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