1 #ifndef _PROBE_FINDER_H 2 #define _PROBE_FINDER_H 3 4 #include <stdbool.h> 5 #include "intlist.h" 6 #include "probe-event.h" 7 #include "sane_ctype.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 struct debuginfo *debuginfo__new(const char *path); 38 void debuginfo__delete(struct debuginfo *dbg); 39 40 /* Find probe_trace_events specified by perf_probe_event from debuginfo */ 41 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 int debuginfo__find_probe_point(struct debuginfo *dbg, unsigned long addr, 47 struct perf_probe_point *ppt); 48 49 int debuginfo__get_text_offset(struct debuginfo *dbg, Dwarf_Addr *offs, 50 bool adjust_offset); 51 52 /* Find a line range */ 53 int debuginfo__find_line_range(struct debuginfo *dbg, struct line_range *lr); 54 55 /* Find available variables */ 56 int debuginfo__find_available_vars_at(struct debuginfo *dbg, 57 struct perf_probe_event *pev, 58 struct variable_list **vls); 59 60 /* Find a src file from a DWARF tag path */ 61 int get_real_path(const char *raw_path, const char *comp_dir, 62 char **new_path); 63 64 struct probe_finder { 65 struct perf_probe_event *pev; /* Target probe event */ 66 67 /* Callback when a probe point is found */ 68 int (*callback)(Dwarf_Die *sc_die, struct probe_finder *pf); 69 70 /* For function searching */ 71 int lno; /* Line number */ 72 Dwarf_Addr addr; /* Address */ 73 const char *fname; /* Real file name */ 74 Dwarf_Die cu_die; /* Current CU */ 75 Dwarf_Die sp_die; 76 struct intlist *lcache; /* Line cache for lazy match */ 77 78 /* For variable searching */ 79 #if _ELFUTILS_PREREQ(0, 142) 80 /* Call Frame Information from .eh_frame */ 81 Dwarf_CFI *cfi_eh; 82 /* Call Frame Information from .debug_frame */ 83 Dwarf_CFI *cfi_dbg; 84 #endif 85 Dwarf_Op *fb_ops; /* Frame base attribute */ 86 unsigned int machine; /* Target machine arch */ 87 struct perf_probe_arg *pvar; /* Current target variable */ 88 struct probe_trace_arg *tvar; /* Current result variable */ 89 }; 90 91 struct trace_event_finder { 92 struct probe_finder pf; 93 Dwfl_Module *mod; /* For solving symbols */ 94 struct probe_trace_event *tevs; /* Found trace events */ 95 int ntevs; /* Number of trace events */ 96 int max_tevs; /* Max number of trace events */ 97 }; 98 99 struct available_var_finder { 100 struct probe_finder pf; 101 Dwfl_Module *mod; /* For solving symbols */ 102 struct variable_list *vls; /* Found variable lists */ 103 int nvls; /* Number of variable lists */ 104 int max_vls; /* Max no. of variable lists */ 105 bool child; /* Search child scopes */ 106 }; 107 108 struct line_finder { 109 struct line_range *lr; /* Target line range */ 110 111 const char *fname; /* File name */ 112 int lno_s; /* Start line number */ 113 int lno_e; /* End line number */ 114 Dwarf_Die cu_die; /* Current CU */ 115 Dwarf_Die sp_die; 116 int found; 117 }; 118 119 #endif /* HAVE_DWARF_SUPPORT */ 120 121 #endif /*_PROBE_FINDER_H */ 122