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_PATH_LEN 256 9 #define MAX_PROBE_BUFFER 1024 10 #define MAX_PROBES 128 11 12 static inline int is_c_varname(const char *name) 13 { 14 /* TODO */ 15 return isalpha(name[0]) || name[0] == '_'; 16 } 17 18 #ifdef DWARF_SUPPORT 19 /* Find probe_trace_events specified by perf_probe_event from debuginfo */ 20 extern int find_probe_trace_events(int fd, struct perf_probe_event *pev, 21 struct probe_trace_event **tevs, 22 int max_tevs); 23 24 /* Find a perf_probe_point from debuginfo */ 25 extern int find_perf_probe_point(unsigned long addr, 26 struct perf_probe_point *ppt); 27 28 /* Find a line range */ 29 extern int find_line_range(int fd, struct line_range *lr); 30 31 /* Find available variables */ 32 extern int find_available_vars_at(int fd, struct perf_probe_event *pev, 33 struct variable_list **vls, int max_points, 34 bool externs); 35 36 #include <dwarf.h> 37 #include <elfutils/libdw.h> 38 #include <elfutils/libdwfl.h> 39 #include <elfutils/version.h> 40 41 struct probe_finder { 42 struct perf_probe_event *pev; /* Target probe event */ 43 44 /* Callback when a probe point is found */ 45 int (*callback)(Dwarf_Die *sp_die, struct probe_finder *pf); 46 47 /* For function searching */ 48 int lno; /* Line number */ 49 Dwarf_Addr addr; /* Address */ 50 const char *fname; /* Real file name */ 51 Dwarf_Die cu_die; /* Current CU */ 52 struct list_head lcache; /* Line cache for lazy match */ 53 54 /* For variable searching */ 55 #if _ELFUTILS_PREREQ(0, 142) 56 Dwarf_CFI *cfi; /* Call Frame Information */ 57 #endif 58 Dwarf_Op *fb_ops; /* Frame base attribute */ 59 struct perf_probe_arg *pvar; /* Current target variable */ 60 struct probe_trace_arg *tvar; /* Current result variable */ 61 }; 62 63 struct trace_event_finder { 64 struct probe_finder pf; 65 struct probe_trace_event *tevs; /* Found trace events */ 66 int ntevs; /* Number of trace events */ 67 int max_tevs; /* Max number of trace events */ 68 }; 69 70 struct available_var_finder { 71 struct probe_finder pf; 72 struct variable_list *vls; /* Found variable lists */ 73 int nvls; /* Number of variable lists */ 74 int max_vls; /* Max no. of variable lists */ 75 bool externs; /* Find external vars too */ 76 bool child; /* Search child scopes */ 77 }; 78 79 struct line_finder { 80 struct line_range *lr; /* Target line range */ 81 82 const char *fname; /* File name */ 83 int lno_s; /* Start line number */ 84 int lno_e; /* End line number */ 85 Dwarf_Die cu_die; /* Current CU */ 86 int found; 87 }; 88 89 #endif /* DWARF_SUPPORT */ 90 91 #endif /*_PROBE_FINDER_H */ 92