2 * call-path.h: Manipulate a tree data structure containing function call paths
3 * Copyright (c) 2014, Intel Corporation.
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 #ifndef __PERF_CALL_PATH_H
17 #define __PERF_CALL_PATH_H
19 #include <sys/types.h>
21 #include <linux/types.h>
22 #include <linux/rbtree.h>
25 * struct call_path - node in list of calls leading to a function call.
26 * @parent: call path to the parent function call
27 * @sym: symbol of function called
28 * @ip: only if sym is null, the ip of the function
29 * @db_id: id used for db-export
30 * @in_kernel: whether function is a in the kernel
31 * @rb_node: node in parent's tree of called functions
32 * @children: tree of call paths of functions called
34 * In combination with the call_return structure, the call_path structure
35 * defines a context-sensitve call-graph.
38 struct call_path *parent;
43 struct rb_node rb_node;
44 struct rb_root children;
47 #define CALL_PATH_BLOCK_SHIFT 8
48 #define CALL_PATH_BLOCK_SIZE (1 << CALL_PATH_BLOCK_SHIFT)
49 #define CALL_PATH_BLOCK_MASK (CALL_PATH_BLOCK_SIZE - 1)
51 struct call_path_block {
52 struct call_path cp[CALL_PATH_BLOCK_SIZE];
53 struct list_head node;
57 * struct call_path_root - root of all call paths.
58 * @call_path: root call path
59 * @blocks: list of blocks to store call paths
60 * @next: next free space
61 * @sz: number of spaces
63 struct call_path_root {
64 struct call_path call_path;
65 struct list_head blocks;
70 struct call_path_root *call_path_root__new(void);
71 void call_path_root__free(struct call_path_root *cpr);
73 struct call_path *call_path__findnew(struct call_path_root *cpr,
74 struct call_path *parent,
75 struct symbol *sym, u64 ip, u64 ks);