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 */ 108