<html>
<head>
<base href="https://bugs.llvm.org/">
</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 - parseSystemVersionPList assumes three numbers in the version number"
href="https://bugs.llvm.org/show_bug.cgi?id=47918">47918</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>parseSystemVersionPList assumes three numbers in the version number
</td>
</tr>
<tr>
<th>Product</th>
<td>compiler-rt
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Macintosh
</td>
</tr>
<tr>
<th>OS</th>
<td>MacOS X
</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>compiler-rt
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>avi@drissman.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>In an (non-public) Chromium bug, <a href="https://crbug.com/1138707">https://crbug.com/1138707</a>, we see a crash in
parseSystemVersionPList on macOS Big Sur:
std::__1::__throw_out_of_range(char const*) + stdexcept:0
abort_message + abort_message.cpp:32
parseSystemVersionPList +
extensions::CpuInfoProvider::QueryInfo() + cpu_info_provider.cc:44
The `extensions` code is from Chromium; parseSystemVersionPList appears to be
the version from LLVM’s compiler-rt/lib/builtins/os_version_check.c.
If we look at the implementation of parseSystemVersionPList on LLVM ToT we see
(<a href="https://github.com/llvm/llvm-project/blob/master/compiler-rt/lib/builtins/os_version_check.c#L193">https://github.com/llvm/llvm-project/blob/master/compiler-rt/lib/builtins/os_version_check.c#L193</a>):
sscanf(VersionStr, "%d.%d.%d", &GlobalMajor, &GlobalMinor, &GlobalSubminor);
It’s parsing the field “ProductVersion” from
/System/Library/CoreServices/SystemVersion.plist. If we look at that file on
Big Sur (20A5395g in this case) we see:
<key>ProductVersion</key>
<string>11.0</string>
and there are only two numbers and one period.
I can’t say with 100% certainty that it is that specific line, but something
appears to occasionally crash Chromium on Big Sur inside a compiler-added
parseSystemVersionPList() call.</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>