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
{
29 struct callchain_node
{
30 struct callchain_node
*parent
;
32 struct rb_node rb_node_in
; /* to insert nodes in an rbtree */
33 struct rb_node rb_node
; /* to sort nodes in an output tree */
34 struct rb_root rb_root_in
; /* input tree of children */
35 struct rb_root rb_root
; /* sorted output tree of children */
41 struct callchain_root
{
43 struct callchain_node node
;
46 struct callchain_param
;
48 typedef void (*sort_chain_func_t
)(struct rb_root
*, struct callchain_root
*,
49 u64
, struct callchain_param
*);
56 struct callchain_param
{
58 enum perf_call_graph_mode record_mode
;
63 sort_chain_func_t sort
;
64 enum chain_order order
;
68 extern struct callchain_param callchain_param
;
70 struct callchain_list
{
74 struct list_head list
;
78 * A callchain cursor is a single linked list that
79 * let one feed a callchain progressively.
80 * It keeps persistent allocated entries to minimize
83 struct callchain_cursor_node
{
87 struct callchain_cursor_node
*next
;
90 struct callchain_cursor
{
92 struct callchain_cursor_node
*first
;
93 struct callchain_cursor_node
**last
;
95 struct callchain_cursor_node
*curr
;
98 extern __thread
struct callchain_cursor callchain_cursor
;
100 static inline void callchain_init(struct callchain_root
*root
)
102 INIT_LIST_HEAD(&root
->node
.val
);
104 root
->node
.parent
= NULL
;
106 root
->node
.children_hit
= 0;
107 root
->node
.rb_root_in
= RB_ROOT
;
111 static inline u64
callchain_cumul_hits(struct callchain_node
*node
)
113 return node
->hit
+ node
->children_hit
;
116 int callchain_register_param(struct callchain_param
*param
);
117 int callchain_append(struct callchain_root
*root
,
118 struct callchain_cursor
*cursor
,
121 int callchain_merge(struct callchain_cursor
*cursor
,
122 struct callchain_root
*dst
, struct callchain_root
*src
);
125 * Initialize a cursor before adding entries inside, but keep
126 * the previously allocated entries as a cache.
128 static inline void callchain_cursor_reset(struct callchain_cursor
*cursor
)
131 cursor
->last
= &cursor
->first
;
134 int callchain_cursor_append(struct callchain_cursor
*cursor
, u64 ip
,
135 struct map
*map
, struct symbol
*sym
);
137 /* Close a cursor writing session. Initialize for the reader */
138 static inline void callchain_cursor_commit(struct callchain_cursor
*cursor
)
140 cursor
->curr
= cursor
->first
;
144 /* Cursor reading iteration helpers */
145 static inline struct callchain_cursor_node
*
146 callchain_cursor_current(struct callchain_cursor
*cursor
)
148 if (cursor
->pos
== cursor
->nr
)
154 static inline void callchain_cursor_advance(struct callchain_cursor
*cursor
)
156 cursor
->curr
= cursor
->curr
->next
;
163 int record_parse_callchain_opt(const struct option
*opt
, const char *arg
, int unset
);
164 int record_callchain_opt(const struct option
*opt
, const char *arg
, int unset
);
166 int sample__resolve_callchain(struct perf_sample
*sample
, struct symbol
**parent
,
167 struct perf_evsel
*evsel
, struct addr_location
*al
,
169 int hist_entry__append_callchain(struct hist_entry
*he
, struct perf_sample
*sample
);
170 int fill_callchain_info(struct addr_location
*al
, struct callchain_cursor_node
*node
,
171 bool hide_unresolved
);
173 extern const char record_callchain_help
[];
174 int parse_callchain_record_opt(const char *arg
);
175 int parse_callchain_report_opt(const char *arg
);
176 int perf_callchain_config(const char *var
, const char *value
);
178 static inline void callchain_cursor_snapshot(struct callchain_cursor
*dest
,
179 struct callchain_cursor
*src
)
183 dest
->first
= src
->curr
;
184 dest
->nr
-= src
->pos
;
187 #ifdef HAVE_SKIP_CALLCHAIN_IDX
188 extern int arch_skip_callchain_idx(struct thread
*thread
, struct ip_callchain
*chain
);
190 static inline int arch_skip_callchain_idx(struct thread
*thread __maybe_unused
,
191 struct ip_callchain
*chain __maybe_unused
)
197 char *callchain_list__sym_name(struct callchain_list
*cl
,
198 char *bf
, size_t bfsize
, bool show_dso
);
200 #endif /* __PERF_CALLCHAIN_H */