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<base href="https://bugs.llvm.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - OpenMP declare mapper causes segmentation fault"
href="https://bugs.llvm.org/show_bug.cgi?id=49698">49698</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>OpenMP declare mapper causes segmentation fault
</td>
</tr>
<tr>
<th>Product</th>
<td>OpenMP
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</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>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Runtime Library
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jtramm@anl.gov
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=24686" name="attach_24686" title="reproducer">attachment 24686</a> <a href="attachment.cgi?id=24686&action=edit" title="reproducer">[details]</a></span>
reproducer
The use of an OpenMP declare mapper for performing deep copies on a multi-level
object hierarchy appears to result in a segmentation fault. The seg fault
occurs on the host after after copying data from host -> device -> host.
Compiler Version: 13.0.0 (<a href="https://github.com/llvm/llvm-project.git">https://github.com/llvm/llvm-project.git</a>
d70185ec4821f7960c4fe10961479d97e816da68)
Platform: Intel host + NVIDIA V100 GPU target
Compilation:
clang++ -Wall -fopenmp -fopenmp-targets=nvptx64-nvidia-cuda -Xopenmp-target
-march=sm_70 main.cpp
Runtime Behavior:
<span class="quote">>$ ./a.out</span >
Original data hierarchy:
Object C Contents:
Object B Contents:
Object A Contents:
data1 = 1 data2 = 2
Object A Contents:
data1 = 1 data2 = 2
Object B Contents:
Object A Contents:
data1 = 1 data2 = 2
Object A Contents:
data1 = 1 data2 = 2
Object C Contents:
Object B Contents:
Object A Contents:
data1 = 1 data2 = 2
Object A Contents:
data1 = 1 data2 = 2
Object B Contents:
Object A Contents:
data1 = 1 data2 = 2
Object A Contents:
data1 = 1 data2 = 2
Sending data to device...
Calling foo()...
foo() complete!
Sending data back to host...
Modified Data Hierarchy:
Object C Contents:
Object B Contents:
Object A Contents:
Segmentation fault</pre>
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