<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 --- - [64-bit ms] clang-cl produced binary crashes with StackWalk64"
href="https://llvm.org/bugs/show_bug.cgi?id=24543">24543</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>[64-bit ms] clang-cl produced binary crashes with StackWalk64
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</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>C++11
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>nicolasweber@gmx.de
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>The attached program sets up a crash handler that calls StackWalk64 to print
stacks on crash, and the calls __debugbreak(). This crashes once (for the
__debugbreak) when the program is built with cl but twice if it's built with
clang-cl. Only happens in 64-bit and only with optimizations enabled.
I think this is the cause of
<a href="https://code.google.com/p/chromium/issues/detail?id=520982">https://code.google.com/p/chromium/issues/detail?id=520982</a>
C:\src\chrome\src>"third_party\llvm-build\Release+Asserts\bin\clang-cl.exe"
test.cc dbghelp.lib /Zi /O2 /Zc:inline /Oy- /D_HAS_EXCEPTIONS=0 -m64
C:\src\chrome\src>cl test.cc dbghelp.lib /Zi /O2 /Zc:inline /Oy-
/D_HAS_EXCEPTIONS=0</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>