/../src/spawn_sync.cc Lines: 491 542 90.6 %
Date: 2020-09-03 22:13:26 Branches: 203 310 65.5 %

Line Branch Exec Source
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// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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#include "spawn_sync.h"
23
#include "debug_utils-inl.h"
24
#include "env-inl.h"
25
#include "node_internals.h"
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#include "string_bytes.h"
27
#include "util-inl.h"
28
29
#include <cstring>
30
31
32
namespace node {
33
34
using v8::Array;
35
using v8::Context;
36
using v8::EscapableHandleScope;
37
using v8::FunctionCallbackInfo;
38
using v8::HandleScope;
39
using v8::Int32;
40
using v8::Integer;
41
using v8::Isolate;
42
using v8::Just;
43
using v8::Local;
44
using v8::Maybe;
45
using v8::MaybeLocal;
46
using v8::Nothing;
47
using v8::Null;
48
using v8::Number;
49
using v8::Object;
50
using v8::String;
51
using v8::Value;
52
53
22178
void SyncProcessOutputBuffer::OnAlloc(size_t suggested_size,
54
                                      uv_buf_t* buf) const {
55
22178
  if (used() == kBufferSize)
56
    *buf = uv_buf_init(nullptr, 0);
57
  else
58
22178
    *buf = uv_buf_init(data_ + used(), available());
59
22178
}
60
61
62
21257
void SyncProcessOutputBuffer::OnRead(const uv_buf_t* buf, size_t nread) {
63
  // If we hand out the same chunk twice, this should catch it.
64
21257
  CHECK_EQ(buf->base, data_ + used());
65
21257
  used_ += static_cast<unsigned int>(nread);
66
21257
}
67
68
69
1151
size_t SyncProcessOutputBuffer::Copy(char* dest) const {
70
1151
  memcpy(dest, data_, used());
71
1151
  return used();
72
}
73
74
75
43396
unsigned int SyncProcessOutputBuffer::available() const {
76
43396
  return sizeof data_ - used();
77
}
78
79
80
112462
unsigned int SyncProcessOutputBuffer::used() const {
81
112462
  return used_;
82
}
83
84
85
3453
SyncProcessOutputBuffer* SyncProcessOutputBuffer::next() const {
86
3453
  return next_;
87
}
88
89
90
191
void SyncProcessOutputBuffer::set_next(SyncProcessOutputBuffer* next) {
91
191
  next_ = next;
92
191
}
93
94
95
1892
SyncProcessStdioPipe::SyncProcessStdioPipe(SyncProcessRunner* process_handler,
96
                                           bool readable,
97
                                           bool writable,
98
1892
                                           uv_buf_t input_buffer)
99
    : process_handler_(process_handler),
100
      readable_(readable),
101
      writable_(writable),
102
      input_buffer_(input_buffer),
103
104
      first_output_buffer_(nullptr),
105
      last_output_buffer_(nullptr),
106
107
      uv_pipe_(),
108
      write_req_(),
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      shutdown_req_(),
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111
1892
      lifecycle_(kUninitialized) {
112

1892
  CHECK(readable || writable);
113
1892
}
114
115
116
3784
SyncProcessStdioPipe::~SyncProcessStdioPipe() {
117

1892
  CHECK(lifecycle_ == kUninitialized || lifecycle_ == kClosed);
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119
  SyncProcessOutputBuffer* buf;
120
  SyncProcessOutputBuffer* next;
121
122
3043
  for (buf = first_output_buffer_; buf != nullptr; buf = next) {
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1151
    next = buf->next();
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1151
    delete buf;
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  }
126
1892
}
127
128
129
1892
int SyncProcessStdioPipe::Initialize(uv_loop_t* loop) {
130
1892
  CHECK_EQ(lifecycle_, kUninitialized);
131
132
1892
  int r = uv_pipe_init(loop, uv_pipe(), 0);
133
1892
  if (r < 0)
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    return r;
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136
1892
  uv_pipe()->data = this;
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138
1892
  lifecycle_ = kInitialized;
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1892
  return 0;
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}
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1457
int SyncProcessStdioPipe::Start() {
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1457
  CHECK_EQ(lifecycle_, kInitialized);
145
146
  // Set the busy flag already. If this function fails no recovery is
147
  // possible.
