Merge branch 'perf/core' of... (bdc2209f) · Commits · EulixOS / Software / Kernel

tools/perf/builtin-probe.c

+11 −3

Original line number	Diff line number	Diff line
		@@ -134,10 +134,18 @@ static int opt_show_lines(const struct option *opt __used,
		{
		int ret = 0;

		if (str)
		if (!str)
		return 0;

		if (params.show_lines) {
		pr_warning("Warning: more than one --line options are"
		" detected. Only the first one is valid.\n");
		return 0;
		}

		params.show_lines = true;
		ret = parse_line_range_desc(str, &params.line_range);
		INIT_LIST_HEAD(&params.line_range.line_list);
		params.show_lines = true;

		return ret;
		}

tools/perf/util/dwarf-aux.c

+195 −15

Original line number	Diff line number	Diff line
		@@ -96,6 +96,39 @@ int cu_find_lineinfo(Dwarf_Die *cu_die, unsigned long addr,
		return *lineno ?: -ENOENT;
		}

		static int __die_find_inline_cb(Dwarf_Die die_mem, void data);

		/**
		* cu_walk_functions_at - Walk on function DIEs at given address
		* @cu_die: A CU DIE
		* @addr: An address
		* @callback: A callback which called with found DIEs
		* @data: A user data
		*
		* Walk on function DIEs at given @addr in @cu_die. Passed DIEs
		* should be subprogram or inlined-subroutines.
		*/
		int cu_walk_functions_at(Dwarf_Die *cu_die, Dwarf_Addr addr,
		int (callback)(Dwarf_Die , void ), void data)
		{
		Dwarf_Die die_mem;
		Dwarf_Die *sc_die;
		int ret = -ENOENT;

		/* Inlined function could be recursive. Trace it until fail */
		for (sc_die = die_find_realfunc(cu_die, addr, &die_mem);
		sc_die != NULL;
		sc_die = die_find_child(sc_die, __die_find_inline_cb, &addr,
		&die_mem)) {
		ret = callback(sc_die, data);
		if (ret)
		break;
		}

		return ret;

		}

		/**
		* die_compare_name - Compare diename and tname
		* @dw_die: a DIE
		@@ -198,6 +231,19 @@ static int die_get_attr_udata(Dwarf_Die *tp_die, unsigned int attr_name,
		return 0;
		}

		/* Get attribute and translate it as a sdata */
		static int die_get_attr_sdata(Dwarf_Die *tp_die, unsigned int attr_name,
		Dwarf_Sword *result)
		{
		Dwarf_Attribute attr;

		if (dwarf_attr(tp_die, attr_name, &attr) == NULL \|\|
		dwarf_formsdata(&attr, result) != 0)
		return -ENOENT;

		return 0;
		}

		/**
		* die_is_signed_type - Check whether a type DIE is signed or not
		* @tp_die: a DIE of a type
		@@ -250,6 +296,50 @@ int die_get_data_member_location(Dwarf_Die mb_die, Dwarf_Word offs)
		return 0;
		}

		/* Get the call file index number in CU DIE */
		static int die_get_call_fileno(Dwarf_Die *in_die)
		{
		Dwarf_Sword idx;

		if (die_get_attr_sdata(in_die, DW_AT_call_file, &idx) == 0)
		return (int)idx;
		else
		return -ENOENT;
		}

		/* Get the declared file index number in CU DIE */
		static int die_get_decl_fileno(Dwarf_Die *pdie)
		{
		Dwarf_Sword idx;

		if (die_get_attr_sdata(pdie, DW_AT_decl_file, &idx) == 0)
		return (int)idx;
		else
		return -ENOENT;
		}

