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      <base href="https://llvm.org/bugs/" />
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - add -fsanitize-failure-function"
   href="https://llvm.org/bugs/show_bug.cgi?id=24443">24443</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>add -fsanitize-failure-function
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>clang
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>unspecified
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>PC
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Linux
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>-New Bugs
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>unassignedclangbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>danalbert@google.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>chh@google.com, enh@google.com, eugeni.stepanov@gmail.com, llvm-bugs@lists.llvm.org, srhines@google.com
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Context: <a href="https://android-review.googlesource.com/#/c/166402/">https://android-review.googlesource.com/#/c/166402/</a>

We want to have better error messages for `LOCAL_SANITIZE := integer` (and
friends) without harming performance for the non-failing case. The error
messages from the ubsan runtime mess with optimization, so that won't do.
-ftrap-function affects all __builtin_trap() invocations, so that won't do
either.

-fsanitize-failure-function would alter ubsan code gen to emit calls to the
specified function rather than __builtin_trap().</pre>
        </div>
      </p>
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