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 /* Call Frame Information from .eh_frame */ 80 Dwarf_CFI *cfi_eh; 81 /* Call Frame Information from .debug_frame */ 82 Dwarf_CFI *cfi_dbg; 83 #endif 84 Dwarf_Op *fb_ops; /* Frame base attribute */ 85 struct perf_probe_arg *pvar; /* Current target variable */ 86 struct probe_trace_arg *tvar; /* Current result variable */ 87 }; 88 89 struct trace_event_finder { 90 struct probe_finder pf; 91 Dwfl_Module *mod; /* For solving symbols */ 92 struct probe_trace_event *tevs; /* Found trace events */ 93 int ntevs; /* Number of trace events */ 94 int max_tevs; /* Max number of trace events */ 95 }; 96 97 struct available_var_finder { 98 struct probe_finder pf; 99 Dwfl_Module *mod; /* For solving symbols */ 100 struct variable_list *vls; /* Found variable lists */ 101 int nvls; /* Number of variable lists */ 102 int max_vls; /* Max no. of variable lists */ 103 bool child; /* Search child scopes */ 104 }; 105 106 struct line_finder { 107 struct line_range *lr; /* Target line range */ 108 109 const char *fname; /* File name */ 110 int lno_s; /* Start line number */ 111 int lno_e; /* End line number */ 112 Dwarf_Die cu_die; /* Current CU */ 113 Dwarf_Die sp_die; 114 int found; 115 }; 116 117 #endif /* HAVE_DWARF_SUPPORT */ 118 119 #endif /*_PROBE_FINDER_H */ 120