[PATCH v5 5/9] perf hists browser: Factor out hist_browser__show_callchain_list()

From: Namhyung Kim
Date: Mon Nov 09 2015 - 00:47:10 EST


This function is to print a single callchain list entry. As this
function will be used by other function, factor out to a separate
function.

Cc: Brendan Gregg <brendan.d.gregg@xxxxxxxxx>
Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
---
tools/perf/ui/browsers/hists.c | 72 ++++++++++++++++++++++++++----------------
1 file changed, 45 insertions(+), 27 deletions(-)

diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index a8897aab4c4a..b5c2d073c6b6 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -574,6 +574,44 @@ static bool hist_browser__check_dump_full(struct hist_browser *browser __maybe_u

#define LEVEL_OFFSET_STEP 3

+static int hist_browser__show_callchain_list(struct hist_browser *browser,
+ struct callchain_node *node,
+ struct callchain_list *chain,
+ unsigned short row, u64 total,
+ bool need_percent, int offset,
+ print_callchain_entry_fn print,
+ struct callchain_print_arg *arg)
+{
+ char bf[1024], *alloc_str;
+ const char *str;
+
+ if (arg->row_offset != 0) {
+ arg->row_offset--;
+ return 0;
+ }
+
+ alloc_str = NULL;
+ str = callchain_list__sym_name(chain, bf, sizeof(bf),
+ browser->show_dso);
+
+ if (need_percent) {
+ char buf[64];
+
+ callchain_node__sprintf_value(node, buf, sizeof(buf),
+ total);
+
+ if (asprintf(&alloc_str, "%s %s", buf, str) < 0)
+ str = "Not enough memory!";
+ else
+ str = alloc_str;
+ }
+
+ print(browser, chain, str, offset, row, arg);
+
+ free(alloc_str);
+ return 1;
+}
+
static int hist_browser__show_callchain(struct hist_browser *browser,
struct rb_root *root, int level,
unsigned short row, u64 total,
@@ -598,8 +636,6 @@ static int hist_browser__show_callchain(struct hist_browser *browser,
int extra_offset = 0;

list_for_each_entry(chain, &child->val, list) {
- char bf[1024], *alloc_str;
- const char *str;
bool was_first = first;

if (first)
@@ -608,34 +644,16 @@ static int hist_browser__show_callchain(struct hist_browser *browser,
extra_offset = LEVEL_OFFSET_STEP;

folded_sign = callchain_list__folded(chain);
- if (arg->row_offset != 0) {
- arg->row_offset--;
- goto do_next;
- }

- alloc_str = NULL;
- str = callchain_list__sym_name(chain, bf, sizeof(bf),
- browser->show_dso);
+ row += hist_browser__show_callchain_list(browser, child,
+ chain, row, total,
+ was_first && need_percent,
+ offset + extra_offset,
+ print, arg);

- if (was_first && need_percent) {
- char buf[64];
-
- callchain_node__sprintf_value(child, buf, sizeof(buf),
- total);
-
- if (asprintf(&alloc_str, "%s %s", buf, str) < 0)
- str = "Not enough memory!";
- else
- str = alloc_str;
- }
-
- print(browser, chain, str, offset + extra_offset, row, arg);
-
- free(alloc_str);
-
- if (is_output_full(browser, ++row))
+ if (is_output_full(browser, row))
goto out;
-do_next:
+
if (folded_sign == '+')
break;
}
--
2.6.2

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