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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /tools/perf/util/probe-finder.h | |
parent | Initial commit. (diff) | |
download | linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.tar.xz linux-5d1646d90e1f2cceb9f0828f4b28318cd0ec7744.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/perf/util/probe-finder.h')
-rw-r--r-- | tools/perf/util/probe-finder.h | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/tools/perf/util/probe-finder.h b/tools/perf/util/probe-finder.h new file mode 100644 index 000000000..2febb5875 --- /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 <stdbool.h> +#include "intlist.h" +#include "build-id.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; + 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, 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 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 */ |