CygProfiler is a set of functions for use with gcc's -finstrument-functions option. See info page of gcc for details and description of this option.
To use it, compile your program with -finstrument-functions and link together with cyg-profile.c. Somewhere at the beginning of the program call cygprofile_enable() to start logging all function entries and exits into a logfile.
By default the name of the logfile is cyglog.$PID, but you can set a different one using cygprofile_setfilename(). To get current logfile name use cygprofile_getfilename(). To see if logging is enabled use cygprofile_isenabled(). You can stop logging by calling cygprofile_disable().
Note that subsequent enabling of logging will overwrite the previous log with the same name!
After you have created a logfile run cyg-resolve.pl with the program name that created the logfile as a first argument and the logfile name as a second argument. On stdout you'll see a log of all instrumentalized functions invoked while logging was enabled.
$ gcc -finstrument-functions -o test test.c cyg-profile.c
$ ./test
Logfile: cyglog.1234
$ ./cyg-resolve.pl test cyglog.1234
Loading symbols from test ... OK
Seen 65 symbols, stored 22 function offsets
Level correction set to 0
+ 0 0x80486a9 (from 0x804872f) function3()
+ 1 0x804866d (from 0x80486c8) function2()
+ 2 0x8048634 (from 0x804868c) function1()
done
As you can see - function3() called function2() which then called function1(). Function main() isn't in the list, because the profiling was not yet enabled at the time it was called.
gcc -c cyg-profile.c
$ g++ -finstrument-functions -c test.cxx
$ g++ -o test test.o cyg-profile.o
$ ./test
Logfile: cyglog.1234
$ ./cyg-resolve.pl test cyglog.1234
Loading symbols from test ... OK
Seen 78 symbols, stored 25 function offsets
Level correction set to 1
+ 1 0x400d1c (from 0x400dcb) _ZN4test9function3Ec()
+ 2 0x400cd4 (from 0x400d48) _ZN4test9function2Ei()
+ 3 0x400c98 (from 0x400d01) _ZN4test9function1El()
+ 0 0x400e3e (from 0x2a95ae2c8b) __tcf_0()
done
The usage is similar to the plain C case. Unfortunately you'll only see the mangled function names, e.g. _ZN4test9function3Ec instead of int test::function3(char c).