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<base href="https://bugs.llvm.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - sparc64 segfault with function returning an empty struct"
href="https://bugs.llvm.org/show_bug.cgi?id=41439">41439</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>sparc64 segfault with function returning an empty struct
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>8.0
</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>enhancement
</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>arnd@linaro.org
</td>
</tr>
<tr>
<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Attempting to build a sparc64 linux kernel with clang, I ran into a
segmentation fault compiling mm/mmap.c. Reduced the test case to
struct vm_userfaultfd_ctx {
} fn1(struct vm_userfaultfd_ctx p1) {
return p1;
}
$ clang-9 -cc1 mmap.c -triple sparc64-unknown-linux-gnu -S
Stack dump:
0. Program arguments: clang-9 -cc1 mmap-f2e46f.c -triple
sparc64-unknown-linux-gnu -S
1. <eof> parser at end of file
2. mmap-f2e46f.c:2:3: LLVM IR generation of declaration 'fn1'
3. mmap-f2e46f.c:2:3: Generating code for declaration 'fn1'
#0 0x00007f8be972b97f llvm::sys::PrintStackTrace(llvm::raw_ostream&)
(/usr/lib/x86_64-linux-gnu/libLLVM-9.so.1+0x96d97f)
#1 0x00007f8be9729dd0 llvm::sys::RunSignalHandlers()
(/usr/lib/x86_64-linux-gnu/libLLVM-9.so.1+0x96bdd0)
#2 0x00007f8be972bd88 (/usr/lib/x86_64-linux-gnu/libLLVM-9.so.1+0x96dd88)
#3 0x00007f8bec979390 __restore_rt
(/lib/x86_64-linux-gnu/libpthread.so.0+0x11390)
#4 0x000000000087982d (clang-9+0x87982d)
#5 0x000000000076836a (clang-9+0x76836a)
#6 0x000000000076984f (clang-9+0x76984f)
#7 0x0000000000780b8b (clang-9+0x780b8b)
#8 0x000000000077a90b (clang-9+0x77a90b)
#9 0x0000000000783072 (clang-9+0x783072)
#10 0x0000000000d70c3f (clang-9+0xd70c3f)
#11 0x0000000000d6e572 (clang-9+0xd6e572)
#12 0x00000000011f2c33 (clang-9+0x11f2c33)
#13 0x0000000000af751f (clang-9+0xaf751f)
#14 0x0000000000ab7878 (clang-9+0xab7878)
#15 0x0000000000b7c895 (clang-9+0xb7c895)
#16 0x00000000006b140c (clang-9+0x6b140c)
#17 0x00000000006af97f (clang-9+0x6af97f)
#18 0x00007f8be8167830 __libc_start_main
/build/glibc-LK5gWL/glibc-2.23/csu/../csu/libc-start.c:325:0
#19 0x00000000006ad0d9 (clang-9+0x6ad0d9)
Segmentation fault (core dumped)</pre>
</div>
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