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_Module *mod; 27 Dwfl *dwfl; 28 Dwarf_Addr bias; 29 }; 30 31 extern struct debuginfo *debuginfo__new(const char *path); 32 extern struct debuginfo *debuginfo__new_online_kernel(unsigned long addr); 33 extern void debuginfo__delete(struct debuginfo *self); 34 35 /* Find probe_trace_events specified by perf_probe_event from debuginfo */ 36 extern int debuginfo__find_trace_events(struct debuginfo *self, 37 struct perf_probe_event *pev, 38 struct probe_trace_event **tevs, 39 int max_tevs); 40 41 /* Find a perf_probe_point from debuginfo */ 42 extern int debuginfo__find_probe_point(struct debuginfo *self, 43 unsigned long addr, 44 struct perf_probe_point *ppt); 45 46 /* Find a line range */ 47 extern int debuginfo__find_line_range(struct debuginfo *self, 48 struct line_range *lr); 49 50 /* Find available variables */ 51 extern int debuginfo__find_available_vars_at(struct debuginfo *self, 52 struct perf_probe_event *pev, 53 struct variable_list **vls, 54 int max_points, bool externs); 55 56 struct probe_finder { 57 struct perf_probe_event *pev; /* Target probe event */ 58 59 /* Callback when a probe point is found */ 60 int (*callback)(Dwarf_Die *sc_die, struct probe_finder *pf); 61 62 /* For function searching */ 63 int lno; /* Line number */ 64 Dwarf_Addr addr; /* Address */ 65 const char *fname; /* Real file name */ 66 Dwarf_Die cu_die; /* Current CU */ 67 Dwarf_Die sp_die; 68 struct list_head lcache; /* Line cache for lazy match */ 69 70 /* For variable searching */ 71 #if _ELFUTILS_PREREQ(0, 142) 72 Dwarf_CFI *cfi; /* Call Frame Information */ 73 #endif 74 Dwarf_Op *fb_ops; /* Frame base attribute */ 75 struct perf_probe_arg *pvar; /* Current target variable */ 76 struct probe_trace_arg *tvar; /* Current result variable */ 77 }; 78 79 struct trace_event_finder { 80 struct probe_finder pf; 81 Dwfl_Module *mod; /* For solving symbols */ 82 struct probe_trace_event *tevs; /* Found trace events */ 83 int ntevs; /* Number of trace events */ 84 int max_tevs; /* Max number of trace events */ 85 }; 86 87 struct available_var_finder { 88 struct probe_finder pf; 89 Dwfl_Module *mod; /* For solving symbols */ 90 struct variable_list *vls; /* Found variable lists */ 91 int nvls; /* Number of variable lists */ 92 int max_vls; /* Max no. of variable lists */ 93 bool externs; /* Find external vars too */ 94 bool child; /* Search child scopes */ 95 }; 96 97 struct line_finder { 98 struct line_range *lr; /* Target line range */ 99 100 const char *fname; /* File name */ 101 int lno_s; /* Start line number */ 102 int lno_e; /* End line number */ 103 Dwarf_Die cu_die; /* Current CU */ 104 Dwarf_Die sp_die; 105 int found; 106 }; 107 108 #endif /* DWARF_SUPPORT */ 109 110 #endif /*_PROBE_FINDER_H */ 111
