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 #define MAX_PROBE_ARGS 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 HAVE_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_Module *mod; 28 Dwfl *dwfl; 29 Dwarf_Addr bias; 30 }; 31 32 extern struct debuginfo *debuginfo__new(const char *path); 33 extern struct debuginfo *debuginfo__new_online_kernel(unsigned long addr); 34 extern void debuginfo__delete(struct debuginfo *dbg); 35 36 /* Find probe_trace_events specified by perf_probe_event from debuginfo */ 37 extern int debuginfo__find_trace_events(struct debuginfo *dbg, 38 struct perf_probe_event *pev, 39 struct probe_trace_event **tevs, 40 int max_tevs); 41 42 /* Find a perf_probe_point from debuginfo */ 43 extern int debuginfo__find_probe_point(struct debuginfo *dbg, 44 unsigned long addr, 45 struct perf_probe_point *ppt); 46 47 /* Find a line range */ 48 extern int debuginfo__find_line_range(struct debuginfo *dbg, 49 struct line_range *lr); 50 51 /* Find available variables */ 52 extern int debuginfo__find_available_vars_at(struct debuginfo *dbg, 53 struct perf_probe_event *pev, 54 struct variable_list **vls, 55 int max_points, bool externs); 56 57 struct probe_finder { 58 struct perf_probe_event *pev; /* Target probe event */ 59 60 /* Callback when a probe point is found */ 61 int (*callback)(Dwarf_Die *sc_die, struct probe_finder *pf); 62 63 /* For function searching */ 64 int lno; /* Line number */ 65 Dwarf_Addr addr; /* Address */ 66 const char *fname; /* Real file name */ 67 Dwarf_Die cu_die; /* Current CU */ 68 Dwarf_Die sp_die; 69 struct list_head lcache; /* Line cache for lazy match */ 70 71 /* For variable searching */ 72 #if _ELFUTILS_PREREQ(0, 142) 73 Dwarf_CFI *cfi; /* Call Frame Information */ 74 #endif 75 Dwarf_Op *fb_ops; /* Frame base attribute */ 76 struct perf_probe_arg *pvar; /* Current target variable */ 77 struct probe_trace_arg *tvar; /* Current result variable */ 78 }; 79 80 struct trace_event_finder { 81 struct probe_finder pf; 82 Dwfl_Module *mod; /* For solving symbols */ 83 struct probe_trace_event *tevs; /* Found trace events */ 84 int ntevs; /* Number of trace events */ 85 int max_tevs; /* Max number of trace events */ 86 }; 87 88 struct available_var_finder { 89 struct probe_finder pf; 90 Dwfl_Module *mod; /* For solving symbols */ 91 struct variable_list *vls; /* Found variable lists */ 92 int nvls; /* Number of variable lists */ 93 int max_vls; /* Max no. of variable lists */ 94 bool externs; /* Find external vars too */ 95 bool child; /* Search child scopes */ 96 }; 97 98 struct line_finder { 99 struct line_range *lr; /* Target line range */ 100 101 const char *fname; /* File name */ 102 int lno_s; /* Start line number */ 103 int lno_e; /* End line number */ 104 Dwarf_Die cu_die; /* Current CU */ 105 Dwarf_Die sp_die; 106 int found; 107 }; 108 109 #endif /* HAVE_DWARF_SUPPORT */ 110 111 #endif /*_PROBE_FINDER_H */ 112