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