Fix Process.runSync error handling.

runtime/bin/process_macos.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #if !defined(DART_IO_DISABLED)
 
 #include "platform/globals.h"
 #if defined(TARGET_OS_MACOS)
 
 #include "bin/process.h"
@@ skipping 766 matching lines @@
                    intptr_t* id,
                    intptr_t* exit_event,
                    char** os_error_message) {
   ProcessStarter starter(path, arguments, arguments_length, working_directory,
                          environment, environment_length, mode, in, out, err,
                          id, exit_event, os_error_message);
   return starter.Start();
 }
 
 
-class BufferList : public BufferListBase {
- public:
-  BufferList() {}
-
-  bool Read(int fd, intptr_t available) {
-    // Read all available bytes.
-    while (available > 0) {
-      if (free_size_ == 0) {
-        Allocate();
-      }
-      ASSERT(free_size_ > 0);
-      ASSERT(free_size_ <= kBufferSize);
-      size_t block_size = dart::Utils::Minimum(free_size_, available);
-      ssize_t bytes = TEMP_FAILURE_RETRY(
-          read(fd, reinterpret_cast<void*>(FreeSpaceAddress()), block_size));
-      if (bytes < 0) {
-        return false;
-      }
-      data_size_ += bytes;
-      free_size_ -= bytes;
-      available -= bytes;
-    }
-    return true;
-  }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(BufferList);
-};
-
-
 static bool CloseProcessBuffers(struct pollfd fds[3]) {
   int e = errno;
   VOID_TEMP_FAILURE_RETRY(close(fds[0].fd));
   VOID_TEMP_FAILURE_RETRY(close(fds[1].fd));
   VOID_TEMP_FAILURE_RETRY(close(fds[2].fd));
   errno = e;
   return false;
 }
 
 
@@ skipping 69 matching lines @@
         if (i < alive) {
           fds[i] = fds[alive];
         }
       }
     }
   }
 
   // All handles closed and all data read.
   result->set_stdout_data(out_data.GetData());
   result->set_stderr_data(err_data.GetData());
+  DEBUG_ASSERT(out_data.IsEmpty());
+  DEBUG_ASSERT(err_data.IsEmpty());
 
   // Calculate the exit code.
   intptr_t exit_code = exit_code_data.ints[0];
   intptr_t negative = exit_code_data.ints[1];
   if (negative != 0) {
     exit_code = -exit_code;
   }
   result->set_exit_code(exit_code);
 
   return true;
@@ skipping 198 matching lines @@
     VOID_NO_RETRY_EXPECTED(sigaction(signal, &act, NULL));
   }
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_MACOS)
 
 #endif  // !defined(DART_IO_DISABLED)