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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#include "util/map_symbol.h"
8
9struct maps;
10struct perf_sample;
11struct thread;
12
13struct unwind_entry {
14 struct map_symbol ms;
15 u64 ip;
16};
17
18typedef int (*unwind_entry_cb_t)(struct unwind_entry *entry, void *arg);
19
20struct unwind_libunwind_ops {
21 int (*prepare_access)(struct maps *maps);
22 void (*flush_access)(struct maps *maps);
23 void (*finish_access)(struct maps *maps);
24 int (*get_entries)(unwind_entry_cb_t cb, void *arg,
25 struct thread *thread,
26 struct perf_sample *data, int max_stack, bool best_effort);
27};
28
29#ifdef HAVE_DWARF_UNWIND_SUPPORT
30/*
31 * When best_effort is set, don't report errors and fail silently. This could
32 * be expanded in the future to be more permissive about things other than
33 * error messages.
34 */
35int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
36 struct thread *thread,
37 struct perf_sample *data, int max_stack,
38 bool best_effort);
39/* libunwind specific */
40#ifdef HAVE_LIBUNWIND_SUPPORT
41#ifndef LIBUNWIND__ARCH_REG_ID
42#define LIBUNWIND__ARCH_REG_ID(regnum) libunwind__arch_reg_id(regnum)
43#endif
44
45#ifndef LIBUNWIND__ARCH_REG_SP
46#define LIBUNWIND__ARCH_REG_SP PERF_REG_SP
47#endif
48
49#ifndef LIBUNWIND__ARCH_REG_IP
50#define LIBUNWIND__ARCH_REG_IP PERF_REG_IP
51#endif
52
53int LIBUNWIND__ARCH_REG_ID(int regnum);
54int unwind__prepare_access(struct maps *maps, struct map *map, bool *initialized);
55void unwind__flush_access(struct maps *maps);
56void unwind__finish_access(struct maps *maps);
57#else
58static inline int unwind__prepare_access(struct maps *maps __maybe_unused,
59 struct map *map __maybe_unused,
60 bool *initialized __maybe_unused)
61{
62 return 0;
63}
64
65static inline void unwind__flush_access(struct maps *maps __maybe_unused) {}
66static inline void unwind__finish_access(struct maps *maps __maybe_unused) {}
67#endif
68#else
69static inline int
70unwind__get_entries(unwind_entry_cb_t cb __maybe_unused,
71 void *arg __maybe_unused,
72 struct thread *thread __maybe_unused,
73 struct perf_sample *data __maybe_unused,
74 int max_stack __maybe_unused,
75 bool best_effort __maybe_unused)
76{
77 return 0;
78}
79
80static inline int unwind__prepare_access(struct maps *maps __maybe_unused,
81 struct map *map __maybe_unused,
82 bool *initialized __maybe_unused)
83{
84 return 0;
85}
86
87static inline void unwind__flush_access(struct maps *maps __maybe_unused) {}
88static inline void unwind__finish_access(struct maps *maps __maybe_unused) {}
89#endif /* HAVE_DWARF_UNWIND_SUPPORT */
90#endif /* __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#include "util/map_symbol.h"
8
9struct maps;
10struct perf_sample;
11struct thread;
12
13struct unwind_entry {
14 struct map_symbol ms;
15 u64 ip;
16};
17
18typedef int (*unwind_entry_cb_t)(struct unwind_entry *entry, void *arg);
19
20struct unwind_libunwind_ops {
21 int (*prepare_access)(struct maps *maps);
22 void (*flush_access)(struct maps *maps);
23 void (*finish_access)(struct maps *maps);
24 int (*get_entries)(unwind_entry_cb_t cb, void *arg,
25 struct thread *thread,
26 struct perf_sample *data, int max_stack);
27};
28
29#ifdef HAVE_DWARF_UNWIND_SUPPORT
30int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
31 struct thread *thread,
32 struct perf_sample *data, int max_stack);
33/* libunwind specific */
34#ifdef HAVE_LIBUNWIND_SUPPORT
35#ifndef LIBUNWIND__ARCH_REG_ID
36#define LIBUNWIND__ARCH_REG_ID(regnum) libunwind__arch_reg_id(regnum)
37#endif
38
39#ifndef LIBUNWIND__ARCH_REG_SP
40#define LIBUNWIND__ARCH_REG_SP PERF_REG_SP
41#endif
42
43#ifndef LIBUNWIND__ARCH_REG_IP
44#define LIBUNWIND__ARCH_REG_IP PERF_REG_IP
45#endif
46
47int LIBUNWIND__ARCH_REG_ID(int regnum);
48int unwind__prepare_access(struct maps *maps, struct map *map, bool *initialized);
49void unwind__flush_access(struct maps *maps);
50void unwind__finish_access(struct maps *maps);
51#else
52static inline int unwind__prepare_access(struct maps *maps __maybe_unused,
53 struct map *map __maybe_unused,
54 bool *initialized __maybe_unused)
55{
56 return 0;
57}
58
59static inline void unwind__flush_access(struct maps *maps __maybe_unused) {}
60static inline void unwind__finish_access(struct maps *maps __maybe_unused) {}
61#endif
62#else
63static inline int
64unwind__get_entries(unwind_entry_cb_t cb __maybe_unused,
65 void *arg __maybe_unused,
66 struct thread *thread __maybe_unused,
67 struct perf_sample *data __maybe_unused,
68 int max_stack __maybe_unused)
69{
70 return 0;
71}
72
73static inline int unwind__prepare_access(struct maps *maps __maybe_unused,
74 struct map *map __maybe_unused,
75 bool *initialized __maybe_unused)
76{
77 return 0;
78}
79
80static inline void unwind__flush_access(struct maps *maps __maybe_unused) {}
81static inline void unwind__finish_access(struct maps *maps __maybe_unused) {}
82#endif /* HAVE_DWARF_UNWIND_SUPPORT */
83#endif /* __UNWIND_H */