		/**
		* die_get_call_file - Get callsite file name of inlined function instance
		* @in_die: a DIE of an inlined function instance
		*
		* Get call-site file name of @in_die. This means from which file the inline
		* function is called.
		*/
		const char die_get_call_file(Dwarf_Die in_die)
		{
		Dwarf_Die cu_die;
		Dwarf_Files *files;
		int idx;

		idx = die_get_call_fileno(in_die);
		if (idx < 0 \|\| !dwarf_diecu(in_die, &cu_die, NULL, NULL) \|\|
		dwarf_getsrcfiles(&cu_die, &files, NULL) != 0)
		return NULL;

		return dwarf_filesrc(files, idx, NULL, NULL);
		}


		/**
		* die_find_child - Generic DIE search function in DIE tree
		* @rt_die: a root DIE
		@@ -374,9 +464,78 @@ Dwarf_Die die_find_inlinefunc(Dwarf_Die sp_die, Dwarf_Addr addr,
		return die_mem;
		}

		struct __instance_walk_param {
		void *addr;
		int (callback)(Dwarf_Die , void *);
		void *data;
		int retval;
		};

		static int __die_walk_instances_cb(Dwarf_Die inst, void data)
		{
		struct __instance_walk_param *iwp = data;
		Dwarf_Attribute attr_mem;
		Dwarf_Die origin_mem;
		Dwarf_Attribute *attr;
		Dwarf_Die *origin;
		int tmp;

		attr = dwarf_attr(inst, DW_AT_abstract_origin, &attr_mem);
		if (attr == NULL)
		return DIE_FIND_CB_CONTINUE;

		origin = dwarf_formref_die(attr, &origin_mem);
		if (origin == NULL \|\| origin->addr != iwp->addr)
		return DIE_FIND_CB_CONTINUE;

		/* Ignore redundant instances */
		if (dwarf_tag(inst) == DW_TAG_inlined_subroutine) {
		dwarf_decl_line(origin, &tmp);
		if (die_get_call_lineno(inst) == tmp) {
		tmp = die_get_decl_fileno(origin);
		if (die_get_call_fileno(inst) == tmp)
		return DIE_FIND_CB_CONTINUE;
		}
		}

		iwp->retval = iwp->callback(inst, iwp->data);

		return (iwp->retval) ? DIE_FIND_CB_END : DIE_FIND_CB_CONTINUE;
		}

		/**
		* die_walk_instances - Walk on instances of given DIE
		* @or_die: an abstract original DIE
		* @callback: a callback function which is called with instance DIE
		* @data: user data
		*
		* Walk on the instances of give @in_die. @in_die must be an inlined function
		* declartion. This returns the return value of @callback if it returns
		* non-zero value, or -ENOENT if there is no instance.
		*/
		int die_walk_instances(Dwarf_Die or_die, int (callback)(Dwarf_Die , void ),
		void *data)
		{
		Dwarf_Die cu_die;
		Dwarf_Die die_mem;
		struct __instance_walk_param iwp = {
		.addr = or_die->addr,
		.callback = callback,
		.data = data,
		.retval = -ENOENT,
		};

		if (dwarf_diecu(or_die, &cu_die, NULL, NULL) == NULL)
		return -ENOENT;

		die_find_child(&cu_die, __die_walk_instances_cb, &iwp, &die_mem);

		return iwp.retval;
		}

		/* Line walker internal parameters */
		struct __line_walk_param {
		const char *fname;
		bool recursive;
		line_walk_callback_t callback;
		void *data;
		int retval;
		@@ -385,39 +544,56 @@ struct __line_walk_param {
		static int __die_walk_funclines_cb(Dwarf_Die in_die, void data)
		{
		struct __line_walk_param *lw = data;
		Dwarf_Addr addr;
		Dwarf_Addr addr = 0;
		const char *fname;
		int lineno;

		if (dwarf_tag(in_die) == DW_TAG_inlined_subroutine) {
		fname = die_get_call_file(in_die);
		lineno = die_get_call_lineno(in_die);
		if (lineno > 0 && dwarf_entrypc(in_die, &addr) == 0) {
		lw->retval = lw->callback(lw->fname, lineno, addr,
		lw->data);
		if (fname && lineno > 0 && dwarf_entrypc(in_die, &addr) == 0) {
		lw->retval = lw->callback(fname, lineno, addr, lw->data);
		if (lw->retval != 0)
		return DIE_FIND_CB_END;
		}
		}
		if (!lw->recursive)
		/* Don't need to search recursively */
		return DIE_FIND_CB_SIBLING;

		if (addr) {
		fname = dwarf_decl_file(in_die);
		if (fname && dwarf_decl_line(in_die, &lineno) == 0) {
		lw->retval = lw->callback(fname, lineno, addr, lw->data);
		if (lw->retval != 0)
		return DIE_FIND_CB_END;
		}
		}

