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 */

 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 perf_sample;
10struct symbol;
11struct thread;
12
13struct unwind_entry {
14	struct map	*map;
15	struct symbol	*sym;
16	u64		ip;
17};
18
19typedef int (*unwind_entry_cb_t)(struct unwind_entry *entry, void *arg);
20
21struct 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
31int 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
48int LIBUNWIND__ARCH_REG_ID(int regnum);
49int unwind__prepare_access(struct thread *thread, struct map *map,
50			   bool *initialized);
51void unwind__flush_access(struct thread *thread);
52void unwind__finish_access(struct thread *thread);
53#else
54static 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
61static inline void unwind__flush_access(struct thread *thread __maybe_unused) {}
62static inline void unwind__finish_access(struct thread *thread __maybe_unused) {}
63#endif
64#else
65static inline int
66unwind__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
75static 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
82static inline void unwind__flush_access(struct thread *thread __maybe_unused) {}
83static inline void unwind__finish_access(struct thread *thread __maybe_unused) {}
84#endif /* HAVE_DWARF_UNWIND_SUPPORT */
85#endif /* __UNWIND_H */