[Mono-list] Cannot run or build Mono on SPARC V8 / Solaris 9

[Jonathan Zimmerman]

I have resolved the issue I previously identified: 
mono/arch/sparc-codegen.h has a macro called sparc_flushw that uses a 
SPARC V9 instruction that flushes all register windows.  The V8 
instruction set includes an instruction with the same opcode, however as 
the V8 instruction is a privileged instruction a SIGILL is raised when 
attempting to use code that includes the sparc_flushw macor.
As a convenience Solaris 9 provides a software trap that will accomplish 
the same thing, so it is just a matter of using an #ifdef SPARCV9 in 
sparc-codegen.h to use the hardware instruction if we're being build in 
a V9 processor or the software trap if we're being build on a V8 (or V7) 
processor.  After applying the provided patch I am able to get past the 
SIGILL issue.

However, when trying to compile anything via mcs.exe I get the following 
error:
Unhandled Exception: System.TypeInitializationException: An exception 
was thrown by the type initializer for Mono.CSharp.Location ---> 
System.ArgumentOutOfRangeException: load factor
Parameter name: loadFactor
in <0x002b8> System.Collections.Hashtable:.ctor (Int32 capacity, Single 
loadFactor, IHashCodeProvider hcp, IComparer comparer)
in <0x0002c> System.Collections.Hashtable:.ctor (Int32 capacity, Single 
loadFactor)
in <0x00024> System.Collections.Hashtable:.ctor ()
in <0x00030> Mono.CSharp.Location:.cctor ()--- End of inner exception 
stack trace ---

in <0x00000> <unknown method>
in <0x0000c> Mono.CSharp.Driver:Main (System.String[] args)
This error happens on both mono 1.1.9 and mono 1.1.13.8; I have not been 
able to get past it.

I disassembled the basic mscorlib.dll and saw that the default 
loadFactor value is 1f.  How is it possible that in the Hashtable 
constructor(Int32, Single, IHashCodeProvider , IComparer) the loadFactor 
value is being seen as not 1.0?

Thanks!

tyrius at verizon.net wrote:
> When I try to use the prepared Mono 1.1.13.8 package on a SPARCStation 5/170 running Solaris 9 I get this error:
>   cannot execute binary file.
>
> file `which mono` produces this output:
>   ELF 32-bit MSB executable SPARC32PLUS Version 1, V8+ Required, dynamically linked, stripped
>
> I believe the problem here is that the mono executable was compiled on a SPARC V8+, but the cpu on my machine is a V8.
>
> I have attempted to rebuild Mono on my own (a very slow process on this machine), but that fails with a different problem.  During the build process I get the following (note the Illegal Instruction - core dumped):
> gmake[6]: Entering directory `/home/tyrius/src/mono-1.1.13.8/mcs'
> *** The compiler 'mcs' doesn't appear to be usable.
> *** Trying the 'monolite' directory.
> gmake[7]: Entering directory `/home/tyrius/src/mono-1.1.13.8/mcs'
> Illegal Instruction - core dumped
> gmake[8]: *** [build/deps/basic-profile-check.exe] Error 132
> gmake[8]: Entering directory `/home/tyrius/src/mono-1.1.13.8/mcs'
> *** The contents of your 'monolite' directory may be out-of-date
> *** You may want to try 'make get-monolite-latest'
> gmake[8]: *** [do-profile-check-monolite] Error 1
> gmake[8]: Leaving directory `/home/tyrius/src/mono-1.1.13.8/mcs'
> gmake[7]: *** [do-profile-check] Error 2
> gmake[7]: Leaving directory `/home/tyrius/src/mono-1.1.13.8/mcs'
> gmake[6]: *** [do-profile-check-monolite] Error 2
> gmake[6]: Leaving directory `/home/tyrius/src/mono-1.1.13.8/mcs'
> gmake[5]: *** [do-profile-check] Error 2
> gmake[5]: Leaving directory `/home/tyrius/src/mono-1.1.13.8/mcs'
> gmake[4]: *** [profile-do--basic--all] Error 2
> gmake[4]: Leaving directory `/home/tyrius/src/mono-1.1.13.8/mcs'
> gmake[3]: *** [profiles-do--all] Error 2
> gmake[3]: Leaving directory `/home/tyrius/src/mono-1.1.13.8/mcs'
> gmake[2]: *** [all-local] Error 2
> gmake[2]: Leaving directory `/home/tyrius/src/mono-1.1.13.8/runtime'
> gmake[1]: *** [all-recursive] Error 1
> gmake[1]: Leaving directory `/home/tyrius/src/mono-1.1.13.8'
> gmake: *** [all] Error 2
>
> I find it a little puzzling: I've tried to use GDB to see where the illegal instruction is coming from, but in sigill_signal_handler info->si_code == 0.
>
> Here is the backtrace from GDB:
> #0  sigill_signal_handler (_dummy=4, info=0xefffebd0, context=0xefffea10) at mini.c:9924
> #1  0xef2c5b14 in __sighndlr () from /usr/lib/libthread.so.1
> #2  0xef2bf80c in call_user_handler () from /usr/lib/libthread.so.1
> #3  <signal handler called>
> #4  0xef1f0010 in ?? ()
> #5  0xee8628b4 in ?? ()
> #6  0xee8627e8 in ?? ()
> #7  0x0016e544 in mono_jit_runtime_invoke (method=0x308910, obj=0x271f90, params=0xeffff4e8, exc=<incomplete type>) at mini.c:9869
> #8  0x000a3800 in mono_runtime_invoke (method=0x308910, obj=0x271f90, params=0xeffff4e8, exc=<incomplete type>) at object.c:1352
> #9  0x000d3f1c in mono_exception_from_name_two_strings (image=0x271f90, name_space=0x0, name=0x31b360 "", a1=0x30bfc8, a2=0x0) at exception.c:142
> #10 0x000d4894 in mono_runtime_init (domain=<incomplete type>, start_cb=0x166e48 <mono_thread_start_cb>, attach_cb=0x166ef4 <mono_thread_attach_cb>) at appdomain.c:123
> #11 0x0016f8bc in mini_init (filename=0xeffff975 "/home/tyrius/src/mono-1.1.13.8/mcs/class/lib/monolite/mcs.exe") at mini.c:10492
> #12 0x000263e8 in mono_main (argc=6, argv=0xeffff7cc) at driver.c:867
> #13 0x00023ba0 in main (argc=6, argv=0xeffff7cc) at main.c:6
>
> the box I'm doing this on is a hobbyist box and I don't have the luxury of replacing it with something that has a SPARC V9 cpu, so I'd really like to get this working on a SPARC V8.
>
> Thank you,
>
> Jonathan Zimmerman
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