LXR linux/tools/perf/util/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 */
  86