1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _PROBE_FINDER_H 3 #define _PROBE_FINDER_H 4 5 #include <stdbool.h> 6 #include "intlist.h" 7 #include "probe-event.h" 8 #include <linux/ctype.h> 9 10 #define MAX_PROBE_BUFFER 1024 11 #define MAX_PROBES 128 12 #define MAX_PROBE_ARGS 128 13 14 #define PROBE_ARG_VARS "$vars" 15 #define PROBE_ARG_PARAMS "$params" 16 17 static inline int is_c_varname(const char *name) 18 { 19 /* TODO */ 20 return isalpha(name[0]) || name[0] == '_'; 21 } 22 23 #ifdef HAVE_DWARF_SUPPORT 24 25 #include "dwarf-aux.h" 26 27 /* TODO: export debuginfo data structure even if no dwarf support */ 28 29 /* debug information structure */ 30 struct debuginfo { 31 Dwarf *dbg; 32 Dwfl_Module *mod; 33 Dwfl *dwfl; 34 Dwarf_Addr bias; 35 }; 36 37 /* This also tries to open distro debuginfo */ 38 struct debuginfo *debuginfo__new(const char *path); 39 void debuginfo__delete(struct debuginfo *dbg); 40 41 /* Find probe_trace_events specified by perf_probe_event from debuginfo */ 42 int debuginfo__find_trace_events(struct debuginfo *dbg, 43 struct perf_probe_event *pev, 44 struct probe_trace_event **tevs); 45 46 /* Find a perf_probe_point from debuginfo */ 47 int debuginfo__find_probe_point(struct debuginfo *dbg, unsigned long addr, 48 struct perf_probe_point *ppt); 49 50 int debuginfo__get_text_offset(struct debuginfo *dbg, Dwarf_Addr *offs, 51 bool adjust_offset); 52 53 /* Find a line range */ 54 int debuginfo__find_line_range(struct debuginfo *dbg, struct line_range *lr); 55 56 /* Find available variables */ 57 int debuginfo__find_available_vars_at(struct debuginfo *dbg, 58 struct perf_probe_event *pev, 59 struct variable_list **vls); 60 61 /* Find a src file from a DWARF tag path */ 62 int get_real_path(const char *raw_path, const char *comp_dir, 63 char **new_path); 64 65 struct probe_finder { 66 struct perf_probe_event *pev; /* Target probe event */ 67 68 /* Callback when a probe point is found */ 69 int (*callback)(Dwarf_Die *sc_die, struct probe_finder *pf); 70 71 /* For function searching */ 72 int lno; /* Line number */ 73 Dwarf_Addr addr; /* Address */ 74 const char *fname; /* Real file name */ 75 Dwarf_Die cu_die; /* Current CU */ 76 Dwarf_Die sp_die; 77 struct intlist *lcache; /* Line cache for lazy match */ 78 79 /* For variable searching */ 80 #if _ELFUTILS_PREREQ(0, 142) 81 /* Call Frame Information from .eh_frame */ 82 Dwarf_CFI *cfi_eh; 83 /* Call Frame Information from .debug_frame */ 84 Dwarf_CFI *cfi_dbg; 85 #endif 86 Dwarf_Op *fb_ops; /* Frame base attribute */ 87 unsigned int machine; /* Target machine arch */ 88 struct perf_probe_arg *pvar; /* Current target variable */ 89 struct probe_trace_arg *tvar; /* Current result variable */ 90 }; 91 92 struct trace_event_finder { 93 struct probe_finder pf; 94 Dwfl_Module *mod; /* For solving symbols */ 95 struct probe_trace_event *tevs; /* Found trace events */ 96 int ntevs; /* Number of trace events */ 97 int max_tevs; /* Max number of trace events */ 98 }; 99 100 struct available_var_finder { 101 struct probe_finder pf; 102 Dwfl_Module *mod; /* For solving symbols */ 103 struct variable_list *vls; /* Found variable lists */ 104 int nvls; /* Number of variable lists */ 105 int max_vls; /* Max no. of variable lists */ 106 bool child; /* Search child scopes */ 107 }; 108 109 struct line_finder { 110 struct line_range *lr; /* Target line range */ 111 112 const char *fname; /* File name */ 113 int lno_s; /* Start line number */ 114 int lno_e; /* End line number */ 115 Dwarf_Die cu_die; /* Current CU */ 116 Dwarf_Die sp_die; 117 int found; 118 }; 119 120 #endif /* HAVE_DWARF_SUPPORT */ 121 122 #endif /*_PROBE_FINDER_H */ 123