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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - 'memory read' reports 0s for unreadable memory on FreeBSD"
href="https://bugs.llvm.org/show_bug.cgi?id=37190">37190</a>
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<th>Summary</th>
<td>'memory read' reports 0s for unreadable memory on FreeBSD
</td>
</tr>
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<th>Product</th>
<td>lldb
</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>Windows NT
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>enhancement
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>All Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>lldb-dev@lists.llvm.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>emaste@freebsd.org
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
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<pre>ptrace returns an error but it's not propagated to the user:
(lldb) memory read -format hex -size 8 0
reebsd.operationptrace(PT_IO, 92788, 0x7fffdedfaed8, 0) called from file
/tank/emaste/src/git-stable-11/contrib/llvm/tools/lldb/source/Plugins/Process/FreeBSD/ProcessMonitor.cpp
line 166
reebsd.operationPT_IO: op=READ_D offs=0 size=512
reebsd.operationptrace() failed; errno=14 (<unknown>)
0x00000000: 0x0000000000000000 0x0000000000000000
0x00000010: 0x0000000000000000 0x0000000000000000
0x00000020: 0x0000000000000000 0x0000000000000000
0x00000030: 0x0000000000000000 0x0000000000000000
I tried as far back as lldb37 and it fails there.
(For reference, "reebsd.operation" is the thread name - final 16 chars of
"lldb.process.freebsd.operation"; it seems "-n" mode is enabled by default in
"log enable posix all"?)</pre>
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