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1457
  lifecycle_ = kStarted;
149
150
1457
  if (readable()) {
151
479
    if (input_buffer_.len > 0) {
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22
      CHECK_NOT_NULL(input_buffer_.base);
153
154
22
      int r = uv_write(&write_req_,
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                       uv_stream(),
156
22
                       &input_buffer_,
157
                       1,
158
22
                       WriteCallback);
159
22
      if (r < 0)
160
        return r;
161
    }
162
163
479
    int r = uv_shutdown(&shutdown_req_, uv_stream(), ShutdownCallback);
164
479
    if (r < 0)
165
      return r;
166
  }
167
168
1457
  if (writable()) {
169
978
    int r = uv_read_start(uv_stream(), AllocCallback, ReadCallback);
170
978
    if (r < 0)
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      return r;
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  }
173
174
1457
  return 0;
175
}
176
177
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1892
void SyncProcessStdioPipe::Close() {
179

1892
  CHECK(lifecycle_ == kInitialized || lifecycle_ == kStarted);
180
181
1892
  uv_close(uv_handle(), CloseCallback);
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183
1892
  lifecycle_ = kClosing;
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1892
}
185
186
187
978
Local<Object> SyncProcessStdioPipe::GetOutputAsBuffer(Environment* env) const {
188
978
  size_t length = OutputLength();
189
1956
  Local<Object> js_buffer = Buffer::New(env, length).ToLocalChecked();
190
978
  CopyOutput(Buffer::Data(js_buffer));
191
978
  return js_buffer;
192
}
193
194
195
3349
bool SyncProcessStdioPipe::readable() const {
196
3349
  return readable_;
197
}
198
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200
4806
bool SyncProcessStdioPipe::writable() const {
201
4806
  return writable_;
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}
203
204
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1892
uv_stdio_flags SyncProcessStdioPipe::uv_flags() const {
206
  unsigned int flags;
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208
1892
  flags = UV_CREATE_PIPE;
209
1892
  if (readable())
210
624
    flags |= UV_READABLE_PIPE;
211
1892
  if (writable())
212
1268
    flags |= UV_WRITABLE_PIPE;
213
214
1892
  return static_cast<uv_stdio_flags>(flags);
215
}
216
217
218
9047
uv_pipe_t* SyncProcessStdioPipe::uv_pipe() const {
219
9047
  CHECK_LT(lifecycle_, kClosing);
220
9047
  return &uv_pipe_;
221
}
222
223
224
3371
uv_stream_t* SyncProcessStdioPipe::uv_stream() const {
225
3371
  return reinterpret_cast<uv_stream_t*>(uv_pipe());
226
}
227
228
229
1892
uv_handle_t* SyncProcessStdioPipe::uv_handle() const {
230
1892
  return reinterpret_cast<uv_handle_t*>(uv_pipe());
231
}
232
233
234
978
size_t SyncProcessStdioPipe::OutputLength() const {
235
  SyncProcessOutputBuffer* buf;
236
978
  size_t size = 0;
237
238
2129
  for (buf = first_output_buffer_; buf != nullptr; buf = buf->next())
239
1151
    size += buf->used();
240
241
978
  return size;
242
}
243
244
245
978
void SyncProcessStdioPipe::CopyOutput(char* dest) const {
246
  SyncProcessOutputBuffer* buf;
247
978
  size_t offset = 0;
248
249
2129
  for (buf = first_output_buffer_; buf != nullptr; buf = buf->next())
250
1151
    offset += buf->Copy(dest + offset);
251
978
}
252
253
254
22178
void SyncProcessStdioPipe::OnAlloc(size_t suggested_size, uv_buf_t* buf) {
255
  // This function assumes that libuv will never allocate two buffers for the
256
  // same stream at the same time. There's an assert in
257
  // SyncProcessOutputBuffer::OnRead that would fail if this assumption was
258
  // ever violated.
259
260
22178
  if (last_output_buffer_ == nullptr) {
261
    // Allocate the first capture buffer.
262
960
    first_output_buffer_ = new SyncProcessOutputBuffer();
263
960
    last_output_buffer_ = first_output_buffer_;
264
265
21218
  } else if (last_output_buffer_->available() == 0) {
266
    // The current capture buffer is full so get us a new one.
267
191
    SyncProcessOutputBuffer* buf = new SyncProcessOutputBuffer();
268
191
    last_output_buffer_->set_next(buf);
269
191
    last_output_buffer_ = buf;
270
  }
271
272
22178
  last_output_buffer_->OnAlloc(suggested_size, buf);
273
22178
}
274
275
276
22209
void SyncProcessStdioPipe::OnRead(const uv_buf_t* buf, ssize_t nread) {
277
22209
  if (nread == UV_EOF) {
278
    // Libuv implicitly stops reading on EOF.
279
280
21257
  } else if (nread < 0) {
281
    SetError(static_cast<int>(nread));
282
    // At some point libuv should really implicitly stop reading on error.
283
    uv_read_stop(uv_stream());
284
285
  } else {
286
21257
    last_output_buffer_->OnRead(buf, nread);
287
21257
    process_handler_->IncrementBufferSizeAndCheckOverflow(nread);
288
  }
289
22209
}
290
291
292
22
void SyncProcessStdioPipe::OnWriteDone(int result) {
293
22
  if (result < 0)
294
    SetError(result);
295
22
}
296
297
298
479
void SyncProcessStdioPipe::OnShutdownDone(int result) {
299
479
  if (result < 0)
300
    SetError(result);
301
479
}
302
303
304
1892
void SyncProcessStdioPipe::OnClose() {
305
1892
  lifecycle_ = kClosed;
306
1892
}
307
308
309
void SyncProcessStdioPipe::SetError(int error) {
310
  CHECK_NE(error, 0);
311
  process_handler_->SetPipeError(error);
312
}
313
314
315
22178
void SyncProcessStdioPipe::AllocCallback(uv_handle_t* handle,
316
                                         size_t suggested_size,
317
                                         uv_buf_t* buf) {
318
  SyncProcessStdioPipe* self =
319
22178
      reinterpret_cast<SyncProcessStdioPipe*>(handle->data);
320
22178
  self->OnAlloc(suggested_size, buf);
321
22178
}
322
323
324
22209
void SyncProcessStdioPipe::ReadCallback(uv_stream_t* stream,
325
                                        ssize_t nread,
326
                                        const uv_buf_t* buf) {
327
  SyncProcessStdioPipe* self =
328
22209
        reinterpret_cast<SyncProcessStdioPipe*>(stream->data);
329
22209
  self->OnRead(buf, nread);
330
22209
}
331
332
333
22
void SyncProcessStdioPipe::WriteCallback(uv_write_t* req, int result) {
334
  SyncProcessStdioPipe* self =
335
22
      reinterpret_cast<SyncProcessStdioPipe*>(req->handle->data);
336
22
  self->OnWriteDone(result);
337
22
}
338
339
340
479
void SyncProcessStdioPipe::ShutdownCallback(uv_shutdown_t* req, int result) {
341
  SyncProcessStdioPipe* self =
342
479
      reinterpret_cast<SyncProcessStdioPipe*>(req->handle->data);
343
344
  // On AIX, OS X and the BSDs, calling shutdown() on one end of a pipe
345
  // when the other end has closed the connection fails with ENOTCONN.
