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 struct probe_finder { 59 struct perf_probe_event *pev; /* Target probe event */ 60 61 /* Callback when a probe point is found */ 62 int (*callback)(Dwarf_Die *sc_die, struct probe_finder *pf); 63 64 /* For function searching */ 65 int lno; /* Line number */ 66 Dwarf_Addr addr; /* Address */ 67 const char *fname; /* Real file name */ 68 Dwarf_Die cu_die; /* Current CU */ 69 Dwarf_Die sp_die; 70 struct intlist *lcache; /* Line cache for lazy match */ 71 72 /* For variable searching */ 73 #if _ELFUTILS_PREREQ(0, 142) 74 Dwarf_CFI *cfi; /* Call Frame Information */ 75 #endif 76 Dwarf_Op *fb_ops; /* Frame base attribute */ 77 struct perf_probe_arg *pvar; /* Current target variable */ 78 struct probe_trace_arg *tvar; /* Current result variable */ 79 }; 80 81 struct trace_event_finder { 82 struct probe_finder pf; 83 Dwfl_Module *mod; /* For solving symbols */ 84 struct probe_trace_event *tevs; /* Found trace events */ 85 int ntevs; /* Number of trace events */ 86 int max_tevs; /* Max number of trace events */ 87 }; 88 89 struct available_var_finder { 90 struct probe_finder pf; 91 Dwfl_Module *mod; /* For solving symbols */ 92 struct variable_list *vls; /* Found variable lists */ 93 int nvls; /* Number of variable lists */ 94 int max_vls; /* Max no. of variable lists */ 95 bool externs; /* Find external vars too */ 96 bool child; /* Search child scopes */ 97 }; 98 99 struct line_finder { 100 struct line_range *lr; /* Target line range */ 101 102 const char *fname; /* File name */ 103 int lno_s; /* Start line number */ 104 int lno_e; /* End line number */ 105 Dwarf_Die cu_die; /* Current CU */ 106 Dwarf_Die sp_die; 107 int found; 108 }; 109 110 #endif /* HAVE_DWARF_SUPPORT */ 111 112 #endif /*_PROBE_FINDER_H */ 113