Intermittent lldb-api.tools/lldb-server/TestLldbGdbServer.py failure

[nikic]

I regularly see this one failing in pre-merge checks:

Script:
--
/usr/bin/python3 /home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/test/API/dotest.py -u CXXFLAGS -u CFLAGS --env LLVM_LIBS_DIR=/home/gha/actions-runner/_work/llvm-project/llvm-project/build/./lib --env LLVM_INCLUDE_DIR=/home/gha/actions-runner/_work/llvm-project/llvm-project/build/include --env LLVM_TOOLS_DIR=/home/gha/actions-runner/_work/llvm-project/llvm-project/build/./bin --libcxx-include-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/include/c++/v1 --libcxx-include-target-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/include/x86_64-unknown-linux-gnu/c++/v1 --libcxx-library-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/./lib/x86_64-unknown-linux-gnu --arch x86_64 --build-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/lldb-test-build.noindex --lldb-module-cache-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/lldb-test-build.noindex/module-cache-lldb/lldb-api --clang-module-cache-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/lldb-test-build.noindex/module-cache-clang/lldb-api --executable /home/gha/actions-runner/_work/llvm-project/llvm-project/build/./bin/lldb --compiler /home/gha/actions-runner/_work/llvm-project/llvm-project/build/./bin/clang --dsymutil /home/gha/actions-runner/_work/llvm-project/llvm-project/build/./bin/dsymutil --make /usr/bin/gmake --llvm-tools-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/./bin --lldb-obj-root /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/lldb --lldb-libs-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/./lib --cmake-build-type Release /home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/test/API/tools/lldb-server -p TestLldbGdbServer.py
--
Exit Code: 1

Command Output (stdout):
--
lldb version 22.0.0git (https://github.com/llvm/llvm-project revision c2d04cf8fdd2f3cb8ef4aa293a55e700312d0c6c)
  clang revision c2d04cf8fdd2f3cb8ef4aa293a55e700312d0c6c
  llvm revision c2d04cf8fdd2f3cb8ef4aa293a55e700312d0c6c
Skipping the following test categories: ['msvcstl', 'dsym', 'gmodules', 'debugserver', 'objc']