346
  // Libuv is not the right place to handle that because it can't tell
347
  // if the error is genuine but we here can.
348
479
  if (result == UV_ENOTCONN)
349
    result = 0;
350
351
479
  self->OnShutdownDone(result);
352
479
}
353
354
355
1892
void SyncProcessStdioPipe::CloseCallback(uv_handle_t* handle) {
356
  SyncProcessStdioPipe* self =
357
1892
      reinterpret_cast<SyncProcessStdioPipe*>(handle->data);
358
1892
  self->OnClose();
359
1892
}
360
361
362
3928
void SyncProcessRunner::Initialize(Local<Object> target,
363
                                   Local<Value> unused,
364
                                   Local<Context> context,
365
                                   void* priv) {
366
3928
  Environment* env = Environment::GetCurrent(context);
367
3928
  env->SetMethod(target, "spawn", Spawn);
368
3928
}
369
370
371
658
void SyncProcessRunner::Spawn(const FunctionCallbackInfo<Value>& args) {
372
658
  Environment* env = Environment::GetCurrent(args);
373
658
  env->PrintSyncTrace();
374
1316
  SyncProcessRunner p(env);
375
  Local<Value> result;
376
1316
  if (!p.Run(args[0]).ToLocal(&result)) return;
377
1316
  args.GetReturnValue().Set(result);
378
}
379
380
381
658
SyncProcessRunner::SyncProcessRunner(Environment* env)
382
    : max_buffer_(0),
383
      timeout_(0),
384
      kill_signal_(SIGTERM),
385
386
      uv_loop_(nullptr),
387
388
      stdio_count_(0),
389
      uv_stdio_containers_(nullptr),
390
      stdio_pipes_initialized_(false),
391
392
      uv_process_options_(),
393
      file_buffer_(nullptr),
394
      args_buffer_(nullptr),
395
      env_buffer_(nullptr),
396
      cwd_buffer_(nullptr),
397
398
      uv_process_(),
399
      killed_(false),
400
401
      buffered_output_size_(0),
402
      exit_status_(-1),
403
      term_signal_(-1),
404
405
      uv_timer_(),
406
      kill_timer_initialized_(false),
407
408
      error_(0),
409
      pipe_error_(0),
410
411
      lifecycle_(kUninitialized),
412
413
658
      env_(env) {
414
658
}
415
416
417
1316
SyncProcessRunner::~SyncProcessRunner() {
418
658
  CHECK_EQ(lifecycle_, kHandlesClosed);
419
420
658
  stdio_pipes_.clear();
421
658
  delete[] file_buffer_;
422
658
  delete[] args_buffer_;
423
658
  delete[] cwd_buffer_;
424
658
  delete[] env_buffer_;
425
658
  delete[] uv_stdio_containers_;
426
658
}
427
428
429
39274
Environment* SyncProcessRunner::env() const {
430
39274
  return env_;
431
}
432
433
658
MaybeLocal<Object> SyncProcessRunner::Run(Local<Value> options) {
434
658
  EscapableHandleScope scope(env()->isolate());
435
436
658
  CHECK_EQ(lifecycle_, kUninitialized);
437
438
658
  Maybe<bool> r = TryInitializeAndRunLoop(options);
439
658
  CloseHandlesAndDeleteLoop();
440
658
  if (r.IsNothing()) return MaybeLocal<Object>();
441
442
658
  Local<Object> result = BuildResultObject();
443
444
658
  return scope.Escape(result);
445
}
446
447
658
Maybe<bool> SyncProcessRunner::TryInitializeAndRunLoop(Local<Value> options) {
448
  int r;
449
450
  // There is no recovery from failure inside TryInitializeAndRunLoop - the
451
  // only option we'd have is to close all handles and destroy the loop.
