<html>
<head>
<base href="https://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - std::string has no value"
href="https://llvm.org/bugs/show_bug.cgi?id=25205">25205</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>std::string has no 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=15088" name="attach_15088" title="C++ source with test program">attachment 15088</a> <a href="attachment.cgi?id=15088&action=edit" title="C++ source with test program">[details]</a></span>
C++ source with test program
std::string variables have value "None" when I access them using the Python
scripting API. They only have one child, which also has a value of None. Is
there another way to get the string value, or am I doing something wrong? I
could probably print the string into the terminal and get the result from the
command interpreter, but it would be nice to access the string directly.
I've attached a simple C++ program that demonstrates this.
I'm using LLDB 3.8 compiled from trunk. The program was compiled using clang++
with libc++ (I also tried g++ and -fstandalone-debug switch with similar
results).
import lldb
import os
debugger = lldb.SBDebugger.Create()
debugger.SetAsync(False)
target = debugger.CreateTarget("./test")
target.BreakpointCreateByLocation("test.cpp", 7)
process = target.LaunchSimple([], [], os.getcwd())
thread = process.GetSelectedThread()
frame = thread.GetSelectedFrame()
for var in frame.vars:
if var.name == "a":
print(var.value) # None
debugger.Terminate()</pre>
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