1 files changed, 122 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..16252980f
--- /dev/null
+++ b/tools/perf/util/probe-finder.h
@@ -0,0 +1,122 @@
+/* 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 "sane_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 */