<html>
<head>
<base href="https://llvm.org/bugs/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - SBThread::StepOut erases stack frames and doesn't set return value"
href="https://llvm.org/bugs/show_bug.cgi?id=25111">25111</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>SBThread::StepOut erases stack frames and doesn't set return value
</td>
</tr>
<tr>
<th>Product</th>
<td>lldb
</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>All Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>lldb-dev@lists.llvm.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>berykubik@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=15035" name="attach_15035" title="C++ source with a simple function that returns a value">attachment 15035</a> <a href="attachment.cgi?id=15035&action=edit" title="C++ source with a simple function that returns a value">[details]</a></span>
C++ source with a simple function that returns a value
SBThread::StepOut doesn't seem to work for me on lldb 3.8 compiled from trunk.
When I use it, the thread loses it's stack frames (len(thread.frames) == 0) and
the return_value attribute doesn't get set. What is curious though, that when I
print the thread, it's description contains both the stack frame and the return
value (in text form). I've attached a simple C++ program that demonstrates
this. I've compiled it with -g, -O0 and even -fno-inline-small-functions, so
the function should not be inlined.
import lldb
import os
import time
debugger = lldb.SBDebugger.Create()
target = debugger.CreateTarget("./test")
target.BreakpointCreateByLocation("test.cpp", 3)
process = target.LaunchSimple([], [], os.getcwd())
time.sleep(2) # wait for BP to be hit
thread = process.GetSelectedThread()
thread.StepOut()
time.sleep(2) # wait for step out to complete
value = thread.GetStopReturnValue() # No value</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>