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Date:	Thu, 06 Feb 2014 05:32:09 +0000
From:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	David Ahern <dsahern@...il.com>, linux-kernel@...r.kernel.org,
	"Steven Rostedt (Red Hat)" <rostedt@...dmis.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Ingo Molnar <mingo@...hat.com>,
	"David A. Long" <dave.long@...aro.org>,
	yrl.pp-manager.tt@...achi.com, Namhyung Kim <namhyung@...nel.org>
Subject: [PATCH -tip v3 03/11] [CLEANUP] perf-probe: Replace line_list with
 intlist

Replace line_list (struct line_node) with intlist for
reducing similar codes.

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
---
 tools/perf/builtin-probe.c     |   12 +++---
 tools/perf/util/probe-event.c  |   22 +++++------
 tools/perf/util/probe-event.h  |   12 +-----
 tools/perf/util/probe-finder.c |   81 ++++++----------------------------------
 tools/perf/util/probe-finder.h |    3 +
 5 files changed, 35 insertions(+), 95 deletions(-)

diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index 7894888..cdcd4eb 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -268,9 +268,9 @@ static int opt_set_filter(const struct option *opt __maybe_unused,
 	return 0;
 }
 
-static void init_params(void)
+static int init_params(void)
 {
-	line_range__init(&params.line_range);
+	return line_range__init(&params.line_range);
 }
 
 static void cleanup_params(void)
@@ -515,9 +515,11 @@ int cmd_probe(int argc, const char **argv, const char *prefix)
 {
 	int ret;
 
-	init_params();
-	ret = __cmd_probe(argc, argv, prefix);
-	cleanup_params();
+	ret = init_params();
+	if (!ret) {
+		ret = __cmd_probe(argc, argv, prefix);
+		cleanup_params();
+	}
 
 	return ret;
 }
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index a4649e7..f70fd08 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -561,7 +561,7 @@ static int _show_one_line(FILE *fp, int l, bool skip, bool show_num)
 static int __show_line_range(struct line_range *lr, const char *module)
 {
 	int l = 1;
-	struct line_node *ln;
+	struct int_node *ln;
 	struct debuginfo *dinfo;
 	FILE *fp;
 	int ret;
@@ -614,8 +614,8 @@ static int __show_line_range(struct line_range *lr, const char *module)
 			goto end;
 	}
 
-	list_for_each_entry(ln, &lr->line_list, list) {
-		for (; ln->line > l; l++) {
+	intlist__for_each(ln, lr->line_list) {
+		for (; ln->i > l; l++) {
 			ret = show_one_line(fp, l - lr->offset);
 			if (ret < 0)
 				goto end;
@@ -775,24 +775,22 @@ int show_available_vars(struct perf_probe_event *pevs __maybe_unused,
 
 void line_range__clear(struct line_range *lr)
 {
-	struct line_node *ln;
-
 	free(lr->function);
 	free(lr->file);
 	free(lr->path);
 	free(lr->comp_dir);
-	while (!list_empty(&lr->line_list)) {
-		ln = list_first_entry(&lr->line_list, struct line_node, list);
-		list_del(&ln->list);
-		free(ln);
-	}
+	intlist__delete(lr->line_list);
 	memset(lr, 0, sizeof(*lr));
 }
 
-void line_range__init(struct line_range *lr)
+int line_range__init(struct line_range *lr)
 {
 	memset(lr, 0, sizeof(*lr));
-	INIT_LIST_HEAD(&lr->line_list);
+	lr->line_list = intlist__new(NULL);
+	if (!lr->line_list)
+		return -ENOMEM;
+	else
+		return 0;
 }
 
 static int parse_line_num(char **ptr, int *val, const char *what)
diff --git a/tools/perf/util/probe-event.h b/tools/perf/util/probe-event.h
index fcaf727..776c934 100644
--- a/tools/perf/util/probe-event.h
+++ b/tools/perf/util/probe-event.h
@@ -2,6 +2,7 @@
 #define _PROBE_EVENT_H
 
 #include <stdbool.h>
+#include "intlist.h"
 #include "strlist.h"
 #include "strfilter.h"
 
@@ -76,13 +77,6 @@ struct perf_probe_event {
 	struct perf_probe_arg	*args;	/* Arguments */
 };
 
-
-/* Line number container */
-struct line_node {
-	struct list_head	list;
-	int			line;
-};
-
 /* Line range */
 struct line_range {
 	char			*file;		/* File name */
@@ -92,7 +86,7 @@ struct line_range {
 	int			offset;		/* Start line offset */
 	char			*path;		/* Real path name */
 	char			*comp_dir;	/* Compile directory */
-	struct list_head	line_list;	/* Visible lines */
+	struct intlist		*line_list;	/* Visible lines */
 };
 
 /* List of variables */
@@ -124,7 +118,7 @@ extern int parse_line_range_desc(const char *cmd, struct line_range *lr);
 extern void line_range__clear(struct line_range *lr);
 
 /* Initialize line range */
-extern void line_range__init(struct line_range *lr);
+extern int line_range__init(struct line_range *lr);
 
 /* Internal use: Return kernel/module path */
 extern const char *kernel_get_module_path(const char *module);
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index 061edb1..e5e589f 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -35,6 +35,7 @@
 #include <linux/bitops.h>
 #include "event.h"
 #include "debug.h"
+#include "intlist.h"
 #include "util.h"
 #include "symbol.h"
 #include "probe-finder.h"
@@ -42,65 +43,6 @@
 /* Kprobe tracer basic type is up to u64 */
 #define MAX_BASIC_TYPE_BITS	64
 