		/* Continue to search nested inlined function call-sites */
		return DIE_FIND_CB_CONTINUE;
		}

		/* Walk on lines of blocks included in given DIE */
		static int __die_walk_funclines(Dwarf_Die *sp_die,
		static int __die_walk_funclines(Dwarf_Die *sp_die, bool recursive,
		line_walk_callback_t callback, void *data)
		{
		struct __line_walk_param lw = {
		.recursive = recursive,
		.callback = callback,
		.data = data,
		.retval = 0,
		};
		Dwarf_Die die_mem;
		Dwarf_Addr addr;
		const char *fname;
		int lineno;

		/* Handle function declaration line */
		lw.fname = dwarf_decl_file(sp_die);
		if (lw.fname && dwarf_decl_line(sp_die, &lineno) == 0 &&
		fname = dwarf_decl_file(sp_die);
		if (fname && dwarf_decl_line(sp_die, &lineno) == 0 &&
		dwarf_entrypc(sp_die, &addr) == 0) {
		lw.retval = callback(lw.fname, lineno, addr, data);
		lw.retval = callback(fname, lineno, addr, data);
		if (lw.retval != 0)
		goto done;
		}
		@@ -430,7 +606,7 @@ static int __die_walk_culines_cb(Dwarf_Die sp_die, void data)
		{
		struct __line_walk_param *lw = data;

		lw->retval = __die_walk_funclines(sp_die, lw->callback, lw->data);
		lw->retval = __die_walk_funclines(sp_die, true, lw->callback, lw->data);
		if (lw->retval != 0)
		return DWARF_CB_ABORT;

		@@ -439,7 +615,7 @@ static int __die_walk_culines_cb(Dwarf_Die sp_die, void data)

		/**
		* die_walk_lines - Walk on lines inside given DIE
		* @rt_die: a root DIE (CU or subprogram)
		* @rt_die: a root DIE (CU, subprogram or inlined_subroutine)
		* @callback: callback routine
		* @data: user data
		*
		@@ -460,12 +636,12 @@ int die_walk_lines(Dwarf_Die rt_die, line_walk_callback_t callback, void data)
		size_t nlines, i;

		/* Get the CU die */
		if (dwarf_tag(rt_die) == DW_TAG_subprogram)
		if (dwarf_tag(rt_die) != DW_TAG_compile_unit)
		cu_die = dwarf_diecu(rt_die, &die_mem, NULL, NULL);
		else
		cu_die = rt_die;
		if (!cu_die) {
		pr_debug2("Failed to get CU from subprogram\n");
		pr_debug2("Failed to get CU from given DIE.\n");
		return -EINVAL;
		}

		@@ -509,7 +685,11 @@ int die_walk_lines(Dwarf_Die rt_die, line_walk_callback_t callback, void data)
		* subroutines. We have to check functions list or given function.
		*/
		if (rt_die != cu_die)
		ret = __die_walk_funclines(rt_die, callback, data);
		/*
		* Don't need walk functions recursively, because nested
		* inlined functions don't have lines of the specified DIE.
		*/
		ret = __die_walk_funclines(rt_die, false, callback, data);
		else {
		struct __line_walk_param param = {
		.callback = callback,

tools/perf/util/dwarf-aux.h

+11 −0

Original line number	Diff line number	Diff line
		@@ -34,12 +34,19 @@ extern const char cu_get_comp_dir(Dwarf_Die cu_die);
		extern int cu_find_lineinfo(Dwarf_Die *cudie, unsigned long addr,
		const char *fname, int lineno);

		/* Walk on funcitons at given address */
		extern int cu_walk_functions_at(Dwarf_Die *cu_die, Dwarf_Addr addr,
		int (callback)(Dwarf_Die , void ), void data);

		/* Compare diename and tname */
		extern bool die_compare_name(Dwarf_Die dw_die, const char tname);

		/* Get callsite line number of inline-function instance */
		extern int die_get_call_lineno(Dwarf_Die *in_die);

		/* Get callsite file name of inlined function instance */
		extern const char die_get_call_file(Dwarf_Die in_die);

		/* Get type die */
		extern Dwarf_Die die_get_type(Dwarf_Die vr_die, Dwarf_Die *die_mem);

