[Mono-dev] Crash with sgen on x86_64-apple-darwin

[Rodrigo Kumpera]

Mono on 64bits darwin remains experimental and sgen in particular hás not
been portes yet.

On Tuesday, November 1, 2011, David Mitchell <dmitchell at logos.com> wrote:
> I've been experimenting with running Mono built for x86_64 on OS X. I've
been largely successful using Boehm GC, but today I tried running an app
with —gc=sgen, and I got an immediate crash (if there's output early in the
program, I may get a line or two), even with the simplest programs.
> My arguments to autogen.sh looked something like this:
> ./autogen.sh --with-xen_opt=no --prefix=$MONO_INSTALL_DIRECTORY
--with-mcs-docs=no --disable-nls --build=x86_64-apple-darwin
> And my super-simple C# program looks like this:
> using System;
> internal static class Program
> {
> private static void Main()
> {
> Console.WriteLine("hi");
> }
> }
> Can anyone else replicate my result? Does anyone have an idea for a fix?
> — Dave
> P.S. - Here's the stacktrace I get:
> Stacktrace:
>
> Native stacktrace:
> 0   mono-sgen                           0x0000000100081994
mono_handle_native_sigsegv + 276
> 1   mono-sgen                           0x00000001000036ea
mono_sigsegv_signal_handler + 202
> 2   libSystem.B.dylib                   0x00007fff826641ba _sigtramp + 26
> 3   ???                                 0x000000000000006b 0x0 + 107
> 4   mono-sgen                           0x00000001001bc5dd
mono_sgen_suspend_thread + 173
> 5   mono-sgen                           0x00000001001bc74d
mono_sgen_thread_handshake + 157
> 6   mono-sgen                           0x0000000100198f41 stop_world +
273
> 7   mono-sgen                           0x00000001001a2e84
mono_gc_collect + 52
> 8   mono-sgen                           0x000000010010d14d
mono_domain_finalize + 77
> 9   mono-sgen                           0x0000000100001a6a mini_cleanup +
42
> 10  mono-sgen                           0x000000010005d04d mono_main +
8189
> 11  mono-sgen                           0x0000000100000e04 start + 52
> 12  ???                                 0x0000000000000003 0x0 + 3
> Debug info from gdb:
> Cannot access memory at address 0x0
> Attaching to process 43936.
> Reading symbols for shared libraries . done
> Reading symbols for shared libraries .......... done
> 0x00007fff8260e464 in read ()
>   2                         0x00007fff82603db6 in semaphore_wait_trap ()
> * 1 "com.apple.main-thread" 0x00007fff8260e464 in read ()
> Thread 2 (process 43936):
> #0  0x00007fff82603db6 in semaphore_wait_trap ()
> #1  0x0000000100203818 in mono_sem_wait (sem=) at mono-semaphore.c:115
> #2  0x000000010010c362 in finalizer_thread (unused=0x1d03) at gc.c:1073
> #3  0x00000001001c91fe in start_wrapper_internal [inlined] () at
/Users/dmitchell/External/mono/mono/metadata/threads.c:571
> #4  0x00000001001c91fe in start_wrapper (data=0x100532830) at
threads.c:619
> #5  0x00000001001f8cc3 in thread_start_routine (args=0x10087abf8) at
wthreads.c:290
> #6  0x0000000100205216 in inner_start_thread (arg=0x1005322d0) at
mono-threads-posix.c:49
> #7  0x00007fff8263cfd6 in _pthread_start ()
> #8  0x00007fff8263ce89 in thread_start ()
> Thread 1 (process 43936):
> #0  0x00007fff8260e464 in read ()
> #1  0x0000000100081af2 in mono_handle_native_sigsegv (signal=43936,
ctx=0x7fff5fbfe3f0) at mini-exceptions.c:2256
> #2  0x00000001000036ea in mono_sigsegv_signal_handler (_dummy=11,
info=0x7fff5fbfec90, context=0x7fff5fbfecf8) at mini.c:5904
> #3  <signal handler called>
> #4  0x00000001001fd7f6 in mono_mach_arch_get_tls_value_from_thread
(thread=0x102a01000, key=4294967295) at mach-support-amd64.c:94
> #5  0x00000001001bc5dd in mono_sgen_suspend_thread (info=0x102b00000) at
sgen-os-mach.c:77
> #6  0x00000001001bc74d in mono_sgen_thread_handshake (suspend=1606414816)
at sgen-os-mach.c:127
> #7  0x0000000100198f41 in stop_world () at sgen-gc.c:6133
> #8  0x00000001001a2e84 in mono_gc_collect (generation=1) at sgen-gc.c:6369
> #9  0x000000010010d14d in mono_domain_finalize (domain=0x10050a820,
timeout=2000) at gc.c:366
> #10 0x0000000100001a6a in print_jit_stats [inlined] () at
/Users/dmitchell/External/mono/mono/mini/mini.c:6702
> #11 0x0000000100001a6a in mini_cleanup (domain=0x10050a820) at mini.c:6706
> #12 0x000000010005d04d in mono_main (argc=1606415312,
argv=0x7fff5fbff3d0) at driver.c:1905
> #13 0x0000000100000e04 in start ()
> =================================================================
> Got a SIGSEGV while executing native code. This usually indicates
> a fatal error in the mono runtime or one of the native libraries
> used by your application.
> =================================================================
> Abort trap
>
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