Fixed some misspellings of 2 as sizeof(UNIT) so that they won't break

things when sizeof(UNIT) becomes a runtime parameter.  The relevant 2
is the one in profil(2)'s scaling of pc's to bucket numbers:

	   bucket = (pc - offset) / 2 * profil_scale / 65536

gprof(1) must duplicate this scaling, bug for bug compatibly, so it
must first do an integer division by 2 although this mainly makes
scales larger than 65536 useless.  sizeof(UNIT) was already wrong in
gprof4, but there were no problems because the fake profil scale is a
multiple of 2.

There are also some rounding bugs in the scaling, but these are only
problems if profil(2) is used directly to create unusual (and not
useful) scales.

1 files changed, 7 insertions, 1 deletions

diff --git a/usr.bin/gprof/gprof.h b/usr.bin/gprof/gprof.h
index 4d2b949..c37c00e 100644
--- a/usr.bin/gprof/gprof.h
+++ b/usr.bin/gprof/gprof.h
@@ -78,6 +78,13 @@ typedef int	bool;
 #define	TRUE	1
 
     /*
+     *	Historical scale factor in profil(2)'s algorithm for converting
+     *	pc addresses to bucket numbers.  This now just complicates the
+     *	scaling and makes bucket:pc densities of more than 1/2 useless.
+     */
+#define	HISTORICAL_SCALE_2	2
+
+    /*
      *	ticks per second
      */
 long	hz;
@@ -87,7 +94,6 @@ typedef	int64_t UNIT;
 #else
 typedef	u_short UNIT;		/* unit of profiling */
 #endif
-#define	UNITS_TO_CODE	(OFFSET_OF_CODE / sizeof(UNIT))
 
 char	*a_outname;
 #define	A_OUTNAME		"a.out"