gprof/bb_exit_func.c

/*
 * Copyright (c) 1994 David Mosberger-Tang.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Library General Public License as
 * published by the Free Software Foundation; either version 2, or (at
 * your option) any later version.
 *
 * __bb_exit_func() dumps all the basic-block statistics linked into
 * the bb_head chain to .d files.
 */
#include <stdio.h>
#include <strings.h>
#include "bfd.h"
#include "gmon_out.h"

/* structure emitted by -a */
struct bb {
    long		zero_word;
    const char		*filename;
    long		*counts;
    long		ncounts;
    struct bb		*next;
    const unsigned long	*addresses;
};

struct bb *__bb_head = (struct bb *)0;


void
__bb_exit_func (void)
{
    const int version = GMON_VERSION;
    struct gmon_hdr ghdr;
    struct bb *ptr;
    FILE *fp;
    /*
     * GEN_GMON_CNT_FILE should be defined on systems with mcleanup()
     * functions that do not write basic-block to gmon.out.  In such
     * cases profiling with "-pg -a" would result in a gmon.out file
     * without basic-block info (because the file written here would
     * be overwritten.  Thus, a separate file is generated instead.
     * The two files can easily be combined by specifying them
     * on gprof's command line (and possibly generating a gmon.sum
     * file with "gprof -s").
     */
#ifndef GEN_GMON_CNT_FILE
#   define OUT_NAME	"gmon.out"
#else
#   define OUT_NAME	"gmon.cnt"
#endif
    fp = fopen(OUT_NAME, "wb");
    if (!fp) {
	perror(OUT_NAME);
	return;
    } /* if */
    memcpy(&ghdr.cookie[0], GMON_MAGIC, 4);
    memcpy(&ghdr.version, &version, sizeof(version));
    fwrite(&ghdr, sizeof(ghdr), 1, fp);

    for (ptr = __bb_head; ptr != 0; ptr = ptr->next) {
	u_int ncounts = ptr->ncounts;
	u_char tag;
	u_int i;

	tag = GMON_TAG_BB_COUNT;
	fwrite(&tag, sizeof(tag), 1, fp);
	fwrite(&ncounts, sizeof(ncounts), 1, fp);

	for (i = 0; i < ncounts; ++i) {
	    fwrite(&ptr->addresses[i], sizeof(ptr->addresses[0]), 1, fp);
	    fwrite(&ptr->counts[i], sizeof(ptr->counts[0]), 1, fp);
	} /* for */
    } /* for */
    fclose (fp);
} /* __bb_exit_func */

			/*** end of __bb_exit_func.c ***/