This code runs fine in Windows, but seg faults in FreeBSD.
The red is what causes the seg fault. Anyone have any idea what the problem is?Code:#include <stdio.h> #include <stdlib.h> #include <unistd.h> struct s1 { unsigned int num; }; typedef struct my_s { struct s1 *foo; unsigned char[100]; }my_t; int main() { my_t *bar; bar = (my_t *)malloc(sizeof(my_t)); bar->foo->num = 10; printf("%d",bar->foo->num); reeturn 0; }
bar->foo does not have any memory assigned. You need to malloc all your pointers, not just one.Originally Posted by homer_3
C programming resources:
GNU C Function and Macro Index -- glibc reference manual
The C Book -- nice online learner guide
Current ISO draft standard
CCAN -- new CPAN like open source library repository
3 (different) GNU debugger tutorials: #1 -- #2 -- #3
cpwiki -- our wiki on sourceforge
Ah. That got it, thanks. Funny how it's not needed in Windows.
It is needed on Windows too. It just so happened that it did not crash your program, but maybe it would at some other time.
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