<html>
<head>
<base href="https://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 --- - WinEHPrepare needs to watch out for va_start in catch handlers"
href="https://llvm.org/bugs/show_bug.cgi?id=23094">23094</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>WinEHPrepare needs to watch out for va_start in catch handlers
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</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>Common Code Generator Code
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>david.majnemer@gmail.com
</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>consider:
void g();
int f(int a, ...) {
try {
g();
} catch (int) {
__builtin_va_list ap;
__builtin_va_start(ap, a);
int x = __builtin_va_arg(ap, int);
__builtin_va_end(ap);
return x;
}
return -1;
}
the outlined catch handler will contain:
call void @llvm.va_start(i8* %ap1)
this will not end well for our catch handler seeing as how the arguments really
belong to the parent function.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>