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
 8struct map;
 9struct map_groups;
10struct perf_sample;
11struct symbol;
12struct thread;
13
14struct unwind_entry {
15	struct map	*map;
16	struct symbol	*sym;
17	u64		ip;
18};
19
20typedef int (*unwind_entry_cb_t)(struct unwind_entry *entry, void *arg);
21
22struct unwind_libunwind_ops {
23	int (*prepare_access)(struct map_groups *mg);
24	void (*flush_access)(struct map_groups *mg);
25	void (*finish_access)(struct map_groups *mg);
26	int (*get_entries)(unwind_entry_cb_t cb, void *arg,
27			   struct thread *thread,
28			   struct perf_sample *data, int max_stack);
29};
30
31#ifdef HAVE_DWARF_UNWIND_SUPPORT
 
 
 
 
 
32int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
33			struct thread *thread,
34			struct perf_sample *data, int max_stack);
 
35/* libunwind specific */
36#ifdef HAVE_LIBUNWIND_SUPPORT
37#ifndef LIBUNWIND__ARCH_REG_ID
38#define LIBUNWIND__ARCH_REG_ID(regnum) libunwind__arch_reg_id(regnum)
39#endif
40
41#ifndef LIBUNWIND__ARCH_REG_SP
42#define LIBUNWIND__ARCH_REG_SP PERF_REG_SP
43#endif
44
45#ifndef LIBUNWIND__ARCH_REG_IP
46#define LIBUNWIND__ARCH_REG_IP PERF_REG_IP
47#endif
48
49int LIBUNWIND__ARCH_REG_ID(int regnum);
50int unwind__prepare_access(struct map_groups *mg, struct map *map,
51			   bool *initialized);
52void unwind__flush_access(struct map_groups *mg);
53void unwind__finish_access(struct map_groups *mg);
54#else
55static inline int unwind__prepare_access(struct map_groups *mg __maybe_unused,
56					 struct map *map __maybe_unused,
57					 bool *initialized __maybe_unused)
58{
59	return 0;
60}
61
62static inline void unwind__flush_access(struct map_groups *mg __maybe_unused) {}
63static inline void unwind__finish_access(struct map_groups *mg __maybe_unused) {}
64#endif
65#else
66static inline int
67unwind__get_entries(unwind_entry_cb_t cb __maybe_unused,
68		    void *arg __maybe_unused,
69		    struct thread *thread __maybe_unused,
70		    struct perf_sample *data __maybe_unused,
71		    int max_stack __maybe_unused)
 
72{
73	return 0;
74}
75
76static inline int unwind__prepare_access(struct map_groups *mg __maybe_unused,
77					 struct map *map __maybe_unused,
78					 bool *initialized __maybe_unused)
79{
80	return 0;
81}
82
83static inline void unwind__flush_access(struct map_groups *mg __maybe_unused) {}
84static inline void unwind__finish_access(struct map_groups *mg __maybe_unused) {}
85#endif /* HAVE_DWARF_UNWIND_SUPPORT */
86#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
 
 
 
 
 
 
 
 
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 */