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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Multiple processes can write to the same gcda files at the same time on Windows"
href="https://bugs.llvm.org/show_bug.cgi?id=34923">34923</a>
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<th>Summary</th>
<td>Multiple processes can write to the same gcda files at the same time on Windows
</td>
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<th>Product</th>
<td>new-bugs
</td>
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<th>Version</th>
<td>5.0
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Windows NT
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>new bugs
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>mcastelluccio@mozilla.com
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<p>
<div>
<pre>flock is a no-op on Windows
(<a href="https://github.com/llvm-mirror/compiler-rt/blob/d89810afdc2862ea865f5c297ef4ea5839941d25/lib/profile/WindowsMMap.c#L122">https://github.com/llvm-mirror/compiler-rt/blob/d89810afdc2862ea865f5c297ef4ea5839941d25/lib/profile/WindowsMMap.c#L122</a>),
which means the gcda files can get corrupted if multiple processes are writing
them at the same time.</pre>
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