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Program error signals
Difficulty Level : Medium
Last Updated : 21 Aug, 2021
Signals in computers are a way of communication between the process and the OS. When a running program undergoes some serious error then the OS sends a signal to the process and the process further may not execute. Some processes may have a signal handler that does some important tasks before the process leaves the CPU.
Signal and interrupt are basically the same but a small distinction exists i.e interrupts are generated by the processor and handled by the kernel but signals are generated by the kernel and handled by the process. Error signals generally cause termination of the program and a core dump file is created named core, which stores the state of the process at the moment of termination. This file can be investigated using the debugger to know the cause of program termination.
Error signals:
SIGFPE –
This error signal denotes some arithmetic error that occurred like division by zero, floating-point error. If a program stores integer data in a location that is then used as a floating-point operation, this causes an “invalid operation” exception as the processor cannot recognize the data as a floating-point value. But this signal does not specify the type of floating-point error
