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