[lldb-dev] [Bug 18841] New: lldb crashing when running embedded python commands on Ubuntu 12.04 x86_64

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=18841

            Bug ID: 18841
           Summary: lldb crashing when running embedded python commands on
                    Ubuntu 12.04 x86_64
           Product: lldb
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: All Bugs
          Assignee: lldb-dev at cs.uiuc.edu
          Reporter: tfiala at google.com
    Classification: Unclassified

Repro steps:

1. Build lldb with cmake/ninja using a debug build type.
2. Run lldb
3. (lldb) script
4. >>> 5+5
5. Hit seg fault in python lib-dynload/readline.so

Details follow:

tfiala at tfiala2:/mnt/ssd/work/git/llgs/build-debug/bin$ ./lldb
(lldb) script
Python Interactive Interpreter. To exit, type 'quit()', 'exit()' or Ctrl-D.
>>> 5+5
Segmentation fault (core dumped)
tfiala at tfiala2:/mnt/ssd/work/git/llgs/build-debug/bin$ ls -l core
-rw------- 1 tfiala eng 22777856 Feb 14 10:23 core
tfiala at tfiala2:/mnt/ssd/work/git/llgs/build-debug/bin$ date
Fri Feb 14 10:24:09 PST 2014

tfiala at tfiala2:/mnt/ssd/work/git/llgs/build-debug/bin$ gdb ./lldb core
GNU gdb (GDB) 7.6-gg23
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux".

<http://go/gdb-home  FAQ: http://go/gdb-faq  Email: gdb-team  IRC: gdb>
Reading symbols from /mnt/ssd/work/git/llgs/build-debug/bin/./lldb...done.

warning: core file may not match specified executable file.
[New LWP 15500]
[New LWP 15506]

warning: Can't read pathname for load map: Input/output error.
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/grte/v3/lib64/libthread_db.so.1".
Core was generated by `./lldb'.
Program terminated with signal 11, Segmentation fault.
#0  0x00007fe4381c2e87 in ?? () from /usr/lib/python2.7/lib-dynload/readline.so
(gdb) bt
#0  0x00007fe4381c2e87 in ?? () from /usr/lib/python2.7/lib-dynload/readline.so
#1  0x00007fe43b164610 in PyOS_Readline () from /usr/lib/libpython2.7.so.1.0
#2  0x00007fe43b0e1fad in ?? () from /usr/lib/libpython2.7.so.1.0
#3  0x00007fe43b0ad5d5 in PyEval_EvalFrameEx () from
/usr/lib/libpython2.7.so.1.0
#4  0x00007fe43b06d6b5 in PyEval_EvalCodeEx () from
/usr/lib/libpython2.7.so.1.0
#5  0x00007fe43b0ad650 in PyEval_EvalFrameEx () from
/usr/lib/libpython2.7.so.1.0
#6  0x00007fe43b06d6b5 in PyEval_EvalCodeEx () from
/usr/lib/libpython2.7.so.1.0
#7  0x00007fe43b0ad650 in PyEval_EvalFrameEx () from
/usr/lib/libpython2.7.so.1.0
#8  0x00007fe43b06d6b5 in PyEval_EvalCodeEx () from
/usr/lib/libpython2.7.so.1.0
#9  0x00007fe43b0ad650 in PyEval_EvalFrameEx () from
/usr/lib/libpython2.7.so.1.0
#10 0x00007fe43b0ae37b in PyEval_EvalFrameEx () from
/usr/lib/libpython2.7.so.1.0
#11 0x00007fe43b06d6b5 in PyEval_EvalCodeEx () from
/usr/lib/libpython2.7.so.1.0
#12 0x00007fe43b06d9e2 in PyEval_EvalCode () from /usr/lib/libpython2.7.so.1.0
#13 0x00007fe43b06da7c in PyRun_StringFlags () from
/usr/lib/libpython2.7.so.1.0
#14 0x00007fe43b06e6cb in PyRun_SimpleStringFlags () from
/usr/lib/libpython2.7.so.1.0
#15 0x00007fe43ddac3a5 in IOHandlerPythonInterpreter::Run (this=0xe14a50)
    at
/mnt/ssd/work/git/llgs/llvm/tools/lldb/source/Interpreter/ScriptInterpreterPython.cpp:764
#16 0x00007fe43dc3c842 in lldb_private::Debugger::ExecuteIOHanders
(this=0xacfd30)
    at /mnt/ssd/work/git/llgs/llvm/tools/lldb/source/Core/Debugger.cpp:865
#17 0x00007fe43dd7b8e5 in
lldb_private::CommandInterpreter::RunCommandInterpreter (this=0xaef380,
auto_handle_events=true, 
    spawn_thread=false) at
/mnt/ssd/work/git/llgs/llvm/tools/lldb/source/Interpreter/CommandInterpreter.cpp:3125
#18 0x00007fe43db3cfef in lldb::SBDebugger::RunCommandInterpreter
(this=0x7fff9de54e80, auto_handle_events=true, spawn_thread=false)
    at /mnt/ssd/work/git/llgs/llvm/tools/lldb/source/API/SBDebugger.cpp:961
#19 0x0000000000408a9e in Driver::MainLoop (this=0x7fff9de54e60)
    at /mnt/ssd/work/git/llgs/llvm/tools/lldb/tools/driver/Driver.cpp:967
#20 0x0000000000408e47 in main (argc=1, argv=0x7fff9de55058,
envp=0x7fff9de55068)
    at /mnt/ssd/work/git/llgs/llvm/tools/lldb/tools/driver/Driver.cpp:1060
(gdb)

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