| rjw | 1f88458 | 2022-01-06 17:20:42 +0800 | [diff] [blame^] | 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 "sane_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 */ |