11-15-2007
So, what have you tried so far ?
Where should we help exactly ?
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MONITOR(3) Library Functions Manual MONITOR(3)
NAME
monitor - prepare execution profile
SYNOPSIS
monitor(lowpc, highpc, buffer, bufsize, nfunc)
int (*lowpc)( ), (*highpc)( );
short buffer[ ];
DESCRIPTION
An executable program created by `cc -p' automatically includes calls for monitor with default parameters; monitor needn't be called
explicitly except to gain fine control over profiling.
Monitor is an interface to profil(2). Lowpc and highpc are the addresses of two functions; buffer is the address of a (user supplied)
array of bufsize short integers. Monitor arranges to record a histogram of periodically sampled values of the program counter, and of
counts of calls of certain functions, in the buffer. The lowest address sampled is that of lowpc and the highest is just below highpc. At
most nfunc call counts can be kept; only calls of functions compiled with the profiling option -p of cc(1) are recorded. For the results
to be significant, especially where there are small, heavily used routines, it is suggested that the buffer be no more than a few times
smaller than the range of locations sampled.
To profile the entire program, it is sufficient to use
extern etext();
...
monitor((int)2, etext, buf, bufsize, nfunc);
Etext lies just above all the program text, see end(3).
To stop execution monitoring and write the results on the file mon.out, use
monitor(0);
then prof(1) can be used to examine the results.
FILES
mon.out
SEE ALSO
prof(1), profil(2), cc(1)
MONITOR(3)