-/* Line number list operations */
-
-/* Add a line to line number list */
-static int line_list__add_line(struct list_head *head, int line)
-{
-	struct line_node *ln;
-	struct list_head *p;
-
-	/* Reverse search, because new line will be the last one */
-	list_for_each_entry_reverse(ln, head, list) {
-		if (ln->line < line) {
-			p = &ln->list;
-			goto found;
-		} else if (ln->line == line)	/* Already exist */
-			return 1;
-	}
-	/* List is empty, or the smallest entry */
-	p = head;
-found:
-	pr_debug("line list: add a line %u\n", line);
-	ln = zalloc(sizeof(struct line_node));
-	if (ln == NULL)
-		return -ENOMEM;
-	ln->line = line;
-	INIT_LIST_HEAD(&ln->list);
-	list_add(&ln->list, p);
-	return 0;
-}
-
-/* Check if the line in line number list */
-static int line_list__has_line(struct list_head *head, int line)
-{
-	struct line_node *ln;
-
-	/* Reverse search, because new line will be the last one */
-	list_for_each_entry(ln, head, list)
-		if (ln->line == line)
-			return 1;
-
-	return 0;
-}
-
-/* Init line number list */
-static void line_list__init(struct list_head *head)
-{
-	INIT_LIST_HEAD(head);
-}
-
-/* Free line number list */
-static void line_list__free(struct list_head *head)
-{
-	struct line_node *ln;
-	while (!list_empty(head)) {
-		ln = list_first_entry(head, struct line_node, list);
-		list_del(&ln->list);
-		free(ln);
-	}
-}
-
 /* Dwarf FL wrappers */
 static char *debuginfo_path;	/* Currently dummy */
 
@@ -880,7 +822,7 @@ static int find_probe_point_by_line(struct probe_finder *pf)
 }
 
 /* Find lines which match lazy pattern */
-static int find_lazy_match_lines(struct list_head *head,
+static int find_lazy_match_lines(struct intlist *list,
 				 const char *fname, const char *pat)
 {
 	FILE *fp;
@@ -901,7 +843,7 @@ static int find_lazy_match_lines(struct list_head *head,
 			line[len - 1] = '\0';
 
 		if (strlazymatch(line, pat)) {
-			line_list__add_line(head, linenum);
+			intlist__add(list, linenum);
 			count++;
 		}
 		linenum++;
@@ -924,7 +866,7 @@ static int probe_point_lazy_walker(const char *fname, int lineno,
 	Dwarf_Die *sc_die, die_mem;
 	int ret;
 
-	if (!line_list__has_line(&pf->lcache, lineno) ||
+	if (!intlist__has_entry(pf->lcache, lineno) ||
 	    strtailcmp(fname, pf->fname) != 0)
 		return 0;
 
@@ -952,9 +894,9 @@ static int find_probe_point_lazy(Dwarf_Die *sp_die, struct probe_finder *pf)
 {
 	int ret = 0;
 
-	if (list_empty(&pf->lcache)) {
+	if (intlist__empty(pf->lcache)) {
 		/* Matching lazy line pattern */
-		ret = find_lazy_match_lines(&pf->lcache, pf->fname,
+		ret = find_lazy_match_lines(pf->lcache, pf->fname,
 					    pf->pev->point.lazy_line);
 		if (ret <= 0)
 			return ret;
@@ -1096,7 +1038,9 @@ static int debuginfo__find_probes(struct debuginfo *dbg,
 #endif
 
 	off = 0;
-	line_list__init(&pf->lcache);
+	pf->lcache = intlist__new(NULL);
+	if (!pf->lcache)
+		return -ENOMEM;
 
 	/* Fastpath: lookup by function name from .debug_pubnames section */
 	if (pp->function) {
@@ -1149,7 +1093,8 @@ static int debuginfo__find_probes(struct debuginfo *dbg,
 	}
 
 found:
-	line_list__free(&pf->lcache);
+	intlist__delete(pf->lcache);
+	pf->lcache = NULL;
 
 	return ret;
 }
@@ -1537,7 +1482,7 @@ static int line_range_add_line(const char *src, unsigned int lineno,
 		if (lr->path == NULL)
 			return -ENOMEM;
 	}
-	return line_list__add_line(&lr->line_list, lineno);
+	return intlist__add(lr->line_list, lineno);
 }
 
 static int line_range_walk_cb(const char *fname, int lineno,
@@ -1565,7 +1510,7 @@ static int find_line_range_by_line(Dwarf_Die *sp_die, struct line_finder *lf)
 
 	/* Update status */
 	if (ret >= 0)
-		if (!list_empty(&lf->lr->line_list))
+		if (!intlist__empty(lf->lr->line_list))
 			ret = lf->found = 1;
 		else
 			ret = 0;	/* Lines are not found */
diff --git a/tools/perf/util/probe-finder.h b/tools/perf/util/probe-finder.h
index ffc33cd..592c4da 100644
--- a/tools/perf/util/probe-finder.h
+++ b/tools/perf/util/probe-finder.h
@@ -3,6 +3,7 @@
 
 #include <stdbool.h>
 #include "util.h"
+#include "intlist.h"
 #include "probe-event.h"
 
 #define MAX_PROBE_BUFFER	1024
@@ -66,7 +67,7 @@ struct probe_finder {
 	const char		*fname;		/* Real file name */
 	Dwarf_Die		cu_die;		/* Current CU */
 	Dwarf_Die		sp_die;
-	struct list_head	lcache;		/* Line cache for lazy match */
+	struct intlist		*lcache;	/* Line cache for lazy match */
 
 	/* For variable searching */
 #if _ELFUTILS_PREREQ(0, 142)


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