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
 
 
 
 
 
 
 
 
45int LIBUNWIND__ARCH_REG_ID(int regnum);
46int unwind__prepare_access(struct maps *maps, struct map *map, bool *initialized);
47void unwind__flush_access(struct maps *maps);
48void unwind__finish_access(struct maps *maps);
49#else
50static inline int unwind__prepare_access(struct maps *maps __maybe_unused,
51					 struct map *map __maybe_unused,
52					 bool *initialized __maybe_unused)
53{
54	return 0;
55}
56
57static inline void unwind__flush_access(struct maps *maps __maybe_unused) {}
58static inline void unwind__finish_access(struct maps *maps __maybe_unused) {}
59#endif
60#else
61static inline int
62unwind__get_entries(unwind_entry_cb_t cb __maybe_unused,
63		    void *arg __maybe_unused,
64		    struct thread *thread __maybe_unused,
65		    struct perf_sample *data __maybe_unused,
66		    int max_stack __maybe_unused,
67		    bool best_effort __maybe_unused)
68{
69	return 0;
70}
71
72static inline int unwind__prepare_access(struct maps *maps __maybe_unused,
73					 struct map *map __maybe_unused,
74					 bool *initialized __maybe_unused)
75{
76	return 0;
77}
78
79static inline void unwind__flush_access(struct maps *maps __maybe_unused) {}
80static inline void unwind__finish_access(struct maps *maps __maybe_unused) {}
81#endif /* HAVE_DWARF_UNWIND_SUPPORT */
82#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, 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 */