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 "build-id.h" 8 #include "probe-event.h" 9 #include <linux/ctype.h> 10 11 #define MAX_PROBE_BUFFER 1024 12 #define MAX_PROBES 128 13 #define MAX_PROBE_ARGS 128 14 15 #define PROBE_ARG_VARS "$vars" 16 #define PROBE_ARG_PARAMS "$params" 17 18 static inline int is_c_varname(const char *name) 19 { 20 /* TODO */ 21 return isalpha(name[0]) || name[0] == '_'; 22 } 23 24 #ifdef HAVE_LIBDW_SUPPORT 25 26 #include "dwarf-aux.h" 27 #include "debuginfo.h" 28 29 /* Find probe_trace_events specified by perf_probe_event from debuginfo */ 30 int debuginfo__find_trace_events(struct debuginfo *dbg, 31 struct perf_probe_event *pev, 32 struct probe_trace_event **tevs); 33 34 /* Find a perf_probe_point from debuginfo */ 35 int debuginfo__find_probe_point(struct debuginfo *dbg, u64 addr, 36 struct perf_probe_point *ppt); 37 38 /* Find a line range */ 39 int debuginfo__find_line_range(struct debuginfo *dbg, struct line_range *lr); 40 41 /* Find available variables */ 42 int debuginfo__find_available_vars_at(struct debuginfo *dbg, 43 struct perf_probe_event *pev, 44 struct variable_list **vls); 45 46 /* Find a src file from a DWARF tag path */ 47 int find_source_path(const char *raw_path, const char *sbuild_id, 48 const char *comp_dir, char **new_path); 49 50 struct probe_finder { 51 struct perf_probe_event *pev; /* Target probe event */ 52 struct debuginfo *dbg; 53 54 /* Callback when a probe point is found */ 55 int (*callback)(Dwarf_Die *sc_die, struct probe_finder *pf); 56 57 /* For function searching */ 58 int lno; /* Line number */ 59 Dwarf_Addr addr; /* Address */ 60 const char *fname; /* Real file name */ 61 Dwarf_Die cu_die; /* Current CU */ 62 Dwarf_Die sp_die; 63 struct intlist *lcache; /* Line cache for lazy match */ 64 65 /* For variable searching */ 66 /* Call Frame Information from .eh_frame. Owned by this struct. */ 67 Dwarf_CFI *cfi_eh; 68 /* Call Frame Information from .debug_frame. Not owned. */ 69 Dwarf_CFI *cfi_dbg; 70 Dwarf_Op *fb_ops; /* Frame base attribute */ 71 unsigned int e_machine; /* ELF target machine arch */ 72 unsigned int e_flags; /* ELF target machine flags */ 73 struct perf_probe_arg *pvar; /* Current target variable */ 74 struct probe_trace_arg *tvar; /* Current result variable */ 75 bool skip_empty_arg; /* Skip non-exist args */ 76 }; 77 78 struct trace_event_finder { 79 struct probe_finder pf; 80 Dwfl_Module *mod; /* For solving symbols */ 81 struct probe_trace_event *tevs; /* Found trace events */ 82 int ntevs; /* Number of trace events */ 83 int max_tevs; /* Max number of trace events */ 84 }; 85 86 struct available_var_finder { 87 struct probe_finder pf; 88 Dwfl_Module *mod; /* For solving symbols */ 89 struct variable_list *vls; /* Found variable lists */ 90 int nvls; /* Number of variable lists */ 91 int max_vls; /* Max no. of variable lists */ 92 bool child; /* Search child scopes */ 93 }; 94 95 struct line_finder { 96 struct line_range *lr; /* Target line range */ 97 98 const char *fname; /* File name */ 99 int lno_s; /* Start line number */ 100 int lno_e; /* End line number */ 101 Dwarf_Die cu_die; /* Current CU */ 102 Dwarf_Die sp_die; 103 int found; 104 }; 105 106 #endif /* HAVE_LIBDW_SUPPORT */ 107 108 #endif /*_PROBE_FINDER_H */ 109