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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Test getline_nohang.cc in fact hangs"
href="https://bugs.llvm.org/show_bug.cgi?id=39664">39664</a>
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<th>Summary</th>
<td>Test getline_nohang.cc in fact hangs
</td>
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<th>Product</th>
<td>compiler-rt
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>tsan
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>greened@obbligato.org
</td>
</tr>
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<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<p>
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<pre>I am seeing the tsan test getline_nohang.cc hang quite frequently on Linux SLES
12, on both X86_64 and AArch64. The backtrace indicates it's stuck waiting on
an I/O lock which is exactly the behavior the test is testing for. So it seems
the fix for this test isn't enough for some Linux variants.
(gdb) bt
#0 0x00007fb3e26cd13b in __lll_lock_wait_private () from /lib64/libc.so.6
#1 0x00007fb3e264cdc2 in __GI__IO_flush_all () from /lib64/libc.so.6
#2 0x00007fb3e264cebf in _IO_cleanup () from /lib64/libc.so.6
#3 0x00007fb3e260e0eb in __run_exit_handlers () from /lib64/libc.so.6
#4 0x00007fb3e260e185 in exit () from /lib64/libc.so.6
#5 0x00007fb3e25f76ec in __libc_start_main () from /lib64/libc.so.6
#6 0x0000000000420639 in _start () at ../sysdeps/x86_64/start.S:118</pre>
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