		@@ -73,6 +80,10 @@ extern Dwarf_Die die_find_realfunc(Dwarf_Die cu_die, Dwarf_Addr addr,
		extern Dwarf_Die die_find_inlinefunc(Dwarf_Die sp_die, Dwarf_Addr addr,
		Dwarf_Die *die_mem);

		/* Walk on the instances of given DIE */
		extern int die_walk_instances(Dwarf_Die *in_die,
		int (callback)(Dwarf_Die , void ), void data);

		/* Walker on lines (Note: line number will not be sorted) */
		typedef int (* line_walk_callback_t) (const char *fname, int lineno,
		Dwarf_Addr addr, void *data);

tools/perf/util/header.c

+10 −1

Original line number	Diff line number	Diff line
		@@ -726,7 +726,16 @@ static int perf_header__read_build_ids_abi_quirk(struct perf_header *header,
		return -1;

		bev.header = old_bev.header;
		bev.pid = 0;

		/*
		* As the pid is the missing value, we need to fill
		* it properly. The header.misc value give us nice hint.
		*/
		bev.pid = HOST_KERNEL_ID;
		if (bev.header.misc == PERF_RECORD_MISC_GUEST_USER \|\|
		bev.header.misc == PERF_RECORD_MISC_GUEST_KERNEL)
		bev.pid = DEFAULT_GUEST_KERNEL_ID;

		memcpy(bev.build_id, old_bev.build_id, sizeof(bev.build_id));
		__event_process_build_id(&bev, filename, session);

tools/perf/util/probe-finder.c

+142 −89

Original line number	Diff line number	Diff line
		@@ -612,12 +612,12 @@ static int convert_variable(Dwarf_Die vr_die, struct probe_finder pf)
		return ret;
		}

		/* Find a variable in a subprogram die */
		static int find_variable(Dwarf_Die sp_die, struct probe_finder pf)
		/* Find a variable in a scope DIE */
		static int find_variable(Dwarf_Die sc_die, struct probe_finder pf)
		{
		Dwarf_Die vr_die, *scopes;
		Dwarf_Die vr_die;
		char buf[32], *ptr;
		int ret, nscopes;
		int ret = 0;

		if (!is_c_varname(pf->pvar->var)) {
		/* Copy raw parameters */
		@@ -652,30 +652,16 @@ static int find_variable(Dwarf_Die sp_die, struct probe_finder pf)
		if (pf->tvar->name == NULL)
		return -ENOMEM;

		pr_debug("Searching '%s' variable in context.\n",
		pf->pvar->var);
		pr_debug("Searching '%s' variable in context.\n", pf->pvar->var);
		/* Search child die for local variables and parameters. */
		if (die_find_variable_at(sp_die, pf->pvar->var, pf->addr, &vr_die))
		ret = convert_variable(&vr_die, pf);
		else {
		/* Search upper class */
		nscopes = dwarf_getscopes_die(sp_die, &scopes);
		while (nscopes-- > 1) {
		pr_debug("Searching variables in %s\n",
		dwarf_diename(&scopes[nscopes]));
		/* We should check this scope, so give dummy address */
		if (die_find_variable_at(&scopes[nscopes],
		pf->pvar->var, 0,
		&vr_die)) {
		ret = convert_variable(&vr_die, pf);
		goto found;
		}
		}
		if (scopes)
		free(scopes);
		if (!die_find_variable_at(sc_die, pf->pvar->var, pf->addr, &vr_die)) {
		/* Search again in global variables */
		if (!die_find_variable_at(&pf->cu_die, pf->pvar->var, 0, &vr_die))
		ret = -ENOENT;
		}
		found:
		if (ret == 0)
		ret = convert_variable(&vr_die, pf);

		if (ret < 0)
		pr_warning("Failed to find '%s' in this function.\n",
		pf->pvar->var);
		@@ -718,26 +704,30 @@ static int convert_to_trace_point(Dwarf_Die *sp_die, Dwarf_Addr paddr,
		return 0;
		}

		/* Call probe_finder callback with real subprogram DIE */
		static int call_probe_finder(Dwarf_Die sp_die, struct probe_finder pf)
		/* Call probe_finder callback with scope DIE */
		static int call_probe_finder(Dwarf_Die sc_die, struct probe_finder pf)
		{
		Dwarf_Die die_mem;
		Dwarf_Attribute fb_attr;
		size_t nops;
		int ret;