--
Command Output (stderr):
--
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_Hc_then_Csignal_signals_correct_thread_launch_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_Hc_then_Csignal_signals_correct_thread_launch_debugserver) (test case does not fall in any category of interest for this run) 
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_Hc_then_Csignal_signals_correct_thread_launch_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_Hc_then_Csignal_signals_correct_thread_launch_llgs)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_Hg_fails_on_another_pid_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_Hg_fails_on_another_pid_llgs)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_Hg_fails_on_minus_one_pid_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_Hg_fails_on_minus_one_pid_llgs)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_Hg_fails_on_zero_pid_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_Hg_fails_on_zero_pid_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_Hg_switches_to_3_threads_launch_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_Hg_switches_to_3_threads_launch_debugserver) (test case does not fall in any category of interest for this run) 
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_Hg_switches_to_3_threads_launch_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_Hg_switches_to_3_threads_launch_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_P_and_p_thread_suffix_work_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_P_and_p_thread_suffix_work_debugserver) (test case does not fall in any category of interest for this run) 
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_P_and_p_thread_suffix_work_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_P_and_p_thread_suffix_work_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_P_writes_all_gpr_registers_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_P_writes_all_gpr_registers_debugserver) (test case does not fall in any category of interest for this run) 
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_P_writes_all_gpr_registers_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_P_writes_all_gpr_registers_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_attach_commandline_continue_app_exits_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_attach_commandline_continue_app_exits_debugserver) (test case does not fall in any category of interest for this run) 
lldb-server exiting...
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_attach_commandline_continue_app_exits_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_attach_commandline_continue_app_exits_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_c_packet_works_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_c_packet_works_debugserver) (test case does not fall in any category of interest for this run) 
lldb-server exiting...
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_c_packet_works_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_c_packet_works_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_first_launch_stop_reply_thread_matches_first_qC_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_first_launch_stop_reply_thread_matches_first_qC_debugserver) (test case does not fall in any category of interest for this run) 
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_first_launch_stop_reply_thread_matches_first_qC_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_first_launch_stop_reply_thread_matches_first_qC_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_hardware_breakpoint_set_and_remove_work_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_hardware_breakpoint_set_and_remove_work_debugserver) (test case does not fall in any category of interest for this run) 
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_hardware_breakpoint_set_and_remove_work_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_hardware_breakpoint_set_and_remove_work_llgs) (skipping due to the following parameter(s): architecture) 
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_inferior_print_exit_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_inferior_print_exit_debugserver) (test case does not fall in any category of interest for this run) 
lldb-server exiting...
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_inferior_print_exit_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_inferior_print_exit_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_list_threads_in_stop_reply_supported_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_list_threads_in_stop_reply_supported_debugserver) (test case does not fall in any category of interest for this run) 
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_list_threads_in_stop_reply_supported_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_list_threads_in_stop_reply_supported_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_m_packet_reads_memory_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_m_packet_reads_memory_debugserver) (test case does not fall in any category of interest for this run) 
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_m_packet_reads_memory_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_m_packet_reads_memory_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_p_returns_correct_data_size_for_each_qRegisterInfo_launch_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_p_returns_correct_data_size_for_each_qRegisterInfo_launch_debugserver) (test case does not fall in any category of interest for this run) 
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_p_returns_correct_data_size_for_each_qRegisterInfo_launch_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_p_returns_correct_data_size_for_each_qRegisterInfo_launch_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_qThreadInfo_contains_thread_attach_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_qThreadInfo_contains_thread_attach_debugserver) (test case does not fall in any category of interest for this run) 
Program aborted due to an unhandled Error:
Operation not permitted
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0.	Program arguments: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/lldb-server gdbserver --attach=1594532 --reverse-connect [127.0.0.1]:51305
 #0 0x00000000006a1fd8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Support/Unix/Signals.inc:834:13
 #1 0x000000000069f725 llvm::sys::RunSignalHandlers() /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Support/Signals.cpp:105:18
 #2 0x00000000006a2d91 SignalHandler(int, siginfo_t*, void*) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Support/Unix/Signals.inc:426:38
 #3 0x0000792f1bf36330 (/lib/x86_64-linux-gnu/libc.so.6+0x45330)
 #4 0x0000792f1bf8fb2c pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x9eb2c)
 #5 0x0000792f1bf3627e raise (/lib/x86_64-linux-gnu/libc.so.6+0x4527e)
 #6 0x0000792f1bf198ff abort (/lib/x86_64-linux-gnu/libc.so.6+0x288ff)
 #7 0x000000000064f9c0 operator<< /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Support/raw_ostream.h:234:7
 #8 0x000000000064f9c0 operator<< /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Support/raw_ostream.h:258:18
 #9 0x000000000064f9c0 llvm::Error::fatalUncheckedError() const /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Support/Error.cpp:129:10
#10 0x00000000006d5ec1 lldb_private::process_linux::NativeProcessLinux::Attach(int) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Support/Error.h:0:7
#11 0x00000000006d53f8 operator bool /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Support/Error.h:576:17
#12 0x00000000006d53f8 lldb_private::process_linux::NativeProcessLinux::Manager::Attach(unsigned long, lldb_private::NativeProcessProtocol::NativeDelegate&) /home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp:316:8
#13 0x0000000000729868 operator bool /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Support/Error.h:576:17
#14 0x0000000000729868 lldb_private::process_gdb_remote::GDBRemoteCommunicationServerLLGS::AttachToProcess(unsigned long) /home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.cpp:362:8
#15 0x000000000062b6f8 handle_attach_to_pid /home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/tools/lldb-server/lldb-gdbserver.cpp:113:13
#16 0x000000000062b6f8 handle_attach(lldb_private::process_gdb_remote::GDBRemoteCommunicationServerLLGS&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>> const&) /home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/tools/lldb-server/lldb-gdbserver.cpp:138:5
#17 0x000000000062e107 hasArg<(anonymous namespace)::ID> /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Option/ArgList.h:246:31
#18 0x000000000062e107 main_gdbserver(int, char**) /home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/tools/lldb-server/lldb-gdbserver.cpp:416:26
#19 0x0000000000635904 load /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/atomic_base.h:837:9
#20 0x0000000000635904 load /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/atomic:577:21
#21 0x0000000000635904 operator* /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Support/ManagedStatic.h:89:21
#22 0x0000000000635904 operator-> /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Support/ManagedStatic.h:96:29
#23 0x0000000000635904 terminate_debugger /home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/tools/lldb-server/lldb-server.cpp:48:36
#24 0x0000000000635904 main /home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/tools/lldb-server/lldb-server.cpp:0:0
#25 0x0000792f1bf1b1ca (/lib/x86_64-linux-gnu/libc.so.6+0x2a1ca)
#26 0x0000792f1bf1b28b __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2a28b)
#27 0x000000000062b595 _start (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/lldb-server+0x62b595)
FAIL: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_qThreadInfo_contains_thread_attach_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_qThreadInfo_contains_thread_attach_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_qThreadInfo_contains_thread_launch_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_qThreadInfo_contains_thread_launch_debugserver) (test case does not fall in any category of interest for this run) 
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_qThreadInfo_contains_thread_launch_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_qThreadInfo_contains_thread_launch_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_qThreadInfo_matches_qC_attach_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_qThreadInfo_matches_qC_attach_debugserver) (test case does not fall in any category of interest for this run) 
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_qThreadInfo_matches_qC_attach_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_qThreadInfo_matches_qC_attach_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_qThreadInfo_matches_qC_launch_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_qThreadInfo_matches_qC_launch_debugserver) (test case does not fall in any category of interest for this run) 
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_qThreadInfo_matches_qC_launch_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_qThreadInfo_matches_qC_launch_llgs)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_qXfer_siginfo_read_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_qXfer_siginfo_read_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_software_breakpoint_set_and_remove_work_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_software_breakpoint_set_and_remove_work_debugserver) (test case does not fall in any category of interest for this run) 
lldb-server exiting...
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_software_breakpoint_set_and_remove_work_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_software_breakpoint_set_and_remove_work_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_thread_suffix_supported_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_thread_suffix_supported_debugserver) (test case does not fall in any category of interest for this run) 
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_thread_suffix_supported_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_thread_suffix_supported_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_written_M_content_reads_back_correctly_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_written_M_content_reads_back_correctly_debugserver) (test case does not fall in any category of interest for this run) 
lldb-server exiting...
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_written_M_content_reads_back_correctly_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_written_M_content_reads_back_correctly_llgs)
======================================================================
ERROR: test_qThreadInfo_contains_thread_attach_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_qThreadInfo_contains_thread_attach_llgs)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/packages/Python/lldbsuite/test/tools/lldb-server/gdbremote_testcase.py", line 48, in test_method
    return attrvalue(self)
           ^^^^^^^^^^^^^^^
  File "/home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/test/API/tools/lldb-server/TestLldbGdbServer.py", line 163, in test_qThreadInfo_contains_thread_attach
    self.qThreadInfo_contains_thread()
  File "/home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/test/API/tools/lldb-server/TestLldbGdbServer.py", line 140, in qThreadInfo_contains_thread
    procs = self.prep_debug_monitor_and_inferior()
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/packages/Python/lldbsuite/test/tools/lldb-server/gdbremote_testcase.py", line 526, in prep_debug_monitor_and_inferior
    server = self.connect_to_debug_monitor(attach_pid=attach_pid)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/packages/Python/lldbsuite/test/tools/lldb-server/gdbremote_testcase.py", line 378, in connect_to_debug_monitor
    server = self.launch_debug_monitor(attach_pid=attach_pid)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/packages/Python/lldbsuite/test/tools/lldb-server/gdbremote_testcase.py", line 370, in launch_debug_monitor
    self.sock = sock.accept()[0]
                ^^^^^^^^^^^^^
  File "/usr/lib/python3.12/socket.py", line 295, in accept
    fd, addr = self._accept()
               ^^^^^^^^^^^^^^
TimeoutError: timed out
Config=x86_64-/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang
----------------------------------------------------------------------
Ran 42 tests in 72.160s

