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<base href="https://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - LLDB python API segfaults during debugger teardown"
href="https://llvm.org/bugs/show_bug.cgi?id=27639">27639</a>
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</tr>
<tr>
<th>Summary</th>
<td>LLDB python API segfaults during debugger teardown
</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>All
</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>progers7@gatech.edu
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
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<div>
<pre>I'm hitting a segfault with a very simple python script using the lldb api:
Python script:
---------8<---------
import lldb
if __name__ == "__main__":
debugger = lldb.SBDebugger.Create()
target = debugger.CreateTarget("helloworld")
---------8<---------
helloworld.cpp is just a blank executable compiled with "g++ helloworld.cpp -o
helloworld".
Crash details:
"Python quit unexpectedly while using the _lldb.so plugin."
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000008
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 org.python.python 0x000000010f6a9fce 0x10f609000 + 659406
1 org.python.python 0x000000010f6aa481 PyGILState_Ensure + 55
2 _lldb.so 0x0000000112da937a
lldb_private::ScriptInterpreterPython::Locker::DoAcquireLock() + 28
3 _lldb.so 0x0000000112daea6b
lldb_private::ScriptInterpreterPython::Clear() + 37
4 _lldb.so 0x0000000112ae9510
lldb_private::Debugger::Clear() + 266
5 _lldb.so 0x0000000112aea8ec
lldb_private::Debugger::~Debugger() + 28
6 _lldb.so 0x0000000112aeac0e
lldb_private::Debugger::~Debugger() + 14
7 libc++.1.dylib 0x00007fff95ee5cb8
std::__1::__shared_weak_count::__release_shared() + 44
8 _lldb.so 0x0000000110b2b6cf
std::__1::__vector_base<std::__1::shared_ptr<lldb_private::TypeImpl>,
std::__1::allocator<std::__1::shared_ptr<lldb_private::TypeImpl> >
<span class="quote">>::~__vector_base() + 49</span >
9 libsystem_c.dylib 0x00007fff91e0746b __cxa_finalize_ranges
+ 345
10 libsystem_c.dylib 0x00007fff91e0776f exit + 55
11 libdyld.dylib 0x00007fff8fd2f5b4 start + 8
Python version: 2.7.10 (2.7.10)
LLDB version: 350.0.21.9
OS: Mac OS X 10.11.4 (15E65)
This crash can be suppressed by manually cleaning up the objects:
debugger.DeleteTarget(target)
debugger.Terminate()
I've searched around and didn't find any other reports of this on OSX. Possibly
related to rdar://problem/24580184 / dc5ef2da510f3adba99cd8b2fe18c2e6d417227d ?</pre>
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