Ensure that each profiling entry ends with a new line.

src/log-utils.cc

 // Copyright 2009 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/v8.h"
 
 #include "src/log-utils.h"
 #include "src/string-stream.h"
 
 namespace v8 {
@@ skipping 201 matching lines @@
   Vector<char> buf(log_->message_buffer_ + pos_,
                    Log::kMessageBufferSize - pos_);
   StrNCpy(buf, str, len);
   pos_ += len;
   ASSERT(pos_ <= Log::kMessageBufferSize);
 }
 
 
 void Log::MessageBuilder::WriteToLogFile() {
   ASSERT(pos_ <= Log::kMessageBufferSize);
+  // Assert that we do not already have a new line at the end.
+  ASSERT(pos_ == 0 || log_->message_buffer_[pos_ - 1] != '\n');
+  if (pos_ == Log::kMessageBufferSize) pos_--;
+  log_->message_buffer_[pos_++] = '\n';
   const int written = log_->WriteToFile(log_->message_buffer_, pos_);
   if (written != pos_) {
     log_->stop();
     log_->logger_->LogFailure();
   }
 }
 
 
 } }  // namespace v8::internal