FAILED (errors=1, skipped=20)

--

[llvmbot]

@llvm/issue-subscribers-infrastructure

Author: Nikita Popov (nikic)

I regularly see this one failing in pre-merge checks: ``` Script: -- /usr/bin/python3 /home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/test/API/dotest.py -u CXXFLAGS -u CFLAGS --env LLVM_LIBS_DIR=/home/gha/actions-runner/_work/llvm-project/llvm-project/build/./lib --env LLVM_INCLUDE_DIR=/home/gha/actions-runner/_work/llvm-project/llvm-project/build/include --env LLVM_TOOLS_DIR=/home/gha/actions-runner/_work/llvm-project/llvm-project/build/./bin --libcxx-include-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/include/c++/v1 --libcxx-include-target-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/include/x86_64-unknown-linux-gnu/c++/v1 --libcxx-library-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/./lib/x86_64-unknown-linux-gnu --arch x86_64 --build-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/lldb-test-build.noindex --lldb-module-cache-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/lldb-test-build.noindex/module-cache-lldb/lldb-api --clang-module-cache-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/lldb-test-build.noindex/module-cache-clang/lldb-api --executable /home/gha/actions-runner/_work/llvm-project/llvm-project/build/./bin/lldb --compiler /home/gha/actions-runner/_work/llvm-project/llvm-project/build/./bin/clang --dsymutil /home/gha/actions-runner/_work/llvm-project/llvm-project/build/./bin/dsymutil --make /usr/bin/gmake --llvm-tools-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/./bin --lldb-obj-root /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/lldb --lldb-libs-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/./lib --cmake-build-type Release /home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/test/API/tools/lldb-server -p TestLldbGdbServer.py -- Exit Code: 1

Command Output (stdout):

lldb version 22.0.0git (https://github.com/llvm/llvm-project revision c2d04cf8fdd2f3cb8ef4aa293a55e700312d0c6c)
clang revision c2d04cf8fdd2f3cb8ef4aa293a55e700312d0c6c
llvm revision c2d04cf8fdd2f3cb8ef4aa293a55e700312d0c6c
Skipping the following test categories: ['msvcstl', 'dsym', 'gmodules', 'debugserver', 'objc']

--
Command Output (stderr):

UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_Hc_then_Csignal_signals_correct_thread_launch_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_Hc_then_Csignal_signals_correct_thread_launch_debugserver) (test case does not fall in any category of interest for this run)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_Hc_then_Csignal_signals_correct_thread_launch_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_Hc_then_Csignal_signals_correct_thread_launch_llgs)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_Hg_fails_on_another_pid_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_Hg_fails_on_another_pid_llgs)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_Hg_fails_on_minus_one_pid_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_Hg_fails_on_minus_one_pid_llgs)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_Hg_fails_on_zero_pid_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_Hg_fails_on_zero_pid_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_Hg_switches_to_3_threads_launch_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_Hg_switches_to_3_threads_launch_debugserver) (test case does not fall in any category of interest for this run)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_Hg_switches_to_3_threads_launch_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_Hg_switches_to_3_threads_launch_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_P_and_p_thread_suffix_work_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_P_and_p_thread_suffix_work_debugserver) (test case does not fall in any category of interest for this run)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_P_and_p_thread_suffix_work_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_P_and_p_thread_suffix_work_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_P_writes_all_gpr_registers_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_P_writes_all_gpr_registers_debugserver) (test case does not fall in any category of interest for this run)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_P_writes_all_gpr_registers_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_P_writes_all_gpr_registers_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_attach_commandline_continue_app_exits_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_attach_commandline_continue_app_exits_debugserver) (test case does not fall in any category of interest for this run)
lldb-server exiting...
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_attach_commandline_continue_app_exits_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_attach_commandline_continue_app_exits_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_c_packet_works_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_c_packet_works_debugserver) (test case does not fall in any category of interest for this run)
lldb-server exiting...
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_c_packet_works_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_c_packet_works_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_first_launch_stop_reply_thread_matches_first_qC_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_first_launch_stop_reply_thread_matches_first_qC_debugserver) (test case does not fall in any category of interest for this run)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_first_launch_stop_reply_thread_matches_first_qC_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_first_launch_stop_reply_thread_matches_first_qC_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_hardware_breakpoint_set_and_remove_work_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_hardware_breakpoint_set_and_remove_work_debugserver) (test case does not fall in any category of interest for this run)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_hardware_breakpoint_set_and_remove_work_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_hardware_breakpoint_set_and_remove_work_llgs) (skipping due to the following parameter(s): architecture)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_inferior_print_exit_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_inferior_print_exit_debugserver) (test case does not fall in any category of interest for this run)
lldb-server exiting...
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_inferior_print_exit_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_inferior_print_exit_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_list_threads_in_stop_reply_supported_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_list_threads_in_stop_reply_supported_debugserver) (test case does not fall in any category of interest for this run)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_list_threads_in_stop_reply_supported_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_list_threads_in_stop_reply_supported_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_m_packet_reads_memory_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_m_packet_reads_memory_debugserver) (test case does not fall in any category of interest for this run)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_m_packet_reads_memory_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_m_packet_reads_memory_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_p_returns_correct_data_size_for_each_qRegisterInfo_launch_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_p_returns_correct_data_size_for_each_qRegisterInfo_launch_debugserver) (test case does not fall in any category of interest for this run)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_p_returns_correct_data_size_for_each_qRegisterInfo_launch_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_p_returns_correct_data_size_for_each_qRegisterInfo_launch_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_qThreadInfo_contains_thread_attach_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_qThreadInfo_contains_thread_attach_debugserver) (test case does not fall in any category of interest for this run)
Program aborted due to an unhandled Error:
Operation not permitted
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0. Program arguments: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/lldb-server gdbserver --attach=1594532 --reverse-connect [127.0.0.1]:51305
#0 0x00000000006a1fd8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Support/Unix/Signals.inc:834:13
#1 0x000000000069f725 llvm::sys::RunSignalHandlers() /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Support/Signals.cpp:105:18
#2 0x00000000006a2d91 SignalHandler(int, siginfo_t*, void*) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Support/Unix/Signals.inc:426:38
#3 0x0000792f1bf36330 (/lib/x86_64-linux-gnu/libc.so.6+0x45330)
#4 0x0000792f1bf8fb2c pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x9eb2c)
#5 0x0000792f1bf3627e raise (/lib/x86_64-linux-gnu/libc.so.6+0x4527e)
#6 0x0000792f1bf198ff abort (/lib/x86_64-linux-gnu/libc.so.6+0x288ff)
#7 0x000000000064f9c0 operator<< /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Support/raw_ostream.h:234:7
#8 0x000000000064f9c0 operator<< /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Support/raw_ostream.h:258:18
#9 0x000000000064f9c0 llvm::Error::fatalUncheckedError() const /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Support/Error.cpp:129:10
#10 0x00000000006d5ec1 lldb_private::process_linux::NativeProcessLinux::Attach(int) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Support/Error.h:0:7
#11 0x00000000006d53f8 operator bool /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Support/Error.h:576:17
#12 0x00000000006d53f8 lldb_private::process_linux::NativeProcessLinux::Manager::Attach(unsigned long, lldb_private::NativeProcessProtocol::NativeDelegate&) /home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp:316:8
#13 0x0000000000729868 operator bool /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Support/Error.h:576:17
#14 0x0000000000729868 lldb_private::process_gdb_remote::GDBRemoteCommunicationServerLLGS::AttachToProcess(unsigned long) /home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.cpp:362:8
#15 0x000000000062b6f8 handle_attach_to_pid /home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/tools/lldb-server/lldb-gdbserver.cpp:113:13
#16 0x000000000062b6f8 handle_attach(lldb_private::process_gdb_remote::GDBRemoteCommunicationServerLLGS&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>> const&) /home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/tools/lldb-server/lldb-gdbserver.cpp:138:5
#17 0x000000000062e107 hasArg<(anonymous namespace)::ID> /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Option/ArgList.h:246:31
#18 0x000000000062e107 main_gdbserver(int, char**) /home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/tools/lldb-server/lldb-gdbserver.cpp:416:26
#19 0x0000000000635904 load /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/atomic_base.h:837:9
#20 0x0000000000635904 load /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/atomic:577:21
#21 0x0000000000635904 operator* /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Support/ManagedStatic.h:89:21
#22 0x0000000000635904 operator-> /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Support/ManagedStatic.h:96:29
#23 0x0000000000635904 terminate_debugger /home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/tools/lldb-server/lldb-server.cpp:48:36
#24 0x0000000000635904 main /home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/tools/lldb-server/lldb-server.cpp:0:0
#25 0x0000792f1bf1b1ca (/lib/x86_64-linux-gnu/libc.so.6+0x2a1ca)
#26 0x0000792f1bf1b28b __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2a28b)
#27 0x000000000062b595 _start (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/lldb-server+0x62b595)
FAIL: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_qThreadInfo_contains_thread_attach_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_qThreadInfo_contains_thread_attach_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_qThreadInfo_contains_thread_launch_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_qThreadInfo_contains_thread_launch_debugserver) (test case does not fall in any category of interest for this run)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_qThreadInfo_contains_thread_launch_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_qThreadInfo_contains_thread_launch_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_qThreadInfo_matches_qC_attach_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_qThreadInfo_matches_qC_attach_debugserver) (test case does not fall in any category of interest for this run)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_qThreadInfo_matches_qC_attach_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_qThreadInfo_matches_qC_attach_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_qThreadInfo_matches_qC_launch_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_qThreadInfo_matches_qC_launch_debugserver) (test case does not fall in any category of interest for this run)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_qThreadInfo_matches_qC_launch_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_qThreadInfo_matches_qC_launch_llgs)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_qXfer_siginfo_read_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_qXfer_siginfo_read_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_software_breakpoint_set_and_remove_work_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_software_breakpoint_set_and_remove_work_debugserver) (test case does not fall in any category of interest for this run)
lldb-server exiting...
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_software_breakpoint_set_and_remove_work_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_software_breakpoint_set_and_remove_work_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_thread_suffix_supported_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_thread_suffix_supported_debugserver) (test case does not fall in any category of interest for this run)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_thread_suffix_supported_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_thread_suffix_supported_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_written_M_content_reads_back_correctly_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_written_M_content_reads_back_correctly_debugserver) (test case does not fall in any category of interest for this run)
lldb-server exiting...
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_written_M_content_reads_back_correctly_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_written_M_content_reads_back_correctly_llgs)