		/* If no real subprogram, find a real one */
		if (!sp_die \|\| dwarf_tag(sp_die) != DW_TAG_subprogram) {
		sp_die = die_find_realfunc(&pf->cu_die, pf->addr, &die_mem);
		if (!sp_die) {
		if (!sc_die) {
		pr_err("Caller must pass a scope DIE. Program error.\n");
		return -EINVAL;
		}

		/* If not a real subprogram, find a real one */
		if (dwarf_tag(sc_die) != DW_TAG_subprogram) {
		if (!die_find_realfunc(&pf->cu_die, pf->addr, &pf->sp_die)) {
		pr_warning("Failed to find probe point in any "
		"functions.\n");
		return -ENOENT;
		}
		}
		} else
		memcpy(&pf->sp_die, sc_die, sizeof(Dwarf_Die));

		/* Get the frame base attribute/ops */
		dwarf_attr(sp_die, DW_AT_frame_base, &fb_attr);
		/* Get the frame base attribute/ops from subprogram */
		dwarf_attr(&pf->sp_die, DW_AT_frame_base, &fb_attr);
		ret = dwarf_getlocation_addr(&fb_attr, pf->addr, &pf->fb_ops, &nops, 1);
		if (ret <= 0 \|\| nops == 0) {
		pf->fb_ops = NULL;
		@@ -755,7 +745,7 @@ static int call_probe_finder(Dwarf_Die sp_die, struct probe_finder pf)
		}

		/* Call finder's callback handler */
		ret = pf->callback(sp_die, pf);
		ret = pf->callback(sc_die, pf);

		/* pf->fb_ops will be cached in libdw. Don't free it. /
		pf->fb_ops = NULL;
		@@ -763,17 +753,82 @@ static int call_probe_finder(Dwarf_Die sp_die, struct probe_finder pf)
		return ret;
		}

		struct find_scope_param {
		const char *function;
		const char *file;
		int line;
		int diff;
		Dwarf_Die *die_mem;
		bool found;
		};

		static int find_best_scope_cb(Dwarf_Die fn_die, void data)
		{
		struct find_scope_param *fsp = data;
		const char *file;
		int lno;

		/* Skip if declared file name does not match */
		if (fsp->file) {
		file = dwarf_decl_file(fn_die);
		if (!file \|\| strcmp(fsp->file, file) != 0)
		return 0;
		}
		/* If the function name is given, that's what user expects */
		if (fsp->function) {
		if (die_compare_name(fn_die, fsp->function)) {
		memcpy(fsp->die_mem, fn_die, sizeof(Dwarf_Die));
		fsp->found = true;
		return 1;
		}
		} else {
		/* With the line number, find the nearest declared DIE */
		dwarf_decl_line(fn_die, &lno);
		if (lno < fsp->line && fsp->diff > fsp->line - lno) {
		/* Keep a candidate and continue */
		fsp->diff = fsp->line - lno;
		memcpy(fsp->die_mem, fn_die, sizeof(Dwarf_Die));
		fsp->found = true;
		}
		}
		return 0;
		}

		/* Find an appropriate scope fits to given conditions */
		static Dwarf_Die find_best_scope(struct probe_finder pf, Dwarf_Die *die_mem)
		{
		struct find_scope_param fsp = {
		.function = pf->pev->point.function,
		.file = pf->fname,
		.line = pf->lno,
		.diff = INT_MAX,
		.die_mem = die_mem,
		.found = false,
		};

		cu_walk_functions_at(&pf->cu_die, pf->addr, find_best_scope_cb, &fsp);

		return fsp.found ? die_mem : NULL;
		}

		static int probe_point_line_walker(const char *fname, int lineno,
		Dwarf_Addr addr, void *data)
		{
		struct probe_finder *pf = data;
		Dwarf_Die *sc_die, die_mem;
		int ret;

		if (lineno != pf->lno \|\| strtailcmp(fname, pf->fname) != 0)
		return 0;

		pf->addr = addr;
		ret = call_probe_finder(NULL, pf);
		sc_die = find_best_scope(pf, &die_mem);
		if (!sc_die) {
		pr_warning("Failed to find scope of probe point.\n");
		return -ENOENT;
		}

		ret = call_probe_finder(sc_die, pf);

