--- /dev/null
+/*-
+ * Copyright (c) 1982, 1986, 1992, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * @(#)gmon.h 8.2 (Berkeley) 1/4/94
+ */
+
+#ifndef _SYS_GMON_H
+#define _SYS_GMON_H 1
+
+#include <features.h>
+
+#include <sys/types.h>
+
+/*
+ * See gmon_out.h for gmon.out format.
+ */
+
+/* structure emitted by "gcc -a". This must match struct bb in
+ gcc/libgcc2.c. It is OK for gcc to declare a longer structure as
+ long as the members below are present. */
+struct __bb
+{
+ long zero_word;
+ const char *filename;
+ long *counts;
+ long ncounts;
+ struct __bb *next;
+ const unsigned long *addresses;
+};
+
+extern struct __bb *__bb_head;
+
+/*
+ * histogram counters are unsigned shorts (according to the kernel).
+ */
+#define HISTCOUNTER unsigned short
+
+/*
+ * fraction of text space to allocate for histogram counters here, 1/2
+ */
+#define HISTFRACTION 2
+
+/*
+ * Fraction of text space to allocate for from hash buckets.
+ * The value of HASHFRACTION is based on the minimum number of bytes
+ * of separation between two subroutine call points in the object code.
+ * Given MIN_SUBR_SEPARATION bytes of separation the value of
+ * HASHFRACTION is calculated as:
+ *
+ * HASHFRACTION = MIN_SUBR_SEPARATION / (2 * sizeof(short) - 1);
+ *
+ * For example, on the VAX, the shortest two call sequence is:
+ *
+ * calls $0,(r0)
+ * calls $0,(r0)
+ *
+ * which is separated by only three bytes, thus HASHFRACTION is
+ * calculated as:
+ *
+ * HASHFRACTION = 3 / (2 * 2 - 1) = 1
+ *
+ * Note that the division above rounds down, thus if MIN_SUBR_FRACTION
+ * is less than three, this algorithm will not work!
+ *
+ * In practice, however, call instructions are rarely at a minimal
+ * distance. Hence, we will define HASHFRACTION to be 2 across all
+ * architectures. This saves a reasonable amount of space for
+ * profiling data structures without (in practice) sacrificing
+ * any granularity.
+ */
+#define HASHFRACTION 2
+
+/*
+ * Percent of text space to allocate for tostructs.
+ * This is a heuristic; we will fail with a warning when profiling programs
+ * with a very large number of very small functions, but that's
+ * normally OK.
+ * 2 is probably still a good value for normal programs.
+ * Profiling a test case with 64000 small functions will work if
+ * you raise this value to 3 and link statically (which bloats the
+ * text size, thus raising the number of arcs expected by the heuristic).
+ */
+#define ARCDENSITY 3
+
+/*
+ * Always allocate at least this many tostructs. This
+ * hides the inadequacy of the ARCDENSITY heuristic, at least
+ * for small programs.
+ */
+#define MINARCS 50
+
+/*
+ * The type used to represent indices into gmonparam.tos[].
+ */
+#define ARCINDEX unsigned long
+
+/*
+ * Maximum number of arcs we want to allow.
+ * Used to be max representable value of ARCINDEX minus 2, but now
+ * that ARCINDEX is a long, that's too large; we don't really want
+ * to allow a 48 gigabyte table.
+ * The old value of 1<<16 wasn't high enough in practice for large C++
+ * programs; will 1<<20 be adequate for long? FIXME
+ */
+#define MAXARCS (1 << 20)
+
+struct tostruct {
+ unsigned long selfpc;
+ long count;
+ ARCINDEX link;
+};
+
+/*
+ * a raw arc, with pointers to the calling site and
+ * the called site and a count.
+ */
+struct rawarc {
+ unsigned long raw_frompc;
+ unsigned long raw_selfpc;
+ long raw_count;
+};
+
+/*
+ * general rounding functions.
+ */
+#define ROUNDDOWN(x,y) (((x)/(y))*(y))
+#define ROUNDUP(x,y) ((((x)+(y)-1)/(y))*(y))
+
+/*
+ * The profiling data structures are housed in this structure.
+ */
+struct gmonparam {
+ long int state;
+ unsigned short *kcount;
+ unsigned long kcountsize;
+ ARCINDEX *froms;
+ unsigned long fromssize;
+ struct tostruct *tos;
+ unsigned long tossize;
+ long tolimit;
+ unsigned long lowpc;
+ unsigned long highpc;
+ unsigned long textsize;
+ unsigned long hashfraction;
+ long log_hashfraction;
+};
+
+/*
+ * Possible states of profiling.
+ */
+#define GMON_PROF_ON 0
+#define GMON_PROF_BUSY 1
+#define GMON_PROF_ERROR 2
+#define GMON_PROF_OFF 3
+
+/*
+ * Sysctl definitions for extracting profiling information from the kernel.
+ */
+#define GPROF_STATE 0 /* int: profiling enabling variable */
+#define GPROF_COUNT 1 /* struct: profile tick count buffer */
+#define GPROF_FROMS 2 /* struct: from location hash bucket */
+#define GPROF_TOS 3 /* struct: destination/count structure */
+#define GPROF_GMONPARAM 4 /* struct: profiling parameters (see above) */
+
+__BEGIN_DECLS
+
+/* Set up data structures and start profiling. */
+extern void __monstartup (unsigned long __lowpc, unsigned long __highpc) __THROW;
+extern void monstartup (unsigned long __lowpc, unsigned long __highpc) __THROW;
+
+/* Clean up profiling and write out gmon.out. */
+extern void _mcleanup (void) __THROW;
+
+__END_DECLS
+
+#endif /* sys/gmon.h */
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