44 lines
2.5 KiB
HTML
44 lines
2.5 KiB
HTML
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
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<title>3.2.4.1.<2E>Debugging</title>
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<link rel="stylesheet" type="text/css" href="../book.css">
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<meta name="generator" content="DocBook XSL Stylesheets V1.76.1">
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<link rel="home" href="index.html" title="The Yocto Project Reference Manual">
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<link rel="up" href="tips-and-tricks.html" title="3.2.4.<2E>Tips and Tricks">
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<link rel="prev" href="tips-and-tricks.html" title="3.2.4.<2E>Tips and Tricks">
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<link rel="next" href="invalidating-shared-state.html" title="3.2.4.2.<2E>Invalidating Shared State">
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</head>
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<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="section" title="3.2.4.1.<2E>Debugging">
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<div class="titlepage"><div><div><h4 class="title">
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<a name="debugging"></a>3.2.4.1.<2E>Debugging</h4></div></div></div>
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<p>
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When things go wrong, debugging needs to be straightforward.
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Because of this, the Yocto Project team included strong debugging
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tools:
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</p>
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<div class="itemizedlist"><ul class="itemizedlist" type="disc">
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<li class="listitem"><p>Whenever a shared state package is written out, so is a
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corresponding <code class="filename">.siginfo</code> file.
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This practice results in a pickled python database of all
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the metadata that went into creating the hash for a given shared state
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package.</p></li>
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<li class="listitem"><p>If BitBake is run with the <code class="filename">--dump-signatures</code>
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(or <code class="filename">-S</code>) option, BitBake dumps out
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<code class="filename">.siginfo</code> files in
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the stamp directory for every task it would have executed instead of
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building the specified target package.</p></li>
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<li class="listitem"><p>There is a <code class="filename">bitbake-diffsigs</code> command that
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can process these <code class="filename">.siginfo</code> files.
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If one file is specified, it will dump out the dependency
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information in the file.
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If two files are specified, it will compare the two files and dump out
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the differences between the two.
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This allows the question of "What changed between X and Y?" to be
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answered easily.</p></li>
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</ul></div>
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<p>
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</p>
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</div></body>
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</html>
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