[M3devel] Ubuntu problems

[Mika Nystrom]

Sorry, I have now read the mailing list archives a bit better.

I am going to try bootstrapping the latest CVS with Tony's cm3 binary,
to use pthreads...

   Mika


Mika Nystrom writes:
>Hello Modula-3 people,
>
>I am trying to build things with CM3 on a relatively recent Ubuntu
>system (don't ask me why...) and I am running into a segfault that
>I haven't seen mentioned before.  I have a feeling it has something
>to do with stack formats, but I'm not sure what to do next.
>
>I downloaded the cm3-5.4.0 binaries and started with that.  The 
>compiler in the binary distribution runs, but it appears to produce
>garbage.  I first tried bootstrapping but it crashes the moment it
>tries to execute something it has compiled itself.  So then I tried
>hello, world, with the same results...
>
>Here's the system identification:
>
>mika at edwards:~/test/src$ uname -a
>Linux edwards 2.6.20-16-386 #2 Sun Sep 23 19:47:10 UTC 2007 i686 GNU/Linux
>
>I made a "hello, world" program as follows:
>
>MODULE Main;
>IMPORT IO;
>
>BEGIN IO.Put("Hello, world!\n") END Main.
>
>Compiled with cm3 directly from the distributed cm3-5.4.0 for 
>LINUXLIBC6 and I get a crash in CsetjmpASM.s (as far as I can tell).
>The last unclobbered stack I seem to be able to get in m3gdb is
>this:
>
>Breakpoint 5, 0xb75e5fb4 in _setjmp () at ../src/C/LINUXLIBC6/CsetjmpASM.s:31
>31      in ../src/C/LINUXLIBC6/CsetjmpASM.s
>(m3gdb) where
>#0  0xb75e5fb4 in _setjmp () at ../src/C/LINUXLIBC6/CsetjmpASM.s:31
>#1  0xb75dbd51 in RTThread__Transfer (from=0xbfe28530, to=0xbfe28530) at ../sr
>c/runtime/LINUXLIBC6/RTThreadC.c:14
>#2  0xb75dbaed in FlushStackCache () at RTThread.m3:65
>#3  0xb75e27c9 in DetermineContext (oldSP=Invalid C/C++ type code 35 in symbol
> table.
>) at ThreadPosix.m3:1101
>#4  0xb75e270d in InitTopContext (c=Invalid C/C++ type code 30 in symbol table
>.
>) at ThreadPosix.m3:1076
>#5  0xb75e4325 in Init () at ThreadPosix.m3:1498
>#6  0xb75c9592 in InitRuntime (p_argc=Invalid C/C++ type code 39 in symbol tab
>le.
>) at RTLinker.m3:59
>#7  0x08048861 in main (argc=1, argv=0xbfe28824, envp=0xbfe2882c) at _m3main.m
>c:3
>(m3gdb) cont
>Continuing.
>
>Program received signal SIGSEGV, Segmentation fault.
>0xa8dbaede in ?? ()
>
>s.sp was lately 16_b75af6b9, if that means anything at all.
>
>Oh yes, one more thing: setting LD_POINTER_GUARD to 0 before running
>the program has no effect on the crash.
>
>Any suggestions for how one might make progress on this?
>
>     Mika