1 #ifndef __PERF_CALLCHAIN_H
2 #define __PERF_CALLCHAIN_H
5 #include <linux/list.h>
6 #include <linux/rbtree.h>
17 struct callchain_node {
18 struct callchain_node *parent;
19 struct list_head brothers;
20 struct list_head children;
22 struct rb_node rb_node; /* to sort nodes in an rbtree */
23 struct rb_root rb_root; /* sorted tree of children */
29 struct callchain_root {
31 struct callchain_node node;
34 struct callchain_param;
36 typedef void (*sort_chain_func_t)(struct rb_root *, struct callchain_root *,
37 u64, struct callchain_param *);
39 struct callchain_param {
43 sort_chain_func_t sort;
46 struct callchain_list {
49 struct list_head list;
53 * A callchain cursor is a single linked list that
54 * let one feed a callchain progressively.
55 * It keeps persitent allocated entries to minimize
58 struct callchain_cursor_node {
62 struct callchain_cursor_node *next;
65 struct callchain_cursor {
67 struct callchain_cursor_node *first;
68 struct callchain_cursor_node **last;
70 struct callchain_cursor_node *curr;
73 static inline void callchain_init(struct callchain_root *root)
75 INIT_LIST_HEAD(&root->node.brothers);
76 INIT_LIST_HEAD(&root->node.children);
77 INIT_LIST_HEAD(&root->node.val);
79 root->node.parent = NULL;
81 root->node.children_hit = 0;
85 static inline u64 callchain_cumul_hits(struct callchain_node *node)
87 return node->hit + node->children_hit;
90 int register_callchain_param(struct callchain_param *param);
91 int callchain_append(struct callchain_root *root,
92 struct callchain_cursor *cursor,
95 int callchain_merge(struct callchain_cursor *cursor,
96 struct callchain_root *dst, struct callchain_root *src);
98 bool ip_callchain__valid(struct ip_callchain *chain, const event_t *event);
101 * Initialize a cursor before adding entries inside, but keep
102 * the previously allocated entries as a cache.
104 static inline void callchain_cursor_reset(struct callchain_cursor *cursor)
107 cursor->last = &cursor->first;
110 int callchain_cursor_append(struct callchain_cursor *cursor, u64 ip,
111 struct map *map, struct symbol *sym);
113 /* Close a cursor writing session. Initialize for the reader */
114 static inline void callchain_cursor_commit(struct callchain_cursor *cursor)
116 cursor->curr = cursor->first;
120 /* Cursor reading iteration helpers */
121 static inline struct callchain_cursor_node *
122 callchain_cursor_current(struct callchain_cursor *cursor)
124 if (cursor->pos == cursor->nr)
130 static inline void callchain_cursor_advance(struct callchain_cursor *cursor)
132 cursor->curr = cursor->curr->next;
135 #endif /* __PERF_CALLCHAIN_H */