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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - lldb wrongly stopped at a return statement within a for loop"
href="https://bugs.llvm.org/show_bug.cgi?id=45603">45603</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>lldb wrongly stopped at a return statement within a for loop
</td>
</tr>
<tr>
<th>Product</th>
<td>lldb
</td>
</tr>
<tr>
<th>Version</th>
<td>9.0
</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>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<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>yangyibiao@hust.edu.cn
</td>
</tr>
<tr>
<th>CC</th>
<td>jdevlieghere@apple.com, llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>$ lldb -v
lldb version 9.0.1
$ cat small.c
int main()
{
int j = 0, d = 0;
if (j>=0)
for (; d; d++)
return 0;
return 0;
}
$ clang -g small.c; lldb ./a.out
(lldb) target create "./a.out"
Current executable set to './a.out' (x86_64).
(lldb) b small.c:5
Breakpoint 1: where = a.out`main + 35 at small.c:5:5, address =
0x0000000000001143
(lldb) run
Process 877280 launched: '/home/yibiao/cv-gcov/a.out' (x86_64)
Process 877280 stopped
* thread #1, name = 'a.out', stop reason = breakpoint 1.1
frame #0: 0x0000555555555143 a.out`main at small.c:5:5
2 {
3 int j = 0, d = 0;
4 if (j>=0)
-> 5 for (; d; d++)
6 return 0;
7 return 0;
8 }
(lldb) fr v
(int) j = 0
(int) d = 0
(lldb) step
Process 877280 stopped
* thread #1, name = 'a.out', stop reason = step in
frame #0: 0x000055555555515e a.out`main at small.c:6:14
3 int j = 0, d = 0;
4 if (j>=0)
5 for (; d; d++)
-> 6 return 0;
7 return 0;
8 }
(lldb) step
Process 877280 stopped
* thread #1, name = 'a.out', stop reason = step in
frame #0: 0x0000555555555163 a.out`main at small.c:7:3
4 if (j>=0)
5 for (; d; d++)
6 return 0;
-> 7 return 0;
8 }
*****
lldb is wrongly stopped at line 6. Before that, d is 0. Thus, the 6th statement
should be not executed.</pre>
</div>
</p>
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