Re: [Discuss-gnuradio] possible bug in tag->srcid processing

[Jeff Long]

It looks like you're doing it right. The example 
gr-blocks/examples/vector_source_with_tags.grc does the same thing, and 
also fails to report srcid correctly.

Walked through the process in Python and it works fine.

  In [57]: h = pmt.to_pmt('hello')

  In [58]: type(h)
  Out[58]: pmt.pmt_swig.swig_int_ptr

  In [59]: pmt.is_symbol(h)
  Out[59]: True

So, probably not a swig problem. Somehow, the 'symbolness' of srcid is 
getting lost before it gets to the tag debug block.

Removed the is_symbol() check in tag debug, and got this:

  thread[thread-per-block[2]: <block tag_debug (3)>]:
  pmt_symbol_to_string: wrong_type : #f

Gave up.

- Jeff

On 09/25/2014 08:50 PM, Jared Dulmage wrote:
> This issue is for GNURadio 3.7.4 on Ubuntu 14.04 and gcc 4.8.2, swig 2.0.11.
>
> I have a simple GRC flow graph consisting of a vector source -> throttle
> -> tag debug.  Vector source params:
>
> Vector:[1, ] * 100
> Tags: [python_to_tag({'offset': 0, 'key': pmt.to_pmt('PDU'), 'value':
> pmt.to_pmt(2.3), 'srcid': pmt.to_pmt('blocks_vector_source_x_0')}),]
>
> Output looks like:
>
> ----------------------------------------------------------------------
> Tag Debug: Debug tags
> Input Stream: 00
>    Offset: 0  Source: n/a     Key: PDU   Value: 2.3
> ----------------------------------------------------------------------
>
> The srcid appears to be correctly translated to a pmt symbol in python
> and set in python_to_tag, but in tag_debug_impl.cc:126 the type check
>
> (pmt::is_symbol(d_tags_itr->srcid) ?
> pmt::symbol_to_string(d_tags_itr->srcid) : "n/a")
>
> is false.  Within the debugger the test pmt::is_bool(d_tags_itr->srcid)
> returns true.  I am not sure how to further debug this problem.  Is this
> a swig issue?  Am I making a mistake in the tag creation?
>
> Appreciate any suggestions.
>
> Jared.
>
>
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