452
658
  CHECK_EQ(lifecycle_, kUninitialized);
453
658
  lifecycle_ = kInitialized;
454
455
658
  uv_loop_ = new uv_loop_t;
456
658
  if (uv_loop_ == nullptr) {
457
    SetError(UV_ENOMEM);
458
    return Just(false);
459
  }
460
461
658
  r = uv_loop_init(uv_loop_);
462
658
  if (r < 0) {
463
    delete uv_loop_;
464
    uv_loop_ = nullptr;
465
    SetError(r);
466
    return Just(false);
467
  }
468
469
1316
  if (!ParseOptions(options).To(&r)) return Nothing<bool>();
470
471
658
  if (r < 0) {
472
    SetError(r);
473
    return Just(false);
474
  }
475
476
658
  if (timeout_ > 0) {
477
7
    r = uv_timer_init(uv_loop_, &uv_timer_);
478
7
    if (r < 0) {
479
      SetError(r);
480
      return Just(false);
481
    }
482
483
7
    uv_unref(reinterpret_cast<uv_handle_t*>(&uv_timer_));
484
485
7
    uv_timer_.data = this;
486
7
    kill_timer_initialized_ = true;
487
488
    // Start the timer immediately. If uv_spawn fails then
489
    // CloseHandlesAndDeleteLoop() will immediately close the timer handle
490
    // which implicitly stops it, so there is no risk that the timeout callback
491
    // runs when the process didn't start.
492
7
    r = uv_timer_start(&uv_timer_, KillTimerCallback, timeout_, 0);
493
7
    if (r < 0) {
494
      SetError(r);
495
      return Just(false);
496
    }
497
  }
498
499
658
  uv_process_options_.exit_cb = ExitCallback;
500
658
  r = uv_spawn(uv_loop_, &uv_process_, &uv_process_options_);
501
658
  if (r < 0) {
502
145
    SetError(r);
503
145
    return Just(false);
504
  }
505
513
  uv_process_.data = this;
506
507
2052
  for (const auto& pipe : stdio_pipes_) {
508
1539
    if (pipe != nullptr) {
509
1457
      r = pipe->Start();
510
1457
      if (r < 0) {
511
        SetPipeError(r);
512
        return Just(false);
513
      }
514
    }
515
  }
516
517
513
  r = uv_run(uv_loop_, UV_RUN_DEFAULT);
518
513
  if (r < 0)
519
    // We can't handle uv_run failure.
520
    ABORT();
521
522
  // If we get here the process should have exited.
523
513
  CHECK_GE(exit_status_, 0);
524
513
  return Just(true);
525
}
526
527
528
658
void SyncProcessRunner::CloseHandlesAndDeleteLoop() {
529
658
  CHECK_LT(lifecycle_, kHandlesClosed);
530
531
658
  if (uv_loop_ != nullptr) {
532
658
    CloseStdioPipes();
533
658
    CloseKillTimer();
534
    // Close the process handle when ExitCallback was not called.
535
    uv_handle_t* uv_process_handle =
536
658
        reinterpret_cast<uv_handle_t*>(&uv_process_);
537
538
    // Close the process handle if it is still open. The handle type also
539
    // needs to be checked because TryInitializeAndRunLoop() won't spawn a
540
    // process if input validation fails.
541

1316
    if (uv_process_handle->type == UV_PROCESS &&
542
658
        !uv_is_closing(uv_process_handle))
543
145
      uv_close(uv_process_handle, nullptr);
544
545
    // Give closing watchers a chance to finish closing and get their close
546
    // callbacks called.
547
658
    int r = uv_run(uv_loop_, UV_RUN_DEFAULT);
548
658
    if (r < 0)
549
      ABORT();
550
551
658
    CheckedUvLoopClose(uv_loop_);
552
658
    delete uv_loop_;
553
658
    uv_loop_ = nullptr;
554
555
  } else {
556
    // If the loop doesn't exist, neither should any pipes or timers.
557
    CHECK_EQ(false, stdio_pipes_initialized_);
558
    CHECK_EQ(false, kill_timer_initialized_);
559
  }
560
561
658
  lifecycle_ = kHandlesClosed;
562
658
}
563
564
565
671
void SyncProcessRunner::CloseStdioPipes() {
566
671
  CHECK_LT(lifecycle_, kHandlesClosed);
567
568
671
  if (stdio_pipes_initialized_) {
569
658
    CHECK(!stdio_pipes_.empty());
570
658
    CHECK_NOT_NULL(uv_loop_);
571
572
2632
    for (const auto& pipe : stdio_pipes_) {
573
1974
      if (pipe)
574
1892
        pipe->Close();
575
    }
576
577
658
    stdio_pipes_initialized_ = false;
578
  }
579
671
}
580
581
582
671
void SyncProcessRunner::CloseKillTimer() {
583
671
  CHECK_LT(lifecycle_, kHandlesClosed);
584
585
671
  if (kill_timer_initialized_) {
586
7
    CHECK_GT(timeout_, 0);
587
7
    CHECK_NOT_NULL(uv_loop_);
588
589
7
    uv_handle_t* uv_timer_handle = reinterpret_cast<uv_handle_t*>(&uv_timer_);
590
7
    uv_ref(uv_timer_handle);
591
7
    uv_close(uv_timer_handle, KillTimerCloseCallback);
592
593
7
    kill_timer_initialized_ = false;
594
  }
595
671
}
596
597
598
13
void SyncProcessRunner::Kill() {
599
  // Only attempt to kill once.
600
13
  if (killed_)
601
    return;
602
13
  killed_ = true;
603
604
  // We might get here even if the process we spawned has already exited. This
605
  // could happen when our child process spawned another process which
606
  // inherited (one of) the stdio pipes. In this case we won't attempt to send
607
  // a signal to the process, however we will still close our end of the stdio
608
  // pipes so this situation won't make us hang.
