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2025cf9e | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
451db126 CP |
2 | /* |
3 | * call-path.h: Manipulate a tree data structure containing function call paths | |
4 | * Copyright (c) 2014, Intel Corporation. | |
451db126 CP |
5 | */ |
6 | ||
7 | #ifndef __PERF_CALL_PATH_H | |
8 | #define __PERF_CALL_PATH_H | |
9 | ||
10 | #include <sys/types.h> | |
11 | ||
12 | #include <linux/types.h> | |
13 | #include <linux/rbtree.h> | |
14 | ||
15 | /** | |
16 | * struct call_path - node in list of calls leading to a function call. | |
17 | * @parent: call path to the parent function call | |
18 | * @sym: symbol of function called | |
19 | * @ip: only if sym is null, the ip of the function | |
20 | * @db_id: id used for db-export | |
21 | * @in_kernel: whether function is a in the kernel | |
22 | * @rb_node: node in parent's tree of called functions | |
23 | * @children: tree of call paths of functions called | |
24 | * | |
25 | * In combination with the call_return structure, the call_path structure | |
26 | * defines a context-sensitve call-graph. | |
27 | */ | |
28 | struct call_path { | |
29 | struct call_path *parent; | |
30 | struct symbol *sym; | |
31 | u64 ip; | |
32 | u64 db_id; | |
33 | bool in_kernel; | |
34 | struct rb_node rb_node; | |
35 | struct rb_root children; | |
36 | }; | |
37 | ||
38 | #define CALL_PATH_BLOCK_SHIFT 8 | |
39 | #define CALL_PATH_BLOCK_SIZE (1 << CALL_PATH_BLOCK_SHIFT) | |
40 | #define CALL_PATH_BLOCK_MASK (CALL_PATH_BLOCK_SIZE - 1) | |
41 | ||
42 | struct call_path_block { | |
43 | struct call_path cp[CALL_PATH_BLOCK_SIZE]; | |
44 | struct list_head node; | |
45 | }; | |
46 | ||
47 | /** | |
48 | * struct call_path_root - root of all call paths. | |
49 | * @call_path: root call path | |
50 | * @blocks: list of blocks to store call paths | |
51 | * @next: next free space | |
52 | * @sz: number of spaces | |
53 | */ | |
54 | struct call_path_root { | |
55 | struct call_path call_path; | |
56 | struct list_head blocks; | |
57 | size_t next; | |
58 | size_t sz; | |
59 | }; | |
60 | ||
61 | struct call_path_root *call_path_root__new(void); | |
62 | void call_path_root__free(struct call_path_root *cpr); | |
63 | ||
64 | struct call_path *call_path__findnew(struct call_path_root *cpr, | |
65 | struct call_path *parent, | |
66 | struct symbol *sym, u64 ip, u64 ks); | |
67 | ||
68 | #endif |