10-21-2008
I don't think you've solve the underlying problem. I see no reason to re-declare pcName as you have.
When you overwrite a data structure (heap, stack, etc.), there will be trouble. Increasing the buffer size, moving it into another data storage area, or other finagling simply delays or relocates the trouble. Be sure to understand your data size limitations, and ensure your program never exceeds their bounds. Any other solution is broken by definition.
It sounds like you are unsure of the exact number of bytes used by your data structures. Now might be a good time to sit down with pencil and paper and start drawing some size diagrams, complete with starting and ending virtual addresses for those data structures. This will help you see what you may be overwriting.
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STACK(9) BSD Kernel Developer's Manual STACK(9)
NAME
STACK -- stack macros
SYNOPSIS
#include <sys/param.h>
type
STACK_ALLOC(sp, size);
type
STACK_MAX(sp, size);
type
STACK_ALIGN(sp, bytes);
type
STACK_GROW(sp, size);
type
STACK_SHRINK(sp, size);
DESCRIPTION
A stack is an area of memory with a fixed origin but with a variable size. A stack pointer points to the most recently referenced location
on the stack. Initially, when the stack has a size of zero, the stack pointer points to the origin of the stack. When data items are added
to the stack, the stack pointer moves away from the origin.
The STACK_ALLOC() macro returns a pointer to allocated stack space of some size. Given the returned pointer sp and size, STACK_MAX() returns
the maximum stack address of the allocated stack space. The STACK_ALIGN() macro can be used to align the stack pointer sp by the specified
amount of bytes.
Two basic operations are common to all stacks: a data item is added (``push'') to the location pointed by sp or a data item is removed
(``pop'') from the stack. The stack pointer must be subsequently adjusted by the size of the data item. The STACK_GROW() and STACK_SHRINK()
macros adjust the stack pointer sp by given size.
A stack may grow either up or down. The described macros take this into account by using the __MACHINE_STACK_GROWS_UP preprocessor define.
SEE ALSO
param(3), queue(3)
BSD
April 8, 2011 BSD