609
13
  if (exit_status_ < 0) {
610
13
    int r = uv_process_kill(&uv_process_, kill_signal_);
611
612
    // If uv_kill failed with an error that isn't ESRCH, the user probably
613
    // specified an invalid or unsupported signal. Signal this to the user as
614
    // and error and kill the process with SIGKILL instead.
615

13
    if (r < 0 && r != UV_ESRCH) {
616
      SetError(r);
617
618
      // Deliberately ignore the return value, we might not have
619
      // sufficient privileges to signal the child process.
620
      USE(uv_process_kill(&uv_process_, SIGKILL));
621
    }
622
  }
623
624
  // Close all stdio pipes.
625
13
  CloseStdioPipes();
626
627
  // Stop the timeout timer immediately.
628
13
  CloseKillTimer();
629
}
630
631
632
21257
void SyncProcessRunner::IncrementBufferSizeAndCheckOverflow(ssize_t length) {
633
21257
  buffered_output_size_ += length;
634
635

21257
  if (max_buffer_ > 0 && buffered_output_size_ > max_buffer_) {
636
8
    SetError(UV_ENOBUFS);
637
8
    Kill();
638
  }
639
21257
}
640
641
642
513
void SyncProcessRunner::OnExit(int64_t exit_status, int term_signal) {
643
513
  if (exit_status < 0)
644
    return SetError(static_cast<int>(exit_status));
645
646
513
  exit_status_ = exit_status;
647
513
  term_signal_ = term_signal;
648
}
649
650
651
5
void SyncProcessRunner::OnKillTimerTimeout() {
652
5
  SetError(UV_ETIMEDOUT);
653
5
  Kill();
654
5
}
655
656
657
816
int SyncProcessRunner::GetError() {
658
816
  if (error_ != 0)
659
316
    return error_;
660
  else
661
500
    return pipe_error_;
662
}
663
664
665
158
void SyncProcessRunner::SetError(int error) {
666
158
  if (error_ == 0)
667
158
    error_ = error;
668
158
}
669
670
671
void SyncProcessRunner::SetPipeError(int pipe_error) {
672
  if (pipe_error_ == 0)
673
    pipe_error_ = pipe_error;
674
}
675
676
677
658
Local<Object> SyncProcessRunner::BuildResultObject() {
678
658
  EscapableHandleScope scope(env()->isolate());
679
658
  Local<Context> context = env()->context();
680
681
658
  Local<Object> js_result = Object::New(env()->isolate());
682
683
658
  if (GetError() != 0) {
684
316
    js_result->Set(context, env()->error_string(),
685
632
                   Integer::New(env()->isolate(), GetError())).Check();
686
  }
687
688
658
  if (exit_status_ >= 0) {
689
513
    if (term_signal_ > 0) {
690
60
      js_result->Set(context, env()->status_string(),
691
120
                     Null(env()->isolate())).Check();
692
    } else {
693
966
      js_result->Set(context, env()->status_string(),
694
                     Number::New(env()->isolate(),
695
1932
                                 static_cast<double>(exit_status_))).Check();
696
    }
697
  } else {
698
    // If exit_status_ < 0 the process was never started because of some error.
699
290
    js_result->Set(context, env()->status_string(),
700
580
                   Null(env()->isolate())).Check();
701
  }
702
703
658
  if (term_signal_ > 0)
704
60
    js_result->Set(context, env()->signal_string(),
705
60
                   String::NewFromUtf8(env()->isolate(),
706
30
                                       signo_string(term_signal_))
707
90
                       .ToLocalChecked())
708
        .Check();
709
  else
710
1256
    js_result->Set(context, env()->signal_string(),
711
2512
                   Null(env()->isolate())).Check();
712
713
658
  if (exit_status_ >= 0)
714
1026
    js_result->Set(context, env()->output_string(),
715
2052
                   BuildOutputArray()).Check();
716
  else
717
290
    js_result->Set(context, env()->output_string(),
718
580
                   Null(env()->isolate())).Check();
719
720
1316
  js_result->Set(context, env()->pid_string(),
721
2632
                 Number::New(env()->isolate(), uv_process_.pid)).Check();
722
723
658
  return scope.Escape(js_result);
724
}
725
726
727
513
Local<Array> SyncProcessRunner::BuildOutputArray() {
728
513
  CHECK_GE(lifecycle_, kInitialized);
729
513
  CHECK(!stdio_pipes_.empty());
730
731
513
  EscapableHandleScope scope(env()->isolate());
732
1026
  MaybeStackBuffer<Local<Value>, 8> js_output(stdio_pipes_.size());
733
734
2052
  for (uint32_t i = 0; i < stdio_pipes_.size(); i++) {
735
1539
    SyncProcessStdioPipe* h = stdio_pipes_[i].get();
736

1539
    if (h != nullptr && h->writable())
737
1956
      js_output[i] = h->GetOutputAsBuffer(env());
738
    else
739
1122
      js_output[i] = Null(env()->isolate());
740
  }
741
742
  return scope.Escape(
743
1026
      Array::New(env()->isolate(), js_output.out(), js_output.length()));
744
}
745
746
658
Maybe<int> SyncProcessRunner::ParseOptions(Local<Value> js_value) {
747
658
  Isolate* isolate = env()->isolate();
748
1316
  HandleScope scope(isolate);
749
  int r;
750
