Re: [PATCH v2] perf annotate: allow 's' on source code lines
From: Ian Rogers <irogers@google.com>
Date: 2021-06-25 05:37:22
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On Thu, Jun 24, 2021 at 3:37 PM Riccardo Mancini [off-list ref] wrote:
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 <redacted>
Acked-by: Ian Rogers <irogers@google.com>
quoted hunk ↗ jump to hunk
--- 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 */
comment nit, perhaps prefer "closest" rather than "next" due to searching backward. Thanks, Ian
+ 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