https://llvm.org/bugs/show_bug.cgi?id=27639
Bug ID: 27639
Summary: LLDB python API segfaults during debugger teardown
Product: lldb
Version: unspecified
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: All Bugs
Assignee: lldb-dev@lists.llvm.org
Reporter: proge...@gatech.edu
CC: llvm-b...@lists.llvm.org
Classification: Unclassified
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> >
>::~__vector_base() + 49
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 ?
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