FreeBSD/Linux Kernel Cross Reference
sys/gnu/gcov/gcov.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2019, Matthew Macy <mmacy@freebsd.org>
      *
      * 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.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
     *
     * $FreeBSD$
     *
     */
    
    #ifndef _SYS_GCOV_H_
    #define _SYS_GCOV_H_
    
    MALLOC_DECLARE(M_GCOV);
    
    /*
     * Profiling data types used for gcc 3.4 and above - these are defined by
     * gcc and need to be kept as close to the original definition as possible to
     * remain compatible.
     */
    #define GCOV_DATA_MAGIC         ((unsigned int) 0x67636461)
    #define GCOV_TAG_FUNCTION       ((unsigned int) 0x01000000)
    #define GCOV_TAG_COUNTER_BASE   ((unsigned int) 0x01a10000)
    #define GCOV_TAG_FOR_COUNTER(count)                                     \
            (GCOV_TAG_COUNTER_BASE + ((unsigned int) (count) << 17))
    
    typedef uint64_t gcov_type;
    
    /* Opaque gcov_info. The gcov structures can change as for example in gcc 4.7 so
     * we cannot use full definition here and they need to be placed in gcc specific
     * implementation of gcov. This also means no direct access to the members in
     * generic code and usage of the interface below.*/
    struct gcov_info;
    
    /* Interface to access gcov_info data  */
    const char *gcov_info_filename(struct gcov_info *info);
    unsigned int gcov_info_version(struct gcov_info *info);
    struct gcov_info *gcov_info_next(struct gcov_info *info);
    void gcov_info_link(struct gcov_info *info);
    void gcov_info_unlink(struct gcov_info *prev, struct gcov_info *info);
    
    /* Base interface. */
    enum gcov_action {
            GCOV_ADD,
            GCOV_REMOVE,
    };
    
    /* Iterator control. */
    struct gcov_iterator;
    
    struct gcov_iterator *gcov_iter_new(struct gcov_info *info);
    void gcov_iter_free(struct gcov_iterator *iter);
    void gcov_iter_start(struct gcov_iterator *iter);
    int gcov_iter_next(struct gcov_iterator *iter);
    int gcov_iter_write(struct gcov_iterator *iter, struct sbuf *sbuf);
    struct gcov_info *gcov_iter_get_info(struct gcov_iterator *iter);
    
    /* gcov_info control. */
    void gcov_info_reset(struct gcov_info *info);
    int gcov_info_is_compatible(struct gcov_info *info1, struct gcov_info *info2);
    void gcov_info_add(struct gcov_info *dest, struct gcov_info *source);
    struct gcov_info *gcov_info_dup(struct gcov_info *info);
    void gcov_info_free(struct gcov_info *info);
    void gcov_stats_reset(void);
    void gcov_enable_events(void);
    void gcov_module_unload(void *, module_t);
    void gcov_fs_init(void);
    
    int within_module(vm_offset_t addr, module_t mod);
    
    struct gcov_link {
            enum {
                    OBJ_TREE,
                    SRC_TREE,
            } dir;
            const char *ext;
    };
    extern const struct gcov_link gcov_link[];
    #endif

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