| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef _PROBE_FINDER_H |
| #define _PROBE_FINDER_H |
| |
| #include <stdbool.h> |
| #include "intlist.h" |
| #include "probe-event.h" |
| #include <linux/ctype.h> |
| |
| #define MAX_PROBE_BUFFER 1024 |
| #define MAX_PROBES 128 |
| #define MAX_PROBE_ARGS 128 |
| |
| #define PROBE_ARG_VARS "$vars" |
| #define PROBE_ARG_PARAMS "$params" |
| |
| static inline int is_c_varname(const char *name) |
| { |
| /* TODO */ |
| return isalpha(name[0]) || name[0] == '_'; |
| } |
| |
| #ifdef HAVE_DWARF_SUPPORT |
| |
| #include "dwarf-aux.h" |
| |
| /* TODO: export debuginfo data structure even if no dwarf support */ |
| |
| /* debug information structure */ |
| struct debuginfo { |
| Dwarf *dbg; |
| Dwfl_Module *mod; |
| Dwfl *dwfl; |
| Dwarf_Addr bias; |
| }; |
| |
| /* This also tries to open distro debuginfo */ |
| struct debuginfo *debuginfo__new(const char *path); |
| void debuginfo__delete(struct debuginfo *dbg); |
| |
| /* Find probe_trace_events specified by perf_probe_event from debuginfo */ |
| int debuginfo__find_trace_events(struct debuginfo *dbg, |
| struct perf_probe_event *pev, |
| struct probe_trace_event **tevs); |
| |
| /* Find a perf_probe_point from debuginfo */ |
| int debuginfo__find_probe_point(struct debuginfo *dbg, unsigned long addr, |
| struct perf_probe_point *ppt); |
| |
| int debuginfo__get_text_offset(struct debuginfo *dbg, Dwarf_Addr *offs, |
| bool adjust_offset); |
| |
| /* Find a line range */ |
| int debuginfo__find_line_range(struct debuginfo *dbg, struct line_range *lr); |
| |
| /* Find available variables */ |
| int debuginfo__find_available_vars_at(struct debuginfo *dbg, |
| struct perf_probe_event *pev, |
| struct variable_list **vls); |
| |
| /* Find a src file from a DWARF tag path */ |
| int get_real_path(const char *raw_path, const char *comp_dir, |
| char **new_path); |
| |
| struct probe_finder { |
| struct perf_probe_event *pev; /* Target probe event */ |
| |
| /* Callback when a probe point is found */ |
| int (*callback)(Dwarf_Die *sc_die, struct probe_finder *pf); |
| |
| /* For function searching */ |
| int lno; /* Line number */ |
| Dwarf_Addr addr; /* Address */ |
| const char *fname; /* Real file name */ |
| Dwarf_Die cu_die; /* Current CU */ |
| Dwarf_Die sp_die; |
| struct intlist *lcache; /* Line cache for lazy match */ |
| |
| /* For variable searching */ |
| #if _ELFUTILS_PREREQ(0, 142) |
| /* Call Frame Information from .eh_frame */ |
| Dwarf_CFI *cfi_eh; |
| /* Call Frame Information from .debug_frame */ |
| Dwarf_CFI *cfi_dbg; |
| #endif |
| Dwarf_Op *fb_ops; /* Frame base attribute */ |
| unsigned int machine; /* Target machine arch */ |
| struct perf_probe_arg *pvar; /* Current target variable */ |
| struct probe_trace_arg *tvar; /* Current result variable */ |
| }; |
| |
| struct trace_event_finder { |
| struct probe_finder pf; |
| Dwfl_Module *mod; /* For solving symbols */ |
| struct probe_trace_event *tevs; /* Found trace events */ |
| int ntevs; /* Number of trace events */ |
| int max_tevs; /* Max number of trace events */ |
| }; |
| |
| struct available_var_finder { |
| struct probe_finder pf; |
| Dwfl_Module *mod; /* For solving symbols */ |
| struct variable_list *vls; /* Found variable lists */ |
| int nvls; /* Number of variable lists */ |
| int max_vls; /* Max no. of variable lists */ |
| bool child; /* Search child scopes */ |
| }; |
| |
| struct line_finder { |
| struct line_range *lr; /* Target line range */ |
| |
| const char *fname; /* File name */ |
| int lno_s; /* Start line number */ |
| int lno_e; /* End line number */ |
| Dwarf_Die cu_die; /* Current CU */ |
| Dwarf_Die sp_die; |
| int found; |
| }; |
| |
| #endif /* HAVE_DWARF_SUPPORT */ |
| |
| #endif /*_PROBE_FINDER_H */ |