		/* Continue if no error, because the line will be in inline function */
		return ret < 0 ? ret : 0;
		@@ -827,6 +882,7 @@ static int probe_point_lazy_walker(const char *fname, int lineno,
		Dwarf_Addr addr, void *data)
		{
		struct probe_finder *pf = data;
		Dwarf_Die *sc_die, die_mem;
		int ret;

		if (!line_list__has_line(&pf->lcache, lineno) \|\|
		@@ -836,7 +892,14 @@ static int probe_point_lazy_walker(const char *fname, int lineno,
		pr_debug("Probe line found: line:%d addr:0x%llx\n",
		lineno, (unsigned long long)addr);
		pf->addr = addr;
		ret = call_probe_finder(NULL, pf);
		pf->lno = lineno;
		sc_die = find_best_scope(pf, &die_mem);
		if (!sc_die) {
		pr_warning("Failed to find scope of probe point.\n");
		return -ENOENT;
		}

		ret = call_probe_finder(sc_die, pf);

		/*
		* Continue if no error, because the lazy pattern will match
		@@ -861,42 +924,39 @@ static int find_probe_point_lazy(Dwarf_Die sp_die, struct probe_finder pf)
		return die_walk_lines(sp_die, probe_point_lazy_walker, pf);
		}

		/* Callback parameter with return value */
		struct dwarf_callback_param {
		void *data;
		int retval;
		};

		static int probe_point_inline_cb(Dwarf_Die in_die, void data)
		{
		struct dwarf_callback_param *param = data;
		struct probe_finder *pf = param->data;
		struct probe_finder *pf = data;
		struct perf_probe_point *pp = &pf->pev->point;
		Dwarf_Addr addr;
		int ret;

		if (pp->lazy_line)
		param->retval = find_probe_point_lazy(in_die, pf);
		ret = find_probe_point_lazy(in_die, pf);
		else {
		/* Get probe address */
		if (dwarf_entrypc(in_die, &addr) != 0) {
		pr_warning("Failed to get entry address of %s.\n",
		dwarf_diename(in_die));
		param->retval = -ENOENT;
		return DWARF_CB_ABORT;
		return -ENOENT;
		}
		pf->addr = addr;
		pf->addr += pp->offset;
		pr_debug("found inline addr: 0x%jx\n",
		(uintmax_t)pf->addr);

		param->retval = call_probe_finder(in_die, pf);
		if (param->retval < 0)
		return DWARF_CB_ABORT;
		ret = call_probe_finder(in_die, pf);
		}

		return DWARF_CB_OK;
		return ret;
		}

		/* Callback parameter with return value for libdw */
		struct dwarf_callback_param {
		void *data;
		int retval;
		};

		/* Search function from function name */
		static int probe_point_search_cb(Dwarf_Die sp_die, void data)
		{
		@@ -933,14 +993,10 @@ static int probe_point_search_cb(Dwarf_Die sp_die, void data)
		/* TODO: Check the address in this function */
		param->retval = call_probe_finder(sp_die, pf);
		}
		} else {
		struct dwarf_callback_param _param = {.data = (void *)pf,
		.retval = 0};
		} else
		/* Inlined function: search instances */
		dwarf_func_inline_instances(sp_die, probe_point_inline_cb,
		&_param);
		param->retval = _param.retval;
		}
		param->retval = die_walk_instances(sp_die,
		probe_point_inline_cb, (void *)pf);

		return DWARF_CB_ABORT; /* Exit; no same symbol in this CU. */
		}
		@@ -1060,7 +1116,7 @@ static int debuginfo__find_probes(struct debuginfo *self,
		}

		/* Add a found probe point into trace event list */
		static int add_probe_trace_event(Dwarf_Die sp_die, struct probe_finder pf)
		static int add_probe_trace_event(Dwarf_Die sc_die, struct probe_finder pf)
		{
		struct trace_event_finder *tf =
		container_of(pf, struct trace_event_finder, pf);
		@@ -1075,8 +1131,9 @@ static int add_probe_trace_event(Dwarf_Die sp_die, struct probe_finder pf)
		}
		tev = &tf->tevs[tf->ntevs++];

		ret = convert_to_trace_point(sp_die, pf->addr, pf->pev->point.retprobe,
		&tev->point);
		/* Trace point should be converted from subprogram DIE */
		ret = convert_to_trace_point(&pf->sp_die, pf->addr,
		pf->pev->point.retprobe, &tev->point);
		if (ret < 0)
		return ret;

