Re: [Gcl-devel] Segmentaton fault

[Camm Maguire]

Greetings!  What is happening here is that the C stack is overflowing,
raising a sigsegv, triggering the segmentation_catcher handler which
has rudimentary code reporting C stack overflow conditions, but being
unable to call it as there is no more C stack space.  I just tried
mprotecting the last page of C stack PROT_READ or some such --
mprotect won't work on the stack.  If you know of a way to raise the
sigsegv in advance of being absolutely out of C stack space, which
would allow the error handler to run, I'd be happy to consider
implementing it.

Take care,

Eric Merritt <address@hidden> writes:

> Camm,
> 
>  Here is the backtrace you requested.
> 
> -----------------------------------------------------
> #0  0x40189f0f in tcgetattr () from /lib/libc.so.6
> #1  0x40185b96 in isatty () from /lib/libc.so.6
> #2  0x080642ed in rl_putc_em (c=32, f=0x401dfda0) at
> gcl_readline.d:230
> #3  0x08052b5a in writec_stream (c=32, strm=0x8531558)
> at file.d:933
> #4  0x0807df1e in writec_PRINTstream (c=32) at
> print.d:223
> #5  0x0807f553 in write_object (x=0x844dd20, level=0)
> at print.d:719
> #6  0x0808310b in princ (obj=0x844dd20,
> strm=0x8531510) at print.d:1891
> #7  0x080832e3 in print (obj=0x8a5ec84,
> strm=0x8514020) at print.d:1948
> #8  0x0804ac57 in L1 () at test.c:14
> #9  0x0804acbc in L2 () at test.c:301
> #10 0x0804ac6b in L1 () at test.c:16
> #11 0x0804acbc in L2 () at test.c:30
> #12 0x0804ac6b in L1 () at test.c:16
> #13 0x0804acbc in L2 () at test.c:30
> #14 0x0804ac6b in L1 () at test.c:16
> #15 0x0804acbc in L2 () at test.c:30
> #16 0x0804ac6b in L1 () at test.c:16
> #17 0x0804acbc in L2 () at test.c:30
> -------------------------------------------------
> 
> This goes on for atleast another 65000+ lines with no change
> 
> 
>       
>               
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> 

-- 
Camm Maguire                                            address@hidden
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"The earth is but one country, and mankind its citizens."  --  Baha'u'llah