Found the issue and created PR 1839: https://github.com/mono/mono/pull/1839
Please take a look and let me know if you have any concerns with the fix.
Thanks,
Dave
On May 28, 2015, at 3:51 PM, David Curylo <cury...@asme.org> wrote:
> I’m researching an issue reported by a colleague of mine. The error is
> rather serious as the use of a bad type name causes a native SIGSEGV and
> kills the runtime, when it really should just return a null because it can’t
> find the type. This code reproduces the issue:
>
> System.Type.GetType("System.Nullable`1[[System.Int32, mscorlibBAD]]")
>
> Since I see there is some work going on with System.Type, I was hopeful that
> mono master would no longer have this issue, but it still exists. This is
> what I’m getting in the thread dump when this occurs and the root cause
> appears to be somewhere in _mono_reflection_get_type_from_info. Any ideas
> what may be the root cause here?
>
>
> Thread 1 (Thread 0x7f28ae81f7c0 (LWP 76562)):
> #0 0x00007f28adcf7ee9 in __libc_waitpid (pid=pid@entry=76565,
> stat_loc=stat_loc@entry=0x7f28ae82919c, options=options@entry=0) at
> ../sysdeps/unix/sysv/linux/waitpid.c:40
> #1 0x00000000004a2015 in mono_handle_native_sigsegv (signal=signal@entry=11,
> ctx=ctx@entry=0x7f28ae829ac0, info=info@entry=0x7f28ae829bf0) at
> mini-exceptions.c:2226
> #2 0x00000000004f782e in mono_arch_handle_altstack_exception
> (sigctx=sigctx@entry=0x7f28ae829ac0, siginfo=siginfo@entry=0x7f28ae829bf0,
> fault_addr=<optimized out>, stack_ovf=stack_ovf@entry=0) at
> exceptions-amd64.c:858
> #3 0x0000000000422f28 in mono_sigsegv_signal_handler (_dummy=11,
> _info=0x7f28ae829bf0, context=0x7f28ae829ac0) at mini-runtime.c:2526
> #4 <signal handler called>
> #5 0x00000000005bcb91 in _mono_reflection_get_type_from_info
> (info=0x1efb270, image=image@entry=0x0, ignorecase=ignorecase@entry=0) at
> reflection.c:7450
> #6 0x00000000005bc750 in mono_reflection_get_type_internal
> (rootimage=rootimage@entry=0x0, image=<optimized out>,
> info=info@entry=0x7fff8b7388e0, ignorecase=ignorecase@entry=0) at
> reflection.c:7565
> #7 0x00000000005bc9b3 in mono_reflection_get_type_with_rootimage
> (rootimage=rootimage@entry=0x0, image=image@entry=0x0,
> info=info@entry=0x7fff8b7388e0, ignorecase=ignorecase@entry=0,
> type_resolve=type_resolve@entry=0x7fff8b7388d4) at reflection.c:7661
> #8 0x00000000005bcb00 in mono_reflection_get_type (image=image@entry=0x0,
> info=info@entry=0x7fff8b7388e0, ignorecase=ignorecase@entry=0,
> type_resolve=type_resolve@entry=0x7fff8b7388d4) at reflection.c:7613
> #9 0x000000000053456d in type_from_name (ignoreCase=<optimized out>,
> str=0x1ef44f0 "System.Nullable`1[[System.Int32, mscorlibBAD]]") at
> icall.c:1286
> #10 ves_icall_type_from_name (name=0x7f28ae7981b0, throwOnError=<optimized
> out>, ignoreCase=<optimized out>) at icall.c:1322
>
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