1 #ifndef __PERF_CALLCHAIN_H
2 #define __PERF_CALLCHAIN_H
5 #include <linux/list.h>
6 #include <linux/rbtree.h>
22 struct callchain_node {
23 struct callchain_node *parent;
24 struct list_head siblings;
25 struct list_head children;
27 struct rb_node rb_node; /* to sort nodes in an rbtree */
28 struct rb_root rb_root; /* sorted tree of children */
34 struct callchain_root {
36 struct callchain_node node;
39 struct callchain_param;
41 typedef void (*sort_chain_func_t)(struct rb_root *, struct callchain_root *,
42 u64, struct callchain_param *);
44 struct callchain_param {
48 sort_chain_func_t sort;
49 enum chain_order order;
52 struct callchain_list {
55 struct list_head list;
59 * A callchain cursor is a single linked list that
60 * let one feed a callchain progressively.
61 * It keeps persistent allocated entries to minimize
64 struct callchain_cursor_node {
68 struct callchain_cursor_node *next;
71 struct callchain_cursor {
73 struct callchain_cursor_node *first;
74 struct callchain_cursor_node **last;
76 struct callchain_cursor_node *curr;
79 extern __thread struct callchain_cursor callchain_cursor;
81 static inline void callchain_init(struct callchain_root *root)
83 INIT_LIST_HEAD(&root->node.siblings);
84 INIT_LIST_HEAD(&root->node.children);
85 INIT_LIST_HEAD(&root->node.val);
87 root->node.parent = NULL;
89 root->node.children_hit = 0;
93 static inline u64 callchain_cumul_hits(struct callchain_node *node)
95 return node->hit + node->children_hit;
98 int callchain_register_param(struct callchain_param *param);
99 int callchain_append(struct callchain_root *root,
100 struct callchain_cursor *cursor,
103 int callchain_merge(struct callchain_cursor *cursor,
104 struct callchain_root *dst, struct callchain_root *src);
109 bool ip_callchain__valid(struct ip_callchain *chain,
110 const union perf_event *event);
112 * Initialize a cursor before adding entries inside, but keep
113 * the previously allocated entries as a cache.
115 static inline void callchain_cursor_reset(struct callchain_cursor *cursor)
118 cursor->last = &cursor->first;
121 int callchain_cursor_append(struct callchain_cursor *cursor, u64 ip,
122 struct map *map, struct symbol *sym);
124 /* Close a cursor writing session. Initialize for the reader */
125 static inline void callchain_cursor_commit(struct callchain_cursor *cursor)
127 cursor->curr = cursor->first;
131 /* Cursor reading iteration helpers */
132 static inline struct callchain_cursor_node *
133 callchain_cursor_current(struct callchain_cursor *cursor)
135 if (cursor->pos == cursor->nr)
141 static inline void callchain_cursor_advance(struct callchain_cursor *cursor)
143 cursor->curr = cursor->curr->next;
149 int record_parse_callchain_opt(const struct option *opt, const char *arg, int unset);
150 extern const char record_callchain_help[];
151 #endif /* __PERF_CALLCHAIN_H */