| yuezonghe | 824eb0c | 2024-06-27 02:32:26 -0700 | [diff] [blame] | 1 | #ifndef _PROBE_FINDER_H |
| 2 | #define _PROBE_FINDER_H |
| 3 | |
| 4 | #include <stdbool.h> |
| 5 | #include "util.h" |
| 6 | #include "probe-event.h" |
| 7 | |
| 8 | #define MAX_PROBE_BUFFER 1024 |
| 9 | #define MAX_PROBES 128 |
| 10 | |
| 11 | static inline int is_c_varname(const char *name) |
| 12 | { |
| 13 | /* TODO */ |
| 14 | return isalpha(name[0]) || name[0] == '_'; |
| 15 | } |
| 16 | |
| 17 | #ifdef DWARF_SUPPORT |
| 18 | |
| 19 | #include "dwarf-aux.h" |
| 20 | |
| 21 | /* TODO: export debuginfo data structure even if no dwarf support */ |
| 22 | |
| 23 | /* debug information structure */ |
| 24 | struct debuginfo { |
| 25 | Dwarf *dbg; |
| 26 | Dwfl *dwfl; |
| 27 | Dwarf_Addr bias; |
| 28 | }; |
| 29 | |
| 30 | extern struct debuginfo *debuginfo__new(const char *path); |
| 31 | extern struct debuginfo *debuginfo__new_online_kernel(unsigned long addr); |
| 32 | extern void debuginfo__delete(struct debuginfo *self); |
| 33 | |
| 34 | /* Find probe_trace_events specified by perf_probe_event from debuginfo */ |
| 35 | extern int debuginfo__find_trace_events(struct debuginfo *self, |
| 36 | struct perf_probe_event *pev, |
| 37 | struct probe_trace_event **tevs, |
| 38 | int max_tevs); |
| 39 | |
| 40 | /* Find a perf_probe_point from debuginfo */ |
| 41 | extern int debuginfo__find_probe_point(struct debuginfo *self, |
| 42 | unsigned long addr, |
| 43 | struct perf_probe_point *ppt); |
| 44 | |
| 45 | /* Find a line range */ |
| 46 | extern int debuginfo__find_line_range(struct debuginfo *self, |
| 47 | struct line_range *lr); |
| 48 | |
| 49 | /* Find available variables */ |
| 50 | extern int debuginfo__find_available_vars_at(struct debuginfo *self, |
| 51 | struct perf_probe_event *pev, |
| 52 | struct variable_list **vls, |
| 53 | int max_points, bool externs); |
| 54 | |
| 55 | struct probe_finder { |
| 56 | struct perf_probe_event *pev; /* Target probe event */ |
| 57 | |
| 58 | /* Callback when a probe point is found */ |
| 59 | int (*callback)(Dwarf_Die *sc_die, struct probe_finder *pf); |
| 60 | |
| 61 | /* For function searching */ |
| 62 | int lno; /* Line number */ |
| 63 | Dwarf_Addr addr; /* Address */ |
| 64 | const char *fname; /* Real file name */ |
| 65 | Dwarf_Die cu_die; /* Current CU */ |
| 66 | Dwarf_Die sp_die; |
| 67 | struct list_head lcache; /* Line cache for lazy match */ |
| 68 | |
| 69 | /* For variable searching */ |
| 70 | #if _ELFUTILS_PREREQ(0, 142) |
| 71 | Dwarf_CFI *cfi; /* Call Frame Information */ |
| 72 | #endif |
| 73 | Dwarf_Op *fb_ops; /* Frame base attribute */ |
| 74 | struct perf_probe_arg *pvar; /* Current target variable */ |
| 75 | struct probe_trace_arg *tvar; /* Current result variable */ |
| 76 | }; |
| 77 | |
| 78 | struct trace_event_finder { |
| 79 | struct probe_finder pf; |
| 80 | struct probe_trace_event *tevs; /* Found trace events */ |
| 81 | int ntevs; /* Number of trace events */ |
| 82 | int max_tevs; /* Max number of trace events */ |
| 83 | }; |
| 84 | |
| 85 | struct available_var_finder { |
| 86 | struct probe_finder pf; |
| 87 | struct variable_list *vls; /* Found variable lists */ |
| 88 | int nvls; /* Number of variable lists */ |
| 89 | int max_vls; /* Max no. of variable lists */ |
| 90 | bool externs; /* Find external vars too */ |
| 91 | bool child; /* Search child scopes */ |
| 92 | }; |
| 93 | |
| 94 | struct line_finder { |
| 95 | struct line_range *lr; /* Target line range */ |
| 96 | |
| 97 | const char *fname; /* File name */ |
| 98 | int lno_s; /* Start line number */ |
| 99 | int lno_e; /* End line number */ |
| 100 | Dwarf_Die cu_die; /* Current CU */ |
| 101 | Dwarf_Die sp_die; |
| 102 | int found; |
| 103 | }; |
| 104 | |
| 105 | #endif /* DWARF_SUPPORT */ |
| 106 | |
| 107 | #endif /*_PROBE_FINDER_H */ |