1 #ifndef __PERF_CALLCHAIN_H
2 #define __PERF_CALLCHAIN_H
5 #include <linux/list.h>
6 #include <linux/rbtree.h>
10 #define CALLCHAIN_HELP "setup and enables call-graph (stack chain/backtrace) recording: "
12 #ifdef HAVE_DWARF_UNWIND_SUPPORT
13 #define CALLCHAIN_RECORD_HELP CALLCHAIN_HELP "fp dwarf lbr"
15 #define CALLCHAIN_RECORD_HELP CALLCHAIN_HELP "fp lbr"
18 #define CALLCHAIN_REPORT_HELP "output_type (graph, flat, fractal, or none), " \
19 "min percent threshold, optional print limit, callchain order, " \
20 "key (function or address), add branches"
22 enum perf_call_graph_mode {
42 struct callchain_node {
43 struct callchain_node *parent;
45 struct rb_node rb_node_in; /* to insert nodes in an rbtree */
46 struct rb_node rb_node; /* to sort nodes in an output tree */
47 struct rb_root rb_root_in; /* input tree of children */
48 struct rb_root rb_root; /* sorted output tree of children */
54 struct callchain_root {
56 struct callchain_node node;
59 struct callchain_param;
61 typedef void (*sort_chain_func_t)(struct rb_root *, struct callchain_root *,
62 u64, struct callchain_param *);
69 struct callchain_param {
71 enum perf_call_graph_mode record_mode;
76 sort_chain_func_t sort;
77 enum chain_order order;
79 bool branch_callstack;
82 extern struct callchain_param callchain_param;
84 struct callchain_list {
87 struct /* for TUI */ {
92 struct list_head list;
96 * A callchain cursor is a single linked list that
97 * let one feed a callchain progressively.
98 * It keeps persistent allocated entries to minimize
101 struct callchain_cursor_node {
105 struct callchain_cursor_node *next;
108 struct callchain_cursor {
110 struct callchain_cursor_node *first;
111 struct callchain_cursor_node **last;
113 struct callchain_cursor_node *curr;
116 extern __thread struct callchain_cursor callchain_cursor;
118 static inline void callchain_init(struct callchain_root *root)
120 INIT_LIST_HEAD(&root->node.val);
122 root->node.parent = NULL;
124 root->node.children_hit = 0;
125 root->node.rb_root_in = RB_ROOT;
129 static inline u64 callchain_cumul_hits(struct callchain_node *node)
131 return node->hit + node->children_hit;
134 int callchain_register_param(struct callchain_param *param);
135 int callchain_append(struct callchain_root *root,
136 struct callchain_cursor *cursor,
139 int callchain_merge(struct callchain_cursor *cursor,
140 struct callchain_root *dst, struct callchain_root *src);
143 * Initialize a cursor before adding entries inside, but keep
144 * the previously allocated entries as a cache.
146 static inline void callchain_cursor_reset(struct callchain_cursor *cursor)
149 cursor->last = &cursor->first;
152 int callchain_cursor_append(struct callchain_cursor *cursor, u64 ip,
153 struct map *map, struct symbol *sym);
155 /* Close a cursor writing session. Initialize for the reader */
156 static inline void callchain_cursor_commit(struct callchain_cursor *cursor)
158 cursor->curr = cursor->first;
162 /* Cursor reading iteration helpers */
163 static inline struct callchain_cursor_node *
164 callchain_cursor_current(struct callchain_cursor *cursor)
166 if (cursor->pos == cursor->nr)
172 static inline void callchain_cursor_advance(struct callchain_cursor *cursor)
174 cursor->curr = cursor->curr->next;
181 int record_parse_callchain_opt(const struct option *opt, const char *arg, int unset);
182 int record_callchain_opt(const struct option *opt, const char *arg, int unset);
184 int sample__resolve_callchain(struct perf_sample *sample, struct symbol **parent,
185 struct perf_evsel *evsel, struct addr_location *al,
187 int hist_entry__append_callchain(struct hist_entry *he, struct perf_sample *sample);
188 int fill_callchain_info(struct addr_location *al, struct callchain_cursor_node *node,
189 bool hide_unresolved);
191 extern const char record_callchain_help[];
192 extern int parse_callchain_record(const char *arg, struct callchain_param *param);
193 int parse_callchain_record_opt(const char *arg, struct callchain_param *param);
194 int parse_callchain_report_opt(const char *arg);
195 int perf_callchain_config(const char *var, const char *value);
197 static inline void callchain_cursor_snapshot(struct callchain_cursor *dest,
198 struct callchain_cursor *src)
202 dest->first = src->curr;
203 dest->nr -= src->pos;
206 #ifdef HAVE_SKIP_CALLCHAIN_IDX
207 extern int arch_skip_callchain_idx(struct thread *thread, struct ip_callchain *chain);
209 static inline int arch_skip_callchain_idx(struct thread *thread __maybe_unused,
210 struct ip_callchain *chain __maybe_unused)
216 char *callchain_list__sym_name(struct callchain_list *cl,
217 char *bf, size_t bfsize, bool show_dso);
219 void free_callchain(struct callchain_root *root);
221 #endif /* __PERF_CALLCHAIN_H */