[SR-3274] Failed to launch REPL process on LFS

[swift-ci]

Previous ID	SR-3274
Radar	None
Original Reporter	Vladislav (JIRA User)
Type	Bug
Status	Closed
Resolution	Cannot Reproduce

Environment

uname -a
Linux hp-ved-lfs 4.9.5 #1 SMP Sun Jan 22 18:46:36 MSK 2017 x86_64 GNU/Linux

clang --version
clang version 3.9.1 (tags/RELEASE_391/final)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /usr/bin

python --version
Python 2.7.13

python3 --version
Python 3.6.0

ld.gold --version
GNU gold (GNU Binutils 2.27) 1.12

Additional Detail from JIRA

Votes	0
Component/s	LLDB for Swift
Labels	Bug, Linux
Assignee	None
Priority	Medium

md5: f30af74aae64244b6e562979abe8ad2c

relates to:

• SR-3273 1 test unexpected failure on Linux From Scratch (LFS)

Issue Description:

Today I was trying to install Swift on Linux From Scratch. Build phase was OK except of one unexpected test failure. But after swift installation in /usr REPL did not start. I got the following error:

$ swift
error: failed to launch REPL process: process exited with status -1 (debugserver died with signal SIGSEGV)

Looking into system journal I saw the following:
ноя 26 14:59:46 hp-ved-lfs kernel: traps: lldb-server[10498] general protection ip:6e32b5 sp:7ffca827bd40 error:0 in lldb-server-4.0.0[400000+2e6f000]
ноя 26 14:59:46 hp-ved-lfs systemd[1]: Started Process Core Dump (PID 10505/UID 0).
ноя 26 14:59:47 hp-ved-lfs systemd-coredump[10506]: Process 10498 (lldb-server) of user 1000 dumped core.

What is the reason for failure? How to diagnose it?
swift --version
Swift version 3.0-dev (LLVM afd22915a8, Clang 405fbce562, Swift da36a13)
Target: x86_64-unknown-linux-gnu

[swift-ci]

Comment by Vladislav Dembskiy (JIRA)

I did reproduce the problem with more debug information. Today repository clone
All test passed except of one. I have already reported them in two bug reports about Gentoo and LFS: SR-3273 and SR-2966

Current version:
ved [ ~ ]$ swift --version
Swift version 3.0-dev (LLVM 935a554dfe, Clang ef30802eb3, Swift 03e8394)
Target: x86_64-unknown-linux-gnu

Trying to start REPL failed:
ved [ ~ ]$ swift
error: failed to launch REPL process: process exited with status -1 (debugserver died with signal SIGSEGV)

The system log is following:
дек 02 23:19:09 hp-ved-lfs kernel: traps: lldb-server[31422] general protection ip:6e3315 sp:7fffe4b91ac0 error:0 in lldb-server-4.0.0[400000+2e86000]
дек 02 23:19:09 hp-ved-lfs systemd[1]: Started Process Core Dump (PID 31429/UID 0).
дек 02 23:19:10 hp-ved-lfs systemd-coredump[31430]: Process 31422 (lldb-server) of user 1000 dumped core.

Stack trace of thread 31422:
#0 0x00000000006e3315 _ZN12lldb_private13process_linux33NativeRegisterContextLinux_x86_64C2ERKNS_8ArchSpecERNS_20NativeThreadProtocolEj (lldb-server-4.0.0)
#1 0x00000000006e31fe _ZN12lldb_private13process_linux26NativeRegisterContextLinux36CreateHostNativeRegisterContextLinuxERKNS_8ArchSpecERNS_20NativeThreadProtocolEj (lldb-server-4.0.0)
#2 0x00000000006e1725 _ZN12lldb_private13process_linux17NativeThreadLinux18GetRegisterContextEv (lldb-server-4.0.0)
#3 0x000000000064d0a0 _ZL18GetJSONThreadsInfoRN12lldb_private21NativeProcessProtocolEb (lldb-server-4.0.0)
#4 0x000000000064c56d _ZN12lldb_private18process_gdb_remote32GDBRemoteCommunicationServerLLGS28SendStopReplyPacketForThreadEm (lldb-server-4.0.0)
#5 0x0000000000650211 ZNSt17_Function_handlerIFN12lldb_private18process_gdb_remote22GDBRemoteCommunication12PacketResultER24StringExtractorGDBRemoteRNS0_5ErrorERbS8_EZNS1_34GDBRemoteCommunicationServerCommon29RegisterMemberFunctionHandlerINS1_32GDBRemoteCommunicationServerLLGSEEEvNS4_16ServerPacketTypeEMT_FS3_S5_EEUlS4_S7_S8_S8_E_E9_M_invokeERKSt9_Any_dataS5_S7_S8_S8 (lldb-server-4.0.0)
#6 0x000000000063fe3f ZN12lldb_private18process_gdb_remote28GDBRemoteCommunicationServer24GetPacketAndSendResponseEjRNS_5ErrorERbS4 (lldb-server-4.0.0)
#7 0x000000000064f103 _ZN12lldb_private18process_gdb_remote32GDBRemoteCommunicationServerLLGS21DataAvailableCallbackEv (lldb-server-4.0.0)
#8 0x000000000047854f _ZN12lldb_private13MainLoopPosix3RunEv (lldb-server-4.0.0)
#9 0x000000000041ef98 _Z14main_gdbserveriPPc (lldb-server-4.0.0)
#10 0x0000000000420f0a main (lldb-server-4.0.0)
#11 0x00007fd04f8932a1 __libc_start_main (libc.so.6)
#12 0x000000000041cf5a _start (lldb-server-4.0.0)