751
658
  if (!js_value->IsObject()) return Just<int>(UV_EINVAL);
752
753
658
  Local<Context> context = env()->context();
754
658
  Local<Object> js_options = js_value.As<Object>();
755
756
  Local<Value> js_file =
757
1974
      js_options->Get(context, env()->file_string()).ToLocalChecked();
758
1316
  if (!CopyJsString(js_file, &file_buffer_).To(&r)) return Nothing<int>();
759
658
  if (r < 0) return Just(r);
760
658
  uv_process_options_.file = file_buffer_;
761
762
  Local<Value> js_args =
763
1974
      js_options->Get(context, env()->args_string()).ToLocalChecked();
764
1316
  if (!CopyJsStringArray(js_args, &args_buffer_).To(&r)) return Nothing<int>();
765
658
  if (r < 0) return Just(r);
766
658
  uv_process_options_.args = reinterpret_cast<char**>(args_buffer_);
767
768
  Local<Value> js_cwd =
769
1974
      js_options->Get(context, env()->cwd_string()).ToLocalChecked();
770
658
  if (IsSet(js_cwd)) {
771
200
    if (!CopyJsString(js_cwd, &cwd_buffer_).To(&r)) return Nothing<int>();
772
100
    if (r < 0) return Just(r);
773
100
    uv_process_options_.cwd = cwd_buffer_;
774
  }
775
776
  Local<Value> js_env_pairs =
777
1974
      js_options->Get(context, env()->env_pairs_string()).ToLocalChecked();
778
658
  if (IsSet(js_env_pairs)) {
779
1316
    if (!CopyJsStringArray(js_env_pairs, &env_buffer_).To(&r))
780
      return Nothing<int>();
781
658
    if (r < 0) return Just(r);
782
783
658
    uv_process_options_.env = reinterpret_cast<char**>(env_buffer_);
784
  }
785
  Local<Value> js_uid =
786
1974
      js_options->Get(context, env()->uid_string()).ToLocalChecked();
787
658
  if (IsSet(js_uid)) {
788
1
    CHECK(js_uid->IsInt32());
789
2
    const int32_t uid = js_uid.As<Int32>()->Value();
790
1
    uv_process_options_.uid = static_cast<uv_uid_t>(uid);
791
1
    uv_process_options_.flags |= UV_PROCESS_SETUID;
792
  }
793
794
  Local<Value> js_gid =
795
1974
      js_options->Get(context, env()->gid_string()).ToLocalChecked();
796
658
  if (IsSet(js_gid)) {
797
1
    CHECK(js_gid->IsInt32());
798
2
    const int32_t gid = js_gid.As<Int32>()->Value();
799
1
    uv_process_options_.gid = static_cast<uv_gid_t>(gid);
800
1
    uv_process_options_.flags |= UV_PROCESS_SETGID;
801
  }
802
803
  Local<Value> js_detached =
804
1974
      js_options->Get(context, env()->detached_string()).ToLocalChecked();
805
658
  if (js_detached->BooleanValue(isolate))
806
1
    uv_process_options_.flags |= UV_PROCESS_DETACHED;
807
808
  Local<Value> js_win_hide =
809
1974
      js_options->Get(context, env()->windows_hide_string()).ToLocalChecked();
810
658
  if (js_win_hide->BooleanValue(isolate))
811
2
    uv_process_options_.flags |= UV_PROCESS_WINDOWS_HIDE;
812
813
  Local<Value> js_wva =
814
1974
      js_options->Get(context, env()->windows_verbatim_arguments_string())
815
658
          .ToLocalChecked();
816
817
658
  if (js_wva->BooleanValue(isolate))
818
1
    uv_process_options_.flags |= UV_PROCESS_WINDOWS_VERBATIM_ARGUMENTS;
819
820
  Local<Value> js_timeout =
821
1974
      js_options->Get(context, env()->timeout_string()).ToLocalChecked();
822
658
  if (IsSet(js_timeout)) {
823
8
    CHECK(js_timeout->IsNumber());
824
16
    int64_t timeout = js_timeout->IntegerValue(context).FromJust();
825
8
    timeout_ = static_cast<uint64_t>(timeout);
826
  }
827
828
  Local<Value> js_max_buffer =
829
1974
      js_options->Get(context, env()->max_buffer_string()).ToLocalChecked();
830
658
  if (IsSet(js_max_buffer)) {
831
656
    CHECK(js_max_buffer->IsNumber());
832
1312
    max_buffer_ = js_max_buffer->NumberValue(context).FromJust();
833
  }
834
835
  Local<Value> js_kill_signal =
836
1974
      js_options->Get(context, env()->kill_signal_string()).ToLocalChecked();
837
658
  if (IsSet(js_kill_signal)) {
838
105
    CHECK(js_kill_signal->IsInt32());
839
210
    kill_signal_ = js_kill_signal.As<Int32>()->Value();
840
  }
841
842
  Local<Value> js_stdio =
843
1974
      js_options->Get(context, env()->stdio_string()).ToLocalChecked();
844
658
  r = ParseStdioOptions(js_stdio);
845
658
  if (r < 0) return Just(r);
846
847
658
  return Just(0);
848
}
849
850
851
658
int SyncProcessRunner::ParseStdioOptions(Local<Value> js_value) {
852
1316
  HandleScope scope(env()->isolate());
853
  Local<Array> js_stdio_options;
854
855
658
  if (!js_value->IsArray())
856
    return UV_EINVAL;
857
858
658
  Local<Context> context = env()->context();
859
658
  js_stdio_options = js_value.As<Array>();
860
861
658
  stdio_count_ = js_stdio_options->Length();
862
658
  uv_stdio_containers_ = new uv_stdio_container_t[stdio_count_];
863
864
658
  stdio_pipes_.clear();
865
658
  stdio_pipes_.resize(stdio_count_);
866
658
  stdio_pipes_initialized_ = true;
867
868
2632
