tools/perf/util/unwind.h

   1 #ifndef __UNWIND_H
   2 #define __UNWIND_H
   3
   4 #include <linux/compiler.h>
   5 #include <linux/types.h>
   6
   7 struct map;
   8 struct perf_sample;
   9 struct symbol;
  10 struct thread;
  11
  12 struct unwind_entry {
  13         struct map      *map;
  14         struct symbol   *sym;
  15         u64             ip;
  16 };
  17
  18 typedef int (*unwind_entry_cb_t)(struct unwind_entry *entry, void *arg);
  19
  20 struct unwind_libunwind_ops {
  21         int (*prepare_access)(struct thread *thread);
  22         void (*flush_access)(struct thread *thread);
  23         void (*finish_access)(struct thread *thread);
  24         int (*get_entries)(unwind_entry_cb_t cb, void *arg,
  25                            struct thread *thread,
  26                            struct perf_sample *data, int max_stack);
  27 };
  28
  29 #ifdef HAVE_DWARF_UNWIND_SUPPORT
  30 int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
  31                         struct thread *thread,
  32                         struct perf_sample *data, int max_stack);
  33 /* libunwind specific */
  34 #ifdef HAVE_LIBUNWIND_SUPPORT
  35 #ifndef LIBUNWIND__ARCH_REG_ID
  36 #define LIBUNWIND__ARCH_REG_ID(regnum) libunwind__arch_reg_id(regnum)
  37 #endif
  38
  39 #ifndef LIBUNWIND__ARCH_REG_SP
  40 #define LIBUNWIND__ARCH_REG_SP PERF_REG_SP
  41 #endif
  42
  43 #ifndef LIBUNWIND__ARCH_REG_IP
  44 #define LIBUNWIND__ARCH_REG_IP PERF_REG_IP
  45 #endif
  46
  47 int LIBUNWIND__ARCH_REG_ID(int regnum);
  48 int unwind__prepare_access(struct thread *thread, struct map *map,
  49                            bool *initialized);
  50 void unwind__flush_access(struct thread *thread);
  51 void unwind__finish_access(struct thread *thread);
  52 #else
  53 static inline int unwind__prepare_access(struct thread *thread __maybe_unused,
  54                                          struct map *map __maybe_unused,
  55                                          bool *initialized __maybe_unused)
  56 {
  57         return 0;
  58 }
  59
  60 static inline void unwind__flush_access(struct thread *thread __maybe_unused) {}
  61 static inline void unwind__finish_access(struct thread *thread __maybe_unused) {}
  62 #endif
  63 #else
  64 static inline int
  65 unwind__get_entries(unwind_entry_cb_t cb __maybe_unused,
  66                     void *arg __maybe_unused,
  67                     struct thread *thread __maybe_unused,
  68                     struct perf_sample *data __maybe_unused,
  69                     int max_stack __maybe_unused)
  70 {
  71         return 0;
  72 }
  73
  74 static inline int unwind__prepare_access(struct thread *thread __maybe_unused,
  75                                          struct map *map __maybe_unused,
  76                                          bool *initialized __maybe_unused)
  77 {
  78         return 0;
  79 }
  80
  81 static inline void unwind__flush_access(struct thread *thread __maybe_unused) {}
  82 static inline void unwind__finish_access(struct thread *thread __maybe_unused) {}
  83 #endif /* HAVE_DWARF_UNWIND_SUPPORT */
  84 #endif /* __UNWIND_H */