<html>
    <head>
      <base href="http://llvm.org/bugs/" />
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - Shadow-Stack C personality"
   href="http://llvm.org/bugs/show_bug.cgi?id=16175">16175</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>Shadow-Stack C personality
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>new-bugs
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>3.1
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>All
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>All
          </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>unassignedbugs@nondot.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>humbug@deeptown.org
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>llvmbugs@cs.uiuc.edu
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr></table>
      <p>
        <div>
        <pre>The C personality function is hardcoded:

Constant *PersFn =
   F.getParent()->
   getOrInsertFunction("__gcc_personality_v0",
                       FunctionType::get(Type::getInt32Ty(C), true));

If there is another personality, ShadowStackGC pass invalidates IR:

Personality function doesn't match others in function
  %cleanup.lpad = landingpad { i8*, i32 } personality i32 (...)*
@__gcc_personality_v0
          cleanup
Broken module found, compilation aborted!
Stack dump:
0.    Running pass 'Function Pass Manager' on module '...'.
1.    Running pass 'Module Verifier' on function '...'</pre>
        </div>
      </p>
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