  for (uint32_t i = 0; i < stdio_count_; i++) {
869
    Local<Value> js_stdio_option =
870
3948
        js_stdio_options->Get(context, i).ToLocalChecked();
871
872
1974
    if (!js_stdio_option->IsObject())
873
      return UV_EINVAL;
874
875
1974
    int r = ParseStdioOption(i, js_stdio_option.As<Object>());
876
1974
    if (r < 0)
877
      return r;
878
  }
879
880
658
  uv_process_options_.stdio = uv_stdio_containers_;
881
658
  uv_process_options_.stdio_count = stdio_count_;
882
883
658
  return 0;
884
}
885
886
887
1974
int SyncProcessRunner::ParseStdioOption(int child_fd,
888
                                        Local<Object> js_stdio_option) {
889
1974
  Local<Context> context = env()->context();
890
  Local<Value> js_type =
891
5922
      js_stdio_option->Get(context, env()->type_string()).ToLocalChecked();
892
893
3948
  if (js_type->StrictEquals(env()->ignore_string())) {
894
3
    return AddStdioIgnore(child_fd);
895
896
3942
  } else if (js_type->StrictEquals(env()->pipe_string())) {
897
1892
    Isolate* isolate = env()->isolate();
898
1892
    Local<String> rs = env()->readable_string();
899
1892
    Local<String> ws = env()->writable_string();
900
901
3784
    bool readable = js_stdio_option->Get(context, rs)
902
3784
        .ToLocalChecked()->BooleanValue(isolate);
903
    bool writable =
904
3784
        js_stdio_option->Get(context, ws)
905
3784
        .ToLocalChecked()->BooleanValue(isolate);
906
907
1892
    uv_buf_t buf = uv_buf_init(nullptr, 0);
908
909
1892
    if (readable) {
910
      Local<Value> input =
911
1872
          js_stdio_option->Get(context, env()->input_string()).ToLocalChecked();
912
624
      if (Buffer::HasInstance(input)) {
913
        buf = uv_buf_init(Buffer::Data(input),
914
22
                          static_cast<unsigned int>(Buffer::Length(input)));
915

1204
      } else if (!input->IsUndefined() && !input->IsNull()) {
916
        // Strings, numbers etc. are currently unsupported. It's not possible
917
        // to create a buffer for them here because there is no way to free
918
        // them afterwards.
919
        return UV_EINVAL;
920
      }
921
    }
922
923
1892
    return AddStdioPipe(child_fd, readable, writable, buf);
924
925

273
  } else if (js_type->StrictEquals(env()->inherit_string()) ||
926
151
             js_type->StrictEquals(env()->fd_string())) {
927
237
    int inherit_fd = js_stdio_option->Get(context, env()->fd_string())
928
237
        .ToLocalChecked()->Int32Value(context).FromJust();
929
79
    return AddStdioInheritFD(child_fd, inherit_fd);
930
931
  } else {
932
    CHECK(0 && "invalid child stdio type");
933
    return UV_EINVAL;
934
  }
935
}
936
937
938
3
int SyncProcessRunner::AddStdioIgnore(uint32_t child_fd) {
939
3
  CHECK_LT(child_fd, stdio_count_);
940
3
  CHECK(!stdio_pipes_[child_fd]);
941
942
3
  uv_stdio_containers_[child_fd].flags = UV_IGNORE;
943
944
3
  return 0;
945
}
946
947
948
1892
int SyncProcessRunner::AddStdioPipe(uint32_t child_fd,
949
                                    bool readable,
950
                                    bool writable,
951
                                    uv_buf_t input_buffer) {
952
1892
  CHECK_LT(child_fd, stdio_count_);
953
1892
  CHECK(!stdio_pipes_[child_fd]);
954
955
  std::unique_ptr<SyncProcessStdioPipe> h(
956
3784
      new SyncProcessStdioPipe(this, readable, writable, input_buffer));
957
958
1892
  int r = h->Initialize(uv_loop_);
959
1892
  if (r < 0) {
960
    h.reset();
961
    return r;
962
  }
963
964
1892
  uv_stdio_containers_[child_fd].flags = h->uv_flags();
965
1892
  uv_stdio_containers_[child_fd].data.stream = h->uv_stream();
966
967
1892
  stdio_pipes_[child_fd] = std::move(h);
968
969
1892
  return 0;
970
}
971
972
973
79
int SyncProcessRunner::AddStdioInheritFD(uint32_t child_fd, int inherit_fd) {
974
79
  CHECK_LT(child_fd, stdio_count_);
975
79
  CHECK(!stdio_pipes_[child_fd]);
976
977
79
  uv_stdio_containers_[child_fd].flags = UV_INHERIT_FD;
978
79
  uv_stdio_containers_[child_fd].data.fd = inherit_fd;
979
980
79
  return 0;
981
}
982
983
984
4606
bool SyncProcessRunner::IsSet(Local<Value> value) {
985

12280
  return !value->IsUndefined() && !value->IsNull();
986
}
987
988
758
Maybe<int> SyncProcessRunner::CopyJsString(Local<Value> js_value,
989
                                           const char** target) {
990
758
  Isolate* isolate = env()->isolate();
991
  Local<String> js_string;
992
  size_t size, written;
993
  char* buffer;
994
995
1516
  if (js_value->IsString())
996
758
    js_string = js_value.As<String>();
997
  else if (!js_value->ToString(env()->isolate()->GetCurrentContext())
998
                .ToLocal(&js_string))
999
    return Nothing<int>();
1000
1001
  // Include space for null terminator byte.
