Re: [Gm2] gm2 segfault

[Gaius Mulley]

Dmitry Shatrov <address@hidden> writes:

> The following program causes a segmentation fault (I do "gm2 -c
> test.mod")
> 
> 
> MODULE test;
> 
> VAR A : CARDINAL;
> 
> CONST B = A;
> 
> END test.

Hi Dmitry,

can you check that you've done a cvs update in the gcc-4.1.2/gcc/gm2
directory.  Or you could 

cd gcc-4.1.2/gcc
rm -rf gm2
cvs -z3 -d:pserver:address@hidden:/sources/gm2 co gm2
cd ../..

and rebuild.

My version of gm2 now detects this as a compile time error,

regards,
Gaius


> 
> I've tested it with the current gm2 from CVS, gm2 from gcc-4.1.2
> +gm2-20070818.tar.gz tarball, and "-D 20060623" CVS branch with
> gcc-3.3.6. All these combinations fail in the same way.
> 
> Here's a backtrace for current gm2 from CVS:
> 
> (gdb) bt
> #0  internal_error_function (msgid=0xb7b67d51 "%s", ap=0xbfc01e10)
>     at ../../gcc/gm2/gccgm2.c:2130
> #1  0x08169011 in diagnostic_report_diagnostic (context=0x94a97c0, 
>     diagnostic=0xbfc01df0) at ../../gcc/diagnostic.c:192
> #2  0x08169212 in internal_error (gmsgid=0x848066c "%s")
>     at ../../gcc/diagnostic.c:548
> #3  0x08316ff4 in crash_signal (signo=11) at ../../gcc/toplev.c:587
> #4  <signal handler called>
> #5  0x0804e31f in constant_expression_warning (value=0x0)
>     at ../../gcc/gm2/gccgm2.c:3320
> #6  0x0805337c in gccgm2_DeclareKnownConstant (type=0xb7a4c958,
> value=0x0)
>     at ../../gcc/gm2/gccgm2.c:6095
> #7  0x080a079e in CheckConstant (des=270, expr=269)
>     at gm2/gm2-compiler-boot/M2GenGCC.c:1904
> #8  0x080a190d in CodeBecomes (quad=7, op1=270, op2=0, op3=269)
>     at gm2/gm2-compiler-boot/M2GenGCC.c:2438
> #9  0x0809e4dd in CodeStatement (q=7) at
> gm2/gm2-compiler-boot/M2GenGCC.c:741
> #10 0x0809e236 in M2GenGCC_ConvertQuadsToTree (Start=7, End=10)
>     at gm2/gm2-compiler-boot/M2GenGCC.c:655
> #11 0x080bae65 in M2Scope_ForeachScopeBlockDo (sb_=0x95c5168, 
>     p=0x809e225 <M2GenGCC_ConvertQuadsToTree>)
>     at gm2/gm2-compiler-boot/M2Scope.c:316
> #12 0x0809e1b2 in M2Code_CodeBlock (scope=85)
> ---Type <return> to continue, or q <return> to quit---
>     at gm2/gm2-compiler-boot/M2Code.c:578
> #13 0x0809d9c7 in M2Code_Code () at gm2/gm2-compiler-boot/M2Code.c:298
> #14 0x0807e6eb in M2Comp_Compile (s_=0x95b6a50)
>     at gm2/gm2-compiler-boot/M2Comp.c:225
> #15 0x08069fe9 in StartParsing () at gm2/gm2-compiler-boot/gm2.c:132
> #16 0x0806a012 in _M2_gm2_init (argc=15, argv=0xbfc02424)
>     at gm2/gm2-compiler-boot/gm2.c:140
> #17 0x08067fc8 in gccgm2front (argc=15, argv=0xbfc02424)
>     at gm2/gm2-compiler-boot/mod_init.c:127
> #18 0x0804c437 in gm2_parse_file (debug_flag=0)
> at ../../gcc/gm2/gccgm2.c:2198
> #19 0x0831846d in toplev_main (argc=15, argv=0xbfc02424)
>     at ../../gcc/toplev.c:991
> #20 0x080f51b2 in main (argc=Cannot access memory at address 0x0
> ) at ../../gcc/main.c:35
> 
> 
> 
> 
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