GNU Linux-libre 4.19.211-gnu1
[releases.git] / tools / perf / util / unwind.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __UNWIND_H
3 #define __UNWIND_H
4
5 #include <linux/compiler.h>
6 #include <linux/types.h>
7
8 struct map;
9 struct perf_sample;
10 struct symbol;
11 struct thread;
12
13 struct unwind_entry {
14         struct map      *map;
15         struct symbol   *sym;
16         u64             ip;
17 };
18
19 typedef int (*unwind_entry_cb_t)(struct unwind_entry *entry, void *arg);
20
21 struct unwind_libunwind_ops {
22         int (*prepare_access)(struct thread *thread);
23         void (*flush_access)(struct thread *thread);
24         void (*finish_access)(struct thread *thread);
25         int (*get_entries)(unwind_entry_cb_t cb, void *arg,
26                            struct thread *thread,
27                            struct perf_sample *data, int max_stack);
28 };
29
30 #ifdef HAVE_DWARF_UNWIND_SUPPORT
31 int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
32                         struct thread *thread,
33                         struct perf_sample *data, int max_stack);
34 /* libunwind specific */
35 #ifdef HAVE_LIBUNWIND_SUPPORT
36 #ifndef LIBUNWIND__ARCH_REG_ID
37 #define LIBUNWIND__ARCH_REG_ID(regnum) libunwind__arch_reg_id(regnum)
38 #endif
39
40 #ifndef LIBUNWIND__ARCH_REG_SP
41 #define LIBUNWIND__ARCH_REG_SP PERF_REG_SP
42 #endif
43
44 #ifndef LIBUNWIND__ARCH_REG_IP
45 #define LIBUNWIND__ARCH_REG_IP PERF_REG_IP
46 #endif
47
48 int LIBUNWIND__ARCH_REG_ID(int regnum);
49 int unwind__prepare_access(struct thread *thread, struct map *map,
50                            bool *initialized);
51 void unwind__flush_access(struct thread *thread);
52 void unwind__finish_access(struct thread *thread);
53 #else
54 static inline int unwind__prepare_access(struct thread *thread __maybe_unused,
55                                          struct map *map __maybe_unused,
56                                          bool *initialized __maybe_unused)
57 {
58         return 0;
59 }
60
61 static inline void unwind__flush_access(struct thread *thread __maybe_unused) {}
62 static inline void unwind__finish_access(struct thread *thread __maybe_unused) {}
63 #endif
64 #else
65 static inline int
66 unwind__get_entries(unwind_entry_cb_t cb __maybe_unused,
67                     void *arg __maybe_unused,
68                     struct thread *thread __maybe_unused,
69                     struct perf_sample *data __maybe_unused,
70                     int max_stack __maybe_unused)
71 {
72         return 0;
73 }
74
75 static inline int unwind__prepare_access(struct thread *thread __maybe_unused,
76                                          struct map *map __maybe_unused,
77                                          bool *initialized __maybe_unused)
78 {
79         return 0;
80 }
81
82 static inline void unwind__flush_access(struct thread *thread __maybe_unused) {}
83 static inline void unwind__finish_access(struct thread *thread __maybe_unused) {}
84 #endif /* HAVE_DWARF_UNWIND_SUPPORT */
85 #endif /* __UNWIND_H */