[Lldb-commits] [lldb] Add a test for evicting unreachable modules from the global module cache (PR #74894)

[David Spickett via lldb-commits]

DavidSpickett wrote:

This test crashes on Arm and AArch64:
```
******************** TEST 'lldb-api :: python_api/global_module_cache/TestGlobalModuleCache.py' FAILED ********************
Script:
--
/usr/bin/python3.8 /home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/llvm-project/lldb/test/API/dotest.py -u CXXFLAGS -u CFLAGS --env ARCHIVER=/usr/local/bin/llvm-ar --env OBJCOPY=/usr/bin/llvm-objcopy --env LLVM_LIBS_DIR=/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/./lib --env LLVM_INCLUDE_DIR=/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/include --env LLVM_TOOLS_DIR=/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/./bin --arch aarch64 --build-dir /home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/lldb-test-build.noindex --lldb-module-cache-dir /home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/lldb-test-build.noindex/module-cache-lldb/lldb-api --clang-module-cache-dir /home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/lldb-test-build.noindex/module-cache-clang/lldb-api --executable /home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/./bin/lldb --compiler /home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/./bin/clang --dsymutil /home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/./bin/dsymutil --llvm-tools-dir /home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/./bin --lldb-libs-dir /home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/./lib /home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/llvm-project/lldb/test/API/python_api/global_module_cache -p TestGlobalModuleCache.py
--
Exit Code: -6

Command Output (stdout):
--
lldb version 18.0.0git (https://github.com/llvm/llvm-project.git revision bb18611e3630d956b74fe33209321cb8ba9272a8)
  clang revision bb18611e3630d956b74fe33209321cb8ba9272a8
  llvm revision bb18611e3630d956b74fe33209321cb8ba9272a8

--
Command Output (stderr):
--
python3.8: ../llvm-project/lldb/source/Target/ThreadPlanStack.cpp:151: lldb::ThreadPlanSP lldb_private::ThreadPlanStack::PopPlan(): Assertion `m_plans.size() > 1 && "Can't pop the base thread plan"' failed.
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
 #0 0x0000ffff7f3d8d60 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/lib/python3.8/site-packages/lldb/_lldb.cpython-38-aarch64-linux-gnu.so+0x51d7d60)
 #1 0x0000ffff7f3d6d1c llvm::sys::RunSignalHandlers() (/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/lib/python3.8/site-packages/lldb/_lldb.cpython-38-aarch64-linux-gnu.so+0x51d5d1c)
 #2 0x0000ffff7f3d9494 SignalHandler(int) (/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/lib/python3.8/site-packages/lldb/_lldb.cpython-38-aarch64-linux-gnu.so+0x51d8494)
 #3 0x0000ffff85fee7dc (linux-vdso.so.1+0x7dc)
 #4 0x0000ffff85e7cd78 raise /build/glibc-RIFKjK/glibc-2.31/signal/../sysdeps/unix/sysv/linux/raise.c:51:1
 #5 0x0000ffff85e69aac abort /build/glibc-RIFKjK/glibc-2.31/stdlib/abort.c:81:7
 #6 0x0000ffff85e76490 __assert_fail_base /build/glibc-RIFKjK/glibc-2.31/assert/assert.c:89:7
 #7 0x0000ffff85e764f4 (/lib/aarch64-linux-gnu/libc.so.6+0x2d4f4)
 #8 0x0000ffff7ef6f744 lldb_private::ThreadPlanStack::PopPlan() (/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/lib/python3.8/site-packages/lldb/_lldb.cpython-38-aarch64-linux-gnu.so+0x4d6e744)
 #9 0x0000ffff7ef482f8 lldb_private::Thread::PopPlan() (/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/lib/python3.8/site-packages/lldb/_lldb.cpython-38-aarch64-linux-gnu.so+0x4d472f8)
#10 0x0000ffff7ef47ca8 lldb_private::Thread::ShouldStop(lldb_private::Event*) (/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/lib/python3.8/site-packages/lldb/_lldb.cpython-38-aarch64-linux-gnu.so+0x4d46ca8)
#11 0x0000ffff7ef544c8 lldb_private::ThreadList::ShouldStop(lldb_private::Event*) (/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/lib/python3.8/site-packages/lldb/_lldb.cpython-38-aarch64-linux-gnu.so+0x4d534c8)
#12 0x0000ffff7eed3c30 lldb_private::Process::ShouldBroadcastEvent(lldb_private::Event*) (/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/lib/python3.8/site-packages/lldb/_lldb.cpython-38-aarch64-linux-gnu.so+0x4cd2c30)
#13 0x0000ffff7eecd220 lldb_private::Process::HandlePrivateEvent(std::shared_ptr<lldb_private::Event>&) (/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/lib/python3.8/site-packages/lldb/_lldb.cpython-38-aarch64-linux-gnu.so+0x4ccc220)
#14 0x0000ffff7eed4eb4 lldb_private::Process::RunPrivateStateThread(bool) (/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/lib/python3.8/site-packages/lldb/_lldb.cpython-38-aarch64-linux-gnu.so+0x4cd3eb4)
#15 0x0000ffff7eee06f0 std::_Function_handler<void* (), lldb_private::Process::StartPrivateStateThread(bool)::$_0>::_M_invoke(std::_Any_data const&) (/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/lib/python3.8/site-packages/lldb/_lldb.cpython-38-aarch64-linux-gnu.so+0x4cdf6f0)
#16 0x0000ffff7edd3f80 lldb_private::HostNativeThreadBase::ThreadCreateTrampoline(void*) (/home/tcwg-buildbot/worker/lldb-aarch64-ubuntu/build/lib/python3.8/site-packages/lldb/_lldb.cpython-38-aarch64-linux-gnu.so+0x4bd2f80)
#17 0x0000ffff85e1f624 start_thread /build/glibc-RIFKjK/glibc-2.31/nptl/pthread_create.c:477:8
#18 0x0000ffff85f1a49c /build/glibc-RIFKjK/glibc-2.31/misc/../sysdeps/unix/sysv/linux/aarch64/clone.S:81:0
```
Though not consistently.

I'm going to revert this until I have time to figure out why.

https://github.com/llvm/llvm-project/pull/74894