[ECOS] assertion error in stdio

["James Kahkoska" <jkahkoska at wire-less-inc dot com>]

I am having a problem with eCos when I turn on asserts in eCos.
I thought everything I/O related was working ok but when I turn on assertions,
I get the following assertion error:

 

ASSERT FAIL: stream.cxx          [  79] Cyg_StdioStream::Cyg_StdioStream()
Attempt to open invalid device!

 

The call stack looks like
hal_misc.c\cyg_hal_invoke_constructors() Line #92 (0x0001C930)
  stdout.cxx\global constructors keyed to 50000.cyg_libc_stdio_stdout() Line #90 (0x00020240)
    stdiofiles.inl\__static_initialization_and_destruction_0() Line #83 (0x000200DC)
      stream.cxx\Cyg_StdioStream::Cyg_StdioStream(void *, Cyg_StdioStream::OpenMode, bool, bool, int, unsigned int, unsigned char *)() Line #82 (0x00020328)
        buffer.cxx\cyg_assert_fail() Line #741 (0x0001DE84)

 

It appears the Cyg_StdioStream::Cyg_StdioStream contructor is being passed a NULL for the device and the assertion catches that.
I went further into the code and this originates in stdout.cxx cyg_libc_stdio_stdout() Line #90

 

  // And here's an instance of the class just to make the code run
  static cyg_libc_dummy_stdout_init_class cyg_libc_dummy_stdout_init
                                          CYG_INIT_PRIORITY(LIBC)

 

The constructor ends up calling calling 

 

  Cyg_libc_stdio_files::set_file_stream( fd_t fd, Cyg_StdioStream *stream )

 

which invokes the Cyg_StdioStream::Cyg_StdioStream(cyg_io_handle_t dev, constructor with a null device.
  
  CYG_CHECK_DATA_PTR(dev, "Attempt to open invalid device!");

 

Without asserts enabled my printf's to stdout seem to work fine. I am not sure about this dummy class and single static instance that causes the assertion to fail.
The comment is my only clue to it's existence:

 

// This is a dummy class just so we can execute arbitrary code when
// stdout is requested

 

Any ideas as to why I need this dummy class or why it might be blowing up?

 

Thanks, James

 

 

James Kahkoska
jkahkoska@wire-less-inc.com
719-528-8885 x104