ERROR: test_qThreadInfo_contains_thread_attach_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_qThreadInfo_contains_thread_attach_llgs)

Traceback (most recent call last):
File "/home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/packages/Python/lldbsuite/test/tools/lldb-server/gdbremote_testcase.py", line 48, in test_method
return attrvalue(self)
^^^^^^^^^^^^^^^
File "/home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/test/API/tools/lldb-server/TestLldbGdbServer.py", line 163, in test_qThreadInfo_contains_thread_attach
self.qThreadInfo_contains_thread()
File "/home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/test/API/tools/lldb-server/TestLldbGdbServer.py", line 140, in qThreadInfo_contains_thread
procs = self.prep_debug_monitor_and_inferior()
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/packages/Python/lldbsuite/test/tools/lldb-server/gdbremote_testcase.py", line 526, in prep_debug_monitor_and_inferior
server = self.connect_to_debug_monitor(attach_pid=attach_pid)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/packages/Python/lldbsuite/test/tools/lldb-server/gdbremote_testcase.py", line 378, in connect_to_debug_monitor
server = self.launch_debug_monitor(attach_pid=attach_pid)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/packages/Python/lldbsuite/test/tools/lldb-server/gdbremote_testcase.py", line 370, in launch_debug_monitor
self.sock = sock.accept()[0]
^^^^^^^^^^^^^
File "/usr/lib/python3.12/socket.py", line 295, in accept
fd, addr = self._accept()
^^^^^^^^^^^^^^
TimeoutError: timed out
Config=x86_64-/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang

Ran 42 tests in 72.160s

FAILED (errors=1, skipped=20)

--

</details>

[llvmbot]

@llvm/issue-subscribers-lldb

Author: Nikita Popov (nikic)

I regularly see this one failing in pre-merge checks: ``` Script: -- /usr/bin/python3 /home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/test/API/dotest.py -u CXXFLAGS -u CFLAGS --env LLVM_LIBS_DIR=/home/gha/actions-runner/_work/llvm-project/llvm-project/build/./lib --env LLVM_INCLUDE_DIR=/home/gha/actions-runner/_work/llvm-project/llvm-project/build/include --env LLVM_TOOLS_DIR=/home/gha/actions-runner/_work/llvm-project/llvm-project/build/./bin --libcxx-include-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/include/c++/v1 --libcxx-include-target-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/include/x86_64-unknown-linux-gnu/c++/v1 --libcxx-library-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/./lib/x86_64-unknown-linux-gnu --arch x86_64 --build-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/lldb-test-build.noindex --lldb-module-cache-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/lldb-test-build.noindex/module-cache-lldb/lldb-api --clang-module-cache-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/lldb-test-build.noindex/module-cache-clang/lldb-api --executable /home/gha/actions-runner/_work/llvm-project/llvm-project/build/./bin/lldb --compiler /home/gha/actions-runner/_work/llvm-project/llvm-project/build/./bin/clang --dsymutil /home/gha/actions-runner/_work/llvm-project/llvm-project/build/./bin/dsymutil --make /usr/bin/gmake --llvm-tools-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/./bin --lldb-obj-root /home/gha/actions-runner/_work/llvm-project/llvm-project/build/tools/lldb --lldb-libs-dir /home/gha/actions-runner/_work/llvm-project/llvm-project/build/./lib --cmake-build-type Release /home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/test/API/tools/lldb-server -p TestLldbGdbServer.py -- Exit Code: 1

Command Output (stdout):

lldb version 22.0.0git (https://github.com/llvm/llvm-project revision c2d04cf8fdd2f3cb8ef4aa293a55e700312d0c6c)
clang revision c2d04cf8fdd2f3cb8ef4aa293a55e700312d0c6c
llvm revision c2d04cf8fdd2f3cb8ef4aa293a55e700312d0c6c
Skipping the following test categories: ['msvcstl', 'dsym', 'gmodules', 'debugserver', 'objc']

--
Command Output (stderr):

UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_Hc_then_Csignal_signals_correct_thread_launch_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_Hc_then_Csignal_signals_correct_thread_launch_debugserver) (test case does not fall in any category of interest for this run)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_Hc_then_Csignal_signals_correct_thread_launch_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_Hc_then_Csignal_signals_correct_thread_launch_llgs)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_Hg_fails_on_another_pid_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_Hg_fails_on_another_pid_llgs)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_Hg_fails_on_minus_one_pid_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_Hg_fails_on_minus_one_pid_llgs)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_Hg_fails_on_zero_pid_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_Hg_fails_on_zero_pid_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_Hg_switches_to_3_threads_launch_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_Hg_switches_to_3_threads_launch_debugserver) (test case does not fall in any category of interest for this run)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_Hg_switches_to_3_threads_launch_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_Hg_switches_to_3_threads_launch_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_P_and_p_thread_suffix_work_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_P_and_p_thread_suffix_work_debugserver) (test case does not fall in any category of interest for this run)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_P_and_p_thread_suffix_work_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_P_and_p_thread_suffix_work_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_P_writes_all_gpr_registers_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_P_writes_all_gpr_registers_debugserver) (test case does not fall in any category of interest for this run)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_P_writes_all_gpr_registers_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_P_writes_all_gpr_registers_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_attach_commandline_continue_app_exits_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_attach_commandline_continue_app_exits_debugserver) (test case does not fall in any category of interest for this run)
lldb-server exiting...
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_attach_commandline_continue_app_exits_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_attach_commandline_continue_app_exits_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_c_packet_works_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_c_packet_works_debugserver) (test case does not fall in any category of interest for this run)
lldb-server exiting...
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_c_packet_works_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_c_packet_works_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_first_launch_stop_reply_thread_matches_first_qC_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_first_launch_stop_reply_thread_matches_first_qC_debugserver) (test case does not fall in any category of interest for this run)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_first_launch_stop_reply_thread_matches_first_qC_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_first_launch_stop_reply_thread_matches_first_qC_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_hardware_breakpoint_set_and_remove_work_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_hardware_breakpoint_set_and_remove_work_debugserver) (test case does not fall in any category of interest for this run)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_hardware_breakpoint_set_and_remove_work_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_hardware_breakpoint_set_and_remove_work_llgs) (skipping due to the following parameter(s): architecture)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_inferior_print_exit_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_inferior_print_exit_debugserver) (test case does not fall in any category of interest for this run)
lldb-server exiting...
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_inferior_print_exit_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_inferior_print_exit_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_list_threads_in_stop_reply_supported_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_list_threads_in_stop_reply_supported_debugserver) (test case does not fall in any category of interest for this run)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_list_threads_in_stop_reply_supported_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_list_threads_in_stop_reply_supported_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_m_packet_reads_memory_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_m_packet_reads_memory_debugserver) (test case does not fall in any category of interest for this run)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_m_packet_reads_memory_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_m_packet_reads_memory_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_p_returns_correct_data_size_for_each_qRegisterInfo_launch_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_p_returns_correct_data_size_for_each_qRegisterInfo_launch_debugserver) (test case does not fall in any category of interest for this run)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_p_returns_correct_data_size_for_each_qRegisterInfo_launch_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_p_returns_correct_data_size_for_each_qRegisterInfo_launch_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_qThreadInfo_contains_thread_attach_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_qThreadInfo_contains_thread_attach_debugserver) (test case does not fall in any category of interest for this run)
Program aborted due to an unhandled Error:
Operation not permitted
PLEASE submit a bug report to https://github.com/llvm/llvm-project/issues/ and include the crash backtrace.
Stack dump:
0. Program arguments: /home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/lldb-server gdbserver --attach=1594532 --reverse-connect [127.0.0.1]:51305
#0 0x00000000006a1fd8 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Support/Unix/Signals.inc:834:13
#1 0x000000000069f725 llvm::sys::RunSignalHandlers() /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Support/Signals.cpp:105:18
#2 0x00000000006a2d91 SignalHandler(int, siginfo_t*, void*) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Support/Unix/Signals.inc:426:38
#3 0x0000792f1bf36330 (/lib/x86_64-linux-gnu/libc.so.6+0x45330)
#4 0x0000792f1bf8fb2c pthread_kill (/lib/x86_64-linux-gnu/libc.so.6+0x9eb2c)
#5 0x0000792f1bf3627e raise (/lib/x86_64-linux-gnu/libc.so.6+0x4527e)
#6 0x0000792f1bf198ff abort (/lib/x86_64-linux-gnu/libc.so.6+0x288ff)
#7 0x000000000064f9c0 operator<< /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Support/raw_ostream.h:234:7
#8 0x000000000064f9c0 operator<< /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Support/raw_ostream.h:258:18
#9 0x000000000064f9c0 llvm::Error::fatalUncheckedError() const /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/lib/Support/Error.cpp:129:10
#10 0x00000000006d5ec1 lldb_private::process_linux::NativeProcessLinux::Attach(int) /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Support/Error.h:0:7
#11 0x00000000006d53f8 operator bool /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Support/Error.h:576:17
#12 0x00000000006d53f8 lldb_private::process_linux::NativeProcessLinux::Manager::Attach(unsigned long, lldb_private::NativeProcessProtocol::NativeDelegate&) /home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp:316:8
#13 0x0000000000729868 operator bool /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Support/Error.h:576:17
#14 0x0000000000729868 lldb_private::process_gdb_remote::GDBRemoteCommunicationServerLLGS::AttachToProcess(unsigned long) /home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunicationServerLLGS.cpp:362:8
#15 0x000000000062b6f8 handle_attach_to_pid /home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/tools/lldb-server/lldb-gdbserver.cpp:113:13
#16 0x000000000062b6f8 handle_attach(lldb_private::process_gdb_remote::GDBRemoteCommunicationServerLLGS&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char>> const&) /home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/tools/lldb-server/lldb-gdbserver.cpp:138:5
#17 0x000000000062e107 hasArg<(anonymous namespace)::ID> /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Option/ArgList.h:246:31
#18 0x000000000062e107 main_gdbserver(int, char**) /home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/tools/lldb-server/lldb-gdbserver.cpp:416:26
#19 0x0000000000635904 load /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/bits/atomic_base.h:837:9
#20 0x0000000000635904 load /usr/lib/gcc/x86_64-linux-gnu/13/../../../../include/c++/13/atomic:577:21
#21 0x0000000000635904 operator* /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Support/ManagedStatic.h:89:21
#22 0x0000000000635904 operator-> /home/gha/actions-runner/_work/llvm-project/llvm-project/llvm/include/llvm/Support/ManagedStatic.h:96:29
#23 0x0000000000635904 terminate_debugger /home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/tools/lldb-server/lldb-server.cpp:48:36
#24 0x0000000000635904 main /home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/tools/lldb-server/lldb-server.cpp:0:0
#25 0x0000792f1bf1b1ca (/lib/x86_64-linux-gnu/libc.so.6+0x2a1ca)
#26 0x0000792f1bf1b28b __libc_start_main (/lib/x86_64-linux-gnu/libc.so.6+0x2a28b)
#27 0x000000000062b595 _start (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/lldb-server+0x62b595)
FAIL: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_qThreadInfo_contains_thread_attach_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_qThreadInfo_contains_thread_attach_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_qThreadInfo_contains_thread_launch_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_qThreadInfo_contains_thread_launch_debugserver) (test case does not fall in any category of interest for this run)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_qThreadInfo_contains_thread_launch_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_qThreadInfo_contains_thread_launch_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_qThreadInfo_matches_qC_attach_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_qThreadInfo_matches_qC_attach_debugserver) (test case does not fall in any category of interest for this run)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_qThreadInfo_matches_qC_attach_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_qThreadInfo_matches_qC_attach_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_qThreadInfo_matches_qC_launch_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_qThreadInfo_matches_qC_launch_debugserver) (test case does not fall in any category of interest for this run)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_qThreadInfo_matches_qC_launch_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_qThreadInfo_matches_qC_launch_llgs)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_qXfer_siginfo_read_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_qXfer_siginfo_read_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_software_breakpoint_set_and_remove_work_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_software_breakpoint_set_and_remove_work_debugserver) (test case does not fall in any category of interest for this run)
lldb-server exiting...
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_software_breakpoint_set_and_remove_work_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_software_breakpoint_set_and_remove_work_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_thread_suffix_supported_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_thread_suffix_supported_debugserver) (test case does not fall in any category of interest for this run)
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_thread_suffix_supported_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_thread_suffix_supported_llgs)
UNSUPPORTED: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_written_M_content_reads_back_correctly_debugserver (TestLldbGdbServer.LldbGdbServerTestCase.test_written_M_content_reads_back_correctly_debugserver) (test case does not fall in any category of interest for this run)
lldb-server exiting...
PASS: LLDB (/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang-x86_64) :: test_written_M_content_reads_back_correctly_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_written_M_content_reads_back_correctly_llgs)

