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_PATH_LEN 256 9 #define MAX_PROBE_BUFFER 1024 10 #define MAX_PROBES 128 11 12 static inline int is_c_varname(const char *name) 13 { 14 /* TODO */ 15 return isalpha(name[0]) || name[0] == '_'; 16 } 17 18 #ifdef DWARF_SUPPORT 19 20 #include "dwarf-aux.h" 21 22 /* TODO: export debuginfo data structure even if no dwarf support */ 23 24 /* debug information structure */ 25 struct debuginfo { 26 Dwarf *dbg; 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 struct probe_trace_event *tevs; /* Found trace events */ 82 int ntevs; /* Number of trace events */ 83 int max_tevs; /* Max number of trace events */ 84 }; 85 86 struct available_var_finder { 87 struct probe_finder pf; 88 struct variable_list *vls; /* Found variable lists */ 89 int nvls; /* Number of variable lists */ 90 int max_vls; /* Max no. of variable lists */ 91 bool externs; /* Find external vars too */ 92 bool child; /* Search child scopes */ 93 }; 94 95 struct line_finder { 96 struct line_range *lr; /* Target line range */ 97 98 const char *fname; /* File name */ 99 int lno_s; /* Start line number */ 100 int lno_e; /* End line number */ 101 Dwarf_Die cu_die; /* Current CU */ 102 Dwarf_Die sp_die; 103 int found; 104 }; 105 106 #endif /* DWARF_SUPPORT */ 107 108 #endif /*_PROBE_FINDER_H */ 109