diff options
Diffstat (limited to 'kernel/tools/perf/util/probe-finder.h')
-rw-r--r-- | kernel/tools/perf/util/probe-finder.h | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/kernel/tools/perf/util/probe-finder.h b/kernel/tools/perf/util/probe-finder.h new file mode 100644 index 000000000..ebf8c8c81 --- /dev/null +++ b/kernel/tools/perf/util/probe-finder.h @@ -0,0 +1,116 @@ +#ifndef _PROBE_FINDER_H +#define _PROBE_FINDER_H + +#include <stdbool.h> +#include "util.h" +#include "intlist.h" +#include "probe-event.h" + +#define MAX_PROBE_BUFFER 1024 +#define MAX_PROBES 128 +#define MAX_PROBE_ARGS 128 + +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 */ +extern struct debuginfo *debuginfo__new(const char *path); +extern void debuginfo__delete(struct debuginfo *dbg); + +/* Find probe_trace_events specified by perf_probe_event from debuginfo */ +extern int debuginfo__find_trace_events(struct debuginfo *dbg, + struct perf_probe_event *pev, + struct probe_trace_event **tevs, + int max_tevs); + +/* Find a perf_probe_point from debuginfo */ +extern int debuginfo__find_probe_point(struct debuginfo *dbg, + unsigned long addr, + struct perf_probe_point *ppt); + +/* Find a line range */ +extern int debuginfo__find_line_range(struct debuginfo *dbg, + struct line_range *lr); + +/* Find available variables */ +extern int debuginfo__find_available_vars_at(struct debuginfo *dbg, + struct perf_probe_event *pev, + struct variable_list **vls, + int max_points, bool externs); + +/* 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) + Dwarf_CFI *cfi; /* Call Frame Information */ +#endif + Dwarf_Op *fb_ops; /* Frame base attribute */ + 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 externs; /* Find external vars too */ + 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 */ |