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Signal: Segmentation Violation (Fault)
This is raised when the program attempts has a bad memory reference such as:
- Address not mapped to object (accessing memory that isn't mapped)
- Invalid Permission for mapped object (accessing memory that permissions deny).
This is almost invariably a programming fault.
The default action for this signal is to cause the program to terminate and dump core.
- A classic example is to deference a pointer in C that is either uninitialised, or has already been freed. Here is some C code
- include <stdio.h>
int main(void) {
int *pointer;
pointer=0;
printf("value pointed to by pointer is %d\n",
pointer / this will cause SEGV */
);