Slides for 4xxx.

[libguestfs-talks.git] / 2020-frama-c / 4600-range-size-3.html

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+<script src="code.js" type="text/javascript"></script>
+
+<h1>qemu range_size() counterexample</h1>
+
+<pre class="code">
+  /* Get the size of range. */
+  static inline uint64_t range_size(const Range *range)
+  {
+      return range->upb - range->lob + 1;
+  }
+</pre>
+<pre>
+  ┌─────────────────────────────────────────────────┐ 
+  │░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░│
+  └─────────────────────────────────────────────────┘
+  range->lob == 0           range->upb == UINT64_MAX
+</pre>