Commit 8ff9daf3 authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo
Browse files

perf strlist: Allow substitutions from file contents in a given directory 

So, if we have an strlist equal to:

   "file,close"

And we call it as:

   struct strlist_config *config = { .dirname = "~/strace/groups", };
   struct strlist *slist = strlist__new("file, close", &config);

And we have:
  $ cat ~/strace/groups/file
  access
  open
  openat
  statfs

Then the resulting strlist will have these contents:

  [ "access", "open", "openat", "statfs", "close" ]

This will be used to implement strace syscall groups in 'perf trace',
but can be used in some other tool, thus being implemented in 'strlist'.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-wi6l6qtomqlywwr6005jvs05@git.kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 4a77e218

tools/perf/util/strlist.c

+34 −7
Original line number Diff line number Diff line
@@ -108,29 +108,47 @@ struct str_node *strlist__find(struct strlist *slist, const char *entry) 
	return snode;

}



static int strlist__parse_list_entry(struct strlist *slist, const char *s)

static int strlist__parse_list_entry(struct strlist *slist, const char *s,

				     const char *subst_dir)

{

	int err;

	char *subst = NULL;



	if (strncmp(s, "file://", 7) == 0)

		return strlist__load(slist, s + 7);



	return strlist__add(slist, s);

	if (subst_dir) {

		err = -ENOMEM;

		if (asprintf(&subst, "%s/%s", subst_dir, s) < 0)

			goto out;



		if (access(subst, F_OK) == 0) {

			err = strlist__load(slist, subst);

			goto out;

		}

	}



	err = strlist__add(slist, s);

out:

	free(subst);

	return err;

}



int strlist__parse_list(struct strlist *slist, const char *s)

int strlist__parse_list(struct strlist *slist, const char *s, const char *subst_dir)

{

	char *sep;

	int err;



	while ((sep = strchr(s, ',')) != NULL) {

		*sep = '\0';

		err = strlist__parse_list_entry(slist, s);

		err = strlist__parse_list_entry(slist, s, subst_dir);

		*sep = ',';

		if (err != 0)

			return err;

		s = sep + 1;

	}



	return *s ? strlist__parse_list_entry(slist, s) : 0;

	return *s ? strlist__parse_list_entry(slist, s, subst_dir) : 0;

}



struct strlist *strlist__new(const char *list, const struct strlist_config *config)
@@ -138,13 +156,22 @@ struct strlist *strlist__new(const char *list, const struct strlist_config *conf 
	struct strlist *slist = malloc(sizeof(*slist));



	if (slist != NULL) {

		bool dupstr = true;

		const char *dirname = NULL;



		if (config) {

			dupstr = !config->dont_dupstr;

			dirname = config->dirname;

		}



		rblist__init(&slist->rblist);

		slist->rblist.node_cmp    = strlist__node_cmp;

		slist->rblist.node_new    = strlist__node_new;

		slist->rblist.node_delete = strlist__node_delete;



		slist->dupstr	 = config ? !config->dont_dupstr : true;

		if (list && strlist__parse_list(slist, list) != 0)

		slist->dupstr	 = dupstr;



		if (list && strlist__parse_list(slist, list, dirname) != 0)

			goto out_error;

	}

tools/perf/util/strlist.h

+2 −1
Original line number Diff line number Diff line
@@ -18,6 +18,7 @@ struct strlist { 


struct strlist_config {

	bool dont_dupstr;

	const char *dirname;

};



struct strlist *strlist__new(const char *slist, const struct strlist_config *config);
@@ -79,5 +80,5 @@ static inline struct str_node *strlist__next(struct str_node *sn) 
	for (pos = strlist__first(slist), n = strlist__next(pos); pos;\

	     pos = n, n = strlist__next(n))



int strlist__parse_list(struct strlist *slist, const char *s);

int strlist__parse_list(struct strlist *slist, const char *s, const char *subst_dir);

#endif /* __PERF_STRLIST_H */

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