[Mono-dev] Mono runtime on ARM920t with many assertions
Rafael Teixeira
monoman at gmail.com
Fri Jun 1 11:48:07 UTC 2012
Apparently some natives hashtables are receiving null hashs in the runtime.
Probably you need to follow the calls to find why the callers are passing
those nulls, it may be that some native library (dependency) in your
environment isn't returning what is expected to the callers.
Good hunt,
Rafael "Monoman" Teixeira
---------------------------------------
"The most exciting phrase to hear in science, the one that heralds new
discoveries, is not 'Eureka!' (I found it!) but 'That's funny ...'"
Isaac Asimov
US science fiction novelist & scholar (1920 - 1992)
On Fri, Jun 1, 2012 at 7:29 AM, Dennis Krzyzaniak <dkml at conworx.com> wrote:
> Hi all,****
>
> ** **
>
> I am trying to get Mono running on a spider III device including an
> ARM920t processor with Linux as OS.****
>
> ** **
>
> /host $ uname -a****
>
> Linux Spider-III 2.6.17.3-axo-s07.2 #1425 Fri Jul 25 10:59:30 CEST 2008
> armv4tl unknown****
>
> ** **
>
> When I try to invoke a simple hello_world.exe I get 399 assertions in
> eglib (always the same asserts):****
>
> ** **
>
> /host $ ./mono hello_world.exe****
>
> ../../../../eglib/src/ghashtable.c:293: assertion 'hash != NULL' failed***
> *
>
> ../../../../eglib/src/ghashtable.c:236: assertion 'hash != NULL' failed***
> *
>
> ../../../../eglib/src/ghashtable.c:293: assertion 'hash != NULL' failed***
> *
>
> ../../../../eglib/src/ghashtable.c:236: assertion 'hash != NULL' failed***
> *
>
> …****
>
> ** **
>
> The ‘Hello World’ is also displayed:****
>
> ../../../../eglib/src/ghashtable.c:293: assertion 'hash != NULL' failed***
> *
>
> ../../../../eglib/src/ghashtable.c:236: assertion 'hash != NULL' failed***
> *
>
> Hello World../../../../eglib/src/ghashtable.c:293: assertion 'hash !=
> NULL' failed****
>
> …****
>
> ** **
>
> The hello world code:****
>
> using System;****
>
> namespace foobar {****
>
> public class foo {****
>
> public static void Main(string[] args) {****
>
> Console.WriteLine("Hello World");****
>
> }****
>
> }****
>
> }****
>
> ** **
>
> I am absolutely new to Mono and completely lost with this behavior. Maybe
> someone knows the reason or can point me to a direction to find the issue?
> ****
>
> I attached a trace (./mono –trace hello_world.exe), maybe this helps? The
> trace is cut to fit into this mail, please let me know if a full trace is
> needed.****
>
> ** **
>
> I am using the debian source package of Mono 2_10_8.1-1 because in the
> official release a unittest fails.****
>
> To get Mono build with the ‘old’ ARM toolchain provided by the vendor I
> made a few changes in the project please see below. ****
>
> I am calling configure with the following parameters:****
>
> configure --build=i686-pc-linux-gnu --host=arm-axotec-linux-gnu
> LD=arm-axotec-linux-gnu-ld OBJDUMP=arm-axotec-linux-gnu-objdump
> --prefix=/host --disable-mcs-build --srcdir=../..****
>
> ** **
>
> configure.in:****
>
> +****
>
> +dnl****
>
> +dnl BEGIN Conworx Spider III ARMv4t settings****
>
> +dnl there are already arm-*-linux* settings below but the place is to
> late, checks which****
>
> +dnl tested before fails. So I added my specific stuff here without
> changing the old****
>
> +dnl settings.****
>
> +dnl****
>
> +if test "x$host" = "xarm-axotec-linux-gnu"; then****
>
> +dnl looks like this are all needed settings, the rest is redundant.****
>
> + TARGET=ARM;****
>
> + cross_compiling=yes****
>
> + dnl which defines are needed? just copied some****
>
