| Description | Profiling timer expired |
|---|---|
| Default action | Abnormal termination of the process |
| SA_SIGINFO macros | |
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On POSIX-compliant platforms, SIGPROF is the signal sent to a process when the profiling timer expires. The symbolic constant for SIGPROF is defined in the header file signal.h. Symbolic signal names are used because signal numbers can vary across platforms.
SIG is a common prefix for signal names. PROF is an abbreviation for profiler.
SIGPROF is sent when a timer expires, like SIGVTALRM and the more popular SIGALRM. The distinction of SIGPROF is that its timer counts time spent executing the process and by the system carrying out tasks on behalf of the process; SIGVTALRM measures only time spent by the process itself, while SIGALRM measures real time. It is suggested that SIGPROF be used with SIGVTALRM to profile the time spent by the process in user and kernel space.
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