138 lines
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HTML
138 lines
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<title>Debug Aids For VVP — Icarus Verilog documentation</title>
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<link rel="next" title="The VVP Target" href="../tgt-vvp/tgt-vvp.html" />
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<section id="debug-aids-for-vvp">
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<h1>Debug Aids For VVP<a class="headerlink" href="#debug-aids-for-vvp" title="Link to this heading">¶</a></h1>
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<p>Debugging vvp can be fiendishly difficult, so there are some built in
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debugging aids. These are enabled by setting the environment variable
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VVP_DEBUG to the path to an output file. Then, various detailed debug
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tools can be enabled as described below.</p>
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<ul class="simple">
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<li><p>.resolv</p></li>
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</ul>
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<p>The .resolv can print debug information along with a label by
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specifying the debug output label on the .resolv line:</p>
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<div class="highlight-none notranslate"><div class="highlight"><pre><span></span>.resolv tri$<label>
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</pre></div>
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</div>
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<p>In this case, the “$” character directly after the “tri” enables debug
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dumps for this node, and the <label> is the label to prepend to log
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messages from this node.</p>
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</section>
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<p class="caption" role="heading"><span class="caption-text">Contents:</span></p>
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<li class="toctree-l1"><a class="reference internal" href="../../../usage/index.html">Icarus Verilog Usage</a></li>
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<li class="toctree-l1"><a class="reference internal" href="../../../targets/index.html">The Icarus Verilog Targets</a></li>
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<li><a href="../../../index.html">Documentation overview</a><ul>
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<li><a href="index.html">VVP - Verilog Virtual Processor</a><ul>
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<li>Previous: <a href="vthread.html" title="previous chapter">Thread Details</a></li>
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<li>Next: <a href="../tgt-vvp/tgt-vvp.html" title="next chapter">The VVP Target</a></li>
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