diff options
| -rw-r--r-- | gnuradio-runtime/lib/block_executor.cc | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/gnuradio-runtime/lib/block_executor.cc b/gnuradio-runtime/lib/block_executor.cc index ded1324fa3..ef2e4948bd 100644 --- a/gnuradio-runtime/lib/block_executor.cc +++ b/gnuradio-runtime/lib/block_executor.cc @@ -370,12 +370,25 @@ namespace gr { // ask the block how much input they need to produce noutput_items m->forecast (noutput_items, d_ninput_items_required); - // See if we've got sufficient input available + // See if we've got sufficient input available and make sure we + // didn't overflow on the input. int i; - for(i = 0; i < d->ninputs (); i++) + for(i = 0; i < d->ninputs (); i++) { if(d_ninput_items_required[i] > d_ninput_items[i]) // not enough break; + if(d_ninput_items_required[i] < 0) { + std::cerr << "\nsched: <block " << m->name() + << " (" << m->unique_id() << ")>" + << " thinks its ninput_items required is " + << d_ninput_items_required[i] + << " and cannot be negative.\n" + << "Some parameterization is wrong. " + << "Too large a decimation value?\n\n"; + goto were_done; + } + } + if(i < d->ninputs()) { // not enough input on input[i] // if we can, try reducing the size of our output request if(noutput_items > m->output_multiple()) { |