> + dnl CPPFLAGS="$CPPFLAGS -DGC_LINUX_THREADS -D_GNU_SOURCE -D_REENTRANT
> -DARM_FPU_NONE -D__ARM_EABI__"****
>
> + CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE -D_REENTRANT -DARM_FPU_NONE
> -mcpu=arm920t -D__ARM_ARCH_4__"****
>
> + CPPFLAGS="$CPPFLAGS -DNO_THUMB2_INSTRUCTIONS"****
>
> + arch_target=arm;****
>
> + ACCESS_UNALIGNED="no"****
>
> + JIT_SUPPORTED=yes****
>
> + jit_wanted=true****
>
> + sgen_supported=true****
>
> + dnl Can't use tls, since it depends on the runtime detection of tls
> offsets****
>
> + dnl in mono-compiler.h****
>
> + libgc_threads=pthreads****
>
> + with_tls=pthread****
>
> + use_sigposix=yes****
>
> + dnl Enable support for using sigaltstack for SIGSEGV and****
>
> + dnl stack overflow handling (TODO not sure if it works on my arm)****
>
> + with_sigaltstack=no****
>
> + dnl to bypass the underscore linker check, can't work when
> cross-compiling****
>
> + mono_cv_uscore=yes****
>
> + dnl support ahead of time compilation****
>
> + AOT_SUPPORTED="yes"****
>
> + libdl="-ldl"****
>
> + dnl I need some define to enable my hacks oO****
>
> + AC_DEFINE(PLATFORM_AXOTEC_LINUX,1,[Targeting axotec linux on arm920t])*
> ***
>
> +fi****
>
> +****
>
> ** **
>
> +# Added LT_OUTPUT to generate libtool script by config.lt before calling
> it.****
>
> +LT_OUTPUT****
>
> export_ldflags=`(./libtool --config; echo eval echo
> \\$export_dynamic_flag_spec) | sh`****
>
> AC_SUBST(export_ldflags)****
>
> ** **
>
> +dnl the check for cross compiling is included in the mono release but
> removed****
>
> +dnl in the debian source package because for the debian distribution no
> cross****
>
> +dnl compiling is used.****
>
> +if test ${TARGET} = ARM && test x$cross_compiling = xno; then****
>
> dnl **********************************************
>
> dnl *** Check to see what FPU is available *******
>
> dnl **********************************************
>
> ** **
>
> ** **
>
> ** **
>
> mono/metadata/sgen-archdep.h:****
>
> ** **
>
> /* We dont store ip, sp */****
>
> #define ARCH_NUM_REGS 14****
>
> +/* arm920t does not support thumb2 instructions */****
>
> +#if !defined (NO_THUMB2_INSTRUCTIONS)****
>
> +/* THUMB2 instuctions */****
>
> #define ARCH_STORE_REGS(ptr) \****
>
> __asm__ __volatile__( \****
>
> "push {lr}\n" \****
>
> @@ -145,6 +148,17 @@****
>
> : \****
>
> : "r" (ptr) \****
>
> )****
>
> +#else /* NO_THUMB2_INSTRUCTIONS */****
>
> +/* ARM instuctions */****
>
> +#define ARCH_STORE_REGS(ptr) \****
>
> + __asm__ __volatile__( \****
>
> + "stmfd sp!, {lr}\n" \****
>
> + "mov lr, %0\n" \****
>
> + "stmia lr!, {r0-r12}\n" \****
>
> + "ldmfd sp!, {lr}\n" \****
>
> + : \****
>
> + : "r" (ptr))****
>
> +#endif /* NO_THUMB2_INSTRUCTIONS */****
>
> ** **
>
> ** **
>
> ** **
>
> mono/mini/jit-icalls.c:****
>
> ** **
>
> #if defined(__arm__) && MONO_ARCH_SOFT_FLOAT****
>
> +#if defined (PLATFORM_AXOTEC_LINUX)****
>
> + /* ULLONG_MAX is not defined, just define here the max size of an
> unsigend****
>
> + * long long int. */****
>
> +#ifndef ULLONG_MAX****
>
> +#define ULLONG_MAX 18446744073709551615ULL****
>
> +#endif /* !ULLONG_MAX */****
>
> +#endif /* PLATFORM_AXOTEC_LINUX */****
>
> if (isnan (v) || !(v >= -0.5 && v <= ULLONG_MAX+0.5)) {****
>
> mono_raise_exception (mono_get_exception_overflow ());****
>
> ** **
>
> ** **
>
> Would be great to get some help!****
>
> ** **
>
> ** **
>
> Best regards,****
>
> Dennis Krzyzaniak****
>
> ** **
>
> _______________________________________________
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>
>
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