tools/perf/util/callchain.h

   1 #ifndef __PERF_CALLCHAIN_H
   2 #define __PERF_CALLCHAIN_H
   3
   4 #include "../perf.h"
   5 #include <linux/list.h>
   6 #include <linux/rbtree.h>
   7 #include "event.h"
   8 #include "symbol.h"
   9
  10 enum chain_mode {
  11         CHAIN_NONE,
  12         CHAIN_FLAT,
  13         CHAIN_GRAPH_ABS,
  14         CHAIN_GRAPH_REL
  15 };
  16
  17 struct callchain_node {
  18         struct callchain_node   *parent;
  19         struct list_head        brothers;
  20         struct list_head        children;
  21         struct list_head        val;
  22         struct rb_node          rb_node; /* to sort nodes in an rbtree */
  23         struct rb_root          rb_root; /* sorted tree of children */
  24         unsigned int            val_nr;
  25         u64                     hit;
  26         u64                     children_hit;
  27 };
  28
  29 struct callchain_root {
  30         u64                     max_depth;
  31         struct callchain_node   node;
  32 };
  33
  34 struct callchain_param;
  35
  36 typedef void (*sort_chain_func_t)(struct rb_root *, struct callchain_root *,
  37                                  u64, struct callchain_param *);
  38
  39 struct callchain_param {
  40         enum chain_mode         mode;
  41         u32                     print_limit;
  42         double                  min_percent;
  43         sort_chain_func_t       sort;
  44 };
  45
  46 struct callchain_list {
  47         u64                     ip;
  48         struct map_symbol       ms;
  49         struct list_head        list;
  50 };
  51
  52 static inline void callchain_init(struct callchain_root *root)
  53 {
  54         INIT_LIST_HEAD(&root->node.brothers);
  55         INIT_LIST_HEAD(&root->node.children);
  56         INIT_LIST_HEAD(&root->node.val);
  57
  58         root->node.parent = NULL;
  59         root->node.hit = 0;
  60         root->node.children_hit = 0;
  61         root->max_depth = 0;
  62 }
  63
  64 static inline u64 cumul_hits(struct callchain_node *node)
  65 {
  66         return node->hit + node->children_hit;
  67 }
  68
  69 int register_callchain_param(struct callchain_param *param);
  70 int callchain_append(struct callchain_root *root, struct ip_callchain *chain,
  71                      struct map_symbol *syms, u64 period);
  72 int callchain_merge(struct callchain_root *dst, struct callchain_root *src);
  73
  74 bool ip_callchain__valid(struct ip_callchain *chain, const event_t *event);
  75 #endif  /* __PERF_CALLCHAIN_H */