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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - use_device_addr always returns a NULL pointer"
href="https://bugs.llvm.org/show_bug.cgi?id=48184">48184</a>
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</tr>
<tr>
<th>Summary</th>
<td>use_device_addr always returns a NULL pointer
</td>
</tr>
<tr>
<th>Product</th>
<td>OpenMP
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
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<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>csdaley@lbl.gov
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>The use_device_addr clause appears to be implemented incorrectly
(use_device_ptr clause works as expected). The LLVM OpenMP trace shows
use_device_addr returns a NULL pointer `Libomptarget --> Returning device
pointer 0x0000000000000000` before the test program segfaults on the fprintf
statement.
```
#include <stdio.h>
#include <stdlib.h>
#define N 100
int main()
{
double *x = malloc(N*sizeof(double));
#pragma omp target enter data map(alloc:x[:N])
#pragma omp target data use_device_ptr(x)
{
fprintf(stderr, "ptr=%p\n", (void*)x);
}
#pragma omp target data use_device_addr(x)
{
fprintf(stderr, "addr=%p\n", (void*)x); // Fail
}
return 0;
}
```
I tested with Clang/LLVM commit bae9aedb341c5f4eceafba2ee1fec7c05d842c97 (12
Nov 2020)</pre>
</div>
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