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 enum chain_order { 18 ORDER_CALLER, 19 ORDER_CALLEE 20 }; 21 22 struct callchain_node { 23 struct callchain_node *parent; 24 struct list_head siblings; 25 struct list_head children; 26 struct list_head val; 27 struct rb_node rb_node; /* to sort nodes in an rbtree */ 28 struct rb_root rb_root; /* sorted tree of children */ 29 unsigned int val_nr; 30 u64 hit; 31 u64 children_hit; 32 }; 33 34 struct callchain_root { 35 u64 max_depth; 36 struct callchain_node node; 37 }; 38 39 struct callchain_param; 40 41 typedef void (*sort_chain_func_t)(struct rb_root *, struct callchain_root *, 42 u64, struct callchain_param *); 43 44 enum chain_key { 45 CCKEY_FUNCTION, 46 CCKEY_ADDRESS 47 }; 48 49 struct callchain_param { 50 enum chain_mode mode; 51 u32 print_limit; 52 double min_percent; 53 sort_chain_func_t sort; 54 enum chain_order order; 55 enum chain_key key; 56 }; 57 58 struct callchain_list { 59 u64 ip; 60 struct map_symbol ms; 61 struct list_head list; 62 }; 63 64 /* 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 68 * allocations. 69 */ 70 struct callchain_cursor_node { 71 u64 ip; 72 struct map *map; 73 struct symbol *sym; 74 struct callchain_cursor_node *next; 75 }; 76 77 struct callchain_cursor { 78 u64 nr; 79 struct callchain_cursor_node *first; 80 struct callchain_cursor_node **last; 81 u64 pos; 82 struct callchain_cursor_node *curr; 83 }; 84 85 extern __thread struct callchain_cursor callchain_cursor; 86 87 static inline void callchain_init(struct callchain_root *root) 88 { 89 INIT_LIST_HEAD(&root->node.siblings); 90 INIT_LIST_HEAD(&root->node.children); 91 INIT_LIST_HEAD(&root->node.val); 92 93 root->node.parent = NULL; 94 root->node.hit = 0; 95 root->node.children_hit = 0; 96 root->max_depth = 0; 97 } 98 99 static inline u64 callchain_cumul_hits(struct callchain_node *node) 100 { 101 return node->hit + node->children_hit; 102 } 103 104 int callchain_register_param(struct callchain_param *param); 105 int callchain_append(struct callchain_root *root, 106 struct callchain_cursor *cursor, 107 u64 period); 108 109 int callchain_merge(struct callchain_cursor *cursor, 110 struct callchain_root *dst, struct callchain_root *src); 111 112 /* 113 * Initialize a cursor before adding entries inside, but keep 114 * the previously allocated entries as a cache. 115 */ 116 static inline void callchain_cursor_reset(struct callchain_cursor *cursor) 117 { 118 cursor->nr = 0; 119 cursor->last = &cursor->first; 120 } 121 122 int callchain_cursor_append(struct callchain_cursor *cursor, u64 ip, 123 struct map *map, struct symbol *sym); 124 125 /* Close a cursor writing session. Initialize for the reader */ 126 static inline void callchain_cursor_commit(struct callchain_cursor *cursor) 127 { 128 cursor->curr = cursor->first; 129 cursor->pos = 0; 130 } 131 132 /* Cursor reading iteration helpers */ 133 static inline struct callchain_cursor_node * 134 callchain_cursor_current(struct callchain_cursor *cursor) 135 { 136 if (cursor->pos == cursor->nr) 137 return NULL; 138 139 return cursor->curr; 140 } 141 142 static inline void callchain_cursor_advance(struct callchain_cursor *cursor) 143 { 144 cursor->curr = cursor->curr->next; 145 cursor->pos++; 146 } 147 148 struct option; 149 150 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); 153 154 extern const char record_callchain_help[]; 155 #endif /* __PERF_CALLCHAIN_H */ 156
