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 *);
49 struct callchain_param {
53 sort_chain_func_t sort;
54 enum chain_order order;
58 struct callchain_list {
61 struct list_head list;
65 * A callchain cursor is a single linked list that
66 * let one feed a callchain progressively.
67 * It keeps persistent allocated entries to minimize
70 struct callchain_cursor_node {
74 struct callchain_cursor_node *next;
77 struct callchain_cursor {
79 struct callchain_cursor_node *first;
80 struct callchain_cursor_node **last;
82 struct callchain_cursor_node *curr;
85 extern __thread struct callchain_cursor callchain_cursor;
87 static inline void callchain_init(struct callchain_root *root)
89 INIT_LIST_HEAD(&root->node.siblings);
90 INIT_LIST_HEAD(&root->node.children);
91 INIT_LIST_HEAD(&root->node.val);
93 root->node.parent = NULL;
95 root->node.children_hit = 0;
99 static inline u64 callchain_cumul_hits(struct callchain_node *node)
101 return node->hit + node->children_hit;
104 int callchain_register_param(struct callchain_param *param);
105 int callchain_append(struct callchain_root *root,
106 struct callchain_cursor *cursor,
109 int callchain_merge(struct callchain_cursor *cursor,
110 struct callchain_root *dst, struct callchain_root *src);
113 * Initialize a cursor before adding entries inside, but keep
114 * the previously allocated entries as a cache.
116 static inline void callchain_cursor_reset(struct callchain_cursor *cursor)
119 cursor->last = &cursor->first;
122 int callchain_cursor_append(struct callchain_cursor *cursor, u64 ip,
123 struct map *map, struct symbol *sym);
125 /* Close a cursor writing session. Initialize for the reader */
126 static inline void callchain_cursor_commit(struct callchain_cursor *cursor)
128 cursor->curr = cursor->first;
132 /* Cursor reading iteration helpers */
133 static inline struct callchain_cursor_node *
134 callchain_cursor_current(struct callchain_cursor *cursor)
136 if (cursor->pos == cursor->nr)
142 static inline void callchain_cursor_advance(struct callchain_cursor *cursor)
144 cursor->curr = cursor->curr->next;
150 int record_parse_callchain(const char *arg, struct perf_record_opts *opts);
151 int record_parse_callchain_opt(const struct option *opt, const char *arg, int unset);
152 int record_callchain_opt(const struct option *opt, const char *arg, int unset);
154 extern const char record_callchain_help[];
155 #endif /* __PERF_CALLCHAIN_H */