Hi there, I've been working on a patch for LLDB but have been having an issue running the test suite (even on a clean checkout of trunk) where the ScriptInterpreter tests are hitting SIGSEGV. From what I understand, the unit test involves an embedded Python interpreter and it's happening when we try to import the LLDB module.
I was wondering whether anyone has encountered this before. I'm new to LLDB and LLVM in general so I figured I'd check if there's something obvious I'm doing wrong before going too far down the rabbit hole. In case it's important, my CMake and Ninja invocations look like this: cmake -G Ninja -DCMAKE_BUILD_TYPE=Debug -DLLVM_ENABLE_ASSERTIONS=ON -DLLVM_ENABLE_PROJECTS="clang;lldb;libcxx;libcxxabi" -DCMAKE_CXX_COMPILER="g++-5" -DLLVM_PARALLEL_LINK_JOBS=1 -DBUILD_SHARED_LIBS=ON ../llvm LD_LIBRARY_PATH=/home/alexc/work/llvm-project/build/lib ninja check-lldb-unit And each stack trace looks like this: [==========] Running 1 test from 1 test case. [----------] Global test environment set-up. [----------] 1 test from PythonExceptionStateTest [ RUN ] PythonExceptionStateTest.TestExceptionStateChecking #0 0x00007efeaf557e4d llvm::sys::PrintStackTrace(llvm::raw_ostream&) /home/alexc/work/llvm-project/llvm/lib/Support/Unix/Signals.inc:532:0 #1 0x00007efeaf557ee0 PrintStackTraceSignalHandler(void*) /home/alexc/work/llvm-project/llvm/lib/Support/Unix/Signals.inc:593:0 #2 0x00007efeaf555da8 llvm::sys::RunSignalHandlers() /home/alexc/work/llvm-project/llvm/lib/Support/Signals.cpp:68:0 #3 0x00007efeaf557801 SignalHandler(int) /home/alexc/work/llvm-project/llvm/lib/Support/Unix/Signals.inc:384:0 #4 0x00007efeaeec7890 __restore_rt (/lib/x86_64-linux-gnu/libpthread.so.0+0x12890) #5 0x00007efe9a63c6ee _init (/usr/lib/x86_64-linux-gnu/libLLVM-6.0.so.1+0x6db6ee) #6 0x00007efeb74aa733 call_init /build/glibc-OTsEL5/glibc-2.27/elf/dl-init.c:72:0 #7 0x00007efeb74aa733 _dl_init /build/glibc-OTsEL5/glibc-2.27/elf/dl-init.c:119:0 #8 0x00007efeb74af1ff dl_open_worker /build/glibc-OTsEL5/glibc-2.27/elf/dl-open.c:525:0 #9 0x00007efeab7642df _dl_catch_exception /build/glibc-OTsEL5/glibc-2.27/elf/dl-error-skeleton.c:197:0 #10 0x00007efeb74ae7ca _dl_open /build/glibc-OTsEL5/glibc-2.27/elf/dl-open.c:605:0 #11 0x00007efeaecb1f96 __asprintf /build/glibc-OTsEL5/glibc-2.27/dlfcn/dlopen.c:66:0 #12 0x00007efeab7642df _dl_catch_exception /build/glibc-OTsEL5/glibc-2.27/elf/dl-error-skeleton.c:197:0 #13 0x00007efeab76436f _dl_catch_error /build/glibc-OTsEL5/glibc-2.27/elf/dl-error-skeleton.c:216:0 #14 0x00007efeaecb2735 _dlerror_run /build/glibc-OTsEL5/glibc-2.27/dlfcn/dlerror.c:162:0 #15 0x00007efeaecb2051 dlopen /build/glibc-OTsEL5/glibc-2.27/dlfcn/dlopen.c:87:0 #16 0x00007efeac1a0950 _PyImport_GetDynLoadFunc (/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0+0x1ba950) #17 0x00007efeac143e30 _PyImport_LoadDynamicModule (/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0+0x15de30) #18 0x00007efeac1bb3ee (/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0+0x1d53ee) #19 0x00007efeac145041 (/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0+0x15f041) #20 0x00007efeac145326 (/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0+0x15f326) #21 0x00007efeac145715 PyImport_ImportModuleLevel (/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0+0x15f715) #22 0x00007efeac09b274 (/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0+0xb5274) #23 0x00007efeac03a4a3 PyObject_Call (/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0+0x544a3) #24 0x00007efeac1c5127 PyEval_CallObjectWithKeywords (/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0+0x1df127) #25 0x00007efeac0913cc PyEval_EvalFrameEx (/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0+0xab3cc) #26 0x00007efeac1c5bf8 PyEval_EvalCodeEx (/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0+0x1dfbf8) #27 0x00007efeac08d409 PyEval_EvalCode (/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0+0xa7409) #28 0x00007efeac1b5abc PyImport_ExecCodeModuleEx (/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0+0x1cfabc) #29 0x00007efeac1bad52 (/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0+0x1d4d52) #30 0x00007efeac1bb32e (/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0+0x1d532e) #31 0x00007efeac1bb63a (/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0+0x1d563a) #32 0x00007efeac145041 (/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0+0x15f041) #33 0x00007efeac145542 PyImport_ImportModuleLevel (/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0+0x15f542) #34 0x00007efeac09b274 (/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0+0xb5274) #35 0x00007efeac03a4a3 PyObject_Call (/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0+0x544a3) #36 0x00007efeac1c5127 PyEval_CallObjectWithKeywords (/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0+0x1df127) #37 0x00007efeac0913cc PyEval_EvalFrameEx (/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0+0xab3cc) #38 0x00007efeac1c5bf8 PyEval_EvalCodeEx (/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0+0x1dfbf8) #39 0x00007efeac08d409 PyEval_EvalCode (/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0+0xa7409) #40 0x00007efeac13d6d6 PyRun_StringFlags (/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0+0x1576d6) #41 0x00007efeac13d76b PyRun_SimpleStringFlags (/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0+0x15776b) #42 0x0000558f9f40a0d1 lldb_private::ScriptInterpreterPythonImpl::InitializePrivate() /home/alexc/work/llvm-project/lldb/source/Plugins/ScriptInterpreter/Python/ScriptInterpreterPython.cpp:3183:0 #43 0x0000558f9f3b2de2 PythonTestSuite::SetUp() /home/alexc/work/llvm-project/lldb/unittests/ScriptInterpreter/Python/PythonTestSuite.cpp:39:0 #44 0x00007efeb704ab33 void testing::internal::HandleSehExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*) /home/alexc/work/llvm-project/llvm/utils/unittest/googletest/src/gtest.cc:2404:0 #45 0x00007efeb704435e void testing::internal::HandleExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*) /home/alexc/work/llvm-project/llvm/utils/unittest/googletest/src/gtest.cc:2455:0 #46 0x00007efeb702af8f testing::Test::Run() /home/alexc/work/llvm-project/llvm/utils/unittest/googletest/src/gtest.cc:2472:0 #47 0x00007efeb702b7a4 testing::TestInfo::Run() /home/alexc/work/llvm-project/llvm/utils/unittest/googletest/src/gtest.cc:2660:0 #48 0x00007efeb702bda8 testing::TestCase::Run() /home/alexc/work/llvm-project/llvm/utils/unittest/googletest/src/gtest.cc:2773:0 #49 0x00007efeb7031cb4 testing::internal::UnitTestImpl::RunAllTests() /home/alexc/work/llvm-project/llvm/utils/unittest/googletest/src/gtest.cc:4647:0 #50 0x00007efeb704bbb6 bool testing::internal::HandleSehExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char const*) /home/alexc/work/llvm-project/llvm/utils/unittest/googletest/src/gtest.cc:2404:0 #51 0x00007efeb7044e73 bool testing::internal::HandleExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char const*) /home/alexc/work/llvm-project/llvm/utils/unittest/googletest/src/gtest.cc:2455:0 #52 0x00007efeb7030b2c testing::UnitTest::Run() /home/alexc/work/llvm-project/llvm/utils/unittest/googletest/src/gtest.cc:4260:0 #53 0x00007efeb7297cac RUN_ALL_TESTS() /home/alexc/work/llvm-project/llvm/utils/unittest/googletest/include/gtest/gtest.h:2234:0 #54 0x00007efeb7297bb8 main /home/alexc/work/llvm-project/llvm/utils/unittest/UnitTestMain/TestMain.cpp:51:0 #55 0x00007efeab61eb97 __libc_start_main /build/glibc-OTsEL5/glibc-2.27/csu/../csu/libc-start.c:344:0 #56 0x0000558f9f39b20a _start (/mnt/data0/alexc/work/llvm-project/build/tools/lldb/unittests/ScriptInterpreter/Python/./ScriptInterpreterPythonTests+0x1a220a) Thanks, Alex
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