linux-kernel - [PATCH 57/61] perf c2c report: Add support to manage symbol name length

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1474290610-23241-58-git-send-email-jolsa@kernel.org>
Date:   Mon, 19 Sep 2016 15:10:06 +0200
From:   Jiri Olsa <jolsa@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     lkml <linux-kernel@...r.kernel.org>,
        Don Zickus <dzickus@...hat.com>, Joe Mario <jmario@...hat.com>,
        Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Namhyung Kim <namhyung@...nel.org>,
        David Ahern <dsahern@...il.com>,
        Andi Kleen <andi@...stfloor.org>
Subject: [PATCH 57/61] perf c2c report: Add support to manage symbol name length

The width of symbol and source line entries could get really long
and not convenient to display. Adding support to display only
patrt of such strings and possibility to switch to full length
by uing --full-symbols option or 's' key in TUI browser.

Link: http://lkml.kernel.org/n/tip-yxf5hfteyfaoi8xrgczqtyha@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@...nel.org>
---
 tools/perf/builtin-c2c.c | 33 ++++++++++++++++++++++++++++++++-
 1 file changed, 32 insertions(+), 1 deletion(-)

diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index eb78a73b9230..1adb7fb4866c 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -62,6 +62,7 @@ struct perf_c2c {
 	bool			 show_src;
 	bool			 use_stdio;
 	bool			 stats_only;
+	bool			 symbol_full;
 
 	/* HITM shared clines stats */
 	struct c2c_stats	hitm_stats;
@@ -334,6 +335,21 @@ struct c2c_fmt {
 	struct c2c_dimension	*dim;
 };
 
+#define SYMBOL_WIDTH 30
+
+static struct c2c_dimension dim_symbol;
+static struct c2c_dimension dim_srcline;
+
+static int symbol_width(struct hists *hists, struct sort_entry *se)
+{
+	int width = hists__col_len(hists, se->se_width_idx);
+
+	if (!c2c.symbol_full)
+		width = MIN(width, SYMBOL_WIDTH);
+
+	return width;
+}
+
 static int c2c_width(struct perf_hpp_fmt *fmt,
 		     struct perf_hpp *hpp __maybe_unused,
 		     struct hists *hists __maybe_unused)
@@ -344,6 +360,9 @@ static int c2c_width(struct perf_hpp_fmt *fmt,
 	c2c_fmt = container_of(fmt, struct c2c_fmt, fmt);
 	dim = c2c_fmt->dim;
 
+	if (dim == &dim_symbol || dim == &dim_srcline)
+		return symbol_width(hists, dim->se);
+
 	return dim->se ? hists__col_len(hists, dim->se->se_width_idx) :
 			 c2c_fmt->dim->width;
 }
@@ -1564,9 +1583,13 @@ static int c2c_se_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
 	struct c2c_dimension *dim = c2c_fmt->dim;
 	size_t len = fmt->user_len;
 
-	if (!len)
+	if (!len) {
 		len = hists__col_len(he->hists, dim->se->se_width_idx);
 
+		if (dim == &dim_symbol || dim == &dim_srcline)
+			len = symbol_width(he->hists, dim->se);
+	}
+
 	return dim->se->se_snprintf(he, hpp->buf, hpp->size, len);
 }
 
@@ -2156,6 +2179,9 @@ static int perf_c2c__browse_cacheline(struct hist_entry *he)
 	struct hist_browser *browser;
 	int key = -1;
 
+	/* Display compact version first. */
+	c2c.symbol_full = false;
+
 	c2c_he = container_of(he, struct c2c_hist_entry, he);
 	c2c_hists = c2c_he->hists;
 
@@ -2175,6 +2201,9 @@ static int perf_c2c__browse_cacheline(struct hist_entry *he)
 		key = hist_browser__run(browser, "help");
 
 		switch (key) {
+		case 's':
+			c2c.symbol_full = !c2c.symbol_full;
+			break;
 		case 'q':
 			goto out;
 		default:
@@ -2430,6 +2459,8 @@ static int perf_c2c__report(int argc, const char **argv)
 		    "Use the stdio interface"),
 	OPT_BOOLEAN(0, "stats", &c2c.stats_only,
 		    "Use the stdio interface"),
+	OPT_BOOLEAN(0, "full-symbols", &c2c.symbol_full,
+		    "Display full length of symbols"),
 	OPT_CALLBACK_DEFAULT('g', "call-graph", &callchain_param,
 			     "print_type,threshold[,print_limit],order,sort_key[,branch],value",
 			     callchain_help, &parse_callchain_opt,
-- 
2.7.4