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#ifndef __UNWIND_H
 2#define __UNWIND_H
 3
 
 4#include <linux/types.h>
 5#include "event.h"
 6#include "symbol.h"
 7#include "thread.h"
 
 
 8
 9struct unwind_entry {
10	struct map	*map;
11	struct symbol	*sym;
12	u64		ip;
13};
14
15typedef int (*unwind_entry_cb_t)(struct unwind_entry *entry, void *arg);
16
 
 
 
 
 
 
 
 
 
17#ifdef HAVE_DWARF_UNWIND_SUPPORT
 
 
 
 
 
18int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
19			struct thread *thread,
20			struct perf_sample *data, int max_stack);
 
21/* libunwind specific */
22#ifdef HAVE_LIBUNWIND_SUPPORT
23int libunwind__arch_reg_id(int regnum);
24int unwind__prepare_access(struct thread *thread);
25void unwind__flush_access(struct thread *thread);
26void unwind__finish_access(struct thread *thread);
 
 
 
 
27#else
28static inline int unwind__prepare_access(struct thread *thread __maybe_unused)
 
 
29{
30	return 0;
31}
32
33static inline void unwind__flush_access(struct thread *thread __maybe_unused) {}
34static inline void unwind__finish_access(struct thread *thread __maybe_unused) {}
35#endif
36#else
37static inline int
38unwind__get_entries(unwind_entry_cb_t cb __maybe_unused,
39		    void *arg __maybe_unused,
40		    struct thread *thread __maybe_unused,
41		    struct perf_sample *data __maybe_unused,
42		    int max_stack __maybe_unused)
 
43{
44	return 0;
45}
46
47static inline int unwind__prepare_access(struct thread *thread __maybe_unused)
 
 
48{
49	return 0;
50}
51
52static inline void unwind__flush_access(struct thread *thread __maybe_unused) {}
53static inline void unwind__finish_access(struct thread *thread __maybe_unused) {}
54#endif /* HAVE_DWARF_UNWIND_SUPPORT */
55#endif /* __UNWIND_H */