MacOS X small stack?

ok, perhaps i'm just being an idiot, but can someone tell me why this
doesn't work?

int main ( int argc, char **argv )
{
int foo[160000];
return 1;
}

It crashes when i try to run it (the crash log is at the bottom of the
message). I'm running on 10.2.6, this executable was created using
gcc but the same problem exists when i use project builder.

It looks like i'm running out of stack space, but all things
considered, this isn't *that* much memory that i'm try to allocate on
the stack...is it?


Here's some info from gcc and uname:

fiorina161% gcc -v
Reading specs from /usr/libexec/gcc/darwin/ppc/3.1/specs
Thread model: posix
Apple Computer, Inc. GCC version 1175, based on gcc version 3.1
20020420 (prerelease)

fiorina161% uname -a
Darwin fiorina161.nowhere.com 6.6 Darwin Kernel Version 6.6: Thu May
1 21:48:54 PDT 2003; root:xnu/xnu-344.34.obj~1/RELEASE_PPC Power
Macintosh powerpc


Here's the crash log:

Date/Time: 2003-07-23 18:43:45 -0700
OS Version: 10.2.6 (Build 6L60)
Host: fiorina161.nowhere.com

Command: a.out
PID: 2053

Exception: EXC_BAD_ACCESS (0x0001)
Codes: KERN_INVALID_ADDRESS (0x0001) at 0xbff63490

Thread 0 Crashed:
#0 0x00001d5c in main
#1 0x00001af4 in _start (crt.c:267)
#2 0x00001974 in start

PPC Thread State:
srr0: 0x00001d5c srr1: 0x0000d030 vrsave: 0x00000000
xer: 0x00000000 lr: 0x00001af4 ctr: 0x9000a5a0 mq: 0x00000000
r0: 0xfff63bb0 r1: 0xbffff8e0 r2: 0x00000000 r3: 0x00000001
r4: 0xbffff994 r5: 0xbffff99c r6: 0xbffffa48 r7: 0x8fe48550
r8: 0xbffffa59 r9: 0x0000198c r10: 0x00000007 r11: 0xbffffa58
r12: 0x9000a5a0 r13: 0x00000000 r14: 0x00000000 r15: 0x00000000
r16: 0x00000000 r17: 0x00000000 r18: 0x00000000 r19: 0x00000000
r20: 0x00000000 r21: 0x00000000 r22: 0x00000000 r23: 0x00000000
r24: 0x00000000 r25: 0x00000000 r26: 0xbffff990 r27: 0x00000008
r28: 0x00000001 r29: 0xbffff99c r30: 0xbffff994 r31: 0x0000198c


Thank you.
--tka

In article <7c0c6162.0307232226.1e4d1296 DeleteThis @posting.google.com>,
tka2 DeleteThis @mail.com (Todd Aceman) wrote:

 > ok, perhaps i'm just being an idiot, but can someone tell me why this
 > doesn't work?
 >
 > int main ( int argc, char **argv )
 > {
 > int foo[160000];
 > return 1;
 > }
 >
 > It crashes when i try to run it (the crash log is at the bottom of the
 > message). I'm running on 10.2.6, this executable was created using
 > gcc but the same problem exists when i use project builder.
 >
 > It looks like i'm running out of stack space, but all things
 > considered, this isn't *that* much memory that i'm try to allocate on
 > the stack...is it?

The default stack size is 512KB, but you're trying to use more than that.

You can compile with a larger stack size by passing the -stack_size flag
to the linker. See ld's man page for details. To pass a linker flag
through from the compiler, use the -Wl flag to gcc. In other words,
compile like this:
gcc -Wl,-stack_size -Wl,<some multiple of 4K> -o foo foo.c

Hope this helps,
Eric

--
Eric Albert ejalbert DeleteThis @stanford.edu
<a style='text-decoration: underline;' href="http://rescomp.stanford.edu/~ejalbert/" target="_blank">http://rescomp.stanford.edu/~ejalbert/</a><!-- ~MESSAGE_AFTER~ -->