1002
1516
  if (!StringBytes::StorageSize(isolate, js_string, UTF8).To(&size))
1003
    return Nothing<int>();
1004
758
  size += 1;
1005
1006
758
  buffer = new char[size];
1007
1008
758
  written = StringBytes::Write(isolate, buffer, -1, js_string, UTF8);
1009
758
  buffer[written] = '\0';
1010
1011
758
  *target = buffer;
1012
758
  return Just(0);
1013
}
1014
1015
1316
Maybe<int> SyncProcessRunner::CopyJsStringArray(Local<Value> js_value,
1016
                                                char** target) {
1017
1316
  Isolate* isolate = env()->isolate();
1018
  Local<Array> js_array;
1019
  uint32_t length;
1020
  size_t list_size, data_size, data_offset;
1021
  char** list;
1022
  char* buffer;
1023
1024
1316
  if (!js_value->IsArray()) return Just<int>(UV_EINVAL);
1025
1026
1316
  Local<Context> context = env()->context();
1027
3948
  js_array = js_value.As<Array>()->Clone().As<Array>();
1028
1316
  length = js_array->Length();
1029
1316
  data_size = 0;
1030
1031
  // Index has a pointer to every string element, plus one more for a final
1032
  // null pointer.
1033
1316
  list_size = (length + 1) * sizeof *list;
1034
1035
  // Convert all array elements to string. Modify the js object itself if
1036
  // needed - it's okay since we cloned the original object. Also compute the
1037
  // length of all strings, including room for a null terminator after every
1038
  // string. Align strings to cache lines.
1039
50069
  for (uint32_t i = 0; i < length; i++) {
1040
97506
    auto value = js_array->Get(context, i).ToLocalChecked();
1041
1042
97506
    if (!value->IsString()) {
1043
      Local<String> string;
1044
141
      if (!value->ToString(env()->isolate()->GetCurrentContext())
1045
47
               .ToLocal(&string))
1046
        return Nothing<int>();
1047
      js_array
1048
94
          ->Set(context,
1049
                i,
1050
47
                string)
1051
          .Check();
1052
    }
1053
1054
48753
    Maybe<size_t> maybe_size = StringBytes::StorageSize(isolate, value, UTF8);
1055
48753
    if (maybe_size.IsNothing()) return Nothing<int>();
1056
48753
    data_size += maybe_size.FromJust() + 1;
1057
48753
    data_size = RoundUp(data_size, sizeof(void*));
1058
  }
1059
1060
1316
  buffer = new char[list_size + data_size];
1061
1062
1316
  list = reinterpret_cast<char**>(buffer);
1063
1316
  data_offset = list_size;
1064
1065
50069
  for (uint32_t i = 0; i < length; i++) {
1066
48753
    list[i] = buffer + data_offset;
1067
97506
    auto value = js_array->Get(context, i).ToLocalChecked();
1068
48753
    data_offset += StringBytes::Write(isolate,
1069
                                      buffer + data_offset,
1070
                                      -1,
1071
                                      value,
1072
                                      UTF8);
1073
48753
    buffer[data_offset++] = '\0';
1074
48753
    data_offset = RoundUp(data_offset, sizeof(void*));
1075
  }
1076
1077
1316
  list[length] = nullptr;
1078
1079
1316
  *target = buffer;
1080
1316
  return Just(0);
1081
}
1082
1083
1084
513
void SyncProcessRunner::ExitCallback(uv_process_t* handle,
1085
                                     int64_t exit_status,
1086
                                     int term_signal) {
1087
513
  SyncProcessRunner* self = reinterpret_cast<SyncProcessRunner*>(handle->data);
1088
513
  uv_close(reinterpret_cast<uv_handle_t*>(handle), nullptr);
1089
513
  self->OnExit(exit_status, term_signal);
1090
513
}
1091
1092
1093
5
void SyncProcessRunner::KillTimerCallback(uv_timer_t* handle) {
1094
5
  SyncProcessRunner* self = reinterpret_cast<SyncProcessRunner*>(handle->data);
1095
5
  self->OnKillTimerTimeout();
1096
5
}
1097
1098
1099
7
void SyncProcessRunner::KillTimerCloseCallback(uv_handle_t* handle) {
1100
  // No-op.
1101
7
}
1102
1103
}  // namespace node
1104
1105

17887
NODE_MODULE_CONTEXT_AWARE_INTERNAL(spawn_sync,
1106
  node::SyncProcessRunner::Initialize)