call-path.h

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/*
 * call-path.h: Manipulate a tree data structure containing function call paths
 * Copyright (c) 2014, Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 */

#ifndef __PERF_CALL_PATH_H
#define __PERF_CALL_PATH_H

#include <sys/types.h>

#include <linux/types.h>
#include <linux/rbtree.h>

struct call_path {
    struct call_path *parent;
    struct symbol *sym;
    u64 ip;
    u64 db_id;
    bool in_kernel;
    struct rb_node rb_node;
    struct rb_root children;
};

#define CALL_PATH_BLOCK_SHIFT 8
#define CALL_PATH_BLOCK_SIZE (1 << CALL_PATH_BLOCK_SHIFT)
#define CALL_PATH_BLOCK_MASK (CALL_PATH_BLOCK_SIZE - 1)

struct call_path_block {
    struct call_path cp[CALL_PATH_BLOCK_SIZE];
    struct list_head node;
};

struct call_path_root {
    struct call_path call_path;
    struct list_head blocks;
    size_t next;
    size_t sz;
};

struct call_path_root *call_path_root__new(void);
void call_path_root__free(struct call_path_root *cpr);

struct call_path *call_path__findnew(struct call_path_root *cpr,
                     struct call_path *parent,
                     struct symbol *sym, u64 ip, u64 ks);

#endif