Also, crashes with malloc() may be because of earlier bugs. If you free() an incorrect pointer, it may corrupt the heap -- causing the program to crash later instead of immediately, if you're unlucky. That can be hard to track down.
Actually, I lied - the above will probably work just fine. Why? Because malloc is required to return a pointer to memory "suitably aligned for any purpose". That means malloc implementations return bytes of memory in chunks of whatever size meets the alignment restrictions on whatever platform you're running - most likely 8 bytes.
So malloc( 1 ) will effectively return a pointer to what's most likely an empty 8-byte space in your heap.
That's just another reason why overrunning a malloc'd buffer sometimes causes problems and sometimes doesn't.
There is no issue with this piece of code (outside the useless strRoutine declaration). The problem is elsewhere. Are you sure you get a bus error and not a segmentation fault ?
Program terminated with signal 11, Segmentation fault.
This was the error i got and from the gdb i got the below error
Code:
#0 0xffffffff75b84d38 in t_splay () from /lib/64/libc.so.1
#1 0xffffffff75b84b9c in t_delete () from /lib/64/libc.so.1
#2 0xffffffff75b84778 in realfree () from /lib/64/libc.so.1
#3 0xffffffff75b850cc in cleanfree () from /lib/64/libc.so.1
#4 0xffffffff75b840d8 in _malloc_unlocked () from /lib/64/libc.so.1
#5 0xffffffff75b83fc8 in malloc () from /lib/64/libc.so.1
#6 0x0000000100016988 in mallocX (vintNumberOfBytes=3312) at Malloc.c:98
#7 0x000000010000f650 in IncreaseAListSize (robjAlist=0x100169440, vlngNewSize=1) at AList.c:1252
#8 0x000000010000fbec in AddToTailAL (robjAlist=0x100169440, vobjElementPtr=0x10031a960) at AList.c:1458
#9 0x0000000100006a9c in _ULOGTemplateList (vobjULOGAnalyzeDb=0x0) at ULOGAlerts.c:228
#10 0x00000001000073b0 in main (argc=6, argv=0xffffffff7fffe938) at ULOGAlerts.c:422
Last edited by Scott; 12-04-2012 at 06:38 AM..
Reason: Code tags
Hi all
What is the qualification required by Linux/Solaris System Administrator to become a Linux/Solaris System Programmer as to gain complete knowledge on computers.
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