ERROR: test_qThreadInfo_contains_thread_attach_llgs (TestLldbGdbServer.LldbGdbServerTestCase.test_qThreadInfo_contains_thread_attach_llgs)

Traceback (most recent call last):
File "/home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/packages/Python/lldbsuite/test/tools/lldb-server/gdbremote_testcase.py", line 48, in test_method
return attrvalue(self)
^^^^^^^^^^^^^^^
File "/home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/test/API/tools/lldb-server/TestLldbGdbServer.py", line 163, in test_qThreadInfo_contains_thread_attach
self.qThreadInfo_contains_thread()
File "/home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/test/API/tools/lldb-server/TestLldbGdbServer.py", line 140, in qThreadInfo_contains_thread
procs = self.prep_debug_monitor_and_inferior()
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/packages/Python/lldbsuite/test/tools/lldb-server/gdbremote_testcase.py", line 526, in prep_debug_monitor_and_inferior
server = self.connect_to_debug_monitor(attach_pid=attach_pid)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/packages/Python/lldbsuite/test/tools/lldb-server/gdbremote_testcase.py", line 378, in connect_to_debug_monitor
server = self.launch_debug_monitor(attach_pid=attach_pid)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/gha/actions-runner/_work/llvm-project/llvm-project/lldb/packages/Python/lldbsuite/test/tools/lldb-server/gdbremote_testcase.py", line 370, in launch_debug_monitor
self.sock = sock.accept()[0]
^^^^^^^^^^^^^
File "/usr/lib/python3.12/socket.py", line 295, in accept
fd, addr = self._accept()
^^^^^^^^^^^^^^
TimeoutError: timed out
Config=x86_64-/home/gha/actions-runner/_work/llvm-project/llvm-project/build/bin/clang

Ran 42 tests in 72.160s

FAILED (errors=1, skipped=20)

--

</details>

[DavidSpickett]

The mentioned PR I think will improve the error reporting. The test will still fail but not crash in doing so.

There's a small chance we get a better error telling us something about Yama ptrace_scope (which I don't know anything about), but more likely it's just failed to attach for some reason.

Unless we have several kinds of Linux instance and some have different settings, but if that were the case I'd expect 100s of failures because attaching is something we do a lot.

TimeoutError: timed out

This could suggest we waited for the process and timed out doing that, but we also have a bad habit of converting failures within a test into timeouts at the test runner level. I'm not sure how we manage that but sometimes if you have an error deep enough, it doesn't propagate up. Also it's a Python frame, so it's not within LLDB itself.

