Endless loop in UnwindManagedExceptionPass1 on ARM64

[chingchenms]

The exception is because the native dll has some dependence not there, and triggers a type initiation exception,
This is a bug in this UnwindManagedExceptionPass1, it never exit, using lldb has clear proved it, I hope someone can fix it .

(lldb) bt

• thread Merge changes from TFS coreclr#1, name = 'dotnet', stop reason = signal SIGSTOP
  • frame #0: 0x0000007fa5f3f7ec libcoreclr.so_ULaarch64_access_reg + 40 frame dotnet/coreclr#1: 0x0000007fa5f061f0 libcoreclr.soUnwindContextToWinContext(unw_cursor*, _CONTEXT*) + 224
    frame Merge changes from TFS coreclr#2: 0x0000007fa5f06648 libcoreclr.soPAL_VirtualUnwind + 292 frame dotnet/coreclr#3: 0x0000007fa5cc66f0 libcoreclr.soUnwindManagedExceptionPass1(PAL_SEHException&, _CONTEXT*) + 396
    frame Changes to Miscellaneous test project and runtest coreclr#4: 0x0000007fa5cc6950 libcoreclr.soDispatchManagedException(PAL_SEHException&, bool) + 256 frame dotnet/coreclr#5: 0x0000007fa5c50ac8 libcoreclr.soJIT_GetSharedNonGCStaticBase_Helper + 564
    frame Add build status badge coreclr#6: 0x0000007f2dab2c8c
    frame Build status table coreclr#7: 0x0000007f2d50d454
    frame Clean up runtest script coreclr#8: 0x0000007fa5cccf84 libcoreclr.soCallDescrWorkerInternal + 132 frame dotnet/coreclr#9: 0x0000007fa5c133b0 libcoreclr.soMethodDescCallSite::CallTargetWorker(unsigned long const*, unsigned long*, int) + 1120
    frame Linux release build coreclr#10: 0x0000007fa5cec120 libcoreclr.soRunMain(MethodDesc*, short, int*, PtrArray**) + 660 frame dotnet/coreclr#11: 0x0000007fa5cec44c libcoreclr.soAssembly::ExecuteMainMethod(PtrArray**, int) + 380
    frame Add release build badge for linux now that it's working coreclr#12: 0x0000007fa5b60004 libcoreclr.soCorHost2::ExecuteAssembly(unsigned int, char16_t const*, int, char16_t const**, unsigned int*) + 480 frame dotnet/coreclr#13: 0x0000007fa5b3b6ec libcoreclr.socoreclr_execute_assembly + 232
    frame Merge changes from TFS coreclr#14: 0x0000007fa62eb9c8 libhostpolicy.so___lldb_unnamed_symbol1629$$libhostpolicy.so + 144 frame dotnet/coreclr#15: 0x0000007fa62ddc28 libhostpolicy.so___lldb_unnamed_symbol1314$$libhostpolicy.so + 4820
    frame Fix links to Linux build badge coreclr#16: 0x0000007fa62de348 libhostpolicy.socorehost_main + 184 frame dotnet/coreclr#17: 0x0000007fa63b2664 libhostfxr.so___lldb_unnamed_symbol1620$$libhostfxr.so + 240
    frame Update job names coreclr#18: 0x0000007fa63bc05c libhostfxr.so___lldb_unnamed_symbol1694$$libhostfxr.so + 3628 frame dotnet/coreclr#19: 0x0000007fa63bce4c libhostfxr.so___lldb_unnamed_symbol1697$$libhostfxr.so + 432
    frame Fix mscorlib warnings. coreclr#20: 0x0000007fa63bc578 libhostfxr.so___lldb_unnamed_symbol1695$$libhostfxr.so + 796 frame dotnet/coreclr#21: 0x0000007fa63b28c4 libhostfxr.sohostfxr_main_startupinfo + 172
    frame Fix typo coreclr#22: 0x000000000040da6c dotnet___lldb_unnamed_symbol29$$dotnet + 1364 frame dotnet/coreclr#23: 0x000000000040dcc8 dotnet___lldb_unnamed_symbol30$$dotnet + 168
    frame Update README.md coreclr#24: 0x0000007fa64338a0 libc.so.6__libc_start_main(main=0x0000000000000000, argc=0, argv=0x0000000000000000, init=<unavailable>, fini=<unavailable>, rtld_fini=<unavailable>, stack_end=<unavailable>) at libc-start.c:291 frame dotnet/runtime#3858: 0x000000000040bbb0 dotnet_start + 40

(lldb) clrstack
OS Thread Id: 0x2773 (1)
Child SP IP Call Site
0000007FF741CC90 0000000000000000 [HelperMethodFrame: 0000007ff741cc90]
0000007FF741CE00 0000007F2DAB2C8C System.Fabric.FabricDeployer.DeployerTrace.WriteError(System.String, System.Object[])
0000007FF741CE20 0000007F2D50D454 System.Fabric.FabricDeployer.Program.Main(System.String[]) [/home/chingc/wf/src/prod/Setup/FabricDeployer/Program.cs @ 40]
0000007FF741DD50 0000007fa5ccc934 [HelperMethodFrame: 0000007ff741dd50]
0000007FF741DEC0 0000007F2D50EDFC System.Fabric.FabricDeployer.DeployerTrace.WriteInfo(System.String, System.Object[])
0000007FF741DEE0 0000007F2D50D2D0 System.Fabric.FabricDeployer.Program.Main(System.String[]) [/home/chingc/wf/src/prod/Setup/FabricDeployer/Program.cs @ 23]
0000007FF741E288 0000007fa5cccf84 [GCFrame: 0000007ff741e288]
0000007FF741E688 0000007fa5cccf84 [GCFrame: 0000007ff741e688] frame #3858: 0x000000000040bbb0 dotnet`_start + 40

[janvorli]

@chingchenms would you be able to provide a simple repro code that I can use to debug the issue? It looks like there may be a problem with the native unwinder library not unwinding some native frame correctly.

[RussKeldorph]

Removing blocking label until we get an actionable repro. @chingchenms Any chance you could provide more information?

[mangod9]

Closing this issue since this is old. If this still repros please reactivate.