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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - lldb very slow single stepping rep stosb"
href="https://bugs.llvm.org/show_bug.cgi?id=43091">43091</a>
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<th>Summary</th>
<td>lldb very slow single stepping rep stosb
</td>
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<th>Product</th>
<td>lldb
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>PC
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<th>OS</th>
<td>Linux
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<th>Status</th>
<td>NEW
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
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<th>Component</th>
<td>All Bugs
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<th>Assignee</th>
<td>lldb-dev@lists.llvm.org
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<th>Reporter</th>
<td>ntysdd@qq.com
</td>
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<th>CC</th>
<td>jdevlieghere@apple.com, llvm-bugs@lists.llvm.org
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<p>
<div>
<pre>When single stepping the asm instructions, I find lldb very slow when
encountering a (large) rep stosb.
The debugger essentially hung.
While I can use Ctrl-C to break the program into debugger, I still can't
continue debugging, because even I put a breakpoint on the next instruction,
and use the "c" command, it is still very slow.
However, if I don't try to single step the rep instruction, and directly put a
breakpoint on the next instruction and use "c", it's way faster.</pre>
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