1 #ifndef _PROBE_FINDER_H 2 #define _PROBE_FINDER_H 3 4 #include <stdbool.h> 5 #include "util.h" 6 #include "intlist.h" 7 #include "probe-event.h" 8 9 #define MAX_PROBE_BUFFER 1024 10 #define MAX_PROBES 128 11 #define MAX_PROBE_ARGS 128 12 13 static inline int is_c_varname(const char *name) 14 { 15 /* TODO */ 16 return isalpha(name[0]) || name[0] == '_'; 17 } 18 19 #ifdef HAVE_DWARF_SUPPORT 20 21 #include "dwarf-aux.h" 22 23 /* TODO: export debuginfo data structure even if no dwarf support */ 24 25 /* debug information structure */ 26 struct debuginfo { 27 Dwarf *dbg; 28 Dwfl_Module *mod; 29 Dwfl *dwfl; 30 Dwarf_Addr bias; 31 }; 32 33 /* This also tries to open distro debuginfo */ 34 extern struct debuginfo *debuginfo__new(const char *path); 35 extern void debuginfo__delete(struct debuginfo *dbg); 36 37 /* Find probe_trace_events specified by perf_probe_event from debuginfo */ 38 extern int debuginfo__find_trace_events(struct debuginfo *dbg, 39 struct perf_probe_event *pev, 40 struct probe_trace_event **tevs, 41 int max_tevs); 42 43 /* Find a perf_probe_point from debuginfo */ 44 extern int debuginfo__find_probe_point(struct debuginfo *dbg, 45 unsigned long addr, 46 struct perf_probe_point *ppt); 47 48 /* Find a line range */ 49 extern int debuginfo__find_line_range(struct debuginfo *dbg, 50 struct line_range *lr); 51 52 /* Find available variables */ 53 extern int debuginfo__find_available_vars_at(struct debuginfo *dbg, 54 struct perf_probe_event *pev, 55 struct variable_list **vls, 56 int max_points, bool externs); 57 58 /* Find a src file from a DWARF tag path */ 59 int get_real_path(const char *raw_path, const char *comp_dir, 60 char **new_path); 61 62 struct probe_finder { 63 struct perf_probe_event *pev; /* Target probe event */ 64 65 /* Callback when a probe point is found */ 66 int (*callback)(Dwarf_Die *sc_die, struct probe_finder *pf); 67 68 /* For function searching */ 69 int lno; /* Line number */ 70 Dwarf_Addr addr; /* Address */ 71 const char *fname; /* Real file name */ 72 Dwarf_Die cu_die; /* Current CU */ 73 Dwarf_Die sp_die; 74 struct intlist *lcache; /* Line cache for lazy match */ 75 76 /* For variable searching */ 77 #if _ELFUTILS_PREREQ(0, 142) 78 Dwarf_CFI *cfi; /* Call Frame Information */ 79 #endif 80 Dwarf_Op *fb_ops; /* Frame base attribute */ 81 struct perf_probe_arg *pvar; /* Current target variable */ 82 struct probe_trace_arg *tvar; /* Current result variable */ 83 }; 84 85 struct trace_event_finder { 86 struct probe_finder pf; 87 Dwfl_Module *mod; /* For solving symbols */ 88 struct probe_trace_event *tevs; /* Found trace events */ 89 int ntevs; /* Number of trace events */ 90 int max_tevs; /* Max number of trace events */ 91 }; 92 93 struct available_var_finder { 94 struct probe_finder pf; 95 Dwfl_Module *mod; /* For solving symbols */ 96 struct variable_list *vls; /* Found variable lists */ 97 int nvls; /* Number of variable lists */ 98 int max_vls; /* Max no. of variable lists */ 99 bool externs; /* Find external vars too */ 100 bool child; /* Search child scopes */ 101 }; 102 103 struct line_finder { 104 struct line_range *lr; /* Target line range */ 105 106 const char *fname; /* File name */ 107 int lno_s; /* Start line number */ 108 int lno_e; /* End line number */ 109 Dwarf_Die cu_die; /* Current CU */ 110 Dwarf_Die sp_die; 111 int found; 112 }; 113 114 #endif /* HAVE_DWARF_SUPPORT */ 115 116 #endif /*_PROBE_FINDER_H */ 117