Sorry if I'm rehashing old stuff.
In trying to build xemacs, I crashed in
the temacs step. The following sample program
also crashes in the same way.
I'd go further but for my nubie questions...
how do I get syscall_printf to work?
how I do I make cygwin with -O0 instead of -O2 besides hacking the makefile.
(I noticed emacs debug also builds with -O2)
whenever I compile with -O0, every cygwin app crashes.
gcc --version = 2.95.2-6 if that matters.
~/mmaptest>uname -a
CYGWIN_NT-4.0 FOOBAR 1.3.0(0.36/3/2) 2001-03-13 00:38 i686 unknown
P.S. I did get emacs to build by undefineing HAS_MMAP in emacs's config.h
#include <memory.h>
main()
{
char *a;
char *b;
char *c;
char *d;
a=(char *)mmap(0,4096,3,34,-1,0); //24930000
b=(char *)mmap(0,4096,3,34,-1,0) ; //24931000
c=(char *)mmap(0,36864,3,34,-1,0) ; //24932000
munmap(b,4096) ;
d=(char *)mmap(0,73728,3,34,-1,0); //2493b000 // footnote 1
memcpy(d,c,34768);
}
footnote 1
This call apparently succeeds even though
mmap_record::map_map (DWORD off, DWORD len)
knows something is wrong when
if (os_being_run == winNT
&& !VirtualProtect (base_address_ + off * getpagesize (),
len * getpagesize (), prot, &old_prot))
syscall_printf ("-1 = map_map (): %E");
calls syscall_printf
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