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* [PATCH v2] perf annotate: allow 's' on source code lines
@ 2021-06-24 22:34 Riccardo Mancini
  2021-06-25  5:37 ` Ian Rogers
  0 siblings, 1 reply; 5+ messages in thread
From: Riccardo Mancini @ 2021-06-24 22:34 UTC (permalink / raw)
  To: Arnaldo Carvalho de Melo
  Cc: Namhyung Kim, Ian Rogers, Riccardo Mancini, Peter Zijlstra,
	Ingo Molnar, Mark Rutland, Alexander Shishkin, Jiri Olsa,
	Martin Liska, linux-perf-users, linux-kernel

In perf annotate, when 's' is pressed on a line containing
source code, it shows the message "Only available for assembly
lines".
This patch gets rid of the error, moving the cursr to the next
available asm line (or the closest previous one if no asm line
is found moving forwards), before hiding source code lines.

Changes in v2:
 - handle case of no asm line found in
   annotate_browser__find_next_asm_line by returning NULL and
   handling error in caller.

Signed-off-by: Riccardo Mancini <rickyman7@gmail.com>
---
 tools/perf/ui/browsers/annotate.c | 32 ++++++++++++++++++++++++++++---
 1 file changed, 29 insertions(+), 3 deletions(-)

diff --git a/tools/perf/ui/browsers/annotate.c b/tools/perf/ui/browsers/annotate.c
index ad0a70f0edaf..f5509a958e38 100644
--- a/tools/perf/ui/browsers/annotate.c
+++ b/tools/perf/ui/browsers/annotate.c
@@ -343,6 +343,29 @@ static void annotate_browser__calc_percent(struct annotate_browser *browser,
 	browser->curr_hot = rb_last(&browser->entries);
 }
 
+static struct annotation_line *annotate_browser__find_next_asm_line(
+					struct annotate_browser *browser,
+					struct annotation_line *al)
+{
+	struct annotation_line *it = al;
+
+	/* find next asm line */
+	list_for_each_entry_continue(it, browser->b.top, node) {
+		if (it->idx_asm >= 0)
+			return it;
+	}
+
+	/* no asm line found forwards, try backwards */
+	it = al;
+	list_for_each_entry_continue_reverse(it, browser->b.top, node) {
+		if (it->idx_asm >= 0)
+			return it;
+	}
+
+	/* There are no asm lines */
+	return NULL;
+}
+
 static bool annotate_browser__toggle_source(struct annotate_browser *browser)
 {
 	struct annotation *notes = browser__annotation(&browser->b);
@@ -363,9 +386,12 @@ static bool annotate_browser__toggle_source(struct annotate_browser *browser)
 		browser->b.index = al->idx;
 	} else {
 		if (al->idx_asm < 0) {
-			ui_helpline__puts("Only available for assembly lines.");
-			browser->b.seek(&browser->b, -offset, SEEK_CUR);
-			return false;
+			/* move cursor to next asm line */
+			al = annotate_browser__find_next_asm_line(browser, al);
+			if (!al) {
+				browser->b.seek(&browser->b, -offset, SEEK_CUR);
+				return false;
+			}
 		}
 
 		if (al->idx_asm < offset)
-- 
2.31.1


^ permalink raw reply	[flat|nested] 5+ messages in thread

end of thread, other threads:[~2021-07-01 18:03 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-06-24 22:34 [PATCH v2] perf annotate: allow 's' on source code lines Riccardo Mancini
2021-06-25  5:37 ` Ian Rogers
2021-06-25 15:53   ` Riccardo Mancini
2021-06-29 15:00     ` Ian Rogers
2021-07-01 18:03       ` Arnaldo Carvalho de Melo

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