Date: Sat, 28 Jul 2001 06:27:54 -0400
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In-reply-to: <006501c11742$a3fad650$0a02a8c0@acceleron> (acottrel@ihug.com.au)
Subject: Re: Make 3.791 on Windows 2000 test
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> From: "Andrew Cottrell" <acottrel AT ihug DOT com DOT au>
> Date: Sat, 28 Jul 2001 18:52:31 +1000
> 
> I modified make's main.c and added the following line, but the crash still
> occured and I couldn't see any extra debug info or extra info in the crash
> outout attached below. I also just added a printf after I set the
> malloc_debug level so I can see how many time make is called re-cursively.
> This was added at line number 774 in make's main.c befiore the main function
> along with a #inlcude <crt0.h>.
> 
> int _crt0_startup_flags =  _CRT0_FLAG_UNIX_SBRK;
> 
> This is the output with the crto startup flag set as above and the maloc
> debug level set to 4. Yet a different crash position.  Have I set the crt0
> startup flag correctly?

Yes, I think so.  Charles?

> Exiting due to signal SIGSEGV
> General Protection Fault at eip=00178fc8
> eax=ffa90000 ebx=ffa90000 ecx=000001d5 edx=ffaa0000 esi=ffa90ff8 edi=00000fe8
> ebp=003dc8cc esp=003dc8a4 program=d:\dj204\lib\gcc-lib\djgpp\2.953\cc1.exe
> cs: sel=095f  base=01d50000  limit=7e29ffff
> ds: sel=0967  base=01d50000  limit=7e29ffff
> es: sel=0967  base=01d50000  limit=7e29ffff
> fs: sel=0937  base=0000f100  limit=0000ffff
> gs: sel=0977  base=00000000  limit=0010ffff
> ss: sel=0967  base=01d50000  limit=7e29ffff
> App stack: [003e0000..00260000]  Exceptn stack: [001a8234..001a62f4]
> 
> Call frame traceback EIPs:
>   0x00178fc8 __doserrno+1259888
>   0x00007f5b _func_if+303, line 1119 of function.c

Note that now it's cc1 which crashes, not Make.  So maybe Charles is
right, and Unixy sbrk is the solution.  Hmm...  Maybe try building GCC
with Unixy sbrk and se if that helps (you will have to do that for
both gcc.exe and cc1.exe).

Still, I'd like to try to find the problem in `sbrk' with the default
algorithm.  It's possible we don't handle address wrap-around
correctly.