[Gcl-devel] EXTRA_BUFSIZE

[Mike Thomas]

Hi Camm.

I finally fixed my home computer by putting in an AMD Athlon 64 3000+ 
and all extra bits needed to go from a PIII to that CPU.  Needless to 
say, GCL doesn't build under Windows.

The heart of the problem is that signalsPendingPtr is overwritten, going 
from 0xc00000 to 0xc30000 at line 139 in main.c where setbuf is called:

--------------------------------------------------------------
(gdb) r
Starting program: c:\cvs\head\gcl/unixport/saved_pre_gcl.exe

Breakpoint 2, init_shared_memory () at mingwin.c:864
864         if ( ! shared_memory_initialised ) {
(gdb) c
Continuing.

Breakpoint 1, init_signals_pendingPtr () at mingwin.c:834
834      if (sharedMemory.address) {
(gdb) c
Continuing.

Breakpoint 4, main (argc=1, argv=0x3f2d00, envp=0x3f3048) at main.c:133
133         RECREATE_HEAP
(gdb) p signalsPendingPtr
$13 = (unsigned int *) 0xc00000
(gdb) n
139         setbuf(stdin, stdin_buf);
(gdb) p signalsPendingPtr
$14 = (unsigned int *) 0xc30000
(gdb)
--------------------------------------------------------------

While looking into this I wondered why the stdin/out buffers are set to 
a size of BUFSIZ + EXTRA_BUFSIZE rather than BUFSIZ.  Any ideas?

Cheers

Mike Thomas