From ace9429bb58fd418f0c81d4c2835699bddf6bde6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:27:49 +0200 Subject: Adding upstream version 6.6.15. Signed-off-by: Daniel Baumann --- tools/perf/util/probe-finder.h | 126 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 126 insertions(+) create mode 100644 tools/perf/util/probe-finder.h (limited to 'tools/perf/util/probe-finder.h') diff --git a/tools/perf/util/probe-finder.h b/tools/perf/util/probe-finder.h new file mode 100644 index 0000000000..8bc1c80d3c --- /dev/null +++ b/tools/perf/util/probe-finder.h @@ -0,0 +1,126 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _PROBE_FINDER_H +#define _PROBE_FINDER_H + +#include +#include "intlist.h" +#include "build-id.h" +#include "probe-event.h" +#include + +#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; + const unsigned char *build_id; +}; + +/* 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, u64 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 find_source_path(const char *raw_path, const char *sbuild_id, + const char *comp_dir, char **new_path); + +struct probe_finder { + struct perf_probe_event *pev; /* Target probe event */ + struct debuginfo *dbg; + + /* 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 */ + bool skip_empty_arg; /* Skip non-exist args */ +}; + +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 */ -- cgit v1.2.3