1 #ifndef __PERF_CALLCHAIN_H
2 #define __PERF_CALLCHAIN_H
5 #include <linux/list.h>
6 #include <linux/rbtree.h>
10 enum perf_call_graph_mode {
30 struct callchain_node {
31 struct callchain_node *parent;
33 struct rb_node rb_node_in; /* to insert nodes in an rbtree */
34 struct rb_node rb_node; /* to sort nodes in an output tree */
35 struct rb_root rb_root_in; /* input tree of children */
36 struct rb_root rb_root; /* sorted output tree of children */
42 struct callchain_root {
44 struct callchain_node node;
47 struct callchain_param;
49 typedef void (*sort_chain_func_t)(struct rb_root *, struct callchain_root *,
50 u64, struct callchain_param *);
57 struct callchain_param {
59 enum perf_call_graph_mode record_mode;
64 sort_chain_func_t sort;
65 enum chain_order order;
67 bool branch_callstack;
70 extern struct callchain_param callchain_param;
72 struct callchain_list {
76 struct list_head list;
80 * A callchain cursor is a single linked list that
81 * let one feed a callchain progressively.
82 * It keeps persistent allocated entries to minimize
85 struct callchain_cursor_node {
89 struct callchain_cursor_node *next;
92 struct callchain_cursor {
94 struct callchain_cursor_node *first;
95 struct callchain_cursor_node **last;
97 struct callchain_cursor_node *curr;
100 extern __thread struct callchain_cursor callchain_cursor;
102 static inline void callchain_init(struct callchain_root *root)
104 INIT_LIST_HEAD(&root->node.val);
106 root->node.parent = NULL;
108 root->node.children_hit = 0;
109 root->node.rb_root_in = RB_ROOT;
113 static inline u64 callchain_cumul_hits(struct callchain_node *node)
115 return node->hit + node->children_hit;
118 int callchain_register_param(struct callchain_param *param);
119 int callchain_append(struct callchain_root *root,
120 struct callchain_cursor *cursor,
123 int callchain_merge(struct callchain_cursor *cursor,
124 struct callchain_root *dst, struct callchain_root *src);
127 * Initialize a cursor before adding entries inside, but keep
128 * the previously allocated entries as a cache.
130 static inline void callchain_cursor_reset(struct callchain_cursor *cursor)
133 cursor->last = &cursor->first;
136 int callchain_cursor_append(struct callchain_cursor *cursor, u64 ip,
137 struct map *map, struct symbol *sym);
139 /* Close a cursor writing session. Initialize for the reader */
140 static inline void callchain_cursor_commit(struct callchain_cursor *cursor)
142 cursor->curr = cursor->first;
146 /* Cursor reading iteration helpers */
147 static inline struct callchain_cursor_node *
148 callchain_cursor_current(struct callchain_cursor *cursor)
150 if (cursor->pos == cursor->nr)
156 static inline void callchain_cursor_advance(struct callchain_cursor *cursor)
158 cursor->curr = cursor->curr->next;
165 int record_parse_callchain_opt(const struct option *opt, const char *arg, int unset);
166 int record_callchain_opt(const struct option *opt, const char *arg, int unset);
168 int sample__resolve_callchain(struct perf_sample *sample, struct symbol **parent,
169 struct perf_evsel *evsel, struct addr_location *al,
171 int hist_entry__append_callchain(struct hist_entry *he, struct perf_sample *sample);
172 int fill_callchain_info(struct addr_location *al, struct callchain_cursor_node *node,
173 bool hide_unresolved);
175 extern const char record_callchain_help[];
176 int parse_callchain_record_opt(const char *arg);
177 int parse_callchain_report_opt(const char *arg);
178 int perf_callchain_config(const char *var, const char *value);
180 static inline void callchain_cursor_snapshot(struct callchain_cursor *dest,
181 struct callchain_cursor *src)
185 dest->first = src->curr;
186 dest->nr -= src->pos;
189 #ifdef HAVE_SKIP_CALLCHAIN_IDX
190 extern int arch_skip_callchain_idx(struct thread *thread, struct ip_callchain *chain);
192 static inline int arch_skip_callchain_idx(struct thread *thread __maybe_unused,
193 struct ip_callchain *chain __maybe_unused)
199 char *callchain_list__sym_name(struct callchain_list *cl,
200 char *bf, size_t bfsize, bool show_dso);
202 void free_callchain(struct callchain_root *root);
204 #endif /* __PERF_CALLCHAIN_H */