[swift-ci]

Comment by Vladislav Dembskiy (JIRA)

I close the issue because current I have build sucessfully Swift on current version of development versions of LFS and BLFS. Still one test failure but REPL is working.

[swift-ci]

Comment by Vladislav Dembskiy (JIRA)

With the current versions of LFS and Swift the problem appeared again.
The error message:
ved [ ~ ]$ swift
error: failed to launch REPL process: process exited with status -1 (debugserver died with signal SIGSEGV)

ved [ ~ ]$ uname -a
Linux hp-ved-lfs 4.9.5 #1 SMP Sun Jan 22 18:46:36 MSK 2017 x86_64 GNU/Linux

ved [ ~ ]$ lldb --version
lldb version 4.0.0 (https://github.com/apple/swift-lldb.git revision 24f4965fb07e9865f99316bc2a47f6bd2d23a719)
Swift-3.1 (revision 19ef6f3)
clang revision f2b4460c4831bce0fc77038636aec15e7a468575
llvm revision 5b1e5319a0456f39dcfb08bcc1e0fd67da6ef323

journalctl log:
Jan 22 20:01:15 hp-ved-lfs kernel: traps: lldb-server[23349] general protection ip:702c45 sp:7ffcf2362f30 error:0
Jan 22 20:01:15 hp-ved-lfs kernel: in lldb-server-4.0.0[400000+3563000]
Jan 22 20:01:15 hp-ved-lfs systemd[1]: Started Process Core Dump (PID 23353/UID 0).
Jan 22 20:01:16 hp-ved-lfs systemd-coredump[23354]: Process 23349 (lldb-server) of user 1000 dumped core.

Stack trace of thread 23349:
#0 0x0000000000702c45 _ZN12lldb_private13process_linux33NativeRegisterContextLinux_x86_64C2ERKNS_8ArchSpecERNS_20NativeThreadProtocolEj (lldb-server-4.0.0)
#1 0x0000000000702b2e _ZN12lldb_private13process_linux26NativeRegisterContextLinux36CreateHostNativeRegisterContextLinuxERKNS_8ArchSpecERNS_20NativeThreadProtocolEj (lldb-server-4.0.0)
#2 0x0000000000701055 _ZN12lldb_private13process_linux17NativeThreadLinux18GetRegisterContextEv (lldb-server-4.0.0)
#3 0x000000000066b7f0 _ZL18GetJSONThreadsInfoRN12lldb_private21NativeProcessProtocolEb (lldb-server-4.0.0)
#4 0x000000000066adad _ZN12lldb_private18process_gdb_remote32GDBRemoteCommunicationServerLLGS28SendStopReplyPacketForThreadEm (lldb-server-4.0.0)
#5 0x000000000066e991 ZNSt17_Function_handlerIFN12lldb_private18process_gdb_remote22GDBRemoteCommunication12PacketResultER24StringExtractorGDBRemoteRNS0_5ErrorERbS8_EZNS1_34GDBRemoteCommunicationServerCommon29RegisterMemberFunctionHandlerINS1_32GDBRemoteCommunicationServerLLGSEEEvNS4_16ServerPacketTypeEMT_FS3_S5_EEUlS4_S7_S8_S8_E_E9_M_invokeERKSt9_Any_dataS5_S7_S8_S8 (lldb-server-4.0.0)
#6 0x000000000065e63f ZN12lldb_private18process_gdb_remote28GDBRemoteCommunicationServer24GetPacketAndSendResponseEjRNS_5ErrorERbS4 (lldb-server-4.0.0)
#7 0x000000000066d883 _ZN12lldb_private18process_gdb_remote32GDBRemoteCommunicationServerLLGS21DataAvailableCallbackEv (lldb-server-4.0.0)
#8 0x0000000000493cbf _ZN12lldb_private13MainLoopPosix3RunEv (lldb-server-4.0.0)
#9 0x0000000000438328 _Z14main_gdbserveriPPc (lldb-server-4.0.0)
#10 0x000000000043a29a main (lldb-server-4.0.0)
#11 0x00007fadb2a862a1 __libc_start_main (libc.so.6)
#12 0x00000000004362ea _start (lldb-server-4.0.0)

[swift-ci]

Comment by Vladislav Dembskiy (JIRA)

REPL is working after yesterday's checkout.