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 int LIBUNWIND__ARCH_REG_ID(int regnum);
  36 int unwind__prepare_access(struct thread *thread, struct map *map);
  37 void unwind__flush_access(struct thread *thread);
  38 void unwind__finish_access(struct thread *thread);
  39 #else
  40 static inline int unwind__prepare_access(struct thread *thread __maybe_unused,
  41                                          struct map *map __maybe_unused)
  42 {
  43         return 0;
  44 }
  45
  46 static inline void unwind__flush_access(struct thread *thread __maybe_unused) {}
  47 static inline void unwind__finish_access(struct thread *thread __maybe_unused) {}
  48 #endif
  49 #else
  50 static inline int
  51 unwind__get_entries(unwind_entry_cb_t cb __maybe_unused,
  52                     void *arg __maybe_unused,
  53                     struct thread *thread __maybe_unused,
  54                     struct perf_sample *data __maybe_unused,
  55                     int max_stack __maybe_unused)
  56 {
  57         return 0;
  58 }
  59
  60 static inline int unwind__prepare_access(struct thread *thread __maybe_unused,
  61                                          struct map *map __maybe_unused)
  62 {
  63         return 0;
  64 }
  65
  66 static inline void unwind__flush_access(struct thread *thread __maybe_unused) {}
  67 static inline void unwind__finish_access(struct thread *thread __maybe_unused) {}
  68 #endif /* HAVE_DWARF_UNWIND_SUPPORT */
  69 #endif /* __UNWIND_H */