Provide stdout and stderr output in the Observatory debugger.

runtime/bin/file.cc

 // Copyright (c) 2013, 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.
 
 #include "bin/file.h"
 
 #include "bin/builtin.h"
 #include "bin/dartutils.h"
 #include "bin/io_buffer.h"
 #include "bin/utils.h"
 
 #include "include/dart_api.h"
+#include "include/dart_tools_api.h"
 
 namespace dart {
 namespace bin {
 
 static const int kMSPerSecond = 1000;
 
+// Are we capturing output from either stdout or stderr for the VM Service?
+bool captureStdio = false;

[Cutch, 2015/07/13 14:10:29]

capture_stdio

[turnidge, 2015/07/13 22:50:36]

Done.

+
+// Are we capturing output from stdout for the VM service?
+bool captureStdout = false;

[Cutch, 2015/07/13 14:10:29]

capture_stdout

...

[turnidge, 2015/07/13 22:50:36]

Done.

+
+// Are we capturing output from stderr for the VM service?
+bool captureStderr = false;
+
 
 // The file pointer has been passed into Dart as an intptr_t and it is safe
 // to pull it out of Dart as a 64-bit integer, cast it to an intptr_t and
 // from there to a File pointer.
 static File* GetFilePointer(Dart_Handle handle) {
   intptr_t value = DartUtils::GetIntptrValue(handle);
   return reinterpret_cast<File*>(value);
 }
 
 
@@ skipping 16 matching lines @@
   int64_t remaining = num_bytes;
   const char* current_buffer = reinterpret_cast<const char*>(buffer);
   while (remaining > 0) {
     int64_t bytes_written = Write(current_buffer, remaining);
     if (bytes_written < 0) {
       return false;
     }
     remaining -= bytes_written;  // Reduce the number of remaining bytes.
     current_buffer += bytes_written;  // Move the buffer forward.
   }
+  if (captureStdio) {
+    intptr_t fd = GetFD();
+    if (fd == 1 && captureStdout) {

[Cutch, 2015/07/13 14:10:29]

(fd == STDOUT_FILENO) && 

[turnidge, 2015/07/13 22:50:36]

Done.  Also fixed existing usage of 0, 1, 2 in File_OpenStdio and
File_GetStdioHandleType.

+      Dart_ServiceSendDataEvent("Stdout", "WriteEvent",
+                                reinterpret_cast<const uint8_t*>(buffer),
+                                num_bytes);
+    } else if (fd == 2 && captureStderr) {

[Cutch, 2015/07/13 14:10:29]

(fd == STDERR_FILENO) &&

[turnidge, 2015/07/13 22:50:36]

Done.

+      Dart_ServiceSendDataEvent("Stderr", "WriteEvent",
+                                reinterpret_cast<const uint8_t*>(buffer),
+                                num_bytes);
+    }
+  }
   return true;
 }
 
 
 File::FileOpenMode File::DartModeToFileMode(DartFileOpenMode mode) {
   ASSERT(mode == File::kDartRead ||
          mode == File::kDartWrite ||
          mode == File::kDartAppend ||
          mode == File::kDartWriteOnly ||
          mode == File::kDartWriteOnlyAppend);
@@ skipping 1191 matching lines @@
       }
     } else {
       return CObject::FileClosedError();
     }
   }
   return CObject::IllegalArgumentError();
 }
 
 }  // namespace bin
 }  // namespace dart