The connection is established by:

    def launch_debug_monitor(self, attach_pid=None, logfile=None):
        if self.reverse_connect:
            family, type, proto, _, addr = socket.getaddrinfo(
                "localhost", 0, proto=socket.IPPROTO_TCP
            )[0]
            sock = socket.socket(family, type, proto)
            sock.settimeout(self.DEFAULT_TIMEOUT)

            sock.bind(addr)
            sock.listen(1)
            addr = sock.getsockname()
            self.connect_address = "[{}]:{}".format(*addr)

And DEFAULT_TIMEOUT is 20 seconds.

As this is the connection from the debug client to the debug server, I think the server was crashing and the client is waiting the full 20s as a result. So increasing this timeout won't help with this failure.

We might have a race in creating the process we later attach to, I will look for that.

[DavidSpickett]

The debugee for these tests includes this:

int main(int argc, char **argv) {
  lldb_enable_attach();

Aka:

// For now we execute on best effort basis.  If this fails for some reason, so
// be it.
#define lldb_enable_attach()                                                   \
  do {                                                                         \
    const int prctl_result =                                                   \
        prctl(PR_SET_PTRACER, PR_SET_PTRACER_ANY, 0, 0, 0);                    \
    (void)prctl_result;                                                        \
  } while (0)

So one theory is that lldb-server could be trying to attach before this call has executed, on a system that has this Yama set to 1:

1 - restricted ptrace: a process must have a predefined relationship
    with the inferior it wants to call PTRACE_ATTACH on. By default,
    this relationship is that of only its descendants when the above
    classic criteria is also met. To change the relationship, an
    inferior can call prctl(PR_SET_PTRACER, debugger, ...) to declare
    an allowed debugger PID to call PTRACE_ATTACH on the inferior.
    Using PTRACE_TRACEME is unchanged.

I will have time to try this theory tomorrow.

@boomanaiden154 is it possible to find out the value on the CI machines?

Locally I can check with:

$ cat /proc/sys/kernel/yama/ptrace_scope
1

[DavidSpickett]

I can reproduce this by running the test in a loop with stress running enough processes to make the machine very busy. Also I can make it fail every time with this change:

int main(int argc, char **argv) {
  sleep(1); // Simulate the process not being scheduled for a while.
  lldb_enable_attach();

And with my PR applied we get a better error message:

failed to attach to process 327017: The current value of ptrace_scope is 1, which can cause ptrace to fail to attach to a running process. To fix this, run:
	sudo sysctl -w kernel.yama.ptrace_scope=0
For more information, see: https://www.kernel.org/doc/Documentation/security/Yama.txt.
error: failed to attach to pid 327017: The current value of ptrace_scope is 1, which can cause ptrace to fail to attach to a running process. To fix this, run:
	sudo sysctl -w kernel.yama.ptrace_scope=0
For more information, see: https://www.kernel.org/doc/Documentation/security/Yama.txt.
FAIL: LLDB (/home/davspi01/work/open_source/build-llvm/bin/clang-x86_64) :: test_qThreadInfo_contains_thread_attach_llgs (TestLldbGdbServer.LldbGdbServerTestCase)
======================================================================
ERROR: test_qThreadInfo_contains_thread_attach_llgs (TestLldbGdbServer.LldbGdbServerTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/davspi01/work/open_source/llvm-project/lldb/packages/Python/lldbsuite/test/tools/lldb-server/gdbremote_testcase.py", line 48, in test_method
    return attrvalue(self)
  File "/home/davspi01/work/open_source/llvm-project/lldb/test/API/tools/lldb-server/TestLldbGdbServer.py", line 32, in test_qThreadInfo_contains_thread_attach
    procs = self.prep_debug_monitor_and_inferior()
  File "/home/davspi01/work/open_source/llvm-project/lldb/packages/Python/lldbsuite/test/tools/lldb-server/gdbremote_testcase.py", line 526, in prep_debug_monitor_and_inferior
    server = self.connect_to_debug_monitor(attach_pid=attach_pid)
  File "/home/davspi01/work/open_source/llvm-project/lldb/packages/Python/lldbsuite/test/tools/lldb-server/gdbremote_testcase.py", line 378, in connect_to_debug_monitor
    server = self.launch_debug_monitor(attach_pid=attach_pid)
  File "/home/davspi01/work/open_source/llvm-project/lldb/packages/Python/lldbsuite/test/tools/lldb-server/gdbremote_testcase.py", line 370, in launch_debug_monitor
    self.sock = sock.accept()[0]
  File "/usr/lib/python3.10/socket.py", line 293, in accept
    fd, addr = self._accept()
TimeoutError: timed out
Config=x86_64-/home/davspi01/work/open_source/build-llvm/bin/clang
----------------------------------------------------------------------

Maybe we shouldn't print this twice, but at least we won't miss it :)

We can add delays all we want but if any of the processes is delayed by enough time, something will fail. I think we may be able to write something from the debugee to tell the test framework that attaching is now allowed.

[DavidSpickett]

GDB's test suite has an equivalent of REQUIRES: and skips tests that need to attach, if it finds that it cannot attach to any process. Linaro's machines running the GDB test suite ensure the setting is set to 0.

Getting this to sync properly is going to be messy, so I think we should:

• Set the Yama setting to 0 on the CI machines, if we can, and we are ok with the security implications (if we can't change it, the loss of coverage shouldn't be that high).
• Also annotate the attach tests in the way GDB does.

[nikic]

@DavidSpickett I found this comment on a previous issue, in case it may be useful: #138085 (comment)

[DavidSpickett]

Oh cool, maybe we wrote a sync mechanism already. I'll look at it next week.