		@@ -1091,7 +1148,8 @@ static int add_probe_trace_event(Dwarf_Die sp_die, struct probe_finder pf)
		for (i = 0; i < pf->pev->nargs; i++) {
		pf->pvar = &pf->pev->args[i];
		pf->tvar = &tev->args[i];
		ret = find_variable(sp_die, pf);
		/* Variable should be found from scope DIE */
		ret = find_variable(sc_die, pf);
		if (ret != 0)
		return ret;
		}
		@@ -1159,13 +1217,13 @@ static int collect_variables_cb(Dwarf_Die die_mem, void data)
		}

		/* Add a found vars into available variables list */
		static int add_available_vars(Dwarf_Die sp_die, struct probe_finder pf)
		static int add_available_vars(Dwarf_Die sc_die, struct probe_finder pf)
		{
		struct available_var_finder *af =
		container_of(pf, struct available_var_finder, pf);
		struct variable_list *vl;
		Dwarf_Die die_mem, *scopes = NULL;
		int ret, nscopes;
		Dwarf_Die die_mem;
		int ret;

		/* Check number of tevs */
		if (af->nvls == af->max_vls) {
		@@ -1174,8 +1232,9 @@ static int add_available_vars(Dwarf_Die sp_die, struct probe_finder pf)
		}
		vl = &af->vls[af->nvls++];

		ret = convert_to_trace_point(sp_die, pf->addr, pf->pev->point.retprobe,
		&vl->point);
		/* Trace point should be converted from subprogram DIE */
		ret = convert_to_trace_point(&pf->sp_die, pf->addr,
		pf->pev->point.retprobe, &vl->point);
		if (ret < 0)
		return ret;

		@@ -1187,19 +1246,14 @@ static int add_available_vars(Dwarf_Die sp_die, struct probe_finder pf)
		if (vl->vars == NULL)
		return -ENOMEM;
		af->child = true;
		die_find_child(sp_die, collect_variables_cb, (void *)af, &die_mem);
		die_find_child(sc_die, collect_variables_cb, (void *)af, &die_mem);

		/* Find external variables */
		if (!af->externs)
		goto out;
		/* Don't need to search child DIE for externs. */
		af->child = false;
		nscopes = dwarf_getscopes_die(sp_die, &scopes);
		while (nscopes-- > 1)
		die_find_child(&scopes[nscopes], collect_variables_cb,
		(void *)af, &die_mem);
		if (scopes)
		free(scopes);
		die_find_child(&pf->cu_die, collect_variables_cb, (void *)af, &die_mem);

		out:
		if (strlist__empty(vl->vars)) {
		@@ -1391,10 +1445,14 @@ static int find_line_range_by_line(Dwarf_Die sp_die, struct line_finder lf)

		static int line_range_inline_cb(Dwarf_Die in_die, void data)
		{
		struct dwarf_callback_param *param = data;
		find_line_range_by_line(in_die, data);

		param->retval = find_line_range_by_line(in_die, param->data);
		return DWARF_CB_ABORT; /* No need to find other instances */
		/*
		* We have to check all instances of inlined function, because
		* some execution paths can be optimized out depends on the
		* function argument of instances
		*/
		return 0;
		}

		/* Search function from function name */
		@@ -1422,15 +1480,10 @@ static int line_range_search_cb(Dwarf_Die sp_die, void data)
		pr_debug("New line range: %d to %d\n", lf->lno_s, lf->lno_e);
		lr->start = lf->lno_s;
		lr->end = lf->lno_e;
		if (dwarf_func_inline(sp_die)) {
		struct dwarf_callback_param _param;
		_param.data = (void *)lf;
		_param.retval = 0;
		dwarf_func_inline_instances(sp_die,
		line_range_inline_cb,
		&_param);
		param->retval = _param.retval;
		} else
		if (dwarf_func_inline(sp_die))
		param->retval = die_walk_instances(sp_die,
		line_range_inline_cb, lf);
		else
		param->retval = find_line_range_by_line(sp_die, lf);
		return DWARF_CB_ABORT;
		}